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Innoxious and resource optimization treatment method of black liquid coal paste ignition ash slag

A technology of burning ash and harmless, which is applied in chemical instruments and methods, clay preparation equipment, mixing operation control equipment, etc., and can solve the problems of difficult and rapid extraction of alkali, uncomfortable breathing, low efficiency, etc.

Inactive Publication Date: 2005-01-05
匡少平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(4) Other hazards: In addition, the discharge and stockpiling of ash seriously affects the surrounding environmental sanitation and causes visual pollution; the dust of ash can pollute the air in some areas (mainly dust pollution); the deliquescence of ash can It can partially change the composition of the air (such as the moisture content in the air), causing discomfort to human skin and breathing
In the ash generated by the combustion of black liquor coal slurry, except for a small amount of sodium in the form of Glauber's salt, which can be leached, the alkali in other mineral phases is difficult to quickly extract.
In this way, if the ash is processed by the alkali recovery process, the cost is high and the efficiency is low, and the gain outweighs the gain

Method used

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Experimental program
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Effect test

specific Embodiment approach 1

[0044] The ash produced by the burning of 15% black liquid coal slurry is evenly mixed with clay raw materials, and molded, extruded, and roasted to form ash-clay bricks. After testing, it has high strength, strong corrosion resistance, heat preservation, and insulation. Good thermal performance, in line with relevant national standards for building materials. Alkali in bricks has been tested and cannot be leached by water.

specific Embodiment approach 2

[0045] The ash produced by the burning of 12% black liquid coal slurry is evenly mixed with clay raw materials, and molded, extruded, and roasted to form ash-clay bricks. After testing, it has high strength, strong corrosion resistance, heat preservation, and insulation. Good thermal performance, in line with relevant national standards for building materials. Alkali in bricks has been tested and cannot be leached by water.

specific Embodiment approach 3

[0046] The ash produced by the combustion of black liquid coal slurry with a weight percentage of 9% is evenly mixed with clay raw materials, and molded, extruded, and roasted to form ash-clay bricks. After testing, it has high strength, strong corrosion resistance, heat preservation, and insulation. Good thermal performance, in line with relevant national standards for building materials. Alkali in bricks has been tested and cannot be leached by water.

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Abstract

A method for reclaiming the ash dregs generated by burning the black liquid and coal sludge includes such steps as proportionally mixing said ash dregs with clay or coal gangue, die pressing, and calcining to become building material.

Description

technical field [0001] The invention relates to a method for harmless and resourceful treatment of industrial solid waste, in particular to a method for harmless and resourceful treatment of black liquor coal slurry combustion ash. Background technique [0002] With the vigorous development of the papermaking industry, the environmental pollution caused by the black liquor produced in the papermaking process is becoming more and more serious. At present, thick black liquor and coal are used at home and abroad to prepare clean coal slurry fuel, which is used for steam boilers in paper mills, which can completely digest black liquor in paper mills, reduce energy consumption in paper mills, recover heat from black liquor, control black liquor pollution and The purpose of reducing sulfur dioxide emissions. The research on the use of black liquor coal slurry for power generation has been reported at home and abroad. However, during the combustion process of the black liquid coa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28C7/04
Inventor 匡少平
Owner 匡少平