Sludge modified diaphragm compressed deep dehydration process and system

Abstract

The invention discloses a sludge modified diaphragm compressed deep dehydration process and system. The process comprises the following steps: (1) metering sludge, and entering an elliptical cascade sludge pre-thickening system for thickening and dehydration; (2) enabling the thickened sludge to directly enter a sludge conditioning tank for conditioning, sequentially adding a conditioner a and a conditioner b to be uniformly stirred, and modifying the sludge; and (3) enabling the modified sludge to enter a special sludge compressed dehydration equipment system for performing deep compressed dehydration treatment, and enabling the finally obtained cake sludge to enter an outwards sludge transport system. The improved process is simple and convenient to operate, and the moisture content of the treated sludge is 60% or less. The invention further provides a sludge modified diaphragm compressed deep dehydration system. According to the system, the dehydration efficiency of a filter press can be improved, the sludge volume is reduced, the cost is reduced, the land utilization efficiency is improved, the low-cost goal of the sludge is achieved, and convenience is brought to subsequent resource treatment.

Description

technical field [0001] The invention relates to the technical field of sludge deep dewatering, in particular to a sludge modified diaphragm pressing deep dehydration process and system. Background technique [0002] With the continuous improvement of my country's sewage treatment rate, the output of sludge is also on the rise. my country's sludge treatment started relatively late. During the construction of early sewage treatment plants, there has been a phenomenon of "heavy water and light mud" for a long time. The sludge treatment methods are transported abroad, simply landfilled or piled up, and the sludge contains a large number of pathogenic bacteria and organic matter. And heavy metals, simple filling will cause more serious secondary pollution. In March 2011, the Ministry of Housing and Urban-Rural Development and the Development and Reform Commission jointly issued the "Technical Guidelines for Sludge Treatment and Disposal of Urban Sewage Treatment Plants" and in Fe...

AI Technical Summary

Problems solved by technology

At present, most of the commonly used plate and frame filter presses are single-diaphragm plate and frame filter presses, which belong to high-flow and low-pressure feeding, high energy consumption, low effective filtration capacity, cumbersome supporting equipment, and complicated operation and maintenance; filter plates are mostly made of PP material , easily damaged, the mud inlet pressure can only reach 8bar, and a pressure-holding pump must be added to pressurize the feed to protect the filter plate; sludge pressing uses water pressure, which requires high power and high power consumption, and is not easy to adjust; backwashing system The suspension beam mobile device is adopted, the flushing water volume is large, and it is easy to form water spray or water mist, and the operating environment is easy to be humid, which will affect the mud cake.

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