Method and device for checking quantity and purity in a pressure swing adsorption plant

Abstract

The present invention is a method for load adaptation and quantity and purity monitoring of a pressure swing adsorption plant, wherein the pressure swing adsorption plant is operated through a working cycle, and the working cycle includes at least one production phase. During said production phase, supply gas is provided to at least one adsorber in an uninterrupted manner, and the end time of said production phase is determined by ascertaining said gas extracted from said at least one adsorber during said production phase. Amount of product gas M A (t) is determined, wherein the production stage is in the amount M A (t) is greater than or equal to a predefined amount M Design ends when, and where the amount M A (t) is calculated from the quantity Q(t) withdrawn from the product buffer and the pressure curve in the product buffer. The invention also relates to a pressure swing adsorption device for carrying out said 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 and also to a device for carrying out the method. 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 Here, in particular in the case of plants with a product buffer, the amount of product withdrawn from the product buffer is controlled in a closed-loop manner.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 If the withdrawn product quantity is below a predefined design quantity, the pressure is firstly controlled in a closed-loop manner, wherein then, when the design quantity is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. [0003] In the case of PSA (pressure swing adso...

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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

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