CN112900129A - Production process of flame-retardant insulation impregnated base paper - Google Patents
Production process of flame-retardant insulation impregnated base paper Download PDFInfo
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- CN112900129A CN112900129A CN202110351516.0A CN202110351516A CN112900129A CN 112900129 A CN112900129 A CN 112900129A CN 202110351516 A CN202110351516 A CN 202110351516A CN 112900129 A CN112900129 A CN 112900129A
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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
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D1/00—Methods of beating or refining; Beaters of the Hollander type
- D21D1/20—Methods of refining
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F3/00—Press section of machines for making continuous webs of paper
- D21F3/02—Wet presses
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
- D21F5/02—Drying on cylinders
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
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Abstract
The invention discloses a production process of flame-retardant insulation impregnated base paper, which comprises a production system, wherein the production system comprises a hydrapulper, an inclined screen is arranged at the output end of the hydrapulper, a non-beating tank is arranged at the output end of the inclined screen, a first double-disc mill is arranged at the output end of the non-beating tank, a first conveying pump is arranged between the non-beating tank and the first double-disc mill, and a semi-pulp tank is arranged at the output end of the first double-disc mill. The flame-retardant insulation impregnated base paper produced by the process has the advantages of high mechanical strength, good insulation performance, uniform quantification, low density, good absorptivity, small impregnation shrinkage, difficulty in breaking and breaking, good impregnation processability, capability of being well suitable for processing and producing flame-retardant insulation paper, low beating degree pulping, low line pressure squeezing and calendaring processes, reduced motor power, low power consumption of unit product, high impregnation processing yield, reduced waste paper recycling consumption, energy conservation and environmental friendliness.
Description
Technical Field
The invention relates to the technical field of impregnation base paper production, in particular to a production process of flame-retardant insulation impregnation base paper.
Background
The flame-retardant insulating impregnated base paper is suitable for impregnation production and processing of flame-retardant insulating paper. The flame-retardant insulating paper is required to have not only high mechanical strength and good electrical properties but also good flame-retardant properties. Therefore, the impregnated base paper is required to have good electrical performance, uniform quantification, low density, good absorptivity and high loading rate of the flame retardant during impregnation, so that the insulation performance and the flame retardant performance of the impregnated product can be ensured.
The production process adopts unbleached sulfate wood pulp as raw material, and the unbleached sulfate wood pulp is manufactured through the procedures of paper shredding, high-beating degree pulping, round net forming, high-linear-pressure squeezing dewatering, drying, high-linear-pressure calendering and the like.
Therefore, it is necessary to develop a process for producing flame-retardant insulation base paper for impregnation to solve the above problems.
Disclosure of Invention
The invention aims to provide a production process of flame-retardant insulation impregnated base paper, the flame-retardant insulation impregnated base paper produced by the process has high mechanical strength, good insulation performance, uniform quantification, low density, good absorptivity, small impregnation shrinkage, difficulty in breaking and breaking, good impregnation processability, and good suitability for processing and production of flame-retardant insulation paper, and the processes of pulping with lower beating degree, low-line-pressure squeezing and calendaring are adopted, so that the power of a motor is reduced, the power consumption of a unit product is low, the finished product rate of impregnation processing is high, the waste paper recycling consumption is reduced, the energy is saved, the environment is protected, and the problems are solved.
In order to achieve the above purpose, the invention provides the following technical scheme: a production process of flame-retardant insulation impregnated base paper comprises a production system, wherein the production system comprises a hydrapulper, an inclined screen is arranged at the output end of the hydrapulper, a non-beating tank is arranged at the output end of the inclined screen, a first double-disc mill is arranged at the output end of the non-beating tank, a first conveying pump is arranged between the non-beating tank and the first double-disc mill, a half-pulp tank is arranged at the output end of the first double-disc mill, a second double-disc mill is arranged at the output end of the half-pulp tank, a second conveying pump is arranged between the half-pulp tank and the second double-disc mill, a pulping tank is arranged at the output end of the second double-disc mill, a first pulping front tank is arranged at the output end of the pulping tank, a third conveying pump is arranged between the pulping tank and the first pulping front tank, a second pulping front tank is arranged at the output end of the first pulping front tank, a flushing tank is arranged at the output end of the second pulping front tank, a flow meter is arranged between the pulp washing tank and the second fore-copying tank, a desander is arranged at the pulp washing tank and the output end, a pressure screen is arranged at the output end of the desander, a high-position pulp stabilizing box is arranged at the output end of the pressure screen, a rotary screen is arranged at the output end of the high-position pulp stabilizing box, a press box is arranged at the output end of the rotary screen, an oven is arranged at the output end of the press box, a first calender is arranged at the output end of the oven, a drying cylinder is arranged at the output end of the first calender, a second calender is arranged at the output end of the drying cylinder, a cold cylinder is arranged at the output end of the second calender, a winder is arranged at the output end of the cold;
the production process of the flame-retardant insulation impregnated base paper comprises the following steps:
the method comprises the following steps: crushing unbleached sulfate wood pulp into pulp in a hydraulic pulp crusher, obliquely dewatering, putting into an unbolted pulp tank, adjusting the pulp concentration to 4.0-4.5%, adding a dye according to a process formula, uniformly stirring, then adding unbolted base paper without color mixing, grinding into pulp with a first double-disc grinder by using a first conveying pump, grinding into pulp with the beating degree of 24-30 DEG SR and the wet weight of 14-18g, putting into semi-pulp, then pumping into a second double-disc grinder by using a second conveying pump for secondary grinding into pulp with the beating degree of 35-41 DEG SR, and putting into a pulp tank, and sending into a first pre-pulping tank by using a third conveying pump, wherein the wet weight of the pulp is 11.5-14.5 g;
step two: sending to a second front-end papermaking pond, adjusting the pulp concentration to 2.4-2.8%, metering by a flowmeter, flowing into a pulp flushing pond, adding paper machine white water to dilute the pulp-water mixture with the concentration of 0.5-0.9%, sending to a desander and a pressure screen, purifying, flowing into a high-level pulp stabilizing box, adding the white water to dilute into 0.3-0.4% pulp, and entering into a cylinder net;
step three: sizing, water filtering and forming uniformly on a net surface, dehydrating by the aid of a vacuum pump until the water content reaches 79-85%, adhering to felt to form a wet paper blank, further squeezing and dehydrating by a pressing box until the water content reaches 45-55%, forming a wet paper page with certain wet strength, entering an oven, drying and dehydrating by heat, controlling the temperature curve to be 65-110 ℃, the paper page water content to be 10-13%, entering a first calender for light pressure, then entering a drying cylinder, controlling the paper page water content to be 6-8%, entering a second calender for low-line pressure calendering, controlling the paper page surface density to be 0.9-1.0 g/cm 3, controlling the whole fixed quantity difference to be within 5g/m2, reeling by a cooling cylinder and a paper reeling cylinder, rewinding by a rewinder, inspecting finished products, packaging and warehousing.
Preferably, the fixedly connected with division board between the pressure incasement wall both sides, be provided with between division board top and the pressure incasement wall top and drive actuating cylinder, the quantity that drives actuating cylinder is provided with two, two it all runs through the division board and extends to the bottom to drive the actuating cylinder output, the division board is provided with the sealing washer with the junction of driving actuating cylinder output, the sealing washer is made by the silica gel material.
Preferably, movable grooves are formed in two sides of the inner wall of the pressing box, a first pressing plate is connected between the two movable grooves in a sliding mode, the top of the first pressing plate is matched with the output end of a driving air cylinder, a second pressing plate is arranged at the bottom of the first pressing plate, a reset spring is fixedly connected between the first pressing plate and the second pressing plate, and the number of the reset springs is multiple.
Preferably, first chutes are formed in two sides of the inner wall of the pressing box, first sliding plates and filter sieve plates are fixedly connected between the first sliding plates in a sliding mode, the tops of the filter sieve plates are fixedly connected with positioning baffles, and the tops of the positioning baffles correspond to the second pressing plates.
Preferably, press incasement wall both sides to all seted up the second spout, the inside sliding connection of second spout has the second slide, two fixedly connected with waste water tank between the second slide, waste water tank top both sides all are provided with the drainage plate, drainage plate and pressure case fixed connection, first spout, first slide, second spout and second slide cross sectional shape all establish to the T shape.
Preferably, the drying assembly is arranged inside the drying oven, the number of the drying assemblies is three, the drying assembly comprises a drying screen frame, first connecting plates are fixedly connected to two sides of the top of the drying screen frame, threaded holes are formed in the first connecting plates and two sides of the inside of the drying oven in a penetrating mode, the number of the threaded holes is three, and threaded rods are inserted into the threaded holes in a penetrating mode.
Preferably, stoving bank of screens top fixedly connected with second connecting plate, second connecting plate outer wall rotates through the pivot and is connected with the adjustable fender, adjustable fender bottom one side fixedly connected with third connecting plate, third connecting plate cross sectional shape establishes to L shape, the third connecting plate has all run through the card hole with stoving bank of screens inside, the inside grafting card pole that pegs graft of card hole, adjustable fender bottom fixedly connected with silica gel strip, stoving bank of screens bottom fixedly connected with waste liquid case.
In the technical scheme, the invention provides the following technical effects and advantages:
1. the flame-retardant insulation impregnated base paper produced by the process has the advantages of high mechanical strength, good insulation performance, uniform quantification, low density, good absorptivity, small impregnation shrinkage, difficulty in breaking and breaking, good impregnation processability and capability of being well suitable for processing and producing flame-retardant insulation paper;
2. the pulping process with lower beating degree, the low-line-pressure squeezing and calendaring process are adopted, the power of a motor is reduced, the power consumption of a unit product is low, the rate of finished products of dipping processing is high, the waste paper recycling consumption is reduced, the energy is saved, and the environment is protected.
Drawings
In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.
FIG. 1 is a schematic view of the overall process flow of the present invention;
FIG. 2 is a schematic view of the cross-sectional front view of the press box of the present invention;
FIG. 3 is a schematic view of the overall construction of the filter screen panel of the present invention;
FIG. 4 is an enlarged view of the structure at A in FIG. 2 according to the present invention;
FIG. 5 is a schematic structural view of a front cross section of the oven of the present invention;
FIG. 6 is a schematic view of an overall connection structure of the drying screen frame according to the present invention;
fig. 7 is an enlarged view of the structure at B in fig. 5 according to the present invention.
Description of reference numerals:
1. a production system; 2. a hydropulper; 3. screening obliquely; 4. the pulp tank is not knocked; 5. a first double disc grinder; 6. a semi-slurry tank; 7. a second double disc grinder; 8. a pulping tank; 9. a first pre-making pool; 10. a second pre-making pool; 11. a flow meter; 12. a pulp flushing pool; 13. a desander; 14. a pressure screen; 15. a high pulp stabilizing box; 16. a cylinder mould; 17. pressing the box; 18. an oven; 19. a first calender; 20. a drying cylinder; 21. a second calender; 22. cooling the cylinder; 23. a paper winder; 24. rewinding machine; 25. a partition plate; 26. a driving cylinder; 27. a first platen; 28. a movable groove; 29. a second platen; 30. a first chute; 31. a first slide plate; 32. filtering the sieve plate; 33. positioning a baffle plate; 34. a second chute; 35. a second slide plate; 36. a wastewater tank; 37. a drainage plate; 38. drying the screen frame; 39. a first connecting plate; 40. a threaded hole; 41. a threaded rod; 42. a second connecting plate; 43. a movable pressing plate; 44. a third connecting plate; 45. inserting a clamping rod; 46. a waste liquid tank.
Detailed Description
In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.
The invention provides a production process of flame-retardant insulation impregnated base paper as shown in figures 1-7, which comprises a production system 1, wherein the production system 1 comprises a hydrapulper 2, an inclined screen 3 is arranged at the output end of the hydrapulper 2, a non-beating tank 4 is arranged at the output end of the inclined screen 3, a first double disc mill 5 is arranged at the output end of the non-beating tank 4, a first delivery pump is arranged between the non-beating tank 4 and the first double disc mill 5, a half-pulp tank 6 is arranged at the output end of the first double disc mill 5, a second double disc mill 7 is arranged at the output end of the half-pulp tank 6, a second delivery pump is arranged between the half-pulp tank 6 and the second double disc mill 7, a pulp forming tank 8 is arranged at the output end of the second double disc mill 7, a first pulp making front tank 9 is arranged at the output end of the pulp forming tank 8, a third delivery pump is arranged between the pulp forming tank 8 and the first pulp making front tank 9, the output end of the first front-making pool 9 is provided with a second front-making pool 10, the output end of the second front-making pool 10 is provided with a pulp washing pool 12, a flowmeter 11 is arranged between the flushing tank 12 and the second foreturning tank 10, a sand remover 13 is arranged at the output end of the flushing tank 12, the output end of the sand remover 13 is provided with a pressure screen 14, the output end of the pressure screen 14 is provided with a high-level pulp stabilizing box 15, the output end of the high-level pulp stabilizing box 15 is provided with a circular screen 16, the output end of the circular screen 16 is provided with a pressing box 17, the output end of the pressing box 17 is provided with an oven 18, the output end of the oven 18 is provided with a first calender 19, the output end of the first calender 19 is provided with a drying cylinder 20, the output end of the drying cylinder 20 is provided with a second calender 21, the output end of the second calender 21 is provided with a cold cylinder 22, the output end of the cold cylinder 22 is provided with a winder 23, and the output end of the winder 23 is provided with a rewinder 24;
the production process of the flame-retardant insulation impregnated base paper comprises the following steps:
the method comprises the following steps: crushing unbleached sulfate wood pulp into pulp in a hydrapulper 2, dewatering by utilizing an inclined pump 3, putting the pulp into a non-beating pulp tank 4, adjusting the pulp concentration to be 4.0-4.5%, adding a dye according to a process formula, uniformly stirring, then not needing to mix colors with unbleached raw paper, grinding the unbleached raw paper into pulp by using a first conveying pump to a first double-disc mill 5, grinding the pulp into pulp with the beating degree of 24-30 DEG SR and the wet weight of 14-18g, putting half pulp 6 into a second double-disc mill 7, grinding the pulp with the beating degree of 35-41 DEG SR and the wet weight of 11.5-14.5g into pulp by using a second conveying pump, putting the pulp into a pulp tank 8, and sending a third conveying pump to a first pre-pulping tank 9;
step two: sending to a second front-end papermaking pond 10, adjusting the pulp concentration to 2.4-2.8%, metering by a flowmeter 11, flowing into a pulp flushing pond 12, adding a pulp water mixture diluted by paper machine white water to 0.5-0.9%, sending to a desander 13, a pressure screen 14, purifying, flowing into a high-level pulp stabilizing box 15, adding white water, diluting into 0.3-0.4% pulp, and entering a circular net 16;
step three: sizing, water filtering and forming uniformly on a net surface, dehydrating by the aid of a vacuum pump until the water content reaches 79-85%, adhering to felt to form a wet paper blank, further squeezing and dehydrating by a pressing box 17 until the water content reaches 45-55%, forming a wet paper page with certain wet strength, entering an oven 18 for thermal drying and dehydrating, controlling the temperature curve to be 65-110 ℃, the paper page water content to be 10-13%, entering a first calender 19 for light pressing, then entering a drying cylinder 20, enabling the paper page water content to reach 6-8%, entering a second calender 21 for low-line pressing and calendaring, controlling the paper page surface density to be 0.9-1.0 g/cm 3, controlling the whole fixed quantity difference to be within 5g/m2, rewinding by a cold cylinder 22, a paper rolling cylinder 23 and a rewinding machine 24, inspecting finished products, packaging and delivering to a factory.
Further, in the above scheme, a partition plate 25 is fixedly connected between two sides of the inner wall of the pressing box 17, a driving cylinder 26 is arranged between the top of the partition plate 25 and the top end of the inner wall of the pressing box 17, two driving cylinders 26 are provided, the output ends of the two driving cylinders 26 all penetrate through the partition plate 25 and extend to the bottom, a sealing ring is arranged at the joint of the partition plate 25 and the output end of the driving cylinder 26, the sealing ring is made of silica gel, in the further squeezing and dewatering process of the pressing box 17, wet paper blanks are placed on the top of the filtering sieve plate 32, the driving cylinder 26 is started, the driving cylinder 26 drives the first pressing plate 27 to slide and descend through the movable groove 28, and the second pressing plate 29 is further used for squeezing the wet paper blanks.
Further, in the above scheme, the two sides of the inner wall of the pressure box 17 are both provided with movable grooves 28, a first pressure plate 27 is slidably connected between the two movable grooves 28, the top of the first pressure plate 27 is matched with the output end of the driving cylinder 26, the bottom of the first pressure plate 27 is provided with a second pressure plate 29, a plurality of return springs are fixedly connected between the first pressure plate 27 and the second pressure plate 29, and the pressure of the second pressure plate 29 can be effectively controlled under the action of the return springs, so that the moisture content reaches 45-55%.
Further, in the above scheme, first sliding grooves 30 are formed in both sides of the inner wall of the pressing box 17, first sliding plates 31 are slidably connected inside the first sliding grooves 30, a filter sieve plate 32 is fixedly connected between the two first sliding plates 31, a positioning baffle 33 is fixedly connected to the top of the filter sieve plate 32, the top of the positioning baffle 33 corresponds to the second pressing plate 29, the driving cylinder 26 drives the first pressing plate 27 to slide and descend through the movable groove 28, and the second pressing plate 29 is further used for pressing the wet paper blanks.
Further, in the above scheme, second sliding grooves 34 have been all seted up to pressure box 17 inner wall both sides, the inside sliding connection of second sliding groove 34 has second slide 35, fixedly connected with waste water tank 36 between two second slide 35, waste water tank 36 top both sides all are provided with drainage plate 37, drainage plate 37 and pressure box 17 fixed connection, first sliding groove 30, first slide 31, second sliding groove 34 and second slide 35 cross-sectional shape all establish to the T shape, can slide filter sieve 32 and enter into inside first sliding groove 30 through first slide 31 to make filter sieve 32 slide to second clamp plate 29 bottom.
Further, in the above scheme, the drying assemblies are arranged inside the oven 18, the number of the drying assemblies is three, each drying assembly includes a drying screen frame 38, first connecting plates 39 are fixedly connected to two sides of the top of the drying screen frame 38, threaded holes 40 penetrate through the first connecting plates 39 and two sides of the inside of the oven 18, three threaded rods 41 are inserted into the three threaded holes 40, wastewater flows into the wastewater tank 36 through the drainage plate 37, the wastewater is pumped out of the second chute 34 for cleaning, and after squeezing and dewatering, when wet paper with certain wet strength enters the oven 18, the drying screen frame 38 can be fixed in position through the threaded rods 41.
Further, in the above solution, the top of the drying screen frame 38 is fixedly connected with a second connecting plate 42, the outer wall of the second connecting plate 42 is rotatably connected with a movable pressing plate 43 through a rotating shaft, one side of the bottom of the movable pressing plate 43 is fixedly connected with a third connecting plate 44, the cross section of the third connecting plate 44 is L-shaped, the third connecting plate 44 and the drying screen frame 38 are provided with clamping holes, an inserting clamping rod 45 is inserted in the clamping hole, the bottom of the movable pressing plate 43 is fixedly connected with a silica gel strip, the bottom of the drying sieve frame 38 is fixedly connected with a waste liquid box 46, the wet paper is placed at the top of the drying sieve frame 38, the movable pressing plate 43 is rotated to enable the silica gel strip to slightly press and fix the wet paper, the position of the movable pressing plate 43 is fixed by using the inserting clamping rod 45, thereby preventing shrinkage while drying, and water vapor can enter the waste liquid tank 46 for preservation.
The working principle of the invention is as follows:
referring to the attached figures 1-7 of the specification, when the device is used, firstly, sulfate wood pulp with natural color is crushed into pulp in a hydrapulper 2, the pulp is dewatered by an inclined screen 3 and then is put into a non-beating tank 4, the pulp concentration is adjusted to be 4.0-4.5%, dye is added according to the process formula and is stirred uniformly, then the base paper with natural color does not need to be toned, the base paper is sent to a first double-disc mill 5 by a first conveying pump to be ground into pulp, the pulp with beating degree of 24-30 DEG SR and wet weight of 14-18g is ground into pulp, the pulp is put into a half-pulp tank 6, then the pulp is sent to a second double-disc mill 7 by a second conveying pump to be ground into pulp with beating degree of 35-41 DEG SR, the pulp with wet weight of 11.5-14.5g is put into a pulp forming tank 8, a third conveying pump is sent to a first pre-papermaking tank 9 and is sent to a second pre-papermaking tank 10, the pulp concentration is adjusted to 2.4-2.8%, the pulp flows into a flushing tank 12 after being measured by a flowmeter 11, and is added with, sending to a desander 13 and a pressure screen 14 for purification, then flowing into a high-level pulp stabilizing box 15, adding white water to dilute into 0.3-0.4% pulp, entering a garden net l6, uniformly sizing, filtering, forming water on the net surface, dehydrating with the assistance of a vacuum pump until the water content reaches 79-85%, adhering to a felt to form a wet paper blank, further squeezing and dehydrating through a pressing box 17 until the water content reaches 45-55%, forming a wet paper with certain wet strength, entering an oven 18 for thermal drying and dehydrating, leading the temperature curve to be 65-110 ℃, leading the paper moisture to reach 10-13%, entering a first calender 19 for light pressure, then entering a drying cylinder 20 until the paper moisture reaches 6-8%, entering a second calender 21 for low-line pressure calendering, leading the paper surface density to be 0.9-1.0 g/3, controlling the whole width fixed quantity difference to be within 5g/m2, rewinding through a cold cylinder 22, a paper rolling cylinder 23 and a recoiling machine 24, inspecting, packaging and warehousing the finished product for delivery;
referring to the attached drawings 1-7 of the specification, when the device is used, firstly, in the process of further squeezing and dewatering through the pressing box 17, the filtering sieve plate 32 can slide into the first chute 30 through the first sliding plate 31, so that the filtering sieve plate 32 slides to the bottom of the second pressing plate 29, wet paper blanks are placed at the top of the filtering sieve plate 32, the driving cylinder 26 is started, the driving cylinder 26 drives the first pressing plate 27 to slide and descend through the movable groove 28, the second pressing plate 29 further presses the wet paper blanks, so that the pressure of the second pressing plate 29 can be effectively controlled under the action of the return spring, the water content reaches 45-55%, wastewater flows into the wastewater box 36 through the drainage plate 37, is extracted from the second chute 34 for cleaning, after dewatering, when wet paper sheets with certain wet strength enter the oven 18, the drying sieve frame 38 can be fixed in position through the threaded rod 41, place wet paper in stoving sieve frame 38 top, rotate movable clamp plate 43, make the silica gel strip carry out slight pressure to wet paper and fix, use grafting kelly 45 to carry out movable clamp plate 43's rigidity to avoid shrinking in the stoving, and vapor can enter into and preserve in waste liquid case 46.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.
Claims (7)
1. The production process of the flame-retardant insulation impregnated base paper comprises a production system (1), and is characterized in that: the production system (1) comprises a hydraulic pulper (2), an output end of the hydraulic pulper (2) is provided with an inclined screen (3), an output end of the inclined screen (3) is provided with a non-beating tank (4), an output end of the non-beating tank (4) is provided with a first double-disc mill (5), a first delivery pump is arranged between the non-beating tank (4) and the first double-disc mill (5), an output end of the first double-disc mill (5) is provided with a half-pulp tank (6), an output end of the half-pulp tank (6) is provided with a second double-disc mill (7), a second delivery pump is arranged between the half-pulp tank (6) and the second double-disc mill (7), an output end of the second double-disc mill (7) is provided with a pulp forming tank (8), an output end of the pulp forming tank (8) is provided with a first pulp making front tank (9), and a third delivery pump is arranged between the pulp forming tank (8) and the first pulp making front tank (9), a second pre-papermaking pool (10) is arranged at the output end of the first pre-papermaking pool (9), a washing pool (12) is arranged at the output end of the second pre-papermaking pool (10), a flow meter (11) is arranged between the washing pool (12) and the second pre-papermaking pool (10), a desander (13) is arranged at the output ends of the washing pool (12) and the second pre-papermaking pool, a pressure screen (14) is arranged at the output end of the desander (13), a high-position pulp stabilizing box (15) is arranged at the output end of the pressure screen (14), a circular screen (16) is arranged at the output end of the high-position pulp stabilizing box (15), a press box (17) is arranged at the output end of the circular screen (16), an oven (18) is arranged at the output end of the press box (17), a first calender (19) is arranged at the output end of the oven (18), a drying cylinder (20) is arranged at the output end of the first calender (19), a second calender (, a cold cylinder (22) is arranged at the output end of the second calender (21), a winder (23) is arranged at the output end of the cold cylinder (22), and a rewinder (24) is arranged at the output end of the winder (23);
the production process of the flame-retardant insulation impregnated base paper comprises the following steps:
the method comprises the following steps: crushing unbleached sulfate wood pulp into pulp in a hydrapulper (2), dewatering by utilizing an inclined pump (3), putting the pulp into an unbolted pulp tank (4), adjusting the pulp concentration to be 4.0-4.5%, adding a dye according to a process formula, uniformly stirring, then not mixing colors with unbleached raw paper, grinding the raw paper into pulp by using a first conveying pump to a first double-disc mill (5), grinding the pulp into pulp with the beating degree of 24-30 DEG SR and the wet weight of 14-18g, putting half pulp (6), then conveying the pulp into a second double-disc mill (7) by using a second conveying pump to perform secondary pulp grinding, grinding the pulp into pulp with the beating degree of 35-41 DEG SR, conveying the pulp with the wet weight of 11.5-14.5g into a pulp forming tank (8), and conveying the third conveying pump to a first pulp making front tank (9);
step two: sending the pulp to a second front-end papermaking pond (10), adjusting the pulp concentration to 2.4-2.8%, metering by a flowmeter (11), then flowing into a pulp flushing pond (12), adding paper machine white water to dilute the pulp-water mixture with the concentration of 0.5-0.9%, sending the pulp-water mixture to a sand remover (13) and a pressure screen (14), purifying the pulp-water mixture, then flowing into a high-level pulp stabilizing box (15), adding white water to dilute the pulp into 0.3-0.4%, and then entering a circular screen (16);
step three: sizing, water filtering and forming uniformly on a net surface, dehydrating by the aid of a vacuum pump until the water content reaches 79-85%, adhering the wet paper blank on a felt to form a wet paper blank, further squeezing and dehydrating by a pressing box (17) until the water content reaches 45-55%, forming a wet paper sheet with certain wet strength, feeding the wet paper sheet into an oven (18), drying and dehydrating by heat, wherein the temperature curve is 65-110 ℃, the water content of the paper sheet reaches 10-13%, feeding the paper sheet into a first calender (19) for light pressure, feeding the paper sheet into a drying cylinder (20), feeding the paper sheet with the water content of 6-8%, feeding the paper sheet into a second calender (21) for low-line pressure calendering, controlling the surface density of the paper sheet to be 0.9-1.0 g/3, controlling the whole-width quantitative difference to be within 5g/m2, reeling by a cooling cylinder (22), a paper rolling cylinder (23), a rewinder (.
2. The process for producing flame-retardant impregnating base paper for insulation according to claim 1, which is characterized in that: press fixedly connected with division board (25) between case (17) inner wall both sides, be provided with between division board (25) top and case (17) inner wall top and drive actuating cylinder (26), the quantity that drives actuating cylinder (26) is provided with two, two it all runs through division board (25) and extends to the bottom to drive actuating cylinder (26) output, division board (25) and drive actuating cylinder (26) output junction are provided with the sealing washer, the sealing washer is made by the silica gel material.
3. The process for producing flame-retardant impregnating base paper for insulation according to claim 1, which is characterized in that: pressure case (17) inner wall both sides have all been seted up movable groove (28), and sliding connection has first clamp plate (27) between two movable groove (28), first clamp plate (27) top with drive actuating cylinder (26) output phase-match, first clamp plate (27) bottom is provided with second clamp plate (29), fixedly connected with reset spring between first clamp plate (27) and second clamp plate (29), reset spring's quantity is provided with a plurality ofly.
4. The process for producing flame-retardant impregnating base paper for insulation according to claim 1, which is characterized in that: first spout (30) have all been seted up to pressure case (17) inner wall both sides, the inside sliding connection of first spout (30) has first slide (31), two fixedly connected with filters sieve (32) between first slide (31), filter sieve (32) top fixedly connected with positioning baffle (33), positioning baffle (33) top is corresponding with second clamp plate (29).
5. The process for producing flame-retardant impregnating base paper for insulation according to claim 1, which is characterized in that: press case (17) inner wall both sides to have all seted up second spout (34), second spout (34) inside sliding connection has second slide (35), two fixedly connected with waste water tank (36) between second slide (35), waste water tank (36) top both sides all are provided with drainage plate (37), drainage plate (37) and pressure case (17) fixed connection, first spout (30), first slide (31), second spout (34) and second slide (35) cross sectional shape all establish to the T shape.
6. The process for producing flame-retardant impregnating base paper for insulation according to claim 1, which is characterized in that: the drying device is characterized in that drying assemblies are arranged inside the drying oven (18), the number of the drying assemblies is three, each drying assembly comprises a drying screen frame (38), first connecting plates (39) are fixedly connected to two sides of the top of each drying screen frame (38), threaded holes (40) penetrate through the first connecting plates (39) and two sides of the inside of the drying oven (18), the number of the threaded holes (40) is three, and threaded rods (41) are inserted into the threaded holes (40).
7. The process for producing flame-retardant impregnating base paper for insulation according to claim 6, which is characterized in that: drying sieve frame (38) top fixedly connected with second connecting plate (42), second connecting plate (42) outer wall rotates through the pivot and is connected with movable pressing plate (43), movable pressing plate (43) bottom one side fixedly connected with third connecting plate (44), third connecting plate (44) cross sectional shape is established to L shape, third connecting plate (44) and drying sieve frame (38) inside all run through there is the card hole, the inside grafting kelly (45) of pegging graft of card hole, movable pressing plate (43) bottom fixedly connected with silica gel strip, drying sieve frame (38) bottom fixedly connected with waste liquid case (46).
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