Environment-friendly flue gas emission device for electric power system

Abstract

The invention relates to the technical field of flue gas treatment in thermal power generation, and discloses an environment-friendly flue gas emission device for an electric power system, which comprises a filtering tower, a supporting disc is arranged in the filtering tower, a plurality of flow guide covers parallel to the axis of the supporting disc are arranged on the supporting disc, the interior of each flow guide cover is of a hollow structure, and the bottom end of each flow guide cover is open; the bottom of the flow guide cover extends to the bottom of the supporting disc, and smoke guide holes are formed in the part, located above the supporting disc, of the flow guide cover in the circumferential direction of the flow guide cover; a dirt collecting hole is formed in the supporting disc outside the flow guide cover, the dirt collecting hole is communicated with a flow collecting cavity formed in the supporting disc, and a discharge hole is formed in one side of the flow collecting cavity; according to the flue gas purification device, rising flue gas in the filter tower can be guided, so that the flue gas is in full contact with filtrate, the flue gas purification effect is improved, meanwhile, impact hindrance caused by reacted liquid to rising of the flue gas is reduced, and normal flue gas treatment work is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas treatment in thermal power generation, and particularly to a flue gas environmental protection emission device for a power system. Background Art

[0002] During the power generation process in thermal power plants, a large amount of flue gas is emitted, which contains a large number of pollutants, such as nitrogen oxides, sulfur dioxide, soot, etc. Among them, nitrogen oxides and sulfur dioxide in the flue gas are the main pollution sources. The emission of these pollutants will have an adverse impact on the surrounding environment and human health. Therefore, the flue gas needs to be treated before being discharged. In the existing operation, spray heads are usually arranged in the filter tower body, and the flue gas is purified by spraying and contacting with a liquid for removing harmful substances; after the flue gas enters from the bottom of the filter tower, due to the lack of a corresponding flow guiding structure, the flue gas will rise in groups, resulting in incomplete reaction; based on this, many enterprises in the existing technology will add some flow guiding plates in the filter tower to solve the above problems.

[0003] Although the flow guiding plate can solve the above problems to a certain extent, the spray liquid after reacting with the flue gas will fall straight down along the holes on the flow guiding plate. Since the relevant components in the spray liquid have been consumed by the reaction at this time, it is difficult for the spray liquid to produce beneficial effects when contacting the flue gas below, and it will also have a greater impact on the flue gas rising below the mesh plate, affecting the treatment efficiency of the flue gas. Therefore, there is an urgent need for a flue gas environmental protection emission device for a power system to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a flue gas environmental protection emission device for a power system, which can guide the flue gas rising in the filter tower, make the flue gas fully contact with the filtering liquid, improve the purification effect of the flue gas, and at the same time reduce the impact and obstruction of the liquid after the reaction on the rising of the flue gas, ensuring the normal progress of the flue gas treatment work.

[0005] The present invention adopts the following technical solutions:

[0006] A flue gas environmental protection emission device for a power system, comprising a filtration tower. A spray head communicated with spray liquid is arranged at the top end inside the filtration tower. A sewage discharge port is arranged at the bottom end of the filtration tower. A smoke transmission pipeline is communicated and arranged on the filtration tower on one side above the sewage discharge port. A support plate is arranged inside the filtration tower between the spray head and the smoke transmission pipeline. A plurality of flow guiding covers parallel to its axis are arranged on the support plate. The inside of the flow guiding cover is a hollow structure and its bottom end is an open setting. The bottom of the flow guiding cover extends to the bottom of the support plate. Smoke guiding holes are arranged along the circumferential direction of the part of the flow guiding cover above the support plate. Collection holes for dirt are arranged on the support plate outside the flow guiding cover. The collection holes are communicated with a collection cavity arranged inside the support plate. A discharge hole is arranged on one side of the collection cavity.

[0007] Preferably, a smoke guiding net is arranged in each of the smoke guiding holes.

[0008] Preferably, the discharge hole is connected with a liquid delivery pump through a pipeline. The outlet end of the liquid delivery pump is communicated with a liquid delivery ring arranged at the bottom of the support plate. Liquid delivery channels are arranged along the axial direction on the side walls of each flow guiding cover. A shunt pipe communicated with the liquid delivery channels is arranged on the liquid delivery ring. Delivery holes are arranged on one side of the upper part of the liquid delivery channels inside the flow guiding cover. An impeller is rotatably arranged on one side inside the flow guiding cover at the delivery hole. The impeller is connected with a cleaning brush plate rotatably arranged outside the flow guiding cover through a rotating shaft. In the initial state, the bristles on the cleaning brush plate are in contact with the smoke guiding net.

[0009] Preferably, a flow guiding cap is rotatably arranged at the top of the flow guiding cover. The flow guiding cap is connected with the rotating shaft. The cleaning brush plate is connected with the flow guiding cap.

[0010] Preferably, the flow guiding cap is a conical structure with a tip, and the area of its bottom is not less than the area of the top of the flow guiding cover.

[0011] Preferably, a number of rubber protrusions are arranged on one side of the liquid delivery channel outside the flow guiding cover.

[0012] Preferably, a flow guiding platform with an upward arch is arranged in the collection cavity.

[0013] Preferably, a filter is arranged between the liquid delivery pump and the discharge hole.

[0014] Preferably, the filter comprises an external box body. A discharge port is arranged at the bottom of the box body. A cylindrical filter screen cover is arranged on the discharge port.

[0015] Preferably, a slag discharge port is provided at the bottom of the box body on one side of the discharge port, a rotating rod driven by a motor is provided at the top of the box body, and a cleaning brush is provided on the rotating rod.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: by providing a flow guide cover on the support disk, the present invention can divert and disperse the rising flue gas in the filtration tower, enabling the flue gas to uniformly contact the spray liquid and improving the reaction effect; in addition, the setting of the dirt collection holes and the flow collection cavity on the support disk helps the spray liquid after reacting with the flue gas to enter the flow collection cavity through the dirt collection holes and be centrally discharged from the discharge holes on one side of the flow collection cavity, reducing the impact and obstruction on the rising flue gas and ensuring the rising rate of the flue gas. Description of the Drawings

[0017] Figure 1 is a schematic structural view of the filtration tower of the present invention;

[0018] Figure 2 is a schematic structural view of the support disk of the present invention;

[0019] Figure 3 is a sectional view of the support disk of the present invention;

[0020] Figure 4 is a bottom view of the support disk of the present invention;

[0021] Figure 5 is a schematic structural view of the flow guide cover of the present invention;

[0022] Figure 6 is a sectional view of the filter of the present invention. Detailed Embodiments

[0023] The following will clearly and completely describe the present invention in conjunction with the drawings and embodiments:

[0024] Such as Figures 1 to 6As shown in the figure, a flue gas environmental protection emission device for a power system according to the present invention includes a filtration tower 1. At the top end inside the filtration tower 1, there is a spray head that is in communication with the spray liquid. On one side of the filtration tower 1, there is a spray liquid delivery pipe 2, and the spray liquid delivery pipe 2 is connected to the spray head. At the bottom end of the filtration tower 1, there is a sewage outlet 3. On the filtration tower 1 above one side of the sewage outlet 3, there is a smoke transmission pipe 4 that is conductively arranged for delivering the flue gas to be treated into the filtration tower 1. Inside the filtration tower 1 between the spray head and the smoke transmission pipe 4, there is a support plate 5. The diameter of the support plate 5 matches the inner diameter of the filtration tower 1 so that the support plate 5 is tightly arranged inside the filtration tower 1 and divides the filtration tower 1 into upper and lower two spaces to reduce the obstruction caused by the downward flow of the spray liquid to the upward movement of the flue gas. On the support plate 5, there are a plurality of flow guiding covers 6 that are parallel to its axis. The inside of the flow guiding cover 6 is a hollow structure and its bottom end is an open setting. The bottom of the flow guiding cover 6 extends to the bottom of the support plate 5 for the flue gas to enter the flow guiding cover 6. The part of the flow guiding cover 6 above the support plate 5 is provided with smoke guiding holes along its circumferential direction. There is a certain distance reserved between the bottom of the smoke guiding holes and the support plate 5 to reserve a certain waste liquid flow space to avoid the situation of waste liquid flowing back along the smoke guiding holes. On the support plate 5 outside the flow guiding cover 6, there are dirt collecting holes 7. The dirt collecting holes 7 are in communication with a collecting cavity 8 arranged inside the support plate 5. The collecting cavity 8 is used for temporarily storing the waste liquid after the reaction. On one side of the collecting cavity 8, there is a discharge hole for centrally discharging the collected waste liquid to one side to reduce the impact on the upward flue gas.

[0025] Further, in this embodiment, a smoke guiding net 9 is arranged in each smoke guiding hole. The setting of the smoke guiding net 9 can not only further disperse and guide the flue gas to achieve the uniformity when the flue gas rises, ensure the reaction effect with the spray liquid, but also filter and intercept the solid particles entrained in the flue gas, thereby ensuring the up-to-standard emission of the flue gas. In addition, in the collecting cavity 8, there is an upward-arching guiding platform 26. The installation hole for installing the flow guiding cover 6 penetrates through the guiding platform 26. The setting of the guiding platform 26 helps the waste liquid entering the collecting cavity 8 to flow to the bottom of the collecting cavity 8 and be quickly discharged from the discharge hole.

[0026] Further, in this embodiment, the discharge hole is connected to a liquid delivery pump 10 through a pipeline. The liquid delivery pump 10 is located outside the filtration tower 1, and the outlet end of the liquid delivery pump 10 is communicated with a liquid delivery ring 11 arranged at the bottom of the support plate 5. A liquid delivery channel 12 is axially arranged on the side wall of each flow guide cover 6. The outer wall of the liquid delivery channel 12 is flush with the outer wall of the smoke guide net 9. A shunt pipe communicated with the liquid delivery channel 12 is arranged on the liquid delivery ring 11. A delivery hole is opened on one side of the upper part of the liquid delivery channel 12 located inside the flow guide cover 6. An impeller 13 is rotatably arranged inside the flow guide cover 6 on one side of the delivery hole. A rotating shaft is arranged on the impeller 13. After the rotating shaft passes through the top of the flow guide cover 6 movably, it is connected to a cleaning brush plate 14 rotatably arranged outside the flow guide cover 6. In the initial state, the bristles on the cleaning brush plate 14 are in contact with the smoke guide net 9. When the smoke guide net 9 needs to be cleaned, starting the liquid delivery pump 10 will deliver the liquid stored in the flow collecting cavity 8 into the liquid delivery ring 11, then to the liquid delivery channel 12, and is discharged under pressure through the delivery hole on the liquid delivery channel 12, acting tangentially on the impeller 13 to drive the impeller 13 to rotate, thereby realizing the rotation of the cleaning brush plate 14 outside the flow guide cover 6, cleaning the particles that are stuck on the smoke guide net 9 and difficult to remove, and improving the smoke transmittance. As the impeller 13 rotates, the liquid will also be scattered and act on the inner wall of the flow guide cover 6, playing a role in cleaning the inner wall of the flow guide cover 6.

[0027] Further, a flow guide cap 15 is rotatably arranged at the top of the flow guide cover 6 through a bearing. The flow guide cap 15 is connected to the rotating shaft, and the cleaning brush plate 14 is connected to the flow guide cap 15. Among them, the flow guide cap 15 has a conical structure with a tip, and the area of its bottom is not less than the area of the top of the flow guide cover 6. The tip of the flow guide cap 15 can provide a diversion for the spraying liquid, avoiding the accumulation of the spraying liquid at the top end of the flow guide cover 6. In addition, in this embodiment, a number of rubber protrusions 16 are arranged on the side of the liquid delivery channel 12 located outside the flow guide cover 6. The rubber protrusions 16 are preferably arranged in a hemispherical structure. The arrangement of the rubber protrusions 16 can contact the bristles on the cleaning brush plate 14 when the cleaning brush plate 14 rotates, causing the bristles to be disturbed, so as to clean the particles attached to the bristles and achieve the purpose of cleaning the bristles.

[0028] In addition, in this embodiment, a filter is provided between the liquid delivery pump 10 and the discharge hole to filter the waste liquid, reduce the content of particulate matter in the waste liquid, and avoid the phenomenon of the waste liquid contaminating the inside of the deflector 6. Specifically, the filter includes an outer box body 17. The box body 17 is preferably arranged in a cylindrical structure. One side of the top of the box body 17 is communicated with the discharge hole through a pipeline. A discharge port 18 is arranged at the bottom of the box body 17. The discharge port 18 is connected to the inlet end of the liquid delivery pump 10 through a pipeline. A cylindrical filter mesh cover 19 is arranged on the discharge port 18. The filter mesh cover 19 extends vertically in the box body 17 for a certain distance to increase the filtration area and reduce the frequency of cleaning the filter mesh cover 19. In addition, a slag discharge port 20 is arranged at the bottom of the box body 17 on one side of the discharge port 18. A sealing valve is arranged at the slag discharge port 20. A rotating rod 22 driven by a motor 21 is arranged at the top of the box body 17. A cleaning brush 23 is arranged on the rotating rod 22. The cleaning brush 23 is integrally in a structure similar to the letter 'Z' to clean the top and side walls of the mesh cover and at the same time clean the particulate matter falling on the bottom of the box body 17, push the particulate matter to the slag discharge port 20 for centralized discharge, and improve the convenience of slag removal. In this embodiment, a water replenishing port 24 is preferably further arranged on the side of the box body 17 away from the filtration tower 1. The water replenishing port 24 can connect to an external water source when the waste liquid is insufficient to clean the smoke guiding net 9 on the deflector 6. A solenoid valve is arranged at the water replenishing port 24. In addition, a shunt pipeline 25 is arranged on the pipeline connected to the discharge hole, and a solenoid valve is arranged on the shunt pipeline 25. When it is not necessary to clean the deflector 6, the solenoid valve is opened to discharge the waste liquid in the collecting chamber 8. The shunt pipeline 25 preferably extends below the smoke transmission pipeline 4 to further reduce the influence on the rising of the smoke.

[0029] When the present invention is in operation, the smoke is input into the filtration tower 1 through the smoke transmission pipeline 4 and flows upward. When the smoke flows to the position of the support disk 5, it is dispersed and scattered by the deflector 6 on the support disk 5 and evenly flows out through the smoke guiding net 9, and uniformly contacts with the spraying liquid sprayed by the spray heads for reaction. The reacted spraying liquid then drops onto the support disk 5 and enters the collecting chamber 8 through the sewage collecting holes 7 for temporary storage. When it is necessary to clean the smoke guiding net 9 after working for a period of time, the liquid delivery pump 10 can be started to filter the waste liquid stored in the collecting chamber 8 through the filter and then transport it to the impeller 13 in the deflector 6. The pressurized liquid is used to drive the impeller 13 to rotate, and then the rotation of the cleaning brush plate 14 outside the deflector 6 is completed to clean the smoke guiding net 9 and ensure the passing efficiency of the smoke.

[0030] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A flue gas environmental emission device for an electric power system, comprising a filter tower, a spray head connected to a spray liquid is arranged at the top of the filter tower, a sewage outlet is arranged at the bottom of the filter tower, and a smoke conveying pipe is arranged on the filter tower above the sewage outlet, characterized in that: A support plate is arranged inside the filter tower between the spray head and the smoke conveying pipe, and a plurality of flow guide covers parallel to the axis of the support plate are arranged on the support plate. The interior of the flow guide cover is a hollow structure and the bottom end is open. The bottom of the flow guide cover extends to the bottom of the support plate, and the part of the flow guide cover located above the support plate is provided with smoke guide holes along its circumferential direction; a sewage collecting hole is arranged on the support plate outside the flow guide cover, and the sewage collecting hole is communicated with a collecting chamber arranged in the support plate, and a discharge hole is opened on one side of the collecting chamber.

2. The environmentally friendly flue gas emission device for power system according to claim 1, characterized in that: A smoke guiding net is arranged in each of the smoke guiding holes.

3. The environmentally friendly flue gas emission device for power system according to claim 2 is characterized in that: The discharge hole is connected to a liquid delivery pump through a pipeline, and the outlet end of the liquid delivery pump is communicated with a liquid delivery ring arranged at the bottom of the support plate; a liquid delivery channel is arranged on the side wall of each of the guide covers along its axial direction, and a diversion pipe communicated with the liquid delivery channel is arranged on the liquid delivery ring, and a delivery hole is opened on one side of the upper part of the liquid delivery channel located in the guide cover, and an impeller is rotatably arranged in the guide cover on one side of the delivery hole, and the impeller is connected to a cleaning brush plate rotatably arranged on the outside of the guide cover through a rotating shaft; in an initial state, the bristles on the cleaning brush plate are in contact with the smoke guide net.

4. The environmentally friendly flue gas emission device for power system according to claim 3 is characterized in that: A flow guide cap is rotatably arranged on the top of the flow guide cover, the flow guide cap is connected to the rotating shaft, and the cleaning brush plate is connected to the flow guide cap.

5. The environmentally friendly flue gas emission device for power system according to claim 4 is characterized in that: The deflector cap is a conical structure with a pointed end, and the bottom area thereof is not less than the area of ​​the top of the deflector cover.

6. The environmentally friendly flue gas emission device for power system according to claim 5, characterized in that: A plurality of rubber protrusions are arranged on one side of the liquid delivery channel located outside the flow guide cover.

7. The environmentally friendly flue gas emission device for power system according to claim 1, characterized in that: An upwardly arched flow guide platform is arranged in the collecting cavity.

8. The environmentally friendly flue gas emission device for power system according to claim 3 is characterized by: A filter is arranged between the liquid delivery pump and the discharge hole.

9. The environmentally friendly flue gas emission device for power system according to claim 8, characterized in that: The filter comprises an external box body, a discharge port is arranged at the bottom of the box body, and a cylindrical filter screen cover is arranged on the discharge port.

10. The environmentally friendly flue gas emission device for power system according to claim 9, characterized in that: A slag discharge port is arranged at the bottom of the box body on one side of the discharge port, a rotating rod driven by a motor is arranged at the top of the box body, and a cleaning brush is arranged on the rotating rod.

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