Efficient desulfurizing agent slurry supply device

Abstract

The utility model relates to an efficient desulfurizing agent slurry supply device which comprises a desulfurizing slurry box, a slurry supply pipeline, a blow-off pipeline and a circulating pipeline, the circulating pipeline is communicated with a desulfurizing tower, and the circulating pipeline is provided with a circulating pump; one end of the blow-off pipeline is connected with the circulating pipeline, the connecting point of the blow-off pipeline and the circulating pipeline is located between the circulating pump and the bottom end of the circulating pipeline, a blow-off manual valve is arranged at the other end of the blow-off pipeline, and a blow-off electric valve is arranged in the blow-off pipeline; one end of the slurry supply pipeline is connected with the bottom of the desulfurization slurry box, the other end of the slurry supply pipeline is connected with the blow-off pipeline, the connection point of the slurry supply pipeline and the blow-off pipeline is located between the blow-off electric valve and the blow-off manual valve, and the slurry supply pipeline is provided with a slurry supply pump. The device reduces the risk of pipeline blockage, improves the reliability of the system and the convenience of pipeline flushing, reduces the transformation cost of the efficient desulfurization technology of the power plant, and also facilitates the reduction of the operation control workload of workers.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas desulfurization, and more specifically, it relates to a high-efficiency desulfurizer slurry supply device. Background Art

[0002] At present, the only large-scale commercial desulfurization method in the industry is flue gas desulfurization (FGD), that is, desulfurization equipment is installed at the flue. There are many classification methods and naming methods for FGD. For example, according to the desulfurization principle, it can be divided into absorption method, adsorption method, oxidation-reduction method; according to the types of desulfurizing agents, it can be divided into calcium method, magnesium method, sodium method, ammonia method, seawater method, activated carbon adsorption method, etc. According to the dry-wet state of the absorbent and desulfurization products during the desulfurization process, it can be divided into wet method, semi-dry method and dry method. With the increasingly high environmental protection requirements, coupled with the aging of power plant equipment, especially the drastic fluctuations in coal prices in recent years, it has become a helpless move for power plants to choose relatively inexpensive high-sulfur coal types, resulting in the desulfurization efficiency of existing desulfurization technologies being unable to meet the emission reduction requirements, and the operation of desulfurization systems is facing more and more challenges. In particular, the blockage problem of the desulfurizer slurry supply pipeline is difficult to solve. As a supplement to improving the efficiency of limestone-gypsum wet desulfurization, the high-efficiency desulfurizer slurry supply system is mainly put into use when the desulfurization tower system is abnormal or the sulfur content of the coal is relatively high, and it is basically in a standby state at other times. Therefore, using a pipeline shut-off valve or regulating valve to isolate the high-efficiency desulfurizer slurry supply system, after a long period of shutdown, it is easy to have slurry accumulated in the pipeline connecting the shut-off valve and the inlet of the circulation pump, and then the pipeline is blocked and difficult to clean, and subsequent normal use is impossible. Therefore, it is necessary to improve the existing desulfurization device to solve the above problems. Summary of the Invention

[0003] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide a high-efficiency desulfurizer slurry supply device, which reduces the risk of pipeline blockage, improves the reliability of the system and the convenience of pipeline flushing, reduces the transformation cost of high-efficiency desulfurization technology in power plants, and is also beneficial to reducing the operation and control workload of staff.

[0004] The above technical purpose of the utility model is achieved through the following technical solutions:

[0005] A high-efficiency desulfurizer slurry supply device includes a desulfurization slurry tank, a slurry supply pipeline, a sewage discharge pipeline and a circulation pipeline. The circulation pipeline is arranged on one side of the desulfurization tower;

[0006] The top end of the circulation pipeline is connected to the spray layer at the top inside the desulfurization tower, the bottom end of the circulation pipeline is communicated with the bottom inside the desulfurization tower, and a circulation pump is arranged on the circulation pipeline;

[0007] One end of the sewage discharge pipe is connected to the circulation pipe. The connection point between the sewage discharge pipe and the circulation pipe is located between the circulation pump and the bottom end of the circulation pipe. The other end of the sewage discharge pipe is provided with a manual sewage discharge valve, and a motorized sewage discharge valve is arranged in the sewage discharge pipe.

[0008] One end of the slurry supply pipe is connected to the bottom of the desulfurization slurry tank. The other end of the slurry supply pipe is connected to the sewage discharge pipe, and the connection point between the slurry supply pipe and the sewage discharge pipe is located between the motorized sewage discharge valve and the manual sewage discharge valve. A slurry supply pump is arranged on the slurry supply pipe.

[0009] In one embodiment, the high-efficiency desulfurizer slurry supply device further includes a flushing pipe. The flushing pipe is connected to the sewage discharge pipe, and the connection point between the flushing pipe and the sewage discharge pipe is located between the slurry supply pump and the sewage discharge pipe. A motorized flushing water valve is arranged on the flushing pipe.

[0010] In one embodiment, the number of the circulation pipes is greater than or equal to two, and a circulation pump is arranged on each circulation pipe.

[0011] In one embodiment, the number of the sewage discharge pipes is the same as that of the circulation pipes. Each circulation pipe is respectively connected to a sewage discharge pipe, and the slurry supply pipe is respectively connected to a plurality of the sewage discharge pipes through a plurality of branch pipes.

[0012] In one embodiment, a quick coupling for compressed air is arranged on the side of the slurry supply pipe. The quick coupling for compressed air is located between the slurry supply pump and the flushing pipe, and a valve is arranged on the quick coupling for compressed air.

[0013] In one embodiment, a water pressure sensor is arranged in the slurry supply pipe. The water pressure sensor is arranged at the connection position between the flushing pipe and the slurry supply pipe.

[0014] In one embodiment, a humidity sensor is arranged at one end of the sewage discharge pipe far away from the circulation pipe. The humidity sensor is located outside the manual sewage discharge valve.

[0015] In summary, the utility model has the following beneficial effects:

[0016] The utility model connects the sewage discharge pipe with the slurry supply pipe, and uses the sewage discharge pipe as the sewage outlet of the high-efficiency desulfurizer slurry supply device, reducing the risk of pipeline blockage, improving the reliability of the system and the convenience of pipeline flushing, reducing the transformation cost of the high-efficiency desulfurization technology in the power plant, and also being beneficial to reducing the operation and control workload of the staff. Description of the Drawings

[0017] Figure 1 is a schematic diagram of the utility model;

[0018] Figure 2It is a schematic diagram of the quick-connect fitting for compressed air and the water pressure sensor provided by the present utility model.

[0019] In the figure: 1. Desulfurization slurry tank, 2. Slurry supply pipeline, 3. Slurry supply pump, 4. Circulation pipeline, 5. Circulation pump, 6. Drainage pipeline, 7. Drainage electric valve, 8. Drainage manual valve, 9. Flushing pipeline, 10. Flushing water electric valve, 11. Desulfurization tower, 12. Water pressure sensor, 13. Quick-connect fitting for compressed air. Specific embodiments

[0020] The present utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0021] It should be noted that the orientation terms such as "upper" and "lower" involved in this article are determined relative to the perspective of the accompanying drawings, and are only for the convenience of description and cannot be construed as a limitation to the technical solution.

[0022] As Figure 1 shown. The present utility model provides an efficient desulfurization agent supply device, which includes a desulfurization slurry tank 1, a slurry supply pipeline 2, a drainage pipeline 6 and a circulation pipeline 4, and the circulation pipeline 4 is arranged on one side of the desulfurization tower 11.

[0023] The top end of the circulation pipeline 4 is connected to the spray layer at the inner top of the desulfurization tower 11, the bottom end of the circulation pipeline 4 is communicated with the inner bottom of the desulfurization tower 11, and a circulation pump 5 is arranged on the circulation pipeline 4. The function of the circulation pipeline 4 is to send the slurry at the bottom of the desulfurization tower 11 to the top of the desulfurization tower 11, so as to realize flue gas desulfurization.

[0024] One end of the drainage pipeline 6 is connected to the circulation pipeline 4, and the connection point of the drainage pipeline 6 and the circulation pipeline 4 is between the circulation pump 5 and the bottom end of the circulation pipeline 4. The other end of the drainage pipeline 6 is provided with a drainage manual valve 8, and a drainage electric valve 7 is arranged in the drainage pipeline 6. It is easy to understand that when both the drainage electric valve 7 and the drainage manual valve 8 are opened, the drainage effect is achieved.

[0025] One end of the slurry supply pipeline 2 is connected to the bottom of the desulfurization slurry tank 1, the other end of the slurry supply pipeline 2 is connected to the drainage pipeline 6, and the connection point of the slurry supply pipeline 2 and the drainage pipeline 6 is between the drainage electric valve 7 and the drainage manual valve 8, and a slurry supply pump 3 is arranged on the slurry supply pipeline 2.

[0026] The working mode of the present utility model is specifically as follows:

[0027] When it is necessary to put into use the efficient desulfurization agent supply device, open the drainage electric valve 7, close the drainage manual valve 8, the slurry supply pipeline 2 is communicated with the circulation pipeline 4, start the slurry supply pump 3, input the efficient desulfurization agent in the desulfurization slurry tank 1 into the circulation pipeline 4, and then the efficient desulfurization agent enters the desulfurization tower 11 through the circulation pump 5 for recycling.

[0028] When it is necessary to stop the high - efficiency desulfurizer slurry supply device, close the sewage discharge electric valve 7, open the sewage discharge manual valve 8, disconnect the slurry supply pipe 2 from the circulation pipe 4. The part of the sewage discharge pipe 6 outside the sewage discharge electric valve 7 is connected to the slurry supply pipe 2, and the sewage discharge pipe 6 functions to discharge the residual slurry, emptying the residual slurry in the slurry supply pipe 2.

[0029] Preferably, the high - efficiency desulfurizer slurry supply device further includes a flushing pipe 9. The flushing pipe 9 is connected to the sewage discharge pipe 6, and the connection point of the flushing pipe 9 and the sewage discharge pipe 6 is between the slurry supply pump 3 and the sewage discharge pipe 6. The flushing pipe 9 is provided with a flushing water electric valve 10.

[0030] The flushing pipe 9 has two usage modes, including flushing the slurry supply pipe 2 and flushing the desulfurization tower 11. Specifically, when only the slurry supply pipe 2 needs to be flushed, open the flushing water electric valve 10 and the sewage discharge manual valve 8, close the sewage discharge electric valve 7, and the flushing water flushes the slurry supply pipe 2 between the slurry supply pump 3 and the sewage discharge pipe 6 to avoid pipe blockage caused by liquid accumulation. When the flushing water can enter the desulfurization tower 11, simultaneously open the flushing water electric valve 10, the sewage discharge electric valve 7, and close the sewage discharge manual valve 8. After the flushing water flushes the slurry supply pipe 2, it enters the desulfurization tower 11.

[0031] Preferably, the number of the circulation pipes 4 is greater than or equal to two, and a circulation pump 5 is provided on each circulation pipe 4.

[0032] Preferably, the number of the sewage discharge pipes 6 is the same as the number of the circulation pipes 4. Each circulation pipe 4 is respectively connected to a sewage discharge pipe 6, and the slurry supply pipe 2 is connected to multiple sewage discharge pipes 6 through multiple branch pipes.

[0033] Preferably, as Figure 2 shown, a compressed air quick - connector 13 is provided on the side of the slurry supply pipe 2. As Figure 2 shown, the compressed air quick - connector 13 is between the slurry supply pump 3 and the flushing pipe 9, and the compressed air quick - connector 13 is provided with a valve. The compressed air quick - connector 13 is connected to the pipe of an external compressed air device, and whether to introduce compressed air can be selected according to the actual situation. Generally, when emptying the residual slurry in the slurry supply pipe 2, compressed air can be introduced to blow out the residual slurry in the slurry supply pipe 2 and the liquid droplets attached to the pipe wall; similarly, after flushing the slurry supply pipe 2, compressed air can also be introduced to blow out all the flushing water to avoid liquid accumulation in the slurry supply pipe 2.

[0034] Generally speaking, the flushing water is reclaimed water. If it stays in the pulp supply pipe 2 for a long time, it may cause more scale to form on the inner wall of the pulp supply pipe 2. The quick coupling 13 for compressed air is connected to the pipe of an external compressed air device. When compressed air is introduced into the pulp supply pipe 2, the sewage discharge electric valve 7 is kept closed and the sewage discharge manual valve 8 is opened. The compressed air takes out all the water vapor in the pulp supply pipe 2, and then the pulp supply pipe 2 is in a standby state.

[0035] Preferably, as Figure 2 shown, a water pressure sensor 12 is arranged in the pulp supply pipe 2, and the water pressure sensor 12 is arranged at the connection between the flushing pipe 9 and the pulp supply pipe 2. When flushing the pulp supply pipe 2, it is assumed that the original water pressure of the flushing water is stable. If there is no blockage in the pulp supply pipe 2, the water pressure detected by the water pressure sensor 12 should be relatively stable. If there is a blockage in the pulp supply pipe 2 but it is not completely blocked, the water pressure between the position where the flushing water enters the pulp supply pipe 2 and the blockage point will increase. Whether there is a blockage in the pulp supply pipe 2 can be known through the water pressure sensor 12.

[0036] Preferably, a humidity sensor is arranged at one end of the sewage discharge pipe 6 far away from the circulation pipe 4 (not shown in the attached drawing), and the humidity sensor is outside the sewage discharge manual valve 8. The function of the humidity sensor is to detect the humidity of the blown air when compressed air is introduced to confirm that the pulp supply pipe 2 is dried. For example, after flushing the pulp supply pipe 2 and just introducing compressed air, the humidity of the gas blown out from the sewage discharge manual valve 8 is relatively high and exceeds the humidity value set by the humidity sensor, indicating that the pulp supply pipe 2 is still not dry at this time; when the humidity sensor detects that the humidity of the blown gas is close to the humidity of the compressed air and remains stable, it indicates that the pulp supply pipe 2 has been dried. Finally, each valve is reset, the external compressed air device is separated from the pulp supply pipe 2, and the pulp supply pipe 2 is in a standby state.

[0037] The automatic control steps of the present utility model are as follows:

[0038] Set the control interlock protection stop condition of the pulp supply pump 3 as: all the circulation pumps 5 corresponding to the pulp supply pipe 2 stop.

[0039] Set the control interlock permission start condition of the pulp supply pump 3 as: any one of the circulation pumps 5 corresponding to the pulp supply pipe 2 is running.

[0040] Set the automatic start mode of the pulp supply pump 3 as: put it into automatic, the pulp supply pump 3 starts automatically, and after a delay of 5 s, the sewage discharge electric valve 7 opens automatically.

[0041] Set the automatic stop mode of the pulp supply pump 3 as: put it into automatic, the pulp supply pump 3 stops automatically, after a delay of 5 s, the flushing water electric valve 10 opens automatically, after a delay of 30 s, the flushing water electric valve 10 closes automatically, and the sewage discharge electric valve closes automatically.

[0042] The above are only the preferred embodiments of the present utility model, and the protection scope of the present utility model is not limited to the above embodiments. All technical solutions falling within the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and refinements should also be regarded as the protection scope of the present utility model.

Claims

1. A high-efficiency desulfurization agent slurry supply device, characterized in that: It comprises a desulfurization slurry tank (1), a slurry supply pipeline (2), a sewage discharge pipeline (6) and a circulation pipeline (4), wherein the circulation pipeline (4) is arranged on one side of a desulfurization tower (11); The top end of the circulation pipeline (4) is connected to the spray layer at the top of the desulfurization tower (11), the bottom end of the circulation pipeline (4) is connected to the bottom of the desulfurization tower (11), and the circulation pipeline (4) is provided with a circulation pump (5); One end of the sewage discharge pipe (6) is connected to the circulation pipe (4), and the connection point between the sewage discharge pipe (6) and the circulation pipe (4) is between the circulation pump (5) and the bottom end of the circulation pipe (4). A sewage discharge manual valve (8) is provided at the other end of the sewage discharge pipe (6), and a sewage discharge electric valve (7) is provided in the sewage discharge pipe (6); One end of the slurry supply pipeline (2) is connected to the bottom of the desulfurization slurry tank (1), and the other end of the slurry supply pipeline (2) is connected to a sewage discharge pipeline (6), and the connection point between the slurry supply pipeline (2) and the sewage discharge pipeline (6) is between a sewage discharge electric valve (7) and a sewage discharge manual valve (8), and the slurry supply pipeline (2) is provided with a slurry supply pump (3).

2. The high-efficiency desulfurization agent slurry supply device according to claim 1, characterized in that: It also comprises a flushing pipe (9), the flushing pipe (9) being connected to the sewage pipe (6), and the connection point between the flushing pipe (9) and the sewage pipe (6) is located between the slurry supply pump (3) and the sewage pipe (6), and the flushing pipe (9) is provided with a flushing water electric valve (10).

3. The high-efficiency desulfurization agent slurry supply device according to claim 1, characterized in that: The number of the circulation pipelines (4) is greater than or equal to two, and a circulation pump (5) is provided on each circulation pipeline (4).

4. The high-efficiency desulfurization agent slurry supply device according to claim 3, characterized in that: The number of the sewage pipes (6) is the same as the number of the circulation pipes (4); each circulation pipe (4) is respectively connected to a sewage pipe (6); and the slurry supply pipe (2) is respectively connected to a plurality of sewage pipes (6) via a plurality of branch pipes.

5. The high-efficiency desulfurization agent slurry supply device according to claim 2, characterized in that: The stop condition of the control interlock protection of the slurry supply pump (3) is set as follows: all the circulation pumps (5) corresponding to the slurry supply pipeline (2) are stopped; The control interlocking permission start condition of the slurry supply pump (3) is set as follows: the slurry supply pipeline (2) corresponds to any one of the circulation pumps (5) running; The automatic start mode of the slurry supply pump (3) is set as follows: put into automatic mode, the slurry supply pump (3) automatically starts, and after a delay of 5 seconds, the sewage discharge electric valve (7) automatically opens.

6. The high-efficiency desulfurization agent slurry supply device according to claim 2, characterized in that: The slurry supply pump (3) is set to automatically stop in the following manner: put into automatic mode, the slurry supply pump (3) automatically stops, after a delay of 5 seconds, the flushing water electric valve (10) automatically opens, after a delay of 30 seconds, the flushing water electric valve (10) automatically closes, and the sewage electric valve automatically closes.

7. The high-efficiency desulfurization agent slurry supply device according to claim 2, characterized in that: A compressed air quick connector (13) is provided on the side of the slurry supply pipeline (2), the compressed air quick connector (13) is located between the slurry supply pump (3) and the flushing pipeline (9), and the compressed air quick connector (13) is provided with a valve.

8. The high-efficiency desulfurization agent slurry supply device according to claim 2, characterized in that: A water pressure sensor (12) is arranged in the slurry supply pipeline (2), and the water pressure sensor (12) is arranged at the connection between the flushing pipeline (9) and the slurry supply pipeline (2).

9. The high-efficiency desulfurization agent slurry supply device according to claim 7, characterized in that: A humidity sensor is provided at one end of the sewage discharge pipe (6) away from the circulation pipe (4), and the humidity sensor is located outside the sewage discharge manual valve (8).

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