Sludge low-temperature drying machine and using method thereof

Abstract

The invention discloses a sludge low-temperature drying machine and a using method thereof. The sludge low-temperature drying machine is composed of a heat pump chamber, a sludge drying chamber, an air supply pipeline and an air return pipeline, wherein the air supply pipeline and the air return pipeline are connected with the heat pump chamber and the sludge drying chamber. Circulating hot air dehumidification and dehumidified dry air temperature rise are achieved in the heat pump chamber through transfer circulation of a working medium in a heat pump system. Feeding sludge in the sludge drying chamber is evenly laid on a conveying mesh belt after being cut into strips and formed twice, circulating hot air makes direct contact with the cut sludge, heat for evaporating water is provided, water in the sludge is taken away, and the sludge is dewatered and dried. Hot air circulates between the sludge drying chamber and the heat pump chamber through the air supply pipeline and the air return pipeline. According to the sludge drying machine, two sludge slitting and forming devices are arranged to form sludge twice, so the forming effect is good, sludge drying is facilitated, and compared with a traditional sludge drying machine, the sludge drying machine can better adapt to to-be-treated sludge with the high water content.

Description

technical field [0001] The invention belongs to the technical field of sludge drying treatment, and in particular relates to a low-temperature sludge drying machine and a use method thereof. Background technique [0002] With the continuous improvement of the level of urbanization in our country, the construction of sewage treatment facilities has developed rapidly, and the capacity of urban sewage treatment has increased rapidly. At the same time, the construction and operation of sewage treatment plants has produced a large amount of surplus sludge. The serious phenomenon of "heavy water and light mud" has resulted in a large amount of sludge not being properly and safely treated and disposed of. Moreover, the sludge has high moisture content, high organic matter content, unstable properties, easy to rot and smell, and contains toxic and harmful substances such as pathogenic bacteria, parasite eggs and heavy metals. If the remaining sludge is not effectively treated and di...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the prior art equipment has high requirements on the initial dryness of the sludge, poor sludge cutting and forming will affect the drying effect, difficult maintenance of equipment, low processing capacity of a single unit, and uneven air distribution of hot air and long-term high-pressure operation of heat pump compressor units, etc., which affect the convenience, effect and life of the equipment, as well as further optimization and improvement on some details

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