Indirect self-heating drying and oxygen-free pyrolysis system and method for oily sludge

Abstract

The invention belongs to the technical field of drying and pyrolysis of oily sludge and provides an indirect self-heating drying and oxygen-free pyrolysis system and a method for the oily sludge. The system and the method are used for solving the technical problems that waste gas and waste water, generated during the treatment of the oily sludge in the existing mode, easily cause secondary pollution to environments and energy consumption is caused due to the fact that fuels are required during the incineration of dried exhaust gas. The system comprises a bag-type dust collector, a continuous mixer, a disc granulator, a drying pyrolyzing furnace, a granule screening machine, a cooling screw conveyor, a powder material buffering bin, a smoke gas heat exchanger, a smoke gas adsorption tank, an oil gas heat exchanger, an oil gas condensing tower, a liquid circulation pump, a tower bottom condenser, a tower top noncondensable gas blower, an oil-water separating tank and an oil delivery pump. According to the system and the method, self-volatilized combustible oil gas and condensed recovered oil of the oily sludge are used for generating high-temperature smoke gas through incineration, heat carried by the high-temperature smoke gas is used for carrying out drying and oxygen-free pyrolysis on the oily sludge, the fuel is self-supplied, and the emission of waste gas, waste water and waste solid is low.

Description

technical field [0001] The invention belongs to the technical field of drying and pyrolysis of oily sludge, and in particular relates to an indirect self-heating drying and anaerobic pyrolysis system and method of oily sludge. Background technique [0002] Oily sludge (especially sludge produced by oil production enterprises, oil refining enterprises, coking enterprises, etc.) generally contains oil ~ 50% (wt), water content ~ 5% (wt), slag ~ 45% (wt); its main physical The properties are: large volume, high viscosity, high boiling point of oil, not easy to volatilize, etc. [0003] Existing oily sludge is mostly treated with drying equipment. After drying, the tail gas with odor and high humidity at ~100 °C is mostly dusted by a cyclone separator and then discharged into a boiler for incineration and deodorization. The advantage of this process is to reduce the amount of oily sludge. , the disadvantages are: ①After the boiler incinerates and deodorizes, high-temperature ex...

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Problems solved by technology

[0004] The present invention provides a kind of oily sludge to solve the technical problem that waste gas and waste water generated when the oily sludge is treated in the existing way are easy to cause secondary pollution to the environment and the tail gas after drying treatment needs fuel to incinerate, resulting in no energy saving. Mud indirect self-heating drying and anaerobic pyrolysis system and method

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