Inclined tube sedimentation tank structure of skid-mounted treatment equipment for coal bed gas drainage and mining water

Abstract

The utility model discloses an inclined tube sedimentation tank structure of skid-mounted treatment equipment for coal bed gas drainage and mining water. The inclined tube sedimentation tank structure solves the problem of how to optimize the sedimentation treatment capacity of integrated treatment equipment. A clear water overflow area (302) is arranged at the upper part in the inclined tube settling tank (301), an inclined tube reverse flow separation area (303) is arranged in the middle in the inclined tube settling tank (301), a sludge settling area (304) is arranged at the lower part in the inclined tube settling tank (301), an overflow groove (305) is formed in the clear water overflow area (302), and triangular notch water outlets (306) are formed in the top ends of vertical plates on the two sides of the overflow groove (305); an inclined tube row (307) is arranged in the inclined tube reverse flow separation area (303); a sludge hopper (308) is arranged at the middle part in the sludge precipitation area (304); and the inclined tube settling tank (301) is communicated with the flocculation reaction barrel (201) through the overflow outlet (213).

Description

Technical Field

[0001] The utility model relates to water pollution treatment equipment, in particular to the structure of an inclined tube sedimentation tank in a skid-mounted treatment equipment for coal bed gas drainage and production water. Background Art

[0002] At present, the water pollution risks brought by coalbed methane exploitation are becoming increasingly prominent; in the process of coalbed methane exploitation, as the gas from the mined coal seams is extracted, a large amount of drainage water will be discharged from the gas wells. The drainage water contains suspended matter, organic matter, fluoride, petroleum and other pollutants. In particular, the pharmaceutical materials used in coalbed methane drilling and exploitation will also enter the production and drainage water along with the mining process, causing serious water pollution to the drainage water; the existing coalbed methane wells are relatively scattered, generally scattered in mountainous and hilly areas, with farmland and rivers nearby; the drainage water generated by multiple gas wells on site is generally collected, and the collected drainage water must be treated to remove pollutants in the water. The treated drainage water is generally discharged on-site into surface rivers; therefore, the pollution treatment of coalbed methane drainage water has become a top priority for the local society and production enterprises.

[0003] For the treatment of coalbed methane drainage water, if it is treated in the same way as traditional industrial wastewater, it is necessary to build a ground sewage treatment station, requisition land and equip corresponding water treatment equipment, which has the disadvantages of long construction time and large area. Due to the dispersion of coalbed methane wells and the limited continuous mining time, it is neither economical nor practical to equip the gas wells with fixed ground sewage treatment stations. How to design a movable integrated drainage water treatment equipment that can be easily moved according to the on-site conditions has become an urgent requirement for coalbed methane drainage water treatment.

[0004] The main pollutants in coalbed methane drainage water are suspended solids pollution and ammonia nitrogen pollution. Generally, the treatment method of coagulation → sedimentation → sand filtration → ultrafiltration is adopted, and the sedimentation link is an important pollutant removal link. According to the relative directions of water flow and mud flow, the existing technology can divide the inclined plate and inclined tube sedimentation tank into three types: countercurrent flow, cocurrent flow and lateral flow (transverse flow), among which the countercurrent inclined plate and inclined tube sedimentation tank is the most widely used. The characteristics of the countercurrent flow are: water flows upward and mud flows downward, the inclined tube is set at an angle, and many dense inclined tubes are set in the sedimentation link, so that the suspended impurities in the water are precipitated in the inclined tube, the water flows upward along the inclined tube, and the separated mud residue slides down to the bottom of the pool under the action of gravity, and then discharged in a concentrated manner. This tank body can improve the sedimentation efficiency by 50-60%, and the treatment capacity can be increased by 3-5 times on the same area. However, according to the characteristics of coalbed methane drainage sewage, how to set the structure of the overflow weir and other components in the sedimentation tank to optimize the sedimentation treatment capacity and effect of the integrated treatment equipment is a problem that needs to be solved on site. Summary of the invention

[0005] The utility model provides a structure of an inclined tube sedimentation tank for a skid-mounted treatment device for coalbed methane drainage water, solving the technical problem of how to optimize the sedimentation treatment capacity and effect of an integrated treatment device.

[0006] The utility model solves the above technical problems through the following technical solutions:

[0007] A structure of an inclined tube sedimentation tank for a skid-mounted treatment device for coalbed methane drainage water includes an inclined tube sedimentation area. An inclined tube clarification area is arranged at the upper part in the inclined tube sedimentation area. An inclined tube separation area is arranged at the middle part in the inclined tube sedimentation area. A sediment sludge area is arranged at the lower part in the inclined tube sedimentation area. A water collection tank is arranged in the inclined tube clarification area. Triangular weir water outlets are arranged at the top ends of the vertical plates on both sides of the water collection tank. An inclined tube row is arranged in the inclined tube separation area. The included angle between the inclined tube row and the horizontal plane is 60 degrees. A sludge hopper is arranged at the middle part in the sediment sludge area. An electric sludge scraper is arranged on the bottom end surface of the inclined tube sedimentation area outside the sludge hopper. The inclined tube sedimentation area is communicated with a flocculation reaction area through an overflow outlet. The bottom end surface of the inclined tube sedimentation area outside the sludge hopper is an inclined surface inclined towards the center. The water level in the inclined tube sedimentation area is higher than the bottom end of the triangular weir water outlet and lower than the top end surfaces of the vertical plates on both sides of the water collection tank. The cross section of each inclined tube in the inclined tube row is in a hexagonal shape.

[0008] The water level in the inclined tube sedimentation area is lower than the water level in the flocculation reaction area.

[0009] The utility model is an important link for separating pollutants from clear water. The inclined hexagonal inclined tube row effectively separates flocs from clear water. The sedimented sludge in the inclined tube sedimentation area is scraped into the sludge hopper by controlling the electric sludge scraper and discharged into a sludge pool for drying treatment. The length and area of the water collection tank can be set according to the water inflow to achieve the balance of water inlet and outlet. Description of the Drawings

[0010] Figure 1 is a schematic structural diagram of the utility model. Detailed Embodiment

[0011] The following is a detailed description of the utility model with reference to the drawings:

[0012] The inclined tube sedimentation tank structure of a skid-mounted treatment device for coalbed methane drainage water includes an inclined tube sedimentation area 301. An inclined tube clarification area 302 is arranged at the upper part within the inclined tube sedimentation area 301. An inclined tube separation area 303 is arranged in the middle of the inclined tube sedimentation area 301. A sediment sludge area 304 is arranged at the lower part within the inclined tube sedimentation area 301. A water collecting tank 305 is arranged within the inclined tube clarification area 302. Triangular weir water outlets 306 are arranged at the top ends of the vertical plates on both sides of the water collecting tank 305. An inclined tube row 307 is arranged within the inclined tube separation area 303, and the included angle between the inclined tube row 307 and the horizontal plane is 60 degrees. A sludge hopper 308 is arranged in the middle of the sediment sludge area 304. An electric sludge scraper 309 is arranged on the bottom end surface of the inclined tube sedimentation area 301 outside the sludge hopper 308. The inclined tube sedimentation area 301 is connected to the flocculation reaction area 211 through an overflow water outlet 213. The bottom end surface of the inclined tube sedimentation area 301 outside the sludge hopper 308 is an inclined surface that slopes towards the center. The water level 310 in the inclined tube sedimentation area 301 is higher than the bottom end of the triangular weir water outlet 306 and lower than the top end surfaces of the vertical plates on both sides of the water collecting tank 305. The cross-section of each inclined tube in the inclined tube row 307 is hexagonal. The included angle between the inclined tube row 307 and the horizontal plane is 60 degrees. This inclination can ensure that the sludge deposited on the inclined tubes can slide smoothly to the bottom without siltation. The cross-section of each inclined tube in the inclined tube row 307 is hexagonal, which can obtain a larger effective sedimentation area.

[0013] When the instantaneous flow rate of the influent and effluent water in the flocculation reaction area 211 is 20 - 40 cubic meters per hour, the surface water load of the inclined tube row 307 is 10 cubic meters per hour per square meter. This surface water load well adapts to the characteristics of coalbed methane drainage sewage and effectively realizes the purification of sewage. The water level 310 in the inclined tube sedimentation area is lower than the water level in the flocculation reaction area 211. The water level difference between the two realizes the flow of coalbed methane drainage water from the flocculation reaction area 211 to the inclined tube clarification area 301, making the water in each unit of the sewage treatment in the entire skid in a flowing state.

[0014] The drainage water that has formed flocs through flocculation reaction enters the inclined tube sedimentation area, ensuring that the flocs do not break. Then it enters the sedimentation area, where the coagulated flocs precipitate to the bottom of the pool. The upper part of the sediment sludge area is equipped with an inclined tube row, whose main function is to guide the flow and avoid the lateral flow of water, reducing the influence of the lateral flow on the sedimentation effect. In the inclined tube separation area, the fine flocs are further removed on the inclined tubes. The clarified supernatant water flows into the reuse water tank by gravity after passing through the water collecting tank 305.

Claims

1. The inclined tube sedimentation tank structure of a skid-mounted treatment device for coalbed methane drainage water, comprising an inclined tube sedimentation area (301), characterized in that, An inclined tube clarification zone (302) is arranged at the upper part in the inclined tube sedimentation zone (301), an inclined tube separation zone (303) is arranged at the middle part in the inclined tube sedimentation zone (301), a sediment sludge zone (304) is arranged at the lower part in the inclined tube sedimentation zone (301), a water collecting tank (305) is arranged in the inclined tube clarification zone (302), and triangular weir water outlets (306) are arranged at the top ends of the two side vertical plates of the water collecting tank (305); an inclined tube row (307) is arranged in the inclined tube separation zone (303), and the included angle between the inclined tube row (307) and the horizontal plane is 60 degrees; a sludge hopper (308) is arranged at the middle part in the sediment sludge zone (304), and an electric sludge scraper (309) is arranged on the bottom end surface of the inclined tube sedimentation zone (301) outside the sludge hopper (308); the inclined tube sedimentation zone (301) is communicated with the flocculation reaction zone (211) through an overflow outlet (213); the bottom end surface of the inclined tube sedimentation zone (301) outside the sludge hopper (308) is an inclined surface inclined towards the center; the water level (310) in the inclined tube sedimentation zone (301) is higher than the bottom end of the triangular weir water outlet (306) and lower than the top end surfaces of the two side vertical plates of the water collecting tank (305); the cross section of each inclined tube in the inclined tube row (307) is hexagonal.

2. The inclined tube sedimentation tank structure of a skid-mounted treatment device for coalbed methane drainage water according to claim 1, characterized in that, The water level (310) in the inclined tube sedimentation zone is lower than the water level in the flocculation reaction zone (211).

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