A kind of sludge dehydration method

A technology of sludge and sludge tank, which is applied in the direction of dehydration/drying/thickened sludge treatment, etc., which can solve the problems of large space occupation, high energy consumption, and large noise

Inactive Publication Date: 2011-12-07
JIANGSU VOCATIONAL INST OF ARCHITECTURAL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is not easy to find a way to "squeeze water" from the sludge as much as possible
The advantages and disadvantages of the existing sludge dehydration method: 1. Thermal evaporation method, which is the most straightforward method, is simple and easy to implement, but the energy consumption is too high. Every time 1 ton of sludge with a moisture content of 80% is processed, it will take 200 Only one kilogram of water can become sludge with a moisture content of 75%, and the method of thermal energy evaporation needs to consume 25 kilograms of coal or 18.3 cubic meters of natural gas
Due to the need to cooperate with the thickening tank, these facilities are often fixed in the sludge treatment field, and most of them have disadvantages such as high energy consumption, high noise, and large space occupation.

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0014] The method includes excavating pits, setting up dewatering wells, setting electrodes in the middle of the trenches, using electrophoresis to drive the water in the sludge to the water well pipe for dehydration; setting up reinforced concrete pits, and using vacuum precipitation to remove the sludge Moisture content in the concrete according to the following steps:

[0015] (1) Sludge discharge in the soil layer with good water permeability: directly excavate pits with a depth of 4-5 meters and a width of 4-5 meters, pour the sludge into the pits, set up protective railings around them, and hang safety Sign;

[0016] (2) Sludge discharge in the soil layer area with poor water permeability: build a retaining wall with bricks on the edge of the pit in step (1), fill the filter sand layer (500-1000mm thick), inject the sludge into the pit, Set up protective railings around and hang safety signs;

[0017] (3) Inject the sludge into the pit, and set up light dewatering well...

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Abstract

The invention relates to treatment of sludge, in particular to a dehydrating method for sludge, belonging to the technical field of environmental protection. The method comprises the following steps of: excavating a chuck hole, setting a dewatering well, arranging an electrode in the middle of the chuck groove, draining water in the sludge into a water well pipe for dehydrating by using an electrophoresis method; and forming a reinforced concrete chuck hole, draining moisture in the sludge by using a vacuum dewatering method, and extracting moisture from the sludge by using a gravity method or a vacuum method. The method is a most effective, cheapest and most complete sludge dehydrating method; and according to the method, waste is utilized, and harmful substances are changed into valuable.

Description

technical field [0001] The invention relates to sludge treatment, in particular to a sludge dehydration method, which belongs to the technical field of environmental protection. Background technique [0002] Modernization has enabled our country to gradually get rid of poverty and backwardness, but it has also produced a lot of sewage and sludge for us. In the 1990s, there were 78 sewage treatment plants in 40 cities in China. In 1995, the number of sewage treatment plants increased to 122. In 2000, there were more than 400 sewage treatment plants. In June 2010, the number of sewage treatment plants became 2389. . After the amount of sewage treatment increases, a large amount of sludge is produced. Sludge is the product of sewage treatment, which is an extremely complex heterogeneous body composed of organic debris, bacterial cells, inorganic particles, colloids, etc. The main characteristics of sludge are high water content (up to 99%), high content of organic matter, ea...

Claims

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Application Information

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IPC IPC(8): C02F11/12
Inventor 宋功业
Owner JIANGSU VOCATIONAL INST OF ARCHITECTURAL TECH
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