Water distributor for anaerobic granular sludge reactor

Abstract

The utility model provides a water distributor for an anaerobic granular sludge reactor, which comprises a shell with a cavity structure; the water inlet pipe is arranged in the middle of the top of the shell; the plurality of water collecting and returning pipes are arranged on the shell, and the plurality of water collecting and returning pipes are uniformly distributed on the surface of the shell; the gas stripping separation liquid return pipe is arranged at the top of the shell, and gas stripping separation liquid generated by the reactor flows to the bottom of the reactor through the gas stripping separation liquid return pipe; the air outlet pipe is arranged at the top of the shell, and the air outlet pipe is used for discharging accumulated air generated in the water distributor. According to the utility model, the problem of sludge blockage in the water distributor and the problem of system operation disturbance caused by long-time air accumulation in the water distributor are solved, and the sewage treatment effect can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to a water distributor for an anaerobic granular sludge reactor. Background Art

[0002] The anaerobic granular sludge reactor is an efficient biological treatment system specially designed for treating high-concentration organic wastewater. The core of the system is the granular sludge cultivated inside it. These granular sludges have a large specific surface area and good sedimentation performance, and can efficiently carry out anaerobic biological reactions to convert organic matter into products such as biogas.

[0003] The water distributor is a key component in the anaerobic granular sludge reactor. Its main function is to evenly distribute the incoming water to various parts of the reactor during the anaerobic reaction, ensure the uniform distribution of the water flow, and ensure that the wastewater and granular sludge are fully contacted and mixed, thereby improving the effect and efficiency of the anaerobic reaction. The design of the water distributor directly affects the distribution and activity of the granular sludge, and then affects the treatment effect of the entire system. It is of great significance to improve the treatment effect of the reactor and prevent sludge accumulation and other problems.

[0004] In practical applications, the water distributors of high-efficiency anaerobic granular reactors represented by UASB, EGSB and IC are mostly ring-shaped and branch-shaped. In practical applications, although the ring-shaped water distributor can ensure the uniform distribution of water flow to a certain extent, due to the low hydraulic rise velocity, it often leads to the accumulation of granular sludge at the bottom of the reactor. This accumulation not only reduces the effective volume of the reactor, but also may cause local blockage of the system, affecting the uniform distribution of water flow and the treatment efficiency of sewage. The branch-shaped water distributor can provide a higher hydraulic rise velocity, which helps to reduce the accumulation of granular sludge, but due to its complex structural design and more pipe branches, the system maintenance and cleaning work is more difficult. In addition, during the operation of the branch-shaped water distributor, due to the uneven distribution of water flow, the mud and water may not be mixed sufficiently, which will affect the formation and stability of anaerobic particles and reduce the sewage treatment effect.

[0005] After searching, the Chinese utility model patent with the authorization announcement number CN212024900U discloses a three-dimensional flow water distributor for IC reactor, including a pseudo-spherical guide base, a diverter ball, a three-dimensional mixing guide vane and a conical shell, which can make the inlet water and the return water fully mixed in the water distributor; the pseudo-spherical guide base and the three-dimensional mixing guide vane are set to reduce the resistance of the water distributor and the water flow at the outlet is rotated at a high speed and flows out to the anaerobic reactor. The structure of the device is relatively complex and the processing is difficult. There is no air vent on the top of the water distributor, which easily causes air to accumulate on the top of the water distributor, thereby making the water flow in a turbulent state and causing system operation disturbance. Utility Model Content

[0006] In view of the defects in the prior art, the purpose of the utility model is to provide a water distributor for an anaerobic granular sludge reactor.

[0007] The utility model is realized by the following technical solutions:

[0008] The utility model provides a water distributor for an anaerobic granular sludge reactor, comprising:

[0009] A housing having a cavity structure;

[0010] A water inlet pipe is arranged at the middle position of the top of the shell;

[0011] A plurality of water collecting return pipes are arranged on the shell, and the plurality of water collecting return pipes are evenly distributed on the surface of the shell;

[0012] A stripping separation liquid reflux pipe is provided at the top of the shell, and the stripping separation liquid produced by the reactor flows to the bottom of the reactor through the stripping separation liquid reflux pipe;

[0013] An air outlet pipe is arranged at the top of the shell, and is used to discharge the accumulated air generated in the water distributor.

[0014] Furthermore, the shell is a conical shell.

[0015] Furthermore, the water collecting reflux pipe is connected to a variable frequency reflux pump outside the reactor.

[0016] Furthermore, a flow meter and an electric valve are provided on the pipeline of the variable frequency reflux pump, the flow meter is used to obtain the water inlet flow rate of the water collection reflux pipe, and the electric valve is used to adjust the water inlet flow rate of the water collection reflux pipe.

[0017] Furthermore, the plurality of water collecting return pipes are located in the lower middle portion of the shell and are evenly distributed on the same horizontal plane.

[0018] Furthermore, the outlet directions of the water collecting return pipes are evenly distributed clockwise or counterclockwise along the horizontal tangent direction of the shell.

[0019] Furthermore, the water collecting return pipe is fixedly connected to the shell.

[0020] Furthermore, the number of the water collecting return pipes is 4 to 6.

[0021] Furthermore, the water distributor is made of stainless steel.

[0022] Compared with the prior art, the utility model has at least one of the following beneficial effects:

[0023] 1. The water distributor provided by the utility model, by arranging a water inlet pipe and evenly distributed water collection return pipes on the shell, makes the water distribution inside the shell generate a vortex, so that the inlet water and the bottom granular sludge are evenly contacted along the vortex direction, thereby improving the sewage treatment effect. In addition, according to the detection of the anaerobic granular sludge settling performance in the anaerobic granular sludge reactor, the flow rate of the multi-point water collection return can be flexibly adjusted by installing a flow meter and an electric valve on the return pump pipeline, thereby solving the problem of sludge blockage in the water distributor. The water distributor has a simple structure and is easy to maintain the system.

[0024] 2. The water distributor provided by the utility model is provided with a gas lift separation liquid reflux pipe and an air outlet pipe on the top of the shell. The shell is a cavity structure. The long-term mud-water reaction inside the water distributor will produce gas. The reflux water generated by the gas lift separation liquid is used for water intake, and the gas inside the water distributor is compressed and discharged from the water distributor through the air outlet pipe, thereby solving the problem of long-term gas accumulation in the water distributor causing system operation disturbance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0026] Figure 1 It is a top view schematic diagram of a water distributor used in an anaerobic granular sludge reactor in one embodiment of the utility model;

[0027] Figure 2 This is a schematic diagram of the overall structure of a water distributor for an anaerobic granular sludge reactor in one embodiment of the utility model;

[0028] The corresponding reference numerals in the figure are: 1 is a shell, 2 is a water collecting reflux pipe, 3 is a water inlet pipe, 4 is a gas lift separation liquid reflux pipe, and 5 is a gas outlet pipe. DETAILED DESCRIPTION

[0029] The utility model is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the utility model, but do not limit the utility model in any form. It should be pointed out that for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the utility model. These all fall within the scope of protection of the utility model.

[0030] Reference Figure 1 and Figure 2A water distributor for an anaerobic granular sludge reactor provided by an embodiment of the utility model comprises a shell 1, a water inlet pipe 3, a plurality of water collecting return pipes 2, a gas lift separation liquid return pipe 4 and an air outlet pipe 5, wherein: the shell 1 has a cavity structure, and the cavity structure faces the bottom of the reactor; the water inlet pipe 3 is arranged at the middle position of the top of the shell 1, so that the incoming water has an effective stirring effect on the bottom of the water distributor; a plurality of water collecting return pipes 2 are arranged on the shell 1, and the plurality of water collecting return pipes 2 are evenly distributed on the surface of the shell 1, and the incoming water forms a vortex through the plurality of water collecting return pipes 2 and improves the mixing effect with the granular sludge at the bottom; the gas lift separation liquid return pipe 4 is arranged at the top of the shell 1, and the gas lift separation liquid generated by the reactor flows to the bottom of the reactor through the gas lift separation liquid return pipe 4; the air outlet pipe 5 is arranged at the top of the shell 1, and the air outlet pipe 5 is used to discharge the accumulated gas generated in the water distributor in real time.

[0031] To ensure the rising velocity of the sludge particles, in some embodiments, the housing 1 is a conical housing, the water inlet pipe 3 is arranged at the top of the conical housing, and the size of the water inlet pipe 3 can be flexibly adjusted according to the water inlet amount. In other embodiments, the housing 1 can also adopt other shapes.

[0032] In some embodiments, the water collection return pipe 2 is connected to a variable frequency return pump outside the reactor to increase the rising velocity of the sludge particles. A flow meter and an electric valve are provided on the pipeline of the variable frequency return pump. The flow meter is used to obtain the water inlet flow rate of the water collection return pipe 2, and the electric valve is used to adjust the water inlet flow rate of the water collection return pipe 2.

[0033] Multiple water collecting return pipes 2 are located in the lower middle part of the shell 1, placed horizontally, and evenly distributed on the same horizontal plane. The outlet direction of the water collecting return pipes 2 is evenly distributed clockwise or counterclockwise along the horizontal tangent direction of the shell 1, and the outlet direction of the multiple water collecting return pipes 2 is the direction in which the vortex is formed.

[0034] In some embodiments, the water collecting return pipe 2 is fixedly connected to the housing 1 to achieve a swirl effect.

[0035] The number of the water collecting and returning pipes 2 is set according to the amount of granular sludge added and the size of the reactor. In some embodiments, the number of the water collecting and returning pipes 2 is 4 to 6, so that the sewage and the bottom granular sludge are mixed more evenly.

[0036] In some embodiments, the water distributor is made of stainless steel, which has a stable structure, good corrosion resistance and a long service life.

[0037] The water distribution device of the traditional anaerobic reactor is mostly a fishbone water distribution pipe or a common perforated water distribution pipe with a short perforated pipe. The water distribution method forms an oblique downward water flow impact, which is easy to destroy the granular sludge, and the water outlet direction is irregular, resulting in uneven mixing of the sludge layer at the bottom of the reactor. The water distributor in the embodiment of the utility model is provided with an inlet pipe 3 and a uniformly distributed multi-point water collection return pipe 2 on the shell 1. After the sewage enters from the inlet pipe 3, the water distribution inside the shell 1 is generated by a plurality of water collection return pipes 2, so that the inlet water and the bottom granular sludge are uniformly contacted along the vortex direction, thereby improving the sewage treatment effect. At the same time, according to the detection of the anaerobic granular sludge settling performance in the anaerobic granular reactor, the flow rate of the multi-point water collection return can be flexibly adjusted by installing a flow meter and an electric valve on the return pump pipeline, thereby solving the technical problems of granular sludge accumulation, easy blockage and uneven mixing of mud and water in the anaerobic granular sludge reactor. The water distributor has a simple structure and can reduce the difficulty of system maintenance.

[0038] The water distributor in the embodiment of the utility model has a simple structure and is easy to process. The water distributor is connected to the anaerobic granular reactor gas lift separation liquid reflux pipe 4 and the air outlet pipe 5 at the top of the shell 1. The shell 1 is a cavity structure. The long-term mud-water reaction inside the water distributor will produce gas. The reflux water generated by the gas lift separation liquid is used to inlet water, and the gas inside the compressed water distributor is discharged from the water distributor through the air outlet pipe 5, thereby solving the problem of system operation disturbance caused by long-term gas accumulation in the water distributor and improving the water distribution effect of the water distributor.

[0039] The water distributor of the anaerobic granular sludge reactor in the above-mentioned embodiment of the utility model has a simple overall structure. By detecting and analyzing the sedimentation reaction performance of the anaerobic granular sludge, the water collection return pipe 2, the water inlet pipe 3, the gas lift separation liquid return pipe 4 and the gas outlet pipe 5 are flexibly designed, which is more conducive to constructing a circular uniformly rising flow field, solving the accumulation problem of granular sludge, ensuring that the incoming water can be evenly distributed to various parts of the reactor, promoting full contact and mixing of wastewater and granular sludge, making the mud and water mixing more uniform, avoiding the accumulation of granular sludge in the anaerobic granular sludge reactor, thereby ensuring the degradation efficiency of the anaerobic granular sludge reaction and improving the sewage treatment effect.

[0040] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various modifications or variations within the scope of the claims, which does not affect the essence of the present invention.

Claims

1. A water distributor for an anaerobic granular sludge reactor, characterized in that: include: A housing having a cavity structure; A water inlet pipe is arranged at the middle position of the top of the shell; A plurality of water collecting return pipes are arranged on the shell, and the plurality of water collecting return pipes are evenly distributed on the surface of the shell; A stripping separation liquid reflux pipe is provided at the top of the shell, and the stripping separation liquid produced by the reactor flows to the bottom of the reactor through the stripping separation liquid reflux pipe; An air outlet pipe is arranged at the top of the shell, and is used to discharge the accumulated air generated in the water distributor.

2. The water distributor for an anaerobic granular sludge reactor according to claim 1, characterized in that: The shell is a conical shell.

3. The water distributor for an anaerobic granular sludge reactor according to claim 1, characterized in that: The water collecting reflux pipe is connected to a variable frequency reflux pump outside the reactor.

4. The water distributor for an anaerobic granular sludge reactor according to claim 3, characterized in that: A flow meter and an electric valve are provided on the pipeline of the variable frequency reflux pump. The flow meter is used to obtain the water inlet flow rate of the water collection reflux pipe, and the electric valve is used to adjust the water inlet flow rate of the water collection reflux pipe.

5. The water distributor for an anaerobic granular sludge reactor according to claim 1, characterized in that: The plurality of water collecting return pipes are located in the lower middle part of the shell and are evenly distributed on the same horizontal plane.

6. The water distributor for an anaerobic granular sludge reactor according to claim 5, characterized in that: The outlet directions of the water collecting return pipes are evenly distributed clockwise or counterclockwise along the horizontal tangent direction of the shell.

7. The water distributor for an anaerobic granular sludge reactor according to claim 1, characterized in that: The water collecting return pipe is fixedly connected to the shell.

8. The water distributor for an anaerobic granular sludge reactor according to claim 1, characterized in that: The number of the water collecting return pipes is 4 to 6.

9. The water distributor for an anaerobic granular sludge reactor according to claim 1, characterized in that: The water distributor is made of stainless steel.

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