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Absorption tower for producing enriched oxygen through vacuum pressure swing absorption

A technology of vacuum pressure swing adsorption and adsorption tower, which is applied in the chemical industry and can solve the problems of insufficient use of adsorbents

Active Publication Date: 2013-11-20
都江堰清天新材料技术有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide an oxygen-enriched adsorption tower produced by pressure swing adsorption, so as to solve the problem of insufficient utilization of the adsorbent in the prior art due to the change of the gas flow rate and the wear of the adsorbent.

Method used

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  • Absorption tower for producing enriched oxygen through vacuum pressure swing absorption
  • Absorption tower for producing enriched oxygen through vacuum pressure swing absorption
  • Absorption tower for producing enriched oxygen through vacuum pressure swing absorption

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] In this example, the thickness of the adsorbent bed is set to 300 millimeters (mm), the purity of the product gas is designed to be 90%, and the yield is 50%. Keep the gas flow rate in the adsorption tower basically the same, the diameter of the tower bottom is 140mm, then the diameter of the tower top can be calculated as 48.0mm. The included angle at the bottom of the adsorption tower is 81.3°. The effective volume of the adsorbent filled in the adsorption tower is 2240 milliliters (ml).

[0034] use as Figure 4 The shown double-tower VPSA laboratory device uses conical towers and axial towers for comparative experiments. Molecular sieve adsorbents use the same weight. The comparative experimental conditions are shown in the table below:

[0035]

[0036] VPSA device timing table:

[0037]

[0038] VPSA installation and electromagnetic program-controlled valve switch table:

[0039]

[0040] In the table: A: Adsorption; ED1: Equalizing and depressurizi...

Embodiment 2

[0047] In this embodiment, the calculation method of the included angle of the conical tower is as follows: firstly, the thickness of the adsorbent bed is set to 300mm, the purity of the product gas is designed to be 75%, and the yield is 60%. Keep the gas flow rate in the adsorption tower basically the same, and the diameter at the bottom of the tower is 140 mm, then the diameter at the top of the tower can be calculated as 57.0 mm. The included angle at the bottom of the adsorption tower is 82.1°. The effective volume of the adsorbent filled in the adsorption tower is 2430 ml.

[0048] Using the same method as in Example 1, only the oxygen concentration was controlled at about 75%, and the oxygen production conditions of the conical tower and the axial tower VPSA were compared.

[0049]

[0050]

[0051] The experimental results of axial tower and conical tower are shown in the table below:

[0052]

[0053] From the experimental results, it can be seen that the oxy...

Embodiment 3

[0056] In this embodiment, the calculation method of the included angle of the conical tower is as follows: firstly, the thickness of the adsorbent bed is set to 300mm, the purity of the product gas is designed to be 70%, and the yield is 65%. Keep the gas flow rate in the adsorption tower basically the same, the diameter of the bottom of the tower is 140 mm, then the diameter of the top of the tower can be calculated as 67.0 mm. The included angle at the bottom of the adsorption tower is 83.1°. The effective volume of the adsorbent filled in the adsorption tower is 2620 ml.

[0057] Using the same method as in Example 1, only the oxygen concentration was controlled at about 60%, and the oxygen production conditions of the conical tower and the axial tower VPSA were compared.

[0058]

[0059] The experimental results of axial tower and conical tower are shown in the table below:

[0060]

[0061] From the experimental results, it can be seen that the oxygen production o...

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Abstract

The present invention discloses an absorption tower for producing enriched oxygen through vacuum pressure swing absorption. The absorption tower comprises a material inlet, a raw material gas inlet, a product gas outlet, an upper screen plate and a lower screen plate, wherein the absorption tower presents a tapered shape from big to small according to a direction from the gas inlet end to the gas production end. According to the novel absorption tower, the existing radial and axial absorption tower is changed into the tapered structure, such that it is ensured that the gas stream from the gas inlet end to the gas production end always maintains a uniform and consistent flow rate, an utilization rate of a molecular sieve in the absorption tower is increased, a yield per unit of the absorption agent is increased, and equipment efficiency is high.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to an oxygen-enriched adsorption tower made by vacuum pressure swing adsorption. [0002] Background technique [0003] Oxygen enrichment by vacuum pressure swing adsorption (VPSA), as a chemical unit technology, has been widely used in air separation to produce oxygen enrichment. With the development of pressure swing adsorption technology and the enlargement of equipment, higher requirements are put forward for the adsorption tower itself, which requires the adsorption capacity of the adsorbent to be large, the adsorption and desorption rate to be fast, and the utilization rate of the adsorbent to be high. At the same time, with the development of the national economy and the strengthening of the country's environmental protection, vacuum pressure swing adsorption can effectively save energy and reduce emissions, so it will be more widely used in smelting oxygen-enriched combusti...

Claims

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Application Information

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IPC IPC(8): B01D53/047C01B13/02
Inventor 蒋兆华戴宇苏为民李东林
Owner 都江堰清天新材料技术有限责任公司
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