Intelligent natural gas odorization control device and method

Abstract

The invention discloses an intelligent natural gas odorization control device and method. The intelligent natural gas odorization control device comprises an odorization machine, an odorization machine online detector, a predicting auto-disturbance rejection controller, a compensation executing mechanism and a natural gas flow detector. The predicting auto-disturbance rejection controller determines a set value of the concentration of an odorant according to a natural gas flow value of a natural gas pipeline, a set value signal is sent to the odorization machine to control the concentration ofthe odorant, according to a concentration value of the odorant, measured by the odorization machine online detector, the predicting auto-disturbance rejection controller compensates the concentrationof the odorant according to a control method combining an auto-disturbance rejection technology and a Smith compensator, a compensation signal is sent to the compensation executing mechanism, and thecompensation dosage of the odorant output by the odorization machine is controlled. According to the intelligent natural gas odorization control method, the attenuation of the concentration, the nondeterminacy in the system and the external temperature disturbance can be considered, and it is ensured that the practical concentration of the odorant of the tail end of a natural gas pipeline networkis accurately controlled in real time.

Description

technical field [0001] The invention relates to a method for controlling the concentration of a natural gas odorant, in particular to an intelligent natural gas odorizing control device and control method. Background technique [0002] Odorization is an essential part of the natural gas industry. Odorant is an organic compound or mixture with a strong odor, which is characterized by sulfur content, low toxicity, flammability, explosion, and high price. When added to the gas at a very low concentration, the gas has a special, unpleasant warning odor, so that the leaked gas can be detected when it reaches 5% of its lower explosion limit or reaches the harmful concentration allowed to the human body. . However, if the amount of odorization is insufficient, it may cause gas leakage and fail to play a safety warning role, thereby causing safety accidents. In addition, if the amount of odorization is too large, the expensive odorant will cause economic losses, and the excessive...

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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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