Since February, the domestic market demand for propylene has continued to increase. Qilu Petrochemical keeps a close eye on market changes, and actively adopts measures such as optimizing raw material structure, flexibly adjusting production, and carrying out employee training to maintain high-load production of ethylene plants. From February to March, it produced 58,000 tons of propylene, and high-value polymer-grade propylene accounted for over 99.56. %, the effect is remarkable.
Propylene is a kind of high value-added chemical raw material and the basic raw material of the three major synthetic materials. In February, Qilu Petrochemical's production technology department, planning operation department, finance department and other departments conducted comprehensive analysis and judgment, predicting that the demand for propylene will remain at a relatively high level, and then formulated a series of optimization measures to give full play to the advantages of refining and chemical integration, and create a new way to increase production. Effectively create favorable conditions.
Sufficient high-quality raw materials are the prerequisite for more propylene production. They control the quality of mutually supplied raw materials such as naphtha and hydrocracking tail oil from the source. According to the operation of light hydrocarbon furnaces and the inventory of light hydrocarbons and ethane, the capacity will be adjusted to ensure the supply of purchased raw materials. In the case of high tail oil propylene yield, according to the operating conditions of the 13 ethylene plant cracking furnaces in operation and the actual demand of downstream ethylene, the raw materials are continuously optimized and balanced, and real-time switch adjustments are made according to product benefits and market demand.
The olefin plant undertaking the production task has increased its production optimization efforts, continuously optimized the cracking depth, and appropriately reduced the hydrogenation tail oil and naphtha cracking depth; increased the total input of raw materials for the plant, and increased the production of propylene while ensuring the stability of ethylene production. When the tail oil propylene yield is higher than naphtha, increase the tail oil input in time, and at the same time finely operate the separation system, carry out predictive maintenance of the reactor control system, optimize the operation of the carbon three reactor, and control the propylene tower sensitively Plate temperature reduces propylene loss.
Model Worker Innovation Studio participated in solving problems. In view of the fact that the composition of cracking raw materials is complex and the cracking performance varies greatly, Gaohui Model Labor Innovation Studio repeatedly measured the marginal benefits, found the most reasonable cracking depth, and came up with a profit-making plan. Yu Jian’s Model Labor Innovation Studio, together with the post employees, fine-tuned the parameters of the compression system according to the different raw material operating modes of the cracking furnace to achieve the staged cracking of different qualities of naphtha, and give full play to the best performance of the cracked raw materials.
The smooth operation of the 501 propylene compressor, the core unit of the ethylene plant, is one of the keys to increasing production and efficiency, but the compressor shaft displacement at the end of the operating cycle has a tendency to increase. To this end, the olefin plant established a special protection team to focus on monitoring the 501 propylene compressor. Functional departments such as production technology coordinated the cracking workshop to adjust the temperature of the cracking furnace and the amount of oil in time for upstream raw material changes. The first-line teams started from aspects such as controlling the oil temperature and carried out small-index labor competitions to ensure the stable operation of the units under high-load conditions. At the same time, the factory also adopts online expansion + offline centralized training methods, and flexibly carry out training according to employees' spare time.
Source: Chemical Network
