WO2012120417A1 - Method of and apparatus for selective catalytic nox reduction in a power boiler - Google Patents
Method of and apparatus for selective catalytic nox reduction in a power boiler Download PDFInfo
- Publication number
- WO2012120417A1 WO2012120417A1 PCT/IB2012/050988 IB2012050988W WO2012120417A1 WO 2012120417 A1 WO2012120417 A1 WO 2012120417A1 IB 2012050988 W IB2012050988 W IB 2012050988W WO 2012120417 A1 WO2012120417 A1 WO 2012120417A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- flue gas
- air heater
- air
- νοχ
- catalyst
- Prior art date
Links
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
-
- 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
- B01D53/8631—Processes characterised by a specific device
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K3/00—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
- F01K3/18—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having heaters
- F01K3/24—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having heaters with heating by separately-fired heaters
- F01K3/247—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having heaters with heating by separately-fired heaters one heater being an incinerator
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
- F22B1/1869—Hot gas water tube boilers not provided for in F22B1/1807 - F22B1/1861
- F22B1/1876—Hot gas water tube boilers not provided for in F22B1/1807 - F22B1/1861 the hot gas being loaded with particles, e.g. dust
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/008—Adaptations for flue gas purification in steam generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/006—Layout of treatment plant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
- F23L15/04—Arrangements of recuperators
- F23L15/045—Arrangements of recuperators using intermediate heat-transfer fluids
-
- 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
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20707—Titanium
-
- 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
- B01D2255/20738—Iron
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2215/00—Preventing emissions
- F23J2215/10—Nitrogen; Compounds thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2219/00—Treatment devices
- F23J2219/10—Catalytic reduction devices
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/12—Heat utilisation in combustion or incineration of waste
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Definitions
- the present invention relates to a method of and a system for selective catalytic NO x reduction (SCR) in a solid or a liquid hydrocarbon fuel firing power boiler. More particularly, the present invention relates to controlling the temperature of a flue gas entering an NO x catalyst of the boiler.
- SCR selective catalytic NO x reduction
- Oxides of nitrogen also known as ⁇ , contribute to the generation of acid rain and smog. Due to environmental regulations demanding that ⁇ emissions be maintained at acceptable levels, the reduction of ⁇ both during and after the combustion process is of a major concern in the design and operation of modern power plants.
- Oxides of nitrogen are a byproduct of the combustion of solid and liquid hydrocarbon fuels, such as pulverized coal or oil, and are found in two main forms. If the nitrogen originates from the combustion air, the ⁇ is referred to as "thermal ⁇ ". Thermal ⁇ forms when molecular nitrogen (N 2 ) is subjected to temperatures above about 1500°C causing it to break down into elemental nitrogen (N), which can then combine with elemental or molecular oxygen to form NO or N0 2 . If the nitrogen originates from organically bound nitrogen in the fuel, the ⁇ is referred to as "fuel ⁇ ”.
- SCR selective catalytic reduction
- a reductant typically, gaseous ammonia
- NO x is approximately ninety- five percent NO
- the ideal operating temperature range for SCR is generally from about 300 to about 400°C.
- When operating conditions fall much below 300°C the potential for ammonium bisulfate formation and sulfur trioxide deposits on the catalyst surface increases. This can cause permanent catalyst activity loss. Above 400°C, ammonia may dissociate, reducing the effectiveness of the process. If temperatures exceed about 450°C, the catalyst activity might be permanently impaired due to sintering.
- a typical power boiler utilizing SCR as an NO x reduction technique comprises a furnace in fluid communication with a flue gas channel. Combustion of hydrocarbon fuels occurs in the furnace generating hot flue gases that rise within the furnace, giving up a portion of their energy to generate steam in the evaporator surfaces at the walls of the furnace. The flue gases are then directed through a heat recovery area (HRA) of the flue gas channel, wherein they give up additional energy to superheat the steam and to heat feed water in the economizer surfaces. Flue gases exiting the economizer section are directed through an ⁇ catalyst, an air preheater and possible flue gas cleaning systems, and finally, via a stack to the atmosphere.
- HRA heat recovery area
- a reactant such as gaseous ammonia or a solution of urea in water
- a reactant such as gaseous ammonia or a solution of urea in water
- the catalyst typically includes multiple layers of solid catalytic material lying within the path of the flue gas stream.
- the most common types of catalytic material in use and the approximate temperature ranges of the flue gas over which they are effective as catalysts are: titanium dioxide (270-400°C), zeolite (300-430°C), iron oxide (380-430°C) and activated coal/coke (100-150°C).
- U.S. Patent No. 5,555,849 discloses a fossil fuel power plant with an economizer system upstream of an ⁇ catalyst, wherein the economizer system comprises a water-side bypass line in order to maintain a desired flue gas temperature in the ⁇ catalyst even at low load conditions.
- European patent publication EP 0 753 701 Al discloses a boiler with an ⁇ catalyst disposed in the flue gas channel between two economizers and having a flue gas bypass channel for the economizer upstream of the ⁇ catalyst.
- U.S. Patent No. 6,405,791 discloses a tubular air heater with an inlet plenum which permits retrofit installation of a selective catalytic reduction (SCR) system upstream of the air heater in an existing boiler.
- SCR selective catalytic reduction
- An object of the present invention is to provide a method of selective catalytic
- Another object of the present invention is to provide an apparatus for selective catalytic ⁇ reduction in a power boiler by which problems of the prior art described above can be minimized.
- the present invention provides a method of selective catalytic ⁇ reduction in a power boiler, the method comprising the steps of (a) combusting fuel in a furnace of the boiler and generating a flue gas stream that includes ⁇ , (b) conducting the flue gas stream from the furnace along a flue gas channel to a stack, (c) cooling the flue gas stream in a heat recovery area, including an economizer section, arranged in the flue gas channel, (d) reducing at least a portion of the ⁇ to N 2 in an ⁇ catalyst arranged in the flue gas channel downstream of the economizer section, and (e) further cooling the flue gas and generating heated air in a gas-to-air heater arranged in the flue gas channel downstream of the economizer section and upstream of the ⁇ catalyst.
- the present invention provides a power boiler, with selective catalytic ⁇ reduction, the boiler including (a) a combustor for combusting fuel in a furnace of the boiler so as to generate a flue gas stream including ⁇ , (b) a flue gas channel for conducting the flue gas stream from the furnace to a stack, (c) a heat recovery area, including an economizer section, arranged in the flue gas channel for cooling the flue gas stream, (d) an NO x catalyst arranged in the flue gas channel downstream of the economizer section for reducing at least a portion of the ⁇ to N 2 , and (e) a gas-to-air heater arranged in the flue gas channel downstream of the economizer section and upstream of the ⁇ catalyst for further cooling the flue gas and for generating heated air.
- the boiler including (a) a combustor for combusting fuel in a furnace of the boiler so as to generate a flue gas stream including ⁇ , (b) a flue gas
- the present invention i.e., the arranging of a gas-to-air heater upstream of the
- the gas-to-air heater is preferably a tubular air heater, but may, in some cases, also be of other types of heat exchangers that transfer heat from the flue gas to combustion air of the boiler. According to another preferred embodiment of the present invention, the gas-to-air heater is a heat exchanger with a recirculating heat transfer fluid.
- the gas-to-air heater may, in some applications, alternatively be of another suitable type, for example, a heat pipe.
- the power boiler comprises a burner, or, in practice, a set of burners, for combusting the fuel carried to the burners by a stream of primary air.
- the combustion air heated in the gas-to-air heater is conducted as secondary air to the burners. Due to the use of the secondary air as the cooling medium, the method does not have a risk of overheating the cooling medium, as the case may be when using feed water as the cooling medium. Moreover, because the heat transferred to the secondary air can be fully recovered in the boiler, the method does not affect the operation or efficiency of the existing boiler.
- the combustion air heated in the gas- to-air heater can also alternatively be of other types of combustion air, for example, primary air, to be conducted to the furnace.
- the flow of air through the gas-to-air heater can be modulated, or shut off, to maintain a desired temperature of the flue gas entering into the catalyst.
- the flow of air can thus advantageously be controlled directly on the basis of the load conditions of the boiler, or on the basis of a measured temperature of the flue gas entering the ⁇ catalyst.
- the present invention provides a simple method to provide optimized operation of the catalyst in different load conditions, without, for example, a need to provide an economizer with a flue gas by-pass, or water side by-pass, for low load operation.
- the present invention thus provides a wide range of temperature control, without requiring any change in the flue gas or steam/water circuitry of the boiler.
- the invention is thus especially useful in retrofit applications, but it can be applied in new units as well, for example, to control the temperature of the flue gas entering the ⁇ catalyst.
- FIG. 1 is a schematic diagram of an exemplary power boiler in accordance with the present invention.
- FIG. 2 shows a portion of a flue gas channel of a power boiler according to another embodiment of the present invention.
- FIG. 1 is a schematic diagram of a pulverized coal combusting power boiler
- the boiler comprises a furnace 12 with a burner 14 for injecting a mixture of pulverized coal 16 and primary air 18 from a coal mill 20 to the furnace.
- a power boiler comprises multiple burners but, for the sake of simplicity, only one burner is shown in FIG. 1.
- the fuel is combusted in the furnace with the primary air and secondary air 22, injected to the furnace via a windbox 24 adjacent to the burner, and hot flue gas is generated.
- the combustion may in practice be completed by tertiary air and/or overfire air injected in the furnace downstream of the burners, but, for the sake of simplicity, injection of tertiary air and/or overfire air is not shown in FIG. 1.
- the flue gases are then directed through a heat recovery area (HRA) 34 of the flue gas channel, wherein they give up additional energy in superheater surfaces 36 to superheat the evaporated steam and in economizer surfaces 38, to preheat feed water to be fed to the evaporator surfaces.
- HRA heat recovery area
- the HRA comprises multiple superheater and reheater surfaces, but because they are not important for the present invention, only one superheater 36 is shown in FIG. 1.
- Flue gases exiting the economizer 38 are directed through an ⁇ catalyst 40, an air preheater 42, a flue gas cleaning system 44, and a stack 46 to the atmosphere.
- the flue gas channel 32 also comprises an injector 48 for injecting NO x reductant, such as ammonia, upstream of the catalyst 40.
- the catalyst 40 preferably comprises conventional catalyst material, such as titanium oxide or iron oxide.
- the flue gas cleaning system comprises several flue gas cleaning units, such as a dust separator and a desulfurizer, but because they are not important for the present invention, only one schematic gas cleaning system 44 is shown in FIG. 1.
- the flue gas channel comprises a gas-to-air heater, in this case, a tubular air heater 50, arranged upstream of the ⁇ catalyst 40.
- a gas-to-air heater in this case, a tubular air heater 50, arranged upstream of the ⁇ catalyst 40.
- the tubular air heater 50 is advantageously connected so as to render possible additional heating of the secondary air 22.
- the tubular air heater 50 is connected in parallel with the air heater 42, which is here also called a second air heater, arranged in the flue gas channel 32 downstream of the ⁇ catalyst 40.
- the stream of secondary air from the secondary air blower 52 can be divided, by using control devices, such as control valves 54, 54', between the tubular air heater 50 and the air heater 42 downstream of the catalyst 40.
- the ratio of the air flows through the tubular air heater 50 and the air heater 42 downstream of the catalyst 40 can advantageously be determined on the basis of the boiler load, or on the basis of the flue gas temperature upstream of the catalyst, as measured by a temperature measuring device, such as a thermometer 56.
- the system advantageously comprises a controller 58 for controlling the control valves 54, 54' on the basis of the measured temperature.
- FIG.2 shows a portion of the flue gas channel 32 of a power boiler according to another embodiment of the present invention.
- a gas-to-air heater 50N is arranged in the flue gas channel upstream of a catalyst section 40 and a conventional air heater 42 is arranged downstream of the catalyst section 40.
- the gas-to-air heater 50N comprises a flue gas cooler 60 in the flue gas channel 32 and a separate air heater 62 in a branch 64 of an air feeding line 66.
- the flue gas cooler 60 and the air heater 62 are connected by a pipe 68 for circulating a heat transfer fluid with a pump 70.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013555983A JP2014514134A (en) | 2011-03-04 | 2012-03-02 | Selective catalyst NOX reduction method and apparatus in power generation boiler |
CN2012800116562A CN103443405A (en) | 2011-03-04 | 2012-03-02 | Method of and apparatus for selective catalytic NOx reduction in a power boiler |
RU2013144552/06A RU2543096C1 (en) | 2011-03-04 | 2012-03-02 | METHOD AND DEVICE FOR SELECTIVE CATALYTIC REDUCTION OF NOx IN POWER BOILER |
KR1020137024364A KR20130114747A (en) | 2011-03-04 | 2012-03-02 | Method of and apparatus for selective catalytic nox reduction in a power boiler |
EP12712360.2A EP2686524A1 (en) | 2011-03-04 | 2012-03-02 | Method of and apparatus for selective catalytic nox reduction in a power boiler |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/040,666 US20120222591A1 (en) | 2011-03-04 | 2011-03-04 | Method of and Apparatus for Selective Catalytic NOx Reduction in a Power Boiler |
US13/040,666 | 2011-03-04 | ||
US13/182,763 US20120160142A1 (en) | 2011-03-04 | 2011-07-14 | Method of and Apparatus for Selective Catalytic NOx Reduction in a Power Boiler |
US13/182,763 | 2011-07-14 |
Publications (1)
Publication Number | Publication Date |
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WO2012120417A1 true WO2012120417A1 (en) | 2012-09-13 |
Family
ID=46315155
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/IB2012/050988 WO2012120417A1 (en) | 2011-03-04 | 2012-03-02 | Method of and apparatus for selective catalytic nox reduction in a power boiler |
Country Status (7)
Country | Link |
---|---|
US (2) | US20120222591A1 (en) |
EP (1) | EP2686524A1 (en) |
JP (1) | JP2014514134A (en) |
KR (1) | KR20130114747A (en) |
CN (1) | CN103443405A (en) |
RU (1) | RU2543096C1 (en) |
WO (1) | WO2012120417A1 (en) |
Cited By (1)
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US11850550B2 (en) | 2019-12-18 | 2023-12-26 | Sumitomo SHI FW Energia Oy | Arrangement for and a method of operating a steam boiler system |
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US9482127B2 (en) * | 2012-09-11 | 2016-11-01 | General Electric Technology Gmbh | Booster air heater for high moisture fuels |
WO2014063249A1 (en) * | 2012-10-24 | 2014-05-01 | Maralto Environmental Technologies Ltd. | Heat exchanger and method for heating a fracturing fluid |
JP5624646B1 (en) * | 2013-05-23 | 2014-11-12 | 電源開発株式会社 | Thermal power plant and operation method of thermal power plant. |
EP2851616A1 (en) | 2013-09-19 | 2015-03-25 | Alstom Technology Ltd | Flue gas heat recovery integration |
CN103877856B (en) * | 2014-03-27 | 2016-01-06 | 中冶焦耐工程技术有限公司 | A kind of method of coke oven flue waste gas heat utilization and purification |
DE102014004778A1 (en) * | 2014-04-01 | 2015-10-01 | Linde Aktiengesellschaft | Oxygen / air-fuel burning system and method for preheating combustion components |
CN104190253A (en) * | 2014-08-25 | 2014-12-10 | 上海宝钢节能环保技术有限公司 | Coke oven flue gas SCR denitration system |
WO2017222744A1 (en) * | 2016-06-20 | 2017-12-28 | Exxonmobil Research And Engineering Company | Fired heater with heat pipe preheater |
CN107152672A (en) * | 2017-05-05 | 2017-09-12 | 张家港格林沙洲锅炉有限公司 | Low NOXDouble drum gas fired-boilers |
CN109114582B (en) * | 2018-08-28 | 2019-07-19 | 北京华通兴远供热节能技术有限公司 | Gas fired-boiler fume afterheat, which is utilized, removes system and method with white haze |
CN110686266B (en) * | 2019-09-18 | 2021-09-21 | 国能龙源环保有限公司 | Flue gas temperature raising system capable of realizing low-load operation of SCR (Selective catalytic reduction) denitration system and method thereof |
CN111043620A (en) * | 2019-11-19 | 2020-04-21 | 华电电力科学研究院有限公司 | System and method for realizing SCR full-time denitration of coal-fired thermal power generating unit |
CN111636934B (en) * | 2020-05-24 | 2021-03-16 | 西安交通大学 | Efficient and clean coal-fired power generation system with high variable load rate and operation method |
CN115374632B (en) * | 2022-08-19 | 2024-01-26 | 南方电网电力科技股份有限公司 | Calculation method and related device for outlet flue gas in SNCR (selective non-catalytic reduction) denitration system |
WO2024054543A1 (en) | 2022-09-08 | 2024-03-14 | Lummus Technology Llc | Selective catalytic reduction catalyst module support system and installation method |
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- 2012-03-02 WO PCT/IB2012/050988 patent/WO2012120417A1/en active Application Filing
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Also Published As
Publication number | Publication date |
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RU2543096C1 (en) | 2015-02-27 |
CN103443405A (en) | 2013-12-11 |
KR20130114747A (en) | 2013-10-17 |
JP2014514134A (en) | 2014-06-19 |
US20120222591A1 (en) | 2012-09-06 |
EP2686524A1 (en) | 2014-01-22 |
US20120160142A1 (en) | 2012-06-28 |
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