Stirring device capable of realizing cascading fermentation of solid waste and reactor

Abstract

The invention discloses a stirring device capable of realizing cascading fermentation of solid waste and a reactor. The stirring device comprises a center shaft, a conveying screw and a plurality of stirring blades, wherein the conveying screw is used for axially pushing materials, is concentrically fixed on one side of the center shaft and extends from the shaft end to the middle of the shaft in tapered manner; the stirring blades and the conveying screw are coaxially fixed on the other side of the center shaft. The stirring device can be arranged in a barrel to form the reactor used for the solid waste. The layout standard of the stirring blades is that the axial thrust along the center shaft is not generated in the rotation process. Thus, a layered fermentation system can be formed in the reactor. The system can greatly reduce the mixing ratio of new and old materials, effectively control the standing time of solid materials in the reactor, improve the degradation efficiency of output materials, and increase the final product quality.

Description

technical field [0001] The invention belongs to the field of solid waste treatment, and in particular relates to a stirring device and a reactor capable of realizing layered fermentation of solid waste. Background technique [0002] Since the reform and opening up, my country's industrialization and urbanization have developed rapidly, and the production and domestic solid waste production has long ranked first in the world. A scientific and systematic waste management and safe disposal system has not yet been formed, and the cumulative stockpiles have exceeded 20 billion tons. In particular, the current economic development has entered a new normal, and the amount of solid waste generated has surged. For example, the annual production of industrial solid waste exceeds 3 billion tons, and the comprehensive utilization rate is about 60%. The annual increase of 1 billion tons of heavily polluting solid waste has not been effectively disposed of; the annual urban solid waste pr...

AI Technical Summary

Problems solved by technology

[0007] The core problem of in-situ fermentation of solid waste is the long residence time of the material and the uneven maturity of the material. , the axial mixing rate between materials is high, resulting in the inability to accurately control the residence time of materials

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