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Yangzi ethylene plant model furnace has been running for 2 weeks. The results showed that the temperature of the pyrolysis furnace flue gas decreased by about 35°C, the thermal efficiency increased by about 2%, and the operating load increased from 90% to 100%. Up to now, the model furnace has performed well and has fully achieved the expected energy-saving target. In the future, all cracking furnaces of Sinopec Group will use this as a model to carry out energy-saving reforms.
The energy consumption of the ethylene cracking furnace accounts for more than 70% of the energy consumption of the entire ethylene plant, which has a major impact on the composition of the economic and technical indexes of the ethylene plant. Most domestic ethylene plants were built in the last century. Cracking furnaces generally suffer from problems such as old furnace types, low thermal efficiency, high energy consumption, and short operating cycles.
In order to catch up with advanced foreign standards and provide reference standards for domestic ethylene cracker energy-saving reforms, Sinopec Group Company established the cracking furnace No. 01 in Yangzi Petrochemical New Area as a model stove in accordance with foreign advanced cracking furnace standards, utilizing a variety of advanced energy-saving technologies. Technology, reform the furnace. The renovation will begin in February this year, and will be handed in at the end of April and will be driven on May 25.
According to Hu Tiansheng, an ethylene expert from Yangzi Petrochemical's olefin plant, the transformation adopted the most advanced CBL furnace configuration of Sinopec, and installed a twisted sheet to increase the heat transfer efficiency of the furnace tube. The operation cycle of the cracking furnace was extended from 50 days. 80 days and increase the cracker load to 100%. At the same time, they also increased the heat exchange tube bundle in the convection section of the cracking furnace, which increased the heat transfer area by 20% to 30%, fully utilized the flue gas heat energy, increased the thermal efficiency of the cracking furnace, and reduced the temperature of the flue gas. The cracking furnace fan also uses the frequency conversion speed control device control system, which saves 20% to 25% of the original power saving; the cracking furnace refractory material is replaced with a new high-grade material, and the cracking furnace external wall temperature is reduced from 82°C to below 70°C. Reduced heat loss in cracking furnaces. In addition, the ash remover also changed from the original mechanical type to the acoustic wave type, and the ash removal efficiency was greatly improved.
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