Control method and system for pressure swing adsorption device

Abstract

The invention discloses a control method for a pressure swing adsorption device. The control method for the pressure swing adsorption device comprises the following steps of: computing a reference curve of an adsorption time-raw material flow relationship according to preset reference parameters of the pressure swing adsorption device, and acquiring a control curve of the adsorption time-raw material flow relationship according to the reference curve and preset technical indexes; and acquiring real-time parameter data of the pressure swing adsorption device, computing a real-time dynamic adsorption point according to the real-time parameter data, judging whether the pressure swing adsorption device runs normally according to position relationships between the real-time dynamic adsorption point and the reference curve and between the real-time dynamic adsorption point and the control curve, and if the pressure swing adsorption device is judged to run abnormally, regulating the current adsorption time so as to restore the normal running of the pressure swing adsorption device. Correspondingly, the invention also provides a control system for the pressure swing adsorption device. The pressure swing adsorption device can be ensured to have optimal adsorption time under different working conditions, and the optimal stable running and the highest economic running performance of the pressure swing adsorption device can be ensured.

Description

technical field [0001] The invention relates to the field of gas separation, in particular to a control method and system for a pressure swing adsorption device. Background technique [0002] Pressure swing adsorption gas separation technology and devices are widely used in the field of gas separation. The product gas composition and product gas recovery rate of the pressure swing adsorption device are directly related to the operation stability and economic performance of the device, and the operation stability and economic performance of the device are both It depends on the judgment and adjustment of the adsorption time of the pressure swing adsorption device under different working conditions such as feed gas flow rate, pressure and raw material composition. The pressure swing adsorption device in the prior art lacks intuitive, dynamic and reliable calculation of adsorption time, and the dynamic display and feedback control of the operating status of the device, which wi...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a control method and system for a pressure swing adsorption device, which solves the problems caused by the lack of intuitive, dynamic and reliable adsorption time calculation in the prior art, and the dynamic display and feedback control of the device's operating status. The problem of low operating performance of the pressure swing adsorption device and low product recovery rate can ensure that the pressure swing adsorption device maintains the best adsorption time under different working conditions, and ensures the best stable operation and the highest economic performance of the pressure swing adsorption device.

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