CN213132656U - SCR denitration coal-fired power plant slag tap boiler waste gas processing system - Google Patents
SCR denitration coal-fired power plant slag tap boiler waste gas processing system Download PDFInfo
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- CN213132656U CN213132656U CN202021060801.4U CN202021060801U CN213132656U CN 213132656 U CN213132656 U CN 213132656U CN 202021060801 U CN202021060801 U CN 202021060801U CN 213132656 U CN213132656 U CN 213132656U
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Abstract
The utility model discloses a liquid sediment boiler waste gas processing system of SCR denitration coal-fired power plant, including boiler slag system, waste flue gas pollutant clean system, waste gas SCR deNOx systems and waste residue processing system, waste residue processing system includes slag bath and drags for the sediment machine, waste flue gas pollutant clean system includes waste gas pipe interface, exhaust gas pipeline, waste gas pipe regulating gate, exhaust gas temperature measurement station and waste gas flow measurement station, waste gas pipe interface and exhaust gas pipeline are connected, waste gas pipe regulating gate, exhaust gas temperature measurement station and waste gas flow measurement station all set up on exhaust gas pipeline's inner wall, waste gas SCR deNOx systems includes the dust remover. The utility model discloses newly-increased waste gas SCR deNOx systems and large-scale coal fired power plant unit's dust remover, draught fan, desulfurizing tower equipment produced waste flue gas pollutant in to slag bucket of slag tapping boiler extracts and the desorption and utilizes large-scale coal fired power plant unit's environmental protection check out test set to carry out real-time supervision.
Description
Technical Field
The utility model relates to a slag tap boiler exhaust-gas treatment technical field especially relates to a slag tap boiler exhaust-gas treatment system of SCR denitration coal fired power plant.
Background
The slag tapping boiler of the large coal-fired power plant melts the ash into a fluid state by utilizing higher hearth temperature, and the slag liquid falls into a slag pool through a slag flowing port at the bottom of the furnace, thereby achieving the purpose of reducing the volume and the weight of the ash. But because the slagging characteristic of slagging boiler in liquid state, when high temperature slag liquid got into the slag bath, high temperature slag liquid met water rapid cooling and produced a large amount of vapor, the air current fluctuates by a wide margin in the slag fill, it is extremely easy to form the malleation in the slag fill, hinder the slag liquid to flow downwards, it leads to the slag liquid jam to reduce the slag room temperature, waste gas and smoke and dust in the slag fill also can be along with the malleation dashes out the hole of seeing simultaneously, pollute the production scene, and also along with high temperature slag liquid gets into the slag fill partial high temperature flue gas in addition, this part high temperature flue gas contains a large amount of dust and sulfur dioxide atmospheric pollutants, these pollutants also can be along with the slag fill emits the malleation and dash. These conditions seriously affect the safe operation of the boiler, which becomes an urgent problem to be solved by the slag tapping boiler of a large coal-fired power plant.
The method is characterized in that a waste gas pipe interface is arranged in the middle of a slag hopper, waste gas and smoke generated in the slag hopper are conveyed to the front of a unit dust remover through a waste gas pipeline, and the waste gas is purified by a newly-added waste gas SCR device, the dust remover of the unit and environmental protection equipment of a desulfurizing tower and then discharged into the atmosphere through a chimney.
SUMMERY OF THE UTILITY MODEL
Based on the technical problem that the background art exists, the utility model provides a coal fired power plant of SCR denitration slag tap boiler waste gas handles system.
The utility model provides a liquid sediment boiler waste gas processing system of SCR denitration coal-fired power plant, including boiler slag system, waste flue gas pollutant clean system, waste gas SCR deNOx systems and waste residue processing system, waste residue processing system includes slag bath and dragveyer, waste flue gas pollutant clean system includes waste gas pipe interface, exhaust gas pipeline, waste gas pipe governing valve, exhaust gas temperature measurement station and waste gas flow measurement station, waste gas pipe interface and waste gas pipeline are connected, waste gas pipe governing valve, waste gas temperature measurement station and waste gas flow measurement station all set up on the inner wall of waste gas pipeline, waste gas SCR deNOx systems includes dust remover, draught fan, desulfurizing tower and chimney, the dust remover passes through the pipe connection on the draught fan, and the draught fan passes through the pipe connection on the desulfurizing tower, the desulfurizing tower passes through the pipe connection on the chimney, liquid sediment boiler is connected with high temperature flue gas pipeline, and the inner wall of the high-temperature flue gas pipeline is provided with a high-temperature flue gas regulating valve, the high-temperature flue gas pipeline is connected with a low-temperature flue gas pipeline, and the low-temperature flue gas regulating valve is arranged in the low-temperature flue gas pipeline.
Preferably, the boiler slag system comprises a slag tapping boiler and a burner, wherein the burner is fixedly connected to the outer wall of the top of the slag tapping boiler, the outer wall of the bottom of the slag tapping boiler is provided with a slag tapping hole, and the slag tapping hole is connected to the slag treatment system through a pipeline.
Preferably, the waste gas pipe interface is arranged on a pipeline connected with the slag flowing port and the waste slag treatment system.
The utility model provides a beneficial effect does:
1. the method and the system mainly utilize a newly-added waste gas SCR denitration system, a dust remover, an induced draft fan and desulfurization tower equipment of a large-scale coal-fired power plant unit to extract and remove waste flue gas pollutants generated in a slag hopper of a liquid-state slag removal boiler, and utilize environment-friendly detection equipment of the large-scale coal-fired power plant unit to carry out real-time monitoring. The method can perform environment-friendly treatment on the waste flue gas of the slag bucket of the slag tapping boiler, simultaneously maintain the negative pressure of the slag bucket, ensure that slag liquid of the slag tapping boiler smoothly flows into the slag bucket, prevent the slag bucket from being polluted by high-temperature flue gas flow in the slag bucket, and avoid the condition that the slag liquid is blocked due to the reduction of the temperature of the steam slag bucket caused by the generation of a large amount of water during the cooling of the slag liquid.
2. The method utilizes a newly-added odor waste gas SCR denitration system, an original dust remover, an induced draft fan and desulfurization tower equipment of a large-scale coal-fired power plant unit to extract and remove pollutants in waste flue gas generated by a slag hopper of a slag tapping boiler, and utilizes environment-friendly detection equipment of the large-scale coal-fired power plant unit to carry out real-time monitoring. The method can perform environment-friendly treatment on the waste gas and smoke dust of the slag bucket of the slag tap boiler, simultaneously maintain the negative pressure of the slag bucket, ensure that slag liquid of the slag tap boiler smoothly flows into the slag bucket, prevent the slag bucket from being polluted by high-temperature smoke gas flow in the slag bucket, and avoid the condition that the slag liquid is blocked due to the reduction of the temperature of the steam slag bucket caused by the generation of a large amount of water during the cooling of the slag liquid.
3. The method solves the problem of treating the waste gas and the smoke dust of the slag bucket of the slag tapping boiler of the large coal-fired power plant, prevents the safety accident caused by the positive pressure of the slag bucket and ensures the safe and stable operation of the unit.
Drawings
FIG. 1 is a schematic structural view of a waste gas disposal system of a liquid slag discharge boiler of an SCR denitration coal-fired power plant according to the present invention;
FIG. 2 is the utility model provides a structural schematic diagram of liquid sediment boiler waste gas processing system of SCR denitration coal fired power plant.
In the figure: the device comprises a liquid slag discharging boiler 1, a burner 2, a slag flowing port 3, a waste gas pipe interface 4, a waste gas pipeline 5, a waste gas pipe adjusting door 6, a waste gas temperature measuring point 7, a waste gas flow measuring point 8, a waste gas pipe bypass damper 9, a waste gas pipe bypass flue 10, a waste gas pipe flue damper 11, a waste gas mixing screen 12, a waste gas SCR inlet temperature measuring point 13, a high-temperature flue gas pipeline 14, a high-temperature flue gas adjusting door 15, a low-temperature flue gas pipeline 16, a low-temperature flue gas adjusting door 17, a mixed flue gas temperature measuring device 18, a mixed flue gas flow measuring point 19, a waste gas SCR20, a dust remover 21, an induced draft fan 22, a desulfurizing tower 23, a chimney 24, a slag bath.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Referring to fig. 1-2, a liquid slag-off boiler waste gas treatment system of an SCR denitration coal-fired power plant comprises a boiler slag system, a waste flue gas pollutant purification system, a waste gas SCR denitration system and a waste slag treatment system, wherein the waste slag treatment system comprises a slag bath 25 and a slag conveyor 26, the waste flue gas pollutant purification system comprises a waste gas pipe interface 4, a waste gas pipe 5, a waste gas pipe regulating gate 6, a waste gas temperature measuring point 7 and a waste gas flow measuring point 8, the waste gas pipe interface 4 is connected with the waste gas pipe 5, the waste gas pipe regulating gate 6, the waste gas temperature measuring point 7 and the waste gas flow measuring point 8 are all arranged on the inner wall of the waste gas pipe 5, the waste gas SCR denitration system comprises a dust remover 21, an induced draft fan 22, a desulfurizing tower 23 and a chimney 24, the dust remover 21 is connected with the induced draft fan 22 through a pipeline, the induced draft fan 22, the slag tapping boiler 1 is connected with a high-temperature flue gas pipeline 14, the inner wall of the high-temperature flue gas pipeline 14 is provided with a high-temperature flue gas adjusting door 15, the high-temperature flue gas pipeline 14 is connected with a low-temperature flue gas pipeline 16, and the low-temperature flue gas pipeline 16 is internally provided with a low-temperature flue gas adjusting door 17.
A method for treating waste gas of a liquid-state slag-off boiler of an SCR denitration coal-fired power plant comprises the following steps:
s1: the method has the advantages that the denitration treatment is carried out on the waste gas of the slag bucket of the slag chamber of the slag tap boiler 1 of the large coal-fired power plant by using the waste gas SCR20 denitration system, the desulfuration and dust removal treatment is carried out on the waste gas and dust pollutants after the denitration treatment by using the original dust remover 21, the draught fan 22 and the desulfurizing tower 23 of the large coal-fired power plant unit, and the concentration of the final discharged smoke pollutants is monitored in real time by using the environment-friendly detection equipment of the large coal-fired power plant unit;
s2: denitration treatment is carried out on slag hopper waste gas of a slag tap boiler 1 of a large coal-fired power plant by using a waste gas SCR20 denitration system, wherein the waste gas SCR20 denitration system comprises a waste gas pipe bypass damper 9, a waste gas pipe bypass flue 10, a waste gas pipe flue damper 11, a flue gas mixing screen 12, a waste gas SCR20 inlet temperature measuring point 13, a high-temperature flue gas pipeline 14, a high-temperature flue gas adjusting door 15, a low-temperature flue gas pipeline 16, a low-temperature flue gas adjusting door 17, a mixed flue gas temperature measuring point 18, a mixed flue gas flow measuring point 19 and a waste gas SCR20, high-temperature flue gas is extracted by using the high-temperature flue gas pipeline 14 and the high-temperature flue gas adjusting door 15, low-temperature flue gas is extracted by using the low-temperature flue gas pipeline 16 and the low-temperature flue gas adjusting door 17, and data of the waste gas flow measuring point 8, the waste gas temperature measuring point, The flow of the low-temperature flue gas is controlled, so that the flue gas finally entering the exhaust gas SCR20 is regulated to 280-400 ℃, the working temperature of the exhaust gas SCR20 is met, and the waste flue gas enters the dust remover 21 and the desulfurizing tower 23 for further purification treatment after being subjected to denitration treatment in the exhaust gas SCR 20;
s3: the device is provided with a high-temperature flue gas mixing device and a low-temperature flue gas mixing device, the flow rates of the high-temperature flue gas and the low-temperature flue gas are respectively calculated according to the data of each temperature and flow rate measuring point, the reasonable flow rate values of the high-temperature flue gas and the low-temperature flue gas are obtained and are adjusted through an adjusting baffle, and the adjusted temperature flow rates are monitored and fed back through a mixed flue gas temperature measuring point 18, a mixed flue gas flow rate measuring point 19 and a waste gas SCR20 inlet temperature measuring point 13;
s4: the waste gas pipeline 5, the slag hopper and the dust remover 21 are utilized, and the pressure difference between the slag hopper and the dust remover 21 is utilized to enable the slag hopper to form negative pressure, so that waste gas and smoke dust in the slag hopper are extracted to the front of the dust remover 21.
In the utility model, in S2, the heat insulation refractory castable material is laid in the used waste gas pipeline 5, the protection effect on the waste gas pipeline 5 is also played while the heat preservation effect is played, the waste gas pipeline 5 is prevented from being damaged and deformed due to overhigh temperature, in S2, a temperature measuring point is arranged at the interface of the waste gas pipeline 5, the waste gas temperature is monitored in a trial test, the boiler combustion is timely adjusted when the waste gas temperature is reduced, the slag blocking condition caused by overhigh temperature in the slag hopper is prevented, the waste gas flow of the waste gas pipeline 5 is adjusted by using an adjusting door of the waste gas pipeline 5, the condition that flame enters the slag hopper to burn and damage the slag hopper due to overhigh negative pressure of the slag hopper is prevented, the waste gas pipeline 5 can suck partial high-temperature flue gas in a hearth into the slag hopper along with slag liquid while maintaining the negative pressure of the slag hopper, the temperature of the slag hopper is maintained; boiler slag system includes slag tapping boiler 1 and combustor 2, and combustor 2 fixed connection is on the top outer wall of slag tapping boiler 1, and slag flowing port 3 has been seted up to slag tapping boiler 1 bottom outer wall, and slag flowing port 3 passes through the pipe connection on the waste residue processing system, and waste gas pipe interface 4 sets up on the pipeline that slag flowing port 3 and waste residue processing system are connected.
The above description is only the specific implementation manner of the preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, and according to the technical solution of the present invention and the novel concept thereof, the same replacement or change should be included in the protection scope of the present invention.
Claims (3)
1. A liquid slag-off boiler waste gas treatment system of an SCR denitration coal-fired power plant is characterized by comprising a boiler slag system, a waste flue gas pollutant purification system, a waste gas SCR denitration system and a waste slag treatment system, wherein the waste slag treatment system comprises a slag pool (25) and a slag dragger (26), the waste flue gas pollutant purification system comprises a waste gas pipe joint (4), a waste gas pipeline (5), a waste gas pipe regulating door (6), a waste gas temperature measuring point (7) and a waste gas flow measuring point (8), the waste gas pipe joint (4) is connected with the waste gas pipeline (5), the waste gas pipe regulating door (6), the waste gas temperature measuring point (7) and the waste gas flow measuring point (8) are all arranged on the inner wall of the waste gas pipeline (5), the waste gas SCR denitration system comprises a dust remover (21), an induced draft fan (22), a desulfurization tower (23) and a chimney (24), the dust remover (21) is connected to the induced draft fan (22), and draught fan (22) pass through the pipe connection on desulfurizing tower (23), desulfurizing tower (23) pass through the pipe connection at chimney (24), slag tapping boiler (1) is connected with high temperature flue gas pipeline (14), and the inner wall of high temperature flue gas pipeline (14) is provided with high temperature flue gas damper (15), high temperature flue gas pipeline (14) are connected with low temperature flue gas pipeline (16), and are provided with low temperature flue gas damper (17) in low temperature flue gas pipeline (16).
2. The SCR denitration coal-fired power plant slagging boiler waste gas treatment system according to claim 1, wherein the boiler slag system comprises a slagging boiler (1) and a burner (2), the burner (2) is fixedly connected to the outer wall of the top of the slagging boiler (1), the slagging boiler (1) is provided with a slagging port (3) on the outer wall of the bottom, and the slagging port (3) is connected to a waste residue treatment system through a pipeline.
3. The system for disposing the slagging tap boiler waste gas of the SCR denitration coal-fired power plant according to claim 1, wherein the waste gas pipe interface (4) is opened on a pipeline connecting the slag tap (3) and the waste slag treatment system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021060801.4U CN213132656U (en) | 2020-06-09 | 2020-06-09 | SCR denitration coal-fired power plant slag tap boiler waste gas processing system |
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| CN202021060801.4U CN213132656U (en) | 2020-06-09 | 2020-06-09 | SCR denitration coal-fired power plant slag tap boiler waste gas processing system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111603931A (en) * | 2020-06-09 | 2020-09-01 | 周昊 | SCR denitration coal-fired power plant liquid slag discharge boiler waste gas treatment system and method |
| CN114713592A (en) * | 2022-03-31 | 2022-07-08 | 天津华能杨柳青热电有限责任公司 | Device and method for preparing mineral wool by utilizing waste ash of waste incineration power plant |
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2020
- 2020-06-09 CN CN202021060801.4U patent/CN213132656U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111603931A (en) * | 2020-06-09 | 2020-09-01 | 周昊 | SCR denitration coal-fired power plant liquid slag discharge boiler waste gas treatment system and method |
| CN114713592A (en) * | 2022-03-31 | 2022-07-08 | 天津华能杨柳青热电有限责任公司 | Device and method for preparing mineral wool by utilizing waste ash of waste incineration power plant |
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