Dry fermentation bed system for municipal sludge

Abstract

The invention relates to a dry fermentation bed system for municipal sludge. The dry fermentation bed system comprises a dry fermentation bed, wherein the dry fermentation bed comprises a dry pretreatment zone, a fermenting degradation zone and an aging stabilization zone which are sequentially arranged and are arranged in a stepped manner from high to low; a plurality of screw conveying devices which are uniformly arranged in parallel are arranged in the dry pretreatment zone; distributing mechanisms are respectively arranged in the fermenting degradation zone and the aging stabilization zone. According to the dry fermentation bed system disclosed by the invention, the dry pretreatment zone, the fermenting degradation zone and the aging stabilization zone in the whole dry fermentation bedare arranged in a continuous and sequentially-reduced stepped form, and transfer of materials is facilitated; pavement and pushing transfer of the materials can be smoothly realized by the screw conveying devices and the distributing mechanisms.

Description

technical field [0001] The invention relates to an urban sludge drying and deodorizing fermentation treatment device, in particular to an urban sludge drying and fermentation bed system. Background technique [0002] Municipal sludge is the product of urban 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 organic content, easy to rot and smell, and the particles are relatively small, colloidal liquid, which is between solid and liquid Thick matter can be transported by pump, but it is difficult to separate solid and liquid by sedimentation, and it is not easy to dry naturally. [0003] The characteristics of sludge determine the hazards of sludge. If it is not treated properly, it will occupy a large amount of land and form swamps, pollute groundwater and produce odors that pollute the atmosphere, affe...

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Problems solved by technology

Among them, the sludge is transferred from the drying pretreatment area to the fermentation degradation area, and from the fermentation degradation area to the aging stable area, all of which use cloth turning and throwing devices, but the structure of the cloth turning and throwing devices has many problems in actual use. Problems: 1. The efficiency is low, and it takes more time during the material transfer process; 2. During the material processing process, especially in the drying pretreatment area, there is serious hardening, which leads to the failure of the material turning and throwing device to work normally ;3. The height of the material turning and throwing device cannot be adjusted and cannot meet the actual needs. There are serious obstacles in the turning and throwing of the material. When the height and thickness of the material are not suitable, the material turning and throwing device cannot work normally.

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