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Pressure swing adsorbent regeneration control device and control method thereof

A technology for adsorbent regeneration and regeneration control, which is applied in separation methods, filter regeneration, and overall factory control, and can solve problems such as residues, low energy consumption in the flushing process, and high requirements for the purity and adsorption of flushing media.

Active Publication Date: 2017-05-31
HENAN XINLIANXIN FERTILIZER +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adsorbent regeneration is an important process of pressure swing adsorption technology. In terms of regeneration methods, evacuation and flushing can be used. The evacuation process is completely regenerated, but the energy consumption is high; the flushing process has low energy consumption, but requires the purity and adsorption of the flushing medium. Problems such as high and some residues have brought great troubles to enterprises

Method used

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  • Pressure swing adsorbent regeneration control device and control method thereof
  • Pressure swing adsorbent regeneration control device and control method thereof
  • Pressure swing adsorbent regeneration control device and control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] The present invention adopts the nitrogen flushing regeneration method to regenerate the adsorption tower unit adsorbent regeneration, including the following steps:

[0065] Step 1: In the preparation stage for nitrogen flushing, when the nitrogen inlet pressure sensor 2 detects that the nitrogen pressure is between 0.2 and 0.4 MPa, the nitrogen inlet pressure sensor 2 will feed back the detected nitrogen pressure to the DCS database 39 and the DCS main control card 38. The model predictive controller 37, the model predictive controller 37 controls the opening of the nitrogen gas intake regulating valve 3 and the nitrogen flushing regulating valve 14 through the DCS main control card 38; the opening of the nitrogen gas intake regulating valve 3 is 80%, and the nitrogen flushing regulating valve 14 The opening is 80%, the nitrogen flow is 4000Nm 3 / h;

[0066] Step 2: Enter the nitrogen flushing stage. When the nitrogen gas intake regulating valve 3 and the nitrogen fl...

Embodiment 2

[0071] The present invention adopts the nitrogen flushing regeneration method to regenerate the adsorption tower unit adsorbent regeneration, including the following steps:

[0072] Step 1: In the preparation stage for nitrogen flushing, when the nitrogen inlet pressure sensor 2 detects that the nitrogen pressure is between 0.2 and 0.4 MPa, the nitrogen inlet pressure sensor 2 will feed back the detected nitrogen pressure to the DCS database 39 and the DCS main control card 38. The model predictive controller 37, the model predictive controller 37 controls the opening of the nitrogen gas intake regulating valve 3 and the nitrogen flushing regulating valve 14 through the DCS main control card 38; the opening of the nitrogen gas intake regulating valve 3 is 80%, and the nitrogen flushing regulating valve 14 The opening is 80%, the nitrogen flow is 4000Nm 3 / h;

[0073] Step 2: Enter the nitrogen flushing stage. When the nitrogen gas intake regulating valve 3 and the nitrogen flus...

Embodiment 3

[0080] The present invention adopts the hydrogen flushing regeneration method to regenerate the adsorption tower unit adsorbent regeneration, including the following steps:

[0081] Step 1: In the hydrogen flushing preparation stage, when the hydrogen intake pressure sensor 6 detects that the hydrogen pressure is between 0.2 and 0.4 MPa, the hydrogen intake pressure sensor 6 will feed back the detected hydrogen pressure to the DCS database 39 and the DCS main control card 38. The model predictive controller 37, the model predictive controller 37 controls the opening of the hydrogen gas intake regulating valve 7 and the hydrogen flushing regulating valve 20 through the DCS main control card 38, the opening of the hydrogen gas intake regulating valve 7 is 80%, and the hydrogen flushing regulating valve The opening degree of 20 is 80%, and the flow rate of hydrogen is 3200Nm 3 / h;

[0082] Step 2: Enter the stage of hydrogen flushing. When the hydrogen intake regulating valve 7 ...

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Abstract

The invention belongs to a pressure-swing adsorbent regeneration control device and a control method thereof. The pressure-swing adsorbent regeneration control device comprises a multi-medium air inlet device, a flushing device, an emptying device and a control system, wherein the multi-medium air inlet device comprises a nitrogen inlet, a hydrogen inlet and a qualified purified gas inlet; the flushing device comprises a nitrogen buffer tank, a hydrogen buffer tank and a qualified purified gas buffer tank; the emptying device comprises a vacuum pump and an emptying main pipe, and the vacuum pump is connected with the emptying main pipe through a pipeline; the control system comprises a model predictive controller, a DCS master control card and a DCS database. The pressure-swing adsorbent regeneration control device has the advantages of being reasonable in design, diversified in adsorbent regeneration way, high in automatic control capability, large in quantity of recycle of effective gas, high in energy conservation and emission reduction, and suitable for large scale production.

Description

technical field [0001] The invention belongs to the technical field of adsorbent regeneration, and in particular relates to a pressure swing adsorbent regeneration control device and a control method thereof. Background technique [0002] Pressure Swing Adsorption (PSA for short) is a newly emerging gas separation technology in industry in recent decades, and it is the specific application of physical and chemical percolation theory in industry. [0003] At present, pressure swing adsorption technology has formed an important industry and has been widely used in the field of gas separation and purification. In a period of time to come, pressure swing adsorption technology will still occupy a large proportion. Adsorbent regeneration is an important process of pressure swing adsorption technology. In terms of regeneration methods, evacuation and flushing can be used. The evacuation process is completely regenerated, but the energy consumption is high; the energy consumption o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/418B01D53/047B01J20/34
CPCY02P90/02
Inventor 顾朝晖徐严伟刘伟郭秀红樊安静王亚乐吕云晨杨安成
Owner HENAN XINLIANXIN FERTILIZER
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