Solar sludge constant temperature drying harmless treatment device and method

Abstract

The invention discloses a solar sludge constant temperature drying and harmless treatment device and method. The device includes a hot water storage pool, a solar heat collection device, a sludge incineration device, a sludge drying device and a finished sludge storage device. The method includes: step A, collecting solar radiant heat through a solar heat collector, and then transferring the heat into a hot water storage tank; step B, transporting the sludge to be treated into an oven, and collecting the waste gas generated by drying through the drying waste gas The device collects and sends it to the hot water storage tank through the pipeline, and the soluble gas in the waste gas is dissolved in the water through aeration; step C, the sludge is dried and transported into the finished sludge storage tank in a closed manner, and a combustion aid is added to carry out Stirring; step D, after stirring evenly, the sludge is sent to the incinerator for combustion, which can provide heat for the hot water storage pool, and the remaining waste residue after combustion can be used as building materials for resource disposal. The invention truly realizes the goals of reduction, harmlessness and resource utilization of sludge treatment.

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...

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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 thermal drying or incineration

[0006] The existing thermal drying technology is to burn coal, natural gas or electric heating to generate a large amount of heat to heat the sludge to remove water, but this method will consume a lot of energy during the drying process, and the drying temperature is too high, making the sludge The organic substances in the sludge, especially the release of volatile substances such as benzene, chlorophenol, ammonia, etc., endanger the environment and cause secondary pollution in the process of sludge treatment

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