An integrated electrode bubbling device for a glass fining tank

Abstract

The utility model discloses an integrated electrode bubbling device for glass clarifying pool, including bottom plate, the surface center position department of bottom plate is installed with support rod, and the top plate of support rod is installed with clarifying pool body, and the inside installation of clarifying pool body has compound electrode subassembly, and the surface one side of bottom plate is installed with liquid inlet pump, and the output of liquid inlet pump is communicated with clarifying pool body through liquid inlet pipeline, the utility model discloses electrode and bubble tube function combine two as one, has simplified clarifying pool bottom structure, has saved the installation space, has reduced the manufacturing cost and complexity of equipment, has reduced the pool wall opening and sealing point, has fundamentally reduced the risk of glass liquid leakage and air invasion, has improved the security and stability of kiln operation.

Description

Technical Field

[0001] This utility model belongs to the technical field of glass processing, specifically relating to an integrated electrode bubbling device for glass clarification tanks. Background Technology

[0002] In the glass manufacturing process, clarification is a crucial step, the purpose of which is to remove air bubbles from the molten glass. The clarification tank usually employs two independent systems: one is an electrode heating system, which uses electrodes inserted into the molten glass to heat it and maintain its temperature and fluidity; the other is a bubbling system, which introduces an inert gas (such as nitrogen) into the molten glass through a bubbling tube at the bottom of the tank, using the rising process of the bubbles to carry away and eliminate small air bubbles in the molten glass.

[0003] Traditionally, the electrode and bubbling tube systems are installed independently, requiring their own space and sealing structure. This results in a crowded layout at the bottom of the clarifier, a complex structural design, and increased manufacturing costs and maintenance difficulty.

[0004] The electrodes and bubbling tubes need to pass through the pool wall, forming multiple high-temperature sealing points, which increases the risk of glass melt leakage and air infiltration, affecting the safety of the furnace and the quality of the glass.

[0005] Thermal efficiency and bubbling effect are limited. Independent bubbling tubes do not generate heat themselves, which may cause uneven temperature distribution in the glass melt and affect the stability of the bubbling effect.

[0006] Molybdenum electrodes are prone to oxidation and damage. As the core heating element, the part of the molybdenum electrode exposed to the air layer of the kiln is easily oxidized at high temperatures, resulting in electrode ablation, thinning, and a significantly shortened lifespan. Therefore, we propose an integrated electrode bubbling device for glass clarification tanks. Utility Model Content

[0007] The purpose of this invention is to provide an integrated electrode bubbling device for glass clarification tanks to solve the problem of poor bubbling effect mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: an integrated electrode bubbling device for a glass clarification tank, comprising a base plate; a support rod is installed at the center of the surface of the base plate, a clarification tank body is installed on the top plate of the support rod, a composite electrode assembly is installed inside the clarification tank body, and an inlet pump is installed on one side of the surface of the base plate, the output end of the inlet pump being connected to the clarification tank body through an inlet pipe.

[0009] Preferably, the composite electrode assembly includes a molybdenum electrode, a stainless steel electrode is disposed below the molybdenum electrode, and a water-cooling jacket is sleeved on the outside of the stainless steel electrode.

[0010] Preferably, a nitrogen pipeline is provided at the internal middle position of the molybdenum electrode and the stainless steel electrode.

[0011] Preferably, a water inlet pipe is installed on one side of the lower surface of the water-cooling jacket, and a water outlet pipe is installed on the other side of the lower surface of the water-cooling jacket.

[0012] Preferably, a circuit board is mounted on the bottom of the stainless steel electrode, and a terminal block is mounted on the bottom of the circuit board, with wires mounted on the terminal block.

[0013] Preferably, the outlet end of the nitrogen pipeline has a porous diffusion structure, and the outlet end is located in the electric field interaction region between the molybdenum electrode and the stainless steel electrode.

[0014] Preferably, the water cooling jacket is made of stainless steel, and a spiral water flow channel is machined inside the jacket wall.

[0015] Preferably, the inner wall of the clarification tank is lined with a high-temperature refractory insulating material layer, and one end of the liquid inlet pipe extending into the clarification tank is made of a platinum-rhodium alloy resistant to glass melt corrosion.

[0016] Compared with the prior art, this utility model provides an integrated electrode bubbling device for glass clarification tanks, which has the following beneficial effects:

[0017] 1. By combining the functions of the electrode and the bubbling tube into one, the bottom structure of the clarification tank is simplified, installation space is saved, and the manufacturing cost and complexity of the equipment are reduced; the number of openings and sealing points in the tank wall is reduced, which fundamentally reduces the risk of glass melt leakage and air intrusion, and improves the safety and stability of the kiln operation.

[0018] 2. The stainless steel electrode is forcibly cooled by a water-cooling device, which indirectly and effectively protects the expensive molybdenum electrode from high-temperature oxidation and extends its lifespan several times over. The bubbling gas flows directly through the high-temperature molybdenum electrode and can be preheated, making the bubbling more stable. Bubbling and heating occur at the same location, which helps to form a more ideal thermal and flow field distribution, improves clarification efficiency and glass melt homogenization effect. The upper and lower electrodes are connected by threads, which facilitates disassembly and replacement, reducing maintenance costs and downtime. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a bottom view of the clarification tank of this utility model;

[0021] Figure 3 This is a schematic diagram of the composite electrode assembly of this utility model;

[0022] Figure 4This is a cross-sectional view of the composite electrode assembly of this utility model.

[0023] In the diagram: 1. Base plate; 2. Inlet pump; 3. Inlet pipe; 4. Clarification tank body; 5. Support rod; 6. Composite electrode assembly; 61. Molybdenum electrode; 62. Water cooling jacket; 63. Stainless steel electrode; 64. Inlet pipe; 65. Outlet pipe; 66. Circuit board; 67. Terminal block; 68. Wire; 69. Nitrogen pipeline. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] This utility model provides, for example Figure 1-4 An integrated electrode bubbling device for a glass clarification tank is shown, comprising a base plate 1; a support rod 5 is installed at the center of the surface of the base plate 1, a clarification tank body 4 is installed on the top plate of the support rod 5, a composite electrode assembly 6 is installed inside the clarification tank body 4, and an inlet pump 2 is installed on one side of the surface of the base plate 1, the output end of the inlet pump 2 is connected to the clarification tank body 4 through an inlet pipe 3.

[0026] like Figure 3 and Figure 4 As shown, the composite electrode assembly 6 includes a molybdenum electrode 61, a stainless steel electrode 63 is disposed below the molybdenum electrode 61, and a water-cooling jacket 62 is sleeved on the outside of the stainless steel electrode 63. The stainless steel electrode 63 has good thermal conductivity. The water-cooling jacket 62 indirectly dissipates heat from the upper molybdenum electrode 61 by contacting it. The water-cooling jacket 62 has a water flow channel on its inner side and an inlet pipe 64 and an outlet pipe 65 on its outer side. Through continuous water circulation, the heat conducted from the molybdenum electrode 61 is effectively removed.

[0027] A nitrogen pipeline 69 is provided at the middle position inside the molybdenum electrode 61 and the stainless steel electrode 63. By cooling the stainless steel electrode 63, the temperature of the root of the molybdenum electrode 61 connected to it can be significantly reduced, ensuring that the temperature of the part of the electrode exposed to the air layer is below the oxidation critical point, thereby preventing oxidation and burn-off. It is connected to the gas inlet at the bottom of the hollow molybdenum electrode 61 through an external pipeline for introducing inert gases such as nitrogen into the electrode.

[0028] A water inlet pipe 64 is installed on one side of the lower surface of the water cooling jacket 62, and a water outlet pipe 65 is installed on the other side of the lower surface of the water cooling jacket 62. Installing the water inlet pipe 64 and the water outlet pipe 65 on both sides of the lower surface of the water cooling jacket 62 respectively can form a smooth water flow path, allowing the cooling water to enter evenly from one side and flow fully through the interior of the water cooling jacket. After efficient heat exchange with the heat-generating components, the water flows out from the other side, effectively improving heat dissipation efficiency.

[0029] A circuit board 66 is mounted on the bottom of the stainless steel electrode 63. A terminal block 67 is mounted on the bottom of the circuit board 66, and a wire 68 is mounted on the terminal block 67. By directly mounting the circuit board 66 on the bottom of the stainless steel electrode 63, a close connection between the electrode and the circuit can be achieved, effectively shortening the signal transmission path, reducing signal attenuation and interference during transmission, thereby improving the accuracy and response speed of the detection signal.

[0030] The outlet end of the nitrogen pipeline 69 has a porous diffusion structure, and the outlet end is located in the electric field region between the molybdenum electrode 61 and the stainless steel electrode 63. The porous diffusion structure enables the introduced inert gases such as nitrogen to be dispersed in the electric field region in the form of relatively uniform and fine bubbles. The fine and uniform bubbles can increase the contact area between the gas and the surrounding medium, allowing the gas to better perform its function of isolating oxygen and preventing oxidation. At the same time, it can also improve the medium environment in the electric field region to a certain extent.

[0031] The water-cooling jacket 62 is made of 304 stainless steel. The inner wall of the water-cooling jacket 62 is machined with a spiral water flow channel. The spiral water flow channel enables the cooling water to form a spiral water flow during the flow process, which increases the contact area and contact time between the cooling water and the inner wall of the water-cooling jacket 62. This more effectively removes the heat generated by the electrode during operation, ensures that the electrode works stably in a suitable temperature environment, extends the service life of the electrode, and improves the working efficiency and stability of the entire device.

[0032] like Figure 1 and Figure 2 As shown, the inner wall of the clarification tank 4 is lined with a high-temperature refractory insulating material layer. The end of the liquid inlet pipe 3 that extends into the clarification tank 4 is made of a platinum-rhodium alloy that is resistant to glass melt corrosion. This effectively prevents the glass melt from corroding the inner wall of the clarification tank 4 and the end of the liquid inlet pipe 3 under high-temperature conditions, ensuring the long-term stable operation of the device. The high-temperature refractory insulating material layer not only has excellent high-temperature resistance but also plays a good insulating role, avoiding safety hazards such as leakage during electrode operation.

[0033] Working principle: When the hollow molybdenum electrode 61 is selected with a larger size, the inner diameter is 12mm and the total length is 800mm. This length ensures sufficient insertion depth in the deep pool, forming an effective heating zone and bubbling zone. The stainless steel electrode 63 is made of 316L and is 700mm long to provide sufficient structural support and heat dissipation area. The two are connected by precision-machined metric coarse thread, and a high-temperature resistant graphite gasket is used at the interface to ensure airtightness and electrical continuity at high temperatures. The water-cooling jacket 62 is made of 304 stainless steel, and a spiral water flow channel is machined inside the jacket wall. To increase the heat exchange area, the inlet temperature of the cooling water in the inlet pipe 64 is controlled at 25-30℃, and the flow rate is 2.5m³ / h. Measurements show that this cooling condition can stabilize the temperature at the connection between the molybdenum electrode 61 and the stainless steel electrode 63 below 250℃, which is far below the critical oxidation temperature of molybdenum. Nitrogen is supplied by an external nitrogen generator, and the bubbling gas pressure is controlled at 0.15-0.25MPa, with a flow rate of 8-12L / min. When electrically heated, the current density through the electrode is 0.8A / cm², and the tip temperature of the molybdenum electrode 61 can reach 1550℃, which is consistent with the temperature of the molten glass.

[0034] To ensure accuracy and avoid interference, the hollow molybdenum electrode 61 is made of a smaller size, with an inner diameter of 8mm and a total length of 500mm. The stainless steel electrode 63 is made of 316L steel and is 600mm long, also using threaded connections. However, all components underwent high-precision polishing and dust-free cleaning before installation to meet the requirements for controlling metal ion contamination in optical glass production. The water-cooling jacket 62 is compact, with a cooling water flow rate of 1.2m³ / h. By precisely controlling the water temperature, the temperature of the exposed section of the molybdenum electrode 61 is ensured to remain below 150℃, minimizing any possible oxidation and preventing contamination of the high-purity glass melt by molybdenum oxide volatiles. High-purity nitrogen is used in the nitrogen passage, with stainless steel pipes. The bubbling pressure is low, at 0.08-0.12MPa, and the flow rate is precisely controlled at 3-5L / min to generate small and gentle bubbles, avoiding excessive disturbance to the sensitive glass melt. The heating current density is 0.5A / cm², achieving precise and gentle heating.

[0035] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An integrated electrode bubbling device for a glass clarification tank, comprising a base plate (1); characterized in that, A support rod (5) is installed at the center of the surface of the base plate (1). A clarification tank body (4) is installed on the top plate of the support rod (5). A composite electrode assembly (6) is installed inside the clarification tank body (4). A liquid inlet pump (2) is installed on one side of the surface of the base plate (1). The output end of the liquid inlet pump (2) is connected to the clarification tank body (4) through the liquid inlet pipe (3).

2. The integrated electrode bubbling device for a glass clarification tank according to claim 1, characterized in that: The composite electrode assembly (6) includes a molybdenum electrode (61), a stainless steel electrode (63) is disposed below the molybdenum electrode (61), and a water-cooling jacket (62) is sleeved on the outside of the stainless steel electrode (63).

3. The integrated electrode bubbling device for a glass clarification tank according to claim 2, characterized in that: A nitrogen pipeline (69) is provided at the middle position inside the molybdenum electrode (61) and the stainless steel electrode (63).

4. The integrated electrode bubbling device for a glass clarification tank according to claim 2, characterized in that: A water inlet pipe (64) is installed on one side of the lower surface of the water cooling jacket (62), and a water outlet pipe (65) is installed on the other side of the lower surface of the water cooling jacket (62).

5. An integrated electrode bubbling device for a glass clarification tank according to claim 2, characterized in that: A circuit board (66) is mounted on the bottom of the stainless steel electrode (63), and a terminal block (67) is mounted on the bottom of the circuit board (66). A wire (68) is mounted on the terminal block (67).

6. The integrated electrode bubbling device for a glass clarification tank according to claim 3, characterized in that: The outlet end of the nitrogen pipeline (69) has a porous diffusion structure and is located in the electric field region between the molybdenum electrode (61) and the stainless steel electrode (63).

7. An integrated electrode bubbling device for a glass clarification tank according to claim 2, characterized in that: The water-cooling jacket (62) is made of 304 stainless steel, and a spiral water flow channel is machined inside the jacket wall.

8. The integrated electrode bubbling device for a glass clarification tank according to claim 1, characterized in that: The inner wall of the clarification tank (4) is lined with a high-temperature refractory insulating material layer, and the end of the liquid inlet pipe (3) that extends into the clarification tank (4) is made of a platinum-rhodium alloy that is resistant to glass melt corrosion.

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