Anaerobic tank for sewage treatment

Abstract

The utility model discloses a sewage treatment anaerobic tank which comprises an anaerobic tank body, a three-way pipe and a circulating pump, the anaerobic tank body is used for storing sewage and enabling the sewage to generate anaerobic reaction in the anaerobic tank body; the two sides of the anaerobic tank body are respectively provided with three three-way pipes which are distributed in an upper, middle and lower manner, and the three three-way pipes positioned on one side respectively correspond to the upper layer, the middle layer and the lower layer of sewage in the anaerobic tank body; and the upper three-way pipe and the lower three-way pipe are communicated with the input end of the circulating pump. According to the sewage treatment anaerobic tank disclosed by the utility model, the water pumping pipe is connected with the three-way pipes positioned at the upper part and the lower part to pump the sewage at the upper layer and the lower layer in the anaerobic tank body, and the pumped sewage at the upper layer and the lower layer in the anaerobic tank body is discharged to the middle layer through the return pipe, so that the sludge concentration and the strain concentration are adjusted through anaerobic internal circulation; the processing number of the liquid outlet holes in the anaerobic tank is reduced, the construction process of the anaerobic tank is simplified, the cost is reduced, and the construction efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of sewage treatment equipment, specifically to an anaerobic sewage treatment tank. Background Technology

[0002] Anaerobic tanks are key facilities in wastewater treatment that utilize anaerobic microorganisms to decompose organic matter under anaerobic conditions. They are mainly used to treat high-concentration organic wastewater. Their working principle is to gradually degrade pollutants through four stages: hydrolysis, acidification, acetic acid production, and methanogenesis, converting macromolecular organic matter into gases such as methane and carbon dioxide, thus achieving the dual benefits of pollutant removal and bioenergy recovery.

[0003] However, existing anaerobic digesters typically involve creating effluent outlets on the outer wall of the digester. These outlets are connected to an intermediate tank via pipes, and a circulation pump from the intermediate tank returns the effluent to the anaerobic digester, achieving external anaerobic circulation and thus regulating sludge and microbial concentrations. However, this method requires adding effluent outlets to the outer wall of the anaerobic digester and installing pipes to connect them to the intermediate tank, which is not only cumbersome but also increases construction costs. Therefore, there is an urgent need for a wastewater treatment anaerobic digester that is simpler, less expensive, and can also regulate sludge and microbial concentrations through internal anaerobic circulation. Utility Model Content

[0004] To overcome the aforementioned deficiencies of the prior art, this utility model provides an anaerobic wastewater treatment tank that reduces the number of effluent outlets and uses a three-way pipe inherent in the anaerobic tank to connect to a circulation pump to complete the anaerobic internal circulation, thereby adjusting the sludge concentration and bacterial concentration, simplifying the process, reducing costs, and improving construction efficiency, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An anaerobic wastewater treatment tank includes: an anaerobic tank body, a three-way pipe, and a circulation pump. The anaerobic tank body is used to store wastewater, and the wastewater undergoes an anaerobic reaction inside the anaerobic tank body. Three three-way pipes are arranged on both sides of the anaerobic tank body in an upper, middle, and lower distribution, with the three three-way pipes on one side corresponding to the upper, middle, and lower layers of wastewater inside the anaerobic tank body, respectively. The upper and lower three-way pipes are connected to the input end of the circulation pump, which draws the upper and lower layers of wastewater from the anaerobic tank body through the upper and lower three-way pipes. The output end of the circulation pump is connected to the middle three-way pipe, which discharges the drawn upper and lower layers of wastewater from the anaerobic tank body to the middle layer of the anaerobic tank body through the middle three-way pipe.

[0007] Preferably, each of the three T-pipes is equipped with a main pipe, and both ends of the main pipe have DN interfaces. Each of the three T-pipes is connected to the anaerobic tank through the DN interface at one end of the main pipe.

[0008] Preferably, a water pump is installed on the DN interface of the upper and lower three-way main pipes at the end furthest from the anaerobic tank. The other end of the two water pumps is installed at the input end of the circulation pump. The circulation pump draws sewage from the upper and lower layers inside the anaerobic tank through the two water pumps.

[0009] Preferably, both the input and output ends of the circulating pump are equipped with return pipes. The return pipe at the input end of the circulating pump is connected to two pumping pipes, and the return pipe at the output end of the circulating pump is installed on the DN interface at the end of the main T-junction pipe located in the middle that is furthest from the anaerobic tank. The circulating pump discharges the extracted upper and lower layer sewage into the inner middle layer of the anaerobic tank through the return pipes.

[0010] Preferably, a Y-type tee is provided on the return pipe at the input end of the circulating pump, and two water pumping pipes installed on the upper and lower tee pipes are connected to the return pipe via the interface of the Y-type tee.

[0011] Preferably, a pressure sensor and a flow sensor are installed on the return pipe at the output end of the circulating pump. The pressure sensor and the flow sensor are used to monitor the flow rate and velocity of the sewage circulation return.

[0012] Preferably, a branch pipe is provided on the outer wall of the main pipe, and a DN interface is provided at the end of the branch pipe away from the main pipe. The DN interface is used for sampling sewage inside the anaerobic tank, and a one-way valve is provided on the branch pipe for its opening and closing.

[0013] Compared with the prior art, the advantages of this utility model are:

[0014] By installing a pumping pipe and a return pipe on the circulating pump, the pumping pipe is connected to a three-way pipe located above and below to extract the upper and lower layers of sewage inside the anaerobic tank. The extracted upper and lower layers of sewage inside the anaerobic tank are discharged to the middle layer of the anaerobic tank through the return pipe, thus completing the anaerobic internal circulation. This achieves the adjustment of sludge concentration and bacterial concentration, simplifies the construction process of the anaerobic tank, reduces costs, and improves construction efficiency. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a structural block diagram of an anaerobic wastewater treatment tank according to an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the left-side pipeline layout of an anaerobic wastewater treatment tank according to an embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the right-side pipeline layout of an anaerobic wastewater treatment tank according to an embodiment of the present invention.

[0019] In the diagram: 1. Anaerobic tank; 2. T-pipe; 21. Check valve; 3. Circulation pump; 31. Y-type tee; 4. Pressure sensor; 5. Flow sensor. Detailed Implementation

[0020] Combination Figures 1-3 As shown in this embodiment, an anaerobic wastewater treatment tank includes: an anaerobic tank body 1, a three-way pipe 2, and a circulation pump 3. The anaerobic tank body 1 is used to store wastewater. The wastewater undergoes an anaerobic reaction inside the anaerobic tank body 1. The wastewater in the anaerobic tank body 1 mixes and decomposes with the reactants under anaerobic conditions, which can effectively degrade the organic matter in the wastewater and achieve the dual goals of pollutant removal and energy recovery.

[0021] In this embodiment, three T-pipes 2 are arranged on both sides of the anaerobic tank 1 in an upper, middle, and lower configuration. The three T-pipes 2 on one side correspond to the upper, middle, and lower layers of sewage inside the anaerobic tank 1, respectively. Each of the three T-pipes 2 is equipped with a main pipe, and both ends of the main pipe have DN80 interfaces. The three T-pipes 2 are connected to the anaerobic tank 1 through the DN80 interfaces at one end of the main pipe. By using three T-pipes 2 arranged in an upper, middle, and lower configuration to connect with the anaerobic tank 1, the sewage in the anaerobic tank 1 can be treated in layers, guiding the movement of sewage in the upper, middle, and lower layers and sludge settled at the bottom of the tank, accelerating the mixing and decomposition of sewage and reactants, and improving treatment efficiency.

[0022] In this embodiment, the upper and lower three-way pipes 2 are connected to the input end of the circulation pump 3. The circulation pump 3 draws the upper and lower layers of sewage inside the anaerobic tank 1 through the upper and lower three-way pipes 2, and the output end of the circulation pump 3 is connected to the middle three-way pipe 2. The circulation pump 3 discharges the drawn upper and lower layers of sewage inside the anaerobic tank 1 to the middle layer of the anaerobic tank 1 through the middle three-way pipe 2. By using the circulation pump 3 connected to the upper and lower three-way pipes 2 to draw the upper and lower layers of sewage inside the anaerobic tank 1, and discharging the drawn upper and lower layers of sewage inside the anaerobic tank 1 to the middle layer of the anaerobic tank 1 through the middle three-way pipe 2, the purpose of sewage mixing is achieved.

[0023] In this embodiment, a water pump is installed on the DN80 interface of the main pipe of the upper and lower three-way pipe 2 at the end away from the anaerobic tank 1. The other end of the two water pumps is installed at the input end of the circulation pump 3. The circulation pump 3 draws sewage from the upper and lower layers inside the anaerobic tank 1 through the two water pumps. A Y-type tee 31 is installed on the return pipe at the input end of the circulation pump 3. The two water pumps installed on the upper and lower three-way pipe 2 are connected to the return pipe at the interface of the Y-type tee 31. The two water pumps installed on the upper and lower three-way pipe 2 are connected to the return pipe at the input end of the circulation pump 3 by using the Y-type tee 31 to achieve the purpose of drawing sewage from the upper and lower layers inside the anaerobic tank 1.

[0024] In this embodiment, both the input and output ends of the circulating pump 3 are equipped with return pipes. The return pipe at the input end of the circulating pump 3 is connected to two pumping pipes, and the return pipe at the output end of the circulating pump 3 is installed on the DN80 interface of the main T-pipe 2 located in the middle, away from the anaerobic tank 1. The circulating pump 3 discharges the extracted upper and lower layer sewage into the middle layer of the anaerobic tank 1 through the return pipe. The return pipe at the output end of the circulating pump 3 is installed on the DN80 interface of the main T-pipe 2 located in the middle, so that the circulating pump 3 discharges the extracted sewage into the middle layer of the anaerobic tank 1, completing the anaerobic cycle and realizing the adjustment of sludge concentration and bacterial concentration.

[0025] In this embodiment, a pressure sensor 4 and a flow sensor 5 are installed on the return pipe at the output end of the circulating pump 3. The pressure sensor 4 and the flow sensor 5 are used to monitor the flow rate and velocity of the sewage circulation return. The pressure sensor 4 monitors the pressure of the sewage in the return pipe, and the flow sensor 5 monitors the flow rate and velocity of the sewage circulation return into the anaerobic tank 1 in real time. The flow sensor 5 is a Doppler ultrasonic flow meter. Based on the Doppler effect principle, it uses the frequency change generated when the ultrasonic signal encounters bubbles, solid particles or impurities in the fluid to measure the flow rate and velocity of the fluid, ensuring the stability of the sewage return and improving the sewage treatment effect.

[0026] In this embodiment, a branch pipe is provided on the outer wall of the main pipe. A DN20 interface is provided at the end of the branch pipe away from the main pipe. The DN20 interface is used for sampling sewage inside the anaerobic tank 1. A one-way valve 21 is provided on the branch pipe for opening and closing. The one-way valve 21 controls the branch pipe to close, preventing sewage leakage from the branch pipe during the circulation and ensuring the sewage circulation and return. The one-way valve 21 controls the branch pipe to open, so that sewage in the upper, middle and lower layers of the anaerobic tank 1 can be sampled from the DN20 interface of the branch pipe. The sewage treatment effect is determined based on the sample.

[0027] The anaerobic wastewater treatment tank proposed in this utility model uses a three-way pipe 2 of the anaerobic tank body 1 to connect to a circulation pump 3. The circulation pump 3 draws the upper and lower layers of wastewater inside the anaerobic tank body 1 through the pumping pipe connected to the three-way pipes 2 located at the top and bottom. The drawn upper and lower layers of wastewater inside the anaerobic tank body 1 are discharged to the middle layer of the anaerobic tank body 1 through the return pipe, completing the internal anaerobic circulation. The internal anaerobic circulation can also adjust the sludge concentration and bacterial concentration, reduce the number of processing holes on the anaerobic tank, simplify the construction process of the anaerobic tank, reduce costs, and improve construction efficiency.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An anaerobic wastewater treatment tank, characterized in that, include: The anaerobic tank (1), three-way pipes (2), and circulation pump (3) are provided. The anaerobic tank (1) is used to store sewage, and the sewage undergoes an anaerobic reaction inside the anaerobic tank (1). Three three-way pipes (2) are provided on both sides of the anaerobic tank (1) in an upper, middle, and lower distribution. The three three-way pipes (2) on one side correspond to the upper, middle, and lower layers of sewage inside the anaerobic tank (1), respectively. The three three-way pipes (2) located at the top and bottom are respectively... The circulation pump (3) is connected to the input end of the circulation pump (3). The circulation pump (3) draws the upper and lower layers of sewage inside the anaerobic tank (1) through the three-way pipe (2) located above and below. The output end of the circulation pump (3) is connected to the three-way pipe (2) located in the middle. The circulation pump (3) discharges the drawn upper and lower layers of sewage inside the anaerobic tank (1) to the middle layer of the anaerobic tank (1) through the three-way pipe (2) located in the middle.

2. The anaerobic wastewater treatment tank according to claim 1, characterized in that, Each of the three T-pipes (2) is equipped with a main pipe, and both ends of the main pipe have DN80 interfaces. The three T-pipes (2) are connected to the anaerobic tank (1) through the DN80 interface at one end of the main pipe.

3. The anaerobic wastewater treatment tank according to claim 2, characterized in that, The DN80 interface of the three-way pipe (2) located above and below is equipped with a water pumping pipe at the end away from the anaerobic tank (1). The other end of the two water pumping pipes is installed at the input end of the circulation pump (3). The circulation pump (3) draws sewage from the upper and lower layers inside the anaerobic tank (1) through the two water pumping pipes.

4. The anaerobic wastewater treatment tank according to claim 3, characterized in that, The circulation pump (3) is equipped with a return pipe at both its input and output ends. The return pipe at the input end of the circulation pump (3) is connected to two pumping pipes. The return pipe at the output end of the circulation pump (3) is installed on the DN80 interface of the main pipe of the three-way pipe (2) located in the middle, away from the anaerobic tank (1). The circulation pump (3) discharges the extracted upper and lower wastewater into the middle layer of the anaerobic tank (1) through the return pipe.

5. The anaerobic wastewater treatment tank according to claim 3, characterized in that, A Y-type tee (31) is provided on the return pipe at the input end of the circulating pump (3). Two water pumping pipes installed on the tee pipes (2) located above and below are connected to the return pipe by the interface of the Y-type tee (31).

6. The anaerobic wastewater treatment tank according to claim 4, characterized in that, A pressure sensor (4) and a flow sensor (5) are installed on the return pipe at the output end of the circulating pump (3). The pressure sensor (4) and the flow sensor (5) are used to monitor the flow rate and velocity of the sewage circulation return.

7. The anaerobic wastewater treatment tank according to claim 2, characterized in that, The outer wall of the main pipe is provided with a branch pipe, and the end of the branch pipe away from the main pipe is provided with a DN20 interface. The DN20 interface is used for sewage sampling inside the anaerobic tank (1), and the branch pipe is provided with a one-way valve (21) for its opening and closing.

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