Method and system for automatic chlorine and hydrogen proportioning control of hydrogen chloride synthesis furnace, and synthesis furnace

• Main Authors: LI BINGXIN, SU ZHICHENG, HOU SHOUHUI, ZHANG MING, WANG FUHUA, WANG YUECHENG, LI XIU'EN, LI GANG
• Format: Patent
• Language: Chinese; English
• Published: 20.12.2019
• Subjects: CHEMISTRY; COMPOUNDS THEREOF; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS

The invention provides a method and system for automatic chlorine and hydrogen proportioning control of a hydrogen chloride synthesis furnace, and the synthesis furnace. The flow rate of chlorine is limited through low-level selection; the flow rate of hydrogen is limited through high-level selection; when the gas flow rate of hydrogen fluctuates and the fluctuation amount is lower than a first hydrogen set threshold value, or when the gas flow rate of chlorine fluctuates and the fluctuation amount is lower than a first chlorine set threshold value, the hydrogen flow rate and the chlorine flowrate are mutually sensed and locked through high-level selection and low-level selection, so that when load adjustment and flow disturbance occur, excessive ratio of hydrogen is ensured, the ratio ofhydrogen is larger than a safe low limit, and generation of free chlorine is avoided. Through adoption of a control strategy based on the cross restriction principle, the function of automatically adjusting the chlorine-hydro