Sludge treatment and disposal system and method

Abstract

The invention discloses a sludge treatment and disposal system, which is used for conveying dewatered sludge discharged by a sludge plant to a coal fired power plant to be combusted in a blended way after the dewatered sludge is dried. The sludge treatment and disposal system comprises a wet sludge storage bin, a sludge dryer, a sludge feeding pump, a cyclone dust collector, a dried sludge storage bin, dried sludge conveying equipment and a draught fan. The sludge feeding pump is respectively connected with the wet sludge storage bin and the sludge dryer. The cyclone dust collector is communicated with the sludge dryer so as to perform gas-solid separation on dried sludge and waste gas of the dryer. The dried sludge storage bin is connected with the cyclone dust collector so as to receivethe separated dried sludge. The dried sludge conveying equipment is connected with the dried sludge storage bin and used for conveying the dried sludge to a coaling system of the coal fired power plant. The draught fan is connected with a waste gas hole of the cyclone dust collector. According to the sludge treatment and disposal system disclosed by the invention, the sludge treatment and disposal cost can be effectively reduced; vast high-quality resources can be saved; and a way of using waste to treat waste is realized. The invention further discloses a sludge treatment and disposal 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. Background technique [0002] 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. [0003] 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 generatio...

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Problems solved by technology

[0005] The main issue of the debate is that the water content and addition rate of sludge have a great influence on the thermal efficiency of the incineration boiler. The higher the water content of the sludge, the lower the calorific value and the smaller the thermal contribution rate. The sludge with a water content of 80% The heat contribution rate to power generation is very low, and the heat value utilization rate of direct incineration of dewatered sludge is extremely low. Not only can the heat value of organic matter in sludge not be utilized, but a large amount of high-quality fuel needs to be supplemented as a combustion aid

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