Smelting vacuum furnace with smoke abatement mechanism

Abstract

The utility model relates to the technical field of smelting vacuum furnaces, in particular to a smelting vacuum furnace with a smoke abatement mechanism, which comprises a vacuum furnace body, a smoke treatment mechanism is arranged on the outer side of the vacuum furnace body, the smoke treatment mechanism comprises a first smoke outlet pipe fixedly connected to the outer side wall of the vacuum furnace body, and the bottom end of the first smoke outlet pipe is fixedly connected with a filter box. The bottom end of the filter box is fixedly connected with a second smoke outlet pipe, the side, away from the filter box, of the second smoke outlet pipe is communicated with a spiral heat exchange pipe, the spiral heat exchange pipe is fixedly connected to the outer side wall of the vacuum furnace body, the end, away from the filter box, of the spiral heat exchange pipe is fixedly connected with a condensation smoke eliminator, and the bottom end of the condensation smoke eliminator is fixedly connected with a conical pipeline. The vacuum furnace body is matched with the smoke treatment mechanism, the coarse-mesh filter screen and the fine-mesh filter screen firstly filter large-particle smoke dust, the spiral heat exchange pipe is prevented from being blocked, heat in high-temperature smoke is conducted to the vacuum furnace body through the spiral heat exchange pipe, heat energy waste is reduced, and the energy utilization rate is increased.

Description

Technical Field

[0001] This utility model relates to the field of melting vacuum furnace technology, specifically to a melting vacuum furnace with a smoke elimination mechanism. Background Technology

[0002] Vacuum melting furnaces are widely used in metal smelting, alloy preparation, and special material processing because they effectively prevent material oxidation and improve purity. However, traditional vacuum furnaces easily generate large amounts of smoke and dust during high-temperature smelting, especially when processing raw materials containing volatiles (such as zinc, lead, or organic matter). This smoke not only pollutes the furnace cavity, causing blurred observation windows and sensor misinterpretations, but may also enter the exhaust system with the vacuum pump, easily clogging filters or causing environmental pollution. Furthermore, particulate matter in the smoke deposits on the furnace inner wall or electrodes, reducing thermal efficiency and even posing a short-circuit risk.

[0003] The direct discharge of smelting furnace smoke after filtration by traditional exhaust devices can easily lead to heat waste. At the same time, the direct discharge of smoke can cause uneven gas distribution inside the furnace and accumulation of volatile impurities, which can easily shorten the service life of the vacuum pump.

[0004] Therefore, it is necessary to invent a smelting vacuum furnace with a smoke elimination mechanism to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a smelting vacuum furnace with a smoke elimination mechanism. By cooperating with the vacuum furnace body and the smoke treatment mechanism, smoke elimination and gas circulation are achieved, which solves the problems in the prior art where direct discharge of filtered smoke and dust easily leads to heat waste. At the same time, direct discharge of smoke results in uneven gas distribution inside the furnace body, accumulation of volatile impurities, and easy reduction of the service life of the vacuum pump.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a smelting vacuum furnace with a smoke elimination mechanism, comprising a vacuum furnace body, a smoke treatment mechanism disposed on the outer side of the vacuum furnace body, the smoke treatment mechanism comprising a first smoke outlet pipe fixedly connected to the outer wall of the vacuum furnace body, a filter box fixedly connected to the bottom end of the first smoke outlet pipe, a second smoke outlet pipe fixedly connected to the bottom end of the filter box, a spiral heat exchange tube connected to the side of the second smoke outlet pipe away from the filter box, the spiral heat exchange tube fixedly connected to the outer wall of the vacuum furnace body, a condensing smoke eliminater fixedly connected to the end of the spiral heat exchange tube away from the filter box, a conical pipe fixedly connected to the bottom end of the condensing smoke eliminater, an automatic valve fixedly connected to the bottom end of the conical pipe, and a soot collection box fixedly connected to the bottom end of the automatic valve. Through the cooperation of the filter box and other components, the flue gas carrying heat provides residual heat to the vacuum furnace body through the spiral heat exchange tube, and is purified by the condensing smoke eliminater and other components.

[0007] Preferably, a furnace cover is installed at the top of the vacuum furnace body, and a base is fixedly connected to the bottom of the vacuum furnace body. The filter box and the soot collection box are fixedly connected to the top of the base, and the base provides support for the vacuum furnace body and other parts.

[0008] Preferably, a coarse-mesh filter screen is slidably connected to the inner wall of the filter box, and a fine-mesh filter screen is slidably connected to the inner wall of the filter box. The fine-mesh filter screen is located below the coarse-mesh filter screen. Large particulate impurities are filtered twice by the coarse-mesh filter screen and the fine-mesh filter screen, so as to avoid clogging of the spiral heat exchange tube.

[0009] Preferably, a filter tube is fixedly connected to the outside of the condenser smoke suppressor, and a transfer tank is fixedly connected to the top of the filter tube, so that impurities are prevented from entering the interior of the transfer tank through the filter tube.

[0010] Preferably, the transfer tank is fixedly connected to the outer wall of the condenser smoke eliminator, and a circulating air pump is fixedly connected to the side of the transfer tank near the vacuum furnace body. The cooperation between the transfer tank and the filter tube prevents impurities from entering the interior of the circulating air pump.

[0011] Preferably, the circulating air pump is fixedly connected to the vacuum furnace body, and an electromagnetic valve is installed at the connection between the circulating air pump and the vacuum furnace body to realize gas circulation inside the vacuum furnace body through the circulating air pump.

[0012] Preferably, a first cleaning door is installed on the outer wall of the filter box, and a second cleaning door is installed on the surface of the ash collection box, so that the filter box and the ash collection box can be cleaned conveniently using the first and second cleaning doors.

[0013] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0014] By coordinating the vacuum furnace body with the fume treatment mechanism, coarse and fine mesh filters first filter out large particles of smoke and dust to prevent the spiral heat exchange tubes from clogging. The spiral heat exchange tubes then transfer heat from the high-temperature flue gas to the vacuum furnace body, reducing heat waste and improving energy utilization. The condenser further cools and purifies the flue gas, causing volatile impurities to condense and be collected in the ash collection box, reducing the risk of contamination from the vacuum pump. At the same time, the circulating air pump reintroduces the purified gas into the vacuum furnace body to maintain the pressure balance inside the furnace, avoid uneven gas distribution, improve smelting quality, reduce the entry of external air, lower the risk of oxidation, and extend the service life of the vacuum pump. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1 This is a schematic diagram of the overall first-view structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the overall second-view structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the internal structure of the filter box of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the condenser smoke extinguisher of this utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Vacuum furnace body; 2. Smoke treatment mechanism; 201. First smoke outlet pipe; 202. Filter box; 203. Second smoke outlet pipe; 204. Spiral heat exchange tube; 205. Condenser smoke eliminator; 206. Conical pipe; 207. Automatic valve; 208. Ash collection box; 3. Furnace cover; 4. Base; 5. Coarse mesh filter screen; 6. Fine mesh filter screen; 7. Filter tube; 8. Transfer tank; 9. Circulating air pump; 10. Cleaning door one; 11. Cleaning door two. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0023] This utility model provides, for example Figure 1-4The smelting vacuum furnace shown includes a vacuum furnace body 1. A smoke treatment mechanism 2 is provided on the outer side of the vacuum furnace body 1. The smoke treatment mechanism 2 includes a first smoke outlet pipe 201 fixedly connected to the outer wall of the vacuum furnace body 1. A filter box 202 is fixedly connected to the bottom end of the first smoke outlet pipe 201. A second smoke outlet pipe 203 is fixedly connected to the bottom end of the filter box 202. A spiral heat exchange tube 204 is connected to the side of the second smoke outlet pipe 203 away from the filter box 202. The spiral heat exchange tube 204 is fixedly connected to the outer wall of the vacuum furnace body 1. A condenser smoke eliminator 205 is fixedly connected to the end of the spiral heat exchange tube 204 away from the filter box 202. A conical pipe 206 is fixedly connected to the bottom end of the condenser smoke eliminator 205. An automatic valve 207 is fixedly connected to the bottom end of the conical pipe 206. An ash collection box 208 is fixedly connected to the bottom end of the automatic valve 207. Ash collection is achieved by passing ash through the filter box 202 and other components. The components work together to provide residual heat to the vacuum furnace body 1 through the spiral heat exchange tube 204, while the flue gas is purified by components such as the condenser smoke eliminator 205. The top of the vacuum furnace body 1 is equipped with a furnace cover 3, and the bottom of the vacuum furnace body 1 is fixedly connected to a base 4. The filter box 202 and the soot collection box 208 are fixedly connected to the top of the base 4, which provides support for the vacuum furnace body 1 and other components. The inner wall of the filter box 202 is slidably connected to a coarse mesh filter 5, and the inner wall of the filter box 202 is slidably connected to a fine mesh filter 6. The fine mesh filter 6 is located below the coarse mesh filter 5. The coarse mesh filter 5 and the fine mesh filter 6 perform double filtration of large particles of impurities to prevent the spiral heat exchange tube 204 from clogging. The outer side of the condenser smoke eliminator 205 is fixedly connected to a filter tube 7, and the top of the filter tube 7 is fixedly connected to a transfer tank 8. The filter tube 7 prevents impurities from entering the interior of the transfer tank 8.

[0024] Refer to the instruction manual appendix Figure 1-4The transfer tank 8 is fixedly connected to the outer wall of the condenser smoke eliminator 205. A circulating air pump 9 is fixedly connected to the side of the transfer tank 8 closest to the vacuum furnace body 1. The cooperation between the transfer tank 8 and the filter pipe 7 prevents impurities from entering the circulating air pump 9. The circulating air pump 9 is fixedly connected to the vacuum furnace body 1, and a solenoid valve is installed at the connection point. Gas circulation within the vacuum furnace body 1 is achieved through the circulating air pump 9. A cleaning door 10 is installed on the outer wall of the filter box 202, and a cleaning door 21 is installed on the surface of the ash collection box 208. The cleaning doors 10 and 211 facilitate the cleaning of the filter box 202 and the ash collection box 208. In conjunction with the fume treatment unit 2, the coarse-mesh filter 5 and the fine-mesh filter 6 first filter large particles of smoke and dust to prevent the spiral heat exchange tube 204 from clogging. The heat in the high-temperature flue gas is transferred to the vacuum furnace body 1 through the spiral heat exchange tube 204, reducing heat energy waste and improving energy utilization. The condenser smoke eliminator 205 further cools and purifies the flue gas, causing volatile impurities to condense and be collected in the soot collection box 208, reducing the risk of contamination of the vacuum pump. At the same time, the circulating air pump 9 reintroduces the purified gas into the vacuum furnace body 1 to maintain the gas pressure balance in the furnace, avoid uneven local gas distribution, improve the melting quality, reduce the entry of external air, reduce the risk of oxidation, and extend the service life of the vacuum pump.

[0025] The working principle of this practical application is as follows:

[0026] Refer to the instruction manual appendix Figure 1-4 During the smelting process in the vacuum furnace 1, the flue gas enters the filter box 202 through the first flue gas outlet pipe 201. As the flue gas passes through the filter box 202, the coarse-mesh filter 5 intercepts larger dust particles, while the fine-mesh filter 6 further filters out smaller impurities to prevent blockage of subsequent pipes. The filtered high-temperature flue gas then enters the spiral heat exchange tube 204, which is attached to the outer wall of the vacuum furnace 1. Through heat conduction, the residual heat of the flue gas is transferred to the furnace body, reducing heat loss. The cooled flue gas then enters the condenser smoke eliminator 205, where volatile impurities are liquefied through cooling and flow along the conical pipe 206 into the ash collection box 208. Automatic valve 2... 07 automatically opens according to pressure, discharging accumulated condensate into the ash collection box 208. The purified gas enters the transfer tank 8 through the filter pipe 7, ensuring no solid impurities remain. The circulating air pump 9 pumps the gas back into the vacuum furnace body 1 to maintain stable gas pressure inside the furnace, avoid uneven gas distribution, and reduce the load on the vacuum pump. When it is necessary to clean the inside of the filter box 202, open the first cleaning door 10, pull out the fine mesh filter 6 and the coarse mesh filter 5 for cleaning and replacement, and open the second cleaning door 11 behind the ash collection box 208 to clean the inside of the ash collection box 208.

[0027] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A smelting vacuum furnace with a smoke elimination mechanism, comprising a vacuum furnace body (1), characterized in that: A smoke treatment mechanism (2) is provided on the outside of the vacuum furnace body (1). The smoke treatment mechanism (2) includes a first smoke outlet pipe (201) fixedly connected to the outer wall of the vacuum furnace body (1). A filter box (202) is fixedly connected to the bottom end of the first smoke outlet pipe (201). A second smoke outlet pipe (203) is fixedly connected to the bottom end of the filter box (202). A spiral heat exchange tube (204) is connected to the side of the second smoke outlet pipe (203) away from the filter box (202). The spiral heat exchange tube (204) is fixedly connected to the outer wall of the vacuum furnace body (1). A condenser smoke eliminator (205) is fixedly connected to the end of the spiral heat exchange tube (204) away from the filter box (202). A tapered pipe (206) is fixedly connected to the bottom end of the condenser smoke eliminator (205). An automatic valve (207) is fixedly connected to the bottom end of the tapered pipe (206). An ash collection box (208) is fixedly connected to the bottom end of the automatic valve (207).

2. A smelting vacuum furnace with a smoke elimination mechanism according to claim 1, characterized in that: The top of the vacuum furnace body (1) is fitted with a furnace cover (3), and the bottom of the vacuum furnace body (1) is fixedly connected to a base (4). The filter box (202) and the soot collection box (208) are fixedly connected to the top of the base (4).

3. A smelting vacuum furnace with a smoke elimination mechanism according to claim 1, characterized in that: The inner wall of the filter box (202) is slidably connected to a coarse mesh filter (5), and the inner wall of the filter box (202) is slidably connected to a fine mesh filter (6), with the fine mesh filter (6) located below the coarse mesh filter (5).

4. A smelting vacuum furnace with a smoke elimination mechanism according to claim 1, characterized in that: A filter tube (7) is fixedly connected to the outside of the condenser smoke extinguisher (205), and a transfer tank (8) is fixedly connected to the top of the filter tube (7).

5. A smelting vacuum furnace with a smoke elimination mechanism according to claim 4, characterized in that: The transfer tank (8) is fixedly connected to the outer wall of the condenser smoke eliminator (205), and a circulating air pump (9) is fixedly connected to the side of the transfer tank (8) near the vacuum furnace body (1).

6. A smelting vacuum furnace with a smoke elimination mechanism according to claim 5, characterized in that: The circulating air pump (9) is fixedly connected to the vacuum furnace body (1), and an electromagnetic valve is installed at the connection between the circulating air pump (9) and the vacuum furnace body (1).

7. A smelting vacuum furnace with a smoke elimination mechanism according to claim 1, characterized in that: The outer wall of the filter box (202) is equipped with a cleaning door one (10), and the surface of the ash collection box (208) is equipped with a cleaning door two (11).

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