A superfine crushing process and crushing device for high-purity plant fibers

Abstract

The present application relates to the technical field of plant fiber processing, and particularly relates to a superfine crushing process and a crushing device for high-purity plant fiber, which comprises the following steps: step one, feeding pretreated plant fiber raw materials into the crushing device through the air selection feeding device; step two, performing primary crushing on the plant fiber raw materials through the primary crushing mechanism of the crushing device to obtain fiber coarse materials; step three, performing puffing on the fiber coarse materials through the puffing mechanism of the crushing device to obtain puffed particles; and step four, performing superfine crushing on the puffed particles through the secondary crushing mechanism of the crushing device; the present application provides a superfine crushing process and a crushing device for high-purity plant fiber, and the crushing process of the plant fiber raw materials is completed at one time, wherein the air selection feeding process performs primary screening on the raw materials and ensures the crushability of the raw materials, the puffing process is introduced for the raw materials that are difficult to crush, and then all the raw materials are uniformly crushed and ground after puffing, so that the degree of crushing and the purity of the plant fiber are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plant fiber processing, in particular to a superfine crushing process and device for high-purity plant fiber. BACKGROUND

[0002] In the food and traditional Chinese medicine processing industry, it is often necessary to process different particle size of powder fiber raw materials according to the requirements of the production process, which requires crushing and grading processing of plant fiber materials such as leaves and rhizomes. The conventional operation is to dry first, then crush, sieve, and return the coarse particles to the crushing process. This method is time-consuming and labor-intensive, and the grading operation is more troublesome when the raw materials are not dry enough. SUMMARY

[0003] The present application provides a superfine crushing process and device for high-purity plant fiber. The crushing process of plant fiber raw materials is completed at one time. To ensure the smoothness of the crushing process, the raw materials are first screened in the air selection feeding process, thus ensuring the crushability of the raw materials. In the crushing process, the raw materials that are difficult to crush are introduced into the puffing process. After puffing, all the raw materials are uniformly crushed and ground, thereby improving the degree of fineness and purity of the plant fiber.

[0004] To achieve the above purpose, the present application provides the following technical scheme: a superfine crushing process and device for high-purity plant fiber, the superfine crushing process comprising the following steps:

[0005] Step one, the pretreated plant fiber raw materials are sent into the crushing device through the air selection feeding device;

[0006] Step two, the primary crushing mechanism of the crushing device is used to crush the plant fiber raw materials to obtain fiber coarse materials and fiber fine materials;

[0007] Step three, the puffing mechanism of the crushing device is used to puff the fiber coarse materials to obtain puffed particles;

[0008] Step four, the secondary crushing mechanism of the crushing device is used to superfine crush the puffed particles and fiber fine materials to obtain the final product;

[0009] The pulverizing device comprises a longitudinally arranged first processing cylinder, a primary pulverizing mechanism arranged in the middle of the first processing cylinder, an inclined screen arranged at the bottom of the primary pulverizing mechanism, an extruding mechanism arranged outside the first processing cylinder, a distribution channel extending through the first processing cylinder and into the extruding mechanism arranged above the screen, a return channel arranged at the bottom of the extruding mechanism and extending into the first processing cylinder, and a secondary pulverizing mechanism arranged inside the first processing cylinder below the return channel.

[0010] Preferably, the first processing cylinder is provided with an opening downward feeding port at the top, the air separation feeding device is arranged below the feeding port and communicates with the feeding port through the output end at the top, and the first processing cylinder is provided with a decompression cabin at the top, the decompression cabin is provided with a decompression port at the top, and the decompression port is provided with a filter.

[0011] Preferably, the air separation feeding device is provided with a second processing cylinder arranged side by side with the first processing cylinder, the output end is arranged at the top of the second processing cylinder, the second processing cylinder is provided with a feeding channel extending through the inside at the middle, the bottom of the second processing cylinder is communicated with the air outlet of the fan, the air inlet of the fan is communicated with the decompression port, and the second processing cylinder is provided with a screen below the feeding channel, and a heater below the screen.

[0012] Preferably, the primary pulverizing mechanism comprises a plurality of groups of first rotating shafts arranged in parallel with each other, both ends of each first rotating shaft extend through the outer wall of the first processing cylinder and are mechanically connected with a first driving motor through a gear, a plurality of crushing wheels are arranged at the middle of each first rotating shaft along the length direction, and the crushing wheels of any two adjacent first rotating shafts are arranged staggered with each other.

[0013] Preferably, the secondary pulverizing mechanism comprises a plurality of groups of second rotating shafts arranged in parallel with each other, both ends of each second rotating shaft extend through the outer wall of the first processing cylinder and are mechanically connected with a second driving motor through a gear, a plurality of conical wheels are arranged at the middle of each second rotating shaft along the length direction, the conical wheels of any two adjacent second rotating shafts are frictionally matched with each other through the side walls, and V-shaped grooves are arranged at both side walls of each conical wheel along the same direction.

[0014] The present application has the advantages that the breaking process of the plant fiber raw material is completed at one time, in order to ensure the smoothness of the breaking process, the raw material is first screened in the air selection feeding process, thus ensuring the breakability of the raw material, and the raw material which is difficult to break is introduced into the puffing process in the breaking process, and after puffing, all the raw materials are uniformly ground, thus improving the fineness and purity of the plant fiber. The plant fiber raw material is blown upward under the action of the fan, and the heater below the blocking net heats the circulating air flow, thus the plant fiber raw material is also dried in the feeding process. The downwardly arranged feeding port avoids heavy foreign matters from being blown into the first processing cylinder, and the decompression cabin slows down the blown plant fiber raw material, ensures the gravity falling of the plant fiber raw material, and avoids the broken fiber powder from being blown away through the circulating air flow generated by the fan. The breaking wheel breaks and cuts the plant fiber raw material, and prepares for the next process. The two conical wheels cooperated with each other grind the fiber fragments through the side wall to achieve the breaking purpose, and ensure the fineness of the fiber. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0016] Figure 1 The process flow chart of the present application;

[0017] Figure 2 The overall structure diagram of the equipment of the present application;

[0018] Figure 3 The schematic diagram of the primary grinding mechanism of the present application;

[0019] Figure 4 The schematic diagram of the secondary grinding mechanism of the present application;

[0020] Figure 5 The schematic diagram of the side structure of the conical wheel of the present application. DETAILED DESCRIPTION

[0021] The technical solutions of the present application will be described clearly and completely in combination with the drawings of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0022] According to Figure 1 , Figure 2 ,Figure 3 、 Figure 4 、 Figure 5 As shown in FIG. 2, the superfine crushing process of high-purity plant fiber and the crushing device 2 include the following steps:

[0023] Step one, the pretreated plant fiber raw material is sent into the crushing device 2 through the air separation feeding device 1;

[0024] Step two, the plant fiber raw material is preliminarily crushed by the primary crushing mechanism 3 of the crushing device 2 to obtain fiber coarse material and fiber fine material;

[0025] Step three, the fiber coarse material is swelled by the swelling mechanism 4 of the crushing device 2 to obtain swelled particles;

[0026] Step four, the swelled particles and fiber fine material are superfine crushed by the secondary crushing mechanism 5 of the crushing device 2 to obtain the final product;

[0027] The crushing device 2 includes a longitudinally arranged first processing cylinder 6, the primary crushing mechanism 3 is arranged in the middle of the first processing cylinder 6, the bottom of the primary crushing mechanism 3 is provided with an inclined screen 7, the swelling mechanism 4 is arranged outside the first processing cylinder 6, and a distribution channel 8 extending through the first processing cylinder 6 and extending into the swelling mechanism 4 is arranged above the screen 7, the bottom of the swelling mechanism 4 is provided with a return channel 9 extending into the first processing cylinder 6, the free end of the return channel 9 is located below the screen 7, the secondary crushing mechanism is arranged inside the first processing cylinder 6 and below the return channel 9, and the bottom of the first processing cylinder 6 is provided with an outwardly extending discharge channel 10.

[0028] In the above process, the crushing process of the plant fiber raw material is completed at one time, in order to ensure the smoothness of the crushing process, the raw material is first screened in the air separation feeding process, thereby ensuring the crushability of the raw material, and the raw material that is difficult to crush is introduced into the swelling process during the crushing process, and after swelling, all the raw materials are uniformly crushed and ground, thereby improving the degree of crushing and purity of the plant fiber.

[0029] The first processing cylinder 6 is provided with an opening downward feeding port 11 at the top; the air separation feeding device 1 is arranged below the feeding port 11 and communicates with the feeding port 11 through the output end at the top; the first processing cylinder 6 is provided with a decompression cabin 12 at the top, the decompression cabin 12 is provided with a decompression port 13 at the top, and the decompression port 13 is provided with a filter 14.

[0030] In the above arrangement, the plant fiber raw material is blown upward under the action of the fan 16, and the heater 20 below the blocking net 19 heats the circulating air flow, so that the plant fiber raw material is also dried during the feeding process. The downwardly arranged feeding port 11 avoids heavy foreign matters from being blown into the first processing cylinder 6, and the decompression cabin 12 slows down the blown plant fiber raw material to ensure the gravity falling of the plant fiber raw material, and the circulating air flow generated by the fan 16 avoids the scattered fiber powder after crushing.

[0031] The primary crushing mechanism 3 includes a plurality of groups of first rotating shafts 22 parallel to each other, both ends of each first rotating shaft 22 penetrate the outer wall of the first processing cylinder, and the first driving motor 23 is mechanically driven through gears; a plurality of crushing wheels 24 are arranged at the middle of each first rotating shaft 22 along the length direction, and the crushing wheels 24 of any two adjacent first rotating shafts 22 are arranged staggered.

[0032] In this arrangement, the crushing wheel 24 crushes and cuts the plant fiber raw material to prepare for the next process.

[0033] The secondary crushing mechanism 5 includes a plurality of groups of second rotating shafts 25 parallel to each other, both ends of each second rotating shaft 25 penetrate the outer wall of the first processing cylinder, and the second driving motor 26 is mechanically driven through gears; a plurality of conical wheels 27 are arranged at the middle of each second rotating shaft 25 along the length direction, the conical wheels 27 of any two adjacent second rotating shafts 25 are frictionally matched with each other through the side walls, and V-shaped grooves 28 are formed in both side walls of each conical wheel 27 along the same direction.

[0034] In this arrangement, the two conical wheels 27 matched with each other grind the fiber fragments through the side walls to achieve the purpose of crushing and ensure the degree of fineness of the fiber.

[0035] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A process for ultrafine grinding of high-purity plant fibers, characterized in that... The ultrafine grinding process includes the following steps: Step 1: The pretreated plant fiber raw material is fed into the crushing device through an air-separation feeding device; Step 2: The plant fiber raw material is subjected to primary crushing by the primary crushing mechanism of the crushing device to obtain coarse fiber material and fine fiber material; Step 3: The coarse fiber is expanded using the expansion mechanism of the crushing device to obtain expanded granules; Step 4: The expanded particles and fiber fines are ultra-finely pulverized by the secondary pulverizing mechanism of the pulverizing device to obtain the final product; The pulverizing device includes a vertically arranged first processing cylinder, and the primary pulverizing mechanism is disposed in the middle of the first processing cylinder; The primary crushing mechanism is provided with an inclined screen at the bottom, the puffing mechanism is located outside the first processing cylinder, and a material distribution channel is provided above the screen that penetrates the first processing cylinder and extends into the puffing mechanism. The puffing mechanism is provided with a return channel that penetrates into the first processing cylinder at the bottom, and the free end of the return channel is located below the screen. The secondary crushing mechanism is located inside the first processing cylinder, below the return material channel; The bottom of the first processing cylinder is provided with an outwardly extending discharge channel; The first processing cylinder has a downward-facing feed inlet at the top; the air-separating feeding device is located below the feed inlet and is connected to the feed inlet through its top output end; the first processing cylinder has a pressure-reducing chamber at the top, the pressure-reducing chamber has a pressure-reducing port at the top, and a filter is installed inside the pressure-reducing port; The air-separating feeding device has a second processing cylinder parallel to the first processing cylinder, and the output end is located at the top of the second processing cylinder; the middle of the second processing cylinder has a feeding channel that communicates with the interior, the bottom of the second processing cylinder is connected to the air outlet of the blower, and the air inlet of the blower is connected to the pressure reducing port; the second processing cylinder is provided with a baffle below the feeding channel, and a heater is provided below the baffle.

2. The ultrafine grinding process for high-purity plant fibers according to claim 1, characterized in that: The primary crushing mechanism includes multiple sets of parallel first rotating shafts. Both ends of each first rotating shaft penetrate the outer wall of the first processing cylinder and are mechanically transmitted to a first drive motor via gears. Multiple crushing wheels are arranged at intervals along the length of each first rotating shaft, and the crushing wheels of any two adjacent first rotating shafts are staggered.

3. The ultrafine grinding process for high-purity plant fibers according to claim 1, characterized in that: The secondary crushing mechanism includes multiple sets of parallel second rotating shafts. Both ends of each second rotating shaft penetrate the outer wall of the first processing cylinder and are mechanically transmitted to a second drive motor via gears. Multiple conical wheels are arranged along the length of each second rotating shaft. The conical wheels of any two adjacent second rotating shafts are in frictional engagement with each other through their side walls. Furthermore, V-shaped grooves are formed on both side walls of each conical wheel in the same direction.

Images