Quenching method for pyrolysis gas in ethylene production
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This post was last edited by lsl343952854 on 2013-7-17 08:33. Quenching methods are divided into direct quenching and indirect quenching. In modern cracking units, the process follows indirect quenching – direct quenching – washing and separation. The advantages of indirect quenching include the recovery of high-quality thermal energy; it generates high-pressure steam that can be used as a power source to drive the compressors for cracking gases, ethylene, and propylene, as well as turbines for power generation and high-pressure pumps. It also helps to prevent secondary reactions from occurring.
Quenching technology for pyrolysis gas is an important part of pyrolysis technology. The quenching of pyrolysis gas is mainly achieved through quenching boilers. In a cracking unit, the quench boiler performs two main functions: first, it quenches the high-temperature cracking gas coming out of the cracking furnace using this quench boiler, thereby preventing secondary reactions and ensuring that the yield of olefins does not decrease; second, it recovers the high thermal energy contained in the cracking gas in the form of high-pressure steam, which helps to reduce energy consumption and improve the economic efficiency of the ethylene production facility.
It’s basically about improving energy efficiency
First, rapid cooling stops the pyrolysis reaction, and only then is energy recovery possible; of course, this energy is enormous. The compressors in the ethylene plant are all driven by this steam