Early warning method and device for online monitoring data of tail gas pollutants in refining devices

Abstract

The invention discloses an early warning method and a device for online monitoring data of tail gas pollutants in refining devices. The method comprises the steps of: acquiring online monitoring dataof tail gas pollutants in a discharge port of a refining device, wherein the online monitoring data comprises an flue gas oxygen content monitoring value and a flue gas nitrogen oxide concentration monitoring value; determining a change law of the flue gas nitrogen oxide concentration monitoring value according to the flue gas oxygen content monitoring value and the flue gas nitrogen oxide concentration monitoring value; and carrying out early warning according to the change law of the flue gas nitrogen oxide concentration monitoring value and a discharge limit value of flue gas nitrogen oxide. According to the method and device, the possibility of standard exceeding of pollutants is rapidly predicted according to online monitoring data of tail gas pollutants in the discharge ports of refining devices, so that a large amount of time is prevented from being consumed by analyzing influences, on pollutant monitoring, of pollutant diffusion processes and the pollutant distribution conditions, and the analysis and operation processes are simplified on the basis of ensuring correct early warning, thereby carrying out timely early warning before the pollutant discharge of the refining deices exceeds the standard.

Description

technical field [0001] The invention relates to the field of petroleum and petrochemical environmental protection technologies, in particular to a method and device for on-line monitoring data early warning of tail gas pollutants of refining and chemical equipment. Background technique [0002] Air pollutant emissions in the refining and chemical industry have been widely concerned by the government and all walks of life. The emission sources of sulfur oxides and nitrogen oxides in the production process of the refinery mainly include: catalytic cracking catalyst regeneration flue gas; acid gas recovery unit tail gas; process heating furnace flue gas, etc. Taking the catalytic cracking unit as an example, the GB31570-2015 "Petroleum Refining Industry Pollutant Discharge Standard" promulgated in 2015 set the emission concentration limits of sulfur dioxide and nitrogen oxides in the tail gas of the catalytic cracking unit from 700mg / m 3 , 420mg / m 3 ("Comprehensive Emission S...

AI Technical Summary

Problems solved by technology

The above models all involve the diffusion process of water quality or air pollution and the distribution of pollutants. They all take into account the influence of the diffusion process of water quality or air pollution and the distribution of pollutants on the monitoring of water quality or air pollutants. These methods are used to monitor water quality or air pollutants. The accuracy of the early warning is high, but the analysis and calculation process of the impact of the pollution diffusion process and the distribution of pollutants on the monitoring of pollutants is very complicated and takes a lot of time, and it is impossible to realize the rapid early warning of pollutants

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