A system and method for detecting oxygen content and nitrogen oxide concentration in coke oven flue gas

Abstract

The invention relates to a coke oven flue gas oxygen content and nitrogen oxide concentration detection system and method. The detection system comprises a kiln eye sampling tube, a small flue sampling tube, a suction pump, a flue gas analysis device and a data storage system. The kiln eye sampling tube and the small flue sampling tube are communicated through a sampling pipeline. The sampling pipeline is connected to the suction pump and a chimney. The suction pump is connected to the flue gas analysis device and the data storage system. The kiln eye sampling tube, the small flue sampling tube, and the sampling pipeline before the chimney are all provided with an electric valve, and the electric valves are controlled by an electric valve control system. The provided system can directionally and precisely measure the contents of oxygen and nitrogen oxides in each combustion chamber of a coke oven; can judge whether the ratio of gas to air is proper or not and the combustion is complete or not, can feedback the fire tuning situation and sealing of the coke oven in time, is capable of comprehensively regulating the coke oven, and reduces the operation cost of the coke oven.

Description

technical field [0001] The invention relates to the technical field of coke oven flue gas detection, in particular to a detection system and method for oxygen content and nitrogen oxide concentration of coke oven flue gas. Background technique [0002] In the "Twelfth Five-Year Plan" of my country, the "Coking Chemical Industry Pollutant Emission Standard" requires that the emission of nitrogen oxides in coke oven exhaust gas in the coking process of iron and steel enterprises should be less than 500mg / m from January 1, 2015 3 , for the first time, the nitrogen oxides emitted from coke oven chimneys were listed as the control indicators for the emission of air pollutants in coking enterprises in my country. The content of nitrogen oxides in the coke oven flue gas is one of the important detection parameters of the coke oven process. The detection and analysis of the nitrogen oxide content in the coke oven flue gas. It has important guiding significance. By detecting the con...

AI Technical Summary

Problems solved by technology

This patent can detect horizontally and vertically the oxidation amount of each combustion chamber, and each combustion chamber of the coke oven has a clear measurement, but whether the ratio of gas and air in a single combustion chamber is appropriate, the combustion of the combustion chamber Whether it is complete, the fire adjustment situation, and the tightness of the coke oven cannot be reflected in time

[0005] To sum up, the existing published flue gas detection methods cannot accurately detect each combustion chamber of the coke oven, whether the ratio of gas and air in a single combustion chamber is appropriate, whether the combustion chamber is completely burned, The situation of fire adjustment and the tightness of the coke oven cannot be fed back in time

Images