DESCRIPTION

Complete Sludge Dewatering and Drying System

The centrifugal sludge dewatering and drying equipment produced by our company, usually used for sludge thickening and dewatering, is mainly composed of a LW series decanter centrifuge (or screw press), a full-automatic flocculant preparation and dosing device, a sludge crushing and cutting machine, a sludge feed pump, a dosing pump, a shaftless screw conveyor, a flowmeter, a control valve and a complete full-automatic control system. Characterized by advanced structure, reasonable configuration, high degree of automation, continuous airtight operation, safe and reliable operation, etc., it is applicable to the treatment of municipal sewage, rural sewage, hospital sewage, etc. as well as various types of industrial sewage.

SYSTEM WORKING PRINCIPLE

The mixed sludge from the municipal sewage that has undergone primary sedimentation and secondary sedimentation normally has a solid content of about 2-3%. It is then dewatered and thickened with a decanter centrifuge (or belt filter, screw press) and the discharged sludge has a moisture content of about 80-85%. Later, the sludge enters the sludge low-temperature heat pump heating and dehumidification equipment for dehumidification and drying, and the moisture content of the treated sludge drops to about 30%. Thus, the harmless treatments of the sludge, such as incineration or utilization after pyrolysis, can be conducted.

TREATMENT PROCESS

DCS CONTROL

SCOPE OF APPLICATION

For a long time, due to the stress on water treatment and the ignorance of sludge treatment, at present, only about 30% of the sludge is safely disposed of. Large amounts of wet sludge are transported out randomly, simply landfilled or piled up. Exposed to the air, the sludge is prone to stink and attract mosquitoes, and cannot be used as fertilizer. 

The requirements of the Action Plan for Prevention and Treatment of Water Pollution and other relevant national laws and regulations for sludge treatment and disposal have continued to increase in recent years. Therefore, the sludge shall further undergo stable and harmless resource treatment and disposal, and the moisture content of sludge for landfill, incineration, land use, etc. shall be lower than 60%.