Deep dewatering equipment and method for electrochemical sludge

Abstract

The invention discloses deep dewatering equipment and method for electrochemical sludge. The equipment comprises a main machine support, a feeding machine, a sludge conveying belt, a conveying belt drive mechanism, one or more serially connected electrochemical sludge dewatering mechanisms, a sludge cake separating mechanism and a sludge conveying belt descaling and cleaning system and is characterized in that each electrochemical sludge dewatering mechanism comprises a lower plate, a lower plate electrode, an upper plate, an upper plate electrode, an electrode insulating plate, an upper platesealing cover, sealing springs, spring pull rods, pressurizing hydraulic oil cylinders and crossbeams. The deep dewatering equipment has the advantages that dewatering is performed by combining the electrochemical phenomenon of the sludge after being added into a direct-current electric field with mechanical pressure; the water content of the active residual sludge can be lowered from 85% to below 40% in one step without conditioning measures, the size of the residual sludge is reduced by more than 2 / 3, microorganism cell membranes in the sludge can be destroyed by the electrochemical effect,ascaris lumbricoides eggs and pathogenic microorganisms in the sludge can be killed, and part of heavy metal can be removed.

Description

technical field [0001] The invention belongs to the technical field of sludge deep dewatering, and relates to an electrochemical sludge deep dewatering device and a sludge deep dewatering method. Background technique [0002] In recent years, my country's sludge treatment industry has developed rapidly. Benefiting from the continuous improvement of the production technology of the sludge treatment industry and the continuous expansion of the downstream demand market, the development situation of the sludge treatment industry in the domestic and international markets is very optimistic. According to the statistics of the Ministry of Housing and Urban-Rural Development, the national urban sludge treatment and disposal scale will reach 25,000kt / a (80% water content) during the "Twelfth Five-Year Plan" period. Sludge dewatering is an important unit operation in the sewage treatment process, and its dehydration degree is directly related to the subsequent disposal cost and resour...

AI Technical Summary

Problems solved by technology

The moisture content of the sludge is 78% to 85%. Due to the large volume and high moisture content of the sludge, it will occupy a large area, high transportation costs, low calorific value, and any kind of mechanical dehydration cannot remove Removal of heavy metals present in sludge

[0005] To improve the sludge with a water content of 60% to 70% through conditioning measures, a large amount of additives or chemicals will be added, which will increase the sludge and increase the treatment cost.

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