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Gas analysis device, mercury removal system, gas analysis method, and mercury removal method in exhaust gas

A gas analysis and exhaust gas technology, applied in separation methods, sampling devices, gas treatment, etc., can solve the problems that the concentration of NH3 cannot be determined, and the analysis of chloride ions cannot be carried out.

Active Publication Date: 2015-09-30
MITSUBISHI POWER LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0018] However, in order to control the Hg contained in the exhaust gas 0 Oxidation is carried out through the desulfurization unit, and the NH 4 When the Cl solution is sprayed into the flue in a liquid state, the conventional SO in the exhaust gas as described in Patent Document 2 3 or NH 3 Analytical method for the determination of the concentration of gases in the presence of NH 4 Chloride ions (Cl - ) analysis cannot be performed on such a problem
That is, in the case where NH is supplied into the flue as in the past, 3 In the smoke treatment device of the device, when in order to control the Hg contained in the exhaust gas 0 Oxidation and additional supply of NH 4 In the case of a Cl solution device, the NH in the exhaust gas is measured as described in the conventional patent document 2. 3 In the case of the concentration of the NH 3 The value of the concentration is dependent on the supplied NH from 3 The NH supplied by the device 3 The concentration, still depends on the NH supplied from 4 The NH supplied by the device of the Cl solution 3 concentration

Method used

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  • Gas analysis device, mercury removal system, gas analysis method, and mercury removal method in exhaust gas
  • Gas analysis device, mercury removal system, gas analysis method, and mercury removal method in exhaust gas
  • Gas analysis device, mercury removal system, gas analysis method, and mercury removal method in exhaust gas

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no. 1 approach

[0041] A gas analysis device according to a first embodiment of the present invention will be described with reference to the drawings. figure 1 is a schematic diagram showing a gas analysis device according to a first embodiment of the present invention, figure 2 It is a figure which schematically shows the structure of a filter cartridge. Such as figure 1 , 2 As shown, the gas analysis device 10 of this embodiment includes: 4 Cl), sulfurous acid (SO 3 ) The flue 12 of the exhaust gas 11 of both sides extracts the exhaust gas extraction pipe 13 of the exhaust gas 11A; is arranged on the exhaust gas extraction pipe 13, and removes the catcher (smoke dust removal mechanism) 14 contained in the extracted exhaust gas 11A; The exhaust gas is extracted from the pipe 13, and the NH contained in the exhaust gas 11A 4 Cl, SO 3 The filter cartridge (precipitation mechanism) 15 that both sides separate out; 4 Cl, SO 3 Both samples 16 are irradiated with X-rays 17 and fluorescen...

no. 2 approach

[0052] A Hg removal system according to a second embodiment of the present invention will be described with reference to the drawings. image 3 It is a schematic diagram showing the Hg removal system of the second embodiment of the present invention. The Hg removal system of this embodiment is used as NH 4 Cl determination device (NH 4 Cl determination mechanism), use figure 1 , 2 The gas analysis device 10 of the first embodiment is shown, so the NH 4 Description of the Cl determination device.

[0053] Such as image 3 As shown, the Hg removal system 30A of this embodiment is a Hg removal system for removing Hg contained in the flue gas 11 discharged from the boiler 31, and has the function of spraying NH into the flue 12 downstream of the boiler 31. 4 NH of Cl solution 41 4 Cl solution supply mechanism 32; 3 The gas reduces the NOx in the exhaust gas 11 and Hg in the presence of HCl gas 0 The reduction and denitration device (reduction and denitration mechanism) 33...

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Abstract

A gas analysis device 10 according to the present invention includes a flue-gas extraction pipe 13 that extracts flue gas 11A from a flue gas duct 12 to which flue gas 11 including both of NH 4 Cl and SO 3 is fed, a collector 14 that is provided in the flue-gas extraction pipe 13 and removes soot dust contained in the extracted flue gas 11A, a roll filter 15 that is provided in the flue-gas extraction pipe 13 and deposits both of NH 4 Cl and SO 3 contained in the flue gas 11A, and a measurement device 19 that measures both of NH 4 Cl and SO 3 contained in the flue gas 11A by irradiating a sample including both of NH 4 Cl and SO 3 deposited by the roll filter 15 with X-rays and detecting fluorescent X-rays generated from the sample.

Description

technical field [0001] The present invention relates to a gas analyzer for measuring the concentration of ammonium chloride supplied to boiler exhaust gas, a mercury removal system, a gas analysis method, and a method for removing mercury in exhaust gas. Background technique [0002] Exhaust gas from combustion equipment such as boilers and waste incinerators contains harmful components such as smoke, sulfur oxides (SOx), and nitrogen oxides (NOx), so it is necessary to use an exhaust gas treatment device to remove them. Conventional flue gas treatment devices include a denitrification device that reduces NOx and a wet desulfurization device that uses alkali absorption liquid as an SOx absorbent. In the flue, ammonia (NH 3 ) and use the denitrification catalyst of the denitrification device to reduce nitrogen monoxide (NO) as shown in the following formula (1) to remove NOx, and use the wet desulfurization device to absorb SOx by the alkali absorption liquid to treat harmful...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N23/223B01D53/64B01D53/86G01N1/22
CPCG01N21/64B01D53/64B01D2257/602G01N1/2202G01N2223/076B01D53/30G01N23/223B01D2251/206
Inventor 香川晴治千代丸胜鹈饲展行冈本卓也村上盛纪
Owner MITSUBISHI POWER LTD