Desilting geotextile tube bag on-site rapid dehydration method

Abstract

The invention provides a desilting geotextile tube bag on-site rapid dehydration method which comprises the following steps: step 1, pretreatment: pretreating river bottom silt through a pretreatmentdevice to form slurry with the silt content not lower than 50%; step 2, filling: filling the pretreated slurry into a geotextile tube bag body through a sludge conveying system; step 3, rapid dehydration: adding a soluble flocculating agent into the geotextile tube bag to rapidly remove water in the slurry, and depositing solids in the slurry to form blocky sludge; and step 4: solidification: depositing the blocky sludge on the inner wall of the geotextile tube bag, filtering out small particles, and then performing first-section continuous dehydration through gravity factors, rheological factors and the like so as to form dry sludge. With application of the technical scheme, dehydration can be conducted on site without pumping out river water, full-closed construction is achieved, and secondary pollution is not liable to be caused; the slurry with the mud content not lower than 50% is formed through stirring, more labor is saved during pumping, and the efficiency is higher.

Description

technical field [0001] The invention belongs to the technical field of sludge weight reduction treatment, and in particular relates to a method for rapid dehydration of geotechnical pipe bags on site. Background technique [0002] The number of sewage treatment plants and sewage treatment stations in my country is increasing year by year, and the amount of sludge produced is also increasing day by day. In addition to the excess sludge produced by sewage treatment, the amount of sludge produced by dredging and dredging projects in urban rivers and lakes in my country is as high as 8,000 More than 10,000 tons, how to quickly and effectively deal with these generated sludge has become an urgent problem to be solved. [0003] Researchers at home and abroad have done a lot of research on sludge dewatering and reduction. The geotechnical tube bag dewatering technology has received great attention from the environmental protection community due to its advantages of low cost, large p...

AI Technical Summary

Problems solved by technology

At present, electroosmotic dehydration is often combined with mechanical dehydration, which can improve the dehydration effect of mechanical dehydration, but the treatment capacity is small, the equipment investment is large, and the treatment cost is high.

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