摘要
为了提高彩管玻壳的生产质量,要求对做为玻璃炉窑燃料的天然气的热值进行精确控制。利用对空气流加热的方法在线测量燃气的热值,通过给燃气加入空气调整燃气热值,设计了燃气热值反馈调节系统。系统采用前馈和双闭环的调整方法,有效地保障了池炉燃气供应系统的良好的热值调节质量。试验表明反馈控制系统控制精度达到1.0%,响应时间为6s,采用热值反馈系统后燃气热值波动范围由原来的40.9～42.8MJ/m3减小为34.5～34.7MJ/m3,满足了玻壳生产对玻璃熔化质量的要求。
The heating value of the natural gas used as the fuel for the glass melting must be accurately controlled to improve the production quality of color TV tubes. A heating value feedback adjusting system was developed using the airflow heating method to measure the heating value online with air added to the gas to adjust the heating value. The feedforward control with two closed loops effectively guarantees the heating value quality of the gas supply. Tests showed that the control system accuracy was within 1.0% and the transient response time was within 6 s, with the range of heating values reduced from 40.9～42.8 MJ/m3 to 34.5～34.7 MJ/m3. Therefore, the system supplies the precision needed for the glass melting quality for TV tube production.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2003年第2期168-171,共4页
Journal of Tsinghua University(Science and Technology)
