Preparation method of high-concentration gasified coal water slurry

A gasification coal-water slurry and high-concentration technology, applied in the field of coal chemical industry, can solve the problems of low gasification efficiency and utilization of raw coal resources, and achieve the effects of improving resource utilization efficiency, good environmental and social benefits, and improving gasification activity
CN110964580AInactive Publication Date: 2020-04-07SHANXI LUAN COAL BASED SYNTHETIC OIL +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANXI LUAN COAL BASED SYNTHETIC OIL
Publication Date
2020-04-07
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

Belonging to the field of coal chemical industry, the invention relates to a preparation method of high-concentration gasified coal water slurry. The method includes: mixing coal with ethanol, then carrying out reaction in a supercritical stirring reaction kettle, carrying out ion exchange on the separated solid in a Ca(OH)2 turbid liquid stirring kettle, and then adding an additive of CaO and sodium methylnaphthalene sulfonate to obtain a finished product coal water slurry; wherein the total amount of the additive is determined according to the mass of ash in the coal, the ash fusion point iscontrolled at 1300-1400DEG C, and the ash viscosity is smaller than or equal to 250Pa.s. The method is suitable for producing the gasified coal water slurry with a coal material with high coalification degree, poor gasification activity and high ash fusion point. The method provided by the invention can improve the gasification activity of the coal material and lower the ash fusion point, not only can expand the gasification utilization way of the coal material, improve the resource utilization efficiency, but also has good environmental benefits and social benefits at the same time.
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Description

technical field

[0001] The invention belongs to the field of coal chemical industry, in particular to a method for preparing high-concentration gasified coal-water slurry. Background technique

[0002] Coals in different regions or environments have different coalification degrees, gasification activities, and ash melting points. Raw coals with high coalification degrees, poor gasification activities, and high ash melting points can only be used in fixed-bed gasifiers with low efficiency. Today's coal gasification technology is developing towards large-scale, and the entrained bed gasifier has become the mainstream of gasification technology development due to its high gasification efficiency, environmental protection and cleanliness.

[0003] For coal slurry for gasification, the concentration of coal slurry, reactivity and ash melting point are the three main indicators that restrict the selection of coal for pulping. The concentration of coal slurry determines the gasifi...

Claims

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