Low-pressure condensate waste heat recycling system of ethylene oxide/ethylene glycol device

Abstract

The invention discloses a low-pressure condensate waste heat recycling system of an ethylene oxide / ethylene glycol device. Comprising a reactor, a washing tower communicated with the reactor, a stripping tower communicated with the washing tower, a first flash tank communicated with the stripping tower, a dioxide stripping tower and a regeneration tower which are communicated with a gas phase outlet of the first flash tank, a second flash tank communicated with a liquid phase outlet of the first flash tank, and a condensate tank communicated with a liquid phase outlet of the second flash tank, and a gas phase outlet of the second flash tank is communicated with the stripping tower to serve as stripping steam. The low-pressure condensate waste heat recycling system of the ethylene oxide / ethylene glycol device can recycle waste heat of condensate.

Description

technical field

[0001] The invention relates to the field of ethylene oxide / ethylene glycol devices, in particular to a low-pressure condensate waste heat recovery and utilization system of an ethylene oxide / ethylene glycol device. Background technique

[0002] The existing ethylene oxide / ethylene glycol plant adopts the ethylene oxygen direct oxidation process technology, and the raw material gas ethylene, oxygen and the inhibitor dichloroethane (EDC) are added to the circulating gas at the inlet of the reactor, and the high temperature and high pressure are used. Reaction under conditions to produce ethylene oxide. After the ethylene oxide is generated, it is absorbed by the circulating water through the washing tower, and sent to the stripping tower for stripping and refining. The stripping process needs to consume a lot of steam. The production process of the device needs to use steam of different levels of pressure. Part of the low-pressure steam and the condensate for...

Images