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A process and device for acetylene concentration

An acetylene and process technology, applied in the field of acetylene preparation, can solve problems such as incomplete separation of advanced alkynes, and achieve the effects of reducing the content of advanced alkynes, reducing usage, and high purity

Active Publication Date: 2019-05-21
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention can effectively solve the problem of incomplete separation of some higher alkynes in the process of acetylene concentration

Method used

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  • A process and device for acetylene concentration
  • A process and device for acetylene concentration
  • A process and device for acetylene concentration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as figure 1 As shown, the mixed gas containing acetylene is compressed by the compressor I and then boosted from normal pressure to 0.15MPa (absolute), then enters the bottom of the pre-absorption tower, and is in countercurrent contact with the pre-absorption solvent diesel oil from the top, and the higher acetylene in the dilute acetylene Hydrocarbons (propadiene, diacetylene, etc.) are absorbed, and the pre-absorption tower is a packed tower. After the mixed gas is pre-absorbed, it comes out from the top of the pre-absorption tower, and then goes through compressor II for a second pressurization. After the pressure is increased to 0.7MPa (absolute), it enters the bottom of the main absorption tower, and the main absorption solvent dimethylformamide from the top. The acetylene and a small amount of higher alkynes in the gas are absorbed by the main solvent, and the insoluble gases such as hydrogen, methane, and carbon monoxide are discharged from the top of the m...

Embodiment 2

[0032] Such as figure 1 As shown, the mixed gas containing acetylene is compressed by the compressor I and then boosted from normal pressure to 0.35MPa (absolute), then enters the bottom of the pre-absorption tower, contacts with the pre-absorption solvent decene from the top in countercurrent contact, and the high-grade in the dilute acetylene Alkynes (propadiene, diacetylene, etc.) are absorbed, and the pre-absorption tower is a tray tower. After the mixed gas is pre-absorbed, it comes out from the top of the pre-absorption tower, and then goes through the compressor II for a second pressurization. After the pressure is increased to 1.5MPa (absolute), it enters the bottom of the main absorption tower, and the main absorption solvent N- from the top. Methylpyrrolidone is in countercurrent contact, acetylene and a small amount of higher alkyne in the gas are absorbed by the main solvent, and insoluble gases such as hydrogen, methane, and carbon monoxide are discharged from the...

Embodiment 3

[0037] Such as figure 1 As shown, the mixed gas containing acetylene is compressed by the compressor I and then boosted from normal pressure to 0.5MPa (absolute), then enters the bottom of the pre-absorption tower, and contacts with the pre-absorption solvent diethylene glycol dibutyl ether from the top in countercurrent, Higher alkynes (propadiene, diacetylene, etc.) in dilute acetylene are absorbed, and the pre-absorption tower is a plate tower. After the mixed gas is pre-absorbed, it comes out of the top of the pre-absorption tower, and then goes through the compressor II for a second pressure increase. After the pressure is increased to 2.5MPa (absolute), it enters the bottom of the main absorption tower, and is mixed with the main absorption solvent liquid ammonia from the top. Countercurrent contact, acetylene and a small amount of higher alkynes in the gas are absorbed by the main solvent, and insoluble gases such as hydrogen, methane, and carbon monoxide are discharged...

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Abstract

The invention relates to an acetylene concentration process and device, belonging to the technical field of acetylene preparation. The steps of the process are that acetylene containing mixed gases are passed into a condensing machine I, the condensed mixed gases are then passed into the bottom of a pre-absorption tower, and are in backwash touch with solution one; the mixed gases after being absorbed with solution one are passed into a condensing machine II, after being condensed are passed into the bottom of a main absorption tower, and are in backwash touch with solution two; the solution two absorbing acetylene is passed into a desorption tower to be desorbed, to obtain acetylene product. The invention also relates to an acetylene concentration device, including the pre-absorption tower, the main absorption tower, the desorption tower, and the condensing machine I and the condensing machine II. The process and device can raise the purity and production quantity of acetylene, reduce the content of senior alkyne in product, prevent the waste and pollution problem of second time processing of concentrated sulfuric acid, and reduce the use quantity of absorption agent in the absorption process, lower the energy consumption of the whole process. The invention is an economical, unpolluted, environmentally friendly, less absorption solution, high product purity process as well as device.

Description

technical field [0001] The invention belongs to the technical field of acetylene preparation, in particular to a method for separating and obtaining high-concentration acetylene from a mixed gas containing acetylene, in particular to a process and device for enriching acetylene. Background technique [0002] The process of producing acetylene from natural gas or other methane-rich gas, after the reaction, a mixed gas containing acetylene is obtained. In addition to acetylene, the mixed gas generally contains higher alkynes such as propadiene, diacetylene, butadiene, and vinyl acetylene, as well as gases such as hydrogen, methane, carbon monoxide, and carbon dioxide. [0003] In actual production, it is necessary to separate and concentrate the mixed gas containing acetylene to obtain high-concentration acetylene products. At present, the acetylene obtained by the acetylene concentration process still contains a certain amount of higher alkynes such as propadiene, which need...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C11/24C07C7/00C07C7/11
CPCC07C7/005C07C7/11C07C11/24
Inventor 温少桦毛震波胡文励贾绘如熊国焱谌晓玲陈晓华
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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