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

A technology of fugitive emission and electrolysis workshop, applied in measurement devices, measurement capacity, liquid/fluid solid measurement, etc., can solve the problems of inability to control HF, great influence of the surrounding environment, and inability to monitor HF in real time, and achieve accurate and reliable test results. Effect

CN113655029APending Publication Date: 2021-11-16SHENYANG BOYU TECH +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2021-11-16

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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.
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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...

Examples

Embodiment Construction

[0017] The following clearly and completely describes the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

[0018] The invention discloses an online monitoring and measuring method for fugitive emission of HF from skylights in an electrolysis workshop. The HF concentration at the throat of the skylight ventilator is tested by the HF online monitoring equipment, the wind speed at the throat of the skylight ventilator is measured by an anemometer, and the smoke at the throat of the skylight ventilator is measured by a thermometer. The air temperature is used to calculate the HF concentration C emitted from the skylight under standard conditions 标 =CTP ...