Intelligent micro-interface reaction system and method for preparing ethylene glycol by ethylene oxide method

Abstract

The invention provides an intelligent micro-interface reaction system and method for preparing ethylene glycol through an ethylene oxide method. The intelligent micro-interface reaction system comprises a first reactor, a second reactor and a stirring kettle, and the stirring kettle is filled with a NaHCO3 agent material; a micro-interface unit is arranged on the outer side of the stirring kettle and is formed by arranging a plurality of external micro-interface generators; a main pipeline introduced into the micro-interface unit is connected with an ethylene oxide feeding pipeline and a water source pipeline at the same time, ethylene oxide is introduced into the micro-interface unit from a gas source conveying pipeline, and a water source enters the micro-interface unit to be used for breaking ethylene oxide gas into micron-sized micro-bubbles; the micro-interface units are arranged on the outer side of the stirring kettle and in the reactor, so that ethylene oxide and the water source are crushed into the micro-bubbles before reaction, the phase boundary mass transfer area between the ethylene oxide and the water source is increased, full-automatic control is realized through the intelligent control system, and the working efficiency is improved.

Description

technical field [0001] The invention relates to the field of ethylene glycol preparation, in particular to an intelligent micro-interface reaction system and method for preparing ethylene glycol by an ethylene oxide method. Background technique [0002] Ethylene glycol (EG) is the simplest and most important aliphatic diol, a colorless, odorless, sweet liquid that can be mixed with water in any proportion. Ethylene glycol has a wide range of uses in industry, and can be used to produce polyethylene terephthalate (raw material for synthetic polyester fibers and polyester plastics), and to produce other polyester resins, unsaturated polyester resins, Non-ionic surfactants, ethanolamine, and explosives; high-purity ethylene glycol can be used to configure antifreeze and thawing agents for cooling systems in automobiles, aviation industries, and instrumentation industries, as well as to produce solvents, lubricants, softeners, and enhancers. Plastics, etc.; Ethylene glycol is a...

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Problems solved by technology

[0006] The first object of the present invention is to provide a reaction system for preparing ethylene glycol by the ethylene oxide method. The intelligent micro-interface reaction system is provided with a micro-interface unit on the outside of the stirred tank and inside the first reactor and the second reactor. The carbon dioxide is efficiently broken into micron-sized bubbles through the micro-interface generator, and dispersed into the liquid raw material to form a micro-interface system, which increases the mass transfer area of ​​the phase boundary between ethylene oxide and the water source, thus solving the problem of environmental problems in the prior art Oxygen and water cannot be fully mixed inside the reactor, resulting in high reaction pressure, high hydrogen-ester ratio, and low liquid hourly space velocity

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