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Composite coal and method for improving viscosity-temperature characteristics of coal ash and its application

A technology of coal ash and characteristics, applied in solid fuel, granular/powder fuel gasification, petroleum industry, etc., can solve the problems of reducing the viscosity of coal ash, a large amount of ash and slag, increasing costs, etc., to improve the viscosity-temperature characteristics, The effect of reducing the generation of solid ash and reducing the viscosity

Active Publication Date: 2022-04-26
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

[0007] The purpose of the present invention is to overcome that the coal type with high viscosity and temperature characteristics in the prior art cannot be applied to the entrained bed gasification technology of liquid slag discharge, and the conventional method of adding co-solvent to coal will not only increase the cost, but also To solve the defect of producing a large amount of ash, provide a composite coal and a method for improving the viscosity-temperature characteristics of coal ash and its application. The composite coal can significantly reduce the viscosity of coal ash, so that raw coal with high viscosity-temperature characteristics can be used for liquid slag discharge Entrained bed gasification technology

Method used

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  • Composite coal and method for improving viscosity-temperature characteristics of coal ash and its application
  • Composite coal and method for improving viscosity-temperature characteristics of coal ash and its application
  • Composite coal and method for improving viscosity-temperature characteristics of coal ash and its application

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Embodiment 1

[0052] This embodiment is used to illustrate the composite coal of the present invention and the method for improving the viscosity-temperature characteristics of coal ash.

[0053] The adjusted coal ZN and the raw coal MD whose viscosity-temperature characteristics are to be improved are uniformly mixed at a weight ratio of 3:1 to obtain composite coal I.

[0054] The coal ash viscosity-temperature characteristic curve of the prepared composite coal is as follows: figure 1 shown.

Embodiment 2

[0056] This embodiment is used to illustrate the composite coal of the present invention and the method for improving the viscosity-temperature characteristics of coal ash.

[0057] The adjusted coal ZL and the raw coal MD whose viscosity-temperature characteristics are to be improved are uniformly mixed at a weight ratio of 3:1 to obtain composite coal II.

[0058] The coal ash viscosity-temperature characteristic curve of the prepared composite coal is as follows: figure 1 shown.

Embodiment 3-4

[0060] The adjusted coal is mixed with the raw coal whose viscosity-temperature characteristics are to be improved to obtain composite coal. The types and weight ratios of the adjusted coal and raw coal are shown in Table 4.

[0061] The coal ash viscosity-temperature characteristic curve of the prepared composite coal is as follows: image 3 shown. The temperature of the composite coal when the viscosity is 25Pa·s, coal ash content and (SiO 2 +Al 2 o 3 +TiO 2 ) / (Fe 2 o 3 +CaO+Na 2 O+K 2 O+MgO), the results are also shown in Table 4.

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Abstract

The invention relates to the technical field of clean coal utilization, and discloses a composite coal and a method for improving the viscosity-temperature characteristics of coal ash and its application. The composite coal includes adjusted coal and raw coal whose viscosity-temperature characteristics need to be improved. Ratio ≥ 1, the adjusted coal is selected from at least one of iron-containing coal, calcium-containing coal and iron-calcium coal; the raw coal satisfies: (SiO 2 +Al 2 o 3 +TiO 2 ) / (Fe 2 o 3 +CaO+Na 2 O+K 2 O+MgO)=4‑9; the composite coal meets the following conditions: the coal ash content is 9‑25wt%, (SiO 2 +Al 2 o 3 +TiO 2 ) / (Fe 2 o 3 +CaO+Na 2 O+K 2 O+MgO)=2-4. Compared with the prior art, the present invention improves the coal ash viscosity-temperature characteristics of the raw coal by means of coal blending, and can significantly reduce the viscosity of the coal ash.

Description

technical field [0001] The invention relates to the technical field of coal clean utilization, in particular to a composite coal, a method for improving the viscosity-temperature characteristics of coal ash, and an application thereof. Background technique [0002] Shell, GE, GSP, Texaco, aerospace furnace, four-nozzle coal-water slurry gasifier and other entrained bed gasifiers, the slag produced by coal gasification during operation is discharged from the slag port in a molten state under the action of gravity and air flow, That is, the gasifier is liquid slag discharge. [0003] However, the entrained bed gasifier usually operates at a temperature of 1200° C. to 1500° C. If the temperature is too high, the service life of the gasifier will be reduced. Within the operating temperature range of the entrained bed gasifier, coal gasification produces slag. When the viscosity of the slag is lower than 25Pa·s, the entrained bed gasifier can discharge the slag smoothly. When th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L9/10C10J3/46
CPCC10L9/10C10J3/46
Inventor 申国鑫金政伟井云环杨磊吴跃马银剑杨会军蔚永清张起胜田进梅杨英
Owner CHINA ENERGY GRP NINGXIA COAL IND CO LTD
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