A carbon dioxide concentration detection system and detection method in industrial flue gas

A technology for industrial flue gas and carbon dioxide, which is used in measurement devices, preparation of test samples, material analysis by optical means, etc. Quantitative traceability requirements, improving repeatability and measurement accuracy, and the effect of reliable method basis

Inactive Publication Date: 2018-05-08
HENAN PROVINCE INST OF METROLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Carbon dioxide concentration measurement methods mainly include chemical method, electrochemical method, gas chromatography, volumetric titration, etc. These methods have defects such as high cost, low processing capacity, poor online large-scale applicability, and low accuracy.

Method used

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  • A carbon dioxide concentration detection system and detection method in industrial flue gas
  • A carbon dioxide concentration detection system and detection method in industrial flue gas
  • A carbon dioxide concentration detection system and detection method in industrial flue gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A detection system for the concentration of carbon dioxide in industrial flue gas, such as figure 1 As shown, the system includes a standard gas storage tank 1, a gas mixing heating tank 3 connected to the standard gas storage tank 1 through a vent line, and an IGS gas infrared analyzer 5 connected to the gas mixing heating tank 3 through a vent line The IGS gas infrared analyzer 5 is electrically connected to the signal input end of the data acquisition device 6; the carbon dioxide concentration detection system in the industrial flue gas also includes an industrial flue gas generation system 7, which is connected to the industrial flue gas generation system 7. The sampling gun 8 communicated with the sampling gun 8 through the vent line, the dust filter 9 communicated with the sampling gun 8 through the vent line, the condenser 10 communicated with the dust filter 9 through the vent line, the sampling pump 11 communicated with the condenser 10 through the vent line, Th...

Embodiment 2

[0051] One of the methods for detecting the concentration of carbon dioxide in industrial flue gas by using the system for detecting the concentration of carbon dioxide in industrial flue gas described in Example 1, includes the following steps:

[0052] (1) Turn on the controller, set the temperature value on the controller, and heat the gas mixing heating pool in the carbon dioxide concentration detection system and the vent line connecting the gas mixing heating pool and the IGE gas infrared analyzer to 155 through the electric heating belt Constant temperature ±5℃, and set the measuring temperature of the IGS gas infrared analyzer to 155±5℃; set the flow value of each standard gas on the controller, and the controller controls the gas outlet of the standard gas storage tank according to the set value The gas mass flowmeter can control the gas flow;

[0053] (2) Establish a standard fitting working curve, the steps are as follows:

[0054] ①. Standard gas CO in the carbon dioxide...

Embodiment 3

[0067] The second method for detecting the concentration of carbon dioxide in industrial flue gas by using the system for detecting the concentration of carbon dioxide in industrial flue gas described in Example 1, includes the following steps:

[0068] The same points as in Example 2 will not be repeated. The difference is that the flue gas produced by the gas industry (Zhengzhou Gas Power Plant) is collected, and then passed into the gas mixing heating pool after processing, and the industrial smoke in the gas mixing heating pool The gas is passed into the IGS gas infrared analyzer at a flow rate of 2000ml / min for detection and analysis. The detection is repeated three times. The average value of the characteristic absorption peak area of ​​carbon dioxide in the industrial flue gas obtained under this condition is 0.15341PA*S;

[0069] Then, the obtained result was substituted into the standard fitting working curve equation described in step (2) of Example 2, and the volume conce...

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Abstract

The invention discloses a system and a method for determining concentration of carbon dioxide in industrial smoke. The method comprises the following steps: preparing a series of simulated industrial smoke with known carbon dioxide standard gas concentration by virtue of a standard gas storage tank, a gas mass flow meter and a controller of the detection system; respectively determining absorption peak areas of carbon dioxide standard gases of different volume concentrations by virtue of an IGS gas infrared analysis instrument in the system, and establishing a standard fitting working curve according to data; and collecting and measuring to-be-determined industrial smoke, substituting a measurement result into the standard fitting working curve, so as to obtain the content of carbon dioxide gas in the industrial gas. According to the method provided by the invention, the original atlas data of the area of a quantitative absorption peak of carbon dioxide can be recorded, related data can be preserved for a long time, the method can meet the value traceability requirement of carbon emission data, the result is accurate, and the precision is high.

Description

Technical field [0001] The invention belongs to the technical field of gas concentration analysis and detection. Specifically, it relates to a detection system and a detection method of carbon dioxide concentration in industrial flue gas. Background technique [0002] my country is the largest developing country in the world and one of the largest coal producers and consumers in the world. Coal occupies a major position in the primary energy composition of our country. It has a wide range of applications in various burners, industrial and commercial boilers. A large amount of flue gas will be emitted during the combustion process, and the carbon dioxide emissions in the flue gas are The main cause of the greenhouse effect poses a serious threat to the ecological environment. In 2008, global carbon dioxide emissions reached 29.2 billion tons, and China reached 6 billion tons. Therefore, the detection of carbon dioxide gas content in flue gas is an important aspect of environmen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/3504G01N1/34G01N1/38G01N1/44
CPCG01N1/34G01N1/38G01N1/44G01N21/3504
Inventor 朱永宏闫继伟路兴杰赵芳谷田平张柯段云刘秀刚冯鑫张朋陈飞
Owner HENAN PROVINCE INST OF METROLOGY
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