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

A technology for coal-water slurry and synthesis gas, which is applied in the petroleum industry, liquid carbon-containing fuels, fuels, etc., can solve the problems of low yield of coal-water slurry synthesis gas, uneven particle size distribution, and low slurry concentration, and achieves the realization of The effect of resource utilization, uniform particle size distribution and high slurry concentration

Active Publication Date: 2021-05-28
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 problems of uneven particle size distribution, high viscosity, low slurry concentration and poor fluidity in the existing coal water slurry, which lead to In order to solve the problems of low utilization rate and low synthesis gas yield, a coal water slurry and its preparation method and a synthesis gas preparation method are provided. The coal water slurry has uniform particle size distribution, high slurry concentration, and low apparent viscosity. Good fluidity, when the coal water slurry is used to prepare synthesis gas, it can effectively improve the utilization rate of coal water slurry and the yield of synthesis gas

Method used

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

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preparation example Construction

[0012] As mentioned above, the first aspect of the present invention provides a method for preparing coal-water slurry, the method comprising: adjusting the pH value of the MTP process wastewater to greater than 8, then mixing with chemical additives and water to obtain a slurry; The slurry is mixed and ground with coal and waste MTP catalyst to obtain coal water slurry. The mixing in the present invention can be carried out under stirring conditions.

[0013] In some embodiments of the present invention, preferably, the pH value of the MTP process wastewater is adjusted to 8-9, which is more conducive to the preparation of better-performing coal-water slurry.

[0014] In the present invention, the source of the MTP process wastewater is not particularly limited, and wastewater with organic matter produced by reaction processes such as fixed bed, fluidized bed, and moving bed can be used.

[0015] In some embodiments of the present invention, the MTP process wastewater is not...

Embodiment approach

[0037] According to a preferred embodiment of the present invention, the apparent viscosity of the coal-water slurry is 1000-1400mPa·s, the concentration of the coal-water slurry is 57-65wt%, and the average particle size of the coal-water slurry is 70 -85 μm.

[0038] The third aspect of the present invention provides a synthesis gas preparation method, the method comprising: mixing the aforementioned coal-water slurry of the present invention with oxygen for gasification reaction to obtain synthesis gas.

[0039] In some embodiments of the present invention, preferably, the volume ratio of the coal-water slurry to oxygen is 1:300-450.

[0040] In some embodiments of the present invention, preferably, the conditions of the gasification reaction include: a temperature of 1000-1500° C. and a pressure of 2-5 MPa.

[0041] In the present invention, the device for performing the gasification reaction is not particularly limited, and may be a conventional device in the field, such...

Embodiment 1

[0058] 700g MTP process waste water 1 is heated to 50 ℃, adopts sodium hydroxide solution to adjust the pH value of the heated MTP process waste water 1 to 8.5, then with 300g chemical additives (comprising 50wt% sodium lignosulfonate, 20wt% sulfonic acid Sodium humate and 30wt% sodium polystyrene sulfonate) and 1500g water were mixed and stirred to obtain a slurry; 6000g coal 1 and 1500g waste MTP catalyst 1 were crushed by a crusher to obtain coal with an average particle size of 75 μm 1 and spent MTP catalyst 1 with an average particle size of 50 μm;

[0059] Then, the slurry is mixed with the crushed coal 1 and the spent MTP catalyst 1, and the mixed slurry is ground by a high-speed grinder at a speed of 200 rpm to obtain a coal water slurry.

[0060] The resulting coal water slurry was placed for 24 hours to observe the state: no delamination, no obvious precipitation. The performance parameters of the coal water slurry are listed in Table 1.

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Abstract

The invention relates to the technical field of coal water slurry, and discloses coal water slurry and a preparation method thereof and a preparation method of synthesis gas, and the method comprises the following steps: adjusting the pH value of MTP process wastewater to be greater than 8, and then mixing the MTP process wastewater with a chemical additive and water to obtain slurry; and mixing the slurry with coal and the waste MTP catalyst, and grinding the mixture to obtain the coal water slurry. According to the invention, the coal water slurry prepared by taking the MTP process wastewater, the chemical additive, the water, the coal and the waste MTP catalyst as raw materials has the characteristics of uniform particle size distribution, high slurry concentration, small apparent viscosity and good fluidity; when the coal water slurry is used for preparing the synthesis gas, the utilization rate of the coal water slurry and the yield of the synthesis gas can be effectively improved.

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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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/32
CPCC10L1/32Y02P20/52
Inventor 江永军苏慧庄壮金政伟张安贵李瑞龙蒙延斐颜蜀雋赵娜娜王倩
Owner CHINA ENERGY GRP NINGXIA COAL IND CO LTD
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