Since the second half of this year, the PTA market has been improving all the way, which is an excellent opportunity to increase production and create efficiency. The Yangzi Petrochemical Chemical Plant seized the opportunity to complete the PTA three-line air compressor maintenance task on the basis of restarting the PTA second line in April. At the beginning of September, it started to drive, and opened the second and third line simultaneous high-load operation mode. In September, Yangzi Petrochemical produced more than 84,000 tons of PTA products, setting a new record for the highest monthly output in the past three years, achieving profitable profits. the goal of.
Recently, domestic polyester production and sales have declined, but compared with the beginning of the year, PTA prices are still at a high level and remain in a narrow range. The market situation continues to be good. In view of this, in order to seize the opportunities of efficiency market, all domestic PTA producers are in In the high-load operation state, the PTA operating rate has reached more than 80%. In order to grab the benefits, the PTA joint unit of Yangzi Petrochemical Chemical Plant maintains a two-line operation mode, with an average daily output of over 3,000 tons. At the peak, the small package is shipped out of the warehouse 1200 per day. Ton, large packaging tank truck loading out of the warehouse of about 2,000 tons, more than double the amount of storage in the past.
In order to achieve high production capacity of the plant, the PTA third line of the chemical plant is based on the principle of 'early driving, early innovation', and fine-tuning various preparations. From the inspection of the air compressor unit to the factory, the 'mechanical instrument management' and other professionals Strictly follow the plan, accurately control the reloading schedule, and ensure that the core unit completes the commissioning work in time. At the same time, the device performs the 'physical inspection' in advance, and the system combs the integrity of each valve, pipeline and pump. Within one week, the factory is dismantled. 84 isolation blinds, jogging or running more than 100 pumps, proofreading more than 200 regulating valves, troubleshooting more than 500 main process lines, lubricating more than 1000 on-site steam and heat tracing valves. Almost in accordance with The standard of driving the new device, the hidden trouble check of the device, laid a solid foundation for the long-term stable operation of the two-line long-term.
In the operation phase, the equipment management personnel continuously optimize and renovate, improve the stability of various aspects such as process, equipment, and electric instrument. By increasing the two-line gas-liquid separation tank and water washing treatment, the liquid phase entrainment in the exhaust gas is controlled to be too large, ensuring The drying effect of alumina and the stable operation of the air delivery system are required; the operation of the team is required to reduce the impurity content of the oxidation products, and the high-grade steam is replenished in real time to slow the materialization rate. The second-line dryer continuously runs for more than 180 days, creating a new operation cycle of the equipment. Record; for the previous high-pressure condensate pump multiple operation failures, equipment personnel to strengthen the research and maintenance efforts, eliminating the bottleneck of frequent switching, off-line maintenance. In addition, the device is in-depth process optimization, nitrogen, catalyst, sewage single row and The steam consumption has been greatly reduced. The comprehensive energy consumption of the second-line has decreased by 30 kg of standard oil per ton of PTA, down 15% from the previous month.
The two lines are running at the same time, and the staffing is the biggest test for the installation. To this end, the chemical plant coordinated the arrangement of some of the 'old PTA' personnel such as coal gas, ashless dispersant, and alkylation to form a PTA support team. On the one hand, they are arranged to carry out process learning and skill training in advance, master the theoretical knowledge, and then carry out the activities of 'teachers and teachers', a group of technical backbones of Jiao Yiping, on-site teaching, and a combination of theoretical and practical methods to promote them as soon as possible. On the other hand, the white-shift personnel transportation system is implemented. Three managers are employed every night to strengthen the emergency treatment, which effectively stabilizes the operation of the device and provides strong support for the high-yield and efficiency of the device.