Negative pressure type dust removal device for poultry feed production

Abstract

The invention relates to the technical field of feed processing, in particular to a negative pressure type dust removal device for poultry feed production, which comprises an air bellow, and further comprises a filter assembly, a dust removal device, a dust removal device, a dust removal device and a dust removal device, and the filter assembly is rotatably arranged in the air bellow and is used for filtering dust-containing air flow; the driving assembly is arranged on the air bellow and used for driving the filtering assembly to rotate intermittently; and the ash removal assembly is arranged on the air bellow and used for carrying out high-voltage pulse ash removal on the filtering assembly rotating to the specific position. Dynamic switching between a filtering area and an ash removal area is achieved through rotation of the filter cylinder, a dense filter cake formed by viscous feed dust is effectively stripped under the negative pressure working condition by combining the synergistic effect of high-pressure pulse injection and reciprocating vibration of the filter cloth plate driven by the spring, the problems that traditional dust removal equipment is difficult in ash removal, and filter materials are prone to being blocked are solved, and the dust removal efficiency is improved. The filtering efficiency and the equipment operation continuity are obviously improved.

Description

Technical Field

[0001] This invention relates to the field of feed processing technology, and in particular to a negative pressure dust removal device for poultry feed production. Background Technology

[0002] In poultry feed production, the crushing, mixing, pelleting, and conveying of raw materials generate a large amount of dust. This dust not only causes raw material loss and reduces product yield, but also poses a serious threat to the production environment and the health of operators. High concentrations of dust can easily form explosive mixtures in confined spaces, posing significant safety hazards; furthermore, long-term inhalation can lead to occupational diseases such as pneumoconiosis. Therefore, efficient and reliable dust removal devices have become indispensable environmental protection and safety facilities in feed production lines.

[0003] Currently, baghouse dust collectors are widely used in the feed processing industry for dust control. However, feed dust has its own unique characteristics: due to the presence of grease and moisture in the raw materials, the resulting dust particles are often small (usually below 10μm) and highly adhesive. This sticky dust easily forms a dense filter cake on the surface of the filter bags, causing a rapid increase in filtration resistance. To maintain operation, traditional baghouse dust collectors are often equipped with pulse-jet cleaning devices. However, conventional pulse-jet cleaning has significant limitations when dealing with feed dust—due to the short duration of high-pressure gas action, the energy is insufficient to penetrate the sticky filter cake, resulting in poor cleaning performance. Especially under negative pressure conditions, the external atmospheric pressure further "presses" the filter cake onto the filter media surface, making cleaning even more difficult. Over time, the equipment becomes frequently clogged due to cleaning failure, the system airflow decreases sharply, and eventually, manual cleaning is required, severely impacting production continuity and efficiency. In recent years, although some technologies have attempted to introduce mechanical vibration or sonic cleaning as an aid, these methods often suffer from problems such as uneven cleaning, damage to filter materials, or excessive energy consumption, failing to fundamentally solve the problem of efficient removal of sticky dust under negative pressure.

[0004] Therefore, there is an urgent need to develop a new dust removal structure that can achieve active and efficient dust removal of filter media under negative pressure operation, so as to balance high filtration accuracy and long-term stable operation and meet the actual needs of modern poultry feed production. Summary of the Invention

[0005] In order to overcome the shortcomings of existing dust removal devices in handling sticky feed dust under negative pressure conditions, such as difficulty in dust removal and easy clogging of filter media, this invention provides a negative pressure dust removal device for poultry feed production.

[0006] A negative pressure dust removal device for poultry feed production includes a wind box and further includes: a filter assembly rotatably disposed within the wind box for filtering dust-laden airflow; a drive assembly disposed on the wind box for driving the filter assembly to rotate intermittently; and a cleaning assembly disposed on the wind box for performing high-pressure pulse cleaning on the filter assembly rotated to a specific position. The wind box has an air inlet window on its front side and an air outlet pipe fixedly connected to its left side. An air pressure sensor for monitoring filtration resistance is disposed within the air outlet pipe. The air pressure sensor is electrically connected to the drive assembly and is used to automatically trigger the rotation switching of the filter assembly based on changes in air pressure.

[0007] Furthermore, the filtration assembly includes a filter cartridge and twenty filter cloth plates; the filter cartridge is rotatably connected to the air box; the twenty filter cloth plates are rotatably connected to the filter cartridge in a uniform circumferential direction, and the inner side of each filter cloth plate is connected to the filter cartridge by symmetrical left and right springs.

[0008] Furthermore, it also includes a wind duct and a connecting plate; the connecting plate is detachably installed on the right side of the wind box by evenly distributed screws; the wind duct is fixed to the left side of the connecting plate and located inside the wind box; the filter cartridge is rotatably connected between the inner wall of the wind box and the outer wall of the wind duct.

[0009] Furthermore, the front side of the air duct is provided with a 72° fan-shaped compartment that matches the air inlet window, and the left side of the compartment is provided with an air outlet; the inlet end of the air outlet pipe is attached to the left side of the air duct and aligned with the air outlet for communication.

[0010] Furthermore, the portion corresponding to the 72° sector-shaped compartment of the filter cartridge and the air duct is designated as the working area, while the remaining 288° portion is designated as the idle area; the dust removal component is positioned corresponding to the idle area.

[0011] Furthermore, the drive assembly includes a first fixed frame, a motor, a gear, and a gear ring; the first fixed frame is fixedly connected to the left side of the air duct, the motor is installed inside the first fixed frame, and its output shaft is fixedly connected to the gear through a coupling; the gear ring is located on the inner side of the left end of the filter cartridge and meshes with the gear.

[0012] Furthermore, the dust removal assembly includes a high-pressure air outlet nozzle; the high-pressure air outlet nozzle is disposed on the air outlet pipe, and it penetrates into the filter cartridge from the left wall of the air duct, with the nozzle facing downward and in contact with the inner wall of the filter cartridge; the air box has a dust outlet window on the side near the high-pressure air outlet nozzle.

[0013] Furthermore, a dust removal assembly is also provided inside the air outlet duct. The dust removal assembly includes a second fixed frame, a rotating shaft, a fan blade, and a spiral frame. The two second fixed frames are symmetrically fixed inside the air outlet duct, and the rotating shaft is rotatably connected between the two second fixed frames. The fan blade and the spiral frame are both fixed to the rotating shaft.

[0014] Furthermore, a collection box is fixedly connected to the left side of the bottom wall of the air outlet duct, and the bottom of the collection box is provided with a detachable magnetic sealing plate for collecting the dust conveyed by the dust removal component.

[0015] The present invention has the following advantages: This device achieves dynamic switching between the filtration area and the dust removal area by rotating the filter cartridge. Combined with the synergistic effect of high-pressure pulse jet cleaning and spring-driven reciprocating vibration of the filter cloth plate, it effectively peels off the dense filter cake formed by sticky feed dust under negative pressure conditions, solving the pain points of difficult dust removal and easy clogging of filter media in traditional dust removal equipment, and significantly improving filtration efficiency and the continuity of equipment operation.

[0016] A pressure sensor is used to monitor changes in filtration resistance in real time, and it forms an automatic feedback control system with the motor drive component. When the pressure is detected to be lower than the set threshold, the filter cartridge rotation is automatically triggered to switch, realizing on-demand rotation and online cleaning of the filter unit. This avoids frequent manual intervention, reduces operation and maintenance costs, and ensures long-term stable operation of the system.

[0017] The exhaust duct is equipped with a dust removal component consisting of airflow-driven fan blades and a spiral frame. It uses the residual energy of the exhaust to automatically clean and transport the deposited dust to the collection box. The bottom magnetic sealing plate is removable for easy centralized cleaning, which reduces the risk of secondary blockage of the duct and avoids secondary dust caused by manual cleaning, thus improving the environmental friendliness of the equipment. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a three-dimensional structural diagram of the components of the present invention, such as the bellows, connecting plate, and air duct.

[0020] Figure 3 This is a three-dimensional structural diagram of the air outlet duct, the first fixing frame, and the spiral frame of the present invention.

[0021] Figure 4 This is a three-dimensional structural diagram of the high-pressure air outlet nozzle, filter cartridge, and filter cloth plate of the present invention.

[0022] Figure 5 This is a three-dimensional structural diagram of the components of the present invention, including the air pressure sensor, air outlet pipe, and air duct.

[0023] Figure 6 This is a three-dimensional structural diagram of the air duct of the present invention.

[0024] Figure 7 This is a three-dimensional structural diagram of the filter cartridge and filter cloth plate of the present invention.

[0025] Figure 8 This is a three-dimensional structural cross-sectional view of the filter cartridge, spring, and filter cloth plate of the present invention.

[0026] Figure 9 This is a three-dimensional structural diagram of the motor, gear, and gear ring components of the present invention.

[0027] Figure 10 This is a three-dimensional structural diagram of the second fixing frame, rotating shaft, and screw frame of the present invention.

[0028] The meanings of the reference numerals in the figure are as follows: 101: bellows, 102: air outlet pipe, 1021: connecting plate, 103: air inlet window, 104: air duct, 105: high-pressure air outlet nozzle, 106: ash outlet window, 107: filter cartridge, 108: filter cloth plate, 109: spring, 110: air pressure sensor, 201: first fixed frame, 202: motor, 203: gear, 204: gear ring, 301: second fixed frame, 302: rotating shaft, 303: spiral frame, 304: fan blade, 305: collection box. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. It is hereby declared that the directional terms such as up, down, left, right, front, back, inside, and outside used in this text are based solely on the accompanying drawings and are not intended to specifically limit the invention.

[0030] Example 1: A negative pressure dust removal device for poultry feed production, such as... Figures 1-6 As shown, the device includes a bellows 101 with an air inlet window 103 on its front for guiding dust-laden airflow. A connecting plate 1021 is detachably mounted on the right side of the bellows 101 using evenly distributed screws. A duct 104 is fixedly connected to the left side of the connecting plate 1021, located inside the bellows 101. A cylindrical filter assembly for filtering feed dust is provided between the inner wall of the bellows 101 and the outer wall of the duct 104. A 72° fan-shaped compartment matching the air inlet window 103 is provided on the front side of the duct 104, with an air outlet on the left side for guiding filtered clean air out. An air outlet pipe 102 is fixedly connected to the left side of the bellows 101, with its inlet end connected to the air outlet. The left side of the duct 104 is attached to each other, and the air outlet of the duct 104 is aligned with the inlet end of the air outlet pipe 102 to facilitate airflow. The part of the filter assembly corresponding to the 72° fan-shaped compartment of the duct 104 serves as the working area for real-time filtration of dust-laden airflow, while the other part of the filter assembly (288° area) serves as the idle area for offline cleaning. The air outlet pipe 102 is equipped with a high-pressure air nozzle 105 for cleaning the idle area in the filter assembly. The high-pressure air nozzle 105 penetrates into the filter assembly from the left wall of the duct 104, and the nozzle of the high-pressure air nozzle 105 is set downward and attached to the inner wall of the filter assembly to achieve high-frequency pulse impact on the filter material.

[0031] like Figure 7 and Figure 8 As shown, specifically, the filter assembly includes a filter cartridge 107 rotatably connected between the air box 101 and the air duct 104, used to realize dynamic switching between the filtration area and the dust removal area; it is rotatably connected with uniformly distributed filter cloth plates 108 in the circumferential direction, and the inner side of each filter cloth plate 108 is connected to the filter cartridge 107 by left and right symmetrical springs 109. The springs 109 are used to make the filter cloth plate 108 reciprocate under the action of high pressure gas to enhance the dust removal effect.

[0032] like Figure 9 As shown, specifically, the air duct 104 is provided with a drive assembly for controlling the rotation and switching of the filter cartridge 107. The drive assembly includes a first fixed frame 201 fixed to the left side of the air duct 104, in which a motor 202 is installed as a rotational power source. The output shaft of the motor 202 is fixed to a gear 203 through a coupling. A gear ring 204 is provided in the left end of the filter cartridge 107. The gear 203 and the gear ring 204 mesh with each other to form a gear 203 transmission system, which is used to precisely control the rotation angle of the filter cartridge 107.

[0033] like Figure 5 As shown, specifically, the air outlet duct 102 is equipped with an air pressure sensor 110, which is used to monitor the changes in system negative pressure and filtration resistance in real time; it is electrically connected to the motor 202 through a control module to form an automatic feedback control system, which automatically triggers the filter cartridge 107 to rotate and switch when the air pressure is lower than the set threshold.

[0034] like Figure 4 As shown, specifically, the air box 101 has a dust discharge window 106 on the side near the high-pressure air outlet nozzle 105, which is used to discharge the dust that has been cleaned off in a timely manner.

[0035] like Figure 9 and Figure 10 As shown, specifically, the air outlet duct 102 is equipped with a dust removal component for cleaning the dust accumulated inside. The dust removal component includes two second fixed frames 301 symmetrically fixed inside the air outlet duct 102. A rotating shaft 302 is rotatably connected between the two second fixed frames 301. A fan blade 304 and a spiral frame 303 are fixed on the rotating shaft 302. This structure is driven by airflow power to realize the automatic cleaning and conveying of dust deposited on the inner wall of the air outlet duct 102.

[0036] A dust collection box 305 is fixedly connected to the left side of the bottom wall of the air outlet duct 102 to collect the dust transported therefrom; the bottom of the collection box 305 is provided with a removable magnetic sealing plate for easy regular cleaning and maintenance.

[0037] Working principle: This device operates under negative pressure. First, start the fan connected to the air outlet duct 102. After the system negative pressure stabilizes, start the feed production equipment.

[0038] Dust-laden airflow enters the air box 101 through the air inlet window 103 under negative pressure, and then passes through the filter cloth plate 108 located in the working area (corresponding to the 72° fan-shaped compartment of the air box) of the filter cartridge 107. The dust is trapped on the outer surface of the filter cloth plate 108, and the clean air is discharged into the atmosphere after passing through the air outlet hole of the air box 104 and the air outlet pipe 102 in sequence.

[0039] As filtration proceeds, feed dust (which is highly sticky due to its oil and moisture content) gradually forms a dense filter cake on the surface of the filter cloth plate 108, causing an increase in filtration resistance and a decrease in air pressure inside the outlet duct 102. When the air pressure sensor 110 detects a value below a set threshold, the control system automatically triggers the motor 202 to drive the gear 203 to mesh with the gear ring 204, rotating the filter cartridge 107 72°, thus dynamically switching between the working area and the idle area. The clogged filter cloth plate 108 moves into the idle area (corresponding to the position of the high-pressure air outlet nozzle 105) for cleaning, while the clean filter cloth plate 108 moves into the working area to maintain filtration, the air pressure immediately returns to normal, and the motor 202 stops.

[0040] During the dust removal process, the high-pressure air nozzle 105 injects high-pressure gas into the filter cloth plate 108 in the idle area in a high-frequency pulse manner. Under the action of air pressure, the filter cloth plate 108 overcomes the tension of the spring 109 and flips downward. During the air jet interval, it returns to its original position under the restoring force of the spring 109. This repetition creates high-frequency vibration, effectively breaking down and peeling off the sticky filter cake. The detached dust is discharged from the machine through the dust outlet window 106.

[0041] In addition, the airflow through the outlet duct 102 drives the fan blades 304 to rotate, which in turn drives the coaxial spiral frame 303 to rotate, automatically conveying the dust deposited inside the duct to the collection box 305. Workers can periodically remove the magnetic sealing plate at the bottom of the collection box 305 for cleaning.

[0042] This device achieves dynamic switching between filtration and dust removal zones through the rotation of the filter cartridge 107. Combined with the synergistic effect of high-frequency pulse jet cleaning and filter plate vibration, it realizes efficient removal of sticky feed dust and continuous and stable operation of the equipment.

[0043] Those skilled in the art should understand that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A negative pressure dust removal device for poultry feed production, characterized in that, The device includes a bellows (101) and a filter assembly rotatably disposed within the bellows (101) for filtering dust-laden airflow; a drive assembly disposed on the bellows (101) for driving the filter assembly to rotate intermittently; and a dust removal assembly disposed on the bellows (101) for performing high-pressure pulse dust removal on the filter assembly rotated to a specific position. The bellows (101) has an air inlet window (103) on its front side and an air outlet pipe (102) fixedly connected to its left side. The air outlet pipe (102) is provided with a pressure sensor (110) for monitoring the filter resistance. The pressure sensor (110) is electrically connected to the drive assembly and is used to automatically trigger the rotation switching of the filter assembly according to changes in air pressure.

2. The negative pressure dust removal device for poultry feed production according to claim 1, characterized in that, The filter assembly includes a filter cartridge (107) and twenty filter cloth plates (108); the filter cartridge (107) is rotatably connected to the air box (101); the twenty filter cloth plates (108) are rotatably connected to the filter cartridge (107) in a uniform circumferential direction, and the inner side of each filter cloth plate (108) is connected to the filter cartridge (107) by left and right symmetrical springs (109).

3. The negative pressure dust removal device for poultry feed production according to claim 2, characterized in that, It also includes a duct (104) and a connecting plate (1021); the connecting plate (1021) is detachably installed on the right side of the air box (101) by evenly distributed screws; the duct (104) is fixed to the left side of the connecting plate (1021) and located inside the air box (101); the filter cartridge (107) is rotatably connected between the inner wall of the air box (101) and the outer wall of the duct (104).

4. A negative pressure dust removal device for poultry feed production according to claim 3, characterized in that, The front side of the air duct (104) is provided with a 72° fan-shaped compartment that matches the air inlet window (103), and the left side of the compartment is provided with an air outlet; the inlet end of the air outlet pipe (102) is attached to the left side of the air duct (104) and aligned with the air outlet for communication.

5. A negative pressure dust removal device for poultry feed production according to claim 4, characterized in that, The portion corresponding to the 72° fan-shaped compartment of the filter cartridge (107) and the air duct (104) serves as the working area, while the remaining 288° portion serves as the idle area; the dust removal component is positioned at the location corresponding to the idle area.

6. A negative pressure dust removal device for poultry feed production according to claim 5, characterized in that, The drive assembly includes a first fixed frame (201), a motor (202), a gear (203), and a gear ring (204); the first fixed frame (201) is fixed to the left side of the air duct (104), the motor (202) is installed inside the first fixed frame (201), and its output shaft is fixed to the gear (203) through a coupling; the gear ring (204) is located on the inner side of the left end of the filter cartridge (107) and meshes with the gear (203).

7. A negative pressure dust removal device for poultry feed production according to claim 5, characterized in that, The dust removal assembly includes a high-pressure air nozzle (105); the high-pressure air nozzle (105) is disposed on the air outlet pipe (102), and it passes through the left wall of the air duct (104) into the filter cartridge (107), with the nozzle facing downward and in contact with the inner wall of the filter cartridge (107); the air box (101) has a dust discharge window (106) on the side near the high-pressure air nozzle (105).

8. A negative pressure dust removal device for poultry feed production according to claim 1, characterized in that, The air outlet pipe (102) is also equipped with a dust removal component, which includes a second fixed frame (301), a rotating shaft (302), a fan blade (304), and a spiral frame (303). The two second fixed frames (301) are symmetrically fixed inside the air outlet pipe (102). The rotating shaft (302) is rotatably connected between the two second fixed frames (301). The fan blade (304) and the spiral frame (303) are both fixed on the rotating shaft (302).

9. A negative pressure dust removal device for poultry feed production according to claim 8, characterized in that, A collection box (305) is fixedly connected to the left side of the bottom wall of the air outlet pipe (102). The bottom of the collection box (305) is provided with a detachable magnetic sealing plate for collecting the dust conveyed by the dust removal component.

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