CN217163880U - Device for preventing regenerated particulate matter of low-temperature SCR denitration catalyst from exceeding standard - Google Patents
Device for preventing regenerated particulate matter of low-temperature SCR denitration catalyst from exceeding standard Download PDFInfo
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- CN217163880U CN217163880U CN202220645377.2U CN202220645377U CN217163880U CN 217163880 U CN217163880 U CN 217163880U CN 202220645377 U CN202220645377 U CN 202220645377U CN 217163880 U CN217163880 U CN 217163880U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Abstract
The utility model discloses mainly be applied to environmental protection technical field, in particular to prevent device that low temperature SCR denitration catalyst regenerated particles matter exceeds standard, including main road flue and bypass flue, set up the cooler on the main road flue, the cooler both ends set up the valve respectively, and the both ends of bypass flue and the tie point of main road flue set up respectively in the main road flue both ends valve outside, and the bypass flue both ends set up the business turn over valve respectively, set up the draught fan on the main road flue, and the draught fan is located the bypass flue export outside, draught fan intercommunication chimney, and belt cleaning device and waste fitting discharging are connected respectively to the cooler. The utility model discloses an ammonium bisulfate condensation in the cooler messenger flue gas, the risk that the particulate matter exceeds standard when having avoided low temperature SCR catalyst regeneration. The axial flow fan can realize stable temperature of the flue gas at the outlet of the cooler through frequency conversion adjustment, and ensure condensation of ammonium bisulfate. After the flue gas is cooled, the air quantity of the draught fan is reduced, and the power consumption of the draught fan during operation is reduced.
Description
Technical Field
The utility model relates to a device for preventing low temperature SCR denitration catalyst regenerated particles matter exceeds standard mainly is applied to environmental protection technical field.
Background
Compared with the flue gas with the temperature of 320 plus 400 ℃ of a power plant boiler, the flue gas temperature of coking, sintering and the like is lower, and the flue gas temperature conditions of SCR denitration of a traditional power plant can not be matched, so that low-temperature SCR denitration becomes the mainstream of flue gas denitration in the steel industry, but the low-temperature SCR catalyst generates ammonium bisulfate in the operation process and is enriched on the catalyst, and the denitration efficiency is reduced after the low-temperature SCR catalyst is enriched for a certain time. According to the traditional method, the SCR catalyst is usually regenerated through flue gas temperature rise according to a certain period, but the flue gas temperature rise enables ammonium bisulfate enriched on the catalyst to be decomposed, the ammonium bisulfate can be condensed into solid particles again in the process of being discharged into a chimney along with the flue gas, the particles often exceed the standard, and the environmental protection risk is faced.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the device for preventing the regenerated particulate matters of the low-temperature SCR denitration catalyst from exceeding the standard can reduce the energy consumption in normal operation, can realize off-line washing and maintenance of the cooler and can avoid the risk of exceeding the standard of the particulate matters during regeneration of the low-temperature SCR catalyst.
Prevent device that low temperature SCR denitration catalyst regenerated particles matter exceeds standard, including main road flue and bypass flue, set up the cooler on the main road flue, the cooler both ends set up the valve respectively, the both ends of bypass flue and the tie point of main road flue set up respectively in the main road flue both ends valve outside, the bypass flue both ends set up the business turn over valve respectively, set up the draught fan on the main road flue, the draught fan is located the bypass flue export outside, draught fan intercommunication chimney, belt cleaning device and waste fitting discharging are connected respectively to the cooler.
The valves at the two ends of the cooler are respectively a cooler inlet valve and a cooler outlet valve, and the valves at the two ends of the bypass flue are respectively a bypass inlet valve and a bypass outlet valve.
The cooler is of a shell-and-tube heat exchange structure and comprises a shell, tube plates are arranged at two ends in the shell respectively, a heat exchange tube transversely penetrates between the two tube plates, an axial flow fan is arranged at the bottom of the shell, an evacuation port is arranged at the top of the shell, and the axial flow fan and the evacuation port are communicated with a space between the two tube plates of the shell. The heat exchange tube is fixed by the front tube plate and the rear tube plate of the cooler, and the tube plates isolate the flue gas and the air, so that the flue gas and the air indirectly exchange heat through the inside and the outside of the heat exchange tube.
The cleaning device is a high-pressure cleaning machine which is communicated with the heat exchange tubes through pipelines, the bottom of the shell is respectively provided with a drain outlet, and the drain outlets are respectively positioned in the space formed by the outer side of the tube plate and the shell. The high-pressure cleaning machine washes condensed ammonium bisulfate in the pipeline, the washed sewage enters the sewage tank through the sewage discharge outlet and the sewage discharge pipeline, and the sewage in the sewage tank is discharged into a plant sewage treatment system through the sewage discharge pump.
The sewage discharging device comprises a sewage tank, the sewage tank is connected with a sewage discharging pump, and the sewage discharging port is communicated with the sewage tank through a sewage discharging pipeline respectively.
The axial flow fan is a variable frequency axial flow fan. The rotating speed of the motor is adjusted through the frequency converter, so that the air quantity is adjusted.
The heat exchange tubes are arranged in a staggered manner, so that the heat exchange coefficient of the cooler is improved.
The air inlet chamber of the cooler shell is larger than the air outlet chamber, and enough pipeline flushing and overhauling space is reserved.
The cooler shell is a rectangular shell, the left end and the right end of the cooler shell are connected with the flue through square and round joints, the lower part of the cooler shell is connected with the axial flow fan through the square and round joints, and the upper part of the cooler shell is communicated with the atmosphere through a rectangular pipeline.
The utility model has the advantages that:
1. ammonium bisulfate in the flue gas is condensed through the cooler, so that the risk that particulate matters exceed the standard when the low-temperature SCR catalyst is regenerated is avoided.
2. The axial flow fan can realize stable temperature of the flue gas at the outlet of the cooler through frequency conversion adjustment, and ensure condensation of ammonium bisulfate.
3. After the flue gas is cooled, the air quantity of the draught fan is reduced, and the power consumption of the draught fan during operation is reduced.
4. The bypass flue can reduce the energy consumption in normal operation and can realize off-line washing and maintenance of the cooler.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1. the system comprises a low-temperature SCR denitration device, a bypass flue, a bypass inlet valve, a bypass outlet valve, a draught fan, a chimney, a cooler inlet valve, a cooler outlet valve, a cooler, a shell, a tube plate, a heat exchange tube and a drain, wherein the low-temperature SCR denitration device comprises 2 parts of a bypass flue, 3 parts of a bypass inlet valve, 4 parts of a bypass outlet valve, 5 parts of a draught fan, 6 parts of a chimney, 7 parts of a cooler inlet valve, 8 parts of a cooler outlet valve, 9 parts of a cooler, 9-1 parts of a shell, 9-2 parts of a tube plate, 9-3 parts of a heat exchange tube and 9-4 parts of a drain; 9-5 evacuation ports, 10 an axial flow fan, 11 a sewage discharge pipeline, 12 a sewage pool, 13 a sewage discharge pump, 14 a high-pressure cleaning machine and 15 a main path flue.
Detailed Description
The invention will be further described with reference to the accompanying drawings:
as shown in fig. 1, prevent device that low temperature SCR denitration catalyst regenerated particles matter exceeds standard, including main flue 15 and bypass flue 2, set up cooler 9 on main flue 15, the cooler 9 both ends set up the valve respectively, bypass flue 2's both ends and main flue 15's tie point set up respectively in the main flue 15 both ends valve outside, bypass flue 2 both ends set up the business turn over valve respectively, set up draught fan 5 on the main flue 15, draught fan 5 is located the bypass flue 2 export outsides, draught fan 5 intercommunication chimney 6, belt cleaning device and waste fitting discharging are connected respectively to cooler 9. The valves at the two ends of the cooler 9 are a cooler inlet valve 7 and a cooler outlet valve 8 respectively, and the valves at the two ends of the bypass flue 2 are a bypass inlet valve 3 and a bypass outlet valve 4 respectively. The cooler 9 is set to be a shell-and-tube heat exchange structure and comprises a shell 9-1, tube plates 9-2 are respectively arranged at two ends in the shell 9-1, a heat exchange tube 9-3 is transversely arranged between the two tube plates 9-2 in a penetrating mode, an axial flow fan 10 is arranged at the bottom of the shell 9-1, an emptying port 9-5 is arranged at the top of the shell 9-1, and the axial flow fan 10 and the emptying port 9-5 are both communicated with a space between the two tube plates 9-2 of the shell 9-1. The heat exchange tube 9-3 is fixed by the front and rear tube plates 9-2 of the cooler 9, and the tube plates 9-2 isolate the flue gas and the air, so that the flue gas and the air indirectly exchange heat inside and outside the heat exchange tube 9-3. The cleaning device is a high-pressure cleaning machine 14, the high-pressure cleaning machine 14 is communicated with the heat exchange pipes 9-3 through pipelines, the bottom of the shell 9-1 is respectively provided with a sewage discharge outlet 9-4, and the sewage discharge outlets 9-4 are respectively positioned in a space formed by the outer side of the pipe plate 9-2 and the shell 9-1. The high-pressure cleaning machine 14 washes the condensed ammonium bisulfate in the pipeline, the washed sewage enters the sewage tank 12 through the sewage discharge outlet 9-4 and the sewage discharge pipeline 11, and the sewage in the sewage tank 12 is discharged into a factory sewage treatment system through the sewage discharge pump 13. The sewage discharging device comprises a sewage pool 12, the sewage pool 12 is connected with a sewage discharging pump 13, and the sewage discharging ports 9-4 are respectively communicated with the sewage pool 12 through a sewage discharging pipeline 11. The axial flow fan 10 is provided as a variable frequency axial flow fan. The rotating speed of the motor is adjusted through the frequency converter, so that the air quantity is adjusted. The heat exchange tubes 9-3 are arranged in a staggered manner, so that the heat exchange coefficient of the cooler 9 is improved. The air inlet chamber of the cooler shell 9-1 is larger than the air outlet chamber, the cooler shell 9-1 is a rectangular shell with enough pipeline flushing and overhauling space, the left end and the right end are connected with the flue through square and round joints, the lower part is connected with the axial flow fan 10 through the square and round joints, and the upper part is communicated with the atmosphere through a rectangular pipeline.
When the low-temperature SCR denitration device works, the inlet of the main flue 15 is connected with the low-temperature SCR denitration device 1, when a low-temperature SCR catalyst is regenerated, the cooler inlet valve 7 and the cooler outlet valve 8 are opened, the bypass inlet valve 3 and the bypass outlet valve 4 are closed, flue gas passes through the low-temperature SCR denitration device 1 and then enters the heat exchange tube 9-3 through the air inlet chamber of the cooler 9, air is blown into the cooler shell from the lower part of the cooler shell 9-1 through the axial flow fan 10, indirect heat exchange is carried out between the flue gas and the air inside and outside the heat exchange tube 9-3, the temperature of the flue gas is controlled below the melting point of ammonium bisulfate through the air quantity of the axial flow fan 10 regulated through frequency conversion, the ammonium bisulfate in the flue gas is condensed in the heat exchange tube 9-3, and the cooled flue gas is discharged through the chimney 6 after passing through the draught fan 5. When the SCR catalyst operates at a low temperature, the bypass inlet valve 3 and the bypass outlet valve 4 are opened, the cooler inlet valve 7 and the cooler outlet valve 8 are closed, and flue gas passes through the low-temperature SCR denitration device 1, enters the induced draft fan 5 through a bypass and then is discharged through the chimney 6.
After the ammonium bisulfate is accumulated for a certain time, the heat exchange pipe 9-3 is washed by the high-pressure cleaning machine 14, the washed sewage is discharged into the sewage tank 12 through the sewage discharge pipe opening and the sewage discharge pipeline 11, and the sewage in the sewage tank 12 is discharged into a sewage treatment system of a sewage plant through the sewage discharge pump 13.
Claims (8)
1. The utility model provides a prevent device that low temperature SCR denitration catalyst regenerated particles matter exceeds standard which characterized in that: including main road flue (15) and bypass flue (2), set up cooler (9) on main road flue (15), cooler (9) both ends set up the valve respectively, the both ends of bypass flue (2) and the tie point of main road flue (15) set up respectively in main road flue (15) both ends valve outside, bypass flue (2) both ends set up the business turn over valve respectively, set up draught fan (5) on main road flue (15), draught fan (5) are located bypass flue (2) export outside, draught fan (5) intercommunication chimney (6), belt cleaning device and waste fitting discharging are connected respectively in cooler (9).
2. The device for preventing the regenerated particulate matter of the low-temperature SCR denitration catalyst from exceeding the standard according to claim 1, is characterized in that: the valves at the two ends of the cooler (9) are a cooler inlet valve (7) and a cooler outlet valve (8) respectively, and the valves at the two ends of the bypass flue (2) are a bypass inlet valve (3) and a bypass outlet valve (4) respectively.
3. The device for preventing the regenerated particulate matter of the low-temperature SCR denitration catalyst from exceeding the standard according to claim 1, is characterized in that: the cooler (9) is arranged to be of a shell-and-tube heat exchange structure and comprises a shell (9-1), tube plates (9-2) are arranged at two ends in the shell (9-1) respectively, heat exchange tubes (9-3) are transversely arranged between the two tube plates (9-2) in a penetrating mode, an axial flow fan (10) is arranged at the bottom of the shell (9-1), an evacuation port (9-5) is arranged at the top of the shell, and the axial flow fan (10) and the evacuation port (9-5) are communicated with a space between the two tube plates (9-2) of the shell (9-1).
4. The device for preventing the regenerated particulate matter of the low-temperature SCR denitration catalyst from exceeding the standard according to claim 3, is characterized in that: the cleaning device is a high-pressure cleaning machine (14), the high-pressure cleaning machine (14) is communicated with the heat exchange pipes (9-3) through pipelines, the bottom of the shell (9-1) is respectively provided with a sewage draining outlet (9-4), and the sewage draining outlets (9-4) are respectively positioned in a space formed by the outer side of the pipe plate (9-2) and the shell (9-1).
5. The device for preventing the regenerated particulate matter of the low-temperature SCR denitration catalyst from exceeding the standard according to claim 4, is characterized in that: the sewage discharging device comprises a sewage tank (12), the sewage tank (12) is connected with a sewage discharging pump (13), and the sewage discharging ports (9-4) are respectively communicated with the sewage tank (12) through sewage discharging pipelines (11).
6. The device for preventing the regenerated particulate matter of the low-temperature SCR denitration catalyst from exceeding the standard according to claim 3, is characterized in that: the axial flow fan (10) is a variable frequency axial flow fan.
7. The device for preventing the regenerated particulate matter of the low-temperature SCR denitration catalyst from exceeding the standard according to claim 3, is characterized in that: the heat exchange tubes (9-3) are arranged in a staggered manner.
8. The device for preventing the regenerated particulate matter of the low-temperature SCR denitration catalyst from exceeding the standard according to claim 3, is characterized in that: the cooler shell (9-1) is a rectangular shell, the left end and the right end of the cooler shell are connected with the main path flue (15) through square and round joints, the lower part of the cooler shell is connected with the axial flow fan (10) through the square and round joints, and the upper part of the cooler shell is communicated with the atmosphere through a rectangular pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220645377.2U CN217163880U (en) | 2022-03-23 | 2022-03-23 | Device for preventing regenerated particulate matter of low-temperature SCR denitration catalyst from exceeding standard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220645377.2U CN217163880U (en) | 2022-03-23 | 2022-03-23 | Device for preventing regenerated particulate matter of low-temperature SCR denitration catalyst from exceeding standard |
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| Publication Number | Publication Date |
|---|---|
| CN217163880U true CN217163880U (en) | 2022-08-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220645377.2U Active CN217163880U (en) | 2022-03-23 | 2022-03-23 | Device for preventing regenerated particulate matter of low-temperature SCR denitration catalyst from exceeding standard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217163880U (en) |
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2022
- 2022-03-23 CN CN202220645377.2U patent/CN217163880U/en active Active
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