Method of fluidifying coal and its reactor equipments

Abstract

A process for liquefying coal includes such steps as making water-coal slurry or oil-coal slurry in contact with the mixture of CO, CH4 and air, liquefying reaction at 600-1100 deg.C, suddenly cooling to 400-450 deg.C, and separating and recovering various liquid products. Its advantages are unique and simple equipment, simple operation, high effect and low cost.

Description

technical field [0001] The invention relates to a coal liquefaction method and its reactor equipment, in particular to a new coal liquefaction method using coal-water slurry or oil-coal slurry and its reactor equipment Background technique [0002] The world's three basic energy sources come from solid fossil fuels coal, oil and natural gas. Coal is the most abundant solid fossil fuel in the world. It is distributed in countries all over the world, such as China, North America, Australia, South Africa, Russia, Europe, etc. There are a lot of storage and mining. However, people have always used solid raw coal as fuel and rarely processed it. Refining, unlike oil and natural gas, which is processed and refined before use to produce oil and fuel gas suitable for various purposes, greatly increases the added value, so it is widely used by people. So coal is still used in the form of solid raw coal. The main reason is that coal is solid, which is not easy to process, refine and ...

AI Technical Summary

Problems solved by technology

In the early days, the development of coal liquefaction technology required a large amount of investment and a large external supply of expensive hydrogen and oxygen. The hydrogen did not come from the coal itself, and it was accompanied by a large amount of CO 2 of greenhouse gases, so the cost is high and the efficiency is low

For example, U.S. Patent No. 5,336,395 discloses a method of coal liquefaction, which is carried out in two steps. First, the coal is mixed with CO and water, and pretreated at high temperature and pressure, and then the pretreated coal is mixed with a solvent and a catalyst. Liquid products are obtained by liquefying at higher temperature and hydrogen pressure. This method is complex in technology and harsh in conditions. It requires external supply of a large amount of hydrogen and high-pressure and high-temperature equipment, which requires large investment and high cost.

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