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High-temperature hydrogenation and purification process for liquefied gas materials

A purification process and technology for liquefied gas, which is used in the processing of gas mixtures, the petroleum industry, and the treatment of hydrocarbon oil. Good and investment-saving effect

Active Publication Date: 2014-05-07
山东海成石化工程设计有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention relates to a high-temperature hydrogenation purification process for liquefied gas materials, which mainly solves the technical problems of long process flow, large investment and high energy consumption in existing liquefied gas purification methods

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with accompanying drawing.

[0023] The purification process of liquefied gas raw materials with a processing scale of 250,000 tons / year is used to illustrate, and the process is as follows figure 1 shown.

[0024] 1) The raw material liquefied gas 101 first passes through the raw material product heat exchanger 1, exchanges heat with the product at the outlet of the hydrogenation reactor 3, then passes through the heating furnace 2, and then enters the hydrogenation reactor 3 from the top to hydrogenate and saturate the olefins in the material For alkanes, simultaneously convert sulfides, oxides, nitrides and halides into hydrogen sulfide, water, ammonia and hydrogen halides respectively. The operating pressure of the reactor is 2.0-3.0MPaG, the operating temperature is 160-400°C, the diameter is 1600mm, the filling height is 7200mm, and the hydrogenation catalyst is 14.47m 3 .

[0025] 2) After ex...

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Abstract

The invention relates to a purification process of liquefied gas and particularly provides a high-temperature hydrogenation and purification process for liquefied gas materials. The high-temperature hydrogenation and purification process is characterized by comprising the following steps: (1) carrying out heat exchange on raw material liquefied gas and a reactor outlet product in a heat exchanger, heating by a heating furnace to a reaction temperature, then feeding the material into a reactor from the top, carrying out saturation hydrogenation on olefin in the material to obtain alkane, and respectively hydrogenating and converting sulfide, oxide, nitride and halide into hydrogen sulfide, water, ammonia and hydrogen halide; (2) carrying out sufficient heat exchange on the reactor outlet product and the raw material by an efficient heat exchanger, carrying out water cooling by a water cooler and enabling the material to enter a gas-liquid separation tank, compressing a flashing gas phase and fresh hydrogen by a compressor and circulating to the raw material liquefied gas; (3) enabling the flashing liquid phase to enter an alkali washing deposition tank and carrying out fiber membrane alkali washing to remove hydrogen sulfide, ammonia and hydrogen halide; (4) enabling the material which is subjected to the alkali washing to enter a dearsenicator, and removing arsenic and metal to obtain refined liquefied gas. The high-temperature hydrogenation and purification process mainly aims at a project which is very strict in requirement on the impurity content of a catalyst, and is short in flow, small in investment, low in cost and less in solid wastes.

Description

technical field [0001] The invention relates to a purification process of liquefied gas, in particular to a high-temperature hydrogenation purification process of liquefied gas materials. The present invention is mainly aimed at projects requiring very strict impurity content of raw materials for catalysts, such as projects such as propane dehydrogenation, isobutane dehydrogenation and butane isomerization, which require butene and refined alkane liquefied gas with extremely low impurities as raw materials . Background technique [0002] In recent years, with the continuous deepening and development of the research and development of the use of C4 fractions, the deep processing projects for the by-product alkane liquefied gas of aromatization, isomerization and alkylation devices have been newly built, isobutane dehydrogenation, propane dehydrogenation Hydrogen, propane-isobutane mixed dehydrogenation, butane isomerization and other projects have been constructed successive...

Claims

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Application Information

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IPC IPC(8): C10G70/02
Inventor 王春生冯玉坤袁树成张明林祥钦
Owner 山东海成石化工程设计有限公司
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