CN212982571U

CN212982571U - Membrane bioreactor

Info

Publication number: CN212982571U
Application number: CN202020903303.5U
Authority: CN
Inventors: 张长森
Original assignee: Bfuture Metal Group Ltd
Current assignee: Guowei Environmental Engineering Co.,Ltd.
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2021-04-16
Anticipated expiration: 2030-05-26

Abstract

The utility model belongs to the technical field of sewage treatment, concretely relates to membrane bioreactor realizes sewage treatment through set up aeration equipment, membrane module in biochemical pond, need not to establish in addition two heavy ponds to set up deareator in biochemical pond, separate the air in the biochemical pond liquid, and utilize the gas disturbance membrane surface of isolating, need not to let in gas separately and wash the membrane module, effectively avoided mud deposit at the membrane module, can make the membrane module have good permeability and play water quality of water.

Description

Membrane bioreactor

Technical Field

The utility model belongs to the technical field of sewage treatment, concretely relates to membrane bioreactor.

Background

The traditional mode of biochemical treatment and secondary sedimentation tank has low operation cost and general effluent quality. In order to improve the quality of the effluent water, membrane bioreactors are increasingly used in recent years. The membrane bioreactor commonly used in sewage biochemical treatment is generally a curtain type membrane, and the whole group is arranged in a biochemical pool. The aperture of the curtain membrane is small, sewage flows out through the hollow fiber membrane, so that the sludge concentration (generally 6000-10000 mg/L) in the membrane bioreactor is usually kept higher than that in the common biochemical treatment, and the design tank capacity of the biochemical area is relatively small.

In the prior art, patent document No. CN206553263U provides a membrane bioreactor, which includes a blower aeration device, a membrane separation device and a water outlet device, wherein the blower aeration device includes an aeration pipe installed at the bottom of a biochemical tank and an air blower connected with the aeration pipe through a pipeline, the membrane separation device is disposed in the biochemical tank and submerged below the water surface in the biochemical tank, and the water outlet system is connected with the membrane separation device through a pipeline. In this technical scheme, because the sludge concentration is high, curtain membrane pollution is serious, in order to prolong the life of mould, need frequent medicament washing, great gas flushing etc..

On the other hand, patent document No. CN206858264U provides an energy-saving MBR sewage treatment device, which includes a blower, a water inlet vacuum generator, a water inlet gas-water separator, a biochemical tank aerator, a water production vacuum generator, a gas water production gas-water separator, an MBR membrane, and an MBR membrane aerator, wherein the blower is connected to the water inlet vacuum generator and the water production vacuum generator through a first pipeline and a second pipeline, respectively, the water production vacuum generator is connected to the water production gas-water separator, and air separated by the water production gas-water separator scrubs the surface of the MBR membrane aerator. Therefore, it is necessary to provide an energy-saving and environment-friendly sewage treatment device.

SUMMERY OF THE UTILITY MODEL

The utility model provides a membrane bioreactor to solve the problem of sewage treatment device in the prior art.

The utility model discloses a membrane bioreactor adopts following technical scheme:

the membrane bioreactor comprises a biochemical tank, wherein an aeration device for providing oxygen is arranged in the biochemical tank, a membrane component is also arranged in the biochemical tank, and the membrane component is connected with a suction pump for discharging filtered liquid out of the biochemical tank, and is characterized in that: and a gas-water separator is also arranged in the biochemical pool, and a gas outlet of the gas-water separator is transmitted to the lower part of the membrane component through a gas collecting pipeline, so that the gas generated by the aeration device is secondarily utilized to clean the surface of the membrane component.

Furthermore, the gas collecting pipeline is provided with a residual gas discharge pipe which is suspended above the water surface and used for discharging gas, and the residual gas discharge pipe is provided with a valve used for opening and closing.

Further, a gas collecting hood used for preventing the gas transmitted by the gas-water separator from disturbing the liquid in the biochemical pool is arranged above the membrane component.

Furthermore, an exhaust hole for exhausting redundant gas is arranged at the position of the liquid level at the high position of the top of the gas-collecting hood.

Furthermore, the bottom of the biochemical pool is provided with a ring-cone-shaped sludge discharge hopper which is communicated with a sludge discharge pipeline for discharging the settled sludge out of the biochemical pool.

Furthermore, the annular conical mud discharging hopper is provided with a vertical baffle which is upwards suspended and has the function of improving the containing capacity of the annular conical mud discharging hopper.

Further, the membrane assembly is a curtain membrane.

Furthermore, an overflow weir is arranged at the top of the biochemical pool.

Furthermore, a bracket is arranged at the position between the membrane component and the aeration device in the biochemical pool, and the gas-water separator is arranged in the biochemical pool through the bracket.

The utility model has the advantages that:

the utility model provides a pair of membrane bioreactor, through set up aeration equipment in biochemical pond, sewage treatment is realized to the membrane module, need not to establish in addition two heavy ponds, and set up deareator in biochemical pond, separate the air in the biochemical pond liquid, and utilize the gas disturbance membrane surface that separates out, need not to let in gas separately and wash the membrane module, equipment investment and energy consumption have been reduced, sludge deposition has effectively been avoided at the membrane module, can make the membrane module have good permeability and play water quality of water.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a schematic structural view of a membrane bioreactor according to an embodiment of the present invention;

reference numerals:

1: a biochemical pool; 2: a membrane module; 3: a suction pump; 4: a gas-water separator; 5: a gas collection conduit; 6: an aeration pipe; 7: a water inlet pipe; 8: a residual gas discharge pipe; 9: a butterfly valve; 10: a gas-collecting hood; 11: an exhaust hole; 12: a ring-cone-shaped mud bucket; 13: a sludge discharge pipeline; 14: quickly opening the electromagnetic valve; 15: a vertical baffle; 16: an overflow weir; 17: and (4) a bracket.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention can be embodied in many other forms than those specifically described herein and similar modifications can be made by one skilled in the art without departing from the spirit and scope of the invention and, therefore, the invention is not limited to the embodiments of the substrate disclosed below.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The embodiment of the membrane bioreactor of the utility model, as shown in figure 1, a membrane bioreactor comprises a biochemical pool 1, an aeration device for providing oxygen is arranged in the biochemical pool 1, a membrane component 2 is also arranged in the biochemical pool 1, the membrane component 2 is connected with a suction pump 3 for discharging filtered liquid out of the biochemical pool 1, a gas-water separator 4 is also arranged in the biochemical pool 1, the gas outlet of the gas-water separator 4 is transmitted to the lower part of the membrane component 2 through a gas collecting pipeline 5, so that the gas generated by the aeration device is utilized for cleaning the surface of the membrane component 2, specifically, the aeration device comprises a fan arranged outside the biochemical pool 1, the fan is connected with an aeration pipeline 6 arranged at the bottom of the biochemical pool 1 through a pipeline, a water inlet pipe 7 is arranged at the bottom of the biochemical pool 1, a disturbance air hole for discharging gas is arranged on the gas collecting pipeline 5, the membrane module 2 in this embodiment is a curtain membrane.

In this embodiment, the gas collecting pipe 5 is provided with a residual gas discharging pipe 8 suspended above the water surface for discharging gas, and the residual gas discharging pipe 8 is provided with a valve for opening and closing, specifically a butterfly valve 9.

A gas-collecting hood 10 for preventing the gas transmitted by the gas-water separator 4 from disturbing the liquid in the biochemical pool 1 is arranged above the membrane component 2, and the gas-collecting hood 10 is in an umbrella-shaped structure.

And an exhaust hole 11 for exhausting redundant gas is arranged at the position of the liquid level at the high position of the top of the gas-collecting hood 10.

The bottom of the biochemical pool 1 is provided with a ring-shaped conical sludge discharge hopper 12, the ring-shaped conical sludge discharge hopper 12 is tightly attached to the bottom of the pool wall of the biochemical pool 1, the ring-shaped conical sludge discharge hopper 12 is communicated with a sludge discharge pipeline 13 for discharging settled sludge out of the biochemical pool 1, and the sludge discharge pipeline 13 is provided with a quick-opening electromagnetic valve 14 for regularly discharging sludge.

The annular cone-shaped mud discharging hopper 12 is provided with a vertical baffle 15 which is suspended upwards and used for improving the containing capacity of the annular cone-shaped mud discharging hopper 12.

The top of the biochemical pool 1 is provided with an overflow weir 16, and when the suction pump 3 is in failure or the water inflow is not matched, part of the water can flow out through the overflow weir 16. The water quality is not obviously deteriorated.

A bracket 17 is arranged in the biochemical pool 1 at a position between the membrane module 2 and the aeration device, and the gas-water separator 4 is arranged in the biochemical pool 1 through the bracket 17.

The membrane bioreactor provided by the utility model has the following advantages:

(1) a gas-water separator 4 is arranged to integrate the biochemical and secondary sedimentation tanks into one tank; the volume design of the biochemical pool 1 is basically consistent with the traditional biochemical design.

(2) The gas after aeration in the biochemical pool 1 is used as gas for flushing the curtain-type membrane, so that a special backwashing fan is omitted, and the energy consumption and equipment investment are reduced;

(3) the upper precipitation area belongs to a clear water area, the flux of the curtain type membrane is increased, and the service life is prolonged;

(4) when the curtain type membrane needs to be replaced or off-line cleaned, the upper part still has the sedimentation effect of the traditional mud-water separation, so that the great fluctuation of the effluent quality is avoided;

(5) no sludge recirculation is required. The sludge enters the biochemical reaction area again by means of self weight.

(6) The operation cost is obviously lower than that of a common membrane bioreactor, the management difficulty of the curtain type membrane is reduced, and the service life is prolonged.

It should be noted that in other embodiments of the present invention, a fixed filler, such as an elastic filler, or a suspended filler, such as a polyurethane filler, may be disposed in the biochemical tank; the biochemical pool can adopt steel equipment or a concrete structure; the gas-water separator can be made of stainless steel materials or organic materials; the gas-water separator can be operated continuously or intermittently.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The membrane bioreactor comprises a biochemical tank, wherein an aeration device for providing oxygen is arranged in the biochemical tank, a membrane component is also arranged in the biochemical tank, and the membrane component is connected with a suction pump for discharging filtered liquid out of the biochemical tank, and is characterized in that: and a gas-water separator is also arranged in the biochemical pool, and a gas outlet of the gas-water separator is transmitted to the lower part of the membrane component through a gas collecting pipeline, so that the gas generated by the aeration device is secondarily utilized to clean the surface of the membrane component.

2. A membrane bioreactor according to claim 1, wherein: the gas collecting pipeline is provided with a residual gas discharging pipe which is suspended above the water surface and used for discharging gas, and the residual gas discharging pipe is provided with a valve used for opening and closing.

3. A membrane bioreactor according to claim 2, wherein: and a gas collecting hood used for preventing the gas transmitted by the gas-water separator from disturbing the liquid in the biochemical pool is arranged above the membrane component.

4. A membrane bioreactor according to claim 3, wherein: and an exhaust hole for exhausting redundant gas is arranged at the position of the liquid level at the high position of the top of the gas-collecting hood.

5. A membrane bioreactor according to claim 4, wherein: the bottom of the biochemical pool is provided with an annular conical sludge discharge hopper which is communicated with a sludge discharge pipeline for discharging the sludge out of the biochemical pool.

6. A membrane bioreactor according to claim 5, wherein: the annular conical mud discharging hopper is provided with a vertical baffle which is upwards suspended and extended and is used for improving the containing capacity of the annular conical mud discharging hopper.

7. A membrane bioreactor according to any one of claims 1 to 6, wherein: the membrane assembly is a curtain membrane.

8. A membrane bioreactor according to claim 7, wherein: and an overflow weir is arranged at the top of the biochemical pool.

9. A membrane bioreactor according to claim 8, wherein: a bracket is arranged at the position between the membrane component and the aeration device in the biochemical tank, and the gas-water separator is arranged in the biochemical tank through the bracket.