Pressure relief device of glass melting furnace

Abstract

The utility model belongs to the technical field of glass production and manufacturing processes, and particularly relates to a pressure relief device of a glass melting furnace, which comprises a pressure relief body, a dilution air inlet is formed in a breast wall of the working part of the glass melting furnace, and pressure relief holes are formed in a front end wall and a rear gable wall of the working part of the glass melting furnace; the pressure relief body is a cylinder with two open ends, an air inlet is arranged in the middle of the cylinder, the pressure relief hole is communicated with the air inlet, and the height of the cylinder is 1000-1500mm. The beneficial effects of the utility model lie in that the dilution air inlets and the pressure relief holes on each side of the breast walls on two sides of the working part are all changed into dilution air inlets, the pressure relief holes are arranged at the upper parts of the front end wall and the rear gable wall of the working part, and the barrel body which is unblocked up and down is fitted, so that hot air can be exhausted and radiated through the upper opening of the barrel body; and exhaust and heat dissipation can be realized through the lower opening. The pressure relief hole can dissipate heat and relieve pressure, dust is prevented from being blown into the working part along with airflow to pollute glass and generate stones and bubbles, and scientificity and reasonability are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of glass production and manufacturing technology, and particularly relates to a pressure relief device for a glass melting furnace. Background Art

[0002] The cooling section of a flat glass furnace, also known as the working section, is a crucial thermal engineering device for regulating the temperature of the molten glass. The working section consists of the tank bottom, walls, front wall, rear gable, breastworks, and architrave. Typically, design and production practices include two to six 300x400mm pressure relief holes located 500x750mm above the glass liquid level on the breastworks on either side of the working section. Some of these holes serve as dilution air inlets, while others are left open for heat dissipation and pressure relief. Some companies also use these holes as inlets for space cooling water. These holes relieve and regulate pressure in the working section, as well as cool and dissipate heat from the high-temperature molten glass. The working section pressure is generally controlled at around 10-25 Pa. However, a common problem in actual production is that the windows or doors surrounding the working section are often opened for production operations, access, or ventilation. This often results in dust being blown onto the molten glass surface due to wind and airflow, contaminating the glass and causing defects such as ash bubbles, stones, and boils on the glass sheets. In addition, during the design and construction, the dilution air inlet and the pressure relief and heat dissipation holes are placed in the same horizontal space area. From the perspective of fluid dynamics, the wind often blows in from one side and runs out from the other side, which leads to low heat exchange efficiency, wastes electricity, is not conducive to production, and increases production costs.

[0003] In existing technology, some glass manufacturers build pressure relief holes on both sides of the working section perpendicularly to the breast wall of the working section. This structure connects the pressure relief holes at the bottom, forming a small chimney-like pressure relief hole with an upper opening. This small chimney is sealed at the bottom and sealed to the pressure relief holes on the sides. While this may appear to prevent wind or airflow from blowing dust into the working section, the small chimney-like pressure relief method can easily create a suction force on the working section, affecting pressure stability in the working section, hindering production stability, wasting energy, and increasing manufacturing costs. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a glass melting furnace pressure relief device which can improve the heat exchange efficiency and save energy.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: providing a glass melting furnace pressure relief device, comprising a pressure relief body;

[0006] A dilution air inlet is provided on the breast wall of the working part of the glass melting furnace, and pressure relief holes are provided on the front wall and rear gable wall of the working part of the glass melting furnace;

[0007] The pressure relief body is a cylinder with openings at both ends, an air inlet is provided in the middle of the cylinder, and the pressure relief hole is connected to the air inlet;

[0008] The cylinder is 1000-1500mm high.

[0009] Furthermore, in the above-mentioned glass melting furnace pressure relief device, the cross-section of the cylinder is rectangular.

[0010] Furthermore, in the above-mentioned glass melting furnace pressure relief device, the length of the cross section is 420-520 mm, and the width is 420-520 mm.

[0011] Furthermore, in the above-mentioned glass melting furnace pressure relief device, the cross-section of the air inlet is a rectangle of 300*400 mm.

[0012] Furthermore, in the above-mentioned glass melting furnace pressure relief device, a gate valve is provided on the air inlet for controlling the opening of the air inlet.

[0013] Furthermore, in the above-mentioned glass melting furnace pressure relief device, the dilution air inlet is located in the area 500-750 mm vertically upward from the liquid level line of the working part of the glass melting furnace, and the pressure relief hole is located in the area 200-500 mm vertically upward from the dilution air inlet.

[0014] Furthermore, in the above-mentioned glass melting furnace pressure relief device, the dilution air inlet is located in an area 750 mm vertically away from the liquid level line of the working part of the glass melting furnace, and the pressure relief hole is located in an area 500 mm vertically upward from the dilution air inlet.

[0015] Furthermore, in the above-mentioned glass melting furnace pressure relief device, an observation window is provided on the side wall of the pressure relief body at a position corresponding to the air inlet.

[0016] Furthermore, the above-mentioned glass melting furnace pressure relief device further includes a steel structure support, and the steel structure support is used to support the pressure relief body.

[0017] Furthermore, in the above-mentioned glass melting furnace pressure relief device, the horizontal cross-section of the cylinder is circular or rectangular.

[0018] The beneficial effects of the present invention are as follows: in order to improve heat exchange efficiency, save energy, reduce waste, protect the environment, and prevent dust and dirt from contaminating the glass liquid in the working part of the melting furnace and to stabilize the pressure in the working part, the present invention creatively changes the dilution air inlet and pressure relief hole on each side of the breast wall on both sides of the working part into a dilution air inlet, so that the dilution air is closest to the lower layer of the glass liquid in the upper space of the working part, prompting the dilution air to be more dispersed and evenly delivered to the working part, and to increase and reduce the pressure and temperature more evenly and effectively, thereby reducing defects such as splatter and glass reinforcement on the glass plate surface caused by dilution air fluctuations. Another innovative point of the present invention is to design or modify the position of the pressure relief hole on the front wall and the upper part of the rear gable of the working part, and then fit a cylinder that is unobstructed from top to bottom, so that the hot air can be exhausted and dissipated through the opening above the cylinder and the lower opening. The pressure relief hole can not only dissipate heat and pressure, but also prevent dust from being blown into the working part with the air flow to contaminate the glass, generate stones and bubbles, which is more scientific and reasonable. After using the pressure relief device of the utility model, the dilution air is blown horizontally close to the glass liquid surface, and the pressure is relieved and the heat is dissipated in the plane area space at 90 degrees along the longitudinal direction of the center axis of the kiln close to the top of the kiln, which is more scientific, the area and space for heat exchange will be larger, and the heat exchange effect will be better. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the relevant structure of the glass melting furnace pressure relief device according to a specific embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of the relevant structure of the glass melting furnace pressure relief device according to a specific embodiment of the present utility model;

[0021] Figure 3 This is a structural schematic diagram of a pressure relief body of a glass melting furnace pressure relief device according to a specific embodiment of the present utility model;

[0022] Description of labels:

[0023] 1. Glass melting furnace working part; 11. Liquid level line; 12. Rear gable; 2. Tin bath; 3. Dilution air inlet; 4. Pressure relief hole; 5. Pressure relief body; 51. Air inlet; 52. Opening; 6. Observation window; 7. Steel structure support. DETAILED DESCRIPTION

[0024] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following description is given in conjunction with the embodiments and accompanying drawings.

[0025] The utility model provides a glass melting furnace pressure relief device, comprising a pressure relief body;

[0026] A dilution air inlet is provided on the breast wall of the working part of the glass melting furnace, and pressure relief holes are provided on the front wall and rear gable wall of the working part of the glass melting furnace;

[0027] The pressure relief body is a cylinder with openings at both ends, an air inlet is provided in the middle of the cylinder, and the pressure relief hole is connected to the air inlet;

[0028] The height of the cylinder is 1000-1500mm.

[0029] As can be seen from the above description, to improve heat exchange efficiency, save energy, reduce waste, protect the environment, prevent dust from contaminating the working section of the glass melting furnace, and stabilize the working section pressure, the present invention creatively replaces the dilution air inlet and pressure relief holes on each side of the breast wall of the working section with dilution air inlets. This ensures that the dilution air is closest to the lower layer of the molten glass in the upper space of the working section, promoting more uniform distribution of the dilution air into the working section, thereby more uniformly and effectively increasing and reducing the pressure and temperature. Furthermore, the pressure relief holes on the upper front wall and rear gable of the working section are located in a cylindrical body that is open from top to bottom, allowing hot air to be discharged and pressure-relieved both through the upper air outlet and through the lower outlet. This allows the pressure relief holes to dissipate heat and pressure while preventing dust from entering the working section with wind and airflow, contaminating the glass and causing stones and bubbles, making it more scientific and reasonable. With the use of the pressure relief device of the present invention, the dilution air is blown horizontally just above the molten glass surface, while pressure and heat are released in the upper space along the longitudinal plane of the furnace axis. This increases the heat exchange area and space, resulting in a better heat exchange effect.

[0030] Furthermore, in the above-mentioned glass melting furnace pressure relief device, the cross-section of the cylinder is rectangular.

[0031] Furthermore, in the above-mentioned glass melting furnace pressure relief device, the length of the cross section is 420-520 mm, and the width is 420-520 mm.

[0032] Furthermore, in the above-mentioned glass melting furnace pressure relief device, the cross-section of the air inlet is a rectangle of 300*400 mm.

[0033] Furthermore, in the above-mentioned glass melting furnace pressure relief device, a gate valve is provided on the air inlet for controlling the opening of the air inlet.

[0034] Furthermore, in the above-mentioned glass melting furnace pressure relief device, the dilution air inlet is located in the area 500-750 mm vertically upward from the liquid level line of the working part of the glass melting furnace, and the pressure relief hole is located in the area 200-500 mm vertically upward from the dilution air inlet.

[0035] Furthermore, in the above-mentioned glass melting furnace pressure relief device, the dilution air inlet is located in an area 750 mm vertically away from the liquid level line of the working part of the glass melting furnace, and the pressure relief hole is located in an area 500 mm vertically upward from the dilution air inlet.

[0036] Furthermore, in the above-mentioned glass melting furnace pressure relief device, an observation window is provided on the side wall of the pressure relief body at a position corresponding to the air inlet.

[0037] From the above description, it can be seen that the air inlet in the middle of the square cylinder is exactly aligned with the pressure relief hole on the breast wall. The opening is controlled by a plug-in valve, and a tempered glass louver is used to reserve an observation window, so as to achieve a new pressure relief method that can vent air and dissipate heat while facilitating perspective observation. It is similar to adding a cover to the pressure relief hole of the working part that can vent air and exhaust and observe the situation inside the working part.

[0038] Furthermore, the above-mentioned glass melting furnace pressure relief device further includes a steel structure support, and the steel structure support is used to support the pressure relief body.

[0039] Furthermore, in the above-mentioned glass melting furnace pressure relief device, the horizontal cross-section of the cylinder is circular or rectangular.

[0040] Example 1

[0041] See also Figure 1-3 This embodiment provides a glass melting furnace pressure relief device, wherein a dilution air inlet 3 is provided on the breast wall of the glass melting furnace working part 1, and pressure relief holes 4 are provided on the front wall and rear gable 12 of the glass melting furnace working part 1;

[0042] The pressure relief body 5 is a cylinder with openings 52 at both ends. An air inlet 51 is provided in the middle of the cylinder, and the pressure relief hole 4 is connected to the air inlet 51 .

[0043] The cylinder is 1000-1500mm high.

[0044] The working part 1 of the glass melting furnace includes a melting furnace, a neck, a working part, a flow channel and a tin bath 2. The working part includes a pool bottom, a pool wall, a front wall, a rear gable 12, breast walls on both sides and a large arch.

[0045] In the above-mentioned glass melting furnace pressure relief device, the dilution air inlet 3 is located in the area 500-750 mm vertically upward from the liquid level 11 of the glass melting furnace working part 1 , and the pressure relief hole 4 is located in the area 200-500 mm vertically upward from the dilution air inlet 3 .

[0046] The pressure relief body 5 resembles a small square chimney, but it is suspended mid-air between the front wall and rear gable 12 of the working section. The bottom of the chimney is open and unsealed, and the chimney is uniform in height from top to bottom. The air inlet 51 is located in the center of the chimney. The small chimney assembly consists of the air inlet 51, upper and lower air diffusers, and an observation window 6.

[0047] There are dilution air inlets 3 on the breast walls on both sides of the working part, a pressure relief hole 4 at a position 1250mm above the liquid level line 11 on the front wall, and a pressure relief hole 4 at a position 1250mm above the liquid level line 11 on the rear gable wall.

[0048] In order to ensure the pressure of the working part and balanced cooling and achieve higher heat exchange efficiency, the utility model creatively opens three dilution air inlets 3 at the 750mm position on the liquid level line 11 of the breast wall on both sides of the working part, so as to obtain a more balanced dilution air blowing amount, thereby meeting the forced cooling of the high-temperature molten glass liquid in the working part and a uniform and balanced cold air curtain, thereby achieving more consistent cooling of the glass liquid surface.

[0049] The pressure relief body is a welded steel structure on the side of the pressure relief hole. High-quality silica bricks (inner layer) and lightweight insulation (outer layer) bricks are used to build a square column barrel (referred to as a small chimney) with an open square lower opening and uniform upper and lower sizes and heights. The length, width and height are preferably 420*420*1000mm. The distance between the inner wall of the chimney and the outer side of the front wall and rear wall of the working part is generally controlled within the range of 100 to 300mm. An air inlet with the same size as the pressure relief port of the front wall and rear gable of the working part is left in the middle position of the inner side of the chimney, preferably 300*300mm. The pressure relief port of the front wall and rear gable of the working part and the air inlet inside the small chimney are connected and sealed by high-quality silica bricks. A gate valve is provided on the connecting channel between the pressure relief port of the front wall and rear gable of the working part and the air inlet inside the small chimney to adjust the pressure relief and heat dissipation of the working part as well as the pressure and temperature.

[0050] Furthermore, an observation window 6, 200mm long and 200mm wide, of the same size as the pressure relief hole, is provided on the outer wall of the small chimney, symmetrically with the pressure relief holes on the front wall and rear gable of the working section. The observation window 6 is embedded in the observation window 6 by forming a louver pattern with tempered fireproof glass strips, which are embedded and fixed in the observation window 6 using refractory cement. The downward-facing oblique gaps between the fireproof glass strips provide ventilation, allowing the hot air from the working section to dissipate heat and release pressure through the louver, and the situation inside the working section can also be observed through the observation window 6.

[0051] Since the small chimney is not sealed at both ends, it has an open structure from top to bottom, and the air inlet is in the middle of the small chimney, so the small chimney does not generate suction force on the working part. Based on the open structure of the small chimney with upper and lower openings, the hot air can be exhausted and dissipated through the upper air outlet and the lower outlet. The ingenious structure of the small chimney is equivalent to changing the pressure relief and heat dissipation outlet of the working part to a vertical downward and upward exhaust and heat dissipation outlet extending at an upper and lower height structure. Even if the doors and windows of the workshop are opened, even if there is wind blowing in, even if dust is blown to the vicinity of the working part by the wind or airflow, it will not be blown into the working part from the pressure relief holes on both sides of the breast wall and the pressure relief holes on the front wall and the rear gable wall, thereby contaminating the glass liquid to form stones, boils, bubbles, etc.

[0052] The above-mentioned glass melting furnace pressure relief device further includes a steel structure support 7 , and the steel structure support 7 is used to support the pressure relief body 5 .

[0053] In summary, the effects of the glass melting furnace pressure relief device of the present invention are as follows:

[0054] 1. The space close to the liquid level line of the working part is changed to dilution air blowing from both sides for cooling, boosting and stabilizing the pressure. Compared with the previous method of blowing air to cool down and boost the pressure at the same level, and also releasing pressure and cooling the temperature in the same area, which is not reasonable from the perspective of physical chemistry, the utility model artificially divides the two functions into two spatial areas to complete them, which is more reasonable, more scientific and more efficient.

[0055] 2. The pressure relief is completed in the uppermost space area, which is in line with the scientific fact that hot air rises and the heat is all in the upper layer.

[0056] 3. The utility model creatively provides a pressure relief hole that can not only dissipate heat and pressure, but also prevent dust from being blown into the working part by wind and airflow to contaminate the glass and generate stones and bubbles, which is more scientific and reasonable.

[0057] 4. Take the approach of blowing dilution air horizontally close to the glass liquid surface, and relieve pressure and dissipate heat in the plane area of ​​the upper space along the central axis of the kiln. The area and space for heat exchange will be larger, and the heat exchange effect will be better.

[0058] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the description and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A glass melting furnace pressure relief device, characterized in that: Including pressure relief body; A dilution air inlet is provided on the breast wall of the working part of the glass melting furnace, and pressure relief holes are provided on the front wall and rear gable wall of the working part of the glass melting furnace; The pressure relief body is a cylinder with openings at both ends, an air inlet is provided in the middle of the cylinder, and the pressure relief hole is connected to the air inlet; the height of the cylinder is 1000-1500mm.

2. The glass melting furnace pressure relief device according to claim 1, characterized in that: The cross section of the cylinder is rectangular.

3. The glass melting furnace pressure relief device according to claim 2, characterized in that: The length of the cross section is 420-520 mm, and the width is 420-520 mm.

4. The glass melting furnace pressure relief device according to claim 2, characterized in that: The cross section of the air inlet is a rectangle of 300*400 mm.

5. The glass melting furnace pressure relief device according to claim 1, characterized in that: The air inlet is provided with a plug valve for controlling the opening of the air inlet.

6. The glass melting furnace pressure relief device according to claim 1, characterized in that: The dilution air inlet is located in an area 500-750 mm vertically upward from the liquid level line of the working part of the glass melting furnace, and the pressure relief hole is located in an area 200-500 mm vertically upward from the dilution air inlet.

7. The glass melting furnace pressure relief device according to claim 6, characterized in that: The dilution air inlet is located in an area 750 mm vertically away from the liquid level line of the working part of the glass melting furnace, and the pressure relief hole is located in an area 500 mm vertically upward from the dilution air inlet.

8. The glass melting furnace pressure relief device according to claim 1, characterized in that: An observation window is provided on the side wall of the pressure relief body at a position corresponding to the air inlet.

9. The glass melting furnace pressure relief device according to claim 1, characterized in that: It also includes a steel structure bracket, which is used to support the pressure relief body.

10. The glass melting furnace pressure relief device according to claim 1, characterized in that: The horizontal cross section of the cylinder is circular or rectangular.

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