Solar constant-temperature-drying harmless sludge treatment device and method

Abstract

The invention discloses a solar constant-temperature-drying harmless sludge treatment device and method. The device comprises a heat storage water pool, a solar heat collecting device, a sludge incineration device, a sludge drying device and a finished sludge storage device. The method comprises the steps: (A) collecting solar radiation heat by the solar heat collecting device, and transferring the heat into the heat storage water pool; (B) conveying sludge to be treated into a baking oven, collecting exhaust gas generated by drying by a drying exhaust gas collection system, and conveying the collected exhaust gas into the heat storage water pool through a pipeline, so as to dissolve soluble gases in the exhaust gas into water by means of aeration; (C) after drying, conveying the dried sludge into a finished sludge storage tank in a closed manner, adding a combustion improver and stirring; (D) after uniformly stirring, conveying the sludge into an incinerator for combustion, wherein heat can be supplied to the heat storage water pool, and remaining waste residues, obtained after combustion, can be subjected to resourcing disposal as building raw materials. According to the device and the method, the aims of volume reduction, harmlessness and resourcing for sludge treatment are truly realized.

Description

technical field [0001] The invention relates to a device and a method for treating sludge generated in a sewage treatment plant. Background technique [0002] With the popularization of urban sewage treatment, the sludge produced by urban sewage treatment plants has increased a lot. Due to the characteristics of high moisture content, large volume, easy pollution, and complex composition of sludge, it is easy to cause problems in stacking, transportation, storage, and utilization. Many troubles have come, and various problems caused by sludge treatment have attracted more and more people's attention. [0003] The common characteristics of sludge are high water content, large volume, difficult to handle, complex components, containing a large amount of organic substances, toxic and harmful heavy metals, pathogenic microorganisms, parasite eggs, salts and radionuclides and other refractory substances. [0004] The most critical indicator of sludge treatment is the water conte...

AI Technical Summary

Problems solved by technology

Through research, it is found that the moisture composition in sludge is complex, including interstitial water, surface adsorption water, capillary bound water and internal bound water. Interstitial water and surface adsorbed water are easier to remove and can be treated by mechanical dehydration (such as belt filter press) , centrifugal dehydrator, chamber filter press, etc.), but capillary bound water and internal bound water are difficult to remove, and cannot be removed by mechanical dehydration, and can only be removed by therma

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