Negative pressure dust removal structure of granulator discharge port
By designing a negative pressure dust removal structure at the discharge port of the granulator, and using guide plates and air outlet plates to collect material powder, the problems of dust leakage and adhesion are solved, achieving efficient collection of material powder and saving of raw materials.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TANGYIN YONGXIN CHEM CO LTD
- Filing Date
- 2025-07-07
- Publication Date
- 2026-06-09
AI Technical Summary
Dust leakage and powder adhesion exist at the discharge port of the granulator, affecting the gloss of the granules and increasing production costs.
Design a negative pressure dust removal structure for the discharge port of a granulator, including a guide plate, a perforated plate, an air outlet plate, a fan, and a filter bag. The structure draws in dust from the airflow through negative pressure and collects the dust with the cooperation of the guide plate and the air outlet plate, thereby reducing dust leakage and adhesion.
It effectively collects material powder, reduces dust leakage, improves the surface gloss of particles, and reduces raw material consumption and production costs.
Smart Images
Figure CN224333050U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of dust removal structure technology, and more specifically to a negative pressure dust removal structure at the discharge port of a granulator. Background Technology
[0002] A granulator is a mechanical device used to form powdered or other forms of materials into uniform granules. It is widely used in many industries such as chemical, pharmaceutical, food, and agriculture. Granulating the product improves the flowability of the material, reduces dust, and facilitates storage and transportation.
[0003] During the granulation process, a large amount of dust is generated. This dust not only adheres to the formed granule structure but also moves towards the discharge port with the granules, leaking into the environment through the discharge port. To reduce the impact of dust at the discharge port, a dust removal device is installed there. For example, Chinese Patent Application No. 202122006742.3 discloses a dust removal device for the discharge port of an extruder, which effectively removes dust from the discharge port, preventing powder from scattering and polluting the environment.
[0004] The following problems still exist when using dust removal equipment:
[0005] 1. The discharge port of the granulator will not only contain granules, but also a small amount of unextruded powder. This powder will move along with the granules, affecting the subsequent packaging of the granules. At the same time, some powder will adhere to the granules during the movement, which will directly affect the gloss of the granule surface and will easily stick together and cause clumping.
[0006] 2. During pellet production, the internal airflow carries the powder particles toward the discharge port, which can lead to powder gas leakage. This not only affects the surrounding environment but also wastes the powder and increases production costs.
[0007] Therefore, it is necessary to propose a negative pressure dust removal structure for the discharge port of a granulator to solve the above problems. Utility Model Content
[0008] To address the above problems, this utility model provides a negative pressure dust removal structure at the discharge port of a granulator, which has the function of collecting material powder, reducing the amount of material powder adhering to the granules. At the same time, it can collect material powder in the airflow, reducing the consumption of raw materials.
[0009] To achieve the above objectives, this utility model specifically adopts the following technical solution:
[0010] A negative pressure dust removal structure for the discharge port of a granulator includes an outer shell installed at the discharge port of the granulator. An inclined downward-facing guide plate is connected inside the outer shell. One end of the guide plate is connected to the discharge port of the granulator, and the other end of the guide plate is connected to a stepped frame. A dust collection frame is connected to the outer wall of the outer shell. A perforated plate is connected to the guide plate. The top of the dust collection frame is connected to the bottom of the perforated plate. Staggered air outlet plates are connected to the stepped frame, allowing particles to move from the perforated plate to the air outlet plates. Each air outlet plate has an upward-facing air outlet frame connected to its bottom. A fan is connected to one side of the outer shell, and an exhaust frame is connected to the top of the outer shell. An inlet pipe is connected between the inlet end of the fan and the exhaust frame. An outlet pipe is connected to the outlet end of the fan, with one end of the outlet pipe connected to two outlet frames respectively. A filter bag is installed inside the inlet pipe.
[0011] The air outlet frame is internally connected to equally spaced air guide plates, which are vertically arranged. The top of the outer casing is connected to a guide plate that faces the air outlet frame.
[0012] Preferably, in order to filter dust particles entering the air inlet pipe, one end of the filter bag is connected to a front support, the other end of the filter bag is connected to a rear support, the rear support has a through hole for air passage, the air inlet pipe is connected to a filter frame, and the outer ring surfaces of the front and rear supports are in contact with the inner wall of the filter frame.
[0013] Preferably, in order to facilitate the storage of intercepted dust particles in the filter bag, a supporting rib is connected between the front support and the rear support, and a positioning groove is provided on the inner wall of the filter frame to cooperate with the front support and the rear support.
[0014] Preferably, to facilitate cleaning of the filter bag, the filter frame includes a fixed frame and a movable frame. The fixed frame is connected to the air inlet pipe, one side of the movable frame is rotatably connected to the fixed frame, and the other end of the movable frame is connected to the fixed frame by bolts. A sealing ring is provided at the connection.
[0015] Preferably, in order to facilitate the cleaning of the material powder particles collected in the ash collection frame, a collection box is slidably connected inside the ash collection frame, and one end of the collection box is bolted to the ash collection frame.
[0016] Preferably, in order to guide the airflow in the exhaust frame into the air inlet duct, an air collection hood is connected between the air inlet duct and the exhaust frame.
[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0018] 1. This device is equipped with a perforated plate and an air outlet plate structure along the moving path. As the powder moves downward, it falls into the collection box through the holes in the perforated plate, which collects the powder and avoids waste. The particles are affected by the airflow blown out from below the air outlet plate, and the powder particles attached to them are carried away by the airflow, which reduces the amount of powder adhering to the surface, improves the gloss of the particle surface, and prevents the particles from clumping.
[0019] 2. Through the coordinated arrangement of the exhaust frame, fan, and filter bag, the exhaust frame is connected to the air inlet of the fan. The exhaust frame has negative pressure, which draws in the airflow containing dust. After the airflow containing material powder enters the air inlet pipe, it is intercepted by the filter bag, which has the function of intercepting material powder in the airflow, facilitating the recycling of material powder, reducing the consumption of raw materials, and at the same time, preventing the airflow containing material powder from leaking to the outside, thus reducing the impact on the surrounding environment. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the granulator and outer shell structure in this utility model;
[0021] Figure 2 This is a schematic diagram of the outer shell and ash collection rack structure in this utility model;
[0022] Figure 3 This is a schematic diagram of the outer shell and fan structure in this utility model;
[0023] Figure 4 This is a schematic diagram of the fine-hole plate and air outlet plate structure in this utility model;
[0024] Figure 5 This is a schematic diagram of the airflow inside the filter frame in this utility model;
[0025] Figure 6 This is a schematic diagram of the airflow inside the outer shell of this utility model.
[0026] Figure label:
[0027] 101. Granulator; 102. Outer shell; 103. Guide plate; 104. Ash collection rack; 105. Fine perforation plate; 106. Stepped rack; 107. Air outlet plate; 108. Air outlet rack; 109. Fan; 110. Exhaust rack; 111. Air inlet pipe; 112. Air outlet pipe; 113. Filter bag; 114. Air guide plate; 115. Guide plate; 116. Front support; 117. Rear support; 118. Fixed frame; 119. Movable frame; 120. Support rib; 121. Positioning groove; 122. Collection box; 123. Gas collection hood. Detailed Implementation
[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0029] The conventional components and key load-bearing components in this case are selected in accordance with standards in terms of material selection, heat treatment process and structural dimensions to ensure that they have sufficient strength, stiffness and fatigue resistance under rated load and expected working conditions. These are all conventional design considerations well known to those skilled in the art.
[0030] Because the raw materials cannot be completely granulated during production, a small amount of powder particles will move with the granules to the feed inlet. This not only wastes the powder but also causes some powder to adhere to the granules during movement, directly affecting their gloss and weight. Furthermore, the airflow inside the granulator 101 carries the powder particles towards the discharge outlet, leading to dust leakage and impacting the surrounding environment. The following structure provides a solution to these problems:
[0031] Please see Figure 1-6A negative pressure dust removal structure for the discharge port of a granulator includes a housing 102 installed at the discharge port of the granulator 101. Powdered raw materials are poured into the granulator 101, and rotating rollers compress the raw materials to form granules. The granules can have various shapes, such as round, cylindrical, and flake. During production, granules with regular surfaces are preferred as they have better mobility. It should be noted that irregularly shaped granules can also be used, but their mobility is inferior to that of granules with regular surfaces. The finished granules flow out from the discharge port on one side of the granulator 101. The granulator 101 is an existing device and will not be described in detail here. The outer casing 102 is internally connected to a downwardly inclined guide plate 103. One end of the guide plate 103 is connected to the discharge port of the granulator 101. The particles flowing out of the discharge port of the granulator 101 will move onto the guide plate 103. Some discharge ports of the granulator 101 are equipped with a shaking structure to accelerate the movement speed of the particles. At this time, the guide plate 103 is not connected to the discharge port, but is located below the discharge port. The other end of the guide plate 103 is connected to a stepped frame 106. A dust collection frame 104 is connected to the outer wall of the outer casing 102. A perforated plate 105 is connected to the guide plate 103. The perforated plate 105 has small holes smaller than the particles. When the powder slides on the perforated plate 105, it falls through the holes into the dust collection frame 104 at the bottom, thus collecting the powder. The particles move to a lower position on the perforated plate 105. The top of the dust collection frame 104 is connected to the bottom of the perforated plate 105. A staggered air outlet plate 107 is connected to the stepped frame 106, allowing particles to move from the perforated plate 105 to the air outlet plate 107. Figure 4 The stepped frame 106 has a stepped structure. When the particles move on the air outlet plate 107, they will move from the higher air outlet plate 107 to the lower air outlet plate 107. Due to the height difference between the two stepped structures, the particles may flip over when they land on the lower air outlet plate 107. It should be noted that flipping does not always occur. Even if they do not flip over, the amount of powder adhering to the particles is significantly reduced, which has the effect of reducing the amount of powder adhering and improving the surface gloss of the particles. The bottom of each air outlet plate 107 is connected to an air outlet frame 108 with the air vent facing upward. The air blown from the air outlet frame 108 flows upward, blowing off the powder adhering to the particles and carrying them away. The airflow pattern is described in [reference needed]. Figure 6A fan 109 is connected to one side of the outer casing 102, and an exhaust frame 110 is connected to the top of the outer casing 102. An air inlet pipe 111 is connected between the air inlet end of the fan 109 and the exhaust frame 110, and an air outlet pipe 112 is connected to the air outlet end of the fan 109. The airflow entering from the exhaust frame 110 enters the fan 109, and then enters the exhaust frame 108 through the air outlet pipe 112. Due to the negative pressure inside the exhaust frame 110, the airflow coming out of the granulator 101 outlet will move upward along with the airflow coming out of the exhaust frame 108, and then enter the air inlet pipe 111. One end of the exhaust pipe 112 is connected to the two exhaust frames 108 respectively. A filter bag 113 is installed inside the air inlet pipe 111, which can intercept dust entering the air inlet pipe 111.
[0032] refer to Figure 5 The air outlet frame 108 is internally connected to equally spaced air guide plates 114. These vertically arranged air guide plates 114 guide the airflow blowing from the air outlet frame 108 upwards, facilitating its entry into the exhaust frame 110. A guide plate 115, facing the exhaust frame 110, is connected to the top of the outer casing 102 to guide the airflow into the exhaust frame 110. In one embodiment, a pressure valve is installed on the air outlet pipe 112 to release pressure when the internal airflow pressure is too high. Because the gas is filtered, it will not affect the surrounding environment.
[0033] refer to Figure 5 In order to filter the dust entering the air inlet duct 111, one end of the filter bag 113 is connected to a front support 116, and the other end is connected to a rear support 117. The front support 116 and the rear support 117 support the filter bag 113. The rear support 117 has a through hole for airflow. A filter frame is connected to the air inlet duct 111. The outer ring surfaces of the front support 116 and the rear support 117 are in contact with the inner wall of the filter frame. The airflow pattern entering the air inlet duct 111 is shown in the reference diagram. Figure 5 .
[0034] refer to Figure 5 To facilitate the storage of intercepted dust within the filter bag 113, a support rib 120 is connected between the front support 116 and the rear support 117 to provide support. When the filter bag 113 is removed from the filter frame, the intercepted dust will be located inside the filter bag 113. The support rib 120 prevents the filter bag 113 from deforming. If the filter bag 113 deforms, it will compress the internal space, causing leakage of the collected dust. The inner wall of the filter frame is provided with a positioning groove 121 that cooperates with the front support 116 and the rear support 117 to facilitate positioning of the front support 116 and the rear support 117 and make disassembly and assembly convenient.
[0035] refer to Figure 5 To facilitate opening the filter frame for cleaning the filter bag 113, the filter frame includes a fixed frame 118 and a movable frame 119. The fixed frame 118 is connected to the air inlet pipe 111, and both ends of the fixed frame 118 are connected to the air inlet pipe 111. Airflow enters from one end of the air inlet pipe 111, passes through the fixed frame 118, and exits from the other end of the air inlet pipe 111. One side of the movable frame 119 is rotatably connected to the fixed frame 118, and the other end of the movable frame 119 is connected to the fixed frame 118 by bolts. Preferably, one end of the movable frame 119 is rotatably connected to the fixed frame 118 by a pin, and the other end is fixed to the fixed frame 118 by bolts. A sealing ring is provided at the connection to improve the sealing ability when closed.
[0036] refer to Figure 1 and Figure 4 To facilitate the cleaning of the material powder collected inside the dust collection frame 104, a collection box 122 is slidably connected inside the dust collection frame 104. The collection box 122 can be pulled out from the dust collection frame 104. The top of the dust collection frame 104 is provided with an inclined surface, so that the dust entering the dust collection frame 104 can easily slide into the collection box 122. One end of the collection box 122 is bolted to the dust collection frame 104 and is detachably installed on the dust collection frame 104 for easy cleaning.
[0037] refer to Figure 4 In order to guide the airflow in the exhaust frame 110 into the air inlet duct 111, an air collection hood 123 is connected between the air inlet duct 111 and the exhaust frame 110 to guide the airflow into the air inlet duct 111.
[0038] In this embodiment, reference Figure 6 , Figure 6 The black lines with arrows indicate the direction of airflow, the white ovals represent particles, and the white arrows indicate the direction of particle discharge. The outer shell 102 is connected to the discharge port of the granulator 101. The extruded finished granules move to the guide plate 103 through the discharge port on the granulator 101. As they slide down, they pass through the fine perforated plate 105 and two air outlet plates 107 in sequence. When passing through the fine perforated plate 105, the powder that comes out of the discharge port along with the granules falls through the holes in the fine perforated plate 105 into the dust collection rack 104 below, where the collection box 122 collects it. When they move to the first air outlet plate 107, the airflow blown out from the air outlet rack 108 below will carry away the powder attached to the granules. When they move to the junction of the two air outlet plates 107, they will fall from the steps, resulting in a flipping situation. At this time, the airflow blown out from below the second air outlet plate 107 will carry away the powder attached to the other side of the granules. Finally, they slide down from the step rack 106 and enter the next process.
[0039] As the air moves upward, it enters the exhaust frame 110, then passes through the air collection hood 123 into the air inlet pipe 111. After being filtered by the filter bag 113 inside the air inlet pipe 111, it enters the fan 109 and is then transported back to the air outlet frame 108. The filter bag 113 intercepts the dust in the airflow.
[0040] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.
Claims
1. A negative pressure dust removal structure at the discharge port of a granulator, characterized in that: The device includes a housing (102) installed at the discharge port of the granulator (101). Inside the housing (102) is a guide plate (103) that is inclined downward. One end of the guide plate (103) is connected to the discharge port of the granulator (101), and the other end of the guide plate (103) is connected to a stepped frame (106). A dust collection frame (104) is connected to the outer wall of the housing (102). A perforated plate (105) is connected to the guide plate (103). The top of the dust collection frame (104) is connected to the bottom of the perforated plate (105). A staggered air outlet plate (107) is connected to the stepped frame (106). The particles will move from the fine perforated plate (105) to the air outlet plate (107). The bottom of the air outlet plate (107) is connected to an air outlet frame (108) with the air outlet facing upward. A fan (109) is connected to one side of the outer shell (102). An exhaust frame (110) is connected to the top of the outer shell (102). An air inlet pipe (111) is connected between the air inlet end of the fan (109) and the exhaust frame (110). An air outlet pipe (112) is connected to the air outlet end of the fan (109). One end of the air outlet pipe (112) is connected to two air outlet frames (108) respectively. A filter bag (113) is installed inside the air inlet pipe (111). The air outlet frame (108) is internally connected to an air guide plate (114) that is evenly spaced. The air guide plate (114) is vertically arranged. The top of the outer shell (102) is connected to a guide plate (115) that is arranged toward the air outlet frame (110).
2. The negative pressure dust removal structure at the discharge port of a granulator according to claim 1, characterized in that: One end of the filter bag (113) is connected to a front support (116), and the other end of the filter bag (113) is connected to a rear support (117). The rear support (117) has a through hole for air passage. The air inlet pipe (111) is connected to a filter frame. The outer ring surfaces of the front support (116) and the rear support (117) are in contact with the inner wall of the filter frame.
3. The negative pressure dust removal structure at the discharge port of a granulator according to claim 2, characterized in that: A support rib (120) is connected between the front support (116) and the rear support (117), and a positioning groove (121) is provided on the inner wall of the filter frame to cooperate with the front support (116) and the rear support (117).
4. The negative pressure dust removal structure at the discharge port of a granulator according to claim 3, characterized in that: The filter frame includes a fixed frame (118) and a movable frame (119). The fixed frame (118) is connected to the air inlet pipe (111). One side of the movable frame (119) is rotatably connected to the fixed frame (118). The other end of the movable frame (119) is connected to the fixed frame (118) by bolts. A sealing ring is provided at the connection.
5. The negative pressure dust removal structure at the discharge port of a granulator according to claim 4, characterized in that: The ash collection rack (104) is internally slidably connected to a collection box (122), and one end of the collection box (122) is bolted to the ash collection rack (104).
6. The negative pressure dust removal structure at the discharge port of a granulator according to claim 5, characterized in that: A gas collection hood (123) is connected between the air inlet pipe (111) and the exhaust frame (110).