Smoke abatement device for smelting of vacuum furnace

Abstract

The utility model relates to a smoke abatement device for smelting of a vacuum furnace, which is characterized by comprising a smoke abatement filtering system and a fan which are connected in series through a pipeline assembly, the smoke abatement filtering system comprises a condensation smoke abatement device and a filter element smoke abatement device which are connected in series, the condensation smoke abatement device comprises a condensation container shell, a cooler is arranged in the condensation container shell, and the filter element smoke abatement device is connected with the fan. The filter element smoke eliminator comprises a filtering container shell, a filter element is arranged in the filtering container shell, the condensing container shell and the filtering container shell are respectively connected with a powder collecting tank through pipelines, and a visual window is arranged on the powder collecting tank. The smoke abatement device for smelting of the vacuum furnace can assist in the smelting process of a vacuum system, on the premise that the atmosphere environment of a vacuum cavity is not damaged, continuity of the smelting process is effectively guaranteed, the adsorption force of dust in smoke is guaranteed, settled dust can be collected and treated in time, and safe production is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of metallurgical steel liquid smelting, in particular to a smoke elimination device for vacuum furnace smelting. Background Art

[0002] When smelting equipment such as vacuum furnaces are carrying out metal smelting operations, smoke-containing gas will be generated inside the smelting equipment, which can easily pollute the smelting equipment and even cause safety hazards. The patent with publication number CN210441673U discloses an internal circulation filtration device for a vacuum or gas-protected smelting system, including a dust removal pipeline, in which a first vacuum valve, a water-cooled grille, a vacuum fan, a dust-free and high-temperature resistant filter element, and a second vacuum valve are sequentially arranged; one end of the dust removal pipeline close to the first vacuum valve is connected to the top of the vacuum smelting chamber, and the other end is connected to the lower side of the vacuum smelting chamber. However, the filtering device cannot process the adsorbed or settled dust, nor can it determine whether the device pipeline is blocked. In addition, whether dust explosion and other safety issues will occur during the smoke elimination process are also issues worthy of attention. Utility Model Content

[0003] The purpose of the utility model is to provide a fume elimination device for vacuum furnace smelting, which can at least partially solve the technical problems mentioned in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a smoke elimination device for vacuum furnace smelting, comprising: a smoke elimination filtering system and a fan connected in series through a pipeline assembly, the smoke elimination filtering system comprising a condensing smoke eliminator and a filter element smoke eliminator connected in series, the condensing smoke eliminator comprising a condensing container shell, a cooler being arranged in the condensing container shell, the filter element smoke eliminator comprising a filter container shell, a filter element being arranged in the filter container shell, the condensing container shell and the filter container shell being respectively connected to a powder collecting tank through a pipeline, and a visual window being arranged on the powder collecting tank.

[0005] In one embodiment, the pipeline is connected to a second valve body for controlling the on-off of the pipeline.

[0006] In one embodiment, the powder collecting tank is detachably connected to the pipeline, and the powder collecting tank is provided with a collecting pipeline, and the collecting pipeline is connected to a third valve body, so as to ensure the vacuum state inside the powder collecting tank when the powder collecting tank is disassembled, so as to prevent dust explosion accidents.

[0007] In one embodiment, the condensing smoke eliminator and / or filter element smoke eliminator is provided in two or more sets, and the same type of smoke eliminators are arranged in parallel to enhance the smoke absorption effect.

[0008] In one embodiment, the filter element smoke eliminator further includes a purge mechanism for sweeping the filter element with water to prevent a large amount of dust from being adsorbed on the filter element, thereby affecting the smoke elimination effect and increasing the risk of explosion of ultrafine powder.

[0009] In one embodiment, the purge mechanism comprises an inert gas buffer bag, wherein the inert gas buffer bag is provided with a gas nozzle, and the gas nozzle passes through the filter container housing and faces the filter element.

[0010] In one embodiment, the filter element smoke eliminator also includes a first pressure transmitter connected to the front end pipeline of the condensation smoke eliminator and a second pressure transmitter connected to the rear end pipeline of the filter element smoke eliminator, and a first pressure gauge connected to the filter element smoke eliminator pipeline. The first pressure transmitter and the second pressure transmitter are used together to determine the timing of dust purge, and the first pressure gauge is used to determine the timing of filter element replacement.

[0011] In one embodiment, the smoke elimination and filtering system further includes a flame detector and a fire extinguishing system, wherein the flame detector is connected to the filter container housing, and the fire extinguishing system is connected to the filter container housing via a gas pipeline.

[0012] In one embodiment, the gas pipeline is connected to a pneumatic valve for controlling the on / off of the fire extinguishing container and a second pressure gauge for detecting the internal pressure of the fire extinguishing container.

[0013] In one embodiment, the smoke elimination device further comprises an explosion-proof control cabinet for accommodating the smoke elimination filter system, wherein the explosion-proof control cabinet is provided with an openable and closable door and a ventilation grille. The explosion-proof control cabinet can not only integrate the distribution of electric control, but also prevent other personnel from accidentally touching the valves or switches of the smoke elimination filter system, and can also play the role of explosion buffer.

[0014] Compared with the prior art, the beneficial effect of the utility model is that the smoke elimination device for vacuum furnace smelting provided by the utility model can assist the smelting process of the vacuum system, and effectively ensure the continuity of the smelting process without destroying the atmosphere environment of the vacuum chamber. Among them, the smoke elimination and filtration system can effectively ensure the adsorption of dust in the smoke by setting a two-stage smoke elimination structure of a condensing smoke eliminator and a filter element smoke eliminator. By respectively setting a powder collection tank and a visual window in the condensing smoke eliminator and the filter element smoke eliminator, the settled dust can be collected and processed in time. Furthermore, by setting a fire extinguishing system and a flame detector, it can effectively detect the occurrence of fire information, and take fire extinguishing measures in time to ensure safe production. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of a smoke elimination device for vacuum furnace smelting in an embodiment of the utility model;

[0016] Figure 2This is a schematic diagram of the internal structure of a smoke elimination device for vacuum furnace smelting in an embodiment of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the condensing smoke eliminator in the embodiment of the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the cooler in the embodiment of the utility model;

[0019] Figure 5 This is a schematic diagram of the structure of the filter element smoke eliminator in the embodiment of the utility model;

[0020] Figure 6 This is a schematic diagram of the structure of the filter element in the embodiment of the utility model;

[0021] Figure 7 It is a structural schematic diagram of the fire extinguishing system in the embodiment of the utility model.

[0022] The meaning of each number in the figure is:

[0023] 1. Melting equipment; 2. Smoke elimination and filtration system; 3. Fan; 4. Exhaust pipeline; 5. Inlet pipeline; 6. Series pipeline; 7. First valve body; 8. Explosion-proof control cabinet; 81. Openable and closable door; 82. Ventilation grille; 83. Ventilation fan;

[0024] 21. Condensation smoke eliminator; 211. Condensation container shell; 212. Cooler; 213. Smoke inlet; 214. Smoke outlet; 215. Conical pipe; 2151. Second valve body; 216. Powder collecting tank; 217. Visual window; 218. Collecting pipeline; 2181. Third valve body; 22. Filter element smoke eliminator; 221. Filter container shell; 222. Filter element; 223. Inert gas buffer bag; 224. Gas nozzle; 225. First pressure transmitter; 226. Second pressure transmitter; 227. First pressure gauge; 23. Flame detector; 24. Fire extinguishing system; 25. Gas pipeline; 251. Pneumatic valve; 252. Second pressure gauge. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0027] See also Figure 1-Figure 2 The present embodiment discloses a smoke elimination device for vacuum furnace smelting, which is used in conjunction with a smelting device 1. The smelting device 1 is provided with an air inlet and an air outlet, which are respectively connected to the smoke elimination device to form a circulation loop. The smoke elimination device in the present embodiment includes a smoke elimination filter system 2 and a fan 3 connected in series through a pipeline assembly, and the pipeline assembly includes an outlet pipeline 4 connected between the air outlet of the smelting device 1 and the smoke elimination filter system 2, an inlet pipeline 5 connected between the fan 3 and the air inlet of the smelting device 1, and a series pipeline 6 connected between the smoke elimination filter system 2 and the fan 3, wherein the outlet pipeline 4 and the inlet pipeline 5 are respectively connected with a first valve body 7 for pipeline on-off control and flow control.

[0028] The fan 3 is used to provide the original power for air intake and exhaust. The smoke generated in the smelting equipment 1 enters the smoke elimination and filtration system 2 through the air outlet pipe 4, forms smoke sedimentation, and then enters the fan 3, and finally returns to the smelting equipment 1 through the air intake pipe 5, forming a circulation loop.

[0029] For details, see Figure 3 , Figure 4 The smoke elimination and filtering system 2 includes a condensation smoke eliminator 21, which includes a condensation container shell 211, the interior of the condensation container shell 211 is a cavity, and a cooler 212 is provided in the cavity. The condensation container shell 211 is respectively provided with a smoke inlet 213 and a smoke outlet 214, and the bottom of the condensation container shell 211 is connected to a powder collecting tank 216 through a conical pipe 215, and the conical pipe 215 is connected to a second valve body 2151 for controlling its on and off. In addition, a visual window 217 for observing the internal state of the powder collecting tank 216 is also provided. When smoke enters the cavity of the condensation smoke eliminator 21, the hot smoke collides with the cooler 212 and settles, and falls into the powder collecting tank 216. The staff can understand the amount of powder in the powder collecting tank 216 by observing the visual window 217 and perform regular processing.

[0030] Exemplarily, the cooler 212 may adopt a water cooling structure, such as a water cooling grid, and the water inlet and outlet pipes of the water cooling grid are fixedly connected to the top cover of the condensation container shell 211.

[0031] In order to facilitate the processing of the powder in the powder collecting tank 216, the powder collecting tank 216 is detachably connected to the conical pipe 215. Specifically, a collecting pipe 218 is provided at the top of the powder collecting tank 216, and the collecting pipe 218 is connected to the conical pipe 215 through a flange or a clamp. It is known to those skilled in the art that vacuum-sealed powder collection can reduce dust explosion. In order to ensure the vacuum state in the powder collecting tank 216 during disassembly, the collecting pipe 218 is connected to the third valve body 2181. After the operation is completed, the second valve body 2151 of the conical pipe 215 is closed first, and then the third valve body 2181 of the collecting pipe 218 is closed, and the collecting pipe 218 is detached from the conical pipe 215 to perform powder hardening treatment.

[0032] In some preferred embodiments, the condensing smoke eliminators 21 are provided in two or more sets to enhance the smoke absorption effect. The condensing smoke eliminators 21 are connected in parallel, and the specific number can be set according to actual needs.

[0033] Combination Figure 5 , Figure 6 The smoke filtration system 2 also includes a filter element smoke eliminator 22 connected to the smoke outlet 214 of the condensing smoke eliminator 21, and the filter element smoke eliminator 22 includes a filter container shell 221, the interior of the filter container shell 221 is a cavity, and a filter element 222 is arranged in the cavity. Consistent with the structure of the condensing container shell 211, the filter container shell 221 is also provided with a smoke inlet 213 and a smoke outlet 214, and the bottom of the filter container shell 221 is also connected to a powder collecting tank 216 through a conical pipe 215. When smoke enters the cavity of the filter element smoke eliminator 22, the dust in the smoke is adsorbed on the filter element 222, and some smoke particles settle in the powder collecting tank 216. The structure of the powder collecting tank 216 is consistent with that in the condensing smoke eliminator 21, and will not be repeated here. Exemplarily, the filter element 222 can adopt a non-woven filter element structure or a metal filter element structure with tiny filter holes.

[0034] When the device continues to work, a large amount of dust will be adsorbed on the filter element 222, thereby affecting the smoke elimination effect and increasing the risk of ultrafine powder explosion. Therefore, it is necessary to regularly blow away the dust on the filter element 222. In this embodiment, the filter element smoke eliminator 22 further includes a blowing mechanism, which includes an inert gas buffer bag 223. The inert gas buffer bag 223 is provided with a plurality of groups of air nozzles 224. The air nozzles 224 pass through the filter container housing 221 and face the filter element 222 for blowing the filter element 222. The inert gas buffer bag 223 can be fixedly connected to the filter container housing 221, or it can be fixed to the support table by a bracket. The gas buffer bag belongs to the prior art, and its structure is not described here.

[0035] In some embodiments, Figure 2 The filter element smoke eliminator 22 also includes a first pressure transmitter 225 connected to the front end pipeline (exhaust pipeline 4) of the condensing smoke eliminator 21 and a second pressure transmitter 226 connected to the rear end pipeline of the filter element smoke eliminator 22, and a first pressure gauge 227 connected to the tapered pipe 215 of the filter element smoke eliminator 22. The first pressure transmitter 225 and the second pressure transmitter 226 are used to determine the timing of dust purging. When the value of the second pressure transmitter 226 is higher than 1.2 to 1.5 times the value of the first pressure transmitter 225, the solenoid valve of the gas buffer bag is automatically opened to perform a spot spray purge on the filter element 222. The first pressure gauge 227 is used to detect the pressure in the cavity of the filter container. When the pressure value is higher than the pressure value of the smelting equipment 1 by 1.2 to 1.5 times, it is necessary to stop the purge action and replace the filter element 222. The first pressure gauge 227 is preferably an electric contact pressure gauge.

[0036] In some embodiments, the filter element smoke eliminator 22 is provided in two or more sets to enhance the smoke absorption effect. The filter element smoke eliminators 22 are connected in parallel, and the specific number can be set according to actual needs.

[0037] Combination Figure 7 In some preferred embodiments, the smoke filtration system 2 further includes a flame detector 23 and a fire extinguishing system 24. The flame detector 23 is connected to the filter container housing 221. The fire extinguishing system 24 is connected to the filter container housing 221 through a gas pipeline 25. The fire extinguishing system 24 includes a fire extinguishing container connected to the gas pipeline 25. The gas pipeline 25 is connected with a pneumatic valve 251 for controlling the on and off of the fire extinguishing container and a second pressure gauge 252 for detecting the internal pressure of the fire extinguishing container. When the flame detector 23 detects dust explosion in the filter container cavity, the pneumatic valve 251 of the fire extinguishing system 24 will be controlled by the control system to start, and the flame retardant will be sprayed to extinguish the fire. The contents in the fire extinguishing container mainly include NaCl, graphite, quicklime, and argon, and the fire extinguishing container has a certain pressure. Under the action of pressure, the fire extinguishing substance is sprayed into the filter container cavity.

[0038] See again Figure 1 In this embodiment, the smoke elimination device also includes an explosion-proof control cabinet 8, which is provided with an air inlet and an air delivery port. The smoke elimination filter system 2 is placed in the explosion-proof control cabinet 8. The explosion-proof control cabinet 8 can not only integrate the distribution of the electric control, but also prevent other personnel from accidentally touching the valves or switches of the smoke elimination filter system 2. At the same time, it can also play the role of explosion buffer. When the smoke elimination filter system 2 has a dust explosion, the explosion-proof control cabinet 8 made of explosion-proof grade materials can play a buffering role. Furthermore, the explosion-proof control cabinet 8 is provided with an openable and closable door 81 to facilitate the installation and maintenance of internal accessories, and is provided with a ventilation grille 82 and a ventilation fan 83 to ensure the cleanliness of the internal air.

[0039] It can be understood that in this embodiment, the connection between the shell and the pipeline, as well as the connection between the pipelines are all detachable connection structures, and hook flanges, clamps and other connection structures can be used, and sealing structures such as sealing rings need to be installed at the connections to ensure the vacuum or inert gas atmosphere in the system.

[0040] During the actual operation, the smoke is mainly generated by the heating of the metal material in the crucible in the smelting equipment 1. With the continuous smelting, the smelting equipment 1 generates a large amount of smoke. Due to the suction of the rear-end fan 3, the original power of air intake and exhaust is formed. The smoke enters the condensation smoke eliminator 21 through the outlet pipe 4, forming the first smoke precipitation, and then enters the filter element smoke eliminator 22, forming the second smoke precipitation, and then enters the fan 3. After being discharged by the fan 3, it finally returns to the smelting equipment 1 through the intake pipe 5, forming a circulation process.

[0041] The smoke elimination device for vacuum furnace smelting provided in this embodiment can assist the smelting process of the vacuum system, and effectively ensure the continuity of the smelting process without destroying the atmosphere of the vacuum chamber. The smoke elimination and filtering system 2 can effectively ensure the adsorption of dust in the smoke by setting a two-stage smoke elimination structure of a condensing smoke eliminator 21 and a filter element smoke eliminator 22. By respectively setting a powder collection tank 216 and a visual window 217 in the condensing smoke eliminator 21 and the filter element smoke eliminator 22, the settled dust can be collected and processed in time. Furthermore, by setting a fire extinguishing system 24 and a flame detector 23, the occurrence of fire can be effectively detected, and fire extinguishing measures can be taken in time to ensure safe production.

[0042] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A fume elimination device for vacuum furnace smelting, characterized in that: include: A smoke eliminator and filter system (2) and a fan (3) are connected in series via a pipeline assembly, wherein the smoke eliminator and filter system (2) comprises a condensing smoke eliminator (21) and a filter element smoke eliminator (22) connected in series, wherein the condensing smoke eliminator (21) comprises a condensing container shell (211), wherein a cooler (212) is arranged in the condensing container shell (211), wherein the filter element smoke eliminator (22) comprises a filtering container shell (221), wherein a filter element (222) is arranged in the filtering container shell (221), wherein the condensing container shell (211) and the filtering container shell (221) are respectively connected to a powder collecting tank (216) via a pipeline, wherein a visual window (217) is arranged on the powder collecting tank (216).

2. The fume elimination device for vacuum furnace smelting according to claim 1, characterized in that: The pipeline is connected to a second valve body (2151) for controlling its on and off.

3. The fume elimination device for vacuum furnace smelting according to claim 1, characterized in that: The powder collecting tank (216) is detachably connected to the pipeline. The powder collecting tank (216) is provided with a collecting pipeline (218), and the collecting pipeline (218) is connected to a third valve body (2181).

4. The fume elimination device for vacuum furnace smelting according to claim 1, characterized in that: The condensing smoke eliminator (21) and / or the filter element smoke eliminator (22) are arranged in two or more sets, and smoke eliminators of the same type are arranged in parallel.

5. The fume elimination device for vacuum furnace smelting according to claim 1, characterized in that: The filter element smoke eliminator (22) further comprises a purge mechanism for performing water sweeping on the filter element (222).

6. The fume elimination device for vacuum furnace smelting according to claim 5, characterized in that: The purging mechanism comprises an inert gas buffer bag (223), wherein the inert gas buffer bag (223) is provided with a gas nozzle (224), and the gas nozzle (224) passes through the filter container shell (221) and faces the filter element (222).

7. The fume elimination device for vacuum furnace smelting according to claim 1, characterized in that: The filter element smoke eliminator (22) further comprises a first pressure transmitter (225) connected to the front end pipeline of the condensation smoke eliminator (21), a second pressure transmitter (226) connected to the rear end pipeline of the filter element smoke eliminator (22), and a first pressure gauge (227) connected to the pipeline of the filter element smoke eliminator (22).

8. The fume elimination device for vacuum furnace smelting according to claim 1, characterized in that: The smoke elimination and filtering system (2) further comprises a flame detector (23) and a fire extinguishing system (24); the flame detector (23) is connected to the filter container housing (221); and the fire extinguishing system (24) is connected to the filter container housing (221) via a gas pipeline (25).

9. The fume elimination device for vacuum furnace smelting according to claim 8, characterized in that: The gas delivery pipeline (25) is connected to a pneumatic valve (251) for controlling the on / off of the fire extinguishing container and a second pressure gauge (252) for detecting the internal pressure of the fire extinguishing container.

10. The fume elimination device for vacuum furnace smelting according to claim 1, characterized in that: The smoke elimination device also includes an explosion-proof control cabinet (8) for accommodating the smoke elimination filtering system (2), wherein the explosion-proof control cabinet (8) is provided with an openable and closable door (81) and a ventilation grille (82).

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