Glass melting furnace and melting method thereof

Abstract

The invention relates to the technical field of glass melting furnaces, and provides a glass melting furnace which comprises a furnace body, a heating device and a conveying device used for supplying materials to the furnace body, the heating device comprises a plurality of heating electrodes and a plurality of combustors, the furnace body is provided with a discharge flue, and a plurality of smoke outlets used for communicating the discharge flue with the furnace body are formed between the discharge flue and the furnace body; the conveying device comprises a conveying pipe, a conveying auger and a conveying motor, all the heating electrodes are located in the conveying pipe, the conveying auger is rotationally connected to the interior of the conveying pipe, the conveying auger is in linkage with an output shaft of the conveying motor, the conveying pipe is communicated with the kiln body, and a waste heat recovery device is arranged between the discharge flue and the conveying pipe; the waste heat recovery device comprises a heat exchanger and a fan, the heat exchanger comprises a first fluid pipe and a second fluid pipe, the first fluid pipe is communicated with the discharge flue, and the second fluid pipe is communicated with an air outlet of the fan and the conveying pipe. According to the technical scheme, the problem of heat waste in the working process of the melting furnace in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of glass melting furnaces, and in particular to a glass melting furnace and a melting method thereof. Background Art

[0002] A glass melting furnace generally refers to a glass product production equipment that melts glass raw materials at high temperatures. At present, most glass melting furnaces use burners and other combustion devices to provide a high-temperature and efficient heating process for the glass raw materials to ensure the heating efficiency of the glass melting furnace. The burner will produce flue gas containing particulate matter such as sulfides, nitrogen oxides, fluorides, and particulate dust during the flame heating process. In order to prevent these particulate matter from adhering to the glass surface or dissolving in the molten glass, resulting in adverse chemical reactions or color changes in the glass, affecting the purity and quality of the glass.

[0003] Therefore, the interior of the glass melting furnace is usually equipped with a smoke exhaust port, through which the smoke inside the melting furnace is discharged, thereby ensuring the purity and quality of the glass; but when exhausting smoke through the smoke exhaust port, a part of the temperature inside the melting furnace will also be discharged from the melting furnace along with the smoke, resulting in heat waste in the operation of the melting furnace. Summary of the invention

[0004] The present invention provides a glass melting furnace and a melting method thereof, which solve the problem of heat waste in the working process of the melting furnace in the related art.

[0005] The technical solution of the present invention is as follows:

[0006] A glass melting furnace comprises a kiln body, a heating device, and a conveying device for feeding the kiln body, the heating device comprises a plurality of heating electrodes and a plurality of burners, the kiln body is provided with a smoke exhaust duct, and a plurality of smoke exhaust ports for connecting the smoke exhaust duct and the kiln body are provided between the two; the conveying device comprises a conveying pipe, a conveying auger, and a conveying motor, each of the heating electrodes is located in the conveying pipe, the conveying auger is rotatably connected to the inside of the conveying pipe, and the conveying auger is linked to the output shaft of the conveying motor, the conveying pipe is communicated with the kiln body, and a waste heat recovery device is provided between the smoke exhaust duct and the conveying pipe; the waste heat recovery device comprises a heat exchanger and a fan, the heat exchanger comprises a first fluid pipe and a second fluid pipe, the first fluid pipe is communicated with the smoke exhaust duct, and the second fluid pipe connects the air outlet of the fan and the conveying pipe.

[0007] Furthermore, both sides of the kiln body are provided with smoke exhaust ducts, waste heat recovery devices, and several smoke exhaust ports. The delivery pipe has several preheating ports for connecting the second fluid pipes to the delivery pipe. The preheating ports are symmetrically distributed with the delivery pipe as the center and there are connecting channels between the preheating ports.

[0008] Furthermore, the kiln body has an inlet for communicating with the conveying pipe, the inlet is provided with a smoke baffle, the smoke baffle is located at one end of the inlet away from the conveying pipe, and the end of the smoke baffle away from the horizontal plane is rotatably connected to the kiln body.

[0009] Furthermore, each of the smoke exhaust ports is provided with an anti-backflow hole at one end close to the kiln body, and the aperture of the anti-backflow hole at the end close to the kiln body is smaller than the aperture of the anti-backflow hole at the end away from the kiln body.

[0010] Furthermore, a plurality of filter plates are arranged in the smoke exhaust duct, each of the filter plates is fixedly connected to the smoke exhaust duct, and each of the filter plates is arranged at intervals in the smoke exhaust duct, and adjacent filter plates are respectively located on both sides of the radial surface of the smoke exhaust port.

[0011] Furthermore, the smoke exhaust duct is provided with a plurality of cleaning ports, each of which is provided with a cover plate, each of which is fixedly connected to one end of the smoke exhaust duct close to the horizontal plane, and a fixed sealing structure is provided between each cover plate and each cleaning port.

[0012] Furthermore, the fixed sealing structure includes a plurality of fixing holes, a plurality of fixing parts, and a plurality of first sealing gaskets. Each of the fixing holes is opened on the smoke exhaust duct, and each of the fixing holes is opened at one end of the smoke exhaust duct close to the horizontal plane. Each of the cover plates is opened with a plurality of connecting holes, and each of the connecting holes corresponds to each of the fixing holes one by one. Each of the fixing parts is threadedly connected to each of the fixing holes and the connecting holes one by one, and each of the first sealing gaskets is located one by one between each of the fixing parts and the connecting holes.

[0013] Furthermore, the longitudinal section of each of the cover plates is an inverted "T"-shaped structure, each of the cover plates includes an abutment body and a connecting plate body, each of the connecting holes is opened on the connecting plate body, the connecting plate body is fixedly connected to the smoke exhaust duct, and a second sealing gasket is provided between the connecting plate body and the smoke exhaust duct.

[0014] Furthermore, a baffle is provided inside the kiln body, each of the smoke exhaust ports is located between the baffle and the smoke baffle, and the baffle is integrally formed with the kiln body.

[0015] Glass melting method: 1. When the kiln melts glass for the first time, put the glass raw materials into the conveying pipe, and use the conveying auger to deliver the glass raw materials into the kiln, and at the same time use the heating electrode inside the conveying pipe to preheat the glass raw materials; 2. Use the burner to melt the glass raw materials inside the kiln; 3. Use the waste heat recovery device to recover the heat in the flue gas generated by melting the glass, and deliver the heat to the conveying pipe to provide heat for the glass raw materials inside the conveying pipe; 4. The conveying pipe continues to maintain the conveying work and continuously provides glass raw materials to the kiln.

[0016] The working principle and beneficial effects of the present invention are:

[0017] 1. The present invention is provided with a waste heat recovery device for the exhaust duct of the kiln body. The waste heat recovery device mainly includes a heat exchanger and a fan. The heat exchanger itself has a first fluid pipe and a second fluid pipe; wherein the first fluid pipe is connected to the exhaust duct, so that the heat medium (high temperature gas) in the exhaust duct can enter the heat exchanger and transfer the heat to the wall of the heat exchanger. The second fluid pipe connects the air outlet of the fan and the conveying pipe, so that the airflow (cold medium) blown out by the fan can enter the conveying pipe through the second fluid pipe, and in the process of the airflow (cold medium) blown out by the fan going to the conveying pipe, the wall of the heat exchanger is gradually heated up by the action of the heat medium, thereby causing the temperature of the airflow in the second fluid pipe to rise, and finally the airflow in the second fluid pipe is used to heat the glass raw materials in the conveying pipe; that is, through the waste heat recovery device, the heat discharged from the exhaust duct is transferred to the conveying pipe, and the discharged heat is used to preheat the glass raw materials, preheat the glass raw materials being conveyed, remove the gas and moisture in the glass raw materials, and reduce the possibility of bubbles in the melting process. This helps to improve the quality of glass products, reduce defects and impurities, and avoid wasted heat.

[0018] 2. Considering that it is difficult for the waste heat recovery device to directly recover heat when the kiln body is first started for melting operation, the present invention provides a heating electrode in the conveying pipe for feeding the kiln body. When the waste heat recovery device fails to recover heat, the heating electrode can be started (powered by the heating electrode) to heat the heating electrode to preheat the glass raw materials; subsequently, the heating electrode can be turned off depending on the actual application situation to reduce energy consumption, or the heating electrode can be kept in a heated state to cooperate with the waste heat recovery device to recover heat and improve the preheating effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] Figure 1 It is a structural schematic diagram of this embodiment;

[0021] Figure 2 for Figure 1 The main view;

[0022] Figure 3 for Figure 1 A partial cross-sectional view of

[0023] Figure 4 Schematic diagram of the internal structure of the delivery pipe in this embodiment;

[0024] Figure 5 is a cross-sectional view of the kiln body in this embodiment;

[0025] Figure 6 Schematic diagram of the connection between each exhaust duct and the kiln body in this embodiment;

[0026] Figure 7 for Figure 6 A partial enlarged view of the middle part;

[0027] Figure 8 This is a view of the internal structure of the smoke exhaust duct in this embodiment;

[0028] Fig. 9 Schematic diagram of the cover plate and the second sealing gasket in this embodiment.

[0029] In the figure:

[0030] 1. Kiln body; 11. Smoke exhaust duct; 111. Cleaning port; 12. Smoke exhaust port; 121. Anti-backflow hole; 13. Feeding port; 14. Baffle; 2. Conveying device; 21. Conveying pipe; 211. Preheating port; 212. Connecting channel; 22. Conveying auger; 23. Conveying motor; 3. Heating electrode; 4. Burner; 5. Waste heat recovery device; 51. Heat exchanger; 511. First fluid pipe; 512. Second fluid pipe; 52. Fan; 6. Smoke baffle; 7. Filter plate; 8. Cover plate; 81. Abutment body; 82. Connecting plate body; 9. Fixed sealing structure; 91. Connecting hole; 92. Fixed hole; 93. Fixing piece; 94. First sealing gasket; 95. Second sealing gasket. DETAILED DESCRIPTION

[0031] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] like Figure 1-2 , Figure 5 As shown, this embodiment proposes a glass melting furnace, which mainly includes a kiln body 1, a heating device, and a conveying device 2 for feeding the kiln body 1. The heating device includes a plurality of heating electrodes 3 and a plurality of burners 4. Each burner 4 is located inside the kiln body 1. That is, this embodiment mainly uses the burner 4 as a glass melting tool. Natural gas and air are mixed and ignited through the burner 4 to form a high-temperature flame, so that the glass raw materials are melted into a glass melt.

[0033] The kiln body 1 is provided with a smoke exhaust duct 11, and a plurality of smoke exhaust ports 12 are provided between the smoke exhaust duct 11 and the kiln body 1 for connecting the two. Each smoke exhaust port 12 is located on the side wall of the kiln body 1 close to the end of the kiln body 1 away from the horizontal plane (the top of the kiln body 1), so that the rising high-temperature gas (smoke) can enter the smoke exhaust duct 11 through the smoke exhaust port 12; at the same time, due to the high temperature generated by the kiln body 1 during operation, the air pressure at the kiln body 1 is increased. According to the principle that fluids flow from high-pressure areas to low-pressure areas in thermodynamics, the high-temperature gas inside the kiln body 1 will enter the smoke exhaust duct 11 under the action of the pressure difference to realize smoke emission; and the smoke exhaust duct 11 can also be equipped with a blower, which drives the gas flow inside the smoke exhaust duct 11, thereby reducing the internal air pressure of the smoke exhaust duct 11, increasing the pressure difference between the kiln body 1 and the smoke exhaust duct 11, and improving the smoke emission efficiency.

[0034] like Figure 3 , Figure 5 As shown, the conveying device 2 in this embodiment includes a conveying pipe 21, a conveying auger 22, and a conveying motor 23. The conveying auger 22 is rotatably connected to the inside of the conveying pipe 21, and the conveying auger 22 is linked to the output shaft of the conveying motor 23. The conveying pipe 21 is connected to the kiln body 1, that is, the conveying device 2 in this embodiment uses a spiral conveying method to convey the glass raw materials into the kiln body 1, so as to ensure the uniformity of material conveying, and facilitate the waste heat recovery device 5 provided between the exhaust duct 11 and the conveying pipe 21 to achieve uniform heating of the glass raw materials;

[0035] The conveying motor 23 in this embodiment should preferably be an asynchronous motor or other motor equipment with large driving force and high temperature resistance to prevent the conveying motor 23 in this embodiment from being overloaded due to insufficient driving force and excessive ambient temperature when driving the conveying auger 22, thereby ensuring the stability and safety of the operation of this embodiment.

[0036] The waste heat recovery device 5 includes a heat exchanger 51 and a fan 52. The heat exchanger 51 includes a first fluid pipe 511 and a second fluid pipe 512. The end of the first fluid pipe 511 close to the smoke exhaust duct 11 is connected to the smoke exhaust duct 11, so that the high-temperature gas in the smoke exhaust duct 11 enters the heat exchanger 51 through the first fluid pipe 511, providing heat medium (heat) for the heat exchange of the heat exchanger 51. The end of the first fluid pipe 511 away from the smoke exhaust duct 11 should be connected to a smoke exhaust device such as a desulfurization tower or a chimney to finally achieve the flue gas discharge. The specific equipment connected to the end of the first fluid pipe 511 away from the smoke exhaust duct 11 should be determined according to the actual situation, and this embodiment will not be repeated. The second fluid pipe 512 connects the air outlet of the fan 52 and the conveying pipe 21, that is, through the fan 52, the second fluid pipe 512 can have a cold medium that can exchange heat with the hot medium in the first fluid pipe 511, so that the airflow finally entering the conveying pipe 21 has a certain temperature. In this way, the glass raw materials in the conveying pipe 21 are preheated, the gas and moisture in the glass raw materials are driven out, and the possibility of bubbles being generated during the melting process is reduced. This helps to improve the quality of glass products, reduce defects and impurities, and avoid wasting heat.

[0037] Considering that the heat exchanger 51 in this embodiment is used to exchange heat with the high-temperature gas generated by the kiln body 1 which is usually maintained at a high temperature between 1500°C and 1600°C, the heat exchanger 51 in this embodiment is preferably a plate heat exchanger or other heat exchange equipment that can withstand high temperatures to ensure the practicality of this embodiment.

[0038] The fan 52 in this embodiment is preferably a high-force fan such as a centrifugal fan to ensure the strength of the airflow blown by the fan 52, increase the flow speed of the cold medium in the second fluid pipe 512, and ensure the flow efficiency of the fluid in the second fluid pipe.

[0039] Furthermore, considering that it is difficult for the waste heat recovery device 5 to directly recover heat when the kiln body 1 is first started for melting, the heating electrodes 3 are evenly distributed inside the conveying pipe 21. When the waste heat recovery device 5 fails to recover heat, the heating electrodes 3 can be started (powered) to generate heat to preheat the glass raw materials in the conveying pipe 21, thereby avoiding the phenomenon that the glass raw materials cannot be preheated when the glass is first melted in this embodiment. Furthermore, in order to avoid interference between the heating electrodes 3 and the rotating conveying auger 22, an installation groove is provided on the conveying pipe 21, and each heating electrode 3 is installed in the installation groove, thereby avoiding interference between each heating electrode 3 and the conveying auger 22, thereby ensuring the safety of this embodiment.

[0040] When the waste heat recovery device 5 is able to provide heat to the conveying pipe 21, as a preferred option, the heating electrode 3 can continue to be in the startup state, and the heat generated by the heating electrode 3 and the heat recovered by the waste heat recovery device 5 can cooperate with each other to accelerate the time of preheating the glass raw materials and improve the preheating effect. In addition, the heating electrode 3 can also be turned off (stop supplying power to the heating electrode 3) to reduce energy consumption.

[0041] like Figure 1 , Figure 6 As shown, in this embodiment, both sides of the kiln body 1 are provided with a smoke exhaust duct 11, a waste heat recovery device 5, and a plurality of smoke exhaust ports 12. While ensuring the smoke exhaust efficiency of the kiln body 1, since multiple waste heat recovery devices 5 simultaneously supply heat to the conveying pipe 21, the speed of the temperature rise inside the conveying pipe 21 can be increased, thereby improving the preheating efficiency and effect.

[0042] The delivery pipe 21 has a plurality of preheating ports 211 for connecting the second fluid pipes 512 to the delivery pipe 21. The preheating ports 211 and the second fluid pipes 512 should preferably be connected by flanges to ensure the sealing and connection stability between the two. The preheating ports 211 are symmetrically distributed with the delivery pipe 21 as the center to ensure that the glass raw materials can be evenly heated in the delivery pipe 21; at the same time, in order to prevent the heated gas entering the delivery pipe 21 through the preheating ports 211 from being physically blocked by the delivery auger 22, resulting in the heated gas needing to flow slowly along the gap between the delivery auger 22 and the delivery pipe 21, there are connecting channels 212 between the preheating ports 211, so that the heated gas can flow quickly in the delivery pipe 21 along the connecting channels 212, thereby improving the heat transfer efficiency.

[0043] The kiln body 1 has an inlet 13 for communicating with the conveying pipe 21, and the inlet 13 is provided with a smoke baffle 6, which prevents smoke from entering the conveying pipe 21 from the inlet 13, causing smoke leakage and polluting the environment; the smoke baffle 6 is located at the end of the inlet 13 away from the conveying pipe 21, and the end of the smoke baffle 6 away from the horizontal plane is rotatably connected to the kiln body 1, that is, the rotation of the smoke baffle 6 is a rotational motion around the top end thereof, so that the glass raw material can push open the smoke baffle 6 and enter the interior of the kiln body 1 after contacting the smoke baffle 6 under the action of the conveying auger 22, and then the smoke baffle 6 will automatically reset under the action of gravity and re-cover the inlet 13, so that the inlet 13 has the function of automatic opening and automatic closing.

[0044] At the same time, the horizontal height of the feed inlet 13 should be lower than the horizontal height of each smoke exhaust port 12 so that the rising smoke will first enter the smoke exhaust port 12 and reduce the probability of smoke entering the feed inlet 13.

[0045] Each exhaust port 12 is provided with an anti-backflow hole 121 at one end close to the kiln body 1. The aperture of the anti-backflow hole 121 at one end close to the kiln body 1 is smaller than the aperture of the anti-backflow hole 121 at one end close to the smoke exhaust duct 11, that is, when the smoke inside the kiln body 1 enters the smoke exhaust duct 11 through the exhaust port 12, it enters along the hole with a continuously decreasing aperture, and the speed of the smoke entering the smoke exhaust duct 11 is increased by reducing the flow area. Due to the change in flow rate, the air pressure at one end of the exhaust port 12 close to the smoke exhaust duct 11 is lower than the air pressure at one end of the exhaust port 12 close to the kiln body 1, and the pressure difference between the smoke exhaust duct 11 and the kiln body 1 is combined to prevent the smoke inside the smoke exhaust duct 11 from flowing back into the kiln body 1.

[0046] like Figure 5 As shown, the kiln body 1 in this embodiment is provided with a baffle 14 inside, and each smoke exhaust port 12 is located between the baffle 14 and the smoke baffle 6. Through the physical barrier effect of the baffle 14, the smoke that rises and gathers at the top of the kiln body 1 is allowed to stay in the smoke exhaust area of ​​the kiln body 1, preventing the smoke from flowing along the inside of the kiln body 1 and affecting the smoke exhaust efficiency of the kiln body 1; the baffle 14 is integrally formed with the kiln body 1, that is, the baffle 14 is also made of high temperature resistant materials such as refractory bricks, thereby ensuring the service life of the baffle 14.

[0047] like Figure 6 , Figure 8 As shown, a plurality of filter plates 7 are provided in the smoke exhaust duct 11 in this embodiment, and the high-temperature gas entering the smoke exhaust duct 11 is filtered by the filter plates 7, so as to reduce the particle adhesion rate of the high-temperature gas entering the first fluid pipe 511, thereby reducing the probability of blockage of the waste heat recovery device 5, and ensuring the practicality of this embodiment. Each filter plate 7 is arranged at intervals in the smoke exhaust duct 11, and adjacent filter plates 7 are respectively located on both sides of the radial surface of the smoke exhaust port 12, that is, through the mutual cooperation of each filter plate 7, the internal channel of the smoke exhaust duct 11 is in the shape of a serpentine line of an "S"-shaped structure, which not only increases the number of contacts between the smoke and the filter plate 7; but also increases the turbulent effect of the smoke flow to a certain extent, which is conducive to the deposition and separation of particulate matter in the smoke. The two effects are combined with each other to fully improve the filtering effect of the embodiment on the smoke.

[0048] The filter plate 7 in the present embodiment is preferably a ceramic filter plate or other filter plate with high temperature resistance and corrosion resistance, which ensures the filtering effect while being hardly affected by high temperature and particulate matter, thus fully ensuring the service life of each filter plate 7 in the present embodiment.

[0049] The smoke exhaust duct 11 is provided with a plurality of cleaning ports 111, which are convenient for the staff to clean the inside of the smoke exhaust duct 11 and the filter plate 7, or to replace the filter plate 7; each cleaning port 111 is provided with a cover plate 8, and the cleaning port 111 is closed by the cover plate 8 to prevent smoke from leaking out of the cleaning port 111 when the smoke exhaust duct 11 is working; each cover plate 8 is fixedly connected to one end of the smoke exhaust duct 11 close to the horizontal plane, that is, each cover plate 8 and each cleaning port 111 are opened at the bottom of the smoke exhaust duct 11, and by virtue of the principle of high-temperature gas floating, each cleaning port 111 and each cover plate 8 located at the bottom can avoid contact with most of the gas inside the smoke exhaust duct 11; at the same time, each cover plate 8 and each cleaning port 111 are provided with a fixed sealing structure 9, and the fixed sealing structure 9 and the positional advantages of each cleaning port 111 can prevent the smoke in the smoke exhaust duct 11 from leaking out of the gap between the cover plate 8 and the cleaning port 111 when the cover plate 8 closes the cleaning port 111, thereby ensuring the sealing performance of this embodiment.

[0050] At the same time, since a cleaning port 111 is provided at the bottom of the smoke exhaust duct 11, the two sides of each filter plate 7 are fixedly connected to the two sides of the smoke exhaust duct 11 respectively to prevent the installation position of the filter plate 7 from interfering with the cleaning port 111, which would cause the connection performance of the filter plate 7 to deteriorate. The filter plate 7 in this embodiment should preferably be fixedly connected to the smoke exhaust duct 11 by means of threaded parts such as bolts, which not only facilitates the assembly and disassembly of the filter plate 7, but also ensures the connection stability of the filter plate 7.

[0051] like Figure 6-7 , Fig. 9 As shown, the fixed sealing structure 9 in this embodiment includes a plurality of fixing holes 92, a plurality of fixing members 93, and a plurality of first sealing gaskets 94. Each fixing hole 92 is opened on the smoke exhaust duct 11, and each fixing hole 92 is opened at one end of the smoke exhaust duct 11 close to the horizontal plane, that is, the fixing hole 92 itself does not directly penetrate the smoke exhaust duct 11, so as to prevent the smoke in the smoke exhaust duct 11 from leaking out along the fixing hole 92; each cover plate 8 is provided with a plurality of connecting holes 91, and each connecting hole 91 corresponds to each fixing hole 92 one by one, and each fixing member 93 is threadedly connected to each fixing hole 92 and the connecting member one by one. The hole 91, that is, the fixed sealing structure 9 adopts a threaded connection method to fix the cover plate 8 in the cleaning port 111, which not only ensures the reliability of the cover plate 8 being fixed on the smoke exhaust duct 11, but also facilitates the disassembly and assembly of the cover plate 8, and also ensures the sealing performance among the fixing member 93, the fixing hole 92 and the connecting hole 91; each first sealing gasket 94 is located one by one between each fixing member 93 and the connecting hole 91, and the first sealing gasket 94 plays the role of covering the connecting gap between the fixing member 93 and the connecting hole 91, thereby improving the overall sealing effect of the fixed sealing structure 9.

[0052] The fixing member 93 in this embodiment preferably has a threaded member such as a combination bolt that can abut against the fixed object, so as to facilitate clamping the first sealing gasket 94 between the nut and the cover plate 8. While fixing the cover plate 8, the first sealing gasket 94 can also be fixed, thus killing two birds with one stone.

[0053] The longitudinal section of each cover plate 8 is an inverted "T"-shaped structure. Each cover plate 8 includes an abutment body 81 and a connecting plate body 82. The abutment body 81 and the connecting plate body 82 are integrally formed to ensure the overall strength of the cover plate 8 itself. The abutment body 81 is engaged with the cleaning port 111, and each connecting hole 91 is provided on the connecting plate body 82. The connecting plate body 82 is fixedly connected to the smoke exhaust duct 11, and the smoke exhaust duct 11 should also be provided with an engagement groove for the connecting plate body 82 to be embedded. Through the "T"-shaped design feature, a larger contact area is formed between the cover plate 8 and the cleaning port 111, making the cover plate 8 more firmly fixed, and can effectively prevent the cover plate 8 from moving or loosening during use. In addition, the cover plate 8 with a "T"-shaped structure is The mutual fit between the cleaning port 111 can achieve a tight connection between the cover plate 8 and the cleaning port 111, thereby improving the sealing between the cover plate 8 and the cleaning port 111; at the same time, a second sealing gasket 95 is provided between the connecting plate body 82 and the smoke exhaust duct 11, and the second sealing gasket 95 is located between the cleaning port 111 and the connecting plate body 82. Through the "T"-shaped structural characteristics of the second sealing gasket 95, the first sealing gasket 94, and the cover plate 8, the sealing performance between the cover plate 8 and the cleaning port 111 is fully guaranteed.

[0054] In summary, a glass melting method can be obtained, which is as follows:

[0055] 1. When the kiln body 1 melts glass for the first time, the glass raw materials are put into the conveying pipe 21, and the conveying auger 22 is used to convey the glass raw materials into the kiln body 1. At the same time, the heating electrode 3 inside the conveying pipe 21 is started to heat the heating electrode 3 to provide temperature for the glass raw materials, realize the preheating of the glass raw materials, drive out the gas and moisture in the glass raw materials, and reduce the possibility of bubbles in the melting process. This helps to improve the quality of glass products and reduce defects and impurities.

[0056] Second, the glass raw materials inside the kiln body 1 are burned by the burner 4 to be melted into glass melt, thus completing the glass melting work.

[0057] 3. The heat in the flue gas generated by melting glass is recovered through the waste heat recovery device 5, and the heat is transported to the delivery pipe 21. In combination with the temperature generated by the original heating electrode 3 inside the delivery pipe 21, the speed of preheating the glass raw materials is increased, the glass production efficiency is improved, and the heat consumed during smoke exhaust is avoided from being wasted.

[0058] Fourth, the conveying pipe 21 continues to maintain the conveying work, continuously provides glass raw materials to the kiln body 1, keeps the kiln body 1 in working state, and makes the waste heat recovery device 5 continuously recover the waste heat of the flue gas, thereby providing heat for the conveying pipe 21, realizing the preheating of the glass raw materials, and completing the end-to-end connection.

[0059] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A glass melting furnace, comprising a kiln body (1), a heating device, and a conveying device (2) for feeding the kiln body (1), wherein the heating device comprises a plurality of heating electrodes (3) and a plurality of burners (4), characterized in that: The kiln body (1) is provided with a smoke exhaust duct (11), and a plurality of smoke exhaust ports (12) are provided between the smoke exhaust duct (11) and the kiln body (1) for connecting the two. The conveying device (2) comprises a conveying pipe (21), a conveying auger (22), and a conveying motor (23); each of the heating electrodes (3) is located in the conveying pipe (21); the conveying auger (22) is rotatably connected to the inside of the conveying pipe (21), and the conveying auger (22) and the output shaft of the conveying motor (23) are linked; the conveying pipe (21) is communicated with the kiln body (1); and a waste heat recovery device (5) is provided between the smoke exhaust duct (11) and the conveying pipe (21); The waste heat recovery device (5) comprises a heat exchanger (51) and a fan (52); the heat exchanger (51) comprises a first fluid pipe (511) and a second fluid pipe (512); the first fluid pipe (511) is connected to the smoke exhaust duct (11); and the second fluid pipe (512) is connected to the air outlet of the fan (52) and the delivery pipe (21).

2. The glass melting furnace according to claim 1, characterized in that: Both sides of the kiln body (1) are provided with a smoke exhaust duct (11), a waste heat recovery device (5), and a plurality of smoke exhaust ports (12); the delivery pipe (21) has a plurality of preheating ports (211) for connecting the second fluid pipes (512) to the delivery pipe (21); the preheating ports (211) are symmetrically distributed with the delivery pipe (21) as the center, and there are connecting channels (212) between the preheating ports (211).

3. The glass melting furnace according to claim 2, characterized in that: The kiln body (1) has an inlet (13) for communicating with a conveying pipe (21), and the inlet (13) is provided with a smoke baffle (6). The smoke baffle (6) is located at an end of the inlet (13) away from the conveying pipe (21), and an end of the smoke baffle (6) away from the horizontal plane is rotatably connected to the kiln body (1).

4. The glass melting furnace according to claim 3, characterized in that: An anti-backflow hole (121) is provided at one end of each smoke exhaust port (12) close to the kiln body (1), and the hole diameter of the anti-backflow hole (121) close to the kiln body (1) is smaller than the hole diameter of the anti-backflow hole (121) close to the smoke exhaust duct (11).

5. The glass melting furnace according to claim 4, characterized in that: A plurality of filter plates (7) are arranged in the smoke exhaust duct (11), each of the filter plates (7) is fixedly connected to the smoke exhaust duct (11), and each of the filter plates (7) is arranged at intervals in the smoke exhaust duct (11), and adjacent filter plates (7) are respectively located on both sides of the radial surface of the smoke exhaust port (12).

6. The glass melting furnace according to claim 5, characterized in that: The smoke exhaust duct (11) is provided with a plurality of cleaning ports (111), each of the cleaning ports (111) is provided with a cover plate (8), each of the cover plates (8) is fixedly connected to one end of the smoke exhaust duct (11) close to the horizontal plane, and a fixed sealing structure (9) is provided between each cover plate (8) and each cleaning port (111).

7. The glass melting furnace according to claim 6, characterized in that: The fixed sealing structure (9) comprises a plurality of fixing holes (92), a plurality of fixing parts (93), and a plurality of first sealing gaskets (94); each of the fixing holes (92) is opened on the smoke exhaust duct (11), and each of the fixing holes (92) is opened at one end of the smoke exhaust duct (11) close to the horizontal plane; each of the cover plates (8) is provided with a plurality of connecting holes (91), and each of the connecting holes (91) corresponds to each of the fixing holes (92) one by one; each of the fixing parts (93) is threadedly connected to each of the fixing holes (92) and the connecting holes (91) one by one; and each of the first sealing gaskets (94) is located between each of the fixing parts (93) and the connecting holes (91) one by one.

8. The glass melting furnace according to claim 7, characterized in that: The longitudinal section of each of the cover plates (8) is an inverted "T"-shaped structure. Each of the cover plates (8) comprises an abutment body (81) and a connecting plate body (82). Each of the connecting holes (91) is provided on the connecting plate body (82). The connecting plate body (82) is fixedly connected to the smoke exhaust duct (11), and a second sealing gasket (95) is provided between the connecting plate body (82) and the smoke exhaust duct (11).

9. The glass melting furnace according to claim 3 or 4, characterized in that: A baffle plate (14) is provided inside the kiln body (1), each of the smoke exhaust ports (12) is located between the baffle plate (14) and the smoke baffle plate (6), and the baffle plate (14) and the kiln body (1) are integrally formed.

10. A glass melting method applied to a glass melting furnace as claimed in any one of claims 1 to 9, characterized in that: One: When the kiln body (1) melts glass for the first time, the glass raw materials are put into the conveying pipe (21), and the conveying auger (22) is used to convey the glass raw materials into the kiln body (1), and the heating electrode (3) inside the conveying pipe (21) is used to preheat the glass raw materials; Second, the glass raw materials are melted in the kiln body (1) by means of the burner (4); Third, the heat in the flue gas generated by melting glass is recovered through the waste heat recovery device (5), and the heat is transported to the conveying pipe (21) to provide heat for the glass raw materials inside the conveying pipe (21); Fourthly, the conveying pipe (21) continues to maintain the conveying operation and continuously provides glass raw materials to the kiln body (1).

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