Reflux type temperature controllable sludge drying device and method

A sludge drying and sludge technology, applied in the direction of dewatering/drying/concentrating sludge treatment, can solve the problems of large energy consumption, high operating costs, complex sludge composition, etc., and achieve obvious economic benefits.
CN1587127AInactive Publication Date: 2005-03-02ZHEJIANG UNIV
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG UNIV
Publication Date
2005-03-02
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The present invention discloses one kind reflux type temperature controllable sludge drying apparatus and method. Drying sludge in 5-20 % is mixed with wet sludge and through the sludge inlet with two, one transverse and one longitudinal, layers of cutting steel wires, sludge is cut into small blocks before entering into the rotary kiln. Inside the rotary kiln, sludge is thrown and crushed by the throwing plate and chain for fast heating to dry in the temperature controlled with the jetting blower. Hot sludge from the rotary kiln is blown with the cold wind blower to further dry. The dried sludge is crushed and sieved, sludge with size below 4 mm is pelletized for comprehensive utilization and large sized sludge is refluxed. The present invention can reach ideal drying effect while maintaining over 95 % of its organic matter components.
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Description

technical field

[0001] The invention relates to a return type temperature-controllable sludge drying device and method. Background technique

[0002] Industrial wastewater (including printing and dyeing, papermaking, leather, chemical and various mechanical industries) and domestic sewage after biochemical treatment, while the sewage is purified, will produce volume accounting for about 1% of the total sewage entering the sewage treatment plant In addition to concentrated inorganic and organic pollutants, this kind of sludge also contains a large number of pathogens and various heavy metal elements. Therefore, it is an important part of the sewage treatment system to safely and economically dispose of the sludge generated in sewage treatment. If the sludge is not properly treated, it will not only directly affect the normal operation of the sewage treatment system, but also give The environment brings secondary pollution. At present, the treatment of this kind of sludge at...

Claims

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