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Method for detecting sulfur dioxide and nitrogen oxides in high-moisture-content flue gas

A technology of sulfur dioxide and nitrogen oxides, which is applied in the detection of nitrogen oxides and sulfur dioxide in high-moisture flue gas, can solve the problems of complicated procedures, long analysis time, secondary environmental pollution, etc. The effect of long time and saving detection time

Inactive Publication Date: 2018-11-23
郑州市通标环境检测有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The object of the present invention is: in order to solve the problem that the prior art flue gas sulfur dioxide and nitrogen oxide detection method has long analysis time, cumbersome procedures, and the reagent components used are complex and contain toxic components, which will cause secondary pollution to the environment. A detection method for sulfur dioxide and nitrogen oxides in flue gas with high moisture content

Method used

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Effect test

Embodiment 1

[0032] A preferred embodiment of the present invention provides a method for detecting sulfur dioxide and nitrogen oxides in flue gas with high moisture content, comprising the following steps:

[0033] (1) Flue gas sampling: collect and sample the exhaust gas after boiler combustion through the flue gas sampler in series with three sampling pipes, and temporarily store them in the three sampling pipes respectively;

[0034] (2) Determination of the moisture content of flue gas: put the filter cartridge into the first sampling tube, remove the dust particles in the soot, and then pump the air at a constant flow rate, and record the gas temperature at the outlet of the condenser at a fixed time interval, and the flow meter reads As well as the temperature and pressure before the flowmeter, after sampling, collect the moisture in the sampling tube and the rubber tube into the condenser, and measure the condensed water with a measuring cylinder to measure the moisture content of t...

Embodiment 2

[0041] The preferred embodiment of the present invention makes the following optimizations on the basis of the first embodiment: a method for detecting sulfur dioxide and nitrogen oxides in high-moisture flue gas provided by the preferred embodiment of the present invention includes the following steps:

[0042] (1) Flue gas sampling: collect and sample the exhaust gas after boiler combustion through the flue gas sampler in series with three sampling pipes, and temporarily store them in the three sampling pipes respectively;

[0043] (2) Determination of the moisture content of flue gas: put the filter cartridge into the first sampling tube, remove the dust particles in the flue dust, and then pump the air at a constant flow rate, and record the gas temperature at the outlet of the condenser at regular intervals, and the flow meter reads As well as the temperature and pressure before the flowmeter, after sampling, collect the moisture in the sampling tube and the rubber tube in...

Embodiment 3

[0049] The preferred embodiment of the present invention makes the following optimizations on the basis of the first embodiment: a method for detecting sulfur dioxide and nitrogen oxides in high-moisture flue gas provided by the preferred embodiment of the present invention includes the following steps:

[0050] (1) Flue gas sampling: collect and sample the exhaust gas after boiler combustion through the flue gas sampler in series with three sampling pipes, and temporarily store them in the three sampling pipes respectively;

[0051] (2) Determination of the moisture content of flue gas: put the filter cartridge into the first sampling tube, remove the dust particles in the flue dust, and then pump the air at a constant flow rate, and record the gas temperature at the outlet of the condenser at regular intervals, and the flow meter reads As well as the temperature and pressure before the flowmeter, after sampling, collect the moisture in the sampling tube and the rubber tube in...

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Abstract

The invention discloses a method for detecting sulfur dioxide and nitrogen oxides in a high-moisture-content flue gas, and relates to the technical field of air pollutant detection. The method comprises the following steps: (1) sampling of flue gas: connecting an exhaust gas generated after burning of a boiler with three sampling tubes through a flue gas sampler in series, and temporarily storingin the three sampling tubes; (2) determination of moisture content of flue gas; (3) preparation of absorption liquid; (4) determination of nitrogen oxide content; determination of sulfur dioxide content; (6) result accounting. The method has the advantages of improving analysis efficiency and saving detection time.

Description

technical field [0001] The invention belongs to the technical field of air pollutant detection, and in particular relates to a method for detecting sulfur dioxide and nitrogen oxides in flue gas with high moisture content. Background technique [0002] Sulfur dioxide and nitrogen oxides are common pollutants in the atmosphere, which can irritate the human respiratory tract and induce upper respiratory tract infections and chronic poisoning. With the continuous improvement of people's awareness of environmental protection, more and more attention is paid to the monitoring and detection of various types of exhaust emissions. At present, when the boiler exhaust gas is discharged, it is necessary to detect the content of each harmful component in the exhaust gas, and then discharge it after targeted treatment. When the prior art detects waste gas, the most commonly used method is naphthalene ethylenediamine hydrochloride spectrophotometry. Although this detection method can det...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/14G01N33/00
CPCG01N25/142G01N33/0013G01N33/0024G01N33/0062
Inventor 李红亮徐立
Owner 郑州市通标环境检测有限公司
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