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Method for preparing desulfurizer for thermal power plant by using waste marble powder

A technology for abandoned marble and thermal power plants, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve problems such as stone powder discharge pollution, reduce production costs, protect limestone mine resources, and achieve huge ecological and economic benefits. Effect

Active Publication Date: 2014-01-01
FUJIAN BUILDING MATERIAL IMPORT & EXPORT
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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing a desulfurization agent in a thermal power plant by using Nan'an waste marble powder. The desulfurization efficiency of the desulfurizer is greater than 95%, and the production cost is reduced by more than 30%, which effectively solves the problem of stone powder emission pollution and ensures the reliability of the stone industry. Sustainable development, with huge ecological and economic benefits

Method used

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  • Method for preparing desulfurizer for thermal power plant by using waste marble powder

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Experimental program
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Effect test

Embodiment 1

[0023] Raw material collection method:

[0024] (1) Each stone factory is required to classify the stone powder slurry produced by different stone materials for sedimentation, pressure filtration, and classified storage.

[0025] (2) Collect the marble slurry blocks that have been classified and stored by the enterprise, collect them in the shed, homogenize them with a forklift, and dry them in the sun. Through sampling and analysis, ensure that the chemical composition of calcium and magnesium carbonate reaches more than 90%.

[0026] pulping process

[0027] (1) Push the marble powder with a moisture content of 15~30% directly into the mud pool by a forklift for low-speed coarse dispersion, and at the same time add a dispersant according to the proportion of the slurry, remove suspended impurities by suspension method, and remove them by settling chamber Coarse crumbs. The average residence time of the pulp block is not less than 30 minutes.

[0028] (2) The coarsely dis...

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Abstract

The invention discloses a method for preparing a desulfurizer for a thermal power plant by using waste Nan'an marble powder. The method comprises the following steps: collecting the waste Nan'an marble powder in a classification manner; homogenizing the waste Nan'an marble powder; adding the homogenized waste Nan'an marble powder, a dispersing agent and water into a clay machine and performing pre-dispersion; disintegrating and dispersing powder particles in a shear agitation tank by a high-concentration strong-dispersion method; using a high-frequency vibrating screen to filter so as to filter coarse particles in sawdust, adjusting the concentration of a marble powder slurry grout in a slurry storage tank after filtration; conveying the marble powder slurry grout to a desulfurizing absorption tower through a pipeline and performing flue gas desulfurization. The desulfurization efficiency of the desulfurizer provided by the invention is more than 95 percent; the production cost is reduced by above 30 percent; the problem of discharge pollution of stone powder is effectively solved; sustainable development of stone industries is guaranteed; great ecological benefit and economic benefit are achieved.

Description

technical field [0001] The invention belongs to the field of resource recycling comprehensive utilization and coal-fired power plant flue gas wet desulfurization, and specifically relates to a method for preparing a thermal power plant desulfurizer by using Nan'an waste marble powder. Background technique [0002] Marble powder is the cutting powder produced by marble processing plants when cutting and sawing marble stone. Shuitou Town, Nan'an, our province can produce more than 2 million tons of waste marble powder every year. If it is not handled properly, it will seriously pollute the environment and affect the sustainable development of the stone industry. . According to the experimental analysis of the fineness and composition of Nan'an marble powder: the chemical composition of marble powder is basically the same as that of limestone, but there are differences in crystal structure. Limestone belongs to microcrystalline or amorphous structure. Little activity. However...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/50B01D53/80
Inventor 沈南生张坚林松伟张贞宁
Owner FUJIAN BUILDING MATERIAL IMPORT & EXPORT
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