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On-line sampling device and method for sulfur trioxide

A sulfur trioxide and sampling device technology, which is applied in sampling devices, measuring devices, sampling, etc., can solve the problems of large measurement errors and low accuracy of measurement results in off-line measurement methods, and achieve the effect of reducing droplets

Pending Publication Date: 2019-11-08
HUANENG POWER INT INC +1
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Problems solved by technology

[0004] Currently, the existing SO 3 Most of the sampling methods are off-line measurement methods, but the off-line measurement method has large artificial measurement errors and the accuracy of the measurement results is not high

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  • On-line sampling device and method for sulfur trioxide
  • On-line sampling device and method for sulfur trioxide

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Embodiment Construction

[0026] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.

[0027] An on-line sampling device and method for sulfur trioxide in the present invention, based on the international standard EPA-8, can realize on-line sampling of coal-fired flue gas. 3 / H 2 SO 4 / SO 3 The aerosol is transferred to the isopropanol collection liquid to complete the SO 3 Online sampling. The concentration range of sulfur trioxide in the flue gas that can be accurately collected by the device of the present invention is 0.2-200mg / m 3 ; Sampling time is 5-30min.

[0028] Concretely, a kind of sulfur trioxide online sampling device of the present invention, such as figure 1 As shown, it includes a heat gun 2, a low-temperature absorption system, an isopropanol solution feeding system, an isopropanol sampling liquid extraction system, and an air extraction system. The low-...

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Abstract

The invention provides an on-line sampling device and method for sulfur trioxide to reduce the human operation error of sampling personnel and improve the sampling accuracy. The device comprises a low-temperature absorber, an isopropanol sampling liquid extraction system and an air extraction system; the air extraction system comprises a gas-liquid separator, a gas mass flow meter and an air pump,wherein the gas mass flow meter and the air pump are successively connected to a gas outlet of the gas-liquid separator; the low-temperature absorber comprises an isopropanol absorption liquid bottle, a flue gas input pipe and a flue gas output pipe; the isopropanol absorption liquid bottle is filled with isopropanol absorption liquid and placed in an environment of -2 to 2 DEG C; the input end of the flue gas input pipe is connected with a heating gun, and the output end is inserted into the absorption liquid; the output end of the flue gas output pipe is higher than a set absorption liquidlevel, and the output end is connected with a gas inlet of the gas-liquid separator; the isopropanol sampling liquid extraction system includes an isopropanol sampling liquid output pipe, a suction peristaltic pump and a sampling collector which are successively connected to the bottom of the isopropanol absorption liquid bottle.

Description

technical field [0001] The invention relates to the technical field of environmental protection of electric power and industrial boilers, in particular to an online sampling device and method for sulfur trioxide. Background technique [0002] Flue gas from coal-fired power plants and industrial boilers often contains SO 3 , SO 3 Not only is it the direct cause of pipeline corrosion and air preheater blockage, but also SO 3 It is an important precursor for the formation of PM2.5, which is easy to cause atmospheric smog. Since 2015, relevant environmental protection departments in various parts of the country have successively reduced the SO 3 The emission concentration limit is set at 5mg / m 3 . At present, the colored plume emitted by coal-fired power plants is seriously trailing. Many environmental protection experts pointed out that the colored plume is closely related to SO 3 Aerosol related. [0003] Since 2017, more and more provinces have introduced local policie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/22
CPCG01N1/2258G01N1/2202G01N1/2205G01N2001/2223G01N2001/2261G01N2001/2217
Inventor 付康丽赵瀚辰姚明宇郭中旭杨嵩程广文杨成龙蔡铭李阳
Owner HUANENG POWER INT INC
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