CN201183770Y - A glass melting furnace suitable for vacuum clarification technology - Google Patents

Abstract

The utility model discloses a glass melting furnace suitable for decompression and clarification technology. , a horizontal decompression clarification area (D2) and a descending pipe (D3), the melting pool (A) is connected to the inlet of the decompression clarification device (D) through the flow hole (B), and the outlet of the decompression clarification device (D) The end communicates with the cooling pool (C), and the top of the decompression clarification device (D) is provided with a set of vacuum pump ports (1, 2, 3, 4) and correspondingly connected vacuum pumps (10). Electric heating elements (5, 6, 7, 8) are arranged in the inlet port (D1) of the decompression clarification device to maintain the viscosity and temperature of the glass liquid. The new melting furnace has a good clarification effect, can save a large amount of energy consumed in the glass melting process, and has good versatility and operability.

Description

A glass melting furnace suitable for vacuum clarification technology

Technical field:

The utility model relates to a glass melting furnace in the field of glass manufacturing, in particular to a glass melting furnace suitable for decompression and clarification technology.

Background technique:

During the glass melting process, the pyrolysis of the batch material will generate a large amount of gas, and the batch material itself will also bring a large amount of gas, which will be introduced into the molten glass. Usually, these gases will be removed during the clarification of the molten glass. However, a small part of it will still exist in the glass liquid in the form of bubbles. If the content of bubbles is too much, it will directly affect the quality of the finished glass. Therefore, the clarification process becomes very important.

The existing melting furnace structure mainly includes the structure of the melting pool, the liquid flow hole and the cooling pool. The liquid flow hole structure has a good cooling effect and can effectively reduce the cooling area; at the same time, it can well block the scum and improve Melting rate and melting quality of glass. The forming temperature of glass is about 1350°C, but the temperature of a general glass melting furnace will be kept between 1500°C and 1600°C, and the increase of about 200°C is to make the glass liquid better clarified. Through thermal calculation, we can know that the heat required for every 1°C increase at high temperature will increase geometrically. For example, the heat required to increase the temperature of the furnace from 1599°C to 1600°C is 680kJ/m ² ·h. Based on the calculation of a 500t/d scale furnace, a 1°C increase can reduce the use of heavy oil by about 0.72 tons per day . In today's society, energy problems are becoming more and more serious, and various industries have higher and higher requirements for energy saving. Therefore, it is very important to adopt a new type of clarification device that is more energy-saving. According to the laws of physics: when the air pressure is reduced, the diameter of the bubbles in the glass melt will increase. And as the air pressure continues to decrease, the diameter of the bubbles in the glass melt will continue to increase, and the effect is best in vacuum. However, there is no ideal technical solution for how to apply the above principles to the furnace structure.

Utility model content:

The purpose of this utility model is to provide a new melting furnace structure with simple structure, good clarification effect and energy saving, which can be used together with decompression clarification technology to promote the discharge of gas in the glass liquid and reduce the impact of air bubbles on the glass liquid. The impact of quality, improve the quality of glass production,

The utility model patent adopts the following technical solutions:

A glass melting furnace suitable for decompression and clarification technology, which includes a melting pool, a liquid flow hole and a cooling pool. The inlet of the clarification device is connected, the outlet of the decompression clarification device is connected with the cooling pool, and the top of the decompression clarification device is provided with a set of vacuum pump ports and correspondingly connected vacuum pumps, and the vacuum pump ports can be symmetrically distributed.

The decompression clarification device is composed of an upward ascending pipeline, a horizontal decompression clarification area and a downward descending pipeline, and can make an arc between the ascending pipeline and the decompression clarification area as well as the descending pipeline and the decompression clarification area. shape connection. An electric heater can also be installed on the inner pool wall of the ascending pipeline.

Adopt above technical scheme, the utility model has the following advantages:

(1) In the utility model, an electric heating element is arranged in the ascending pipeline. It can ensure that the glass still has considerable viscosity during the decompression clarification process, and can pass through the decompression clarification zone smoothly. The decompression clarification zone made of refractory materials can achieve better sealing and ensure that the glass liquid is clarified in a decompression environment.

(2) In the utility model, an arc connection is adopted between the ascending pipe and the decompression clarification area as well as between the downcomer and the decompression clarification area, which can reduce the resistance when the glass liquid flows and improve the clarification quality of the glass liquid.

(3) In the utility model, symmetrically arranged vacuum pump interfaces are adopted. It can ensure that the air pressure in the entire decompression clarification area is basically kept constant, so that the glass liquid passing through the decompression clarification area can achieve a good and uniform clarification effect and ensure the quality of the glass.

(4) The melting furnace in the utility model adopts a liquid flow hole structure, which can effectively reduce the cooling area, improve the melting rate and melting quality of the glass, and is conducive to maintaining the sealing of the melting furnace.

Description of drawings

Fig. 1 is the front view structure sectional view of the utility model

Detailed ways:

Below in conjunction with accompanying drawing and example the utility model is further described:

As shown in Figure 1, the utility model is provided with a melting pool (A), a liquid flow hole (B), a decompression clarification device (D), and a cooling pool (C). The decompression clarification device (D) further includes an ascending pipeline (D1), a horizontal decompression clarification area (D2) and a descending pipeline (D3). The liquid flow hole (B) is connected to the rising pipe (D1) in the decompression clarification device. Electric heaters (5, 6, 7, 8) are provided on the riser pipe (D1). Vacuum pump ports (1, 2, 3, 4) and correspondingly connected vacuum pumps (10) are arranged on the top of the decompression clarification area, and the vacuum pump ports are arranged in pairs. The downcomer (D3) in the vacuum clarification unit is connected to the cooling pool (C) of the furnace.

The liquid flow hole (B) is provided to effectively reduce the cooling area; at the same time, it can well block the scum and improve the melting rate and melting quality of the glass. The connection between the riser (D1) and the decompression clarification zone (D2) and the downcomer (D3) and the decompression clarification zone (D2) is designed as an arc, in order to reduce the resistance of the glass liquid flow and improve the clarification of the glass. quality. Utilize the (1, 2, 3, 4) vacuum pump interfaces distributed on the top of the decompression clarification zone (D2), use an external vacuum pump to pump the upper space of the decompression clarification zone into a state lower than the standard atmospheric pressure, so that the glass liquid Bubbles can grow sufficiently in this space to be discharged from the glass liquid to achieve clarification. The electric heating element arranged in the riser (D1) is to keep the temperature of the glass liquid in the decompression clarification zone.

Working principle of the utility model:

The melted glass (11) passes through the liquid hole (B) from the melting pool (A) to the riser (D1), and is lifted into the decompression clarification area (D2) by siphon action, and then decompressed Clarification under reduced pressure in the clarification zone. During the whole process, there will be a certain temperature drop, and the temperature of the molten glass is kept in a suitable temperature range through the electric heating element arranged in the riser. The air pressure in the decompression clarification area is lower than the standard atmospheric pressure with a vacuum pump arranged outside, so that the glass liquid can be fully clarified. The clarified glass liquid enters the cooling pool through the downcomer (D3) for homogenization and cooling.

Claims (5)

1. A glass melting furnace suitable for decompression and clarification technology, which includes a melting pool (A), a flow hole (B) and a cooling pool (D), characterized in that: the melting pool (A) and the cooling pool (C) A decompression clarification device (D) is arranged between them, the melting pool (A) is connected to the inlet end of the decompression clarification device (D) through the flow hole (B), and the outlet end of the decompression clarification device (D) is connected to the cooling pool (C ), and the top of the decompression clarification device (D) is provided with a set of vacuum pump ports (1, 2, 3, 4) and correspondingly connected vacuum pumps (10). 2. A glass melting furnace suitable for decompression clarification technology according to claim 1, characterized in that: the decompression clarification device (D) consists of an upward ascending pipeline (D1), a horizontal decompression clarification area (D2) and the downward descending duct (D3). 3. A glass melting furnace suitable for decompression clarification technology according to claim 2, characterized in that: the ascending pipeline (D1) and the decompression clarification zone (D2) and the descending pipeline (D3) and the decompression clarification zone ( D2) are connected in an arc shape. 4. A glass melting furnace suitable for decompression and clarification technology according to claim 2, characterized in that electric heaters (5, 6, 7, 8) are installed on the inner tank wall of the ascending pipe (D1). 5. A glass melting furnace suitable for decompression and clarification technology according to claim 1, characterized in that: said set of vacuum pump ports (1, 2, 3, 4) are symmetrically distributed.

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