CN207121466U - A kind of MBR sewage disposal devices with multilayer aerator - Google Patents

Abstract

The utility model relates to the technical field of sewage treatment, and provides an MBR sewage treatment equipment with a multi-layer aeration device, including a microporous aeration device layer, a gas-collecting macroporous aeration device layer, a plurality of aeration coupling inverted U Type curtain membrane module, membrane support, positioning guide rail device and water production device, microporous aeration device layer microporous aeration bubbles are small, and the contact surface with water is large, greatly improving the proportion and speed of oxygen dissolved in water, and large gas collection The hole aeration device layer can collect tiny air bubbles that are not dissolved in water to a certain amount, and when they reach a certain amount, they will emerge quickly as large air bubbles to generate a sufficient scouring force, which can wash away the membrane of the aeration coupling inverted U-shaped curtain membrane module better and faster Pollutants on the silk, the cleaning effect is good, and the use efficiency of the membrane is improved. The utility model improves the service life of the membrane and the efficiency of sewage treatment without increasing the total aeration volume, reduces energy consumption, and has simple structure, The advantages of low operating cost and strong practicability.

Description

A kind of MBR sewage treatment equipment with multi-layer aeration device

technical field

The utility model relates to the technical field of sewage treatment, in particular to an MBR sewage treatment equipment with a multi-layer aeration device.

Background technique

MBR (Membrane Bioreactor) is a new type of sewage treatment technology that combines membrane separation technology and biological treatment technology, and is widely used in the treatment of industrial and municipal sewage. Membrane biological reaction treatment technology (MBR) is also called membrane separation activated sludge method, in which the membrane bioreactor uses membrane to filter the muddy sewage in the biochemical reaction tank to realize the separation of mud and water. On the one hand, the membrane retains the microorganisms in the reaction tank, greatly increasing the concentration of activated sludge in the tank, so that the biochemical reaction of degrading sewage can be carried out more quickly and thoroughly; on the other hand, due to the high filtration accuracy of the membrane, high-quality produce water. The biggest bottleneck in the operation of membrane bioreactor (MBR) is the adhesion of microorganisms such as activated sludge, particles in sewage, colloidal particles or solute macromolecules caused by physical and chemical interaction or mechanical interaction with the membrane. Adsorption and deposition on the surface or in the membrane pores cause the membrane pore size to become smaller or clogged to cause membrane fouling. In the process of MBR sewage treatment, an aeration device must be installed in the aerobic tank. Aeration is a means to make air and water come into strong contact. In order to increase the amount of dissolved oxygen in the existing MBR, most of them use microporous aeration to achieve full contact between the liquid and oxygen in the sewage treatment tank and increase the amount of dissolved oxygen. However, the microporous aeration device has small scouring force due to small bubbles, so the effect of using microporous aeration gas to reduce membrane surface pollution is poor, which affects the service life of the membrane and the efficiency of sewage treatment.

Utility model content

As mentioned above, the purpose of this utility model is to provide a kind of MBR sewage treatment equipment with a multi-layer aeration device, aiming to solve the problem that the microporous aeration device can not be used to increase dissolved oxygen in the existing MBR sewage treatment. Effectively solve the problem of membrane surface pollution.

The utility model is realized through the following technical solutions: a MBR sewage treatment equipment with a multi-layer aeration device, including a microporous aeration device layer, a gas-collecting macroporous aeration device layer, a plurality of aeration coupling inverted U Type curtain membrane module, membrane support, positioning guide rail device and water production device, the water production device is fixed on the upper part of the membrane support, and the multiple aeration coupling inverted U-shaped curtain membrane modules are arranged side by side inside the membrane support , the microporous aeration device layer is arranged at the bottom of the membrane support, and the gas-collecting macroporous aeration device layer is arranged between the microporous aeration device and the aeration coupling inverted U-shaped curtain membrane module.

Specifically, the membrane support moves up and down along the positioning guide rail device, and is fixed in the sewage treatment tank through the positioning guide rail device.

Specifically, the microporous aeration device layer is composed of an aeration channel, an air intake main pipe and a plurality of microporous aeration air pipes, the air intake main pipe is connected to the aeration channel and the inner cavity is kept unblocked, The aeration channel is provided with an air inlet on the upper part of the membrane support, and the air inlet is connected to the external fan. One end of the multi-microporous aeration pipe is connected to the air inlet main pipe and the other end is closed. The microporous aeration tubes are arranged in parallel with each other at a certain interval, and the outer surface of the microporous aeration tubes is arranged with a plurality of micropores with openings facing upwards, and the diameter of the micropores is 0.1-5 mm.

Specifically, the gas-collecting macroporous aerator layer is located above the microporous aerator layer, and the distance between the gas-collecting macroporous aerator layer and the microporous aerator layer is 20 to 150 mm. , the aeration-coupling inverted U-shaped curtain membrane module is located above the gas-collecting macroporous aeration device layer with a distance of 20-120mm.

Specifically, the gas-gathering macropore aeration device layer is composed of a plurality of gas-gathering macropore aerator devices, and the gas-gathering macropore aerator device includes an air collection tank, a limiting outlet pipe and a macropore aeration device. The cross-section of the air collection tank is rectangular, square or circular with an open bottom and placed with the opening facing down. One end of the large-hole aeration tube is fixed in the middle of the top of the air collection tank and communicates with the peripheral space up and down. The bottom of the large-hole aeration tube is open and the water level is lower than the bottom of the gas-collecting tank. A pair of parallel grooves or superimposed convex strips are arranged on the opposite outer walls of the gas-collecting tank. The air collecting groove is superimposed through the groove and the convex strip.

Further, one end of the limiting outlet pipe is located directly below the large hole aeration pipe, the limiting outlet pipe is connected to the air collecting tank through three pairs of convex lines and grooves, and is aerated along the large hole. The axial direction of the trachea can be moved up and down to control the amount of gas collected.

Further, the position-limiting outlet pipe is tightly connected to each pair of raised bar grooves through set screws, and the side of the butt joint raised bar used to fasten the set screws is made of rubber.

Further, the inner diameter of the limiting outlet pipe is larger than the inner diameter of the large-pore aeration pipe, and a water outlet hole is opened at one end of the limiting outlet pipe, and the ratio between the inner diameter of the water outlet hole and the inner diameter of the large-pore aeration pipe is 1: 3-15, the inner diameter of the macroporous aeration pipe is 12-60 mm; the inner diameter of the water outlet hole of the limiting outlet pipe is 3-20 mm.

Further, the water production device includes a water production main pipe and a plurality of water production branch pipes. The water production main pipe is located on the upper part of the membrane support and is provided with a water outlet. The water outlet is connected to the water outlet pipe, and the water outlet pipe is connected to the water outlet pump. The water-producing branch pipes communicate with the jellyfish-producing mother pipes and are arranged in parallel with each other. Two water collection ports are respectively arranged on both sides of each water collection branch pipe, and the water collection ports are respectively connected to the water collection ports on the MBR membrane module and inside cavity remains open.

Further, an overflow port is provided on one side edge of the top of the sewage treatment tank, a mud discharge port is provided on one side of the bottom, and a sewage water inlet is provided on the other side, and the water inlet is connected to a sewage water inlet pipe, and the sewage water inlet The water pipe is provided with a water inlet pump.

Compared with the prior art, the beneficial effect of the MBR sewage treatment equipment with multi-layer aeration device provided by the utility model is that: the MBR sewage treatment equipment with multi-layer aeration device provided by the utility model includes The microporous aeration device layer, the gas-collecting macroporous aeration device layer and a plurality of aeration coupling inverted U-shaped curtain membrane modules, the microporous aeration device layer is arranged at the bottom of the membrane support and the aeration coupling inverted U-shaped curtain The membrane module is parallel to and communicated with the aeration channel. The gas-collecting macroporous aeration device layer is arranged between the microporous aeration device and the aeration coupling inverted U-shaped curtain membrane module. The microporous aeration device layer Microporous aeration has small bubbles and a large contact surface with water, which greatly increases the ratio and speed of oxygen dissolved in water without increasing the total aeration volume. A certain suitable distance is sufficient for the dissolution of microporous air bubbles and oxygen without wasting space. The layer of gas-collecting macroporous aeration device can collect micro-bubbles that are not dissolved in water to a certain amount and quickly emerge from the macroporous aeration tube as large bubbles. The large enough scouring force produced can better and faster wash away the pollutants on the membrane filaments of the aeration coupling inverted U-shaped curtain membrane module, the cleaning effect is good, and the use efficiency of the membrane is improved. Therefore, the utility model Without increasing the total aeration volume, the service life of the membrane and the efficiency of sewage treatment are improved, energy consumption is reduced, and the utility model has the advantages of simple structure, low operation cost and strong practicability.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the following will briefly introduce the accompanying drawings that are required in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only the practical For some novel embodiments, those skilled in the art can also obtain other drawings based on these drawings without any creative work.

Fig. 1 is the front view of a kind of MBR sewage treatment equipment with multi-layer aeration device provided by the utility model;

Fig. 2 is the side view of a kind of MBR sewage treatment equipment with multi-layer aeration device provided by the utility model;

Fig. 3 is a kind of structural representation of the aeration device of MBR sewage treatment equipment with multi-layer aeration device provided by the utility model;

Fig. 4 is a schematic structural diagram of a microporous aeration tube of an MBR sewage treatment equipment with a multi-layer aeration device provided by the utility model;

Fig. 5 is a front view of a gas-collecting large-hole aeration device of an MBR sewage treatment equipment with a multi-layer aeration device provided by the utility model;

Fig. 6 is another front view of the gas-collecting large-hole aeration device of the MBR sewage treatment equipment with multi-layer aeration device provided by the utility model;

Fig. 7 is a cross-sectional view of a gas-collecting large-hole aeration device of a MBR sewage treatment equipment with a multi-layer aeration device provided by the utility model;

Fig. 8 is a front view of a limit water outlet device of a MBR sewage treatment equipment with a multi-layer aeration device provided by the utility model;

Fig. 9 is a structural schematic diagram of a water production device of an MBR sewage treatment equipment with a multi-layer aeration device provided by the utility model.

Among them, the reference signs in the figure: 1, microporous aeration device layer, 2, gas-collecting macroporous aeration device device layer, 3, aeration coupling inverted U-shaped curtain membrane module stack, 4, membrane support, 5 , Water production device, 6, sewage treatment tank, 7, positioning guide rail, 8, sewage water inlet, 9, mud discharge port, 10, overflow port.

Detailed ways

The preferred implementation modes provided by the present utility model are described in detail below in conjunction with the accompanying drawings.

In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments.

It should be noted that when a component is said to be “disposed on” another component, it may be directly on the other component or indirectly on the other component. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

It should also be noted that the terms "length", "width", "top", "bottom", "front", "rear", "left", "right", "vertical", "horizontal", "top ", "bottom", "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying the Means that a device or element must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present utility model, "plurality" means two or more, unless otherwise specifically defined.

Fig. 1, Fig. 2 are the structural schematic diagrams of the MBR sewage treatment equipment fixed in the sewage pool in the embodiment of the utility model, as shown in Fig. 1, Fig. 2, a kind of MBR sewage with multi-layer aeration device provided by the utility model Treatment equipment, including microporous aeration device layer 1, gas-collecting macroporous aeration device layer 2, sewage treatment tank 6, multiple aeration coupling inverted U-shaped curtain membrane modules 3, membrane support 4, positioning guide rail device 7 The water production device 5 and the water production device 7 are fixed on the membrane support 4, a plurality of aeration coupling inverted U-shaped curtain membrane modules 3 are arranged side by side inside the membrane support 4, and the microporous aeration device layer 1 is arranged on the membrane support 4, the gas-collecting macroporous aeration device layer 2 is arranged between the microporous aeration device layer 1 and the aeration coupling inverted U-shaped curtain membrane module 3 .

The membrane support 4 moves up and down along the positioning guide rail device 7, and is fixed in the sewage treatment tank 6 through the positioning guide rail device 7. The top side edge of the sewage treatment tank 6 is provided with an overflow port 10, and the bottom side is provided with a mud discharge port 9. The other side is provided with a sewage water inlet 8, and the water inlet 8 is connected with a sewage water inlet pipe, and the sewage water inlet pipe is provided with a water inlet pump.

Fig. 3, Fig. 4 are the schematic structural diagrams of the microporous aeration device layer 1 and the gas-collecting macroporous aeration device layer 2, referring to Fig. 3 and Fig. 4, the microporous aeration device layer 1 includes an aeration channel 14, The air intake main pipe 13 and a plurality of microporous aeration air pipes 11 are composed. The air intake main pipe 13 is connected to the aeration channel 14 and the inner cavity is kept unimpeded. The aeration channel 14 is provided with an air inlet 15 on the upper part of the membrane support 4. The air inlet 15 is connected with the air intake pipe, connected with an external fan, one end of the microporous aeration pipe 11 is connected with the air intake main pipe 13, and the other end is closed, the microporous aeration pipes 11 are arranged in parallel with each other at a certain interval, The outer surface of the trachea 11 is provided with a plurality of micropores 12 with openings facing upwards, and the diameter of the micropores 12 is 0.1-5 mm.

The gas-collecting macroporous aeration device layer 2 is located above the microporous aeration device layer 1 and the distance between the gas-gathering macroporous aeration device layer 2 and the microporous aeration device layer 1 is 20-150 mm, and the aeration coupling The inverted U-shaped curtain membrane module 3 is located on the layer 2 of the gas-collecting large-hole aeration device at a distance of 20-120mm.

Figure 5-8 is a schematic diagram of the structure of the gas-gathering large-hole aeration device, see Figure 5-8, the layer of the gas-gathering macro-pore aeration device is composed of multiple gas-gathering macro-pore aeration devices 2, the gas-gathering macro-pore aeration device 2. It includes the air collection tank 211, the limiting outlet pipe 221 and the large-hole aeration pipe 214. The cross-section of the air collection tank 211 is rectangular, square or circular, the bottom is open, and the opening is placed downwards. One end of the large-hole aeration pipe 214 is fixed In the middle of the top of the gas collection tank 211 and through up and down to communicate with the peripheral space, the bottom of the large-hole aeration tube 214 is open and the horizontal plane is lower than the bottom of the gas collection tank 211, and a pair of parallel grooves are arranged on one side of the outer wall of the gas collection tank 211 213 or raised bar 212, two adjacent air-collecting grooves 211 are superimposed through the groove 213 and the raised bar 212 to form a row.

One end of the limit water outlet pipe 221 is located directly below the large hole aeration pipe 214 , and the limit water outlet pipe 213 is connected to the gas collection tank 211 through three pairs of convex strips 222 and grooves 215 .

The convex strip 222 and the groove 215 are fastened and connected by the positioning screw 23, and the side of the butt joint convex strip 222 used to fasten the positioning screw 23 is made of rubber, so that the position of the limiting outlet pipe 221 can be adjusted up and down, thereby controlling the size of the gas collection .

The inner diameter of the limit outlet pipe 221 is larger than the inner diameter of the large-hole aeration pipe 214, and one end of the limit outlet pipe 221 has a water outlet hole 223, and the ratio of the inner diameter of the water outlet hole 223 to the inner diameter of the large-hole aeration pipe 214 is 1:3-15. The inner diameter of the large-hole aeration pipe 214 is 12-60 mm, and the inner diameter of the water outlet hole 213 of the limiting water outlet pipe is 3-20 mm.

Fig. 9 is a structural schematic diagram of a water production device of an MBR sewage treatment equipment with a multi-layer aeration device provided by the utility model. As shown in Fig. 9, the water production device 5 includes a water production main pipe 51 and a plurality of water production branch pipes 53, the jellyfish pipe 51 is located at the upper part of the membrane support 4 and is provided with a water outlet 52, the water outlet 52 is connected with the water outlet pipe, the water outlet pipe is connected with the water outlet pump, and the water production branch pipe 53 is arranged under the jellyfish pipe 51, and is connected with the jellyfish pipe 51 connected to each other, arranged parallel to each other at a certain distance along the vertical direction, two water collection ports 54 are respectively arranged on both sides of each water collection branch pipe 53, and the water collection ports 54 are respectively connected to the water collection ports on the MBR membrane module 3 and the inner cavity remains open.

The key points of the design of the present utility model are: the gas-collecting macroporous aeration device layer 2 is arranged between the microporous aeration device layer 1 and the aeration coupling inverted U-shaped curtain membrane assembly 1, so that the microporous aeration device layer 1 The microporous aeration bubbles are small and have a large contact surface with water, which greatly increases the proportion and speed of oxygen dissolved in water without increasing the total aeration volume. The aeration device layer 1 is controlled at a certain appropriate distance, which is sufficient for the dissolution of microporous air bubbles and oxygen without wasting space. The aeration pipe 214 has a large enough scouring force generated by the rapid emergence of large bubbles, which can better and faster wash away the pollutants on the membrane filaments of the aeration coupling inverted U-shaped curtain membrane module 3, and the cleaning effect is good. The use efficiency of the membrane is improved and the service life of the membrane is prolonged.

Specifically, it works like this: when using the equipment for sewage treatment, the MBR sewage treatment equipment with multi-layer aeration device as shown in Figure 1 is put into the sewage treatment tank 6 through the positioning guide rail device 7, and the waste water The water inlet 8 draws sewage into the sewage treatment tank through the water inlet pump, so that the MBR membrane module 3 is located below the liquid level of the sewage treatment tank 6 . Under normal temperature and pressure, the outlet water pump generates negative pressure in the cavity of the hollow fiber membrane in the MBR membrane module 3, so that the raw water in the sewage treatment tank 6 is filtered by the hollow fiber membrane and collected into the water collection inside the MBR membrane module 3 The chamber is collected into the main water collection pipe 51 through the two water collection ports 54 in the MBR membrane module 3 through the water collection branch pipe 53, and is continuously output by the water outlet pump through the water outlet 52 of the water collection main pipe 51.

At the same time, the small-flow compressed air output by the air pump enters the inner cavity of the air intake main pipe 13 through the air inlet 15 on the aeration channel 14, and the compressed air enters the inner cavity of the microporous aeration air pipe 11 and is poured into the sewage through the air distribution micropores 12 . The gas-collecting macroporous aeration device 3 is above the microporous aeration device 1. At this time, the gas-collecting tank 211 of the gas-collecting macroporous aeration device 2 is filled with liquid, and the opening is placed downwards. Small air bubbles that are not dissolved in water It will run into the airtight space inside the air collecting tank 211, squeeze the liquid in the air collecting tank 211 airtight space and discharge the air collecting tank 211. When the lower surface of the air pipe 214 is at the horizontal level, the gas enters through the lower opening of the large-hole aeration pipe 214, and the liquid enters the large-hole aeration pipe 214 from the outlet hole 223, thereby forming a gas-liquid diversion channel, and the air pressure in the gas collection tank 211 As the bottom opening 223 of the limit outlet pipe is slightly smaller, a siphon phenomenon occurs, and the liquid at the bottom opening 223 of the limit outlet pipe 221 flows upstream and mixes with the gas in the gas collection tank 211 through the gas-liquid diversion channel Rapidly enter the sewage treatment tank with large air bubbles to aerate the aeration-coupled inverted U-shaped curtain-type MBR membrane module 3 located above to wash away the pollutants on the membrane filaments.

When the liquid level in the gas collection tank continues to rise until it reaches the level of the lower part of the large-hole aeration pipe 214, the pressure inside and outside the air pipe is balanced, and the aeration stops. Large air bubbles emerge to aerate, and so on and on. Multiple gas-collecting large-hole aeration devices 2. The air-water mixture that is aerated irregularly continuously provides water with high oxygen content to the microorganisms attached to the surface of the hollow fiber membrane to accelerate the decomposition of organic matter and other impurities in the raw water. . At the same time, under the disturbance of the exposed air-water mixture, because the middle part of the hollow fiber membrane is in a free state in the water, it can swing with the air-water flow and is not easy to break, and can be well attached to the hollow fiber membrane. The pollutants on the surface of the fiber membrane are thrown off, which improves the anti-fouling ability of the hollow fiber membrane, thereby enhancing its solid-liquid separation effect and prolonging the service life of the membrane.

The tiny air bubbles continuously entering the gas collection tank 211, under the action of liquid pressure, eject a large flow of air-water mixture, which can effectively wash away the pollutants on the surface of the hollow fiber membrane, improve the anti-pollution performance of the hollow fiber membrane, and also make the The energy consumption of the entire membrane device is reduced to a very low level, which saves input costs. Since the limiting outlet pipe 221 can move up and down along the axial direction of the large-hole aeration pipe 214, the corresponding is to adjust the size of the aeration volume, which is easy to operate and has strong practicability. Conditions adjust different pulse aeration rates to reduce energy consumption.

The above description is only a preferred embodiment of the utility model. Obviously, the implementation of the utility model patent is not limited by the above-mentioned method, as long as any modification and equivalent replacement of the method concept and technical solution of the utility model patent are adopted And improvements, etc., or directly applying the concept and technical solutions of the utility model patent to other occasions without improvement, should be included in the protection scope of the utility model.

Claims (10)

1. A kind of 1. MBR sewage disposal devices with multilayer aerator, it is characterised in that：Including microporous aeration device layer, collection Gas macropore aerator device layers, multiple aeration coupling inverted U curtain type film assemblies, membrane support, positioning guide rail device and production water dress Put, the production water installations are fixed on membrane support top, and described multiple aerations coupling inverted U curtain type film assembly is arranged side by side at film The inside of support, the microporous aeration device layer are arranged at the membrane support bottom, and the gas collection macropore aerator layer is set Between the microporous aeration device couples inverted U curtain type film assembly with aeration.
2. 2. the MBR sewage disposal devices according to claim 1 with multilayer aerator, it is characterised in that：The film Support moves up and down along positioning guide rail device, and is fixed on by the positioning guide rail device in treatment tank.
3. 3. the MBR sewage disposal devices according to claim 1 with multilayer aerator, it is characterised in that：It is described micro- Hole aerator layer is made up of aeration passage, inlet main pipe and Duo Gen micro-pore aeration tracheaes, the inlet main pipe and the aeration Passage is connected and inner chamber keeps unimpeded, and the aeration passage is provided with air inlet on membrane support top, and the air inlet is with entering Tracheae is connected, and the external blower fan of air inlet pipe, more described micropore aeration pipe one end are connected separately with the inlet main pipe One end is closed, and the micropore aeration pipe is arranged parallel to each other at certain intervals, and the micro-pore aeration tube outer surface is disposed with multiple Opening up micropore, the micropore size are 0.1~5mm.
4. 4. the MBR sewage disposal devices according to claim 1 with multilayer aerator, it is characterised in that：The collection Gas macropore aerator layer be located at the top of the microporous aeration device layer and, the gas collection macropore aerator layer with it is described micro- The distance of hole aerator layer is 20~150mm, and the aeration coupling inverted U curtain type film assembly is located at gas collection macropore aerator Distance is 20~120mm on layer.
5. 5. the MBR sewage disposal devices according to claim 1 with multilayer aerator, it is characterised in that：The collection Gas macropore aerator layer is made up of multiple gas collection macropore aerator devices, and the gas collection macropore aerator device includes collection Air drain, spacing outlet pipe and macropore aeration tube, the pneumatic trough cross section be rectangle, square or circle and bottom it is open, Opening down placement, the gas collection channel opening are located above the micropore of the micropore aeration pipe, collect gas in water, the macropore The pneumatic trough crown center is fixed in aeration tube one end and up/down perforation communicates with peripheral space, and the macropore is aerated bottom of the tube Open and horizontal plane is less than the gas collection trench bottom, be provided with before and after the pneumatic trough on relative two sides outer wall a pair it is mutual Parallel groove or superposition raised line, the adjacent pneumatic trough is overlapped by the groove, raised line.
6. 6. the MBR sewage disposal devices according to claim 5 with multilayer aerator, it is characterised in that：The limit One end of position outlet pipe is located at the underface of the macropore aeration tube, and the spacing outlet pipe is convex by three pairs with the pneumatic trough Bar is connected with groove and can moved up and down along macropore aeration tube axial direction, the size of domination set tolerance.
7. 7. the MBR sewage disposal devices according to claim 1 with multilayer aerator, it is characterised in that：The limit Position outlet pipe is fastenedly connected with described each pair raised line highlighted towards housing by set screw, and the docking raised line is described fixed for fastening The side of position screw is quality of rubber materials.
8. 8. the MBR sewage disposal devices according to claim 5 with multilayer aerator, it is characterised in that：The limit Position water outlet bore is bigger than macropore aeration bore, and described spacing outlet pipe one end is provided with apopore, the apopore internal diameter with The internal diameter of macropore aeration tube with the ratio between be 1：3~15, the internal diameter of the macropore aeration tube is 12~60mm；The spacing outlet pipe Apopore internal diameter be 3~20mm.
9. 9. the MBR sewage disposal devices according to claim 1 with multilayer aerator, it is characterised in that：The production Water installations include production jellyfish pipe and more production water branch pipes, and production jellyfish pipe is located at membrane support top and is provided with delivery port, the water outlet Mouthful be connected with outlet pipe, the outlet pipe is connected with effluent water pump, it is described produce water branch pipe with it is described produce jellyfish pipe be connected and It is arranged parallel to each other, each collection branch pipe both sides are each provided with two inlets, and the inlet is respectively on MBR membrane modules Inlet is connected and inner chamber keeps unimpeded.
10. 10. the MBR sewage disposal devices according to claim 1 with multilayer aerator, it is characterised in that：The dirt Water treating pond top side edge is provided with overfall, and bottom side is provided with mud discharging mouth, and opposite side is provided with sewage inlet, The water inlet is connected with sewage water inlet pipe, and the sewage water inlet pipe is provided with into water water pump.