Sludge drying and dewatering system

Abstract

The invention relates to a sludge drying and dewatering system. The system comprises a disc drying system and a filter-pressing drying system, wherein the disc drying system comprises a casing, a stirring shaft is mounted in the casing, disc pieces are mounted on the stirring shaft in a spaced manner, a sludge inlet and a steam outlet are formed in the top of the casing, a dried sludge outlet is formed in the bottom of the casing, the stirring shaft is driven by a motor at one end, the stirring shaft adopts a hollow structure and has a hot steam inlet at one end, and a condensate delivery tube is inserted into the hot steam inlet; the filter-pressing drying system comprises a filter pressing system, a sludge inlet system connected with the filter pressing system, a vacuum pumping system, a hot water circulating system and a sludge output system, the sludge inlet system is connected with a sludge inlet end of the filter pressing system, the sludge output system is connected with a sludge outlet end of the filter pressing system, the vacuum pumping system is used for keeping the filter pressing system to be in a negative pressure state during filter pressing of sludge, and the hot water circulating system is connected with a steam outlet of the disc drying system.

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 sludge drying and dehydration system. 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 are relativel...

AI Technical Summary

Problems solved by technology

[0008] Aiming at the existing disc-type sludge drying equipment, after a long period of research, the applicant found that its fatal flaw is that the inside of the disc dryer is high temperature (100-180°C), high dust (sludge drying and The dust generated by rotary propulsion, dry sludge dust is combustible) air environment, and is in a frictional state, and there is a greater risk of explosion. Therefore, the present invention provides a sludge drying and dewatering system with high safety performance, and solves the problem of traditional sludge Low Energy Utilization Rate of Drying System

Images