A wet dust removal device

Abstract

This utility model belongs to the field of dust removal technology and discloses a wet dust removal device, including a shell, a dust removal device, and a filter device. The shell has a dust removal chamber and a filter water tank disposed below the dust removal chamber. The dust removal device is disposed in the dust removal chamber and includes a throttling plate and a water curtain assembly. The water curtain assembly is disposed above the throttling plate and is used to generate a water curtain on the air inlet side of the throttling plate. The filter device is disposed in the filter water tank and includes a filter frame and a filter plate. The filter frame has an opening at the upper end and a plurality of first filter holes are evenly distributed on its surface. The filter plate has a plurality of second filter holes evenly distributed on its surface. The filter plate is inclined from top to bottom. The upper end of the filter plate is located below the water curtain and is used to collect dust removal wastewater. The lower end of the filter plate extends to the upper opening of the filter frame.

Description

Technical Field

[0001] This utility model relates to the field of dust removal technology, and in particular to a wet dust removal device. Background Technology

[0002] In industrial sectors such as tobacco processing, the operation of tobacco stem drying machines generates high-temperature, high-humidity, dust-laden exhaust gas. This exhaust gas contains a large amount of dust and requires purification treatment using a wet scrubber to control the dust concentration in the discharged exhaust gas within the standard range of ≤20mg / m³ to achieve compliant emissions. However, existing wet scrubbers are prone to causing sewer blockages during actual use. The filter frames in the existing equipment's filter tank use a φ5mm mesh design, while the dust particles entering the dust removal system are small in size. A large amount of dust will pass through the mesh with the overflow water and enter the sewer, causing blockages after long-term accumulation. If the filter frames are replaced with φ1mm mesh to improve the filtration effect, the mesh size is too small, and the surface tension of the water will cause poor drainage of the filter frames. When the water volume is too large, the dust removal wastewater will overflow from the frame opening, completely losing the filtration function.

[0003] Therefore, there is an urgent need to develop a wet dust removal device to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to solve or at least alleviate some or all of the aforementioned problems. Therefore, the purpose of this invention is to provide a wet dust removal device that, while ensuring the efficiency of dust removal wastewater discharge, reduces the dust content in the wastewater and prevents dust from accumulating and clogging the sewer system.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A wet dust collection device, comprising:

[0007] The housing has a dust removal chamber inside and a filter water tank located below the dust removal chamber;

[0008] A dust removal device is installed inside the dust removal chamber and includes a throttling plate and a water curtain assembly. The water curtain assembly is installed above the throttling plate and is used to generate a water curtain on the air inlet side of the throttling plate.

[0009] A filtration device, disposed within the filtration tank, includes a filter frame and a filter plate. The filter frame has an opening at its upper end and a plurality of first filter holes evenly distributed on its surface. The filter plate has a plurality of second filter holes evenly distributed on its surface. The filter plate is inclined from top to bottom, with its upper end located below the water curtain for receiving dust removal wastewater. The lower end of the filter plate extends to the upper opening of the filter frame. The area of ​​the first filter holes is smaller than the area of ​​the second filter holes.

[0010] In some alternative embodiments, the pore size of the first filter hole is 1.4~1.6 mm.

[0011] In some optional embodiments, the second filter hole is an oblong hole, and the long axis of the oblong hole is aligned with the tilt direction of the filter plate.

[0012] In some optional embodiments, the major axis of the waist-shaped hole is 9.5~10.5mm, and the minor axis diameter is 1.5~2.5mm.

[0013] In some alternative embodiments, the filter plate is at an angle of 20° to 60° to the horizontal direction.

[0014] In some optional embodiments, the dust removal device further includes a water circuit assembly and a spray assembly. The spray assembly includes a spray pipe and multiple spray heads. The spray pipe is horizontally arranged on the air inlet side of the water curtain. Multiple spray heads are evenly arranged along the length of the spray pipe. The input end of the water circuit assembly is connected to a water source, and the output end of the water circuit assembly is connected to the water curtain assembly and the water inlet end of the spray pipe, respectively.

[0015] In some optional embodiments, the water circuit assembly further includes a circulating water pump and a circulating pipe; the input end of the circulating pipe is connected to the outlet of the filter water tank, the circulating water pump is disposed between the two, and the output end of the circulating pipe is connected to the inlet of the water curtain assembly and the spray pipe, respectively.

[0016] In some optional embodiments, the water circuit assembly further includes an inlet angle valve and a check valve, with the check valve and the inlet angle valve sequentially arranged between the input and output ends of the circulation pipe.

[0017] In some optional embodiments, the output end of the circulation pipe is connected in parallel to a spray interface pipe and a water curtain interface pipe. The spray interface pipe is connected to the water inlet end of the spray pipe, and the water curtain interface pipe is connected to the water inlet end of the water curtain assembly. A spray angle valve is provided on the spray interface pipe.

[0018] In some alternative embodiments, the water curtain assembly includes an overflow channel, and the water channel assembly generates the water curtain on the air inlet side of the throttling plate by continuously supplying water into the overflow channel.

[0019] The beneficial effects of this utility model are:

[0020] This utility model provides a wet dust removal device, including a shell, a dust removal device, and a filter device. The shell has a dust removal chamber and a filter water tank disposed below the dust removal chamber. The dust removal device is disposed in the dust removal chamber and includes a throttling plate and a water curtain assembly. The water curtain assembly is disposed above the throttling plate and is used to generate a water curtain on the air inlet side of the throttling plate. Dust-laden gas passes through the water curtain, and the dust particles therein are captured by the water curtain.

[0021] The filtration device, located within a filtration tank, includes a filter frame and a filter plate. The filter frame has an opening at its top and multiple first filter holes evenly distributed on its surface. The filter plate has multiple second filter holes evenly distributed on its surface. The filter plate is inclined downwards, with its upper end positioned below the water curtain to collect the dust removal wastewater. The lower end of the filter plate extends to the opening at the top of the filter frame. The filter plate acts as a flow guide, directing the dust removal wastewater sequentially through the filter plate into the filter frame. A portion of the wastewater passes through the second filter holes and falls into the filtration tank for discharge, while the remaining wastewater flows across the surface of the filter plate and into the filter frame, ultimately passing through the first filter holes and being discharged. The first filter hole has a smaller area than the second filter hole. A portion of the dust removal wastewater undergoes primary filtration through the second filter hole, while the remaining wastewater undergoes secondary filtration through the smaller first filter hole. This effectively reduces the dust content in the wastewater. The filter plate serves to filter and divert the wastewater, effectively preventing excessive water volume from causing drainage problems in the filter frame and avoiding overflow of wastewater from the top opening of the filter frame. Thus, while ensuring the efficiency of wastewater discharge, the dust content in the wastewater is reduced, preventing dust from accumulating and clogging the sewer. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of the wet dust removal equipment described in this embodiment of the utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the filtration device described in an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of the filter plate described in an embodiment of the present utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the waterway component described in an embodiment of this utility model.

[0027] In the picture:

[0028] 1. Shell; 11. Dust removal chamber; 12. Filter water tank;

[0029] 2. Dust removal device; 21. Throttling plate; 22. Water circuit assembly; 221. Circulation pipe; 222. Inlet angle valve; 223. Check valve; 224. Spray interface pipe; 225. Water curtain interface pipe; 226. Spray angle valve; 23. Spray assembly; 231. Spray pipe; 232. Spray head;

[0030] 3. Filtering device; 31. Filter frame; 32. Filter plate; 321. Second filter hole. Detailed Implementation

[0031] 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 parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0032] In this invention, the terms "comprising," "including," "having," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0033] In this invention, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following related objects have an "and / or" relationship.

[0034] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," "fixed," "combined," "coupled," and "installed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can be a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For example, a direct connection refers to two parts or components being connected together without an intermediate component, while an indirect connection refers to two parts or components each being connected to at least one intermediate component, with the connection achieved through the intermediate component. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Furthermore, "connected" and "coupled" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0035] In this invention, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the value and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​not using relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0036] In this invention, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can be performed by one part, one component, or a combination of multiple parts.

[0037] In this utility model, the terms "upper," "lower," "left," "right," "front," and "rear," etc., refer to the orientation or positional relationships shown in the accompanying drawings. They are used solely for ease of description and simplification of operation, 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. Furthermore, in the context, it should be understood that when an element is mentioned as being "upper" or "lower" of another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as "upper side," "lower side," "left side," "right side," "front side," and "rear side" not only represent positive orientation but can also be understood as lateral orientation. For example, "above," "on top of," "upper side of," and "above" of the first feature and the second feature include the first feature being directly above, to the upper left, to the upper right, to the upper front, and to the upper rear of the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature. The terms "below," "under," "below," and "below" for "first feature" and "second feature" include situations where the first feature is directly below, to the lower left, to the lower right, in front of, or behind the second feature, or simply indicate that the first feature is at a lower horizontal level than the second feature. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no specific meaning.

[0038] like Figures 1-3 As shown, this embodiment provides a wet dust removal device, including a housing 1, a dust removal device 2, and a filter device 3. The housing 1 has a dust removal chamber 11 and a filter water tank 12 disposed below the dust removal chamber 11. The dust removal device 2 is disposed in the dust removal chamber 11 and includes a throttling plate 21 and a water curtain assembly. The water curtain assembly is disposed above the throttling plate 21 and is used to generate a water curtain on the air inlet side of the throttling plate 21. The dust-laden gas passes through the water curtain, and the dust particles therein are captured by the water curtain.

[0039] The filtration device 3 is installed inside the filter tank 12 and includes a filter frame 31 and a filter plate 32. The filter frame 31 has an open top and multiple first filter holes evenly distributed on its surface. The filter plate 32 has multiple second filter holes 321 evenly distributed on its surface. The filter plate 32 is inclined from top to bottom, with its upper end located below the water curtain to collect dust removal wastewater. The lower end of the filter plate 32 extends to the upper opening of the filter frame 31. The filter plate 32 acts as a guide, directing the dust removal wastewater to flow sequentially through the filter plate 32 into the filter frame 31. A portion of the dust removal wastewater passes through the second filter holes 321 and falls into the filter tank 12 and is discharged. Another portion of the dust removal wastewater flows over the surface of the filter plate 32 and enters the filter frame 31, eventually passing through the first filter holes and being discharged. The area of ​​the first filter hole is smaller than that of the second filter hole 321. A portion of the dust removal wastewater undergoes primary filtration through the second filter hole 321, while the remaining wastewater undergoes secondary filtration through the smaller first filter hole. This effectively reduces the dust content in the wastewater. The filter plate 32 serves to filter and divert the wastewater, effectively preventing excessive water volume from causing poor drainage in the filter frame 31 and avoiding overflow of the wastewater from the top opening of the filter frame 31. Thus, while ensuring the efficiency of wastewater discharge, the dust content in the wastewater is reduced, preventing dust from accumulating and clogging the sewer.

[0040] In some optional embodiments, the pore size of the first filter hole is 1.4~1.6mm, which can effectively filter most of the dust particles in the dust removal wastewater and effectively reduce the dust content in the dust removal wastewater.

[0041] In this embodiment, the aperture of the first filter hole is 1.5 mm. Optionally, the aperture of the first filter screen may include, but is not limited to, 1.4 mm or 1.6 mm, and is not limited here.

[0042] like Figure 2 and Figure 3 As shown, in some optional embodiments, the second filter hole 321 is an oblong hole, and the long axis of the oblong hole is aligned with the tilt direction of the filter plate 32. On the one hand, when water flows downward along the surface of the filter plate 32, the long axis of the oblong hole is aligned with the tilt direction of the filter plate 32, which allows the water to quickly pass through the channel along the long axis extension direction, improving the water flow efficiency and effectively preventing water overflow on the surface of the filter plate 32 due to excessive water volume, thus solving the problem of poor drainage caused by water surface tension and flow direction conflict in traditional round holes. On the other hand, the short axis dimension of the oblong hole determines the interception accuracy, and the design of the long axis being aligned with the tilt direction allows the water to flow along the wall when passing through the channel. Dust particles are more likely to collide with the edge of the short axis of the channel due to inertia and be intercepted on the filter plate 32, effectively reducing the dust content. At the same time, the gravitational component formed by the tilt angle causes the dust to slide downward along the surface of the filter plate 32 and enter the filter frame 31 under the impact of the water flow, realizing the automatic cleaning of the filter plate 32.

[0043] In some optional embodiments, the major axis of the waist-shaped hole is 9.5~10.5mm and the minor axis diameter is 1.5~2.5mm, which can effectively filter large particles of dust in the dust removal wastewater and help reduce the dust content in the dust removal wastewater.

[0044] In this embodiment, the major axis length of the oblong hole is 10mm and the minor axis diameter is 2mm. Optionally, the major axis length of the oblong hole may include, but is not limited to, 9.5mm, 9.6mm, 10.1mm or 10.5mm, and the minor axis diameter may include, but is not limited to, 1.5mm, 1.8mm or 2.5mm, and is not limited to these values.

[0045] In some optional embodiments, the angle between the filter plate 32 and the horizontal direction is 20° to 60°, so that the dust-laden wastewater maintains a suitable flow rate when flowing downward along the surface of the filter plate 32. This avoids the water flow being too slow due to the angle being too small, and the dust accumulating and clogging the second filter hole 321. It also prevents the water flow from being too fast due to the angle being too large, which would shorten the contact time with the second filter hole 321 and reduce the dust interception rate.

[0046] In this embodiment, the water curtain assembly includes an overflow channel, and the water channel assembly 22 continuously supplies water into the overflow channel to generate a water curtain on the air inlet side of the throttling plate 21.

[0047] It should be noted that the exhaust gas discharge pipe of the airflow drying machine is equipped with a wind speed and air volume detection instrument. The dust concentration requirements of the exhaust pipe are much higher than the emission standards. The existing wet water curtain dust collector cannot further reduce the dust concentration, resulting in a high probability of instrument failure. In addition, the dust remaining in the exhaust pipe is prone to settling and accumulating, increasing the risk of pipe blockage and affecting the exhaust gas emission efficiency and the overall operational stability of the equipment.

[0048] To solve the above problems, such as Figure 1 and Figure 4 As shown, in some optional embodiments, the dust removal device 2 further includes a water circuit assembly 22 and a spray assembly 23. The spray assembly 23 includes a spray pipe 231 and multiple spray heads 232. The spray pipe 231 is horizontally arranged on the air inlet side of the water curtain, and multiple spray heads 232 are evenly arranged along its length. The input end of the water circuit assembly 22 is connected to a water source, and the output end of the water circuit assembly 22 is connected to the water curtain assembly and the water inlet end of the spray pipe 231, respectively. Multiple spray heads 232 spray water mist from top to bottom, forming a water mist area on the air inlet side of the water curtain. The dust-laden gas first comes into contact with the water mist sprayed by the spray heads 232, and after one spray for dust removal and cooling, the treated dust-laden gas undergoes a second dust removal and cooling process through the water curtain. Practical application has proven that the dust concentration in the exhaust gas can be controlled below 2 mg / m³, greatly reducing the probability of failure of the air velocity and air volume detection instruments in the exhaust pipe and the risk of dust settling and clogging in the exhaust pipe.

[0049] Meanwhile, the water circuit component 22 supplies water to the water curtain and spray pipe 231. Taking advantage of the characteristic that the wet water curtain dust collector needs to be continuously replenished with water during operation, the replenishment water of the wet water curtain dust collector is sprayed into the equipment in the form of spraying, which facilitates the transformation of the wet water curtain dust collector that has been put into use and has high practicality.

[0050] Specifically, the water circuit component 22 also includes a circulating water pump and a circulating pipe 221; the input end of the circulating pipe 221 is connected to the outlet of the filter water tank 12, the circulating water pump is located between the two, and the output end of the circulating pipe 221 is connected to the inlet of the water curtain component and the spray pipe 231 respectively. The circulating water pump can drive the filtered water in the filter water tank 12 to enter the water curtain component and the spray component 23 through the circulating pipe 221, so as to realize the recycling of water resources.

[0051] Furthermore, the water circuit assembly 22 also includes an inlet angle valve 222 and a check valve 223. The check valve 223 and the inlet angle valve 222 are sequentially installed between the inlet and outlet ends of the circulation pipe 221. The inlet angle valve 222 can flexibly adjust the circulation water flow rate to adapt to different water supply needs of the water curtain and spray; the check valve 223 can prevent the circulation water from flowing back and impacting the circulation water pump or flowing back to the filter water tank 12 to contaminate the filtered water, ensuring a stable water supply direction, protecting the water pump components, and ensuring a continuous and stable water supply for the water curtain and spray, maintaining the dust removal effect, and reducing the risk of equipment failure.

[0052] Furthermore, the output end of the circulation pipe 221 is connected in parallel to a spray interface pipe 224 and a water curtain interface pipe 225. The spray interface pipe 224 is connected to the water inlet of the spray pipe 231, and the water curtain interface pipe 225 is connected to the water inlet of the water curtain component. A spray angle valve 226 is installed on the spray interface pipe 224. By adjusting the spray angle valve 226, the water supply to the spray component 23 can be flexibly adjusted to meet the pretreatment needs of exhaust gases with different dust contents, ensuring dust removal efficiency while avoiding water waste. Simultaneously, the independent pipeline design facilitates individual maintenance of any component. When the spray head 232 is blocked, maintenance can be performed by closing the spray angle valve 226 without stopping the water curtain supply, ensuring continuous operation of the dust removal device 2, reducing production interruptions due to maintenance, and further improving equipment stability and ease of maintenance.

[0053] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A wet dust removal device, characterized in that, include: The housing (1) has a dust removal chamber (11) inside and a filter water tank (12) disposed below the dust removal chamber (11). A dust removal device (2) is installed in the dust removal chamber (11) and includes a throttling plate (21) and a water curtain assembly. The water curtain assembly is installed above the throttling plate (21) and is used to generate a water curtain on the air inlet side of the throttling plate (21). A filtration device (3) is installed inside the filtration tank (12) and includes a filter frame (31) and a filter plate (32). The filter frame (31) has an opening at the top and a plurality of first filter holes are evenly distributed on its surface. The filter plate (32) has a plurality of second filter holes (321) evenly distributed on its surface. The filter plate (32) is inclined from top to bottom. The upper end of the filter plate (32) is located below the water curtain and is used to receive dust removal wastewater. The lower end of the filter plate (32) extends to the upper opening of the filter frame (31). The area of ​​the first filter hole is smaller than the area of ​​the second filter hole (321).

2. The wet dust removal equipment according to claim 1, characterized in that, The diameter of the first filter pore is 1.4~1.6mm.

3. The wet dust removal equipment according to claim 1, characterized in that, The second filter hole (321) is a waist-shaped hole, and the long axis of the waist-shaped hole is consistent with the tilt direction of the filter plate (32).

4. The wet dust removal equipment according to claim 3, characterized in that, The major axis of the waist-shaped hole is 9.5~10.5mm, and the minor axis diameter is 1.5~2.5mm.

5. The wet dust removal equipment according to claim 1, characterized in that, The angle between the filter plate (32) and the horizontal direction is 20°~60°.

6. The wet dust removal equipment according to claim 1, characterized in that, The dust removal device (2) further includes a water circuit assembly (22) and a spray assembly (23). The spray assembly (23) includes a spray pipe (231) and multiple spray heads (232). The spray pipe (231) is horizontally arranged on the air inlet side of the water curtain. Multiple spray heads (232) are evenly arranged along the length of the spray pipe (231). The input end of the water circuit assembly (22) is connected to a water source. The output end of the water circuit assembly (22) is connected to the water curtain assembly and the water inlet end of the spray pipe (231) respectively.

7. The wet dust removal equipment according to claim 6, characterized in that, The water circuit assembly (22) also includes a circulating water pump and a circulating pipe (221); the input end of the circulating pipe (221) is connected to the outlet of the filter water tank (12), the circulating water pump is located between the two, and the output end of the circulating pipe (221) is connected to the inlet of the water curtain assembly and the spray pipe (231) respectively.

8. The wet dust removal equipment according to claim 7, characterized in that, The water circuit assembly (22) also includes an inlet angle valve (222) and a check valve (223). The check valve (223) and the inlet angle valve (222) are sequentially arranged between the input end and the output end of the circulation pipe (221).

9. The wet dust removal equipment according to claim 8, characterized in that, The output end of the circulation pipe (221) is connected in parallel to a spray interface pipe (224) and a water curtain interface pipe (225). The spray interface pipe (224) is connected to the water inlet end of the spray pipe (231), and the water curtain interface pipe (225) is connected to the water inlet end of the water curtain assembly. A spray angle valve (226) is provided on the spray interface pipe (224).

10. The wet dust removal equipment according to any one of claims 6 to 9, characterized in that, The water curtain assembly includes an overflow trough, and the water circuit assembly (22) generates the water curtain on the air intake side of the throttling plate (21) by continuously supplying water into the overflow trough.

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