CN108905558B - Denitration system and method based on SOFA (solid State imaging) combined SNCR (selective non-catalytic reduction) system - Google Patents
Denitration system and method based on SOFA (solid State imaging) combined SNCR (selective non-catalytic reduction) system Download PDFInfo
- Publication number
- CN108905558B CN108905558B CN201810917537.2A CN201810917537A CN108905558B CN 108905558 B CN108905558 B CN 108905558B CN 201810917537 A CN201810917537 A CN 201810917537A CN 108905558 B CN108905558 B CN 108905558B
- Authority
- CN
- China
- Prior art keywords
- sofa
- sncr
- reducing agent
- denitration
- outlet
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000010531 catalytic reduction reaction Methods 0.000 title description 4
- 238000003384 imaging method Methods 0.000 title description 2
- 239000007787 solid Substances 0.000 title description 2
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 78
- 239000003546 flue gas Substances 0.000 claims abstract description 33
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000002347 injection Methods 0.000 claims abstract description 32
- 239000007924 injection Substances 0.000 claims abstract description 32
- 238000006243 chemical reaction Methods 0.000 claims abstract description 23
- 238000009826 distribution Methods 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 8
- 238000005507 spraying Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 4
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 2
- 239000007921 spray Substances 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 10
- 230000009466 transformation Effects 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 description 12
- 238000006722 reduction reaction Methods 0.000 description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- 230000009467 reduction Effects 0.000 description 5
- 239000000779 smoke Substances 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 239000004202 carbamide Substances 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000006479 redox reaction Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- 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
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- 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
- B01D53/77—Liquid phase processes
- B01D53/79—Injecting reactants
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (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)
- Treating Waste Gases (AREA)
Abstract
The denitration system and method based on the SOFA combined SNCR system provided by the invention have the advantages of simple structure, reasonable design, convenience in transformation, no additional equipment pipelines, suitability for combined application of other flue gas treatment technologies, low investment cost and high denitration efficiency. The system comprises an SOFA system and an SNCR system which are both arranged on the denitration boiler; the SOFA system comprises two SOFA outlets, wherein the first SOFA outlet is arranged in a burnout zone of the boiler, and the second SOFA outlet is arranged in an SNCR reaction zone corresponding to a reducing agent injection port of the SNCR system. The method is that an SOFA system and an SNCR system are simultaneously arranged on a denitration boiler; and (3) leading out one path of over-fire air from an air outlet in the SOFA system, and injecting the over-fire air and the reducing agent in the reducing agent injection port in the SNCR system into the SNCR reaction zone.
Description
Technical Field
The invention belongs to the technical field of flue gas nitrogen oxide pollutant removal, and relates to a denitration system and method based on an SOFA combined SNCR system.
Background
The deep Air-staged low NOX combustion system in the furnace based on the separation over-Fire Air SOFA (SEPARATED OVER-Fire Air) is a mode of Air-staged combustion which is used more in the coal-fired power plant at present. The SOFA system is based on a separated over-fire air technology, OFA and SOFA are arranged at different heights of a hearth, the hearth is divided into an initial combustion NOx reduction area and a fuel over-fire area, and through optimizing an excessive air coefficient, NOx emission can be effectively reduced and combustion efficiency can be improved to the maximum extent. NOx can be controlled and reduced from its source of production, but no further treatment of the already produced NOx is possible.
SNCR (SelectiveNon-CatalyticReduction) is a selective non-catalytic reduction denitration technology, NH 3, urea and the like are used as denitration reducing agents to be sprayed into a furnace in a region with the temperature of 850-1100 ℃, NH 3 and NOx in flue gas are subjected to selective oxidation reduction reaction, and the NOx is reduced into nitrogen and water. The main chemical reaction:
4NO+4NH3+O2→4N2+6H2O (1)
NO+NO2+2NH3→2N2+3H2O (2)
6NO2+8NH3→7N2+12H2O (3)
Thus, in the SNCR process, the storage, dilution, supply of the reducing agent and the in-boiler injection reaction system are mainly included. The denitration efficiency is more than or equal to 50%, the ammonia escape concentration is less than 5mg/Nm 3, a catalyst is not used, and the denitration device has the advantages of low investment cost, simple device, small occupied area and the like. However, the SNCR technology has higher consumption of reducing agent, and is suitable for devices with lower emission reduction index requirements or as a complementary technology of a low NOx combustion technology.
The SNCR has larger control difficulty on the reaction temperature and residence time, and because the SNCR has a narrower temperature range, and the temperature distribution of the boiler flue gas changes when the boiler changes load, the optimal ammonia spraying point and spray gun setting are usually selected through flow field analysis, and a coping mode is provided for the boiler load change. The choice of temperature window is therefore critical to the efficiency of SNCR reduction of NO.
The temperature is higher, the reducing agent is oxidized into NOx, and the content of NOx in the flue gas is not reduced but increased; the temperature is lower, the reaction is insufficient, the loss of the reducing agent is caused, the adverse effect on downstream equipment is caused, and even new pollution is caused. Therefore, how to ensure the full mixing reaction of the raw material and the flue gas and ensure that a higher NOx reduction rate is obtained when the molar ratio of NH 3/NO is proper is a key technology to be solved urgently.
The method has the problems that the temperature of the flue gas near the reducing agent injection position of the SNCR is high, the reducing agent cannot immediately act with NOx in the flue gas after being injected, the residence time of the reducing agent is wasted, and the denitration efficiency of the SNCR cannot be effectively improved. For large-scale heat-engine plant boilers, the flue gas and the reducing agent are difficult to mix uniformly in the hearth, and the denitration rate is generally not higher than 40%. At the same time, the temperature range at which the different reducing agents are used is different, for example urea acts as the reducing agent in a slightly higher temperature range, while ammonia acts as the reducing agent in a relatively lower temperature range.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a denitration system and a denitration method based on an SOFA combined SNCR system, which have the advantages of simple structure, reasonable design, convenient transformation, no additional equipment pipelines, low investment cost and high denitration efficiency, and are suitable for being combined with other flue gas treatment technologies.
The invention is realized by the following technical scheme:
A denitration system based on an SOFA combined SNCR system comprises an SOFA system and an SNCR system which are both arranged on a denitration boiler;
the SOFA system comprises two SOFA outlets, wherein the first SOFA outlet is arranged in a burnout zone of the boiler, and the second SOFA outlet is arranged in an SNCR reaction zone corresponding to a reducing agent injection port of the SNCR system.
Preferably, the second SOFA outlet is correspondingly provided with a gas nozzle, the reducing agent jet orifice is correspondingly provided with a liquid nozzle, the gas nozzle and the liquid nozzle are jointly arranged in the SNCR reaction zone, and the lowest layer in the SNCR reaction zone is the gas nozzle.
Preferably, the second SOFA outlet of each path and the corresponding reductant injection port share a two-fluid nozzle.
Preferably, the SOFA system further comprises a SOFA fan connected to the first SOFA outlet and the second SOFA outlet for supplying air.
Preferably, the system further comprises a reburning system arranged on the denitration boiler, wherein the reburning system comprises a reburning air outlet arranged in the reburning zone and a reburning fan connected with the reburning air outlet for supplying air.
Preferably, the SNCR system comprises a distribution module, a metering module, a circulation module and a reducing agent preparation device which are sequentially connected to the reducing agent injection port.
Further, the automatic control module is used for controlling the metering module and the distribution module; the input end of the automatic control module is connected with a flue gas NOx concentration monitor arranged in the flue; the flue gas NOx concentration monitor is arranged in a flue after the SNCR reaction zone.
A denitration method based on SOFA combined SNCR system simultaneously sets up SOFA system and SNCR system on the denitration boiler; and (3) leading out one path of over-fire air from an air outlet in the SOFA system, and injecting the over-fire air and the reducing agent in the reducing agent injection port in the SNCR system into the SNCR reaction zone.
Preferably, one path of over-fire air led out from the SOFA system and the reducing agent in the SNCR system share one two fluid nozzle on the same path; or the gas nozzle corresponding to the over-fire air and the liquid nozzle corresponding to the reducing agent are adopted to be sprayed into the SNCR reaction zone together.
Preferably, the SNCR reducing agent injection port smoke temperature is reduced to within 1000 ℃ +/-100 ℃ by adjusting the opening and the angle of the introduced SOFA wind.
Compared with the prior art, the invention has the following beneficial technical effects:
According to the denitration system and method based on the SOFA combined SNCR system, through the combination of the two systems, on one hand, the up-and-down swinging function of the separated over-fire air of the first SOFA outlet can be utilized, the smoke temperature deviation of the hearth outlet is effectively controlled, the smoke temperature deviation of the hearth outlet is reduced to about 30 ℃, and the position of the reducing agent injection point of the SNCR is located in the temperature window of the SNCR; on the other hand, the separated over-fire air and the reducing agent led out from the second SOFA outlet are sprayed into the hearth together, so that the temperature of flue gas near the spraying position of the SNCR reducing agent is effectively reduced, the probability of full contact between the denitration reducing agent and the flue gas is increased, the SNCR denitration reducing agent is utilized to the greatest extent, the denitration efficiency of the SNCR is ensured, the condition that the initial temperature of interaction between the reducing agent near the spraying opening and flue gas NOx in the hearth is higher can be effectively improved, the reducing agent is fully utilized, the emission of NOx is reduced, the running economy of a boiler is improved, and the SNCR efficiency is improved.
Furthermore, the denitration boiler can be modified according to the condition of the denitration boiler, additional equipment pipelines are not added, and the denitration boiler is suitable for being used in combination with other flue gas treatment technologies, and has a wide application prospect in denitration modification of coal-fired power plants, especially old plants.
Furthermore, in the denitration system, the reducing agent amount in the SNCR system can be controlled and distributed through the feedback control of the concentration of NOx in the flue gas, so that the denitration efficiency is better improved.
Drawings
FIG. 1 is a schematic diagram of a denitration system based on a SOFA combined SNCR system;
In the figure: the device comprises a 1-reburning zone, a 2-burnout zone, a 3-reducing agent preparation device, a 4-circulation module, a 5-metering module, a 6-distribution module, a 7-reducing agent injection port, an 8-SNCR reaction zone, a 9-reburning air outlet, a 101-reburning fan, a 102-SOFA fan, a 11-first SOFA outlet, a 12-automatic control module and a 13-flue gas NOx concentration monitor.
Detailed Description
The invention will now be described in further detail with reference to specific examples, which are intended to illustrate, but not to limit, the invention.
According to the invention, the separated over-fire air of the SOFA system is combined with the injection of the reducing agent of the SNCR system, so that the temperature near the injection position of the SNCR is effectively reduced, the reducing agent is uniformly mixed with the flue gas near the injection position, and the effective residence time of the reducing agent is increased, thereby ensuring the denitration efficiency of the SNCR and realizing the purpose of reducing the NOx emission. Particularly has very wide application and popularization prospect under the condition of low-load operation in coal-fired power plants.
The invention discloses a denitration system based on an SOFA combined SNCR system, which mainly comprises an SNCR system and an SOFA system, wherein the SNCR system comprises a reducing agent injection system, and the denitration system comprises the following components:
The reducing agent injection system generates denitration reducing agent through the reducing agent preparation device 3, the generated denitration reducing agent sequentially passes through the circulation module 4 and the metering module 5, the reducing agent with different doses enters the SNCR reaction zone 8 through the injection port by the distribution module 6, the reducing agent and NOx in the flue gas are subjected to reduction reaction, and finally the NOx is converted into N 2 to reach the emission standard.
The SNCR system adopts a urea method to prepare a denitration reducing agent, the reducing agent which is sent by the reducing agent preparation system enters the SNCR reaction zone 8 through a jet orifice to perform oxidation-reduction reaction with NOx in the flue gas, and finally is converted into N 2 to reach the emission standard.
The SOFA system is closer to the SNCR injection position, the first SOFA outlet 11 adopts a horizontal swing separation over-fire air design, the mixing process of SOFA and delay is effectively adjusted, and the carbon content of fly ash and the smoke temperature deviation of the hearth outlet are controlled. Meanwhile, the SOFA and the reducing agent are cited to share one injection port through the second SOFA outlet or are injected on the same layer, namely, an integrated or separated SOFA injection port is added at the reducing agent injection position of the SNCR system, so that the problems that the initial temperature is higher near the SNCR injection position and the reducing agent is unevenly mixed with the flue gas near the injection position can be solved, the reducing agent can be enabled to act in advance, the residence time of the reducing agent is prolonged, and the denitration reducing agent of the SNCR is guaranteed to be fully utilized.
Specifically, as shown in fig. 1, a denitration system based on a SOFA combined SNCR system comprises a SNCR system, a SOFA system and a reburning system, wherein the SNCR system comprises a reducing agent injection system arranged outside a denitration boiler.
The reducing agent preparation device 3 sequentially passes through the circulation module 4, the metering module 5 and the distribution module 6, and enters the SNCR reaction zone 8 in the flue system through the reducing agent injection port 7 to perform reduction reaction with NOx in the flue gas, and finally NOx is converted into N 2 to reach the emission standard.
The reburning system 9, unlike the SNCR flue gas denitration technique of post-combustion emission reduction, reduces NOx by fuel staged combustion during combustion. The reburning system is used for supplying fuel and air for combustion in a sectional way, and three different combustion sections, namely a main combustion section, a reburning section and a burnout section, are formed in the furnace. The combustion air is supplied in two stages by staged air supply, wherein 70% -90% of the air is supplied to the burner as primary air, and the rest is sprayed into the furnace above the burner as over-fire air. The SOFA system is a split-type overfire air-supplying system for supplying overfire air to the reburning system 9.
The SOFA air rate is a key factor for determining the concentration of NOx in the over-fire air technology, the SOFA air rate is usually designed to be lower than 30% of the total air rate, and the temperature deviation of the denitration reducing agent inlet can be changed by adjusting the opening and the angle of the introduced SOFA air rate. The proper denitration temperature is generally 900-1100 ℃, the denitration efficiency is reduced due to the fact that the temperature is too low, the unreacted NH 3 is discharged along with the flue gas to cause secondary pollution, and the denitration efficiency is reduced due to the fact that the reducing agent with the too high temperature is oxidized into NOx. Under the full-load operation condition, the temperature of the flue gas in the position area of the reducing agent spraying port is always higher than the temperature window of SNCR denitration, for example, the temperature of the flue gas near the SNCR reducing agent spraying port is 1300 ℃, the temperature range in the area can be reduced to be within 1000+/-100 ℃ by adjusting the opening and the angle of the introduced SOFA wind, and the total ammonia nitrogen molar ratio is 1:1, spraying a reducing agent with the volume concentration of 15-45%.
The separated over-fire air of the second SOFA outlet 11 is fed back according to the data of the flue gas NOx concentration monitoring system 13, regulated and controlled by the automatic control module 12, distributed by the distribution module 6, and injected into the flue system together with the reducing agent of the reducing agent injection port 7, and the reducing agent is uniformly mixed with the flue gas near the injection position by reducing the flue gas temperature near the SNCR injection port, so that the effective residence time of the reducing agent is increased, the denitration efficiency of the SNCR is ensured, and the purpose of reducing the NOx emission is realized.
The SOFA over-fire air is combined with the injection of the reducing agent, so that the temperature near the SNCR injection position is effectively reduced, and the method has very wide application and popularization prospects especially under the condition of low-load operation in coal-fired power plants.
Embodiments of the present invention are not limited in this regard.
Claims (4)
1. The denitration system based on the SOFA combined SNCR system is characterized by comprising the SOFA system and the SNCR system which are both arranged on a denitration boiler;
The SOFA system comprises two SOFA outlets, wherein a first SOFA outlet (11) is arranged in a burnout zone (2) of the boiler, a second SOFA outlet is arranged in an SNCR reaction zone (8) corresponding to a reducing agent jet orifice (7) of the SNCR system, and separated burnout energy of the first SOFA outlet (11) can swing up and down;
The second SOFA outlet is correspondingly provided with a gas nozzle, the reducing agent jet orifice (7) is correspondingly provided with a liquid nozzle, the gas nozzle and the liquid nozzle are jointly arranged in the SNCR reaction zone (8), and the gas nozzle is arranged at the lowest layer in the SNCR reaction zone (8);
The second SOFA outlet of each path and the corresponding reducing agent jet orifice (7) share a two-fluid jet orifice or are jetted on the same layer;
the temperature range of the area can be reduced to within 1000+/-100 ℃ by adjusting the opening degree and the angle of the introduced SOFA wind, and the total ammonia nitrogen molar ratio is 1:1, spraying a reducing agent with the volume concentration of 15-45%;
The SNCR system comprises a distribution module (6), a metering module (5), a circulation module (4) and a reducing agent preparation device (3) which are sequentially connected to a reducing agent injection port (7);
The automatic control module (12) is used for controlling the metering module (5) and the distribution module (6); the input end of the automatic control module (12) is connected with a flue gas NOx concentration monitor (13) arranged in the flue; the flue gas NOx concentration monitor (13) is arranged in a flue after the SNCR reaction zone (8).
2. A denitration system based on a SOFA combined SNCR system according to claim 1, further comprising a SOFA fan (102) connected to the first SOFA outlet (11) and the second SOFA outlet for supplying air.
3. The denitration system based on the SOFA combined SNCR system as in claim 1, further comprising a reburning system arranged on the denitration boiler, wherein the reburning system comprises a reburning air outlet (9) arranged in the reburning area (1), and a reburning fan (101) connected with the reburning air outlet (9) for supplying air.
4. A denitration method based on an SOFA combined with an SNCR system, wherein the SOFA system and the SNCR system are simultaneously arranged on a denitration boiler based on the SOFA combined with the SNCR system according to claim 1; an air outlet in the SOFA system is led out of one path of over-fire air, and is sprayed into an SNCR reaction zone (8) together with a reducing agent in a reducing agent spraying port (7) in the SNCR system;
One path of over-fire air led out from the SOFA system and the reducing agent from the SNCR system share one two fluid nozzle on the same path; or adopting a gas nozzle corresponding to over-fire air and a liquid nozzle corresponding to reducing agent to spray into the SNCR reaction zone (8) together;
And reducing the temperature of the flue gas near the SNCR reducing agent injection port to within 1000+/-100 ℃ by adjusting the opening and the angle of the introduced SOFA wind.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810917537.2A CN108905558B (en) | 2018-08-13 | 2018-08-13 | Denitration system and method based on SOFA (solid State imaging) combined SNCR (selective non-catalytic reduction) system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810917537.2A CN108905558B (en) | 2018-08-13 | 2018-08-13 | Denitration system and method based on SOFA (solid State imaging) combined SNCR (selective non-catalytic reduction) system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108905558A CN108905558A (en) | 2018-11-30 |
| CN108905558B true CN108905558B (en) | 2024-05-14 |
Family
ID=64404590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810917537.2A Active CN108905558B (en) | 2018-08-13 | 2018-08-13 | Denitration system and method based on SOFA (solid State imaging) combined SNCR (selective non-catalytic reduction) system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108905558B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112371194B (en) * | 2020-11-17 | 2022-09-06 | 哈尔滨中科盈江科技有限公司 | Automatic control device for upgrading spray pen for preparing nano catalyst |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5756059A (en) * | 1996-01-11 | 1998-05-26 | Energy And Environmental Research Corporation | Advanced reburning methods for high efficiency NOx control |
| CN1651127A (en) * | 2003-11-13 | 2005-08-10 | 通用电气公司 | Method and apparatus for reducing flue gas NOx |
| CN105920997A (en) * | 2016-06-12 | 2016-09-07 | 华中科技大学 | Coal-fired boiler denitration system and method with over fire air and SNCR coupled |
| CN208711398U (en) * | 2018-08-13 | 2019-04-09 | 中国华能集团有限公司 | A kind of denitrating system based on SOFA joint SNCR system |
-
2018
- 2018-08-13 CN CN201810917537.2A patent/CN108905558B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5756059A (en) * | 1996-01-11 | 1998-05-26 | Energy And Environmental Research Corporation | Advanced reburning methods for high efficiency NOx control |
| CN1651127A (en) * | 2003-11-13 | 2005-08-10 | 通用电气公司 | Method and apparatus for reducing flue gas NOx |
| CN105920997A (en) * | 2016-06-12 | 2016-09-07 | 华中科技大学 | Coal-fired boiler denitration system and method with over fire air and SNCR coupled |
| CN208711398U (en) * | 2018-08-13 | 2019-04-09 | 中国华能集团有限公司 | A kind of denitrating system based on SOFA joint SNCR system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108905558A (en) | 2018-11-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100425325C (en) | Dusted composite SCR smoke denitration and its denitrating catalytic reactor | |
| CN102179171B (en) | Multi-stage themolysis coupled denitration method using front flow field uniformizing device and device thereof | |
| CN102966945B (en) | Reduce the method for biomass recirculating fluidized bed boiler discharged nitrous oxides | |
| CN208406566U (en) | A kind of multipoint mode injection apparatus for circulating fluidized bed boiler SNCR denitration system | |
| CN207694604U (en) | The adjustable full load denitrating system of denitration flue-gas temperature | |
| CN104324611A (en) | Flue gas SCR denitration system of thermal power plant | |
| CN103638805B (en) | A kind of CFB boiler SNCR denitration method for flue gas of dual reducting agents | |
| CN103263828A (en) | Fume gas denitration system of coal-fired boiler based on SNCR (Selective Non-catalytic Reduction) and SCR (Selective Catalytic Reduction) combination method | |
| CN101773781A (en) | Method for realizing SNCR and SCR combined denitration by using coal-fired boiler | |
| CN108434964A (en) | A kind of matrix form injection apparatus for circulating fluidized bed boiler SNCR denitration system | |
| CN103551033A (en) | Scr denitration device and flue gas denitration method | |
| CN203648364U (en) | Coal-fired boiler flue gas denitration system | |
| CN108905558B (en) | Denitration system and method based on SOFA (solid State imaging) combined SNCR (selective non-catalytic reduction) system | |
| CN212492330U (en) | Active coke combined desulfurization and denitrification system based on pre-oxidation | |
| CN204933244U (en) | NOx removal device in coal-burning power plant's coal-powder boiler flue gas | |
| CN202289834U (en) | High-efficiency denitration device for circulating fluidized bed boiler | |
| CN111298643A (en) | Be applicable to circulating fluidized bed boiler full load denitration control system | |
| CN101482263B (en) | Lignite low nitrogen oxide combustion method with dry-type amino reductive delivery | |
| CN204261561U (en) | Coal steam-electric plant smoke SCR denitration system | |
| CN208711398U (en) | A kind of denitrating system based on SOFA joint SNCR system | |
| CN213348376U (en) | High-efficient SNCR deNOx systems of biomass boiler | |
| CN104906950A (en) | Low-temperature SCR flue gas denitration equipment | |
| CN202962241U (en) | Device for synergistically removing flue gas mercury | |
| CN202387369U (en) | High-efficiency denitration device for pulverized coal boiler | |
| CN210021739U (en) | SCR denitration system for industrial kiln tail gas NOx |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |