高炉煤气的高效利用技术
The utilization of low calorific value gas from blast furnace, hot stove and other sources has become a major focus in steel and iron industry. Low calorific value gas, generally defined as coal gas containing air, CO2 and other combustion products, is produced in the process of iron and steel production. These gases have high concentrations of ash, sulfur, dust and other substances resulting from the coal combustion process. The efficient utilization of these gases can reduce production costs and improve the environmental performance of the steel industry.
The utilization of low calorific value gas can be divided into three major categories: direct utilization, heat recovery and utilization, and chemical recovery and utilization. Direct utilization involves utilizing the gas in its original state, burning it to produce useful energy such as heat and electrical energy. Recovery and utilization of heat from the gas can include using it to preheat fuels and feedstock prior to their use in the production process. Chemical recovery and utilization involves conversion of the gas into other gaseous or liquid fuels or chemicals.
Direct utilization of low calorific value gas usually involves burning it in a boiler or stove to provide heat energy. This can also involve burning it in a turbine to generate electrical energy. Heat recovery and utilization of the gas can include using it to preheat air for the furnace or for other processes. This can also include using it to preheat coal for the furnace, as well as for other heating processes.
Chemical recovery and utilization of the gas involves obtaining useful products from the gas. This can involve recovery of tar, tar-oil, or synthetic gasoline, as well as recovery of sulfur, hydrogen and other compounds.
The efficient utilization of low calorific value gas can be promoted through the improvement or development of new technologies. A number of technologies have already been developed for direct utilization of the gas, including combustion technology and gas turbine technology. Technologies for recovery and utilization of the gas are usually integrated with other systems, such as plants preheating and cleaning of the gas prior to its use. For chemical recovery and utilization of the gas, there is still much research and development that needs to be carried out before the technology can be successfully applied in an industrial setting.
The utilization of low calorific value gas is critical for the steel and iron industry, as it helps to reduce both production costs and environmental impacts. By using these gases in a more efficient manner, the industry can reduce emissions of pollutants such as sulfur dioxide and particulate matter, while also reducing costs associated with thermal energy. The development of new technologies, as well as the improvement of existing ones, is therefore essential for the efficient utilization of these gases.
