Method for detecting cleaness of furnace gas in continuous annealing furnace

Abstract

The invention relates to a method for detecting cleaness of furnace gas in a continuous annealing furnace. The method comprises the following steps: the gas in the annealing furnace is extracted by a sampling metering pump and is enabled to pass through a collector according to a given flow; various particulate matters in the gas are intercepted in the collector; the volume of the collected furnace gas can be automatically measured by the sampling metering pump, and temperature and pressure signals, which are measured by an instrument at the front of the sampling metering pump, are transmitted to a computer for processing by a controller so that the volume unit of the furnace gas is converted as standard cubic meter; the total weight of suspended particulate matters in a sampling furnace region is obtained according to the weight difference of pollutant gross collector filter cores before and after sampling, so that the concentration of the particulate matters in the furnace gas can be solved; and the pollution degree in the furnace is evaluated through detection of the cleaness and total gross of the furnace gas in various furnace regions, and whether noxious substances in various regions are abnormal can be judged through detection and analysis of furnace gas constituents in the various furnace regions. By using the method, the pollutants in the furnace can be correctly and timely detected, and reference basis is provided for improving product quality, reasonably arranging furnace shut down for overhauling and cleaning the furnace.

Description

technical field [0001] The invention relates to the technical field of heat treatment of cold-rolled metal strips, in particular to a method for detecting gas cleanliness in a continuous annealing furnace, which is used in the production fields of medium and high-end automobiles and home appliance panels. Background technique [0002] With the increasing demand for high surface quality products in the automobile and home appliance industries, the requirements for product surface quality are becoming more and more stringent, which promotes the development of new technologies for continuous galvanizing and continuous annealing production lines. However, the continuous annealing furnace as the core equipment is subject to high temperature, Affected by factors such as airtightness, some key issues that restrict the improvement of product quality have not been broken through. The detection of the cleanliness of the gas in the furnace under the production state of the continuous an...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a fast and reliable detection method for gas pollutants in continuous annealing furnaces in order to reasonably determine the production process and improve the quality of products such as mid-to-high-end automobiles and home appliance panels

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