CN111847636A

CN111847636A - MBR aeration biomembrane pond

Info

Publication number: CN111847636A
Application number: CN202010872912.3A
Authority: CN
Inventors: 孙波; 廖泽均; 钟平; 杜勇; 汪平; 杨帅
Original assignee: Yihao Environmental Technology Co ltd
Current assignee: Yihao Environmental Technology Co ltd
Priority date: 2020-08-26
Filing date: 2020-08-26
Publication date: 2020-10-30

Abstract

The invention discloses an MBR (membrane bioreactor) aeration biological membrane tank, which comprises a tank body, wherein a membrane bioreactor and a membrane shell for containing the membrane bioreactor are arranged in the tank body, the membrane bioreactor is connected with a water inlet pipe, the tank body is connected with a circulating pipe, and the liquid outlet end of the circulating pipe is provided with a first aerator towards the membrane bioreactor; the circulating pipe is connected with a cleaning pipe, and the bottom of the shell is provided with a water outlet pipe. In this application pending sewage at first gets into membrane bioreactor and purifies, and the sewage after the purification is arranged to the membrane shell, then is discharged. In order to reduce the probability of blockage of the membrane bioreactor, the membrane bioreactor is further provided with a circulating pipe, the circulating pipe is connected with a first aerator, on one hand, oxygen can be supplied, on the other hand, the membrane bioreactor shakes in the aeration process, and the membrane bioreactor receives impact, so that sludge is not easy to attach to the membrane bioreactor or attached sludge and the like can slide down, and the probability of blockage of the membrane bioreactor is reduced.

Description

MBR aeration biomembrane pond

Technical Field

The invention relates to sewage treatment equipment, in particular to an MBR (membrane bioreactor) aeration biomembrane pond.

Background

In the field of sewage treatment and water resource recycling, MBR (Membrane bioreactor) is also called a Membrane Bio-Reactor, and is a novel water treatment technology combining a Membrane separation unit and a biological treatment unit. Because the insoluble impurities in the sewage are more, the blocking of the membrane bioreactor can often happen, so the sewage treatment equipment for reducing the blocking of the membrane bioreactor is particularly important.

Disclosure of Invention

The invention aims to provide an MBR (membrane bioreactor) aeration biomembrane pond, which solves the problem that the frequency of blockage of a bioreactor is high.

In order to solve the technical problems, the invention adopts the following technical scheme:

an MBR aeration biomembrane pond comprises a pond body, wherein a membrane bioreactor and a membrane shell for containing the membrane bioreactor are arranged in the pond body, a water inlet pipe is connected to the membrane bioreactor, a circulating pipe is connected to the pond body, and a first aerator is arranged at the liquid outlet end of the circulating pipe, which faces the membrane bioreactor; the circulating pipe is connected with a cleaning pipe, and a water outlet pipe is arranged at the bottom of the shell.

Preferably, the cleaning pipe is communicated with the water outlet pipe through a connecting pipe.

Preferably, the circulating pipe is further connected with an aeration pipe, the aeration pipe is provided with a second aerator, and the second aerator is positioned in the tank body and outside the membrane shell.

Preferably, the first aerator and/or the second aerator is a rotary aerator, the rotary aerator comprises an outer shell and an inner shell which is positioned in the outer shell and can rotate around the axis of the rotary aerator, a liquid phase throwing port is arranged at the position, away from the axis, of the inner shell, a liquid inlet pipe is arranged on the axis, and the liquid inlet end of the liquid inlet pipe extends out of the outer shell and is movably connected with the outer shell; the shell is provided with a gas inlet, a mixture outlet and a scattering rod, wherein the mixture outlet and the scattering rod are arranged at the position corresponding to the liquid phase throwing-out port.

Preferably, a rotational flow plate capable of driving the inner shell to rotate is fixedly arranged in the inner shell.

Preferably, the housing comprises a first half shell and a second half shell, the first half shell and the second half shell are fixed through a plurality of scattering rods, and a mixture outlet is formed between every two adjacent scattering rods.

Preferably, the gas inlet is provided on the housing at a position opposite to the liquid inlet pipe.

Preferably, a liquid blocking ring is fixed close to the edge of the second half shell, and an inner shell of the liquid blocking ring is coaxially arranged and is gradually close to the second half shell along the discharging direction of the mixed material.

Preferably, the inner shell comprises a first half shell and a second half shell, the first half shell is located on one side of the liquid phase throwing-out opening close to the liquid inlet pipe, the second half shell is located on one side of the liquid phase throwing-out opening far away from the liquid inlet pipe, and the rotational flow plate is fixed on the first half shell.

Preferably, the second half shell is provided with bumps for scattering the liquid phase.

Compared with the prior art, the invention has the beneficial effects of at least one of the following:

in this application pending sewage at first gets into membrane bioreactor and purifies, and the sewage after the purification is arranged to the membrane shell, then is discharged. In order to reduce the probability of blockage of the membrane bioreactor, the membrane bioreactor is further provided with a circulating pipe, the circulating pipe is connected with a first aerator, on one hand, oxygen can be supplied, on the other hand, the membrane bioreactor shakes in the aeration process, and the membrane bioreactor receives impact, so that sludge is not easy to attach to the membrane bioreactor or attached sludge and the like can slide down, and the probability of blockage of the membrane bioreactor is reduced.

Because the sewage contains insoluble impurities, when the membrane bioreactor is blocked or is close to the blockage, the effect of washing the membrane bioreactor by utilizing the sewage is possibly poor, at the moment, the valve on the cleaning pipe can be opened, the valve at the inlet end of the circulating pipe is closed, and the membrane bioreactor is cleaned by using clean water, so that the cleaning effect is improved.

Drawings

FIG. 1 is a schematic view of the structure of the present invention.

Fig. 2 is a schematic structural view of the rotary aerator of the present invention.

FIG. 3 is a schematic view of the structure of the swirl plate of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The embodiment provides an MBR (membrane bioreactor) aeration biomembrane pond, as shown in figure 1, which comprises a pond body 1, wherein a membrane bioreactor 2 and a membrane shell 3 for containing the membrane bioreactor 2 are arranged in the pond body 1, the membrane bioreactor 2 is connected with a water inlet pipe 21, the pond body 1 is connected with a circulating pipe 4, and the liquid outlet end of the circulating pipe 4 is provided with a first aerator 5 facing the membrane bioreactor 2; the circulating pipe 4 is connected with a cleaning pipe 41, and the bottom of the membrane shell 3 is provided with a water outlet pipe 31.

In the embodiment, the sewage to be treated firstly enters the membrane bioreactor 2 for purification, and the purified sewage is discharged to the membrane shell 3 and then discharged. In order to reduce the probability of blockage of the membrane bioreactor 2, the circulating pipe 4 is further arranged, the circulating pipe 4 is connected with the first aerator 5, on one hand, oxygen can be supplied, on the other hand, the membrane bioreactor 2 is shaken in the aeration process, and the membrane bioreactor 2 is impacted, so that sludge is not easy to adhere to the membrane bioreactor 2 or the adhered sludge and the like can slide off, and the probability of blockage of the membrane bioreactor 2 is reduced.

Because the sewage contains insoluble impurities, when the membrane bioreactor 2 is blocked or is close to being blocked, the effect of flushing the membrane bioreactor 2 by utilizing the sewage is possibly poor, at the moment, the valve on the cleaning pipe 41 can be opened, the valve at the inlet end of the circulating pipe 4 is closed, and the membrane bioreactor 2 is cleaned by using clear water, so that the cleaning effect is improved.

In this embodiment, the cleaning pipe 41 is communicated with the water outlet pipe 31 through a connecting pipe 42.

When cleaning membrane bioreactor 2, perhaps according to the particular case of sewage, to wherein put into the cleaner, after having put into the washing medicament, in order to reduce the waste of washing medicament, can close the valve on outlet pipe 31, open the valve on the connecting pipe 42 for the continuous washing membrane bioreactor 2 of liquid that has dissolved the washing medicament.

In this embodiment, the circulating pipe 4 is further connected with an aeration pipe, the aeration pipe is provided with a second aerator 6, and the second aerator 6 is located inside the tank body 1 and outside the membrane shell 3.

In this embodiment, in order to increase the dissolved oxygen in the sewage, a second aerator 6 is further disposed in the tank body 1 to provide sufficient oxygen for the purification of the sewage.

In this embodiment, the first aerator 5 and/or the second aerator 6 are rotary aerators, each rotary aerator includes an outer shell 71 and an inner shell 72 located in the outer shell 71 and capable of rotating around its own axis, a liquid phase throwing port 73 is provided at a position of the inner shell 72 away from the axis, a liquid inlet pipe 74 is provided on the axis, and a liquid inlet end of the liquid inlet pipe 74 extends out of the outer shell 71 and is movably connected with the outer shell 71; the housing 71 is provided with an air inlet 75, and a mixture outlet and a breaking rod 76 which are arranged at the position corresponding to the liquid phase throwing outlet 73, as shown in fig. 2.

When the rotary aerator in the embodiment works, liquid enters from the liquid inlet pipe 74, is accelerated to leave from the liquid phase throwing outlet 73 after impacting on the inner shell 72, and in the process that the liquid leaves from the liquid phase throwing outlet 73, a micro negative pressure is formed between the inner shell 72 and the outer shell 71, so that gas enters between the inner shell 72 and the outer shell 71 from the gas inlet 75, the liquid meets a gas phase after leaving the liquid phase throwing outlet 73, then the liquid phase and the gas-liquid phase collide with the scattering rod 76, the liquid phase is collided into fine particles, the solid-liquid contact area is increased, the dissolution of the gas phase in the liquid phase is improved, and then the gas-liquid mixture leaves from the mixture outlet 71.

The inner casing 72 of this embodiment can rotate relative to the outer casing 71 to provide a centrifugal force to the liquid, so that the liquid can be accelerated to leave the inner casing 72 and quickly impact on the scattering rods 76, and the scattering effect is better.

The breaking rod 76 in this embodiment may be in the form of a sheet, a plate, a rod, a column, or even a net, and preferably, when the breaking rod 76 is in the form of a net, the liquid phase is better dispersed, and the gas phase is better dissolved in the solid phase. The liquid inlet pipe 74 and the outer shell 71 are connected through a bearing, so that the liquid inlet pipe 74 does not have an obstruction function during the relative rotation of the inner shell 72 and the outer shell 71. In addition, if the liquid source is relatively fixed in order to allow the inner casing 72 to rotate smoothly, a bearing should be provided between the liquid inlet pipe 74 and the liquid pipe or between the liquid inlet pipe 74 and a supply pipe connected to the liquid source.

In this embodiment, a rotational flow plate 77 capable of driving the inner shell 72 to rotate is fixedly disposed in the inner shell 72, as shown in fig. 3.

The existence of whirl board 77 makes liquid when getting into inner shell 72, can give whirl board 77 a driving force, and promotion whirl board 77 takes place to rotate, because fixed connection between whirl board 77 and the inner shell 72, so inner shell 72 can be driven rotatoryly by whirl board 77.

The existence of the rotational flow plate 77 can replace a motor, save power equipment and save energy consumption. And the presence of the swirl plate 77 causes the liquid phase to receive a force away from the axis which facilitates the acceleration of the liquid exiting from the liquid phase slinger 73.

In this embodiment, the casing 71 includes a first half casing and a second half casing, the first half casing and the second half casing are fixed by a plurality of scattering rods 76, and a mixture outlet is formed between adjacent scattering rods 76.

The distance between the breaking bars 76 can be set as desired so that the liquid phase can be collided with the breaking bars 76 and then exit from the mix outlet no matter where the liquid phase slinger outlet 73 rotates.

In this embodiment, the gas inlet 75 is provided on the outer shell 71 at a position opposite to the liquid inlet pipe 74, so that the gas can be relatively uniformly dispersed between the outer shell 71 and the inner shell 72.

In this embodiment, a liquid-blocking ring 78 is fixed near the edge of the second half shell, and the inner shell 72 of the liquid-blocking ring 78 is coaxially arranged and gradually approaches the second half shell along the discharging direction of the mixed material.

When the rotary aerator is horizontally arranged, liquid may leave from the gas inlet 75, and in order to reduce the amount of liquid leaving from the gas inlet 75, a liquid-retaining ring 78 is provided, the height of the upper end of the liquid-retaining ring 78 being higher than the height of the top end of the second half shell, so that the accumulated liquid can leave from the mix outlet.

In this embodiment, the inner shell 72 includes a first half shell and a second half shell, the first half shell is located one side that the liquid phase flail outlet 73 is close to the liquid inlet pipe 74, the second half shell is located one side that the liquid phase flail outlet 73 is kept away from the liquid inlet pipe 74, the whirl plate 77 is fixed on the first half shell.

The whirl plate 77 is located half first shell, and liquid is through whirl plate 77, gives whirl plate 77 thrust for whirl plate 77 drives the inner shell 72 rotatory, simultaneously, passes whirl plate 77 back when liquid, strikes half second shell on, then throws out from liquid phase flail outlet 73, and liquid drop dispersion effect is better relatively.

In this embodiment, be provided with the bump that is used for breaking up the liquid phase on the second half shell, the bump is the toper and spreads all over the internal surface of second half shell, and the liquid drop dispersion effect is relatively better.

Although the invention has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure. More specifically, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.

Claims

1. The utility model provides a MBR aeration biomembrane pond, includes cell body (1), its characterized in that: a membrane bioreactor (2) and a membrane shell (3) used for containing the membrane bioreactor (2) are arranged in the tank body (1), a water inlet pipe (21) is connected to the membrane bioreactor (2), a circulating pipe (4) is connected to the tank body (1), and a first aerator (5) is arranged at the liquid outlet end of the circulating pipe (4) towards the membrane bioreactor (2); the circulating pipe (4) is connected with a cleaning pipe (41), and a water outlet pipe (31) is arranged at the bottom of the membrane shell (3).

2. The MBR aerated biofilm tank of claim 1, wherein the cleaning pipe (41) is communicated with the water outlet pipe (31) through a connecting pipe (42).

3. The MBR aerated biofilm tank of claim 1, wherein the circulating pipe (4) is further connected with an aerator pipe, the aerator pipe is provided with a second aerator (6), and the second aerator (6) is positioned inside the tank body (1) and outside the membrane shell (3).

4. The MBR aerated biofilm tank of claim 1, wherein the first aerator (5) and/or the second aerator (6) is a rotary aerator, the rotary aerator comprises an outer shell (71) and an inner shell (72) which is positioned in the outer shell (71) and can rotate around the axis of the rotary aerator, a liquid phase throwing outlet (73) is arranged at the position of the inner shell (72) far away from the axis, a liquid inlet pipe (74) is arranged on the axis, and the liquid inlet end of the liquid inlet pipe (74) extends out of the outer shell (71) and is movably connected with the outer shell (71); the shell (71) is provided with a gas inlet (75), and a mixture outlet and a breaking rod (76) which are arranged at the position corresponding to the liquid phase throwing outlet (73).

5. The MBR aerated biofilm tank of claim 4, wherein a swirl plate (77) capable of rotating the inner shell (72) is fixedly arranged in the inner shell (72).

6. The MBR aerated biofilm tank of claim 4, wherein the housing (71) comprises a first half shell and a second half shell, the first half shell and the second half shell are fixed by a plurality of break-up rods (76), and a mixture outlet is formed between adjacent break-up rods (76).

7. The MBR-aerated biofilm tank of claim 4, wherein the gas inlet (75) is provided on the housing (71) opposite the liquid inlet pipe (74).

8. The MBR-aerated biofilm tank of claim 6, wherein a liquid baffle ring (78) is fixed near the edge of the second half shell, the liquid baffle ring (78) is arranged coaxially with the inner shell (72) and is gradually close to the second half shell along the discharging direction of the mixed material.

9. The MBR-aerated biofilm tank of claim 5, wherein the inner shell (72) comprises a first half shell and a second half shell, the first half shell is positioned on one side of the liquid phase dump outlet (73) close to the liquid inlet pipe (74), the second half shell is positioned on one side of the liquid phase dump outlet (73) far away from the liquid inlet pipe (74), and the swirl plate (77) is fixed on the first half shell.

10. The MBR aerated biofilm tank of claim 9, wherein the second half shell is provided with protrusions for breaking up liquid phase.