CN109647191A - A kind of air preheater device with denitration function - Google Patents
A kind of air preheater device with denitration function Download PDFInfo
- Publication number
- CN109647191A CN109647191A CN201910112975.6A CN201910112975A CN109647191A CN 109647191 A CN109647191 A CN 109647191A CN 201910112975 A CN201910112975 A CN 201910112975A CN 109647191 A CN109647191 A CN 109647191A
- Authority
- CN
- China
- Prior art keywords
- air preheater
- import
- heat exchanger
- exchanger tube
- pipe
- 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
- 230000008676 import Effects 0.000 claims abstract description 33
- 239000003054 catalyst Substances 0.000 claims abstract description 24
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000003546 flue gas Substances 0.000 claims abstract description 12
- 239000007789 gas Substances 0.000 claims abstract description 9
- 229920000742 Cotton Polymers 0.000 claims description 4
- 230000007613 environmental effect Effects 0.000 claims description 4
- 239000000779 smoke Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 206010022000 influenza Diseases 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Air Supply (AREA)
- Chimneys And Flues (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The present invention relates to a kind of air preheater devices with denitration function, including boiler flue and the first air preheater, the first import on first air preheater is connect by first pipe with secondary air fan, first outlet on first air preheater is connect with boiler furnace, first air preheater it is interior it is intracavitary be equipped with heat exchanger tube, out of stock catalyst is installed on the inner wall of heat exchanger tube, the entrance of heat exchanger tube is connect with boiler flue, second import of the flue gas through the second air preheater of the outlet discharge of heat exchanger tube is discharged from the second outlet of the second air preheater, second pipe is installed between third import in first pipe and the second air preheater, autocontrol valve is installed on second pipe, the gas that second pipe comes out through on the second air preheater third import and third export the first entrance for being supplied on first air preheater.Apparatus of the present invention are while providing the air of preheating to boiler furnace, additionally it is possible to realize and carry out denitration process to the flue gas in boiler flue have huge market value.
Description
Technical field
The present invention relates to a kind of air preheater devices with denitration function, belong to Denitration in Boiler equipment technical field of improvement.
Background technique
The nitrogen oxides of coal-burning power plant's discharge is one of the major pollutants for causing China's atmosphere pollution, therefore, for reality
The minimum discharge of nitrogen oxides, energy saving while guaranteeing that thermal power plant's high-efficiency environment friendly is run at standard in existing coal steam-electric plant smoke
It is also particularly important with optimization SCR denitration process.
Currently, when installing SCR denitration device additional, it is some built in order to meet the optimal reaction temperature of SCR denitration
At thermal power plant need to be transformed boiler economizer or preheater, or even also need to be transformed boiler steel frame, then
Upper SCR denitration device again, not only increases investment, but also long in time limit in this way.
Summary of the invention
The purpose of the present invention is to provide a kind of air preheater devices with denitration function, are providing preheating to boiler furnace
Air while, additionally it is possible to realize in boiler flue flue gas carry out denitration process.
For achieving the above object, a kind of the technical solution adopted by the present invention are as follows: air preheater dress with denitration function
It sets, including boiler flue and the first air preheater, the first import on first air preheater passes through first pipe and secondary air fan
It connects, the first outlet on first air preheater is connect with boiler furnace, and interior intracavitary be equipped with of first air preheater exchanges heat
It manages, out of stock catalyst is installed on the inner wall of the heat exchanger tube, the entrance of the heat exchanger tube is connect with the boiler flue, described
Second import of the flue gas through the second air preheater of the outlet discharge of heat exchanger tube is discharged from the second outlet of the second air preheater, and described the
Second pipe is installed between the third import on one pipeline and the second air preheater, automatic control is installed on the second pipe
Valve, the gas that the second pipe comes out through on the second air preheater third import and to be supplied to described first empty pre- for third outlet
The first entrance on device.
In above scheme, top plate is fixedly installed in first air preheater, the heat exchanger tube is fixed on the top plate.
In above scheme, support panel is fixedly installed in first air preheater, the out of stock catalyst is fixed on institute
It states in support panel, is supported between the out of stock catalyst and the inner wall of the heat exchanger tube by protection cotton.
In above scheme, subsequent environmental protection equipment is connected in the second outlet of second air preheater.
In above scheme, the first entrance on first air preheater is equipped with temperature sensor, the temperature sensing
The connection of the signal input part of device and controller, the controller are used to control the folding gap of the autocontrol valve.
Beneficial effects of the present invention: (1) being directly transformed air preheater, by installing out of stock urge in the first air preheater
Agent realizes and provides the purpose of preheated air to boiler furnace, additionally it is possible to which realization takes off the flue gas in boiler flue
Nitre processing.(2) heat exchange for passing through the second air preheater has ensured that the first entrance mixing air temperature into the first air preheater reaches
The best catalytic temperature of the out of stock catalyst in heat exchanger tube has been arrived, out of stock place efficiently can have been carried out to the flue gas in boiler flue
Reason.(3) by the first entrance mounting temperature sensor, using controller can the folding gap to autocontrol valve carry out
Adjust automatically is realized and is adjusted to the real-time online of the first entrance temperature.
Detailed description of the invention
In order that the present invention can be more clearly and readily understood, below according to specific implementation example with reference,
The present invention is described in further detail.
Fig. 1 is the air preheater system schematic with denitration function of the invention.
Fig. 2 is heat transfer tube structure diagram of the invention.
Fig. 3 is support panel schematic diagram of the invention.
In figure: 1. boiler flues；2. the first air preheater；The first import of 2-1.；2-2. first outlet；3. first pipe；4.
Secondary air fan；5. heat exchanger tube；6. second pipe；7. the second air preheater；The second import of 7-1.；7-2. second outlet；7-3. third
Import；The outlet of 7-4. third；8. out of stock catalyst；9. supporting panel；10. autocontrol valve；12. top plate；13. protection cotton.
Specific embodiment
Elaborate below to the embodiment of the present invention, the present embodiment premised on technical solution of the present invention under carry out it is real
It applies, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to following examples.
As shown in Figure 1, a kind of air preheater device with denitration function provided in this embodiment, including 1 He of boiler flue
First air preheater 2, the first import 2-1 on first air preheater 2 are connect by first pipe 3 with secondary air fan 4, and described the
First outlet 2-2 on one air preheater 2 is connect with boiler furnace, first air preheater 2 it is interior it is intracavitary be equipped with heat exchanger tube 5, institute
It states and out of stock catalyst 8 is installed on the inner wall of heat exchanger tube 5, the entrance of the heat exchanger tube 5 is connect with the boiler flue 1, described
Second import 7-1 of the flue gas through the second air preheater 7 of the outlet discharge of heat exchanger tube 5 is arranged from the second outlet 7-2 of the second air preheater 7
Out, subsequent environmental protection equipment is connected on the second outlet 7-2 of second air preheater 7.The first pipe 3 and the second air preheater
Second pipe 6 is installed between the third import 7-3 on 7, autocontrol valve 10 is installed on the second pipe 6, described
The gas that two pipelines 6 come out through on the second air preheater 7 third import 7-3 and third outlet 7-4 to be supplied to described first empty pre-
At the first import 2-1 on device 2.
As shown in Figures 2 and 3, the epicoele in first air preheater 2 is fixedly installed with top plate 12, and the heat exchanger tube 5 is solid
It is scheduled on the top plate 12.Cavity of resorption in first air preheater 2 is fixedly installed with support panel 9, and the out of stock catalyst 8 is solid
It is scheduled in the support panel 9, is propped up between the out of stock catalyst 8 and the inner wall of the heat exchanger tube 5 by protection cotton 13
Support fixes the position of out of stock catalyst 8 to realize, effectively prevents the flue gas being discharged from boiler flue 1 by out of stock
The generation that vibration causes the situation of falling off is generated when catalyst 8.
Preferably, temperature sensor, the temperature sensing are installed at the first import 2-1 on first air preheater 2
The connection of the signal input part of device and controller, the controller are used to control the folding gap of the autocontrol valve 10.It is described
5 shape of heat exchanger tube in air preheater 2 is square or hexagon.The top plate 12 is provided with the Kong Bingyu heat exchange of 5 bore of heat exchanger tube
Pipe 5 welds.The out of stock catalyst 8 can be with heat exchanger tube 5 with long or longer.The heat exchanger tube 5 can be single or double layer.
Gas flow mechanism of the invention is as follows: the pure air that secondary air fan 4 extracts directly passes through first pipe all the way
3 by the first import 2-1 enter the first air preheater 2 in exchange heat, in addition all the way by second pipe 6 through the second air preheater 7
On third import 7-3, third outlet 7-4 after import in the first import 2-1 on the first air preheater 2, due to the second air preheater 7
On the gas that is ejected from heat exchanger tube 5 also have surplus heat, will further add by the gas of third import 7-3, third outlet 7-4
Heat further adds to be summarized with the gas from being transported to the first import 2-1 from first pipe 3 using heat exchanger 5
Enter boiler furnace through the first outlet 2-2 on the first air preheater 2 after heat.
Pass through the flow direction of above-mentioned gas, on the one hand, realize into the air at the first import 2-1 of the first air preheater 2
It is hot wind, reduces the temperature difference of 2 front and back of the first air preheater, take full advantage of thermal energy；On the other hand, enter from the first import 2-1
Hot-air and heat exchanger tube 5 in boiler flue 1 out of stock catalyst 8 of flue gas while carrying out heat exchange, in heat exchanger tube 5
Out of stock processing is carried out to the flue gas in boiler flue 1, and is successively discharged into subsequent environmental protection from the second import 7-1 and second outlet 7-2
In equipment.In addition, in the present embodiment, due to the effect of out of stock catalyst 8 be promote reducing agent NH3 selectively with boiler flue
The substance that nitrogen oxides in middle flue gas chemically reacts at a certain temperature.The suitable reaction temperature of out of stock catalyst is very
Important: if reaction temperature is relatively low, the activity of catalyst can be reduced, and denitration efficiency is caused to decline, and if catalyst continues
Operation can make catalyst that permanent damage occur under low temperature；If reaction temperature is excessively high, NH3 is oxidized easily, and NOx generation amount increases
Add, can also cause the phase transformation of catalyst material, the activity of catalyst is made to degenerate.Therefore the present embodiment can also be according to the second air preheater
The temperature of temperature sensor adjusts the aperture of autocontrol valve at upper first import 2-1, to realized automatically to the first air preheater 2
The temperature of interior heat exchange air is adjusted, so that the temperature in heat exchanger tube 5 just reaches the optimal working condition of out of stock catalyst 8.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical scheme and beneficial effects
It describes in detail bright, it should be understood that the above is only a specific embodiment of the present invention, is not intended to restrict the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in guarantor of the invention
Within the scope of shield.
Claims (5)
1. a kind of air preheater device with denitration function, including boiler flue (1) and the first air preheater (2), described first is empty
The first import (2-1) on pre- device (2) is connect by first pipe (3) with secondary air fan (4), on first air preheater (2)
First outlet (2-2) connect with boiler furnace, which is characterized in that first air preheater (2) it is interior it is intracavitary be equipped with heat exchanger tube
(5), it is equipped with out of stock catalyst (8) on the inner wall of the heat exchanger tube (5), the entrance and the boiler smoke of the heat exchanger tube (5)
Second import (7-1) of the flue gas through the second air preheater (7) of road (1) connection, the outlet discharge of the heat exchanger tube (5) is empty from second
The second outlet (7-2) of pre- device (7) is discharged, the third import (7-3) on the first pipe (3) and the second air preheater (7) it
Between be equipped with second pipe (6), be equipped with autocontrol valve (10) on the second pipe (6), the second pipe (6) come out
Gas through on the second air preheater (7) third import (7-3) and third outlet (7-4) be supplied to first air preheater (2)
On the first import (2-1) at.
2. a kind of air preheater device with denitration function according to claim 1, which is characterized in that described first is empty pre-
It is fixedly installed with top plate (12) in device (2), the heat exchanger tube (5) is fixed on the top plate (12).
3. a kind of air preheater device with denitration function according to claim 1, which is characterized in that described first is empty pre-
Support panel (9) is fixedly installed in device (2), the out of stock catalyst (8) is fixed on the support panel (9), described de-
It is supported between pin catalyst (8) and the inner wall of the heat exchanger tube (5) by protection cotton (13).
4. a kind of air preheater device with denitration function according to claim 1, which is characterized in that described second is empty pre-
Subsequent environmental protection equipment is connected in the second outlet (7-2) of device (7).
5. a kind of air preheater device with denitration function according to claim 1, which is characterized in that described first is empty pre-
Temperature sensor, the signal input part company of the temperature sensor and controller are installed at the first import (2-1) on device (2)
It connects, the controller is used to control the folding gap of the autocontrol valve (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910112975.6A CN109647191A (en) | 2019-02-13 | 2019-02-13 | A kind of air preheater device with denitration function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910112975.6A CN109647191A (en) | 2019-02-13 | 2019-02-13 | A kind of air preheater device with denitration function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109647191A true CN109647191A (en) | 2019-04-19 |
Family
ID=66121278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910112975.6A Pending CN109647191A (en) | 2019-02-13 | 2019-02-13 | A kind of air preheater device with denitration function |
Country Status (1)
| Country | Link |
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| CN (1) | CN109647191A (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4602673A (en) * | 1983-10-03 | 1986-07-29 | L. & C. Steinmuller Gmbh | Apparatus for preheating combustion air, accompanied by simultaneous reduction of NOx contained in the flue gases |
| JPH0391610A (en) * | 1989-09-05 | 1991-04-17 | Babcock Hitachi Kk | Air preheater and prevention of burning of heat conducting body |
| JP2003340267A (en) * | 2002-05-30 | 2003-12-02 | Mitsubishi Rayon Co Ltd | Method for packing catalyst and multitubular heat exchange type reactor |
| CN102580530A (en) * | 2012-03-25 | 2012-07-18 | 山东三融环保工程有限公司 | Selective catalytic reduction (SCR) denitrification device with heat pipe type air pre-heater |
| CN202563356U (en) * | 2012-04-25 | 2012-11-28 | 四川东能节能技术有限公司 | Boiler flue gas temperature regulating device before denitration |
| CN203927988U (en) * | 2014-06-05 | 2014-11-05 | 山东大学 | Empty pre-denitration one reactor |
| CN106642177A (en) * | 2016-09-21 | 2017-05-10 | 天津市电力科技发展有限公司 | System for increasing smoke temperature at denitration inlet under low load |
| CN106994301A (en) * | 2017-03-21 | 2017-08-01 | 华电电力科学研究院 | The efficient SCR denitration structures and methods of sulfur dioxide/sulphur trioxide conversion rate can be reduced |
| CN107300188A (en) * | 2017-03-06 | 2017-10-27 | 上海发电设备成套设计研究院 | A kind of smoke comprehensive energy-saving and emission-reduction system for taking into account low-temperature corrosion and UTILIZATION OF VESIDUAL HEAT IN |
| CN107448962A (en) * | 2017-08-10 | 2017-12-08 | 江苏鲲鹏环保工程技术有限公司 | A kind of outer denitrating technique system of chain furnace high/low temperature flue gas holding furnace |
| CN207729640U (en) * | 2017-12-28 | 2018-08-14 | 上海宁松热能环境工程有限公司 | A kind of water heat medium formula air preheater with SCR denitration function |
| CN207933087U (en) * | 2018-01-26 | 2018-10-02 | 福建龙净环保股份有限公司 | A kind of smoke waste heat utilization system and desulfurization wastewater vapo(u)rization system |
| CN209952593U (en) * | 2019-02-13 | 2020-01-17 | 江苏鲲鹏环保工程技术有限公司 | Air preheater device with denitration function |
-
2019
- 2019-02-13 CN CN201910112975.6A patent/CN109647191A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4602673A (en) * | 1983-10-03 | 1986-07-29 | L. & C. Steinmuller Gmbh | Apparatus for preheating combustion air, accompanied by simultaneous reduction of NOx contained in the flue gases |
| JPH0391610A (en) * | 1989-09-05 | 1991-04-17 | Babcock Hitachi Kk | Air preheater and prevention of burning of heat conducting body |
| JP2003340267A (en) * | 2002-05-30 | 2003-12-02 | Mitsubishi Rayon Co Ltd | Method for packing catalyst and multitubular heat exchange type reactor |
| CN102580530A (en) * | 2012-03-25 | 2012-07-18 | 山东三融环保工程有限公司 | Selective catalytic reduction (SCR) denitrification device with heat pipe type air pre-heater |
| CN202563356U (en) * | 2012-04-25 | 2012-11-28 | 四川东能节能技术有限公司 | Boiler flue gas temperature regulating device before denitration |
| CN203927988U (en) * | 2014-06-05 | 2014-11-05 | 山东大学 | Empty pre-denitration one reactor |
| CN106642177A (en) * | 2016-09-21 | 2017-05-10 | 天津市电力科技发展有限公司 | System for increasing smoke temperature at denitration inlet under low load |
| CN107300188A (en) * | 2017-03-06 | 2017-10-27 | 上海发电设备成套设计研究院 | A kind of smoke comprehensive energy-saving and emission-reduction system for taking into account low-temperature corrosion and UTILIZATION OF VESIDUAL HEAT IN |
| CN106994301A (en) * | 2017-03-21 | 2017-08-01 | 华电电力科学研究院 | The efficient SCR denitration structures and methods of sulfur dioxide/sulphur trioxide conversion rate can be reduced |
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| CN207729640U (en) * | 2017-12-28 | 2018-08-14 | 上海宁松热能环境工程有限公司 | A kind of water heat medium formula air preheater with SCR denitration function |
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