Special annealing kiln for producing float glass

Abstract

The invention relates to a special annealing kiln for producing float glass. The special annealing kiln comprises a kiln body, wherein an inlet for the float glass to enter is formed in one side of the kiln body; a plurality of upper heat insulation boards are fixedly arranged inside the kiln body; the upper part of the kiln body is divided into a plurality of upper annealing regions by the upperheat insulation boards; lower heat insulation boards are arranged under the upper heat insulation boards; the lower part of the kiln body is divided into a plurality of lower annealing regions by thelower heat insulation boards; a wind screen mechanism is arranged outside the inlet; an upper cooling mechanism is arranged in each upper annealing region; a lower cooling mechanism is arranged in each lower annealing region. According to the special annealing kiln for producing the float glass, a wind curtain wall is formed by the wind screen mechanism arranged on the outer side of the inlet of the kiln body and is used for stopping external heat from entering the annealing kiln, so that the annealing effect is ensured, the operation is facilitated and the influence on continuous production of the float glass is avoided; by matching the upper cooling mechanisms with the lower cooling mechanisms, temperature difference between the side part and the middle part of the float glass is reduced, and the annealed float glass is not easy to bend.

Description

technical field [0001] The invention relates to a special annealing kiln for float glass production, which belongs to the technical field of float glass production. Background technique [0002] The forming process of float glass production is completed in a tin bath with protective gas. The molten glass flows continuously from the tank kiln and floats on the surface of the tin liquid with high relative density. Under the action of gravity and surface tension, the glass liquid spreads and flattens on the tin liquid surface to form a flat upper and lower surface, hardens and cools Afterwards, it is led to the transition roller table. The rollers of the roller table rotate, and the glass ribbon is pulled out of the tin bath and enters the annealing kiln. After annealing and cutting, the float glass product is obtained. [0003] At present, in the production process of float glass, the annealing kiln is an important equipment connecting the tin bath forming and glass cold end...

AI Technical Summary

Problems solved by technology

[0004] The current float glass annealing kiln has the following defects: 1) The glass plate coming out of the tin bath enters the annealing kiln through the entrance of the annealing kiln for annealing operation. At present, in order to prevent the high temperature heat in the tin bath from interfering For annealing operation, a curtain is usually installed at the entrance of the annealing kiln. The said curtain is made of heat insulation boards. The function of the curtain is to prevent the huge heat from entering the annealing kiln, so that the outside air is separated from the air in the kiln.

Usually, the cooling water pipes installed above or below the glass plate are used to control the temperature of each area inside the annealing kiln, and the temperature of each area inside the annealing kiln is controlled by controlling the initial water temperature, flow rate, flow rate and other parameters of the cooling water inside the cooling water pipe at different positions; but , when producing some thicker float glass, because the thickness of the float glass is thicker, and the thermal conductivity of the float glass itself is low, when this makes the float glass carry out annealing in this annealing kiln, the said cooling The water pipe is a straight structure, and the temperature difference around the cooling water pipe generally does not exceed 2°C, and the thicker float glass plate has a slower heat dissipation in the middle part, and the temperature difference between the temperature of the middle part and the edge is even It can reach above 22°C, which will easily cause compressive stress on the surface of the float glass and tensile stress on the inside, which will easily cause the float glass to bend and affect the production quality of the float glass

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