关键词: 饱和干气, 纯乙烯, 苯乙烯, 能耗, 投资, 产品质量, 苯单耗, 成本

Abstract:

The refinery's saturated dry gas is purified to obtain rich ethane gas, which is then subjected to ethane cracking to produce crude cracking gas, and then subjected to the process of producing ethylbenzene from dilute ethylene to produce ethylbenzene, and then produce styrene. This is a new route for producing styrene products. An analysis and comparison were made between this route and the traditional one that produce styrene by pure ethylene in terms of feedstocks, process flow, product quality, energy consumption, material consumption, investment, and cost. The results show that the quality of styrene products from the two routes is basically equivalent, and both meet the industry standard requirements for high-quality products. The main production material benzene has a similar unit consumption. The consumption of saturated dry gas in the saturated dry gas route is about 1.102 tons per ton styrene, which is about 3.92 times the ethylene unit consumption of the pure ethylene to styrene route. The investment and energy consumption of the saturated dry gas route are both higher than those of the pure ethylene to styrene route, about twice and 2.12 times higher, respectively. The pure ethylene to styrene route has advantages in device investment, energy consumption, and material consumption, and can be given priority consideration in refineries with abundant pure ethylene resources. The saturated dry gas route is suitable for refineries with scarce pure ethylene resources and abundant saturated dry gas.

Key words: saturated dry gas, pure ethylene, styrene, energy consumption, plant investment, quality of product, unit consumption of benzene, cost;