Sludge conditioning and dewatering treatment system and method

Abstract

The invention discloses a sludge conditioning and dewatering treatment system. By the system, conditioner is added into sludge discharged by a sewage treatment plant, the conditioned sludge is sent to a high-pressure filtering device and is treated, and a produced mud cake is sent to a cement plant and is co-combusted for manufacturing cement. The system comprises a wet sludge storage bin, a sludge conveying pump, a slurry supply pump, a dry sludge storage bin, and dry sludge conveying equipment; the sludge conveying pump is connected with the wet sludge storage bin and a sludge conditioning tank respectively; the slurry supply pump is connected with the sludge conditioning tank and sludge dewatering equipment respectively; wastewater produced by the sludge dewatering equipment enters a wastewater treatment system and then is treated, and the treated wastewater which meets the standard is discharged; the dry sludge storage bin is connected with the sludge dewatering equipment to receive the separated dry sludge; and the dry sludge conveying equipment is connected with the dry sludge storage bin and is used for conveying the dry sludge into a loading system of the cement plant. By the sludge conditioning and dewatering treatment system, the sludge treatment cost can be effectively reduced, a large amount of high-quality energy sources can be saved, and treatment of wastes with processes of wastes against one another is realized. The invention also discloses a sludge conditioning and dewatering treatment method.

Description

technical field [0001] The invention relates to the field of solid waste treatment in the field of environmental protection, in particular to a sludge treatment and disposal system and a sludge treatment and disposal method using the system. [0002] Background technique [0003] Sludge is an inevitable product of sewage treatment in urban sewage treatment plants. It is huge in quantity, complex in composition, difficult to treat, and the cost of sludge disposal is also relatively high. The purpose of sludge treatment is to achieve reduction, stabilization, harmlessness and recycling. More mature sludge treatment methods include landfill, composting and incineration. [0004] Incineration is to fully burn the combustible components in the sludge at high temperature, and finally become stable ash. The incineration method has the advantages of high volume reduction, high weight reduction rate, fast processing speed, complete harmlessness, and waste heat can be used for power...

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Problems solved by technology

[0006] The controversial issues mainly focus on the water content and addition rate of sludge have a great influence on the thermal efficiency of cement kiln. The higher the water content of sludge, the lower the calorific value and the smaller the thermal contribution rate. The thermal contribution rate to the cement kiln is very low, and the utilization rate of the calorific value of direct incineration of dewatered sludge is extremely low. Not only can the calorific value of the organic matter in the sludge not be utilized, but also a large amount of high-quality fuel needs to be supplemented as a combustion aid

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