Exhaust optimizing device of zone melting furnace

Abstract

The utility model relates to the technical field of smelting furnaces, in particular to an exhaust optimizing device of a zone smelting furnace. Comprising a trap tank, a glycerin tank and a settling tank, glycerin is arranged on the lower portions of the trap tank and the glycerin tank, a first air inlet pipe communicated with a zone smelting furnace is arranged above the liquid level of the glycerin in the trap tank, a second air inlet pipe is arranged between the upper portion of the trap tank and the glycerin tank, and the air outlet end of the second air inlet pipe is located below the liquid level of the glycerin. A third air inlet pipe communicated with the upper part of the glycerol tank is arranged in the settling tank; a cooling system is arranged at the middle lower part of the settling tank. After entering the first air inlet pipe along with airflow, metal steam firstly makes contact with glycerin in the trap tank to achieve primary adhesion; residual volatile matter goes deep into the position below the glycerin liquid level through the second gas inlet pipe, the concentration of metal particles in gas is remarkably reduced through bubble breakage and secondary interception, a cooling system is integrated in the settling tank, air flow carrying trace glycerin steam is forcibly cooled, and an oil-gas mixture is condensed, liquefied and deposited at the bottom of the tank body.

Description

Technical Field

[0001] This utility model relates to the field of smelting furnace technology, specifically a zone smelting furnace exhaust optimization device. Background Technology

[0002] With the rapid development of high-tech industries such as semiconductors and photovoltaics, the demand for high-purity metal materials has increased dramatically. Zone melting technology, as one of the core processes for metal purification, forms a molten zone through localized heating and utilizes the difference in the distribution of impurities between the solid and liquid phases to achieve directional separation, producing ultra-pure metals with a purity of over 99.9999%. However, metals are prone to volatilization during high-temperature melting, and their vapors flow with the protective gas (such as hydrogen) into the exhaust system, leading to the accumulation of deposits on the inner walls of the pipes, reducing exhaust efficiency, and even causing blockages. In addition, pressure fluctuations within the melting furnace can cause gas backflow, threatening process stability and operational safety.

[0003] In traditional technologies, inert gas covering or vacuum melting methods are typically used to suppress metal volatilization. However, inert gases cannot completely prevent the volatilization of high vapor pressure metals (such as zinc and magnesium), and while a vacuum environment can reduce the volatilization rate, it significantly increases equipment complexity and energy consumption. Existing zone melting furnaces rely on flowing hydrogen as a protective medium, which can prevent oxidation, but the high permeability of hydrogen exacerbates the problem of volatiles spreading with the gas flow. Utility Model Content

[0004] The present invention aims to solve the above problems, thereby providing a regional smelting furnace exhaust optimization device for pipeline pollution and blockage.

[0005] The technical solution adopted by this utility model to solve the aforementioned problem is:

[0006] A zone melting furnace exhaust optimization device includes a trap tank, a glycerol tank, and a settling tank. Each of the trap tank, glycerol tank, and settling tank has a flange cover on its top. Glycerol is placed in the lower part of the trap tank and the glycerol tank. A first air inlet pipe, connected to the zone melting furnace, is located above the glycerol liquid level in the trap tank. A second air inlet pipe is located between the upper part of the trap tank and the glycerol tank, with its outlet located below the glycerol liquid level. A third air inlet pipe, connected to the upper part of the glycerol tank, is located inside the settling tank. A cooling system is located in the middle and lower part of the settling tank, with the outlet of the third air inlet pipe located within the cooling system. An outlet pipe is located at the upper part of the settling tank.

[0007] Compared with the prior art, the outstanding features of this utility model, which adopts the above technical solution, are:

[0008] With the double-layer glycerin liquid surface design of the trap tank and glycerin tank, metal vapor enters the first air inlet pipe with the airflow and first comes into contact with the glycerin in the trap tank to achieve initial adhesion; residual volatiles penetrate deep below the glycerin liquid surface through the second air inlet pipe and are intercepted for the second time by the bursting of bubbles, which significantly reduces the concentration of metal particles in the gas and avoids the risk of blockage caused by the accumulation of deposits on the inner wall of the pipe. The settling tank integrates a cooling system to force the airflow carrying trace amounts of glycerin vapor to cool down, so that the oil-gas mixture condenses and liquefies and deposits at the bottom of the tank, effectively avoiding secondary pollution of the exhaust gas caused by glycerin volatilization. The liquid seal structure in the glycerin tank physically blocks the gas backflow path.

[0009] As a preferred embodiment, a further technical solution of this utility model is:

[0010] Furthermore, the glycerin level inside the trap tank is 1 / 5 to 1 / 4 of the tank's height. By controlling the glycerin level, glycerin splashing is prevented, metal vapor escape is avoided, and the risk of pipe blockage is reduced.

[0011] Furthermore, the liquid level of glycerol in the glycerol tank is 1 / 3 to 1 / 2 of the tank height. The deep liquid level forms a physical liquid seal barrier. The outlet end of the second air inlet pipe is submerged 1-3 cm below the glycerol liquid surface. The residual metal particles are captured a second time through the turbulent effect of bubble bursting. The liquid seal structure blocks the gas backflow path, which can maintain unidirectional gas flow and ensure process stability.

[0012] Furthermore, the intake end of the second intake pipe is bent upwards. The bending design guides the airflow vertically upwards into the glycerin tank, preventing unsettled metal particles in the trap tank from being directly rushed into the second intake pipe by the horizontal airflow.

[0013] Furthermore, the cooling system includes water-cooled pipes surrounding the lower part of the settling tank. The water-cooled pipes adopt a spiral coil layout, which rapidly reduces the outlet temperature of the third air inlet pipe, causing glycerin vapor to condense into droplets. At the same time, the condensate settles to the bottom of the tank by gravity and can be periodically recycled.

[0014] Furthermore, the third intake pipe consists of a horizontal straight section and a vertical serpentine section. The horizontal straight section is located on the water-cooling pipe and connects the glycerin tank and the settling tank. The vertical serpentine section is located inside the settling tank and on the inner side of the settling tank surrounded by the water-cooling pipe, which prolongs the gas residence time, enhances the condensation effect, and ensures that the oil and gas are fully separated. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0016] The following are labeled in the diagram: Trap tank 1, Glycerin tank 2, Settling tank 3, Flange cover 4, First air inlet pipe 5, Second air inlet pipe 6, Third air inlet pipe 7, Air outlet pipe 8, Water cooling pipe 9. Detailed Implementation

[0017] The present invention will be further described below with reference to embodiments, the purpose of which is only to better understand the content of the present invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0018] A zone melting furnace exhaust optimization device includes a trap tank 1, a glycerol tank 2, and a settling tank 3. Each of the trap tank 1, glycerol tank 2, and settling tank 3 is topped with a flange cover 4. Glycerol is placed at the bottom of the trap tank 1 and glycerol tank 2. A first air inlet pipe 5, communicating with the zone melting furnace, is located above the glycerol surface in the trap tank 1. The main body of the first air inlet pipe 5 is horizontally arranged, and the pipe body located inside the trap tank 1 is bent downwards at a 90° angle to the glycerol surface. A [missing information - likely a conduit or structure] is provided between the upper part of the trap tank 1 and the glycerol tank 2. The second air inlet pipe 6 has its outlet end located below the glycerin liquid surface. The main body of the second air inlet pipe 6 is horizontally arranged and located inside the glycerin tank 2. The pipe body is bent downwards at 90° to insert below the glycerin liquid surface. A third air inlet pipe 7 is provided inside the settling tank 3 and communicates with the upper part of the glycerin tank 2. A cooling system is provided in the middle and lower part of the settling tank 3. The outlet end of the third air inlet pipe 7 is located between the cooling systems. An outlet pipe 8 is provided at the upper part of the settling tank 3. The outlet pipe 8 is horizontally arranged and located above the cooling system.

[0019] Furthermore, the glycerin level in trap tank 1 is 1 / 5 to 1 / 4 of the tank height. By controlling the glycerin level, glycerin splashing is prevented, metal vapor escape is avoided, and the risk of pipe blockage is reduced.

[0020] Furthermore, the liquid level of glycerin in glycerin tank 2 is 1 / 3 to 1 / 2 of the tank height. The deep liquid level forms a physical liquid seal barrier. The outlet end of the second air inlet pipe 6 is submerged 1-3 cm below the glycerin liquid surface. The residual metal particles are captured a second time through the turbulent effect of bubble bursting. The liquid seal structure blocks the gas backflow path, which can maintain the unidirectional flow of gas and ensure process stability.

[0021] Furthermore, the intake end of the second intake pipe 6 is bent upward at 90°. The bending design guides the airflow vertically upward into the glycerin tank 2, preventing unsettled metal particles in the trap tank 1 from being directly rushed into the second intake pipe 6 by the horizontal airflow.

[0022] Furthermore, the cooling system includes a water-cooled pipe 9 surrounding the lower part of the settling tank 3. The water-cooled pipe 9 adopts a spiral coil layout, which rapidly reduces the outlet temperature of the third air inlet pipe 7, causing the glycerol vapor to condense into droplets. At the same time, the condensate settles to the bottom of the tank by gravity and can be periodically recycled.

[0023] Furthermore, the third intake pipe 7 consists of a horizontal straight pipe section and a vertical serpentine pipe section. The horizontal straight pipe section is located on the water cooling pipe 9 and connects the glycerin tank 2 and the settling tank 3. The vertical serpentine pipe section is located inside the settling tank 3 and is located inside the settling tank 3 surrounded by the water cooling pipe 9, which prolongs the gas residence time, enhances the condensation effect, and ensures that the oil and gas are fully separated.

[0024] With the double-layer glycerin liquid surface design of trap tank 1 and glycerin tank 2, metal vapor enters the first air inlet pipe 5 with the airflow and first comes into contact with the glycerin in trap tank 1 to achieve initial adhesion; residual volatiles penetrate deep below the glycerin liquid surface through the second air inlet pipe 6 and are intercepted for the second time by bubble rupture, which significantly reduces the concentration of metal particles in the gas and avoids the risk of blockage caused by the accumulation of deposits on the inner wall of the pipe. The settling tank 3 integrates a cooling system to force the airflow carrying trace amounts of glycerin vapor to cool down, so that the oil-gas mixture condenses and liquefies and is deposited at the bottom of the tank, effectively avoiding secondary pollution of the exhaust gas caused by glycerin volatilization. The liquid seal structure in glycerin tank 2 physically blocks the gas backflow path.

[0025] The above description is only a preferred embodiment of the present utility model and does not limit the scope of the present utility model. All equivalent changes made based on the content of the present utility model specification and its drawings are included within the scope of the present utility model.

Claims

1. A zone melting furnace exhaust optimization apparatus, characterized by: The trap tank, the glycerol tank and the settling tank are provided with flange covers at the top, and the lower part of the trap tank and the glycerol tank is provided with glycerol, the first air inlet pipe communicated with the zone melting furnace is arranged above the liquid level of the glycerol in the trap tank, the second air inlet pipe is arranged between the upper part of the trap tank and the glycerol tank, the air outlet end of the second air inlet pipe is below the liquid level of the glycerol, the third air inlet pipe communicated with the upper part of the glycerol tank is arranged in the settling tank, the cooling system is arranged in the middle and lower part of the settling tank, the air outlet end of the third air inlet pipe is between the cooling system, and the air outlet pipe is arranged in the upper part of the settling tank.

2. A zone melting hearth exhaust optimization apparatus according to claim 1, characterized in that: The liquid level of the glycerol in the trap tank is 1 / 5-1 / 4 of the height of the tank body.

3. The zone melting grate exhaust optimization apparatus of claim 1, wherein: The liquid level of the glycerol in the glycerol tank is 1 / 3-1 / 2 of the height of the tank body.

4. The zone melting grate exhaust optimization apparatus of claim 1, wherein: The air inlet end of the second air inlet pipe is upwardly bent.

5. The zone melting grate exhaust optimization apparatus of claim 1, wherein: The cooling system comprises water cooling pipes surrounding the middle and lower part of the settling tank.

6. The zone melting grate exhaust optimization apparatus of claim 5, wherein: The third air inlet pipe is composed of a horizontal straight pipe section and a vertical serpentine pipe section, the horizontal straight pipe section is arranged on the water cooling pipes to connect the glycerol tank and the settling tank, and the vertical serpentine pipe section is arranged in the settling tank and on the inner side of the settling tank surrounded by the water cooling pipes.

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