Purification membrane system for high-altitude culture sewage treatment

Abstract

The invention provides a purification membrane system for high-altitude culture sewage treatment, which comprises an anaerobic fermentation tank, a collection box, a filter cartridge and a treatment box, the top of the anaerobic fermentation tank is open, a transparent protective cover is arranged at the top of the anaerobic fermentation tank, a pipeline communicated with the bottom of the inner cavity of the anaerobic fermentation tank is arranged on the side surface of the collection box, and the filter cartridge is arranged in the collection box. A pump set communicated with the inner cavity of the collecting box is mounted on the side surface of the collecting box. According to the purification membrane system for high-altitude culture sewage treatment, culture sewage is filtered for multiple times, and the content of solid excrement, feed residues, animal hair and the like in the sewage is reduced, so that the single-time use period of the membrane reactor is prolonged, the cleaning or replacing frequency of the membrane reactor is reduced, and the sewage treatment efficiency is improved; the survival and reproduction of anaerobic microorganisms and aerobic microorganisms are facilitated, the treatment of organic matters, nitrogen, phosphorus and other nutrient substances in the sewage is facilitated, and the culture sewage treatment quality is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and particularly to a purification membrane system for treating high-altitude aquaculture sewage. Background Art

[0002] With the rapid development of intensive and large-scale livestock and poultry farming, while driving economic growth, the resulting environmental pollution problems are becoming increasingly serious. During the farming process, excreta, feed residues, and flushing water of livestock and poultry will form a large amount of sewage. This kind of sewage contains a large amount of organic matter, nitrogen, phosphorus and other nutrients. If directly discharged without treatment, it will cause eutrophication of water bodies, and then lead to water quality deterioration, which not only affects the water use safety of humans and other organisms, but also destroys the ecological balance. In addition, heavy metals and harmful substances in the aquaculture sewage will seep into the soil, affecting the growth of crops, and the aquaculture sewage may carry a large number of pathogenic microorganisms, such as bacteria, viruses, etc., posing a threat to public health safety.

[0003] The climate in high-altitude areas is special, mainly manifested as low temperature, large temperature difference between day and night, etc., resulting in difficult survival and reproduction of microorganisms. At present, membrane reactors are usually used to purify aquaculture sewage in high-altitude areas. However, solid excreta, feed residues, etc. contained in the sewage are likely to affect the use of the membrane reactor, and it is necessary to frequently clean or replace the membrane reactor, resulting in difficult treatment of aquaculture sewage. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the existing defects, and provide a purification membrane system for treating high-altitude aquaculture sewage. By filtering the aquaculture sewage multiple times, the content of solid excreta, feed residues, animal hairs, etc. in the sewage is reduced, thereby extending the single-use cycle of the membrane reactor, reducing the frequency of its cleaning or replacement, improving the sewage treatment efficiency. In addition, the temperature in this purification membrane system is controllable, which is conducive to the survival and reproduction of anaerobic microorganisms and aerobic microorganisms, facilitating the treatment of organic matter, nitrogen, phosphorus and other nutrients in the sewage, and improving the quality of aquaculture sewage treatment, and can effectively solve the problems in the background art.

[0005] To achieve the above object, the present invention provides the following technical solution: A purification membrane system for treating high-altitude aquaculture sewage, comprising an anaerobic fermentation tank, a collection tank, a filter cylinder, and a treatment tank. The top of the anaerobic fermentation tank is open, and a transparent protective cover is provided on the top of the anaerobic fermentation tank. A pipeline communicating with the bottom of the inner cavity of the anaerobic fermentation tank is provided on the side of the collection tank, and a pump set communicating with the inner cavity of the collection tank is installed on the side of the collection tank. A downstream pipe communicating with the inner cavity of the filter cylinder is installed at the lower part of the side of the collection tank. The filter cylinder is inclined, and the top of the filter cylinder is open. A solid conveying component is arranged in the filter cylinder. An extrusion component is arranged at the open part of the filter cylinder. A filtering component is arranged at the lower part of the side of the filter cylinder, and a communicating pipe communicating with the inner cavity of the treatment tank is arranged on the side of the filtering component. An aeration component and several groups of membrane reactors are arranged in the treatment tank, and a cleaning component is arranged at a position close to the membrane reactor on the inner side of the treatment tank.

[0006] As a preferred technical solution of the present invention, a dirt injection pipe communicating with the inner cavity of the anaerobic fermentation tank is installed on the side of the anaerobic fermentation tank. The protective cover includes a positioning frame, and several transparent plates are installed in the positioning frame. An annular chute is arranged at the upper part of the inner side of the anaerobic fermentation tank. A water delivery pipe communicating with the bottom of the inner cavity of the chute is installed on the side of the anaerobic fermentation tank, and the other end of the water delivery pipe is fixed on the side of the collection tank and communicates with the inner cavity of the collection tank.

[0007] As a preferred technical solution of the present invention, several protective frames are arranged at the inner edge of the anaerobic fermentation tank. An installation opening is formed on the side of the protective frame, and a protective net is installed in the installation opening. A diversion pipe communicating with the bottom of the inner cavity is arranged between adjacent two protective frames, and the pipeline is located in one of the protective frames.

[0008] As a preferred technical solution of the present invention, the pipeline includes a extraction pipe, and the part of the extraction pipe located in the anaerobic fermentation tank is arranged vertically. A moving pipe is slidably arranged in the extraction pipe. A positioning rod is fixed in the extraction pipe, and a cone located in the moving pipe is fixed at the bottom of the positioning rod. A clamping ring is fixed in the anaerobic fermentation tank, and the clamping ring is sleeved outside the moving pipe. A protrusion is arranged in the middle of the side of the moving pipe, and the protrusion is located above the clamping ring.

[0009] As a preferred technical solution of the present invention, the filtering component includes a collection box installed on the side of the filter cylinder. A communication port communicating with the inner cavity of the collection box is formed on the side of the filter cylinder, and a filter screen is installed in the communication port. The communicating pipe is installed on the side of the collection box and communicates with the inner cavity of the collection box. A one-way valve is installed on the communicating pipe. The solid conveying component includes a motor group installed outside the filter cylinder. An installation shaft located in the filter cylinder is installed on the output shaft of the motor group, and a spiral blade is installed on the installation shaft. A bracket for positioning the filter cylinder is installed on the side of the treatment tank.

[0010] As a preferred technical solution of the present invention, a guide rod is rotatably installed at the end of the installation shaft. The extrusion assembly includes a positioning plate slidably arranged on the guide rod. A circular plate is fixed at the end of the guide rod. A spring is sleeved outside the guide rod, and the spring is located between the positioning plate and the circular plate.

[0011] As a preferred technical solution of the present invention, a partition plate is fixed in the treatment box, and the partition plate divides the inner cavity of the treatment box into a reaction cavity and a treatment cavity. The aeration assembly is located in the reaction cavity, and several groups of membrane reactors are located in the treatment cavity. A water inlet pipe communicating with the inner cavities of several groups of membrane reactors is installed at the lower part of the side of the partition plate. A water outlet pipe communicating with the inner cavities of several groups of membrane reactors is installed at the upper part of the side of the treatment box. A drainage pipe is arranged between adjacent two membrane reactors. A water purification pipe communicating with the inner cavities of several drainage pipes is installed on the side of the treatment box.

[0012] As a preferred technical solution of the present invention, the aeration assembly includes an aeration pipe installed at the lower part of the side of the treatment box. Several air spray nozzles communicating with the inner cavity of the aeration pipe are installed on the side of the aeration pipe, and several air spray nozzles are all located in the reaction cavity. A temperature sensor is installed on the side of the aeration pipe, and the detection end of the temperature sensor is located in the aeration pipe. A temperature control box is installed outside the aeration pipe. An electric heating group is installed on the side of the temperature control box, and the heating end of the electric heating group is in contact with the side of the aeration pipe. The temperature sensor and the temperature control box are both located outside the treatment box.

[0013] As a preferred technical solution of the present invention, the cleaning assembly includes an installation frame slidably arranged at the top of the treatment cavity. Several installation frames are fixed on the side of the installation frame, and the installation frames are arranged in a staggered manner with the membrane reactors. Several cleaning strips are fixed on the side of the installation frame.

[0014] As a preferred technical solution of the present invention, installation boxes are installed on both sides of the treatment box. An air blowing port communicating with the inner cavity of the treatment box is opened on the side of the installation box, and the air blowing port is correspondingly arranged in the middle of the side of the installation frame. A piston is slidably arranged in the installation box. A push rod is fixed on the side of the piston, and the push rod extends into the treatment cavity through the air blowing port. An elastic member is arranged on the side of the piston away from the air blowing port and is located in the installation box. A limiting plate for limiting the piston is arranged in the installation box. An exhaust pipe communicating with the top of the reaction cavity is installed on the side of the treatment box. A pressure relief valve is installed on the exhaust pipe. One end of the exhaust pipe away from the reaction cavity is communicated with the inner cavity of the installation box. First magnetic components are installed at positions close to the installation frame on both sides of the treatment box. Second magnetic components are installed at positions corresponding to the first magnetic components on the side of the installation frame. The first magnetic components and the second magnetic components adsorb each other.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The purification membrane system for high-altitude aquaculture sewage treatment in the example of the present invention injects the sewage generated during the aquaculture process into the anaerobic fermentation tank through the dirt injection pipe. When it is sunny, sunlight enters the anaerobic fermentation tank through the transparent plate, increasing the temperature inside the anaerobic fermentation tank and facilitating the reproduction of anaerobic microorganisms. The anaerobic microorganisms decompose the organic matter in the sewage to form biogas, which can be used for heating or power generation in the farm. When it is dark or cloudy, a heat-insulating layer, such as a straw mat or heat-insulating cotton, is laid on the protective cover to reduce the overflow of the temperature inside the anaerobic fermentation tank and prevent the anaerobic microorganisms from losing their activity and being unable to decompose the organic matter due to the low temperature in the high-altitude area.

[0017] 2. The purification membrane system for high-altitude aquaculture sewage treatment in the example of the present invention, during the process of pumping sewage through the pipeline, solid pollutants such as livestock and poultry excrement, feed or grass residue accumulated at the bottom of the inner cavity of the anaerobic fermentation tank enter the pipeline along with the sewage. If the solid pollutants accumulate and block in the moving pipe, resulting in a decrease in the sewage pumping capacity of the moving pipe, affected by the suction force of the pump group on the side of the collection box, the moving pipe moves in the extraction pipe. During the relative movement of the extraction pipe and the moving pipe, the positioning rod installed in the extraction pipe exerts a force on the pollutants accumulated in the moving pipe through the cone installed at its end, facilitating the dredging of the moving pipe and preventing the solid pollutants from accumulating and blocking in the relatively thin moving pipe, ensuring the effective extraction of sewage by the moving pipe.

[0018] 3. The purification membrane system for high-altitude aquaculture sewage treatment in the example of the present invention, the multiple protective frames provided are used for filtering the sewage in the dirt. The sewage seeps down through the protective net into the protective frame, while the protective net filters and blocks the larger solid pollutants, reducing the content of solid pollutants in the extracted sewage. The sewage in the multiple protective frames flows through the diversion pipe, facilitating the extraction of the sewage in the anaerobic fermentation tank through the pipeline.

[0019] 4. The purification membrane system for high-altitude aquaculture sewage treatment in the example of the present invention, after connecting the aeration pipe to the external pump body, the external pump body is controlled to work so that the aeration pipe aerates the reaction cavity through the air nozzles. When the aeration pipe is in use, the temperature sensor monitors the temperature of the gas in the aeration pipe. When the temperature is low, the electric heating group on the temperature control box works to heat the aeration pipe, increasing the temperature of the gas in the aeration pipe and avoiding the influence of the low gas temperature on the microorganisms in the reaction cavity.

[0020] 5. The purification membrane system for high-altitude aquaculture sewage treatment in the example of the present invention, the airflow pushes the installation frame to move back and forth on both sides of the treatment box. During the movement of the installation frame, the cleaning strip provided on the installation rack cleans the membrane reactor, avoiding the blockage of the membrane reactor by solid pollutants in the sewage and affecting the sewage treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the present invention;

[0022] Figure 2 It is a schematic structural diagram of the anaerobic fermentation tank in the present invention;

[0023] Figure 3 It is a schematic cross-sectional structural diagram of the extraction pipe in the present invention;

[0024] Figure 4 is Figure 3 an enlarged structural diagram of part A in

[0025] Figure 5 It is a schematic structural diagram of the filter cylinder and the treatment tank in the present invention;

[0026] Figure 6 It is a schematic cross-sectional structural diagram of the filter cylinder in the present invention;

[0027] Figure 7 is Figure 6 an enlarged structural diagram of part B in

[0028] Figure 8 is Figure 6 a schematic structural diagram after removing the conveying component;

[0029] Figure 9 It is a schematic cross-sectional structural diagram of the side of the treatment tank in the present invention;

[0030] Figure 10 It is a schematic cross-sectional structural diagram of the top of the treatment tank in the present invention;

[0031] Figure 11 It is a schematic structural diagram of another perspective of the treatment tank in the present invention;

[0032] Figure 12 is Figure 11 an enlarged structural diagram of part C in

[0033] Figure 13 It is a schematic structural diagram of the treatment tank after removing the cleaning component;

[0034] Figure 14 It is a schematic structural diagram of the cleaning component in the present invention.

[0035] In the figure: 1 anaerobic fermentation tank, 11 dirt injection pipe, 12 positioning frame, 13 transparent plate, 14 protective frame, 15 protective net, 16 diversion pipe, 17 chute, 18 water delivery pipe, 2 collection tank, 21 pump set, 22 extraction pipe, 23 moving pipe, 24 positioning rod, 25 cone, 26 snap ring, 27 downflow pipe, 3 filter cartridge, 31 mounting shaft, 32 spiral blade, 33 motor set, 34 collection box, 35 filter screen, 36 connecting pipe, 37 check valve, 38 support, 4 guide rod, 41 positioning plate, 42 round plate, 43 spring, 5 treatment tank, 51 partition, 52 membrane reactor, 53 water inlet pipe, 54 water outlet pipe, 55 drainage pipe, 56 purified water pipe, 57 first magnetic assembly, 6 aeration pipe, 61 air nozzle, 62 temperature sensor, 63 temperature control box, 64 electric heating set, 7 mounting frame, 71 mounting bracket, 72 cleaning strip, 73 second magnetic assembly, 8 exhaust pipe, 81 pressure relief valve, 82 mounting box, 83 piston, 84 push rod, 85 elastic member. Detailed implementation manner

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0037] Please refer to Figures 1-14 , the present invention provides a technical solution: a purification membrane system for high-altitude aquaculture sewage treatment, including an anaerobic fermentation tank 1, a collection tank 2, a filter cartridge 3 and a treatment tank 5. The top of the anaerobic fermentation tank 1 is open, and a transparent protective cover is provided on the top of the anaerobic fermentation tank 1. The protective cover includes a positioning frame 12, and a plurality of transparent plates 13 are installed in the positioning frame 12. The transparent plates 13 are preferably glass plates. A dirt injection pipe 11 communicating with its inner cavity is installed on the side of the anaerobic fermentation tank 1. Through the dirt injection pipe 11, the sewage generated during the aquaculture process is injected into the anaerobic fermentation tank 1. When it is sunny, sunlight enters the anaerobic fermentation tank 1 through the transparent plates 13, increasing the temperature inside the anaerobic fermentation tank 1 and facilitating the reproduction of anaerobic microorganisms. The anaerobic microorganisms decompose the organic matter in the sewage to form biogas, which can be used for heating or power generation in the farm. When it is dark or cloudy, a heat preservation layer, such as a straw mat or heat preservation cotton, is laid on the protective cover to reduce the overflow of the temperature inside the anaerobic fermentation tank 1 and prevent the anaerobic microorganisms from losing their activity and being unable to decompose the organic matter due to the low temperature in high-altitude areas.

[0038] An annular chute 17 is provided at the upper inner side of the anaerobic fermentation tank 1. A water delivery pipe 18 is installed on the side of the anaerobic fermentation tank 1 and communicates with the bottom of the inner cavity of the chute 17. The other end of the water delivery pipe 18 is fixed on the side of the collection tank 2 and communicates with the inner cavity of the collection tank 2. Affected by light and the decomposition of organic matter by microorganisms, the temperature in the anaerobic fermentation tank 1 rises, causing some water molecules in the sewage to volatilize and condense on the protective cover. The protective cover is in an inverted conical structure, which facilitates the accumulation and downward flow of the condensed water. The provided chute 17 is used for the collection of accumulated water flow, and the water flow collected in the chute 17 flows into the collection tank 2 through the water delivery pipe 18. This process can assist in the treatment of the sewage in the anaerobic fermentation tank 1.

[0039] A pipe communicating with the bottom of the inner cavity of the anaerobic fermentation tank 1 is provided on the side of the collection tank 2, and a pump set 21 communicating with its inner cavity is installed on the side of the collection tank 2. By controlling the operation of the pump set 21, the pump set 21 can be used to extract the gas in the collection tank 2, reducing the pressure in the collection tank 2, which is convenient for the collection tank 2 to extract the sewage in the anaerobic fermentation tank 1 through the pipe.

[0040] The pipe includes an extraction pipe 22. The extraction pipe 22 is installed on the collection tank 2 and communicates with the upper part of the inner cavity of the collection tank 2 to prevent the sewage pumped into the collection tank 2 from flowing back. The part of the extraction pipe 22 located in the anaerobic fermentation tank 1 is arranged vertically. A moving pipe 23 is slidably arranged in the extraction pipe 22. The bottom end of the moving pipe 23 is located at the bottom of the inner cavity of the anaerobic fermentation tank 1 and is used to extract the sewage in the anaerobic fermentation tank 1. A positioning rod 24 is fixed in the extraction pipe 22, and a cone 25 located in the moving pipe 23 is fixed at the bottom of the positioning rod 24. During the process of extracting sewage through the pipe, solid pollutants such as livestock and poultry excrement, feed or grass residue accumulated at the bottom of the inner cavity of the anaerobic fermentation tank 1 enter the pipe along with the sewage. If the solid pollutants accumulate and block in the moving pipe 23, resulting in a decrease in the sewage extraction capacity of the moving pipe 23, affected by the suction force of the pump set 21 on the side of the collection tank 2, the moving pipe 23 moves in the extraction pipe 22. During the relative movement of the extraction pipe 22 and the moving pipe 23, the positioning rod 24 installed in the extraction pipe 22 exerts a force on the pollutants accumulated in the moving pipe 23 through the cone 25 installed at its end, facilitating the dredging of the moving pipe 23, preventing the solid pollutants from accumulating and blocking in the relatively thin moving pipe 23, and ensuring the effective extraction of sewage by the moving pipe 23.

[0041] A snap ring 26 is fixed inside the anaerobic fermentation tank 1, and the snap ring 26 is sleeved outside the moving pipe 23. A protrusion is provided in the middle of the side of the moving pipe 23, and the protrusion is located above the snap ring 26. The snap ring 26 is used for positioning the moving pipe 23. When the moving pipe 23 is blocked and moves upward under the suction force, the snap ring 26 limits and guides the movement of the moving pipe 23 to improve the stability of the moving pipe 23 during movement; after the cone 25 dredges the blockage in the moving pipe 23, the moving pipe 23 no longer is affected by the suction force and automatically falls. The snap ring 26 restricts the protrusion of the moving pipe 23 to prevent the moving pipe 23 from dropping from the extraction pipe 22 due to excessive downward movement, and at the same time prevent the bottom end of the moving pipe 23 from fitting against the bottom of the anaerobic fermentation tank 1 and being unable to effectively extract sewage.

[0042] Several protective frames 14 are provided at the inner edge of the anaerobic fermentation tank 1. An installation opening is provided on the side of the protective frame 14, and a protective net 15 is installed in the installation opening. A diversion pipe 16 communicating with the bottom of its inner cavity is provided between adjacent two protective frames 14. The pipe is located in one of the protective frames 14. The multiple protective frames 14 provided are used for filtering sewage in the dirt. The sewage seeps downward through the protective net 15 into the protective frame 14, while the protective net 15 filters and blocks larger solid pollutants, reducing the content of solid pollutants in the extracted sewage. The sewage in the multiple protective frames 14 flows through the diversion pipe 16, facilitating the extraction of the sewage in the anaerobic fermentation tank 1 through the pipe.

[0043] A downstream pipe 27 communicating with the inner cavity of the filter cylinder 3 is installed at the lower part of the side of the collection box 2. When the collection box 2 extracts the sewage in the anaerobic fermentation tank 1, part of the sewage flows into the filter cylinder 3 through the downstream pipe 27. When the sewage in the collection box 2 is extracted to a certain amount, the pump group 21 can be closed to make the sewage in the collection box 2 flow automatically downward into the filter cylinder 3 under gravity, facilitating the secondary filtration treatment of the sewage.

[0044] The filter cylinder 3 is inclined, and the top end of the filter cylinder 3 is open. A solid conveying component is arranged inside the filter cylinder 3, an extrusion component is arranged at the open part of the filter cylinder 3, and a filtering component is arranged at the lower part of the side of the filter cylinder 3. A communicating pipe 36 communicating with the inner cavity of the treatment box 5 is arranged on the side of the filtering component. After the sewage enters the filter cylinder 3, the filtering component filters the solid pollutants in the sewage, and the filtered solid pollutants are conveyed obliquely upward by the solid conveying component. After being conveyed to the position of the extrusion component, the extrusion component extrudes the sewage in the solid pollutants. A bracket 38 for positioning the filter cylinder 3 is installed on the side of the treatment box 5. The filter cylinder 3 is positioned and supported by the bracket 38 installed on the side of the treatment box 5, facilitating the installation and use of the filter cylinder 3.

[0045] The filtration component includes a collection box 34 installed on the side of the filter cylinder 3. A communication port communicating with the inner cavity of the collection box 34 is provided on the side of the filter cylinder 3. A filter screen 35 is installed in the communication port. After the sewage flows into the filter cylinder 3 through the downstream pipe 27, the filter screen 35 filters the solid pollutants in the sewage. The filtered sewage enters the collection box 34 through the filter screen 35. A communication pipe 36 is installed on the side of the collection box 34 and communicates with the inner cavity of the collection box 34. A one-way valve 37 is installed on the communication pipe 36. The sewage in the collection box 34 enters the treatment tank 5 through the communication pipe 36, and the one-way valve 37 prevents the sewage in the communication pipe 36 from flowing back.

[0046] The solid conveying component includes a motor set 33 installed outside the filter cylinder 3. A mounting shaft 31 located inside the filter cylinder 3 is installed on the output shaft of the motor set 33, and a spiral blade 32 is installed on the mounting shaft 31. By controlling the operation of the motor set 33, the motor set 33 drives the mounting shaft 31 to make the spiral blade 32 rotate, and the spiral blade 32 pushes the solid pollutants filtered out at the filter screen 35 to move obliquely upward.

[0047] The end of the mounting shaft 31 is rotatably installed with a guide rod 4 through a sleeve. The guide rod 4 is not affected by the rotation speed of the motor set 33, which is convenient for the use of the extrusion component. The extrusion component includes a positioning plate 41 slidably arranged on the guide rod 4. A circular plate 42 is fixed at the end of the guide rod 4. A spring 43 is sleeved outside the guide rod 4, and the spring 43 is located between the positioning plate 41 and the circular plate 42. The position of the positioning plate 41 is positioned by the elastic action of the spring 43. As the solid pollutants accumulate at the upper end of the filter cylinder 3, the spiral blade 32 and the positioning plate 41 squeeze the sewage in the solid pollutants. The squeezed sewage flows downward along the inclined filter cylinder 3 into the collection box 34. The dehydrated and dried pollutants apply a force to the positioning plate 41 under the action of the spiral blade 32. After this force is greater than the elastic supporting force of the spring 43, the positioning plate 41 squeezes the spring 43 to deform and moves along the guide rod 4, which is convenient for the dehydrated solid pollutants to be discharged from the filter cylinder 3 for unified treatment.

[0048] An aeration component and several groups of membrane reactors 52 are arranged in the treatment tank 5. And a cleaning component is arranged at a position close to the membrane reactor 52 on the inner side of the treatment tank 5. A partition plate 51 is fixed in the treatment tank 5, and the partition plate 51 divides the inner cavity of the treatment tank 5 into a reaction chamber and a treatment chamber. The aeration component is located in the reaction chamber, and several groups of membrane reactors 52 are located in the treatment chamber. A water inlet pipe 53 communicating with the inner cavities of several groups of membrane reactors 52 is installed at the lower part of the side of the partition plate 51. A water outlet pipe 54 communicating with the inner cavities of several groups of membrane reactors 52 is installed at the upper part of the side of the treatment tank 5. A drainage pipe 55 is arranged between two adjacent membrane reactors 52. A water purification pipe 56 communicating with the inner cavities of several drainage pipes 55 is installed on the side of the treatment tank 5.

[0049] After the sewage flows into the reaction chamber, under the oxygen supply condition of the aeration component, aerobic microorganisms use oxygen to decompose the organic matter in the sewage into harmless substances such as carbon dioxide and water. At the same time, nitrifying bacteria are used to remove ammonia nitrogen in the sewage, and polyphosphorus microorganisms are used to excessively absorb phosphorus in the aerobic environment and store it in the cells in the form of polyphosphate to achieve the effect of phosphorus removal. After the sewage is acted on by the aerobic bacterial group, it enters the membrane reactor 52 through the water inlet pipe 53, and the sewage is filtered in the way of lower water inlet and upper water outlet. The filtered purified water is discharged through the membrane reactor 52 and accumulates in the treatment chamber, and the purified water is drained into the purified water pipe 56 through the drain pipe 55 and can be used for green plant irrigation, etc. After the sewage is filtered by the membrane reactor 52, it is discharged through the water outlet pipe 54 and can be drained into the anaerobic fermentation tank 1 for re - filtration. It should be noted that a solenoid valve is installed at one end of the water inlet pipe 53 close to the partition plate 51, and by controlling the solenoid valve switch, it is convenient to control the water inflow and water inlet time in the membrane reactor 52.

[0050] The aeration component includes an air - distributing pipe 6 installed at the lower part of the side of the treatment tank 5. A number of air nozzles 61 communicating with its inner cavity are installed on the side of the air - distributing pipe 6, and all the air nozzles 61 are located in the reaction chamber. After connecting the air - distributing pipe 6 with an external pump body, by controlling the operation of the external pump body, the air - distributing pipe 6 aerates the reaction chamber through the air nozzles 61. Because the oxygen concentration in high - altitude areas is relatively low, an oxygen tank can be set to assist in aeration to facilitate the treatment of sewage by aerobic microorganisms.

[0051] A temperature sensor 62 is installed on the side of the air - distributing pipe 6, and the detection end of the temperature sensor 62 is located inside the air - distributing pipe 6. A temperature control box 63 is installed outside the air - distributing pipe 6. An electric heating group 64 is installed on the side of the temperature control box 63, and the heating end of the electric heating group 64 is in contact with the side of the air - distributing pipe 6. Both the temperature sensor 62 and the temperature control box 63 are located outside the treatment tank 5. When the air - distributing pipe 6 is in use, the temperature sensor 62 monitors the gas temperature inside the air - distributing pipe 6. When the temperature is relatively low, the electric heating group 64 on the temperature control box 63 works to heat the air - distributing pipe 6 to increase the gas temperature inside the air - distributing pipe 6 and avoid the influence of low gas temperature on the microorganisms in the reaction chamber.

[0052] The cleaning component includes a mounting frame 7 slidably arranged on the top of the treatment chamber. A number of mounting brackets 71 are fixed on the side of the mounting frame 7, and the mounting brackets 71 are arranged in an interleaved manner with the membrane reactor 52. A number of cleaning strips 72 are fixed on the side of the mounting brackets 71. By controlling the mounting frame 7 to move repeatedly on the top of the treatment chamber, the cleaning strips 72 installed on the mounting brackets 71 clean the membrane reactor 52 to prevent solid pollutants in the sewage from blocking the membrane reactor 52 and affecting the sewage treatment efficiency. Before the membrane reactor 52 filters the aquaculture sewage, the protective net 15 and the filter screen 35 arranged first play a filtering role to extend the service life of the membrane reactor 52.

[0053] Installation boxes 82 are installed on both sides of the treatment tank 5. An air outlet communicating with the inner cavity of the treatment tank 5 is provided on the side of the installation box 82, and the air outlet is correspondingly arranged in the middle of the side of the installation frame 7. A piston 83 is slidably arranged in the installation box 82. A push rod 84 is fixed to the side of the piston 83. The push rod 84 extends into the treatment cavity through the air outlet. An elastic member 85 is arranged on the side of the piston 83 away from the air outlet and is located in the installation box 82. A limiting plate for limiting the piston 83 is arranged in the installation box 82. The limiting plate prevents the elastic member 85 from pushing the piston 83 out of the installation box 82. An exhaust pipe 8 communicating with the top of the reaction cavity is installed on the side of the treatment tank 5. A pressure relief valve 81 is installed on the exhaust pipe 8. One end of the exhaust pipe 8 away from the reaction cavity communicates with the inner cavity of the installation box 82. First magnetic components 57 are installed at positions on both sides of the treatment tank 5 close to the installation frame 7. Second magnetic components 73 are installed at positions on the side of the installation frame 7 corresponding to the first magnetic components 57. The first magnetic components 57 and the second magnetic components 73 attract each other.

[0054] During use, first move the installation frame 7 to one side of the treatment tank 5. During the movement, the first magnetic component 57 on this side attracts the second magnetic component 73, so that the installation frame 7 is effectively attached to this side of the treatment tank 5. After the installation frame 7 is attached to this side of the treatment tank 5, the installation frame 7 drives the piston 83 to move in the installation box 82 through the push rod 84, so that the piston 83 moves to the rear of the connection between the exhaust pipe 8 and the installation box 82. The installation box 82 on this side is in communication with the exhaust pipe 8. The use of the aeration component and the decomposition of organic matter by aerobic microorganisms to produce carbon dioxide will cause the pressure in the reaction cavity to increase. When the pressure reaches a certain value, the pressure blows open the pressure relief valve 81 and conveys air flow along the exhaust pipe 8 to the installation box 82. The air flow entering the installation box 82 is ejected through the air outlet. The ejected air flow pushes the installation frame 7 to move and separate from this side of the treatment tank 5, and the installation frame 7 moves towards the other side of the treatment tank 5 under the action of the air flow. When the second magnetic component 73 on the side of the installation frame 7 approaches the first magnetic component 57 on the other side of the treatment tank 5, the first magnetic component 57 attracts the second magnetic component 73 to make the installation frame 7 fit with the other side of the treatment tank 5. After the installation frame 7 moves away from this side of the treatment tank 5, the elastic member 85 pushes the piston 83 to move to block the connection between the installation box 82 and the exhaust pipe 8. The next time the exhaust pipe 8 exhausts, the air flow can only be discharged through the installation box 82 on the other side, which is convenient for the installation frame 7 to move back and forth on both sides of the treatment tank 5 through the air flow. During the movement of the installation frame 7, the cleaning strip 72 arranged on the installation rack 71 cleans the membrane reactor 52, which is convenient for the use of the cleaning component.

[0055] The pump set 21, motor set 33, temperature sensor 62, electric heating set 64, etc. used in the present invention are all common electronic components in the prior art. Their working modes and circuit structures are well-known technologies. The working of these electronic components such as the pump set 21, motor set 33, temperature sensor 62, electric heating set 64, etc. is controlled by setting a switch group or a PLC controller, which is a common technical solution for technicians and will not be elaborated here. It should be noted that each group of structures in the present invention is processed and prepared with heat-insulating materials or wrapped with a heat-insulating layer on the structures in contact with the external environment to ensure the activity of various microorganisms.

[0056] The present invention filters the aquaculture sewage multiple times to reduce the contents of solid excreta, feed residues, animal hairs, etc. in the sewage, thereby extending the single-use cycle of the membrane reactor, reducing the frequency of its cleaning or replacement, improving the sewage treatment efficiency. In addition, the temperature in this purification membrane system is controllable, which is conducive to the survival and reproduction of anaerobic microorganisms and aerobic microorganisms, facilitating the treatment of nutrients such as organic matter, nitrogen, and phosphorus in the sewage, and improving the quality of aquaculture sewage treatment.

[0057] The parts not disclosed in the present invention are all prior art, and their specific structures, materials and working principles will not be elaborated. Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A purification membrane system for high-altitude aquaculture sewage treatment, comprising an anaerobic fermentation tank (1), a collection tank (2), a filter cylinder (3) and a treatment tank (5), characterized in that: The top of the anaerobic fermentation tank (1) is open, and a transparent protective cover is provided on the top of the anaerobic fermentation tank (1). A pipeline communicating with the bottom of the inner cavity of the anaerobic fermentation tank (1) is provided on the side of the collection box (2), and a pump set (21) communicating with the inner cavity of the collection box (2) is installed on the side of the collection box (2). A downstream pipe (27) communicating with the inner cavity of the filter cylinder (3) is installed at the lower part of the side of the collection box (2). The filter cylinder (3) is inclined, and the top of the filter cylinder (3) is open. A solid conveying component is arranged in the filter cylinder (3). An extrusion component is arranged at the open part of the filter cylinder (3). A filtering component is arranged at the lower part of the side of the filter cylinder (3), and a communicating pipe (36) communicating with the inner cavity of the treatment box (5) is arranged on the side of the filtering component. An aeration component and a plurality of groups of membrane reactors (52) are arranged in the treatment box (5), and a cleaning component is arranged at a position close to the membrane reactor (52) on the inner side of the treatment box (5).

2. The purification membrane system for high-altitude aquaculture sewage treatment according to claim 1, wherein: A dirt injection pipe (11) communicating with the inner cavity of the anaerobic fermentation tank (1) is installed on the side of the anaerobic fermentation tank (1). The protective cover includes a positioning frame (12), and a plurality of transparent plates (13) are installed in the positioning frame (12). An annular chute (17) is arranged at the upper part of the inner side of the anaerobic fermentation tank (1). A water delivery pipe (18) communicating with the bottom of the inner cavity of the chute (17) is installed on the side of the anaerobic fermentation tank (1). The other end of the water delivery pipe (18) is fixed on the side of the collection box (2) and communicates with the inner cavity of the collection box (2).

3. The purification membrane system for high-altitude aquaculture sewage treatment according to claim 1, characterized in that: A plurality of protective frames (14) are arranged at the inner edge of the anaerobic fermentation tank (1). An installation opening is formed on the side of the protective frame (14), and a protective net (15) is installed in the installation opening. A diversion pipe (16) communicating with the bottom of the inner cavity is arranged between two adjacent protective frames (14). The pipeline is located in one of the protective frames (14).

4. The purification membrane system for high-altitude aquaculture sewage treatment according to claim 1, characterized in that: The pipeline includes a extraction pipe (22), and the part of the extraction pipe (22) located in the anaerobic fermentation tank (1) is arranged vertically. A moving pipe (23) is slidably arranged in the extraction pipe (22). A positioning rod (24) is fixed in the extraction pipe (22), and a cone (25) located in the moving pipe (23) is fixed at the bottom of the positioning rod (24). A clamping ring (26) is fixed in the anaerobic fermentation tank (1), and the clamping ring (26) is sleeved outside the moving pipe (23). A protrusion is arranged in the middle of the side of the moving pipe (23), and the protrusion is located above the clamping ring (26).

5. The purification membrane system for high-altitude aquaculture sewage treatment according to claim 1, characterized in that: The filtering component includes a collection box (34) installed on the side of the filter cylinder (3). A communication port communicating with the inner cavity of the collection box (34) is formed on the side of the filter cylinder (3). A filter screen (35) is installed in the communication port. A communication pipe (36) is installed on the side of the collection box (34) and communicates with the inner cavity of the collection box (34). A one-way valve (37) is installed on the communication pipe (36). The solid conveying component includes a motor group (33) installed outside the filter cylinder (3). A mounting shaft (31) located inside the filter cylinder (3) is installed on the output shaft of the motor group (33), and a spiral blade (32) is installed on the mounting shaft (31). A bracket (38) for positioning the filter cylinder (3) is installed on the side of the processing box (5).

6. The purification membrane system for high-altitude aquaculture sewage treatment according to claim 5, wherein: A guide rod (4) is rotatably installed at the end of the mounting shaft (31). The pressing component includes a positioning plate (41) slidably arranged on the guide rod (4). A circular plate (42) is fixed at the end of the guide rod (4). A spring (43) is sleeved outside the guide rod (4), and the spring (43) is located between the positioning plate (41) and the circular plate (42).

7. The purification membrane system for high-altitude aquaculture sewage treatment according to claim 1, wherein: A partition plate (51) is fixed inside the processing box (5), and the partition plate (51) divides the inner cavity of the processing box (5) into a reaction chamber and a processing chamber. The aeration component is located in the reaction chamber, and several groups of membrane reactors (52) are located in the processing chamber. A water inlet pipe (53) communicating with the inner cavities of several groups of membrane reactors (52) is installed at the lower part of the side of the partition plate (51). A water outlet pipe (54) communicating with the inner cavities of several groups of membrane reactors (52) is installed at the upper part of the side of the processing box (5). A drainage pipe (55) is arranged between adjacent two membrane reactors (52). A water purification pipe (56) communicating with the inner cavities of several drainage pipes (55) is installed on the side of the processing box (5).

8. The purification membrane system for high-altitude aquaculture sewage treatment according to claim 7, wherein: The aeration component includes an aeration pipe (6) installed at the lower part of the side of the processing box (5). Several air spray nozzles (61) communicating with the inner cavity of the aeration pipe (6) are installed on the side of the aeration pipe (6), and several air spray nozzles (61) are all located in the reaction chamber. A temperature sensor (62) is installed on the side of the aeration pipe (6), and the detection end of the temperature sensor (62) is located inside the aeration pipe (6). A temperature control box (63) is installed outside the aeration pipe (6). An electric heating group (64) is installed on the side of the temperature control box (63), and the heating end of the electric heating group (64) is in contact with the side of the aeration pipe (6). The temperature sensor (62) and the temperature control box (63) are both located outside the processing box (5).

9. The purification membrane system for high-altitude aquaculture sewage treatment according to claim 7, characterized in that: The cleaning component includes a mounting frame (7) slidably arranged at the top of the processing chamber. Several mounting brackets (71) are fixed on the side of the mounting frame (7), and the mounting brackets (71) are arranged in a staggered manner with the membrane reactors (52). Several cleaning strips (72) are fixed on the side of the mounting brackets (71).

10. The purification membrane system for high-altitude aquaculture sewage treatment according to claim 9, characterized in that: On both sides of the processing box (5), mounting boxes (82) are installed. An air blowing port communicating with the inner cavity of the processing box (5) is formed on the side surface of the mounting box (82), and the air blowing port is correspondingly arranged in the middle of the side surface of the mounting frame (7). A piston (83) is slidably arranged in the mounting box (82). A push rod (84) is fixed to the side surface of the piston (83). The push rod (84) extends into the processing cavity through the air blowing port. An elastic member (85) located in the mounting box (82) is arranged on the side of the piston (83) away from the air blowing port. A limiting plate for limiting the piston (83) is arranged in the mounting box (82). An exhaust pipe (8) communicating with the top of the reaction cavity is installed on the side surface of the processing box (5). A pressure relief valve (81) is installed on the exhaust pipe (8). One end of the exhaust pipe (8) away from the reaction cavity communicates with the inner cavity of the mounting box (82). First magnetic components (57) are installed at positions close to the mounting frame (7) on both sides of the processing box (5). Second magnetic components (73) are installed at positions on the side surface of the mounting frame (7) corresponding to the first magnetic components (57). The first magnetic components (57) and the second magnetic components (73) adsorb each other.

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