High dryness dewatering method and equipment for high moisture content sludge

Abstract

The present invention discloses a high dryness dewatering method for high moisture content sludge. According to the method, spiral belt type concentration electro-osmosis vibration pressing integrated equipment is adopted to carry out one time dewatering on sludge with a moisture content of 99.2-95.0% to achieve the moisture content of 60.0-55.0%, wherein the spiral belt type concentration electro-osmosis vibration pressing integrated equipment comprises a material feeding system, an agent adding system, a material mixing system, a conveying system, a spiral concentration dewatering system, a belt type pressing dewatering system, an electro-osmosis pressing dewatering system, and a vibration pressing dewatering system.

Description

technical field [0001] The invention relates to a method for dehydrating sludge, in particular to a method for dehydrating sludge with high water content and high dryness. In addition, the method also provides equipment for realizing the method. Background technique [0002] As we all know, the production efficiency of the belt dehydrator largely depends on the effect of gravity dehydration. The slurry after flocculation treatment is firstly subjected to gravity dehydration. At the beginning of filtration, the filtrate only needs to overcome the resistance of the filter medium, and the filtration rate at this time is relatively fast. As the filtration time increases, the flocs sink, the particle gap narrows, the filling density increases, and the filtration rate slows down, especially for sludge. During the gravity dehydration process, it is easy to form a relatively dense filter layer on the surface of the filter belt, causing the filtration rate to quickly drop to zero. ...

AI Technical Summary

Problems solved by technology

[0008] To sum up, the traditional belt press sludge dewatering, the water content of the dehydrated filter cake is still very high (75.0% ~ 80.0%), the reason is that a lot of water is stored inside the sludge molecules, collectively referred to as intracellular water, If it is not released, it is difficult to release this part of the intracellular water by using the traditional sludge dehydration method; while the electro-osmotic dehydration method, under the action of the electric field force, the intracellular water of the sludge will be easily pierced and flow out

Although the intracellular water can be easily released by electroosmosis, it is obviously uneconomical to directly use electroosmosis for sludge with a high initial moisture content (water content 99.2% to 95.0%)

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