Sludge dryer

Abstract

The invention relates to a sludge dryer which comprises a drying chamber and a circulating air heating chamber, wherein a hot air inlet is arranged at the top of the drying chamber, a circulating air outlet and a supplementary air inlet are arranged in positions close to the bottom of the drying chamber, a supplementary air outlet is arranged at the bottom of the drying chamber, and multiple layers of stainless steel mesh-belt conveyer tables are arranged in the drying chamber; a hot air outlet is arranged at the top of the circulating air heating chamber, a mixed air inlet is arranged at the bottom of the circulating air heating chamber, and a heat exchanger connected with a heat source is arranged in the circulating air heating chamber; the hot air outlet of the circulating air heating chamber and the hot air inlet of the drying chamber are communicated through an air duct provided with a draught fan and a waste discharge port; the circulating air outlet and the supplementary air outlet of the drying chamber are respectively communicated the mixed air inlet at the bottom of the circulating air heating chamber through air ducts. The sludge dryer can continuously operate to perform batch drying treatment on municipal domestic sludge, and has the remarkable advantages of short treatment cycle, high efficiency, good drying effect, stable and safe operation, environment friendliness, low energy consumption, high automation degree and the like, thus having excellent popularization and application prospects.

Description

technical field [0001] The invention relates to a sludge treatment device, in particular to a sludge drying machine, which is used for efficient drying treatment of pretreated and formed sludge materials in batches. Background technique [0002] With the development of urban construction and the improvement of living standards, the generation of urban domestic sludge is also increasing, and the long-term accumulation will greatly affect the urban environment and air quality. At present, the methods of batch treatment of municipal domestic sludge are generally physical methods and biochemical methods. The physical method is generally drying treatment, that is, removing most of the water contained in the sludge, and then performing harmless treatment on the remaining slag. be processed or diverted to other uses. Compared with biochemical treatment, physical drying treatment has significant advantages, such as small footprint of treatment equipment, short treatment cycle, and ...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is: in order to solve the problems of unsatisfactory drying treatment effect, high energy consumption and poor operation stability of the current sludge drying treatment equipment, and provide a kind of drying treatment effect, Sludge dryer with low energy consumption and good operation stability to meet the demand

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