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Comprehensive utilization method of coal water slurry gasified waste residue on Texaco gasifier

A technology of coal water slurry and waste residue, which is applied in the direction of cement production, solid waste management, climate sustainability, etc., can solve the problems that rarely involve the utilization of waste residue, and achieve the effect of large consumption, low modification cost and energy saving

Inactive Publication Date: 2009-06-17
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At home and abroad, detailed research and extensive application of coal-water slurry gasification technology have been carried out, and great technological progress has been achieved. However, the utilization of waste residue after coal-water slurry gasification is rarely involved

Method used

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  • Comprehensive utilization method of coal water slurry gasified waste residue on Texaco gasifier

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add 10% lime by weight of high-calcium coal to Shenfu high-calcium coal for gasification, prepare coal-water slurry, gasify in Texaco gasifier, and obtain gasification waste residue, which is separated by gravity on a shaking table. After separation, the waste residue contains The amount of water is 35.58% (WT); the obtained silicate vitreous slag block after waste slag separation accounts for 75% (WT) of the total waste slag; black coke powder accounts for 25% (WT); the alkalinity coefficient of the silicate vitreous slag is 1.15, passed The vertical mill or ball mill with drying function will grind and dry the silicate glassy waste residue, and after grinding and drying, the specific surface area will be 370m 2 Silicate vitreous waste slag powder per kg, according to the national standard (GB / T18046-2000) "Granulated blast furnace slag powder used in cement and concrete" test, each age (3 days, 7 days, 28 days) , 90 days) activity coefficient A3=69%, A7=74.1%, A28=98%...

Embodiment 2

[0026] Process is the same as the waste slag of embodiment 1, obtains specific surface area 500m after grinding and drying 2 / kg, according to the national standard (GB / T18046-2000) "Granulated Blast Furnace Slag Powder Used in Cement and Concrete" test, the activity coefficients of each age are A3=72%, A7=83%, A28=112%, A90 = 128%.

Embodiment 3

[0028] Process is the same as the waste slag of embodiment 1, obtains specific surface area 700m after grinding and drying 2 / kg, according to the national standard (GB / T18046-2000) "Granulated Blast Furnace Slag Powder Used in Cement and Concrete" test, the activity coefficient of each age is A3=98%, A7=110%, A28=123%, A90 = 141%.

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Abstract

The invention provides a comprehensive utilization method for gasified waste residue of Texaco furnace water coal slurry, which is characterized in that enough fluxing agent is added during preparation and gasification of the water coal slurry; without changing a Texaco gasification process, the alkali coefficient of the generated waste residue is larger than 1.0, and then high carbon-containing granules and silicate glass slag blocks are separated by a gravity separation method; the waste residue is dried during grinding of the silicate glass slag blocks by using the heat value of the high carbon-containing granules; and finally obtaining the high-activity slag powder used for the cement or concrete industry, wherein the specific surface area of the slag powder is larger than 350m<2> / kg, and the moisture content is less than 1 weight percent, so the aim of effectively utilizing the gasified waste residue of the Texaco furnace water coal slurry is achieved. The method has the advantages of simple process, high utilization rate of the waste residue, and good economic benefit.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of solid waste in coal chemical industry, and in particular relates to a method for comprehensive utilization of coal-water slurry gasification waste residue of a Texaco furnace. Background technique [0002] As we all know, the most commonly used method is the Texaco coal-water slurry method to prepare syngas when coal is gasified using internationally advanced technology. [0003] The coal water slurry gasification technology has been studied in detail and widely applied at home and abroad, and great technological progress has been made. However, the utilization of waste residue after gasification of coal water slurry is seldom involved. [0004] In order to save energy and reduce emissions, reduce the impact of waste residues after coal-water slurry gasification on environmental pollution, and develop circular economy, the invention relates to the comprehensive utilization of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/04C04B7/24
CPCY02P40/10Y02W30/91
Inventor 赵鹏邵伟陈剑宁
Owner CHANGAN UNIV
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