A kind of rapid heating method of glass heating furnace

Abstract

A rapid heating method for a glass heating furnace, comprising an upper furnace body, a lower furnace body, a glass conveying roller table and a heater, a vertical wall and a confluence wall are arranged on the inner wall of the furnace, a fan is arranged outside the confluence wall, and a fan is arranged on the confluence wall There is a bellows on the inside, the fan is connected to the bellows, there is at least one blower port on the bellows, the convection box cover is set on the blower port, the heater is set on the inside or outside of the convection box cover, and the vertical wall and the confluence wall There is a deflector wall between them. When the glass is heated, the hot air blows to the surface of the glass, and the return hot air reflected from the glass surface to the furnace body passes through the deflector wall and returns to the bellows. The reheated return air flows to the glass with the heating airflow. The hot air circulation is formed to increase the circulation speed and convective heat transfer coefficient of the airflow in the heating furnace without increasing the power of the fan, so as to realize the uniform and rapid heating of the glass by the high-temperature gas. Using the method can increase the speed and uniformity of glass heating, and can save energy.

Description

technical field [0001] The invention relates to a glass heating method, in particular to a rapid heating method for a glass heating furnace. Background technique [0002] In the industrial production of glass tempering, the traditional glass heating furnace usually works in a radiation mode, that is, the infrared rays of the resistance heating element are used to heat the glass. This heating method has heating effects on some glass varieties with high reflectivity and transmittance. The problem of long time and low heating efficiency. In the production process of glass tempering, uniform heating of the glass is the most critical. Uneven heating will generate local stress concentration on the glass surface, resulting in bending deformation of the glass, and even bursting in severe cases. [0003] Later, a convection heating furnace appeared to heat glass. The heating furnace uses jet heating technology to blow high-temperature gas onto the glass surface, and complete the hea...

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Problems solved by technology

[0004] This convection heating furnace effectively solves the problems of long heating time and low heating efficiency of the traditional radiation heating method. The eddy currents appear at the corners of the side walls, which have a large retardation effect on the flow of gas. In order to increase the heating speed and temperature, it is usually necessary to increase the power and speed of the fan to achieve this, which not only causes waste of energy, but also affects The heating effect of the glass; moreover, in the existing convection heating furnace structure, the pressure loss is large when the gas flows, and the pressure of each part in the air duct is unbalanced, which is not conducive to the uniform heating of the glass

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