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High-temperature flue gas thermal electron emission type particulate matter charge device

A technology of high-temperature flue gas and charging device, applied in the direction of particle charging/ionization, electrostatic separation, etc., can solve the problems of affecting the charging effect of dust, uneven distribution of electron density in the charging area, and easy poisoning of emitters, etc., to achieve The effect of overcoming electrical insulation problems, improving high temperature resistance, and improving uniformity

Inactive Publication Date: 2008-12-17
CHANGSHU NANJING NORMAL UNIV DEV RES INST
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the emitter is easily poisoned and fails in high-temperature flue gas, and its working temperature is ≤800°C; the second is that the electron density distribution in the charging area is uneven, which affects the charging effect of the dust

Method used

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  • High-temperature flue gas thermal electron emission type particulate matter charge device

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Embodiment 1

[0010] Embodiment 1: As shown in FIG. 1 , a high-temperature flue gas thermionic emission charging device for particulate matter is composed of an emitting electrode rod 1 and a conductive cylinder 2 . In order to give full play to the characteristics of thermal electron emission, the device of the present invention adopts a tubular structure. The emitter electrode rod is made of rare earth tungsten composite functional material as the thermal electron emission cathode; the outer wall of the conductive cylinder is grounded as the thermal electron emission anode; the middle part of the conductive cylinder is provided with an insulating sleeve 3, and a stainless steel conductive suspender 4 is used to pass through the insulating sleeve The tube suspends the emitter electrode rod in the center of the conductive cylinder to ensure that the thermal electrons are evenly emitted to the surroundings. When installed and used, the two emitters are connected with the cathode of the power...

Embodiment 2

[0012] Embodiment 2: Basically the same as Embodiment 1, the difference is: the rare earth tungsten composite functional material contains rare earth oxide CeO in its components 2 and La 2 o 3 , the mass percentage of the rare earth oxide is 1%, and the balance is tungsten; the ratio between the two rare earth oxides can be arbitrary.

Embodiment 3

[0013] Embodiment 3: Basically the same as Embodiment 2, the difference is: the rare earth tungsten composite functional material contains rare earth oxide CeO in its components 2 , La 2 o 3 and Y 2 o 3 , the mass percentage of the rare earth oxide is 2.2%, and the balance is tungsten; the ratio of the rare earth oxides can be arbitrary.

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Abstract

The invention discloses a particulate charged device with high temperature flue gas thermal electron-emission type, which consists of an emission electrode bar (1) and a conductive cylinder body (2); the composite functional material of rare-earth tungsten is adopted by the emission electrode bar as a thermal electron-emission cathode; the conductive cylinder body is grounded as a thermal electron-emission anode; an insulated sleeve (3) is arranged at the middle part of the conductive cylinder body; a conductive suspended bar (4) penetrates the insulated sleeve and the emission electrode bar is suspended into the conductive cylinder body. By adopting the composite functional material of rare-earth tungsten to produce thermal electronic-emission electrode, the performance of high-temperature resistance of the device of the invention is improved, thus causing the working temperature of device to be capable of reaching 1,200 DEG C; since the charged area adopts a ring structure, the characteristics of thermal electron-emission can be embodied fully, thus improving the uniformity of the density of the electron distribution; since the thermal electron emission technology is adopted, the current density in the charged area is 3 to 4 orders of magnitude higher than that of traditional charged technology with corona discharging type.

Description

technical field [0001] The invention relates to a high-temperature flue gas dedusting device, in particular to a high-temperature flue gas thermionic emission type particle charging device, which is used in the flue gas dust removal technology. Background technique [0002] The capture of fine particles in the atmosphere and the dedusting of high-temperature flue gas are two difficult problems faced by the field of environmental engineering at home and abroad so far, and they are also research hotspots in the direction of air pollution control. Electrostatic dust removal technology has the advantages of low pressure drop force loss, no clogging, large amount of flue gas treatment, and high dust removal efficiency, especially for fine particles. The charging of particles is the first and crucial step in electrostatic dust removal. Traditional electrostatic precipitators use corona particle charging technology based on high-voltage corona discharge, which is suitable for work...

Claims

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Application Information

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IPC IPC(8): B03C3/34B03C3/38
Inventor 顾中铸顾洲许津津傅晓慧
Owner CHANGSHU NANJING NORMAL UNIV DEV RES INST
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