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High handling capacity nitrogen purifying device and method for ferrous metallurgy industry

A technology for iron and steel metallurgy and purification equipment, which is used in the field of protective gas for production in iron and steel metallurgy industry, and large-capacity nitrogen purification equipment in iron and steel metallurgy industry. Quality stability and other issues, to achieve the effect of saving regeneration gas, high regeneration temperature, and solving potential safety hazards

Inactive Publication Date: 2017-11-03
DALIAN ZHONGDING CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to make up for the deficiencies in the prior art, the present invention provides a large-capacity nitrogen purification device and method in the iron and steel metallurgy industry, which can control the excessive hydrogen content in nitrogen, and at the same time remove the remaining impurities O 2 、H 2 O.CO 2 Equal depth removal, which solves the problem that gas impurities affect the quality stability of steel industry products and cause the quality of cold-rolled steel sheets, galvanized steel sheets and other products to decline

Method used

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  • High handling capacity nitrogen purifying device and method for ferrous metallurgy industry
  • High handling capacity nitrogen purifying device and method for ferrous metallurgy industry
  • High handling capacity nitrogen purifying device and method for ferrous metallurgy industry

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Effect test

Embodiment 1

[0053] Embodiment 1 two tower adsorption

[0054] Such as figure 1 As shown, the raw material nitrogen enters the catalytic deoxygenator 11 after being detected by the raw material gas inlet 17, the inlet valve, the flow meter and the inlet gas analyzer. Under normal temperature conditions, the oxygen is converted into water through the catalytic action of the catalyst, and then enters the deoxidation dryer A12 through the outlet valve, and the residual O is removed under the action of the deoxidizer. 2 、H 2 O.CO 2 and other impurities, when the deoxygenation dryer A12 works as a reactor, the deoxygenation dryer B13 is regenerated. Each deoxygenation adsorber goes through the same procedure of steps. Controlling the hydrogenation process can ensure that the added hydrogen can meet the deoxidation requirements, and hydrogenation is not excessive.

[0055] Calculation of hydrogenation amount: through the detected raw material gas flow rate and raw material oxygen content, t...

Embodiment 2 3

[0109] Example 2 Three-tower adsorption

[0110] Such as figure 2 As shown, the raw material nitrogen enters the catalytic deoxygenator 201 after being detected by the raw material gas inlet 212, the inlet valve, the flow meter and the inlet gas analyzer. Under normal temperature conditions, through the catalytic action of the catalyst, the oxygen is converted into water and removed, and then through the gas-water separator, through the outlet valve, it enters the deoxygenation dryer A202 and the deoxygenation dryer B203 to remove the residual Oxygen under the action of the deoxidizer. 2 、H 2 O.CO 2 and other impurities, when the deoxygenation dryer A202 and the deoxygenation dryer B203 in series work as reactors, the deoxygenation dryer C204 is regenerated. Each deoxygenation adsorber goes through the same procedure of steps. Three deoxidizing dryers work and regenerate alternately to realize the continuous purification of raw nitrogen. In order to ensure the continuous...

Embodiment 3 4

[0115] Example 3 Four-tower adsorption

[0116] Such as image 3 As shown, the raw material nitrogen enters the catalytic deoxygenator 302 after being detected by the raw material gas inlet 315, the inlet valve, the flow meter and the inlet gas analyzer. Under normal temperature conditions, the oxygen is converted into water through the catalytic action of the catalyst to remove, and then through the gas-water separator, through the outlet valve, it enters the deoxygenation dryer A305 and the deoxygenation dryer B306 to remove the residual Oxygen under the action of the deoxidizer. 2 、H 2 O.CO 2 and other impurities, when the two-tower deoxygenation dryer A305 and deoxygenation dryer B306 work as reactors in series, the deoxygenation dryer C307 and deoxygenation dryer D308 are regenerated. Each deoxygenation adsorber goes through the same procedure of steps. The four deoxidizing dryers are divided into two groups, and the two groups work and regenerate alternately to reali...

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Abstract

The invention relates to the fields of large-scale cold rolling, silicon steel, galvanized wire production and the like in Chinese ferrous metallurgy industry and specifically relates to a high handling capacity nitrogen purifying device and method for the ferrous metallurgy industry. The high handling capacity nitrogen purifying device is mainly characterized by comprising a mechanical device and a control system; the mechanical device comprises a raw material gas inlet, a gas-water separator, an inlet trace oxygen analyzer, a mass flow controller, a program-control valve, catalytic deoxygenators, two deoxidation dryers or more, a valve water cooler, a product gas outlet and a hydrogen inlet which are communicated with each other. According to the high handling capacity nitrogen purifying device disclosed by the invention, hydrogen content exceeding standard in nitrogen is controlled; meanwhile, other impurities of O2, H2O, CO2 and the like are deeply removed; thus, the problem that gas impurities affect iron and steel industry product quality stability to cause quality declining of products of cold rolled steel plates, galvanized steel plates and the like is solved.

Description

technical field [0001] The invention belongs to the fields of large-scale cold rolling, silicon steel, and galvanizing line production in the domestic iron and steel metallurgy industry, and specifically relates to protective gas for production in the iron and steel metallurgy industry, and more specifically, a large-capacity nitrogen purification device and method in the iron and steel metallurgy industry . Background technique [0002] At present, the most common technology used in the purification of nitrogen for iron and steel production in my country is the front-end hydrodeoxidation and the back-end drying and dehydration. A certain amount of reaction water will be produced during the deoxygenation process of this technology. At the same time, since the hydrogenation operation is used in the catalytic deoxidation, the deoxygenation effect is completely dependent on the amount of hydrogen added, so the hydrogenation must be excessive, resulting in a serious excess of hy...

Claims

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Application Information

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IPC IPC(8): C01B21/04
CPCC01B21/0416C01B21/045C01B2210/0004C01B2210/0014C01B2210/0045C01B2210/0051C01B2210/0062
Inventor 乐昀朱玉秋赵霖高嵩邱长春刘皖南郑晨达
Owner DALIAN ZHONGDING CHEM
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