Drainage type sewage treatment packing circulation system

Abstract

The invention discloses a dredging type wastewater treatment filler circulation system. The system is characterized in that the front end of a flow guide wall of a sewage treatment tank and a tank wall are attached, a gap is formed between the rear end and the tank wall, a water inlet is formed in one side of the flow guide wall, a water outlet is formed in the other side of the flow guide wall, an intercepting wall is arranged in front of the water outlet, drain holes are formed in the middle of the intercepting wall and covered with barrel-shaped intercepting nets, a discharge chute is formed in the upper end of the intercepting wall, a group of low-power submersible water impellers are arranged in front of the intercepting wall, the rear part of the intercepting wall is divided into an upper part and a lower part by a partition board, a filler platform is arranged at the upper part, filler and water are pushed to the filler platform, a water drain cavity is formed in the lower part, and sewage enters the water drain cavity and is discharged of the sewage treatment tank; each drain hole is further provided with a servicing silo, a notch is formed in the flow guide wall on the filler platform, and accordingly, the filler platform and one end of the water inlet are communicated to form circulation in the tank. According to the dredging type wastewater treatment filler circulation system, the structure and flow direction design are reasonable, local blockage is avoided, materials are saved, water flows slowly and avoids dead angle accumulation, the operating cost is low, and the system is applicable to filler circulation control 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 fillers, the dredging-type sewage treatment filler circulation system adopted is as follows: 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 w...

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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