Automatic control method of butadiene polymerization

• Main Authors: SUO YANHUI, LI GONGSHENG, ZOU YONGCHUN, SUN CHUNFU, LI GUOFENG, WANG XUEJING, LIU ZHONGQIANG, WANG ZHANGUO, BAI YANJUN, ZHAO WENZHUO
• Format: Patent
• Language: Chinese; English
• Published: 30.05.2012
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; CONTROLLING; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PHYSICS; REGULATING; SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES; THEIR PREPARATION OR CHEMICAL WORKING-UP

The invention relates to an automatic control method of butadiene polymerization, which comprises the steps that: the reaction temperature is divided into six stages, when the temperature in a reactor changes, the actual value of the temperature and the set valve of the temperature have difference, and the output valve of a PID regulation action temperature regulator is taken as the set valve of a liquid ammonia regulator; the temperature of the reactor is controlled within the normal range; when the pressure exceeds the high limit valve, the set valve of the temperature regulator at this moment is stored into a register, and the set valve of the temperature regulator is endowed with lower valve again; the pressure in the reactor is reduced; when the liquid level of ammonia reaches to the high limit valve, the output valve of the ammonia regulator is manually set into a full-closed state until the liquid level of ammonia is lower than low limit valve, and temperature-liquid level cascade stage adjustment is c