Fill interception and dredging system for sewage treatment

Abstract

The invention discloses a filler intercepting and dredging system for sewage treatment. A guide wall is arranged in the length direction of a sewage treatment tank, the front end of the guide wall is attached to the wall of the tank, a gap is reserved between the rear end of the guide wall and the wall of the tank, a water inlet is formed in one side of the guide wall, a water outlet is formed in the other side of the guide wall, an interception wall is arranged in front of the water outlet, drainage holes are formed in the middle of the interception wall and covered with barrel type interception nets, discharge slots are formed in the upper end of the interception wall, a group of small-power submersible water impellers are arranged in front of the interception wall, the rear part of the interception wall is divided into an upper part and a lower part, the upper part adopts a filler platform, filler and water are pushed into the filler platform, the lower part adopts a drainage cavity, and sewage enters the drainage cavity and then is discharged out of the sewage treatment tank; a notch is formed in the guide wall in the position of the filler platform, so that the filler platform and one end of the water inlet are communicated to form tank internal circulation. The flow direction design is reasonable, local blocking cannot be caused, materials are saved, the cost is low, water flows slowly, accumulation at dead angles cannot be caused, the operation cost is low, and the filler intercepting and dredging system is applicable to dredging of filler in sewage treatment.

Description

technical field [0001] The invention relates to the technical field of sewage treatment Background technique [0002] For the MBBR process in the sewage treatment system, a certain proportion of biological suspension filler is placed in the water, and the biofilm is attached to the filler to purify the sewage. Sewage continues to flow into the pool from the water inlet, and flows along the guide in the pool for a period of time to be discharged from the water outlet. During this time, the sewage is decomposed and purified by the biofilm carrier on the filler, and the filler needs to be kept in the pool for circulation. In the prior art, in order to maintain the continuous inflow and outflow of sewage and the circulation of filler, the filler interception and dredging system for sewage treatment such as figure 1 As shown, a diversion wall is set in the pool, and the front and rear ends of the diversion wall maintain a gap with the pool wall, and the sewage as a whole continu...

AI Technical Summary

Problems solved by technology

[0005] 3. In order to avoid the accumulation of the above-mentioned fillers, it is necessary to use a more powerful propeller to increase the moving speed of the fillers in the pool, resulting in serious wear between the fillers and the wall, and between the fillers and the paddles;

[0006] 4. The use of high-power submersible flowmakers has high energy consumption and increased operating costs;

[0008] 6. Due to the physical characteristics of the plate-type interception net, its bending and tensile strength is small and it is easy to deform. Therefore, when designing, it is necessary to use a smaller flow rate through the hole, so the area of ​​​​the interception net is larger and the cost is higher.

[0009] Therefore, the use of plate-type interception and dredging system has high energy consumption and poor reliability, which cannot meet the needs of MBBR treatment process

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