NON-CONTACT FLUE-GAS WASTE-HEAT SLUDGE DRYING SYSTEM

摘要

A non-contact flue-gas waste-heat sludge-drying system comprising a dryer (12), and further comprising: a coal saver (1), a high-temperature flue gas waste-heat recycler (2), and an air pre-heater (3) sequentially disposed in the flue according to the flow direction of the flue gas; the dryer (12) is provided with a heater; the high-temperature flue gas waste-heat recycler (2) is connected with the heater via a circulation pipe; a heat-transfer medium is disposed inside the circulation pipe, and a heat-transfer medium drive apparatus is disposed on the circulation pipe; the dryer (12) is connected with a sludge steam recycling system. The system utilizes the waste heat from the flue gas of thermal power plant boilers or other industrial boilers as heat source to further dehydrate and dry the dehydrated sludge from a waste water treatment plant so that the dried sludge can be used as fuel with a certain combustion heat value or be composted for further processing.