Desulfurization particle for reducing CFB circulating fluidized bed discharge

A circulating fluidized bed and particle technology, applied in the separation of dispersed particles, chemical instruments and methods, gas treatment, etc., can solve the problems of emission obstruction, desulfurization efficiency is not difficult to meet environmental needs, etc., to reduce emissions and improve desulfurization Efficiency and quality, and the effect of increasing the contact area

Inactive Publication Date: 2019-03-22
JIANGSU RUIJIE ENVIRONMENTAL ENG SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the desulfurization efficiency of the existing circulating fluidized bed is not difficult to meet all environmental requirements, and the slightly larger emission has become an obstacle to its further promotion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The invention provides a desulfurization granule for reducing the discharge of a CFB circulating fluidized bed. Its components and the mass percentages of each component are: hot-melt granules: 45%, calcium carbonate powder: 45% and additives: 10%; the composition of hot-melt particles and the mass percentage of each component are: nylon: 70%, alkyl silicate: 15% and metal powder: 15%, nylon is PA12 nylon; metal powder is titanium alloy Ti64 powder; the composition of additives and the mass percentage of each composition are: particle binder: 15%, emulsifier: 10%, initiator: 4% and solvent: 71%; the composition of particle binder And the mass percentages of each component are: vinyl acetate-ethylene copolymer emulsion: 13%, polyvinyl alcohol: 7%, preservative: 2%, defoamer: 2%, and the rest is water; the emulsifier is Span; The initiator is ammonium persulfate; the solvent is butyl acetate.

[0020] The production method is: use hot-melt granules as the base, mix calci...

Embodiment 2

[0022] The invention provides a desulfurization granule for reducing the discharge of a CFB circulating fluidized bed, the components and the mass percentages of each component are: hot-melt granules: 62%, calcium carbonate powder: 30% and additives: 8%; the composition of hot-melt particles and the mass percentage of each component are: nylon: 85%, alkyl silicate: 5% and metal powder: 10%, nylon is PA12 nylon; metal powder is titanium alloy Ti64 powder; the composition of additives and the mass percentage of each composition are: particle binder: 20%, emulsifier: 10%, initiator: 10% and solvent: 60%; the composition of particle binder And the mass percentages of each component are: vinyl acetate-ethylene copolymer emulsion: 27%, polyvinyl alcohol: 17%, preservative: 4%, defoamer: 4%, and the rest is water; emulsifier is toast; The initiator is potassium persulfate; the solvent is butanone.

[0023] The production method is: use hot-melt granules as the base, mix calcium carb...

Embodiment 3

[0025] The invention provides a desulfurization granule for reducing the discharge of a CFB circulating fluidized bed. The composition and mass percentage of each component are: hot-melt granule: 54%, calcium carbonate powder: 38% and additives: 8%; the composition of hot-melt particles and the mass percentage of each component are: nylon: 77%, alkyl silicate: 12% and metal powder: 11%, nylon is PA12 nylon; metal powder is titanium alloy Ti64 powder; the composition of additives and the mass percentage of each composition are: particle binder: 18%, emulsifier: 7%, initiator: 7% and solvent: 68%; the composition of particle binder And the mass percentages of each component are: vinyl acetate-ethylene copolymer emulsion: 20%, polyvinyl alcohol: 13%, preservative: 3%, defoamer: 3%, and the rest is water; emulsifier is alkylphenol Polyoxyethylene ether; initiator is sodium persulfate; solvent is propylene glycol methyl ether acetate.

[0026] The production method is: use hot-mel...

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PUM

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Abstract

The invention provides a desulfurization particle for reducing CFB circulating fluidized bed discharge. The desulfurization particle is prepared from the following ingredients in mass percent: 45 to 62% of hot-melt particle, 30 to 45% of calcium carbonate powder and 6 to 12% of additive. A preparation method comprises the following steps: taking the hot-melt particle as a substrate, mixing the calcium carbonate powder and the additive and preparing into a ball shape through 3D printing to obtain the desulfurization particle. Furthermore, drainage channels are further evenly distributed in thedesulfurization particle. According to the desulfurization particle disclosed by the invention, a 3D printing method is utilized to achieve the purpose of arranging drainage channels in the smaller spherical desulfurization particle; the contact area between the desulfurization particle and sulfur-containing flue gas is improved; and meanwhile, the desulfurization efficiency and quality are improved by an ingenious material; when the desulfurization particle is applied to a CFB circulating fluidized bed, the discharge amount can be obviously reduced; and the possibility of further promoting the CFB circulating fluidized bed is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of energy saving and emission reduction, and in particular relates to a desulfurization particle used for reducing the emission of a CFB circulating fluidized bed. Background technique [0002] Circulating fluidized bed (CFB) adopts fluidized combustion, and its main structure includes two parts: combustion chamber and circulating furnace. Basic problems such as science and engineering problems such as expansion, wear, and overtemperature have become advanced technologies for energy utilization of non-combustible solid fuels. However, the desulfurization efficiency of the existing circulating fluidized bed is not difficult to meet all environmental requirements, and the slightly larger emission has become an obstacle to its further promotion. [0003] Therefore, it is an urgent problem for those skilled in the art to develop a technology that can further save energy and reduce emissions for the existing cir...

Claims

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Application Information

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IPC IPC(8): B01D53/83B01D53/48
CPCB01D53/48B01D53/83B01D2251/404B01D2251/606B01D2258/0283
Inventor 吴国忠周伟安余志超张玉
Owner JIANGSU RUIJIE ENVIRONMENTAL ENG SCI & TECH
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