CN111663351A - Production method of prehydrolysis paper pulp for papermaking - Google Patents
Production method of prehydrolysis paper pulp for papermaking Download PDFInfo
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- CN111663351A CN111663351A CN202010441700.XA CN202010441700A CN111663351A CN 111663351 A CN111663351 A CN 111663351A CN 202010441700 A CN202010441700 A CN 202010441700A CN 111663351 A CN111663351 A CN 111663351A
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/02—Pretreatment of the raw materials by chemical or physical means
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/30—Defibrating by other means
- D21B1/34—Kneading or mixing; Pulpers
- D21B1/345—Pulpers
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/02—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/18—De-watering; Elimination of cooking or pulp-treating liquors from the pulp
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- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
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Abstract
The invention belongs to the technical field of paper pulp production, and particularly relates to a production method of prehydrolysis paper pulp for papermaking, wherein a drying device used in the method comprises a bottom plate, two support frames are fixed at the top end of the bottom plate, a slide way is fixed at the top end of each support frame, a semicircular groove is formed in one side, away from the adjacent support frame, of each slide way, a heating net is arranged in each semicircular groove, a first plate is fixed at the top end of each slide way, a second plate is fixed between the first plates, a first push rod motor is fixed at the bottom end of the second plate, two storage boxes are fixed at the top end of the first plate, an electromagnetic valve is fixed at the bottom end of each storage box, an air compressor is arranged on the bottom plate, and two; according to the invention, the water-containing paper pulp is dried after being baked by the heating net, and then the paper pulp is pressed into the paper cake by the pressing disc for storage, so that the whole process has high degree of mechanization, the problem that the paper pulp is frozen and hardened is solved, and the paper pulp is changed into the dried paper cake so as to be convenient for storage.
Description
Technical Field
The invention belongs to the technical field of paper pulp production, and particularly relates to a production method of prehydrolysis paper pulp for papermaking.
Background
The prehydrolysis is a process of pretreating the cellulose raw material with water, steam or dilute acid in a closed container at a certain temperature and pressure before cooking in pulping. All are carried out under acidic conditions, such as hydrolysis with water or steam, the acidity of which is caused by organic acids generated during hydrolysis, also known as acid hydrolysis.
The paper pulp is a fibrous substance prepared by using plant fibers as raw materials through different processing methods. The quality of the pulp is mainly determined by its fiber morphology and the degree of purity of the fibers; refined pulp is often used as a raw material for producing cellulose derivatives such as cellulose esters and cellulose ethers, in addition to specialty paper. The performance indexes of the paper pulp are many, and the paper pulp can be divided into two main categories of physical and chemical properties in summary; and may be classified into mechanical pulp, chemical pulp, and chemimechanical pulp according to the processing method.
Some technical solutions related to the production of pulp have been presented in the prior art, such as a chinese patent with application number 951913166, which discloses a method for producing special pulp from lignocellulose-containing material, resulting in a lower residual lignin concentration while maintaining excellent pulp quality, and at the same time improving the energy economy of the method, but the produced pulp has a higher water content as the conventional pulp and can freeze in winter, thereby affecting the drying and storage of the pulp.
Disclosure of Invention
In order to make up for the defects of the prior art, the invention provides the production method of the prehydrolysis paper pulp for papermaking, the drying device used in the method is used for baking the water-containing paper pulp by using the heating net and then drying the paper pulp, and then pressing the paper pulp into the paper cake by using the pressing disc for storage, the mechanization degree of the whole process is high, the problem that the paper pulp is frozen and hardened is solved, and the paper pulp is changed into the dried paper cake so as to be convenient for storage.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a production method of prehydrolysis paper pulp for papermaking, which comprises the following steps:
s1: selecting a raw material tree for papermaking, putting the raw material tree into a reaction container for prehydrolysis, washing the raw material tree after the prehydrolysis is finished to obtain a raw material I, hydrolyzing hemicellulose in the raw material in advance to be dissolved out, improving the content of alpha-cellulose in pulp, dissolving out part of lignin, softening a fiber structure, enabling the cooking of the next process to be more uniform, damaging primary cell walls of fibers and enabling the primary cell walls to fall off during the cooking, thereby improving the reaction performance of the pulp, generating a large amount of reducing sugar, furfural and the like in hydrolysis waste liquid, and being beneficial to centralized recovery and utilization;
s2: crushing the raw material I in the step S1 by using a crusher to obtain small raw materials, and putting the small raw materials into a cooking pot for cooking to obtain wood pulp;
s3: washing, bleaching and concentrating the wood pulp in the S2 to obtain concentrated paper pulp, putting the concentrated paper pulp into a storage box of a drying device, drying the paper pulp by using a heating net on a slide way, pressing the dried paper pulp into a disk-shaped paper cake by using a pressure plate, stacking and storing the paper cake, baking the water-containing paper pulp by using the heating net to dry, driving the dried paper pulp into a circular ring by using air blown out by an air compressor, and pressing the paper pulp into the paper cake by using the pressure plate for storage, wherein the mechanization degree of the whole process is high, the problem that the paper pulp is frozen and hardened is solved, so that the paper pulp is changed into the dried paper cake to be convenient for storage;
wherein, the drying device used in S3 comprises a bottom plate, two supporting frames are fixed on the top end of the bottom plate, a slide way is fixed on the top end of the supporting frames, a semicircular groove is arranged on one side of the slide way away from the adjacent supporting frames, a heating net is arranged in the semicircular groove, a first plate is fixed on the top end of the slide way, a second plate is fixed between the first plates, a first push rod motor is fixed on the bottom end of the second plate, two material storage boxes are fixed on the top end of the first plate, electromagnetic valves are fixed on the bottom ends of the material storage boxes, an air compressor is arranged on the bottom plate, two air pipes are arranged at the output port of the air compressor, more than two spray heads are arranged on one side of the supporting frames away from the first push rod motor along the length direction of the side of the supporting frames, the spray heads are respectively communicated with, a circular ring is fixed at the bottom end of the slide way, a pressure plate is rotatably installed at the bottom end of the first push rod motor, the pressure plate is in clearance fit with the inner side wall of the circular ring, a second push rod motor is fixedly installed at one side, away from the first push rod motor, of the support frame, a connecting frame is fixed at the output shaft end of the second push rod motor, a moving disc is movably installed at the bottom end of the circular ring, the moving direction of the moving disc is consistent with the stroke direction of the second push rod motor, one end, away from the second push rod motor, of the connecting frame is fixed on the side wall of the moving disc, a controller is arranged on the bottom plate and is used for controlling; when the method is used, the temperature is cold in winter, so that the prepared paper pulp is hard and is difficult to prepare into dry pulp sheets, and the production efficiency of the paper pulp is further influenced, and the method solves the problem; placing the paper pulp hardened by freezing into a storage box, and enabling the paper pulp to fall into a semicircular groove on a slide way under the control of a gap of an electromagnetic valve, wherein the paper pulp moves downwards in the semicircular groove along the length direction of the semicircular groove; the heating net in the semicircular groove heats the paper pulp in the moving process of the paper pulp, so that the paper pulp is heated and melted, and the water in the paper pulp is evaporated 3 and becomes dry; meanwhile, air blown out by the air compressor is changed into hot air after passing through the heating net, and the drying speed of the paper pulp is accelerated when the hot air is contacted with the paper pulp; when the paper pulp moves to the position, close to the circular ring, of the semicircular groove, the paper pulp is driven by hot air to enter the circular ring, then the first push rod motor drives the pressure plate to move downwards, the pressure plate, the circular ring and the moving plate form a closed space, and the paper pulp is compacted into dry disc-shaped paper pulp under the compression of the pressure plate; after the paper pulp is compacted, the second push rod motor drives the movable disc to move, so that the bottom end of the circular ring is empty, the first push rod motor drives the pressure disc to continuously extrude the disc-shaped paper pulp downwards, and finally the paper pulp falls from the circular ring; after the first push rod motor drives the pressure plate to return to the initial position, the electromagnetic valve controls the untreated paper pulp in the storage box to continuously fall, and the whole drying process is circularly repeated; according to the invention, the water-containing paper pulp is dried after being baked by the heating net, and then is pressed into the paper cake by the pressure plate for storage, so that the whole process has high degree of mechanization, the problem that the paper pulp is frozen and hardened is solved, and the paper pulp is changed into the dried paper cake so as to be convenient for storage; the pulp that has caked and hardened before being placed in the storage tank needs to be broken into small pieces to prevent the hardened pulp from falling out of the storage tank.
Preferably, more than two baffles are arranged on the inner side of the semicircular groove along the length direction of the semicircular groove, the baffles are used for dewatering paper pulp, and more than two water leakage holes are arranged at the bottom of the inner side of the semicircular groove; when the paper pulp drying machine is used, paper pulp is quickly melted under the action of the heating net, and the melted paper pulp also carries a large amount of moisture, so that the paper pulp is not easy to dry; the baffle plate is arranged, so that the paper pulp falls off from the baffle plate after moving to the edge of the baffle plate, the paper pulp is molten and accelerated due to the collision generated when the paper pulp contacts with the slide way in the falling process, and meanwhile, the molten water in the paper pulp is separated from the paper pulp under the action of inertia, so that the drying speed of the paper pulp is accelerated, and the production efficiency of the paper pulp is improved; the water after melting enters into the water leakage hole and drops from the slide way, so that the heat loss of the heating net is reduced, and the drying efficiency of the paper pulp is ensured.
Preferably, the air flow speed at the spray head close to the circular ring is higher than that at the spray head far away from the circular ring, the baffle is of a triangular structure, and the spray head is opposite to the bottom of the baffle; when the paper pulp drying machine is used, the air flow speed of the spray head close to the circular ring is high, so that paper pulp is blown up and falls into the circular ring, and smooth drying of the paper pulp is guaranteed; the spray head faces the bottom of the baffle plate, so that air at the spray head moves along the slide way, the contact degree of hot air and paper pulp is improved, and the drying speed of the paper pulp is further improved; meanwhile, air sprayed from the spray head drives the paper pulp to move downwards, so that the problem of uneven thickness of the paper cake caused by the blocked movement of the paper pulp is avoided, and the production quality of the paper cake is ensured.
Preferably, a cylinder is arranged on the side wall of the first push rod motor, a spiral groove is formed in the side wall of the cylinder, two rectangular plates are arranged at the top end of the pressure plate, a round ball is arranged on one side, facing the cylinder, of each rectangular plate, and the round ball is installed in the spiral groove; when the paper cake forming machine is used, paper pulp in the circular ring is dry floccule, and the paper pulp is unevenly distributed in the circular ring, so that the forming of a paper cake is influenced; the spiral groove is arranged, so that the rectangular plate on the pressure plate is driven to move downwards in the process that the output shaft end of the first push rod motor moves downwards, and the ball on the rectangular plate rotates in the spiral groove; the ball makes the pressure disk produce the rotation when rotatory, and the pivoted pressure disk is adjusted the paper pulp in the ring for paper pulp is in even state of spreading out, thereby has guaranteed the even uniformity of paper cake, and then has guaranteed the production quality of paper cake.
Preferably, the bottom end of the pressure plate is provided with an accommodating groove, a sweeping plate is hinged to the accommodating groove and used for sweeping paper pulp; when the paper pulp cleaner is used, the sweeping plate sweeps the paper pulp in the process of rotating along with the pressing disc, so that the paper pulp is swept flat quickly, and the uniformity and consistency of the paper pulp are improved; the pressure that makes the sweep board receive increases after paper pulp is pressed more and more compacter to make and sweep the board and get into and receive the groove, avoided sweeping the board and removed the in-process and cause drying and influence to the paper cake, guaranteed the surfacing of paper cake.
Preferably, the bottom end of the sweeping plate is provided with more than two sweeping teeth along the length direction of the sweeping plate, the sweeping teeth are of a semicircular structure, the total weight of the sweeping teeth is greater than that of the sweeping plate, and the distance between the sweeping teeth is 2-4 cm; when the paper pulp cleaner is used, the resistance borne by the sweeping plate in the paper pulp sweeping process is reduced due to the arrangement of the sweeping teeth, so that the rotating angle of the sweeping plate is reduced, the uniform dispersion degree of paper pulp in the sweeping process of the sweeping plate is ensured, and the production quality of the paper pulp is improved; the sweeping plate can be freely ejected when the sweeping teeth are large in mass, so that the pressure plate and the paper cake are separated, the normal use of the sweeping plate is guaranteed, the sweeping efficiency of the sweeping plate is also improved, and the situation that paper pulp cannot be driven to move due to the fact that the sweeping plate is light is avoided.
The invention has the following beneficial effects:
1. according to the production method of the prehydrolysis paper pulp for papermaking, the drying device used in the method dries the water-containing paper pulp after being baked by using the heating net, and then presses the paper pulp into the paper cake by using the pressing disc for storage, the whole process has high degree of mechanization, the problem that the paper pulp is frozen and hardened is solved, and the paper pulp is changed into the dried paper cake so as to be convenient for storage.
2. According to the production method of the prehydrolysis paper pulp for papermaking, the drying device used in the method drives the sweeping plate to rotate in the process of rotating the pressing plate, so that the paper pulp in the circular ring is ensured to be in a flat state, and the production quality of the paper pulp is further ensured.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a flow chart of the present invention;
FIG. 2 is a three-dimensional view of a drying apparatus used in the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
FIG. 4 is a schematic view of the positional relationship of the baffle and the chute;
FIG. 5 is a schematic view showing a positional relationship between a platen and a platen;
in the figure: the device comprises a bottom plate 1, a support frame 2, a slide rail 3, a semicircular groove 4, a first plate 5, a second plate 6, a first push rod motor 7, a storage box 8, an electromagnetic valve 9, an air compressor 10, an air pipe 11, a spray head 12, a circular ring 13, a pressure plate 14, a second push rod motor 15, a connecting frame 16, a moving plate 17, a baffle plate 18, a water leakage hole 19, a cylinder 20, a spiral groove 21, a rectangular plate 22, a storage groove 23, a sweeping plate 24 and a sweeping tooth 25.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 5, the method for producing prehydrolyzed pulp for papermaking according to the present invention comprises the following steps:
s1: selecting a raw material tree for papermaking, putting the raw material tree into a reaction container for prehydrolysis, washing the raw material tree after the prehydrolysis is finished to obtain a raw material I, hydrolyzing hemicellulose in the raw material in advance to be dissolved out, improving the content of alpha-cellulose in pulp, dissolving out part of lignin, softening a fiber structure, enabling the cooking of the next process to be more uniform, damaging primary cell walls of fibers and enabling the primary cell walls to fall off during the cooking, thereby improving the reaction performance of the pulp, generating a large amount of reducing sugar, furfural and the like in hydrolysis waste liquid, and being beneficial to centralized recovery and utilization;
s2: crushing the raw material I in the step S1 by using a crusher to obtain small raw materials, and putting the small raw materials into a cooking pot for cooking to obtain wood pulp;
s3: washing, bleaching and concentrating the wood pulp in the S2 to obtain concentrated paper pulp, putting the concentrated paper pulp into a storage box 8 of a drying device, drying the paper pulp by using a heating net on a slideway 3, pressing the dried paper pulp into a disk-shaped paper cake by using a pressure plate 14, stacking and storing the paper cake, baking the water-containing paper pulp by using the heating net to dry, driving the dried paper pulp into a circular ring by using air blown out by an air compressor, and pressing the paper pulp into the paper cake by using the pressure plate for storage, wherein the mechanization degree of the whole process is high, the problem that the paper pulp is frozen and hardened is solved, so that the paper pulp becomes the dried paper cake to be convenient for storage;
wherein, the drying device used in S3 comprises a bottom plate 1, two support frames 2 are fixed on the top of the bottom plate 1, a slide way 3 is fixed on the top of each support frame 2, a semicircular groove 4 is arranged on one side of each slide way 3 far away from the adjacent support frame 2, a heating net is arranged in each semicircular groove 4, a first plate 5 is fixed on the top of each slide way 3, a second plate 6 is fixed between the first plates 5, a first push rod motor 7 is fixed at the bottom end of each second plate 6, two storage boxes 8 are fixed at the top ends of the first plates 5, an electromagnetic valve 9 is fixed at the bottom end of each storage box 8, an air compressor 10 is arranged on the bottom plate 1, two air pipes 11 are arranged at the output port of the air compressor 10, more than two spray heads 12 are arranged on one side of each support frame 2 far away from the first push rod motor 7 along the length direction of the support frame, the drying device is characterized in that more than two nozzles are arranged on the slide rail 3, the spray head 12 is installed at the nozzles, a ring 13 is fixed at the bottom end of the slide rail 3, a pressure plate 14 is rotatably installed at the bottom end of the first push rod motor 7, the pressure plate 14 is in clearance fit with the inner side wall of the ring 13, a second push rod motor 15 is fixedly installed on one side, away from the first push rod motor 7, of the support frame 2, a connecting frame 16 is fixed at the output shaft end of the second push rod motor 15, a moving plate 17 is movably installed at the bottom end of the ring 13, the moving direction of the moving plate 17 is consistent with the stroke direction of the second push rod motor 15, one end, away from the second push rod motor 15, of the connecting frame 16 is fixed on the side wall of the moving plate 17, a controller is arranged; when the method is used, the temperature is cold in winter, so that the prepared paper pulp is hard and is difficult to prepare into dry pulp sheets, and the production efficiency of the paper pulp is further influenced, and the method solves the problem; placing the paper pulp hardened by freezing into a storage box 8, dropping the paper pulp into the semicircular groove 4 on the slideway 3 under the gap control of an electromagnetic valve 9, and moving the paper pulp downwards in the semicircular groove 4 along the length direction of the semicircular groove 4; the heating net in the semicircular groove 4 heats the paper pulp in the moving process of the paper pulp, so that the paper pulp is heated and melted, and the water in the paper pulp is evaporated 3 and becomes dry; meanwhile, air blown out by the air compressor 10 is changed into hot air after passing through the heating net, and the drying speed of the paper pulp is accelerated when the hot air is in contact with the paper pulp; when the paper pulp moves to the position of the semicircular groove 4 close to the circular ring 13, the paper pulp is driven by hot air to enter the circular ring 13, then the first push rod motor 7 drives the pressure plate 14 to move downwards, the pressure plate 14, the circular ring 13 and the moving plate 17 form a closed space, and the paper pulp is compacted into dry disc-shaped paper pulp under the compression of the pressure plate 14; after the paper pulp is compacted, the second push rod motor 15 drives the moving disc 17 to move, so that the bottom end of the circular ring 13 is empty, the first push rod motor 7 drives the pressure plate 14 to continuously extrude the disc-shaped paper pulp downwards, and finally the paper pulp falls from the circular ring 13; after the push rod motor 7 drives the pressure plate 14 to return to the initial position, the electromagnetic valve 9 controls the untreated paper pulp in the material storage box 8 to continuously fall, and the whole drying process is circularly repeated; according to the invention, the water-containing paper pulp is dried after being baked by the heating net, and then is pressed into the paper cake by the pressure plate 14 for storage, so that the whole process has high degree of mechanization, the problem that the paper pulp is frozen and hardened is solved, and the paper pulp is changed into the dried paper cake so as to be convenient for storage; the pulp that has been caked and hardened before being placed in the storage tank 8 needs to be broken into small pieces to prevent the pulp from hardening and failing to fall out of the storage tank 8.
In one embodiment of the present invention, two or more baffles 18 are disposed along the length direction inside the semicircular groove 4, the baffles 18 are used for dewatering the pulp, and two or more water leakage holes 19 are disposed at the bottom inside the semicircular groove 4; when the paper pulp drying machine is used, paper pulp is quickly melted under the action of the heating net, and the melted paper pulp also carries a large amount of moisture, so that the paper pulp is not easy to dry; the baffle plate 18 is arranged, so that the paper pulp falls off from the baffle plate 18 after moving to the edge of the baffle plate 18, the paper pulp is molten and accelerated due to the collision generated when the paper pulp contacts the slide rail 3 in the falling process, and meanwhile, the molten water in the paper pulp is separated from the paper pulp under the action of inertia, so that the drying speed of the paper pulp is accelerated, and the production efficiency of the paper pulp is improved; the melted water enters the water leakage holes 19 and falls from the slide way 3, so that the heat loss of the heating net is reduced, and the drying efficiency of the paper pulp is ensured.
As a specific embodiment of the invention, the air flow speed at the spray head 12 close to the circular ring 13 is higher than that at the spray head 12 far away from the circular ring 13, the baffle plate 18 is in a triangular structure, and the spray head 12 is opposite to the bottom of the baffle plate 18; when in use, the air flow velocity of the spray head 12 close to the circular ring 13 is high, so that the paper pulp is blown up and falls into the circular ring 13, and the smooth drying of the paper pulp is ensured; the spray head 12 faces the bottom of the baffle 18, so that air at the spray head 12 moves along the slide way 3, the contact degree of hot air and paper pulp is improved, and the drying speed of the paper pulp is further improved; meanwhile, the air sprayed from the spray head 12 drives the paper pulp to move downwards, so that the problem of uneven thickness of the paper cake caused by the blocked movement of the paper pulp is avoided, and the production quality of the paper cake is ensured.
As a specific embodiment of the present invention, a cylinder 20 is disposed on a side wall of the first push rod motor 7, a spiral groove 21 is disposed on a side wall of the cylinder 20, two rectangular plates 22 are disposed at a top end of the pressure plate 14, and a round ball is disposed on one side of the rectangular plate 22 facing the cylinder 20 and is installed in the spiral groove 21; when the paper cake forming machine is used, paper pulp in the circular ring 13 is dry floccule, and the paper pulp is unevenly distributed in the circular ring 13, so that the forming of a paper cake is influenced; by arranging the spiral groove 21, the rectangular plate 22 on the pressure plate 14 is driven to move downwards in the process that the output shaft end of the first push rod motor 7 moves downwards, so that the round balls on the rectangular plate 22 rotate in the spiral groove 21; the ball makes pressure disk 14 produce the rotation when rotatory, and pivoted pressure disk 14 adjusts the paper pulp in the ring 13 for paper pulp is in the state of evenly spreading, thereby has guaranteed the even uniformity of paper cake, and then has guaranteed the production quality of paper cake.
As a specific embodiment of the present invention, the bottom end of the pressure plate 14 is provided with a receiving groove 23, a sweeping plate 24 is hinged at the receiving groove 23, and the sweeping plate 24 is used for sweeping paper pulp; when in use, the sweeping plate 24 sweeps the paper pulp in the process of rotating along with the pressing plate 14, so that the paper pulp is swept flat quickly, and the uniformity of the paper pulp is improved; after the paper pulp is pressed more and more tightly, the pressure on the sweeping plate 24 is increased, so that the sweeping plate 24 enters the receiving groove 23, the drying and influence on the paper cake in the moving process of the sweeping plate 24 are avoided, and the surface smoothness of the paper cake is ensured.
As a specific embodiment of the present invention, the bottom end of the sweeping plate 24 is provided with more than two sweeping teeth 25 along the length direction thereof, the sweeping teeth 25 are in a semicircular structure, the total weight of the sweeping teeth 25 is greater than the weight of the sweeping plate 24, and the distance between the sweeping teeth 25 is 2-4 cm; when the paper pulp cleaner is used, the resistance borne by the sweeping plate 24 in the paper pulp sweeping process is reduced due to the arrangement of the sweeping teeth 25, so that the rotation angle of the sweeping plate 24 is reduced, the uniform dispersion degree of paper pulp in the sweeping process of the sweeping plate 24 is ensured, and the production quality of the paper pulp is improved; the sweeping teeth 25 are large in mass, so that the sweeping plate 24 can be freely ejected when the pressure plate 14 is separated from the paper cake, the normal use of the sweeping plate 24 is guaranteed, the sweeping efficiency of the sweeping plate 24 is improved, and the situation that paper pulp cannot be driven to move due to the fact that the sweeping plate 24 is light is avoided.
When the method is used, the temperature is cold in winter, so that the prepared paper pulp is hard and is difficult to prepare into dry pulp sheets, and the production efficiency of the paper pulp is further influenced, and the method solves the problem; placing the paper pulp hardened by freezing into a storage box 8, dropping the paper pulp into the semicircular groove 4 on the slideway 3 under the gap control of an electromagnetic valve 9, and moving the paper pulp downwards in the semicircular groove 4 along the length direction of the semicircular groove 4; the heating net in the semicircular groove 4 heats the paper pulp in the moving process of the paper pulp, so that the paper pulp is heated and melted, and the water in the paper pulp is evaporated 3 and becomes dry; meanwhile, air blown out by the air compressor 10 is changed into hot air after passing through the heating net, and the drying speed of the paper pulp is accelerated when the hot air is in contact with the paper pulp; when the paper pulp moves to the position of the semicircular groove 4 close to the circular ring 13, the paper pulp is driven by hot air to enter the circular ring 13, then the first push rod motor 7 drives the pressure plate 14 to move downwards, the pressure plate 14, the circular ring 13 and the moving plate 17 form a closed space, and the paper pulp is compacted into dry disc-shaped paper pulp under the compression of the pressure plate 14; after the paper pulp is compacted, the second push rod motor 15 drives the moving disc 17 to move, so that the bottom end of the circular ring 13 is empty, the first push rod motor 7 drives the pressure plate 14 to continuously extrude the disc-shaped paper pulp downwards, and finally the paper pulp falls from the circular ring 13; after the push rod motor 7 drives the pressure plate 14 to return to the initial position, the electromagnetic valve 9 controls the untreated paper pulp in the material storage box 8 to continuously fall, and the whole drying process is circularly repeated; according to the invention, the water-containing paper pulp is dried after being baked by the heating net, and then is pressed into the paper cake by the pressure plate 14 for storage, so that the whole process has high degree of mechanization, the problem that the paper pulp is frozen and hardened is solved, and the paper pulp is changed into the dried paper cake so as to be convenient for storage; the pulp that has been caked and hardened before being placed in the storage tank 8 needs to be broken into small pieces to prevent the pulp from hardening and failing to fall out of the storage tank 8.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. A method for producing prehydrolyzed pulp for papermaking is characterized by comprising the following steps of:
s1: selecting a raw material tree for papermaking, putting the raw material tree into a reaction container for prehydrolysis, and washing the raw material tree after the prehydrolysis is finished to obtain a first raw material;
s2: crushing the raw material I in the step S1 by using a crusher to obtain small raw materials, and putting the small raw materials into a cooking pot for cooking to obtain wood pulp;
s3: washing, bleaching and concentrating the wood pulp in the S2 to obtain concentrated paper pulp, putting the concentrated paper pulp into a storage box (8) of a drying device, drying the paper pulp by using a heating net on a slide way (3), pressing the dried paper pulp into a disc-shaped paper cake by using a pressure plate (14), and stacking and storing the paper cake;
wherein, drying device who uses among S3 includes bottom plate (1), bottom plate (1) top is fixed with two support frames (2), support frame (2) top is fixed with slide (3), one side that adjacent support frame (2) were kept away from in slide (3) is equipped with half slot (4), is equipped with the heating network in half slot (4), slide (3) top is fixed with one number board (5), be fixed with two number board (6) between one number board (5), two number board (6) bottom mounting have push rod motor (7), one number board (5) top is fixed with two storage tanks (8), storage tank (8) bottom mounting has solenoid valve (9), be equipped with air compressor (10) on bottom plate (1), the delivery outlet department of air compressor (10) is equipped with two trachea (11), one side that one number push rod motor (7) was kept away from in support frame (2) is equipped with shower nozzle (12) more than two along its length direction ) The spray head (12) is respectively communicated with the air pipe (11) through a rectangular shell, more than two nozzles are arranged on the slide way (3), the spray head (12) is arranged at the position of the nozzles, a circular ring (13) is fixedly arranged at the bottom end of the slide way (3), a pressure plate (14) is rotatably arranged at the bottom end of the push rod motor (7), a clearance fit is formed between the inner side walls of the pressure plate (14) and the circular ring (13), a second push rod motor (15) is fixedly arranged at one side, far away from the first push rod motor (7), of the support frame (2), a connecting frame (16) is fixedly arranged at the output shaft end of the second push rod motor (15), a movable plate (17) is movably arranged at the bottom end of the circular ring (13), the moving direction of the movable plate (17) is consistent with the stroke direction of the second push rod motor (15), one end, far away from the second push rod motor (15), of the connecting frame (16), and the bottom plate (1) is provided with a controller, and the controller is used for controlling the drying device to work.
2. The method of producing prehydrolyzed pulp for papermaking according to claim 1, wherein: more than two baffles (18) are arranged on the inner side of the semicircular groove (4) along the length direction of the semicircular groove, the baffles (18) are used for dewatering paper pulp, and more than two water leakage holes (19) are formed in the bottom of the inner side of the semicircular groove (4).
3. The method of producing prehydrolyzed pulp for papermaking according to claim 2, wherein: the air flow speed of the spray head (12) close to the circular ring (13) is higher than that of the spray head (12) far away from the circular ring (13), the baffle plate (18) is of a triangular structure, and the spray head (12) is opposite to the bottom of the baffle plate (18).
4. A method of producing prehydrolyzed pulp for papermaking according to claim 3, wherein: be equipped with drum (20) on the lateral wall of a push rod motor (7), be equipped with helicla flute (21) on the lateral wall of drum (20), pressure disk (14) top is equipped with two rectangular plate (22), one side that rectangular plate (22) orientation drum (20) is equipped with the ball, the ball is installed in helicla flute (21).
5. The method of producing prehydrolyzed pulp for papermaking according to claim 4, wherein: the paper pulp storage device is characterized in that a storage groove (23) is formed in the bottom end of the pressing plate (14), a sweeping plate (24) is hinged to the storage groove (23), and the sweeping plate (24) is used for sweeping the paper pulp.
6. The method of producing prehydrolyzed pulp for papermaking according to claim 5, wherein: sweep board (24) and be equipped with two or more for its length direction in the bottom and sweep tooth (25), it is semicircular structure to sweep tooth (25), sweep the weight sum of tooth (25) and be greater than the weight of sweeping board (24), it is 2-4cm to sweep the distance between the tooth (25).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010441700.XA CN111663351A (en) | 2020-05-22 | 2020-05-22 | Production method of prehydrolysis paper pulp for papermaking |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010441700.XA CN111663351A (en) | 2020-05-22 | 2020-05-22 | Production method of prehydrolysis paper pulp for papermaking |
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Citations (6)
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| JPH09234448A (en) * | 1996-02-28 | 1997-09-09 | Shinko Electric Co Ltd | Confidential document processing device |
| CN102493256A (en) * | 2011-12-07 | 2012-06-13 | 湖南骏泰浆纸有限责任公司 | Eucalyptus dissolving pulp and production method thereof |
| CN106881898A (en) * | 2017-03-09 | 2017-06-23 | 陈玉宝 | A kind of pressing device for edible oil |
| CN208949644U (en) * | 2018-08-29 | 2019-06-07 | 维达纸业（山东）有限公司 | A kind of paper grade (stock) paper Quick release device |
| CN210100796U (en) * | 2019-03-25 | 2020-02-21 | 湖南绿盛生物质能科技有限公司 | Straw particle briquetting device |
| CN113106770A (en) * | 2021-04-16 | 2021-07-13 | 罗秋 | Paper pulp extrusion auxiliary device capable of automatically adjusting height according to paper pulp amount |
-
2020
- 2020-05-22 CN CN202010441700.XA patent/CN111663351A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09234448A (en) * | 1996-02-28 | 1997-09-09 | Shinko Electric Co Ltd | Confidential document processing device |
| CN102493256A (en) * | 2011-12-07 | 2012-06-13 | 湖南骏泰浆纸有限责任公司 | Eucalyptus dissolving pulp and production method thereof |
| CN106881898A (en) * | 2017-03-09 | 2017-06-23 | 陈玉宝 | A kind of pressing device for edible oil |
| CN208949644U (en) * | 2018-08-29 | 2019-06-07 | 维达纸业（山东）有限公司 | A kind of paper grade (stock) paper Quick release device |
| CN210100796U (en) * | 2019-03-25 | 2020-02-21 | 湖南绿盛生物质能科技有限公司 | Straw particle briquetting device |
| CN113106770A (en) * | 2021-04-16 | 2021-07-13 | 罗秋 | Paper pulp extrusion auxiliary device capable of automatically adjusting height according to paper pulp amount |
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