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System and method for determining concentration of carbon dioxide in industrial smoke

A technology of industrial flue gas and carbon dioxide, which is applied in the direction of measuring devices, preparation of test samples, material analysis through optical means, etc., can solve the problems of poor applicability, low accuracy and low processing capacity of online large batches, and achieve reliable The basis of the method, the effect of meeting the traceability requirements of the quantity value, and improving the repeatability and measurement accuracy

Inactive Publication Date: 2017-07-28
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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  • System and method for determining concentration of carbon dioxide in industrial smoke
  • System and method for determining concentration of carbon dioxide in industrial smoke
  • System and method for determining concentration of carbon dioxide in industrial smoke

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A carbon dioxide concentration detection system in industrial flue gas, such as figure 1 As shown, the system includes a standard gas storage tank 1, a gas mixing heating pool 3 connected to the standard gas storage tank 1 through a ventilation line, and an IGS gas infrared analyzer 5 connected to the gas mixing heating pool 3 through a ventilation 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 Through the sampling gun 8, the dust filter 9 connected with the sampling gun 8 through the vent line, the condenser 10 connected with the dust filter 9 through the vent line, the sampling pump 11 connected with the condenser 10 through the vent line, The gas mixing heating pool 3 connected with the samplin...

Embodiment 2

[0051] One of the methods for detecting carbon dioxide concentration in industrial flue gas by the carbon dioxide concentration detection system in industrial flue gas described in embodiment 1 may further comprise the 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 ventilation pipeline connecting the gas mixing heating pool and the IGE gas infrared analyzer to 155 through the electric heating belt. ±5°C constant temperature, and set the measurement temperature of the IGS gas infrared analyzer to 155±5°C; set the flow rate 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) To establish a standard fitting working curve, the steps are as follows:

[0054] ①. Standard gas CO in the car...

Embodiment 3

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

[0068] The same as Example 2 will not be repeated, and the difference is: the flue gas produced by the gas industry (Zhengzhou gas-fired power plant) is collected, and after the treatment, it is passed into the gas mixing heating pool, 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, and the detection is repeated three times. Under this condition, the average value of the characteristic absorption peak area of ​​carbon dioxide in industrial flue gas is 0.15341PA*S;

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

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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. In particular, it relates to a detection system and a detection method for 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 my country's primary energy composition and is widely used in various burners, industrial and commercial boilers. During the application of combustion, a large amount of flue gas will be emitted, and the carbon dioxide emission in the flue gas is 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's reached 6 billion tons. Therefore, the detection of carbon dioxide gas content in flue gas is an important aspect of environmental monito...

Claims

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Application Information

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Patent Type & Authority Applications(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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