Pyrolysis reaction system and method for pyrolyzing oil shale

Abstract

The invention discloses a pyrolysis reaction system and a method for pyrolyzing oil shale. The pyrolysis reaction system comprises a pyrolysis reactor and a horizontal tube condenser; the pyrolysis reactor performs pyrolysis treatment by adopting a regenerative radiant tube, therefore, quick pyrolyzing of oil shale powder materials can be achieved, the oil gas yield is high, and the reaction system is simple in structure and convenient to operate; meanwhile, a stirring assembly is installed in the pyrolysis reactor, therefore, the materials are distributed evenly in the reactor and pyrolyzed more fully, and oil gas generated through pyrolysis can be released out more quickly; in addition, a gas extraction umbrella is arranged at a pyrolysis oil gas outlet of the pyrolysis reactor, therefore, the oil gas generated through pyrolysis can be quickly guided out, secondary cracking of the oil gas is effectively inhibited, and the shale oil yield is increased; shale oil can be obtained after the pyrolysis oil gas is condensed through the horizontal tube condenser. According to the pyrolysis reaction system, the structure is simple, and the pyrolysis efficiency and the shale oil yield are high.

Description

technical field [0001] The invention relates to a pyrolysis reaction system and a method for pyrolyzing oil shale by using the pyrolysis reaction system. Background technique [0002] Oil shale is a kind of organic sedimentary rock with schistotic structure, which is a low calorific value solid fossil fuel, also known as oil shale. Oil shale contains two kinds of organic matter: one is kerogen (or kerogen), an organic polymer substance, insoluble in common organic solvents; the other is bitumen, soluble in organic solvents, and its content does not exceed the total mass of oil shale 1%. The inorganic matter content in oil shale is generally above 50%, most of which are carbonate rocks, quartz and other substances. In the absence of air or oxygen, the oil shale is heated to about 500°C (that is, during dry distillation), and the kerogen is pyrolyzed to obtain shale oil, dry distillation gas, solid carbon-containing residue and a small amount of pyrolysis water. Shale oil c...

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Problems solved by technology

Most of domestic oil shale pyrolysis process is Fushun furnace. Fushun retort furnace can process lean mineral oil shale, and has its unique advantages of small investment and fast construction. However, Fushun retort furnace can only process massive oil shale. As a result, the utilization rate of shale is not high, and it is heated by the gas heat carrier, which leads to the dilution of retort gas, low calorific value, and difficulty in utilization. Moreover, the yield of Fushun furnace oil is low

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