Airborne fibre absorption device

Abstract

This invention discloses an air fiber absorption device, belonging to the field of air filtration technology. It includes a tank, a tank cover, an air inlet pipe, and a water pump. The tank contains a bath liquid; the tank cover is placed on top of the tank, and a cylinder is located in the middle of the tank cover; the air inlet pipe is inserted into the tank through the cylinder; the water inlet pipe of the water pump is connected to the bath liquid in the tank, and the water outlet pipe of the water pump delivers the bath liquid into the tank from the top of the cylinder; a vertical multi-stage bath tank is arranged between the tank cover and the air inlet pipe. This invention first allows air to impact the liquid surface inside the tank, and then guides the air to flow over a multi-stage flowing water film in the vertical multi-stage bath tank. Through multi-stage adsorption, more thorough fiber filtration can be achieved, making it suitable for air purification in factories where the air contains fiber dust.

Description

Technical Field

[0001] This invention relates to the field of air filtration technology, and more specifically to an air fiber absorption device. Background Technology

[0002] In the decorative building materials industry, the production process generates a certain amount of fiber dust. This fiber dust disperses within the factory, polluting the environment, and long-term inhalation of fiber dust can harm workers' health. Therefore, timely and efficient purification of fiber dust in the air is an important requirement in the field of industrial environmental protection.

[0003] Currently, most devices for treating airborne fiber dust employ water washing filtration, where fibers are captured by the liquid through air-liquid contact. Traditional water washing devices typically consist of a tank and an air inlet pipe. The air inlet pipe directly introduces fiber-containing air into the bath liquid inside the tank, either below or above the liquid surface. Initial washing is achieved by the water splashes or bubbles generated when the air impacts the liquid surface. However, these devices have limited air-liquid contact area, relying solely on direct impact of the air inlet pipe onto the liquid surface or a simple bubble rising process for purification. The contact between the fiber and the liquid occurs only near the liquid surface or on the bubble surface, resulting in poor capture efficiency for fine fibers. Summary of the Invention

[0004] In view of the above-mentioned technical deficiencies, the purpose of this invention is to provide an air fiber absorption device that extends the gas-liquid contact path and improves the capture effect of dust fibers by designing a vertical multi-stage bath.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present invention provides an air fiber absorption device, comprising:

[0006] A tank containing bath liquid, with an open top;

[0007] A can lid, which covers the top of the can body, and a cylinder is provided in the middle of the can lid;

[0008] An air inlet pipe is inserted into the tank from the cylinder, and the air outlet of the air inlet pipe is located above the liquid surface.

[0009] A water pump, wherein the inlet pipe of the water pump is connected to the bath liquid inside the tank, and the outlet pipe of the water pump delivers the bath liquid into the tank from the top of the cylinder;

[0010] A vertical multi-stage bath is provided between the tank cover and the air inlet pipe. The vertical multi-stage bath includes a flow-limiting shell in the shape of a frustum, and multiple annular first steps are provided on the circumferential surface of the flow-limiting shell.

[0011] The bath liquid delivered to the tank by the outlet pipe falls on the top of the flow-limiting shell and flows down the multi-layer first step, forming a flowing water film on the surface of the first step; the air input by the air inlet pipe enters the space between the flow-limiting shell and the liquid surface and between the flow-limiting shell and the tank cover, and is discharged from the top of the cylinder after being adsorbed by the multi-stage water film.

[0012] Preferably, the can lid has a variable diameter structure, and the can lid is provided with multiple second steps that cooperate with the first step; when air passes between the can lid and the vertical multi-stage bath, it repeatedly changes direction under the guidance of the multi-stage steps and impacts the water film.

[0013] Preferably, an annular settling tank is provided on the first step, and when the bath liquid fills the settling tank, it flows to the next first step.

[0014] Preferably, the settling tank has an annular channel, through which the bath liquid in the settling tank flows downward to the flow-limiting shell. The flow rate of the bath liquid flowing to the first step of the next level is greater than the flow rate flowing from the channel to the flow-limiting shell.

[0015] Preferably, a flow guide shell is fitted onto the air inlet pipe located below the flow restrictor shell, and the flow guide shell is provided with multiple third steps that cooperate with the first step, with the lowest third step inserted below the liquid surface.

[0016] Preferably, the bath liquid in the settling tank forms a waterfall as it falls from the through channel and lands on the third step below. The side wall of the third step is provided with an air outlet, which is located between two adjacent waterfall rings.

[0017] Preferably, the platform of the third step is inclined downward on the side close to the previous third step, so that the bath liquid falls on the third step and flows from the air outlet of the previous third step to the bottom of the guide shell.

[0018] Preferably, the air outlet of the air inlet pipe is provided with a rotating air outlet mechanism for cyclically changing the direction of air outlet.

[0019] Preferably, the rotating air outlet mechanism includes a rotating cover, which is rotatably mounted on the air outlet via a bearing, and the rotating cover is provided with a plurality of guide pipes.

[0020] Preferably, the exhaust direction of the exhaust port of the guide pipe is at an angle to the liquid surface.

[0021] The beneficial effects of this invention are as follows:

[0022] This invention features a tank cover at the top of the tank and a vertical multi-stage bath inside the cover. A water pump draws the bath liquid from the tank to the top of the cover and flows down from the top of the vertical multi-stage bath. A multi-stage flowing water film is formed on the multi-layered annular first step of the frustum-shaped flow-limiting shell, significantly increasing the gas-liquid contact area. Air entering from the inlet pipe first impacts the liquid surface inside the tank, and then flows upward through the gap between the flow-limiting shell and the tank cover. The air must pass through the water film layer by layer. Dust and fibers in the air are adhered and trapped by the water film. Compared with traditional single-water washing devices that only allow the inlet pipe to directly impact the liquid surface inside the tank before expelling the air, this invention first allows the air to impact the liquid surface, and then guides the air to flow over the multi-stage flowing water film. Multi-stage adsorption can achieve more thorough fiber filtration, making it suitable for air purification in factories where the air contains fiber dust.

[0023] The can lid of the present invention is provided with multiple second steps. The second steps and the first steps form an interlaced airflow channel, which forces the air to repeatedly change direction and impact the water film during the flow. While extending the airflow path, the turbulence effect enhances gas-liquid mixing, making the fibers easier to be captured by the water film and improving the overall purification efficiency.

[0024] The first step of this invention features a settling tank that temporarily stores the bath liquid, ensuring a stable and continuous water film on the surface of each first step and preventing the film from breaking due to excessive flow velocity. A through-flow channel in the settling tank allows some bath liquid to flow downwards, forming a waterfall. Flow control (the flow rate to the next level is greater than the through-flow channel flow rate) ensures that each first step maintains sufficient liquid volume. Fibers adsorbed on the water film surface fall with the water flow to the bath liquid surface inside the tank, ensuring water film thickness while avoiding the risk of secondary contamination caused by bath liquid stagnation. Multiple waterfall flows are formed below the multiple first steps, impacting multiple third steps of the guide shell. The air outlet of the third step is located between two adjacent waterfall flows, allowing air to undergo gas-liquid impact and bubble bursting as it passes through the water flow, further capturing fine fibers. Simultaneously, the inclined design of the third step platform guides the bath liquid into the area below the guide shell, again forming multiple waterfall flows. These flows impact the rebound airflow generated by the air outlet of the air inlet spraying onto the liquid surface, performing a water washing process and improving the filtration and separation of fibers from the air. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a perspective view of the overall structure of an air fiber absorption device provided in an embodiment of the present invention.

[0027] Figure 2 This is a top view of the overall structure of an air fiber absorption device provided in an embodiment of the present invention.

[0028] Figure 3 for Figure 2 Sectional view at point AA.

[0029] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle.

[0030] Figure 5 for Figure 3 A magnified view of a section at point B.

[0031] Figure 6 This is a perspective view of the air guide shell and air inlet pipe in an air fiber absorption device provided in an embodiment of the present invention, viewed from below.

[0032] Figure 7 This is a perspective view of a vertical multi-stage bath in an air fiber absorption device provided in an embodiment of the present invention.

[0033] Figure 8 This is a top-view perspective view of the airflow guide shell in an air fiber absorption device provided in an embodiment of the present invention.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Tank body, 2. Tank cover, 3. Cylinder, 4. Air inlet pipe, 5. Water pump, 6. Water inlet pipe, 7. Water outlet pipe, 8. Vertical multi-stage bath, 9. Flow restrictor shell, 10. First step, 11. Second step, 12. Settling tank, 13. Through channel, 14. Flow guide shell, 15. Third step, 16. Air outlet, 17. Rotary cover, 18. Bearing, 19. Flow guide pipe, 20. Exhaust port. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Example 1:

[0038] like Figures 1 to 8As shown, Embodiment 1 of the present invention provides an air fiber absorption device for filtering dust and fibers in the air of a factory. It mainly includes a tank 1, a tank cover 2, an air inlet pipe 4, a water pump 5, and a vertical multi-stage bath 8. The tank 1 is cylindrical and contains a bath liquid for adsorbing pollutants such as fibers and dust. The bath liquid is water or other suitable liquid, and the top of the tank 1 is open. The tank cover 2 is detachably installed on the top of the tank 1, sealing the top of the tank 1. A cylinder 3 is located above the middle of the tank cover 2, and the axis of the cylinder 3 coincides with the axis of the tank 1. The air inlet pipe 4 is inserted into the tank 1 from the top of the cylinder 3, and the outlet of the air inlet pipe 4 is located above the surface of the bath liquid in the tank 1. The other end of the air inlet pipe 4 can be connected to a fan, which draws air from the factory into the air inlet pipe 4, so that the air to be treated is transported to the tank 1 through the air inlet pipe 4.

[0039] like Figure 3 and Figure 5 As shown, a vertical multi-stage bath tank 8 is positioned between the tank cover 2 and the air inlet pipe 4. It includes a frustum-shaped flow-limiting shell 9, the top of which is fixed to the air inlet pipe 4, with the axis of the air inlet pipe 4 coinciding with the axis of the flow-limiting shell 9. The circumferential surface of the flow-limiting shell 9 has multiple ring-shaped first steps 10 arranged from top to bottom, with the outer diameter of each first step 10 gradually increasing from top to bottom, forming a progressively expanding stepped structure. A drain pipe is installed on the side wall of the tank body 1, and the inlet pipe 6 of the water pump 5 is connected to the drain pipe, allowing the water pump 5 to draw bath liquid from the tank body 1 through both the drain pipe and the inlet pipe 6. The outlet pipe 7 of the water pump 5 is inserted into the cylinder 3 from the top. A water inlet cover is fitted onto the portion of the air inlet pipe 4 located inside the cylinder 3, with the bottom outlet of the water inlet cover near the top of the flow-limiting shell 9. The water pump 5 can discharge the drawn bath liquid into the water inlet cover, and the bath liquid flows evenly from the top of the flow-limiting shell 9 to the surrounding area. The bath liquid flows from top to bottom along the multi-layered first step 10, forming a continuously flowing water film on the surface of each first step 10. The fibers adsorbed on the surface of the water film fall with the water flow onto the surface of the bath liquid inside the tank, avoiding the risk of secondary pollution caused by bath liquid stagnation.

[0040] The can lid 2 also adopts a variable diameter structure, with the inner diameter of the can lid 2 gradually increasing from top to bottom, and its inner wall is provided with multiple layers of second steps 11 that cooperate with the multiple layers of first steps 10. For example... Figure 5 As shown, the bottom corner of the second step 11 corresponds to the corner of the first step 10. The outer diameter of the second step 11 is larger than the inner diameter of the corresponding first step 10, which forms a tortuous airflow channel between the can lid 2 and the flow-limiting shell 9.

[0041] After the air to be treated is discharged from the outlet of the air inlet pipe 4, it will first impact the surface of the bath liquid in the tank 1. Some of the larger fiber particles are captured by the liquid surface. Then, the air containing finer fiber particles enters the area between the flow limiting shell 9 and the tank cover 2 through the gap between the flow limiting shell 9 and the liquid surface. During the flow, the air needs to pass through the water film on the surface of the first step 10 layer by layer under the guidance of the first step 10 and the second step 11. The air flow path is extended, and turbulence effect is generated during repeated changes of direction, which enhances the gas-liquid mixing and makes it easier for fine dust and fibers in the air to be captured and trapped by the water film. After adsorption by multiple stages of water film, the clean air is discharged from the top of the cylinder 3.

[0042] Through the above structure, the technical solution of the present invention significantly increases the gas-liquid contact area within the same volume. Compared with the traditional single bath water washing device, this embodiment achieves multi-stage adsorption of fibers in the air, resulting in a better purification effect.

[0043] Example 2:

[0044] Based on Embodiment 1, this invention further provides an annular settling trough 12 on each first step 10. When the bath liquid flows from the upper first step 10 to the current first step 10, it first fills the settling trough 12. After the settling trough 12 is full of bath liquid, the bath liquid flows over the outer edge of the settling trough 12 to the next lower first step 10, making the water film in the settling trough 12 thicker and more stable. This invention also provides an annular through-channel 13 in the settling trough 12, which extends vertically through the flow-limiting shell 9. This allows some of the bath liquid in the settling trough 12 to flow downwards through the settling trough 12, thereby forming multiple annular waterfall flows centered on the axis of the air inlet pipe 4 below the flow-limiting shell 9.

[0045] By rationally designing the size and number of through channels 13 and the conveying efficiency of the water pump 5, the flow rate of the bath liquid flowing to the next level first step 10 can be greater than the flow rate flowing from the through channels 13 to the bottom of the flow-limiting shell 9. This ensures that there is always sufficient bath liquid on each level first step 10 that can flow downward through the through channels 13 and along the edge of the settling tank 12 to the next level first step 10. This ensures that the surface of each level first step 10 always maintains a sufficient liquid volume, forming a stable and continuous water film and preventing the water film from breaking due to excessive flow rate or insufficient flow.

[0046] With the above setup, when air is discharged from the outlet of the air inlet pipe 4 and impacts the liquid surface, the air passes through multiple concentric waterfall flows before entering the space between the tank lid 2 and the vertical multi-stage bath 8. The waterfall flows create a fine mist on the liquid surface. As the air passes through the multiple concentric waterfall flows and water mist, some of the fine dust and fibers are trapped. This makes the air more thoroughly and completely purified after passing between the tank lid 2 and the vertical multi-stage bath 8, resulting in a better purification effect.

[0047] Example 3:

[0048] Based on Embodiments 1 and 2, the present invention further adds a flow guide shell 14 below the flow restrictor shell 9. The flow guide shell 14 is fixedly sleeved on the air intake pipe 4, and the flow guide shell 14 is also frustoconical, with its axis coinciding with the axis of the air intake pipe 4. The flow guide shell 14 is provided with multiple third steps 15 that cooperate with the first step 10. The inner diameter of each third step 15 gradually increases from top to bottom, and the lowest third step 15 is inserted below the surface of the bath liquid.

[0049] like Figure 5 As shown, unlike the first step 10, the upper surface of the third step 15 is inclined. The inner height of the annular third step 15 is lower than the outer height, and an air outlet 16 is provided on the inner wall of the third step 15. This allows the bath liquid falling from the upper channel 13 to enter the air outlet 16 along the surface of the third step 15 and continue to flow downward, forming multiple waterfall flows below the guide shell 14.

[0050] Therefore, in this embodiment, there is a waterfall flow between the flow-limiting shell 9 and the flow-guiding shell 14, and also between the flow-guiding shell 14 and the liquid surface below. The vent 16 is located between two adjacent waterfall flows. When the air ejected from the vent impacts the liquid surface, the air disperses below the flow-guiding shell 14. At this time, the air passes through the waterfall flow below the flow-guiding shell 14, and some of the dust fibers are captured. Since the lowest edge of the flow-guiding shell 14 is below the liquid surface, the air can only pass through the vent 16 and enter the space between the flow-guiding shell 14 and the flow-limiting shell 9. After passing through the water film on the inclined platform of the third step 15, the air collides with the waterfall flow between the flow-limiting shell 9 and the flow-guiding shell 14, and some of the remaining dust fibers are captured. When the air enters the space between the flow-limiting shell 9 and the can lid 2, the remaining dust fibers are adsorbed by the water film on the multi-stage first step 10. Finally, the air purified by the three-dimensional multi-stage water bath filtration is discharged from the top of the cylinder 3, completing the air purification.

[0051] Example 4:

[0052] Based on Embodiments 1 to 3, the present invention also provides a rotating air outlet mechanism at the air outlet of the air inlet pipe 4. The function of the rotating air outlet mechanism is to tilt the air outlet to release air and continuously change the direction and position of the air release, causing the liquid surface to fluctuate, thereby blowing away the dust fibers adsorbed on the surface of the liquid and maintaining a good dust capture ability on the liquid surface near the air outlet.

[0053] like Figure 6As shown, the rotating air outlet mechanism includes a rotating cover 17 mounted on the air outlet of the air inlet pipe 4 via a bearing 18. The rotating cover 17 can rotate on the air inlet pipe 4. Sealed dust covers are provided on both sides of the bearing 18 to protect the internal rollers. Three guide pipes 19 are provided on the circumferential side of the rotating cover 17, and the exhaust direction of the exhaust port 20 of each guide pipe 19 is at a 60-degree angle to the liquid surface. The air ejected from the outlet is discharged through the exhaust port 20 of the guide pipe 19. The reaction force when the air contacts the liquid surface drives the rotating cover 17 and the guide pipes 19 to rotate cyclically around the axis of the air inlet pipe 4, thereby continuously changing the direction of the air outlet, so that the air impacts the liquid surface from different directions, making the dispersed air more uniform, further increasing the uniformity and fullness of gas-liquid contact, and improving the effect of filtering and separating fibers from the air.

[0054] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. An air fiber absorption device, characterized in that, include: A tank containing bath liquid, with an open top; A can lid, which covers the top of the can body, and a cylinder is provided in the middle of the can lid; An air inlet pipe is inserted into the tank from the cylinder, and the air outlet of the air inlet pipe is located above the liquid surface. A water pump, wherein the inlet pipe of the water pump is connected to the bath liquid inside the tank, and the outlet pipe of the water pump delivers the bath liquid into the tank from the top of the cylinder; A vertical multi-stage bath is provided between the tank cover and the air inlet pipe. The vertical multi-stage bath includes a flow-limiting shell in the shape of a frustum, and multiple annular first steps are provided on the circumferential surface of the flow-limiting shell. The bath liquid delivered to the tank by the outlet pipe falls on the top of the flow-limiting shell and flows down the multi-layer first step, forming a flowing water film on the surface of the first step; the air input by the air inlet pipe enters the space between the flow-limiting shell and the liquid surface and between the flow-limiting shell and the tank cover, and is discharged from the top of the cylinder after being adsorbed by the multi-stage water film.

2. The air fiber absorption device as described in claim 1, characterized in that, The can lid has a variable diameter structure, and the can lid is provided with multiple second steps that cooperate with the first step; when air passes between the can lid and the vertical multi-stage bath, it repeatedly changes direction under the guidance of the multi-stage steps and impacts the water film.

3. The air fiber absorption device as described in claim 2, characterized in that, An annular settling tank is provided on the first step. When the bath liquid fills the settling tank, it flows to the next first step.

4. The air fiber absorption device as described in claim 3, characterized in that, The settling tank has an annular channel, through which the bath liquid in the settling tank flows downward to the flow-limiting shell. The flow rate of the bath liquid flowing to the first step of the next level is greater than the flow rate flowing from the channel to the flow-limiting shell.

5. The air fiber absorption device as described in claim 4, characterized in that, A flow guide shell is fitted onto the air inlet pipe located below the flow restrictor shell. The flow guide shell is provided with multiple third steps that cooperate with the first step, and the lowest third step is inserted below the liquid surface.

6. The air fiber absorption device as described in claim 5, characterized in that, When the bath liquid in the settling tank falls from the through channel, it forms a waterfall and falls onto the third step below. The side wall of the third step is provided with an air outlet, which is located between two adjacent waterfalls.

7. The air fiber absorption device as described in claim 6, characterized in that, The platform of the third step slopes downwards on the side closest to the third step above, and the bath liquid falls onto the third step and flows from the vent of the third step above to the bottom of the guide shell.

8. The air fiber absorption device as described in claim 1, characterized in that, The air outlet of the air inlet is equipped with a rotating air outlet mechanism, which is used to cyclically change the direction of the air outlet.

9. The air fiber absorption device as described in claim 8, characterized in that, The rotating air outlet mechanism includes a rotating cover, which is rotatably mounted on the air outlet via a bearing, and the rotating cover is provided with multiple guide pipes.

10. An air fiber absorption device as described in claim 9, characterized in that, The exhaust direction of the exhaust port of the guide pipe is at an angle to the liquid surface.

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