MBR (Membrane Bioreactor) sludge reflux optimization system

Abstract

The utility model relates to an MBR (Membrane Biological Reactor) sludge reflux optimization system and belongs to the technical field of chemical wastewater treatment. The system comprises a clarification tank, a biochemical tank and an MBR tank which are sequentially communicated, the MBR tank is in pipeline connection with the biochemical tank through a return pipe, a return pump is arranged on the return pipe, a three-way pipe is further arranged on the return pipe, an intercepting pipe is connected to the three-way pipe, the other end of the intercepting pipe is connected with the clarification tank, and the other end of the intercepting pipe is connected with the MBR tank. And a regulating valve is also arranged on the intercepting pipe. According to the utility model, a part of sludge flowing back into the biochemical pool is intercepted, so that the sludge content in the biochemical pool is reduced, the operation burden of the MBR pool is reduced, the cleaning frequency of the MBR pool is further reduced, and the operation cycle is prolonged. And meanwhile, the water inlet and outlet indexes of the MBR tank are well controlled, and the sludge reflux quantity can be adjusted at any time through the valve, so that the service life of the MBR membrane is effectively prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical wastewater treatment, and in particular relates to an MBR sludge return optimization system. Background Art

[0002] In today's sewage treatment field, membrane bioreactor (MBR) technology has been widely used due to its advantages such as efficient solid-liquid separation ability, high biomass and small footprint. During operation, the microorganisms in the bioreactor degrade and transform pollutants such as organic matter in the sewage.

[0003] However, over time, existing MBR systems began to experience issues with sludge return. The entire MBR sludge return water entered the biochemical tank. This prolonged return flow resulted in excessive sludge levels in the biochemical tank, which in turn increased the operational burden on the MBR. This resulted in an increasing amount of sludge accumulation in the biochemical tank, leaving the problem of excessive sludge in the tank unresolved. Summary of the Invention

[0004] The utility model aims to provide an MBR sludge return optimization system which can reduce the operating burden of an MBR pool.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions:

[0006] The MBR sludge return optimization system is characterized in that it includes a clarifier, a biochemical tank and an MBR tank connected in sequence, the MBR tank is connected to the biochemical tank pipeline through a return pipe, a return pump is provided on the return pipe, a tee is also provided on the return pipe, an interception pipe is connected to the tee, the other end of the interception pipe is connected to the clarifier, and a regulating valve is also provided on the interception pipe.

[0007] The beneficial effects of the present invention are:

[0008] By intercepting a portion of the sludge that returns to the biochemical pool, the sludge content in the biochemical pool is reduced, reducing the operating burden of the MBR pool and further reducing the cleaning frequency of the MBR pool, thereby extending the operating cycle. At the same time, the inlet and outlet water indicators of the MBR pool are well controlled, and the amount of sludge return can be adjusted at any time through the valve, effectively extending the service life of the MBR membrane.

[0009] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1This is a structural diagram of an MBR sludge return optimization system shown in one embodiment of the present utility model.

[0011] The attached figure shows: 1. Clarification tank; 2. Biochemical tank; 3. MBR tank; 4. Reflux pump; 5. T-piece; 6. Regulating valve; 7. Intercept pipe. DETAILED DESCRIPTION

[0012] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0013] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0014] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0015] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0016] See Figure 1 The MBR sludge return optimization system shown in a preferred embodiment of the present application includes a clarifier 1, a biochemical tank 2 and an MBR tank 3 connected in sequence. The MBR tank 3 is connected to the biochemical tank 2 through a return pipe. A reflux pump 4 is provided on the return pipe. A tee is also provided on the return pipe. The tee is connected to an intercepting pipe 7. The other end of the intercepting pipe 7 is connected to the clarifier 1. A regulating valve 6 is also provided on the intercepting pipe.

[0017] Working principle:

[0018] By installing a tee and an intercepting pipe on the existing return pipe, a portion of the sludge return water from the MBR tank 3 to the biochemical tank 2 is diverted to the clarifier tank 1 for dosing, sedimentation, and filtration. The diversion flow rate can be adjusted by the regulating valve 6. Through this process, the flow rate of the sludge return water to the biochemical tank 2 can be adjusted according to the situation, thereby reducing the sludge content in the biochemical tank 2 and alleviating the operating burden of the MBR tank 3, thereby extending the service life of the MBR membrane.

[0019] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0020] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. An MBR sludge return optimization system, characterized in that: The invention comprises a clarification tank, a biochemical tank and an MBR tank which are connected in sequence. The MBR tank is connected to the biochemical tank pipeline through a return pipe. A reflux pump is provided on the return pipe. A tee is also provided on the return pipe. An intercepting pipe is connected to the tee. The other end of the intercepting pipe is connected to the clarification tank. A regulating valve is also provided on the intercepting pipe.

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