Process unit for removing dust and recovering oil from pyrolysis high-temperature oil gas

Abstract

The invention discloses a process unit for removing dust and recovering oil from pyrolysis high-temperature oil gas. The process unit comprises a spiral electric dust collector, a secondary-primary cyclone dust collection device which is provided with a high-temperature pyrolysis gas inlet and a Venturi dust collection device which is provided with a gas phase hole, a wash oil inlet and a purified pyrolysis gas outlet for discharging purified pyrolysis gas, wherein the spiral electric dust collector comprises insulating porcelains, an inclined cylinder and a spiral spring-shaped spiral barbed wire; a heat preservation and insulation layer, a spiral electric dust collector inlet and an electric dust collector collected dust outlet are arranged on the outer wall of the cylinder; the insulating porcelains are mounted at both the front and rear ends of the cylinder; the spiral barbed wire is arranged between the insulating porcelain; a purge gas inlet and an electric dust collection purified gas outlet are respectively formed in insulating porcelain mounting cavities at the front and rear ends; the spiral electric dust collector inlet is connected with a plurality of secondary cyclone purified as outlets of the secondary-primary cyclone dust collection device; and the electric dust collection purified gas outlet is communicated with the gas phase hole of the Venturi dust collection device. According to the process unit, the dust collection rate of the pyrolysis oil gas is up to 99.98% and the solid content of the recovered coal tar is less than 0.4%.

Description

technical field [0001] The invention belongs to the fields of coal chemical industry, oil shale and biomass pyrolysis, and in particular relates to a process device for pyrolyzing high-temperature oil and gas to remove dust and recover oil. Background technique [0002] my country is rich in coal and less in oil, and coal resources are relatively abundant, but at present most of the coal resources are directly used as fuel for power generation; on the other hand, with the rapid growth of my country's economy, the demand for fuel oil continues to increase, so many domestic research institutes and enterprises have developed Pulverized coal (or oil shale) pyrolysis upgrading process, and some process devices have been industrialized. Producing coal tar with high value-added hydrogen-rich components before coal combustion or gasification is beneficial to comprehensive utilization of coal resources, reduction of nitrogen oxides and sulfide emissions in waste gas, improvement of co...

AI Technical Summary

Problems solved by technology

However, although there are many pulverized coal pyrolysis processes developed in China, at present, the oil and gas produced by pyrolysis have a large dust content. (dust) is difficult to separate, and the high value-added coal tar produced by pyrolysis cannot be recycled into sludge, which is easy to cause blockage of equipment, pipelines, valves, etc., and cannot operate stably for a long period of time, which restricts the extraction of coal tar by pyrolysis of pulverized coal Craft Path Development

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