Device for performing flue gas mercury concentration measurement by utilizing modified fly ash

A mercury concentration and temperature control device technology, applied in the direction of measuring devices, sampling devices, test sample preparation, etc., can solve the problems of unfavorable promotion, inability to detect mercury concentration, and long measurement time, so as to reduce costs and improve adsorption efficiency Effect

Inactive Publication Date: 2017-12-12
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Activated carbon has a good adsorption effect on mercury, but the cost is high, which is not conducive to popularization
[0006] Whether it is wet measurement or dry measurement, it is necessary

Method used

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  • Device for performing flue gas mercury concentration measurement by utilizing modified fly ash
  • Device for performing flue gas mercury concentration measurement by utilizing modified fly ash
  • Device for performing flue gas mercury concentration measurement by utilizing modified fly ash

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Embodiment Construction

[0020] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0021] The invention provides a device for measuring flue gas mercury concentration using modified fly ash, which uses a cheap and efficient modified fly ash adsorbent as a substitute for activated carbon to measure flue gas mercury concentration, and uses an atmosphere control device to control the flue gas mercury concentration. The adsorption atmosphere improves the adsorption efficiency of cheap adsorbents, and ensures the accuracy of flue gas mercury concentration measurement while reducing costs.

[0022] Such as physical connection diagram figure 1 and flow diagram figure 2 As shown, the flue gas sampled from the flue first flows through the dust removal device 1 to remove the fly ash in the flue gas; Adsorbent capture; then flow through the tail gas treatment device to remove harmful gases and moisture in the tail gas; finally reach t...

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Abstract

The invention relates to a device for performing flue gas mercury concentration measurement by utilizing modified fly ash. The device comprises a dust removal device, an adsorption tube, a temperature control device, a tail gas treatment device, a flow control device and an atmosphere control device. During measurement, flue gas sequentially flows through dust removal device, the adsorption tube and the tail gas treatment device. In the adsorption tube, gas-phase mercury in the flue gas is absorbed by a special modified fly ash adsorbent. The atmosphere of an adsorption environment is controlled by the atmosphere control device in the process that the flue gas passes through the adsorption tube. The temperature control is performed by the temperature control device in the process that the flue gas passes through the dust removal device and the adsorption tube. The content of the mercury in the adsorbent is analyzed by utilizing a neutron activation analysis method or the content of the mercury in a filtrate is analyzed by utilizing a cold atomic absorption spectrometry or a cold atomic fluorescence spectrometry after the adsorbent is leached with acid liquor. The device provided by the invention has the benefit that the adsorption atmosphere is controlled by adopting the atmosphere control device, so that the adsorption efficiency of the cheap adsorbent is improved, and while the cost is reduced, the flue gas mercury concentration measurement accuracy is ensured.

Description

technical field [0001] The invention relates to the field of flue gas mercury measurement in power plants, in particular to a device for measuring flue gas mercury concentration by using modified fly ash. Background technique [0002] Mercury is a highly toxic heavy metal pollutant that is stable at room temperature. Both mercury and its compounds are highly biotoxic and bioaccumulative, posing serious threats to human health and global ecosystems. At present, mercury emissions from coal-fired power plants are the main source of man-made mercury pollution, and mercury in coal-fired flue gas is mainly in the form of elemental mercury (Hg 0 ), oxidized mercury (Hg 2+ ) and particulate mercury (Hg p ). In order to control atmospheric mercury pollution, it is of great significance to monitor the mercury concentration in the flue gas of coal-fired power plants. [0003] Scholars at home and abroad have done a lot of work on the measurement of mercury concentration in flue ga...

Claims

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Application Information

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IPC IPC(8): G01N1/22G01N1/34
CPCG01N1/2205G01N1/2211G01N1/2258G01N1/34G01N2001/2261G01N2001/227
Inventor 殷琦
Owner SOUTHEAST UNIV
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