Glass furnace discharge apparatus

Abstract

The utility model discloses a glass kiln unloading device relates to the field of glass production, and this device includes bottom brick and unloading flow control device, bottom brick sets up at the bottom position of kiln, is set up with passageway on bottom brick, the inside of kiln is communicated with passageway, unloading flow control device sets up in passageway, and the inner wall of bottom brick is attached to the outer wall of unloading flow control device and is the cylindrical structure, the bottom opening of unloading flow control device is provided with the plugging device, and the flow rate of glass can be controlled through unloading flow control device.

Description

Technical Field

[0001] This utility model relates to the field of glass production, and in particular to a glass kiln unloading device. Background Technology

[0002] Glass furnaces are the core thermal equipment in glass production. During operation, a certain amount of molten glass accumulates at the bottom of the furnace. For process control (such as removing impurities, adjusting the liquid level, or changing glass types) or furnace maintenance (such as venting for cold repair), this portion of molten glass must be safely and controllably discharged from the bottom of the furnace. Therefore, the unloading device is an indispensable and crucial component of a glass furnace.

[0003] Traditional unloading devices mostly use mechanical valves or high-temperature resistant ceramic structures, but they have significant drawbacks under long-term corrosion from high-temperature molten glass (usually >1400℃): mechanical valves are prone to sealing failure due to thermal expansion and deformation at high temperatures, leading to leakage or air infiltration and disrupting the reducing atmosphere inside the furnace; although ceramic structures are resistant to high temperatures, they have poor thermal shock stability and are prone to cracking with frequent opening and closing; the viscosity of molten glass is highly sensitive to temperature, and traditional devices lack precise viscosity control methods, resulting in large fluctuations in unloading volume and affecting the stability of the forming process; when the furnace is shut down for cooling, residual molten glass solidifies and easily adheres firmly to the inner wall of the unloading channel, requiring manual knocking or high-temperature melting for cleaning, which is inefficient and damages the refractory material; existing unloading devices mostly use single-layer refractory brick channels, and the concentration of thermal stress easily leads to brick spalling; if metal components are embedded, they are prone to oxidation and short circuits at high temperatures or deformation due to incompatibility with the expansion coefficient of the refractory material.

[0004] In recent years, there have been attempts to introduce electric heating elements into the unloading port, but the following limitations exist: the heating element is in direct contact with the refractory material, which poses a high risk of insulation failure; the lack of thermal expansion buffer design makes the structure prone to cracking under long-term thermal cycling; and the inability to achieve integrated and precise control of unloading opening and closing and flow rate.

[0005] Therefore, there is an urgent need for a discharge device that combines high-temperature sealing, thermal shock resistance, precise flow control, and prevention of solid blockage, in order to improve the reliability and intelligence level of glass furnace operation. Utility Model Content

[0006] This utility model provides a glass furnace unloading device, comprising:

[0007] A bottom brick is placed at the bottom of the kiln and has a channel that connects to the interior of the kiln.

[0008] A discharge flow control device is installed in the channel. The outer wall of the discharge flow control device is attached to the inner wall of the bottom brick and has a cylindrical structure. A material blocking device is provided at the bottom opening of the discharge flow control device.

[0009] Preferably, in this embodiment of the application, the bottom brick includes a kiln bottom paving brick and a kiln bottom secondary layer brick, the kiln bottom paving brick and the kiln bottom secondary layer brick are arranged sequentially from top to bottom, and the unloading flow control device passes through the kiln bottom secondary layer brick.

[0010] Preferably, in this embodiment of the application, the unloading flow control device includes:

[0011] A top plate is disposed within the bottom bricks, and the top plate is disposed horizontally within the bottom bricks.

[0012] A cylindrical body is positioned below the top plate and is vertically arranged within the bottom bricks. The top plate and the cylindrical body are vertically provided with through slots that connect to the interior of the kiln.

[0013] A fixing element is provided on the cylinder body, and the cylinder body is fixed to the bottom brick by the fixing element.

[0014] Preferably, in this embodiment of the application, the top plate is horizontally positioned between the bottom paving bricks of the kiln and the second-layer bricks of the kiln bottom, and the top plate is sandwiched between the bottom paving bricks of the kiln bottom and the second-layer bricks of the kiln bottom.

[0015] Preferably, in this embodiment of the application, the cylinder includes an inner cylinder and an outer cylinder, the outer cylinder is disposed at the periphery of the inner cylinder, a fixed cavity is formed between the inner cylinder and the outer cylinder, the fixed cavity is filled with supporting material, and the through groove is formed in the inner cylinder.

[0016] Preferably, in this embodiment of the application, the fastener includes an inner flange and an outer flange, the inner flange being disposed below the bottom layer of bricks in the kiln, and the inner flange being disposed on the inner cylinder;

[0017] The outer flange is located at one end of the cylinder away from the top plate. The outer flange is located on the outer cylinder, and the side of the outer flange near the bottom layer bricks of the kiln is attached and fixed to the bottom layer bricks of the kiln.

[0018] Preferably, in this embodiment of the application, the lower end of the inner cylinder extends to a mounting plane below the inner flange.

[0019] Preferably, in this embodiment of the application, an annular expansion joint of 0.5mm to 5mm is reserved between the inner cylinder, the outer cylinder and the supporting material.

[0020] Preferably, in this embodiment of the application, the annular expansion joint is set to 1mm to 2mm.

[0021] Preferably, in this embodiment of the application, the blocking device includes a blocking component, which is disposed at one end of the inner cylinder and blocks the through groove.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0023] 1. The cylinder has a double-layer structure (inner cylinder / outer cylinder) + annular expansion joint (0.5mm–5mm) design, which actively absorbs thermal expansion stress and avoids sealing failure caused by high temperature deformation;

[0024] 2. The lower end of the inner cylinder extends below the flange plane, and combined with the plug fitting structure, it forms a double sealing barrier of physical and thermal expansion, eliminating the risk of material leakage;

[0025] 3. When the furnace is shut down, the remaining glass solidifies and is heated to the softening point (600℃). The adhered solids will automatically fall off under gravity, eliminating the need for manual cleaning after furnace shutdown. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 A cross-sectional structural diagram of a glass kiln unloading device in conjunction with bottom bricks provided by this utility model;

[0028] Figure 2 A cross-sectional view of a glass furnace unloading device provided by this utility model. Figure 2 ;

[0029] Figure 3 A cross-sectional view of a glass kiln unloading device provided by this utility model. Figure 2 ;

[0030] Figure 4 This is a schematic diagram of the overall structure of a glass kiln unloading device provided by this utility model.

[0031] Explanation of reference numerals in the attached figures:

[0032] 100. Bottom brick; 110. Channel; 120. Kiln bottom paving brick; 130. Kiln bottom secondary layer brick; 200. Discharge flow control device; 210. Top plate; 220. Cylinder; 221. Inner cylinder; 222. Outer cylinder; 223. Fixed cavity; 230. Through groove; 240. Fastener; 241. Inner flange; 242. Outer flange; 250. Support material; 300. Blocking device. Detailed Implementation

[0033] The specific embodiments of this utility model are described in detail below, but it should be understood that the protection scope of this utility model is not limited to the specific embodiments.

[0034] like Figures 1-4 As shown in the figure, an embodiment of the present invention provides a glass furnace unloading device, including a bottom brick 100 and an unloading flow control device 200. The unloading flow control device 200 is disposed inside the bottom brick 100, which is located at the bottom of the furnace. A channel 110 is provided on the bottom brick 100, which is vertically arranged and connects to the interior of the furnace, facilitating the discharge of materials inside the furnace through the channel 110. The unloading flow control device 200 is vertically arranged inside the channel 110, and the outer wall of the unloading flow control device 200 is tightly fitted to the inner wall of the bottom brick 100. In this embodiment, the unloading flow control device 200 has a cylindrical structure. The material blocking device 300 provided at the bottom of the unloading flow control device 200 can ensure the stability and sealing of the device under high temperature conditions.

[0035] In this embodiment, the bottom brick 100 is made of high-temperature resistant refractory material, which can withstand the high-temperature environment inside the kiln while maintaining the integrity and stability of the structure.

[0036] Specifically, in this embodiment of the application, the bottom brick 100 includes a kiln bottom paving brick 120 and a kiln bottom secondary layer brick 130, which are arranged sequentially from top to bottom, and the unloading flow control device 200 passes through the kiln bottom paving brick 120 and the kiln bottom secondary layer brick 130.

[0037] In the above structure, preferably, the unloading flow control device 200 is installed in the bottom secondary layer bricks 130 of the kiln, and the top of the unloading flow control device 200 abuts against the bottom paving bricks 120 of the kiln.

[0038] Furthermore, in this embodiment of the application, the unloading flow control device 200 mainly includes a top plate 210 and a cylinder 220. The top plate 210 is located at the top of the cylinder 220 and is horizontally positioned at the top of the cylinder 220. The cylinder 220 is vertically positioned in the bottom brick 100. Both the top plate 210 and the cylinder 220 are vertically provided with through grooves 230. The through grooves 230 extend from the top of the top plate 210 and the top of the cylinder 220 to the bottom. The through grooves 230 connect to the interior of the kiln, so that the material inside the kiln can be discharged through the through grooves 230.

[0039] In addition, in order to fix the discharge flow control device 200, a fixing member 240 is provided on the cylinder 220. The fixing member 240 firmly fixes the cylinder 220 to the bottom brick 100 to prevent the cylinder 220 from deforming or shifting in a high-temperature environment, thereby further ensuring the stability and sealing of the discharge flow control device 200.

[0040] In practice, the top plate 210 is located between the bottom paving bricks 120 and the second layer of bottom bricks 130 of the kiln, and is sandwiched between these two layers of bottom bricks 100. This design not only enhances the stability of the top plate 210, but also helps to improve the load-bearing capacity of the entire unloading flow control device 200.

[0041] It is worth noting that the cylinder 220 adopts a double-layer structure, including an inner cylinder 221 and an outer cylinder 222. A fixed cavity 223 is formed between the inner cylinder 221 and the outer cylinder 222. The outer cylinder 222 is located on the periphery of the inner cylinder 221. The fixed cavity 223 is filled with supporting material 250. This design not only enhances the structural strength of the cylinder 220, but also helps to improve the high-temperature resistance of the cylinder 220. At the same time, a through groove 230 is formed in the inner cylinder 221, allowing materials to pass through smoothly.

[0042] In the design of the fastener 240, this embodiment adopts a combination of inner flange 241 and outer flange 242. The inner flange 241 is installed on the inner cylinder 221 and located below the bottom secondary layer bricks 130 of the kiln; the outer flange 242 is installed on the outer cylinder 222 at one end away from the top plate 210. The side of the outer flange 242 closest to the bottom secondary layer bricks 130 of the kiln is fitted and fixed to the bottom secondary layer bricks 130. This design not only improves the stability of the fastener 240, but also helps to improve the sealing performance of the entire unloading flow control device 200.

[0043] To further improve the high-temperature resistance and sealing performance of the unloading flow control device 200, this embodiment extends the lower end of the inner cylinder 221 to a level below the mounting plane of the inner flange 241, and a 0.5mm to 5mm annular expansion joint is reserved between the inner cylinder 221, the outer cylinder 222, and the supporting material 250. The annular expansion joint helps alleviate the thermal expansion stress of the cylinder 220 under high-temperature conditions, preventing deformation or rupture. Simultaneously, the annular expansion joint also serves as a sealing gap, further improving the sealing performance of the unloading flow control device 200. In specific implementations, the width of the annular expansion joint can be set to 1mm to 2mm to achieve optimal high-temperature resistance and sealing effect.

[0044] At the bottom of the unloading flow control device 200, there is a blocking device 300. The blocking device 300 mainly includes a blocking component. In this application, the blocking component is located at one end of the inner cylinder 221. The end of the blocking component facing the inner cylinder 221 is fitted with the inner wall of the inner cylinder 221, so that Du Jian can block the through groove 230.

[0045] Preferably, in this embodiment of the application, the plug and the inner cylinder 221 are connected by a thread, and the plug can be installed or removed from the inner cylinder 221 by manual or mechanical operation.

[0046] Based on the above structure, the top plate 210, inner cylinder 221, outer cylinder 222, outer flange 242 and inner flange 241 are made of at least one precious metal or alloy of platinum, rhodium, palladium and iridium; the outer flange 242 and inner flange 241 are respectively connected to the two poles of the power supply to form a closed heating circuit.

[0047] In this embodiment, the support material 250 mainly includes an insulating support material 250, which has a certain insulating ability. This material can be mainly set as ceramic or mica to achieve the insulating function, so as to avoid the occurrence of short circuit between the inner cylinder 221 and the outer cylinder 222.

[0048] Based on the above structure, when unloading is required, the plug is first pushed out of the pipe. At this time, since the glass is solid and brittle, it easily comes out of the channel 230, making the operation simple and convenient. However, this also results in some glass solids sticking to the inner wall of the channel 230 during cooling. When the unloading flow control device 200 is energized, it acts as a conductor, generating Joule heating through a strong current. The heat generated heats the glass solids in the channel 230. Once the glass reaches its softening point, it will automatically flow down under the influence of gravity.

[0049] During the unloading process, the electrical power can be adjusted at any time to control the unloading flow rate by changing the viscosity of the molten glass, and the unloading volume can be stabilized by stabilizing the temperature. For precise control, a thermocouple can be installed between the inner cylinder 221 and the outer cylinder 222 to measure the temperature of the device itself. This allows for more intuitive control of the target and enables automatic control.

[0050] When unloading is no longer needed, power is turned off. As the temperature of the molten glass continues to decrease due to natural heat dissipation, the unloading volume gradually decreases as the viscosity of the molten glass increases, eventually tending to stop flowing. At this time, the bottom blocking device 300 is pushed into the channel 230 and reliably fixed to completely stop unloading.

[0051] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A glass furnace unloading device, characterized in that, include: A bottom brick is placed at the bottom of the kiln and has a channel that connects to the interior of the kiln. A discharge flow control device is installed in the channel. The outer wall of the discharge flow control device is attached to the inner wall of the bottom brick and has a cylindrical structure. A material blocking device is provided at the bottom opening of the discharge flow control device. The unloading flow control device includes a cylinder, which includes an inner cylinder and an outer cylinder. The outer cylinder is located around the inner cylinder. A fixed cavity is formed between the inner cylinder and the outer cylinder. The fixed cavity is filled with supporting material. A through groove is formed inside the inner cylinder. An annular expansion joint of 0.5mm to 5mm is reserved between the inner cylinder, the outer cylinder and the supporting material.

2. The glass furnace unloading device according to claim 1, characterized in that, The bottom bricks include kiln bottom paving bricks and kiln bottom secondary layer bricks, which are arranged sequentially from top to bottom. The unloading flow control device passes through the kiln bottom secondary layer bricks.

3. The glass furnace unloading device according to claim 2, characterized in that, The unloading flow control device includes: A top plate is disposed within the bottom bricks, and the top plate is disposed horizontally within the bottom bricks. A cylindrical body is positioned below the top plate and is vertically arranged within the bottom bricks. The top plate and the cylindrical body are vertically provided with through slots that connect to the interior of the kiln. A fixing element is provided on the cylinder body, and the cylinder body is fixed to the bottom brick by the fixing element.

4. The glass furnace unloading device according to claim 3, characterized in that, The top plate is positioned horizontally between the bottom paving bricks and the second-layer bricks of the kiln bottom, and is sandwiched between the bottom paving bricks and the second-layer bricks of the kiln bottom.

5. A glass furnace unloading device according to claim 3, characterized in that, The fastener includes an inner flange and an outer flange. The inner flange is located below the bottom layer of bricks in the kiln and is located on the inner cylinder. The outer flange is located at one end of the cylinder away from the top plate. The outer flange is located on the outer cylinder, and the side of the outer flange near the bottom layer bricks of the kiln is attached and fixed to the bottom layer bricks of the kiln.

6. A glass furnace unloading device according to claim 5, characterized in that, The lower end of the inner cylinder extends below the mounting plane of the inner flange.

7. The glass furnace unloading device according to claim 1, characterized in that, The annular expansion joint is set to 1mm to 2mm.

8. A glass furnace unloading device according to claim 1, characterized in that, The blocking device includes a blocking component, which is located at one end of the inner cylinder and blocks the through groove.

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