Fixed bed reactor gas phase residence time distribution measuring system and method

Abstract

The invention discloses a fixed bed reactor gas phase residence time distribution measuring system and method. The system comprises a gas mass flow meter which is used for detecting the mass value andthe flow value of gas entering a fixed bed reactor in real time, a pressure sensor which is used for detecting pressure change electrical signals on both sides of the inlet / outlet of the fixed bed reactor in real time, a data collector which is used for collecting digital signals corresponding to the pressure change electrical signals at set sampling frequency, and a data calculation unit which is used for acquiring a gas phase residence time distribution curve corresponding to fluid in the fixed bed reactor based on each digital signal. According to the invention, the disadvantages that massspectrometry has high cost and complex operation, response time is too long, precision is not enough and the concentration change of a tracer cannot be truly reflected in an RTD determination methodare solved.

Description

technical field [0001] The invention belongs to the technical field of chemical engineering, and in particular relates to a fixed-bed reactor gas-phase residence time distribution measurement system and method. Background technique [0002] The residence time distribution (RTD) is one of the important parameters of the performance of continuous operation reaction or separation equipment; the see time experienced by the fluid micelles from entering the equipment to leaving the equipment is called the residence time, but due to the uneven flow velocity distribution of the fluid in the equipment Factors such as the diffusion of the fluid and the dead zone in the equipment cause the residence time of each fluid microgroup in the equipment to be different, thus forming the residence time distribution. [0003] At present, the method used for RTD determination is mainly the tracer response method, that is, the tracer is placed in a certain way at the entrance of the equipment, and...

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Problems solved by technology

However, this method has high requirements for the response time and accuracy of the concentration detection device, especially for gas phase fluids. The current concentration detectors are either too expensive for on-line concentration detection, and the operation is complicated, such as mass spectrometry, or the response time is too long and the accuracy is not enough. , cannot truly reflect the concentration change of the tracer

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