Prevention and treatment of blast furnace gas leak

Prevention and treatment of blast furnace gas leakage in gas-fired boilers

in recent years, with the increasingly tight supply of coal and the rising price of coal in China, as well as the increasingly strict implementation of environmental protection regulations, more and more enterprises have turned their attention from the traditional coal-fired heat source to the gas-fired heat source. With its significant advantages of environmental protection and energy saving, gas-fired heating has been more and more widely used throughout the country, especially the gas-fired boiler of cogeneration. However, in actual operation, gas pipeline leakage will be caused due to various reasons, which will lead to explosion accidents. Generally, it should be re welded; If the performance of components becomes worse, this explosion accident has great destructive power, which not only causes serious damage to boiler equipment and plant, but also easily causes personal casualties and bad social impact. Therefore, the safety management of gas-fired boilers has become an important issue of concern to the thermal power industry. During the operation of the gas-fired boiler in Shandong Jinling iron mine, the harm and risk of blast furnace gas leakage are continuously analyzed, effective preventive measures are formulated, and many advanced new technologies, new processes and new equipment at home and abroad are adopted, so as to ensure the safe production and smooth operation of the boiler and achieve remarkable social and economic benefits

harm of blast furnace gas leakage

the main components of blast furnace gas in our mine are: hydrogen content of 1.6%, carbon monoxide content of 24.9%, carbon dioxide content of 14.9%, nitrogen content of 58.4%, oxygen content of 0.2% and a small amount of other substances. Due to the large amount of nitrogen and carbon dioxide, the calorific value of blast furnace gas is very low, and the low calorific value under standard state is about 3320kj/nm3. Blast furnace gas explosion limit is generally between 12.5% and 74.2%. In actual use, if you don't understand the nature and characteristics of fuel gas and can't use fuel gas correctly, accidents will occur

gas explosion

gas explosion refers to the combustion process of high temperature (up to 3000 ℃) and high pressure produced by the explosive mixture formed by the mixing of gas and air in an instant (one thousandth of a second) when encountering an open fire. The influence of the surface roughness of wood on its performance is as follows:. Because its explosion wave speed can reach 300m/s, it will produce great destructive force

gaseous fuels with different properties are composed of some single gas mixtures, including combustible substances and non combustible substances. The explosion limit of gas is determined by its composition. Through the above analysis of the composition of blast furnace gas, we can clearly understand that the main combustible component of blast furnace gas is carbon monoxide, with a volume fraction of 24.9% and a small amount of hydrogen. In general, the explosion limit of blast furnace gas in air ranges from 12.5% to 74.2%. The larger the explosion limit range is, the lower the explosion limit is, the greater the explosion hazard is. Because blast furnace gas is colorless and tasteless, leakage is not easy to be detected, and air is everywhere, it is easy to form explosive mixtures. If there is open fire, static electricity, lightning or improper operation when the blast furnace gas leaks, explosion, fire and other accidents will occur. Therefore, it is very important to ensure the safe operation of gas-fired boilers and prevent gas leakage

gas poisoning

carbon monoxide is a very toxic gas, which is colorless, tasteless and odorless, and its density is slightly heavier than that of air. Empty if your laboratory has old and new experimental machines, 0.06% in the gas is harmful to human body, 0.2% can make people unconscious, and 0.4% can cause death. The allowable loading and unloading concentration of carbon monoxide in the air shall be 0.02 g/m3. Due to the existence of carbon monoxide, blast furnace gas has strong toxicity. Gas leakage occurs in actual use. If the gas leakage area is not well ventilated, it will accumulate under the equipment or in the confined space; Improper use or failure to wear protective equipment by staff during patrol inspection will cause people to lack oxygen, suffocate, or even die, and bring immeasurable losses to people's lives and property. Therefore, special attention should be paid to prevent gas poisoning during use