A nonwoven fabric production plant dust removal device capable of adjusting the filtering area in stages

Abstract

The application discloses a non-woven fabric production workshop dust falling device capable of grading regulating a filtering area, which comprises a dust removal main box body, an assembly space is formed in the dust removal main box body, a spraying filtering area, a cloth filtering area and an activated carbon filtering area are sequentially arranged in the assembly space along an airflow direction, a front pre-filtering box body is communicated with the front side of the assembly space through an air inlet dust collection port, the front pre-filtering box body sucks workshop dust through a workshop dust suction pipe network and a distributed dust suction port, and a powerful negative pressure fan is installed on the rear side of the assembly space through a purification air outlet to drive airflow circulation. The spraying filtering area realizes primary dust removal through water circulation spraying and a corrugated flow guide and precipitation structure, the cloth filtering area realizes secondary filtration through high-efficiency filter cloths which can be quickly replaced, the activated carbon filtering area realizes three-stage precision filtration through adjustable front and rear activated carbon filter plate combinations, and all components are modularly designed to facilitate maintenance. The non-woven fabric production workshop dust falling device is suitable for different dust concentration conditions, has high filtering efficiency and can effectively reduce workshop dust pollution.

Description

Technical Field

[0001] This utility model relates to the field of dust control technology in production workshops, specifically to a dust control device for non-woven fabric production workshops with adjustable filtration area. Background Technology

[0002] During the production of nonwoven fabrics, processes such as fiber cutting, carding, and web forming generate a large amount of dust. This dust not only affects the air quality in the workshop, but may also be inhaled by operators, leading to respiratory diseases. At the same time, dust adhering to the surface of equipment can affect production precision and product quality.

[0003] The existing dust suppression devices in workshops have the following shortcomings:

[0004] 1. The filtration layers are simple, and a single filtration method is often used (such as activated carbon filtration or spraying only), which makes it difficult to efficiently remove dust of different particle sizes (such as large fiber debris and fine dust).

[0005] 2. The filter components are inconvenient to replace. For example, filter cloth and activated carbon plates require the disassembly of a large number of structures to replace, resulting in low maintenance efficiency.

[0006] 3. Poor adaptability; unable to adjust the filter area or intensity according to the real-time dust concentration in the workshop; prone to clogging when there is a high concentration of dust; and wasteful of energy when there is a low concentration. Utility Model Content

[0007] In response to the aforementioned technical problems, this application solves the problems of single filtration level, inconvenient replacement of filter components, and poor adaptability in the prior art.

[0008] To achieve the above objectives, the technical solution adopted in this application is as follows: a dust removal device for a non-woven fabric production workshop with adjustable filtration area, comprising a main dust removal box (101), wherein an assembly space is formed inside the main dust removal box (101), an air inlet (102) is provided on the front side of the assembly space and a purification outlet (103) is provided on the rear side, the front end of the air inlet (102) is connected to a pre-filter box (126), and a replacement window and a quick-release replacement door are provided on the front end face of the pre-filter box (126). (127) The pre-filter box (126) is equipped with a primary activated carbon filter plate (128). The top of the pre-filter box (126) is connected to multiple workshop dust collection pipes (129). The workshop dust collection pipes (129) are laid on the top of the non-woven fabric production workshop and are equipped with multiple distributed dust collection ports (130). A powerful negative pressure fan (104) is installed in the purification air outlet (103). The assembly space is arranged in sequence along the airflow direction, including a spray filtration area, a cloth filtration area, and an activated carbon filtration area.

[0009] To better realize this utility model, the spray filtration area further includes a circulating water tank (105), an atomizing spray pipe assembly (106), a pull-out dust collection tank (107), and a corrugated guide sedimentation plate (108). The main dust collector (101) is located above the spray filtration area and the circulating water tank (105) is provided. The circulating water tank (105) extends into the spray filtration area through the atomizing spray pipe assembly (106), and a high-density atomizing nozzle (125) is provided at the end of the atomizing spray pipe assembly (106). The dust collection box (101) has a collection port on its front side below the air inlet dust collection port (102). The pull-out dust collection tank (107) is located on the inner bottom surface of the spray filtration area and its front side extends out of the collection port and is equipped with a quick-release handle (110). The lower middle part of the pull-out dust collection tank (107) is provided with a corrugated flow guide sedimentation plate (108). The left and right sides of the corrugated flow guide sedimentation plate (108) form a vertical guide structure with dovetail grooves and dovetail protrusions respectively between the pull-out dust collection tank (107).

[0010] To better realize this utility model, the upper surface of the corrugated flow guide sedimentation plate (108) is provided with corrugations that spread linearly along the left and right sides of the removable dust collection tank (107) and are inclined towards the collection port. The lower surface of the corrugated flow guide sedimentation plate (108) is parallel to the inner bottom surface of the removable dust collection tank (107). An elastic buffer support (122) is provided between the bottom of the corrugated flow guide sedimentation plate (108) and the inner wall surface of the removable dust collection tank (107). The upper surface of the corrugated flow guide sedimentation plate (108) is provided with sedimentation filter holes, and a dust particle settling area (109) is formed between its lower surface and the inner bottom surface of the removable dust collection tank (107). The sedimentation filter holes are connected to the dust particle settling area (109).

[0011] To better realize this utility model, the cloth filtration area further includes a high-efficiency dust filter cloth (111), and the dust removal main box (101) has a first through-hole on the surface above the cloth filtration area. The high-efficiency dust filter cloth (111) passes through the first through-hole and extends into the cloth filtration area. The inner bottom surface of the cloth filtration area is provided with an upwardly protruding support seat, and the top of the support seat is snapped into connection with the bottom of the high-efficiency dust filter cloth (111).

[0012] To better realize this utility model, the activated carbon filtration area further includes a modular maintenance cover (112), a pre-activated carbon filter plate (113), a post-activated carbon fine filter plate (116), and a baffle (117). The dust collector main housing (101) has a second through-hole on its surface above the activated carbon filtration area. The modular maintenance cover (112) is detachably connected to the second through-hole. An activated carbon plate support bracket (114) and a baffle sliding guide bracket (120) are sequentially arranged on the lower surface of the modular maintenance cover (112) along the airflow direction. An activated carbon plate guide bracket (114) and a baffle sliding guide bracket (120) are formed between the activated carbon plate support bracket (114) and the baffle sliding guide bracket (120). The modular maintenance cover (112) is located above the activated carbon plate support bracket (114) with a third through-hole and above the baffle sliding guide frame (120) with a fourth through-hole. The activated carbon plate support bracket (114) is detachably connected to a front activated carbon filter plate (113) and the front activated carbon filter plate (113) extends upward out of the third through-hole. The baffle (117) slides through the fourth through-hole and the baffle sliding guide frame (120) is placed in the lower middle section of the activated carbon filtration area. Its top is slidably sleeved on the bottom of the baffle sliding guide frame (120) and its bottom is engaged with the inner bottom surface of the activated carbon filtration area.

[0013] To better realize this utility model, the modular maintenance cover (112) is further provided with an electric lifting adjustment rod (115) on the upper surface between the third through port and the fourth through port. The electric lifting adjustment rod (115) extends through the modular maintenance cover (112) into the activated carbon filtration area and is provided with a post-activated carbon fine filter plate (116) at its bottom. The post-activated carbon fine filter plate (116) is slidably connected to the activated carbon plate guide rail (121) and can extend downward to the inner bottom surface of the activated carbon filtration area for engagement.

[0014] To better realize this utility model, the modular maintenance cover (112) further includes a left maintenance channel (123) that extends horizontally to the right through the third through-hole on the left side wall. A left sealing opening and closing plate (118) is slidably connected inside the left maintenance channel (123), and the bottom surface of the left sealing opening and closing plate (118) is detachably connected to the inner bottom surface of the left maintenance channel (123). The modular maintenance cover (112) also includes a right maintenance channel (124) that extends horizontally to the left through the fourth through-hole on the right side wall. A right sealing opening and closing plate (119) is slidably connected inside the right maintenance channel (124), and the bottom surface of the right sealing opening and closing plate (119) is detachably connected to the inner bottom surface of the right maintenance channel (124).

[0015] The technical solution provided by this utility model has the following advantages compared with the prior art:

[0016] 1. This utility model, through a four-stage filtration design consisting of a pre-filter box (primary activated carbon filtration), spray filtration (primary dust removal), cloth filtration (secondary filtration), and activated carbon filtration (tertiary fine filtration), can sequentially remove large particles of dust, fiber debris, fine dust, and odors, significantly improving filtration efficiency and adapting to the complex dust composition in non-woven fabric workshops.

[0017] 2. In this utility model, the activated carbon filtration area is controlled by an electric lifting adjustment rod to open / close the rear activated carbon fine filter plate. With the adjustment of the baffle position, the "pre-filter" or "front and rear dual filter" modes can be flexibly switched according to the dust concentration. The filtration area is increased when the concentration is high and the energy consumption is reduced when the concentration is low, making it more adaptable.

[0018] 3. In this utility model, each core component adopts a quick-release structure: the pre-filter box can replace the primary activated carbon filter plate through a quick-release replacement door; the pull-out dust collection tank can be pulled out for cleaning through a quick-release handle; the high-efficiency filter cloth can be quickly replaced through a snap-fit ​​structure; the modular maintenance cover and left / right sealing opening and closing plates facilitate the maintenance of the activated carbon plate and greatly shorten the maintenance time.

[0019] 4. In this utility model, the spray filtration area achieves water resource recycling through a circulating water tank, a pull-out dust collection pool, and a corrugated guide sedimentation plate: after the spray water is filtered by the corrugated surface sedimentation, the clean water can be recycled back to the water tank for reuse. Only the dust in the dust particle settling area needs to be cleaned periodically, reducing water resource waste.

[0020] 5. In this utility model, the workshop dust collection pipe network covers the top of the workshop through distributed dust collection ports, and forms a negative pressure airflow with the help of a powerful negative pressure fan, which can comprehensively suck up dust from all areas of the workshop, avoid local dust accumulation, and improve the overall dust reduction effect. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 for Figure 1 A sectional view;

[0024] Figure 3 for Figure 2The front view;

[0025] Figure 4 for Figure 2 Enlarged view of point A in the middle.

[0026] In the diagram: 101-Main dust collector housing; 102-Air inlet / dust collection port; 103-Purified air outlet; 104-Powerful negative pressure fan; 105-Circulating water tank; 106-Atomizing spray pipe assembly; 107-Pull-out dust collection tank; 108-Corrugated flow guide sedimentation plate; 109-Dust particle settling area; 110-Quick disassembly handle; 111-High-efficiency filter cloth; 112-Modular maintenance cover; 113-Pre-activated carbon filter plate; 114-Activated carbon plate support bracket; 115-Electric lifting adjustment rod; 11 6-Post-activated carbon fine filter plate; 117-Baffle; 118-Left side sealing and opening / closing plate; 119-Right side sealing and opening / closing plate; 120-Baffle sliding guide frame; 121-Activated carbon plate guide rail; 122-Elastic buffer support; 123-Left side maintenance passage; 124-Right side maintenance passage; 125-High-density atomizing nozzle; 126-Pre-filter housing; 127-Quick-release replacement door; 128-Primary activated carbon filter plate; 129-Workshop dust collection network; 130-Distributed dust collection port. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this application, it should be noted that the use of terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product is in use. These terms are used solely for the convenience of describing this application and for simplifying the description, 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 application. Furthermore, the use of terms such as "first" and "second" in the description of this application is only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] Furthermore, the use of terms such as "horizontal" and "vertical" in the description of this application does not imply that the component is required to be absolutely horizontal or suspended, but rather that it may be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but rather that it may be slightly tilted.

[0032] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] Example 1: Basic configuration of dust suppression device

[0034] This embodiment provides a dust suppression device suitable for small and medium-sized nonwoven fabric production workshops, with the following specific structure:

[0035] Dust collector main body 101: Made of 3mm thick steel plate welded together, length × width × height = 2000mm × 1200mm × 1500mm. The internal assembly space is divided into spray filtration area (600mm long), cloth filtration area (500mm long) and activated carbon filtration area (900mm long) from front to back.

[0036] Pre-filter housing 126: It is connected to the main dust collector housing 101 by a flange. Two primary activated carbon filter plates 128 (400mm×300mm×50mm) are vertically installed inside. The quick-release replacement door 127 adopts a hinge + buckle structure and has an opening angle ≥120°.

[0037] Workshop dust collection pipe network 129: Φ110mm PVC pipe is used, which is laid along the top beam of the workshop. One distributed dust collection port (130) (Φ50mm) is set every 5 meters. Stainless steel dustproof nets are installed at the ports.

[0038] Spray filtration area:

[0039] The circulating water tank 105 has a capacity of 500L and is equipped with a liquid level sensor. Water replenishment is controlled by a solenoid valve.

[0040] The atomizing spray pipe assembly 106 uses a Φ32mm galvanized pipe, with 12 high-density atomizing nozzles 125 (orifice diameter 0.8mm) installed at the end.

[0041] The pull-out dust collection tank 107 is made of 304 stainless steel and has a capacity of 300L. The quick-release handle 110 has a folding structure.

[0042] The corrugated flow guide sedimentation plate 108 is 5mm thick, with a corrugation height of 30mm and an inclination angle of 5°. The elastic buffer support 122 uses Φ10mm springs with a spacing of 200mm.

[0043] Cloth filtration area: The high-efficiency dust filter cloth 111 is made of nylon material with a filtration accuracy of 10μm. The support base is an Ω-shaped groove made of ABS plastic.

[0044] Activated carbon filtration area:

[0045] The modular maintenance cover 112 is made of aluminum alloy and is connected to the box body by four wing bolts.

[0046] The pre-activated carbon filter plate 113 has dimensions of 400mm×300mm×50mm, and the post-activated carbon fine filter plate 116 has the same dimensions.

[0047] The electric lifting and adjusting rod 115 has a stroke of 300mm, a thrust of 500N, and is driven by 24V DC.

[0048] The left / right sealing opening and closing plates (118 / 119) use rubber sealing strips with a sliding resistance of ≤50N.

[0049] Example 2: Enhanced dust suppression device (suitable for high-dust workshops)

[0050] Based on Example 1, the following configuration is added:

[0051] A primary activated carbon filter plate 128 is added inside the pre-filter housing 126 to form a double-layer filter.

[0052] The diameter of the workshop dust collection pipe network 129 has been increased to Φ160mm, and the number of distributed dust collection ports 130 has increased by 50%.

[0053] The atomizing spray pipe assembly 106 has been upgraded to a dual-path system, and the number of high-density atomizing nozzles 125 has increased to 24.

[0054] The activated carbon filtration area is expanded to 1200mm, and the dimensions of the pre-activated carbon filter plate 113 and the post-activated carbon fine filter plate 116 are both increased to 500mm×400mm×50mm.

[0055] The electric lifting adjustment rod 115 has been upgraded to a dual-rod synchronous drive, and a position sensor has been added to achieve precise positioning.

[0056] Example 3: Intelligent Control Dust Suppression Device

[0057] An intelligent control system is added based on Example 2:

[0058] A dust concentration sensor (detection range 0-10 mg / m³) was installed at the air outlet 103. 3 )

[0059] The electric lifting adjustment rod 115 and the left / right sealing opening and closing plates (118 / 119) are both equipped with servo motor drives.

[0060] A PLC control cabinet can be added to automatically switch the filtration mode according to the dust concentration.

[0061] Concentration <2mg / m 3 At this time, only the pre-activated carbon filter plate 113 is activated;

[0062] 2mg / m 3 ≤concentration<5mg / m 3 When needed, activate the pre-filter + post-filter activated carbon filter;

[0063] Concentration ≥5mg / m 3 When the time comes, the spray system will automatically start and the dual activated carbon plate filter will be activated.

[0064] A remote control module can be added, allowing users to view the operating status and control the start and stop of the equipment via a mobile app.

[0065] In the above embodiments, the clearance between all moving parts is controlled within the range of 0.5-1mm, all sliding parts are coated with silicone-based grease, and the electrical components have an IP54 protection rating, making them suitable for humid workshop environments. During actual installation, the overall height of the device from the ground is 1.2m, and the distance from the wall is ≥500mm, facilitating maintenance and operation.

[0066] This device uses negative pressure to drive airflow circulation, combined with four-stage filtration to reduce dust in the workshop. The specific workflow is as follows:

[0067] Overall airflow drive

[0068] When the powerful negative pressure fan 104 is started, the dust-laden air in the workshop enters the workshop dust collection network 129 through the distributed dust collection port 130 under the action of negative pressure, and is collected in the pre-filter box 126. After some large particles of dust are removed by the primary activated carbon filter plate 128, the air enters the assembly space of the dust collection main box 101 through the air inlet dust collection port 102. After passing through the three-stage filtration area, the clean air is discharged from the purification outlet 103, completing the circulation.

[0069] Primary filtration: Spray filtration area

[0070] Water in the circulating water tank 105 is transported to the high-density atomizing nozzle 125 through the atomizing spray pipe assembly 106, forming a water mist spray that enters the assembly space. Dust and water mist combine to form dust-laden droplets, which fall to the corrugated guide sedimentation plate 108 under gravity.

[0071] The corrugations on the upper surface of the corrugated guide sedimentation plate 108 are linearly distributed along both sides of the pull-out dust collection tank 107 and inclined towards the collection port. With the vibration of the elastic buffer support 122 (a spring installed according to actual needs) (when dust-laden droplets are on the upper surface of the corrugated guide sedimentation plate 108, the corrugated guide sedimentation plate 108 is vibrated under the action of the gravity of the dust-laden droplets), the dust-laden droplets gather in the corrugated depressions. After passing through the sedimentation and filtration holes, the droplets (without dust) fall into the dust particle settling area 109 below, realizing the separation of dust and water.

[0072] The separated clear water remains below the corrugated guide sedimentation plate 108 and can be recycled back to the circulating water tank 105 for reuse; the deposited dust is pulled out and cleaned with the pull-out dust collection tank 107 through the quick-release handle 110 (regular cleaning to avoid clogging of sedimentation filter holes).

[0073] Secondary filtration: Cloth filter area

[0074] Cleaning windows and doors can be installed on the side walls of this area.

[0075] After being spray-filtered, the airflow enters the cloth filtration area, where fine dust is further intercepted by the high-efficiency dust filter cloth 111. The high-efficiency dust filter cloth 111 is fixed by a snap-fit ​​structure between its bottom and the support base. When the filter cloth is clogged or dirty, it can be directly pulled out from the first through-hole for replacement or cleaning, making the operation convenient (a cleaning window and a door can be opened on the side wall of this area).

[0076] Three-stage filtration: Activated carbon filtration zone

[0077] Cleaning windows and doors can be installed on the side walls of this area.

[0078] The filtration mode can be flexibly adjusted according to the dust concentration in the workshop, as follows:

[0079] High Concentration Mode: When the dust concentration is high, pre- and post-activated carbon filtration must be activated. During operation, the electric lifting adjustment lever 115 is activated, and the post-activated carbon fine filter plate 116 moves upward, so that the post-activated carbon fine filter plate 116 overlaps with the pre-activated carbon filter plate 113. At this time, the pre-activated carbon filter plate 113 and the post-activated carbon fine filter plate 116 participate in filtration together, increasing the filtration area and filtration capacity through overlapping.

[0080] Low concentration mode: When the dust concentration is low, only the pre-activated carbon filter is activated. During operation, the post-activated carbon fine filter plate 116 is overlapped with the baffle 117, and only the pre-activated carbon filter plate 113 is active, reducing energy consumption. When removing the pre-activated carbon filter plate 113 and the baffle 117, the left sealing opening and closing plate 118 and the right sealing opening and closing plate 119 are pulled out from the left maintenance channel 123 and the right maintenance channel 124, respectively, so that the pre-activated carbon filter plate 113 and the baffle 117 can be removed (the pre-activated carbon filter plate 113 can be pulled out by holding the handle; when removing the baffle 117, an existing pull rod needs to be prepared in advance. The bottom of the pull rod has a hook. After pulling the hook to the pull hole at the top of the baffle 117, it is pulled up and removed).

[0081] Through the above-mentioned multi-stage filtration and flexible adjustment, the device can be efficiently adapted to the dust conditions in non-woven fabric production workshops. The number of units of this device can be assembled according to the actual dust conditions, and the assembly method and position can be adjusted according to the actual situation to achieve stable dust reduction.

[0082] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A nonwoven fabric production plant dust falling device capable of stepwise adjusting a filter area, characterized by: The system includes a main dust collector housing (101), which forms an assembly space. An air inlet (102) is located at the front of the assembly space, and a purified air outlet (103) is located at the rear. The front end of the air inlet (102) is connected to a pre-filter housing (126). A replacement window and a quick-release replacement door (127) are installed on the front face of the pre-filter housing (126). The pre-filter housing (126) contains... The primary activated carbon filter plate (128) is connected to the top of the pre-filter box (126) with multiple workshop dust collection pipes (129). The workshop dust collection pipes (129) are laid on the top of the non-woven fabric production workshop and have multiple distributed dust collection ports (130) on them. A powerful negative pressure fan (104) is installed in the purification air outlet (103). The assembly space is arranged in sequence along the airflow direction, including a spray filtration area, a cloth filtration area and an activated carbon filtration area.

2. The dust falling device for nonwoven fabric production plant capable of adjusting the filtration area hierarchically according to claim 1, wherein: The spray filtration area includes a circulating water tank (105), an atomizing spray pipe assembly (106), a pull-out dust collection tank (107), and a corrugated guide sedimentation plate (108). The main dust collector housing (101) is located above the spray filtration area and has the circulating water tank (105) installed above it. The circulating water tank (105) extends into the spray filtration area through the atomizing spray pipe assembly (106), and high-density atomizing nozzles (125) are installed at the ends of the atomizing spray pipe assembly (106). The main dust collector housing (101) A collection port is provided on the front side below the air inlet dust collection port (102). The pull-out dust collection tank (107) is located on the inner bottom surface of the spray filtration area and the collection port extends from its front side and is provided with a quick-release handle (110). A corrugated flow guide sedimentation plate (108) is provided in the middle and lower part of the pull-out dust collection tank (107). The left and right sides of the corrugated flow guide sedimentation plate (108) form a vertical guide structure with dovetail grooves and dovetail protrusions respectively between the pull-out dust collection tank (107).

3. The dust fall device for nonwoven fabric production plant capable of adjusting the filtration area stepwise according to claim 2, characterized in that: The upper surface of the corrugated flow guide sedimentation plate (108) is provided with corrugations that spread linearly along the left and right sides of the removable dust collection tank (107) and are inclined toward the collection port. The lower surface of the corrugated flow guide sedimentation plate (108) is parallel to the inner bottom surface of the removable dust collection tank (107). An elastic buffer support (122) is provided between the bottom of the corrugated flow guide sedimentation plate (108) and the inner wall surface of the removable dust collection tank (107). The upper surface of the corrugated flow guide sedimentation plate (108) is provided with sedimentation and filtration holes, and a dust particle settling zone (109) is formed between its lower surface and the inner bottom surface of the removable dust collection tank (107). The sedimentation and filtration holes are connected to the dust particle settling zone (109).

4. The dust fall device for nonwoven fabric production plant capable of adjusting the filtration area stepwise according to claim 1, wherein: The cloth filtration area includes a high-efficiency dust filter cloth (111). The dust removal main box (101) has a first through-hole on its surface above the cloth filtration area. The high-efficiency dust filter cloth (111) passes through the first through-hole and extends into the cloth filtration area. The inner bottom surface of the cloth filtration area is provided with an upwardly protruding support seat. The top of the support seat is snapped into connection with the bottom of the high-efficiency dust filter cloth (111).

5. The dust fall device for nonwoven fabric production plant capable of adjusting the filtration area stepwise according to claim 1, wherein: The activated carbon filtration area includes a modular maintenance cover (112), a pre-activated carbon filter plate (113), a post-activated carbon fine filter plate (116), and a baffle (117). A second through-hole is opened on the surface of the main dust collector housing (101) above the activated carbon filtration area. The modular maintenance cover (112) is detachably connected to the second through-hole. An activated carbon plate support bracket (114) and a baffle sliding guide bracket (120) are sequentially arranged on the lower surface of the modular maintenance cover (112) along the airflow direction. An activated carbon plate guide rail (121) is formed between the activated carbon plate support bracket (114) and the baffle sliding guide bracket (120). A modular maintenance cover (112) has a third through-hole above the activated carbon plate support bracket (114) and a fourth through-hole above the baffle sliding guide frame (120). A front activated carbon filter plate (113) is detachably connected to the activated carbon plate support bracket (114), and the front activated carbon filter plate (113) extends upward out of the third through-hole. The baffle (117) slides through the fourth through-hole and the baffle sliding guide frame (120) is placed in the lower middle section of the activated carbon filtration area, and its top is slidably sleeved on the bottom of the baffle sliding guide frame (120), and its bottom is engaged with the inner bottom surface of the activated carbon filtration area.

6. The dust fall device for nonwoven fabric production plant capable of adjusting the filtration area stepwise according to claim 5, wherein: The modular maintenance cover (112) is provided with an electric lifting adjustment rod (115) on its upper surface between the third through-hole and the fourth through-hole. The electric lifting adjustment rod (115) extends through the modular maintenance cover (112) into the activated carbon filtration area and is provided with a post-activated carbon fine filter plate (116) at its bottom. The post-activated carbon fine filter plate (116) is slidably connected to the activated carbon plate guide rail (121) and can extend downward to the inner bottom surface of the activated carbon filtration area for engagement.

7. The dust fall device for nonwoven fabric production plant capable of adjusting the filtration area stepwise according to claim 6, wherein: The left side wall of the modular maintenance cover (112) has a left maintenance channel (123) that extends horizontally to the right through the third through-hole. A left sealing opening and closing plate (118) is slidably connected inside the left maintenance channel (123), and the bottom surface of the left sealing opening and closing plate (118) is detachably connected to the inner bottom surface of the left maintenance channel (123). The right side wall of the modular maintenance cover (112) has a right maintenance channel (124) that extends horizontally to the left through the fourth through-hole. A right sealing opening and closing plate (119) is slidably connected inside the right maintenance channel (124), and the bottom surface of the right sealing opening and closing plate (119) is detachably connected to the inner bottom surface of the right maintenance channel (124).

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