Equipment for preparing reclaimed water by utilizing sewage in sewage pipe network

Abstract

The utility model aims to provide equipment for preparing reclaimed water by using sewage in a sewage pipe network. The equipment for preparing the reclaimed water from the sewage in the sewage pipe network is characterized in that the equipment for preparing the reclaimed water from the sewage is a buried sewage treatment station and mainly comprises a pretreatment tank, an anoxic biological reaction tank, an aerobic biological reaction tank, a middle water tank, a filter tank, an equipment chamber and a pipe valve system.

Description

Technical Field

[0001] The invention relates to equipment for preparing regenerated water by utilizing sewage in a sewage pipe network. Background Art

[0002] Usually, urban sewage is collected and sent to the sewage pipe network, and then sent to the suburban sewage treatment plant through a multi-stage sewage lifting pump station for treatment before being discharged into the suburban rivers, lakes or oceans. When the amount of sewage increases with the increase of urban population, the problem of incremental sewage treatment is solved by expanding the sewage pipe network and sewage treatment plants. The main disadvantages of the above approach are as follows: (1) The tail water of the sewage treatment plant is not convenient to reuse; (2) The investment is large; (3) The operating cost is high; (4) The construction period is long.

[0003] A better solution needs to be found. Summary of the invention

[0004] The purpose of the present invention is to provide a device for preparing recycled water by utilizing sewage in a sewage pipe network.

[0005] A device for producing recycled water from sewage in a sewage pipe network for achieving the purpose of the present invention is characterized in that the device is an underground sewage treatment station, which mainly includes a pretreatment tank, an anoxic biological reaction tank, an aerobic biological reaction tank, an intermediate water tank, a filter tank, an equipment room, and a pipe and valve system.

[0006] The pretreatment tank mainly includes: a pretreatment tank shell, a coarse grid, a fine grid, and a lifting water pump.

[0007] The pretreatment tank shell is cylindrical barrel or polyhedron, and is made of glass fiber reinforced plastic, plastic, carbon steel or stainless steel. Each pretreatment tank shell is provided with at least one manhole. The coarse grid, fine grid and lifting water pump are installed in the pretreatment tank shell.

[0008] The coarse grille is a basket-type grille made of glass fiber reinforced plastics, plastic, cast iron or stainless steel.

[0009] The fine grid is a basket-type grid made of glass fiber reinforced plastics, plastic, cast iron or stainless steel.

[0010] The anoxic biological reaction tank mainly comprises an anoxic tank shell and an anoxic filler component.

[0011] The anoxic pool shell is cylindrical barrel-shaped or polyhedral-shaped and is made of glass fiber reinforced plastics, plastic, carbon steel or stainless steel. Each anoxic pool shell is provided with at least one manhole.

[0012] The anoxic filler component includes an anoxic flowing filler component and an anoxic fixed filler component.

[0013] The oxygen-deficient fluid filler component is mainly composed of a fluid filler, an upper support body, a lower support body, a porous container, a cleaning gas distribution device, and a bracket.

[0014] The flow filler includes granular, fibrous, spherical, sheet-like, tubular, polyhedral hollow sphere, polyhedral hollow tube, porous hollow sphere, and porous tube.

[0015] The upper support body and the lower support body are porous plates made of stainless steel, glass fiber reinforced plastic or plastic.

[0016] The support is a support column or a hexahedral frame or an X-shaped support made of reinforced concrete or metal or glass fiber reinforced plastic or plastic.

[0017] The upper supporting body and the lower supporting body are installed on the bracket.

[0018] The porous container is made of a stainless steel mesh or a glass fiber reinforced plastic grid or a plastic grid, the upper end of the porous container is mounted on an upper support body, and the lower end is mounted on a lower support body. The fluid filler is filled in the porous container.

[0019] The cleaning air distribution device is a porous tube, which is arranged below the oxygen-deficient flow filler assembly. The cleaning air distribution device is connected to the cleaning air duct, which can be also served by a tubular support.

[0020] The oxygen-deficient fixed filler assembly is composed of a fixed filler, an upper support body, a lower support body, an upper connecting piece, a lower connecting piece, a cleaning gas distribution device, and a bracket.

[0021] The fixed filler includes a long fiber bundle and a strip-shaped object. The long fiber bundle is made of fiber filaments wound into a ring shape or tied at both ends into a bundle shape, and the strip-shaped object is a line, rope or strip made of fiber staples or fiber filaments.

[0022] The upper support body and the lower support body are porous plates or grids made of metal or plastic or glass fiber reinforced plastic or plastic.

[0023] The support is a support column or a hexahedral frame or an X-shaped support made of reinforced concrete or metal or fiberglass or plastic.

[0024] The upper supporting body and the lower supporting body are installed on the bracket.

[0025] The two ends of the fixed filler are respectively suspended on the upper support and the lower support by an upper connecting piece and a lower connecting piece. The upper connecting piece and the lower connecting piece are ropes or stainless steel wires or connecting rings. Or one end of the fixed filler is suspended on the upper support or the lower support and the other end is free.

[0026] The cleaning air distribution device is a porous tube, arranged below the anoxic fixed filler assembly, and connected to the cleaning air duct.

[0027] The cleaning air duct can be doubled up by the tubular support.

[0028] The aerobic biological reaction tank mainly comprises an aerobic tank shell and an aerobic filler component.

[0029] The aerobic pool shell is cylindrical barrel-shaped or polyhedral, and is made of reinforced concrete, plastic, fiberglass or stainless steel, or is composed of a geomembrane and an inner support. Each aerobic pool shell is provided with at least one manhole.

[0030] An aerobic filler assembly is installed in the aerobic pool shell.

[0031] The aerobic filler component includes an aerobic flowing filler component and an aerobic fixed filler component.

[0032] The aerobic fluid filler assembly is mainly composed of a fluid filler, an upper support body, a lower support body, a porous container, an aeration device, a cleaning gas distribution device, and a bracket.

[0033] The flow filler includes granular, fibrous, spherical, sheet-like, tubular, polyhedral hollow sphere, polyhedral hollow tube, porous hollow sphere, and porous tube.

[0034] The upper support body and the lower support body are porous plates or grids made of stainless steel, glass fiber reinforced plastic or plastic.

[0035] The support is a support column or a hexahedral frame or an X-shaped support made of reinforced concrete or metal or glass fiber reinforced plastic or plastic.

[0036] The upper supporting body and the lower supporting body are installed on the bracket.

[0037] The porous container is made of a stainless steel mesh or a glass fiber reinforced plastic grid or a plastic grid. The upper end of the porous container is installed on an upper support body, and the lower end is installed on a lower support body.

[0038] The flow filler is filled in a porous container.

[0039] The aeration device is a porous tube or a microporous aeration tube or a microporous aeration disk or a microporous aeration brick, which is arranged below the aerobic flow filler assembly. The aeration device is connected to the aeration air duct. The aeration air duct can be also used by a tubular support.

[0040] The cleaning air distribution device is a porous tube, which is arranged below the aerobic flow filler assembly. The cleaning air distribution device is connected to the cleaning air duct, which can be also served by a tubular support.

[0041] The aerobic fixed filler assembly is composed of a fixed filler, an upper support body, a lower support body, an upper connecting piece, a lower connecting piece, an aeration device, a cleaning gas distribution device, and a bracket.

[0042] The fixed filler includes a long fiber bundle and a strip-shaped object. The long fiber bundle is made of fiber filaments wound into a ring shape or tied at both ends into a bundle shape, and the strip-shaped object is a line, rope or strip made of fiber staples or fiber filaments.

[0043] The upper support body and the lower support body are porous plates or grids made of metal, plastic or glass fiber reinforced plastic.

[0044] The support is a support column or a hexahedral frame or an X-shaped support made of reinforced concrete or metal or glass fiber reinforced plastic or plastic.

[0045] The upper supporting body and the lower supporting body are installed on the bracket.

[0046] The two ends of the fixed filler are respectively suspended on the upper support and the lower support by an upper connecting piece and a lower connecting piece. The upper connecting piece and the lower connecting piece are ropes or stainless steel wires or connecting rings. Or one end of the fixed filler is suspended on the upper support or the lower support and the other end is free.

[0047] The aeration device is a porous tube or a microporous aeration tube or a microporous aeration disk or a microporous aeration brick, which is arranged below the aerobic fixed filler assembly. The aeration device is connected to the aeration air duct. The aeration air duct can be also used by a tubular support.

[0048] The cleaning air distribution device is a porous tube, which is arranged below the aerobic fixed filler assembly. The cleaning air distribution device is connected to the cleaning air duct, which can be also served by a tubular support.

[0049] The intermediate water tank mainly includes: an intermediate water tank shell.

[0050] The intermediate water tank shell is cylindrical barrel or polyhedron, and is made of glass fiber reinforced plastic, plastic, carbon steel or stainless steel. Each intermediate water tank shell is provided with at least one manhole.

[0051] The filter pool mainly includes: a filter pool shell and a filter component.

[0052] The filter tank shell is cylindrical barrel or polyhedron, and is made of reinforced concrete or glass fiber reinforced plastic or plastic. Each filter tank shell is provided with at least one manhole.

[0053] The filter assembly comprises a flow filter material assembly and a fixed filter material assembly.

[0054] The flow filter material assembly is mainly composed of flow filter material, an upper support body, a lower support body, a porous container, a cleaning gas distribution device, and a bracket.

[0055] The flow filter material includes granular, fibrous, spherical, sheet-like, tubular, polyhedral hollow sphere, polyhedral hollow tube, porous hollow sphere, and porous tube.

[0056] The upper support body and the lower support body are porous plates made of stainless steel, glass fiber reinforced plastic or plastic.

[0057] The support is a support column or a hexahedral frame or an X-shaped support made of reinforced concrete or metal or glass fiber reinforced plastic or plastic.

[0058] The upper supporting body and the lower supporting body are installed on the bracket.

[0059] The porous container is made of a stainless steel mesh or a glass fiber reinforced plastic grid or a plastic grid, the upper end of the porous container is mounted on an upper support body, and the lower end is mounted on a lower support body. The flowing filter material is filled in the porous container.

[0060] The cleaning air distribution device is a porous tube, which is arranged below the flow filter assembly. The cleaning air distribution device is connected to the cleaning air duct, which can be also served by a tubular support.

[0061] The fixed filter material assembly is composed of fixed filter material, an upper support body, a lower support body, an upper connecting piece, a lower connecting piece, a cleaning gas distribution device, and a bracket.

[0062] The fixed filter material includes a long fiber bundle and a strip-shaped object. The long fiber bundle is made of fiber filaments wound into a ring shape or tied at both ends into a bundle shape, and the strip-shaped object is a line, rope or strip made of fiber staples or fiber filaments.

[0063] The upper support body and the lower support body are porous plates or grids made of metal, plastic or glass fiber reinforced plastic.

[0064] The support is a support column or a hexahedral frame or an X-shaped support made of reinforced concrete or metal or glass fiber reinforced plastic or plastic.

[0065] The upper supporting body and the lower supporting body are installed on the bracket.

[0066] The two ends of the fixed filter material are respectively hung on the upper support and the lower support by an upper connecting piece and a lower connecting piece. The upper connecting piece and the lower connecting piece are ropes or stainless steel wires or connecting rings. Or one end of the fixed filter material is hung on the upper support or the lower support and the other end is free.

[0067] The cleaning air distribution device is a porous tube, which is arranged below the fixed filter material assembly. The cleaning air distribution device is connected to the cleaning air duct, which can be also served by a tubular support.

[0068] The equipment room mainly includes: an equipment room shell, a cleaning fan, an aeration fan, a dosing device, a power distribution cabinet, and a control cabinet.

[0069] The equipment room shell is cylindrical barrel-shaped and made of glass fiber reinforced plastic. A manhole is arranged on the upper part of each equipment room shell.

[0070] The cleaning fan, aeration fan, dosing device, power distribution cabinet, and control cabinet equipment are installed in the equipment room shell.

[0071] The pipe and valve system includes several pipes and valves, and the pretreatment tank, the anoxic biological reaction tank, the aerobic biological reaction tank, the intermediate water tank, the filter tank, the equipment indoor cleaning fan, the aeration fan, and the dosing device are connected through the pipe and valve system.

[0072] The anoxic bioreactor and the aerobic bioreactor are used in series, that is, the anoxic bioreactor is connected to the aerobic bioreactor through a diversion pipe. When the equipment is working, sewage flows into the pretreatment tank through the water inlet pipe, and is sent to the anoxic bioreactor through the lifting pump and the diversion pipe after being treated by the coarse screen, sedimentation, and fine screen. The effluent of the anoxic bioreactor enters the aerobic bioreactor through the diversion pipe, and the effluent of the aerobic bioreactor enters the intermediate water tank through the diversion pipe. Part of the water in the intermediate water tank flows back to the pretreatment tank through the reflux pump, the reflux pipe, and the reflux valve, and the other part of the water enters the filter tank through the lifting pump and the diversion pipe. The effluent of the filter tank is discharged through the outlet pipe.

[0073] The drainage generated by cleaning and stripping of the anoxic biological reaction tank, aerobic biological reaction tank, and filter tank can be directly discharged into the sewage inspection well and enter the sewage pipe network. It can also be discharged into the sludge pool for storage and transportation.

[0074] To facilitate inspection and maintenance, manhole covers are provided on the ground above the pretreatment tank, the anoxic biological reaction tank, the aerobic biological reaction tank, the intermediate water tank, the filtration tank, the equipment room, and the pipe and valve system.

[0075] The anoxic bioreactor and aerobic bioreactor are used in a multi-stage series system. That is, the outlet pipe of the first-stage anoxic bioreactor is connected to the inlet pipe of the first-stage aerobic bioreactor, the outlet pipe of the first-stage aerobic bioreactor is connected to the inlet pipe of the second-stage anoxic bioreactor, and the outlet pipe of the second-stage anoxic bioreactor is connected to the inlet pipe of the second-stage aerobic bioreactor.

[0076] The power distribution cabinet, control cabinet and fan equipment can be installed in the underground equipment room or on the ground.

[0077] The anoxic biological reaction pool or aerobic biological reaction pool or filtering pool can be assembled from a number of shells and can be buried underground or placed on the ground.

[0078] The present invention relates to a device for producing recycled water using sewage from a sewage pipe network. Sewage is introduced from the inspection well of the sewage pipe network into an underground rapid biological treatment and purification station. The treated water meets the local discharge standard or the high-quality recycled water quality standard and is reused or replenished in the river nearby. After that, the incremental sewage in the city does not need to be solved by expanding the sewage pipe network and the sewage treatment plant. BRIEF DESCRIPTION OF THE DRAWINGS

[0079] Figure 1 Schematic diagram of sewage pipe network sewage treatment station

[0080] Figure 2 Schematic diagram of underground sewage treatment station

[0081] Figure 3 Schematic diagram of the oxygen-deficient fixed filler assembly

[0082] Figure 4 Schematic diagram of oxygen-deficient flow packing assembly

[0083] Figure 5 Schematic diagram of aerobic fixed packing assembly

[0084] Figure 6 Schematic diagram of aerobic flow packing assembly

[0085] Figure 7 Schematic diagram of fixed filter media assembly

[0086] Figure 8 Schematic diagram of the flow filter assembly DETAILED DESCRIPTION

[0087] See also Figure 1 , Figure 2 , a device for producing recycled water using sewage in a sewage pipe network, the device includes a sewage treatment station buried in the underground soil layer of a green belt 37 on the side of the sewage pipe network 50 along the sewage pipe network 50. Sewage is introduced into the sewage treatment station through an inlet pipe from a manhole 51 of the sewage pipe network. The treated water quality reaches the high-quality recycled water quality standard and is reused or replenished in a river nearby through an outlet pipe 7. The generated sludge is sent back to the sewage pipe network. 40 is an underground sewage treatment station, 200 is a pretreatment tank, 206 is an equipment room, and 34 is a manhole cover.

[0088] See also Figure 2 , Figure 3 , Figure 5 , Figure 7 The sewage treatment station is an underground sewage treatment station 40, which adopts a pretreatment + rapid biological treatment + deep treatment process. It mainly includes a pretreatment tank 200, an anoxic biological reaction tank 201, an aerobic biological reaction tank 202, an intermediate water tank 204, a filter tank 203, an equipment room 206, and a pipe valve system.

[0089] The pretreatment tank 200 mainly includes: a pretreatment tank shell 2001 , a coarse screen 1 , a fine screen 2 , and a lifting water pump 3 .

[0090] The pretreatment tank shell 2001 is cylindrical and made of glass fiber reinforced plastic. A manhole is arranged on the upper part of each pretreatment tank shell 2001. The coarse grid 1, the fine grid 2, and the lifting water pump 3 are installed in the pretreatment tank shell 2001.

[0091] The coarse grid 1 is a basket-type grid made of glass fiber reinforced plastic.

[0092] The fine grid 2 is a basket-type grid made of glass fiber reinforced plastic.

[0093] The anoxic biological reaction tank 201 mainly includes: an anoxic tank shell 2011 and an anoxic filler assembly 30 .

[0094] The anoxic pool housing 2011 is cylindrical and made of glass fiber reinforced plastic. A manhole is arranged on the upper part of each anoxic pool housing 2011.

[0095] The anoxic filler component 30 is an anoxic fixed filler component.

[0096] The oxygen-deficient fixed filler assembly is composed of a fixed filler 13, an upper support body 14, a lower support body 15, an upper connecting piece 16, a lower connecting piece 17, a cleaning gas distribution device 4, and a bracket.

[0097] The fixed filler 13 is a long fiber bundle. The long fiber bundle is made of fiber filaments wound into a ring shape or tied at both ends into a bundle shape.

[0098] The upper support body 14 and the lower support body 15 are grids made of glass fiber reinforced plastics.

[0099] The support is made of tubular support 18 and tubular support 24 made of glass fiber reinforced plastic.

[0100] The upper support body 14 and the lower support body 15 are installed on the tubular support 18 and the tubular support 24 .

[0101] The two ends of the fixed filler 13 are respectively suspended on the upper support 14 and the lower support 15 by means of an upper connecting member 16 and a lower connecting member 17. The upper connecting member 16 and the lower connecting member 17 are ropes.

[0102] The cleaning air distribution device 4 is a porous tube, arranged below the oxygen-deficient fixed filler assembly, connected to a cleaning air duct, which is also served by a tubular support 24.

[0103] The aerobic biological reaction tank 202 mainly includes an aerobic tank shell 2021 and an aerobic filler assembly 31 .

[0104] The aerobic pool housing 2021 is cylindrical and made of glass fiber reinforced plastic. A manhole is arranged on the upper part of each aerobic pool housing 2021.

[0105] An aerobic filler assembly 31 is installed in the aerobic pool shell 2021.

[0106] The aerobic filler component 31 is an aerobic fixed filler component.

[0107] The aerobic fixed filler assembly is composed of a fixed filler 13, an upper support body 14, a lower support body 15, an upper connecting piece 16, a lower connecting piece 17, an aeration device 5, a cleaning gas distribution device 4, and a bracket.

[0108] The fixed filler 13 is a long fiber bundle. The long fiber bundle is made of fiber filaments wound into a ring shape or tied at both ends into a bundle shape.

[0109] The upper support body 14 and the lower support body 15 are grids made of glass fiber reinforced plastics.

[0110] The support is made of tubular support 18 and tubular support 24 made of glass fiber reinforced plastic.

[0111] The upper support body 14 and the lower support body 15 are installed on the tubular support 18 and the tubular support 24 .

[0112] The two ends of the fixed filler 13 are respectively suspended on the upper support 14 and the lower support 15 by means of an upper connecting member 16 and a lower connecting member 17. The upper connecting member 16 and the lower connecting member 17 are ropes.

[0113] The aeration device 5 is a microporous aeration tube, which is arranged below the aerobic fixed filler assembly. The aeration device 5 is connected to the aeration air duct. The aeration air duct is also served by the tubular support 18.

[0114] The cleaning air distribution device 4 is a porous tube, which is arranged below the aerobic fixed filler assembly. The cleaning air distribution device 4 is connected to the cleaning air duct, which is also served by the tubular support 24.

[0115] The intermediate water tank 204 mainly includes: an intermediate water tank shell 2041.

[0116] The intermediate water tank shell 2041 is cylindrical barrel-shaped and made of glass fiber reinforced plastic. A manhole is arranged on the upper part of each intermediate water tank shell 2041.

[0117] The filter pool 203 mainly includes: a filter pool shell 2031 and a filter component 32.

[0118] The filter tank housing 2031 is cylindrical and made of glass fiber reinforced plastic. A manhole is arranged on the upper part of each filter tank housing 2031.

[0119] The filter assembly 32 is a fixed filter material assembly.

[0120] The fixed filter material assembly is composed of a fixed filter material 131, an upper support body 14, a lower support body 15, an upper connecting piece 16, a lower connecting piece 17, a cleaning gas distribution device 4, and a bracket.

[0121] The fixed filter material 131 is a long fiber bundle. The long fiber bundle is made of fiber filaments wound into a ring shape or tied at both ends into a bundle shape.

[0122] The upper support body 14 and the lower support body 15 are grids made of glass fiber reinforced plastics.

[0123] The support is composed of a tubular support 18 and a tubular support 24 made of glass fiber reinforced plastic.

[0124] The upper support body 14 and the lower support body 15 are installed on the tubular support 18 and the tubular support 24 .

[0125] The two ends of the fixed filter material 131 are respectively suspended on the upper support body 14 and the lower support body 15 by using an upper connecting member 16 and a lower connecting member 17. The upper connecting member 16 and the lower connecting member 17 are ropes.

[0126] The cleaning air distribution device 4 is a porous tube, which is arranged below the fixed filter material assembly. The cleaning air distribution device 4 is connected to the cleaning air duct, which is also served by the tubular support 24.

[0127] The equipment room 206 mainly includes: an equipment room housing 2061, a cleaning fan 41, an aeration fan 42, a dosing device, a power distribution cabinet, and a control cabinet. The equipment room housing 2061 is cylindrical and made of glass fiber reinforced plastic. A manhole is set on the upper part of each equipment room housing 2061.

[0128] The cleaning fan 41, aeration fan 42, dosing device, power distribution cabinet, and control cabinet are installed in the equipment room housing 2061. The pipe and valve system includes a plurality of pipes and valves, and the cleaning fan 41, aeration fan 42, and dosing device in the pretreatment tank 200, the anoxic biological reaction tank 201, the aerobic biological reaction tank 202, the intermediate water tank 204, the filter tank 203, and the equipment room 206 are connected through the pipe and valve system.

[0129] The anoxic biological reaction tank 201 and the aerobic biological reaction tank 202 are used in series, that is, the anoxic biological reaction tank 201 is connected to the aerobic biological reaction tank 202 through the guide pipe 101. When the equipment is working, the sewage flows into the pretreatment tank 200 through the water inlet pipe 6, and is sent to the anoxic biological reaction tank 201 through the lifting pump 3 and the guide pipe 100 after being treated by the coarse screen 1, the sedimentation, and the fine screen 2. The effluent of the anoxic biological reaction tank 201 enters the aerobic biological reaction tank 202 through the guide pipe 101, and the effluent of the aerobic biological reaction tank 202 enters the intermediate water tank 204 through the guide pipe 104. A part of the water in the intermediate water tank 204 flows back to the pretreatment tank 200 through the reflux pump 12, the reflux pipe 11, and the reflux valve, and the other part of the water enters the filter tank 203 through the lifting pump and the guide pipe 105. The effluent of the filter tank 203 is discharged through the outlet pipe 7.

[0130] The drainage generated by cleaning and stripping of the anoxic biological reaction tank 201, the aerobic biological reaction tank 202, and the filter tank 203 is directly discharged into the sewage inspection well through the cleaning drainage pipe 9 and enters the sewage pipe network.

[0131] To facilitate inspection and maintenance, manhole covers are provided on the ground above the pretreatment tank 200, the anoxic biological reaction tank 201, the aerobic biological reaction tank 202, the intermediate water tank 204, the filter tank 203, the equipment room 206, and the pipe and valve system.

[0132] Working principle:

[0133] First, microorganisms are inoculated on the fixed filler 13, i.e., the long fiber bundle, on the anoxic filler assembly 30 in the anoxic biological reactor 201 and the fixed filler 13, i.e., the long fiber bundle, on the aerobic filler assembly 31 in the aerobic biological reactor 202. During operation: the sewage network water enters the pretreatment tank 200 through the water inlet pipe 6, passes through the coarse grid 1, the fine grid 2, the lifting pump 3, and the guide pipe 100 into the lower part of the anoxic biological reactor 201, passes through the anoxic filler assembly 30 from bottom to top, and under the action of microorganisms, the nitrite and nitrate in the water are reduced to nitrogen and removed. The effluent from the upper part of the anoxic biological reactor 201 enters the lower part of the aerobic biological reactor 202 through the guide pipe 101, passes through the aerobic filler assembly 31 from bottom to top, and the aeration air enters the aerobic filler assembly 31 from bottom to top through the aeration device 5. Under the action of microorganisms, organic matter, ammonia nitrogen, and phosphorus substances in the water are oxidized and decomposed and removed. The effluent from the upper part of the aerobic biological reactor 202 enters the intermediate water tank 204 through the guide pipe 104, and a part of the water from the intermediate water tank 204 flows back to the pretreatment tank 200 through the reflux pump 12, the reflux pipe 11, and the reflux valve, and the other part of the water enters the filter tank 203 through the lifting pump and the guide pipe 105, and the effluent from the filter tank 203 is discharged through the outlet pipe 7. After the anoxic biological reactor 201 and the aerobic biological reactor 202 have been working for a period of time, the microorganisms are aged or too many, and need to be cleaned. During cleaning: the water inlet remains unchanged, and the cleaning air enters the anoxic biological reactor 201 or the aerobic biological reactor 202 or the lower part of the filter tank 203 through the cleaning air distribution device 4, and passes through the anoxic filler assembly 30 or the aerobic filler assembly 31 or the filter material assembly 32 from bottom to top, and the aged microorganisms or the trapped suspended matter are stripped and discharged from the anoxic biological reactor 201 or the aerobic biological reactor 202 or the filter tank 203 with the water flow through the mud discharge pipe 9 into the sewage inspection well.

[0134] See also Figure 2 , Figure 4 , Figure 6 , Figure 8The sewage treatment station is an underground sewage treatment station 40, which adopts a pretreatment + rapid biological treatment + deep treatment process. It mainly includes a pretreatment tank 200, an anoxic biological reaction tank 201, an aerobic biological reaction tank 202, an intermediate water tank 204, a filter tank 203, an equipment room 206, and a pipe valve system.

[0135] The pretreatment tank 200 mainly includes: a pretreatment tank shell 2001 , a coarse screen 1 , a fine screen 2 , and a lifting water pump 3 .

[0136] The pretreatment tank shell 2001 is cylindrical and made of glass fiber reinforced plastic. A manhole is arranged on the upper part of each pretreatment tank shell 2001. The coarse grid 1, the fine grid 2, and the lifting water pump 3 are installed in the pretreatment tank shell 2001.

[0137] The coarse grid 1 is a basket-type grid made of glass fiber reinforced plastic.

[0138] The fine grid 2 is a basket-type grid made of glass fiber reinforced plastic.

[0139] The anoxic biological reaction tank 201 mainly includes: an anoxic tank shell 2011 and an anoxic filler assembly 30 .

[0140] The anoxic pool housing 2011 is cylindrical and made of glass fiber reinforced plastic. A manhole is arranged on the upper part of each anoxic pool housing 2011.

[0141] The anoxic filler component 30 is an anoxic flow filler component.

[0142] The oxygen-deficient fluid filler assembly is mainly composed of a fluid filler 20, an upper support body 21, a lower support body 22, a porous container 23, a cleaning gas distribution device 4, and a bracket.

[0143] The flow filler 20 is in a granular form.

[0144] The upper support body 21 and the lower support body 22 are porous plates made of glass fiber reinforced plastics.

[0145] The support is composed of a tubular support 18 and a tubular support 24 made of glass fiber reinforced plastic.

[0146] The upper support body 21 and the lower support body 22 are installed on the tubular support 18 and the tubular support 24 .

[0147] The porous container 23 is made of a glass fiber reinforced plastic grid. The upper end of the porous container 23 is mounted on the upper support 21 , and the lower end is mounted on the lower support 22 . The fluid filler 20 is filled in the porous container 23 .

[0148] The cleaning air distribution device 4 is a porous tube, arranged below the oxygen-deficient fluid packing assembly, connected to a cleaning air duct, which is also served by a tubular support 24.

[0149] The aerobic biological reaction tank 202 mainly includes an aerobic tank shell 2021 and an aerobic filler assembly 31 .

[0150] The aerobic pool housing 2021 is cylindrical and made of glass fiber reinforced plastic. A manhole is arranged on the upper part of each aerobic pool housing 2021.

[0151] An aerobic filler assembly 31 is installed in the aerobic pool shell 2021.

[0152] The aerobic filler component 31 is an aerobic flow filler component.

[0153] The aerobic fluid filler assembly is mainly composed of a fluid filler 20, an upper support body 21, a lower support body 22, a porous container 23, an aeration device 5, a cleaning gas distribution device 4, and a bracket.

[0154] The flow filler 20 is in a granular form.

[0155] The upper support body 21 and the lower support body 22 are porous plates made of glass fiber reinforced plastics.

[0156] The support is composed of a tubular support 18 and a tubular support 24 made of glass fiber reinforced plastic.

[0157] The upper support body 21 and the lower support body 22 are installed on the tubular support 18 and the tubular support 24 .

[0158] The porous container 23 is made of a glass fiber reinforced plastic grid. The upper end of the porous container 23 is installed on the upper support body 21, and the lower end is installed on the lower support body 22.

[0159] The fluid filler 20 is filled in a porous container 23 .

[0160] The aeration device 5 is a microporous aeration tube, which is arranged below the aerobic fluid filler assembly. The aeration device 5 is connected to the aeration air duct. The aeration air duct is also served by the tubular support 18.

[0161] The cleaning air distribution device 4 is a porous tube, which is arranged below the aerobic flow filler assembly. The cleaning air distribution device 4 is connected to the cleaning air duct, which is also served by the tubular support 24.

[0162] The intermediate water tank 204 mainly includes: an intermediate water tank shell 2041.

[0163] The intermediate water tank shell 2041 is cylindrical barrel-shaped and made of glass fiber reinforced plastic. A manhole is arranged on the upper part of each intermediate water tank shell 2041.

[0164] The filter pool 203 mainly includes: a filter pool shell 2031 and a filter component 32.

[0165] The filter tank housing 2031 is cylindrical and made of glass fiber reinforced plastic. A manhole is arranged on the upper part of each filter tank housing 2031.

[0166] The filter assembly 32 is a flow filter material assembly.

[0167] The flow filter material assembly is mainly composed of a flow filter material 50, an upper support body 21, a lower support body 22, a porous container 23, a cleaning gas distribution device 4, and a bracket.

[0168] The flow filter material 50 is in granular form.

[0169] The upper support body 21 and the lower support body 22 are porous plates made of glass fiber reinforced plastics.

[0170] The support is composed of a tubular support 18 and a tubular support 24 made of glass fiber reinforced plastic.

[0171] The upper support body 21 and the lower support body 22 are installed on the tubular support 18 and the tubular support 24 .

[0172] The porous container 23 is made of a glass fiber reinforced plastic grid. The upper end of the porous container 23 is mounted on the upper support body 21, and the lower end is mounted on the lower support body 22. The flow filter material 50 is filled in the porous container 23.

[0173] The cleaning air distribution device 4 is a porous tube, which is arranged below the flow filter assembly. The cleaning air distribution device 4 is connected to the cleaning air duct, which is also served by the tubular support 24.

[0174] The equipment room 206 mainly includes: an equipment room housing 2061, a cleaning fan 41, an aeration fan 42, a dosing device, a power distribution cabinet, and a control cabinet. The equipment room housing 2061 is cylindrical and made of glass fiber reinforced plastic. A manhole is set on the upper part of each equipment room housing 2061.

[0175] The cleaning fan 41, aeration fan 42, dosing device, power distribution cabinet, and control cabinet are installed in the equipment room housing 2061. The pipe and valve system includes a plurality of pipes and valves, and the cleaning fan 41, aeration fan 42, and dosing device in the pretreatment tank 200, the anoxic biological reaction tank 201, the aerobic biological reaction tank 202, the intermediate water tank 204, the filter tank 203, and the equipment room 206 are connected through the pipe and valve system.

[0176] The anoxic biological reaction tank 201 and the aerobic biological reaction tank 202 are used in series, that is, the anoxic biological reaction tank 201 is connected to the aerobic biological reaction tank 202 through the guide pipe 101. When the equipment is working, the sewage flows into the pretreatment tank 200 through the water inlet pipe 6, and is sent to the anoxic biological reaction tank 201 through the lifting pump 3 and the guide pipe 100 after being treated by the coarse screen 1, the sedimentation, and the fine screen 2. The effluent of the anoxic biological reaction tank 201 enters the aerobic biological reaction tank 202 through the guide pipe 101, and the effluent of the aerobic biological reaction tank 202 enters the intermediate water tank 204 through the guide pipe 104. A part of the water in the intermediate water tank 204 flows back to the pretreatment tank 200 through the reflux pump 12, the reflux pipe 11, and the reflux valve, and the other part of the water enters the filter tank 203 through the lifting pump and the guide pipe 105. The effluent of the filter tank 203 is discharged through the outlet pipe 7.

[0177] The drainage generated by cleaning and stripping of the anoxic biological reaction tank 201, the aerobic biological reaction tank 202, and the filter tank 203 is directly discharged into the sewage inspection well through the cleaning drainage pipe 9 and enters the sewage pipe network.

[0178] To facilitate inspection and maintenance, manhole covers are provided on the ground above the pretreatment tank 200, the anoxic biological reaction tank 201, the aerobic biological reaction tank 202, the intermediate water tank 204, the filter tank 203, the equipment room 206, and the pipe and valve system.

Claims

1. A device for producing recycled water using sewage in a sewage pipe network, characterized in that: The sewage reclaimed water production equipment is an underground sewage treatment station, which mainly includes a pretreatment tank, an anoxic biological reaction tank, an aerobic biological reaction tank, an intermediate water tank, a filter tank, an equipment room, and a pipe valve system; the pretreatment tank mainly includes: a pretreatment tank shell, a coarse grid, a fine grid, and a lifting water pump; the pretreatment tank shell is cylindrical barrel-shaped or polyhedral, and is made of fiberglass or plastic or carbon steel or stainless steel; each pretreatment tank shell is provided with at least one manhole; the coarse grid, fine grid, and lifting water pump are installed in the pretreatment tank shell; The coarse grid is a basket-type grid made of glass fiber reinforced plastics, plastic, cast iron or stainless steel; The fine grid is a basket-type grid made of glass fiber reinforced plastics, plastic, cast iron or stainless steel; The anoxic biological reaction tank mainly comprises: anoxic tank shell and anoxic filler components; The anoxic pool shell is cylindrical barrel-shaped or polyhedral, and is made of glass fiber reinforced plastics, plastic, carbon steel or stainless steel; each anoxic pool shell is provided with at least one manhole; The anoxic filler assembly comprises an anoxic flowing filler assembly and an anoxic fixed filler assembly; The anoxic fluid filler assembly is mainly composed of a fluid filler, an upper support, a lower support, a porous container, a cleaning gas distribution device, and a bracket; The flow filler includes granular, fibrous, spherical, sheet-like, tubular, polyhedral hollow sphere, polyhedral hollow tube, porous hollow sphere, porous tube; The upper support and the lower support are porous plates made of stainless steel, fiberglass or plastic; The support is a pillar or a hexahedral frame or an X-shaped support made of reinforced concrete or metal or fiberglass or plastic; The upper support body and the lower support body are installed on the bracket; The porous container is made of a stainless steel mesh or a glass fiber reinforced plastic grid or a plastic grid. The upper end of the porous container is mounted on an upper support body, and the lower end is mounted on a lower support body. The fluid filler is filled in the porous container. The cleaning air distribution device is a porous tube; it is arranged below the anoxic flow filler assembly; the cleaning air distribution device is connected to the cleaning air duct; the cleaning air duct can be also used by a tubular support; The anoxic fixed filler assembly is composed of a fixed filler, an upper support body, a lower support body, an upper connecting piece, a lower connecting piece, a cleaning gas distribution device, and a bracket; The fixed filler includes a long fiber bundle and a strip-shaped object; the long fiber bundle is made of fiber filaments wound into a ring shape or tied at both ends into a bundle shape, and the strip-shaped object is a line, rope or strip made of fiber staples or fiber filaments; The upper support and the lower support are porous plates or grids made of metal or plastic or fiberglass or plastic; The support is a pillar or a hexahedral frame or an X-shaped support made of reinforced concrete or metal or fiberglass or plastic; The upper support body and the lower support body are installed on the bracket; The two ends of the fixed filler are respectively suspended on the upper support and the lower support by means of an upper connecting piece and a lower connecting piece; the upper connecting piece and the lower connecting piece are ropes or stainless steel wires or connecting rings; or one end of the fixed filler is suspended on the upper support or the lower support and the other end is free; The cleaning air distribution device is a porous tube; it is arranged below the anoxic fixed filler assembly; the cleaning air distribution device is connected to the cleaning air duct; the cleaning air duct can be doubled by a tubular support; The aerobic biological reaction tank mainly includes an aerobic tank shell and an aerobic filler component; The aerobic tank shell is cylindrical barrel-shaped or polyhedral, and is made of reinforced concrete, plastic, fiberglass or stainless steel, or is composed of a geomembrane and an inner support body; each aerobic tank shell is provided with at least one manhole; An aerobic filler assembly is installed in the aerobic pool shell; The aerobic filler assembly includes an aerobic flowing filler assembly and an aerobic fixed filler assembly; The aerobic flow filler assembly is mainly composed of a flow filler, an upper support, a lower support, a porous container, an aeration device, a cleaning gas distribution device, and a bracket; The flow filler includes granular, fibrous, spherical, sheet-like, tubular, polyhedral hollow sphere, polyhedral hollow tube, porous hollow sphere, porous tube; The upper support and the lower support are porous plates or grids made of stainless steel, fiberglass or plastic; The support is a pillar or a hexahedral frame or an X-shaped support made of reinforced concrete or metal or fiberglass or plastic; The upper support body and the lower support body are installed on the bracket; The porous container is made of a stainless steel mesh or a glass fiber reinforced plastic grid or a plastic grid, the upper end of the porous container is mounted on an upper support body, and the lower end is mounted on a lower support body; The fluid filler is filled in a porous container; The aeration device is a porous tube or a microporous aeration tube or a microporous aeration disk or a microporous aeration brick, which is arranged below the aerobic flow filler assembly; the aeration device is connected to the aeration air duct; the aeration air duct can be also served by a tubular support; The cleaning air distribution device is a porous tube; it is arranged below the aerobic flow filler assembly; the cleaning air distribution device is connected to the cleaning air duct; the cleaning air duct can be doubled by a tubular support; The aerobic fixed filler assembly is composed of a fixed filler, an upper support body, a lower support body, an upper connecting piece, a lower connecting piece, an aeration device, a cleaning gas distribution device, and a bracket; The fixed filler includes a long fiber bundle and a strip-shaped object; the long fiber bundle is made of fiber filaments wound into a ring shape or tied at both ends into a bundle shape, and the strip-shaped object is a line, rope or strip made of fiber staples or fiber filaments; The upper support and the lower support are porous plates or grids made of metal, plastic or fiberglass; The support is a pillar or a hexahedral frame or an X-shaped support made of reinforced concrete or metal or fiberglass or plastic; The upper support body and the lower support body are installed on the bracket; The two ends of the fixed filler are respectively suspended on the upper support and the lower support by means of an upper connecting piece and a lower connecting piece; the upper connecting piece and the lower connecting piece are ropes or stainless steel wires or connecting rings; or one end of the fixed filler is suspended on the upper support or the lower support and the other end is free; The aeration device is a porous tube or a microporous aeration tube or a microporous aeration disk or a microporous aeration brick, which is arranged below the aerobic fixed filler assembly; the aeration device is connected to the aeration air duct; the aeration air duct can be also served by a tubular support; The cleaning air distribution device is a porous tube; it is arranged below the aerobic fixed filler assembly; the cleaning air distribution device is connected to the cleaning air duct; the cleaning air duct can be also used by a tubular support; The intermediate water tank mainly includes: an intermediate water tank shell; The intermediate water tank shell is cylindrical barrel-shaped or polyhedral, and is made of fiberglass, plastic, carbon steel or stainless steel; each intermediate water tank shell is provided with at least one manhole; The filter pool mainly includes: a filter pool shell and a filter assembly; The filter tank shell is cylindrical barrel-shaped or polyhedral, and is made of reinforced concrete, fiberglass or plastic; each filter tank shell is provided with at least one manhole; The filter assembly includes a flow filter material assembly and a fixed filter material assembly; The flow filter material assembly is mainly composed of flow filter material, an upper support body, a lower support body, a porous container, a cleaning gas distribution device, and a bracket; The flow filter material includes granular, fibrous, spherical, sheet-like, tubular, polyhedral hollow sphere, polyhedral hollow tube, porous hollow sphere, porous tube; The upper support and the lower support are porous plates made of stainless steel, fiberglass or plastic; The support is a pillar or a hexahedral frame or an X-shaped support made of reinforced concrete or metal or fiberglass or plastic; The upper support body and the lower support body are installed on the bracket; The porous container is made of a stainless steel mesh or a glass fiber reinforced plastic grid or a plastic grid. The upper end of the porous container is mounted on an upper support body, and the lower end is mounted on a lower support body. The flowing filter material is filled in the porous container. The cleaning air distribution device is a porous tube; it is arranged below the flow filter assembly; the cleaning air distribution device is connected to the cleaning air duct; the cleaning air duct can be doubled by a tubular support; The fixed filter material assembly is composed of a fixed filter material, an upper support body, a lower support body, an upper connecting piece, a lower connecting piece, a cleaning gas distribution device, and a bracket; The fixed filter material includes a long fiber bundle and a strip-shaped object; the long fiber bundle is made of fiber filaments wound into a ring shape or tied at both ends into a bundle shape, and the strip-shaped object is a line, rope or strip made of fiber staples or fiber filaments; The upper support and the lower support are porous plates or grids made of metal, plastic or fiberglass; The support is a pillar or a hexahedral frame or an X-shaped support made of reinforced concrete or metal or fiberglass or plastic; The upper support body and the lower support body are installed on the bracket; The two ends of the fixed filter material are respectively suspended on the upper support body and the lower support body by means of an upper connecting piece and a lower connecting piece; the upper connecting piece and the lower connecting piece are ropes or stainless steel wires or connecting rings; or one end of the fixed filter material is suspended on the upper support body or the lower support body, and the other end is free; The cleaning air distribution device is a porous tube; it is arranged below the fixed filter material assembly; the cleaning air distribution device is connected to the cleaning air duct; the cleaning air duct can be also served by a tubular support; The equipment room mainly includes: equipment room housing, cleaning fan, aeration fan, dosing device, power distribution cabinet, control cabinet; The equipment room shell is cylindrical barrel-shaped or polyhedral, and is made of reinforced concrete, glass fiber reinforced plastic, plastic, carbon steel or stainless steel; each equipment room shell is provided with at least one manhole; The cleaning fan, aeration fan, dosing device, power distribution cabinet, and control cabinet equipment are installed in the equipment room housing; The pipe and valve system includes a number of pipes and valves, and the pretreatment tank, the anoxic biological reaction tank, the aerobic biological reaction tank, the intermediate water tank, the filter tank, the equipment room cleaning fan, the aeration fan, and the dosing device are connected through the pipe and valve system; The anoxic biological reaction tank and the aerobic biological reaction tank are used in series, that is, the anoxic biological reaction tank is connected to the aerobic biological reaction tank through a guide pipe; when the equipment is working, sewage flows into the pretreatment tank through the water inlet pipe, and is sent to the anoxic biological reaction tank through the lifting pump and the guide pipe after being treated by the coarse screen, the sedimentation and the fine screen. The effluent of the anoxic biological reaction tank enters the aerobic biological reaction tank through the guide pipe, and the effluent of the aerobic biological reaction tank enters the intermediate water tank. A part of the intermediate water tank flows back to the anoxic biological reaction tank through the reflux pump, the reflux pipe and the reflux valve, and the other part is discharged through the outlet pipe; The anoxic bioreactor and aerobic bioreactor are used in a multi-stage series system; that is, the outlet pipe of the first-stage anoxic bioreactor is connected to the inlet pipe of the first-stage aerobic bioreactor, the outlet pipe of the first-stage aerobic bioreactor is connected to the inlet pipe of the second-stage anoxic bioreactor, and the outlet pipe of the second-stage anoxic bioreactor is connected to the inlet pipe of the second-stage aerobic bioreactor; The drainage generated by the cleaning and defilming of the anoxic biological reaction tank, the aerobic biological reaction tank, and the filter tank can be directly discharged into the sewage inspection well and enter the sewage pipe network; it can also be discharged into the sludge pool for storage and transportation; To facilitate inspection and maintenance, manhole covers are provided on the ground above the pretreatment tank, the anoxic biological reaction tank, the aerobic biological reaction tank, the intermediate water tank, the filtration tank, the equipment room, and the pipe and valve system.

2. According to claim 1, a device for producing recycled water using sewage in a sewage pipe network is characterized in that: The anoxic biological reaction pool or aerobic biological reaction pool or filtering pool can be assembled from a number of shells and can be buried underground or placed on the ground.

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