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Method and device for removing CO2 from conversion gas of synthetic ammonia

A technology for changing gas and synthesizing ammonia, which is applied in the field of CO2 removal, can solve the problems that have not been reported, and achieve the effects of increasing gas treatment capacity, reducing circulation volume, and increasing effective interface area

Inactive Publication Date: 2011-07-20
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] At present, the absorption of carbon dioxide in the super-heavy machine is mainly based on some research on the chemical absorption method, and the super-heavy machine is used as the absorption equipment, and the physical absorption solvent-NHD solvent is used as the absorbent to carry out CO2 absorption. 2 There is no report about the removal at home and abroad

Method used

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  • Method and device for removing CO2 from conversion gas of synthetic ammonia
  • Method and device for removing CO2 from conversion gas of synthetic ammonia
  • Method and device for removing CO2 from conversion gas of synthetic ammonia

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Synthetic ammonia shift gas composition: hydrogen: 52.20%; carbon dioxide: 28.40%; nitrogen: 18.58%; carbon monoxide: 0.26%, the rest is a small amount of inert gas.

[0044] Absorbent composition: fresh NHD solvent.

[0045] Turn on the lean solution pump 10 to send the fresh NHD solvent to the ammonia cooler 12 to cool down to -5°C. Turn on the motor 6, adjust the rotor speed to 1200 r / min, adjust the flow meter to control the flow of the NHD solvent, send the cooled NHD solvent to the overweight machine 3, and cool it down to -5°C. Adjust the gas pressure at 2.7 MPa, it will contain 28.4% CO 2 The synthetic ammonia conversion gas enters the super-heavy machine through the gas inlet 2 of the super-heavy machine, and the adjusted gas volume is 60 m 3 h -1 , adjust the flow meter to control the flow of NHD solvent to 3m 3 h -1 , into the super-heavy machine through the liquid inlet 5, the NHD solvent is evenly sprayed on the inside of the packing layer through the ...

Embodiment 2

[0047] The process flow is the same as Example 1, and Example 2 investigates the content of carbon dioxide in the outlet gas of the overweight machine under different conditions such as temperature, pressure, gas flow rate, liquid flow rate, and rotor speed. The test results are shown in Table 1.

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Abstract

The invention belongs to the technical field of CO2 removal from conversion gas of synthetic ammonia, in particular relates to a method and device for removing CO2 from conversion gas of synthetic ammonia. The method comprises the steps: the conversion gas of synthetic ammonia and an absorption solution are subjected to countercurrent contact and crosscurrent contact in a high gravity machine, and tremendous centrifugal force is generated by means of high-speed rotation of filler so that the absorption solution comes into contact with gas to complete the removal of CO2. The device comprises the high gravity machine, wherein the gas, namely the conversion gas of synthetic ammonia, is fed to a conversion section through a gas inlet of the high gravity machine, a gas outlet of the high gravity machine is connected with a purified gas section, a liquid inlet of the high gravity machine is connected with a lean solution tank filled with NHD solvent via a lean solution pump, an ammonia cooler is arranged between the liquid inlet of the high gravity machine and the lean solution pump, and a liquid outlet of the high gravity machine is connected with a pregnant solution tank. The method and the device have the advantages: the technological flow is simple, the maintenance cost of equipment is lowered, and the regeneration energy consumption of the entire decarbonization procedure is reduced.

Description

technical field [0001] The invention belongs to the removal of CO in the synthetic ammonia shift gas 2 The technical field, specifically related to a super-heavy machine as the absorption equipment, using NHD solvent as the absorbent to remove CO in the ammonia shift gas 2 The method is suitable for the purification of coal-to-ammonia shift gas and CO in natural gas, oilfield gas, refinery gas and city gas 2 removal. Background technique [0002] With the rapid development of industry, the world is increasingly dependent on fossil fuels. Human beings use carbon-containing compound fuels such as coal, oil, and natural gas on a large scale. The unrestricted discharge of carbon dioxide is bound to have a profound impact on global ecosystems, agriculture, water resources and oceans. If the emitted carbon dioxide is removed and recycled, carbon resources can be utilized and environmental pollution caused by industrial waste gas emissions can be controlled. [0003] In the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/18C01B31/20C01B3/52C01C1/04C01B32/50
CPCY02P20/151
Inventor 刘有智申红艳焦纬洲祁贵生袁志国栗秀萍侯晓婷
Owner ZHONGBEI UNIV
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