Screw type pneumatic drying machine and method

Abstract

The invention relates to a screw type pneumatic drying machine and method. The screw type pneumatic drying machine comprises an airtight drying machine body (3), wherein the drying machine body (3) comprises a first end part (31), a second end part (32) and a shell (33); the first end part (31) and the second end part (32) are oppositely arranged, and the first end part (31); the first end part (31) and the second end part (32) are connected through the shell (33); and the second end part (32) and the shell (33) form an airtight working space. The drying machine also comprises a screw propulsion unit (2), a wet sludge feed port (1), high temperature smoke inlet (7) and a low temperature smoke outlet (4), wherein the screw propulsion unit (2) is installed in the working space; the wet sludge feed port (1) and the high temperature smoke inlet (7) are respectively arranged on the drying machine body (3); and the low temperature smoke outlet (4) is arranged on the drying machine body (3) and penetrates through the shell (33). The device and method are suitable for drying sludge, and have the advantages that the operation is continuous, the labor intensity is low, and the heat consumption is low.

Description

Spiral airflow drying device and method technical field The invention relates to a drying device and a drying method for sludge disposal. Background technique Sludge is the product of sewage treatment. Due to its high water content, complex composition, and more organic matter, it has a certain viscosity. At present, the disposal methods of sludge are mainly landfill and composting. Landfill disposal method will occupy a large amount of land resources and easily cause secondary pollution. According to the methods of sterilization and aging, compost has different fertilizer efficiency and safety. This disposal method can achieve the purpose of recycling, but the processing process is longer, and it will also occupy a large amount of land resources, and the disposal cost is also high; in addition, Sludge containing harmful components such as heavy metals should not be disposed of in this way. After drying, the sludge can be greatly reduced, harmless and resourceful. The ...

AI Technical Summary

Problems solved by technology

At present, there are various types of drying devices, but due to the viscosity of sludge itself and its inherent characteristics, there are not many drying devices that can be directly applied to sludge drying

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