Sludge drier and drying method

Abstract

The invention relates to a sludge drying machine and a drying method. The sludge drying machine includes a cavity, a horizontally arranged material bed located in the cavity, and a driving device for driving the horizontal rotation of the material bed; the material bed is a rotating hollow cylinder structure, and the upper and lower bottom plates of the material bed A circular baffle plate coaxial with the material bed is arranged horizontally between them, and the internal space of the material bed is divided into upper and lower layers; the diameter of the circular baffle plate is smaller than the diameter of the material bed; a The heat medium pipeline is perpendicular to the material bed; the surface of the cavity is provided with a sludge inlet, a drying flue gas outlet, and a sludge outlet; wherein the flue gas outlet is close to the sludge inlet. The invention solves the problem of severe wear and tear on the device by the sludge with large sand content; and does not generate a large amount of dust in the drying process, does not have the danger of explosion, does not need to control the oxygen content in the furnace; and does not have the problem of blockage and jamming.

Description

technical field [0001] The invention relates to a sludge drying machine and a drying method, belonging to the technical field of solid waste resource treatment. Background technique [0002] Sludge is a kind of solid organic waste with extremely high water content. Even the sludge that has been pretreated by concentration and centrifugation has a water content of about 80%. Sludge treatment generally includes front-end drying treatment and terminal disposal. Terminal disposal technologies such as sludge landfill require a moisture content of less than 60%, and sludge incineration requires a moisture content of about 40%. Therefore, no matter what kind of terminal disposal technology is adopted, the key point of the technology lies in how the front-end can remove the moisture in the sludge simply, efficiently and energy-saving so that the raw materials can meet the final disposal requirements. [0003] At present, thermal drying technology is mainly used for sludge drying, b...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a sludge drying machine and a drying method. During the drying process, no sealing device is required, and the sludge is kept in a static state relative to the material bed, thereby solving the problem of sludge causing the drying device The problem of serious wear and clogging, avoiding the generation of a large amount of dust, no risk of explosion, and realizing large-scale industrial treatment of sludge drying

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