A wet dust removal system for magnesium-containing dust

Abstract

The utility model discloses a kind of wet dust removal systems of magnesium-containing dust, comprising: dust removal pipeline is equipped with water supply pipe, water supply pipe is connected with the shower head of several outlets all located in dust removal pipeline, the opposite sides of dust removal pipeline are equipped with several air inlet pipes, the bottom of dust removal pipeline is equipped with drain pipe;Negative pressure component includes air extraction pipe and fan, the inlet of air extraction pipe connects the one end of dust removal pipeline, the outlet of air extraction pipe connects fan, the inlet cross-sectional area of air extraction pipe is greater than the outlet cross-sectional area of air extraction pipe, the inlet central axis of air extraction pipe is below the outlet central axis of air extraction pipe;Circulation component includes waste water pipe, reflux pipe, water storage tank, waste water pipe is connected in drain pipe lower, waste water pipe one end is equipped with reflux pump, reflux pipe connects reflux pump and water storage tank, waste water pipe is equipped with filter screen, lye pipe, water replenishing pipe and water supply pipe are all connected water storage tank.The utility model is safe and reliable in operation, energy saving and environmental protection, and can effectively reduce maintenance frequency.

Description

Technical Field

[0001] This utility model relates to the field of dust removal systems, and in particular to a wet dust removal system for magnesium dust. Background Technology

[0002] In the field of metal processing, especially in the grinding and cutting processes of magnesium products and magnesium alloy products, a large amount of magnesium dust is generated. If a large amount of magnesium dust floating in the air is inhaled, it will affect the health of the human body, and magnesium dust floating in the air poses a safety hazard of explosion.

[0003] Traditional technologies typically use exhaust fans to extract and purify dust from the environment. However, when collecting magnesium-containing dust, the collision between the fan blades and magnesium particles can easily generate sparks that could trigger an explosion, posing a significant explosion risk. Related technologies use wet dust collection systems with water curtains to purify magnesium-containing dust by settling. However, prolonged contact between the settled magnesium-containing dust and water can generate a large amount of hydrogen gas, and the accumulation of large amounts of hydrogen gas also poses a significant safety hazard. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a wet dust removal system for magnesium-containing dust, which provides stable and reliable dust removal performance, effectively reduces hydrogen production, and is safe and reliable.

[0005] A wet dust removal system for magnesium-containing dust according to an embodiment of the present invention includes:

[0006] The dust removal duct extends horizontally. A water supply pipe is installed at the top of the dust removal duct, which is connected to several spray heads with outlets located inside the dust removal duct. Several air inlet pipes are installed on opposite sides of the dust removal duct, and a drain pipe is installed at the bottom of the dust removal duct.

[0007] The negative pressure assembly includes an exhaust pipe and a fan. The inlet of the exhaust pipe is connected to one end of the dust removal pipe, and the outlet of the exhaust pipe is connected to the exhaust side of the fan. The cross-sectional area of ​​the inlet of the exhaust pipe is larger than the cross-sectional area of ​​the outlet of the exhaust pipe, and the central axis of the inlet of the exhaust pipe is located below the central axis of the outlet of the exhaust pipe.

[0008] The circulation assembly includes a wastewater pipe, a return pipe, a water storage tank, an alkali pipe, and a water supply pipe. The wastewater pipe is connected to the drain pipe. One end of the wastewater pipe is equipped with a return pump. The two ends of the return pipe are connected to the return pump and the water storage tank, respectively. The wastewater pipe is equipped with a filter screen that separates the drain pipe and the return pump. The alkali pipe, the water supply pipe, and the water supply pipe are all connected to the water storage tank.

[0009] In this embodiment, a stirring paddle is rotatably connected to the water storage tank, and the stirring paddle is connected to a motor located outside the water storage tank.

[0010] In this embodiment, the end of the alkali pipe furthest from the water storage tank is connected to a weak alkali storage tank.

[0011] In this embodiment, an ultraviolet light-emitting module is provided in the extraction pipe, and the inner wall of the extraction pipe is covered with a titanium dioxide layer.

[0012] In this embodiment, an exhaust filter is provided in the exhaust pipe between the fan and the dust removal pipe.

[0013] In this embodiment, an exhaust gas processor is connected to the exhaust side of the fan.

[0014] In this embodiment, the filter screen is located at the connection between the wastewater pipe and the drain pipe.

[0015] In this embodiment, the air inlet pipe is inclined to the horizontal plane, the top end of the air inlet pipe is connected to the dust removal pipe, and the bottom end of the air inlet pipe is connected to the dust collection hood.

[0016] The embodiments of this utility model have at least the following beneficial effects:

[0017] The system uses spray nozzles in conjunction with a negative pressure assembly to purify magnesium-containing dust through sedimentation. The airflow path in the extraction pipe narrows upwards, and utilizing the principle of inertial separation, the water mist airflow collides with the pipe wall during its ascent and flows back into the dust collection pipe. This effectively reduces both the probability of water vapor and magnesium-containing dust entering the fan, thus extending the fan's lifespan and ensuring safe and reliable system operation. A continuous supply of alkali solution to the storage tank via an alkali solution pipe significantly reduces hydrogen production during wet dust collection, effectively improving safety. Wastewater is recycled back to the storage tank via a return pump and return pipe for reuse, improving water resource utilization, saving energy, and further reducing hydrogen production, while also providing good explosion-proof safety. Furthermore, a filter screen installed in the wastewater pipe effectively intercepts particulate matter, reducing the risk of spray nozzle clogging, improving the reliability of the wet dust collection function, and reducing maintenance frequency. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a three-dimensional structural schematic diagram of a wet dust removal system for magnesium-containing dust according to an embodiment of the present utility model.

[0020] Figure 2 This is a three-dimensional structural schematic diagram of a wet dust removal system for magnesium-containing dust according to an embodiment of the present invention, viewed from another perspective.

[0021] Figure 3This is a top view schematic diagram of a wet dust removal system for magnesium-containing dust according to an embodiment of the present invention.

[0022] Figure 4 For along Figure 3 A schematic diagram of the cross-sectional structure of line A-A';

[0023] Figure 5 For along Figure 3 A schematic diagram of the cross-sectional structure of B-B'.

[0024] Figure label:

[0025] Dust removal pipe 100, water supply pipe 110, spray head 120, air inlet pipe 130, dust collection hood 131, drain pipe 140;

[0026] Negative pressure component 200, exhaust pipe 210, exhaust filter 211, titanium dioxide layer 212, fan 220, ultraviolet light emission module 230, exhaust gas processor 240;

[0027] The components include: circulation component 300, wastewater pipe 310, filter screen 311, return pipe 320, return pump 321, water storage tank 330, stirring paddle 331, motor 332, alkali solution pipe 340, weak alkali solution storage tank 341, and water replenishment pipe 350. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0029] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, left, right, front, and back, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] In the description of this utility model, if the wire sleeve or bracket is mentioned, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0031] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0032] In the metal processing industry, especially in the grinding and cutting processes of magnesium products and magnesium alloy products, a large amount of magnesium-containing dust is generated. Inhaling large amounts of this dust, which floats in the air, can affect human health and poses an explosion hazard. Traditionally, dust removal and purification in the environment typically involves using exhaust fans. However, in traditional dry dust collection systems, the collision between the fan blades and magnesium particles can easily generate sparks that could trigger an explosion, posing a significant risk. Related technologies use wet dust collection systems with water curtains to purify the magnesium-containing dust through sedimentation. However, this method results in the magnesium-containing dust, after prolonged contact with water, producing a large amount of hydrogen gas. Because the contact between magnesium-containing dust and water is not effectively controlled, the resulting accumulation of hydrogen gas also poses a significant safety hazard.

[0033] The following is for reference only. Figure 1 To be continued Figure 5 This invention describes a wet dust removal system for magnesium-containing dust, which has a stable and reliable dust removal effect and can effectively reduce hydrogen production, making it safe and reliable.

[0034] Reference Figures 1 to 5 A wet dust removal system for magnesium-containing dust according to an embodiment of this utility model includes:

[0035] The dust removal duct 100 extends horizontally. A water supply pipe 110 is provided at the top of the dust removal duct 100. Preferably, the water supply pipe 110 is located in the top area inside the dust removal duct 100. The water supply pipe 110 is connected to several spray heads 120, all of which have their outlets located inside the dust removal duct 100. The spray heads 120 are located in the top area inside the dust removal duct 100, and their outlets are located inside the dust removal duct 100. Preferably, the spray heads 120 are equipped with a solenoid valve structure, which can control the spraying action by switching them on and off. Several air inlet pipes 130 are provided on both sides of the dust removal duct 100. Several drain pipes 140 are provided at the bottom of the dust removal duct 100, and the top of the drain pipes 140 are connected to the dust removal duct 100.

[0036] The negative pressure component 200 includes an exhaust pipe 210 and a fan 220. Preferably, the fan 220 is an explosion-proof fan 220. The inlet of the exhaust pipe 210 is connected to one end of the dust removal pipe 100, and the outlet of the exhaust pipe 210 is connected to the exhaust side of the fan 220. The cross-sectional area of ​​the inlet of the exhaust pipe 210 is larger than the cross-sectional area of ​​the outlet of the exhaust pipe 210. The central axis of the inlet of the exhaust pipe 210 is located below the central axis of the outlet of the exhaust pipe 210. Both the central axis of the inlet and the central axis of the outlet of the exhaust pipe 210 are parallel to the horizontal plane, that is, along the direction of airflow, the cross-sectional area of ​​the exhaust pipe 210 continuously narrows upward. By pulling upward and narrowing the outlet of the exhaust pipe 210, water vapor can be effectively blocked, thereby significantly reducing the probability of water vapor reaching the fan 220 for discharge, and thus effectively extending the service life of the fan 220.

[0037] The circulation component 300 includes a wastewater pipe 310, a return pipe 320, a water storage tank 330, an alkali solution pipe 340, and a water supply pipe 350. The alkali solution pipe 340 supplies alkali solution to the water storage tank 330. The wastewater pipe 310 is connected to each drain pipe 140, specifically, the bottom end of the drain pipe 140 is connected to the top of the wastewater pipe 310. One end of the wastewater pipe 310 is equipped with a return pump 321. The two ends of the return pipe 320 are respectively connected to the return pump 321 and the water storage tank 330. That is, one end of the wastewater pipe 310 is connected to the return pipe 320 through the return pump 321, and the return pump 321 is connected to the water storage tank 330 through the return pipe 320. The return pump 321 is used to pump the wastewater in the wastewater pipe 310 to the water storage tank 330 through the return pipe 320. The wastewater pipe 310 has a separator between the wastewater pipe 310 and the drain pipe 350. The filter screen 311 between pipe 140 and return pump 321 effectively isolates large particles, thereby effectively preventing material blockage of circulation component 300 or spray head 120 and effectively reducing maintenance frequency. Alkali pipe 340, water supply pipe 350 and water supply pipe 110 are all connected to water storage tank 330. Preferably, alkali pipe 340, water supply pipe 350 and return pipe 320 are all connected to the top of water storage tank 330, and the top of water supply pipe 110 is connected to the bottom of water storage tank 330. Under the action of gravity, water storage tank 330 can provide water flow to water supply pipe 110. The reaction between alkali and magnesium can generate magnesium hydroxide, thereby effectively reducing the generation of hydrogen and significantly improving the safety of this wet dust removal system. Water supply pipe 350 is connected to external tap water pipe.

[0038] The magnesium-containing dust is purified by settling through the spray head 120 and the negative pressure component 200. The horizontally extended dust collection pipe 100 effectively increases the contact between the magnesium-containing dust and the dust collection liquid, thus improving the wet dust removal effect. Furthermore, the airflow path of the extraction pipe 210 narrows upwards. Utilizing the principle of inertial separation, the water mist airflow collides with the pipe wall during its ascent and flows back into the dust collection pipe 100. This not only effectively reduces the probability of water vapor entering the fan 220 but also reduces the probability of magnesium-containing dust entering the fan 220, thereby effectively extending the service life of the fan 220 and improving safety. Alkali solution is continuously supplied to the water storage tank 330 through the alkali solution pipe 340. The alkaline liquid is sprayed from the water storage tank 330 through the water supply pipe 110 into the dust collection pipe 100 from the spray head 120. The magnesium-containing dust can effectively settle into magnesium hydroxide during the wet dust removal process. In this system, hydrogen production can be significantly reduced, effectively improving the safety performance of wet dust removal. Wastewater is circulated to the storage tank 330 via the return pump 321 and return pipe 320 for reuse, which not only effectively improves water resource utilization and saves energy and protects the environment, but also ensures that the waste liquid after solid-liquid separation is discharged in a timely manner, further reducing hydrogen production and providing good explosion-proof safety performance. In addition, by setting a high-mesh filter screen 311 in the wastewater pipe 310, particulate matter can be effectively intercepted, which can effectively reduce the risk of clogging of the spray head 120, effectively improve the reliability of the wet dust removal function of the system, and effectively reduce the maintenance frequency. Since the storage tank 330 is located at a high position in the system, it uses gravity to supply water naturally, reducing water pump energy consumption. The reuse rate of filtered wastewater exceeds 80%, and the water replenishment volume is only 20% of that of traditional systems, which can effectively reduce the operating cost of dust removal.

[0039] It is understandable that a stirring paddle 331 is rotatably connected to the water storage tank 330, and the stirring paddle 331 is connected to a motor 332 located outside the water storage tank 330. By mixing the materials in the water storage tank 330 with the stirring paddle 331, the uniformity of the dust removal liquid sprayed by the spray head 120 can be effectively improved, local pH fluctuations of the dust removal liquid can be avoided, and the dust removal liquid can effectively react with magnesium dust when used for dust removal, thereby improving the dust removal effect in each area of ​​the dust removal pipeline 100.

[0040] Specifically, the agitator 331 adopts a double-layer spiral blade design, with the upper blade rotating clockwise and the lower blade rotating counterclockwise, which can form a three-dimensional vortex mixing effect.

[0041] Understandably, the end of the alkali pipe 340 furthest from the water storage tank 330 is connected to a weak alkali storage tank 341. Preferably, the weak alkali storage tank 341 is used to store a sodium hydroxide solution with a molar concentration of 5-10%. Sodium hydroxide reacts with magnesium to produce sodium and magnesium hydroxide, which can effectively improve the safety of dust removal treatment. The alkali pipe 340 is equipped with an alkali valve. The top end of the alkali pipe 340 is connected to the weak alkali storage tank, and the bottom end of the alkali pipe 340 is connected to the water storage tank 330. The supply of alkali can be controlled by controlling the opening and closing of the alkali valve through a controller.

[0042] According to actual application requirements, the water storage tank 330 can be equipped with an online pH monitoring probe. Based on the detected pH value, the opening degree of the alkali valve can be controlled, effectively controlling the effectiveness of the weak alkali supply. Preferably, the water supply pipe 350 is equipped with a water supply valve, which is used to control the flow of tap water in the water supply pipe 350; the water supply pipe 110 is equipped with a water supply valve, which is used to drive the flow of liquid in the water supply pipe 110.

[0043] Understandably, the extraction pipe 210 is equipped with an ultraviolet light-emitting module 230, and the inner wall of the extraction pipe 210 is covered with a titanium dioxide layer 212. Preferably, the ultraviolet lamp is a low-temperature ultraviolet lamp with an operating temperature below 60°C, which can effectively improve the safety of the overall wet dust removal system. The ultraviolet light emitted by the ultraviolet light-emitting module can catalyze the reaction of hydrogen and oxygen to synthesize water, and can also catalytically decompose the volatiles of cutting oil in the extraction pipe 210. In addition, ultraviolet light also has a good sterilization and anti-mildew effect, which can prevent biofilm formation and blockage of the pipeline.

[0044] It is understandable that the exhaust pipe 210 is equipped with an exhaust filter 211 located between the fan 220 and the dust removal pipe 100. The exhaust filter 211 can effectively isolate some impurities that have not completely settled and are mixed in the gas, thus preventing these impurities from reaching the fan 220 and affecting its working performance.

[0045] Understandably, the exhaust side of the fan 220 is connected to the exhaust gas processor 240. The exhaust filter 211 in front of the exhaust gas processor 240 can perform preliminary filtration of the exhaust gas, which can not only effectively extend the service life of the fan 220 and the exhaust gas processor 240, but also effectively improve the dust removal and purification effect of the system.

[0046] Specifically, the exhaust gas processor 240 can be an exhaust gas filter or an exhaust gas recovery unit. For example, when the exhaust gas processor is set as a condenser, it is used to realize exhaust gas recovery; when the exhaust gas processor is set as an activated carbon filter, it is used to realize exhaust gas adsorption and filtration; when the exhaust gas processor is set as a catalytic combustion unit, it is used to realize the combustion and removal of exhaust gas. It should be noted that the substance produced by hydrogen combustion is water, which does not pollute the environment and is safe and environmentally friendly.

[0047] Understandably, the filter screen 311 is located at the connection between the wastewater pipe 310 and the drain pipe 140. By raising the position of the filter screen 311, wastewater falls through the filter screen 311 into the wastewater pipe 310. The filter screen 311 effectively isolates particulate matter from further contact with the wastewater, thereby effectively reducing the hydrogen gas produced by the reaction of magnesium with water, and further improving the overall safety of the system. Preferably, the connection between the filter screen 311 and the wastewater pipe 310 is a quick-release structure, which allows for easy removal of the filter screen 311 for cleaning and maintenance, thereby improving the overall performance of the wet dust removal system.

[0048] It is understood that the air inlet pipe 130 is inclined to the horizontal plane. Preferably, the central axis of the end of the air inlet pipe 130 that connects to the dust removal pipe 100 is inclined to the horizontal plane. The top end of the air inlet pipe 130 is connected to the dust removal pipe 100, and the bottom end of the air inlet pipe 130 is connected to the dust collection hood 131. The dust collection hood 131 is an upwardly narrowing guide hood structure, which can effectively improve the uniformity of gas collection.

[0049] The inclined air inlet pipe 130 can effectively increase the residence time of the airflow drawn into the environment in the dust collection pipe, thereby effectively improving the wet dust removal effect. Furthermore, the airflow entering the dust removal pipe 100 from the air inlet pipe 130 is inclined from bottom to top and can collide with the downward sprayed liquid, thereby effectively improving the dust removal effect.

[0050] It is understandable that the dust removal pipe 100 is a metal pipe, preferably a stainless steel pipe. The dust removal pipe 100 is connected to a grounding wire, which can effectively balance the charge of the dust removal pipe and avoid static electricity from causing safety problems.

[0051] It is understood that the dust removal duct 100 is equipped with an observation window, through which the internal condition of the dust removal duct 100 can be observed, which can effectively improve the convenience of supervision. The observation window can be set as double-layer glass with explosion-proof film sandwiched between layers.

[0052] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A wet dust removal system for magnesium-containing dust, characterized in that, include: A dust removal duct (100) extends horizontally. A water supply pipe (110) is provided at the top of the dust removal duct (100). The water supply pipe (110) is connected to several spray heads (120) whose outlets are all located inside the dust removal duct (100). Several air inlet pipes (130) are provided on opposite sides of the dust removal duct (100). A drain pipe (140) is provided at the bottom of the dust removal duct (100). The negative pressure assembly (200) includes an exhaust pipe (210) and a fan (220). The inlet of the exhaust pipe (210) is connected to one end of the dust removal pipe (100), and the outlet of the exhaust pipe (210) is connected to the exhaust side of the fan (220). The cross-sectional area of ​​the inlet of the exhaust pipe (210) is larger than the cross-sectional area of ​​the outlet of the exhaust pipe (210). The central axis of the inlet of the exhaust pipe (210) is located below the central axis of the outlet of the exhaust pipe (210). The circulation component (300) includes a wastewater pipe (310), a return pipe (320), a water storage tank (330), an alkali pipe (340), and a water supply pipe (350). The wastewater pipe (310) is connected to the drain pipe (140). One end of the wastewater pipe (310) is equipped with a return pump (321). The two ends of the return pipe (320) are respectively connected to the return pump (321) and the water storage tank (330). The wastewater pipe (310) is equipped with a filter screen (311) separating the drain pipe (140) and the return pump (321). The alkali pipe (340), the water supply pipe (350), and the water supply pipe (110) are all connected to the water storage tank (330).

2. The wet dust removal system for magnesium-containing dust according to claim 1, characterized in that, A stirring paddle (331) is rotatably connected to the water storage tank (330), and the stirring paddle (331) is connected to a motor (332) located outside the water storage tank (330).

3. The wet dust removal system for magnesium-containing dust according to claim 1, characterized in that, The end of the alkali pipe (340) away from the water storage tank (330) is connected to a weak alkali storage tank (341).

4. The wet dust removal system for magnesium-containing dust according to claim 1, characterized in that, The extraction pipe (210) is equipped with an ultraviolet light-emitting module (230), and the inner wall of the extraction pipe (210) is covered with a titanium dioxide layer (212).

5. A wet dust removal system for magnesium-containing dust according to claim 4, characterized in that, The exhaust pipe (210) is provided with an exhaust filter (211) located between the fan (220) and the dust removal pipe (100).

6. A wet dust removal system for magnesium-containing dust according to claim 5, characterized in that, The exhaust side of the fan (220) is connected to an exhaust gas processor (240).

7. A wet dust removal system for magnesium-containing dust according to claim 1, characterized in that, The filter screen (311) is located at the connection between the wastewater pipe (310) and the drain pipe (140).

8. A wet dust removal system for magnesium-containing dust according to claim 1, characterized in that, The air inlet pipe (130) is inclined to the horizontal plane. The top end of the air inlet pipe (130) is connected to the dust removal pipe (100), and the bottom end of the air inlet pipe (130) is connected to the dust collection hood (131).

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