Breathable filter bag with hydrophobic structure

Abstract

The invention belongs to the field of filter bags, and particularly relates to a breathable filter bag with a hydrophobic structure, a ring frame mechanism comprises a ring frame, and the ring frame is provided with an outer filter bag clamping ring, a middle filter bag clamping ring and an inner filter bag clamping ring at intervals from outside to inside; an outer filter bag, a middle filter bag and an inner filter bag are sequentially clamped in the three parts, and a sealing cover for blocking is formed at the bottom of the outer filter bag; a hydrophobic layer is arranged on the end surface, facing the outer filter bag, of the middle filter bag; a hydrophobic layer is compositely formed on a middle filter bag, a condensation mechanism assists water vapor to flocculate into water drops and transmit the water drops, a condensation pipe network is uniformly arranged in the hydrophobic layer, a cooling medium is transmitted in the condensation pipe network through a condensation device, the condensation pipe network is kept in a low-temperature state, and the water vapor is accelerated to flocculate into the water drops under the influence of low temperature at the condensation pipe network. Due to the fact that the gravity of the water drops is large, the water drops can drop downwards along the pipe wall of the condensation pipe network, the upper portion of the hydrophobic layer is in a low-water-content state all the time, it is guaranteed that water vapor is efficiently treated on the hydrophobic layer, and subsequent dust treatment is facilitated.

Description

Technical Field

[0001] This invention relates to the field of filter bags, and more specifically to a breathable filter bag with a hydrophobic structure. Background Technology

[0002] Filter bags have excellent chemical stability and heat resistance, representing the highest performance in the filter media industry and the highest-end variety among all commonly used filter materials, achieving high levels in filtration efficiency and filtration precision.

[0003] Filter bags are a key component in the operation of baghouse dust collectors. Cylindrical filter bags are usually suspended vertically in the dust collector. The fabric and design of the filter bags should strive for high-efficiency filtration, easy dust removal, and durability.

[0004] Existing filter bags lack hydrophobic structures. When handling dust-laden water vapor, the water vapor and dust adhere to the filter cloth surface and block the filtration gaps, resulting in the ineffective filtration of the subsequent dust-laden water vapor transmitted to the filter bag. Some filter cloths are coated with hydrophobic coatings, but as the usage time increases, some water vapor will penetrate the hydrophobic coating and clump together at the contact end with the filter cloth layer, resulting in a decrease in filtration efficiency and failing to meet the needs of long-term use. Summary of the Invention

[0005] (I) Purpose of the Invention

[0006] To address the technical problems existing in the background art, the present invention proposes a breathable filter bag with a hydrophobic structure, featuring a layered design and hydrophobic water-attracting properties to prevent filter cloth layer caking.

[0007] (II) Technical Solution

[0008] To solve the above technical problems, the present invention provides a breathable filter bag with a hydrophobic structure. The ring frame mechanism includes a ring frame, wherein an outer filter bag clamping ring, a middle filter bag clamping ring, and an inner filter bag clamping ring are installed at intervals from the outside to the inside of the ring frame.

[0009] The three filters sequentially hold an outer filter bag, a middle filter bag, and an inner filter bag, with a sealing cap formed at the bottom of the outer filter bag for sealing.

[0010] The end face of the middle filter bag facing the outer filter bag is provided with a hydrophobic layer;

[0011] The condensation mechanism includes a condensation pipe network installed in the inner layer of the hydrophobic layer. The condensation pipe network is used to flocculate water droplets. One end of the condensation pipe network is connected to the condensation device, and the other end, which penetrates the hydrophobic layer, extends into the water storage platform.

[0012] The cleaning mechanism includes a cleaning frame disposed between the outer filter bag and the hydrophobic layer. The cleaning frame moves up and down along the outer wall of the hydrophobic layer, and its end face attached to the hydrophobic layer holds the cleaning part.

[0013] Preferably, the filter bag has a breathable structure and the hydrophobic layer has a hydrophobic structure, and the two are composite molded together.

[0014] Preferably, the combination of the filter bag and the hydrophobic layer has a “wave” structure.

[0015] Preferably, the condenser network includes ring rods and vertical rods, both of which are hollow structures.

[0016] Preferably, the combination of the water storage platform, the middle filter bag, and the hydrophobic layer divides the interlayer of the outer filter bag and the inner filter bag into two independent cavities, one of which is a hydrophobic cavity and the other is a breathable cavity.

[0017] Preferably, one end of the condensate pipe network that extends into the water storage platform is a water intake structure, and a drainage device for draining water is installed at the bottom of the water storage platform.

[0018] Preferably, the cleaning mechanism further includes a bracket symmetrically installed on the inner wall of the outer filter bag, a screw is installed in the middle of the bracket, guide rods are provided on both sides of the screw, the screw is connected to the output end of the drive motor, and a lead screw slide is sleeved on the outer wall, which moves along the guide rods, and the lead screw slide drives the cleaning frame to move up and down.

[0019] Preferably, the cleaning part held on the cleaning frame is a brush, and the bristles of the cleaning part are attached to the hydrophobic layer.

[0020] Preferably, the cleaning part held on the cleaning frame is an airbag component. The cleaning part has an air storage chamber and is connected to an external air supply device. The end face of the cleaning part facing the hydrophobic layer is deformed by inflating and deflating the air.

[0021] Preferably, the outer filter bag, the middle filter bag, and the inner filter bag are all breathable structures, and the mesh size of the filter cloth increases gradually along the dust transport direction.

[0022] The above-mentioned technical solution of the present invention has the following beneficial technical effects: a hydrophobic layer is compositely formed on the filter bag, a condensation mechanism assists in the flocculation of water vapor into water droplets and their transfer, a condensation pipe network is uniformly arranged in the hydrophobic layer, a cooling medium is transferred in the condensation pipe network through a condensation device, and the condensation pipe network is kept at a low temperature. Water vapor is accelerated to flocculate into water droplets at the condensation pipe network due to the low temperature. Because the water droplets have a large gravity, they can drip down along the pipe wall of the condensation pipe network, so that the upper part of the hydrophobic layer is always in a state of low water content, ensuring efficient treatment of water vapor in the hydrophobic layer and facilitating subsequent dust treatment. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the ring frame mechanism of the present invention;

[0025] Figure 3 This is a schematic diagram of the filter bag structure of the present invention;

[0026] Figure 4 This is a schematic cross-sectional view of the filter bag structure of the present invention;

[0027] Figure 5 This is a schematic diagram of the condensation mechanism of the present invention;

[0028] Figure 6 This is a schematic diagram of the cleaning mechanism structure of the present invention.

[0029] Figure label:

[0030] 11. Ring frame; 12. Outer filter bag clamping ring; 13. Middle filter bag clamping ring; 14. Inner filter bag clamping ring; 2. Outer filter bag; 3. Middle filter bag; 4. Hydrophobic layer; 5. Inner filter bag; 61. Condensation pipe network; 62. Condensation device; 63. Water storage platform; 64. Drainage device; 71. Support; 72. Screw; 73. Guide rod; 74. Drive motor; 75. Lead screw slide; 76. Cleaning frame; 77. Cleaning section; 8. Cover. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0032] like Figure 1-6 As shown, the present invention proposes a breathable filter bag with a hydrophobic structure. The ring frame mechanism includes a ring frame 11, and the ring frame 11 is provided with an outer filter bag clamping ring 12, a middle filter bag clamping ring 13 and an inner filter bag clamping ring 14 spaced apart from the outside to the inside.

[0033] The three bags sequentially hold an outer filter bag 2, a middle filter bag 3, and an inner filter bag 5. The bottom of the outer filter bag 2 is formed with a sealing cap 8 for sealing.

[0034] The end face of the middle filter bag 3 facing the outer filter bag 2 is provided with a hydrophobic layer 4. The middle filter bag 3 is a breathable structure and is made of breathable material. It can intercept dust particles while gas passes through. The hydrophobic layer 4 is a hydrophobic structure and is made of hydrophobic material covering the surface of the middle filter bag 3, so that water droplets cannot wet and adhere, achieving hydrophobicity of dust-containing water vapor and preventing it from affecting the breathable structure of the middle filter bag 3. The two are compositely formed into an integral structure through hot pressing, spraying and lamination processes, which has hydrophobic and breathable properties.

[0035] The condensation mechanism includes a condensation pipe network 61 installed in the inner layer of the hydrophobic layer 4. The condensation pipe network 61 is used to flocculate water droplets. One end of the condensation pipe network 61 is connected to the condensation device 62, and the other end that penetrates the hydrophobic layer 4 extends into the water storage platform 63.

[0036] The cleaning mechanism includes a cleaning frame 76 disposed between the outer filter bag 2 and the hydrophobic layer 4. The cleaning frame 76 moves up and down along the outer wall of the hydrophobic layer 4, and its end face attached to the hydrophobic layer 4 holds the cleaning part 77.

[0037] It should be noted that the outer filter bag 2, the middle filter bag 3, and the inner filter bag 5 are all breathable structures. The mesh size of the filter cloth increases gradually along the dust transmission direction. The outer filter bag 2 has a low mesh size to intercept large dust particles, the middle filter bag 3 has a medium mesh size and combines a hydrophobic layer to handle water vapor and fine dust particles, and the inner filter bag 5 has a high mesh size to finely filter the dust gas processed by the middle filter bag 3, ensuring the cleanliness of the gas after filtration. The graded filtration reduces the load on the filter cloth of a single filter bag and extends the overall service life of the filter bag.

[0038] In this embodiment, a hydrophobic layer 4 is composite-formed on the middle filter bag 3. The hydrophobic layer 4 itself has a hydrophobic effect, but water vapor will remain inside the hydrophobic layer 4. After long-term use, a water film will form on the surface, affecting the penetration of gas. A condensation mechanism is designed to assist water vapor in flocculating into water droplets and transferring them. The condensation pipe network 61 is uniformly arranged inside the hydrophobic layer 4. The cooling medium is transferred inside the condensation pipe network 61 through the condensation device 62 to keep the condensation pipe network 61 at a low temperature. Water vapor is accelerated to flocculate into water droplets at the condensation pipe network 61. Because the water droplets have a large gravity, they can drip down along the pipe wall of the condensation pipe network, so that the upper part of the hydrophobic layer 4 is always in a state of low water content, ensuring efficient treatment of water vapor in the hydrophobic layer 4 and facilitating subsequent dust treatment.

[0039] In one embodiment, the combination of the middle filter bag 3 and the hydrophobic layer 4 has an overall "wave" structure. The "wave" structure is a regular pleated shape, which increases the surface area and airflow channels of the middle filter bag 3 and the hydrophobic layer, improves the dust adsorption capacity, and ensures that the airflow is evenly distributed throughout the combination of the middle filter bag 3 and the hydrophobic layer 4.

[0040] It is understandable that the combination of the middle filter bag 3 and the hydrophobic layer 4 has a "wave" structure. When caking occurs, the adhesion stability of water vapor and dust is poor, and it is easy to separate when affected by external forces, which facilitates the peeling off of the caking area.

[0041] like Figure 4 and Figure 5As shown, the condenser network 61 includes ring rods and vertical rods, both of which are hollow structures. The ring rods are horizontal annular pipes, evenly distributed inside the hydrophobic layer 4. The vertical rods are vertical pipes, connected to the ring rods to form a grid-like network. The middle part is designed to transport the cooling medium. The water vapor penetrating the hydrophobic layer 4 is condensed through the conduction of the pipe wall, realizing the condensation and collection of water droplets. After condensation, the water droplets can drip down along the vertical rod section of the condenser network 61 for collection of condensed water.

[0042] It should be added that ordinary hydrophobic materials are directly adhered to the surface of the filter cloth and lack a supporting structure. The condenser network 61 is a grid-like network frame, which can serve as the supporting skeleton of the hydrophobic layer 4, significantly improving the stability of the hydrophobic layer 4 in the middle filter bag 3.

[0043] It is understandable that the end of the condensate pipe network 61 that extends into the water storage platform 63 is a water intake structure, and a drainage device 64 for drainage is installed at the bottom of the water storage platform 63; the end of the condensate pipe network 61 that extends into the water storage platform 63 is the end, and when it acts as a water intake structure, it can be set into a funnel shape or a cone shape, using gravity to guide the water droplets transmitted along the vertical rod into the water storage platform 63. The drainage device 64 includes a drainage pump, a drainage pipe and a timer device, which can periodically start the drainage pump through the timer device, and drain the water in the water storage platform 63 through the drainage pipe to prevent the water storage platform 63 from accumulating too much water and affecting the drainage and filtration effects.

[0044] like Figure 4 As shown, the combination of the water storage platform 63, the middle filter bag 3, and the hydrophobic layer 4 divides the interlayer of the outer filter bag 2 and the inner filter bag 5 into two independent cavities, one of which is a hydrophobic cavity and the other is a breathable cavity.

[0045] The water storage platform 63 is set inside the cover 8. The water storage platform 63 separates the interlayer between the outer filter bag 2 and the inner filter bag 5 into an independent space. Since the water vapor to be treated is transmitted in one direction, the water vapor needs to be condensed and dust removed at the hydrophobic cavity before it can enter the ventilated cavity. The gas passing through the ventilated cavity is dry gas, and it needs to be filtered again during the process, which realizes water vapor separation and avoids water vapor entering the ventilated cavity from affecting the dryness of the discharged treated gas.

[0046] like Figure 6 As shown, the cleaning mechanism also includes a bracket 71 symmetrically installed on the inner wall of the outer filter bag 2. A screw 72 is installed in the middle of the bracket 71, and guide rods 73 are provided on both sides of the screw 72. The screw 72 is connected to the output end of the drive motor 74, and a screw slide 75 that moves along the guide rods 73 is sleeved on the outer wall. The screw slide 75 drives the cleaning frame 76 to move up and down.

[0047] As an example of the up-and-down movement of the cleaning frame 76: the drive motor 74 drives the screw 72 to spiral inside the bracket 71. Since the screw 72 and the lead screw slide 75 are threadedly connected, the lead screw slide 75 makes a vertical linear displacement along the guide rod 73, which drives the cleaning frame 76 and its connected cleaning part 77 to clean the hydrophobic layer 4 of the filter bag 3.

[0048] In one embodiment, the cleaning part 77 held on the cleaning frame 76 is a brush. The bristle surface of the cleaning part 77 is attached to the hydrophobic layer 4. The brush is made of corrosion-resistant hard bristles. By physically scraping the surface of the hydrophobic layer 4, it removes hardened dust and scale, restores hydrophobicity and breathability, and facilitates the treatment of highly adhesive dust.

[0049] In another embodiment, the cleaning part 77 held on the cleaning frame 76 is an airbag component. The cleaning part 77 has an air storage cavity and is connected to an external air supply device. The end face of the cleaning part 77 facing the hydrophobic layer 4 is deformed by inflating and deflating the air.

[0050] When inflated, the airbag expands and deforms, and its convex deformed surface presses tightly against the hydrophobic layer 4. By squeezing, the sludge and residual moisture attached to the hydrophobic layer 4 are peeled off. The airbag cleaning method causes less damage to the hydrophobic layer 4, and the inflation and deflation process can simulate squeezing action at intervals. The squeezing force can be controlled by deformation of different amplitudes, resulting in better cleaning effect.

[0051] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of the invention and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of the invention should be included within the protection scope of the invention. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A breathable filter bag with a hydrophobic structure, characterized in that, The ring frame mechanism includes a ring frame (11), wherein an outer filter bag clamping ring (12), a middle filter bag clamping ring (13) and an inner filter bag clamping ring (14) are installed at intervals from the outside to the inside of the ring frame (11); The three bags sequentially hold an outer filter bag (2), a middle filter bag (3), and an inner filter bag (5). The bottom of the outer filter bag (2) is formed with a cap (8) for sealing. The end face of the middle filter bag (3) facing the outer filter bag (2) is provided with a hydrophobic layer (4); The condensation mechanism includes a condensation pipe network (61) installed in the inner layer of the hydrophobic layer (4). The condensation pipe network (61) is used to flocculate water droplets. One end of the condensation pipe network (61) is connected to the condensation device (62), and the other end, which penetrates the hydrophobic layer (4), extends into the water storage platform (63). The cleaning mechanism includes a cleaning frame (76) disposed between the outer filter bag (2) and the hydrophobic layer (4). The cleaning frame (76) moves up and down along the outer wall of the hydrophobic layer (4), and its end face attached to the hydrophobic layer (4) holds the cleaning part (77).

2. The air-permeable filter bag with a hydrophobic structure according to claim 1, characterized in that, The filter bag (3) has an air-permeable structure, and the hydrophobic layer (4) has a hydrophobic structure; the two are combined and molded together.

3. The air-permeable filter bag with a hydrophobic structure according to claim 1, characterized in that, The combination of the middle filter bag (3) and the hydrophobic layer (4) has a "wave" structure.

4. The air-permeable filter bag with a hydrophobic structure according to claim 1, characterized in that, The condenser pipe network (61) includes ring rods and vertical rods, both of which are hollow structures.

5. A breathable filter bag with a hydrophobic structure according to claim 1, characterized in that, The combination of the water storage platform (63), the middle filter bag (3), and the hydrophobic layer (4) divides the interlayer of the outer filter bag (2) and the inner filter bag (5) into two independent cavities, one of which is a hydrophobic cavity and the other is a breathable cavity.

6. A breathable filter bag with a hydrophobic structure according to claim 1, characterized in that, The end of the condensate pipe network (61) that extends into the water storage platform (63) is a water intake structure, and a drainage device (64) for draining water is installed at the bottom of the water storage platform (63).

7. A breathable filter bag with a hydrophobic structure according to claim 1, characterized in that, The cleaning mechanism also includes a bracket (71) symmetrically installed on the inner wall of the outer filter bag (2). A screw (72) is installed in the middle of the bracket (71). Guide rods (73) are provided on both sides of the screw (72). The screw (72) is connected to the output end of the drive motor (74). A screw slide (75) that moves along the guide rod (73) is sleeved on the outer wall. The screw slide (75) drives the cleaning frame (76) to move up and down.

8. A breathable filter bag with a hydrophobic structure according to claim 1, characterized in that, The cleaning part (77) held on the cleaning frame (76) is a brush, and the brush bristles of the cleaning part (77) are attached to the hydrophobic layer (4).

9. A breathable filter bag with a hydrophobic structure according to claim 1, characterized in that, The cleaning part (77) held on the cleaning frame (76) is an airbag. The cleaning part (77) has an air storage chamber and is connected to an external air supply device. The end face of the cleaning part (77) facing the hydrophobic layer (4) is deformed by inflating and deflating the air.

10. A breathable filter bag with a hydrophobic structure according to claim 1, characterized in that, The outer filter bag (2), the middle filter bag (3) and the inner filter bag (5) are all breathable structures, and the mesh size of the filter cloth increases gradually along the dust transmission direction.

Images