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钢铁厂在生产过程中,副产了大量可燃煤气。副产煤气热值范围在3～20MJ/Nm3,所含的热量可被利用,如:电厂、焦炉、热风炉、热轧厂等所需燃料,可用副产煤气部分替代天然气,减少煤气放散,降低公司的能耗成本和环境污染。使用副产煤气虽能得益却也面临难题。副产煤气的产量和成分取决于生产和工艺状况,煤气用户必须随之调整其操作。用气设备的启停操作改变了煤气用量,造成煤气管网压力波动,副产煤气成分变化则会引起热值波动,一旦管网压力波动或成分改变,将对管网上用气单元的燃烧过程产生不利影响。针对副产煤气利用的复杂情况,AMB、AMEH和BFI公司开发了高能效利用副产煤气的途径,应用于部分钢铁厂,如:改善煤气管网压力和流量分布的技术,具备供需分布显示和预报功能的煤气管理系统。介绍了煤气管网压力波动控制以及副产煤气利用的结果和经验。
Iron and steel plant in the production process, byproduct of a large number of combustible gas. By-product gas calorific value in the range of 3 ~ 20MJ / Nm3, contained in the heat can be utilized, such as: plant, oven, stove, hot rolling mill and other fuel requirements, the available partial replacement of natural by-product gas, reducing gas emission , Reduce the company’s energy costs and environmental pollution. Although the use of by-product gas can benefit but also face problems. The production and composition of by-product gas depends on the production and process conditions and the gas user must adjust its operation accordingly. Start and stop operation of the gas with the gas consumption apparatus is changed, pressure fluctuations resulting gas pipeline network, by-product gas composition changes will cause fluctuations in the calorific value, once the pipeline pressure fluctuations or composition changes, the pipe network will process gas combustion unit Have a negative impact. AMB, AMEH and BFI have developed energy-efficient ways to utilize by-product gas for the complex utilization of by-product gas and have been applied to some steel mills such as: technologies to improve the pressure and flow distribution in the gas pipelines, with supply and demand distribution display and Gas forecasting function of the system. The results of pressure fluctuation control of gas pipe network and utilization of by-product gas are introduced.