CN107152673A - A kind of device for improving coal-fired electric generation furnace denitration inlet flue gas temperature - Google Patents
A kind of device for improving coal-fired electric generation furnace denitration inlet flue gas temperature Download PDFInfo
- Publication number
- CN107152673A CN107152673A CN201710416684.7A CN201710416684A CN107152673A CN 107152673 A CN107152673 A CN 107152673A CN 201710416684 A CN201710416684 A CN 201710416684A CN 107152673 A CN107152673 A CN 107152673A
- Authority
- CN
- China
- Prior art keywords
- flue gas
- flue
- economizer
- gas temperature
- electric generation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 239000003546 flue gas Substances 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000003245 coal Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 8
- 235000019504 cigarettes Nutrition 0.000 description 5
- 229910021529 ammonia Inorganic materials 0.000 description 4
- 238000006722 reduction reaction Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- BIGPRXCJEDHCLP-UHFFFAOYSA-N ammonium bisulfate Chemical compound [NH4+].OS([O-])(=O)=O BIGPRXCJEDHCLP-UHFFFAOYSA-N 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000008398 formation water Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
- F22B31/08—Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J11/00—Devices for conducting smoke or fumes, e.g. flues
-
- 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
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention discloses a kind of device for improving coal-fired electric generation furnace denitration inlet flue gas temperature, including one-level economizer, two grades of economizers, flue, water supply structure and drum, one-level economizer and two grades of economizers are separately positioned on the two ends of flue, drum is arranged on one-level economizer, water supply structure is respectively connected with one-level economizer and two grades of economizers, the middle part of flue is provided with SCR reactors.Original economizer is transformed into two-stage economizer, the heat exchange that flue gas flows through one-level economizer is reduced, denitration inlet flue gas temperature is lifted, then after denitration, flows through two grades of economizers, so as to reach reduction heat loss due to exhaust gas, unit economy is improved.
Description
Technical field
The present invention relates to thermal power generating technology field, it particularly relates to which a kind of improve coal-fired electric generation furnace denitration entrance
The device of cigarette temperature.
Background technology
With development of modern industry, with environmental pollution it is serious all the more, country to environmental protection of enterprise qualified discharge also therewith by
Step upgrading, in modern firepower coal-fired electric generation furnace technical elements, denitration qualified discharge has been popularized in an all-round way, it is desirable to thermal power generation unit
Denitration transformation is carried out, the discharge capacity of nitride is reduced.By taking Fa Er power plant 4*600MW units as an example, the unit is transformed by denitration
Afterwards, make emitting nitride up to standard, but after transformation, the problem of generating many new in terms of unit safety stable operation, wherein maximum
When problem is exactly performing low-load running of machine set, because denitration inlet flue gas temperature is relatively low, SCR system catalyst hydraulic performance decline, NOx reproducibilities
It can decline, it is up to standard for control NOx emission, it can only just take increasing ammonia spraying amount to participate in NOx reduction reactions, so as to reduce NOx emission
Value, the consequence brought is exactly that ammonia crosses spray, due to containing sulphur content in fire coal boiler fume, and a large amount of ammonias will react with SO2 gives birth to
Into hydrogen sulfate ammonia, hydrogen sulfate ammonia has very strong adhesiveness and certain corrosivity, so as to largely stick to air preheater accumulation of heat face
On, cause air preheater to block serious, long operational time serious threat unit on-load ability and unit safety.
The content of the invention
In view of this, it is an object of the invention to provide a kind of device for improving coal-fired electric generation furnace denitration inlet flue gas temperature, with
Solve the technical problem for causing ammonia to cross spray and presence during performing low-load running of machine set because denitration inlet flue gas temperature is relatively low.
The present invention solves above-mentioned technical problem by the following technical programs：
A kind of device for improving coal-fired electric generation furnace denitration inlet flue gas temperature, including one-level economizer, two grades of economizers, cigarettes
Road, SCR reactors, water supply structure and drum, one-level economizer and two grades of economizers are separately positioned on the two ends of flue, drum
It is arranged on one-level economizer, is respectively connected with water supply structure on one-level economizer and two grades of economizers, the middle part of flue is set
There are SCR reactors.
The flue uses guard board structure.
The flue is " S " type structure.
Circulating pump is provided between the drum water side and economizer.
Flow control valve is provided with the flue.
The cross-sectional area of the flue is tapered into from one-level economizer to two grades of economizer directions.
The beneficial effects of the present invention are：Original economizer is transformed into two-stage economizer, flue gas is reduced and flows through one-level province
The heat exchange of coal device, lifts denitration inlet flue gas temperature, then after denitration, flows through two grades of economizers, so as to reach reduction exhaust gas heat loss
Lose, improve unit economy.
Brief description of the drawings
Fig. 1 is front view of the invention.
In figure：1~drum；2~one-level economizer；3~flue；4~SCR reactors；5~bis- grades of economizers；6~feedwater
Structure.
Embodiment
In order to facilitate the understanding of those skilled in the art, being done further to the present invention below in conjunction with embodiment and accompanying drawing
Description.Embodiment is only to the invention for example, not being not make what is illustrated in limitation of the invention, embodiment
Step is prior art, is not described in detail herein.
Embodiment one
A kind of device for improving coal-fired electric generation furnace denitration inlet flue gas temperature, as shown in figure 1, including one-level economizer 2, SCR
Reactor 4, two grades of economizers 5, flue 3, water supply structure 6 and drum 1, one-level economizer 2 and two grades of economizers 5 are respectively mounted
At the two ends of flue 3, the middle part of flue 3 is provided with SCR reactors 4, and drum 1 is connected to one-level economizer 2 by connecting tube
On, it is respectively connected with water supply structure 6 on one-level economizer 2 and two grades of economizers 5.
The flue 3 uses guard board structure, and flue 3 is " S " type structure.
Flow control valve is provided with the flue 3, the stream of flue gas passed through in flue 3 is controlled by flow control valve
Amount.
Circulating pump is provided between the water side of drum 1 and one-level economizer 2.Drum 1 with and one-level economizer 2 it
Between circulating pump is installed, in boiler running process, saturation water by circulating pump beat to one-level economizer 2 and drum 1 formation water
Circulation, makes drum saturation water be absorbed heat in one-level economizer 2, so as to control the temperature of one-level economizer 2.
The cross-sectional area of the flue 3 is tapered into from one-level economizer 2 to two grades of directions of economizer 5.Make flue gas in cigarette
The pressure being subject in the flow process of road 3 gradually increases, and flow velocity is accelerated, it is to avoid natural subsidence dust stratification, it is ensured that flue is unimpeded, effectively keeps away
Exempt from the unplanned outage of boiler, improve boiler operating efficiency.
By taking Fa Er power plant as an example, during firepower coal-fired electric generation furnace unit load 300MW, when environment temperature is slightly lower, denitration enters
Temperature only has 305 DEG C or so after mouth cigarette temperature exchanges heat through economizer, and SCR system is transported to the requirement of cigarette temperature in the range of 315-400 DEG C
OK, at 315-400 DEG C the catalytic effect of catalyst preferably, otherwise temperature is relatively low that ammonia can be caused to cross spray.The present invention be exactly
Ensure unit economy simultaneously, it is ensured that denitration stable operation, original economizer is transformed into two-stage economizer, reduce flue gas and flow through
The heat exchange of one-level economizer 2, lifts denitration inlet flue gas temperature, then after denitration, flows through two grades of economizers 5, so as to reach reduction
Heat loss due to exhaust gas, improves unit economy.
It is described above, only it is the preferable example of the present invention, any formal limitation not is made to the present invention, it is any not take off
From technical solution of the present invention content, any simple modification made according to technical spirit of the invention to above example, conversion material
Equivalent variations and modification are expected, in the range of still falling within technical solution of the present invention.
Claims (6)
1. a kind of device for improving coal-fired electric generation furnace denitration inlet flue gas temperature, it is characterised in that：Including one-level economizer (2), SCR
Reactor (4), two grades of economizers (5), flue (3), water supply structure (6) and drum (1), one-level economizer (2) and two grades of provinces
Coal device (5) is separately positioned on the two ends of flue (3), and drum (1) is arranged on one-level economizer (2), one-level economizer (2) and two
Water supply structure (6) is respectively connected with level economizer (5), the middle part of flue (3) is provided with SCR reactors (4).
2. the device of coal-fired electric generation furnace denitration inlet flue gas temperature is improved as claimed in claim 1, it is characterised in that：The flue
(3) guard board structure is used.
3. the device of coal-fired electric generation furnace denitration inlet flue gas temperature is improved as claimed in claim 1, it is characterised in that：The flue
(3) it is " S " type structure.
4. the device of coal-fired electric generation furnace denitration inlet flue gas temperature is improved as claimed in claim 1, it is characterised in that：The drum
(1) it is provided with circulating pump between water side and one-level economizer (2).
5. the device of coal-fired electric generation furnace denitration inlet flue gas temperature is improved as claimed in claim 1, it is characterised in that：The flue
(3) flow control valve is provided with.
6. the device of the raising coal-fired electric generation furnace denitration inlet flue gas temperature as described in claim 1,2,3 or 5, it is characterised in that：
The cross-sectional area of the flue (3) is tapered into from one-level economizer (2) to two grades of economizer (5) directions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710416684.7A CN107152673A (en) | 2017-06-06 | 2017-06-06 | A kind of device for improving coal-fired electric generation furnace denitration inlet flue gas temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710416684.7A CN107152673A (en) | 2017-06-06 | 2017-06-06 | A kind of device for improving coal-fired electric generation furnace denitration inlet flue gas temperature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107152673A true CN107152673A (en) | 2017-09-12 |
Family
ID=59794834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710416684.7A Pending CN107152673A (en) | 2017-06-06 | 2017-06-06 | A kind of device for improving coal-fired electric generation furnace denitration inlet flue gas temperature |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107152673A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115371074A (en) * | 2022-08-29 | 2022-11-22 | 西安热工研究院有限公司 | System for utilize fused salt heat-retaining-heat transfer to promote low-load denitration entry gas temperature |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102338470A (en) * | 2011-08-29 | 2012-02-01 | 上海新业锅炉高科技有限公司 | Novel structure of convection heating surface of corner tube hot-water boiler |
| CN103084064A (en) * | 2013-01-18 | 2013-05-08 | 广东电网公司电力科学研究院 | System and method for improving operation capacity of SCR (Silicon Controlled Rectifier) denitration device in electric power plant |
| CN103846007A (en) * | 2014-03-17 | 2014-06-11 | 山西新唐工程设计有限公司 | Denitration control method of flue-gas selective catalytic reduction device |
| WO2014110882A1 (en) * | 2013-01-18 | 2014-07-24 | 北京神雾环境能源科技集团股份有限公司 | Powdered solid fuel boiler equipped with regenerative rotating commutating heater |
| CN104534492A (en) * | 2014-12-25 | 2015-04-22 | 哈尔滨锅炉厂有限责任公司 | Device and method for increasing denitration inlet gas temperature |
| CN204768271U (en) * | 2015-06-10 | 2015-11-18 | 浙江菲达脱硫工程有限公司 | Boiler SCR denitrification facility of economizer and air preheater doublestage staggered arrangement |
| CN105222114A (en) * | 2015-10-27 | 2016-01-06 | 哈尔滨电站设备成套设计研究所有限公司 | The low NO of economizer sectional boiler full load xdevice and remodeling method |
| CN106362590A (en) * | 2016-11-03 | 2017-02-01 | 广东电网有限责任公司电力科学研究院 | Flue gas system and method for raising fume temperature of inlet of SCR (Selective Catalytic Reduction) denitration device |
| CN206944117U (en) * | 2017-06-06 | 2018-01-30 | 大唐贵州发耳发电有限公司 | A kind of structure for improving coal-fired electric generation furnace denitration inlet flue gas temperature |
-
2017
- 2017-06-06 CN CN201710416684.7A patent/CN107152673A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102338470A (en) * | 2011-08-29 | 2012-02-01 | 上海新业锅炉高科技有限公司 | Novel structure of convection heating surface of corner tube hot-water boiler |
| CN103084064A (en) * | 2013-01-18 | 2013-05-08 | 广东电网公司电力科学研究院 | System and method for improving operation capacity of SCR (Silicon Controlled Rectifier) denitration device in electric power plant |
| WO2014110882A1 (en) * | 2013-01-18 | 2014-07-24 | 北京神雾环境能源科技集团股份有限公司 | Powdered solid fuel boiler equipped with regenerative rotating commutating heater |
| CN103846007A (en) * | 2014-03-17 | 2014-06-11 | 山西新唐工程设计有限公司 | Denitration control method of flue-gas selective catalytic reduction device |
| CN104534492A (en) * | 2014-12-25 | 2015-04-22 | 哈尔滨锅炉厂有限责任公司 | Device and method for increasing denitration inlet gas temperature |
| CN204768271U (en) * | 2015-06-10 | 2015-11-18 | 浙江菲达脱硫工程有限公司 | Boiler SCR denitrification facility of economizer and air preheater doublestage staggered arrangement |
| CN105222114A (en) * | 2015-10-27 | 2016-01-06 | 哈尔滨电站设备成套设计研究所有限公司 | The low NO of economizer sectional boiler full load xdevice and remodeling method |
| CN106362590A (en) * | 2016-11-03 | 2017-02-01 | 广东电网有限责任公司电力科学研究院 | Flue gas system and method for raising fume temperature of inlet of SCR (Selective Catalytic Reduction) denitration device |
| CN206944117U (en) * | 2017-06-06 | 2018-01-30 | 大唐贵州发耳发电有限公司 | A kind of structure for improving coal-fired electric generation furnace denitration inlet flue gas temperature |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115371074A (en) * | 2022-08-29 | 2022-11-22 | 西安热工研究院有限公司 | System for utilize fused salt heat-retaining-heat transfer to promote low-load denitration entry gas temperature |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105318313B (en) | A kind of smoke waste heat utilization system based on SCR denitration device | |
| CN203648364U (en) | Coal-fired boiler flue gas denitration system | |
| CN103055696A (en) | A SCR flue gas denitrification system having a pre-positioned dual fluid injection system | |
| CN206944117U (en) | A kind of structure for improving coal-fired electric generation furnace denitration inlet flue gas temperature | |
| CN104329946A (en) | Waste gas denitration and residual heat recovery integral system for coke oven flue | |
| CN107152673A (en) | A kind of device for improving coal-fired electric generation furnace denitration inlet flue gas temperature | |
| CN206262311U (en) | A kind of flue gas processing equipment of boiler | |
| CN208711405U (en) | A kind of ozone oxidation linkage control device | |
| CN105889899B (en) | A kind of overheating steam temperature regulating system and method suitable for putting into operation under SCR underloads | |
| CN103727803B (en) | A kind of equipment for denitrifying flue gas | |
| CN110701631A (en) | System and method for relieving blockage of air preheater through catalytic oxidation of escaped ammonia | |
| CN206549439U (en) | A kind of efficient ozone denitration jet-mixing system bioactive molecule reactor | |
| CN203316011U (en) | Structure for improving coal-fired boiler tail smoke denitration input rate | |
| CN104906950A (en) | Low-temperature SCR flue gas denitration equipment | |
| CN205717267U (en) | A kind of remove the device of air preheater cold-end air dust stratification after SCR system puts into operation | |
| CN205832922U (en) | A kind of coalitenessity kiln gas Environmental-protection comprehensive processing system | |
| CN205288047U (en) | Device that flue gas was handled to non - catalytic selectivity reduction method (SNCR) is used to glass kiln | |
| CN211069654U (en) | Two-stage ammonia injection combined denitration system | |
| CN105889895B (en) | It is a kind of to change area and the type of flow to improve the economizer of SCR inlet smoke temperature | |
| CN206597462U (en) | A kind of system for avoiding air preheater surfaces from generating ammonium hydrogen sulfate | |
| CN207943897U (en) | A kind of desulfurization wastewater Zero discharging system of the wide load denitration of cooperative achievement | |
| CN206215009U (en) | A kind of SO3 and NOx cooperation-removals device | |
| CN113368674A (en) | Denitration and dust removal combined system and method for coal-fired power plant | |
| CN203075835U (en) | Accident spraying system for preventing SCR (Selective Catalytic Reduction) denitration catalyst from overheating | |
| CN207478297U (en) | A kind of system for desulfuration and denitration |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170912 |
|
| RJ01 | Rejection of invention patent application after publication |