Safety control method of device for preparing ethylene through acetylene hydrogenation

Abstract

The invention discloses a safety control method of a device for preparing ethylene through acetylene hydrogenation. The safety control method of the device for preparing the ethylene through acetylenehydrogenation comprises the steps of comprising a hydrogen inlet pipeline and an acetylene inlet pipeline; arranging two sets of hydrogen flow instruments, a set of hydrogen shut-off valve and a setof hydrogen adjusting valve on the hydrogen inlet pipeline; arranging two sets of acetylene flow instruments, a set of acetylene interlocking shut-off valve and a set of acetylene adjusting valve on the acetylene inlet pipeline; further comprising a set of PLC (Programmable Logic Controller) system; adopting an acetylene single circuit for adjusting, adopting proportion setting for adjusting a hydrogen loop, and ensuring the ratio of hydrogen to alkyne to be larger than 1 / 3, so that the partial pressure of acetylene is reduced, the safety of the whole control method is ensured, the hydrogen / alkyne ratio is accurately controlled to the greatest extent while the partial pressure of the acetylene is controlled at the same time, the hydrogen circulation volume is reduced, and the aims of safety, low consumption and environment protection are achieved.

Description

technical field [0001] The invention relates to a technology for producing ethylene by hydrogenation of acetylene, in particular to a safety control method for a device for producing ethylene by hydrogenation of acetylene. Background technique [0002] Acetylene hydrogenation to ethylene is a newly developed technology, lacking control methods. According to experimental data, when the ratio of hydrogen to acetylene is 1:3, the reaction produces the highest efficiency of ethylene. According to the characteristics of acetylene, when its pressure is too high (1.5MPa), it will Explosion occurs, so the pressure of acetylene must be accurately controlled. At the same time, the higher the reaction pressure, the smaller the volume of the reactor, which is conducive to industrialization and scale. Therefore, it is necessary to increase the reaction pressure as much as possible under the premise of ensuring safety, so that the acetylene The partial pressure in the mixed gas and the co...

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Problems solved by technology

[0002] Acetylene hydrogenation to ethylene is a newly developed technology, lacking control methods. According to experimental data, when the ratio of hydrogen to acetylene is 1:3, the reaction produces the highest efficiency of ethylene. According to the characteristics of acetylene, when its pressure is too high (1.5MPa), it will Explosion occurs, so the pressure of acetylene must be accurately controlled. At the same time, the higher the reaction pressure, the smaller the volume of the reactor, which is conducive to industrialization and scale. Therefore, it is necessary to increase the reaction pressure as much as possible under the premise of ensuring safety, so that the acetylene The partial pressure in the mixed gas and the control of the hydrogen-alkyne ratio become the key to the hydrogenation of acetylene to ethylene technology

[0003] At present, there is no practical control method for acetylene hydrogenation to ethylene technology

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