MBR integrated underground sewage treatment equipment

Abstract

The present application relates to sewage treatment field, it discloses a kind of MBR integrated underground sewage treatment equipment, including processing jar, processing jar inner cavity is divided into the installation area and clear water area not interconnected, installation area is provided with adjusting pool, anoxic tank, aerobic tank, reaction tank and sludge tank, reaction tank is provided with membrane module, membrane module includes membrane unit and cleaning component, cleaning component includes cross bar, cross bar is provided with several and there is a membrane unit between adjacent two cross bars, several cross bars are connected by vertical rod, the inside of cross bar and vertical rod is hollow, the upper surface of vertical rod is provided with connecting rod, the inside of connecting rod is hollow, the upper end of connecting rod is provided with support, support is displaced along vertical direction by linear module, the side of cross bar towards membrane unit is provided with spray hole, spray hole is provided with multiple and adjacent two spray holes respectively upwardly inclined and downwardly inclined along the extension direction of cross bar.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment, specifically to an integrated MBR underground wastewater treatment system. Background Technology

[0002] MBR (Membrane Bioreactor) is a highly efficient wastewater treatment process that combines the traditional activated sludge process with advanced membrane separation technology. It replaces the secondary sedimentation tank in traditional processes with a membrane module, achieving sludge-water separation. MBR can be understood as an upgraded version of traditional biological treatment; its core lies in replacing the gravity-based sedimentation tank with a sophisticated membrane layer, thus achieving more thorough and efficient solid-liquid separation.

[0003] In practical applications, MBRs can be broadly categorized into two types based on the placement of the membrane modules: separate and integrated. Integrated MBRs refer to membrane modules directly immersed in the bioreactor, with water extracted via negative pressure; this is currently the mainstream approach. Specifically, existing integrated MBR technology includes six tanks, in the following order: equalization tank, anoxic tank, aerobic tank, membrane bioreactor tank, sludge tank, and clear water tank.

[0004] Equalization tank: The first "buffer warehouse" for sewage. Its core function is to equalize the quality and quantity, that is, to balance the fluctuations in water quality and regulate changes in water volume at different times. At the same time, it removes some sand and suspended solids through preliminary sedimentation, thus ensuring the stable operation of the subsequent biological system.

[0005] Anoxic tank: The main place for denitrification and nitrogen removal. Wastewater is in an oxygen-deficient state here. Nitrates in the return mixed liquor are reduced to nitrogen gas and released into the air by denitrifying bacteria, thus efficiently removing total nitrogen from wastewater.

[0006] Aerobic tank: It undertakes the functions of organic matter degradation and nitrification, and rapidly decomposes organic pollutants in wastewater through aerobic microorganisms;

[0007] Membrane bioreactor: This is the core unit of the MBR process. The membrane modules submerged in the tank directly extract water, achieving efficient mud-water separation.

[0008] Clear water tank: Temporarily stores qualified water produced by the membrane tank;

[0009] Sludge tank: Used for temporary storage and preliminary thickening of excess sludge and cleaning wastewater generated by the system.

[0010] As can be seen from the above, although integrated MBR has relatively low energy consumption and good wastewater treatment effect, it has the problem of inconvenient cleaning after membrane fouling. Since the membrane module is the core unit of the whole equipment, its condition is an important factor affecting the sludge-water separation. It is very necessary to clean the membrane module regularly and effectively to ensure that the membrane module has good filtration performance.

[0011] Therefore, based on the regular and efficient cleaning of the membrane modules of an integrated MBR, this invention proposes an integrated underground sewage treatment device for MBR. Summary of the Invention

[0012] To address the problems mentioned in the background above, the present invention provides an integrated MBR underground sewage treatment device.

[0013] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows.

[0014] An integrated MBR buried sewage treatment equipment includes a treatment tank. A partition installed inside the treatment tank divides the inner cavity of the treatment tank into an installation area and a clear water area that are not interconnected. The installation area is equipped with five pools, namely an equalization pool, an anoxic pool, an aerobic pool, a reaction pool and a sludge pool. The reaction pool is equipped with a membrane module, which includes a membrane unit and a cleaning component.

[0015] The cleaning component includes a frame, which consists of crossbars and longitudinal bars. The crossbar array has several crossbars, and there is a membrane unit between each two adjacent crossbars. The crossbars are connected to each other by longitudinal bars.

[0016] The crossbars and longitudinal bars are hollow inside. A connecting rod is provided on the upper surface of the longitudinal bar. The connecting rod is hollow inside. A bracket is provided at the upper end of the connecting rod. The bracket is driven by the linear module to move in the vertical direction.

[0017] The crossbar has nozzles on the side facing the membrane unit. Multiple nozzles are arranged in an array along the extension direction of the crossbar, and in any two adjacent nozzles, one nozzle is inclined upwards and the other is inclined downwards.

[0018] Furthermore, the membrane unit includes a longitudinal duct and several PVDF hollow fiber membranes, with crossbars parallel to the longitudinal duct.

[0019] The ends of the PVDF hollow fiber membrane are connected to the longitudinal pipe, and several PVDF hollow fiber membranes are arrayed along the extension direction of the longitudinal pipe.

[0020] The longitudinal pipes of several membrane units are connected by horizontal pipes. A connecting shaft is provided on the upper surface of the horizontal pipe. The connecting shaft is hollow and communicates with the horizontal pipe. The upper end of the connecting shaft extends out of the reaction tank and is connected to the clear water zone through pump two.

[0021] Furthermore, the linear module includes a threaded shaft sleeved outside the connecting shaft. The lower end of the threaded shaft is connected to the bracket, and the upper end of the threaded shaft extends out of the reaction tank and is poweredly connected to a motor. The driven part of the power transmission component set between the motor and the threaded shaft is threaded outside the threaded shaft, and the driven part is restricted to rotation by a support set on the upper surface of the reaction tank.

[0022] The bracket and the vertically arranged guide rod form a sliding connection.

[0023] Furthermore, an air supply assembly is provided in the installation area of ​​the treatment tank. The air supply assembly includes an air storage tank. A compressor is connected to the air inlet of the air storage tank, and a pipe is provided at the air outlet with a valve six at the connection. A pipe four is provided outside the pipe one with a valve nine at the connection. The upper end of the connecting rod is connected to the pipe four.

[0024] Furthermore, the upper end of the connecting shaft is connected to pump two via water pipe one, and pipe one and water pipe one are connected via a connecting valve.

[0025] Furthermore, the end of pipe one is connected to pipe three, and valve eight is installed at the connection point. Pipe three is connected to the sludge tank.

[0026] Furthermore, pipe one is connected to pipe two at its end, and valve seven is installed at the connection point;

[0027] An agitator is installed inside the aerobic tank. The upper end of the agitator is connected to pipe two. Compressed air is input into the aerobic tank through pipe two and the agitator. Driven by the flow of compressed air, the agitator rotates.

[0028] Furthermore, the agitator includes an agitator shaft, which is a cylindrical shaft with an open top and a closed bottom, and the upper end extends out of the aerobic tank and is connected to the second pipe via a rotary joint. Several blades are arranged in an array along the circumferential direction on the outside of the agitator shaft. The blades are hollow inside and communicate with the inner cavity of the agitator shaft. The blades are arc-shaped.

[0029] Furthermore, among the remaining four pools excluding the sludge pool, adjacent pools are connected by a pump, and three pumps are installed accordingly.

[0030] The installation area also contains an exhaust pipe located above the pool and an auger conveyor located below the pool;

[0031] The exhaust pipe is connected to the tank via valve one, which has five valves. The exhaust end of the exhaust pipe extends out of the treatment tank.

[0032] The auger conveyor is connected to the four pools other than the sludge pool through four valves. The output end of the auger conveyor is connected to a sludge pipe and a valve is installed at the connection. The end of the sludge pipe is connected to the sludge pool. The bottom of the sludge pool is connected to a sewage pipe and a valve is installed at the connection. The end of the sewage pipe extends out of the treatment tank.

[0033] A sewage pipe is installed on the upper surface of the equalization tank, with the upper end of the sewage pipe extending out of the treatment tank;

[0034] The upper surface of the treatment tank is equipped with a clean water pipe that connects to the clean water zone and an air inlet pipe that connects to the installation zone. A valve is installed at the upper end of the clean water pipe.

[0035] Compared with the prior art, the beneficial effects of this invention are as follows:

[0036] In this case, while the crossbar reciprocates between the upper and lower ends of the PVDF hollow fiber membrane, compressed air flows into the crossbar through pipe one, pipe four, connecting rod, and longitudinal rod, and is sprayed onto the PVDF hollow fiber membrane through nozzles. Simultaneously, compressed air also flows into the PVDF hollow fiber membrane through pipe one, water pipe one, connecting shaft, crossbar, and longitudinal pipe, achieving backflushing of the PVDF hollow fiber membrane. In other words, the cleaning of the PVDF hollow fiber membrane is achieved through the coordination of reciprocating movement, airflow ejection, and airflow backflushing. Its technical advantages are:

[0037] Since one of the two adjacent nozzles is tilted upwards and the other is tilted downwards, the airflow ejected through the two adjacent nozzles is also tilted upwards and downwards. The coordination between the tilted airflow and the reciprocating motion can achieve the initial air flushing of the PVDF hollow fiber membrane.

[0038] Meanwhile, the point where the airflow contacts the PVDF hollow fiber membrane is named the landing point. With the upward and downward tilting airflows working together, the portion of the PVDF hollow fiber membrane located between the two landing points experiences an upward and downward pulling effect. In other words, the fiber pores of the PVDF hollow fiber membrane located between the two landing points undergo elastic deformation. Furthermore, due to the presence of the backflow airflow, the PVDF hollow fiber membrane undergoes backflow cleaning. Therefore, the combination of these two factors makes it easier for impurities in the portion of the PVDF hollow fiber membrane located between the two landing points to be backflowed and cleaned. Moreover, due to the reciprocating motion, the landing point constantly changes, so any position of the PVDF hollow fiber membrane can be subjected to the aforementioned effects, greatly improving the cleaning effect on the PVDF hollow fiber membrane. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the structure of the present invention;

[0040] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0041] Figure 3 This is a schematic diagram of the agitator, membrane module, and gas supply module;

[0042] Figure 4 This is a schematic diagram of the mixing component;

[0043] Figure 5 This is a schematic diagram of the membrane module and the gas supply module;

[0044] Figure 6 This is a schematic diagram of a membrane module;

[0045] Figure 7 This is a cross-sectional view of a membrane unit;

[0046] Figure 8 A schematic diagram for cleaning components;

[0047] Figure 9 This is a sectional view of the crossbar;

[0048] Figure 10 This is a schematic diagram showing the landing points of the airflow ejected through two adjacent nozzles on the PVDF hollow fiber membrane.

[0049] The labels in the attached diagram are:

[0050] 100. Treatment tank; 101. Sewage pipe; 102. Air inlet pipe; 103. Clean water pipe; 104. Exhaust pipe; 1041. Valve 1; 105. Sewage discharge pipe; 1051. Valve 2; 106. Equalization tank; 107. Anoxic tank; 108. Aerobic tank; 109. Reaction tank; 110. Sludge tank; 111. Pump 1; 112. Screw conveyor assembly; 113. Valve 3; 114. Sludge pipe; 115. Valve 4; 116. Air supply assembly; 1161. Compressor; 1162. Air storage tank; 1163. Pipeline 1; 1164. Pipeline 2; 165. Pipeline 3; 1166. Connecting valve; 1167. Pipeline 4; 117. Agitator; 1171. Agitator shaft; 1172. Blade; 118. Membrane module; 119. Pump 2; 120. Water pipe 1; 121. Water pipe 2; 122. Connecting shaft; 123. Horizontal pipe; 124. Membrane unit; 1241. Longitudinal pipe; 1242. PVDF hollow fiber membrane; 125. Motor; 126. Threaded shaft; 127. Support; 128. Connecting rod; 129. Frame; 1291. Crossbar; 1292. Longitudinal bar; 1293. Nozzle. Detailed Implementation

[0051] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0052] Reference Figure 1 , Figure 2 and Figure 5 An integrated MBR underground sewage treatment equipment includes a treatment tank 100, which is buried underground.

[0053] The treatment tank 100 is equipped with a partition that divides the internal area of ​​the treatment tank 100 into an installation area and a clean water area that are not connected to each other.

[0054] The installation area contains five tanks: equalization tank 106, anoxic tank 107, aerobic tank 108, reaction tank 109, and sludge tank 110.

[0055] The remaining four pools, excluding sludge pool 110, are connected to each other by pump 111, which allows for the transfer of sewage between adjacent pools. There are three pumps 111.

[0056] A second pump 119 is installed between the reaction tank 109 and the clear water zone. The inlet end of the second pump 119 is connected to the reaction tank 109 through a water pipe 120, and the outlet end of the second pump 119 is connected to the clear water zone through a water pipe 121.

[0057] The installation area also includes an exhaust pipe 104 located above the pool and an auger conveyor 112 located below the pool.

[0058] The exhaust pipe 104 is connected to the pool via valve 1041. Five valves 1041 are provided. The exhaust end of the exhaust pipe 104 extends out of the treatment tank 100.

[0059] The auger conveyor 112 can be implemented using existing auger conveying technology, which will not be elaborated here. The auger conveyor 112 is connected to the four pools other than the sludge pool 110 through four valves 113. The output end of the auger conveyor 112 is connected to the sludge pipe 114 and a valve 115 is provided at the connection. The end of the sludge pipe 114 is connected to the sludge pool 110. The bottom of the sludge pool 110 is connected to the sewage pipe 105 and a valve 1051 is provided at the connection. The end of the sewage pipe 105 extends out of the treatment tank 100.

[0060] A sewage pipe 101 is provided on the upper surface of the equalization tank 106, and the upper end of the sewage pipe 101 extends out of the treatment tank 100.

[0061] The upper surface of the treatment tank 100 is provided with a clean water pipe 103 that communicates with the clean water area and an air inlet pipe 102 that communicates with the installation area. A valve is provided at the upper end of the clean water pipe 103.

[0062] When in use, sewage enters the equalization tank 106 through sewage pipe 101, and under the traction of pump 111, it passes through equalization tank 106, anoxic tank 107, aerobic tank 108 and reaction tank 109 in sequence, and is treated in these four tanks in sequence. Finally, the clear water is drawn by pump 219 and flows into the clear water area for temporary storage.

[0063] Each time wastewater passes through one of the aforementioned tanks, it will generate sludge to varying degrees. Valve 113 can be opened periodically to allow the sludge to fall into the auger conveyor 112 under the guidance of the inclined bottom of the tank, and then be pulled and transported to the sludge tank 110 for temporary storage. It should be noted that the sludge contains water and is therefore viscous, and will fall into the auger conveyor 112 under the guidance of the inclined bottom. The amount of sludge generated in each tank is different, therefore, the periodic sludge discharge cycle of different tanks is different. For example, the reaction tank 109 generates more sludge and has a shorter cycle, while the equalization tank 106 generates less sludge and has a longer cycle.

[0064] The sludge in the sludge tank 110 is periodically removed by suction technology through the sewage pipe 105. The suction technology can be the existing sewage pumping technology, which will not be described in detail.

[0065] The clean water in the clean water area is periodically pumped out through the clean water pipe 103 using technologies such as water pumps.

[0066] During the wastewater treatment process, the aerobic tank 108 needs to be replenished with air, so an air inlet pipe 102 is installed to connect it to the outside.

[0067] During the wastewater treatment process, some gas will be generated in the pool. Therefore, an exhaust pipe 104 is installed to exhaust the gas and prevent excessive gas accumulation in the pool from causing an explosion.

[0068] Reference Figure 3 and Figure 5 An air supply assembly 116 is provided in the installation area of ​​the treatment tank 100. The air supply assembly 116 includes an air storage tank 1162. A compressor 1161 is connected to the air inlet of the air storage tank 1162, and a pipe 1163 is provided at the air outlet with a valve 6 at the connection. The end of the pipe 1163 is connected to a pipe 2 1164 and a pipe 3 1165, and valves 7 and 8 are respectively provided at the two connections.

[0069] Pipeline 3 1165 is connected to sludge tank 110. When sludge tank 110 is periodically discharged, air is injected into sludge tank 110 to assist in the discharge of sludge.

[0070] Pipe 1163 and water pipe 120 are connected by connecting valve 1166, which serves as the medium for periodic backflushing and tilting of the membrane, as will be explained later.

[0071] Pipeline 1163 is also connected to pipe 4167, and valve 9 is installed at the connection point.

[0072] Reference Figure 3 The aerobic tank 108 is equipped with a stirring component 117.

[0073] Reference Figure 4The agitator 117 includes an agitator shaft 1171, which is a cylindrical shaft with an open top and a closed bottom. Its upper end extends out of the aerobic tank 108 and is connected to the second pipe 1164 through a rotary joint. Several blades 1172 are arranged in an array along the circumferential direction on its exterior. The blades 1172 are hollow inside and communicate with the inner cavity of the agitator shaft 1171. The blades 1172 are arc-shaped.

[0074] Compressed air supplied by the air supply component 116 flows into the stirring shaft 1171 through pipe 1163 and pipe 2 1164, and flows out through the blades 1172 to provide oxygen to the aerobic tank 108. At the same time, under the reaction force, the stirring component 117 rotates to stir the sewage in the aerobic tank 108, making the oxygen distribution more uniform and improving the sewage treatment effect of the aerobic tank 108.

[0075] Reference Figure 3 A membrane module 118 is installed inside the reaction tank 109.

[0076] Reference Figures 5-8 The membrane module 118 includes a membrane unit 124, which includes a longitudinal pipe 1241 and a plurality of PVDF hollow fiber membranes 1242. The ends of the PVDF hollow fiber membranes 1242 are connected to the longitudinal pipe 1241, and the plurality of PVDF hollow fiber membranes 1242 are arranged in an array along the extension direction of the longitudinal pipe 1241.

[0077] The membrane unit 124 array is provided with multiple longitudinal pipes 1241 of multiple membrane units 124, and the longitudinal pipes 1241 of multiple membrane units 124 are connected by transverse pipes 123. A connecting shaft 122 is provided on the upper surface of the transverse pipe 123. The connecting shaft 122 is hollow and communicates with the transverse pipe 123. The upper end of the connecting shaft 122 extends out of the reaction tank 109 and is connected to the water pipe 120.

[0078] Therefore, through the suction of pump 2 119, the clean water filtered by PVDF hollow fiber membrane 1242 flows into the clean water area for temporary storage through longitudinal pipe 1241, horizontal pipe 123, connecting shaft 122, water pipe 120 and water pipe 2 121, while impurities are blocked by PVDF hollow fiber membrane 1242.

[0079] Furthermore, the membrane module 118 also includes a cleaning component for cleaning the PVDF hollow fiber membrane 1242.

[0080] The cleaning component includes a frame 129, which is composed of crossbars 1291 and longitudinal bars 1292. The crossbars 1291 are parallel to the longitudinal pipes 1241. Several crossbars 1291 are arranged in an array, and the membrane unit 124 is located between two adjacent crossbars 1291. The crossbars 1291 are connected to each other through the longitudinal bars 1292.

[0081] The crossbar 1291 and the longitudinal bar 1292 are hollow inside. A connecting rod 128 is provided on the upper surface of the longitudinal bar 1292. The connecting rod 128 is also hollow inside and its upper end is connected to the pipe 1167.

[0082] The upper end of the connecting rod 128 is also provided with a bracket 127. The bracket 127 is driven by the linear module to move vertically. Further, the linear module includes a threaded shaft 126 sleeved on the outside of the connecting shaft 122. The lower end of the threaded shaft 126 is connected to the bracket 127, and the upper end of the threaded shaft 126 extends out of the reaction tank 109 and is poweredly connected to the motor 125. Furthermore, the driven member of the power transmission component between the motor 125 and the threaded shaft 126 is threaded on the outside of the threaded shaft 126, and the driven member is restricted by the support set on the upper surface of the reaction tank 109, and can only rotate. At the same time, the bracket 127 and the vertically arranged guide rod form a sliding connection. Therefore, the motor 125 can drive the threaded shaft 126 to move vertically, thereby moving the bracket 127 together, so that the crossbar 1291 reciprocates between the upper and lower ends of the PVDF hollow fiber membrane 1242.

[0083] Reference Figure 9 A nozzle 1293 is provided on the side of the crossbar 1291 facing the PVDF hollow fiber membrane 1242. Multiple nozzles 1293 are arranged in an array along the extension direction of the crossbar 1291. Furthermore, the nozzles 1293 are arranged at an angle, and in two adjacent nozzles 1293, one nozzle 1293 is inclined upward and the other nozzle 1293 is inclined downward.

[0084] While the crossbar 1291 reciprocates between the upper and lower ends of the PVDF hollow fiber membrane 1242, compressed air flows into the crossbar 1291 through pipe 1163, pipe 1167, connecting rod 128, and vertical rod 1292, and is sprayed onto the PVDF hollow fiber membrane 1242 through nozzle 1293. Simultaneously, compressed air also flows into the PVDF hollow fiber membrane 1242 through pipe 1163, water pipe 120, connecting shaft 122, horizontal pipe 123, and vertical pipe 1241, achieving backflushing of the PVDF hollow fiber membrane 1242. In other words, the cleaning of the PVDF hollow fiber membrane 1242 is achieved through the combination of reciprocating movement, airflow ejection, and airflow backflushing. Its technical advantages are:

[0085] Reference Figure 10 Since one of the two adjacent nozzles 1293 is inclined upward and the other is inclined downward, the airflow ejected through the two adjacent nozzles 1293 is also inclined upward and downward. The coordination of the inclined airflow and the reciprocating motion can achieve the initial air flushing of the PVDF hollow fiber membrane 1242.

[0086] Meanwhile, the point where the airflow contacts the PVDF hollow fiber membrane 1242 is named the landing point. With the upward-sloping airflow and the downward-sloping airflow working together, the portion of the PVDF hollow fiber membrane 1242 located between the two landing points is subjected to an upward and downward pulling effect. In other words, the fiber pores of the PVDF hollow fiber membrane 1242 located between the two landing points will undergo elastic deformation. Furthermore, due to the presence of the backflow airflow, the PVDF hollow fiber membrane 1242 undergoes backflow cleaning. Therefore, the combination of these two factors makes it easier for impurities in the portion of the PVDF hollow fiber membrane 1242 located between the two landing points to be backflowed and cleaned. Due to the reciprocating motion, the landing point is constantly changing. Therefore, any position of the PVDF hollow fiber membrane 1242 can be subjected to the aforementioned effects, greatly improving the cleaning effect on the PVDF hollow fiber membrane 1242.

[0087] The core of this case lies in the cleaning of the PVDF hollow fiber membrane. As for the treatment of wastewater in the equalization tank, anoxic tank, and aerobic tank, existing technologies can be used, so it will not be elaborated here.

[0088] Appendix Figure 10 In the diagram, ab refers to the two landing points, the arrow indicates the airflow ejected through the nozzle, and the bold line refers to the PVDF hollow fiber membrane.

[0089] It is important to note that PVDF hollow fiber membranes have excellent elastic deformation properties, typically ranging from 150% to 200%. Therefore, as the landing point changes, the deformation in areas outside the landing point will recover and will not affect subsequent membrane filtration.

[0090] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An integrated MBR buried sewage treatment equipment, comprising a treatment tank (100), wherein a partition disposed within the treatment tank (100) divides the inner cavity of the treatment tank (100) into an installation area and a clear water area that are not interconnected, wherein the installation area is provided with five pools, namely an equalization pool (106), an anoxic pool (107), an aerobic pool (108), a reaction pool (109), and a sludge pool (110), characterized in that, A membrane module (118) is provided inside the reaction tank (109), and the membrane module (118) includes a membrane unit (124) and a cleaning component; The cleaning component includes a frame (129), which is composed of crossbars (1291) and vertical bars (1292). The crossbars (1291) are arranged in an array of several, and there is a membrane unit (124) between each two adjacent crossbars (1291). The crossbars (1291) are connected to each other through the vertical bars (1292). The crossbar (1291) and the longitudinal bar (1292) are hollow inside. A connecting rod (128) is provided on the upper surface of the longitudinal bar (1292). The connecting rod (128) is hollow inside. A bracket (127) is provided at the upper end of the connecting rod (128). The bracket (127) is driven by the linear module to move in the vertical direction. A nozzle (1293) is provided on the side of the crossbar (1291) facing the membrane unit (124). Multiple nozzles (1293) are arranged in an array along the extension direction of the crossbar (1291), and in two adjacent nozzles (1293), one nozzle (1293) is inclined upward and the other nozzle (1293) is inclined downward.

2. The MBR integrated underground sewage treatment equipment according to claim 1, characterized in that, The membrane unit (124) includes a longitudinal duct (1241) and several PVDF hollow fiber membranes (1242), and a crossbar (1291) is parallel to the longitudinal duct (1241). The ends of the PVDF hollow fiber membrane (1242) are connected to the longitudinal pipe (1241), and several PVDF hollow fiber membranes (1242) are arrayed along the extension direction of the longitudinal pipe (1241); The longitudinal pipes (1241) of several membrane units (124) are connected by a horizontal pipe (123). A connecting shaft (122) is provided on the upper surface of the horizontal pipe (123). The connecting shaft (122) is hollow and communicates with the horizontal pipe (123). The upper end of the connecting shaft (122) extends out of the reaction tank (109) and is connected to the clear water zone through pump two (119).

3. The MBR integrated underground sewage treatment equipment according to claim 2, characterized in that, The linear module includes a threaded shaft (126) sleeved on the outside of the connecting shaft (122). The lower end of the threaded shaft (126) is connected to the bracket (127). The upper end of the threaded shaft (126) extends out of the reaction tank (109) and is poweredly connected to a motor (125). The driven part of the power transmission component set between the motor (125) and the threaded shaft (126) is threaded on the outside of the threaded shaft (126), and the driven part is restricted to rotation by a support set on the upper surface of the reaction tank (109). The bracket (127) and the vertically arranged guide rod form a sliding connection.

4. The MBR integrated underground sewage treatment equipment according to claim 2, characterized in that, An air supply assembly (116) is provided in the installation area of ​​the processing tank (100). The air supply assembly (116) includes an air storage tank (1162). A compressor (1161) is connected to the air inlet of the air storage tank (1162), and a pipe (1163) is provided at the air outlet with a valve (6) at the connection. A pipe (4) (1167) is provided outside the pipe (1163) with a valve (9) at the connection. The upper end of the connecting rod (128) is connected to the pipe (4) (1167).

5. The MBR integrated underground sewage treatment equipment according to claim 4, characterized in that, The upper end of the connecting shaft (122) is connected to the second pump (119) through the first water pipe (120), and the first pipe (1163) and the first water pipe (120) are connected through the connecting valve (1166).

6. The MBR integrated underground sewage treatment equipment according to claim 4, characterized in that, Pipeline 1 (1163) is connected to Pipeline 3 (1165) at its end and valve 8 is installed at the connection. Pipeline 3 (1165) is connected to sludge tank (110).

7. The MBR integrated underground sewage treatment equipment according to claim 4, characterized in that, Pipeline 1 (1163) is connected to Pipeline 2 (1164) at its end and valve 7 is installed at the connection. An agitator (117) is installed in the aerobic tank (108). The upper end of the agitator (117) is connected to the second pipe (1164). Compressed air is input into the aerobic tank (108) through the second pipe (1164) and the agitator (117). Driven by the flow of compressed air, the agitator (117) rotates.

8. The MBR integrated underground sewage treatment equipment according to claim 7, characterized in that, The agitator (117) includes an agitator shaft (1171), which is a cylindrical shaft with an open top and a closed bottom. The upper end extends out of the aerobic tank (108) and is connected to the second pipe (1164) through a rotary joint. Several blades (1172) are arranged in an array along the circumferential direction on the outside of the agitator shaft (1171). The blades (1172) are hollow inside and communicate with the inner cavity of the agitator shaft (1171). The blades (1172) are arc-shaped.

9. The MBR integrated underground sewage treatment equipment according to claim 1, characterized in that, Of the four remaining pools excluding the sludge pool (110), adjacent pools are connected by a pump (111), and three pumps (111) are provided. The installation area also contains an exhaust pipe (104) located above the pool and an auger conveyor (112) located below the pool. The exhaust pipe (104) is connected to the pool through valve one (1041). There are five valves one (1041) and the exhaust end of the exhaust pipe (104) extends out of the treatment tank (100). The auger conveyor (112) is connected to the four pools other than the sludge tank (110) through four valves (113). The output end of the auger conveyor (112) is connected to a sludge pipe (114) and a valve (115) is provided at the connection. The end of the sludge pipe (114) is connected to the sludge tank (110). The bottom of the sludge tank (110) is connected to a sewage pipe (105) and a valve (1051) is provided at the connection. The end of the sewage pipe (105) extends out of the treatment tank (100). A sewage pipe (101) is provided on the upper surface of the equalization tank (106), and the upper end of the sewage pipe (101) extends out of the treatment tank (100). The upper surface of the treatment tank (100) is provided with a clean water pipe (103) that communicates with the clean water area and an air inlet pipe (102) that communicates with the installation area. A valve five is provided at the upper end of the clean water pipe (103).

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