Freeze thawing-grading vacuum pre-loading sludge treatment device and treatment method

Abstract

The invention relates to a freeze thawing-grading vacuum pre-loading sludge treatment device and a treatment method, the method comprises the following steps: (1) carrying out freezing-thawing cycle treatment on sludge to be treated in a sedimentation tank, and arranging a condenser pipe (1) for freezing the sludge to be treated in the sedimentation tank; and (2) carrying out vacuum drainage treatment on the sludge subjected to freezing-thawing cycle treatment in a vacuum solid-liquid separation tank, wherein a vertical drainage plate (9) for draining water in the sludge is arranged in the vacuum solid-liquid separation tank. Compared with the prior art, the device has a very good dehydration treatment effect on sludge with a high organic matter content, including sludge, has very small influence on the environment, and is simple and convenient in engineering construction; the device not only can be used in engineering geology, but also has good economic benefits and application prospects for environmental geo-technical engineering.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a freeze-thaw-grading vacuum pre-compression sludge treatment device and treatment method. Background technique [0002] Sludge treatment is a hot topic, but because of its high organic content, complex composition, and high moisture content, sludge has always been a "special soil" that is difficult to handle and dispose of. At present, the treatment of sludge is mainly focused on sanitary landfill, incineration as fuel, and soil improvement materials, etc., but the utilization of these resources requires sludge to be transported, and the huge volume of sludge will inevitably cause economic constraints. Therefore, The problems of deep drainage and volume reduction of sludge need to be effectively solved. [0003] Although the chemical vacuum preloading method has a significant treatment effect on general engineering waste slurry, it contains There are a large number of f...

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Problems solved by technology

[0006] The applicant's previous research on the "pharmaceutical vacuum preloading method" shows that there are still some shortcomings in the treatment of municipal sludge with very high organic matter content, complex microbial types, and high content of clay particles. : ①During the vacuum pre-pressing and vacuuming process of chemicals, a certain proportion of chemicals needs to be added. When the equivalent of mud is large, the amount of chemicals required is also large. Higher cost; ② The agents used in the pre-medication vacuum preloading method are usually some chemical reagents, including organic polymers, aluminum iron chloride, quicklime, sodium hydroxide, etc., which have certain effects on the treated rock and soil geological environment , may have a certain impact on sustainable development; ③For sludge with high organic matter and high clay particles, its permeability coefficient is very small, and silting is prone to occur near the drainage board, so the simple vacuum preloading method It is difficult to continuously drain the sludge. After understanding the above defects, the inventor proposes the following specific solutions:

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