Water leakage detection device and water leakage searching method for heat exchanger in annealing furnace

Abstract

The invention discloses a water leakage detection device and a water leakage searching method for a heat exchanger in an annealing furnace, and belongs to the technical field of cold rolling continuous annealing furnaces. The water leakage detection device comprises a water-cooled heat exchanger and a dew point detector, wherein the water-cooled heat exchanger is installed at the air outlet of a hearth, a cooling fan is installed at the air inlet of the hearth, the water-cooled heat exchanger is communicated with the cooling fan through a cooling pipeline, and the dew point detector is mountedat the outlet of the water-cooled heat exchanger. According to the water leakage searching method, the power of the cooling fan is manually controlled while the position of the water-leaking water-cooled heat exchanger is determined by observing the trend of the dew point value and the plate surface phenomenon of the strip steel, the accuracy of the detected dew point can be further improved through the detection device in combination with a searching method, and the position of the water-leaking heat exchanger can be accurately and rapidly found through feedback of the dew point detector.

Description

technical field [0001] The invention relates to the technical field of cold-rolled continuous annealing furnaces, and more specifically relates to a water leakage detection device and a water leakage search method for a heat exchanger in an annealing furnace. Background technique [0002] The heat exchanger in the cooling section of the vertical continuous annealing furnace for cold rolling is a water / gas heat exchanger. The nitrogen and hydrogen protection gas in the furnace is controlled by a circulating fan, cooled by a water-cooled heat exchanger, and then sprayed onto the steel strip for circulation and cooling. Due to the high ambient temperature and large temperature changes in the annealing furnace, water leakage often occurs in the cooling heat exchanger after long-term operation. There are 28 sets of water / The number of gas heat exchangers is large, and the heat exchangers are installed in the furnace, and the shell is covered with thermal insulation cotton. [0...

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Problems solved by technology

[0006] Aiming at the existing problems of inaccurate detection values ​​and too long detection time due to sensitive changes in dew point, the present invention designs a water leakage detection device and a water leakage detection method for heat exchangers in annealing furnaces. The dew point detector is installed in the heat exchange At the outlet of the heat exchanger, the dew point of the gas coming out from the outlet of the heat exchanger can be directly detected, and the detection time is short, which can greatly improve the accuracy of the detected dew point, and through the search method in the present invention, the detection can be further improved. The accuracy of the dew point can accurately and quickly find the position of the leaking heat exchanger

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