Intelligent control and diagnosis system and method for oxygen content of diffused gas at top of coking tank

Abstract

The invention provides a coking tank top diffused gas oxygen content intelligent control diagnosis system and method, and the system comprises a tar ammonia water separation unit diffused gas pipeline, an oil depot unit diffused gas pipeline, a crude benzene unit diffused gas pipeline, a diffused gas main pipeline, and a diffused gas pipeline oxygen content measurement instrument. The outlet of the diffused gas main pipeline is connected to the gas pipeline between the electrical tar precipitator and the inlet of the air blower; and sampling points of the diffused gas pipeline oxygen content measuring instrument are respectively arranged on a diffused gas main pipeline, a diffused gas pipeline of the tar and ammonia water separation unit, a diffused gas pipeline of the oil depot unit and a diffused gas pipeline of the crude benzene unit. The mode that three branch pipes of a traditional bleeder enter the gas pipeline respectively is changed, and the tail ends of the three branch pipes of the bleeder are gathered to one bleeding gas header pipe and then enter the gas pipeline in a unified mode. The oxygen content of the main pipe of the diffused gas is monitored, so that the confluence cut-off of the diffused pipe in a certain area caused by the fluctuation of the oxygen content of a certain branch pipe of the diffused pipe is effectively avoided.

Description

technical field [0001] The invention relates to the technical field of coking gas purification production, in particular to an intelligent control and diagnosis system and method for the oxygen content of the diffused gas at the top of a coking tank. Background technique [0002] With the improvement of national environmental protection requirements and the maturity of gas purification technology in coking, there are many storage tanks in the gas purification system in the coking field for the storage of chemical products, and many chemical product raw materials have different degrees of volatility. During the production process, the storage tank is frequently loaded and discharged, resulting in pressure fluctuations in the top area of ​​the tank. If the negative pressure is severe, air will be sucked into the top area of ​​the tank, resulting in an increase in the oxygen content in the vented gas. If the positive pressure is severe, the volatilized gas will be released into...

AI Technical Summary

Problems solved by technology

The process of putting into operation is carried out under manual operation, and the cycle of putting into operation of the system is long. During the process of putting into operation, because the residual gas in the pipeline is not automatically emptied, some gas with excessive oxygen content will be discharged into the gas pipeline. ,There are security risks

In addition, this traditional solution needs to install an oxygen content online detection instrument on each discharge pipe, which increases the equipment investment and maintenance costs of the instrument.

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