A kind of natural gas intelligent odorization control device and control method

Abstract

The invention discloses a natural gas intelligent odorizing control device and a control method. The device comprises: an odorizing machine, an odorant online detector, a predictive active disturbance rejection controller, a compensation actuator and a natural gas flow detector; The disturbance controller determines the set value of the odorant concentration according to the natural gas flow value of the natural gas pipeline, sends the set value signal to the odorant machine to control the odorant concentration, and determines the odorant concentration according to the odorant online detector. The odorant concentration value is determined by the predictive active disturbance rejection controller according to the control method combining the active disturbance rejection technology and the Smith compensator to compensate the odorant concentration, and sends the compensation signal to the compensation actuator to control the odorizer to output the odorant. amount of compensation. The control method of the invention can take into account the attenuation of the concentration, the uncertainty inside the system and the external temperature interference, so as to ensure the real-time accurate control of the actual odorant concentration at the end of the natural gas pipeline network.

Description

technical field [0001] The invention relates to a method for controlling the concentration of a natural gas odorant, in particular to a natural gas intelligent odorization control device and a control method. Background technique [0002] In the natural gas industry, odorization is an essential part. Odorants are organic compounds or mixtures with strong odor, which are sulfur-containing, low-toxic, flammable, explosive, and expensive. When added to the gas at a very low concentration, the gas has a special and unpleasant warning odor, so that the leaked gas can be detected when it reaches 5% of its lower explosion limit or reaches a harmful concentration allowed to the human body. . However, if the amount of odor is insufficient, it may lead to gas leakage without playing a role as a safety warning, thus causing a safety accident. In addition, if the amount of odorant is too large, the odorant is expensive, resulting in economic losses, and the excess odorant will produc...

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Problems solved by technology

[0006] The object of the present invention is to provide a natural gas intelligent odorization control device and control method, which solves the problem that the existing method does not consider the attenuation of odorant concentration, and can consider the attenuation of concentration and the uncertainty inside the system and external factors. Temperature interference to ensure real-time and precise control of the actual odorant concentration at the end of the natural gas pipeline network

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