Accident water collecting and treating device for thermal power plant

Abstract

The utility model discloses a thermal power plant accident water collecting and processing device which comprises a plant rainwater pipe, a plant rainwater header pipe, a rainwater inspection well, branch pipes, a settling zone and a clarifying zone, the plant rainwater branch pipes are distributed at preset positions of a plant, the plant rainwater pipe is connected with the plant rainwater header pipe, the plant rainwater header pipe is connected with the rainwater inspection well, and the settling zone is connected with the settling zone. The rainwater inspection well is connected with the settling zone through a branch pipe, the settling zone is connected with the clarifying zone through a grid, the top elevation of the branch pipe is lower than the bottom elevation of a factory rainwater header pipe, the clarifying zone is provided with a water pump, the water pump is connected with a water pipe, and the water pipe is communicated to a coal yard. The device can quickly and effectively intercept, collect and treat accident wastewater, fire-fighting wastewater and initial rainwater in an accident state of a thermal power plant, prevents the wastewater from being discharged to the environment to pollute a water body, realizes rainwater decontamination and diversion, recycles clarified liquid for dust falling of a coal yard and washing of a coal conveying trestle after the wastewater is collected, precipitated and clarified, saves the water supplementing amount of production water, and reduces the production cost. And enterprise cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment equipment, in particular to an accident water collection and treatment device for a thermal power plant. Background Art

[0002] During the operation of a thermal power plant, if an accident occurs, some accident wastewater and firefighting wastewater will be generated. Many thermal power plants do not have accident water pools for storing and treating these accident wastewater and firefighting wastewater. These accident wastewater, firefighting wastewater, and initial rainwater contain some harmful substances or complex components. Directly discharged into the municipal rainwater network through the plant rainwater pipe network will cause the plant rainwater pipe network to be blocked, pollute the water body, and fail to meet environmental protection requirements. Although some thermal power plants have accident water pools, the accident water pools are not set up reasonably and have high use costs. They cannot effectively treat wastewater, allowing unretained accident water to be discharged into the environment, polluting surface water and failing to play its due role. Utility Model Content

[0003] The utility model is to overcome the shortcomings of the above-mentioned prior art and provide a thermal power plant accident water collection and treatment device. The utility model can collect and treat accident wastewater, firefighting wastewater, and initial rainwater in the accident state of the thermal power plant, and prevent the wastewater from being directly discharged into the municipal rainwater pipe network, and will not discharge the accident water of the thermal power plant, thereby reducing the risk of polluting the water body. In addition, after the wastewater is collected, precipitated, and clarified by the accident water collection device, the clarified liquid is reused for dust reduction in the coal yard and flushing of the coal transport trestle, which not only saves the replenishment amount of production water, but also reduces the pollution of surface water.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A device for collecting and treating accident water in a thermal power plant comprises a plant area rainwater pipe, a plant area rainwater main pipe, a rainwater inspection well, a branch pipe, a sedimentation area and a clarification area. The plant area rainwater branch pipes are distributed at preset positions in the plant area. The plant area rainwater pipe is connected to the plant area rainwater main pipe, the plant area rainwater main pipe is connected to the rainwater inspection well, the rainwater inspection well is connected to the sedimentation area through a branch pipe, the sedimentation area is connected to the clarification area through a grille, the top elevation of the branch pipe is lower than the bottom elevation of the plant area rainwater main pipe, a water pump is provided in the clarification area, the water pump is connected to a water pipe, and the water pipe is connected to a coal yard.

[0006] The bottom surface of the pool bottom in the sedimentation zone is lower than the bottom surface of the pool bottom in the clarification zone.

[0007] The bottom surface of the pool in the clarification zone has a slope of 1%-3% and slopes toward the sedimentation zone.

[0008] A sealed isolation wall is arranged between the precipitation zone and the clarification zone, the isolation wall is provided with a through hole, and the grille is installed in the through hole.

[0009] The branch pipe is provided with a valve.

[0010] The valve is an electric valve, and the electric valve is electrically connected to a remote controller.

[0011] The clarification zone is provided with a ventilation pipe, through which the clarification zone is connected with the outside world.

[0012] A manhole is provided in the clarification area.

[0013] The beneficial effects of the utility model are:

[0014] 1. The accident water collection device of the thermal power plant of the utility model can utilize part of the existing rainwater pipe network in the plant area to quickly and effectively intercept the accident wastewater, firefighting wastewater, and initial rainwater in the accident state of the thermal power plant, collect and treat them, and prevent them from being discharged into the environment and polluting the water body, so as to realize the separation of clean and dirty rainwater, and the production and use and maintenance costs are low. It avoids the problem that the accident wastewater, firefighting wastewater, and initial rainwater in the accident area are directly discharged, which will clog the rainwater pipe network in the plant area and pollute the environment, and reduces the risk of polluting water bodies. In addition, after the wastewater is collected, precipitated, and clarified by the accident water collection device, the clarified liquid is reused for dust reduction in the coal yard and flushing of the coal transport trestle, which not only saves the amount of water replenishment for production water, but also reduces the pollution of surface water and saves enterprise costs.

[0015] 2. Since this device is located at the location of the factory rainwater main pipe, that is, the factory main water outlet pipe, the top elevation of the branch pipe leading from the rainwater inspection well to this device is lower than the bottom elevation of the factory rainwater pipe in the rainwater inspection well. This part of the accident water can enter this device first and will not be discharged outside, thus ensuring the treatment effect and avoiding pollution caused by discharge into the external pipeline network.

[0016] 3. Since the sedimentation area of ​​this device is lower than the clarification area, a grid is added between the sedimentation areas, and the sedimentation area is made with a slope of 1%-3% to ensure that the muddy water and large particles in the accident water can be precipitated in the sedimentation area, and the clarified liquid enters the clarification area.

[0017] 4. By adding an electric valve to the branch pipe, after collecting the accident water, the electric valve is remotely closed to achieve clean and dirty water separation. The remaining clean rainwater is discharged into the municipal rainwater pipe network, while the wastewater in the accident water collection device is precipitated and clarified in this device, and the clarified water is pumped to the coal yard for dust reduction. Or avoid the subsequent influx of other sewage to cause pollution to the treated clean water.

[0018] 5. Since the clarification area is equipped with a ventilation pipe, the clarification area is connected with the outside world through the ventilation pipe, ensuring that the gas in the clarification area can be discharged in time to ensure the safety of the clarification area.

[0019] 6. As there is a manhole in the clarification area, during maintenance work, the staff enters the interior of the device through the manhole. When there is too much sediment in the sedimentation area, it will be cleaned out to increase the cleaning effect and reduce the discharge of polluted water. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0021] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0022] Figure 2 for Figure 1 AA section view.

[0023] In the figure, 1 is the factory area rainwater main pipe, 2 is the rainwater inspection well, 3 is the branch pipe, 4 is the electric valve, 5 is the sedimentation area, 6 is the grille, 7 is the ventilation pipe, 8 is the clarification area, 9 is the water pump, and 10 is the manhole. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0025] Combination Figure 1 , Figure 2A device for collecting and treating accident water in a thermal power plant comprises a plant rainwater pipe, a plant rainwater main pipe 1, a rainwater inspection well 2, a branch pipe 3, a sedimentation area 5, and a clarification area 8. The plant rainwater branches are distributed at preset positions in the plant. Accident water, firefighting wastewater, and initial rainwater in the accident area of ​​the thermal power plant are collected through the plant rainwater branches distributed at preset positions in the plant. The plant rainwater pipe is connected to the plant rainwater main pipe 1. The plant rainwater main pipe 1 is connected to the rainwater inspection well 2. The rainwater inspection well 2 is connected to the sedimentation area 5 through the branch pipe 3. The sedimentation area 5 is connected to the clarification area 8 through the grille 6. The top elevation of the branch pipe 3 is lower than the bottom elevation of the plant rainwater main pipe 1. The clarification area 8 is provided with a water pump 9, which is connected to the water pipe, and the water pipe is connected to the coal yard. The accident water collection pipeline of the utility model can make full use of the existing plant rainwater pipe network, quickly realize the effective interception of accident water, and prevent it from being discharged into the environment and polluting the water body. Without adding a new pipeline system, the clean and dirty diversion of rainwater can be achieved. The structure is simple, the materials are easily available, and the manufacturing, use and maintenance costs are low. In addition, since the device is located at the location of the factory rainwater main pipe 1, that is, the factory main water outlet pipe, the top elevation of the branch pipe 3 connected to the device from the rainwater inspection well 2 is lower than the bottom elevation of the factory rainwater pipe in the rainwater inspection well 2. This part of the accident water can enter the device first and will not be discharged, ensuring the treatment effect and avoiding pollution caused by discharge to the external pipe network. In addition, the clean water in the clarification area 8 is transported to the coal yard by a water pump 9 for dust reduction in the coal yard, which reduces the amount of raw water replenishment and saves operating costs.

[0026] The bottom surface of the pool bottom in the sedimentation zone is lower than the bottom surface of the pool bottom in the clarification zone.

[0027] The bottom surface of the pool of the clarification zone 8 is provided with a slope of 1%-3%, sloping toward the sedimentation zone 5. In the utility model, the bottom surface of the pool of the clarification zone 8 preferably has a slope of 2%.

[0028] A sealed isolation wall is provided between the precipitation zone 5 and the clarification zone 8 . The isolation wall is provided with through holes, and the grid 6 is installed in the through holes.

[0029] Since the sedimentation zone 5 of the device is lower than the clarification zone 8, a grid is added between the sedimentation zones, and the sedimentation zone has a slope of 1%-3%, ensuring that muddy water and large particles in the accident water can be precipitated in the sedimentation zone, and the clarified liquid enters the clarification zone.

[0030] The branch pipe 3 is provided with a valve 4. The valve 4 is an electric valve, which is electrically connected to a remote controller. By adding an electric valve to the branch pipe, after collecting the accident water, the electric valve is remotely closed to achieve clean and dirty water diversion, thereby preventing other sewage from continuing to flow in and causing pollution to the treated clean water.

[0031] The clarification zone 8 is provided with a ventilation pipe 7. The clarification zone 8 is connected to the outside world through the ventilation pipe 7.

[0032] The clarification area 8 is provided with a manhole 10. During maintenance work, the staff enters the interior of the device through the manhole 10. When there is too much sediment in the sedimentation area 5, it is cleaned out, thereby increasing the cleaning effect and reducing the discharge of polluted water.

[0033] This part of wastewater first enters the accident water collection device and will not be discharged into the municipal rainwater pipe network. After this part of wastewater is collected, the electric valve 4 is remotely closed to prevent the pollution of clean rainwater. The remaining clean rainwater is discharged into the municipal rainwater pipe network, which will not cause environmental surface water pollution. The accident water entering this device first enters the sedimentation area 5 of this device. Large particles will settle to the bottom of the pool. The unprecipitated large particles will be intercepted by the grille 6 and will not enter the clarification area 8. The bottom surface of the pool of the clarification area 8 is made into a 2% slope, sloping towards the sedimentation area. Finally, the water in the clarification area 8 is clarified water, which can be transported to the coal yard through the water pump 9 for dust reduction in the coal yard. This device is connected to the outside world through the ventilation pipe 7. During maintenance, the inside of the device is entered through the manhole 10. When there is too much sediment in the sedimentation area 5, it is cleaned.

[0034] The volume of the utility model includes the sum of the capacity of accident wastewater, firefighting wastewater and initial rainwater in the accident area.

[0035] In the description of the present invention, the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the purpose of describing the present invention rather than requiring the present invention to be constructed or operated in a specific position, and therefore cannot be understood as a limitation on the present invention. The terms "connected" and "connected" in the present invention should be understood in a broad sense, for example, it can be a connection or a detachable connection; it can be a direct connection or an indirect connection through an intermediate component. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0036] The above is a preferred embodiment of the present invention, and the description of the specific embodiment is only used to better understand the concept of the present invention. For ordinary technicians in this technical field, several improvements or equivalent substitutions can be made according to the principle of the present invention, and these improvements or equivalent substitutions are also considered to fall within the protection scope of the present invention.

Claims

1. A device for collecting and treating accident water in a thermal power plant, characterized in that: It includes a factory rainwater pipe, a factory rainwater main pipe, a rainwater inspection well, a branch pipe, a sedimentation area, and a clarification area. The factory rainwater branch pipes are distributed at preset positions in the factory. The factory rainwater pipe is connected to the factory rainwater main pipe, the factory rainwater main pipe is connected to the rainwater inspection well, the rainwater inspection well is connected to the sedimentation area through a branch pipe, the sedimentation area is connected to the clarification area through a grille, the top elevation of the branch pipe is lower than the bottom elevation of the factory rainwater main pipe, the clarification area is equipped with a water pump, the water pump is connected to the water pipe, and the water pipe is connected to the coal yard.

2. The device for collecting and treating accident water in a thermal power plant according to claim 1, characterized in that: The bottom surface of the pool bottom in the sedimentation zone is lower than the bottom surface of the pool bottom in the clarification zone.

3. The device for collecting and treating accident water in a thermal power plant according to claim 2, characterized in that: The bottom surface of the pool in the clarification zone has a slope of 1%-3% and slopes toward the sedimentation zone.

4. The device for collecting and treating accident water in a thermal power plant according to claim 1, characterized in that: A sealed isolation wall is arranged between the precipitation zone and the clarification zone, the isolation wall is provided with a through hole, and the grille is installed in the through hole.

5. The device for collecting and treating accident water in a thermal power plant according to claim 1, characterized in that: The branch pipe is provided with a valve.

6. The device for collecting and treating accident water in a thermal power plant according to claim 5, characterized in that: The valve is an electric valve, and the electric valve is electrically connected to a remote controller.

7. The device for collecting and treating accident water in a thermal power plant according to claim 1, characterized in that: The clarification zone is provided with a ventilation pipe, through which the clarification zone is connected with the outside world.

8. The device for collecting and treating accident water in a thermal power plant according to claim 1, characterized in that: A manhole is provided in the clarification area.

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