Dust removal system

Abstract

The utility model relates to the technical field of dust removal of metal powder, in particular to a dust removal system which comprises an air inlet pipeline, an air blower, a filtering container, an atomizing nozzle, a precipitation container, an oil pump, an exhaust pipeline and an induced draft fan, the air inlet pipeline communicates with the filtering container, and the air blower is arranged on the air inlet pipeline; the filtering container forms an oil storage area and a gas area, and the atomizing nozzle is arranged in the gas area; the inlet end of the precipitation container is communicated with the oil storage area through a first middle pipeline, the outlet end of the precipitation container is communicated with the atomizing nozzle through a second middle pipeline, and the oil pump is arranged on the second middle pipeline; the exhaust pipeline is communicated with the gas area, and the induced draft fan is arranged on the exhaust pipeline; the atomizing nozzle is arranged between the air outlet and the oil storage area. Therefore, the novel oil-method dust removal device special for metal powder processing is provided, the problems of combustion or explosion and the like caused by the contact reaction of the metal powder and air or water are avoided, the safety and the reliability are improved, and the system is convenient to clean and maintain.

Description

Technical Field

[0001] The present application relates to the technical field of metal powder dust removal, and in particular to a dust removal system. Background Art

[0002] At present, ultrafine dust is inevitably generated during the production and processing of metal powders such as magnesium and aluminum. The chemical properties of these ultrafine metal powders are particularly active and they can easily react with oxygen in the air to cause combustion or explosion. Usually, bag dust collectors are used to collect powders during the processing of magnesium and aluminum powders. Although this method can collect dust during the production process, the bags of the dust collectors themselves are extremely difficult to clean, and explosion accidents are prone to occur during repair and maintenance. In addition, conventional wet dust collectors cannot be used for dust removal of micropowders processed from metals such as magnesium and aluminum, because metals such as magnesium and aluminum will react with water to produce flammable and explosive hydrogen. Utility Model Content

[0003] The purpose of this application is to provide a dust removal system, which to a certain extent solves the technical problem in the prior art of urgently needing to develop a dust removal device that can safely and effectively recycle metal powders such as magnesium and aluminum and is extremely easy to clean.

[0004] The present application provides a dust removal system, comprising: an air intake pipe, a blower, a filter container, an atomizing nozzle, a sedimentation container, an oil pump, an exhaust pipe, and an induced draft fan; wherein, an oil storage area and a gas area are formed in the filter container and are oppositely arranged; the atomizing nozzle is arranged in the gas area, and the oil atomized by the atomizing nozzle can fall into the oil storage area; the air intake pipe is connected to the inlet end of the oil storage area, and the blower is arranged in the air intake pipe;

[0005] The inlet end of the sedimentation container is connected to the outlet end of the oil storage area via a first intermediate pipeline, the outlet end of the sedimentation container is connected to the atomizing nozzle via a second intermediate pipeline, and the oil pump is arranged in the second intermediate pipeline; the exhaust pipeline is connected to the air outlet of the gas area, the induced draft fan is arranged in the exhaust pipeline, and the gas filtered through the oil storage area can convect with the oil atomized by the atomizing nozzle.

[0006] In the above technical solution, further, the dust removal system also includes an oil filter, and the oil filter is arranged in the exhaust pipe.

[0007] In any of the above technical solutions, further, the dust removal system also includes an oil drain pipeline, one end of the oil drain pipeline is connected to the oil filter, and the other end of the oil drain pipeline is connected to the filter container.

[0008] In any of the above technical solutions, further, the dust removal system also includes a first valve, and the first valve is arranged in the oil drain pipeline.

[0009] In any of the above technical solutions, further, the dust removal system also includes a first conveying pipeline, one end of the first conveying pipeline is connected to the first intermediate pipeline, and the other end of the first conveying pipeline extends to near the bottom of the precipitation container.

[0010] In any of the above technical solutions, further, the dust removal system also includes a second valve, and the second valve is arranged in the first conveying pipeline and exposed to the precipitation container.

[0011] In any of the above technical solutions, further, the first conveying pipeline extends along the height direction of the precipitation container.

[0012] In any of the above technical solutions, further, the dust removal system also includes a sewage discharge pipeline and a third valve; wherein, the sewage discharge pipeline is connected to the bottom of the precipitation container, and the third valve is arranged on the sewage discharge pipeline.

[0013] In any of the above technical solutions, further, the dust removal system also includes a second conveying pipeline, one end of the second conveying pipeline is connected to the precipitation container, and the other end of the second conveying pipeline is connected to the second intermediate pipeline.

[0014] In any of the above technical solutions, further, the dust removal system also includes a fourth valve, and the fourth valve is arranged in the second conveying pipeline.

[0015] In any of the above technical solutions, further, one end of the second conveying pipeline is connected to the upper middle part of the precipitation container.

[0016] In any of the above technical solutions, further, there are multiple precipitation containers, and the multiple precipitation containers are connected in parallel between the first intermediate pipeline and the second intermediate pipeline.

[0017] In any of the above technical solutions, further, a portion of the air intake pipeline located between the blower and the inlet end of the filter container is bent.

[0018] In any of the above technical solutions, further, along the vertical direction, the sedimentation container is arranged below the filtration container.

[0019] In any of the above technical solutions, further, the gas area and the oil storage area are arranged in sequence from top to bottom along the vertical direction;

[0020] The air outlet, the atomizing nozzle and the oil storage area are arranged in sequence from top to bottom along a vertical direction.

[0021] In any of the above technical solutions, further, any of the precipitation containers is formed with an exhaust hole.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] The present application provides an oil-based dust removal system specifically for metal powder processing. Gas containing metal dust passes through a blower and enters the oil pool in the oil storage area by bubbling for oil filtration. At the same time, the filtered gas is drawn out by an induced draft fan. During the drawing-out process, the gas convects with the oil atomized by the atomizing nozzle for re-filtration.

[0024] It can be seen that the present application provides a new type of oil-based dust removal device specifically for metal powder processing, which avoids the reaction of metal powder with air or water, and the subsequent combustion or explosion, thereby improving safety and reliability. Moreover, after at least two filtrations, the dust removal effect is greatly improved. In addition, this dust removal system does not involve structures such as cloth bags, which makes it easier to clean and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0026] Figure 1 A schematic diagram of the structure of the dust removal system provided in an embodiment of the present application.

[0027] Reference numerals:

[0028] 1-air inlet pipe, 2-blower, 3-filter container, 31-oil storage area, 32-gas area, 4-atomizing nozzle, 5-sedimentation container, 51-exhaust hole, 6-oil pump, 7-exhaust pipe, 8-induced draft fan, 9-first intermediate pipe, 10-second intermediate pipe, 11-oil filter, 12-oil drain pipe, 13-first valve, 14-first delivery pipe, 15-second valve, 16-sewage pipe, 17-third valve, 18-second delivery pipe, 19-fourth valve. DETAILED DESCRIPTION

[0029] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0030] The components of the embodiments of the present application generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the present application.

[0031] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0032] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0034] Refer to the following Figure 1 A dust removal system according to some embodiments of the present application is described.

[0035] See also Figure 1 As shown, an embodiment of the present application provides a dust removal system, comprising: an air intake pipe 1, a blower 2, a filter container 3, an atomizing nozzle 4, a sedimentation container 5, an oil pump 6, an exhaust pipe 7, and an induced draft fan 8; wherein the air intake pipe 1 is connected to the inlet end of the filter container 3, and the blower 2 is arranged in the air intake pipe 1; an oil storage area 31 and a gas area 32 arranged opposite to each other are formed in the filter container 3, the atomizing nozzle 4 is arranged in the gas area 32, and the oil atomized by the atomizing nozzle 4 can fall into the oil storage area 31;

[0036] The inlet end of the sedimentation container 5 is connected to the filter container 3 via the first intermediate pipeline 9, the outlet end of the sedimentation container 5 is connected to the atomizing nozzle 4 via the second intermediate pipeline 10, and the oil pump 6 is arranged in the second intermediate pipeline 10; the exhaust pipeline 7 is connected to the air outlet of the filter container 3, and the induced draft fan 8 is arranged in the exhaust pipeline 7; the atomizing nozzle 4 is arranged between the air outlet and the oil storage area 31.

[0037] According to the structure described above, the present application provides an oil-based dust removal system dedicated to metal powder processing. The gas containing metal dust passes through the blower 2 and enters the oil pool in the oil storage area 31 by bubbling for oil filtration. At the same time, the filtered gas is drawn out by the induced draft fan 8. During the drawing-out process, the gas convects with the oil atomized by the atomizing nozzle 4 for re-filtration.

[0038] It can be seen that the present application provides a new type of oil-based dust removal device specifically for metal powder processing, which avoids the reaction of metal powder with air or water, and the subsequent combustion or explosion, thereby improving safety and reliability. Moreover, after at least two filtrations, the dust removal effect is greatly improved. In addition, this dust removal system does not involve structures such as cloth bags, which makes it easier to clean and maintain.

[0039] Furthermore, preferably, since inert gases such as nitrogen are usually used for recycling in the production process of magnesium, aluminum and other powders, the clean gas filtered by this dust removal system, that is, the gas discharged from the exhaust pipe 7, can be re-introduced into the magnesium, aluminum and other powder production area for recycling, thereby reducing the consumption of inert gas in the stack. Of course, this is not limited to this, and the filtered gas can also be directly discharged into the atmosphere.

[0040] In this embodiment, preferably, Figure 1 As shown, the dust removal system further includes an oil filter 11 , and the oil filter 11 is arranged in the exhaust pipe 7 .

[0041] According to the structure described above, the gas containing metal dust passes through the blower 2 and enters the oil pool in the oil storage area 31 by bubbling for oil filtration. At the same time, the filtered gas is drawn out by the induced draft fan 8. During the drawing-out process, the gas convects with the oil atomized by the atomizing nozzle 4 and is filtered again. After leaving the oil pool in the oil storage area 31, the gas passes through the oil filter 11 and is filtered again before being discharged. It can be seen that the gas containing metal dust has been effectively filtered three times, making the filtered gas cleaner and improving the dust removal effect.

[0042] It should be noted that the oil filter 11 may not be provided, and the choice is made according to actual needs.

[0043] In this embodiment, preferably, Figure 1As shown, the dust removal system further includes an oil drain pipeline 12 , one end of the oil drain pipeline 12 is connected to the oil filter 11 , and the other end of the oil drain pipeline 12 is connected to the filter container 3 .

[0044] According to the structure described above, the oil filtered by the oil filter 11 can be discharged back into the filter container 3 through the oil drain pipe and can be reused, thus saving resources.

[0045] In this embodiment, preferably, Figure 1 As shown, the dust removal system further includes a first valve 13 , and the first valve 13 is disposed in the oil drain pipeline 12 .

[0046] According to the structure described above, it can be seen that the first valve 13 is used to control the connection or closing of the oil discharge pipeline 12, which has stronger controllability and can meet different usage requirements.

[0047] Furthermore, preferably, the first valve 13 may be a battery valve, and the system may be equipped with a controller. The battery valve is communicatively connected to the controller and can be automatically controlled to open or close, resulting in a higher degree of automation.

[0048] In this embodiment, preferably, Figure 1 As shown, the dust removal system further includes a first conveying pipeline 14 , one end of which is connected to the first intermediate pipeline 9 , and the other end of the first conveying pipeline 14 extends toward the bottom of the precipitation container 5 and is close to the bottom of the precipitation container 5 .

[0049] According to the structure described above, the first delivery pipeline 14 can extend and approach the bottom of the sedimentation container 5, can deliver the filtered oil to the sedimentation container 5, and start to fill the sedimentation container 5 from the bottom upward, which helps the oil to settle and avoids the problem of internal fluctuation of the oil and inability to settle when the oil is transported from a high place to a low place.

[0050] Furthermore, preferably, the first delivery pipeline 14 extends along the height direction of the sedimentation container 5, and preferably, the first delivery pipeline 14 enters the sedimentation container 5 through the top of the sedimentation container 5 and extends to near the bottom of the sedimentation container 5. Of course, the present invention is not limited to this, and the first delivery pipeline 14 may also extend outside the sedimentation container 5, etc., and the specific design is based on actual needs.

[0051] It should be noted that: of course, the present invention is not limited to the above structure, and the bottom end of the first conveying pipeline 14 may also not be arranged close to the bottom of the precipitation container 5, and the specific design is based on actual needs.

[0052] In this embodiment, preferably, Figure 1 As shown, the dust removal system further includes a second valve 15 , and the second valve 15 is disposed in the first conveying pipeline 14 and exposed to the precipitation container 5 .

[0053] According to the structure described above, it can be seen that using the second valve 15 to control the connection or closing of the delivery pipeline has stronger controllability and can meet different usage requirements.

[0054] Furthermore, preferably, the second valve 15 can be a battery valve, and this battery valve can be connected to the aforementioned controller for communication and can be automatically controlled to open or close, with a higher degree of automation.

[0055] In this embodiment, preferably, Figure 1 As shown, the dust removal system further includes a sewage discharge pipeline 16 and a third valve 17 ; wherein the sewage discharge pipeline 16 is connected to the bottom of the precipitation container 5 , and the third valve 17 is arranged on the sewage discharge pipeline 16 .

[0056] According to the structure described above, a sewage discharge pipe 16 is provided at the bottom of the sedimentation container 5, and by opening the third valve 17 on the sewage discharge pipe 16, impurities deposited in the sedimentation container 5 can be discharged regularly, or when the sedimentation container 5 is cleaned regularly, the sewage after cleaning can be discharged by opening the third valve 17 after cleaning.

[0057] Furthermore, preferably, the first delivery pipeline 14 extends along the height direction of the sedimentation container 5, and preferably, the first delivery pipeline 14 enters the sedimentation container 5 through the top of the sedimentation container 5 and extends to near the bottom of the sedimentation container 5. Of course, the present invention is not limited to this, and the first delivery pipeline 14 may also extend outside the sedimentation container 5, etc., and the specific design is based on actual needs.

[0058] Furthermore, preferably, the third valve 17 may be a battery valve, and this battery valve may be connected to the aforementioned controller for communication and may be automatically controlled to be opened or closed, thereby achieving a higher degree of automation.

[0059] In this embodiment, preferably, Figure 1 As shown, the dust removal system further includes a second conveying pipeline 18 , one end of the second conveying pipeline 18 is connected to the precipitation container 5 , and the other end of the second conveying pipeline 18 is connected to the second intermediate pipeline 10 .

[0060] According to the structure described above, the second delivery pipeline 18 delivers the oil after sedimentation in the sedimentation container 5 to the atomizing nozzle 4 again, so that the atomized oil and the gas filtered by the oil storage area 31 are circulated for re-filtration.

[0061] Furthermore, preferably, one end of the second delivery pipe 18 is connected to the middle and upper portion of the settling container 5. In other words, one end of the second delivery pipe 18 is connected to the middle or upper portion of the settling container 5. This allows the cleaner oil in the middle and upper portion after settling to be delivered to the atomizing nozzle 4 for reuse. Of course, this is not limited to this. One end of the second delivery pipe 18 can also be connected to the lower portion of the settling container 5, etc., depending on actual needs.

[0062] In this embodiment, preferably, Figure 1 As shown, the dust removal system further includes a fourth valve 19 , and the fourth valve 19 is disposed in the second conveying pipeline 18 .

[0063] According to the structure described above, the fourth valve 19 is used to control the connection or closing of the second delivery pipeline 18, which has stronger controllability and can meet different usage requirements.

[0064] Furthermore, preferably, the fourth valve 19 can be a battery valve, and this battery valve can be connected to the aforementioned controller for communication and can be automatically controlled to open or close, with a higher degree of automation.

[0065] In this embodiment, preferably, Figure 1 As shown, there are multiple sedimentation containers 5 , and the multiple sedimentation containers 5 are connected in parallel between the first intermediate pipeline 9 and the second intermediate pipeline 10 .

[0066] According to the structure described above, multiple sedimentation containers 5 are designed in this application and are arranged in parallel between the first intermediate pipeline 9 and the second intermediate pipeline 10. Multiple sedimentation containers 5 can store oil at the same time to improve the liquid storage capacity.

[0067] It should be noted that: when there are multiple sedimentation containers 5, each sedimentation container 5 can be equipped with the aforementioned first delivery pipeline 14, second valve 15, second delivery pipeline 18, fourth valve 19, sewage pipeline 16 and third valve 17 and other structures. Of course, it is not limited to this.

[0068] In addition, the number of the precipitation containers 5 is not limited to multiple, and can also be one, etc., which is selected according to actual needs.

[0069] In this embodiment, preferably, Figure 1 As shown, the sedimentation container 5 is vertically positioned below the filter container 3. This utilizes the height difference and gravity to automatically flow the oil from the filter container 3 into the sedimentation container 5 below, eliminating the need for a pump and saving costs and energy. Of course, the positional relationship between the sedimentation container 5 and the filter container 3 is not limited to this and can be adjusted based on actual needs. For example, the sedimentation container 5 can be located on the same horizontal plane as the filter container 3, and a pump can be provided to facilitate the flow of the oil.

[0070] In this embodiment, preferably, Figure 1 As shown, each precipitation container 5 is formed with an exhaust hole 51 .

[0071] According to the structure described above, the inside and outside of the sedimentation container 5 are connected through the exhaust hole 51, thereby ensuring air pressure balance and improving safety and reliability.

[0072] Furthermore, preferably, the exhaust hole 51 is provided at the top of the precipitation container 5 . Of course, the exhaust hole 51 is not limited thereto and may also be provided at the side of the precipitation container 5 .

[0073] Furthermore, preferably, the storage and filtration container 3 and the sedimentation container 5 are both hollow tanks that can store oil, but of course, the present invention is not limited thereto.

[0074] In this embodiment, preferably, Figure 1 As shown, a portion of the air intake pipe 1 between the blower 2 and the inlet end of the filter container 3 is bent.

[0075] According to the structure described above, the air intake pipe 1 in front of the inlet end of the filter container 3 is designed to be bent, which appropriately slows down the speed of the gas so that the gas can fully contact the oil and improve the filtering effect.

[0076] Furthermore, preferably, the portion of the air intake pipeline 1 between the blower 2 and the inlet end of the filter container 3 is U-shaped, or wavy, etc.

[0077] Of course, the present invention is not limited thereto. The air intake pipe 1 in front of the inlet end of the filter container 3 may also be designed into other shapes or a straight pipe according to actual needs. Preferably, the air intake pipe 1 adopts a rounded structure at the bend.

[0078] In this embodiment, preferably, Figure 1 As shown, the gas area 32 and the oil storage area 31 are arranged in sequence from top to bottom along the vertical direction;

[0079] The air outlet, the atomizing nozzle 4 and the oil storage area 31 are arranged in sequence along the vertical direction and from top to bottom.

[0080] According to the structure described above, it can be seen that after being designed in the above-mentioned orientation, under normal use, combined with the principle of gravity, the automatic rise of the gas after the oil in the oil storage area 31 is realized after the oil is filtered, and the atomized oil sprayed by the atomizing nozzle 4 above can convect with the rising gas, and the gas after re-filtration enters the oil filter 11 through the air outlet at the top for re-filtration and is finally discharged.

[0081] Further, preferably, the air outlet is arranged at the top of the filter container 3. Of course, it is not limited thereto, and the air outlet can also be arranged at the side of the filter container 3, etc.

[0082] It should be noted that the above-mentioned orientations may not be used and may be selected according to actual needs.

[0083] In this embodiment, preferably, Figure 1 As shown, the atomizing nozzle 4 can be fixed on the filter container 3, preferably, can be fixed on the filter container 3 by a bracket or the like.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A dust removal system, characterized in that: include: An air intake pipe, a blower, a filter container, an atomizing nozzle, a sedimentation container, an oil pump, an exhaust pipe, and an induced draft fan; wherein, an oil storage area and a gas area are formed in the filter container and are oppositely arranged, the atomizing nozzle is arranged in the gas area, and the oil atomized by the atomizing nozzle can fall into the oil storage area; the air intake pipe is connected to the inlet end of the oil storage area, and the blower is arranged in the air intake pipe; The inlet end of the sedimentation container is connected to the outlet end of the oil storage area via a first intermediate pipeline, the outlet end of the sedimentation container is connected to the atomizing nozzle via a second intermediate pipeline, and the oil pump is arranged in the second intermediate pipeline; the exhaust pipeline is connected to the air outlet of the gas area, the induced draft fan is arranged in the exhaust pipeline, and the gas filtered through the oil storage area can convect with the oil atomized by the atomizing nozzle.

2. The dust removal system according to claim 1, characterized in that: The dust removal system further includes an oil filter, and the oil filter is arranged in the exhaust pipe.

3. The dust removal system according to claim 2, characterized in that: The dust removal system further includes an oil drain pipeline, one end of which is connected to the oil filter, and the other end of which is connected to the filter container.

4. The dust removal system according to claim 3, characterized in that: The dust removal system further includes a first valve, and the first valve is arranged on the oil drain pipeline.

5. The dust removal system according to claim 1, characterized in that: The dust removal system further includes a first conveying pipeline, one end of which is connected to the first intermediate pipeline, and the other end of which extends to near the bottom of the precipitation container.

6. The dust removal system according to claim 5, characterized in that: The dust removal system further includes a second valve, and the second valve is arranged in the first conveying pipeline and exposed to the precipitation container; and / or The first conveying pipeline extends along the height direction of the precipitation container.

7. The dust removal system according to claim 1, characterized in that: The dust removal system further includes a sewage discharge pipeline and a third valve; wherein the sewage discharge pipeline is connected to the bottom of the precipitation container, and the third valve is arranged on the sewage discharge pipeline.

8. The dust removal system according to claim 1, characterized in that: The dust removal system further includes a second conveying pipeline, one end of the second conveying pipeline is connected to the precipitation container, and the other end of the second conveying pipeline is connected to the second intermediate pipeline.

9. The dust removal system according to claim 8, characterized in that: The dust removal system further includes a fourth valve, and the fourth valve is arranged on the second conveying pipeline; and / or One end of the second delivery pipeline is communicated with the upper middle portion of the precipitation container.

10. The dust removal system according to any one of claims 1 to 9, characterized in that: There are multiple precipitation containers, and the multiple precipitation containers are connected in parallel between the first intermediate pipeline and the second intermediate pipeline; and / or The portion of the air inlet pipeline between the blower and the inlet end of the filter container is bent; and / or In the vertical direction, the sedimentation container is arranged below the filtration container; and / or The gas area and the oil storage area are arranged in sequence from top to bottom along the vertical direction; The air outlet, the atomizing nozzle and the oil storage area are arranged in sequence from top to bottom along the vertical direction; and / or Any of the precipitation containers is formed with an exhaust hole.

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