Cooling device for glass kiln tank wall

Abstract

The invention relates to the technical field of glass production equipment, in particular to a glass kiln pool wall cooling device which comprises an air supply pipe and a cooling air bellow. The section of the cooling air bellow in the vertical direction is a right trapezoid, and the cooling air bellow is divided into three sections from top to bottom, namely an upper air bellow, a middle air bellow and a lower air bellow; the air supply pipe is respectively communicated with the upper air box, the middle air box and the lower air box; blowing holes are formed in the cooling air bellows towards the pool wall, and the cooling air bellows sequentially correspond to the glass liquid level line of the pool wall to the bottom edge of the pool wall from top to bottom. The cooling air box has the beneficial effects that the cooling air box is large in the upper part and small in the lower part, the large end is aligned to the high-temperature liquid level line position of the upper pool wall brick, and the lower part is aligned to the low-temperature and low-cooling-intensity position below the pool wall brick, so that according to the practical situation that the pool wall brick is subjected to gradient cooling from top to bottom; organic seamless connection of the cooling intensity is carried out by adopting a strategy of reducing the cooling intensity from top to bottom in a gradient manner.

Description

Technical Field

[0001] The invention relates to the technical field of glass production equipment, and in particular to a cooling device for a glass furnace pool wall. Background Art

[0002] On the wall of the glass furnace pool, in order to reduce the erosion and scouring of the pool wall by the high-temperature molten glass liquid, cooling air is generally applied along the pool wall to the position of the liquid level line of the glass on the inner side of the pool wall to blow and cool down the pool wall in order to protect the pool wall and slow down the erosion and scouring of the pool wall bricks by the high-temperature molten glass liquid. For example, modern flat glass furnaces are gradually developing in the direction of large-scale, low-iron ultra-white. Whether it is ultra-white float glass or ultra-white rolled photovoltaic glass, due to the low iron content in ultra-white glass, the temperature gradient in the vertical direction of the glass liquid in the melting furnace is getting smaller and smaller, and the temperature of the glass liquid reaching the bottom of the pool is getting higher and higher. Therefore, in the use of modern large-scale flat glass furnaces, the erosion and scouring of the pool wall bricks by the high-temperature molten glass liquid are becoming more and more serious. Many domestic flat glass companies have frequently leaked glass water due to the production of ultra-white glass. First, the pool wall bricks of some ultra-clear photovoltaic glass melting furnaces and float ultra-clear glass melting furnaces that produce low-iron ultra-clear glass are corroded and eroded over the years, resulting in holes, which lead to glass water leakage during the production process. If discovered in time, it can be repaired, but if discovered late, it is easy to cause major accidents. Second, the seams of low-iron glass melting furnace pool wall bricks are more prone to the above-mentioned dangerous accidents.

[0003] In the prior art, the pool wall cooling method of the glass kiln is to use a flat nozzle to cool the glass liquid level, and the air volume is controlled by a manual air valve to blow air to cool the pool wall brick liquid level to slow down erosion and scouring. The above method is simple, convenient and easy to operate. The disadvantage is that the above method is an old technology, old method and old idea that was used 100 years ago when the iron content in the glass liquid was about 0.25% and the temperature gradient in the depth direction of the melting furnace was large. It is no longer suitable for modern large-scale glass kilns and low-iron ultra-white glass kilns with an iron content of about 100PPM in the glass liquid and the temperature of the pool bottom rises by more than 100 degrees.

[0004] In the prior art, in view of the fact that the pool wall bricks of large ultra-white glass kilns are easily corroded by high-temperature molten glass liquid, perforated and leaking glass water, most manufacturers adopt the method of installing 8' air ducts on the pool wall brick seams or casting holes for blowing. The above method is simple to make, saves materials and is easy to operate. The disadvantage is that the cooling area is small, the air volume at the position directly facing the pipe mouth is also large, and the cooling intensity is also large enough, but it is easy to cause the position where the pipe mouth blows air due to excessive cooling intensity, which may cause quality problems such as crystallization, boils, and cold glass in the glass, while the position far from the pipe mouth has a small air volume or even no wind cooling, and the cooling intensity is insufficient, which cannot solve the serious problems of erosion and scouring.

[0005] The present invention discloses a special method and device and application thereof, which adopts gradient cooling for pool wall bricks when the pool bottom temperature rises by more than 100 degrees for low-iron ultra-white photovoltaic glass and ultra-white float glass with an iron content of about 100 ppm, so as to reduce the erosion and scouring of the pool wall by the high-temperature molten glass liquid. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a cooling device for a glass furnace pool wall which can evenly cool the pool wall, improve the cooling efficiency and reduce the cooling cost.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: to provide a glass furnace pool wall gradient cooling device, including an air supply duct and a cooling air box; The cross section of the cooling air box in the vertical direction is a right-angle trapezoid, and the cooling air box is divided into three sections from top to bottom, namely, an upper air box, a middle air box and a lower air box; the air supply duct is connected to the upper air box, the middle air box and the lower air box respectively; The cooling air bellows are provided with blowing holes toward the pool wall, and the cooling air bellows correspond to the glass liquid surface line of the pool wall to the bottom edge of the pool wall from top to bottom.

[0008] The beneficial effects of the present invention are as follows: the cooling wind bellows of the cooling and cooling device of the pool wall of the glass kiln of the present invention are large at the top and small at the bottom, with the large end facing the position of the high temperature liquid level of the upper pool wall bricks where strong cooling is required, and the lower end facing the position where the temperature is not very high below the pool wall bricks and a slightly lower cooling intensity is required. In this way, in view of the actual situation of the pool wall bricks being cooled from top to bottom in a gradient, a strategy of reducing the cooling intensity in a gradient from top to bottom is adopted, and the cooling intensity is organically seamlessly connected, so that the cooling intensity is large where the cooling intensity should be large, and the cooling intensity is small where the cooling intensity should be small, and a seamless gradient cooling method is implemented. The old method of blowing air at a position to cool it down and blowing air at a point to cool it down is no longer used. The disadvantages of high cooling intensity or even excessive cooling in some places and too low cooling intensity in some places are avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 A schematic diagram of the relevant structure of a cooling device for a glass furnace pool wall according to a specific embodiment of the present invention; Description of labels: 1. Pool wall; 11. Glass liquid surface line; 2. Air supply duct; 3. Cooling air bellows; 31. Upper bellows; 32. Middle bellows; 33. Lower bellows; 34. Orifice flowmeter; 35. Pressure gauge; 36. Regulating valve; 4. Air blowing hole. DETAILED DESCRIPTION

[0010] See also Figure 1 The present invention provides a cooling device for a glass kiln pool wall 1, comprising an air supply duct 2 and a cooling air box 3; The cross section of the cooling air box 3 in the vertical direction is a right-angled trapezoid, and the cooling air box 3 is divided into three sections from top to bottom, namely an upper air box 31, a middle air box 32 and a lower air box 33; the air supply duct 2 is connected to the upper air box 31, the middle air box 32 and the lower air box 33 respectively; The cooling air bellows 3 are provided with blowing holes 4 facing the pool wall 1 , and the cooling air bellows 3 correspond to the glass liquid level 11 of the pool wall 1 to the bottom edge of the pool wall 1 from top to bottom.

[0011] As can be seen from the above description, the beneficial effects of the present invention are: the cooling wind bellows 3 of the cooling and cooling device of the glass kiln pool wall 1 of the present invention are large at the top and small at the bottom. The upper bellows are aimed at the place above the pool wall 1 where the temperature is high and the liquid surface line needs strong cooling, and the lower bellows are aimed at the place below the pool wall 1 where the temperature is not very high and the cooling intensity is slightly lower. In this way, in view of the actual situation of the pool wall 1 being cooled from top to bottom in a gradient, a strategy of reducing the cooling intensity from top to bottom is adopted to achieve organic seamless connection of the cooling intensity, so that the cooling intensity is high where the cooling intensity is high and low where the cooling intensity is low, and a seamless gradient cooling method is implemented. The old method of blowing air at a position for cooling is no longer used, while the lower part of the pool wall 1 is not cooled by cooling air; the pipe mouth blows air at a point for cooling. The disadvantages of high cooling intensity or even excessive cooling in some places and too low cooling intensity in some places are avoided.

[0012] Furthermore, in the cooling and temperature reduction device for the glass kiln pool wall 1 , the right-angled side of the right-angled trapezoid of the cooling air blower 3 faces the pool wall 1 .

[0013] It can be seen from the above description that when the right-angled trapezoidal bellows 3 are evenly placed close to the pool wall 1, the cooling intensity is greater where the cooling intensity is greater, and the cooling intensity is less where the cooling intensity is less.

[0014] Furthermore, in the cooling and temperature reduction device for the glass furnace pool wall 1, the distance between the cooling air bellows 3 and the pool wall 1 is 5-10 mm.

[0015] From the above description, it can be seen that the above 5-10 mm is the optimal distance and has the best cooling effect.

[0016] Furthermore, in the cooling device for the glass furnace pool wall 1, the size of the blowing holes 4 is 3-15 mm, and the hole spacing between the blowing holes 4 is 5-30 mm.

[0017] It can be seen from the above description that the size and spacing of the blowing holes 4 are set to achieve the best cooling effect.

[0018] Furthermore, in the cooling and temperature reduction device for the glass furnace pool wall 1, the cooling air bellows 3 is made of 3-6 mm steel plate.

[0019] It can be seen from the above description that the steel plate of the above thickness can save costs while being sufficient.

[0020] Furthermore, in the cooling device for the pool wall 1 of the glass furnace, a temperature sensor is provided on the outer side of the pool wall 1 corresponding to the glass liquid level line 11 .

[0021] From the above description, it can be seen that a temperature sensor is arranged on the outside of the pool wall 1 corresponding to the glass liquid surface line 11. According to the temperature detected by the temperature sensor, if the above temperature is not enough to prevent the erosion of the glass liquid surface, the regulating valve will start to increase the air volume of the branch pipe; if the above temperature is excessively cooled, it may cause energy waste, and the regulating valve will start to reduce the air volume.

[0022] Furthermore, in the cooling device for the pool wall 1 of the glass kiln, a temperature sensor is provided on the outer side of the pool wall 1 corresponding to the wind box 32 .

[0023] From the above description, it can be seen that a temperature sensor is also installed on the pool wall 1 corresponding to the position of the middle wind box 32. If the temperature on the outer side of the above-mentioned pool wall 1 is too high and is not enough to prevent the erosion of the middle glass liquid and produce refractory bubbles, the regulating valve of the air duct on the wind box corresponding to the above-mentioned pool wall 1 is started to increase the air volume, thereby increasing the cooling intensity and preventing the glass liquid from corroding the pool wall 1.

[0024] Furthermore, in the cooling device for the pool wall 1 of the glass kiln, a temperature sensor is provided on the outer side of the pool wall 1 corresponding to the lower wind box 33 .

[0025] From the above description, it can be seen that the lower the pool wall 1 is, the lower the temperature of the glass liquid is, and the smaller the erosion and scouring of the pool wall 1 is, so the small bellows at the bottom can be designed to be small, and the wind pressure is also small. Similarly, a temperature sensor is also set in the middle position of the pool wall 1 corresponding to the small bellows. When the temperature detected by the temperature sensor is not enough to prevent the erosion and scouring of the glass liquid, and refractory bubbles are generated, the regulating valve starts to increase the cooling air volume. When the temperature of the lower section of the pool wall 1 is detected to be low, there is transitional cooling causing energy waste or local overcooling, the regulating valve starts to reduce the air volume.

[0026] Furthermore, in the cooling device for the glass kiln pool wall 1, the air supply duct 2 is connected to the upper wind box 31, the middle wind box 32 and the lower wind box 33 through three branch pipes; the three branch pipes are respectively provided with an orifice flow meter 34, a pressure gauge 35 and a regulating valve 36.

[0027] Example 1 The glass melting furnace comprises a pool wall 1, a pool bottom, a glass liquid surface 11, a breast wall and a large arch. A cooling device for the pool wall of the glass furnace is installed outside the pool walls on both sides of the furnace.

[0028] See also Figure 1 The cooling device of the glass furnace pool wall 1 of this embodiment includes an air supply duct 2 and a cooling air box 3; The cross section of the cooling air box 3 in the vertical direction is a right-angled trapezoid, and the cooling air box 3 is divided into three sections from top to bottom, namely an upper air box 31, a middle air box 32 and a lower air box 33; the air supply duct 2 is connected to the upper air box 31, the middle air box 32 and the lower air box 33 respectively; The cooling air bellows 3 are provided with blowing holes 4 facing the pool wall 1 , and the cooling air bellows 3 correspond to the glass liquid level 11 of the pool wall 1 to the bottom edge of the pool wall 1 from top to bottom.

[0029] The right angle side of the right angle trapezoid of the cooling air box 3 faces the pool wall 1. The distance between the cooling air box 3 and the pool wall 1 is 5-10 mm.

[0030] The air supply duct 2 is connected to the upper air box 31, the middle air box 32 and the lower air box 33 through three branch pipes; the three branch pipes are respectively provided with an orifice flowmeter 34, a pressure gauge 35 and a regulating valve 36. The air supply duct 2 is a heat-resistant seamless steel pipe with a diameter of 100-180 mm and a wall thickness of 3-6 mm. The three branch pipes are seamless heat-resistant steel pipes with a wall thickness of 3-6 mm. The respective pressure gauges 35, orifice flowmeters 34 and regulating valves on the three branch pipes are electrically connected to the control cabinet PLC.

[0031] The cooling air bellows 3 is a three-dimensional trapezoidal quadrilateral structure, welded from 3-6mm heat-resistant steel plates, with a height of 1150mm-1600mm and a width of 350-400mm (preferably the same width as the bricks of the pool wall 1). The thickness of the bellows is 130-200mm at the top and 100-160mm at the bottom. There are two partitions in the bellows that divide the bellows into three bellows structures, namely, upper, middle and lower. Three pressure gauges 35 are respectively installed on the lower bellows 33, the middle bellows 32 and the upper bellows 31, and the bellows pressure gauges 35 are electrically connected to the control cabinet PLC.

[0032] Through holes are respectively left on the side of the bellows close to the pool wall 1 as blowing holes 4, the diameter of the through hole on the upper bellows 31 is 10-15mm, the diameter of the through hole on the middle bellows 32 is 5-10mm, and the diameter of the through hole on the lower bellows 33 is 3-8mm. The diameters of the through holes on the bellows are all large at the top and small at the bottom, dense at the top and sparse at the bottom, and progressively change, which plays the corresponding scientific principle that when the temperature of the upper pool wall 1 is high, the wind is strong and the cooling intensity is high, and when the temperature of the lower pool wall 1 gradually decreases to a certain extent, the wind is small and the cooling intensity is low.

[0033] Furthermore, a temperature sensing sensor is provided at the center position of the pool wall 1 corresponding to the upper air box 31, the middle air box 32 and the lower air box 33, which collects temperature data in time and transmits it to PID. The temperature can be automatically controlled by PID adjustment to ensure a suitable cooling effect on the pool wall 1.

[0034] The upper edge of the upper wind box 31 is directly opposite to the position of the glass liquid level 11 inside the pool wall 1, and a transverse air nozzle is arranged along the upper edge of the upper wind box 31, and the diameter of the transverse air nozzle is 30-50 mm, so as to strengthen the cooling intensity of the liquid level position on the pool wall 1.

[0035] 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 cooling device for a glass furnace pool wall, characterized in that: It includes an air supply duct and a cooling air box; The cross section of the cooling air box in the vertical direction is a right-angle trapezoid, and the cooling air box is divided into three sections from top to bottom, namely, an upper air box, a middle air box and a lower air box; the air supply duct is connected to the upper air box, the middle air box and the lower air box respectively; The cooling air bellows are provided with blowing holes toward the pool wall, and the cooling air bellows correspond to the glass liquid surface line of the pool wall to the bottom edge of the pool wall from top to bottom.

2. The cooling device for the glass furnace pool wall according to claim 1, characterized in that: The right-angled side of the right-angled trapezoid of the cooling air box faces the pool wall.

3. The cooling device for the glass furnace pool wall according to claim 1 is characterized in that: The distance between the cooling air box and the pool wall is 5-10 mm.

4. The cooling device for the glass furnace pool wall according to claim 1 is characterized in that: The size of the blowing holes is 3-15 mm, and the spacing between the blowing holes is 5-30 mm.

5. The cooling device for the glass furnace pool wall according to claim 1, characterized in that: The cooling air bellows is made of 3-6 mm steel plate.

6. The cooling device for the glass furnace pool wall according to claim 1, characterized in that: A temperature sensor is provided on the outer side of the pool wall corresponding to the glass liquid level line.

7. The cooling device for the glass furnace pool wall according to claim 1 is characterized in that: A temperature sensor is arranged on the outer side of the pool wall corresponding to the stroke box.

8. The cooling device for the glass furnace pool wall according to claim 1, characterized in that: A temperature sensor is arranged on the outer side of the pool wall corresponding to the lower wind box.

9. The cooling device for the glass furnace pool wall according to claim 1, characterized in that: The air supply duct is connected with the upper air box, the middle air box and the lower air box respectively through three branch pipes; the three branch pipes are respectively provided with an orifice flow meter, a pressure gauge and a regulating valve.

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