A whole grain assembly, a narrow particle distribution fine whole grain pulverizing device, and a pulverizing method

Abstract

The application discloses a whole-grain assembly, a narrow-granularity fine whole-grain crushing device and a crushing method, relates to the technical field of material crushing, and aims to solve the problem that the particle size of the whole-grain device is widely distributed in the range of 5-150 microns. The whole-grain device comprises a rack, a whole-grain assembly, a control system, a driving system and a collecting system, wherein the control system, the driving system and the collecting system are fixed on the rack, the discharge port of the whole-grain assembly is connected with the collecting system, the control system is connected with the driving system in signal connection for controlling the working state of the driving system, and the driving system is used for driving the rotation of the main shaft. The whole-grain assembly comprises a crushing chamber, the inside of the crushing chamber is provided with a screen, the top of the screen is connected with a feeding hopper, the screen divides the inner cavity of the crushing chamber into a V-shaped whole-grain cavity and a hammer whole-grain cavity which are arranged inside and outside and are independent, the V-shaped whole-grain cavity is provided with a primary crushing cutter, the hammer whole-grain cavity is provided with a secondary crushing cutter, and the primary crushing cutter is arranged 30 degrees ahead of the secondary crushing cutter. The application can obtain particles with concentrated particle size distribution.

Description

Technical Field

[0001] This invention relates to the field of material crushing technology, specifically to a granulation component, a fine granulation crushing device with narrow particle distribution, and a crushing method. Background Technology

[0002] While existing granulation equipment can granulate materials within the 5-150 micrometer range, the resulting particle size distribution within this range is quite wide, failing to meet the requirement for concentrated particle size. After granulation, the grinding chamber needs to be opened for manual cleaning, exposing the internal structure and increasing the risk of contamination. Furthermore, existing equipment has cleaning dead zones, preventing thorough cleaning and thus hindering online cleaning and sterilization. In addition, existing 5-150 micrometer granulation equipment occupies 10-15 square meters and requires 3-4 people to operate. To achieve the same output after granulation, the existing equipment would require significantly more space, higher purchase costs, and increased electrical consumption. Summary of the Invention

[0003] The purpose of this invention is to provide a granulation component, a fine granulation and pulverizing equipment with a narrow particle distribution, and a pulverizing method, to solve the problem that the particle size after granulation by existing granulation equipment is widely distributed in the range of 5-150 micrometers.

[0004] The technical solution adopted by the present invention to solve its technical problem is as follows: a granulation assembly, including a crushing chamber, the interior of which has a screen with an open top, the top of which is connected to a feed hopper, the screen dividing the inner cavity of the crushing chamber into an inner and outer, independent V-shaped granulation chamber and a hammer-type granulation chamber, the V-shaped granulation chamber having a primary crushing blade, the hammer-type granulation chamber having a secondary crushing blade, the primary crushing blade being positioned 30 degrees ahead of the secondary crushing blade, the primary and secondary crushing blades being fixed to the upper part of the main shaft, and the bottom of the crushing chamber having a discharge port communicating with the hammer-type granulation chamber.

[0005] Furthermore, the corners of both the V-shaped granulating cavity and the hammer-shaped granulating cavity are rounded.

[0006] Furthermore, the lower middle part of the main shaft extends into the transmission box, the upper periphery of the main shaft has a sealing ring, and there is a gas protective layer between the upper part of the main shaft and the sealing ring.

[0007] Furthermore, the top of the transmission box has a seal, the upper part of the main shaft passes through the seal, the seal has a sealing gas channel, and the sealing gas channel is connected to the gas protective layer.

[0008] Furthermore, the side wall and / or bottom of the grinding chamber are provided with a water-cooling jacket, and the side wall of the grinding chamber has a water inlet and a water outlet connected to the water-cooling jacket.

[0009] Furthermore, the side wall of the grinding chamber is equipped with a temperature probe, the sensing part of which extends into the screen.

[0010] The present invention also provides a fine granulation and crushing device with narrow particle distribution, including a frame, a granulation component, a control system, a drive system and a collection system. The control system, drive system and collection system are all fixed on the frame. The discharge port of the granulation component is connected to the collection system. The control system is signal-connected to the drive system to control the working state of the drive system. The drive system is used to drive the rotation of the main shaft.

[0011] Furthermore, the drive system includes a motor and a belt drive mechanism, and the output end of the motor is connected to the main shaft through the belt drive mechanism.

[0012] Furthermore, a negative pressure filter assembly is connected to the collection system. When the negative pressure filter assembly is working, it generates negative pressure in the collection system, causing the particles in the hammer milling chamber to enter the collection system through the discharge port, and causing the raw materials in the feed hopper to enter the V-shaped milling chamber.

[0013] This invention also provides a pulverizing method for a fine granulation equipment with a narrow particle distribution, comprising the following steps:

[0014] S1. Add raw materials into the feed hopper of the granulation assembly;

[0015] S2. The drive system is started through the control system, so that the granulation component works;

[0016] S3. Add cold water or cold air into the water-cooled jacket through the water inlet;

[0017] S4. After granulation, pure water or hot water is added to the pulverizing chamber through the feed hopper to rinse the pulverizing chamber, then steam is introduced for sterilization, and finally air is introduced to dry the pulverizing chamber.

[0018] The beneficial effects of this invention are as follows: By selecting a screen with an appropriate aperture and a spindle speed, the particle size of particles passing through the screen and entering the hammer milling chamber can be limited; subsequently, the particles are crushed to the target particle size by the secondary crushing blades in the hammer milling chamber; the design of the primary crushing blade leading the secondary crushing blade at a 30-degree angle ensures that the particles passing through the screen and entering the hammer milling chamber are immediately subjected to secondary crushing by the secondary crushing blades, avoiding the formation of particles with excessively small particle sizes due to excessive collisions in the crushing chamber, thereby resulting in a concentrated particle size distribution range after granulation. Attached Figure Description

[0019] Figure 1 This is the front view of the present invention;

[0020] Figure 2 This is a front view of the granulation assembly of the present invention;

[0021] Figure 3 This is a cross-sectional view of the pulverizing chamber of the present invention;

[0022] Figure 4 This is a cross-sectional view of the sealing element of the present invention;

[0023] Figure 5 This is a cross-sectional assembly view of the transmission box and main shaft of the present invention;

[0024] Figure 6 This is a top view of the pulverizing chamber of the present invention;

[0025] Figure 7 for Figure 5 Enlarged view of section A in the image;

[0026] In the diagram: 1. Granulation assembly, 11. Feed hopper, 12. Valve, 13. Grinding chamber, 131. V-type granulation chamber, 132. Hammer granulation chamber, 133. Water-cooled jacket, 134. Water inlet, 135. Mounting pipe, 14. Screen, 141. Rounded corner, 15. Transmission box, 151. Main shaft, 152. Gas protection layer, 153. Seal, 154. Sealed gas channel, 16. Temperature probe, 17. Primary pulverizer blade, 18. Secondary pulverizer blade, 19. Discharge port, 2. Control system, 3. Drive system, 31. Belt drive mechanism, 32. Driven pulley, 4. Collection system, 41. Negative pressure filter assembly, 5. Frame. Detailed Implementation

[0027] like Figures 1 to 5 As shown, the pulverizing equipment of the present invention includes a granulation component 1, a control system 2, a drive system 3, a collection system 4, and a frame 5. The structure, working principle, and usage of the present invention will be described in detail below with reference to the accompanying drawings.

[0028] like Figure 2 , Figure 3 As shown, the pelletizing assembly 1 includes a cylindrical grinding chamber 13. The interior of the grinding chamber 13 has an open-topped screen 14 with perforations. A feed hopper 11 is connected to the top of the screen 14, and a valve 12 is located on the feed hopper 11. The valve 12 is used to open and close the communication between the feed hopper 11 and the grinding chamber 13. The screen 14 divides the inner cavity of the grinding chamber 13 into an internally and externally separate V-shaped pelletizing chamber 131 and a hammer-type pelletizing chamber 132. Specifically, the inside of the screen 14 is the V-shaped pelletizing chamber 131, and the outside of the screen 14 is the hammer-type pelletizing chamber 132. The V-shaped pelletizing chamber 131 contains a primary grinding blade 17, and the hammer-type pelletizing chamber 132 contains a secondary grinding blade 18 located below the screen 14. Figure 6 As shown, in the horizontal plane, the primary crushing blade 17 is positioned ahead of the secondary crushing blade 18 by an angle of 30 degrees, meaning the angle between the primary crushing blade 17 and the secondary crushing blade 18 is 30 degrees. Both the primary crushing blade 17 and the secondary crushing blade 18 are fixed to the upper part of the main shaft 151. The bottom of the crushing chamber 13 has a discharge port 19 that communicates with the hammer mill granulation chamber 132. The working principle of the granulation assembly is as follows: raw materials are fed into the feed hopper 11, and the main shaft 151 is started to rotate. During the rotation of the main shaft 151, the primary crushing blade 17 performs primary crushing on the raw materials. When the size of the crushed raw material particles is smaller than the aperture of the screen 14, the raw material particles pass through the screen 14 and enter the hammer mill granulation chamber 132. In the hammer mill granulation chamber 132, the secondary crushing blade 18 performs secondary crushing on the raw material particles. By setting the screen 14 with a reasonable aperture size, the particle size range entering the hammer mill granulation chamber 132 can be reduced. The primary crushing blade 17 is positioned ahead of the secondary crushing blade 18. Particles crushed by the primary crushing blade 17 and entering the hammer mill granulation chamber 132 can be immediately crushed by the secondary crushing blade 18. This prevents excessive collisions within the hammer mill granulation chamber 132, which could result in excessively fine particle size, and thus avoids an excessively wide particle size distribution in the granulated particles. The bottom of the crushing chamber 13 has a discharge port 19 that communicates with the hammer mill granulation chamber 132. The crushed particles are discharged from the crushing chamber 13 through the discharge port 19.

[0029] To facilitate cleaning of the grinding chamber 13 and avoid the existence of cleaning dead corners, such as Figure 3 As shown, both the V-shaped granulating chamber 131 and the hammer granulating chamber 132 have rounded corners 141 at their corners. Specifically, the junction of the bottom and side surfaces of the screen 14 and the granulation chamber 13 have rounded corners 141 at their junctions. When the granulation chamber 13 is rinsed with water, the rounded corners 141 prevent particles from accumulating in the gaps, and also guide the water flow. Finally, the rounded corners 141 prevent particles from entering the gaps and failing to pulverize properly, thus avoiding an excessively large particle size distribution after discharge.

[0030] To prevent cross-contamination between the upper and middle parts of the spindle 151, the lower middle part of the spindle 151 extends into the transmission housing 15, and the upper outer periphery of the spindle 151 has a sealing ring, such as... Figure 2 , Figure 7As shown, a gas protective layer 152 is provided between the upper part of the main shaft 151 and the sealing ring. Air is introduced into the gas protective layer 152 to form a gas seal, which prevents particulate dust in the grinding chamber 13 from moving along the outer wall of the main shaft 151 into the transmission box 15, thereby contaminating the transmission box 15 and the main shaft 151 portion and main shaft 151 support components within the transmission box 15. The formation of the gas seal also prevents lubricating oil in the transmission box 15 from entering the grinding chamber 13. In addition, the gas protective layer 152 reduces frictional heat generation between the main shaft 151 and the sealing ring, as well as wear on the sealing ring, and the air in the gas protective layer 152 can reduce the temperature of the sealing ring and the upper part of the main shaft 151.

[0031] To facilitate the introduction of air into the gas protective layer 152, the top of the transmission housing 15 has a seal 153, through which the upper part of the main shaft 151 passes. Figure 4 As shown, the seal 153 has a sealing gas channel 154, which communicates with the gas protection layer 152. The sealing gas channel 154 connects to the gas protection layer 152 on one hand, and penetrates the side wall of the seal 153 on the other. After air is introduced into the sealing gas channel 154 from outside the seal 153, the air flows through the sealing gas channel 154 to the gas protection layer 152. The working principle of the gas protection layer 152 is to isolate and cool the spindle 151 through the formation of a gas seal.

[0032] To cool the grinding chamber 13, the side walls and / or bottom of the grinding chamber 13 are equipped with water-cooling jackets 133, such as... Figure 3 As shown, the side wall of the grinding chamber 13 has an inlet 134 and an outlet connected to the water-cooling jacket 133. Cold water or cold air is introduced into the water-cooling jacket 133 through the inlet 134, thereby cooling the grinding chamber 13. After heat exchange with the grinding chamber 13, the cold water or cold air flows back through the outlet. The temperature rise in traditional granulation equipment mainly comes from: ① the physical heat generated when large raw material particles are reduced to smaller particles; ② the frictional heat generated between the raw material and the grinding chamber 13; ③ the frictional heat generated between the sealing ring and the main shaft 151. The gas protection layer 152 solves the problem of frictional heat generation between the main shaft 151 and the sealing ring. The water-cooling jacket 133 solves the temperature rise problem in the grinding chamber 13 caused by the physical heat generated when large particles are reduced to smaller particles and the frictional heat generated between the raw material and the grinding chamber 13. The working principle of the water-cooled jacket 133 is: by adding cold water or cold air into the water-cooled jacket 133, heat exchange occurs between the jacket and the grinding chamber 13, thereby cooling the grinding chamber 13.

[0033] To monitor the temperature at the connection between the V-shaped granulating chamber 131 and the hammer granulating chamber 132, a temperature probe 16 is installed on the side wall of the grinding chamber 13. Specifically, an installation tube 135 is provided on the side wall of the grinding chamber 13, and the temperature probe 16 passes through the installation tube 135. The mounting part of the temperature probe 16 is fixedly connected to the end of the installation tube by screws or bolts, and the sensing part of the temperature probe 16 extends into the screen 14. By monitoring the temperature at the screen 14, it is convenient to understand the temperature inside the grinding chamber 13 in real time, and thus facilitate the adjustment of the fluid temperature entering the water-cooling jacket 133 to effectively cool the grinding chamber 13.

[0034] This invention discloses a fine granulation and crushing device with a narrow particle distribution, comprising a frame 5, a granulation assembly 1, a control system 2, a drive system 3, and a collection system 4. The control system 2, drive system 3, and collection system 4 are all fixed to the frame 5. The discharge port 19 of the granulation assembly 1 is connected to the collection system 4. The control system 2 is signal-connected to the drive system 3 to control its operating state. The drive system 3 drives the rotation of the main shaft 151. When crushing is required, a button on the control system panel is pressed to activate the drive system, which then drives the main shaft 151 to rotate and perform the crushing operation. The frame 5 is the foundation component of the fine granulation and crushing device with a narrow particle distribution, supporting the entire device. The bottom of the frame 5 has rollers to facilitate movement of the entire device. The drive system 3 includes a motor and a belt drive mechanism 31. The output end of the motor is connected to the lower part of the main shaft 151 via the belt drive mechanism 31. After starting the motor, the main shaft 151 rotates via the belt drive mechanism 31. Figure 5 As shown, the driven pulley 32 of the belt drive mechanism 31 is fixed on the main shaft 151.

[0035] To facilitate the entry of particles into the collection system 4 and the raw materials into the feed hopper 11, a negative pressure filter assembly 41 is connected to the collection system 4. When the negative pressure filter assembly 41 is working, it generates negative pressure within the collection system 4. Under this negative pressure, particles in the hammer mill sizing chamber 132 enter the collection system 4 through the discharge port 19, and the raw materials in the feed hopper 11 enter the V-shaped sizing chamber 131. The working principle of the negative pressure filter assembly 41 is as follows: by generating negative pressure within the collection system 4, particles in the hammer mill sizing chamber 132 enter the collection system 4 through the discharge port 19. At this time, the raw materials in the feed hopper 11 are replenished into the V-shaped sizing chamber 131. Since the temperature of the raw materials in the feed hopper 11 is lower than the temperature of the particles in the crushing chamber 13, the raw materials in the feed hopper 11 exchange heat with the particles in the V-shaped sizing chamber 131 after entering the V-shaped sizing chamber 131, which also helps to cool the crushing chamber 13.

[0036] According to the present invention, a fine granulation and grinding device with a narrow particle distribution and a fine granulation and grinding method with a narrow particle distribution are provided, comprising the following steps:

[0037] S1. Add raw materials into the feed hopper 11 of the granulation component 1;

[0038] S2. Start the drive system 3 through the control system 2 to make the granulation component 1 work;

[0039] S3. Add cold water or cold air into the water-cooled jacket 133 through the water inlet 134;

[0040] S4. After granulation, add pure water or hot water to the crushing chamber 13 through the feed hopper 11 to rinse the crushing chamber 13, then introduce steam for sterilization, and finally introduce air to dry the crushing chamber 13.

[0041] This invention limits the particle size of particles entering the hammer mill granulation chamber by selecting a suitable screen aperture and spindle speed. Subsequently, the particles are pulverized to the target particle size by a secondary pulverizing blade within the hammer mill granulation chamber. The primary pulverizing blade is designed to advance the secondary pulverizing blade by 30 degrees, ensuring that particles entering the hammer mill granulation chamber through the screen are immediately subjected to secondary pulverization by the secondary blade. This prevents excessive collisions within the pulverization chamber, resulting in particles with excessively small diameters and a more concentrated particle size distribution after granulation. The rounded corners 141 of the V-shaped granulation chamber 131 and the hammer mill granulation chamber 132 prevent particles from accumulating in the gaps, thus avoiding excessively large particle size distributions and eliminating cleaning dead zones when cleaning the pulverization chamber 13. The water-cooling jacket 133 effectively cools the pulverization chamber 13. The gas protective layer 152 serves two purposes: firstly, it isolates the main shaft 151 inside the pulverizing chamber 13 from the main shaft 151 inside the transmission box 15, preventing mutual contamination between the two; secondly, it cools the main shaft 151 and the sealing ring, thus preventing wear of the sealing ring and a decrease in assembly precision due to thermal expansion. The temperature probe 16 monitors the temperature inside the pulverizing chamber 13 in real time, allowing for adjustment of the temperature of the cold water or air added to the water-cooling jacket 133 based on the temperature inside the pulverizing chamber 13, ensuring effective cooling of the pulverizing chamber 13. Using the pulverizing equipment of this invention results in a narrow particle size distribution after granulation, significantly improving the utilization rate of raw materials, with a yield rate as high as 98%. It also reduces labor intensity, decreasing the number of operators from 4-5 to 1. Traditional airflow pulverizing equipment is large, with dimensions such as 2M*4M*4M, requiring working at heights, for example, when changing filter bags. This invention, however, only requires one main operator and one assistant. When cleaning is required, the grinding chamber 13 does not need to be opened, thus avoiding exposure and contamination of the grinding chamber 13.

Claims

1. A whole grain assembly comprising a pulverizing chamber, the interior of which has a top open screen, the top of which is connected with a feed hopper, characterized in that, The screen divides the inner cavity of the grinding chamber into an internally and externally independent V-shaped granulation chamber and a hammer-type granulation chamber. The V-shaped granulation chamber contains a primary granulator, and the hammer-type granulation chamber contains a secondary granulator. The primary granulator is positioned 30 degrees ahead of the secondary granulator, ensuring that particles passing through the screen and entering the hammer-type granulation chamber undergo secondary granulation under the action of the secondary granulator. This prevents particles from becoming too small due to excessive collisions within the grinding chamber, resulting in a concentrated particle size distribution after granulation. The corners of both the V-shaped and hammer-type granulation chambers are rounded. The side walls and / or bottom of the grinding chamber are equipped with water-cooling jackets. The side walls of the grinding chamber have inlets and outlets connected to the water-cooling jackets. The side walls of the grinding chamber are equipped with temperature probes, the sensing part of which extends into the screen. Both the primary and secondary granulator blades are fixed to the upper part of the main shaft, and the bottom of the grinding chamber has a discharge port communicating with the hammer-type granulation chamber.

2. The whole grain assembly of claim 1, wherein, The lower middle part of the main shaft extends into the transmission box, the upper outer periphery of the main shaft has a sealing ring, and there is a gas protective layer between the upper part of the main shaft and the sealing ring.

3. A sizing assembly according to claim 2, wherein, The top of the transmission box has a seal, the upper part of the main shaft passes through the seal, the seal has a sealing gas channel, and the sealing gas channel is connected to the gas protective layer.

4. A particle size distribution narrow fine grinding plant comprising a size assembly according to any one of claims 1 to 3, characterized in that, It includes a frame, a pelletizing assembly, a control system, a drive system, and a collection system. The control system, drive system, and collection system are all fixed on the frame. The discharge port of the pelletizing assembly is connected to the collection system. The control system is signal-connected to the drive system to control the working state of the drive system. The drive system is used to drive the rotation of the main shaft.

5. The particle size distribution narrow fine classification and granulation pulverizing apparatus according to claim 4, wherein The drive system includes a motor and a belt drive mechanism, and the output end of the motor is connected to the main shaft through the belt drive mechanism.

6. The particle size distribution narrow fine classification and granulation pulverizing apparatus according to claim 5, wherein The collection system is connected to a negative pressure filter assembly. When the negative pressure filter assembly is working, it generates negative pressure in the collection system, which causes the particles in the hammer milling chamber to enter the collection system through the discharge port, and causes the raw materials in the feed hopper to enter the V-shaped milling chamber.

7. The pulverizing method of the particle distribution narrow and fine size adjustment pulverizing apparatus according to any one of claims 4 to 5, characterized by, Includes the following steps: S1. Add raw materials into the feed hopper of the granulation assembly; S2. The drive system is started through the control system, so that the granulation component works; S3. Add cold water or cold air into the water-cooled jacket through the water inlet; S4. After granulation, pure water or hot water is added to the pulverizing chamber through the feed hopper to rinse the pulverizing chamber, then steam is introduced for sterilization, and finally air is introduced to dry the pulverizing chamber.

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