Vacuum degassing device of glass melt

Abstract

A vacuum degassing apparatus for molten glass, comprising: a vacuum housing which is evacuated to be depressurized therein; a vacuum degassing vessel which is provided in the vacuum housing to vacuum-degas molten glass; an uprising pipe which connects to the vacuum degassing vessel, and sucks and draws up undegassed molten glass to introduce the undegassed molten glass into the vacuum degassing vessel; and a downfalling pipe which connects to the vacuum degassing vessel and draws down the degassed molten glass from the vacuum degassing vessel to discharge the degassed molten glass; wherein said vacuum housing has an accommodating portion to accommodate said uprising pipe and an accommodating portion to accommodate said downfalling pipe, at least one of which is divided horizontally into a plurality of sections, to form a plurality of divided rooms juxtaposed in the vertical direction, and the respective divided rooms are provided with pressure control means to control the pressures of the respective divided rooms independently.

Description

technical field [0001] The present invention relates to a vacuum degassing device for glass melt, which can remove air bubbles in continuously supplied glass melt. Background technique [0002] In order to improve the quality of shaped glass products, a vacuum degassing device that can remove the bubbles generated in the glass melt before the glass melt melted in the melting tank is formed by the forming device has been proposed. [0003] image 3 The vacuum degassing device 110 shown is used in the process of vacuum degassing the glass melt in the melting tank 120, and then continuously supplying it to the subsequent processing tank. The vacuum degassing apparatus 110 includes a vacuum degassing tank 114 and an ascending pipe 116 and a descending pipe 118, both of which are connected to respective end portions of the vacuum degassing tank 114 in a vertical direction. The vacuum degassing tank 114, the riser 116 and the downcomer 118 are housed in the vacuum housing 112 tha...

AI Technical Summary

Problems solved by technology

But even with denser refractory bricks used as refractory bricks for these parts, there is still the problem of glass melt leaking through the gaps in the joints, dissolving and eroding the insulating material behind the supporting refractory bricks or dense refractory bricks, so that Brick components in the glass melt will reduce the quality of the product

Moreover, especially in the vacuum degasser 110, due to the internal decompression of the vacuum housing 112, the leakage of the glass melt will be significant, and the supporting refractory bricks or heat insulating materials will be eroded by the glass melt, and the vacuum degasser will be shortened. own service life

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