A high-efficiency, low-wind-resistance dry filtration device

Abstract

This invention discloses a high-efficiency, low-resistance dry filtration device, comprising a horizontally placed dry filter box with open ends. One open end serves as an air inlet, and the other open end serves as an air outlet. The dry filter box contains a filter chamber with several parallel, pull-out filter screens arranged side-by-side. Each pull-out filter screen is inserted into the filter chamber from top to bottom along its length. A clamping device is provided on the dry filter box to fix the pull-out filter screens. This filtration configuration increases the airflow area, reduces working air resistance, improves ventilation performance, reduces contamination, and reduces maintenance workload. The filter screen arrangement technology effectively increases the airflow area and self-cleaning ability, reducing working air resistance by more than 30%, achieving energy savings of more than 35% in the process section, and extending the filter screen cleaning cycle by more than 3 times.

Description

Technical Field

[0001] This invention relates to the field of textile machinery technology, specifically to a high-efficiency, low-wind-resistance dry filtration device. Background Technology

[0002] The treatment of waste gas containing high-temperature oil fumes and waste fibers in the textile manufacturing industry has always faced challenges such as cumbersome technical processes, low equipment efficiency, and low safety. The main reason is that the high-temperature waste gas meets all the conditions for deflagration. Although cooling the waste gas improves safety, a large amount of oil fumes liquefy into liquid oil, which mixes with the waste fibers and particulate matter in the waste gas and easily adheres to the inner wall of the treatment channel, causing a decrease in equipment efficiency or even failure, and resulting in greater secondary pollution.

[0003] The current ideal technical process involves separating and treating pollutants in three states separately from high-temperature exhaust gas, with significant results. This involves sequentially performing dry high-temperature coarse and medium filtration to remove lint and larger solid particles, followed by cooling spray cleaning to remove micron-sized non-gaseous contaminants. Finally, wet electrostatic removal of gaseous contaminants is performed. Due to the high temperature, flammability, complex composition, and large volume of the exhaust gas, current technologies often use filters for pre-filtration. This involves the high-temperature exhaust gas passing vertically through the filter to remove some large lint. However, lint and fumes are petrochemical products from the same source; while they are relatively lightly adsorbed in suspension, they rapidly adhere to the filter after passing through it, increasing filter resistance and eventually causing filter failure.

[0004] Reference Appendix Figure 1 In existing technologies, the filter screen is positioned perpendicular to the airflow direction. This means that impurities carried by the airflow directly impact and pass through the filter screen, making the filtration accuracy entirely determined by the screen's pore size. When the exhaust gas contains a large amount of material smaller than the mesh size, it cannot be effectively filtered. Furthermore, when the length of fibers or other particles in the exhaust gas exceeds the filter screen's pore size, they can adhere to the filter surface. Over time, this accumulates into a thick layer of fibers. If not cleaned promptly, this can clog the screen, preventing the exhaust gas from passing through and causing the entire purification line to malfunction.

[0005] Vertical filter structures require frequent disassembly and cleaning, leading to secondary pollution. If cleaning is not timely, it can cause lint buildup, clogging, and even fire hazards. Current common methods use larger pore sizes, but this reduces filtration efficiency, causes severe contamination of downstream processing equipment, and the mixing of various types of contaminants further complicates the process of harmless reprocessing. Summary of the Invention

[0006] The purpose of this invention is to provide a high-efficiency, low-resistance dry filtration device to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a high-efficiency, low-wind-resistance dry filtration device, characterized in that it includes a horizontally placed dry filter box, with both ends of the dry filter box open, one end open as an air inlet and the other end open as an air outlet. The dry filter box is provided with a filter chamber, and a plurality of pull-out filter screens are arranged side by side and parallel to each other in the filter chamber. Each pull-out filter screen is inserted into the filter chamber from top to bottom along the length direction of the filter chamber. A clamping device for fixing the plurality of pull-out filter screens is provided on the dry filter box.

[0008] Each pair of pull-out filters forms a group. The inner ends of the two pull-out filters in a group are connected by a slide rail assembly, and the outer ends are open and positioned directly opposite the air inlet. The two pull-out filters in a group form a pre-filter air passage. The outer ends of the pull-out filters in adjacent groups are connected by a slide rail assembly. The pull-out filters in adjacent groups and the two outermost pull-out filters and the dry filter box wall form post-filter ventilation channels. As the exhaust gas moves from the air inlet to the air outlet, it enters any group of pre-filter air passages in the filter chamber, moves along the surface of the pull-out filters on both sides, is filtered, and then enters the post-filter ventilation channel and exits from the air outlet.

[0009] The technical problem to be solved by the present invention can also be achieved by the following technical solution: the dry filter box is provided with a main box body with a rectangular cross-section, the filter chamber is the inner cavity of the main box body, and an air inlet channel and an air outlet channel are respectively provided at both ends of the main box body. The air inlet channel and the air outlet channel are sealed to the main box body. The air inlet is provided on the end face of the air inlet channel, and the air outlet is provided on the end face of the air outlet channel. The air inlet channel and the air outlet channel are both set to gradually narrow from the end connected to the main box body towards their end face. An external connecting flange is provided on the end face of the air inlet channel and the air outlet channel.

[0010] The technical problem to be solved by the present invention can also be achieved by the following technical solution: cleaning windows are provided on the lower part of both sides of the main body, and cleaning doors are provided at the cleaning windows. The cleaning doors are sealed and fixed to the main body by screws.

[0011] The technical problem to be solved by this invention can also be achieved through the following technical solution: several parallel, vertically inserted filter screens are arranged in the filter chamber. The pull-out filter screens are parallel to the air inlet direction or at a certain angle to the air inlet direction, with the angle being 10°-30°. The pull-out filter screen is an independent component, removable and replaceable. The pore size density and material of the pull-out filter screen are selected to correspond to the composition of the waste gas to be treated. Using a certain angle can further enhance the filtration and self-cleaning effects.

[0012] The technical problem to be solved by the present invention can also be achieved by the following technical solution: the slide assembly includes slide support plates that are vertically arranged alternately near the air inlet or air outlet, and slide grooves that cooperate with the pull-out filter screens are provided at one or both ends of the slide support plates. The outer ends of two pull-out filter screens in adjacent groups are located in two slide grooves at the air inlet, and the inner ends of two pull-out filter screens in the same group are located in two slide grooves at the air outlet.

[0013] The technical problem to be solved by the present invention can also be achieved by the following technical solution: each pull-out filter screen is provided with a filter screen frame, a porous filter screen is provided in the filter screen frame, and an end limiting frame is provided at the upper end of the filter screen frame; the pressing device includes a pressing frame that cooperates with the end limiting frame, and several hooks are provided at both ends of the pressing frame, and quick buckles that cooperate with the hooks are provided on the outer wall of the dry filter box.

[0014] The technical problem to be solved by the present invention can also be achieved by the following technical solution: a fire sprinkler pipe is provided inside the air inlet side of the dry filter box. The fire sprinkler pipe is provided with at least three sets of branch pipes from top to bottom. Each set of branch pipes is provided with several nozzles. Each nozzle is set directly opposite the pre-filter air passage.

[0015] The technical problem to be solved by this invention can also be achieved through the following technical solution: A safety steam pipeline and a sewage discharge pipeline are respectively installed under the bottom plate of the dry filter box. Temperature detectors are installed in the air inlet and outlet channels. When the temperature detector detects an abnormal exhaust gas temperature, it sends a signal, and steam enters the dry filter box from the safety steam pipeline to cool the filter chamber and block oxygen. When the temperature detector detects a sharp rise in exhaust gas temperature, fire water enters the dry filter box from the fire sprinkler pipeline to rapidly cool the open flame. Combined with the steam entering simultaneously, this effectively blocks and extinguishes the open flame between equipment. This excellent cooling and rapid isolation function minimizes the impact of accidents and effectively ensures the high safety operation of waste-generating equipment.

[0016] During assembly, the pull-out filter screen is inserted from the top of the dry filter box into the slide assembly of the filter chamber. After all the pull-out filter screens are assembled, the clamping frame is locked by the quick-release buckle of the clamping device, thereby clamping and fixing the pull-out filter screens.

[0017] This filtration device employs a horizontally positioned filter screen, meaning the screen is pulled out parallel to the direction of exhaust gas movement. This solves the problem of insufficient contact area between the exhaust gas and the filter screen, resulting in a geometrically increasing exhaust gas flow area. This directly reduces the contact gap between the exhaust gas and the screen, achieving high-precision solid-waste separation. During the long-stroke contact process, the exhaust gas undergoes continuous contact and diversion, achieving low-resistance passage and effectively reducing energy waste.

[0018] The direction of solid waste gas movement aligns with the filter screen, significantly reducing the chance of filter screen adhesion. As the waste gas moves from the inlet to the outlet along the ventilation channel, it continuously leaks from the filters on both sides. However, solid waste materials such as lint still possess high kinetic energy to overcome the adhesive force of the waste gas leaking from the filter screen holes, moving along the filter screen surface and eventually accumulating in the lint temporary accumulation area at the bottom of the dry filter box, thus improving the filter screen's filtration accuracy. Due to the air velocity, while reducing the accumulation of lint on the filter screen surface, it also partially carries away solid dust and lint adhering to the filter screen surface, effectively reducing lint adhesion and playing a self-cleaning role.

[0019] A waste lint storage area is set up at the bottom of the dry filter box, which effectively reduces the chance of waste lint passing through the filter screen, reduces the pressure of subsequent processing and the cleanliness of the working chamber, effectively reduces the number of cleaning operations, and improves the solid waste standardization and recycling rate.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] The filter configuration of this invention increases the airflow area, reduces working air resistance, improves ventilation performance, reduces contamination, and reduces maintenance workload.

[0022] The filter setting technology included in this invention effectively increases the airflow area and self-cleaning ability, reduces working wind resistance by more than 30%, achieves energy savings of more than 35% in the process section, and extends the filter cleaning cycle by more than 3 times.

[0023] This invention achieves high-precision filtration with low air resistance through novel filtration technology, reducing energy consumption and the difficulty of subsequent treatment. By separating and retaining pollutants in the exhaust gas according to their physical state, it reduces the difficulty of reprocessing pollutants. Through classified separation, it improves the resource reuse rate of pollutants and reduces secondary pollution. Through graded protection technology, low-risk alarm linkage uses uninterrupted steam cooling and isolation to prevent fires. High-risk alarm linkage uses simultaneous rapid cooling and isolation with steam and water for isolation and protection, achieving a highly reliable function to prevent the spread of accidents. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of existing technology for filtering.

[0025] Figure 2 This is a schematic diagram of the main structure of the present invention;

[0026] Figure 3 for Figure 2 A schematic diagram of the left-side view structure;

[0027] Figure 4 for Figure 2 A top-view structural diagram;

[0028] Figure 5This is a schematic diagram of the filtration process of the present invention;

[0029] Figure 6 A schematic diagram of the structure of a sliding rail assembly. Detailed Implementation

[0030] 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.

[0031] Please see Figure 2-6 This embodiment provides a technical solution: a high-efficiency, low-wind-resistance dry filtration device, including a horizontally placed dry filter box 3, with both ends of the dry filter box 3 open, one end open as an air inlet and the other end open as an air outlet, and a filter chamber provided inside the dry filter box 3.

[0032] The dry filter box 3 has a rectangular main body, and the filter chamber is the inner cavity of the main body. An air inlet channel 12 and an air outlet channel 13 are respectively provided at both ends of the main body. The air inlet channel 12 and the air outlet channel 13 are sealed to the main body. The air inlet is located on the end face of the air inlet channel 12, and the air outlet is located on the end face of the air outlet channel 13. Both the air inlet channel 12 and the air outlet channel 13 gradually decrease in size from their connection end to their end faces. External connecting flanges are provided on the end faces of the air inlet channel 12 and the air outlet channel 13. Cleaning windows are provided on the lower parts of both sides of the main body, and cleaning doors 5 are provided at the cleaning windows. The cleaning doors 5 are sealed and fixed to the main body with screws. Regular thorough cleaning of the main body can be achieved through the cleaning windows. The bottom of the dry filter box 3 is set as a waste lint storage area, and waste lint is removed through the cleaning windows.

[0033] Several parallel and parallel pull-out filter screens 4 are arranged side-by-side in the filtration chamber. Each pull-out filter screen 4 is inserted into the filtration chamber from top to bottom along the length of the chamber, so that the pull-out filter screen 4 is in the same direction as the exhaust gas movement. This solves the problem of insufficient contact area between the exhaust gas and the filter screen, and the exhaust gas passage area increases geometrically, directly reducing the contact gap of the exhaust gas movement and achieving high-precision solid-waste separation. During the long-stroke contact process, the exhaust gas is continuously diverted through contact, achieving low-resistance passage and effectively reducing power and energy waste. A clamping device 1 is provided on the dry filter box 3 to fix several pull-out filter screens 4.

[0034] Two pull-out filters 4 form a group. The inner ends of the two pull-out filters 4 in a group are connected by a slide assembly 11, and the outer ends are open and set directly opposite the air inlet. The two pull-out filters 4 in a group form a pre-filter air passage 9. The outer ends of the pull-out filters 4 in adjacent groups are connected by a slide assembly 11. The pull-out filters 4 in adjacent groups and the two outermost pull-out filters 4 and the dry filter box 3 wall form a post-filter ventilation passage 10. During the process of the exhaust gas moving from the air inlet to the air outlet, the exhaust gas enters any group of pre-filter air passages 9 in the filter chamber, moves along the surface of the pull-out filters 4 on both sides, is filtered, and then enters the post-filter ventilation passage 10 and exits from the air outlet.

[0035] Several parallel pull-out filter screens 4 are vertically inserted into the filtration chamber. The pull-out filter screens 4 are parallel to the air inlet direction or at a 20° angle to it. The pull-out filter screens 4 are independent components, removable and replaceable. Their pore size density and material are selected to match the composition of the exhaust gas to be treated. Using a specific angle further enhances filtration and self-cleaning effects.

[0036] The slide rail assembly 11 includes vertically arranged slide rail support plates alternately near the air inlet or air outlet. One or both ends of the slide rail support plate are provided with slide grooves 14 that cooperate with the pull-out filter screen 4. The outer ends of two pull-out filter screens 4 in adjacent groups are located in two slide grooves 14 at the air inlet, and the inner ends of two pull-out filter screens 4 in the same group are located in two slide grooves 14 at the air outlet.

[0037] Each pull-out filter 4 is equipped with a filter frame containing a porous filter screen. An end-positioning bracket is located at the upper end of the filter frame. During assembly, the end-positioning bracket can be grasped for installation. After installation, the end-positioning bracket is positioned outside the dry filter box. The clamping device 1 includes a clamping frame that cooperates with the end-positioning bracket. Both ends of the clamping frame are equipped with several hooks, and the outer wall of the dry filter box 3 is equipped with quick-release buckles that cooperate with the hooks.

[0038] A fire sprinkler pipe 6 is installed inside the air inlet side of the dry filter box 3. The fire sprinkler pipe 6 has at least three sets of branch pipes running from top to bottom, each set of branch pipes equipped with several nozzles 15, each nozzle 15 facing the pre-filter air passage 9. A safety steam pipe 7 and a sewage discharge pipe 8 are installed under the bottom plate of the dry filter box 3. Temperature detectors 2 are installed in the air inlet passage 12 and the air outlet passage 13. When the temperature detector 2 detects an abnormal exhaust gas temperature, it sends a signal, and steam enters the dry filter box 3 from the safety steam pipe 7 to cool the filter chamber and block oxygen. When the temperature detector 2 detects a sharp rise in exhaust gas temperature, fire water enters the dry filter box 3 from the fire sprinkler pipe 6 to rapidly cool open flames. Combined with the simultaneously entering steam, this effectively blocks and extinguishes larger open flames. This excellent cooling and rapid isolation function minimizes the impact of accidents and effectively ensures the high safety operation of the waste-generating equipment.

[0039] During assembly, the pull-out filter screen 4 is inserted from the top of the dry filter box 3 into the slide assembly 11 of the filter chamber. After all the pull-out filter screens 4 are assembled, the quick-release buckle of the pressing device 1 is used to lock the pressing frame, thereby pressing and fixing the pull-out filter screen 4.

[0040] During operation, as the exhaust gas moves from the inlet to the outlet, it enters any set of pre-filter air passages 9 in the filter chamber, moves along the surface of the pull-out filter screens 4 on both sides, and after filtration, enters the post-filter ventilation passage 10 and exits from the outlet. This filtration method increases the air passage area, reduces working air resistance, improves ventilation performance, reduces contamination, and reduces maintenance workload.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency, low-wind-resistance dry filtration device, characterized in that: The dry filter box is placed horizontally and has open ends. One open end is used as an air inlet and the other open end is used as an air outlet. The dry filter box has a filter chamber, in which several pull-out filter screens are arranged side by side and parallel to each other. Each pull-out filter screen is inserted into the filter chamber from top to bottom along the length of the filter chamber. The dry filter box is provided with a clamping device to fix several pull-out filter screens. Two pull-out filters form a group. The inner ends of the two pull-out filters in a group are connected by a slide rail assembly, and the outer ends are open and positioned directly opposite the air inlet. The two pull-out filters in a group form a pre-filter air passage. The outer ends of the pull-out filters in adjacent groups are connected by a slide rail assembly. The pull-out filters in adjacent groups and the two outermost pull-out filters and the dry filter box wall form post-filter ventilation channels. As the exhaust gas moves from the air inlet to the air outlet, it enters any group of pre-filter air passages in the filter chamber, moves along the surface of the pull-out filters on both sides, is filtered, and then enters the post-filter ventilation channel and exits from the air outlet. Several parallel pull-out filters are vertically inserted into the filter chamber. The pull-out filters are parallel to the air inlet direction or at a certain angle to the air inlet direction, with an angle of 10°-30°. The slide assembly includes vertically arranged slide support plates alternately near the air inlet or air outlet. One or both ends of the slide support plate are provided with slide grooves that cooperate with the pull-out filters. The outer ends of two pull-out filters in adjacent groups are located in the two slide grooves of one slide assembly at the air inlet, and the inner ends of two pull-out filters in the same group are located in the two slide grooves of one slide assembly at the air outlet. Each pull-out filter is provided with a filter frame, and a porous filter is provided in the filter frame. An end limiting bracket is provided at the upper end of the filter frame. The pressing device includes a pressing bracket that cooperates with the end limiting bracket. Both ends of the pressing bracket are provided with several hooks, and the outer wall of the dry filter box is provided with quick-release buckles that cooperate with the hooks.

2. The high-efficiency, low-resistance dry filtration device according to claim 1, characterized in that: The dry filter box has a main box body with a rectangular cross-section. The filter chamber is the inner cavity of the main box body. An air inlet channel and an air outlet channel are respectively provided at both ends of the main box body. The air inlet channel and the air outlet channel are sealed to the main box body. The air inlet is located on the end face of the air inlet channel, and the air outlet is located on the end face of the air outlet channel. The air inlet channel and the air outlet channel are both set to gradually narrow from the end connected to the main box body towards their end faces. An external connecting flange is provided on the end face of the air inlet channel and the air outlet channel.

3. The high-efficiency, low-wind-resistance dry filtration device according to claim 2, characterized in that: Cleaning windows are provided on the lower sides of the main body, and cleaning doors are provided at the cleaning windows. The cleaning doors are sealed and fixed to the main body with screws.

4. The high-efficiency, low-wind-resistance dry filtration device according to claim 2, characterized in that: A fire sprinkler pipeline is installed inside the air inlet side of the dry filter box. The fire sprinkler pipeline has at least three sets of branch pipes from top to bottom. Each set of branch pipes is equipped with several nozzles, and each nozzle is set directly opposite the pre-filter air passage.

5. The high-efficiency, low-resistance dry filtration device according to claim 4, characterized in that: Safety steam pipelines and sewage discharge pipelines are installed under the bottom plate of the dry filter box. Temperature detectors are installed in the air inlet and outlet channels. When the temperature detectors detect abnormal exhaust gas temperature, they send a signal, and steam enters the dry filter box from the safety steam pipeline to cool the filter chamber and block oxygen. When the temperature detectors detect a sharp rise in exhaust gas temperature, fire water enters the dry filter box from the fire sprinkler pipeline to rapidly cool the open flame. Combined with the steam entering at the same time, the open flame is blocked and extinguished between the equipment.

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