Slurry bubble column technology for preparing ethylene through acetylene hydrogenation and device thereof

Abstract

Provided are slurry bubble column technology for preparing ethylene through acetylene hydrogenation and a device thereof. The slurry bubble column technology includes adding water and then catalyst into a reactor, filling inert gases for replacing, heating, leading gas mixture of acetylene and hydrogen to enter in the reactor for reacting from the bottom of the reactor through a gas distributor, finally exhausting reaction products and unreacted feed gases from the top of the reactor, and separating to obtain the ethylene. The unreacted feed gases and the feed gases are mixed and then enter the reactor again for reacting. The reactor comprises a reaction gas inlet at the bottom, the gas distributor and a material liquid exhaust port, a reactor barrel body is arranged on an expended section on the upper portion of a slurry bubble column reactor, and a catalyst feeding port and a gas outlet are arranged at the top of the reactor. The slurry bubble column for preparing the ethylene through the acetylene hydrogenation is simple in structure, overcomes the phenomenon of temperature runaway in a fixed bed reactor and improves the conversion rate and selectivity of the reaction, and the operation is easy to control.

Description

technical field [0001] The invention relates to a reactor and a method for preparing ethylene by hydrogenation of acetylene, and further relates to a process and a device for preparing ethylene by hydrogenation of high-concentration acetylene in a slurry bed. Background technique [0002] Ethylene is the most basic raw material for the production of the three major synthetic materials and organic chemical products. Its products are widely used in national economy, people's life, national defense and other fields, and are the "mother of organic synthesis". The production of ethylene is mainly produced by the cracking of petroleum hydrocarbons. The ethylene output has become a symbol to measure the development level of a country's petrochemical industry, and its production capacity is regarded as the embodiment of a country's economic strength. Facing the shortage of oil resources and rising international oil prices, the source of raw materials has become a bottleneck in the d...

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Problems solved by technology

The higher the concentration of the reactant acetylene, the faster the reaction speed and the more heat release, the reactor is prone to "flying temperature", the bed temperature cannot be effectively controlled, and the catalyst is prone to serious problems such as sintering;

[0007] (2) The fixed bed catalytic hydrogenation is used for the reaction, and the heat exchange capacity is poor

In order to remove "green oil", the regeneration time of the catalyst in the fixed bed reactor is increased, which seriously affects the treatment capacity of the bed

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