An additive and its application for improving the viscosity-temperature characteristics of fly-coal gasification coal ash slag

A technology of additives and coal ash, which is applied in the direction of granular/powder fuel gasification, gasification process, petroleum industry, etc. It can solve the problem of coal ash slag viscosity being sensitive to temperature changes, and achieve the effect of improving viscosity-temperature characteristics.

Active Publication Date: 2018-06-29
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that Shanxi anthracite has a high viscosity of coal ash slag and the viscosity of coal ash slag is too sensitive to change with temperature, so it cannot be used for gasification in a liquid slagging gasifier, and to provide an improved Shanxi anthracite coal Auxiliary agent for viscosity-temperature characteristics of coal ash slag and its application

Method used

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  • An additive and its application for improving the viscosity-temperature characteristics of fly-coal gasification coal ash slag

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Experimental program
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Effect test

Embodiment 1

[0015] Will contain 93.62% CaSiO by mass percentage 3 , 1.0% Fe 2 o 3 , 2.5% Al 2 o 3 , 2.3% MgO additive, with particle size less than or equal to 80 mesh (≦180μm), 5.67% (based on coal) is added to Shanxi anthracite A coal, and mixed evenly. According to the method stipulated in the national standard "Measurement of Coal Ash Viscosity" (GB / T 31424-2015), the viscosity-temperature characteristics of coal ash slag of raw coal and coal samples with additives were measured, and it was found that the additive significantly improved coal ash melting. The viscosity-temperature characteristics of slag make the viscosity 25Pa. The temperature of s decreases from 1615°C to 1460°C, and the viscosity of coal ash slag changes slowly with temperature.

Embodiment 2

[0017] Will contain 95.00% CaSiO by mass percentage 3 , 0.8% Fe 2 o 3 , 1.6% Al 2 o 3 , 2.0% MgO additive, with particle size less than or equal to 80 mesh (≦180μm), 7% (based on coal) is added to Shanxi anthracite B coal, and mixed evenly. According to the national standard "Method for Determination of Coal Ash Viscosity" (GB / T 31424-2015), the viscosity-temperature characteristics of coal ash slag of raw coal and coal samples with additives were measured, and it was found that the additive significantly improved the viscosity of coal ash slag. temperature characteristics, making the viscosity 25Pa. s temperature decreased from 1635°C to 1450°C, and.

[0018] From figure 1 It can be seen that the uniform mixing of additives into Shanxi anthracite B significantly improved the viscosity-temperature characteristics of its coal ash slag, and not only reduced the viscosity of coal ash slag at high temperature, the viscosity was 25Pa. The temperature of s is reduced from abo...

Embodiment 3

[0020] Will contain 99.00% CaSiO by mass percentage 3 , 0.15% Fe 2 o 3 , 0.2% Al 2 o 3 , 0.3% MgO additive, with particle size less than or equal to 80 mesh (≦180μm), 8.91% (based on coal) is added to Shanxi anthracite C coal, and mixed evenly. According to the national standard "Method for Determination of Coal Ash Viscosity" (GB / T 31424-2015), the viscosity-temperature characteristics of coal ash slag of raw coal and coal samples with additives were measured, and it was found that the additive significantly improved the viscosity of coal ash slag. temperature characteristics, making the viscosity 25Pa. The temperature of s decreases from 1643°C to 1440°C, and the viscosity of coal ash slag changes slowly with temperature.

[0021] Shanxi Anthracite A of the present invention, B, the ash chemical composition of C is shown in Table 1

[0022] Table 1 Ash chemical composition of Shanxi anthracite coal samples

[0023] .

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Abstract

The invention relates to an aid for improving the viscosity-temperature characteristic of gasified coal ash slag of powdered coal. The aid is wollastonite powder containing the 93.62%-99.00% of CaSiO3. The aid has the advantage of being capable of improving the viscosity-temperature characteristic of the coal ash slag of Shanxi anthracite.

Description

technical field [0001] The invention belongs to the technical field of liquid slag removal, and in particular relates to an additive for improving the viscosity-temperature characteristics of coal gasification coal ash slag and its application. Background technique [0002] Coal gasification technology is an important leading technology for clean and efficient conversion of coal, and it is also the only way to develop modern coal chemical industry. High-temperature, high-pressure entrained bed gasification has the characteristics of easy large-scale scale, wide range of coal types and high carbon conversion rate, and has become the main application technology of coal gasification in recent years. At present, the more advanced entrained entrained gasification devices mainly include Shell (Shell) pulverized coal gasification and Texaco (Texaco) coal-water slurry pressurized gasification devices, both of which adopt liquid slag discharge technology. Therefore, whether the coal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/52
CPCC10J3/52C10J2300/1625
Inventor 白进孔令学李怀柱李文白宗庆尉迟唯郭振兴
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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