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Solid product is sludge drying the residue after pyrolysis, its structure is wet, so the slag device need to set the blockage prevention measures. In addition, pyrolysis residue chemical performance is stable, can resist the corrosion of strong acid, the heavy metals in the sludge is curing in which it is difficult to precipitate again. Pyrolysis of pyrolysis gas and sludge storage warehouse after cyclone exhaust into the combustion chamber combustion together, so that we can prevent the leakage of peculiar smell. Heating of the combustion chamber to produce first used for pyrolysis of flue gas drum, pyrolysis drum outlet flue gas temperature is 600 ℃, this part of the flue gas enters the waste heat utilization of waste heat boiler. When the sludge drying system is unable to maintain their own energy balance, the combustion chamber to plus fuel (natural gas or oil) as a supplement, in order to achieve the purpose of maintaining the energy balance of the sludge drying system.
After heated the pyrolysis gas into the waste heat boiler, the steam is used for drying the sludge. For different process conditions, can choose different energy recovery scheme. Solid waste pyrolysis under normal pressure, but in fact, in order to avoid the odor leakage, to maintain a certain amount of negative pressure within the pyrolytic drum.