System and process for preparing light distillate oil from coal

Abstract

The invention relates to the technology for preparing light distillate oil through coal pyrolysis, and specifically relates to a system and a process for preparing light distillate oil from coal. The system comprises a feeding system, a reaction system, and a combustion system. A material is delivered into a reactor through a pressure-resistant screw conveyor, and is then delivered into a combustor through a U-shaped pipe; hot air heated by a hot stove is delivered into the combustor; combusted hot solid material is adopted as a solid heat carrier, and is delivered into the reactor through the U-shaped pipe for heating the material in the reactor; the material in the reactor is subjected to fluidization and heat transfer through the high-temperature solid heat carrier, and is heated fast, such that a pyrolysis temperature is reached, and pyrolysis and catalytic cracking reactions are completed, such that light distillate oil and coal gas are obtained. The process is simple, the light oil is directly produced from coal, and no water pollution is caused. Therefore, an environment problem is solved, and economic benefit is increased.

Description

technical field [0001] The invention relates to a technology for producing light distillate oil from coal pyrolysis, in particular to a system and process for producing light distillate oil from coal. Background technique [0002] Distillate oil refers to the components with a certain distillation range (boiling point range) separated during the distillation of crude oil, such as liquefied gas, gasoline, kerosene, diesel and other fractions. The current domestic coal-to-oil technology can only produce heavy oil, and the recovery system is huge, water consumption is large, and pollution is serious. The foreign technology is complicated, and there is no technology to directly produce light distillate oil. [0003] The existing coal or heavy oil production of light oil adopts hydrogenation method, and the hydrogen used is obtained from the conversion of natural gas or petroleum gas, both of which are in short supply and costly. In addition, the production is under high temper...

AI Technical Summary

Problems solved by technology

[0006] my country's coal reserves rank first in the world, and there are relatively rich sources of coal tar, and coal tar contains more wash oil, anthracene oil and other thick and half-heavy aromatics, but due to the high content of sulfur and nitrogen in these oils, it is difficult to process them separately oil

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