Flow-guided fume treatment apparatus

Abstract

The present invention belongs to the field of additive manufacturing, and relates to a flow-guided fume treatment apparatus, comprising a wind direction guiding apparatus and a reaction chamber loaded with an inert material, wherein the interior of the reaction chamber is in a low-oxygen or oxygen-free environment; the reaction chamber is provided with a fume intake port, an exhaust port, a feed port and a slag discharge port, which are in communication with the reaction chamber; the wind direction guiding apparatus is arranged in the reaction chamber and extends towards the inert material; and metal fume to be treated enters the reaction chamber through the fume intake port and is then physically combined with the inert material, and the purified metal fume is discharged through the exhaust port. The present invention provides a flow-guided fume treatment apparatus which is easy to operate and can improve the forming efficiency.

Description

Guided flow dust treatment equipment Technical Field

[0001] This invention belongs to the field of additive manufacturing and relates to a dust treatment device, particularly a flow-guided dust treatment device. Background Technology

[0002] In the process of metal additive manufacturing, metal fumes containing metal powder particles and / or metal condensates (black slag) generated during the process are often produced. These fumes have a very low minimum ignition energy and are highly flammable. Therefore, special dust removal equipment is required to remove, collect, transfer, or store the dust in a safe environment.

[0003] Conventional dust removal methods primarily utilize an inert gas atmosphere to prevent dust from reacting with oxygen, thus preventing combustion by isolating the air. However, this type of dust removal device presents challenges in maintenance and poses safety hazards. Additionally, some dust removal methods work by simply filtering the metal fumes, separating the metal powder particles and / or the metal condensate (black slag) generated during the process from the gas before transporting and processing them. However, this method is prone to safety accidents.

[0004] In addition, there is a dust removal method that uses liquid passivation, which involves filling the dust collection bin / filter box with liquid such as water for passivation before proceeding with other maintenance steps. However, this method requires a lot of manpower and material resources and is not suitable for aluminum / aluminum alloy powder. Alternatively, natural incineration is also a common method, which involves placing the dust collection bin / filter box in a safe area and allowing it to react fully with oxygen to generate low-activity oxide dust. However, this method is highly dangerous, requires specific site conditions, is environmentally unfriendly, and results in the filter / dust collection bin being unusable or having a reduced lifespan. Summary of the Invention

[0005] In order to solve the above-mentioned technical problems in the background art, the present invention provides a flow-guided dust treatment device that is easy to operate and can improve safety.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A flow-guided dust treatment device, characterized in that: the flow-guided dust treatment device includes a wind-guided device and a reaction chamber loaded with inert materials; the reaction chamber is located in a low-oxygen or oxygen-free environment; the reaction chamber is provided with a dust inlet and an exhaust outlet, as well as a feed inlet and a slag discharge outlet, which are connected to the reaction chamber; the wind-guided device is placed inside the reaction chamber and extends towards the inert materials; the metal dust to be treated enters the reaction chamber through the dust inlet and is directly impacted by the wind-guided device or introduced into the inert materials to physically combine with the inert materials; the purified metal dust is discharged through the exhaust outlet.

[0008] The aforementioned airflow guidance device includes a baffle plate, an air duct, and / or a reverse pulse mechanism; the airflow guided by the airflow guidance device causes the inert material to disperse inside the reaction chamber, and the metal dust to be treated enters the reaction chamber through the dust inlet and then physically combines with the dispersed inert material.

[0009] The airflow guided by the aforementioned wind-guided device causes the inert material to disperse inside the reaction chamber in either method A or method B.

[0010] Method A is: clean inert airflow guided by wind guide equipment directly impacts or enters the inert material carried in the reaction chamber, causing the inert material to disperse inside the reaction chamber;

[0011] Method B is: the airflow of metal fumes to be treated, guided by a wind-guided device, directly impacts or enters the inert material carried in the reaction chamber, causing the inert material to disperse inside the reaction chamber.

[0012] When the aforementioned wind guidance device is an air duct, the bottom of the air duct has a conical structure.

[0013] The aforementioned flow-guided dust treatment equipment also includes an aeration device, which includes an aeration pipe and a fan connected to the aeration pipe; the aeration pipe extends into the reaction chamber; the fan blows clean inert gas or purified dust gas through the aeration pipe to form an impact airflow; the impact airflow enters the inert material to form a fluidized bed; the metal dust to be treated enters the reaction chamber through the dust inlet and then physically combines with the inert material in the fluidized bed.

[0014] The direction of the aforementioned impact airflow is either the same as or different from the direction of the metal fumes to be treated as they enter the reaction chamber through the fumes inlet.

[0015] The aeration equipment described above also includes an air distribution plate placed in the reaction chamber; the inert material is piled or laid on the air distribution plate; the air distribution plate is provided with air holes; the impact airflow passes through the air distribution plate into the inert material to form a fluidized bed of inert material.

[0016] The aforementioned flow-guided dust treatment equipment also includes a filter device placed inside the reaction chamber. The mixture generated after the metal dust to be treated physically combines with the inert material is intercepted by the filter device; the purified metal dust is discharged through the filter device and the exhaust port.

[0017] The aforementioned filtration devices are filter screens, filter cartridges, and / or cyclone separators.

[0018] The aforementioned reaction chamber is either an integral structure or a split structure; when the reaction chamber is a split structure, the reaction chamber includes a fixing component and a detachable component movably connected to the fixing component; the filter device is placed in the fixing component; the flow-guided dust treatment equipment also includes a high-level saturation sensor and a low-level saturation sensor disposed inside the reaction chamber.

[0019] The aforementioned diversion-type dust treatment equipment also includes a slag collection bucket connected to the slag discharge port, and a slag discharge port valve is provided between the slag collection bucket and the slag discharge port.

[0020] The advantages of this invention are:

[0021] This invention provides a flow-guided fume treatment device, including a wind-guided device and a reaction chamber loaded with inert material. The reaction chamber is located in a low-oxygen or oxygen-free environment. The reaction chamber is equipped with a fume inlet and an exhaust outlet, as well as a feed inlet and a slag discharge outlet, all communicating with the reaction chamber. The wind-guided device is placed inside the reaction chamber and extends towards the inert material. The metal fume to be treated enters the reaction chamber through the fume inlet and physically combines with the inert material. The purified airflow is discharged through the exhaust outlet. The flow-guided fume treatment device provided by this invention can guide the airflow to impact the inert material inside the reaction chamber, promoting the dispersion of the inert material and ensuring thorough mixing with the particulate matter in the metal fume to be treated. This avoids the safety risks associated with insufficient use of inert material and the transport of particulate matter in the metal fume. Attached Figure Description

[0022] Figure 1 is a schematic diagram of the structure of the guide-flow dust treatment device (top guide type) provided by the present invention;

[0023] Figure 2 is a schematic diagram of the structure of the flow-guided dust treatment equipment (clean airflow aeration type) provided by the present invention;

[0024] Figure 3 is a schematic diagram of the structure of the flow-guided dust treatment equipment (purified airflow aeration type) provided by the present invention;

[0025] Figure 4 is a schematic diagram of the structure of the flow-guiding dust treatment equipment (including auxiliary dust-raising pipe) provided by the present invention;

[0026] Figure 5 is a schematic diagram of the structure of the flow-guiding dust treatment device (including a reverse pulse mechanism) provided by the present invention;

[0027] Figure 6 is another structural schematic diagram of the flow-guided dust treatment device (purified airflow aeration type) provided by the present invention;

[0028] Figure 7 is a schematic diagram of the structure of the flow-guided dust treatment equipment (dust aeration type) provided by the present invention;

[0029] Figure 8 is a schematic diagram of another structure of the flow-guided dust treatment device (dust aeration type) provided by the present invention;

[0030] Figure 9 is a schematic diagram of the structure of the flow-guided dust treatment device (dust blowing type) provided by the present invention;

[0031] Wherein: 1-Reaction chamber; 2-Inerting agent; 3-Fume inlet; 4-Exhaust outlet; 5-Filter device; 6-Feeding port; 7-Slag discharge port; 8-Second differential pressure gauge; 9-First differential pressure gauge; 10-Slag discharge valve; 11-Slag collection bucket; 12-Guide plate; 13-Air distribution plate; 15-Aeration pipe; 16-Fan; 17-Auxiliary dust suppression pipe; 18-Reverse pulse mechanism; 19-Nozzle; 20-Baffle. Detailed Implementation

[0032] Referring to Figure 1, the present invention provides a flow-guided dust treatment device, including a wind-guided device and a reaction chamber 1 loaded with inert material 2; the reaction chamber 1 is in a low-oxygen or oxygen-free environment; the reaction chamber 1 is provided with a dust inlet 3 and an exhaust outlet 4, as well as a feed inlet 6 and a slag outlet 7 that communicate with the reaction chamber 1; the wind-guided device is placed inside the reaction chamber 1 and extends towards the inert material 2; the metal dust to be treated enters the reaction chamber 1 through the dust inlet 3 and then physically combines with the inert material 2, and the purified metal dust is discharged through the exhaust outlet 4.

[0033] Referring to Figures 1, 4, 5, and 9, the wind-guiding device provided by this invention comprises a guide plate 12, a guide duct (auxiliary dust-collecting duct 17), and / or a reverse pulse mechanism 18. The airflow guided by the wind-guiding device causes the inertite 2 carried in the reaction chamber 1 to disperse inside the reaction chamber 1. The metal fumes to be treated enter the reaction chamber 1 through the fume inlet 3 and physically combine with the dispersed inertite 2. The wind-guiding device introduces oxygen-free or low-oxygen into the reaction chamber 1 and directly impacts the inertite 2 carried inside the reaction chamber 1, especially impacting the upper surface of the inertite 2, directly promoting the dispersion of the inertite 2 and increasing the probability of contact between the metal fumes to be treated and the inertite. It should be noted that the inertite 2 includes, but is not limited to, calcium carbonate powder; it can be other powders, as long as they can be mixed with the metal particles of the metal fumes to reduce safety hazards, they are all objects selected by this invention.

[0034] For example, the air guiding device guides clean inert airflow or metal fumes to be treated into the reaction chamber 1. For example, the clean inert airflow can also be clean inert airflow after the metal fumes to be treated have been filtered. This airflow causes the inert material 2 to disperse inside the reaction chamber 1. After the metal fumes to be treated enter the reaction chamber 1 through the fume inlet 3, they physically combine with the dispersed inert material 2.

[0035] When the airflow guidance device is a baffle plate 12 and / or an air duct, the airflow guided by the airflow guidance device causes the inertite 2 to disperse inside the reaction chamber 1 in the following ways: Method A (guiding clean inert airflow), Method B (guiding the airflow of metal fumes to be treated), or Method C (guiding clean inert airflow of the metal fumes to be treated after filtration). Method A involves the airflow guidance device guiding clean inert airflow and injecting it into the reaction chamber 1, directly impacting or introducing the inertite 2 carried in the reaction chamber 1, causing the inertite 2 to disperse inside the reaction chamber 1. Method B involves the airflow guidance device guiding the airflow of the metal fumes to be treated into the reaction chamber 1, directly impacting or introducing the inertite 2 carried in the reaction chamber 1, causing the inertite 2 to disperse inside the reaction chamber 1. Method C involves the airflow guidance device guiding the airflow of the metal fumes to be treated, after filtration, into the reaction chamber 1, directly impacting or introducing the inertite 2 carried in the reaction chamber 1, causing the inertite 2 to disperse inside the reaction chamber 1. When the wind guidance device is the reverse pulse mechanism 18, the inerting material 2 is dispersed inside the reaction chamber 1 in mode D: the reverse pulse mechanism 18 is activated periodically or irregularly until it impacts the inerting material 2 inside the reaction chamber 1, causing the inerting material 2 to disperse inside the reaction chamber 1. For example, referring to Figure 4, an auxiliary dust-raising pipe 17 is located at the bottom of the reaction chamber 1 and connected to the inside of the reaction chamber 1. Compressed gas is blown into the inerting material 2 carried in the reaction chamber 1 through the auxiliary dust-raising pipe 17. After entering the reaction chamber 1, the compressed gas impacts the inerting material 2 inside the reaction chamber 1, causing the inerting material 2 to be dispersed within the reaction chamber 1 and forming a continuous dust-raising environment, which can further increase the probability of contact between the metal fumes to be treated and the inerting material, i.e., mode A as shown in Figure 4. For example, the compressed gas can be compressed argon or compressed nitrogen. Referring to Figure 7, the metal fumes to be treated enter the reaction chamber 1 through the fume inlet 3 and the auxiliary dust-raising pipe 17, directly impacting or being introduced into the inertite 2 carried in the reaction chamber 1. This causes the inertite 2 to disperse within the reaction chamber 1, forming a dust-raising environment, as shown in Figure 7 (Method B). Referring to Figure 6, the purified metal fumes are discharged through the exhaust port 4 and then directly enter the reaction chamber 1 through the auxiliary dust-raising pipe 17 and the aeration pipe 15, where they are embedded in the inertite 2. This causes the inertite 2 to disperse within the reaction chamber 1, forming a dust-raising environment, and thoroughly mixing with the metal fumes to be treated subsequently, as shown in Figure 6 (Method C). Regardless of the method used, the ultimate goal is to disperse the inertite 2 carried in the reaction chamber 1 within the reaction chamber 1, forming a dust-raising environment.Referring to Figure 5, when the auxiliary dust-generating component is the reverse pulse mechanism 18, the reverse pulse mechanism 18 is located outside the reaction chamber 1, especially inserted into the inert material 2, and continuously impacts the inert material 2 carried in the reaction chamber 1 in a pulse manner. After the reverse pulse mechanism 18 is periodically activated several times, the inert material 2 in the reaction chamber 1 is blown up, forming a continuous dust-generating environment. The reverse pulse activation cycle and number of times can be based on this: the time it takes for the blown inert material 2 to fall back to the bottom of the reaction chamber 1 is the reverse pulse activation cycle. For example, the reverse pulse mechanism 18 can be various commonly used or common types such as pneumatic impact cannons or pulse cannons, which will not be described in detail here.

[0036] The airflow guiding device is a baffle plate 12 and / or an air duct. For example, when the airflow guiding device uses a baffle plate 12, as shown in Figure 1, it has an overall upper-guided structure. The baffle plate 12 is placed inside the reaction chamber 1 and extends towards the surface of the inert material 2. The metal fumes to be treated are introduced into the reaction chamber 1 from the top or near the top, and after passing through the fume inlet 3, are guided by the baffle plate 12 to the inert material 2, where they physically combine. The baffle plate 12 can be multiple parallel plate-like structures or parallel tubular structures. Through multiple baffle plates 12, the metal fumes to be treated, clean airflow, or inertized airflow after filtration of the metal fumes to be treated are diverted, thus forming a dispersed state. The flared opening with a bell-shaped nozzle also allows the metal fumes to be treated to extend outward through the flared opening, forming a dispersed state, and then impacting the inert material 2 carried in the reaction chamber 1, causing the inert material 2 to disperse and increasing the probability of contact between the metal fumes to be treated and the inert material. When the wind-guiding device is an air duct, the bottom of the air duct has a conical structure. Through this conical structure, the metal dust to be treated can be pressurized, directly impacting the inertite 2 and causing the inertite 2 to disperse rapidly, resulting in a more significant effect. For example, referring to Figure 6, the aeration pipe 15 extends directly into the reaction chamber 1 and is embedded in the inertite 2. In this case, the flow direction of the impacting airflow through the aeration pipe 15 is the same as the flow direction of the metal dust to be treated entering the reaction chamber 1 through the dust inlet 3. The impacting airflow through the aeration pipe 15 directly impacts the inertite 2 carried in the reaction chamber 1, causing the inertite 2 to be blown away and forming a continuous dust environment, which is then fully mixed with the metal dust to be treated. For example, a nozzle 19 is provided at the end of the aeration pipe 15. This nozzle 19 is a conventional fluidized bed inlet structure, mainly composed of a flared pipe and an orifice plate. Any structure with uniform flow distribution function is acceptable; the specific structure is not within the scope of this invention. Its position can be in the central region of the reaction chamber 1, but more preferably slightly off-center, which can cause the inertite 2 in the reaction chamber 1 to form a circulation, increasing the possibility of the inertite 2 being blown away and making it more conducive to the formation of a dusty environment. Of course, when impacting the inertite 2, the metal dust to be treated can also be directly divided into two paths, one through a branch pipe and the other through a main injection pipe. The diameter of the branch pipe is significantly smaller than that of the main injection pipe, as shown in Figure 7. When the metal dust to be treated passes through the branch pipe, due to its small diameter and relatively fast flow rate, the metal dust to be treated in the branch pipe (small diameter, high flow rate, so it arrives first) will impact the inertite 2 in advance, causing the inertite 2 to be blown away and forming a continuous dusty environment, and then it will be fully mixed with the metal dust to be treated in the main injection pipe (large diameter, low flow rate, so it arrives later).Referring to Figure 8, another implementation of the present invention utilizes the impact of the metal fumes to be treated on the inert material 2, causing the inert material 2 to be blown away and forming a continuous dust environment. The fume inlet 3 extends into the reaction chamber 1 from below, and its end is equipped with a baffle 20. The baffle 20 is used to guide the metal fumes to be treated blown in by the fume inlet 3 from bottom to top to blow away the inert material 2 at the bottom of the reaction chamber 1 from top to bottom. The baffle 20 can be replaced with other baffles, but a conical shape is preferred. The outer surface of the conical baffle is not easily covered by fumes, and the fumes falling on it can slide down its conical surface into the reaction chamber 1. Referring to Figure 9, another implementation of the present invention utilizes the impact of the metal fume to be treated on the inert material 2 to cause the inert material 2 to be blown away and form a continuous dust environment. The metal fume inlet 3 extends into the reaction chamber 1 from above and directly impacts the inert material 2 carried by the reaction chamber 1 through the auxiliary dust blowing pipe 17, causing the inert material 2 to be blown away and forming a continuous dust environment.

[0037] Referring to Figures 2 and 3, the flow-guided dust treatment device provided by the present invention further includes an aeration device, which includes an aeration pipe 15 and a blower 16 connected to the aeration pipe 15; the aeration pipe 15 extends into the reaction chamber 1; the blower 16 draws clean inert airflow (as shown in Figure 2, the overall structure is a clean airflow aeration type) or inert airflow after the metal dust to be treated has been filtered (as shown in Figure 3, the overall structure is a purified airflow aeration type) through the aeration pipe 15 to form an impact airflow; the impact airflow enters the inert material 2 carried in the reaction chamber 1, forming a fluidized bed of inert material 2; the metal dust to be treated enters the reaction chamber 1 through the dust inlet 3 and then physically combines with the inert material 2 in the fluidized bed; preferably, in order to fully disperse the inert material 2, the direction of the impact airflow and the direction of the metal dust to be treated entering the reaction chamber 1 through the dust inlet 3 can be either opposite or the same. For example, taking the structure shown in Figure 2 as an example, an air distribution plate 13 is also provided inside the reaction chamber 1, and the inert material 2 is piled or laid on the air distribution plate 13; the air distribution plate 13 is provided with air holes; the impact airflow passes through the air distribution plate 13 and enters the inert material 2 to form a fluidized bed of inert material 2, which can accelerate the dispersion of the inert material 2 on the air distribution plate 13, making it a fluidized bed, and further increasing the probability of contact between the metal dust to be treated and the inert material. For example, the air distribution plate 13 is preferably a perforated plate, used to evenly distribute the incoming metal dust to be treated at the bottom of the inert material 2 so as to uniformly fluidize it. The structure of the air distribution plate 13 is not limited, and it can also be an array of long strip openings or a pipe with an internal flow channel, as long as it can play a role in controlling the airflow direction and distributing the air. The air distribution holes on the air distribution plate 13 can also be asymmetrical, so that the air acting on the bottom of the inerting material 2 is appropriately deflected to one side, so as to generate swirling flow in the inerting material 2, causing the inerting material and additives to flow periodically, thereby improving the uniformity of dust mixing. The air distribution plate 13 can also be used with a filter screen, that is, a filter screen is superimposed on the upper / lower side of the air distribution plate 13 to prevent the inerting material from falling below the air distribution plate 13, so as to reduce the pressure drop in the air path and make the fluidization effect more uniform. For example, in addition to the inerting material 2, auxiliary filter additives and auxiliary filter element cleaning additives, such as plastic filter media, lightweight coarse particles, etc., can also be added to the air distribution plate 13 to improve the adsorption capacity of the metal dust to be treated, and the friction of the additives on the filter element can clean the filter element to a certain extent. Obviously, the present invention lays the inerting material 2 on the air distribution plate 13 to form a fluidized bed, thereby achieving the purpose of real-time inerting.

[0038] Referring to Figures 1, 2, and 3, the flow-guided dust treatment equipment provided by this invention further includes a filter device 5 placed inside the reaction chamber 1. The mixture generated after the metal dust to be treated physically combines with the inerting agent 2 is intercepted by the filter device 5; the purified metal dust is discharged through the filter device 5 and the exhaust port 4. Exemplarily, the filter device 5 can be a filter screen, filter element, and / or cyclone separator, but regardless of the structure, any conventional or non-standard device that can separate the airflow and the mixture generated after physical combination can be selected.

[0039] The reaction chamber 1 used in this invention can be an integral structure or a split structure. Taking the structure shown in Figure 1 as an example, when the reaction chamber 1 used in this invention is an integral structure, the reaction chamber 1 is respectively provided with a feeding port 6 and a slag discharge port 7 that communicate with the interior of the reaction chamber 1. Inert material 2 can be added to the reaction chamber 1 through the feeding port 6. At the same time, the mixture generated after physical bonding can be directly discharged or discharged after centralized treatment through the slag discharge port 7. Exemplarily, the slag discharge port 7 can also be replaced with a slag collection bucket 11 at the bottom of the reaction chamber 1. A slag discharge valve 10 is provided between the slag collection bucket 11 and the reaction chamber 1. By opening and closing the slag discharge valve 10, the mixture generated after physical bonding can be discharged into the slag collection bucket 11, and then transferred or further processed. Obviously, the discharge method of the mixture generated after physical bonding is not unique. That is, it can be discharged through the slag discharge port 7; or the mixture generated after physical bonding can be collected in the slag collection bucket 11, and then the slag collection bucket 11 can be replaced as a whole. When the reaction chamber 1 is a split structure, the reaction chamber 1 includes a fixed part and a detachable part that is movably connected to the fixed part; the filter device is placed in the fixed part. Before physical bonding, the detachable part is disassembled and an appropriate amount of inert material 2 is filled into the detachable part. When physical bonding is completed, the detachable part containing the mixture generated after physical bonding is transferred or cleaned in an oxygen-free or low-oxygen environment.

[0040] Referring to Figure 1, the inerting agent 2 is pre-stored in the reaction chamber 1. Before physical bonding, the circulating air is activated. The circulating air enters from the flue gas inlet 3 at a lower speed than during operation, is guided by the guide plate 12, and blown along the inner wall of the reaction chamber 1 towards the inerting agent 2. The inerting agent 2 is then rolled up (blown away) and blown towards the filter device 5. After a layer of inerting agent 2 covers the filter device 5, operation begins. That is, the metal fumes to be treated are introduced into the reaction chamber 1 through the flue gas inlet 3 and guided by the guide plate 12. The metal fumes to be treated, together with the inerting agent 2 inside the reaction chamber 1, are blown onto the filter device 5. Under certain conditions (the filter device 5 is saturated, or the reaction chamber...), the process continues. Once the inerting agent 2 in reaction chamber 1 is completely blown away, or after a period of time when a layer of pure dust adheres to the filter device 5 (but the dust is not yet deep enough to penetrate the filter device 5), the intake of the metal dust to be treated from the dust inlet 3 is stopped, and the filter device 5 is cleaned (by backflushing the filter device 5, i.e., using a strong airflow to blow the filter device 5 in the opposite direction to make the adhering material on the filter device 5 fall off; other methods such as mechanical scraping or mechanical vibration can also be used), the mixture formed by the inerting agent 2 on the filter device 5 and the metal particles in the metal dust to be treated falls back into reaction chamber 1. It should be noted that the cleaning of the filter device 5 does not interrupt the purification process of the metal dust, avoiding problems such as machine shutdown caused by insufficient inerting agent 2 or frequent backflushing, and directly improving the dust treatment efficiency, improving the printing quality and efficiency of parts. After the mixture formed by the inerting agent 2 on the filter device 5 and the metal particles in the fumes to be treated is cleaned back into the reaction chamber 1, the fumes to be treated are reintroduced through the fume inlet 3, and the aforementioned process is repeated until the inerting agent 2 is fully utilized or completely combined with the metal particles in the fumes to be treated. Then, the mixture formed by the inerting agent 2 and the metal particles in the fumes to be treated is removed, and new pure inerting agent 2 is added to start a new round of fumes purification. Referring to Figure 2, the flow-guided fume treatment equipment also includes a first differential pressure gauge 9 for monitoring the pressure difference between the slag-gas mixture inlet pipe and the gas outlet pipe, and a second differential pressure gauge 8 for monitoring the pressure difference between the treated area and the treated area. The second differential pressure gauge 8 detects the pressure difference across the filter element. When this pressure difference is too large, the filter element needs to be cleaned by air blowing, ultrasonic waves, a vibrating motor, or mechanical vibration. The first differential pressure gauge 9 monitors the pressure difference between the slag-gas mixture inlet pipe and the gas outlet pipe. By controlling the fan speed, it ensures that the pressure changes at the inlet and outlet of the dust removal device are minimal, thus achieving a stable flow field in the forming chamber. For example, the shape of the reaction chamber 1 is not limited; it can be square or circular, and it may or may not have internal baffles. It should be noted that the metal fumes to be treated flow using an inert gas carrier, powered by a fan or air pump.The dust treatment equipment provided by this invention can be used without stopping the machine. As long as there is metal dust to be treated, the metal particles (black slag) in the metal dust can be treated in a timely and effective manner.

[0041] For example, the flow-guided dust treatment device provided by the present invention further includes a high-level saturation sensor and a low-level saturation sensor disposed inside the reaction chamber 1; the low-level saturation sensor and the high-level saturation sensor are used to detect the black slag content in the mixture of pre-coating inert material and black slag, and at the same time to detect whether there is pre-coating or black slag at that location. For example, the present invention preferably uses an impedance spectroscopy sensor.

Claims

1. A flow-guided dust treatment device, characterized in that: The flow-guided dust treatment equipment includes a wind-guided device and a reaction chamber (1) containing inert material (2); the reaction chamber (1) is in a low-oxygen or oxygen-free environment; the reaction chamber (1) is provided with a dust inlet (3) and an exhaust outlet (4) communicating with the reaction chamber (1), as well as a feed inlet (6) and a slag outlet (7); the wind-guided device is placed inside the reaction chamber (1) and extends towards the inert material (2); the metal dust to be treated enters the reaction chamber (1) through the dust inlet (3) and then physically combines with the inert material (2), and the purified metal dust is discharged through the exhaust outlet (4).

2. The flow-guiding dust treatment equipment according to claim 1, characterized in that: The airflow guided by the wind guide device causes the inert material (2) to disperse inside the reaction chamber (1). The metal dust to be treated enters the reaction chamber (1) through the dust inlet (3) and then physically combines with the dispersed inert material (2). Preferably, the wind guide device is a baffle plate (12), a duct and / or a reverse pulse mechanism (18).

3. The flow-guiding dust treatment equipment according to claim 2, characterized in that: The flow-guided dust treatment equipment also includes a filter device (5) placed inside the reaction chamber (1). The clean airflow after the condensed particles and inert substances (2) in the metal dust to be treated are purified by the filter device (5) is discharged through the exhaust port (4).

4. The flow-guiding dust treatment equipment according to claim 3, characterized in that: The filtration device (5) is a filter screen, a filter element and / or a cyclone separator.

5. The flow-guiding dust treatment equipment according to claim 4, characterized in that: When the wind guidance device is a wind duct, the bottom of the wind duct has a conical structure.

6. The flow-guiding dust treatment device according to any one of claims 1-5, characterized in that: The flow-guided dust treatment equipment also includes an aeration device, which includes an aeration pipe (15) and a blower (16) connected to the aeration pipe (15). The aeration pipe (15) extends into the reaction chamber (1). The blower (16) passes clean inert gas or purified dust gas through the aeration pipe (15) to form an impact airflow. The impact airflow enters the inert material (2) to form a fluidized bed. The metal dust to be treated enters the reaction chamber (1) through the dust inlet (3) and then physically combines with the inert material (2) in the fluidized bed.

7. The flow-guiding dust treatment device according to claim 6, characterized in that: The direction of the impact airflow is either the same as or different from the direction of the metal dust to be treated entering the reaction chamber (1) through the dust inlet (3).

8. The flow-guiding dust treatment device according to claim 7, characterized in that: The aeration device also includes a wind distribution plate (13) placed in the reaction chamber (1); the inert material (2) is piled or laid on the wind distribution plate (13); the wind distribution plate (13) is provided with air holes; the impact airflow passes through the wind distribution plate (13) into the inert material (2) to form a fluidized bed of the inert material (2).

9. The flow-guiding dust treatment device according to any one of claims 1-5, characterized in that: The flow-guided dust treatment equipment also includes a slag collection bucket (11) connected to the slag discharge port (7), and a slag discharge valve (10) is provided between the slag collection bucket (11) and the slag discharge port (7).

10. The flow-guiding dust treatment device according to any one of claims 1-5, characterized in that: The flow-guided dust treatment equipment also includes a high-level saturation sensor and a low-level saturation sensor installed inside the reaction chamber (1).

Images