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Device and method for extracting pure carbon monoxide and oxygen-rich gas by aid of cryogenic technology

A carbon monoxide and hydrogen-rich technology, used in refrigeration and liquefaction, liquefaction, cold treatment separation, etc., can solve the problems of unsatisfactory heat exchanger effect, many machines and high energy consumption

Inactive Publication Date: 2014-12-24
KAIFENG AIR SEPARATION GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of high energy consumption, many machines and unsatisfactory heat exchanger effects in the above-mentioned prior art, and provide a low energy-consumption, high-efficiency heat exchanger that provides cooling for the entire device through the Joule-Thomson effect. Device and method for producing pure carbon monoxide and hydrogen-rich gas by cryogenic method with good thermal effect and simple process flow

Method used

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  • Device and method for extracting pure carbon monoxide and oxygen-rich gas by aid of cryogenic technology
  • Device and method for extracting pure carbon monoxide and oxygen-rich gas by aid of cryogenic technology

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Embodiment 1

[0029] A device for producing pure carbon monoxide and hydrogen-rich gas by cryogenic method, such as figure 1 As shown, the device includes a front-end pretreatment unit 1 and a cryogenic separation and purification unit 2, and the cryogenic separation and purification unit 2 includes a first main heat exchanger 3, a second main heat exchanger 4, a first gas-liquid separation 5, the second gas-liquid separator 11, the 3rd gas-liquid separator 12, the 4th gas-liquid separator 13 and rectifying tower 6, and described rectifying tower 6 comprises the evaporator 61 of tower body itself and tower body bottom . The separated and purified feed gas is N-containing 2 , Ar, CH 4 and trace H 2 S, CO 2 CO and H 2 Mixed gas, the front-end pretreatment unit 1 is connected to a first pipeline 101 for inputting raw gas, the gas outlet of the front-end pretreatment unit 1 is connected to a second pipeline 102, and the second pipeline 102 passes through the first The main heat exchanger...

Embodiment 2

[0037] A method for producing pure carbon monoxide and hydrogen-rich gas by cryogenic method, wherein the device for producing pure carbon monoxide and rich hydrogen gas by cryogenic method used in the method is the device described in the first embodiment, and will not be repeated here. Methods include:

[0038] 1) Raw synthesis gas (CO+H 2 content ≥ 90% (mol%)) enters the front-end pretreatment unit 1 through the first pipeline 101, and removes the trace amount of methanol and carbon dioxide contained in the raw material synthesis gas through the molecular sieve adsorption in the front-end pretreatment unit 1, and removes impurities. The purified syngas enters the first main heat exchanger 3 through the second pipeline 102 and is cooled to a certain temperature (about 140K, the setting is different according to different working conditions), and then enters the distillation tower 6 through the second pipeline 102 for evaporation The heat exchanger 61 is cooled as a heat sou...

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Abstract

The invention relates to a device and a method for extracting pure carbon monoxide and oxygen-rich gas by the aid of a cryogenic technology. The device comprises a front-end pretreatment unit and a cryogenic separation and purification unit. The cryogenic separation and purification unit comprises a first main heat exchanger, a second main heat exchanger and a rectifying tower, the rectifying tower comprises a tower body and an evaporator at the bottom of the tower body, and the cryogenic separation and purification unit comprises a first gas and liquid separator, a second gas and liquid separator, a third gas and liquid separator and a fourth gas and liquid separator. The device and the method for extracting the pure carbon monoxide and oxygen-rich gas by the aid of the cryogenic technology have the advantages that cold flow can be provided for the integral device by the aid of a Joule-Thomson effect, accordingly, energy consumption is low, good heat exchange effects can be realized, and a technological process is simple; the perfect heat exchange effects can be realized by the aid of the device and the method, nitrogen circulation refrigeration and a large quantity of supplemented liquid nitrogen can be omitted, equipment can be reduced, and the energy consumption can be lowered.

Description

technical field [0001] The invention belongs to the field of cryogenic purification and separation of synthesis gas, in particular to the preparation of CO and (or) H by synthesis gas (obtained by gasification of biomass such as coal or petroleum) 2 A process for chemical products as raw materials, in particular to a device and method for producing pure carbon monoxide and hydrogen-rich gas by cryogenic method. Background technique [0002] CO and H 2 It is an important basic chemical raw material, widely used in chemical processes such as oxo synthesis, especially C 1 With the development of chemistry, CO has become an important raw material for a series of basic organic chemical products and intermediates, such as the carbonylation of methanol to produce acetic acid, acetic anhydride, formic acid, oxalic acid and dimethylformamide, as well as the synthesis of phosgene and the production of polycarbonate Esters, polyurethanes, synthetic metal carbonyl compounds, etc. Ine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25J3/02
CPCF25J3/0223F25J3/0252F25J3/0261F25J2200/40F25J2200/70F25J2205/02F25J2205/04F25J2210/42F25J2230/32F25J2245/02F25J2270/904
Inventor 卓跃光王剑锋王庆波韦向攀孙宇翟彦邦李美玲黄磊张苏宁苏建龙
Owner KAIFENG AIR SEPARATION GROUP
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