The advanced control project of ethylene recovery system passed the acceptance

The "Advanced Control of Ethylene Plant Ethylene Recovery System" project of China National Petroleum Corporation under the joint responsibility of Petroleum University (Beijing) and PetroChina Fushun Branch's ethylene chemical company has passed the acceptance test.
The advanced control technology was applied to the ethylene distillation tower to successfully develop and implement soft instruments with high purity purity of ethylene products on the top side of the tower and soft instruments with recycled ethane concentration at the bottom of the tower. This solved the problem of long time on-line chromatographic analysis. Lag problem with online chromatographic value correction soft meter. A multivariable advanced control strategy for ethylene distillation tower was put forward. The purity of the ethylene product was measured with the amount of overhead line at the top of the tower and the flow of the heating medium at the bottom of the reboiler. Ethylene product purity is controlled at a given point, while circulating ethane concentration is controlled in intervals.
The advanced control technology was used on the acetylene hydrogenation reactor to successfully develop and implement a soft instrument for the acetylene concentration at the outlet of the three-stage reactor bed, the conversion rate of each segment, and selective soft meters, while solving the problem of long time on-line chromatographic analysis. Lag problem, also use online chromatographic value correction soft instrument. Similarly, a multivariable advanced control strategy for the acetylene hydrogenation reactor was proposed. Each bed was operated with a hydrogen acetylene controller with an outlet acetylene concentration and a multi-variable advanced controller with conversion rate selectivity. The ratio of hydrogen to acetylene, which is the ratio of hydrogen to acetylene, plays an important role in increasing ethylene production. At present, advanced control technology is used in the ethylene plant to achieve smooth production, prolong the service life of the catalyst and regeneration cycle, achieve card edge control, and increase ethylene yield.