Segmented water inlet MBBR (moving bed biofilm reactor) sewage treatment system

Abstract

The utility model discloses a sectional water inlet MBBR (Moving Bed Biofilm Reactor) sewage treatment system and relates to the technical field of sewage treatment. The MBBR sewage treatment system can solve the technical problems that the MBBR sewage treatment system is easy to block and the biological filler flows back. The device comprises a reaction tank, a microporous aeration device, an interception device, a self-cleaning device and an automatic control device, a segmented water inlet pipe is arranged at the top of the reaction tank and is divided into a first segmented water inlet pipe and a second segmented water inlet pipe, a water outlet of the first segmented water inlet pipe is communicated into the interception device, and a water outlet of the second segmented water inlet pipe is communicated into the self-cleaning device. And a water outlet of the second sectional water inlet pipe is communicated into the reaction tank outside the intercepting device. According to the utility model, the intercepting device is arranged in the reaction tank, and a segmented water inlet mode is adopted, so that the fluidized operation of water flow and biological filler is facilitated, the full contact of activated sludge / biological membrane and pollutants is facilitated, and the sewage treatment effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a segmented water inlet MBBR sewage treatment system. Background Art

[0002] MBBR technology is widely used in the sewage treatment industry due to its advantages such as small footprint, high degradation efficiency, low operating cost and convenient maintenance. After decades of development, MBBR technology has gradually matured and become a popular technology in the field of water treatment. However, in actual application, MBBR systems still have many problems, such as biological filler backflow and MBBR system blockage, which affect the safety of equipment and process operation.

[0003] The safe operation of MBBR is affected by many factors. For example, sudden increase in water volume, power failure of equipment, abnormal gas outage, etc. will cause MBBR process blockage, filler reflux and other problems, which seriously affect the service life of the equipment, and cause process shutdown, increasing the operation and maintenance costs of the sewage treatment plant. In recent years, researchers have continuously modified MBBR equipment, and by optimizing the water inlet system and aeration system, to a certain extent, reduced the system blockage and filler reflux problems, but failed to fundamentally solve such problems. Therefore, it is still necessary to find practical methods to completely solve the blockage and biological filler reflux problems in MBBR sewage treatment systems. Utility Model Content

[0004] The utility model aims to provide a segmented water inlet MBBR sewage treatment system, which can solve the technical problems of easy blockage and reflux of biological fillers in the MBBR sewage treatment system.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A segmented water inlet MBBR sewage treatment system, comprising a reaction tank, a microporous aeration device, an interception device, a self-cleaning device and an automatic control device, wherein the interception device is fixed inside the reaction tank, and a flow promoter is arranged in the area between the interception device and the reaction tank;

[0007] The shape of the interception device is the same as that of the reaction pool, the interception device is filled with biological fillers, and the side of the interception device is provided with a plurality of small holes for intercepting the biological fillers;

[0008] The self-cleaning device is arranged at the bottom of the intercepting device; the microporous aeration device is arranged at the bottom of the reaction tank;

[0009] A segmented water inlet pipe is arranged on the top of the reaction tank, and the segmented water inlet pipe is divided into a first segmented water inlet pipe and a second segmented water inlet pipe, the water outlet of the first segmented water inlet pipe leads into the interception device, and the water outlet of the second segmented water inlet pipe leads into the reaction tank outside the interception device; a water outlet pipe is arranged at the bottom of the reaction tank;

[0010] The automatic control device is used to control the water inlet ratio of the first segment water inlet pipe and the second segment water inlet pipe.

[0011] Electric regulating valves are respectively arranged on the first segment water inlet pipe and the second segment water inlet pipe. The automatic control device is connected to a liquid level gauge. The liquid level gauge is located inside the interception device and in the reaction tank outside the interception device. The liquid level height inside the interception device and between the reaction tank and the interception device is collected to the automatic control device through the liquid level gauge. The automatic control device adjusts the water inlet ratio by adjusting the electric regulating valve.

[0012] In the above-mentioned segmented water inlet MBBR sewage treatment system, the self-cleaning device is kept in communication with the external air source.

[0013] In the above-mentioned segmented water inlet MBBR sewage treatment system, the volume of the interception device accounts for 20-80% of the volume of the reaction tank, the filling ratio of the biological filler in the interception device is ≤65%; the aperture of the small holes on the side of the interception device is smaller than the diameter of the biological filler.

[0014] In the above-mentioned segmented water inlet MBBR sewage treatment system, the distance between the self-cleaning device and the bottom of the reaction tank is 0.5-1m; the microporous aeration device includes aeration pipes, and the aeration pipes are distributed in the interception device and the reaction tank outside the interception device.

[0015] In the above-mentioned segmented water inlet MBBR sewage treatment system, a plurality of flow promoters are provided, and the flow promoting directions of the flow promoters are kept consistent, and all of them are in clockwise flow promoting mode or counterclockwise flow promoting mode.

[0016] In the above-mentioned segmented water inlet MBBR sewage treatment system, the water inlet volume ratio of the second segmented water inlet pipe to the first segmented water inlet pipe is 0.2-0.8:1.

[0017] In the above-mentioned segmented water inlet MBBR sewage treatment system, the reaction tank includes a tank body, the tank body is an elliptical three-dimensional structure, the interception device includes an interception net body, the interception net body is also an elliptical three-dimensional structure, and the side of the interception net body is fixed to the tank body through a supporting structure.

[0018] Compared with the prior art, the utility model brings the following beneficial technical effects:

[0019] The utility model proposes a segmented water inlet MBBR sewage treatment system, which sets an interception device in the reaction tank and adopts a segmented water inlet method, which is beneficial to the fluidization operation of water flow and biological filler, facilitates the full contact between activated sludge / biofilm and pollutants, improves the sewage treatment effect, and solves the technical problems of biological filler accumulation and reflux.

[0020] Specifically, in the segmented water inlet, electric regulating valves are provided on the first segmented water inlet pipe and the second segmented water inlet pipe. The water inlet ratio is adjusted by adjusting the electric regulating valves through the automatic control device. When the MBBR sewage treatment system encounters a gas outage or a sudden increase in water volume, the MBBR sewage treatment system can automatically adjust the water inlet ratio by reducing or stopping the water inlet on the inside of the interception device and increasing the water inlet on the outside of the interception device, thereby effectively reducing the operating pressure of the interception device and preventing the small holes on the side of the interception device from being blocked. The interception device can intercept the biological filler inside the device to prevent it from being lost. At the same time, the sewage can freely enter and exit the interception device through the small holes, which is convenient for the sewage to fully contact with the biological filler and improves the mass transfer efficiency.

[0021] The water inlet of MBBR sewage treatment system is pipeline-type, located at the top of the reaction tank, which can effectively prevent the backflow of biological filler. There is no need to set up anti-backflow device, which simplifies the system structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described below in conjunction with the accompanying drawings:

[0023] Figure 1 This is a front view of a segmented water inlet MBBR sewage treatment system of the utility model;

[0024] Figure 2 It is a top view of a segmented water inlet MBBR sewage treatment system of the utility model;

[0025] Figure 3 It is a front view of the intercepting device and the self-cleaning device of the utility model;

[0026] In the figure:

[0027] 1. Segmented water inlet pipe, 2. Reaction tank, 3. Flow promoter, 4. Microporous aeration device, 5. Interception device, 6. Biological filler, 7. Self-cleaning device, 8. Water outlet pipe, 9. Automatic control device, 10. Electric regulating valve, 11. Liquid level meter. DETAILED DESCRIPTION

[0028] The utility model proposes a segmented water inlet MBBR sewage treatment system. In order to make the advantages and technical solutions of the utility model clearer and more specific, the utility model is further described below in conjunction with specific embodiments.

[0029] As a major innovation of the utility model, by setting an interception device in the reaction tank and cooperating with the staged water inlet method, the blockage and biological filler backflow problems existing in the MBBR sewage treatment system in the prior art can be solved.

[0030] Combination Figure 1 and Figure 2 As shown, the utility model is a segmented water inlet MBBR sewage treatment system, including a segmented water inlet pipe 1, a reaction tank 2, a flow promoter 3, a microporous aeration device 4, an interception device 5, a biological filler 6, a self-cleaning device 7, a water outlet pipe 8, an automatic control device 9, an electric regulating valve 10 and a liquid level meter 11.

[0031] Among them, a segmented water inlet pipe 1 is arranged on the top of the reaction tank 2, and the segmented water inlet pipe includes a first segmented water inlet pipe and a second segmented water inlet pipe, and the two have the same structure, except that the water outlet position is different, the outlet of the first segmented water inlet pipe leads to the interception device 5, and the outlet of the second segmented water inlet pipe leads to the reaction tank outside the interception device; an outlet pipe is arranged at the bottom of the reaction tank. The purpose of arranging the segmented water inlet pipe in this way is that when the MBBR sewage treatment system encounters a gas outage or a sudden increase in water volume, the MBBR sewage treatment system can automatically adjust the water inlet ratio, by reducing or stopping the water inlet inside the interception device (i.e. reducing or stopping the water inlet of the first segmented water inlet pipe), increasing the water inlet outside the interception system (i.e. increasing the water inlet of the second segmented water inlet pipe), effectively reducing the operating pressure of the interception device and preventing the small holes of the interception device from being blocked.

[0032] In order to realize the automation of the regulation of the first segmented water inlet pipe and the second segmented water inlet pipe, it is preferred to set an electric regulating valve 10 on both the first segmented water inlet pipe and the second segmented water inlet pipe, and the electric regulating valve 10 is controlled by the automatic control device 9, that is, the electric regulating valve 10 is connected to the automatic control device 9. In addition, the liquid level meter is also connected to the automatic control device 9, and the automatic control device is used to control the water inlet ratio of the first segmented water inlet pipe and the second segmented water inlet pipe. Preferably, the water inlet volume ratio of the second segmented water inlet pipe to the first segmented water inlet pipe is 0.2 to 0.8:1. Such a water inlet ratio can ensure the normal operation of the MBBR sewage treatment system and improve the sewage treatment effect.

[0033] The liquid level meter 9 is located in the interception device. The liquid level height inside and outside the interception device is collected by the liquid level meter to the automatic control device, and then the automatic control device is used to control the water inlet ratio of the first segment water inlet pipe and the second segment water inlet pipe.

[0034] A plurality of flowmakers are arranged in the area between the reaction tank and the interception device. The flowmakers have the same flow direction and are set to push the flow clockwise or counterclockwise. The structure of the flowmaker can be realized by referring to the existing technology.

[0035] The above-mentioned reaction pool and interception device have the same structure. For example, the reaction pool includes a pool body, which is preferably an elliptical three-dimensional structure. The pool body is made of concrete or steel. The interception device includes an interception net body, which is also an elliptical three-dimensional structure. The side of the interception net body is fixed to the pool body through a supporting structure, and no small holes are set at the bottom of the interception net body; the small holes located on the side of the interception net body can be arranged in a mesh structure, and the aperture of each small hole is smaller than the diameter of the biological filler.

[0036] The interception device 5 is fixed to the bottom of the reaction tank 2, and a supporting structure is provided on the side wall. The self-cleaning device 7 is located inside the interception device, surrounds the interception device, and is connected to an external air source. The interception device can be automatically cleaned by the self-cleaning device. The volume of the interception device 5 accounts for 20 to 80% of the volume of the reaction tank 2, and the filling ratio of the biological filler inside the interception device is less than 65%.

[0037] Further, such as Figure 3 As shown, the self-cleaning device 7 is located at the bottom of the intercepting device 5, fixed to the bottom of the reaction tank 2, 1m away from the bottom of the tank, and has a hole with a size of 7mm.

[0038] The microporous aeration device 4 at the bottom of the reaction tank includes aeration pipes, which are distributed inside and outside the interception device 5. The microporous aeration device 4 is connected to an external air source, wherein the structure of the microporous aeration device can be realized by referring to the existing technology.

[0039] The operation method of the above-mentioned segmented water inlet MBBR sewage treatment system is described as follows.

[0040] A method for operating a segmented water inlet MBBR sewage treatment system comprises the following steps:

[0041] The first step is to set the volume percentage of the interception device 5 to 40% of the volume of the reaction tank;

[0042] The second step is to input the opening of the electric regulating valve 10 through the automatic control device 9, and the sewage enters the reaction tank 2 and the interception device 5 through the first segmented water inlet pipe and the second segmented water inlet pipe. When the liquid level reaches a certain height, the fan is turned on to put the microporous aeration device 4 and the self-cleaning device 7 in the aeration state, and the biological filler is added to the interception device 5. The flow pusher 3 is started to put the sewage in a flowing state. When the indicators of pollutants such as (CODcr, ammonia nitrogen, etc.) meet the discharge standards, the effluent is discharged to the outside of the system through the outlet pipe 8.

[0043] Step 3: When the liquid level meter 11 detects the difference between the liquid levels inside and outside the interception device 5, the automatic control device 9 outputs a command to automatically adjust the opening of the electric regulating valve 10. The opening of the electric regulating valve outside the interception device is adjusted to the maximum, and the opening of the electric regulating valve inside the interception device is reduced or closed, so that the MBBR sewage treatment system can operate continuously and normally.

[0044] It should be noted that the above-mentioned segmented water inlet MBBR sewage treatment system can not only be used in an aerobic system, but also can be provided with anoxic function by not setting up a microporous aeration device, and can also be used in series combination.

[0045] In summary, the segmented water inlet MBBR sewage treatment system proposed in the utility model can effectively avoid the biological filler from clogging the interception device and prevent the biological filler from flowing back. Even if the system is in abnormal conditions such as gas outage or water volume increases instantly, the normal operation of the system can still be guaranteed, thereby extending the service life of the MBBR equipment.

[0046] The parts not described in the present invention can be realized by adopting or drawing on the existing technology.

[0047] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A segmented water inlet MBBR sewage treatment system, comprising a reaction tank, a microporous aeration device, an interception device, a self-cleaning device and an automatic control device, characterized in that: The interception device is fixed inside the reaction tank, and a flow promoter is arranged in the area between the interception device and the reaction tank; The shape of the interception device is the same as that of the reaction pool, the interception device is filled with biological fillers, and the side of the interception device is provided with a plurality of small holes for intercepting the biological fillers; The self-cleaning device is arranged at the bottom of the intercepting device; The microporous aeration device is arranged at the bottom of the reaction tank; A segmented water inlet pipe is arranged on the top of the reaction tank, and the segmented water inlet pipe is divided into a first segmented water inlet pipe and a second segmented water inlet pipe, the water outlet of the first segmented water inlet pipe leads into the interception device, and the water outlet of the second segmented water inlet pipe leads into the reaction tank outside the interception device; a water outlet pipe is arranged at the bottom of the reaction tank; The automatic control device is used to control the water inlet ratio of the first segment water inlet pipe and the second segment water inlet pipe.

2. A segmented water inlet MBBR sewage treatment system according to claim 1, characterized in that: Electric regulating valves are respectively arranged on the first segment water inlet pipe and the second segment water inlet pipe. The automatic control device is connected to a liquid level gauge. The liquid level gauge is located inside the interception device and in the reaction tank outside the interception device. The liquid level height inside the interception device and between the reaction tank and the interception device is collected to the automatic control device through the liquid level gauge. The automatic control device adjusts the water inlet ratio by adjusting the electric regulating valve.

3. A segmented water inlet MBBR sewage treatment system according to claim 1, characterized in that: The self-cleaning device is kept in communication with an external air source.

4. A segmented water inlet MBBR sewage treatment system according to claim 1, characterized in that: The volume of the interception device accounts for 20-80% of the volume of the reaction pool, and the filling ratio of the biological filler in the interception device is ≤65%; the apertures of the small holes on the side of the interception device are all smaller than the diameter of the biological filler.

5. A segmented water inlet MBBR sewage treatment system according to claim 1, characterized in that: The distance between the self-cleaning device and the bottom of the reaction tank is 0.5-1m; the microporous aeration device comprises aeration pipes, and the aeration pipes are distributed in the interception device and the reaction tank outside the interception device.

6. A staged water inlet MBBR sewage treatment system according to claim 1, characterized in that: The flow pushers are provided with a plurality of units, and the flow pushing directions of the flow pushers are kept consistent, and are all in a clockwise flow pushing mode or a counterclockwise flow pushing mode.

7. The segmented water inlet MBBR sewage treatment system according to claim 1, characterized in that: The water inlet volume ratio of the second segment water inlet pipe to the first segment water inlet pipe is 0.2-0.8:

1.

8. The segmented water inlet MBBR sewage treatment system according to claim 1, characterized in that: The reaction pool comprises a pool body, which is an elliptical three-dimensional structure. The interception device comprises an interception net body, which is also an elliptical three-dimensional structure. The side of the interception net body is fixed to the pool body through a supporting structure.

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