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A high-efficiency and energy-saving rectification process for high-purity carbon monoxide and hydrogen

A carbon monoxide, high-efficiency and energy-saving technology, applied in the direction of carbon monoxide, chemical industry, hydrogen/synthesis gas production, etc., can solve the problems of removal and hydrogen extraction rate reduction, achieve the effect of reducing heat load, saving equipment investment, and improving economic benefits

Active Publication Date: 2018-02-02
SHANGHAI RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The methane scrubber in the device of this invention does not contain a reboiler, so it cannot be removed in one tower at one time, and a stripper needs to be added to discharge a hydrogen-rich gas (purity<99%) at the top of the stripper, and the gas It cannot be used as a high-purity hydrogen product so that the extraction rate of hydrogen is reduced

Method used

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  • A high-efficiency and energy-saving rectification process for high-purity carbon monoxide and hydrogen
  • A high-efficiency and energy-saving rectification process for high-purity carbon monoxide and hydrogen

Examples

Experimental program
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Effect test

Embodiment 1

[0035] A high-efficiency and energy-saving rectification process for high-purity carbon monoxide and hydrogen, such as figure 1 As shown, it includes the following steps: After pretreatment such as desulfurization and decarburization, the synthesis gas or coke oven gas is obtained to contain CO, H 2 , N 2 , O 2 、CH 4, Ar raw material mixed gas 16; the raw material mixed gas 16 is sent to the hydrogen membrane separator 4 to extract most of the hydrogen, and a high-purity hydrogen product 14 (purity > 99%) is obtained at the top side of the hydrogen membrane separator 4, and the tower The tail gas mixture material 12 on one side of the kettle is sent to the main heat exchanger 8 for precooling and then enters the rectification system;

[0036] After the tail gas mixture material 12 obtained by membrane separation is pre-cooled by the main heat exchanger 8, it enters the bottom liquid of the dehydrogenation tower 1 for rectification, thereby making full use of the heat energy...

Embodiment 2

[0046] In this embodiment, the steps of the method are mostly the same as in Example 1, except that the number of theoretical plates of the dehydrogenation tower is 10, the operating pressure at the top of the tower is 0.2Mpa, the pressure drop of the tower is 5.0kPa, the reflux ratio is 1.2, and the temperature at the top of the tower is The temperature of the tower is -196°C, the temperature of the tower is -190°C; the number of theoretical plates of the denitrification tower is 40, the peak height of the packing is 35mm, the operating pressure at the top of the tower is 0.1Mpa, the pressure drop of the tower is 3.0kPa, and the reflux ratio is 1.5. The temperature at the top of the tower is -195°C, and the temperature at the bottom of the tower is -190°C; the number of theoretical plates of the carbon monoxide extraction tower is 40, the peak height of the packing is 25mm, the operating pressure at the top of the tower is 0.01Mpa, the pressure drop of the tower is 3.0kPa, and ...

Embodiment 3

[0048] In this embodiment, the steps of the method are mostly the same as in Example 1, except that the number of theoretical plates of the dehydrogenation tower is 40, the operating pressure at the top of the tower is 0.3Mpa, the pressure drop of the tower is 7.0kPa, the reflux ratio is 2.5, and the temperature at the top of the tower is The temperature of the tower is -190°C, the temperature of the tower is -188°C; the number of theoretical plates of the denitrification tower is 80, the peak height of the packing is 20mm, the operating pressure at the top of the tower is 0.2Mpa, the pressure drop of the tower is 4.5kPa, and the reflux ratio is 3.0. The temperature at the top of the tower is -190°C, and the temperature at the bottom of the tower is -188°C; the number of theoretical plates of the carbon monoxide extraction tower is 80, the peak height of the packing is 15mm, the operating pressure at the top of the tower is 0.1Mpa, the pressure drop of the tower is 4.5kPa, and t...

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Abstract

The invention relates to a high-efficiency energy-saving high-purity carbon monoxide and hydrogen gas rectification technique which comprises the following steps: a raw material gas mixture is sent into a hydrogen gas membrane separator, and high-purity hydrogen gas obtained from one side of the tower top is output as a product; a tail gas mixture obtained from one side of the tower bottom is subjected to heat exchange cooling by a primary heat exchanger and sent into a dehydrogenation tower to continue rectification separation, and a hydrogen-rich gas mixture obtained from the tower top of the dehydrogenation tower is reheated by the primary heat exchanger and output as a hydrogen-rich product; the tower bottom material of the dehydrogenation tower is sent into a denitrification tower to continue rectification, the tower top material of the denitrification tower is discharged, reheated by the primary heat exchanger and sent into an external pipeline, the tower bottom material of the denitrification tower is sent into a carbon monoxide extraction tower to continue rectification, and the tower top material of the extraction tower is discharged, reheated by the primary heat exchanger and output as a high-purity carbon monoxide product; and the tower bottom material of the extraction tower is discharged, reheated by the primary heat exchanger and output as a fuel gas product. Compared with the prior art, the technique has the advantages of high product purity, high extraction rate, sufficient energy utilization and the like, and is convenient to operate.

Description

technical field [0001] The invention relates to a rectification process of high-purity carbon monoxide and hydrogen, in particular to a high-efficiency and energy-saving rectification process of high-purity carbon monoxide and hydrogen. Background technique [0002] Coal gasification technology refers to the clean and efficient conversion of coal into a kind of synthetic gas. It is an important way and technical means to cleanly utilize coal resources at the present stage, and it is also an indispensable source of raw materials in large-scale coal chemical system projects at the present stage. After the synthesis gas is purified, it can obtain the two most important raw materials CO and H for the development of downstream products of the coal chemical industry. 2 , both of which are high calorific value gases, not only can be used as fuel gas, but also can be used to produce many chemical products. amide, succinic acid, acrylic acid, methyl formate, etc.). [0003] The sou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B3/50C01B32/40
CPCC01B3/501C01B2203/0405C01B2203/0465Y02P20/10Y02P20/50
Inventor 田叶盛李虎林姜永悦周建跃龙磊吉永喆蔡扬
Owner SHANGHAI RES INST OF CHEM IND