Method and device for checking quantity and purity in pressure swing adsorption plants

A pressure swing adsorption and equipment technology, applied in chemical instruments and methods, separation methods, gas treatment, etc., can solve the problems of increased possibility of failure, reduced capacity, and pressure drop, and achieves continuously variable load adaptation Effect

Active Publication Date: 2017-08-01
LINDE AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The known method for limiting the amount of product flow from the product buffer has the disadvantage that a closed-loop control valve is actually required and thus, in particular, the possibility of failure increases
[0010] However, this closed-loop volume control itself brings other disadvantages:
Its disadvantage is that the interruption of the gas supply during the production phase causes a significant loss of time
Also, the pressure drops during the production steps and thus the capacity

Method used

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  • Method and device for checking quantity and purity in pressure swing adsorption plants
  • Method and device for checking quantity and purity in pressure swing adsorption plants
  • Method and device for checking quantity and purity in pressure swing adsorption plants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0091] figure 1 is a schematic diagram of a single adsorber apparatus suitable for carrying out the method according to the invention.

[0092] The pressure swing adsorption equipment 1 includes an adsorber 2, a product buffer 3, a pressure buffer 6, a quantity measuring device 4, two pressure measuring devices 5, a gas supply valve 101, a product valve 102, a discharge valve 103, and an exhaust valve 104 and purge valve 105.

[0093] The quantity measuring device 4 allows determining the quantity of product gas P withdrawn from the product buffer 3 . The pressure measuring device 5 allows the pressure in the adsorber 2 and in the product buffer 3 to be determined.

[0094] In the present case, the method has a working cycle comprising a pressure build-up phase, a production phase, a discharge phase, a regeneration phase and a charging phase, wherein an idle phase is arranged between two working cycles, that is to say Before the pressure build-up phase and after the chargin...

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PUM

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Abstract

The invention relates to a method for adapting the load and checking the quantity and purity of a pressure swing adsorption plant, wherein the pressure swing adsorption plant runs through a working cycle that comprises at least one production cycle. During the production cycle, a feed gas is fed uninterruptedly into at least one adsorber and the time at which the production cycle ends is determined by ascertaining the quantity MA(t) of the product gas removed from the at least one adsorber during the production cycle, wherein the production cycle is ended when the quantity MA(t) is greater than or equal to a prescribed quantity MDesign, and wherein the quantity MA(t) is calculated from the quantity Q(t) removed from the product buffer and the pressure profile in the product buffer. The invention also relates to a pressure swing adsorption plant for carrying out the method.

Description

technical field [0001] The invention relates to a method for load adaptation and quantity and purity monitoring of a pressure swing adsorption plant according to claim 1 and also to a device for carrying out the method according to claim 9 . Background technique [0002] Quantitative monitoring of product quantities in pressure swing adsorption plants by means of measuring devices and closed-loop control devices is known from the prior art. Here, in particular in the case of plants with a product buffer, the amount of product withdrawn from the product buffer is controlled in a closed-loop manner. The closed-loop control device can also be used simultaneously as a closed-loop pressure control means. If the withdrawn product quantity is below a predefined design quantity, the pressure is firstly controlled in a closed-loop manner, wherein then, when the design quantity is achieved, the closed-loop quantity control comes into play and prevents overrunning of the plant. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/047B01D53/053
CPCB01D53/047B01D53/0476B01D53/053B01D2256/12B01D2259/40007B01D2259/40009B01D2259/401B01D2259/402
Inventor M·格拉尔T·齐希K·维尔德格鲁贝尔
Owner LINDE AG
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