Dry distillation and liquefying method for coal

A dry distillation and coal technology, applied in the field of coal chemical industry, can solve the problems of difficult recycling and reuse of molybdenum-based catalysts, high industrialization cost, and difficult separation of products, so as to reduce the cost of coal-to-oil conversion, low cost, and low operating pressure Effect
CN102391886AInactive Publication Date: 2012-03-28CHANGAN UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
CHANGAN UNIV
Publication Date
2012-03-28
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a dry distillation and liquefying method for coal. The method comprises the following steps of: 1, mixing a coal raw material, a catalyst and a cocatalyst uniformly, and crushing the mixture to obtain catalyst-carrying coal powder; 2, mixing and preheating the catalyst-carrying coal powder by adopting semi-coke powder, putting the coal powder into a pyrolysis reactor, performing pyrolysis reaction, and obtaining solid semi-coke powder and mixed gas; 3, filtering and cooling the mixed gas under normal pressure, and obtaining tar and coal gas; 4, transforming and separating the coal gas to obtain hydrogen and residual gas by adopting a conventional synthesis gas transforming process, and introducing the hydrogen into the pyrolysis reactor for recycling; and 5, eluting the residual gas through methanol to obtain hydrogen sulfide, and introducing the hydrogen sulfide into the pyrolysis reactor to substitute the elementary sulfur cocatalyst for recycling. Hydrogenation and pressure application are adopted in the dry distillation process, and the coal is liquefied by adopting the cheap nano iron series catalyst; and the method is low in operating pressure, low in cost and high in liquid yield, and has significance for reducing the coal-to-oil transformation cost.
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Description

technical field

[0001] The invention belongs to the technical field of coal chemical industry, and in particular relates to a coal dry distillation liquefaction method. Background technique

[0002] my country is rich in coal resources, but oil resources are relatively scarce. In recent years, due to fluctuations in oil prices, in order to reduce dependence on oil, the technology of using coal to oil has been widely valued by domestic scholars. The traditional dry distillation method is used to process raw coal, and the tar obtained is less and the oil yield is low. However, direct coal liquefaction and indirect liquefaction to produce oil have high cost, large investment, high energy consumption, and the products are difficult to separate.

[0003] Zhu Zibin from East China University of Science and Technology used hydrogenation and pressurization technology to liquefy coal, but the oil yield was not high. Li Baoqing from the Shanxi Coal Chemical Institute of the Chinese ...

Claims

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