A sludge fermentation and stirring device

Abstract

The invention relates to a sludge fermentation and stirring device, comprising a stirring main shaft and several stirring units fixedly arranged on the stirring main shaft; the stirring device is rotatably arranged in a sludge aerobic fermentation tower; A and B are alternately arranged in the tower. Two types of trays form the return movement path of the sludge material, and the inclination directions of the scrapers on different types of trays are set in the opposite direction; through the reasonable selection of the number of arms and the installation position, the torsion force of the stirring main shaft is optimized. ; By adjusting the size or inclination angle of each scraper to make the area of ​​the circular path formed by it the same, so that in each rotation cycle, the scraping amount of each scraper is the same, eliminating the accumulation of materials on the tray; this setting It also allows to reduce the layer height of adjacent trays; and can effectively reduce the torsion force on the stirring main shaft; by arranging rake assemblies between adjacent scrapers arranged at intervals or on one or some of the plurality of spiral arms, the Under the condition that the material transfer cycle remains unchanged, the frequency of turning over and oxygenation is doubled, and the total residence time required for the material to be fully fermented in the tower is shortened, thereby reducing the diameter and overall height of the tower equipment, and reducing the operating cost of the equipment.

Description

technical field [0001] The invention relates to the technical field of environmental protection equipment, in particular to a stirring device for a sludge aerobic fermentation tower. Background technique [0002] Sludge is a kind of solid waste with a wide range of sources. A large amount of sludge waste will be generated in the production operations such as sewage treatment, municipal river course, and sewer dredging. The industrial treatment and disposal methods of sludge are mainly landfill, composting (fermentation), natural drying and incineration. At present, the treatment and disposal of sludge in my country is still dominated by direct landfill, but this extensive treatment method not only requires a large amount of land resources, but also poses a serious threat to the ecological environment. [0003] Sludge composting and fermentation as a resource-based sludge treatment method has gradually attracted attention in recent years. Compared with other treatment and di...

AI Technical Summary

Problems solved by technology

However, if the diameter is too large, the main shaft of the mixing device will continue to bear a large torque, which is prone to fatigue fracture; a large tower height requires a lot of energy to realize the feeding of sludge and the reflux of sludge after fermentation

This makes the cost of the tower sludge fermentation process always high

Moreover, the existing stirring and turning devices are mainly oblique scraper-type stirring devices, which only realize turning and oxygenation during the process of pushing materials, which makes the materials be pushed forward once during each turning and oxygenation process , the overall oxygenation rate of the material is low, it is necessary to extend the residence time of the material by increasing the diameter or height of the tower, so as to ensure the aerobic fermentation time

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