An energy-saving sludge drying device for recovering waste heat

Abstract

The invention discloses an energy-saving sludge drying device for recovering waste heat, which comprises a drying furnace, a sludge tank is connected to the top of the drying furnace, a collection tank is connected to the bottom of the drying furnace, and A drying mechanism and a mud scraper are installed, the drying mechanism is arranged corresponding to the scraper, a gas waste heat recovery part is arranged outside the drying furnace, and a solid waste heat recovery part is arranged inside the collection tank; The gas waste heat recovery part includes an air outlet channel arranged in the sludge tank, the air inlet end of the air outlet channel communicates with the drying furnace, the air outlet end of the air outlet channel is connected with an air outlet pipe, and the air outlet pipe A heat conduction oil pipe is wound around the sludge tank. The invention can flatten the sludge to be dried to increase the drying area, and recover the heat in the gas generated by the drying sludge and the heat in the dried sludge, so that the heat can be utilized in multiple stages and the waste of resources can be reduced .

Description

technical field [0001] The invention relates to the technical field of sludge drying, in particular to an energy-saving sludge drying device for recovering waste heat. Background technique [0002] With the continuous increase of urban population and the improvement of domestic sewage treatment rate, the output of municipal sewage sludge has also continued to increase, and the environmental pollution of municipal sludge has become the focus of attention of the general public. It is an extremely complex heterogeneous body composed of organic debris, bacterial cells, inorganic particles, colloids, etc., and contains a large number of pathogenic bacteria and parasites (eggs), heavy metals such as copper and zinc, and other harmful substances. The sludge also contains high Therefore, in terms of the depth and breadth of its environmental hazards, municipal sludge is a kind of waste gas with huge pollution hazards. The treatment, disposal and comprehensive utilization of municipa...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the process of drying sludge is often used to remove most of the water content from the sludge by using seepage or evaporation. However, the existing sludge drying device needs to consume A large amount of heat, and the gas containing a large amount of heat and the solid containing a large amount of heat generated after sludge drying have not been well utilized in multiple stages, thus causing a waste of resources

Images