Sludge drying device and sludge drying method

Abstract

The invention discloses a sludge drying device, comprising an obliquely arranged drying cylinder; a feeding inlet is formed at the high-position end of the drying cylinder, and a flue gas inlet is formed at the low-position end of the drying cylinder; a hollow rotating shaft is rotatably arranged in the drying cylinder; one end of the hollow rotating shaft is in butt joint with the feeding inlet,and the other end of the hollowing rotating shaft is in butt joint with the flue gas inlet; a guide plate is arranged outside the hollow rotating shaft in a surrounding way; a plurality of sieve meshes are formed in the middle of the hollow rotating shaft; a plurality of filtering holes are formed at the positions, corresponding to the area of the sieve meshes, on the wall of the drying cylinder;a residue collecting barrel sleeves the exterior, corresponding to the area of the filtering holes, of the drying cylinder; a closed interlayer space is formed between the drying cylinder and the residue collecting barrel; a flue gas outlet is formed in the top of the residue collecting barrel; a first residue outlet is formed in the bottom of the residue collecting barrel. The invention also correspondingly provides a sludge drying method; the high-temperature flue gas generated by an incinerator is introduced into the drying cylinder for performing primary drying on sludge, and the high-temperature hot water obtained by carrying out heat exchange on the tail gas of the incinerator is introduced into a hot water pipeline for performing secondary drying on the sludge.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a sludge drying device and a drying method, which are used for sludge drying treatment. Background technique [0002] As environmental protection is paid more and more attention, people's attention to waste disposal methods is also rising. In the process of garbage disposal, wet garbage is often encountered, especially sludge. Improper treatment of the leachate will directly affect the environment. If the sludge is put into ordinary incinerators for direct treatment, it will inevitably affect the combustion efficiency, and even affect the stability of the operation of the incinerator or pyrolysis gasifier. Improper treatment will cause secondary pollution. Therefore, it is hoped to design a sludge drying device or method to effectively dry the sludge before combustion, further improve the efficiency of incineration, pyrolysis and gasification, and avoid secondary pollut...

AI Technical Summary

Problems solved by technology

[0003] One object of the present invention is to provide a sludge drying device, which realizes dehydration and grinding of sludge before combustion, and solves the problems of low efficiency and high energy consumption of direct combustion

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