Efficient electroosmotic sludge dehydrator

Abstract

The invention relates to an efficient electroosmotic sludge dehydrator, comprising a frame, a sludge dehydration unit, a drive mechanism that powers the sludge dehydration unit, and a power source; the sludge dehydration unit comprises a plurality of moving mesh plates and extrusion plates movably arranged at lower and upper portions of the frame respectively along set trajectories, both the moving mesh plates and the extrusion plates are made of conductive material and are communicated with a cathode and anode of the power source respectively, a horizontally extended sludge extrusion passage is formed between the extrusion plates and the moving mesh plates, and the sludge extrusion passage narrows gradually from its inlet end to its outlet end and forms a quick extrusion area close to its inlet end; the narrowing rate of the sludge extrusion passage corresponding to the quick extrusion area is greater than that of the other area of the sludge extrusion passage. Compared with a dehydrator of ZL201310285709.6, the efficient electroosmotic sludge dehydrator has dehydration efficiency increased by about 30% with the dehydration effect unchanged, and is easier to popularize.

Description

technical field [0001] The invention relates to a sludge dewatering device, in particular to an electroosmotic sludge dewatering machine. Background technique [0002] With the development of social economy and the acceleration of urbanization, the amount of urban sewage treatment plants and the accompanying sludge has increased rapidly. According to relevant materials, in 2010, the sludge produced by my country's sewage treatment plants reached 300 million tons. Because sludge contains a large amount of cell water, at present, almost all the existing equipment and technology of sewage treatment plants can only reduce the moisture content of sludge to about 80%. More than 50% will cost a lot of money, so almost all sewage treatment plants in our country often can only use sludge as landfill and pile up, which has caused serious environmental pollution problems. Using the principle of electro-osmotic dehydration to treat sludge, it can be seen from the experimental data tha...

AI Technical Summary

Problems solved by technology

Compared with the traditional dehydrator, this dehydrator can give full play to the performance of electroosmosis, and directly use the moving extrusion plate and the moving mesh belt to squeeze the sludge, and both the extrusion plate and the moving mesh plate are connected to the power supply. Under the action of electrophoresis, the water in the sludge is squeezed out. With this structure, the efficiency of electroosmosis can be fully utilized, and the water content of the sludge cake after pressing can be reduced to 50% or even below 40%. However, the actual operation of the dehydrator When the dehydration efficiency is relatively lacking, resulting in slow promotion

Images