CN210171225U - Device for on-line regeneration of catalyst in Selective Catalytic Reduction (SCR) denitration by partition - Google Patents
Device for on-line regeneration of catalyst in Selective Catalytic Reduction (SCR) denitration by partition Download PDFInfo
- Publication number
- CN210171225U CN210171225U CN201920450247.1U CN201920450247U CN210171225U CN 210171225 U CN210171225 U CN 210171225U CN 201920450247 U CN201920450247 U CN 201920450247U CN 210171225 U CN210171225 U CN 210171225U
- Authority
- CN
- China
- Prior art keywords
- pipe
- flue gas
- catalyst
- smoke
- scr
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The utility model discloses a device for on-line regeneration of catalyst subareas in SCR denitration, the top and the bottom of an SCR reactor are respectively connected with a smoke inlet pipe and a smoke outlet pipe, a plurality of parallel smoke branch pipes are arranged in the SCR reactor, each smoke branch pipe is communicated with the smoke inlet pipe, the smoke outlet pipe is communicated with one end of a smoke return pipe, a heat exchanger for heating smoke is connected in the smoke return pipe, the other end of the smoke return pipe is communicated with a hot air main pipe, the hot air main pipe sequentially passes through the parallel smoke branch pipes, each smoke branch pipe at least contains a hot air branch pipe, the SCR reactor is divided into a plurality of smoke through areas corresponding to the positions of the hot air branch pipes by vertical clapboards, a plurality of catalyst layers are arranged in the smoke through areas in parallel and horizontally separated manner, and the device for on-line regeneration of catalyst subareas in SCR denitration sequentially regenerates and cleans each smoke through area of the catalyst layers, the life of the catalyst layer is improved.
Description
Technical Field
The utility model relates to a catalyst washs regeneration technical field in the SCR denitration, particularly, relates to a device of catalyst subregion online regeneration in SCR denitration.
Background
With the rapid development of economy in China, the pollution degree of the atmosphere is increasingly intensified. In China, dust emission control and flue gas desulfurization technologies are mature day by day, dust collection and flue gas desulfurization projects are performed orderly, however, the requirements on national environmental protection are more and more strict, the control standard of nitrogen oxides is gradually strict, and the SNCR denitration technology of the existing cement kiln cannot meet the requirements of the current environmental protection emission standard. NO of cement kilnxThe emission reduction SCR denitration treatment just starts, so the research on the SCR denitration work of the cement kiln has important significance on the atmospheric pollution treatment.
At present, SCR denitration is classified according to the flue gas temperature condition that the catalyst is suitable for, and the SCR technology can be generally divided into according to different temperatures: high temperature, medium and low temperature. The high temperature SCR generally means that the applicable temperature of the catalyst is 450-450 ℃ or above, the medium temperature SCR means that the applicable temperature of the catalyst is 320-450 ℃, the medium temperature SCR means that the applicable temperature of the catalyst is 180-300 ℃, and the low temperature SCR means that the applicable temperature of the catalyst is 80-150 ℃. At present, the medium-temperature catalyst with the operation temperature of 320-450 ℃ is widely applied in industry, the medium-temperature SCR in cement enterprises is arranged in front of a waste heat boiler behind the outlet of a kiln tail preheater C1, but the dust concentration is as high as 80-100 g/Nm3The catalyst is easy to cause pore blockage, abrasion and poisoning and can not run, the low-temperature SCR denitration is arranged behind a tail fan, the temperature is 180-220 ℃, and the dust is 20-50g/Nm3. The temperature interval meets the temperature condition of the low-temperature catalyst, but in the process of low-temperature SCR denitration reaction, SO exists in flue gas2、SO3Ammonium bisulfate is generated after ammonia injection, is an extremely viscous material, is adhered to the surface of the catalyst and continues to adhere to fly ash particles, so that the SCR catalyst is deposited and blocked, and the ammonium bisulfateThe fly ash is a dry powdery material, and when more fly ash is generated, the fly ash concentration in the flue gas is increased, and the abrasion of the catalyst is aggravated. The SCR denitration of cement enterprises is not advanced just for the reasons.
SO3With NH in the flue gas3The reaction formula is as follows:
NH3＋SO3＋H2O→NH4HSO4
this reaction type reversible reaction, when the temperature is higher than 350 ℃, this reaction type is reverse to go on, if can utility model a technology restraines the formation of ammonium bisulfate or makes ammonium bisulfate decompose, can keep the catalyst in the high efficiency state, improves the catalyst life-span, will be the gospel of cement enterprise.
Disclosure of Invention
The utility model discloses aim at solving above-mentioned technical problem to a certain extent.
In view of this, the utility model provides a catalyst subregion device of regeneration on line in SCR denitration, catalyst subregion device of regeneration on line in this SCR denitration is to every area of leading to the cigarette of catalyst layer regeneration and washing in proper order, improves the life-span of catalyst layer.
In order to solve the technical problem, the utility model provides a catalyst subregion is regenerated device on line in SCR denitration, the top and the bottom of SCR reactor are connected respectively and are advanced tobacco pipe and play tobacco pipe, set up a plurality of parallel flue gases in the SCR reactor and divide the pipe, every the flue gas divide the pipe all with advance the tobacco pipe intercommunication, go out the one end of tobacco pipe intercommunication flue gas back flow, the heat exchanger that is used for heating the flue gas is connected to the flue gas back flow in-connection, the hot-blast house steward of other end intercommunication of flue gas back flow, hot-blast house steward passes a plurality of side by side in proper order the flue gas divides the pipe, every the flue gas divides the hot-blast branch pipe of pipe at least holding, the SCR reactor separate through vertical baffle become a plurality of with the logical cigarette region that hot-blast branch pipe position corresponds, it is a plurality of the parallel and horizontal separation of catalyst layer sets up.
Further, each smoke passing area is provided with a soot blower.
Further, each catalyst layer all is equipped with spare catalyst layer, spare catalyst layer sets up the below of catalyst layer.
Further, the flue gas return pipe is also connected with a fan and a bag-type dust collector, and the bag-type dust collector, the fan and the heat exchanger are sequentially arranged along the flowing direction of the flue gas in the flue gas return pipe.
Further, the SCR reactor is arranged behind the fan.
Further, the flue gas is in charge of, hot-blast house steward with hot-blast branch pipe all is equipped with electric gate valve, electric gate valve passes through remote control ware control.
The technical effects of the utility model reside in that: (1) go out the one end of tobacco pipe intercommunication flue gas back flow, flue gas back flow in-connection has the heat exchanger that is used for heating the flue gas, the other end intercommunication hot-blast house steward of flue gas back flow, every flue gas is divided and is managed at least hot-blast branch pipe of holding, the SCR reactor is separated into a plurality of logical cigarette regions that correspond with hot-blast branch pipe position through vertical baffle, the parallel and horizontal separation of a plurality of catalyst layers sets up in logical cigarette region, flue gas circulation uses, reduces the energy consumption, reduce investment and running cost.
(2) The fan sets up in the export return line department of SCR reactor, avoids not having the flue gas that carries out the denitration through hot-blast branch pipe entering hot-blast main.
(3) The flue gas branch pipe, the hot air main pipe and the hot air branch pipe are respectively provided with an electric gate valve, the electric gate valves are controlled by a remote controller, the electric gate valves are controlled by the remote controller, and NH (NH) of each smoke passing area is sequentially controlled4HSO4Decomposition is carried out while keeping the rest free of NH4HSO4And denitration is carried out on the decomposed smoke passing areas, and each smoke passing area of the catalyst layer is regenerated and cleaned in sequence, so that the service life of the catalyst layer is prolonged.
Drawings
Fig. 1 is a schematic structural diagram of an apparatus for partitioned online regeneration of a catalyst in SCR denitration according to the present invention.
Wherein, 1-smoke passing area; 2-a catalyst layer; 3-an SCR reactor; 4-smoke inlet pipe; 5, discharging the smoke tube; 6-a flue gas return pipe; 7-a heat exchanger; 8-a hot air main pipe; 9-a separator; 10-electric gate valve; 11-spare catalyst layer; 12-a fan; 13-bag dust collector; 41-flue gas branch pipe; 81-hot air branch pipe.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.
As shown in FIG. 1, a device for zoned online regeneration of catalyst in SCR denitration, wherein the top and the bottom of an SCR reactor 3 are respectively connected with a smoke inlet pipe 4 and a smoke outlet pipe 5, a plurality of parallel smoke branch pipes 41 are arranged in the SCR reactor 3, each smoke branch pipe 41 is communicated with the smoke inlet pipe 4, the smoke outlet pipe 5 is communicated with one end of a smoke return pipe 6, a heat exchanger 7 for heating smoke is connected in the smoke return pipe 6, the other end of the smoke return pipe 6 is communicated with a hot air main pipe 8, the hot air main pipe 8 sequentially passes through the plurality of parallel smoke branch pipes 41, each smoke branch pipe 41 at least accommodates a hot air branch pipe 81, the SCR reactor 3 is divided into a plurality of smoke passing areas 1 corresponding to the positions of the hot air branch pipes 81 by a vertical partition plate 9, a plurality of catalyst layers 2 are arranged in the smoke passing areas 1 in parallel and horizontally separated manner, the smoke branch pipes 41, the hot air main pipe 8 and the hot air branch pipes 81, the electric gate valve 10 is controlled by a remote controller.
According to the specific embodiment of the utility model, a catalyst subregion device of regenerating on line in SCR denitration, SCR reactor 3's top is connected into tobacco pipe 4, it divides pipe 41 to set up a plurality of parallel flue gases in SCR reactor 3, every flue gas divides pipe 41 all with advance tobacco pipe 4 intercommunication, set up a plurality of catalyst layers 2 in SCR reactor 3, a tobacco pipe 5 is connected out to SCR reactor 3's bottom, the flue gas gets into from advancing tobacco pipe 4, divide through a plurality of parallel flue gases to manage 41 and get into SCR reactor 3, in flue gas and the SCR reactor 3 NH in the catalyst layer 23Denitration is carried out by reaction, and NH is generated at the same time4HSO4The clean flue gas is attached to the catalyst layer 2, and the denitrated clean flue gas is discharged from the flue gas outlet pipe 5.
The smoke outlet pipe 5 is communicated with the smoke return pipe 6One end, the heat exchanger 7 that is used for heating clean flue gas is connected to flue gas backflow pipe 6 in, the other end intercommunication hot-blast house steward 8 of flue gas backflow pipe 6, hot-blast house steward 8 passes a plurality of flue gas branch pipes 41 that parallel in proper order, every flue gas branch pipe 41 holds a hot-blast branch pipe 81 at least, partial clean flue gas lets in back flow pipe 6, heat exchanger 7 in the back flow pipe 6 heats clean flue gas, the clean flue gas after the heating lets in hot-blast house steward 8, then get into SCR reactor 3 from hot-blast branch pipe 81, make catalyst layer 2's NH4HSO4Is increased in temperature and thus on NH4HSO4The flue gas is decomposed to be recycled, so that the energy consumption is reduced, and the investment and the operation cost are reduced.
SCR reactor 3 separates into a plurality of logical cigarette region 1 that correspond with hot-blast branch pipe 81 position through vertical baffle 9, and a plurality of catalyst layer 2 are parallel and horizontal separation sets up in logical cigarette region 1, and the flue gas is divided pipe 41, hot-blast house steward 8 and hot-blast branch pipe 81 and all is equipped with electric gate valve 10, and electric gate valve 10 passes through remote controller control, through remote controller control electric gate valve 10, makes every NH that leads to cigarette region 1 in proper order4HSO4Decomposition is carried out while keeping the rest free of NH4HSO4The decomposed smoke passing region 1 is denitrated, and the smoke passing region 1 is sequentially regenerated and cleaned, so that the service life of the catalyst layer 2 is prolonged.
As shown in fig. 1, each sootblower area 1 is provided with a sootblower.
According to the utility model discloses a concrete embodiment, the soot blower blows off the dust on 2 surfaces on catalyst layer, keeps denitration reaction's normal operating.
As shown in fig. 1, each catalyst layer 2 is provided with a spare catalyst layer 11, and the spare catalyst layer 11 is disposed below the catalyst layer 11.
According to the utility model discloses a specific embodiment, when catalyst layer 2 stopped to use because of reasons such as trouble, start reserve catalyst layer 11, keep the reaction normal operating in SCR reactor 3.
As shown in fig. 1, the flue gas return pipe 6 is further connected with a fan 12 and a bag-type dust collector 13, and the bag-type dust collector 13, the fan 12 and the heat exchanger 7 are sequentially arranged along the flow direction of the flue gas in the flue gas return pipe 6.
According to the specific embodiment of the utility model, clean flue gas passes through sack cleaner 13, fan 12 and heat exchanger 7 in proper order, and in clean flue gas passed through fan 12 entering flue gas back flow 6, the flow that makes clean flue gas provided power, and sack cleaner 13 removes dust to clean flue gas, avoids the high concentration dust to get into SCR reactor 3 in, causes the secondary to block up catalyst layer 2.
As shown in fig. 1, the SCR reactor 3 is disposed behind the fan 12.
According to the utility model discloses a specific embodiment makes flue gas in SCR reactor 3 be in the malleation state all the time, avoids not having carried out the flue gas of denitration in hot-blast branch pipe 81 gets into hot-blast house steward 8, has guaranteed the normal operating of equipment.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.
Claims (6)
1. The utility model provides a device of online regeneration of catalyst subregion in SCR denitration, SCR reactor's top and bottom are connected respectively into tobacco pipe and are gone out the tobacco pipe, its characterized in that, set up a plurality of parallel flue gas in the SCR reactor and divide the pipe, every the flue gas divide the pipe all with advance the tobacco pipe intercommunication, go out the one end of tobacco pipe intercommunication flue gas back flow, the heat exchanger that is used for heating the flue gas is connected to the flue gas back flow in, the other end intercommunication hot-blast main of flue gas back flow, hot-blast main passes a plurality of parallels in proper order the flue gas divides the pipe, every the flue gas divides the pipe to hold a hot-blast branch pipe at least, the SCR reactor is separated into a plurality ofly through vertical baffle with the logical cigarette region that hot-blast branch pipe position corresponds, and the parallel and horizontal separation of a plurality of catalyst layers sets up in.
2. The device for zoned online regeneration of a catalyst in SCR denitration of claim 1, wherein each of the smoke passing areas is provided with a soot blower.
3. The device for zoned online regeneration of a catalyst in SCR denitration of claim 1, wherein each of the catalyst layers is provided with a spare catalyst layer disposed below the catalyst layer.
4. The device for zoned online regeneration of the catalyst in SCR denitration of claim 1, wherein the flue gas return pipe is further connected with a fan and a bag-type dust collector, and the bag-type dust collector, the fan and the heat exchanger are sequentially arranged along a flow direction of flue gas in the flue gas return pipe.
5. The device for zoned online regeneration of the catalyst in SCR denitration of claim 4, wherein the SCR reactor is disposed behind the fan.
6. The device for zoned online regeneration of the catalyst in SCR denitration of claim 1, wherein the flue gas branch pipe, the hot air main pipe and the hot air branch pipe are all provided with an electric gate valve, and the electric gate valves are controlled by a remote controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920450247.1U CN210171225U (en) | 2019-04-04 | 2019-04-04 | Device for on-line regeneration of catalyst in Selective Catalytic Reduction (SCR) denitration by partition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920450247.1U CN210171225U (en) | 2019-04-04 | 2019-04-04 | Device for on-line regeneration of catalyst in Selective Catalytic Reduction (SCR) denitration by partition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210171225U true CN210171225U (en) | 2020-03-24 |
Family
ID=69830499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920450247.1U Expired - Fee Related CN210171225U (en) | 2019-04-04 | 2019-04-04 | Device for on-line regeneration of catalyst in Selective Catalytic Reduction (SCR) denitration by partition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210171225U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115106035A (en) * | 2022-07-04 | 2022-09-27 | 福州大学 | Micro-channel reactor for ammonia decomposition |
-
2019
- 2019-04-04 CN CN201920450247.1U patent/CN210171225U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115106035A (en) * | 2022-07-04 | 2022-09-27 | 福州大学 | Micro-channel reactor for ammonia decomposition |
| CN115106035B (en) * | 2022-07-04 | 2023-12-05 | 福州大学 | Microchannel reactor for ammonia decomposition |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4871522A (en) | Combined catalytic baghouse and heat pipe air heater | |
| CN104162352B (en) | A kind of glass furnace fume dedusting, denitration, desulfurization integrated handling process | |
| CN109966919A (en) | The device and method of catalyst sections on-line regeneration in SCR denitration | |
| CN202478810U (en) | Device for purifying and recovering waste gas of industrial furnace | |
| US4925633A (en) | Combined catalytic baghouse and heat pipe air heater | |
| CN103406006A (en) | SCR (Selective Catalytic Reduction) denitration device for NOx control of rotary cement kiln | |
| CN209828672U (en) | Grate-rotary kiln SNCR/SCR denitration and active coke desulfurization combined system | |
| CN110075681B (en) | Dry desulfurization and denitrification device and method suitable for cement kiln flue gas | |
| CN105457475B (en) | Flue gas desulfurization and denitrification systematization device | |
| CN203494378U (en) | SCR (Selective Catalytic Reduction) denitration device for controlling NOx of rotary cement kiln | |
| CN106123613B (en) | A kind of glass furnace cigarette advanced purification process | |
| CN109876662A (en) | SCR denitration system and method for denitration suitable for cement producing line kiln exit gas | |
| CN203625223U (en) | Comprehensive smoke treatment device applied to container glass kiln | |
| CN105107330A (en) | Integrated device for ultralow emission of flue gas, dust and NOX | |
| CN210171225U (en) | Device for on-line regeneration of catalyst in Selective Catalytic Reduction (SCR) denitration by partition | |
| CN208130826U (en) | A kind of dust removal integrated equipment of desulphurization denitration | |
| CN219539931U (en) | Device for realizing dry desulfurization of flue gas by utilizing metal filter bag dust removal | |
| CN210473618U (en) | Low temperature SCR denitrification facility in steel rolling heating furnace flue gas dry desulfurization | |
| CN108261918A (en) | A kind of dust removal integrated equipment of desulphurization denitration and technique | |
| CN214809741U (en) | Multi-bin dust remover multi-bin SCR and catalyst activation integrated device | |
| CN210486528U (en) | Industrial silicon flue gas purification system | |
| CN113230849A (en) | Multi-bin dust remover multi-bin SCR and catalyst activation integrated device and using method thereof | |
| CN206103709U (en) | Glass high -temperature furnace flue gas energy saving and emission reduction clean system | |
| CN105935544B (en) | A kind of efficient stable glass furnace cigarette advanced purification process | |
| CN109395579A (en) | A kind of outer pre-heating system of coke oven combustion air |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200324 |