US20140120002A1 - Arrangement of a flue gas treatment system and a combustion device - Google Patents

Arrangement of a flue gas treatment system and a combustion device Download PDF

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Publication number
US20140120002A1
US20140120002A1 US14/063,286 US201314063286A US2014120002A1 US 20140120002 A1 US20140120002 A1 US 20140120002A1 US 201314063286 A US201314063286 A US 201314063286A US 2014120002 A1 US2014120002 A1 US 2014120002A1
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Prior art keywords
flue gas
catalytic reduction
selective catalytic
scr
reduction unit
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US14/063,286
Inventor
Lars Nilsson
Jean-Marc Gilbert AMANN
Erik W. Böös
Jörgen Per-Olof GRUBBSTRÖM
Wuyin Wang
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General Electric Technology GmbH
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Alstom Technology AG
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Assigned to ALSTOM TECHNOLOGY LTD reassignment ALSTOM TECHNOLOGY LTD ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: Grubbström, Jörgen Per-Olof, WANG, WUYIN, AMANN, Jean-Marc Gilbert, Böös, Erik W., NILSSON, LARS
Publication of US20140120002A1 publication Critical patent/US20140120002A1/en
Assigned to GENERAL ELECTRIC TECHNOLOGY GMBH reassignment GENERAL ELECTRIC TECHNOLOGY GMBH CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: ALSTOM TECHNOLOGY LTD
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/54—Nitrogen compounds
    • B01D53/56—Nitrogen oxides
    • B01D53/565—Nitrogen oxides by treating the gases with solids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/75—Multi-step processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/864—Removing carbon monoxide or hydrocarbons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C99/00—Subject-matter not provided for in other groups of this subclass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/10—Oxidants
    • B01D2251/102—Oxygen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/20—Reductants
    • B01D2251/206—Ammonium compounds
    • B01D2251/2062—Ammonia
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/20—Reductants
    • B01D2251/206—Ammonium compounds
    • B01D2251/2067—Urea
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/10—Noble metals or compounds thereof
    • B01D2255/102—Platinum group metals
    • B01D2255/1021—Platinum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/10—Noble metals or compounds thereof
    • B01D2255/102—Platinum group metals
    • B01D2255/1023—Palladium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2256/00—Main component in the product gas stream after treatment
    • B01D2256/22—Carbon dioxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/10—Single element gases other than halogens
    • B01D2257/104—Oxygen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/30—Sulfur compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/40—Nitrogen compounds
    • B01D2257/404—Nitrogen oxides other than dinitrogen oxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/50—Carbon oxides
    • B01D2257/502—Carbon monoxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/26—Drying gases or vapours
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8621—Removing nitrogen compounds
    • B01D53/8625—Nitrogen oxides
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00—Capture or disposal of greenhouse gases
    • Y02C20/40—Capture or disposal of greenhouse gases of CO2

Definitions

  • the present disclosure relates to an arrangement of a flue gas treatment system and a combustion device.
  • the boiler is preferably an oxyfired boiler, i.e. a boiler in which a fuel is combusted using pure or almost pure oxygen as an oxidizing agent.
  • FIG. 1 shows an example of a known flue gas treatment system 1 connected to a combustion device 2 such as a boiler.
  • FIG. 1 shows that the flue gas treatment system 1 has a selective catalytic reduction unit SCR located immediately downstream of the combustion device 2 ; at the selective catalytic reduction unit SCR NO x is converted into N 2 and H 2 O. Downstream of the selective catalytic reduction unit SCR a pre-heater 4 is provided, to pre-heat the air to be provided to the boiler (namely to the combustion chamber of the boiler). Thus an electrostatic precipitator ESP for removal of particles and a wet flue gas desulphurization WFGD are provided. From the wet flue gas desulphurization WFGD the flue gas is sent to the stack.
  • ESP electrostatic precipitator
  • the known flue gas treatment system has some drawbacks.
  • the selective catalytic reduction unit SCR since all flue gas has to pass through the selective catalytic reduction unit SCR, the selective catalytic reduction unit SCR must have a large size (i.e. large enough for the whole flue gas).
  • An aspect of the disclosure includes providing an arrangement of a flue gas treatment system and a combustion device by which the selective catalytic reduction unit SCR has a smaller dimension than what needed for known flue gas treatment systems.
  • FIG. 1 is a schematic view of a flue gas treatment system according to the prior art
  • FIG. 2 is a schematic view of a flue gas treatment system in an embodiment of the invention.
  • this shows an arrangement of a flue gas treatment system 1 and a combustion device 2 such as a boiler.
  • the boiler is preferably an oxyfiring boiler, i.e. a boiler having a combustion chamber that is supplied with a fuel (such as coal, oil, gas) and substantially pure oxygen (purity preferably greater that 95%).
  • a fuel such as coal, oil, gas
  • substantially pure oxygen purity preferably greater that 95%).
  • the main component of the flue gas generated in the oxyfired boiler is CO 2 .
  • the flue gas treatment system 1 comprises a recirculation line 10 to supply at least a part of the flue gas generated at the combustion device 2 back to the combustion device 2 .
  • a recirculation line 10 to supply at least a part of the flue gas generated at the combustion device 2 back to the combustion device 2 .
  • 2 ⁇ 3 of the whole flue gas generated at the combustion device 2 are recirculated via the recirculation line 10 and the remaining 1 ⁇ 3 of the flue gas is further treated.
  • a selective catalytic reduction unit SCR Downstream the recirculation line 10 , a selective catalytic reduction unit SCR is provided.
  • the selective catalytic reduction unit SCR operates at a substantially atmospheric pressure.
  • the selective catalytic reduction unit SCR is defined by a bed or a structure of catalyst material through which the gas passes through. Upstream the selective catalytic reduction unit SCR a reducing agent like ammonia or urea is injected into the flue gas. In the selective catalytic reduction unit SCR unit the ammonia or the urea then reacts with the NO x present in the flue gas to form N 2 and H 2 O.
  • the flue gas from the selective catalytic reduction unit SCR is preferably supplied into a heat exchanger 14 to recover heat, and then into a desulphurization unit such as a wet flue gas desulphurization WFGD defined by a absorption column (or a scrubber column, or a scrubber tower), in which typically scrubber liquid is sprayed from the top counter currently to the gas entering at the bottom of the column.
  • a desulphurization unit such as a wet flue gas desulphurization WFGD defined by a absorption column (or a scrubber column, or a scrubber tower), in which typically scrubber liquid is sprayed from the top counter currently to the gas entering at the bottom of the column.
  • a gas processing unit GPU Downstream of the wet flue gas desulphurization WFGD a gas processing unit GPU is provided to separate CO 2 from the other gas of the flue gas.
  • the gas processing unit GPU separates a stream 16 of substantially pure CO 2 from a stream 18 of the remaining components of the flue gas that are mainly defined by Argon, N 2 and are usually vented.
  • the gas processing unit GPU for example comprises a compression step and a cooling step.
  • the recirculation line 10 departs upstream of the selective catalytic reduction unit SCR, and the selective catalytic reduction unit SCR is upstream of the gas processing unit GPU and operates at a substantially atmospheric pressure. Upstream and downstream are to be intended with reference to the flow of flue gas.
  • a heat exchanger 20 is preferably provided between the combustion device 2 and the diverting 19 of the recirculation line 10 . Therefore the heat exchanger 20 is in the loop of the recirculation line 10 .
  • the heat exchanger 20 cools the flue gas upstream of the selective catalytic reduction unit SCR.
  • the heat exchanger 20 is preferably a preheater for an oxidiser such as oxygen to be supplied to the combustion device.
  • a dust removal unit 22 upstream of the selective catalytic reduction unit SCR can also be provided.
  • the temperature of the flue gas at the outlet of the dust removal unit 22 fits the temperature needed at the selective catalytic reduction unit SCR.
  • an additional heat exchanger can be provided to fit the temperature needed at the selective catalytic reduction unit SCR.
  • a fuel is combusted with oxygen generating steam (that is for example expanded in a steam turbine) and flue gas.
  • the flue gas is directed through the preheater 20 where it is cooled (at the same time oxygen directed into the combustion chamber of the combustion device is heated).
  • the cooled flue gas passes then through the dust removal unit 22 (such as an electrostatic precipitator or a filter) where dust and solid particles are removed from it.
  • the flue gas treated this way is split in a first part (about 2 ⁇ 3 of the total flue gas generated at the combustion device 2 ) that is recirculated back into the combustion chamber of the combustion device and a second part (about 1 ⁇ 3 of the total flue gas generated at the combustion device) that is supplied to the selective catalytic reduction unit SCR.
  • the selective catalytic reduction unit SCR can have a size substantially smaller that the selective catalytic reduction unit size needed for traditional flue gas treatment systems.
  • a reducing agent like for example ammonia or urea is injected into the flue gas, such that NO x is converted into N 2 and H 2 O.
  • the injection of the reducing agent occurs upstream of the selective catalytic reduction unit SCR.
  • H 2 O and SO 2 are respectively removed from the flue gas that is thus ready to enter the gas processing unit GPU.
  • the flue gas is compressed and cooled to separate the CO 2 from the other components of the flue gas generating the stream 16 and 18 .

Abstract

An arrangement of a flue gas treatment system and a combustion device includes a recirculation line to supply at least a part of the flue gas from the combustion device back to the combustion device, a selective catalytic reduction unit (SCR), a gas processing unit (GPU) to separate CO2 from the flue gas. The recirculation line departs upstream of the selective catalytic reduction unit (SCR), and the selective catalytic reduction unit (SCR) is upstream of the gas processing unit (GPU).

Description

    CROSS-REFERENCE TO RELATED APPLICATIONS
  • This application claims priority to the following European applications: European application 12190213.4 filed Oct. 26, 2012, European application 13172579.8 filed Jun. 18, 2013, European application 13172576.4 filed Jun. 18, 2013 and European application 13180815.6 filed Aug. 19, 2013, the contents of which are each hereby incorporated in their entireties.
    • TECHNICAL FIELD
  • The present disclosure relates to an arrangement of a flue gas treatment system and a combustion device. The boiler is preferably an oxyfired boiler, i.e. a boiler in which a fuel is combusted using pure or almost pure oxygen as an oxidizing agent.
    • BACKGROUND
  • It is known to provide flue gas treatment systems downstream of boilers.
  • FIG. 1 shows an example of a known flue gas treatment system 1 connected to a combustion device 2 such as a boiler.
  • FIG. 1 shows that the flue gas treatment system 1 has a selective catalytic reduction unit SCR located immediately downstream of the combustion device 2; at the selective catalytic reduction unit SCR NOx is converted into N2 and H2O. Downstream of the selective catalytic reduction unit SCR a pre-heater 4 is provided, to pre-heat the air to be provided to the boiler (namely to the combustion chamber of the boiler). Thus an electrostatic precipitator ESP for removal of particles and a wet flue gas desulphurization WFGD are provided. From the wet flue gas desulphurization WFGD the flue gas is sent to the stack.
  • The known flue gas treatment system has some drawbacks.
  • In fact, since all flue gas has to pass through the selective catalytic reduction unit SCR, the selective catalytic reduction unit SCR must have a large size (i.e. large enough for the whole flue gas).
    • SUMMARY
  • An aspect of the disclosure includes providing an arrangement of a flue gas treatment system and a combustion device by which the selective catalytic reduction unit SCR has a smaller dimension than what needed for known flue gas treatment systems.
  • This also favourably influences the costs that are reduced.
  • These and further aspects are attained by providing an arrangement of a flue gas treatment system and a combustion device in accordance with the accompanying claims.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • Further characteristics and advantages will be more apparent from the description of a preferred but non-exclusive embodiment of the arrangement of the flue gas treatment system and a combustion device, illustrated by way of non-limiting example in the accompanying drawings, in which:
  • FIG. 1 is a schematic view of a flue gas treatment system according to the prior art;
  • FIG. 2 is a schematic view of a flue gas treatment system in an embodiment of the invention.
    •  DETAILED DESCRIPTION
  • With reference to FIG. 2, this shows an arrangement of a flue gas treatment system 1 and a combustion device 2 such as a boiler. The boiler is preferably an oxyfiring boiler, i.e. a boiler having a combustion chamber that is supplied with a fuel (such as coal, oil, gas) and substantially pure oxygen (purity preferably greater that 95%). The main component of the flue gas generated in the oxyfired boiler is CO2.
  • The flue gas treatment system 1 comprises a recirculation line 10 to supply at least a part of the flue gas generated at the combustion device 2 back to the combustion device 2. For example ⅔ of the whole flue gas generated at the combustion device 2 are recirculated via the recirculation line 10 and the remaining ⅓ of the flue gas is further treated.
  • Downstream the recirculation line 10, a selective catalytic reduction unit SCR is provided. The selective catalytic reduction unit SCR operates at a substantially atmospheric pressure.
  • For example, the selective catalytic reduction unit SCR is defined by a bed or a structure of catalyst material through which the gas passes through. Upstream the selective catalytic reduction unit SCR a reducing agent like ammonia or urea is injected into the flue gas. In the selective catalytic reduction unit SCR unit the ammonia or the urea then reacts with the NOx present in the flue gas to form N2 and H2O.
  • The flue gas from the selective catalytic reduction unit SCR is preferably supplied into a heat exchanger 14 to recover heat, and then into a desulphurization unit such as a wet flue gas desulphurization WFGD defined by a absorption column (or a scrubber column, or a scrubber tower), in which typically scrubber liquid is sprayed from the top counter currently to the gas entering at the bottom of the column.
  • Downstream of the wet flue gas desulphurization WFGD a gas processing unit GPU is provided to separate CO2 from the other gas of the flue gas.
  • The gas processing unit GPU separates a stream 16 of substantially pure CO2 from a stream 18 of the remaining components of the flue gas that are mainly defined by Argon, N2 and are usually vented.
  • The gas processing unit GPU for example comprises a compression step and a cooling step.
  • Advantageously, the recirculation line 10 departs upstream of the selective catalytic reduction unit SCR, and the selective catalytic reduction unit SCR is upstream of the gas processing unit GPU and operates at a substantially atmospheric pressure. Upstream and downstream are to be intended with reference to the flow of flue gas.
  • Between the combustion device 2 and the diverting 19 of the recirculation line 10, a heat exchanger 20 is preferably provided. Therefore the heat exchanger 20 is in the loop of the recirculation line 10. The heat exchanger 20 cools the flue gas upstream of the selective catalytic reduction unit SCR.
  • The heat exchanger 20 is preferably a preheater for an oxidiser such as oxygen to be supplied to the combustion device.
  • In addition, a dust removal unit 22 upstream of the selective catalytic reduction unit SCR can also be provided.
  • Advantageously the temperature of the flue gas at the outlet of the dust removal unit 22 fits the temperature needed at the selective catalytic reduction unit SCR. This is anyhow not mandatory and an additional heat exchanger (cooler or heater) can be provided to fit the temperature needed at the selective catalytic reduction unit SCR.
  • The operation of the arrangement is apparent from that described and illustrated and is substantially the following.
  • At the combustion device 2 a fuel is combusted with oxygen generating steam (that is for example expanded in a steam turbine) and flue gas.
  • The flue gas is directed through the preheater 20 where it is cooled (at the same time oxygen directed into the combustion chamber of the combustion device is heated). The cooled flue gas passes then through the dust removal unit 22 (such as an electrostatic precipitator or a filter) where dust and solid particles are removed from it.
  • The flue gas treated this way is split in a first part (about ⅔ of the total flue gas generated at the combustion device 2) that is recirculated back into the combustion chamber of the combustion device and a second part (about ⅓ of the total flue gas generated at the combustion device) that is supplied to the selective catalytic reduction unit SCR.
  • Since the amount of flue gas supplied to the selective catalytic reduction unit SCR is only a fraction of the total flue gas generated at the combustion device, the selective catalytic reduction unit SCR can have a size substantially smaller that the selective catalytic reduction unit size needed for traditional flue gas treatment systems.
  • At the selective catalytic reduction unit SCR a reducing agent like for example ammonia or urea is injected into the flue gas, such that NOx is converted into N2 and H2O. Typically the injection of the reducing agent occurs upstream of the selective catalytic reduction unit SCR. At the heat exchanger 14 and wet flue gas desulphurization H2O and SO2 are respectively removed from the flue gas that is thus ready to enter the gas processing unit GPU.
  • At the gas processing unit GPU the flue gas is compressed and cooled to separate the CO2 from the other components of the flue gas generating the stream 16 and 18.
  • Naturally the features described may be independently provided from one another.
  • In practice the materials used and the dimensions can be chosen at will according to requirements and to the state of the art.

Claims (10)

1. An arrangement of a flue gas treatment system and a combustion device, the flue gas treatment system comprising a recirculation line to supply at least a part of the flue gas from the combustion device back to the combustion device,
a selective catalytic reduction unit (SCR),
wherein
the flue gas treatment system comprises a gas processing unit (GPU) to separate CO2 from the flue gas,
the recirculation line departs upstream of the selective catalytic reduction unit (SCR), and
the selective catalytic reduction unit (SCR) is upstream of the gas processing unit (GPU).
2. The arrangement according to claim 1, further comprising a heat exchanger for cooling the flue gas upstream of the selective catalytic reduction unit (SCR).
3. The arrangement according to claim 2, wherein the heat exchanger is a preheater for an oxidiser to be supplied to the combustion device.
4. The arrangement according to claim 1, further comprising a dust removal unit upstream of the selective catalytic reduction unit (SCR).
5. The arrangement according to claim 4, wherein the temperature of the flue gas at the outlet of the dust removal unit fits the temperature needed at the selective catalytic reduction unit (SCR).
6. The arrangement according to claim 1, further comprising a heat exchanger immediately downstream of the selective catalytic reduction unit (SCR).
7. The arrangement according to claim 1, wherein the gas processing unit (GPU) comprises at least a compressor step and a cooling step.
8. The arrangement according to claim 1, wherein at the selective catalytic reduction unit (SCR) a reducing agent is injected into the flue gas.
9. The arrangement according to claim 8, wherein the injection of the reducing agent occurs upstream of the selective catalytic reduction unit (SCR).
10. The arrangement according to claim 1, wherein the selective catalytic reduction unit (SCR) operates at a substantially atmospheric pressure.
US14/063,286 2012-10-26 2013-10-25 Arrangement of a flue gas treatment system and a combustion device Abandoned US20140120002A1 (en)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
EP12190213.4 2012-10-26
EP12190213.4A EP2724766A1 (en) 2012-10-26 2012-10-26 A method of treating a carbon dioxide rich flue gas and a flue gas treatment system
EP13172576.4 2013-06-18
EP13172579.8A EP2724767B1 (en) 2012-10-26 2013-06-18 A method of treating a carbon dioxide rich flue gas and a flue gas treatment system
EP13172576.4A EP2724769A1 (en) 2012-10-26 2013-06-18 A method of treating a carbon dioxide rich flue gas and a flue gas treatment system
EP13172579.8 2013-06-18
EP13180815.6A EP2724772A1 (en) 2012-10-26 2013-08-19 Arrangement of a flue gas treatment system and a combustion device
EP13180815.6 2013-08-19

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US20140120002A1 true US20140120002A1 (en) 2014-05-01

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US14/063,504 Active 2035-03-22 US10518212B2 (en) 2012-10-26 2013-10-25 Method of treating a carbon dioxide rich flue gas and a flue gas treatment system
US14/063,286 Abandoned US20140120002A1 (en) 2012-10-26 2013-10-25 Arrangement of a flue gas treatment system and a combustion device

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130312858A1 (en) * 2012-05-22 2013-11-28 Mitchell B. Cohen Flow control grid
CN113101776A (en) * 2021-04-29 2021-07-13 江苏永钢集团有限公司 Dust removal device for high-speed wire rod rough and medium rolling
CN114307492A (en) * 2021-12-29 2022-04-12 山东赛马力发电设备有限公司 Generating set exhaust treatment system

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104848249B (en) * 2015-04-01 2017-11-03 上海卫源节能环保科技有限公司 A kind of chain-grate boiler optimizes combustion method
CN105126571A (en) * 2015-09-27 2015-12-09 苏州日臻环保设备有限公司 Wet-type oxidation/composite photochemical combined treatment equipment for waste gas of sewage and treatment method
CN106807193A (en) * 2015-12-02 2017-06-09 昆山市三维换热器有限公司 A kind of flue-gas denitration process system
JP6872388B2 (en) * 2016-05-19 2021-05-19 株式会社日本マイクロニクス How to manufacture a secondary battery
US10155190B2 (en) * 2016-10-20 2018-12-18 General Electric Technology Gmbh System and method for reducing carbon dioxide emissions from a flue gas
CN107469593B (en) * 2017-08-28 2020-10-27 中国天辰工程有限公司 Device and method for treating waste gas in drying and roasting process of silicon-aluminum-phosphorus molecular sieve
DE102017124002A1 (en) * 2017-10-16 2019-04-18 Innogy Se Glycol drying plant and process for glycol drying
AU2018267615B1 (en) * 2018-11-20 2019-05-02 Serendipity Technologies Llc Improvement to furnace apparatus
NL2022304B1 (en) * 2018-12-24 2020-07-21 Host Holding B V Method and system for flue gas treatment
CN109915284A (en) * 2019-03-20 2019-06-21 江苏科技大学 A kind of self-cleaning LNG engine is for exhaust apparatus and working method
US20200340665A1 (en) * 2019-04-29 2020-10-29 Nextwatts, Inc. Building Emission Processing and/or Sequestration Systems and Methods
CN110296392A (en) * 2019-07-09 2019-10-01 重庆富燃科技股份有限公司 A kind of device and method with heat exchange efficiency after regulation porosu solid fuel combustion temperature and increase burning
IT201900013281A1 (en) * 2019-07-30 2021-01-30 Leonardo Spa Process for obtaining carbon dioxide from the combustion fumes of the boilers

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080184880A1 (en) * 2006-10-26 2008-08-07 Foster Wheeler Energy Corporation Method of and apparatus for CO2 capture in oxy-combustion
US7931881B2 (en) * 2009-09-25 2011-04-26 Babcock Power Environmental Inc. Integrated boiler and air pollution control systems
US20120129113A1 (en) * 2010-11-22 2012-05-24 Alstom Technology Ltd. System and method of managing energy utilized in a flue gas processing system

Family Cites Families (56)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4336035A (en) 1979-03-12 1982-06-22 Wheelabrator-Frye Inc. Dust collector and filter bags therefor
JPS60172335A (en) 1984-02-20 1985-09-05 Babcock Hitachi Kk Wet type stack gas desulfurization apparatus
DE3665925D1 (en) 1985-01-30 1989-11-02 Babcock Hitachi Kk Apparatus for treating flue gas
US5078973A (en) * 1985-01-30 1992-01-07 Babcoco-Hitachi Kabushiki Kaisha Apparatus for treating flue gas
JPH069646B2 (en) 1986-02-24 1994-02-09 関西電力株式会社 Exhaust gas treatment method
DE3639112A1 (en) 1986-11-15 1988-05-26 Rheinische Braunkohlenw Ag METHOD FOR REMOVING SO (DOWN ARROW) X (DOWN ARROW) AND NO (DOWN ARROW) X (DOWN ARROW) FROM FLUE GAS
US5057293A (en) 1987-02-13 1991-10-15 Fuel Tech, Inc. Multi-stage process for reducing the concentration of pollutants in an effluent
US5585081A (en) 1988-07-25 1996-12-17 The Babcock & Wilcox Company SOx, NOx and particulate removal system
CN1020416C (en) 1989-08-19 1993-05-05 武汉汽轮发电机厂 Method and equipment for industry smoke comprehensive purifying and dust removing
US4952223A (en) * 1989-08-21 1990-08-28 The Boc Group, Inc. Method and apparatus of producing carbon dioxide in high yields from low concentration carbon dioxide feeds
US4985219A (en) 1990-02-14 1991-01-15 Research-Cottrell, Inc. Removal of nitrogen oxides from waste gases
US5213780A (en) 1991-06-04 1993-05-25 Research-Cottrell, Inc. Method for nitrogen oxide reduction and flue gas reheating
US5362463A (en) 1992-08-26 1994-11-08 University Of De Process for removing NOx from combustion zone gases by adsorption
SE502283C2 (en) 1993-12-03 1995-09-25 Ulf Hagstroem Methods and supply means for regulating mixing conditions in a combustion or gasification plant
TW301701B (en) * 1995-03-30 1997-04-01 Mitsubishi Heavy Ind Ltd
KR100235854B1 (en) * 1995-06-28 1999-12-15 마스다 노부유키 Flue-gas treatment system
US5743929A (en) * 1995-08-23 1998-04-28 The Boc Group, Inc. Process for the production of high purity carbon dioxide
CA2206236C (en) 1996-07-08 2001-10-30 The Boc Group, Inc. Removal of nitrogen oxides from gas streams
US6077491A (en) 1997-03-21 2000-06-20 Ec&C Technologies Methods for the production of ammonia from urea and/or biuret, and uses for NOx and/or particulate matter removal
JP3002452B1 (en) 1998-08-26 2000-01-24 川崎重工業株式会社 High efficiency flue gas denitration system
AU2000227238A1 (en) 2000-01-11 2001-07-24 Goal Line Environmental Technologies Llc Process, catalyst system, and apparatus for treating sulfur compound containing effluent
JP4071414B2 (en) 2000-02-14 2008-04-02 バブコック日立株式会社 Waste incineration equipment
US6935251B2 (en) * 2002-02-15 2005-08-30 American Air Liquide, Inc. Steam-generating combustion system and method for emission control using oxygen enhancement
US20040033184A1 (en) 2002-08-15 2004-02-19 Ernest Greer Removing carbon from fly ash
SE525344C2 (en) 2003-06-26 2005-02-08 Alstom Technology Ltd Methods and apparatus for separating sulfur dioxide from a gas
US7438876B2 (en) 2003-12-02 2008-10-21 Cichanowicz J Edward Multi-stage heat absorbing reactor and process for SCR of NOx and for oxidation of elemental mercury
US7500437B2 (en) 2004-08-27 2009-03-10 Neuco, Inc. Method and system for SCR optimization
US7393511B2 (en) 2005-02-16 2008-07-01 Basf Catalysts Llc Ammonia oxidation catalyst for the coal fired utilities
FR2891609B1 (en) * 2005-10-04 2007-11-23 Inst Francais Du Petrole OXY-COMBUSTION PROCESS FOR CAPTURING THE ENTIRE CARBON DIOXIDE PRODUCT
US7416716B2 (en) * 2005-11-28 2008-08-26 Air Products And Chemicals, Inc. Purification of carbon dioxide
JP4731293B2 (en) * 2005-11-28 2011-07-20 電源開発株式会社 Combustion control method and apparatus for oxyfuel boiler
US7909898B2 (en) 2006-02-01 2011-03-22 Air Products And Chemicals, Inc. Method of treating a gaseous mixture comprising hydrogen and carbon dioxide
US7871457B2 (en) * 2006-04-03 2011-01-18 Praxair Technology, Inc. Carbon dioxide production method
US20080282889A1 (en) 2007-05-17 2008-11-20 Battelle Energy Alliance, Llc Oil shale based method and apparatus for emission reduction in gas streams
US7708804B2 (en) 2007-07-11 2010-05-04 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process and apparatus for the separation of a gaseous mixture
ITRM20070446A1 (en) 2007-08-20 2009-02-21 Ast Engineering S R L MODULAR PLANT FOR FELLING THE POLLUTANTS CONTAINED IN INDUSTRIAL FUMES
US20090121191A1 (en) * 2007-11-14 2009-05-14 Texyn Hydrocarbon, Llc System and method for high pressure synthesis gas processing
DE102008009129A1 (en) * 2008-02-14 2009-08-20 Hitachi Power Europe Gmbh Coal-fired power plant and method of operation of the coal-fired power plant
US8535417B2 (en) * 2008-07-29 2013-09-17 Praxair Technology, Inc. Recovery of carbon dioxide from flue gas
CA2731813A1 (en) * 2008-07-29 2009-11-05 Union Engineering A/S A method for recovery of high purity carbon dioxide
EP2156878A1 (en) 2008-08-12 2010-02-24 BP Alternative Energy International Limited Scrubbing system
US7927573B2 (en) 2008-09-26 2011-04-19 Praxair Technology, Inc. Multi-stage process for purifying carbon dioxide and producing acid
CN101439260B (en) 2008-12-04 2013-06-12 浙江大学 System for removing nitrous oxides in low-temperature flue gas and technique thereof
DE102008062496A1 (en) 2008-12-16 2010-06-17 Linde-Kca-Dresden Gmbh Process for the removal of impurities from oxygen-containing gas streams
DE102008062495A1 (en) * 2008-12-16 2010-06-17 Linde-Kca-Dresden Gmbh Process and apparatus for catalytic denitrification of gas streams from large combustion plant
US20100284892A1 (en) * 2009-05-06 2010-11-11 American Air Liquide, Inc. Process For The Purification Of A Carbon Dioxide Stream With Heating Value And Use Of This Process In Hydrogen Producing Processes
JP5093205B2 (en) * 2009-09-30 2012-12-12 株式会社日立製作所 Carbon dioxide recovery type power generation system
US8486361B2 (en) * 2010-03-11 2013-07-16 Alstom Technology Ltd System and method for generating a carbon dioxide stream
US8110164B2 (en) 2010-06-23 2012-02-07 Baoquan Zhang Flue-Gas purification and reclamation system and method thereof
US8197778B2 (en) * 2010-07-08 2012-06-12 Air Products And Chemicals, Inc. Handling of acids from compressed oxyfuel-derived CO2
US8323602B2 (en) * 2010-07-08 2012-12-04 Air Products And Chemicals, Inc. Treatment of flue gas from an oxyfuel combustion process
JP5709438B2 (en) * 2010-08-30 2015-04-30 三菱日立パワーシステムズ株式会社 Exhaust gas treatment equipment
ES2593812T3 (en) 2010-11-24 2016-12-13 General Electric Technology Gmbh Method of purifying a combustion gas rich in carbon dioxide and a boiler system
ES2551865T3 (en) * 2011-02-01 2015-11-24 Alstom Technology Ltd Apparatus and system for NOx reduction in wet combustion gas
JP5780244B2 (en) * 2011-02-08 2015-09-16 株式会社Ihi Oxygen combustion equipment exhaust gas treatment system
CN102343201A (en) * 2011-10-11 2012-02-08 南京大学 Process for removing acid gas from flue gas by using residual heat of flue gas

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080184880A1 (en) * 2006-10-26 2008-08-07 Foster Wheeler Energy Corporation Method of and apparatus for CO2 capture in oxy-combustion
US7931881B2 (en) * 2009-09-25 2011-04-26 Babcock Power Environmental Inc. Integrated boiler and air pollution control systems
US20120129113A1 (en) * 2010-11-22 2012-05-24 Alstom Technology Ltd. System and method of managing energy utilized in a flue gas processing system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130312858A1 (en) * 2012-05-22 2013-11-28 Mitchell B. Cohen Flow control grid
US9409124B2 (en) * 2012-05-22 2016-08-09 Alstom Technology Ltd Flow control grid
CN113101776A (en) * 2021-04-29 2021-07-13 江苏永钢集团有限公司 Dust removal device for high-speed wire rod rough and medium rolling
CN114307492A (en) * 2021-12-29 2022-04-12 山东赛马力发电设备有限公司 Generating set exhaust treatment system

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US10518212B2 (en) 2019-12-31

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