Raw material processing method

Abstract

The invention relates to the technical field of coal gasification, in particular to a raw material treatment method. The raw material treatment method provided by the invention comprises the following steps: mixing pulverized coal, water and an additive to obtain a mixed material; and shaping the mixed material to obtain spherical particles, and forming a gap between the additive on the outermost layer and the pulverized coal. A certain amount of water and additives are added into separated pulverized coal which is ground by a grinding machine to prepare stable slurry, the slurry is conveyed into forming equipment to prepare micron-sized spherical particles, the particles are spherical, the combustible risk of the particles of the pulverized coal is reduced, conveying is convenient, the problem of applicability of the pulverized coal is solved, the amount of dust carried by gasified synthesis gas is reduced, the load of post-treatment dust removal equipment is reduced, and the product cleanliness is improved.

Description

technical field [0001] The present disclosure relates to the technical field of coal gasification, in particular to a raw material processing method. Background technique [0002] Coal hydrogasification technology uses pulverized coal and hydrogen to directly undergo hydrogasification reaction to produce methane, aromatic oil and semi-coke. Generally, more than 90% of the raw coal powder particle size is required to be less than 75 microns, and the overall particle size is required to be controlled at 5-100 microns, which is most beneficial to the hydrogasification reaction. However, coal is ground by a conventional mill, and the maximum particle size can be effectively controlled by controlling the air-to-coal ratio, grinding time, etc., but the minimum particle size cannot be effectively controlled. Ultrafine particles of particle size, such as particles smaller than 5 microns, or even smaller. The existence of these ultrafine particles will lead to an increase in the fl...

AI Technical Summary

Problems solved by technology

However, after coal is ground by a conventional mill, the maximum particle size can be effectively controlled by controlling the air-to-coal ratio, grinding time, etc., but the minimum particle size cannot be effectively controlled. Ultrafine particles of particle size, such as particles smaller than 5 microns or even smaller

The existence of these ultrafine particles will lead to an increase in the flammability risk of pulverized coal when it is accumulated. The semi-coke particles produced are also relatively fine, which leads to serious scattering of semi-coke, which seriously affects the transportation and shipment of semi-coke and the recycling process of semi-coke. and reuse