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Coal water slurry, preparation method thereof and preparation method of synthesis gas

A coal-water slurry and slurry technology, which is used in the petroleum industry, liquid carbon-containing fuels, fuels, etc., can solve the problems of uneven particle size distribution, low hydrogen yield of synthesis gas, and low slurry concentration.

Active Publication Date: 2021-05-18
CHINA ENERGY GRP NINGXIA COAL IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of uneven particle size distribution, low slurry concentration, high viscosity and poor fluidity in the existing coal water slurry, which leads to the loss of syngas To solve the problem of low yield and hydrogen yield, a coal water slurry and its preparation method and a synthesis gas preparation method are provided. The particle size distribution of the coal water slurry is uniform, the slurry concentration is high, the apparent viscosity is small, and the fluidity is low. Well, when the coal water slurry is used to prepare syngas, it can effectively increase the yield of syngas and hydrogen

Method used

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  • Coal water slurry, preparation method thereof and preparation method of synthesis gas
  • Coal water slurry, preparation method thereof and preparation method of synthesis gas
  • Coal water slurry, preparation method thereof and preparation method of synthesis gas

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preparation example Construction

[0014] As previously mentioned, the first aspect of the present invention provides a kind of preparation method of coal-water slurry, this method comprises:

[0015] (1) Coal, water, additives, slag wax are mixed to obtain a slurry, and then the slurry is ground and sieved to obtain a primary slurry, and the primary slurry is divided into coal-water slurry A, coal-water slurry B and Coal water slurry C;

[0016] (2) The first grinding of the coal-water slurry A is carried out to obtain the slurry A, and the second grinding of the coal-water slurry B is carried out to obtain the slurry B; the slurry A and the slurry B are mixed with the water described in step (1) The coal slurry C is mixed to obtain the final coal water slurry.

[0017] The preparation method of the coal-water slurry of the present invention can be summarized as first mixing coal, water, additives, and slag wax, and then obtaining a primary slurry after grinding and sieving, and then returning a part of the p...

Embodiment approach

[0047] According to a preferred embodiment of the present invention, the apparent viscosity of the coal-water slurry is 760-800mPa·s, the solid content of the coal-water slurry is 65-85wt%, and the average particle size of the coal-water slurry is 20-40 μm, the stacking efficiency of the coal-water slurry is 0.7-0.8; the coal powder with a particle size of less than 75 μm in the coal-water slurry accounts for more than 80v% of the total coal powder. The coal-water slurry satisfying the above-mentioned range of performance parameters has better performance, and is more conducive to increasing the production rate of synthesis gas and hydrogen.

[0048] The third aspect of the present invention provides a method for preparing synthesis gas, the method comprising: mixing the coal-water slurry provided above in the present invention with oxygen for gasification reaction to obtain synthesis gas.

[0049] In some embodiments of the present invention, preferably, the volume ratio of t...

Embodiment 1

[0066] (1) The Meihuajing coal is crushed to obtain coal powder with a particle size of 7 mm;

[0067] (2) the coal powder, water, additive (comprising 40wt% cetyltrimethylammonium bromide, 30wt% sodium dodecylbenzenesulfonate and 30wt% sodium carboxymethylcellulose) , Slag Wax 1 is kneaded according to the mass ratio of 50:19.9:0.1:30 to obtain slurry, then the slurry is ground in a high-speed grinder (rotating speed is 120r / min), and sieved through a 10-mesh sieve , to obtain primary slurry, the primary slurry is divided into coal water slurry A, coal water slurry B and coal water slurry C;

[0068] (3) Carry out the first grinding of the coal-water slurry A in the vertical stirring mill to obtain a slurry A with an average particle diameter of 25 μm, and carry out the second grinding of the coal-water slurry B in the vertical stirring mill to obtain the average particle size Diameter is the slurry B of 10 μm, wherein, based on the total amount of the primary slurry, the co...

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Abstract

The invention relates to the field of coal water slurry, and discloses a coal water slurry, a preparation method thereof and a preparation method of synthesis gas, the method comprises the following steps of: (1) mixing coal, water, an additive and wax residue to obtain a slurry, then grinding and screening the slurry to obtain primary slurry, and dividing the primary slurry into a coal water slurry A, a coal water slurry B and a coal water slurry C; (2) performing primary grinding on the coal water slurry A to obtain a slurry A, and performing secondary grinding on the coal water slurry B to obtain a slurry B; and mixing the slurry A and the slurry B with the coal water slurry C obtained in the step (1) to obtain the final coal water slurry. The coal water slurry provided by the invention has the characteristics of uniform particle size distribution, high slurry concentration, small apparent viscosity, high stacking efficiency, good fluidity and good stability; when the coal water slurry is used for preparing the synthesis gas, the yield of the synthesis gas and hydrogen can be higher.

Description

technical field [0001] The invention relates to the technical field of coal water slurry, in particular to a coal water slurry, a preparation method thereof and a synthesis gas preparation method. Background technique [0002] Coal water slurry is a new, efficient and clean coal-based fuel. It is a new member of the fuel family. It is composed of 65%-70% coal powder with different particle size distribution, about 29-34% water and about 1% chemical Mixture made of additives. It has the same fluidity as oil, and its calorific value is half that of oil, so it is called a liquid coal product. Coal-water slurry can maintain the physical and chemical properties of coal, but also has good fluidity and stability like petroleum, and is easy to store and adjust. It is a low-pollution clean fuel that can be atomized and burned with high combustion efficiency. [0003] At present, the preparation method of coal water slurry is as follows: coal is used as raw material, and coal, water...

Claims

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Application Information

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IPC IPC(8): C10L1/32
CPCC10L1/326
Inventor 江永军苏慧庄壮金政伟张安贵李瑞龙蒙延斐颜蜀雋王倩
Owner CHINA ENERGY GRP NINGXIA COAL IND CO LTD
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