CN112549282A - Production system and production method of high-density ceramic fiber board - Google Patents
Production system and production method of high-density ceramic fiber board Download PDFInfo
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- CN112549282A CN112549282A CN202011541051.7A CN202011541051A CN112549282A CN 112549282 A CN112549282 A CN 112549282A CN 202011541051 A CN202011541051 A CN 202011541051A CN 112549282 A CN112549282 A CN 112549282A
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- 239000000919 ceramic Substances 0.000 title claims abstract description 59
- 239000011094 fiberboard Substances 0.000 title claims abstract description 56
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 36
- 239000002002 slurry Substances 0.000 claims abstract description 60
- 238000004537 pulping Methods 0.000 claims abstract description 24
- 238000001035 drying Methods 0.000 claims abstract description 23
- 238000003825 pressing Methods 0.000 claims abstract description 16
- 239000000835 fiber Substances 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 238000002360 preparation method Methods 0.000 claims description 9
- 230000005484 gravity Effects 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 7
- 238000009826 distribution Methods 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 5
- 230000007246 mechanism Effects 0.000 claims description 5
- 229920000728 polyester Polymers 0.000 claims description 4
- 239000002893 slag Substances 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 claims description 2
- 230000006835 compression Effects 0.000 abstract description 14
- 238000007906 compression Methods 0.000 abstract description 14
- 238000000034 method Methods 0.000 abstract description 12
- 238000010924 continuous production Methods 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 7
- 238000003860 storage Methods 0.000 abstract description 6
- 241000519995 Stachys sylvatica Species 0.000 abstract description 4
- 239000012467 final product Substances 0.000 abstract description 4
- 235000009161 Espostoa lanata Nutrition 0.000 abstract description 2
- 240000001624 Espostoa lanata Species 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 abstract description 2
- 101100356682 Caenorhabditis elegans rho-1 gene Proteins 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 6
- 239000000047 product Substances 0.000 description 5
- 238000000465 moulding Methods 0.000 description 4
- 230000007306 turnover Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
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- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B15/00—General arrangement or layout of plant ; Industrial outlines or plant installations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/52—Producing shaped prefabricated articles from the material specially adapted for producing articles from mixtures containing fibres, e.g. asbestos cement
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Abstract
The invention discloses a production system of a high-density ceramic fiber board, which comprises: a pulping and pulp mixing system; the fourdrinier forming machine is used for forming wet blanks; the hydraulic press is used for pressing and dehydrating the wet blank; and the curing oven is used for drying the wet blank. In the invention, the high-density ceramic fiber board can be obtained by sequentially carrying out the process flows of preparing slurry, forming a wet blank, pressing and dehydrating the wet blank and drying the wet blank. Therefore, the production system of the high-density ceramic fiber board can realize the intelligent continuous production of the high-density ceramic fiber board, thereby reducing the amount of manual labor and improving the production efficiency. In addition, the pulp blending pool is directly connected with the elevated tank, so that a pulp storage pool is omitted, the phenomenon that a large number of cotton ball white spots appear on the surface of a wet blank due to the fact that fibers are not dispersed is avoided, and the reduction of the compression strength of a final product is avoided. The invention also discloses a production method of the high-density ceramic fiber board.
Description
Technical Field
The invention relates to the technical field of high-density ceramic fiber boards, in particular to a production system and a production method of a high-density ceramic fiber board.
Background
In the production of the high-density ceramic fiber board, the steps of pulping, slurry preparation, forming, pressing, drying and the like are required. In the prior art, the intelligent continuous production of the high-density ceramic fiber board cannot be realized, so that the production efficiency is low and the labor amount is large.
Disclosure of Invention
The invention aims to realize the intelligent continuous production of the high-density ceramic fiber board. In order to achieve the purpose, the invention provides the following technical scheme:
a system for producing high density ceramic fiber board, comprising:
a pulping and pulp mixing system;
the long net forming machine is used for forming a wet blank, and the slurry prepared by the slurry preparing and distributing system enters the long net forming machine under the action of gravity;
the hydraulic press is positioned at the downstream of the fourdrinier wire forming machine, a first conveying roller is arranged between the fourdrinier wire forming machine and the hydraulic press, the first conveying roller is used for conveying the wet blank to the hydraulic press, and the hydraulic press is used for pressing and dehydrating the wet blank;
and the curing oven is positioned at the downstream of the hydraulic press and used for drying the wet blank, a second conveying roller is arranged between the hydraulic press and the curing oven, and the conveying roller is used for conveying the wet blank to the curing oven.
Preferably, the hydraulic machine comprises:
a piston;
go up the mould suction box, go up the mould suction box with piston connection, it has last mould flat board to go up the mould suction box, it is used for the extrusion to go up the mould flat board wet base, just go up and be provided with the water hole on the mould flat board, go up the water hole with go up the inside intercommunication of mould suction box
A frame;
the lower mould suction box, the lower mould suction box sets up the frame, just the lower mould suction box is located go up the below of mould suction box, the lower mould suction box has the lower mould flat board, be provided with down the water hole on the lower mould flat board, down the water hole with the inside intercommunication of lower mould suction box.
Preferably, the upper die suction box and the lower die suction box are both communicated with a vacuum pump through vacuum pipes.
Preferably, the hydraulic machine further comprises a travel switch for defining the range of movement of the piston.
Preferably, the hydraulic press still includes an upper fixed plate, an upper die plate and a guide post, it connects to go up the mould suction box on the upper die plate, the upper end of guide post links firmly on the upper fixed plate, the lower extreme of guide post links firmly in the frame, the guide post runs through the upper die plate, set up on the upper die plate with the guiding hole of guide post adaptation.
Preferably, the hydraulic press further comprises a conveying mesh belt, wherein the inlet end of the conveying mesh belt is communicated with the first conveying roller, and the outlet end of the conveying mesh belt is communicated with the second conveying roller.
Preferably, the conveying mesh belt is an endless polyester drying mesh belt, the conveying mesh belt is tensioned by a tensioning roller, and the tensioning roller is driven by a motor.
Preferably, the pulping and pulp preparing system comprises: the pulping machine comprises a pulping machine, a pulp distribution pool and a high-level groove, wherein the pulping machine is communicated with the pulp distribution pool through a first pipeline, a first pulp conveying pump is arranged in the first pipeline, the pulp distribution pool is communicated with the high-level groove through a second pipeline, a second pulp conveying pump is arranged in the second pipeline, the high-level groove is communicated with the fourdrinier forming machine through a third pipeline, and the third pipeline is vertically arranged.
Preferably, a slag remover is further arranged in the second pipeline.
Preferably, the production system further comprises a post-processing system comprising: slitting machine, steering mechanism, crosscut machine, hacking machine.
The invention also discloses a production method of the high-density ceramic fiber board, and the production system based on the high-density ceramic fiber board comprises the following steps:
s1: preparing slurry;
s2: feeding the slurry into the fourdrinier forming machine under the action of gravity, and making the slurry into a wet blank by the fourdrinier forming machine;
s3: the wet blanks are conveyed to the conveying mesh belt through the first conveying roller, the wet blanks are pressed and dehydrated by the hydraulic machine, and then the wet blanks are conveyed to the second conveying roller by the conveying mesh belt;
s4: and the wet blank is conveyed to the curing oven by the second conveying roller, and the wet blank is dried by the curing oven.
Preferably, the step S1 specifically includes:
s11: making slurry by using the pulping machine;
s12: preparing slurry by using the slurry preparation tank;
s13: and conveying the slurry to a high-level tank after deslagging.
Preferably, the height difference between the discharge hole of the elevated tank and the feed inlet of the fourdrinier forming machine is H1, the distance between the liquid level in the elevated tank and the discharge hole of the elevated tank is H2, and H2 is more than or equal to 0.6H1 and less than or equal to H2 and less than or equal to H1.
Preferably, the wet blank thickness of the wet blank prepared in the step S2 is H, the wet blank density is ρ 1, and the wet blank water content is w 1;
the wet blank thickness of the wet blank pressed and dehydrated by the hydraulic press in the step S3 is h, the density of the wet blank is rho 2, and the moisture content of the wet blank is w 2;
and H ═ H (0.6 to 0.7) H, w2 ═ (0.8 to 0.9) w1, ρ 1 ═ H ═ ρ 2 ═ H.
Preferably, the drying of the wet blank by the curing oven in step S4 includes accelerated drying, uniform drying, and decelerated drying.
According to the technical scheme, the beneficial effects of the invention mainly comprise the following points:
1. the slurry preparing and distributing system, the fourdrinier forming machine, the hydraulic machine and the curing furnace are arranged, and the turnover of wet blanks is realized through the first conveying roller and the second conveying roller, so that the intelligent continuous production of the high-density ceramic fiber board is realized.
2. The pulp distribution tank is directly connected with the elevated tank, and a pulp storage tank is omitted, so that the occurrence of fiber precipitation is avoided, the phenomenon that fibers are dispersed and cannot be opened, a large number of white spots of cotton balls appear on the surface of a wet blank is avoided, and the reduction of the compressive strength of a final product is avoided.
3. The height H2 between the liquid level of the elevated tank and the discharge hole thereof and the height difference H1 between the discharge hole of the elevated tank and the feed hole of the fourdrinier forming machine satisfy a certain relationship, thereby ensuring the stable slurry blanking and realizing the continuous production.
4. The wet blank thickness of the wet blank manufactured and molded by the fourdrinier molding machine is H, the wet blank density is rho 1, the wet blank water content is w1, the wet blank thickness of the wet blank pressed and dehydrated by the hydraulic press is H, the wet blank density is rho 2, and the wet blank water content is w2, so that the wet blank pressing and molding machine has a good pressing and molding effect, the wet blank does not crack, and no crack is produced during drying.
5. The hydraulic machine is provided with a travel switch to control the compression amount of the hydraulic machine, and the hydraulic machine is also provided with a guide column to ensure that the piston moves linearly and the compression quality is ensured.
6. The conveying mesh belt of the hydraulic press can realize the transmission of the wet blanks on the hydraulic press so as to realize the automatic turnover of the wet blanks.
Drawings
In order to more clearly illustrate the solution of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without inventive efforts.
FIG. 1 is a schematic diagram of a system for producing a high density ceramic fiberboard, according to one embodiment of the present invention;
fig. 2 is a schematic mechanism diagram of a hydraulic machine according to an embodiment of the present invention.
Wherein, 1 is a hydraulic press, 11 is an upper die suction box, 12 is a lower die suction box, 13 is a vacuum tube, 14 is a piston, 15 is an upper die plate, 16 is a guide post, and 17 is an upper fixing plate.
Detailed Description
The invention discloses a production system of a high-density ceramic fiber board, which can realize the intelligent continuous production of the high-density ceramic fiber board. The invention also discloses a production method of the high-density ceramic fiber board.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, the terms "upper", "lower", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention but do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
The production system of the high-density ceramic fiber board comprises: a pulping and slurry-distributing system, a fourdrinier forming machine, a hydraulic press and a curing oven. Wherein, the pulping and pulp preparing system is used for preparing the pulp. The fourdrinier forming machine is positioned at the downstream of the pulping and pulp-distributing system and is used for forming the pulp to make the pulp into a wet blank. The forming principle of the fourdrinier wire forming machine can refer to the prior art, and is not described in detail herein. The slurry prepared by the slurry preparing and preparing system enters the fourdrinier forming machine under the action of the gravity of the fourdrinier forming machine.
And a hydraulic machine is arranged at the downstream of the fourdrinier forming machine and is used for pressing and dehydrating the wet blank so as to obtain the wet blank meeting the requirements. A first conveying roller is arranged between the fourdrinier forming machine and the hydraulic press. The first conveying roller is used for conveying the wet blank output by the fourdrinier forming machine to the hydraulic machine. Downstream of the hydraulic press is a curing oven for drying the wet mat to form a high density ceramic fiberboard. And a second conveying roller is arranged between the hydraulic press and the curing oven and is used for conveying the wet blanks output by the hydraulic press to the curing oven.
In the production system, the technological processes of preparing slurry, forming a wet blank, performing compression dehydration on the wet blank and drying the wet blank are sequentially performed, and the high-density ceramic fiber board can be obtained through the technological processes. Therefore, the production system of the high-density ceramic fiber board can realize the intelligent continuous production of the high-density ceramic fiber board, thereby reducing the amount of manual labor and improving the production efficiency.
The hydraulic press is described in detail below: the hydraulic press 1 comprises a piston 14, an upper die suction box 11, a frame and a lower die suction box 12. The upper mold suction box 11 is connected to the piston 14 and can move up and down along with the piston 14. The bottom of the upper mold suction box 11 has an upper mold plate for contacting the upper surface of the wet blank. The upper die flat plate is provided with an upper water hole which is communicated with the inside of the upper die suction box. The lower mold suction box 12 is arranged on the frame. The lower mold suction box 12 is located below the upper mold suction box 11. The lower suction box 12 has a lower plate for carrying the wet blanks. The lower die flat plate is provided with a water drainage hole which is communicated with the interior of the lower die suction box 12.
After the wet blank is conveyed to the upper part of the lower die flat plate, the piston 14 moves downwards to drive the upper die flat plate to move downwards, the upper die flat plate compresses the wet blank towards the lower die flat plate, and after the preset compression amount is reached, the piston 14 stops moving downwards and drives the upper die flat plate to move upwards. Ready for compression of the next wet blank. When the wet green body is extruded from the upper die plate, the water extruded from the upper die suction box 11 is sucked away from the lower die suction box 12. The required wet blank can be obtained by controlling the compression amount of the hydraulic press 1, so that the processed high-density ceramic fiber board can be prevented from being easily cracked.
The water absorption principle of the upper die suction box 11 and the lower die suction box 12 is as follows: the upper mold suction box 11 is communicated with a vacuum pump through a vacuum pipe 13, and the lower mold suction box 12 is also communicated with the vacuum pump through a vacuum pipe 13. When the wet mat is compressed by the hydraulic press 1, the vacuum pump is started, so that negative pressure is formed in the upper mold suction box 11 and the lower mold suction box 12, and water extruded from the wet mat is sucked into the upper mold suction box 11 or the lower mold suction box 12.
The compression of the hydraulic machine 1 can be controlled in particular by means of a travel switch. When the piston 14 moves down to the lower stop point, the travel switch is triggered, and then the piston 14 stops moving down, and then moves up to reset. In addition, a pressure sensor can be arranged in the hydraulic machine 1 and used for detecting the compression amount of the hydraulic machine 1, and when the compression amount reaches a set value, the pressure sensor controls the piston to stop moving.
In order to ensure that the upper flat plate can compress the wet blank along a straight line, the invention also designs the following steps: an upper fixing plate 17, an upper die plate 15 and guide posts 16 are provided. The upper fixing plate 17 is a stationary member. The upper die plate 15 is located below the upper fixing plate 17. The upper mold suction box 11 is attached to the upper mold plate 15. The upper end of the guide post 16 is connected with the upper fixing plate 17, and the lower end is connected with the machine frame. The guide post 16 penetrates the upper die plate 15. The upper die plate 15 is provided with guide holes matched with the guide posts 16. Therefore, when the piston 14 drives the upper die plate 15 to move downwards, the guide holes are restrained by the guide columns 16, so that the upper die plate 15 and the upper die suction box 11 can strictly press the wet blank downwards along a straight line, the compression precision is improved, and the quality of the high-density ceramic fiber board is improved.
In order to facilitate the continuous transmission of the wet blank, the hydraulic press 1 also comprises a conveying mesh belt, and the conveying mesh belt is used for conveying the wet blank and is matched with the compression operation of the upper die flat plate. The fourdrinier forming machine conveys the wet blank to a conveying mesh belt through a first conveying roller, after pressing is finished, the conveying mesh belt conveys the wet blank to a second conveying roller, and the second conveying roller conveys the wet blank to a curing furnace.
The conveying net belt is tensioned on a tension roller, and the tension roller is driven by a motor. When the tension roller rotates, the conveying net belt can be driven to transmit. The conveying mesh belt is located above the lower die flat plate, transmission of the conveying mesh belt can be suspended after the conveying mesh belt conveys the wet blank to the lower die flat plate, compression of the upper die flat plate is waited, and transmission of the conveying mesh belt is continued after the compression is finished, so that the wet blank is conveyed to the second conveying roller. The transmission of the conveying net belt is controlled by a motor, so that the motor is controlled.
Further, the motor is preferably a speed regulating motor, so that the transmission of the conveying belt is controlled conveniently. In addition, the conveying mesh belt is preferably an endless polyester dry mesh belt. The endless polyester dry net belt has the advantages of abrasion resistance, flat net surface, long service life and the like.
The pulping and pulp mixing system is described in detail as follows: the pulping and pulp-distributing system comprises a pulping machine, a pulp-distributing tank and a head tank. The pulping machine is specifically a hydrapulper or a volt-beater, the bottom of the pulping machine is provided with an outlet, the outlet is connected with a first pipeline, and the other end of the first pipeline is connected with an inlet of the pulping pool. And a first slurry conveying pump is arranged in the first pipeline and used for conveying the slurry made by the pulping machine to the slurry preparation pool.
A stirrer is arranged in the slurry preparation machine, so that the slurry is stirred uniformly. The pulp distributor is communicated with the head tank through a second pipeline. And a second conveying pump is arranged in the second pipeline and used for conveying the slurry in the slurry preparation tank to the elevated tank. It should be noted that a slag separator may be further disposed in the second pipeline to filter out slag in the slurry in the second pipeline, so as to ensure smoothness of subsequent slurry blanking.
The elevated tank is communicated with the fourdrinier forming machine through a third pipeline. The third pipeline is vertically arranged, and the slurry in the elevated tank flows into the fourdrinier molding machine through the third pipeline by means of gravity. Slurry in the elevated tank can be ensured to be discharged smoothly by optimizing the height difference between the elevated tank and the fourdrinier forming machine, and the third pipeline is not easy to block. The height difference between the head tank and the fourdrinier wire forming machine will be described in detail below, and will not be described here.
The production system of the high-density ceramic fiber board in the invention further comprises a post-treatment system, and the post-treatment system comprises: slitting machine, steering mechanism, crosscut machine, hacking machine. The slitting machine cuts the high-density ceramic fiber board along the width direction of the high-density ceramic fiber board, the high-density ceramic fiber board after slitting moves to the steering mechanism through the driving roller, the steering structure is used for rotating the high-density ceramic fiber board by 90 degrees, and then the transverse cutting machine cuts the high-density ceramic fiber board along the length direction of the high-density ceramic fiber board, so that the high-density ceramic fiber board with the size meeting the requirement is manufactured. And finally, stacking the high-density ceramic fiber board on a tray by a stacking machine.
The invention also discloses a production method of the high-density ceramic fiber board, and the production system based on the high-density ceramic fiber board comprises the following steps:
s1: and preparing slurry.
S2: the slurry enters a fourdrinier forming machine under the action of gravity, and the fourdrinier forming machine makes the slurry into a wet blank.
S3: the wet blank is conveyed to the conveying mesh belt through the first conveying roller, the wet blank is pressed and dehydrated through the hydraulic machine, and then the wet blank is conveyed to the second conveying roller through the conveying mesh belt.
S4: and the wet blank is conveyed to a curing oven by the second conveying roller, and the wet blank is dried by the curing oven.
The high-density ceramic fiber board can be obtained after the four steps. And the prepared slurry enters a fourdrinier forming machine under the action of gravity, then the wet blank is conveyed to a conveying mesh belt through a first conveying roller, the conveying mesh belt is matched with a hydraulic press to complete pressing and dewatering operation, then the wet blank is conveyed to a second conveying roller through the conveying belt, and the wet blank is conveyed to a curing furnace through the second conveying roller to be dried. Namely, the invention completes the turnover of the wet blank through the first conveying roller, the conveying mesh belt and the second conveying roller. Therefore, the method can realize the intelligent continuous production of the high-density ceramic fiber board, thereby reducing the amount of manual labor and improving the production efficiency.
In the prior art, the slurry in the slurry preparation tank is conveyed to the slurry storage tank, and then the slurry in the slurry storage tank is conveyed to the elevated tank. The slurry prepared by the method generates a large amount of precipitates in a slurry storage tank, and a large amount of white spots exist on the surface of a formed wet blank, so that the compressive strength of the high-density ceramic fiber board is seriously influenced. Therefore, the invention omits a slurry storage tank, and directly conveys the slurry in the slurry preparation tank to the elevated tank so as to avoid generating a large amount of precipitates and avoid generating a large amount of white spots on the surface of the wet blank. Therefore, step S1 specifically includes: s11: and (5) making slurry by using a pulping machine. S12: and preparing the slurry by using a slurry preparation tank. S13: and conveying the slurry to a high-level tank after deslagging.
In the invention, the height difference between the discharge hole of the head tank and the feed inlet of the fourdrinier forming machine is H1, the distance between the liquid level in the head tank and the discharge hole of the head tank is H2, and H1 and H2 satisfy the following relations: h2 is more than or equal to 0.6H1 and less than or equal to H1.
When H2 is in the range of 0.6 times H1 to 1 time H1, and the valve opening size of the head tank is proper, the slurry blanking speed is stable, and continuous production can be realized. The slurry is uniformly distributed on the fourdrinier forming machine, the thickness of a wet blank is basically consistent, and the density and the strength of a final product are relatively stable.
In the comparative example, when H2 is 0.3H1, the blanking speed is slow even when the valve of the head tank is opened to the maximum, and the problems of slurry breaking and pipeline blockage often occur, so that continuous production cannot be realized. When H2 is 1.5H1, the blanking speed is fast even when the valve of the head tank is opened to the minimum, smooth and continuous blanking cannot be realized, the slurry is not uniformly distributed on the fourdrinier forming machine, the stability of the thickness of a wet blank is affected, and the density and the strength of a final product are unstable.
In the invention, the wet blank thickness of the wet blank formed by the fourdrinier forming machine is H, the density of the wet blank is rho 1, and the water content of the wet blank is w 1. The wet blank thickness of the wet blank after pressing and dehydration by the hydraulic press is h, the density of the wet blank is rho 2, and the water content of the wet blank is w 2. And H ═ H (0.6 to 0.7) H, w2 ═ (0.8 to 0.9) w1, and ρ 1 ═ H ═ ρ 2 ═ H. When the technological parameters of the wet blank meet the series of formulas, the press forming effect is good, the wet blank does not crack, and the drying does not crack.
In the comparative example, H is 0.8H, and ρ 1 × H is ρ 2 × H. At this time, the volume density of the dried product is only 708kg/m3, and the volume density does not meet the volume density requirement designed by the invention. The product percent of pass: 10 percent; production efficiency: 9.2 tons/day.
When w2 is 0.6w1, the moisture content of the wet blank before pressing is too large, and the wet blank discharged from the fourdrinier forming machine is broken into blocks when being conveyed on the first conveying roller, so that the wet blank cannot be integrally conveyed to the lower part of the hydraulic press for forming.
When w2 is 0.9w1, the moisture content of the wet blank before pressing is too small, the wet blank from the fourdrinier forming machine is dry cracked when being conveyed on a first conveying roller, namely, irregular cracks appear on the surface, and the surface of a product pressed and dried by a hydraulic press has a cracking phenomenon, so that the appearance quality of the product is influenced.
In one embodiment of the present invention, the process parameters at each stage are as follows:
the slurry concentration: 5.8 percent.
Height H2 between liquid level of head tank and discharge port: 1.8 m.
Height difference H1 between the discharge hole of the head tank and the feed inlet of the fourdrinier forming machine: 2.8 m.
Moisture content of wet blank before pressing: and 55 percent.
Moisture content of the pressed wet blank: 45 percent.
Thickness of wet blank before pressing: 58 mm.
Thickness of wet blank after pressing: 35mm, density after drying: 948kg/m3。
The product percent of pass: 93 percent.
Production efficiency: the daily output is 15.8 tons.
As can be seen from the example, the produced ceramic fiber board has high yield and high production efficiency.
The curing oven of the invention is used for drying the wet blank according to the following steps: accelerated drying, uniform drying and reduced drying. This ensures the quality of the dried high-density ceramic fiber sheet.
Finally, it should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (15)
1. A system for producing high density ceramic fiber board, comprising:
a pulping and pulp mixing system;
the long net forming machine is used for forming a wet blank, and the slurry prepared by the slurry preparing and distributing system enters the long net forming machine under the action of gravity;
the hydraulic press is positioned at the downstream of the fourdrinier wire forming machine, a first conveying roller is arranged between the fourdrinier wire forming machine and the hydraulic press, the first conveying roller is used for conveying the wet blank to the hydraulic press, and the hydraulic press is used for pressing and dehydrating the wet blank;
and the curing oven is positioned at the downstream of the hydraulic press and used for drying the wet blank, and a second conveying roller is arranged between the hydraulic press and the curing oven and used for conveying the wet blank to the curing oven.
2. The system for producing high-density ceramic fiber board according to claim 1, wherein the hydraulic press comprises:
a piston;
go up the mould suction box, go up the mould suction box with piston connection, it has last mould flat board to go up the mould suction box, it is used for the extrusion to go up the mould flat board wet base, just go up and be provided with the water hole on the mould flat board, go up the water hole with go up the inside intercommunication of mould suction box
A frame;
the lower mould suction box, the lower mould suction box sets up the frame, just the lower mould suction box is located go up the below of mould suction box, the lower mould suction box has the lower mould flat board, be provided with down the water hole on the lower mould flat board, down the water hole with the inside intercommunication of lower mould suction box.
3. The system for producing a high-density ceramic fiberboard of claim 2, wherein the upper mold suction box and the lower mold suction box are both communicated with a vacuum pump through vacuum pipes.
4. The system for producing high-density ceramic fiber sheets as claimed in claim 2, wherein the hydraulic press further comprises a stroke switch for limiting a moving range of the piston.
5. The production system of high-density ceramic fiber board as claimed in claim 2, wherein the hydraulic press further comprises an upper fixing plate, an upper mold plate and a guide post, the upper mold suction box is connected to the upper mold plate, the upper end of the guide post is fixedly connected to the upper fixing plate, the lower end of the guide post is fixedly connected to the frame, the guide post penetrates through the upper mold plate, and the upper mold plate is provided with a guide hole matched with the guide post.
6. The system for producing a high-density ceramic fiber board according to claim 2, wherein the hydraulic press further comprises a mesh belt, an inlet end of the mesh belt is communicated with the first conveying roller, and an outlet end of the mesh belt is communicated with the second conveying roller.
7. The system for producing high-density ceramic fiber board according to claim 6, wherein the conveyor belt is an endless polyester net belt, and the conveyor belt is tensioned by a tension roller driven by a motor.
8. The system for producing high-density ceramic fiber board according to claim 1, wherein the slurry preparing system comprises: the pulping machine comprises a pulping machine, a pulp distribution pool and a high-level groove, wherein the pulping machine is communicated with the pulp distribution pool through a first pipeline, a first pulp conveying pump is arranged in the first pipeline, the pulp distribution pool is communicated with the high-level groove through a second pipeline, a second pulp conveying pump is arranged in the second pipeline, the high-level groove is communicated with the fourdrinier forming machine through a third pipeline, and the third pipeline is vertically arranged.
9. The system for producing high density ceramic fiber board of claim 8, wherein a slag remover is further disposed in the second conduit.
10. The production system of high density ceramic fiber board of claim 1, further comprising an aftertreatment system, the aftertreatment system comprising: slitting machine, steering mechanism, crosscut machine, hacking machine.
11. A production method of high-density ceramic fiber board is based on the production system of high-density ceramic fiber board, and is characterized by comprising the following steps:
s1: preparing slurry;
s2: feeding the slurry into the fourdrinier forming machine under the action of gravity, and making the slurry into a wet blank by the fourdrinier forming machine;
s3: the wet blanks are conveyed to the conveying mesh belt through the first conveying roller, the wet blanks are pressed and dehydrated by the hydraulic machine, and then the wet blanks are conveyed to the second conveying roller by the conveying mesh belt;
s4: and the wet blank is conveyed to the curing oven by the second conveying roller, and the wet blank is dried by the curing oven.
12. The method for producing a high-density ceramic fiber board according to claim 11, wherein the step S1 specifically includes:
s11: making slurry by using the pulping machine;
s12: preparing slurry by using the slurry preparation tank;
s13: and conveying the slurry to a high-level tank after deslagging.
13. The method for producing a high-density ceramic fiberboard of claim 12, wherein the height difference between the discharge port of the head tank and the feed port of the fourdrinier forming machine is H1, the distance between the liquid level in the head tank and the discharge port of the head tank is H2, and 0.6H1 ≤ H2 ≤ H1.
14. The production method of a high-density ceramic fiber sheet as claimed in claim 11, wherein the wet mat produced in the step S2 has a wet mat thickness of H, a wet mat density of ρ 1, and a wet mat water content of w 1;
the wet blank thickness of the wet blank pressed and dehydrated by the hydraulic press in the step S3 is h, the density of the wet blank is rho 2, and the moisture content of the wet blank is w 2;
and H ═ H (0.6 to 0.7) H, w2 ═ (0.8 to 0.9) w1, ρ 1 ═ H ═ ρ 2 ═ H.
15. The method for producing a high-density ceramic fiber board according to claim 11, wherein the drying of the wet blank by the curing oven in step S4 includes accelerated drying, uniform drying and decelerated drying.
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