Online monitoring and measuring method for unorganized HF emission of skylight of electrolytic plant

Abstract

The invention relates to an online monitoring and measuring method, in particular to an online monitoring and measuring method for unorganized HF emission of a skylight of an electrolytic plant. The HF concentration at the throat of the skylight ventilator is tested through HF online monitoring equipment, the wind speed of the throat of the skylight ventilator is measured through an anemometer, the flue gas temperature of the throat of the skylight ventilator is measured through a thermometer, the concentration C of HF discharged by the skylight under standard conditions is equal to CTP / PT , and the HF discharge amount Q of the skylight in unit time is equal to C*V1*S <throat>, wherein C is the online monitoring HF concentration, V is the throat wind speed measured by the anemometer, S throat is the throat area of the skylight ventilator of the electrolytic plant, T standard is the temperature under the standard condition, P standard is the pressure under the standard condition, P is the pressure under the working condition, and T is the flue gas temperature. The method has the advantages that the concentration of the HF discharged by the skylight is measured, the influence of the wind speed and the temperature on the skylight flue gas is considered, the discharge amount of the HF can be calculated, and the test result is accurate and reliable.

Description

technical field [0001] The invention relates to an on-line monitoring and measurement method, in particular to an on-line monitoring and measurement method for the fugitive emission of HF from skylights in electrolysis workshops. Background technique [0002] The pollutants emitted by industrial aluminum electrolytic cells during the electrolysis process are mainly HF, which permeates the electrolysis workshop, deteriorating the working conditions and seriously affecting the health of production workers. The diffusion of electrolytic flue gas around the factory area will pollute the atmosphere and bring great harm to the development of agricultural and animal husbandry production and people's lives. [0003] In the production of electrolytic aluminum, 98%~99% of the electrolytic flue gas enters the electrolytic flue gas purification system through the electrolytic cell gas collection system and exhaust pipe for centralized treatment and discharges to the atmosphere after rea...

AI Technical Summary

Problems solved by technology

[0004] Although the proportion of unorganized electrolysis flue gas is very small, it is directly discharged without any treatment, which has a great impact on the surrounding environment

At present, there is no scientific and effective online monitoring method for HF fugitive emissions from electrolysis workshops, and it is impossible to monitor HF entering the atmosphere in the form of fugitive emissions in real time, and the environmental protection department cannot effectively control the HF fugitive emissions of enterprises

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