基于残基在线检测的燃烧优化控制

Combustion Optimization Control Based on On-Line Detection of Residual Oxygen

针对加热炉大惯性、强滞后性等特点,通过分析其燃烧控制系统现状,提出了采用高温直插式氧化锆进行残氧量在线检测,并采用带交叉限制和残氧修正功能的燃烧优化控制技术,实现了空燃比和炉温的在线闭环优化控制,降低了燃料消耗和氧化烧损生成.运行结果表明:该技术应用于湘钢1#加热炉,优化控制了燃烧过程,吨钢煤气消耗降低2.84%,残氧控制降低1.94%,氧化烧损减少0.121%.

Aiming at the characteristics of large inertia and strong hysteresis of heating furnace,by analyzing the current situation of its combustion control system,it is proposed to use high temperature direct plug-in zirconia analyzer for on-line detection of residual oxygen.By using combustion optimization control technology with cross-restriction and residual oxygen correction function,online closed-loop optimal control of air-fuel ratio and furnace temperature was achieved,reducing fuel consumption and oxidative loss.The operation results showed that the technology was applied to Xiang Steel 1#heating furnace to control the combustion process optimally,while the gas consumption per ton of steel was reduced by 2.84%,the residual oxygen was reduced by 1.94%,and the oxidation loss was reduced by 0.121%.