Glass melting furnace for preparing glass bottle

Abstract

A glass melting furnace for preparing glass bottles relates to the technical field of glass melting furnaces and comprises a melting furnace and a heat recoverer. The smelting furnace is provided with an opening, and the heat recoverer is connected with the opening in a sealed mode. A feeding area, a heating area, a homogenizing area and a cooling area are sequentially arranged in the smelting furnace in the direction of an assembly line, the depth of molten glass in the feeding area, the depth of molten glass in the heating area and the depth of molten glass in the cooling area are the same and are all lower than the depth of molten glass in the homogenizing area, and a feeding port is formed in the side wall of the feeding area of the smelting furnace. A material receiving platform is arranged in the feeding area and matched with the feeding port, and raw materials enter the smelting furnace from the feeding port, are melted on the material receiving platform and then flow into the bottom of the feeding area in the smelting furnace. The material receiving platform is arranged for buffering the added glass raw materials, and the glass raw materials are melted on the material receiving platform and then enter the molten glass in the melting furnace in the form of high-temperature molten glass, so that the condition of convection in the furnace is avoided, and the homogenizing and clarifying temperature of the molten glass in the melting tank is increased.

Description

Technical Field

[0001] The invention relates to the technical field of glass melting furnaces, in particular to a glass melting furnace for preparing glass bottles. Background Art

[0002] Glass melting furnace is the core equipment in the modern glass manufacturing process. It is mainly used to melt various raw materials (such as quartz sand, soda ash, limestone, etc.) into liquid glass at high temperature. The working principle of glass melting furnace is based on heating the raw materials until they reach the melting point and form uniform liquid glass. For traditional flame melting furnaces, the heat mainly comes from burning fossil fuels (such as natural gas, heavy oil, etc.), and the flame directly heats the raw materials in the furnace.

[0003] In existing flame furnaces, the distance between the glass liquid and the furnace top is generally between 2m and 3m. In the process of adding glass raw materials, the glass raw materials at room temperature are directly fed into the furnace through the feed port. The glass raw materials float on the high-temperature glass liquid. In the process of melting the glass raw materials, they will inevitably absorb a large amount of the temperature of the glass liquid, causing a certain temperature difference and density difference in the glass liquid, forming convection in the furnace, thereby reducing the homogenization and clarification temperature of the glass liquid in the melting pool. Summary of the invention

[0004] The present invention aims to solve the shortcomings existing in the background technology and provide a glass melting furnace for preparing glass bottles, which at least solves some of the technical problems in the prior art.

[0005] To achieve the above object, the present invention provides the following technical solutions: A glass melting furnace for preparing glass bottles, comprising a melting furnace and a heat recovery device, wherein the melting furnace is provided with an opening, and the heat recovery device is sealedly connected to the opening; The furnace is provided with a feeding zone, a heating zone, a homogenizing zone and a cooling zone in sequence along the direction of the assembly line. The glass liquid depths of the feeding zone, the heating zone and the cooling zone are the same and are all lower than the glass liquid depth of the homogenizing zone. A feeding port is provided on the side wall of the feeding zone of the furnace. A material receiving platform is provided in the feeding zone. The top surface of the material receiving platform is higher than the glass liquid level. The material receiving platform is in a pyramid shape or a trapezoidal shape that is narrow on the top and wide on the bottom. The material receiving platform is coordinated with the feeding port. The raw material enters the furnace from the feeding port and then melts on the material receiving platform and flows into the bottom of the feeding zone in the furnace.

[0006] Furthermore, the feed port is arranged on the side wall of the furnace, the distance between the feed port and the top of the material receiving platform is 0.8m-1.3m, the bottom of the material receiving platform is arranged on the bottom surface of the furnace, and the side of the material receiving platform is connected to the side below the feed port.

[0007] Furthermore, the material receiving platform is arranged in a stepped or trapezoidal shape, the highest point of the material receiving platform is arranged below the feed port, and the height of the material receiving platform is 1m-1.5m.

[0008] Furthermore, the material receiving platform is stepped, and the ratio of the width, length and height of the steps on the material receiving platform is (1-1.5): (1.8-2.7), and the width of the top platform of the material receiving platform is 60cm-80cm.

[0009] Furthermore, a baffle is provided on the material receiving platform, and a through groove is provided between the baffle and the material receiving platform.

[0010] Furthermore, the material receiving platform is in a trapezoidal shape, the top width of the material receiving platform is designed to be 60cm-80cm, and the angle between the slope of the material receiving platform and the horizontal plane is 15°-20°.

[0011] Further, the feed port is arranged on the top of the furnace, the distance between the feed port and the top of the connecting platform is 1.5m-2m, and the material receiving platform is arranged directly below the feed port; The material receiving platform is configured in a stepped pyramid shape or a sloped pyramid shape, and the height of the material receiving platform is 1m-1.5m.

[0012] Furthermore, the material receiving platform is in the shape of a stepped pyramid, and the ratio of the width, length and height of the steps on the material receiving platform is (1-1.5): (1.8-2.7), and the width and length of the top platform of the material receiving platform are 0.8m-1.2m, and the length is 1.2m-1.5m.

[0013] Furthermore, the material receiving platform is in the shape of a sloped pyramid, the width and length of the top platform of the material receiving platform are 0.8m-1.2m, the length is 1.2m-1.5m, and the angle between the slope of the material receiving platform and the horizontal plane is 15°-20°.

[0014] Beneficial effects of the present invention: (1) The present invention provides a receiving platform as a buffer for adding glass raw materials. After the glass raw materials are melted on the receiving platform, they enter the glass liquid in the melting furnace in the form of high-temperature glass liquid, thereby avoiding the convection in the furnace and increasing the homogenization and clarification temperature of the glass liquid in the melting pool. (2) The present invention can effectively prevent the glass raw materials from splashing directly into the glass liquid after entering the material receiving platform by arranging a baffle on the material receiving platform, and further avoid the convection in the furnace; (3) The present invention arranges the receiving platform in a stepped, trapezoidal or pyramidal shape, and adjusts the feeding speed of the feed inlet to more conveniently control the flow rate of the raw materials entering the molten glass, thereby controlling the depth of the molten glass. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of an embodiment of the present invention; Figure 2 This is a front view of a material receiving platform according to an embodiment of the present invention; Figure 3 for Figure 2 A top view of the center material receiving platform; Figure 4 This is a front view of a material receiving platform according to another embodiment of the present invention; Figure 5 for Figure 4 A top view of the center material receiving platform; Figure 6 This is a front view of a material receiving platform according to another embodiment of the present invention; Figure 7 for Figure 6 A top view of the center material receiving platform; Figure 8 This is a front view of a material receiving platform according to another embodiment of the present invention; Fig. 9 for Figure 8 Top view of the center loading platform.

[0016] In the figure, 1-furnace; 2-heat recovery device; 3-material receiving platform; 11- opening; 12- feeding zone; 13- heating zone; 14- homogenizing zone; 15- cooling zone; 16- feeding port; 31- baffle; 32- through slot. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings 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 those skilled in the art without creative work are within the scope of protection of the present invention.

[0018] The disclosure below provides many different embodiments or examples for implementing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numbers and / or reference letters in different examples. This repetition is for the purpose of simplicity and clarity, and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but a person of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0019] The basic working principle of the flame glass furnace is to use the high-speed gas sprayed from the burner and the combustion-supporting gas (usually air or pure oxygen) to mix and ignite the high-temperature flame to directly heat the glass raw materials in the furnace. As the temperature rises, the raw materials gradually soften and melt, and finally form a uniform liquid glass.

[0020] The whole process can be divided into several stages: silicate formation, glass formation, glass liquid clarification, glass liquid homogenization and glass liquid cooling. In order to ensure the smooth melting process, the combustion conditions must be precisely controlled, including the ratio of fuel to combustion-supporting gas, flame length, shape and heat distribution, etc., to achieve the ideal melting effect.

[0021] In the prior art, the glass melting pool of the existing flame glass melting furnace generally adopts a glass liquid depth of 2000 mm to 3000 mm. The added cold glass raw materials float on the high-temperature glass liquid. Since the cold glass raw materials absorb the heat of the glass liquid in the melting pool, the glass liquid in the melting pool forms a certain degree of temperature difference and density difference, thereby causing convection of the glass liquid in the melting pool. This convection greatly reduces the homogenization and clarification temperature of the glass liquid in the melting pool, thereby reducing the homogenization and clarification capacity of the furnace and increasing energy consumption.

[0022] In order to solve the above problems, Figure 1 As shown, this embodiment provides a glass melting furnace for preparing glass bottles, comprising a melting furnace 1 and a heat recovery device 2, wherein the melting furnace is provided with an opening 11, and the heat recovery device 2 is sealedly connected to the opening 11; The furnace 1 is provided with a feeding zone 12, a heating zone 13, a homogenizing zone 14 and a cooling zone 15 in sequence along the assembly line direction. The glass liquid depths of the feeding zone 12, the heating zone 13 and the cooling zone 15 are the same and are all lower than the glass liquid depth of the homogenizing zone 14. A feeding port 16 is provided on the side wall of the feeding zone 12 of the furnace 1. A receiving platform 3 is provided in the feeding zone 12. The top surface of the receiving platform 3 is higher than the glass liquid surface. The receiving platform 3 is in a pyramid shape or a trapezoidal shape that is narrow at the top and wide at the bottom. The receiving platform 3 is coordinated with the feeding port 16. The raw material enters the furnace 1 from the feeding port 16 and then melts on the receiving platform 3 before flowing into the bottom of the feeding zone 12 in the furnace 1.

[0023] It should be noted that the present furnace 1 preferably adopts an oxygen-enriched combustion or full oxygen combustion flame glass furnace, which can significantly improve combustion efficiency, reduce fuel consumption and pollutant emissions compared to traditional air-assisted combustion flame glass furnaces. Since the volume of smoke generated by full oxygen combustion is small, the structure of the heat storage system can also be simplified, making the furnace more compact and efficient.

[0024] Since the temperature in the melting furnace 1 is relatively high and the high-temperature glass liquid is somewhat corrosive, the inner wall of the melting furnace 1 and the receiving platform 3 are made of corundum bricks or silicon carbide bricks or other bricks with good high-temperature resistance and good thermal shock stability, corrosion resistance and mechanical strength.

[0025] During operation, the furnace 1 is preheated first. After the temperature in the furnace reaches the set temperature, the raw materials are fed into the receiving platform 3 in the furnace 1 through the feed port 16. After being melted at high temperature, the raw materials flow into the feed zone 12, the heating zone 13, the homogenization zone 14 and the cooling zone 15 in sequence at a certain speed to avoid the cold glass raw materials absorbing the heat of the glass liquid in the melting pool, causing the glass liquid in the melting pool to form a certain degree of temperature difference and density difference, thereby causing convection of the glass liquid in the melting pool. By controlling the feeding speed and the discharging speed, the distance between the glass liquid in the furnace 1 and the furnace top is controlled to be between 2.5m and 3m, which can further reduce the convection in the glass liquid.

[0026] In a further implementation of this embodiment, the feed port 16 is arranged on the side wall of the furnace 1, the distance between the feed port 16 and the top of the material receiving platform 3 is 0.8m-1.3m, the bottom of the material receiving platform 3 is arranged on the bottom surface of the furnace 1, and the side of the material receiving platform 3 is connected to the side below the feed port 16.

[0027] It should be noted that if the distance between the feed port 16 and the material receiving platform 3 is too short, it may cause material accumulation or blockage during transportation, thereby affecting the subsequent normal feeding. If it is too long, it is easy to generate more dust, especially fine particle materials after drying or crushing, which are easy to fly with the airflow and cause dust pollution. The bottom of the material receiving platform 3 is fixedly connected to the bottom surface of the feed area 12, so that the material receiving platform 3 is more stable as a whole.

[0028] In a further implementation of this embodiment, the material receiving platform 3 is arranged in a stepped or trapezoidal shape, the highest point of the material receiving platform 3 is arranged below the feed port 16, and the height of the material receiving platform 3 is 1m-1.5m.

[0029] It should be noted that: by setting the material receiving platform 3 to be in a stepped shape, because the material receiving platform 3 itself is made of refractory bricks such as corundum bricks or silicon carbide bricks, it is relatively simple to only use it as a stepped shape, and it can also achieve the goal of introducing the molten raw materials into the glass liquid in a high-temperature molten state at a certain speed. By setting the height of the material receiving platform 3 to 1m-1.5m, the raw materials can increase their temperature after melting and before flowing into the glass liquid for a certain period of time, thereby reducing the temperature difference between the incoming glass liquid and the original high-temperature molten glass liquid, and further avoiding convection.

[0030] In a further implementation of this embodiment, the material receiving platform 3 is stepped, and the ratio of the width to length to the height of the steps on the material receiving platform 3 is (1-1.5): (1.8-2.7), and the width of the top platform of the material receiving platform 3 is 60cm-80cm.

[0031] It should be noted that by controlling the width-to-length and height ratio of the receiving platform 3, the flow speed of the raw materials in a molten state on the receiving platform 3 can be effectively controlled to maintain a flow speed of at least 3 m / s and lower than 8 m / s. If the flow speed is too fast, the raw materials that enter quickly will bring in a large amount of air, which is easy to form bubbles. If the flow speed is too slow, the raw materials will stay on the surface for too long, causing local overheating or incomplete melting, which will also affect the performance of the product.

[0032] In a further implementation of this embodiment, a baffle 31 is provided on the material receiving platform 3, and a through groove 32 is provided between the baffle 31 and the material receiving platform 3. It should be noted that the baffle 31 can be provided to prevent the glass raw materials from splashing directly into the glass liquid after entering the material receiving platform, thereby further avoiding the convection in the furnace.

[0033] The raw materials falling from a high place will inevitably splash. The splashing raw materials are blocked by the baffle 31, and then leak out through the through groove 32 set between the baffle 31 and the material receiving platform 3. After being heated at high temperature, they are melted and flow into the glass liquid at a certain flow rate. Further setting the height of the baffle 31 to 20cm-25cm can have a better blocking effect, and setting the width of the through groove 32 between the baffle 31 and the material receiving platform 3 to 10cm-15cm can effectively ensure the flow rate of the molten raw material on the top of the material receiving platform 3.

[0034] In a further implementation of this embodiment, the material receiving platform 3 is trapezoidal in shape, the top width of the material receiving platform 3 is designed to be 60cm-80cm, and the angle between the slope of the material receiving platform 3 and the horizontal plane is 15°-20°.

[0035] It should be noted that by controlling the slope angle of the receiving platform 3, the flow rate of the raw materials in the molten state on the receiving platform 3 can be effectively controlled to maintain a flow rate of at least 3m / s and lower than 8m / s. If the flow rate is too fast, the raw materials entering quickly will bring in a lot of air, which is easy to form bubbles. If the flow rate is too slow, the raw materials will stay on the surface for too long, causing local overheating or incomplete melting, which will also affect the performance of the product. In a further implementation of this embodiment, the feed port is arranged on the top of the furnace, the distance between the feed port and the top of the connecting platform is 1.5m-2m, and the material receiving platform is arranged directly below the feed port; the material receiving platform is arranged in a stepped pyramid shape or a sloped pyramid shape, and the height of the material receiving platform is 1m-1.5m.

[0036] It should be noted that if the distance between the feed port 16 and the material receiving platform 3 is too short, it may cause material accumulation or blockage during transportation, thereby affecting the subsequent normal feeding. If it is too long, it is easy to generate more dust, especially fine particle materials after drying or crushing, which are easy to fly with the airflow and cause dust pollution. The bottom of the material receiving platform 3 is fixedly connected to the bottom surface of the feed area 12, so that the material receiving platform 3 is more stable as a whole.

[0037] In a further implementation of this embodiment, the material receiving platform is in the shape of a stepped pyramid, and the ratio of the width, length and height of the steps on the material receiving platform is (1-1.5): (1.8-2.7), and the width and length of the top platform of the material receiving platform are 0.8m-1.2m, and the length is 1.2m-1.5m.

[0038] It should be noted that by controlling the width-to-length and height ratio of the receiving platform 3, the flow speed of the raw materials in a molten state on the receiving platform 3 can be effectively controlled to maintain a flow speed of at least 3 m / s and lower than 8 m / s. If the flow speed is too fast, the raw materials that enter quickly will bring in a large amount of air, which is easy to form bubbles. If the flow speed is too slow, the raw materials will stay on the surface for too long, causing local overheating or incomplete melting, which will also affect the performance of the product.

[0039] In a further implementation of this embodiment, a baffle 31 is provided on the material receiving platform 3, and a through groove 32 is provided between the baffle 31 and the material receiving platform 3. The material receiving platform is in the shape of a sloped pyramid, and the width and length of the top platform of the material receiving platform are 0.8m-1.2m, and the length is 1.2m-1.5m. The angle between the slope of the material receiving platform and the horizontal plane is 15°-20°.

[0040] It should be noted that the baffle 31 can be provided to prevent the glass raw materials from splashing directly into the glass liquid after entering the receiving platform, thereby further preventing the convection in the furnace.

[0041] The raw materials falling from a high place will inevitably splash. The splashing raw materials are blocked by the baffle 31, and then leak out through the through groove 32 set between the baffle 31 and the material receiving platform 3. After being heated at high temperature, they are melted and flow into the glass liquid at a certain flow rate. Further setting the height of the baffle 31 to 20cm-25cm can have a better blocking effect, and setting the width of the through groove 32 between the baffle 31 and the material receiving platform 3 to 10cm-15cm can effectively ensure the flow rate of the molten raw material on the top of the material receiving platform 3.

[0042] By controlling the slope angle of the receiving platform 3, the flow speed of the raw materials in a molten state on the receiving platform 3 can be effectively controlled to maintain a flow speed of at least 3 m / s and lower than 8 m / s. If the flow speed is too fast, the raw materials that enter quickly will bring in a large amount of air, which is easy to form bubbles. If the flow speed is too slow, the raw materials will stay on the surface for too long, causing local overheating or incomplete melting, which will also affect the performance of the product.

[0043] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of the above disclosed technical contents without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A glass melting furnace for preparing glass bottles, characterized in that: It comprises a furnace and a heat recovery device, wherein the furnace is provided with an opening, and the heat recovery device is sealed and connected with the opening; The furnace is provided with a feeding zone, a heating zone, a homogenizing zone and a cooling zone in sequence along the direction of the assembly line. The glass liquid depths of the feeding zone, the heating zone and the cooling zone are the same and are all lower than the glass liquid depth of the homogenizing zone. A feeding port is provided on the side wall of the feeding zone of the furnace. A material receiving platform is provided in the feeding zone. The top surface of the material receiving platform is higher than the glass liquid level. The material receiving platform is in a pyramid shape or a trapezoidal shape that is narrow on the top and wide on the bottom. The material receiving platform is coordinated with the feeding port. The raw material enters the furnace from the feeding port and then melts on the material receiving platform and flows into the bottom of the feeding zone in the furnace.

2. The glass melting furnace for preparing glass bottles according to claim 1, characterized in that: The feed port is arranged on the side wall of the furnace, the distance between the feed port and the top of the material receiving platform is 0.8m-1.3m, the bottom of the material receiving platform is arranged on the bottom surface of the furnace, and the side of the material receiving platform is connected to the side below the feed port.

3. The glass melting furnace for preparing glass bottles according to claim 2, characterized in that: The material receiving platform is arranged in a stepped or trapezoidal shape, the highest point of the material receiving platform is arranged below the feed port, and the height of the material receiving platform is 1m-1.5m.

4. The glass melting furnace for preparing glass bottles according to claim 3, characterized in that: The material receiving platform is stepped, and the ratio of the width, length and height of the steps on the material receiving platform is (1-1.5): (1.8-2.7), and the width of the top platform of the material receiving platform is 60cm-80cm.

5. The glass melting furnace for preparing glass bottles according to claim 4, characterized in that: The material receiving platform is provided with a baffle, and a through groove is provided between the baffle and the material receiving platform.

6. The glass melting furnace for preparing glass bottles according to claim 3, characterized in that: The material receiving platform is in a trapezoidal shape, the top width of the material receiving platform is designed to be 60cm-80cm, and the angle between the slope of the material receiving platform and the horizontal plane is 15°-20°.

7. The glass melting furnace for preparing glass bottles according to claim 1, characterized in that: The feed inlet is arranged on the top of the furnace, the distance between the feed inlet and the top of the connecting platform is 1.5m-2m, and the material receiving platform is arranged directly below the feed inlet; The material receiving platform is configured in a stepped pyramid shape or a sloped pyramid shape, and the height of the material receiving platform is 1m-1.5m.

8. The preparation of the glass bottle according to claim 7, characterized in that: The material receiving platform is in the shape of a stepped pyramid, and the ratio of the width, length and height of the steps on the material receiving platform is (1-1.5): (1.8-2.7). The width and length of the top platform of the material receiving platform are 0.8m-1.2m, and the length is 1.2m-1.5m.

9. The preparation of the glass bottle according to claim 8, characterized in that: The material receiving platform is provided with a baffle, and a through groove is provided between the baffle and the material receiving platform.

10. The preparation of the glass bottle according to claim 7, characterized in that: The material receiving platform is in the shape of a sloped pyramid, the width and length of the top platform of the material receiving platform are 0.8m-1.2m, the length is 1.2m-1.5m, and the angle between the slope of the material receiving platform and the horizontal plane is 15°-20°.

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