Calcified sludge cyclone screening device matched with anaerobic sewage treatment

Abstract

The utility model relates to a calcified sludge cyclone screening device matched with anaerobic sewage treatment, which comprises a screening tank and a booster pump, a conical tank bottom is arranged at the bottom of the screening tank, a sand inlet pipe is mounted on one side of the top of the conical tank bottom, a sand discharge pipe is fixedly connected to the bottom end of the conical tank bottom, and a backwashing header pipe is mounted at a liquid inlet of the booster pump. A four-way connector is installed at a liquid outlet of the booster pump, an upper backwashing screening pipe and a lower backwashing screening pipe which are communicated with the four-way connector are installed in the middle of the conical tank bottom, a sand washing pipe communicated with the four-way connector is installed at the end, close to the conical tank bottom, of the sand discharging pipe, and an overflow pipe is installed on one side of the middle of the screening tank. The equipment has the beneficial effects that rotational flow and high-pressure water screening technologies are matched to screen calcification and sand-containing granular sludge, and the equipment can be conveniently assembled with an existing anaerobic sewage treatment device.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a cyclone screening device for calcified sludge in conjunction with anaerobic wastewater treatment. Background Technology

[0002] However, the granular sludge in the current anaerobic wastewater treatment device is prone to calcification, and some influent contains serious sand. The wastewater contains high calcium ions and high alkalinity, which leads to calcification on the surface of the granular sludge and the formation of a hollow state inside. This reduces the activity of the granular sludge in the anaerobic device and further reduces the removal rate of organic matter.

[0003] Therefore, there is a need for a hydrocyclone screening device for calcified sludge that can remove sand and calcified particulate sludge. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned problems in the existing technology and provide a cyclone screening device for calcified sludge in anaerobic wastewater treatment.

[0005] To achieve the above-mentioned technical objectives and effects, this utility model is implemented through the following technical solution:

[0006] A cyclone screening device for calcified sludge in conjunction with anaerobic wastewater treatment includes a screening tank and a booster pump. The bottom of the screening tank is provided with a conical bottom for cyclone screening. A sand inlet pipe connected to the sludge outlet of the anaerobic wastewater treatment device is installed on one side of the top of the conical bottom. A sand discharge pipe connected to the sand discharge tank of the anaerobic wastewater treatment device is fixed to the bottom of the conical bottom. A backwash main pipe is installed at the inlet of the booster pump, and a four-way connector is installed at the outlet of the booster pump. An upper backwash screening pipe and a lower backwash screening pipe connected to the four-way connector are installed in the middle of the conical bottom. A sand flushing pipe connected to the four-way connector is installed at the end of the sand discharge pipe near the bottom of the conical bottom. An overflow pipe connected to the equalization tank of the anaerobic wastewater treatment device is installed on one side of the middle of the screening tank.

[0007] The screening tank is equipped with a stirrer for stirring the sludge inside the conical tank bottom.

[0008] The sand inlet pipe is equipped with a check valve to prevent sludge from flowing back into the anaerobic wastewater treatment device and a gate valve to control the opening and closing of the sand inlet pipe.

[0009] The backwash main is equipped with a first shut-off valve for controlling the on / off state of the backwash main.

[0010] The upper backwashing screen pipe is located above the lower backwashing screen pipe. A second shut-off valve for controlling the on / off state of the upper backwashing screen pipe is installed on the upper backwashing screen pipe. A third shut-off valve for controlling the on / off state of the lower backwashing screen pipe is installed on the lower backwashing screen pipe. A fourth shut-off valve for controlling the on / off state of the sand flushing pipe is installed on the sand flushing pipe.

[0011] The sand discharge pipe is equipped with a fifth shut-off valve for controlling the opening and closing of the sand discharge pipe.

[0012] The overflow pipe is equipped with a sixth shut-off valve for controlling the opening and closing of the overflow pipe.

[0013] The sand inlet pipe is arranged along the tangent direction of the bottom of the conical tank.

[0014] The screening tank is equipped with a steel support frame welded to its exterior.

[0015] The beneficial effects of this utility model are as follows: the granular sludge discharged from the sludge outlet of the anaerobic wastewater treatment device enters the screening tank through the sand inlet pipe, and is screened by centrifugal force through cyclone flow. The denser granular sludge is then screened through the upper and lower backwash screening pipes. The good granular sludge is transported to the equalization tank of the anaerobic wastewater treatment device through the overflow pipe, while calcified and sand-containing granular sludge enters the sand discharge tank of the anaerobic wastewater treatment device through the sand discharge pipe. This equipment uses a combination of cyclone flow and high-pressure water screening technology to screen calcified and sand-containing granular sludge, which is convenient for integration with existing anaerobic wastewater treatment devices. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of the structure of the cyclone screening device for calcified sludge in this utility model;

[0018] The following are the labels in the diagram: 1. Screening tank; 101. Conical tank bottom; 2. Booster pump; 3. Backwash main pipe; 3. First shut-off valve; 4. Four-way connector; 5. Sand inlet pipe; 5. Check valve; 501. Gate valve; 502. Sand discharge pipe; 6. Fifth shut-off valve; 601. Upper backwash screening pipe; 7. Second shut-off valve; 701. Lower backwash screening pipe; 8. Third shut-off valve; 801. Sand flushing pipe; 9. Fourth shut-off valve; 901. Overflow pipe; 10. Sixth shut-off valve; 1001. Agitator; 11. Steel support frame; 12. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] like Figure 1 As shown, a cyclone screening device for calcified sludge in anaerobic wastewater treatment includes a screening tank 1 and a booster pump 2. The bottom of the screening tank 1 is provided with a conical tank bottom 101 for cyclone screening.

[0021] A sand inlet pipe 5 is installed on one side of the top of the conical tank bottom 101, which is connected to the sludge outlet of the anaerobic wastewater treatment device. The sand inlet pipe 5 is arranged along the tangential direction of the conical tank bottom 101, so that the sludge discharged from the anaerobic wastewater treatment device enters the conical tank bottom 101 from the tangential direction of the conical tank bottom 101. The centrifugal force during the swirling flow screens the denser granular sludge. A check valve 501 is installed on the sand inlet pipe 5 to prevent sludge from flowing back to the anaerobic wastewater treatment device. A gate valve 502 is also installed on the sand inlet pipe 5 to control the opening and closing of the sand inlet pipe 5.

[0022] The bottom of the conical tank 101 is fixedly connected to a sand discharge pipe 6 that is connected to the sand discharge tank of the anaerobic wastewater treatment device. A fifth shut-off valve 601 is installed on the sand discharge pipe 6 to control the opening and closing of the sand discharge pipe 6.

[0023] The inlet of the booster pump 2 is equipped with a backwash main pipe 3, and a first shut-off valve 301 for controlling the opening and closing of the backwash main pipe is installed on the backwash main pipe 3.

[0024] The outlet of the booster pump 2 is equipped with a four-way connector 4. The middle part of the conical tank bottom 101 is equipped with an upper backwashing screen pipe 7 and a lower backwashing screen pipe 8 that are connected to the four-way connector 4. The upper backwashing screen pipe 7 is located above the lower backwashing screen pipe 8. A second shut-off valve 701 for controlling the opening and closing of the upper backwashing screen pipe 7 is installed on the upper backwashing screen pipe 7. A third shut-off valve 801 for controlling the opening and closing of the lower backwashing screen pipe 8 is installed on the lower backwashing screen pipe 8.

[0025] A sand flushing pipe 9 connected to a four-way connector 4 is installed at one end of the sand discharge pipe 6 near the bottom 101 of the conical tank. A fourth shut-off valve 901 is installed on the sand flushing pipe 9 to control the opening and closing of the sand flushing pipe 9.

[0026] An overflow pipe 10 connected to the regulating tank of the anaerobic wastewater treatment device is installed on one side of the middle section of the screening tank 1. A sixth shut-off valve 1001 for controlling the opening and closing of the overflow pipe is installed on the overflow pipe 10.

[0027] The screening tank 1 is equipped with an agitator 11 for stirring the sludge in the bottom of the conical tank.

[0028] The screening tank 1 is welded to a steel support frame 12 for supporting the screening tank 1. The steel support frame includes four steel vertical pipes arranged in a rectangular array. A steel crossbar is welded between two adjacent steel vertical pipes. The screening tank is welded and fixed to the steel crossbar.

[0029] Work process:

[0030] (1) Open the gate valve 502 to allow the sludge in the anaerobic wastewater treatment device to enter the bottom of the conical tank 101 through the sand inlet pipe 5 for swirling. Through centrifugal force, the denser granular sludge is screened.

[0031] (2) Open the first shut-off valve 301 to allow the backwash water to enter the booster pump 2 through the backwash main pipe 3. The booster pump 2 pressurizes the backwash water. Open the second shut-off valve 701, the third shut-off valve 801, and the fourth shut-off valve 901 to allow the backwash water to enter the conical tank bottom 101 through the upper backwash screening pipe 7, the lower backwash screening pipe 8, and the sand flushing pipe 9 respectively, and perform layer-by-layer screening through backwashing.

[0032] (3) After screening is completed, open the sixth shut-off valve 1001 so that the sewage in the upper part of the screening tank 1 flows into the regulating tank of the anaerobic sewage treatment device through the overflow pipe 10.

[0033] (4) Open the fifth shut-off valve 601 and discharge the sludge in the conical tank bottom 101 into the sand discharge pool of the anaerobic wastewater treatment device through the sand discharge pipe 6.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A hydrocyclone screening device for calcified sludge in conjunction with anaerobic wastewater treatment, characterized in that: The system includes a screening tank and a booster pump. The screening tank has a conical bottom for cyclone screening. A sand inlet pipe connected to the sludge outlet of the anaerobic wastewater treatment device is installed on one side of the top of the conical bottom. A sand discharge pipe connected to the sand discharge tank of the anaerobic wastewater treatment device is fixed to the bottom of the conical bottom. A backwash main pipe is installed at the inlet of the booster pump. A four-way connector is installed at the outlet of the booster pump. An upper backwash screening pipe and a lower backwash screening pipe connected to the four-way connector are installed in the middle of the conical bottom. A sand flushing pipe connected to the four-way connector is installed at the end of the sand discharge pipe near the bottom of the conical bottom. An overflow pipe connected to the equalization tank of the anaerobic wastewater treatment device is installed on one side of the middle of the screening tank.

2. The hydrocyclone screening device for calcified sludge according to claim 1, characterized in that: The screening tank is equipped with an agitator for stirring the sludge inside the conical tank bottom.

3. The cyclone screening device for calcified sludge according to claim 1, characterized in that: The sand inlet pipe is equipped with a check valve to prevent sludge from flowing back into the anaerobic wastewater treatment device and a gate valve to control the opening and closing of the sand inlet pipe.

4. The hydrocyclone screening device for calcified sludge according to claim 1, characterized in that: The backwash main is equipped with a first shut-off valve for controlling the on / off state of the backwash main.

5. The hydrocyclone screening device for calcified sludge according to claim 1, characterized in that: The upper backwashing screen pipe is located above the lower backwashing screen pipe. A second shut-off valve for controlling the on / off state of the upper backwashing screen pipe is installed on the upper backwashing screen pipe. A third shut-off valve for controlling the on / off state of the lower backwashing screen pipe is installed on the lower backwashing screen pipe. A fourth shut-off valve for controlling the on / off state of the sand flushing pipe is installed on the sand flushing pipe.

6. The hydrocyclone screening device for calcified sludge according to claim 1, characterized in that: The sand discharge pipe is equipped with a fifth shut-off valve for controlling the opening and closing of the sand discharge pipe.

7. The hydrocyclone screening device for calcified sludge according to claim 1, characterized in that: The overflow pipe is equipped with a sixth shut-off valve for controlling the opening and closing of the overflow pipe.

8. The cyclone screening device for calcified sludge according to claim 1, characterized in that: The sand inlet pipe is arranged along the tangent direction of the bottom of the conical tank.

9. The cyclone screening device for calcified sludge according to claim 1, characterized in that: The screening tank is welded to a steel support frame for supporting the screening tank.

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