Device and Control Method for Slow Cooling Section of Radiation Cooling System of Horizontal Annealing Furnace

Abstract

An annealing furnace radiation cooling system slow cooling section device and its control method, the slow cooling section device is set to 4-8 sections, each section is respectively equipped with an air flow control valve (3) and a temperature detector , when the temperature detector detects the temperature in the furnace, the information is passed through the feedback controller (11) to adjust the air flow regulating valve; each section is arranged with radiation sleeves (2) crossed above and below the strip, through the radiation sleeve The cold air in the pipe radiates to cool the steel strip, and the flow regulating valve (3) connected to each section is connected to the exhaust fan (5) through the air pipe (4) and then discharged from the exhaust chimney (6). According to the present invention, the production process of the slow cooling section can be set according to the original target temperature. According to the actual temperature in the furnace, the gas flow in the radiation cooling pipe is automatically adjusted according to the furnace temperature requirement, and the control method is relatively simple. , strong operability and easy daily maintenance.

Description

technical field [0001] The invention relates to the field of metallurgical heat treatment annealing, in particular to a slow cooling section device of a radiation cooling system of a horizontal annealing furnace and a control method thereof in a continuous annealing production line of a cold rolling continuous unit annealing requiring slow cooling. Background technique [0002] In the heat treatment annealing process, there are generally production processes such as heating section, soaking section, slow cooling section, fast cooling section and air cooling section; the thermal drawing annealing unit of the first phase of the silicon steel department of a steel company also uses the same the above process. During the annealing process of the product, the slow cooling section plays a vital role, and the slow cooling speed has a great influence on the shape of the strip surface. The cooling method used in the slow cooling section of the first-stage thermal drawing annealing u...

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Problems solved by technology

[0004] 1) The cooling bellows are arranged on the upper and lower surfaces of the strip, and the method of purging cooling is not conducive to the uniformity of the strip during cooling, and it is also not conducive to improving the shape of the strip.

[0005] 2) The cooling method of directly purging the surface of the strip is not conducive to the relative stability of the furnace pressure of the annealing furnace. If the cooling air volume is dynamically adjusted, the atmosphere between the various sections in the furnace is easy to move in series and cannot reach the annealing furnace. Stable control of the atmosphere in each section

[0006] 3) To use air box cooling, it is necessary to configure related equipment for each air box. Each air box must be equipped with a circulating fan and a heat exchanger, which increases the investment in equipment construction and is also necessary for future maintenance and repair. very unfavorable

[0011] However, this patent is mainly used for dehumidification and prevention of condensation in factory buildings, and its structure and usage methods are not related to this topic

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