Granule(powder) coal based fuel and preparation method thereof

A coal-based fuel and raw material technology, applied in fuel, solid fuel, petroleum industry, etc., can solve problems such as insufficient dispersant dosage, uncontrolled particle size distribution accumulation efficiency, uneven dispersion, etc., and achieve good economic and environmental benefits, The effect of extending product service radius and simple production process

Inactive Publication Date: 2008-08-27
SHANXI LUAN ENVIRONMENTAL ENERGY DEV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing problems are: (1) when the wet grinding pulp is prepared, the sulfur-fixing agent is added together for grinding. Since the sulfur-fixing agent is a calcium-based sulfur-fixing agent, this type of sulfur-fixing agent has a great influence on the rheology of the coal-water slurry Large, can significantly increase the viscosity of coal water slurry, which is not conducive to flow
(2) There is no dispersant in the ground dry coal powder, because it is difficult to mix the wet-prepared coal-water slurry with dry coal powder evenly, so the dispersion of the dispersant in the solid-state coal-water slurry is uneven, resulting in partial solid When the coal water slurry is restored to slurry, there is insufficient amount of dispersant, which makes slurry difficult and affects the use of users
(3) The particle size distribution and corresponding stacking efficiency of the coal particl

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Mix 50kg of raw coal (wherein the amount of dry coal is 49kg) and 15.97kg of water, and wet finely grind together with 0.25kg sodium lignosulfonate dispersant to make high-concentration coal-water slurry, the concentration of coal-water slurry is 74%, water The content of coal particles smaller than 74 μm in the coal slurry is 96.65%; 25.68 kg of raw coal (the amount of dry coal is 25.17 kg) and 0.13 kg of sodium lignosulfonate dispersant are dry coarsely ground into dry coal powder, and the ground dry coal The coal particle content of less than 74 μm in the powder is 33.62%; the above-mentioned coal-water slurry is mixed with the above-mentioned dry coal powder at a ratio of 100:39, and the accumulation efficiency of coal particles is 68%, forming a granular (powder) coal-based fuel, which is sealed and stored in bags , wherein the maximum particle size is 300μm, the coal particle content less than 74μm is 75.26%, and the coal content is 81%.

[0027] The 92.03kg granu...

Embodiment 2

[0029] Mix 50kg of native coal slime (39kg of dry coal) with 1.04kg of water, then wet finely grind with 0.27kg of sodium humate dispersant to make high-concentration coal-water slurry, the concentration of which is 76%. The content of coal particles less than 74 μm in the coal water slurry is 98.32%; 21.04kg of raw coal (wherein the amount of dry coal is 20.62kg) and 0.10kg of sodium lignosulfonate dispersant are dry coarsely ground into dry coal powder, and the ground dry The coal particle content of less than 74 μm in the coal powder is 32.76%; the above-mentioned coal-water slurry is mixed with the above-mentioned dry coal powder at a ratio of 100:41, and the accumulation efficiency of coal particles is 68%, forming a granular (powder) coal-based fuel, which is bagged and sealed For preservation, the maximum particle size is 300 μm, the coal particle content less than 74 μm is 75.86%, and the coal content is 82.28%.

[0030] The 72.46kg granular (powder) coal-based fuel desc...

Embodiment 3

[0032] 50kg of high-sulfur coal (sulfur content 3.28%, of which dry coal is 48.5kg), 12.60kg of water and 0.39kg of sodium lignosulfonate dispersant were wet-milled into a preliminary slurry with a slurry concentration of 77%. The coal particle content at 74 μm is 99.42%. 30.64kg of high-sulfur coal (3.28% sulfur, 29.72kg of dry coal), 0.24kg of sodium lignosulfonate dispersant and 1.46kg of calcium carbonate (CaCO 3 ) dry coarsely ground into dry coal powder, the content of coal particles smaller than 74 μm is 36.73%. Mix the above-mentioned coal-water slurry with the above-mentioned dry coal powder at a ratio of 100:49, and the accumulation efficiency of coal particles is 68.18%, forming granular (powder) coal-based fuel, which is sealed and stored in bags. The particle content is 75.60%, and the coal content is 84%.

[0033] The 93.86kg granular (powder) coal-based fuel described in this example can be restored to a sulfur-fixing type coal-water slurry with a concentratio...

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Abstract

The invention discloses a grain(powder)-shaped coal-based fuel and the process for preparation, the coal-based fuel is prepared through adopting a wet fine grinding-dry rough grinding technique, namely the process for preparation comprises the following steps: mixing raw material coal and liquid whose mass ratio is (7-8):(2-3), and preparing into slurries with slurries through wet fine grinding, wherein the dosage of dispersing agent is 0.3-3% of the amount of dry coal in raw material coal, and the concentration of slurries is 70%-80%, coal particle content which is less than 74um in slurries is bigger than 90%, utilizing dry rough grinding to grind raw material coal and dispersing agent into dry coal powder, wherein dispersing agent is 0.3-3% of dry coal amount in raw material coal, coal particle content which is less than 74um in dry coal power is less than 50%, stirring the above slurries and the above dry coal powder according to 100:(30-80), controlling coal particles stacking efficiency in 60%-80%, shaping grain(powder)-shaped coal-based fuel, wherein maximum particle grain size is 300um, the content of coal particles which are less than 74um are bigger than 75%, and the content of coal is bigger 80%.

Description

technical field [0001] The invention relates to the harmless treatment of clean coal-based fuel and high-concentration organic waste liquid, in particular to granular (powder) coal-based fuel. High-concentration organic waste liquid refers to industrial waste water containing more than 1% organic harmful substances, or waste water whose COD exceeds 2000 mg / L. Background technique [0002] Coal-based fuels mainly include raw coal and coal-water slurry. Raw coal has large particle size, low combustion efficiency and serious pollution. As a clean fluid coal-based fuel, coal-water slurry has high combustion efficiency and low pollutant emissions, and can replace oil and coal for combustion. At present, it has been widely used in industrial kilns, boilers, ceramics and fertilizer industries. Coal-water slurry is a fluid coal-based fuel, which requires special storage and transportation equipment during transportation, and the storage and transportation costs are high. Since th...

Claims

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Application Information

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IPC IPC(8): C10L5/04
Inventor 黄波朱书全刘红缨郭金刚刘仁生王东飞张文平赵兵房连增
Owner SHANXI LUAN ENVIRONMENTAL ENERGY DEV
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