The reasons for the high steam consumption of the cracked gas compressor in this chemical device include the high energy consumption of the cracked gas compressor turbine and the high steam unit consumption.
1. The energy consumption of the cracked gas compressor turbine is high: due to design reasons, under 100 loads, the opening of the "three-return-to-one" anti-surge valve is 15-20, and the opening of the "five-return" anti-surge valve is 15-20. When the anti-surge valve opening is 0-10, the ultra-high pressure steam consumption increases by about 4.22t/h compared to the fully closed anti-surge valve state, and the energy consumption increases by 3.09kgEO/t ethylene.
2. High steam consumption: the steam production of the quenching boiler of the cracking furnace is too low, and the ultra-high pressure steam production is about 40t/h lower than the design indicator, resulting in the cracking gas compressor turbine extraction steam volume being lower than the design Flow rate 50t/h. Cracking furnace Nos. 1 to 4 are heavy furnace cracking gases that are prone to coking, and their steam production differs greatly between the initial and final stages of operation. The quenching boiler adopts a two-in-one structure with a heat exchange area of ??57.5m2, which is larger than that of the light furnace quenching boiler. The thermal area is 19 less.