Pressure relief device of glass melting furnace

Abstract

The invention belongs to the technical field of glass production and manufacturing processes, and particularly relates to a glass melting furnace pressure relief device 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 hole is formed in an area with the upward vertical distance of more than 200-500mm at the dilution air inlet; the pressure relief body is a cylinder with two open ends, an air inlet is formed in the middle of the cylinder, and the pressure relief hole is communicated with the air inlet. The device has the beneficial effects that dilution air inlets and pressure relief holes in each side of the breast walls on the two sides of the working part are all changed into dilution air inlets, the pressure relief holes are formed in the upper portions of the front end wall and the rear gable wall of the working part, the barrel which is unblocked up and down is matched, and hot air can be exhausted and dissipated through an opening in the upper portion of the barrel; and exhaust and heat dissipation can be realized through the lower opening. And dust is prevented from being blown into the working part along with airflow to pollute glass and generate stones and bubbles, so that the device is more scientific and reasonable.

Description

Technical Field

[0001] The invention belongs to the technical field of glass production and manufacturing process, and in particular relates to a pressure relief device for a glass melting furnace. Background Art

[0002] The cooling part of the flat glass furnace is also called the working part. It is an important temperature-regulating thermal equipment for glass liquid. The working part consists of the pool bottom, pool wall, front wall, rear gable, breast walls on both sides and the large arch. Generally, in design and production, it is customary to leave 2 to 6 300*400mm pressure relief holes on the breast walls on both sides of the working part at 500 to 750mm above the glass liquid surface line. Some of the pressure relief holes are used as dilution air inlets, some open openings are used as heat dissipation and pressure relief holes, and some reserved holes are used by some companies as space cooling water bag penetration holes, which play a role in pressure relief and pressure regulation of the working part and cooling and heat dissipation of high-temperature molten glass liquid. The pressure of the working part is generally controlled at about 10 to 25Pa. However, the problem in the actual production process is that due to the needs of production operations or passage or ventilation, the protective windows or doors of the working part workshop are often opened, which often cause dust to blow into the surface of the glass liquid in the working part due to environmental wind or airflow factors, polluting the glass liquid and forming gray bubbles, stones, boils and other defects on the glass plate surface. 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 plane space area. From the perspective of fluid dynamics, the wind often blows in from one side and runs out from the other side, resulting in low heat exchange efficiency, wasting electricity, being detrimental to production, and increasing production costs.

[0003] In the prior art, some glass companies build the pressure relief holes on both sides of the working part directly upward and perpendicular to the breast wall of the working part. The pressure relief holes are connected to the bottom of the above structure to form a pressure relief hole similar to a small chimney with an upper opening. The above small chimney is closed at the bottom and sealed with the pressure relief hole on the side. Although it seems that wind or airflow can be prevented from blowing dust into the working part, the small chimney-type pressure relief method can easily form a suction force on the working part, affecting the pressure stability of the working part, which is not conducive to production stability, and wastes energy and increases production costs. Summary of the invention

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

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

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

[0007] The pressure relief hole is located at a vertical distance of more than 200 mm upward from the dilution air inlet;

[0008] The pressure relief body is a cylinder with openings at both ends, an air inlet is arranged in the middle of the cylinder, and the pressure relief hole is connected to the air inlet.

[0009] The beneficial effects of the present invention are: in order to improve the heat exchange efficiency, save energy, reduce waste, protect the environment, avoid dust and dirt from polluting the glass liquid in the working part of the melting furnace, and stabilize the pressure of 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, and the dilution air is sent to the working part more dispersed and evenly, and the pressure is increased and cooled more evenly and effectively, and the defects such as the shower and glass reinforcement on the glass plate surface caused by the fluctuation of the dilution air are reduced. Another innovative point of the present invention is to design or modify the position of the pressure relief hole on the front end 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 can also be exhausted and dissipated through 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 airflow to pollute the glass, produce stones and bubbles, which is more scientific and reasonable. After using the pressure relief device of the present invention, the dilution air is blown horizontally close to the top of the glass liquid, 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 axial direction of the kiln close to the top of the arch. This 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

[0010] Figure 1 It is a schematic diagram of the relevant structure of the pressure relief device of the glass melting furnace according to a specific embodiment of the present invention;

[0011] Figure 2 It is a schematic diagram of the relevant structure of the pressure relief device of the glass melting furnace according to a specific embodiment of the present invention;

[0012] Figure 3 It 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 invention;

[0013] Description of labels:

[0014] 1. Working part of glass melting furnace; 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

[0015] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0016] The present invention provides a glass melting furnace pressure relief device, comprising a pressure relief body;

[0017] A dilution air inlet is arranged on the breast wall of the working part of the glass melting furnace, and a pressure relief hole is arranged on the front wall and the rear gable wall of the working part of the glass melting furnace;

[0018] The pressure relief hole is located at a vertical distance of more than 200 mm upward from the dilution air inlet;

[0019] The pressure relief body is a cylinder with openings at both ends, an air inlet is arranged in the middle of the cylinder, and the pressure relief hole is connected to the air inlet.

[0020] As can be seen from the above description, in order to improve the heat exchange efficiency, save energy, reduce waste, protect the environment, avoid dust pollution of the working part of the glass melting furnace and stabilize the pressure of 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, and the dilution air is more evenly dispersed and sent to the working part, and the pressure and temperature are increased and reduced more evenly and effectively. Further, at the position of the pressure relief hole on the front wall and the upper part of the rear gable of the working part, a cylinder that is unobstructed from top to bottom is matched, and the hot air can be exhausted through the upper air outlet for heat dissipation and pressure relief, and can also be exhausted through the lower outlet for heat dissipation and pressure relief. The pressure relief hole can not only dissipate heat and pressure relief, but also avoid dust from being blown into the working part with wind and airflow to pollute the glass, produce stones and bubbles, which is more scientific and reasonable. After using the pressure relief device of the present invention, the dilution air is blown horizontally close to the glass liquid surface, and the pressure and heat are relieved in the longitudinal plane area space along the axis direction of the kiln in the upper space, and the area and space of heat exchange will be larger, and the heat exchange effect will be better.

[0021] 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.

[0022] 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 in the longitudinal direction of the area 200-500 mm vertically upward from the dilution air inlet.

[0023] Furthermore, in the above-mentioned glass melting furnace pressure relief device, the dilution air inlet is located in the area about 500-750mm vertically away from the liquid level line of the working part of the glass melting furnace, and the pressure relief hole is in the area about 500mm vertically upward from the dilution air inlet.

[0024] Furthermore, in the above-mentioned glass melting furnace pressure relief device, two pressure relief holes are respectively provided on the front end wall and the rear gable wall, and the size of the holes is 300*400mm.

[0025] From the above description, it can be seen that during the construction stage of the glass kiln, two pressure relief holes will be reserved in advance on the front wall and the rear gable wall of the working part during masonry. The pressure relief holes serve to relieve and regulate the pressure in the space above the high-temperature molten glass surface, stabilize the pressure in the working part, adjust the cooling speed and efficiency of the glass liquid in the working part, ensure the appropriate temperature characteristics of glass forming, and the heat dissipation of the working part.

[0026] Furthermore, in the above-mentioned glass melting furnace pressure relief device, 3-6 dilution air inlets are respectively provided on the breast walls on both sides of the working part of the glass melting furnace depending on the size of the working part.

[0027] As can be seen from the above description, the above arrangement evenly distributes the dilution air volume to the dilution air inlets of the breast walls on both sides of the working part. To ensure the pressure of the working part and balanced cooling, and achieve a higher heat exchange efficiency, the present invention creatively opens 3-6 dilution air inlets at 500mm-750mm positions on the liquid surface line of the breast walls on both sides of the working part, so as to obtain a more balanced dilution air blowing amount, so as to meet the forced cooling of the high-temperature molten glass liquid in the working part and a uniform and balanced cold air curtain, and achieve a more consistent cooling of the glass liquid surface.

[0028] Furthermore, in the above-mentioned glass melting furnace pressure relief device, the size of the dilution air inlet is 300*400mm.

[0029] 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.

[0030] From the above description, it can be seen that the air inlet in the middle of the square cylinder is just aligned with the pressure relief hole on the breast wall. The opening is controlled by a plug 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 hood to the pressure relief hole of the working part that can vent air and exhaust and see the situation inside the working part.

[0031] Furthermore, the above-mentioned glass melting furnace pressure relief device also includes a steel structure support, and the steel structure support is used to support the pressure relief body.

[0032] Furthermore, in the above-mentioned glass melting furnace pressure relief device, the horizontal cross-section of the cylinder is circular or rectangular.

[0033] Example 1

[0034] 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 a pressure relief hole 4 is provided on the front wall and the rear gable 12 of the glass melting furnace working part 1;

[0035] The pressure relief hole 4 is located at a vertical distance of about 200-500 mm upward from the dilution air inlet 3;

[0036] 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 .

[0037] 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 end wall, a rear gable 12, breast walls on both sides and a large arch.

[0038] 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.

[0039] The pressure relief body 5 is similar to a small square chimney, but the difference is that the small square chimney is suspended and fixed in the air between the front wall of the working part and the rear gable 12, the bottom of the small square chimney is open and not sealed, and the chimney has the same thickness and size from top to bottom, and the air inlet 51 is in the middle of the small chimney. The small chimney device consists of the air inlet 51, the upper air diffuser and the lower air diffuser, and the observation window 6.

[0040] There are dilution air inlets 3 on the breast walls on both sides of the working part, a pressure relief hole 4 is provided on the front wall at a position 1250 mm above the liquid level line 11, and a pressure relief hole 4 is provided on the rear gable wall at a position 1250 mm above the liquid level line 11.

[0041] In order to ensure the pressure of the working part and balanced cooling and achieve higher heat exchange efficiency, the present invention 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.

[0042] The pressure relief body is a steel structure welded 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 body (referred to as a small chimney) with an open square bottom opening and consistent upper and lower sizes and heights. The length, width and height are preferably (420-520)*(420-520)*(1500-2000)mm. The distance between the inner wall of the chimney and the outer side of the front wall and the rear wall of the working part is generally controlled at 100-30 0mm, an air inlet of the same size as the pressure relief port of the front wall and the rear gable of the working part is reserved in the middle position of the inner side of the chimney, preferably 300*300mm. The pressure relief port of the front wall and the rear gable of the working part and the air inlet on the inner side of the small chimney are connected and sealed by high-quality silicon bricks. A gate valve is arranged on the connecting channel between the pressure relief port of the front wall and the rear gable of the working part and the air inlet on the inner side of the small chimney to adjust the pressure relief and heat dissipation of the working part as well as the pressure and temperature.

[0043] Furthermore, an observation window 6 of the same size as the pressure relief hole is arranged at a position symmetrical to the pressure relief hole of the front wall and the rear gable of the small chimney outer wall and the working part, with a length of 200 mm and a width of 200 mm. The observation window 6 is embedded in the observation window 6 by making a louver mode of a tempered fireproof glass strip, and the tempered fireproof glass strip is embedded and fixed in the observation window 6 by using refractory mud. Based on the ventilation effect of the downwardly oblique gap between the fireproof glass strips, the hot air flow of the working part can be conveniently dissipated and pressure-released through the louver, and the situation in the working part can also be seen through the observation window 6.

[0044] Since the small chimney is not sealed at both ends, it is a smooth structure, 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 smooth 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 that is extended in 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, and pollute the glass liquid to form stones, boils, bubbles, etc.

[0045] The above-mentioned glass melting furnace pressure relief device further comprises a steel structure support 7 , and the steel structure support 7 is used to support the pressure relief body 5 .

[0046] In summary, the effects of the glass melting furnace pressure relief device of the present invention are as follows:

[0047] 1. The space area close to the liquid surface line of the working part is changed to dilution air blowing cooling, boosting and stabilizing on both sides. Compared with the previous one, the same level has both blowing cooling and pressure reduction, and the same area space pressure relief, heat dissipation and temperature reduction, which is not reasonable from the perspective of physical chemistry. The present invention artificially divides the two functions into two space areas to complete, which is more reasonable, more scientific and more efficient.

[0048] 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.

[0049] 3. The present invention 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 pollute the glass and generate stones and bubbles, which is more scientific and reasonable.

[0050] 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.

[0051] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, 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 arranged on the breast wall of the working part of the glass melting furnace, and a pressure relief hole is arranged on the front wall and the rear gable wall of the working part of the glass melting furnace; The pressure relief hole is located at a vertical distance of more than 200 mm upward from the dilution air inlet; The pressure relief body is a cylinder with openings at both ends, an air inlet is arranged in the middle of the cylinder, and the pressure relief hole is connected to the air inlet.

2. 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.

3. The glass melting furnace pressure relief device according to claim 1, characterized in that: The dilution air inlet is located in the region of 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 region of 200-500 mm vertically upward from the dilution air inlet.

4. The glass melting furnace pressure relief device according to claim 3, 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.

5. The glass melting furnace pressure relief device according to claim 1, characterized in that: Two pressure relief holes are respectively arranged on the front end wall and the rear gable wall.

6. The glass melting furnace pressure relief device according to claim 1, characterized in that: 3-6 dilution air inlets are respectively arranged on the breast walls on both sides of the working part of the glass melting furnace.

7. The glass melting furnace pressure relief device according to claim 1, characterized in that: The dilution air inlet size is 300*400mm.

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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