Ultra-high molecular weight plant fiber extraction and purification equipment

Abstract

The present invention relates to the field of new material technology, and specifically to an ultra-high molecular weight plant fiber extraction and purification device, comprising an organic solvent tank, an extraction tower, an intermediate tank and a crystallization kettle connected in sequence, wherein the extraction tower is a longitudinal cavity structure, and a stirring and crushing cylinder is arranged axially inside; a Jiaolong transmission mechanism and a grinding and crushing mechanism are arranged inside the stirring and crushing cylinder; the extraction tower is provided with a solvent inlet, and the solvent inlet is connected to the liquid outlet of the organic solvent tank; the extraction tower is provided with a feed inlet; the extraction tower is provided with a discharge port, and the discharge port is connected to the crystallization kettle through the intermediate tank; the organic solvent tank is filled with ammonia and ammonium salt solvents. The present invention improves the output ratio of fibers in plant fibers by dissolving ammonia and ammonium salt solvents and coordinating a series of integrated crushing, grinding, stirring and dissolving steps, and achieves the purpose of increasing the molecular weight of plant fibers and facilitating subsequent purification.

Description

Technical Field

[0001] The invention relates to the technical field of new materials, and in particular to an ultra-high molecular weight plant fiber extraction and purification device. Background Art

[0002] Plant fiber is a thick-walled tissue widely distributed in seed plants. Its cells are slender, pointed at both ends, and have thick secondary walls. There are often single pits on the walls, and there are generally no living protoplasts when mature. At present, the extraction device of plant fiber includes repeated crushing and crushing. The equipment in this process not only wastes energy, but also seriously affects the work efficiency. At the same time, the molecular weight of the plant fiber finally obtained is generally low. Therefore, the existing equipment needs to be improved in production efficiency and production quality. Summary of the invention

[0003] The invention provides an ultra-high molecular weight plant fiber extraction and purification device, which improves the fiber output ratio in the plant fiber by dissolving under the action of ammonia and ammonium salt solvent and in combination with a series of integrated crushing, grinding, stirring and dissolving steps, and achieves the purpose of increasing the molecular weight of the plant fiber and facilitating subsequent purification.

[0004] In order to achieve the above-mentioned purpose, the present invention provides the following technical scheme: an ultra-high molecular weight plant fiber extraction and purification equipment, comprising an organic solvent tank, an extraction tower, an intermediate tank and a crystallization kettle connected in sequence, wherein the extraction tower is a longitudinal cavity structure, and a stirring and crushing cylinder is arranged axially inside; a dragon transmission mechanism and a grinding and crushing mechanism are arranged inside the stirring and crushing cylinder; the extraction tower is provided with a solvent inlet, and the solvent inlet is connected to the liquid outlet of the organic solvent tank; the extraction tower is provided with a feed port; the extraction tower is provided with a discharge port, and the discharge port is connected to the crystallization kettle through the intermediate tank; the organic solvent tank is filled with ammonia and ammonium salt solvents.

[0005] Preferably, the Jiaolong transmission mechanism includes a lower Jiaolong blade, which is engaged with the inside of the mixing and crushing cylinder through a first hollow shaft, and the bottom end of the first hollow shaft passes through the bottom of the extraction tower through an axis hole and extends downward, and a first water seal sleeve is provided at the bottom end of the first hollow shaft, and the first water seal sleeve is connected to the solvent inlet, the top of the first hollow shaft is closed, and a plurality of through holes are provided on the side wall; a driving motor is provided outside the extraction tower, and the output shaft of the driving motor passes through the outer wall of the extraction tower and the outer wall of the mixing and crushing cylinder in turn through a sleeve, and is transmitted to the top of the first hollow shaft through a gear system; a lower fixed grinding disc is provided at the bottom of the mixing and crushing cylinder, and a lower rotating grinding disc is provided above the lower fixed grinding disc, the lower rotating grinding disc is connected to the first hollow shaft, and the lower fixed grinding disc and the lower rotating grinding disc are respectively provided with corresponding cutting holes.

[0006] Preferably, the Jiaolong transmission mechanism also includes an upper Jiaolong blade, which is engaged inside the mixing and crushing cylinder through a second hollow shaft, and the top end of the first hollow shaft passes through the top of the extraction tower through an axial hole and extends upward, a second water seal sleeve is provided at the top of the second hollow shaft, the second water seal sleeve is connected to the solvent inlet, the bottom end of the second hollow shaft is closed, and a plurality of through holes are provided on the side wall; the bottom end of the second hollow shaft is transmitted to the gear system.

[0007] Preferably, the gear train includes a first bevel gear freely arranged on the output shaft of the driving motor, and second bevel gears respectively arranged at the top end of the first hollow shaft and the bottom end of the second hollow shaft, and the first bevel gear is meshed with each of the second bevel gears for transmission.

[0008] Preferably, an intermediate fixed grinding disc is fixed in the center of the mixing and crushing cylinder, and the first hollow shaft and the second hollow shaft are respectively provided with intermediate rotating grinding discs that frictionally cooperate with the intermediate fixed grinding disc; the intermediate fixed grinding disc and the two intermediate rotating grinding discs are respectively densely distributed with a number of corresponding cutting holes; the center of the intermediate fixed grinding disc is a hollow structure, and accommodates the gear train, and the output shaft of the driving motor passes through the intermediate fixed grinding disc.

[0009] Preferably, a thermal pushing system is further included, wherein the thermal pushing system includes a plurality of steam injection nozzles arranged at the bottom of the extraction tower, each of the steam injection nozzles is respectively connected to a steam pipe, the steam pipe runs through the inner wall of the extraction tower and is connected to a steam generator; a steam recovery port is provided at the top of the extraction tower, and the steam recovery port is connected to the organic solvent tank.

[0010] The beneficial effects of the present invention are as follows: the plant fiber raw material enters the extraction tower through the feed port, and the ammonia and ammonium salt solvent in the organic solvent tank are pumped into the extraction tower through the solvent inlet, and the driving motor rotates the upper dragon blade and the lower dragon blade through the gear system and the first hollow shaft and the second hollow shaft, and the plant fiber is transported downward in the stirring and crushing cylinder in cooperation with its own weight. In this process, the two intermediate rotating grinding discs and the intermediate fixed grinding disc produce mutual friction and rotation, and the plant fiber raw material is sheared and crushed by the relatively moving cutting holes in the process of passing through the two intermediate rotating grinding discs and the intermediate fixed grinding disc, and then further ground. When the lower dragon blade presses the lower rotating grinding disc and the lower fixed grinding disc, it will be sheared and crushed again, and ground twice. For this reason, the cutting hole diameter of the intermediate fixed grinding disc is larger than the cutting hole of the lower fixed grinding disc, so as to achieve a secondary crushing effect. The ammonia and ammonium salt solvent quickly dissolve the plant fiber, and under the action of the thermal pushing system, it is pushed upward by the steam jet nozzle, and returns to the top of the extraction tower from the gap between the outer wall of the stirring and crushing cylinder and the inner wall of the extraction tower, so as to carry out the next stirring and crushing process. The steam in the steam recovery port pressurizes the organic solvent tank, which is beneficial to the transportation of ammonia and ammonium salt solvents. According to the process parameters, the plant cellulose dissolved in the extraction tower enters the intermediate tank for precipitation through the discharge port, and finally enters the crystallization kettle for crystallization, thereby completing the entire extraction process of the plant fiber. Compared with the prior art, under the dissolving action of ammonia and ammonium salt solvents, and in conjunction with a series of integrated crushing, grinding, stirring, and dissolving steps, the fiber output ratio in the plant fiber is improved, and the purpose of increasing the molecular weight of the plant fiber and facilitating subsequent purification is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0013] Figure 2 It is a schematic diagram of the application state of the present invention;

[0014] Figure 3 A sectional view of the structure of the intermediate fixed grinding disc of the present invention. DETAILED DESCRIPTION

[0015] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] according to Figure 1 , Figure 2 , Figure 3 As shown, an ultra-high molecular weight plant fiber extraction and purification equipment comprises an organic solvent tank 1, an extraction tower 2, an intermediate tank 3 and a crystallization kettle 4 which are connected in sequence, wherein the extraction tower 2 is a longitudinal cavity structure, and a stirring and crushing cylinder 5 is arranged axially inside; a dragon transmission mechanism and a grinding and crushing mechanism are arranged inside the stirring and crushing cylinder 5; the extraction tower 2 is provided with a solvent inlet 8, and the solvent inlet 8 is connected to the liquid outlet of the organic solvent tank 1; the extraction tower 2 is provided with a feed port 10; the extraction tower 2 is provided with a discharge port 11, and the discharge port 11 is connected to the crystallization kettle 4 through the intermediate tank 3; the organic solvent tank 1 is filled with ammonia and ammonium salt solvents.

[0017] Wherein, the dragon transmission mechanism includes a lower dragon blade 12, which is matched inside the mixing and crushing cylinder 5 through a first hollow shaft 13, and the bottom end of the first hollow shaft 13 passes through the bottom of the extraction tower 2 through an axial hole and extends downward, and a first water seal sleeve 14 is provided at the bottom end of the first hollow shaft 13, and the first water seal sleeve 14 is connected to the solvent inlet 8, and the top of the first hollow shaft 13 is closed, and a plurality of through holes are provided on the side wall; a driving motor 15 is provided outside the extraction tower 2, and the output shaft of the driving motor 15 passes through the outer wall of the extraction tower 2 and the outer wall of the mixing and crushing cylinder 5 in turn through the sleeve, and is transmitted to the top of the first hollow shaft 13 through a gear train; a lower fixed grinding disc 17 is provided at the bottom of the mixing and crushing cylinder 5, and a lower rotating grinding disc 18 is provided above the lower fixed grinding disc 17, and the lower rotating grinding disc 18 is connected to the first hollow shaft 13, and the lower fixed grinding disc 17 and the lower rotating grinding disc 18 are respectively provided with corresponding cutting holes 20.

[0018] Among them, the dragon transmission mechanism also includes an upper dragon blade 19, which is matched inside the mixing and crushing cylinder 5 through a second hollow shaft 21, and the top of the first hollow shaft 13 passes through the top of the extraction tower 2 through the shaft hole and extends upward. The top of the second hollow shaft 21 is provided with a second water seal sleeve 22, and the second water seal sleeve 22 is connected to the solvent inlet 8. The bottom end of the second hollow shaft 21 is closed, and the side wall is provided with a plurality of through holes; the bottom end of the second hollow shaft 21 is transmitted to the gear system.

[0019] In addition, the gear train includes a first bevel gear 23 disposed freely on the output shaft of the driving motor 15, and second bevel gears 24 disposed at the top end of the first hollow shaft 13 and the bottom end of the second hollow shaft 21, respectively. The first bevel gear 23 meshes with each of the second bevel gears 24 for transmission.

[0020] An intermediate fixed grinding disc 25 is fixedly provided at the center of the mixing and crushing cylinder 5, and the first hollow shaft 13 and the second hollow shaft 21 are respectively provided with intermediate rotating grinding discs 26 that frictionally cooperate with the intermediate fixed grinding disc 25; the intermediate fixed grinding disc 25 and the two intermediate rotating grinding discs 26 are respectively densely distributed with a number of corresponding cutting holes 20; the center of the intermediate fixed grinding disc 25 is a hollow structure and accommodates the gear train, and the output shaft of the driving motor 15 passes through the intermediate fixed grinding disc 25.

[0021] It also includes a thermal push system, which includes a plurality of steam injection nozzles 28 arranged at the bottom of the extraction tower 2, each of the steam injection nozzles 28 is connected to a steam pipe 29, and the steam pipe 29 runs through the inner wall of the extraction tower 2 and is connected to a steam generator 30; a steam recovery port 31 is provided on the top of the extraction tower 2, and the steam recovery port 31 is connected to the organic solvent tank 1.

[0022] Through the above arrangement, the plant fiber raw material enters the extraction tower 2 through the feed port 10, and the ammonia and ammonium salt solvent in the organic solvent tank 1 are pumped into the extraction tower 2 through the solvent inlet 8, and the driving motor 15 rotates the upper dragon blade 19 and the lower dragon blade 12 through the gear system and the first hollow shaft 13 and the second hollow shaft 21, and is transported downward in the stirring and crushing cylinder 5 in cooperation with the dead weight of the plant fiber. During this process, the two intermediate rotating grinding discs 26 and the intermediate fixed grinding disc 25 produce mutual friction and rotation, and the plant fiber raw material is sheared and crushed by the relatively moving cutting holes 20 in the process of passing through the two intermediate rotating grinding discs 26 and the intermediate fixed grinding disc 25, and is then further ground. When the lower rotating grinding disc 18 and the lower fixed grinding disc 17 are pressed by the lower dragon blade 12, they will be sheared and crushed again, and ground for a second time. For this reason, the diameter of the cutting hole 20 of the intermediate fixed grinding disc 25 is larger than the cutting hole 20 of the lower fixed grinding disc 17, thereby achieving a secondary crushing effect.

[0023] In the above process, ammonia and ammonium salt solvents quickly dissolve the plant fibers, and under the action of the thermal push system, are pushed upward by the steam jet nozzle 28, and return to the top of the extraction tower 2 from the gap between the outer wall of the stirring and crushing cylinder 5 and the inner wall of the extraction tower 2, so as to carry out the next stirring and crushing process. The steam in the steam recovery port 31 pressurizes the organic solvent tank 1, thereby facilitating the transportation of ammonia and ammonium salt solvents. According to the process parameters, the dissolved plant cellulose in the extraction tower 2 enters the intermediate tank 3 through the discharge port 11 for precipitation, and finally enters the crystallization kettle 4 for crystallization, thereby completing the entire extraction process of the plant fibers.

[0024] Compared with the existing technology, under the dissolving action of ammonia and ammonium salt solvents, and in combination with a series of integrated crushing, grinding, stirring and dissolving steps, the fiber output ratio in plant fibers is improved, and the purpose of increasing the molecular weight of plant fibers and facilitating subsequent purification is achieved.

[0025] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An ultra-high molecular weight plant fiber extraction and purification device, comprising an organic solvent tank, an extraction tower, an intermediate tank and a crystallization kettle connected in sequence, characterized in that: The extraction tower is a longitudinal cavity structure, and a stirring and crushing cylinder is arranged axially inside; a dragon conveying mechanism and a grinding and crushing mechanism are arranged inside the stirring and crushing cylinder; the extraction tower is provided with a solvent inlet, and the solvent inlet is connected to the liquid outlet of the organic solvent tank; the extraction tower is provided with a feed inlet; the extraction tower is provided with a discharge outlet, and the discharge outlet is connected to the crystallization kettle through the intermediate tank; the organic solvent tank is filled with ammonia and ammonium salt solvent; The Jiaolong transmission mechanism includes a lower Jiaolong blade, which is matched inside the stirring and crushing cylinder through a first hollow shaft, and the bottom end of the first hollow shaft passes through the bottom of the extraction tower through an axis hole and extends downward, and a first water seal sleeve is provided at the bottom end of the first hollow shaft, and the first water seal sleeve is connected to the solvent inlet, the top of the first hollow shaft is closed, and a plurality of through holes are provided on the side wall; a driving motor is provided outside the extraction tower, and the output shaft of the driving motor passes through the outer wall of the extraction tower and the outer wall of the stirring and crushing cylinder in turn through a sleeve, and is transmitted to the top of the first hollow shaft through a gear train; a lower fixed grinding disc is provided at the bottom of the stirring and crushing cylinder, and a lower rotating grinding disc is provided above the lower fixed grinding disc, the lower rotating grinding disc is connected to the first hollow shaft, and the lower fixed grinding disc and the lower rotating grinding disc are respectively provided with corresponding cutting holes; The Jiaolong transmission mechanism also includes an upper Jiaolong blade, which is engaged with the inside of the mixing and crushing cylinder through a second hollow shaft, and the top end of the first hollow shaft passes through the top of the extraction tower through an axial hole and extends upward, a second water seal sleeve is provided at the top of the second hollow shaft, the second water seal sleeve is connected to the solvent inlet, the bottom end of the second hollow shaft is closed, and a plurality of through holes are provided on the side wall; the bottom end of the second hollow shaft is transmitted to the gear system.

2. The ultra-high molecular weight plant fiber extraction and purification equipment according to claim 1, characterized in that: The gear train includes a first bevel gear disposed freely on the output shaft of the driving motor, and second bevel gears disposed respectively at the top end of the first hollow shaft and the bottom end of the second hollow shaft, and the first bevel gear is meshed with each of the second bevel gears for transmission.

3. The ultra-high molecular weight plant fiber extraction and purification equipment according to claim 2, characterized in that: An intermediate fixed grinding disc is fixedly provided in the center of the mixing and crushing cylinder, and the first hollow shaft and the second hollow shaft are respectively provided with intermediate rotating grinding discs frictionally matched with the intermediate fixed grinding disc; the intermediate fixed grinding disc and the two intermediate rotating grinding discs are respectively densely provided with a number of corresponding cutting holes; the center of the intermediate fixed grinding disc is a hollow structure and accommodates the gear train, and the output shaft of the driving motor passes through the intermediate fixed grinding disc.

4. The ultra-high molecular weight plant fiber extraction and purification equipment according to claim 1, characterized in that: It also includes a thermal push system, which includes a plurality of steam injection nozzles arranged at the bottom of the extraction tower and surrounding the stirring and crushing cylinder, each of the steam injection nozzles is connected to a steam pipe, the steam pipe runs through the inner wall of the extraction tower and is connected to a steam generator; a steam recovery port is provided at the top of the extraction tower, and the steam recovery port is connected to the top of the organic solvent tank.

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