Pure membrane moving bed biofilm reactor (MBBR) aerobic denitrification device

Abstract

The utility model relates to the technical field of pure membrane MBBRs (Moving Bed Biofilm Reactor), and discloses a pure membrane MBBR aerobic denitrification device which comprises a sewage treatment device body, the sewage treatment device body comprises a box body, and a box groove is formed in the left side of an inner cavity of the box body. According to the pure membrane MBBR aerobic denitrification device, a second connecting pipe and a first fixing plate are placed on the top of a second gas outlet pipe and the top of a second fixing plate through hand holding, then bolts are inserted into inner cavities of the first fixing plate and the second fixing plate through an operator, and then threaded sleeves are installed at the bottoms of the bolts, so that the effect of installing and fixing a gas collecting bottle in a working state is achieved; and then the switching valve is in an open state, then the effect of collecting nitrogen discharged by the gas outlet pipe II is achieved, and the problems that in the pure membrane MBBR technological process, an MBBR special flow pushing device is needed for anoxic denitrification, and the pure membrane MBBR is not suitable for some occasions, that is, the cost performance for achieving the environment of anoxic denitrification by adopting the pure membrane MBBR is not high are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of pure membrane MBBR, in particular to a pure membrane MBBR aerobic denitrification device. Background Art

[0002] The moving bed biofilm reactor is another innovative biofilm reactor that has attracted much attention from researchers in recent years. It was developed to solve the complex operations of fixed bed reactors requiring regular backwashing, submerged biofilters requiring filter media cleaning and aerator replacement when they are clogged.

[0003] At present, pure membrane MBBR is generally widely used in urban sewage treatment, industrial wastewater treatment, hospital sewage treatment and other fields. However, in the pure membrane MBBR process, anoxic denitrification requires MBBR proprietary flow promoter, which is not applicable in some occasions. In other words, the cost-effectiveness of using pure membrane MBBR for anoxic denitrification is not high. Therefore, this device realizes aerobic denitrification process by optimizing the MBBR system to solve the problems raised in the above background technology. Utility Model Content

[0004] The purpose of the utility model is to provide a pure membrane MBBR aerobic denitrification device to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A pure membrane MBBR aerobic denitrification device comprises a sewage treatment device body, wherein the sewage treatment device body comprises a box body, a box slot is provided on the left side of the inner cavity of the box body, a discharge pipe is connected to the bottom of the right side of the box body, a pipe cover 1 is movably connected to the right side of the discharge pipe, and a denitrification mechanism is installed on the left side of the inner cavity of the box body;

[0007] The denitrification mechanism comprises a shell, the surface of which is fixedly connected to the inner cavity of the box body, an anoxic pool is provided on the left side of the inner cavity of the shell, an aerobic pool is provided on the right side of the inner cavity of the shell, a flow guide pipe is fixedly connected to the bottom of the inner cavity of the shell, the right side of the flow guide pipe is connected to the inner cavity of the aerobic pool, the left side of the flow guide pipe is connected to the inner cavity of the tank, the top of the anoxic pool is connected to an outlet pipe 2, the top of the outlet pipe 2 penetrates to the top of the box body, and an air collecting mechanism is installed on the top of the outlet pipe 2;

[0008] The gas collecting mechanism includes a connecting tube 2, the bottom of which is movably connected to the top of an air outlet pipe 2, the top of which is connected to a switch valve, the top of which is connected to a gas collecting bottle, the bottom of the surface of the connecting tube 2 is fixedly connected to a fixing plate 1, the top of the surface of the air outlet pipe 2 is fixedly connected to a fixing plate 2, both sides of the inner cavities of the fixing plate 2 and the fixing plate 1 are movably connected with bolts, the bottom of the bolt surface is movably connected with a screw sleeve, and the top of the screw sleeve is movably connected to the bottom of the fixing plate 2.

[0009] As a further solution of the utility model: the top of the aerobic pool is connected to an extraction pipe 1, the top of the extraction pipe 1 passes through the top of the box, the left side of the extraction pipe 1 is connected to a reflux pump, the left side of the reflux pump is connected to a delivery pipe 1, and the bottom of the delivery pipe 1 passes through the inner cavity of the anoxic pool.

[0010] As a further solution of the utility model: a water pump is installed on the left side of the box body, the bottom of the water pump is connected to a water inlet pipe, the right side of the water inlet pipe is connected to a water inlet pipe, the right side of the water inlet pipe penetrates into the inner cavity of the box trough, the inner cavity of the box trough is fixedly connected with a coarse filter plate, and the inner cavity of the coarse filter plate is provided with a plurality of circular holes.

[0011] As a further solution of the utility model: the front side of the top of the shell is connected with a feed pipe, the top of the feed pipe passes through the top of the box body, the top of the feed pipe is movably connected with a pipe cover 2, the inner cavity of the aerobic pool is fixedly connected with an air outlet pipe 1, the top of the air outlet pipe 1 is connected with a jet head, the number of the jet heads is plural, the front side of the air outlet pipe 1 passes through the front side of the box body and is connected with an air pump, the back side of the air pump is fixedly connected to the front side of the box body, and the front side of the air pump is connected with an air inlet pipe.

[0012] As a further solution of the utility model: the front side of the bottom of the anoxic pool is connected to an extraction pipe 2, the bottom of the extraction pipe 2 passes through the bottom of the box, the right side of the extraction pipe 2 is connected to a suction pump, the right side of the suction pump is connected to a delivery pipe 2, the top of the delivery pipe 2 passes through the inner cavity of the box and is connected to a sedimentation box, the inner cavity of the sedimentation box is fixedly connected to the inner cavity of the box, the bottom of the extraction pump is fixedly connected to a bracket, and the back side of the top of the bracket is fixedly connected to the bottom of the box.

[0013] As a further solution of the utility model: a water pump 2 is fixedly connected to the right side of the sedimentation box, a water inlet pipe 2 is connected to the left side of the water pump 2, a connecting pipe 1 is connected to the right side of the water pump 2, a fine filter plate is fixedly connected to the right side of the inner cavity of the box body, a suction pump is fixedly connected to the right side of the top of the box body, a conduit is connected to the bottom of the suction pump, the bottom of the conduit passes through the inner cavity of the box body, a water outlet pipe is connected to the top of the suction pump, the bottom of the water outlet pipe passes through the inner cavity of the box body and is connected to a nozzle.

[0014] As a further solution of the utility model: the front side and the back side of the right side of the water pump and the two sides of the bottom of the reflux pump are fixedly connected with a mounting plate, the inner cavity of the mounting plate is installed with a fixing rod, and the bottom and right side of the mounting plate are respectively fixedly connected to the left side and the top of the box body.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model places the connecting pipe 2 and the fixing plate 1 on the top of the gas outlet pipe 2 and the fixing plate 2 by hand, and then the operator inserts the bolts into the inner cavities of the fixing plates 1 and 2, and then installs the screw sleeves on the bottom of the bolts, so as to achieve the effect of installing and fixing the gas collecting bottle in the working state, and then makes the switch valve open, and then achieves the effect of collecting the nitrogen discharged from the gas outlet pipe 2, which solves the problem that the MBBR proprietary flow pusher is required for anoxic denitrification in the pure membrane MBBR process, but is not applicable in some occasions, that is, the cost-effectiveness of the pure membrane MBBR for anoxic denitrification environment is not high.

[0017] 2. The utility model arranges an extraction pipe 1, a reflux pump and a delivery pipe 1, so that sewage reacts with oxygen in an aerobic tank to generate a nitrified liquid. Subsequently, the reflux pump is used to allow the nitrified liquid to enter the interior of the extraction pipe 1, and then the nitrified liquid is discharged into the inner cavity of the anoxic tank through the delivery pipe 1, thereby achieving the effect of refluxing the nitrified liquid. By arranging the feed pipe, the denitrifying bacteria are injected into the interior of the shell. By arranging the pipe cover 2, the shell in the working state is sealed. By arranging the outlet pipe 1, air is drawn into the interior of the outlet pipe 1 through the inlet pipe, and then the air is evenly discharged through the nozzle, thereby achieving the effect of fully reacting the sewage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of a pure membrane MBBR aerobic denitrification device;

[0019] Figure 2 This is a bottom view of the box in the pure membrane MBBR aerobic denitrification device;

[0020] Figure 3This is a cross-sectional view of the box in the pure membrane MBBR aerobic denitrification device;

[0021] Figure 4 This is a schematic diagram of the structural connection of the feed pipe in the pure membrane MBBR aerobic denitrification device;

[0022] Figure 5 It is a cross-sectional view of the outer shell of a pure membrane MBBR aerobic denitrification device;

[0023] Figure 6 This is a schematic diagram of the structural connection of the switch valve in the pure membrane MBBR aerobic denitrification device;

[0024] Figure 7 This is a schematic diagram of the structural connection of the second water pump in the pure membrane MBBR aerobic denitrification device;

[0025] Figure 8 This is a cross-sectional view of the sedimentation tank in the pure membrane MBBR aerobic denitrification device.

[0026] In the figure: 1. sewage treatment device body; 101. box body; 102. outlet pipe; 103. discharge pipe; 104. pipe cover 1; 105. suction pump; 106. water inlet pipe; 107. water inlet pipe 1; 108. water pump 1; 109. fixing rod; 110. mounting plate; 111. box trough; 112. coarse filter plate; 113. sedimentation box; 114. fine filter plate; 115. conduit; 116. nozzle; 117. water pump 2; 118. connecting pipe 1; 119. water inlet pipe 2; 2. denitrification mechanism; 201. shell; 202. guide pipe; 203 , air inlet pipe; 204, vacuum pump; 205, nozzle; 206, outlet pipe 1; 207, reflux pump; 208, aerobic tank; 209, delivery pipe 1; 210, pipe cover 2; 211, feed pipe; 212, extraction pipe 1; 213, extraction pump; 214, extraction pipe 2; 215, bracket; 216, delivery pipe 2; 217, outlet pipe 2; 218, anoxic tank; 3, gas collecting mechanism; 301, gas collecting bottle; 302, switch valve; 303, fixing plate 1; 304, fixing plate 2; 305, bolt; 306, screw sleeve; 307, connecting pipe 2. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figure 1-8The pure membrane MBBR aerobic denitrification device comprises a sewage treatment device body 1, the sewage treatment device body 1 comprises a box body 101, a box slot 111 is provided on the left side of the inner cavity of the box body 101, a discharge pipe 103 is connected to the bottom of the right side of the box body 101, a pipe cover 104 is movably connected to the right side of the discharge pipe 103, and a denitrification mechanism 2 is installed on the left side of the inner cavity of the box body 101;

[0029] The denitrification mechanism 2 includes a shell 201, the surface of the shell 201 is fixedly connected to the inner cavity of the box 101, an anoxic pool 218 is provided on the left side of the inner cavity of the shell 201, an aerobic pool 208 is provided on the right side of the inner cavity of the shell 201, a flow guide pipe 202 is fixedly connected to the bottom of the inner cavity of the shell 201, the right side of the flow guide pipe 202 is connected to the inner cavity of the aerobic pool 208, the left side of the flow guide pipe 202 is connected to the inner cavity of the tank 111, the top of the anoxic pool 218 is connected to the second outlet pipe 217, the top of the second outlet pipe 217 penetrates to the top of the box 101, and the top of the second outlet pipe 217 is installed with a gas collecting mechanism 3;

[0030] The gas collecting mechanism 3 includes a connecting tube 2 307, the bottom of the connecting tube 2 307 is movably connected to the top of the air outlet pipe 217, the top of the connecting tube 2 307 is connected to a switch valve 302, the top of the switch valve 302 is connected to a gas collecting bottle 301, the bottom of the surface of the connecting tube 2 307 is fixedly connected to a fixing plate 1 303, the top of the surface of the air outlet pipe 217 is fixedly connected to a fixing plate 2 304, both sides of the inner cavity of the fixing plate 2 304 and the fixing plate 1 303 are movably connected with bolts 305, the bottom of the surface of the bolt 305 is movably connected with a screw sleeve 306, and the top of the screw sleeve 306 is movably connected to the bottom of the fixing plate 2 304.

[0031] Specifically, the top of the aerobic pool 208 is connected to an extraction pipe 212, the top of the extraction pipe 212 passes through the top of the box 101, the left side of the extraction pipe 212 is connected to a reflux pump 207, the left side of the reflux pump 207 is connected to a delivery pipe 209, and the bottom of the delivery pipe 209 passes through the inner cavity of the anoxic pool 218.

[0032] Through the above technical scheme, by setting up the extraction pipe 212, the reflux pump 207 and the delivery pipe 209, the sewage reacts with oxygen after passing through the aerobic tank 208 to produce nitrification liquid, and then the reflux pump 207 allows the nitrification liquid to enter the interior of the extraction pipe 212, and then discharge into the inner cavity of the anoxic tank 218 through the delivery pipe 209, thereby achieving the effect of refluxing the nitrification liquid.

[0033] Specifically, a water pump 108 is installed on the left side of the box body 101, the bottom of the water pump 108 is connected to a water inlet pipe 107, the right side of the water inlet pipe 107 is connected to a water inlet pipe 106, the right side of the water inlet pipe 106 penetrates into the inner cavity of the box trough 111, the inner cavity of the box trough 111 is fixedly connected to a coarse filter plate 112, and the inner cavity of the coarse filter plate 112 is provided with a plurality of circular holes.

[0034] Through the above technical scheme, the sewage enters the interior of the water inlet pipe 107 through the operation of the water pump 108, and then is discharged into the inner cavity of the tank 111 through the water inlet pipe 106, and then the discharged sewage is pre-treated by the coarse filter plate 112, so as to achieve preliminary filtration of large particle suspended matter and impurities in the sewage.

[0035] Specifically, the front side of the top of the shell 201 is connected to a feed pipe 211, the top of the feed pipe 211 passes through the top of the box body 101, the top of the feed pipe 211 is movably connected to a pipe cover 210, the inner cavity of the aerobic tank 208 is fixedly connected to an air outlet pipe 206, the top of the air outlet pipe 206 is connected to a nozzle 205, the number of nozzles 205 is multiple, the front side of the air outlet pipe 206 passes through the front side of the box body 101 and is connected to an air pump 204, the back side of the air pump 204 is fixedly connected to the front side of the box body 101, and the front side of the air pump 204 is connected to an air inlet pipe 203.

[0036] Through the above technical scheme, by setting the feed pipe 211, the effect of injecting denitrifying bacteria into the interior of the outer shell 201 is achieved, by setting the pipe cover 210, the effect of sealing the outer shell 201 in the working state is achieved, and by setting the outlet pipe 206, the effect of drawing air into the interior of the outlet pipe 206 through the inlet pipe 203 and then evenly discharging it through the nozzle 205 is achieved, thereby achieving the effect of fully reacting the sewage.

[0037] Specifically, the front side of the bottom of the anoxic pool 218 is connected to an extraction pipe 214, the bottom of the extraction pipe 214 passes through the bottom of the box 101, the right side of the extraction pipe 214 is connected to a suction pump 213, the right side of the suction pump 213 is connected to a delivery pipe 216, the top of the delivery pipe 216 passes through the inner cavity of the box 101 and is connected to a sedimentation box 113, the inner cavity of the sedimentation box 113 is fixedly connected to the inner cavity of the box 101, the bottom of the extraction pump 213 is fixedly connected to a bracket 215, and the back side of the top of the bracket 215 is fixedly connected to the bottom of the box 101.

[0038] Through the above technical scheme, after the sewage is denitrified through the anoxic tank 218, the pumping pump 213 is started, and the residual material in the anoxic tank 218 is driven into the interior of the extraction pipe 214 through the operation of the pumping pump 213, and then discharged into the interior of the sedimentation tank 113 through the delivery pipe 216, and then the biofilm is precipitated through the sedimentation tank 113, so as to achieve the effect of separating the biofilm from water. Through the setting of the bracket 215, the pumping pump 213 in the working state is supported and fixed to avoid the phenomenon of the pumping pump 213 falling off during the working process.

[0039] Specifically, the right side of the sedimentation box 113 is fixedly connected to a water pump 117, the left side of the water pump 117 is connected to a water inlet pipe 119, the right side of the water pump 117 is connected to a connecting pipe 118, the right side of the inner cavity of the box body 101 is fixedly connected to a fine filter plate 114, the right side of the top of the box body 101 is fixedly connected to a suction pump 105, the bottom of the suction pump 105 is connected to a conduit 115, the bottom of the conduit 115 passes through the inner cavity of the box body 101, the top of the suction pump 105 is connected to a water outlet pipe 102, the bottom of the water outlet pipe 102 passes through the inner cavity of the box body 101 and is connected to a nozzle 116.

[0040] Through the above technical scheme, after the material is precipitated in the sedimentation box 113, the water pump 117 is started. The water inside the sedimentation box 113 enters the inside of the water inlet pipe 119 through the operation of the water pump 117, and then is discharged into the inside of the box body 101 through the connecting pipe 118. The discharged water is then finely filtered through the fine filter plate 114, and then the suction pump 105 is started. Then, the water inside the box body 101 enters the inside of the conduit 115 through the operation of the suction pump 105, and then enters the inside of the water outlet pipe 102, and is then sprayed out through the nozzle 116, so as to achieve the effect of backwashing the fine filter plate 114.

[0041] Specifically, the front and back sides of the right side of the water pump 108 and both sides of the bottom of the reflux pump 207 are fixedly connected with a mounting plate 110, a fixing rod 109 is installed in the inner cavity of the mounting plate 110, and the bottom and right side of the mounting plate 110 are respectively fixedly connected to the left and top of the box body 101.

[0042] Through the above technical solution, by setting the fixing rod 109 and the mounting plate 110, the water pump 108 and the return pump 207 in the working state can be installed and fixed, avoiding the water pump 108 and the return pump 207 from collapsing or falling off during operation.

[0043] The working principle of the utility model is as follows: first, denitrifying bacteria are poured into the inner cavity of the anoxic tank 218 through the feed pipe 211, and then the pipe cover 210 is installed on the top of the feed pipe 211, and the connecting pipe 2 307 and the fixing plate 1 303 are placed on the top of the outlet pipe 217 and the fixing plate 2 304 by hand, and then the operator inserts the bolt 305 into the inner cavity of the fixing plate 1 303 and the fixing plate 2 304, and then the screw sleeve 306 is installed on the bottom of the bolt 305, so as to achieve the function of installing and fixing the gas collecting bottle 301 in the working state, and then the switch valve 302 is opened, and then the outlet pipe 217 is discharged. The nitrogen is collected, and then the vacuum pump 204 is started. Then the air enters the interior of the air inlet pipe 203 through the operation of the vacuum pump 204, and then enters the interior of the air outlet pipe 206, and then the air is discharged through the nozzle 205. Next, the water pump 108 is started. The sewage enters the interior of the water inlet pipe 107 through the operation of the water pump 108, and then the sewage is discharged into the inner cavity of the tank 111 through the water inlet pipe 106, and then the sewage is pre-treated through the coarse filter plate 112, so as to achieve preliminary filtration of large particle suspended matter and impurities in the sewage, and then discharged into the interior of the aerobic tank 208 through the guide pipe 202. Then, the sewage is allowed to react with the air to generate nitrification liquid, and then the reflux pump 207 is started. Through the operation of the reflux pump 207, the nitrification liquid in the aerobic tank 208 enters the interior of the extraction pipe 212, and then the nitrification liquid is discharged into the interior of the anoxic tank 218 through the delivery pipe 209. Then, the nitrification liquid is allowed to react with the denitrifying bacteria, and then nitrogen is generated and discharged through the outlet pipe 217, and then enters the interior of the gas collecting bottle 301, so as to achieve the effect of collecting nitrogen. Finally, the extraction pump 213 is started. Through the operation of the extraction pump 213, the material in the anoxic tank 218 enters the interior of the extraction pipe 214, and then through The conveying pipe 216 discharges into the interior of the sedimentation tank 113, and then the biofilm is precipitated through the sedimentation tank 113, and then the water pump 217 is started, and then the sewage enters the interior of the water inlet pipe 219 through the operation of the water pump 217, and then is discharged through the connecting pipe 118, and then the sewage is filtered through the fine filter plate 114, and then the suction pump 105 is started, and the filtered water enters the interior of the conduit 115 through the operation of the suction pump 105, and then enters the interior of the outlet pipe 102, and then the water is sprayed onto the surface of the fine filter plate 114 through the nozzle 116, so as to achieve the effect of backwashing the fine filter plate 114.

[0044] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pure membrane MBBR aerobic denitrification device, comprising a sewage treatment device body (1), characterized in that: The sewage treatment device body (1) comprises a box body (101), a box groove (111) is provided on the left side of the inner cavity of the box body (101), a discharge pipe (103) is connected to the bottom of the right side of the box body (101), a pipe cover (104) is movably connected to the right side of the discharge pipe (103), and a denitrification mechanism (2) is installed on the left side of the inner cavity of the box body (101); The denitrification mechanism (2) comprises a shell (201), the surface of the shell (201) is fixedly connected to the inner cavity of the housing (101), an anoxic pool (218) is provided on the left side of the inner cavity of the shell (201), an aerobic pool (208) is provided on the right side of the inner cavity of the shell (201), a flow guide pipe (202) is fixedly connected to the bottom of the inner cavity of the shell (201), the right side of the flow guide pipe (202) is connected to the inner cavity of the aerobic pool (208), the left side of the flow guide pipe (202) is connected to the inner cavity of the tank (111), the top of the anoxic pool (218) is connected to a second air outlet pipe (217), the top of the second air outlet pipe (217) penetrates to the top of the housing (101), and a gas collecting mechanism (3) is installed on the top of the second air outlet pipe (217); The gas collecting mechanism (3) comprises a second connecting pipe (307), the bottom of which is movably connected to the top of the second gas outlet pipe (217), the top of which is connected to a switch valve (302), the top of which is connected to a gas collecting bottle (301), the bottom of the surface of the second connecting pipe (307) is fixedly connected to a first fixing plate (303), the top of the surface of the second gas outlet pipe (217) is fixedly connected to a second fixing plate (304), both sides of the inner cavities of the second fixing plate (304) and the first fixing plate (303) are movably connected to bolts (305), the bottom of the surface of the bolt (305) is movably connected to a screw sleeve (306), and the top of the screw sleeve (306) is movably connected to the bottom of the second fixing plate (304).

2. The pure membrane MBBR aerobic denitrification device according to claim 1, characterized in that: The top of the aerobic pool (208) is connected to an extraction pipe (212), the top of which passes through the top of the box (101), the left side of the extraction pipe (212) is connected to a reflux pump (207), the left side of the reflux pump (207) is connected to a delivery pipe (209), and the bottom of the delivery pipe (209) passes through the inner cavity of the anoxic pool (218).

3. The pure membrane MBBR aerobic denitrification device according to claim 1, characterized in that: A water pump (108) is installed on the left side of the box body (101); the bottom of the water pump (108) is connected to a water inlet pipe (107); the right side of the water inlet pipe (107) is connected to a water inlet pipe (106); the right side of the water inlet pipe (106) penetrates into the inner cavity of the box tank (111); the inner cavity of the box tank (111) is fixedly connected to a coarse filter plate (112); and the inner cavity of the coarse filter plate (112) is provided with a plurality of circular holes.

4. The pure membrane MBBR aerobic denitrification device according to claim 1, characterized in that: The front side of the top of the shell (201) is connected to a feed pipe (211), the top of the feed pipe (211) passes through the top of the box (101), the top of the feed pipe (211) is movably connected to a pipe cover 2 (210), the inner cavity of the aerobic pool (208) is fixedly connected to an air outlet pipe 1 (206), the top of the air outlet pipe 1 (206) is connected to a nozzle (205), the number of the nozzles (205) is plural, the front side of the air outlet pipe 1 (206) passes through the front side of the box (101) and is connected to an air pump (204), the back side of the air pump (204) is fixedly connected to the front side of the box (101), and the front side of the air pump (204) is connected to an air inlet pipe (203).

5. The pure membrane MBBR aerobic denitrification device according to claim 1, characterized in that: The front side of the bottom of the anoxic pool (218) is connected to an extraction pipe (214), the bottom of the extraction pipe (214) passes through the bottom of the box (101), the right side of the extraction pipe (214) is connected to a pumping pump (213), the right side of the extraction pump (213) is connected to a delivery pipe (216), the top of the delivery pipe (216) passes through the inner cavity of the box (101) and is connected to a sedimentation box (113), the inner cavity of the sedimentation box (113) is fixedly connected to the inner cavity of the box (101), the bottom of the extraction pump (213) is fixedly connected to a bracket (215), and the back side of the top of the bracket (215) is fixedly connected to the bottom of the box (101).

6. The pure membrane MBBR aerobic denitrification device according to claim 5, characterized in that: The right side of the sedimentation box (113) is fixedly connected to a second water pump (117), the left side of the second water pump (117) is connected to a second water inlet pipe (119), the right side of the second water pump (117) is connected to a first connecting pipe (118), the right side of the inner cavity of the box body (101) is fixedly connected to a fine filter plate (114), the right side of the top of the box body (101) is fixedly connected to a suction pump (105), the bottom of the suction pump (105) is connected to a conduit (115), the bottom of the conduit (115) penetrates into the inner cavity of the box body (101), the top of the suction pump (105) is connected to a water outlet pipe (102), the bottom of the water outlet pipe (102) penetrates into the inner cavity of the box body (101) and is connected to a nozzle (116).

7. The pure membrane MBBR aerobic denitrification device according to claim 3, characterized in that: The front and back sides of the right side of the water pump 1 (108) and both sides of the bottom of the return pump (207) are fixedly connected with a mounting plate (110), the inner cavity of the mounting plate (110) is installed with a fixing rod (109), and the bottom and right side of the mounting plate (110) are respectively fixedly connected to the left side and top of the box body (101).

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