CN204656310U - A kind of SNCR-SCR combines flue gas denitrification system - Google Patents
A kind of SNCR-SCR combines flue gas denitrification system Download PDFInfo
- Publication number
- CN204656310U CN204656310U CN201520289677.1U CN201520289677U CN204656310U CN 204656310 U CN204656310 U CN 204656310U CN 201520289677 U CN201520289677 U CN 201520289677U CN 204656310 U CN204656310 U CN 204656310U
- Authority
- CN
- China
- Prior art keywords
- flue
- flue gas
- collector
- horizontal
- gas
- 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
Landscapes
- Chimneys And Flues (AREA)
Abstract
A kind of SNCR-SCR combines flue gas denitrification system, comprise horizontal flue, flue collector that horizontal flue is connected, the chimney that is connected with the outlet of flue collector, wherein, ammonia-spraying grid is provided with in described horizontal flue, be provided with SCR reaction unit in described flue collector, it is characterized in that, described system also comprises flue gas return mechanism, be arranged between described flue collector and described chimney, for optionally the flue gas flowing out flue collector being back to described horizontal flue.This flue gas denitrification system can regulate flue gas flow direction, improves denitration efficiency, reduces the discharge of nitrogen oxide.
Description
Technical field
The utility model relates to a kind of flue gas denitrification system, especially relates to a kind of SNCR (SNCR) and SCR (SCR) combines flue gas denitrification system.
Background technology
At present, the tail gas denitration technology of coal fired boiler of power plant comprises SNCR technology and SCR technology.
SNCR denitration technology sprays in boiler or pipeline, with nitrogen oxide (NO by reducing agents such as ammonia, ammoniacal liquor or urea
x) carry out selective reaction, without catalyst, therefore reducing agent must be added in high-temperature region.General its is operated in the region that temperature is 850 ~ 1100 DEG C, and reducing agent rapid thermal decomposition becomes ammonia at this temperature, with the NO in flue gas
xreaction generates nitrogen and steam.When temperature is lower than 800 DEG C, the reaction rate of ammonia declines, NO
xpercent reduction is lower, and the escape amount of ammonia increases simultaneously; But when temperature is higher than 1200 DEG C, most of ammonia is not used to reductive NO
xbut being oxidized to NO, the oxidation reaction of ammonia starts to play a leading role, and NO concentration may be caused to raise.The denitration efficiency of SNCR gas denitrifying technology is generally 30% ~ 80%, very large by boiler structure size impact.
The principle of SCR denitration technology sprays in high-temperature flue gas denitrification apparatus, by NO in flue gas under the effect of catalyst using ammonia as denitrfying agent
xbe decomposed into nitrogen and steam.General by using suitable catalyst, reaction effectively can be carried out, at NH in the temperature range of 200 DEG C ~ 450 DEG C
3when/NO=1, the denitration efficiency of 80 ~ 90% can be reached.But when reaction temperature is not in this temperature range, the performance of catalyst will reduce, especially when high-temperature area uses, because the overheated surface of catalyst of impelling is sintered, catalyst life is reduced.
Along with the industrial development of China and growth in the living standard, people are to the problem growing interest of atmosphere pollution.In " fossil-fuel power plant atmospheric pollutant emission standard " of the up-to-date issue of Chinese Ministry of Environmental Protection, the emission limit of regulation nitrogen oxide is decided to be 100mg/ cubic meter.Therefore, adopt separately a kind of denitration technology to be difficult to meet increasingly strict environmental requirement, use SNCR/SCR to combine flue gas denitrification system by imperative.
Chinese patent 201310188611.9 discloses a kind of SNCR and SCR combination method flue gas denitrification system, and it comprises burner hearth, cyclone separator and back-end ductwork.SNCR injection of reducing agent injection device is arranged on furnace outlet and/or cyclone inlet, and SCR denitration device is arranged in back-end ductwork.The flue gas of furnace outlet can reduce concentration of emission and the NH of nitrogen oxide effectively through the two-stage denitrification apparatus of SNCR and SCR
3escape concentration.
But, with heat supply for main power supply is on auxiliary small-sized recirculating fluidized bed, because boiler load is subject to the hot quantitative limitation of heat supply user, the load in daytime and evening differs greatly, and simultaneously boiler load is also limited by the change in season.In heating load demand more daytime and winter, heating boiler, in order to meet heating load, is usually in high load capacity even hard service; In heating load demand less evening and summer, heating boiler load by be in 60-70% even lower than 50% state.This characteristic of heating boiler, result in the fluctuation of boiler smoke temperature comparatively large, and the size of boiler smoke temperature directly affects the height of SNCR and SCR denitration efficiency.When burner hearth high load capacity operates, the flue gas of furnace outlet is by the reaction temperature interval (850 DEG C ~ 1100 DEG C) higher than the effective denitration of SNCR, and now most reducing agent is oxidized to NO, and denitration efficiency reduces, and causes the raising of NO concentration.Meanwhile, when high-temperature flue gas is through SCR reaction unit, its temperature still may higher than the optimal reaction temperature of SCR device, thus impel the surface of catalyst to be sintered, and catalyst life is reduced.
Utility model content
The purpose of this utility model is intended to overcome the defect in above-mentioned technology, provide a kind of SNCR-SCR of flue gas flow direction that can regulate and combine flue gas denitrification system, when burner hearth heavy-duty service, the flue-gas temperature in SNCR and SCR region can be reduced, thus raising denitration efficiency, reduce the discharge of nitrogen oxide.
The purpose of this utility model is achieved by following technical scheme:
A kind of SNCR-SCR combines flue gas denitrification system, comprise horizontal flue, flue collector that horizontal flue is connected, the chimney that is connected with the outlet of flue collector, wherein, ammonia-spraying grid is provided with in described horizontal flue, be provided with SCR reaction unit in described flue collector, it is characterized in that, described system also comprises flue gas return mechanism, be arranged between described flue collector and described chimney, for optionally the flue gas flowing out flue collector being back to described horizontal flue.
Further, flue gas return mechanism comprises Returning pipe and returns baffle plate, one end of described Returning pipe is connected between flue collector and chimney, the other end is connected with the horizontal flue before ammonia-spraying grid, describedly return the entrance that baffle plate is arranged on Returning pipe, when the flue-gas temperature entering horizontal flue is higher than 1100 DEG C, described in opening, return baffle plate, so that the flue gas that flue collector is discharged turns back to horizontal flue.
Further, the junction of Returning pipe and horizontal flue is provided with aerosol spraying grid, and the flue gas returned enters horizontal flue by aerosol spraying grid.
Further, booster fan is provided with in Returning pipe.
Further, in flue collector, be provided with economizer and air preheater, wherein, before described economizer is positioned at SCR reaction unit, after described air preheater is positioned at SCR reaction unit.
Further, in the flue collector (6) before economizer (12), be provided with high-temperature heat-exchanging (9) and cryogenic heat exchanger (11).
Further, between the outlet and Returning pipe entrance of flue collector, deduster is provided with.
Further, system also comprises flue gas shunting device, for shunting the partial fume in horizontal flue.
Further, flue gas shunting device comprises at least one auxiliary flue, at least one gas baffle and at least one shield body, dividing plate is set in flue collector to form auxiliary flue, described dividing plate extends to economizer rear end from flue collector porch, gas baffle is arranged on the porch of auxiliary flue, the described entrance of auxiliary flue is connected with the pilot outlet of horizontal flue, the entrance of flue collector is connected with the primary outlet of horizontal flue, and the inwall that described shield body is arranged on flue collector is positioned at the end of described auxiliary flue.
Further, flue gas shunting device comprises at least one auxiliary flue and at least one gas baffle, described gas baffle is arranged on the porch of auxiliary flue, the auxiliary entrance of flue is connected with the pilot outlet of horizontal flue, the outlet of auxiliary flue and flue collector is connected and between economizer and SCR reaction unit, the entrance of flue collector is connected with the primary outlet of horizontal flue.
The utility model adds flue gas return mechanism on the basis to existing SNCR-SCR combined denitration system, and when burner hearth normally runs, close this return mechanism, the flue gas of flue collector is got rid of through chimney.And when burner hearth high load capacity works, enter the optimal reaction temperature region of flue-gas temperature more than SNCR of horizontal flue, now open flue gas return mechanism, the low-temperature flue gas that flue collector exports is returned horizontal flue, to reduce the temperature of SNCR conversion zone, thus improve denitration efficiency.Meanwhile, the temperature of the SCR denitration device in downstream also reduces along with the reduction of cigarette temperature, guarantees that SCR reaction is in optimum temperature window, avoids catalyst to occur the phenomenon such as coking, scaling loss, and reduce the discharge capacity of nitrogen oxide and the escape amount of ammonia.
In addition, when burner hearth underrun, the flue-gas temperature of furnace outlet is too low, and after economizer, flue-gas temperature reduces further, will be very undesirable at the reaction efficiency in SCR region.And the setting of auxiliary flue makes flue gas avoid the heat exchange of economizer or other heat exchangers, part high-temperature flue gas is directly sent to SCR reaction unit region, to improve the temperature of SCR conversion zone.
The utility model, by changing flue inner passage, just can realize the lifting of SNCR and SCR region flue-gas temperature, heat without using miscellaneous equipment to flue gas again, economize energy, reduces energy consumption, is also convenient to transformation.Meanwhile, the flue gas in flue inside regulates, and has promptness, the features such as maneuverability is strong.
Accompanying drawing explanation
Fig. 1 is the structural representation of this utility model.
In figure: 1-burner hearth, 2-aerosol spraying grid, 3-ammonia-spraying grid, 4-horizontal flue, 5-gas baffle, 6-flue collector, 7-No. bis-gas baffles, 8-auxiliary flue, 9-high-temperature heat-exchanging, 10-No. bis-auxiliary flues, 11-cryogenic heat exchanger, 12-economizer, 13-shield body, 14-SCR reaction unit, 15-air preheater, 16-deduster, 17-booster fan, 18-chimney, 19-Returning pipe, 20-return baffle plate, 21-ammoniacal liquor pipeline.
Detailed description of the invention
It should be understood that above-mentioned accompanying drawing and not true to scale, and be only used for the sketch of the multiple preferred feature that the utility model general principle is described.Design feature disclosed in the utility model, such as size, direction, location and shape are determined according to embody rule and environment for use.In addition, in the following description, term is all restricted to for flue gas flow direction as "front", "rear", " before ", " afterwards ", " front end ", " rear end " etc. describe.
Below in conjunction with Fig. 1, specific embodiment of the utility model is described in detail.
The boiler of thermal power plant is for the coal charge that burns, and this boiler can be such as fluidized-bed combustion boiler.Flue gas in fire coal enters horizontal flue 4 from the outlet of burner hearth 1.In horizontal flue 4, vertically arrange ammonia-spraying grid 3, it is communicated with ammoniacal liquor pipeline 21.Ammonia-spraying grid 3 is made up of cancellated pipeline, and each mesh node has a nozzle, is used for spraying ammoniacal liquor in horizontal flue, and the ammoniacal liquor rapid thermal decomposition of injection becomes ammonia, generates nitrogen and steam with the reaction of nitrogen oxides in flue gas.Ammonia-spraying grid 3 can ensure the Homogeneous phase mixing of ammonia and flue gas, and the ratio of ammoniacal liquor and nitrogen oxide distributes along flue sectional uniform.Therefore, the conversion zone of SNCR is horizontal flue 4 region after ammonia-spraying grid 3.In addition, ammonia-spraying grid 3 also can be arranged on the side wall of burner hearth 1 top.Subsequently, flue gas enters flue collector 6 through horizontal flue 4.In flue collector 6, be disposed with economizer 12, SCR reaction unit 14 and air preheater 15.Have out of stock catalyst layer in SCR reaction unit 14, its form can be honeycomb fashion common in this area, board-like or corrugated plate dst etc.Economizer 12 utilizes the water in high-temperature flue gas and pipeline to carry out heat exchange, and reduce flue-gas temperature, temperature drop is about about 220 DEG C, improves boiler feed water temperature simultaneously.Air preheater 15 utilizes flue gas and air to carry out heat exchange, and the air after heating enters burner hearth through powder feed system.The effect of these two devices is all the waste heat utilizing tail flue gas, improves the temperature entering the water and air of boiler, thus improves boiler efficiency, reaches the effect of energy-saving and emission-reduction.The outlet of flue collector 6 is connected with chimney 18, and the flue gas of denitration is entered in air by chimney 18.
Also comprise flue gas return mechanism according to flue gas denitrification system of the present utility model, it comprises Returning pipe 19, for being back in horizontal flue 4 by the flue gas before entering chimney, preferably, is back to by flue gas in the horizontal flue 4 before ammonia-spraying grid 3.What flue gas return mechanism also comprised the entrance being arranged on Returning pipe 19 returns baffle plate 20.
In another embodiment, Returning pipe 19 is provided with aerosol spraying grid 2 with the junction of horizontal flue 4, and aerosol spraying grid 2 is vertically set in horizontal flue 4, and the flue gas returned enters horizontal flue 4 by aerosol spraying grid 2.The structure of aerosol spraying grid 2 is similar to ammonia-spraying grid 3, to ensure to return flue gas being uniformly distributed in horizontal flue 4.
In another embodiment, be provided with booster fan 17 in flue gas Returning pipe 19 to accelerate the flow velocity of flue gas, accelerate heat exchange to reduce the temperature returning flue gas simultaneously.
In another embodiment, be provided with high-temperature heat-exchanging 9 and cryogenic heat exchanger 11 between the entrance of flue collector 6 and economizer 12, high-temperature heat-exchanging 9 can before or after cryogenic heat exchanger 11.Flue gas is about 70 DEG C and 230 DEG C respectively through the temperature drop of high-temperature heat-exchanging 9 and cryogenic heat exchanger 11.
When burner hearth normally runs, flue gas is approximately 980 DEG C in the temperature in burner hearth 1 exit, and be in the ideal response temperature range 900 DEG C-1100 DEG C of SNCR, therefore, the reaction efficiency in SNCR region is higher.Flue gas is after economizer 12, and temperature drops to 300 DEG C-400 DEG C, the ideal temperature region of SCR reaction unit 14 further.Through the effective denitration of two-stage, the nitrous oxides concentration in flue gas can be made to meet discharging standards.Now, without the need to using the flue gas return mechanism in this flue gas denitrification system.
But, when burner hearth 1 heavy-duty service, the temperature of flue gas at furnace outlet place can reach 1150 DEG C-1200 DEG C, and this temperature is more than the ideal response temperature range of SNCR, and the denitration efficiency of SNCR will significantly reduce, now, can open and return baffle plate 20, flue gas lower for the temperature after air preheater 15 is back to horizontal flue 4, and mix with the high-temperature flue gas in this flue, to reduce the flue-gas temperature of SNCR conversion zone, thus effectively improve the denitration efficiency of SNCR.
In another embodiment, flue gas denitrification system of the present utility model also comprises deduster 16, is arranged between the outlet of flue collector 6 and Returning pipe 19 entrance.Deduster 16 can reduce particulate or the dust of denitration flue gas, also has Insulation, and temperature drop, within 10 DEG C, is beneficial to returning of low-temperature flue gas further.
In another embodiment, flue gas denitrification system of the present utility model also comprises the flue gas shunting device for shunting the partial fume in horizontal flue 4.Described flue gas shunting device comprises at least one auxiliary flue (shown in Fig. 1 is an auxiliary flue 8 and No. two auxiliary flues 10), at least one gas baffle (shown in Fig. 1 is a gas baffle 5 and No. two gas baffles 7) and at least one shield body 13, dividing plate is set in flue collector 6 to form auxiliary flue, dividing plate extends to economizer 12 rear end from flue collector 6 porch, gas baffle is arranged on the porch of auxiliary flue, the entrance of described auxiliary flue is connected with the pilot outlet of horizontal flue 4, the entrance of flue collector 6 is connected with the primary outlet of horizontal flue 4, the inwall that described shield body 13 is arranged on flue collector 6 is positioned at the end of described auxiliary flue, the high-temperature flue gas in auxiliary flue is used for be inducted in flue collector 6, and mix with the low-temperature flue gas in flue collector 6, to improve the temperature of SCR conversion zone.
In another embodiment, described flue gas shunting device comprises at least one auxiliary flue (shown in Fig. 1 is an auxiliary flue 8 and No. two auxiliary flues 10) and at least one gas baffle (shown in Fig. 1 is a gas baffle 5 and No. two gas baffles 7), gas baffle is arranged on the porch of auxiliary flue, the entrance of auxiliary flue is connected with the pilot outlet of horizontal flue 4, the outlet of auxiliary flue and flue collector is connected and between economizer 12 and SCR reaction unit 14, the entrance of flue collector 6 is connected with the primary outlet of horizontal flue 4.
When burner hearth 1 underrun, flue gas is only 780 DEG C-810 DEG C in the temperature in burner hearth 1 exit, lower than the ideal response temperature range of SNCR.Therefore, denitrating flue gas mainly relies on SCR reaction unit 14.But when these low-temperature flue gas are after economizer 12, temperature can reduce, further even lower than the ideal response temperature range (300 DEG C ~ 400 DEG C) of SCR.Therefore, the effect of auxiliary flue is the flue gas heat exchange in order to avoid economizer, before part high-temperature flue gas is directly delivered to SCR reaction unit 14, mixes with the flue gas after heat exchange, raises the temperature of SCR conversion zone, thus improves its denitration efficiency.The auxiliary flue of prior art is in the outside of flue collector, and in order to isolate SCR section flue gas, and auxiliary flue of the present utility model is inner at flue collector, effectively can prevent the row of stealing of non-denitration flue gas.
Above embodiment only as an example, does not play restriction effect to scope of the present utility model.Those skilled in the art on this basis, in the protection domain of claim of the present utility model, can be contemplated to other embodiment that can realize identical function.
Those skilled in the art grasp various embodiments and various deformation and improvement.Especially, need it is clear that, except obvious contradiction or incompatible situation, above-mentioned feature of the present utility model, mode of texturing and/or specific embodiment can be combined with each other.All these embodiments and distortion and improve and all belong to protection domain of the present utility model.
Claims (10)
1. a SNCR-SCR combines flue gas denitrification system, comprise horizontal flue (4), the flue collector (6) that horizontal flue (4) is connected, the chimney (18) be connected with the outlet of flue collector (6), wherein, ammonia-spraying grid (3) is provided with in described horizontal flue (4), SCR reaction unit (14) is provided with in described flue collector (6), it is characterized in that, described system also comprises flue gas return mechanism, be arranged between described flue collector (6) and described chimney (18), for optionally the flue gas flowing out flue collector (6) being back to described horizontal flue (4).
2. flue gas denitrification system according to claim 1, it is characterized in that, described flue gas return mechanism comprises Returning pipe (19) and returns baffle plate (20), one end of described Returning pipe (19) is connected between flue collector (6) and chimney (18), the other end is connected with the horizontal flue (4) before ammonia-spraying grid (3), describedly return the entrance that baffle plate (20) is arranged on Returning pipe (19), when the flue-gas temperature entering horizontal flue (4) is higher than 1100 DEG C, baffle plate (20) is returned described in opening, so that the flue gas that flue collector (6) is discharged turns back to horizontal flue (4).
3. flue gas denitrification system according to claim 2, is characterized in that, described Returning pipe (19) is provided with aerosol spraying grid (2) with the junction of horizontal flue (4), and the flue gas returned enters horizontal flue (4) by aerosol spraying grid (2).
4. flue gas denitrification system according to claim 3, is characterized in that, is provided with booster fan (17) in described Returning pipe (19).
5. the flue gas denitrification system according to any one of claim 1-4, it is characterized in that, economizer (12) and air preheater (15) is provided with in described flue collector (6), wherein, before described economizer (12) is positioned at SCR reaction unit (14), after described air preheater (15) is positioned at SCR reaction unit (14).
6. flue gas denitrification system according to claim 5, is characterized in that, in the flue collector (6) before economizer (12), is provided with high-temperature heat-exchanging (9) and cryogenic heat exchanger (11).
7. flue gas denitrification system according to claim 6, is characterized in that, between the outlet and Returning pipe (19) entrance of described flue collector (6), be provided with deduster (16).
8. flue gas denitrification system according to claim 7, is characterized in that, described system also comprises flue gas shunting device, for shunting the partial fume in horizontal flue (4).
9. flue gas denitrification system according to claim 8, it is characterized in that, described flue gas shunting device comprises at least one auxiliary flue, at least one gas baffle and at least one shield body (13), dividing plate is set in flue collector (6) to form auxiliary flue, described dividing plate extends to economizer (12) rear end from flue collector (6) porch, gas baffle is arranged on the porch of auxiliary flue, the entrance of described auxiliary flue is connected with the pilot outlet of horizontal flue (4), the entrance of flue collector (6) is connected with the primary outlet of horizontal flue (4), the inwall that described shield body (13) is arranged on flue collector (6) is positioned at the end of described auxiliary flue.
10. flue gas denitrification system according to claim 8, it is characterized in that, described flue gas shunting device comprises at least one auxiliary flue and at least one gas baffle, described gas baffle is arranged on the porch of auxiliary flue, the entrance of auxiliary flue is connected with the pilot outlet of horizontal flue (4), outlet and the flue collector (6) of auxiliary flue are connected and are positioned between economizer (12) and SCR reaction unit (14), and the entrance of flue collector (6) is connected with the primary outlet of horizontal flue (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520289677.1U CN204656310U (en) | 2015-05-07 | 2015-05-07 | A kind of SNCR-SCR combines flue gas denitrification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520289677.1U CN204656310U (en) | 2015-05-07 | 2015-05-07 | A kind of SNCR-SCR combines flue gas denitrification system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204656310U true CN204656310U (en) | 2015-09-23 |
Family
ID=54126748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520289677.1U Active CN204656310U (en) | 2015-05-07 | 2015-05-07 | A kind of SNCR-SCR combines flue gas denitrification system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204656310U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105509081A (en) * | 2016-01-28 | 2016-04-20 | 杜梦凡 | System and process for denitration by spraying ammonia gas in large-sized boiler high-temperature flue gas area |
| CN105521693A (en) * | 2015-11-20 | 2016-04-27 | 尹国庆 | Apparatus and method for treating flue gas in glass kiln through selective non-catalytic reduction process (SNCR) |
| CN106178870A (en) * | 2015-05-07 | 2016-12-07 | 嘉兴新嘉爱斯热电有限公司 | A kind of SNCR-SCR combines flue gas denitrification system |
| CN107185376A (en) * | 2017-06-14 | 2017-09-22 | 山西大学 | A kind of flue gas reuse reinforcing SNCR combines SCR denitrating system |
-
2015
- 2015-05-07 CN CN201520289677.1U patent/CN204656310U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106178870A (en) * | 2015-05-07 | 2016-12-07 | 嘉兴新嘉爱斯热电有限公司 | A kind of SNCR-SCR combines flue gas denitrification system |
| CN106178870B (en) * | 2015-05-07 | 2019-01-08 | 嘉兴新嘉爱斯热电有限公司 | A kind of SNCR-SCR joint flue gas denitrification system |
| CN105521693A (en) * | 2015-11-20 | 2016-04-27 | 尹国庆 | Apparatus and method for treating flue gas in glass kiln through selective non-catalytic reduction process (SNCR) |
| CN105509081A (en) * | 2016-01-28 | 2016-04-20 | 杜梦凡 | System and process for denitration by spraying ammonia gas in large-sized boiler high-temperature flue gas area |
| CN105509081B (en) * | 2016-01-28 | 2017-11-17 | 杜梦凡 | Spray ammonia denitrating system and denitrating technique in large-sized boiler high-temperature flue gas region |
| CN107185376A (en) * | 2017-06-14 | 2017-09-22 | 山西大学 | A kind of flue gas reuse reinforcing SNCR combines SCR denitrating system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111450681B (en) | Denitration, desulfurization and dust removal integrated system for supercritical carbon dioxide coal-fired boiler | |
| CN102966945B (en) | Reduce the method for biomass recirculating fluidized bed boiler discharged nitrous oxides | |
| CN204656310U (en) | A kind of SNCR-SCR combines flue gas denitrification system | |
| CN102179171B (en) | Multi-stage themolysis coupled denitration method using front flow field uniformizing device and device thereof | |
| CN201524525U (en) | SCR flue gas denitrating device | |
| CN107642793A (en) | Prevent ammonium hydrogen sulfate from blocking the system and method for air preheater after SCR denitration transformation | |
| CN101773781B (en) | Method for realizing SNCR and SCR combined denitration by using coal-fired boiler | |
| CN102512953A (en) | CFB boiler SCR denitration technology and denitration device | |
| CN202884903U (en) | Biomass circulating fluidized bed combustion equipment with low nitrogen oxide emission | |
| CN207268458U (en) | The system for preventing ammonium hydrogen sulfate from blocking air preheater after SCR denitration transformation | |
| CN108434964A (en) | A kind of matrix form injection apparatus for circulating fluidized bed boiler SNCR denitration system | |
| CN213132673U (en) | Grate-rotary kiln pelletizing flue gas classification denitrification facility | |
| CN108579360A (en) | A kind of coke oven regenerator UTILIZATION OF VESIDUAL HEAT IN couples method of denitration and device with SNCR/SCR | |
| CN104266217A (en) | Grate-fired furnace multipath denitration system and denitration method thereof | |
| CN106178870B (en) | A kind of SNCR-SCR joint flue gas denitrification system | |
| CN206858496U (en) | A kind of activating and reducing combustion with meagre oxygen system | |
| CN111981473A (en) | Slag burnout system and method of biomass boiler | |
| CN111804138A (en) | Biomass boiler flue gas denitration system and application process thereof | |
| CN202715356U (en) | Low temperature selective catalytic reduction (SCR) static bed flue gas denitration device of horizontal type heat recovery boiler | |
| CN208612147U (en) | A kind of cement industry dedusting denitration device | |
| CN103175408A (en) | Industrial furnace comprehensive energy saving and emission reduction integrated system | |
| CN109058983A (en) | Recirculating fluidized bed combustion with meagre oxygen catalysis oxidation fractional combustion boiler system and method | |
| CN111450682B (en) | Deep denitration process for supercritical carbon dioxide coal-fired boiler | |
| CN210356701U (en) | Novel power plant boiler SCR deNOx systems | |
| CN207805389U (en) | Cigarette temperature raising denitrification apparatus is mixed in a kind of stove |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |