Device and method for detecting contents of particulate matters and heavy metal elements in tail gas

A technology for element content and detection device, applied in measurement devices, sampling devices, particle suspension analysis, etc., can solve the problems of complex operation, cumbersome operation, expensive instruments and equipment, etc., to ensure absorption efficiency, avoid condensation, and improve detection accuracy. Effect

Pending Publication Date: 2020-07-17
STATE GRID HEBEI ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the sampling and detection of heavy metal elements in the tail gas of coal-fired power plants mainly adopts the US EPA-29 standard method. However, this method still has defects such as relatively complicated operations, cumbersome operations, and expensive instruments and equipment.

Method used

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  • Device and method for detecting contents of particulate matters and heavy metal elements in tail gas
  • Device and method for detecting contents of particulate matters and heavy metal elements in tail gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The method for detecting the content of particulate matter and heavy metal elements in the exhaust gas of the above-mentioned device comprises the following steps:

[0049] S1: Connect the sampling device to ensure that 200 mL of nitric acid solution with a mass concentration of 4% is installed in the nitric acid solution absorption bottle 211, and that 200 mL of a hydrogen peroxide solution with a mass concentration of 8% and permanganate are contained in the hydrogen peroxide solution absorption bottle 212. Potassium solution absorption bottle 231 is equipped with 200mL mass concentration of 3% potassium permanganate solution, sulfuric acid solution absorption bottle 232 is equipped with 200mL mass concentration of 8% sulfuric acid solution, check the air tightness of the device, sampling filter membrane 120 pre- After heating to 125°C, insert the sampling gun 100 vertically into the flue, set the sampling method to constant velocity sampling, and set the total samplin...

Embodiment 2

[0054] The method for detecting the content of particulate matter and heavy metal elements in the exhaust gas of the above-mentioned device comprises the following steps:

[0055] S1: Connect the sampling device to ensure that 200mL of nitric acid solution with a mass concentration of 6% is installed in the nitric acid solution absorption bottle 211, and that 200mL of a hydrogen peroxide solution with a mass concentration of 12% and permanganate are contained in the hydrogen peroxide solution absorption bottle 212. Potassium solution absorbing bottle 231 is equipped with 200mL mass concentration of 5% potassium permanganate solution, sulfuric acid solution absorbing bottle 232 is equipped with 200mL mass concentration of 12% sulfuric acid solution, check the air tightness of the device, sampling filter membrane 120 pre- After heating to 130°C, insert the sampling gun 100 vertically into the flue, set the sampling method to constant velocity sampling, and set the total sampling ...

Embodiment 3

[0060] The method for detecting the content of particulate matter and heavy metal elements in the exhaust gas of the above-mentioned device comprises the following steps:

[0061] S1: Connect the sampling device to ensure that 200mL of nitric acid solution with a mass concentration of 5% is installed in the nitric acid solution absorption bottle 211, and 200mL of a 10% hydrogen peroxide solution with a mass concentration of 10% in the hydrogen peroxide solution absorption bottle 212, permanganate The potassium permanganate solution that the mass concentration of 200mL is housed in the potassium solution absorption bottle 231 is 4%, and the sulfuric acid solution that the mass concentration of 200mL is housed in the sulfuric acid solution absorption bottle 232 is 10%. After heating to 120°C, insert the sampling gun 100 vertically into the flue, set the sampling method to constant velocity sampling, and set the total sampling volume to 1.5m 3 , when the cumulative sampling volum...

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Abstract

The invention relates to the technical field of heavy metal element analysis, and particularly discloses a device and a method for detecting contents of particulate matters and heavy metal elements ina tail gas. The device comprises a sampling gun, an absorption box and a constant-speed sampler which are sequentially connected. The sampling gun comprises a sampling probe, a sampling filter membrane and a sampling pipe; and a first group of absorption bottles, a safety bottle, a second group of absorption bottles and a drying bottle which are sequentially connected are arranged in the absorption box, the first group of absorption bottles are connected with the sampling pipe, and an outlet of the drying bottle is connected with the constant-speed sampler. According to the device and the method provided by the invention, the two groups of absorption bottles are combined with inductively coupled plasma mass spectrometry and cold atomic absorption spectrophotometry so that the contents ofheavy metal elements in the tail gas is effectively detected, and the device and the method are simple, efficient and high in accuracy.

Description

technical field [0001] The invention relates to the technical field of analysis of heavy metal elements, in particular to a device and method for detecting the content of particulate matter and heavy metal elements in tail gas. Background technique [0002] Coal is the most abundant fossil fuel resource in the world. After coal combustion, a large amount of soot, SO 2 , NO x In addition to conventional pollutants such as Be, Cr, Mn, Co, Ni, As, Se, Cd, Sb, Pb, Hg and other heavy metal elements. The above-mentioned heavy metal elements will not only cause harm to the atmosphere, soil, water and other environments, but also accumulate in organisms and cause serious damage to the body. Pollutants from coal combustion mainly come from industrial coal-fired boilers, coal-fired power plants, non-ferrous smelting and iron and steel smelting, among which coal-fired power plants are the largest source of pollution. Therefore, it is of great significance to realize the accurate sam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/22G01N21/31G01N27/62G01N5/02G01N15/06
CPCG01N1/2202G01N1/2205G01N1/2258G01N21/3103G01N27/62G01N5/02G01N15/0618G01N2001/2261G01N2001/225G01N2001/2288G01N2021/3107
Inventor 车凯郁金星侯海萍韩忠阁陈秋陈崇明牛向楠宫云茜焦阳
Owner STATE GRID HEBEI ELECTRIC POWER RES INST
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