Float glass defoaming process

A float glass and defoaming technology, which is applied in glass furnace equipment, glass manufacturing equipment, manufacturing tools, etc., can solve the problems of large pollution emissions and high energy consumption, and achieve the effects of environmental protection, good purification effect, and reduced SO2 content

Inactive Publication Date: 2018-04-13
CSG HOLDING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of high energy consumption or large pollution discharge in the method of eliminating air bubbles in the float glass production process existing in the prior art, and to provide a float glass degassing process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Degassing of float glass

[0027] Such as figure 1 In the float glass preparation process shown in the figure, 1000kg of material is weighed according to the proportion of raw materials for float glass production, and 7kg of compound clarifying agent is added. Among them, Glauber's salt 5kg and sodium nitrate 2kg. Feed the prepared float glass raw material into the kiln, gradually heat up to 1450°C, and melt it into molten glass. After the molten glass is melted and clarified, the original pieces of float glass of various specifications are manufactured according to the conventional process. For the exhaust gas produced in the process of preparing float glass, the exhaust gas is sent to the SCR denitrification system to increase NH 3 Injecting 1 cubic meter per hour, reducing NOx to harmless N 2 and H 2 O. Sampling, monitoring and analysis of the tail gas discharged from the kiln showed that the SO in the flue gas 2 The content is 210-240ppm, and the nitrogen ox...

Embodiment 2

[0030] Degassing of float glass

[0031] Weigh 1000kg of material according to the mixing ratio of raw materials for float glass production, and add 7kg of composite clarifying agent. Among them, Glauber's salt 2kg and sodium nitrate 5kg. Feed the prepared float glass raw material into the kiln, gradually heat up to 1450°C, and melt it into molten glass. After the molten glass is melted and clarified, the original pieces of float glass of various specifications are manufactured according to the conventional process. For the tail gas produced in the process of preparing float glass, the tail gas is transported to the SCR denitrification system, the SCR denitrification system is the same as in Example 1, and the NH 3 The injection volume is 2.5 cubic meters per hour, reducing NOx to harmless N 2 and H 2O. Sampling, monitoring and analysis of the tail gas discharged from the kiln showed that the SO in the flue gas 2 Content of 90-130ppm, nitrogen oxide content of 320-400 p...

Embodiment 3

[0036] Degassing of float glass

[0037] Weigh 1000kg of material according to the mixing ratio of raw materials for float glass production, and add 7kg of composite clarifying agent. Among them, Glauber's salt 3.5kg and sodium nitrate 3.5kg. Feed the prepared float glass raw material into the kiln, gradually heat up to 1450°C, and melt it into molten glass. After the molten glass is melted and clarified, the original pieces of float glass of various specifications are manufactured according to the conventional process. For the tail gas produced in the process of preparing float glass, the tail gas is transported to the SCR denitrification system, the SCR denitrification system is the same as in Example 1, and the NH 3 The injection volume is 1.5 cubic meters per hour, reducing NOx to harmless N 2 and H 2 O. Sampling, monitoring and analysis of the tail gas discharged from the kiln showed that the SO in the flue gas 2 Content of 170~210ppm, nitrogen oxide content of 320...

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Abstract

The invention discloses a float glass defoaming process which includes the steps: (1) float glass raw material preparation: matching raw materials for preparing float glass according to proportions, and adding compound clarifying agents; (2) float glass preparation: heating and melting the raw materials prepared in the step 1 to prepare the float glass; (3) tail gas purification: purifying tail gas generated in the preparing process of the float glass by a SCR (selective catalytic reduction) denitration system, and discharging the purified tail gas. The compound clarifying agents account for 0.3-1.2% of the weight of the raw materials and comprise mirabilite and nitrate, and the weight percent of the mirabilite to the nitrate is 10-50%:90-50%. According to float glass defoaming process, micro-bubbles in glass liquid are eliminated by the aid of the compound clarifying agents, two clarifying agents are mutually cooperated, bubble removal efficiency is improved, and comprehensive discharge of air pollutants is reduced, so that flue gas discharged in float glass production meets environmental protection standards.

Description

technical field [0001] The invention relates to a glass production process, in particular to a float glass defoaming process, and belongs to the technical field of float glass production. In particular, it involves the application of compound clarifiers to optimize the degassing process of float glass and reduce the emission of pollutants in tail gas. Background technique [0002] During the production of float glass, the material needs to be completely melted and leveled to obtain a flat glass substrate. During the process of heating and melting float glass, it is usually necessary to purify the glass to remove impurities. At the same time, float glass will retain air bubbles due to various reasons in the raw materials or the preparation process. Tiny air bubbles in float glass are one of the most important defects affecting the quality of glass. [0003] In the existing process, high melting furnace temperature is used to improve the fluidity of materials and eliminate a...

Claims

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Application Information

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IPC IPC(8): C03C1/00C03B5/225B01D53/86B01D53/90
CPCB01D53/8631B01D53/90B01D2258/0241C03B5/225C03C1/004Y02A50/20
Inventor 贺有乐高建军杨占印赵奎胡玉建邹勇
Owner CSG HOLDING
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