System for preparing combustible slurry from ultra-pure coal

Abstract

The invention discloses a system for preparing a combustible slurry by using ultra-pure coal. The system comprises a pulverization device for wet-grinding an ultra-pure coal raw material into particles of which the particle size is smaller than a preset particle size and mixing the particles with water to form ultra-pure coal suspension, an extrusion filtration device connected to the outlet of the pulverization device and used for extruding to filter the ultra-pure coal suspension, and a blending device connected to the outlet of the extrusion filtration device; and the blending device is used for mixing an ultra-pure coal filter cake obtained by extruding the ultra-pure coal suspension with an additive and water to form the combustible slurry. The pulverization device of the system for preparing the combustible slurry from the ultra-pure coal adopts a wet grinding method, so the drying process is omitted, environmental and health problems such as acid substance volatilization duringdrying and dust appearing during dry grinding are avoided, operation is simplified, the length of the technological process is shortened, continuous operation of the system is achieved, then the problem of raw material loss caused by intermittent operation is avoided, the yield is increased, and water is saved.

Description

technical field [0001] The invention relates to the field of energy, in particular to a system for preparing combustible slurry by using ultra-pure coal. Background technique [0002] Ultra-pure coal technology is one of the clean coal utilization technologies widely studied by domestic and foreign scholars. Ultra-pure coal refers to ultra-low ash coal with an ash content of <1% after deep deashing of coal by physical or chemical methods. Combustible slurry made from ultra-pure coal pulverization can replace diesel and natural gas for power generation or transportation industry and has broad application prospects. [0003] At present, the technology of preparing combustible slurry from ultra-pure coal pulverization is mainly realized in the laboratory. The steps of preparing combustible slurry in the laboratory include drying, grinding, mixing, filtering and blending. The ultra-pure coal raw material is coal with a certain moisture content, which needs to be dried first...

AI Technical Summary

Problems solved by technology

[0004] Under laboratory conditions, the technical process of preparing combustible slurry by ultra-pure coal pulverization is complicated, resulting in a large loss of raw materials and large water consumption; because ultra-pure coal contains acidic substances, the temperature rise during the drying process will easily cause the acidic substances to volatilize, which is not conducive to operation The personnel are healthy and will cause pollution to the environment; and the subsequent grinding operation adopts dry grinding, and the dust problem caused by dry grinding will also adversely affect the health of the operators and the environment

Images