Flying dust collecting device for elemental arsenic sublimation furnace

Abstract

The utility model discloses a raised dust collecting device for an elemental arsenic sublimation furnace, which belongs to the field of raised dust collecting devices for sublimation furnaces, and comprises a heating platform, a sublimation bin and an exhaust device, the exhaust device comprises an exhaust pipe, a knife gate valve, an air pumping case, a first air pumping pipe, a butt joint elbow and a second air pumping pipe, by arranging the special suction and exhaust pipeline for the sublimation furnace and the suction and exhaust pipeline at the assembly position of the sublimation furnace, during use, one suction and exhaust pipeline directly sucks gas exhausted by the sublimation furnace through an elbow, and the other suction and exhaust pipeline sucks residual gas in the bin along the distribution in the bin, so that the gas generated during sublimation can be better sucked and exhausted, and the harm of harmful gas to workers is reduced; the closed sublimation bin is formed by arranging the side plates, the cover plate frame and the bin cover, the double exhaust pipes are arranged in the closed sublimation bin, the situation that the environment air contains trace toxins due to gas leakage can be further reduced, and the safety measure that the front bin door is not opened through internal exhaust purification can be achieved through linkage of the bin cover and the double exhaust pipes.

Description

Technical Field

[0001] The utility model belongs to the field of dust collecting devices for sublimation furnaces, in particular to a dust collecting device for a single substance arsenic sublimation furnace. Background Art

[0002] Arsenic is a non-metallic element that plays an important role in alloy manufacturing, pesticides and insecticides, pharmaceuticals, glass manufacturing, semiconductor and laser technology. Arsenic trioxide is often produced as waste gas during metal smelting and other processes. In order to increase its utilization rate, arsenic trioxide can be used to reduce elemental arsenic. During the reduction, arsenic trioxide needs to be sublimated, so a sublimation furnace is needed. During the reduction and sublimation process, arsenic trioxide is a highly toxic compound. Its toxicity mainly comes from its chemical structure and the reaction in the human body. When arsenic trioxide sublimes, it decomposes to produce arsenic. Elements and other compounds of arsenic trioxide will form highly toxic gases under certain conditions. In particular, when exposed to high heat, the gas generated by the sublimation of arsenic trioxide is highly toxic. Therefore, the gas discharged from the sublimation furnace needs to be collected and processed by a collection device. When the existing technology is used, it is simply to exhaust the gas from the sublimation furnace outlet. After the sublimation furnace is used, there will be residual harmful gases in the process of taking the furnace out and replacing the furnace, which is easy to cause harm to the staff. In addition, the existing sublimation furnace equipment mostly adopts an open sublimation chamber, which makes it easy for trace toxins to be contained in the ambient air, which is easy to cause harm to the staff. Utility Model Content

[0003] (1) Technical issues to be solved

[0004] In order to overcome the shortcomings of the existing technology, a dust collection device for a single-element arsenic sublimation furnace is proposed to solve the problem that when the existing technology is used, the exhaust gas is simply extracted from the outlet of the sublimation furnace. When the sublimation furnace is taken out and replaced after use, there will be residual harmful gases, which may easily cause harm to the workers.

[0005] Secondly, the invention aims to solve the problem that most existing sublimation furnace equipment adopts an open sublimation chamber, which causes trace toxins to easily be contained in the ambient air and easily causes harm to the workers.

[0006] (2) Technical solution

[0007] The utility model is realized by the following technical solution: The utility model proposes a dust collection device for a single-element arsenic sublimation furnace, the structure of which includes a heating platform, a sublimation chamber and an exhaust device. The sublimation chamber and the exhaust device are provided on the heating platform. The exhaust device is used for collecting dust from the sublimation chamber and exhausting the gas;

[0008] The exhaust equipment includes an exhaust pipe, a knife gate valve, an exhaust chassis, a first exhaust pipe, a docking elbow and a second exhaust pipe. There are more than one exhaust body inside the exhaust chassis. The exhaust body is connected to the exhaust pipe, the first exhaust pipe and the second exhaust pipe. The exhaust pipe is equipped with a knife gate valve. The first exhaust pipe and the second exhaust pipe are arranged at the connection between the exhaust chassis and the sublimation chamber away from the exhaust body end. The first exhaust pipe is arranged in the sublimation chamber. The first exhaust pipe is used for extracting and discharging gas in the sublimation chamber. The second exhaust pipe is assembled perpendicular to the exhaust chassis. There are more than one second exhaust pipe. The second exhaust pipe is connected to the exhaust port of the sublimation furnace through a docking elbow. The second exhaust pipe is used for extracting and discharging exhaust gas from the sublimation furnace.

[0009] Furthermore, the first exhaust pipe is located above the second exhaust pipe to prevent the residual gas in the pipe from being discharged backward or floating out after the second exhaust pipe is closed.

[0010] Furthermore, the first exhaust pipe is evenly provided with more than one exhaust port.

[0011] Furthermore, at least one group of the exhaust ports is opened toward the connection between the second exhaust pipe and the docking elbow.

[0012] Furthermore, more than one second exhaust pipe can be connected to the same exhaust body or multiple exhaust bodies, and the first exhaust pipe and more than one second exhaust pipe can also be connected to the same exhaust body or separately connected to multiple exhaust bodies. Multiple exhaust bodies are best to ensure the efficiency of exhaust gas and facilitate the control of different exhausts.

[0013] Furthermore, the second exhaust pipe includes a connecting rod, a hinged joint, a first cover plate, a docking groove and a tube body. The tube body is provided with a docking groove at the end away from the exhaust body. The tube body is connected to the docking elbow through the docking groove. The side end face of the tube body away from the exhaust body is equipped with a hinged joint. The side end face of the first cover plate is also equipped with a hinged joint. The hinged joint of the tube body is hinged to the hinged joint of the first cover plate through the connecting rod. The first cover plate is used to seal the end of the tube body away from the exhaust body.

[0014] Furthermore, the sublimation chamber includes an electric reel, a rope, a wire pulley, a chamber cover, a side panel, a cover frame and a protective platform. Side panels are fixed on both sides of one end of the connection between the exhaust box and the heating platform, and a protective platform is installed between the two side panels and the exhaust box and the heating platform. The two ends of the cover frame are respectively connected to the exhaust box and the heating platform, and the cover frame is arranged between the two side panels. The cover frame is used for positioning and supporting the chamber cover, and an electric reel is fixed on the exhaust box, and a wire pulley is fixed on the chamber cover. One end of the rope is fixedly connected to the electric reel, and the other end of the rope is fixed to the exhaust box after passing through the wire pulley. The fixing point of the rope to the exhaust box and the assembly point of the electric reel 2a are both higher than the wire pulley. The electric reel controls the opening and closing of the chamber cover by retracting and releasing the rope. The chamber cover is sealed between the two side panels, and one end of the chamber cover is hinged to the exhaust box.

[0015] Furthermore, the bin cover includes a first plate body, a first protective plate, a second protective plate, a second plate body and a pulley, one end of the first plate body is hinged to the exhaust case, the first plate body is hinged to the second plate body away from the exhaust case, a wire pulley is fixed to the top of the first plate body adjacent to the second plate body side, both ends of the second plate body away from the first plate body side are equipped with pulleys, the second plate body away from the first plate body end can slide on the cover frame through the pulley, a wire pulley is fixed to the top of the first plate body, the hinged end of the first plate body and the second plate body is equipped with a first protective plate, the hinged end of the second plate body and the first plate body is equipped with a second protective plate, the first protective plate and the second protective plate are used to protect the hinge when the first plate body and the second plate body are sealed.

[0016] Furthermore, the heating platform includes a platform body and a furnace groove. The furnace groove is provided on the top of the platform body. The furnace groove is used for assembling the sublimation furnace. The platform body is used for heating the furnace groove. The furnace groove is provided within the range formed by the two side panels and the protective platform.

[0017] Furthermore, the heating platform also includes a heat dissipation port, a second cover plate, a maintenance door plate and a step. The top of the platform body is equipped with a second cover plate, on which a heat dissipation port is provided. The side end surface of the platform body is also provided with a step and a maintenance door plate.

[0018] Furthermore, a sealing ring may be provided at the location where the first cover plate seals the tube body, and the sealing ring is made of rubber.

[0019] Furthermore, the number of the second exhaust pipes is at least equal to the number of the furnace slots.

[0020] (3) Beneficial effects

[0021] One of the above technical solutions has the following advantages or beneficial effects:

[0022] 1) In order to solve the problem that the existing technology only simply exhausts the gas from the sublimation furnace outlet, and residual harmful gases will exist during the process of replacing the sublimation furnace after use, which is easy to cause harm to the staff, a special exhaust pipe for the sublimation furnace and an exhaust pipe at the assembly point of the sublimation furnace are provided. When in use, one exhaust pipe directly extracts the gas discharged from the sublimation furnace through the elbow, and the other exhausts the residual gas in the warehouse along the distribution inside the warehouse, which can better extract the gas generated during sublimation, thereby reducing the harm of harmful gases to the staff.

[0023] 2) In order to solve the problem that most existing sublimation furnace equipment adopts an open sublimation chamber, which makes it easy for the ambient air to contain trace toxins and easily cause harm to the workers, a closed sublimation chamber is formed by providing side panels, a cover frame and a chamber cover. Combined with the double exhaust pipes in the chamber, it can further reduce the situation where gas leakage causes trace toxins in the ambient air. In addition, the linkage between the chamber cover and the double exhaust equipment can realize the safety measure of not opening the chamber door before the internal exhaust purification is completed, thereby ensuring safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Other features, objects and advantages of the present invention will become more apparent from the detailed description of the non-limiting embodiments with reference to the following drawings:

[0025] Figure 1 This is a schematic structural diagram of a dust collection device for a single-element arsenic sublimation furnace according to the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of the utility model after the bin cover is opened;

[0027] Figure 3 This is a schematic diagram of the structure of the utility model after the bin cover is removed;

[0028] Figure 4 For this utility model Figure 3 Schematic diagram of the enlarged structure of A;

[0029] Figure 5 This is a schematic structural diagram of the side view of the bin cover of the utility model;

[0030] Figure: Heating platform 1, sublimation chamber 2, exhaust equipment 3, platform body 1a, heat dissipation vent 1b, furnace groove 1c, second cover plate 1d, maintenance door panel 1e, ladder 1f, electric reel 2a, rope 2b, guide pulley 2c, chamber cover 2d, side panel 2e, cover frame 2f, protective platform 2g, exhaust pipe 3a, knife gate valve 3b, exhaust chassis 3c, first exhaust pipe 3d, docking elbow 3e, second exhaust pipe 3f, first plate 2d1, first protective plate 2d2, second protective plate 2d3, second plate 2d4, pulley 2d5, exhaust port 3d1, connecting rod 3f1, hinged joint 3f2, first cover plate 3f3, docking groove 3f4, pipe body 3f5. DETAILED DESCRIPTION

[0031] The present invention will be further described in detail below with reference to the embodiments, but the embodiments of the present invention are not limited thereto.

[0032] Implementation Plan 1:

[0033] The utility model provides a dust collection device for a single-substance arsenic sublimation furnace (not shown in the figure): the structure includes a heating platform 1, a sublimation chamber 2 and an exhaust device 3. The sublimation chamber 2 and the exhaust device 3 are provided on the heating platform 1. The exhaust device 3 is used for collecting dust from the sublimation chamber 2 and exhausting the gas.

[0034] The exhaust equipment 3 includes an exhaust pipe 3a, a knife gate valve 3b, an exhaust box 3c, a first exhaust pipe 3d, a docking elbow 3e and a second exhaust pipe 3f. The exhaust box 3c is provided with one or more exhaust bodies (not shown in the figure). The exhaust body (not shown in the figure) is connected to the exhaust pipe 3a, the first exhaust pipe 3d and the second exhaust pipe 3f. The exhaust pipe 3a is equipped with a knife gate valve 3b. The first exhaust pipe 3d and the second exhaust pipe 3f are far away from the exhaust body (not shown in the figure). It is located at the connection between the exhaust box 3c and the sublimation chamber 2. The first exhaust pipe 3d is arranged along the bottom of the connection between the exhaust box 3c and the sublimation chamber 2. The first exhaust pipe 3d is used to extract and discharge the gas in the sublimation chamber 2. The second exhaust pipe 3f is perpendicular to the exhaust box 3c. There are more than one second exhaust pipe 3f. The second exhaust pipe 3f is connected to the exhaust port of the sublimation furnace (not shown in the figure) through the docking elbow 3e. The second exhaust pipe 3f is used to extract and discharge the exhaust gas of the sublimation furnace (not shown in the figure).

[0035] Among them, the first exhaust pipe 3d is located above the second exhaust pipe 3f, which prevents the residual gas in the pipe from being discharged or drifting out after the second exhaust pipe 3f is closed, and better ensures the safety of the staff when opening the sublimation chamber to replace the sublimation furnace (not shown in the figure).

[0036] Among them, more than one exhaust port 3d1 is evenly provided on the first exhaust pipe 3d, and it is optimal that the number of the exhaust ports 3d1 is greater than or equal to the number of the second exhaust pipes 3f. When the number of the exhaust ports 3d1 is greater than or equal to the number of the second exhaust pipes 3f, at least one exhaust port 3d1 is provided above the second exhaust pipe 3f.

[0037] Among them, at least one group of the exhaust ports 3d1 is opened toward the connection between the second exhaust pipe 3f and the docking elbow 3e, so as to ensure that the residual or reversely discharged gas in the second exhaust pipe 3f can be better sucked.

[0038] Among them, more than one second exhaust pipe 3f can be connected to the same exhaust body (not shown in the figure) or multiple exhaust bodies (not shown in the figure), and the first exhaust pipe 3d and more than one second exhaust pipe 3f can also be connected to the same exhaust body (not shown in the figure) or separately connected to multiple exhaust bodies (not shown in the figure). Multiple exhaust bodies (not shown in the figure) are the best to ensure the efficiency of exhaust gas and facilitate the control of different exhausts.

[0039] Among them, the second exhaust pipe 3f includes a connecting rod 3f1, a hinged joint 3f2, a first cover plate 3f3, a docking groove 3f4 and a tube body 3f5. The tube body 3f5 is provided with a docking groove 3f4 at the end away from the exhaust body (not shown in the figure), and the tube body 3f5 is connected to the docking elbow 3e through the docking groove 3f4. The side end face of the tube body 3f5 away from the exhaust body (not shown in the figure) is equipped with a hinged joint 3f2, and the side end face of the first cover plate 3f3 is also equipped with a hinged joint 3f2. The hinged joint 3f2 of the tube body 3f5 is hinged to the hinged joint 3f2 of the first cover plate 3f3 through the connecting rod 3f1, and the first cover plate 3f3 is used to seal the end of the tube body 3f5 away from the exhaust body (not shown in the figure).

[0040] Among them, the sublimation chamber 2 includes an electric reel 2a, a rope 2b, a wire pulley 2c, a chamber cover 2d, a side panel 2e, a cover frame 2f and a protective platform 2g. The side panels 2e are fixed on both sides of one end of the connection between the exhaust box 3c and the heating platform 1. A protective platform 2g is assembled between the two side panels 2e and the exhaust box 3c and the heating platform 1. The two ends of the cover frame 2f are respectively connected to the exhaust box 3c and the heating platform 1. The cover frame 2f is arranged between the two side panels 2e. The cover frame 2f is used for positioning and supporting the chamber cover 2d. The electric reel is fixed on the exhaust box 3c. 2a, a wire pulley 2c is fixed on the bin cover 2d, one end of the rope 2b is fixedly connected to the electric reel 2a, and the other end of the rope 2b is fixed to the exhaust case 3c after passing through the wire pulley 2c. The fixing point of the rope 2b and the exhaust case 3c and the assembly point of the electric reel 2a are both higher than the wire pulley 2c, so as to ensure that the electric reel 2a can drive the wire pulley 2c to rise when the electric reel 2a reels the rope 2b. The electric reel 2a controls the opening and closing of the bin cover 2d by retracting and releasing the rope 2b. The bin cover 2d is sealed between the two side panels 2e, and one end of the bin cover 2d is hinged to the exhaust case 3c.

[0041] The bin cover 2d includes a first plate 2d1, a first protective plate 2d2, a second protective plate 2d3, a second plate 2d4 and a pulley 2d5. One end of the first plate 2d1 is hinged to the exhaust box 3c, and the end of the first plate 2d1 away from the exhaust box 3c is hinged to the second plate 2d4. A wire pulley 2c is fixed to the top of the first plate 2d1 adjacent to the side of the second plate 2d4. Both ends of the second plate 2d4 away from the first plate 2d1 are equipped with pulleys 2d5. The second plate body 2d4 can slide on the cover frame 2f through the pulley 2d5 away from the end of the first plate body 2d1. A wire pulley 2c is fixed on the top of the first plate body 2d1. The hinged end of the first plate body 2d1 and the second plate body 2d4 is equipped with a first protective plate 2d2. The hinged end of the second plate body 2d4 and the first plate body 2d1 is equipped with a second protective plate 2d3. The first protective plate 2d2 and the second protective plate 2d3 are used to protect the hinge when the first plate body 2d1 and the second plate body 2d4 are sealed.

[0042] The heating platform 1 includes a platform body 1a and a furnace groove 1c. The furnace groove 1c is provided on the top of the platform body 1a. The furnace groove 1c is used for assembling a sublimation furnace (not shown in the figure). The platform body 1a is used for heating the furnace groove 1c. The furnace groove 1c is provided within the range formed by the two side panels 2e and the protective platform 2g.

[0043] Among them, the heating platform 1 also includes a heat dissipation port 1b, a second cover plate 1d, a maintenance door plate 1e and a step 1f. The top of the platform body 1a is equipped with a second cover plate 1d, and the second cover plate 1d is provided with a heat dissipation port 1b. The side end surface of the platform body 1a is also provided with a step 1f and a maintenance door plate 1e.

[0044] The first cover plate 3f3 may further be provided with a sealing ring at the location where the tube body 3f5 is covered. The sealing ring is made of rubber so that the second exhaust pipe 3f can be better covered by the first cover plate 3f3 when not in use.

[0045] The number of the second exhaust pipes 3f is at least equal to the number of the furnace slots 1c, so as to ensure that the sublimated gas can be exhausted through the second exhaust pipes 3f when each furnace slot 1c is in use.

[0046] During the use of the device, when it is necessary to sublimate to obtain elemental arsenic, the elemental arsenic can be assembled into a sublimation furnace (not shown in the figure), and the sublimation furnace (not shown in the figure) can be assembled into the furnace slot 1c, and then the first cover plate 3f3 is flipped over by the connecting rod 3f1 and the hinge joint 3f2 to open the pipe mouth of the second exhaust pipe 3f, and then the exhaust port of the sublimation furnace (not shown in the figure) and the pipe mouth of the second exhaust pipe 3f are connected through the docking elbow 3e, and then the staff exits the sublimation warehouse 2 area, and controls the electric reel 2a to loosen the rope 2b to lower the warehouse cover 2d. After the electric reel 2a loosens the rope 2b, the warehouse cover 2d slides and closes on the cover frame 2f by its own weight and the pulley 2d5 provided. At this time, the sublimation furnace (not shown in the figure) in the furnace slot 1c is heated by the heating platform 1 to sublimate to obtain elemental arsenic. During sublimation, the exhaust equipment 3 can exhaust the gas generated during the sublimation of the sublimation furnace (not shown in the figure) through the second exhaust pipe 3f to the purification equipment (not shown in the figure) for purification and discharge, and through The directly connected exhaust can better ensure the exhaust pressure, reduce the leakage of gas from the sublimation furnace (not shown in the figure), and prevent the gas from causing harm. At the same time, the first exhaust pipe 3d can also be started synchronously to exhaust the gas in the warehouse to the purification equipment (not shown in the figure) for purification and discharge, to prevent the gas in the sublimation furnace (not shown in the figure) from leaking and causing residual gas in the environment to cause harm. The first exhaust pipe 3d can also be started before or when the sublimation warehouse 2 is opened to exhaust. Because the sublimation warehouse 2 is sealed by the warehouse cover 2d, side panels 2e, and cover frame 2f, it can better prevent the air in the sublimation warehouse 2 from leaking. In combination with the double exhaust pipes in the warehouse, one directly extracts the gas discharged from the sublimation furnace (not shown in the figure) through the docking elbow 3e, and the other is distributed along the sublimation warehouse 2 to extract the residual gas in the warehouse, which can better exhaust the gas during sublimation, thereby posing harm to the staff, and can further reduce the situation where the ambient air contains trace toxins caused by gas leakage, thereby ensuring safety in use.

[0047] When opening the cover, the rope 2b is wound up by the electric reel 2a. Because the other end of the rope 2b is fixed on the vacuum box 3c, when the electric reel 2a winds up the rope 2b, it will pull the wire wheel 2c through the middle of the rope 2b toward the lower point of the rope 2b fixing point and the electric reel 2a assembly point, so that the bin cover 2d equipped with the wire wheel 2c is driven and pulled up. When the bin cover 2d is driven and pulled up, the first plate 2d1 moves away from the hinged end with the vacuum box 3c and rises with the wire wheel 2c. At this time, the second plate 2d4 will bend through the hinge with the first plate 2d1 due to its own weight during the rising process. At the same time, the pulley 2d5 provided on the second plate 2d4 will slide on the cover frame 2f due to its own weight, ensuring smooth opening of the cover and reducing bumps and noise, realizing convenient opening of the cover, and has a simple structure, reduces failure rate, and facilitates subsequent inspection and maintenance.

[0048] Implementation Plan 2:

[0049] With the rest of the structure and implementation effects unchanged, the starting circuit of the electric reel 2a is connected in series with the starting circuit of the exhaust body (not shown in the figure) connected to the first exhaust pipe 3d, and a delay relay (not shown in the figure) is installed between the two starting circuits. The delay relay (not shown in the figure) is used to delay the opening of the electric reel 2a after the exhaust body (not shown in the figure) connected to the first exhaust pipe 3d is opened, so that the electric reel 2a must first open the exhaust body connected to the first exhaust pipe 3d to exhaust for a period of time before opening the chamber cover 2d, which can better prevent the toxic gas remaining outside the sublimation furnace (not shown in the figure) in the sublimation chamber 2 from causing harm to the staff.

[0050] In the description of the present invention, it should be noted that the terms "up", "down", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They 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 direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as a limitation on the present invention.

[0051] The control method of the present invention is to manually start and stop the switch. The wiring diagram of the power element and the provision of power supply are common knowledge in the field. Moreover, the present invention is mainly used to protect mechanical devices. Therefore, the control method and wiring arrangement are not explained in detail in the present invention.

[0052] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all perspectives, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and range of equivalents of the claims be included in the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0053] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A dust collection device for an elemental arsenic sublimation furnace, comprising a heating platform (1), a sublimation chamber (2), and an exhaust device (3), wherein the sublimation chamber (2) and the exhaust device (3) are provided on the heating platform (1), and the exhaust device (3) is used for collecting dust from the sublimation chamber (2) and for exhausting the gas; Its characteristics are: The exhaust device (3) comprises an exhaust pipe (3a), a knife gate valve (3b), an exhaust casing (3c), a first exhaust pipe (3d), a butt elbow (3e) and a second exhaust pipe (3f); the exhaust casing (3c) is provided with one or more exhaust bodies, the exhaust bodies are connected to the exhaust pipe (3a), the first exhaust pipe (3d) and the second exhaust pipe (3f); the exhaust pipe (3a) is equipped with a knife gate valve (3b); the first exhaust pipe (3d) and the second exhaust pipe (3f) are separated from each other. The exhaust body end is arranged at the connection between the exhaust box (3c) and the sublimation chamber (2); the first exhaust pipe (3d) is arranged in the sublimation chamber (2); the first exhaust pipe (3d) is used for exhausting gas in the sublimation chamber (2); the second exhaust pipe (3f) is assembled perpendicular to the exhaust box (3c); there are more than one second exhaust pipe (3f); the second exhaust pipe (3f) is connected to the exhaust port of the sublimation furnace through a docking elbow (3e); the second exhaust pipe (3f) is used for exhausting the exhaust gas of the sublimation furnace.

2. The dust collection device for an elemental arsenic sublimation furnace according to claim 1, characterized in that: The first air extraction pipe (3d) is located above the second air extraction pipe (3f).

3. The dust collection device for an elemental arsenic sublimation furnace according to claim 1, characterized in that: The first exhaust pipe (3d) is evenly provided with more than one exhaust port (3d1).

4. The dust collection device for an elemental arsenic sublimation furnace according to claim 3, characterized in that: At least one group of the exhaust ports (3d1) is opened toward the connection between the second exhaust pipe (3f) and the docking elbow (3e).

5. The dust collection device for an elemental arsenic sublimation furnace according to claim 1, characterized in that: More than one second exhaust pipe (3f) can be connected to the same exhaust machine or multiple exhaust machines, and the first exhaust pipe (3d) and more than one second exhaust pipe (3f) can also be connected to the same exhaust machine or separately connected to multiple exhaust machines.

6. The dust collection device for an elemental arsenic sublimation furnace according to claim 1, characterized in that: The second exhaust pipe (3f) includes a connecting rod (3f1), a hinged joint (3f2), a first cover plate (3f3), a docking groove (3f4) and a tube body (3f5). The tube body (3f5) is provided with a docking groove (3f4) at the end away from the exhaust body. The tube body (3f5) is connected to the docking elbow (3e) through the docking groove (3f4). The side end face of the tube body (3f5) away from the exhaust body is equipped with a hinged joint (3f2). The side end face of the first cover plate (3f3) is also equipped with a hinged joint (3f2). The hinged joint (3f2) of the tube body (3f5) is hinged to the hinged joint (3f2) of the first cover plate (3f3) through the connecting rod (3f1). The first cover plate (3f3) is used to seal the end of the tube body (3f5) away from the exhaust body.

7. The dust collection device for an elemental arsenic sublimation furnace according to claim 1, characterized in that: The sublimation chamber (2) includes an electric reel (2a), a rope (2b), a guide wheel (2c), a chamber cover (2d), a side panel (2e), a cover frame (2f) and a protective platform (2g). Side panels (2e) are fixed on both sides of one end of the connection between the vacuum box (3c) and the heating platform (1). A protective platform (2g) is installed between the two side panels (2e) and the vacuum box (3c) and the heating platform (1). The two ends of the cover frame (2f) are respectively connected to the vacuum box (3c) and the heating platform (1). The cover frame (2f) is arranged between the two side panels (2e). The cover frame (2f) is used for positioning and supporting the chamber cover (2d). An electric reel (2a) is fixed on the vacuum box (3c), and a wire pulley (2c) is fixed on the bin cover (2d). One end of the rope (2b) is fixedly connected to the electric reel (2a), and the other end of the rope (2b) passes through the wire pulley (2c) and is fixed to the vacuum box (3c). The fixing point of the rope (2b) and the vacuum box (3c) and the assembly point of the electric reel (2a) are both higher than the wire pulley (2c). The electric reel (2a) controls the opening and closing of the bin cover (2d) by retracting and releasing the rope (2b). The bin cover (2d) is sealed between the two side panels (2e), and one end of the bin cover (2d) is hinged to the vacuum box (3c).

8. The dust collection device for an elemental arsenic sublimation furnace according to claim 7, characterized in that: The bin cover (2d) includes a first plate (2d1), a first protective plate (2d2), a second protective plate (2d3), a second plate (2d4) and a pulley (2d5), one end of the first plate (2d1) is hinged to the vacuum box (3c), the end of the first plate (2d1) away from the vacuum box (3c) is hinged to the second plate (2d4), a wire pulley (2c) is fixed on the top of the first plate (2d1) adjacent to the side of the second plate (2d4), both ends of the second plate (2d4) away from the first plate (2d1) are equipped with pulleys (2d5), and the first plate (2d1) is hinged to the second plate (2d4) at one end. The second plate body (2d4) can slide on the cover frame (2f) via a pulley (2d5) away from the end of the first plate body (2d1); a guide wheel (2c) is fixed on the top of the first plate body (2d1); a first protective plate (2d2) is assembled at the hinged end between the first plate body (2d1) and the second plate body (2d4); a second protective plate (2d3) is assembled at the hinged end between the second plate body (2d4) and the first plate body (2d1); the first protective plate (2d2) and the second protective plate (2d3) are used to protect the hinged joint when the first plate body (2d1) and the second plate body (2d4) are sealed.

9. The dust collection device for an elemental arsenic sublimation furnace according to claim 7, characterized in that: The heating platform (1) comprises a platform body (1a) and a furnace groove (1c). The top of the platform body (1a) is provided with a furnace groove (1c). The furnace groove (1c) is used for assembling a sublimation furnace. The platform body (1a) is used for heating the furnace groove (1c). The furnace groove (1c) is provided within a range formed by the two side panels (2e) and the protective platform (2g).

10. The dust collection device for an elemental arsenic sublimation furnace according to claim 9, characterized in that: The heating platform (1) further comprises a heat dissipation port (1b), a second cover plate (1d), a maintenance door plate (1e) and a step (1f); the top of the platform body (1a) is equipped with a second cover plate (1d); the second cover plate (1d) is provided with a heat dissipation port (1b); and the side end surface of the platform body (1a) is also provided with a step (1f) and a maintenance door plate (1e).

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