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Atomization jetting nozzle for desulfurization of flue-gas

A ceramic nozzle, flue gas technology, applied in the directions of injection devices, injection devices, chemical instruments and methods, can solve the problems of easy cracks, fractures, low tensile strength, etc., to achieve high tensile strength, long service life, Good effect of rapid cooling and rapid heating

Inactive Publication Date: 2007-07-25
宜兴市中环耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(2) 95 porcelain has the brittle characteristics of ceramics, and its tensile strength is low. It is easy to crack and break during the working process of high temperature, high pressure and high speed rotation. This is not allowed by the desulfurization device.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1, flue gas desulfurization atomizing ceramic nozzle

[0018] α-Al with an average particle size of 1.8-3 μm 2 o 3 t-ZrO with 75 parts of fine powder and average particle size of 60-100nm 2 5 parts of composite powder, 13 parts of combined clay, 7 parts of talc, plus 6.3 parts of methyl cellulose in aqueous solution are mixed and ball milled for more than 24 hours, stale for more than 24 hours, gel injection molding, and sintered at 1580 ° C for 2 hours.

[0019] The surface of the sintered product is coated with a dense α-Al 2 o 3 Colloidal coating. After the product is ultrasonically cleaned, it is repeatedly coated on the ceramic nozzle with a falling liquid coating machine. After each layer is coated, it is heat-treated in a drying oven at 150-160°C for 8-13min, and at 460-470°C for 15-20min. When the film reaches the thickness Heat treatment in high temperature electric furnace after request. Among them dense α-Al 2 o 3 The manufacturing method o...

Embodiment 2

[0021] Example 2, referring to Example 1, the composition ratio of the atomized ceramic nozzle for flue gas desulfurization is: α-Al with an average particle size of 1.8-3 μm 2 o 3 70 parts of fine powder, t-ZrO with an average particle size of 60-100nm 2 15 parts of composite powder, 8 parts of combined clay, 3 parts of industrial calcium carbonate, TiO 2 4 parts, plus 5 parts of methyl cellulose aqueous solution mixed ball mill for more than 24 hours, stale for more than 24 hours, gel injection molding, sintering at 1500 ° C for 3 hours.

[0022] The coating process is the same as in Example 1.

Embodiment 3

[0023] Example 3, referring to Example 1, the composition ratio of the atomized ceramic nozzle for flue gas desulfurization is: α-Al with an average particle size of 1.8-3 μm 2 o 3 70 parts of fine powder, t-ZrO with an average particle size of 60-100nm 2 6 parts of composite powder, 8 parts of combined clay, Cr 2 o 3 10 parts, 6 parts of talc, plus 4 parts of methyl cellulose aqueous solution mixed ball mill for more than 24 hours, stale for more than 24 hours, gel injection molding, sintering at 1600 ° C for 2 hours.

[0024] The coating process is the same as in Example 1.

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Abstract

An atomizing ceramic nozzle for desulfurizing the fume generated by the coal-burning boiler in steam power plant is proportionally prepared from alpha-Al2O3 superfine powder, t-ZrO2 nanoparticles, clay, mineralizing agent, and the aqueous solution of methylcellulose through sintering and plating alpha-Al2O3 ceramic film. It has high resistance to high temp, strong corrosion and sudden temp variation, and high strength.

Description

technical field [0001] The invention relates to a flue gas desulfurization atomizing ceramic nozzle used for a coal-fired generator set in a thermal power plant, and also provides a manufacturing method for the flue gas desulfurization atomizing ceramic nozzle. Background technique [0002] Flue gas desulfurization is currently used to control SO in thermal power plants 2 Emission is effective and the most widely used technology, and the atomizing nozzle is a key component in the wet desulfurization device. Chinese patent 02112991.6 discloses a "conical spiral nozzle for desulfurization and dust removal, its manufacturing method and mold". The nozzle is made of ceramic materials. It is precisely formed by grouting once, and the selected ceramic materials can be alumina porcelain, corundum, zirconia, silicon carbide, etc. The content of alumina is 75-99%, and 5-25% of zirconia is added. It is conventional 95 porcelain, and its disadvantages are (1) poor wear resistance. Bec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B05B1/00C04B35/106C04B35/119
Inventor 邱永斌浦雪琴许小静朱军
Owner 宜兴市中环耐火材料有限公司
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