Disk type anti-explosion and safe drying machine

Abstract

The invention relates to a disk type anti-explosion and safe drying machine which comprises a shell. A stirring shaft is arranged in the shell, disk pieces are arranged on the stirring shaft at intervals, a sludge inlet and a steam outlet are formed in the top of the shell, a dry sludge outlet is formed in the bottom of the shell, the stirring shaft is driven by a motor which is arranged at one end of the stirring shaft, the stirring shaft is of a hollow structure, and one end of the stirring shaft serves as a hot steam inlet and is provided with a condensation water draining pipe in an inserted mode; the shell comprises a semicircular cylinder and a dome, the stirring shaft is arranged on the semicircular cylinder, the semicircular cylinder is coaxial with the stirring shaft, and the upper side of the semicircular cylinder extends upwards to form the dome; a section structure of the shell is that the distance between the top end of the dome and the center of the semicircular cylinder is 1 to 2 times of the radius of the semicircular cylinder; a plurality of upper partition plates and lower partition plates are arranged at the top of the dome at intervals along the axial direction of the stirring shaft, and dust guide gaps are formed between the upper ends of the lower partition plates and the inner top surface of the dome.

Description

technical field [0001] The invention relates to the field of sludge treatment equipment, in particular to the technical field of sludge drying, in particular to a disc type explosion-proof safety drying machine. Background technique [0002] A large amount of sludge will be produced after urban domestic sewage treatment. If the sludge cannot be treated in a timely, effective and stable manner, it will bring great hidden dangers to the urban environment and the safety of people's lives. In addition, industrial processes such as papermaking, chemical industry, tanning, printing and dyeing, and dredging of rivers and lakes will also produce a large amount of sludge. [0003] The reduction and harmlessness of sludge has become a major environmental protection problem that must be solved in the process of urban scientific development. The moisture content of the sludge produced in the sewage treatment plant is still as high as 80% after dehydration, and the volume and quality ar...

AI Technical Summary

Problems solved by technology

As the drying progresses, the moisture content of the sludge decreases, the volume decreases, and it is easy to adhere to the surface of the hot wall, which is not conducive to the uniform mixing of the sludge and the renewal of the evaporation surface

After the moisture on the surface of the sludge evaporates, it will form a crust. Due to the low heat transfer coefficient of the sludge shell, if the sludge shell cannot be broken, the heat transfer efficiency of the sludge in the shell will also decrease, resulting in the comprehensive heat transfer of the dryer. Lower thermal coefficient

At the same time, the rate of mass transfer of moisture in the sludge to the outside through the sludge shell is also significantly reduced, resulting in a decrease in the drying rate of the sludge and restricting the processing capacity of the sludge dryer.

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