Coal blending method suitable for coal for pressurizing gasification of Texaco water coal slurry

Abstract

The invention relates to a coal blending method suitable for coal for the pressurizing gasification of Texaco water coal slurry, which comprises the following step of blending coal by using coal with the high-ash fusion temperature of more than 1,500 DEG C and coal which is difficult to form slurry and has the low-ash fusion temperature of less than 1,300 DEG C as raw materials, wherein the blending proportion of the coal with the high-ash fusion temperature is between 10 and 60 percent, and the blending proportion of the coal which is difficult to form the slurry and has the low-ash fusion temperature is between 40 and 90 percent, and the raw materials are blended uniformly to form the coal for the gasification of Texaco water coal slurry. The method has an obvious practical significance for the effective utilization of the coal with the high-ash fusion temperature and the coal which is difficult to form the slurry and the stable, high-efficiency and economic operation of the gasification of the water coal slurry, and has the important social benefits for the diversification of the pressurizing gasification raw materials of the water coal slurry and the reasonable utilization of coal resources. The method is suitable for meeting the requirements on coal consumption of both a water coal slurry pressurizing gasification liquid slag-tap furnace and a pulverized coal pressurizing gasification liquid slag-tap furnace.

Description

technical field [0001] The invention relates to a coal blending method, in particular to a coal blending method suitable for coal used for pressurized gasification of Texaco coal water slurry. Background technique [0002] As the second-generation coal gasification technology, Texaco coal-water slurry pressurized gasification technology has the advantages of simple gasifier structure, low energy consumption, easy control and safety of coal-water slurry feed, large single furnace production capacity, environmental friendliness, and effective gas ( CO+H 2 ) content, wide adaptability of coal, high utilization rate of raw materials and convenient transportation of raw materials. The coal-water slurry pressurized gasifier operated by liquid slag removal generally requires FT<1380°C for the melting temperature of raw coal ash. Huaibei is rich in coal resources and of good quality, but most of the coal is coal with high ash melting temperature, such as Huaibei Baishan and oth...

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Problems solved by technology

[0005] Aiming at the problems that coal with high ash melting temperature cannot be used in liquid coal-water slurry pressurized gasifier for liquid slagging, coal with low ash melting temperature is difficult to slurry, and the use of additives will increase the cost of the enterprise, the purpose of the present invention is to provide a A coal blending method suitable for coal used in Texaco coal-water slurry pressurized gasification, the chemical composition of coal ash is adjusted within an appropriate range, which can reduce the melting temperature of coal ash and improve the viscosity-temperature characteristics of ash slag without increasing or Only a small increase in the total amount of ash and slag increases the carbon content in the raw coal, which improves the overall efficiency of the gasifier

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