Environment-friendly sludge drying device utilizing waste heat of thermal power plant

Abstract

The present application provides a kind of thermal power plant waste heat utilization sludge environmental protection drying device, including sludge pretreatment system, drying system, waste heat recovery system and circulating heat exchange system;Drying system includes multistage belt low-temperature drying box, and multiple low-temperature drying chambers are sequentially connected along horizontal direction and mutually independent temperature control, to carry out hierarchical continuous drying to sludge, separation and material transfer are realized by transition chamber and sealing door between each chamber, and the whole drying process is kept in full-closed heat preservation state and runs;Waste heat recovery system is used to recover thermal power plant boiler flue gas waste heat, steam turbine steam exhaust waste heat and condenser circulating cooling water waste heat respectively, and recovered waste heat is supplied to each drying chamber of drying system and sludge pretreatment system respectively;Circulating heat exchange system forms closed cycle connection with waste heat recovery system and drying system respectively.The device can effectively utilize low-grade waste heat of thermal power plant, greatly reduce sludge drying energy consumption, realize safe, environmental protection, continuous operation.

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