Biological and physical combined sludge drying device

Abstract

The invention provides a biological and physical combined sludge drying device. The device comprises a feed system, a drum drying reactor body, a gas supply system, a gas distribution pipe and a temperature and humidity online detection feedback system. In the device, while sludge is fed, the sludge entering a drum is directly preheated to over 50 DEG C by utilizing residual heat of a sewage plant; and the interlayer between an inner drum and an outer drum is separated into a gas distribution chamber to remove dead angles of gas distribution. The thermal insulation performance is reinforced by the inner drum and outer drum dual-layer design, moisture in the air is quickly eliminated outside the reactor by virtue of alternating bottom gas supply and top gas extraction, moisture in the air is prevented from condensing back to a matrix; and the aims of reducing sludge drying energy consumption, shortening drying retention time and reinforcing moisture removing effect can be realized by the drum dynamic rotation design and by constantly shoveling and mixing a material with a built-in shoveling plate, detecting temperature and humidity on line and feeding back air ventilating conditions, so that the technical problems of environmental pollution, low thermal efficiency, high energy consumption, sludge agglomeration and wall sticking of pure physical thermal drying can be solved. Therefore, the biological and physical combined sludge drying device has wide application prospect.

Description

technical field [0001] The invention relates to a device for drying dewatered sludge by using biomass energy to self-generate heat, in particular to a biophysical drying device for dewatered sludge in urban sewage treatment plants, and belongs to the field of solid waste treatment and resource utilization. Background technique [0002] With the rapid increase of sewage treatment volume, sludge production has increased rapidly. Sludge is highly viscous and water is difficult to remove. After gravity concentration and mechanical dehydration, the water content is still as high as 85%. The cost of its treatment and disposal accounts for the operating cost of the entire sewage plant and increases year by year. The treatment and disposal of sludge has become a difficult point in the environmental field. . [0003] Sludge has a high content of organic matter and has high economic value, but its high water content limits its subsequent treatment, disposal and resource utilization. ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a device for removing moisture in sludge, which overcomes the disadvantages of fossil fuel consumption, easy agglomeration of sludge, low heat transfer efficiency, and high energy consumption in existing sludge thermal drying technology

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