CN216303399U

CN216303399U - Upflow anaerobic sludge blanket reactor and sewage treatment system

Info

Publication number: CN216303399U
Application number: CN202122636860.2U
Authority: CN
Inventors: 吴振华; 姜玉寿; 蔡高文
Original assignee: Suzhou Xingong Environment Engineering Technology Co ltd
Current assignee: Suzhou Xingong Environment Engineering Technology Co ltd
Priority date: 2021-10-28
Filing date: 2021-10-28
Publication date: 2022-04-15
Anticipated expiration: 2031-10-28

Abstract

The utility model discloses an up-flow anaerobic sludge bed reactor and a sewage treatment system, wherein the up-flow anaerobic sludge bed reactor comprises a tank body, a mud-water separator positioned above a water distributor is arranged in the tank body, the mud-water separator comprises a shell and a liquid inlet pipeline, the upper end of the liquid inlet pipeline is provided with an inlet and positioned above the shell, the lower end of the liquid inlet pipeline extends into the shell and is provided with a water distribution port, a mud blocking inclined plate for mud-water separation is also arranged in the shell, the shell is provided with a liquid outlet positioned above the mud blocking inclined plate, the liquid outlet is connected with a water outlet pipeline, the water outlet pipeline extends out of the tank body, the bottom of the shell is provided with a mud discharge port, the mud discharge port is connected with a sludge return pipeline, and the sludge return pipeline is connected with a liquid inlet of the water distributor through an external liquid supply pipeline. This scheme does not need multistage three-phase separator and whirl vapour and liquid separator, and occupation space is littleer, and mud can flow back to the sludge blanket, can avoid the mud calcification and promote the sludge amount in the reactor, makes the reactor obtain higher volume load.

Description

Upflow anaerobic sludge blanket reactor and sewage treatment system

Technical Field

The utility model relates to the field of environmental protection equipment, in particular to an upflow anaerobic sludge blanket reactor and a sewage treatment system.

Background

An upflow anaerobic sludge blanket reactor (UASB) is the most rapidly developed reactor with the most extensive application in the second generation anaerobic sludge blanket reactor. The basic function area is divided into a water inlet and distribution area, a reaction bed reaction area, a three-phase separator and a water outlet area.

The UASB has the working principle that when sewage is introduced into the bottom of the UASB anaerobic reactor, water flows upwards through a sludge bed, a sludge suspension layer, a three-phase separator and a settling zone at a certain flow velocity, inlet water is fully mixed with microorganisms in the sludge bed and the sludge suspension layer and is subjected to anaerobic decomposition, a large amount of methane is generated, sludge particles are lifted by the methane in the rising process, the sludge bed is obviously expanded, the stirring effect generated by rising of bubbles becomes violent along with the continuous increase of the gas production rate of the reactor, so that the resistance of bubbles carried in the sludge is reduced, and the gas escapes from the sludge bed to cause the surface of the sludge bed to be in a boiling and fluidized state.

Flocculent sludge with poor settling property in the reactor forms a sludge suspension layer on the upper part of the reactor under the stirring action of gas, granular sludge with good settling property is positioned on the lower part of the reactor to form a high-concentration sludge bed, a gas-water-sludge three-phase mixed solution rises into the three-phase separator along with the rising flow of water flow, the gas meets a reflecting baffle plate and then is folded to a gas collection chamber to be effectively separated and discharged, the sludge and water enter a static settling zone on the upper part, the sludge and the water are separated from each other under the action of gravity, the sludge falls back to the sludge layer, and supernatant is discharged into a subsequent treatment facility through a water outlet zone.

Therefore, as shown in the application number 201720274171.2, the multi-stage three-phase separator and the cyclone gas-liquid separator are combined to separate water, gas and mud, the structure is complex, the occupied space is large, and the volume load is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems in the prior art and provide an upflow anaerobic sludge blanket reactor and a sewage treatment system.

The purpose of the utility model is realized by the following technical scheme:

an up-flow anaerobic sludge bed reactor comprises a tank body, wherein the tank body is provided with an exhaust port positioned at the upper part of the tank body and a water distributor positioned at the lower part of the tank body and extending into a sludge bed in the tank body, a mud-water separator positioned above the water distributor is arranged in the tank body and comprises a shell and a liquid inlet pipeline, the upper end of the liquid inlet pipeline is provided with an inlet and is positioned above the shell, the lower end of the liquid inlet pipeline extends into the shell and is provided with a water distribution port, a mud-blocking inclined plate for mud-water separation is also arranged in the shell, a liquid outlet positioned above the mud-blocking inclined plate is arranged on the shell, the liquid outlet is connected with one end of a water outlet pipeline, the other end of the water outlet pipeline extends out of the tank body, the bottom of the shell is provided with a sludge discharge port, the sludge discharge port is connected with a sludge return pipeline, and the sludge return pipeline is connected with a liquid inlet of the water distributor through an external liquid supply pipeline.

Preferably, in the upflow anaerobic sludge blanket reactor, the water distributor comprises a main pipeline, the main pipeline is connected with a plurality of parallel branch pipes, and the branch pipes extend into the tank body and the part of the branch pipes located in the tank body is provided with liquid outlet holes.

Preferably, in the upflow anaerobic sludge blanket reactor, the tank body is provided with a conical collecting top which is hermetically connected with the tank body, the exhaust port is arranged at the top of the conical collecting top, and the exhaust port is connected with an exhaust pipe.

Preferably, in the upflow anaerobic sludge blanket reactor, the two sludge-water separators are arranged side by side, and sludge outlets of the two sludge-water separators are connected with the same sludge return pipeline.

Preferably, in the upflow anaerobic sludge blanket reactor, the sludge-water separator is provided with two parallel liquid inlet pipelines, and the inlet of each liquid inlet pipeline is a bell mouth.

Preferably, in the upflow anaerobic sludge blanket reactor, the housing includes a first bottom plate and a second bottom plate having a height difference, and the sludge return pipe is connected to a side wall between the first bottom plate and the second bottom plate.

Preferably, in the upflow anaerobic sludge blanket reactor, the tank body is provided with a sludge discharge pipe which is positioned below the water distributor, and the inner end surface of the sludge discharge pipe is an upward inclined surface.

Preferably, in the upflow anaerobic sludge blanket reactor, a manhole is arranged on the side wall of the tank body.

Preferably, in the upflow anaerobic sludge blanket reactor, the external liquid supply pipeline comprises a liquid conveying pipeline, a pump body is arranged on the liquid conveying pipeline, and a connection point of the sludge return pipeline and the liquid conveying pipeline is located at the front end of the pump body.

A sewage treatment system comprises the upflow anaerobic sludge blanket reactor.

The technical scheme of the utility model has the advantages that:

this scheme has cancelled the original three phase separator of reactor, change into the mud-water separator similar to the swash plate precipitation, make gas can directly rise to liquid level top and sewage separation, and can not exert an influence to the mud-water separation process, do not need multistage three phase separator and whirl vapour and liquid separator, under the prerequisite of effectively having guaranteed the three-phase separation effect, make the structure simpler, occupation space is littleer, simultaneously mud among the mud-water separator can flow back to the sludge blanket, can avoid the calcified problem of mud, and can promote the sludge amount in the reactor, make the reactor obtain higher volume load.

The utility model adopts the conical integrated top, can conveniently collect gas and fully discharge, does not need an active exhaust structure, and is simpler and more practical.

Drawings

FIG. 1 is a schematic diagram of the structure of a reactor of the present invention;

FIG. 2 is a side view of the mud-water separator of the present invention;

FIG. 3 is a top view of two mud-water separators of the present invention;

FIG. 4 is a top view of the structure of the water distributor of the present invention.

Detailed Description

Objects, advantages and features of the present invention will be illustrated and explained by the following non-limiting description of preferred embodiments. The embodiments are merely exemplary for applying the technical solutions of the present invention, and any technical solution formed by replacing or converting the equivalent thereof falls within the scope of the present invention claimed.

In the description of the schemes, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the embodiment, the operator is used as a reference, and the direction close to the operator is a proximal end, and the direction away from the operator is a distal end.

The upflow anaerobic sludge blanket reactor disclosed in the present invention is explained with reference to the accompanying drawings, as shown in fig. 1, it comprises a tank 100, and the tank 100 can be designed into a barrel shape, a rectangular parallelepiped shape, etc. as required. The tank 100 is provided with an exhaust port 110 at an upper portion thereof for exhausting air, the tank 100 is connected with a water distributor 200 for connecting an external liquid supply pipeline 300 and uniformly distributing wastewater in the tank 100, and the water distributor 200 is buried in a reaction sludge bed in the tank 100.

As shown in fig. 1-fig. 3, compared to a conventional upflow anaerobic sludge bed reactor, in this scheme, a three-phase separator inside the reactor is replaced with the mud-water separator 400 of this scheme, the mud-water separator 400 is located above the water distributor 200 and includes a housing 410 and a liquid inlet pipe 420, the upper end of the liquid inlet pipe 420 has an inlet and is located above the housing 410, the other end of the liquid inlet pipe extends into the housing 410 and has a water distribution port, a mud blocking inclined plate (not shown) for mud-water separation is further disposed in the housing 410, a liquid outlet located above the mud blocking inclined plate is disposed on the housing 410, the liquid outlet is connected to one end of a water outlet pipe 800, the other end of the water outlet pipe 800 extends out of the tank 100, a mud discharge port is disposed at the bottom of the housing 410, the mud discharge port is connected to a sludge return pipe 500, the sludge return pipe 500 is connected to a liquid inlet of the water distributor 200 through an external liquid supply pipe 300, the external liquid supply pipeline 300 comprises a liquid delivery pipeline 310, one end of the liquid delivery pipeline 310 is connected with the inlet of the water distributor 200, the other end of the liquid delivery pipeline is connected with a sewage source, a pump body 320 is arranged on the liquid delivery pipeline 310, and the connection point of the sludge return pipeline 500 and the liquid delivery pipeline 310 is positioned at the front end of the pump body 320 (the position where sewage flows in the pipeline firstly passes through is front, and the position where sewage flows out of the pipeline later is rear). Meanwhile, various valve bodies for controlling the on-off of the pipeline and devices for controlling the pressure of the pipeline are disposed on the external liquid supply pipeline 300 and the sludge return pipeline 500, and the corresponding technology is a known technology of a pipeline structure and is not described in detail.

The principle of the improved upflow anaerobic sludge blanket reactor is approximately the same as that of the original upflow anaerobic sludge blanket reactor: when sewage is introduced into the bottom of the reactor through the water distributor 200, water flows upwards through a sludge bed and a sludge suspension layer to a settling zone according to a certain flow velocity, inflow water is fully mixed and contacted with microorganisms in the sludge bed and the sludge suspension layer and is subjected to anaerobic decomposition, a large amount of methane is generated, sludge particles are lifted by the methane in the rising process, the sludge bed is expanded, the gas drives the sludge bed to flow and rise, so that part of flocculent sludge enters the shell 410 along with the sewage after reaction through the liquid inlet pipeline 420, the sludge slowly settles and falls into the bottom of the mud-water separator 400 under the blocking of the mud blocking inclined plate, and the sludge backflow pipeline connected with the bottom of the shell returns again to enter the reactor, so that heavy sludge deposition can be prevented, and the problem of sludge calcification is avoided. The supernatant in the housing flows out of the liquid outlet of the mud-water separator 400, flows out of the tank 100 through the water outlet pipe 800, and enters the next processing unit. The working principle of the mud-water separator 400 is the same as that of the inclined plate sedimentation tank, and details are not described herein, and the generated biogas rises and then accumulates at the top of the tank body 100, and enters the next collection or treatment facility through a top pipeline.

As shown in fig. 4, in order to improve the uniformity of water distribution, the water distributor 200 includes a main pipe 210, the main pipe 210 is connected to a plurality of parallel branch pipes 220, the branch pipes 220 extend into the tank 100 and are provided with liquid outlet holes on the part located in the tank 100, each branch pipe 220 extends into a pipe body from one side of the tank 100 and extends to be close to the inner wall of the other side opposite to the tank 100, and each branch pipe 220 is erected on a pipe frame 230.

As shown in the attached figures 1-3, in order to improve the separation efficiency, the sludge-water separator 400 is arranged in two and side by side, and the sludge discharge ports of the two are connected with the same sludge return pipeline. And, each of the mud-water separators 400 has two parallel inlet pipes 420, and an inlet of each of the inlet pipes 420 extends to an upper position of the tank body. The import of inlet pipe 420 is horn mouth 421, the horn mouth is four pyramid frustum forms, and the top of its first curb plate is provided with and is obtuse baffle 422 with this first curb plate, baffle 422 is close parallel with the second curb plate, the second curb plate with first curb plate sets up relatively. The end of the liquid inlet pipe 420 may extend to be close to the bottom of the shell 410, a water distribution port is formed at a pipe wall of a water distribution pipe of the liquid inlet pipe 420, an inclined plate is disposed around the water distribution pipe, the water from the water distribution pipe enters the shell 410 and flows upwards, sludge particles in the water flow are blocked by the inclined plate and settle to the bottom of the shell 410, and the supernatant continues to rise to the height of the liquid outlet and is discharged from the water outlet pipe 800 to the outside of the tank 100 for other treatment or discharge.

As shown in fig. 1, the housing 410 includes a first bottom plate 411 and a second bottom plate 422 with a height difference, and the sludge return pipe is connected to a side wall between the first bottom plate 411 and the second bottom plate, so that the sludge return pipe does not occupy a certain height space, and the device can be more compact and have a smaller height.

As shown in fig. 1, in order to facilitate the collection and discharge of biogas, the tank body 100 has a conical shaped collecting top 130 connected with the tank body 120 in a sealing manner, the gas outlet 110 is arranged at the top of the conical shaped collecting top 130, the gas outlet 110 is connected with a gas outlet pipe 600, a conical shaped top sealing structure is adopted, the gas tightness is better, and the problem of blockage of an ascending pipe and a descending pipe is avoided.

As shown in fig. 1, a sludge discharge pipe 700 is further disposed on the tank 100, the sludge discharge pipe 700 is disposed below the water distributor 200 and on a sludge pipe support 710, the inner end of the sludge discharge pipe 700 extends to the vicinity of the center of the pipe body, and the inner end surface 720 of the sludge discharge pipe is an upward inclined surface, so that sludge can enter the sludge discharge pipe 700 and be discharged.

Finally, as shown in fig. 1, a manhole 140 is provided on the sidewall of the tank body 100 for the convenience of maintenance of the equipment.

Example 2

The embodiment discloses a sewage treatment system, which comprises the upflow anaerobic sludge blanket reactor of the embodiment.

The utility model has various embodiments, and all technical solutions formed by adopting equivalent transformation or equivalent transformation are within the protection scope of the utility model.

Claims

1. Upflow anaerobic sludge blanket reactor, including a jar body, be provided with the gas vent that is located its upper portion on the jar body and be located its lower part and stretch into the water-locator in the sludge blanket of jar body, its characterized in that: the internal mud-water separator that is located the water-locator top that is provided with of jar, mud-water separator includes casing and inlet channel, inlet channel's upper end has the import and is located the top of casing, inlet channel's lower extreme stretches into in the casing and has the water distribution mouth, still set up the fender mud swash plate that is used for mud-water separation in the casing, be provided with on the casing and be located the liquid outlet of fender mud swash plate top, outlet channel's one end is connected to the liquid outlet, outlet channel's the other end extends to outside the tank, the bottom of casing is provided with the mud drain, mud return line is connected to the mud drain, mud return line passes through the inlet of outside feed liquid pipeline connection water-locator.

2. The upflow anaerobic sludge bed reactor as in claim 1, wherein: the water distributor comprises a main pipeline, the main pipeline is connected with a plurality of parallel branch pipes, and the branch pipes extend into the tank body and are positioned in the tank body, and liquid outlet holes are formed in the parts.

3. The upflow anaerobic sludge bed reactor as in claim 1, wherein: the tank body is provided with a conical integrated top in sealing connection with the tank body, the exhaust port is arranged at the top of the conical integrated top, and the exhaust port is connected with an exhaust pipe.

4. The upflow anaerobic sludge bed reactor as in claim 1, wherein: the mud-water separator is two and sets up side by side, and same mud return line is connected to their mud mouth.

5. The upflow anaerobic sludge bed reactor as in claim 1, wherein: the mud-water separator is provided with two parallel liquid inlet pipelines, and the inlets of the liquid inlet pipelines are bell mouths.

6. The upflow anaerobic sludge bed reactor as in claim 1, wherein: the shell comprises a first bottom plate and a second bottom plate with a height difference, and the sludge return pipeline is connected to the side wall between the first bottom plate and the second bottom plate.

7. The upflow anaerobic sludge bed reactor as in claim 1, wherein: the tank body is provided with a sludge discharge pipe which is positioned below the water distributor, and the inner end surface of the sludge discharge pipe is an upward inclined surface.

8. The upflow anaerobic sludge bed reactor as in claim 1, wherein: a manhole is arranged on the side wall of the tank body.

9. The upflow anaerobic sludge bed reactor as in any of claims 1-8, wherein: the external liquid supply pipeline comprises a liquid conveying pipeline, a pump body is arranged on the liquid conveying pipeline, and a connecting point of the sludge return pipeline and the liquid conveying pipeline is located at the front end of the pump body.

10. Sewage treatment system, its characterized in that: comprising an upflow anaerobic sludge blanket reactor as set forth in any of claims 1 to 9.