Lanzhou Petrochemical Optimize Production Operation And Realize Energy Efficiency "Leading"

Lanzhou Petrochemical adheres to green and low-carbon development, relies on production process optimization, and strives to reduce production consumption, and has achieved good results. Especially after the first overhaul of the plant this year, in September, the energy consumption of ethylene in the 800,000-ton/year ethane-to-ethylene plant dropped to 360.45 kg standard oil, down 13.63% year-on-year. Lanzhou Petrochemical Company has been the energy efficiency leader of ethylene production enterprises with ethane as raw material selected by China Petroleum and Chemical Industry Federation for two consecutive years.

The operation of cracking furnace has an important influence on the energy consumption of ethylene production plant from ethane in Yulin. Lanzhou Petrochemical Yulin Chemical Co., Ltd. gives full play to the advantages of advanced cracking furnace technology, organizes personnel to operate accurately, keeps the cracking temperature in the best range all the time, recycles the waste heat of flue gas in the cracking furnace as much as possible, further promotes the long-term stable operation of the cracking furnace, ensures the full combustion of fuel gas, improves the thermal efficiency and ethylene yield of the cracking furnace, and reduces energy and material consumption.

Yulin Chemical Co., Ltd. makes full use of the quench water of ethylene plant to preheat the air in the burner of cracking furnace, which not only saves fuel gas, but also realizes the purpose of cooling the quench water, which promotes energy saving and consumption reduction. At the same time, in view of the low temperature and strong wind in winter in Yulin area, which is not conducive to chemical production, Yulin Chemical Co., Ltd. carefully maintained the air preheater to ensure smooth operation, ensure that the air temperature entering the furnace reached the standard, reduce the consumption of fuel gas and circulating water, alleviate the negative impact of windy weather on burner combustion, promote the smooth operation of the cracking furnace, and create good conditions for reducing energy consumption.

Yulin Chemical Co., Ltd. uses cascade steam system to save energy and reduce consumption. Ultra-high-pressure steam produced by ethylene plant is used in cracking gas compressor, propylene compressor, ethylene compressor and other major equipment. The ultra-high-pressure steam is decomposed into high-pressure, medium-pressure and low-pressure steam during the operation of the equipment, and enters the next-level pipe network to meet the energy needs of other devices, which not only ensures the rational utilization of steam energy, but also reduces the loss of steam venting. Each energy-using unit carefully recovers the steam condensate, exchanges heat with the desalted water entering the device, and then sends it to the desalted water device for recycling, so as to realize the reuse of heat energy. Since the beginning of this year, Yulin Chemical Co., Ltd. has controlled the fluctuation of daily energy consumption within 5%.