Sludge dewatering processing method in sewage treatment process

Abstract

The invention provides a sludge dewatering processing method in a sewage treatment process. The method comprises the following steps of: (1) arranging a mechanical dewaterer at a position 1 to 1.5 meters higher than the ground surface, laying reinforced concrete under the mechanical dewaterer, directly connecting a mud bucket to a sludge outlet of the mechanical dewaterer to ensure that sludge directly enters the mud bucket after being dewatered, and constructing an underground channel for a mechanical vehicle to receive the sludge and transport the sludge outwards under ground surface of the mud bucket; and (2) introducing treated sewage into a recycle-water tank and then to the mechanical dewaterer to wash a filter cloth. The method has the advantages of: a, saving a step of transporting the sludge, improving the efficiency of the dewaterer, reducing equipment failure rate by saving a sludge delivery pump, and solving the problem of difficult operation; and b, reducing operation cost by using the treated sewage to wash the filter cloth and not using running water resources any more, simultaneously fulfilling the aim of changing waste into valuable things, and achieving multiple purposes at one stroke.

Description

technical field [0001] The invention relates to a sludge dehydration treatment method in the sewage treatment process. Background technique [0002] The current water treatment adopts the improved oxidation ditch biological nitrogen and phosphorus removal process, and the advanced treatment adopts coagulation, sedimentation, filtration and disinfection processes; the current mechanical dehydrator dehydrates the remaining sludge and squeezes it into mud cakes, which need to be transported Put it into the mud bucket at a high place outside, and then use mechanical vehicles to transport the sludge to the landfill plant for sanitary landfill. The currently adopted method of transporting mud is to use a mud cake delivery pump to pump directly into the mud hopper at the upper level, but this is very difficult in actual operation. The reasons are as follows: [0003] (1) The head of the mud hopper is high, the mud delivery pipeline is long, there are many elbows, flanges, etc., a...

AI Technical Summary

Problems solved by technology

[0003] (1) The head of the mud hopper is high, the mud delivery pipeline is long, there are many elbows, flanges, etc., and the friction resistance inside the pipe is also relatively large. In actual operation, if the dehydrator runs at full load, the mud cake will The conveying speed of the conveyor is much lower than the mud pressing speed of the dewatering machine, which limits the efficiency of the mud compacting machine and affects the process scheduling of the entire treatment process; sometimes, it even causes blockage of the mud conveying pipeline

[0004] (2) High operating cost: the low efficiency of the dehydrator due to the low efficiency of mud delivery, resulting in waste of chemicals, tap water, labor, electric energy, etc.

[0005] (3) Frequent failure rate of equipment: The mud cake conveying pump is in the overload operation state for a long time, so that it has frequent failures, while other equipment is in the low load operation state, and failures occur from time to time, such as mud pumps, dosing pumps, etc.

[0006] (4) Serious waste of tap water resources: tap water is used to wash the filter cloth for mud pressing, and up to 100 cubic meters of water are used every day

[0007] Sludge dewatering operation is difficult, high operating cost, frequent equipment failure rate, serious waste of tap water resources, etc. are important problems that need to be solved