Method for preparing ethylene from chlorinated organic waste

A method for preparing ethylene from chlorinated organic waste, comprising the steps of:

• forming a plasma atmosphere from a working gas, and subjecting the chlorinated organic waste to pyrolysis reaction and staged quenching in sequence in the plasma atmosphere to obtain a pyrolysis product, wherein the staged quenching comprises a first quenching and a second quenching performed in sequence, a quenching rate of the first quenching being greater than a quenching rate of the second quenching;
• and the working gas contains hydrogen element and carbon element, a molar ratio of the hydrogen element to the carbon element in the plasma atmosphere being greater than 2:1;
• and
• subjecting the pyrolysis product to gas-solid separation to obtain a gas-phase product and a solid-phase product, wherein the gas-phase product comprises ethylene.