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Preparation of composite reclaiming agent and uses thereof

A desulfurizer and waste liquid technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve the problems of difficult to widely use farmland and high cost, and achieve the effect of saving limestone resources, fast speed and reducing pollution.

Inactive Publication Date: 2008-08-27
廖宗文 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of limestone powder or quicklime for desulfurization has to consume limestone resources, and the cost is high. In addition, the desulfurized product after desulfurization only contains two nutrients, which is not easy to be widely used in farmland

Method used

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Examples

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preparation example Construction

[0012] The invention relates to a preparation method of a composite desulfurizing agent, which comprises mixing various alkaline waste liquids and residues to obtain a desulfurizing agent, or mixing various alkaline waste liquids and wastes with limestone (calcium carbonate) or slaked lime (calcium hydroxide ) mixed to obtain a desulfurizer.

[0013] The various alkaline waste liquids and residues mentioned above include: 1) Alkaline papermaking waste liquids and waste residues, such as alkali lignin, sodium lignosulfonate, calcium lignosulfonate, or powders made from such waste liquids after drying ; 2) Straw ash, such as furnace powder of straw power plants, boiler ash fueled by biomass; 3) Alkaline waste residue, such as boron mud, blast furnace iron slag; sodium, magnesium, calcium); soda slag from soda plant.

[0014] The ratio of various alkaline waste liquids and residues, or the ratio with limestone and slaked lime, should be adjusted according to the actual alkali co...

Embodiment 1

[0019] Add 1 ton of alkali lignin or sodium lignosulfonate into 3 tons of water and stir to dissolve, then add 0.5 ton of boron mud powder (or alkali slag), and stir into a slurry for later use.

Embodiment 2

[0021] Add 1 ton of straw ash to 3 tons of water and stir to dissolve, then add 0.5 ton of boron mud powder (or alkali slag) and 0.2 ton of limestone powder, and stir to form a slurry for later use.

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PUM

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Abstract

The invention discloses a method for preparing composite desulfurizer and the application thereof. According to the method, various kinds of alkali waste liquid and waste solid are mixed and processed, or various kinds of alkali waste liquid and waste solid are mixed with limestone / slaked lime to get the desulfurizer. Based on substituting the composite desulfurizer from waste solid and waste liquid for limestone flour and quicklime fully or partially, the invention makes use of alkaline waste resources to reduce pollution, save limestone resource and reduce the cost of desulphurization; in addition, the composite desulfurizer reacts more quickly than limestone or quicklime does in desulphurization reaction with high efficiency as the composite desulfurizer is treated with alkaline liquor and is provided with alkali which is highly soluble in water. The desulphurization product is fertilizer with microelements such as calcium, magnesium, zinc, iron, boron, silicon, sulfur and so on, and can be widely applied on farms. The invention makes use of alkaline waste for preparing the composite desulfurizer with the byproduct of trace fertilizer, and becomes an important technical way in energy industry developmental cycle economy.

Description

technical field [0001] The invention relates to a preparation method and application of an alkaline composite desulfurizer. Background technique [0002] Coal desulfurization is an important environmental protection measure to prevent acid rain. Existing coal-fired power plants and boilers mainly use limestone-gypsum wet flue gas desulfurization and flue gas circulating fluidized bed dry desulfurization, wherein the desulfurizer is limestone powder or quicklime. However, the use of limestone powder or quicklime for desulfurization has to consume limestone resources, and the cost is high. In addition, the desulfurized product after desulfurization only contains two nutrients, which is not easy to be widely used in farmland. Contents of the invention [0003] In order to solve the above problems, the object of the present invention is to provide a preparation method of a composite desulfurizing agent, which has the advantages of simple process, reduced pollution, saving nat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/50B01D53/80
Inventor 廖宗文薛春玉
Owner 廖宗文
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