Domestic sewage treatment device for coal mine area

Abstract

The utility model discloses a domestic sewage treatment device for a coal mine area, which comprises a grating room which is sequentially connected with a water collecting tank, a sedimentation tank, an adjusting tank, an AO treatment tank, an MBR membrane biological treatment tank and a reuse water tank, the AO treatment tank comprises an anoxic biological treatment tank and an aerobic biological treatment tank, and the lower part of the tank wall of the anoxic biological treatment tank is communicated with the aerobic biological treatment tank; the upper part of the tank wall of the aerobic biological treatment tank is communicated with the MBR membrane biological treatment tank; a microporous aeration head, an MBR membrane assembly and a second mixed liquid reflux pump are arranged in the MBR membrane biological treatment tank, an outlet of the MBR membrane assembly is connected with an MBR water producing pump and is connected with a recycling water tank through a pipeline, and an outlet of the second mixed liquid reflux pump is connected to the aerobic biological treatment tank through a pipeline; and the microporous aeration head is connected with an air blower room through an air supply pipe. The AO process and the membrane biological MBR process are combined, so that the hydraulic retention time and the sludge retention time are efficiently separated, and the sewage treatment flow is shortened.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the sewage treatment technical field relates to a coal mine area domestic sewage treatment device. BACKGROUND

[0002] In recent years, China's coal industry has developed rapidly, and mine environmental protection has attracted people's attention. Under the new situation of double carbon target and energy saving and emission reduction concept, more economical and effective treatment methods are needed for coal mine sewage to achieve the goal of green, low carbon and environmental protection. With the continuous improvement of coal mining technology and the production and living standards of coal workers, a large amount of domestic sewage is generated during mine operation. If the domestic sewage cannot be effectively treated and reused, it will cause serious pollution to the local water resources environment. The treated domestic sewage in the coal mine area belongs to water resources, which can be used for water replenishment in coal washing plants, road washing, site greening and fire prevention pulp making.

[0003] At present, the main method for treating domestic sewage in coal mine area is activated sludge method. The activated sludge method is suitable for medium and high concentration sewage with large fluctuation range of water quality and quantity, but the sludge water separation efficiency of this method is low. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a coal mine area domestic sewage treatment device, which solves the problem of low sludge water separation efficiency in the prior art.

[0005] The utility model adopts the technical scheme that,

[0006] The coal mine area domestic sewage treatment device comprises a grid chamber, and the grid chamber is sequentially connected with a water collecting pool, a sedimentation tank, a regulating pool, an AO (anaerobic-oxygen) treatment tank, an MBR (membrane biological reactor) membrane biological treatment tank and a reused water pool. The AO treatment tank comprises an anoxic biological treatment tank and an aerobic biological treatment tank. The lower part of the pool wall of the anoxic biological treatment tank is in communication with the aerobic biological treatment tank. The upper part of the pool wall of the aerobic biological treatment tank is in communication with the MBR membrane biological treatment tank. A microporous aeration head, an MBR membrane assembly and a second mixed liquid reflux pump are arranged in the MBR membrane biological treatment tank. The outlet of the MBR membrane assembly is connected with an MBR water production pump and connected with the reused water pool through a pipeline. The outlet of the second mixed liquid reflux pump is connected with the aerobic biological treatment tank through a pipeline. The microporous aeration head is connected with a blower room through a blast pipe.

[0007] The utility model has the characteristics that,

[0008] The microporous aeration head and a first mixed liquid reflux pump are arranged at the bottom of the aerobic biological treatment tank. The outlet of the first mixed liquid reflux pump is connected with the anoxic biological treatment tank through a pipeline.

[0009] The mechanical grid is arranged in the grid chamber, a hole is formed in the pool wall of the grid chamber on the water outlet side of the mechanical grid, and a water collecting pool is connected below the side of the grid chamber; a first sewage lifting pump is arranged at the bottom of the water collecting pool, and the water outlet of the first sewage lifting pump is connected with a sedimentation tank through a pipeline; a water flow output channel is formed in the upper portion of the pool wall of the sedimentation tank to communicate with a regulating tank; a second sewage lifting pump is arranged at the bottom of the regulating tank, and the outlet of the second sewage lifting pump is sequentially connected with a water distribution valve well and an anoxic biological treatment tank through a pipeline.

[0010] A grid residue trolley is arranged at the outlet of the mechanical grid.

[0011] First and second submersible slurry pumps are arranged at the bottoms of the sedimentation tank and the aerobic biological treatment tank respectively, the outlets of the first and second submersible slurry pumps are connected with a sludge tank through a pipeline, a third submersible slurry pump is arranged at the bottom of the sludge tank, and the outlet of the third submersible slurry pump is connected with a sludge concentration tank through a pipeline; the upper portion of the sludge concentration tank is connected with the regulating tank through a pipeline, and the bottom of the sludge concentration tank is sequentially connected with a sludge screw pump and a plate-and-frame filter press through a pipeline.

[0012] An MBR membrane cleaning water pump is arranged at the bottom of the recycled water pool, and the outlet of the MBR membrane cleaning water pump is connected between an MBR water production pump and an MBR membrane assembly through a pipeline.

[0013] A recycled water pump and a residual chlorine detection sampling pump are arranged in the recycled water pool, and the outlet of the recycled water pump is connected with each water use point.

[0014] Water quality detectors are arranged above the water collecting pool, the aerobic biological treatment tank, the MBR membrane biological treatment tank and the recycled water pool.

[0015] Ultrasonic liquid level meters are arranged above the water collecting pool, the regulating tank, the aerobic biological treatment tank, the MBR membrane biological treatment tank, the recycled water pool, the sludge tank and the sludge concentration tank, and pressure sensors are arranged in the outlets and inlets of the first sewage lifting pump, the second sewage lifting pump, the first submersible slurry pump, the second submersible slurry pump, the third submersible slurry pump and the MBR water production pump.

[0016] Mixers are arranged in the water collecting pool, the sedimentation tank, the regulating tank, the anoxic biological treatment tank and the sludge tank.

[0017] The utility model discloses the beneficial effects are:

[0018] (1) the utility model discloses that AO process and membrane biology MBR process are combined, adopt efficient membrane separation technology to replace the two sedimentation tank in traditional activated sludge process, realize the efficient separation of hydraulic retention time and sludge retention time, strengthen the denitrification and phosphorus removal effect of system, and the sludge production is less, and the removal efficiency of effluent water quality pollutant is high, and the water quality is excellent and stable, meets the surface water recharge requirement, improves the reuse rate of water resources.

[0019] (2) The utility model discloses adopt AO process and membrane biological MBR process combination, and the sewage treatment flow is shortened, and operation control is more flexible, and the device occupies small area, and simultaneously easy to realize the full automation control from the water inlet to the water outlet, reduces the workload of manual operation and management, reduces the operation cost. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the structure schematic diagram of coal mine area domestic sewage treatment device of the utility model,

[0021] Figure 2 It is the water treatment flow chart of coal mine area domestic sewage treatment device of the utility model.

[0022] In the drawing, 1. grid room, 2. mechanical grid, 3. grid residue trolley, 4. stirrer, 5. water collecting pool, 601. first sewage lifting pump, 602. second sewage lifting pump, 7. water quality and quantity detector, 8. sedimentation tank, 901. first submersible slurry pump, 902. second submersible slurry pump, 903. third submersible slurry pump, 10. regulating pool, 11. water distribution valve well, 12. anoxic biological treatment tank, 13. aerobic biological treatment tank, 14. microporous aeration head, 151. first mixed liquor return pump, 152. second mixed liquor return pump, 16. MBR membrane biological treatment tank, 17. MBR membrane assembly, 18. MBR water production pump, 19. recycled water pool, 20. MBR membrane cleaning water pump, 21. residual chlorine detection sampling pump, 22. recycled water pump, 23. air blower room, 24. sludge tank, 25. sludge concentration tank, 26. sludge screw pump, 27. plate-and-frame filter press, 28. ultrasonic liquid level meter, DETAILED DESCRIPTION

[0023] The following will be specifically described in conjunction with specific embodiments.

[0024] As Figure 1 Shown, coal mine area domestic sewage treatment device, including grid room 1, set up mechanical grid 2 in grid room 1, grid width 1000mm, set up stainless steel grid residue trolley 3 at the outlet of mechanical grid 2, for collecting and transporting grid residue. The inner wall of grid room 1 is provided with a hole on the water outlet side of mechanical grid 2, and the lower side of grid room 1 is connected to water collecting pool 5, and sewage flows into water collecting pool 5 through the hole.

[0025] Stirrer 4 is arranged in water collecting pool 5, a plurality of first sewage lifting pumps 601 are arranged at the bottom, water quality and quantity detector 7 and ultrasonic liquid level meter 28 are arranged above the pool, for detecting water quality and observing water surface height. The water outlet of first sewage lifting pump 601 is connected to sedimentation tank 8 through pipeline.

[0026] The stirring machine 4 is arranged in the sedimentation tank 8, and a plurality of first submersible sludge pumps 901 are arranged at the bottom. The outlet pipe of the first submersible sludge pump 901 is connected to the sludge tank 24 through a pipeline. The water flow output channel is arranged on the wall of the sedimentation tank 8 to communicate with the adjusting tank 10, so that the water flow overflows from the sedimentation tank 8 into the adjusting tank 10.

[0027] The stirring machine 4 and the ultrasonic liquid level meter 28 are arranged in the adjusting tank 10, and the second sewage lifting pump 602 is arranged at the bottom. The outlet of the second sewage lifting pump 602 is connected to the water distribution valve well 11 and the anoxic biological treatment tank 12 through a pipeline in sequence. The water distribution valve well 11 can adjust the sewage flow and balance the water quantity in each tank. In the adjusting tank 10, the ultrasonic liquid level meter 28 and the second sewage lifting pump 602 are linked to control each other. When the liquid level is high, the pump is started. When the liquid level is low, the pump is stopped. When the water pump fails, the standby water pump is automatically started. At the same time, the ultrasonic liquid level meter 28 and the stirring machine 4 are interlocked. When the liquid level is low, the stirring machine stops working.

[0028] The anoxic biological treatment tank 12 is provided with a plurality of stirring machines 4 and elastic fillers with a length of 2.0 m. The contact area of sludge and domestic sewage is increased. The water flow output hole is arranged on the lower part of the wall to communicate with the aerobic biological treatment tank 13. The water quality and quantity detector 7 and the ultrasonic liquid level meter 28 are arranged above the aerobic biological treatment tank 13 to detect the water quality and observe the water surface height. The second submersible sludge pump 902 and the first mixed liquid reflux pump 151 are arranged at the bottom of the tank. The outlet of the second submersible sludge pump 902 is connected to the sludge tank 24 through a pipeline. The outlet of the first mixed liquid reflux pump 151 is connected to the anoxic biological treatment tank 12 through a pipeline. Two-layer combined fillers are used in the aerobic biological treatment tank 13. The micro-porous aeration head 14 is arranged at the bottom. The aeration pipe is made of UPVC material. The aeration pipe is connected to the air blower room 23 through the air supply pipe. The air source is provided by the Roots blower. The dissolved oxygen meter and the pH detector are installed at the bottom of the aerobic biological treatment tank 13 to detect the sewage quality and adjust the aeration amount in time. The water flow output hole is arranged on the upper part of the wall of the aerobic biological treatment tank 13 to communicate with the MBR membrane biological treatment tank 16. The planar sizes of the anoxic and aerobic biological treatment tanks are 7.5 m x 3.0 m and 7.5 m x 9.0 m respectively.

[0029] The micro-porous aeration head 14, the MBR membrane assembly 17 and the second mixed liquid reflux pump 152 are arranged in the MBR membrane biological treatment tank 16. The outlet of the MBR membrane assembly 17 is connected to the MBR water production pump 18 and the reuse water tank 19 through a pipeline. The outlet of the second mixed liquid reflux pump 152 is connected to the aerobic biological treatment tank 13 through a pipeline. The micro-porous aeration head 14 is connected to the air blower room 23 through the air supply pipe. The air source is provided by the Roots blower. The water quality and quantity detector 7 and the ultrasonic liquid level meter 28 are arranged above the MBR membrane biological treatment tank 16. The MBR membrane biological treatment tank 16 adopts the plate-type membrane assembly. The MBR water production pump 18 is used in turn. The pressure sensor is matched with the inlet and outlet of the water pump. The MBR water production pump 18 is linked to control the MBR membrane assembly 17 and the liquid level in the MBR membrane biological treatment tank 16.

[0030] An MBR membrane cleaning pump 20, a residual chlorine detection and sampling pump 21, and a reuse water pump 22 are installed at the bottom of the reclaimed water tank 19. The outlet of the MBR membrane cleaning pump 20 is connected to the MBR permeate pump 18 and the MBR membrane module 17 via a pipeline. After the forward operation cycle is completed, the MBR permeate pump 18 switches to backwash mode to backwash the MBR membrane module 17, where the backwash filter inside the MBR membrane module 17 has a precision of 20μm. The permeate water from the reuse water pump 22 is connected to the plant's reclaimed water network and returned to the point of use. The reclaimed water tank 19 uses chlorine dioxide disinfection. The residual chlorine detection and sampling pump 21 is connected to a biochemical oxygen demand (BOD) analyzer and a residual chlorine analyzer. The BOD analyzer has a measurement range of 0–200 mg / L, and the residual chlorine analyzer has a measurement range of 0–200 ppm. A water quality and quantity detector 7 and an ultrasonic level gauge 28 are also installed above the reclaimed water tank 19.

[0031] A mixer 4 is installed inside the sludge tank 24 to prevent sludge stratification and increase the contact area with microorganisms. An ultrasonic level gauge 28 is installed above the sludge tank 24 to observe the water level. A third submersible slurry pump 903 is installed at the bottom of the tank, and the third submersible slurry pump 903 is connected to the sludge thickening tank 25 through a pipeline.

[0032] The bottom of the sludge thickening tank 25 is connected by pipes to a sludge screw pump 26 and a plate and frame filter press 27. An ultrasonic level gauge 28 is installed above the tank. The sludge thickening tank 25 uses gravity thickening. The supernatant is returned to the equalization tank 10. After thickening, the sludge at the bottom of the tank is pumped by the sludge screw pump 26 to the plate and frame filter press 27 for sludge dewatering. The filter plate size is 1.0m × 1.0m, the filter chamber volume is 1000L, and the added agent is polyacrylamide (PAM).

[0033] like Figure 2 As shown, domestic sewage from the coal mining area is filtered through a screen chamber 1 and then enters a collection tank 5. It is then pumped to a sedimentation tank 8 by a first sewage lift pump 601. The sewage overflows from the sedimentation tank 8 into a regulating tank 10, while the sludge is pumped into a sludge tank 24 by a first submersible sludge pump 901. In the regulating tank 10, the sewage is pumped into an anoxic biological treatment tank 12 by a second sewage lift pump 602, and then sequentially into an aerobic biological treatment tank 13 and an MBR membrane biological treatment tank 16. In both the aerobic biological treatment tank 13 and the MBR membrane biological treatment tank 16, aeration is provided through microporous aeration heads 14. The sewage from both tanks is then returned to the anoxic biological treatment tank 12 and the aerobic biological treatment tank 13 for further treatment via a first mixed liquor return pump 151 and a second mixed liquor return pump 152, respectively. The settled sludge is discharged into the sludge tank 24. The water treated in the MBR membrane biological treatment tank 16 enters a reuse water tank 19, is disinfected, and then pressurized before being returned to the point of use.

[0034] The sludge in the sludge tank 24 enters the sludge concentration tank 25 through the third submersible sludge pump 903, and after gravity concentration, the supernatant returns to the adjusting tank 10, and the sludge is further dewatered by the sludge screw pump 26 and the plate and frame filter press 27 and then transported out.

[0035] When the coal mine area domestic sewage treatment device is used to treat sewage, the coal mine area domestic sewage is discharged into the grid chamber 1, and the specific suspended solids and impurities in the domestic sewage are filtered by the mechanical grid 2 and transported out by the grid residue trolley 3. The filtered sewage flows into the water collecting tank 5 through the holes on the pool wall of the grid chamber 1, and the agitator 4 in the water collecting tank 5 operates to stir, prevent the sedimentation of sewage sand, improve the mixing and oxygen transfer rate during the treatment process, and then the first sewage lifting pump 601 lifts the sewage to the sedimentation tank 8. The agitator 4 in the sedimentation tank 8 operates to stir, and the sewage in the tank overflows into the adjusting tank 10 through the water flow output channel, and the first submersible sludge pump 901 discharges the sludge at the bottom of the sedimentation tank 8 to the sludge tank 24. The agitator 4 in the adjusting tank 10 operates to stir, and the second sewage lifting pump 602 lifts the sewage to the anoxic biological treatment tank 12 through the water distribution valve well 11, and the adjusting tank 10 is also provided with a pH adjusting device to further balance the water quality to pH 6-9.

[0036] The agitator 4 in the anoxic biological treatment tank 12 operates to stir, and the sewage flows into the aerobic biological treatment tank 13 through the water flow output holes at the bottom of the tank wall. The micro-porous aeration head 14 at the bottom of the aerobic biological treatment tank 13 is staggered to increase the mixing degree of the sewage and the aerobic bacteria, and further increase the water purification capacity. In the aerobic biological treatment tank 13, microorganisms remove most of the organic pollutants such as BOD and chemical oxygen demand (COD) in the water through adsorption and degradation. At the same time, nitrification reaction is carried out to convert organic nitrogen and ammonia nitrogen in the sewage into nitrate nitrogen, which is returned to the anoxic biological treatment tank 12 through the first mixed liquid return pump 151. The microorganisms in the anoxic biological treatment tank 12 degrade large molecular organic matter in the sewage into small molecular organic matter, and the denitrifying bacteria reduce the returned nitrate nitrogen to nitrogen gas using the organic matter in the sewage as a carbon source. At this time, the microorganisms in the activated sludge in the aerobic biological treatment tank 13 accumulate phosphorus, absorb a large amount of dissolved phosphorus, convert it into insoluble polyphosphate and store it in the body, and the remaining sludge is discharged to the sludge tank 24 through the second submersible sludge pump 902 at the bottom of the tank, achieving the purpose of phosphorus removal in the system. At the same time, in view of the characteristics of the coal mine area domestic sewage that the biodegradability is not strong, a BOD / COD concentration sensor is arranged in the anoxic biological treatment tank 12, and when the sensor ratio is lower than 0.3, the corresponding carbon source is added.

[0037] The sewage flows into the MBR membrane biological treatment tank 16 through the water flow output hole opened on the upper part of the tank wall of the aerobic biological treatment tank 13, and then is subjected to deep treatment. The microporous aeration head 14 at the bottom of the tank aerates the tank, and the MBR membrane assembly 17 immersed in the membrane biological reaction tank further treats the sewage mixture, removes SS (suspended solids), oil substances, COD-required pollutants and the like in the water, and after treatment, the treated water enters the reuse water tank 19 through the MBR water production pump 18. The second mixed liquid reflux pump 152 in the MBR membrane biological treatment tank 16 further lifts the sewage in the tank to the aerobic biological treatment tank 13. The MBR membrane biological treatment tank 16 is also provided with a dissolved oxygen and pH detector.

[0038] The treated water source is disinfected in the reuse water tank 19, the residual chlorine detection sampling pump 21 in the tank extracts water samples for detection by the BOD detector and the residual chlorine detector, and after reaching the standard, the water is pumped to the reuse water point by the reuse water pump 22 for use as reuse water in the plant area.

[0039] The agitator 4 in the sludge tank 24 is operated to stir, and the sludge is lifted to the sludge thickening tank 25 by the third submersible slurry pump 903. The tank adopts weight thickening, and the supernatant is returned to the adjustment tank 10 in layers. The sludge at the bottom of the tank is further thickened and dewatered, and is pumped to the plate and frame filter press 27 by the sludge screw pump 26 for dewatering and pressure filtration and then discharged.

[0040] After the coal mine area domestic sewage treatment is completed, the MBR membrane cleaning water pump 20 in the reuse water tank 19 is started to perform reverse cleaning on the MBR membrane assembly 17.

[0041] In an example of the present application, the influent is domestic sewage of a coal mine, and the main water quality indicators of the influent are COD of 100-300 mg / L, BOD of 60-150 mg / L, SS of 120-200 mg / L, NH3-N (ammonia nitrogen) of 15-20 mg / L, TP (total phosphorus) of 1-5.5 mg / L, and dissolved oxygen of 0-0.3 mg / L. According to the implementation scheme of the present application, after system treatment, the water quality indicators of the effluent are COD < 50 mg / L, BOD < 10 mg / L, SS < 10, NH3-N < 8 mg / L, and TP < 0.5 mg / L, and the water quality of the effluent meets the higher value of the watering road, greening standard in the “Urban Sewage Reuse Urban Miscellaneous Water Quality” (GB / T 18920-2020) and the coal washing water quality standard in the “Coal Washing Engineering Design Specification” (GB50359-2016).

[0042] Example 1

[0043] The coal mine area domestic sewage treatment device comprises a grid chamber 1, the grid chamber 1 is sequentially connected with a water collecting pool 5, a sedimentation tank 8, a regulating pool 10, an AO treatment pool, an MBR membrane biological treatment pool 16 and a reuse water pool 19.

[0044] Example 2

[0045] The coal mine area domestic sewage treatment device comprises a grid chamber 1, the grid chamber 1 is sequentially connected with a water collecting pool 5, a sedimentation tank 8, a regulating pool 10, an AO treatment pool, an MBR membrane biological treatment pool 16 and a reuse water pool 19.

[0046] The bottom of the aerobic biological treatment pool 13 is provided with a microporous aeration head 14 and a first mixed liquid reflux pump 151, and the outlet of the first mixed liquid reflux pump 151 is connected to the anoxic biological treatment pool 12 through a pipeline.

[0047] Example 3

[0048] The coal mine area domestic sewage treatment device comprises a grid chamber 1, the grid chamber 1 is sequentially connected with a water collecting pool 5, a sedimentation tank 8, a regulating pool 10, an AO treatment pool, an MBR membrane biological treatment pool 16 and a reuse water pool 19; the AO treatment pool comprises an anoxic biological treatment pool 12 and an aerobic biological treatment pool 13, the lower part of the pool wall of the anoxic biological treatment pool 12 is communicated with the aerobic biological treatment pool 13; the upper part of the pool wall of the aerobic biological treatment pool 13 is communicated with the MBR membrane biological treatment pool 16; a microporous aeration head 14, an MBR membrane assembly 17 and a second mixed liquid reflux pump 152 are arranged in the MBR membrane biological treatment pool 16, the outlet of the MBR membrane assembly 17 is connected with an MBR water production pump 18 and connected with the reuse water pool 19 through a pipeline, the outlet of the second mixed liquid reflux pump 152 is connected to the aerobic biological treatment pool 13 through a pipeline; the microporous aeration head 14 is connected with a blower room 23 through an air supply pipe.

[0049] A mechanical grid 2 is arranged in the grid chamber 1, a hole is formed in the pool wall of the grid chamber 1 at the water outlet side of the mechanical grid 2, and the water collecting pool 5 is connected to the lower side of the grid chamber 1; a first sewage lifting pump 601 is arranged at the bottom of the water collecting pool 5, and the water outlet of the first sewage lifting pump 601 is connected with the sedimentation tank 8 through a pipeline; a water flow output channel is formed in the upper part of the pool wall of the sedimentation tank 8 and communicated with the regulating pool 10; a second sewage lifting pump 602 is arranged at the bottom of the regulating pool 10, and the outlet of the second sewage lifting pump 602 is connected with a water distribution valve well 11 and the anoxic biological treatment pool 12 in sequence through a pipeline.

[0050] A grid residue trolley 3 is arranged at the outlet of the mechanical grid 2.

[0051] Example 4

[0052] The coal mine area domestic sewage treatment device comprises a grid chamber 1, the grid chamber 1 is sequentially connected with a water collecting pool 5, a sedimentation tank 8, a regulating pool 10, an AO treatment pool, an MBR membrane biological treatment pool 16 and a reuse water pool 19; the AO treatment pool comprises an anoxic biological treatment pool 12 and an aerobic biological treatment pool 13, the lower part of the pool wall of the anoxic biological treatment pool 12 is communicated with the aerobic biological treatment pool 13; the upper part of the pool wall of the aerobic biological treatment pool 13 is communicated with the MBR membrane biological treatment pool 16; a microporous aeration head 14, an MBR membrane assembly 17 and a second mixed liquid reflux pump 152 are arranged in the MBR membrane biological treatment pool 16, the outlet of the MBR membrane assembly 17 is connected with an MBR water production pump 18 and connected with the reuse water pool 19 through a pipeline, the outlet of the second mixed liquid reflux pump 152 is connected to the aerobic biological treatment pool 13 through a pipeline; the microporous aeration head 14 is connected with a blower room 23 through an air supply pipe.

[0053] The first submersible slurry pump 901 and the second submersible slurry pump 902 are arranged at the bottoms of the sedimentation tank 8 and the aerobic biological treatment tank 13 respectively, and the outlets of the first submersible slurry pump 901 and the second submersible slurry pump 902 are connected with the sludge tank 24 through pipelines; the third submersible slurry pump 903 is arranged at the bottom of the sludge tank 24, and the outlet of the third submersible slurry pump 903 is connected with the sludge concentration tank 25 through a pipeline; the sludge concentration tank 25 is connected with the adjusting tank 10 through a pipeline at the upper part, and is connected with the sludge screw pump 26 and the plate-and-frame filter press 27 through a pipeline at the bottom in sequence.

[0054] Example 5

[0055] The coal mine area domestic sewage treatment device comprises a grid room 1, and the grid room 1 is sequentially connected with a water collecting tank 5, a sedimentation tank 8, an adjusting tank 10, an AO treatment tank, an MBR membrane biological treatment tank 16 and a reuse water tank 19.

[0056] The MBR membrane cleaning water pump 20 is arranged at the bottom of the reuse water tank 19, and the outlet of the MBR membrane cleaning water pump 20 is connected to the MBR water production pump 18 and the MBR membrane assembly 17 through a pipeline.

[0057] Example 6

[0058] The coal mine area domestic sewage treatment device comprises a grid room 1, and the grid room 1 is sequentially connected with a water collecting tank 5, a sedimentation tank 8, an adjusting tank 10, an AO treatment tank, an MBR membrane biological treatment tank 16 and a reuse water tank 19.

[0059] The reuse water tank 19 is provided with a reuse water pump 22 and a residual chlorine detection sampling pump 21, and the outlet of the reuse water pump 22 is connected with each water use point.

[0060] Example 7

[0061] The coal mine area domestic sewage treatment device comprises a grid chamber 1, and the grid chamber 1 is sequentially connected with a water collecting pool 5, a sedimentation pool 8, an adjusting pool 10, an AO treatment pool, an MBR membrane biological treatment pool 16 and a reuse water pool 19.

[0062] The water quality and quantity detector 7 is arranged above the water collecting pool 5, the aerobic biological treatment pool 13, the MBR membrane biological treatment pool 16 and the reuse water pool 19.

[0063] Example 8

[0064] The coal mine area domestic sewage treatment device comprises a grid chamber 1, and the grid chamber 1 is sequentially connected with a water collecting pool 5, a sedimentation pool 8, an adjusting pool 10, an AO treatment pool, an MBR membrane biological treatment pool 16 and a reuse water pool 19.

[0065] The ultrasonic liquid level meter 28 is arranged above the water collecting pool 5, the adjusting pool 10, the aerobic biological treatment pool 13, the MBR membrane biological treatment pool 16, the reuse water pool 19, a sludge pool 24 and a sludge thickening tank 25, and the first sewage lifting pump 601, the second sewage lifting pump 602, the first submersible slurry pump 901, the second submersible slurry pump 902, the third submersible slurry pump 903 and the MBR water production pump 18 are all equipped with pressure sensors.

[0066] Example 9

[0067] The coal mine area domestic sewage treatment device, including the grid interval 1, the grid interval 1 is connected in turn water collecting pool 5, sedimentation tank 8, adjusting pool 10, AO treatment pool, MBR membrane biological treatment pool 16 with reuse water pool 19;AO treatment pool includes anoxic biological treatment pool 12 and aerobic biological treatment pool 13, the lower part of the pool wall of anoxic biological treatment pool 12 and aerobic biological treatment pool 13 are communicated;The upper part of the pool wall of aerobic biological treatment pool 13 and MBR membrane biological treatment pool 16 are communicated;The microporous aeration head 14, MBR membrane assembly 17 and second mixed liquid reflux pump 152 are set in MBR membrane biological treatment pool 16, the outlet of MBR membrane assembly 17 is connected with MBR water pump 18 and is connected with reuse water pool 19 through pipeline, the outlet of second mixed liquid reflux pump 152 is connected to aerobic biological treatment pool 13 through pipeline;The microporous aeration head 14 is connected with air blower room 23 through air supply pipe.

[0068] The agitator 4 is arranged in water collecting pool 5, sedimentation tank 8, adjusting pool 10, anoxic biological treatment pool 12 and sludge tank 24.

Claims

1. A sewage treatment device for coal mining areas, characterized in that, The system includes a screen chamber (1), which is sequentially connected to a collection tank (5), a sedimentation tank (8), an equalization tank (10), an AO treatment tank, an MBR membrane biological treatment tank (16), and a reclaimed water tank (19). The AO treatment tank includes an anoxic biological treatment tank (12) and an aerobic biological treatment tank (13). The lower part of the wall of the anoxic biological treatment tank (12) is connected to the aerobic biological treatment tank (13). The upper part of the wall of the aerobic biological treatment tank (13) is connected to the MBR membrane biological treatment tank (19). 6) Connectivity; The MBR membrane biological treatment tank (16) is equipped with a microporous aeration head (14), an MBR membrane module (17) and a second mixed liquor return pump (152). The outlet of the MBR membrane module (17) is connected to the MBR permeate pump (18) and connected to the recycled water tank (19) through a pipeline. The outlet of the second mixed liquor return pump (152) is connected to the aerobic biological treatment tank (13) through a pipeline. The microporous aeration head (14) is connected to the blower room (23) through an air supply pipe.

2. The coal mine domestic sewage treatment device according to claim 1, characterized in that, The bottom of the aerobic biological treatment tank (13) is provided with a microporous aeration head (14) and a first mixed liquor return pump (151). The outlet of the first mixed liquor return pump (151) is connected to the anoxic biological treatment tank (12) through a pipeline.

3. The coal mine domestic sewage treatment device according to claim 1, characterized in that, Mechanical screens (2) are installed in the screen chamber (1). Holes are opened on the pool wall of the mechanical screen (2) on the outlet side of the screen chamber (1). A collection pool (5) is connected to the lower side of the screen chamber (1). A first sewage lift pump (601) is installed at the bottom of the collection pool (5). The outlet of the first sewage lift pump (601) is connected to the sedimentation tank (8) through a pipe. The upper part of the sedimentation tank (8) is connected to the regulating tank (10). A second sewage lift pump (602) is installed at the bottom of the regulating tank (10). The outlet of the second sewage lift pump (602) is connected to the water distribution valve well (11) and the anoxic biological treatment tank (12) through a pipe.

4. The coal mine domestic sewage treatment device according to claim 3, characterized in that, Mechanical bar screen (2) is equipped with a screening trolley (3) at the outlet.

5. The coal mine domestic sewage treatment device according to claim 1, characterized in that, A first submersible slurry pump (901) and a second submersible slurry pump (902) are respectively installed at the bottom of the sedimentation tank (8) and the aerobic biological treatment tank (13). The outlets of the first submersible slurry pump (901) and the second submersible slurry pump (902) are connected to the sludge tank (24) through pipes. A third submersible slurry pump (903) is installed at the bottom of the sludge tank (24). The outlet of the third submersible slurry pump (903) is connected to the sludge thickening tank (25) through pipes. The upper part of the sludge thickening tank (25) is connected to the regulating tank (10) through pipes, and the bottom is connected to the sludge screw pump (26) and the plate and frame filter press (27) in sequence through pipes.

6. The coal mine domestic sewage treatment device according to claim 1, characterized in that, The bottom of the recycled water tank (19) is equipped with an MBR membrane cleaning water pump (20), and the outlet of the MBR membrane cleaning water pump (20) is connected to the MBR product water pump (18) and the MBR membrane module (17) through a pipeline.

7. The coal mine domestic sewage treatment device according to claim 1, characterized in that, The recycled water tank (19) is equipped with a recycled water pump (22) and a residual chlorine detection and sampling pump (21), and the outlet of the recycled water pump (22) is connected to each water point.

8. The coal mine domestic sewage treatment device according to claim 1, characterized in that, Water quality and quantity detectors (7) are installed above the water collection tank (5), aerobic biological treatment tank (13), MBR membrane biological treatment tank (16) and reclaimed water tank (19).

9. The coal mine domestic sewage treatment device according to claim 1, characterized in that, Ultrasonic level gauges (28) are installed above the water collection tank (5), equalization tank (10), aerobic biological treatment tank (13), MBR membrane biological treatment tank (16), reclaimed water tank (19), sludge tank (24) and sludge thickening tank (25). Pressure sensors are installed at the inlet and outlet of the first sewage lift pump (601), the second sewage lift pump (602), the first submersible slurry pump (901), the second submersible slurry pump (902), the third submersible slurry pump (903) and the MBR permeate pump (18).

10. The coal mine domestic sewage treatment device according to claim 1, characterized in that, A mixer (4) is installed in the water collection tank (5), sedimentation tank (8), equalization tank (10), anoxic biological treatment tank (12) and sludge tank (24).

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