CN114775285A - PVA fiber dispersion treatment method for preparing ECC concrete - Google Patents
PVA fiber dispersion treatment method for preparing ECC concrete Download PDFInfo
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- CN114775285A CN114775285A CN202210262125.6A CN202210262125A CN114775285A CN 114775285 A CN114775285 A CN 114775285A CN 202210262125 A CN202210262125 A CN 202210262125A CN 114775285 A CN114775285 A CN 114775285A
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/263—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acids; Salts or esters thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
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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
- B28B1/525—Producing shaped prefabricated articles from the material specially adapted for producing articles from mixtures containing fibres, e.g. asbestos cement containing organic fibres, e.g. wood fibres
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/564—Polyureas, polyurethanes or other polymers having ureide or urethane links; Precondensation products forming them
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/643—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicon in the main chain
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/28—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/18—Synthetic fibres consisting of macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M2101/24—Polymers or copolymers of alkenylalcohols or esters thereof; Polymers or copolymers of alkenylethers, acetals or ketones
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- Chemical Kinetics & Catalysis (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- General Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
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- Manufacturing & Machinery (AREA)
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- Treatment Of Fiber Materials (AREA)
Abstract
The invention belongs to the technical field of PVA fiber dispersion treatment, and provides a PVA fiber dispersion treatment method for preparing ECC concrete, which mainly comprises the following steps: s10, spraying and cleaning a PVA fiber material to be processed; s20, drying the cleaned PVA fiber material; s30, sequentially infiltrating and padding the PVA fiber material; s40, drying the PVA fiber material subjected to surface treatment; s50, arranging a fiber screen and a first fan, and enabling the PVA fiber material subjected to post-drying operation to move towards the fiber screen under the action of the first fan and be separated and discharged from the mesh part of the fiber screen; s60, collecting; and temporarily storing and collecting the dispersed PVA fibers. The invention can effectively overcome the problems of large discreteness and easy cluster stirring of PVA fiber in the traditional technology, and ensure the dispersion quality of the PVA fiber in the process of putting.
Description
Technical Field
The invention belongs to the technical field of PVA fiber dispersion treatment, and particularly relates to a PVA fiber dispersion treatment method for preparing ECC concrete.
Background
The high-ductility cement-based composite material (ECC) is a special high-performance fiber-reinforced cement-based material, which is designed based on the micro-mechanics and fracture mechanics theory, and the mechanical properties of the material are controlled by adjusting the properties of fibers, matrix and fiber-matrix interface. The material is formed by doping Polyvinyl Alcohol (PVA) short fibers with a certain volume on a substrate consisting of water, portland cement, quartz sand, fly ash and a high-performance water reducing agent, and compared with common concrete, fiber concrete (including steel fiber concrete, plant fiber concrete and carbon fiber concrete) and high-performance concrete, the material has greatly improved toughness, durability, fatigue resistance and the like. Wherein the degree of uniform dispersion of the PVA fibers is one of the key factors affecting the performance thereof.
In the existing ECC concrete preparation process, the phenomenon of poor dispersion quality of PVA fibers is easy to occur.
Disclosure of Invention
In order to overcome the above disadvantages of the prior art, the present invention aims to provide a PVA fiber dispersion treatment method for preparing ECC concrete, so as to effectively overcome the problems of high dispersion and easy agglomeration of PVA fibers during the delivery in the conventional technology, and ensure the dispersion quality of PVA fibers during the delivery.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a PVA fiber dispersion treatment method for preparing ECC concrete comprises the following steps:
s10, cleaning; spraying and cleaning a PVA fiber material to be processed, wherein the PVA fiber material needs to be completely soaked by cleaning solution in the spraying and cleaning process, the cleaning solution comprises a mixed solution of a surfactant and NaOH, and the temperature of the cleaning solution is not lower than 60 ℃;
s20, drying the materials in front; drying the cleaned PVA fiber material, wherein the heat source output is closed before drying, the PVA fiber material is subjected to primary stirring, then the heat source output is started, and the PVA fiber material is subjected to secondary stirring, wherein the drying temperature of the heat source is not lower than 80 ℃;
s30, surface treatment; sequentially performing infiltration and padding treatment on the PVA fiber material, wherein in the infiltration treatment, treatment liquid is sprayed and immersed on the PVA fiber material, the treatment liquid comprises a first treatment agent liquid and a second treatment agent liquid, the first treatment agent liquid comprises polyacrylate and polyurethane aqueous emulsion, and the second treatment agent liquid comprises organic silicon emulsion; in padding treatment, the PVA fiber material after the padding treatment is printed and padded through a roller set;
s40, drying; drying the PVA fiber material after surface treatment, wherein the PVA fiber material is laid flatly, and the drying temperature of a heat source is not lower than 80 ℃;
s50, performing dispersion treatment; arranging a fiber screen and a first fan, and enabling the PVA fiber material subjected to post-drying operation to move towards the fiber screen under the action of the first fan and separate and penetrate from meshes of the fiber screen, wherein the meshes on the fiber screen are arranged according to the dispersion requirement;
s60, collecting; and temporarily storing and collecting the dispersed PVA fibers.
Further, a cleaning device is arranged in the step S10, and a first conveying belt for conveying the PVA fiber material and a plurality of first spray heads for spraying the cleaning liquid are arranged in the cleaning device;
the first spray heads are arranged above the first conveying belt and distributed along the conveying direction of the first conveying belt, and the water temperature of the cleaning liquid sprayed out of the first spray heads is controlled to be 80-100 ℃.
Further, a circulation treatment step is formed between step S20 and step S10, in which one continuous washing, primary stirring and secondary stirring are performed as a single circulation treatment step period, and the number of cycles of the circulation treatment step period to be performed is selected according to the condition of the PVA fiber material.
Further, a front drying device is arranged in the step S20, and a plurality of stirring wheels and a plurality of first heat lamps are arranged in the front drying device;
the axes of the plurality of stirring wheels are horizontally arranged, and the plurality of first heat energy lamps are arranged and arranged above the stirring wheels along the conveying direction of the PVA fiber material.
Further, the drying temperature of the first heat energy lamp is controlled between 100-120 ℃, and the single drying time is controlled between 5-10 minutes.
Further, in step S30, a loop process flow is formed between the soaking process and the padding process, wherein a single loop process flow cycle is formed by performing a continuous soaking process and a continuous padding process, and the number of loop cycles of the loop process flow cycle to be performed is selected according to the condition of the PVA fiber material.
Further, a surface treatment device is arranged in step S30, and a soaking work area and a padding work area are sequentially arranged in the surface treatment device along the conveying direction of the PVA fiber material;
the soaking working area is internally provided with a plurality of second spray heads for spraying treatment liquid, and the roller set is arranged in the soaking working area.
Further, a post-drying device is arranged in the step S40, and a second conveying belt and a plurality of second heat lamps for conveying the PVA fiber material are arranged in the post-drying device;
and the plurality of second heat energy lamps are arranged above the second conveying belt and are arranged along the conveying direction of the second conveying belt.
Further, in step S50, a dispersion processing device is provided, where the dispersion processing device includes a first table, and the first fan is provided at a material input end of the first table and the fiber screen is provided at a material output end of the first table along a conveying direction of the PVA fiber material;
and a plurality of guide stirring wheels are arranged on two sides of the end surface of the first workbench.
Further, a feeding device is arranged in step S60, the feeding device includes a second workbench and a second fan, and the second fan is arranged at a material input end of the second workbench along the conveying direction of the PVA fiber material;
inclined guide plates are arranged on two sides of the material output end of the second workbench, and a throwing opening is formed between the inclined guide plates on the two sides.
Compared with the prior art, the invention has the beneficial effects that:
the scheme is simple to operate, the surface treatment quality of the PVA fiber can be strictly controlled during ECC concrete preparation, the problem of unstable quality of the PVA fiber is solved, and the bonding property of the PVA fiber and concrete can be better in subsequent use.
Simultaneously, this scheme can apply to automatic dispersion and the input of PVA fibre in the ECC concrete preparation, and the operation is labour saving and time saving, compares in traditional technique like during manual dispersion, can improve dispersion efficiency and dispersion quality effectively, improves the homogeneity of PVA fibre when putting in, reduces or even avoids stirring the appearance of group phenomenon.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a schematic system diagram of the dispersion treatment method of the present invention.
FIG. 2 is a schematic view of the cleaning apparatus of the present invention.
Fig. 3 is a schematic structural diagram of the first drying device of the present invention.
FIG. 4 is a schematic structural view of the surface treatment apparatus of the present invention.
Fig. 5 is a schematic structural diagram of a second drying device according to the present invention.
FIG. 6 is a schematic view of the dispersing device of the present invention.
Fig. 7 is a schematic structural diagram of the dispensing device of the present invention.
Wherein:
1-PVA fiber material;
2-a cleaning device, 21-a first conveyer belt, 22-a first spray head;
3-a pre-drying device, 31-a stirring wheel and 32-a first heat lamp;
4-surface treatment device, 41-second spray head, 42-roller group;
5-a post-drying device, 51-a second conveyer belt, 52-a second heat lamp;
6-a dispersion treatment device, 61-a first workbench, 62-a first fan, 63-a fiber screen and 64-a guide stirring wheel;
7-a throwing device, 71-a second workbench, 72-a second fan, 73-an inclined guide plate and 74-a throwing port;
8-concrete mixing equipment.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a detailed description of the present invention will be made with reference to the accompanying drawings and detailed description. In addition, the embodiments and features of the embodiments of the present application may be combined with each other without conflict. In the following description, numerous specific details are set forth to provide a thorough understanding of the present invention, and the described embodiments are merely a subset of the embodiments of the present invention, rather than a complete embodiment. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments of the present invention, belong to the protection scope of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Example 1
As shown in fig. 1 to 7, this embodiment provides a PVA fiber dispersion treatment method for preparing ECC concrete, which mainly includes the following steps:
and S10, cleaning. And cleaning the PVA fiber material 1 to be processed so as to clean textile oil, dust and other impurities attached to the surface of the fiber in the production process of the PVA fiber material 1. As a preferable mode, the PVA fiber material 1 is cleaned in a spraying and cleaning mode, and the spraying mode can effectively facilitate the falling off of dust and impurities; meanwhile, during the spraying and cleaning process, the PVA fiber material 1 needs to be completely soaked by the cleaning solution, so that the cleaning solution and the PVA fiber material 1 can react sufficiently.
Wherein the cleaning solution comprises a mixed solution of a surfactant and NaOH; here, the surfactant may employ fatty alcohol-polyoxyethylene ether. The temperature of the cleaning solution should be not lower than 60 ℃, as an application example, the temperature of the cleaning solution in the scheme is controlled between 80 ℃ and 100 ℃, so as to effectively remove the textile oil stains and partial impurities on the surface of the PVA fiber material 1.
Further, in the present embodiment, the cleaning apparatus 2 is provided for the cleaning processing operation in step S10. A first conveying belt 21 and a plurality of first nozzles 22 are arranged in the cleaning device 2, and the PVA fiber material 1 falls on the surface of the first conveying belt 21 after entering the cleaning device 2 and is conveyed to the next processing station or procedure along with the operation of the first conveying belt 21; the first spray heads 22 are used for synchronously and uniformly spraying the cleaning liquid. The first spray heads 22 are arranged above the first conveyor belt 21 and arranged along the conveying direction of the first conveyor belt 21 to ensure the spraying quality.
S20, drying. Carrying out primary drying treatment on the cleaned PVA fiber material 1; wherein, before drying, the output of a heat source is firstly closed, and the PVA fiber material 1 is subjected to primary stirring, so that the cleaning solution and the PVA fiber material 1 can be mixed more fully; and discharging the cleaning liquid after uniform mixing. And then starting a heat source to output and carrying out secondary stirring on the PVA fiber material 1 so that the PVA fiber material 1 can be uniformly heated and dried.
Further, in the present embodiment, the pre-drying device 3 is provided for performing the first drying process in step S20. A plurality of stirring wheels 31 and a plurality of first heat lamps 32 are arranged in the front drying device 3; as a preferable scheme, in this embodiment, axes of the plurality of stirring wheels 31 are arranged horizontally, so that during the stirring process, the PVA fiber material 1 has a movement process from a lower position to a higher position and then from the higher position to the lower position, which can make the mixing and stirring effect of the PVA fiber material 1 and the cleaning solution better; moreover, in this stirring manner, during the drying process, the PVA fiber material 1 can be attached to the wheel surface of the stirring wheel 31 more uniformly, so that the dried area can be increased, and the drying effect is better. And a plurality of the first heat lamps 32 are uniformly arranged above the stirring wheel 31 along the conveying direction of the PVA fiber material 1.
Wherein the drying temperature of the heat source is not lower than 80 ℃; as an example of one of the applications, in the present embodiment, the drying temperature of the first thermal energy lamp 32 is controlled to be between 100 ℃ and 120 ℃, and the single drying time is controlled to be between 5-10 minutes. Further, as a preferred application example, in the present embodiment, a circulation processing step is formed between step S20 and step S10, where a continuous washing, a primary stirring and a secondary stirring are performed as a single circulation processing step period, and a user can select the number of times of circulation of the circulation processing step period to be performed according to the current condition of the PVA fiber material 1 to ensure the surface cleanness of the PVA fiber material 1.
And S30, surface treatment. Sequentially carrying out soaking and padding treatment on the PVA fiber material 1 subjected to the primary drying treatment; in the soaking treatment, the PVA fiber material 1 is sprayed and soaked with the treatment solution, so that the PVA fiber material 1 is soaked in the treatment solution, and the treatment solution is fully adhered to the fiber surface of the PVA fiber material. In the scheme, the treatment liquid comprises a first treatment agent liquid and a second treatment agent liquid, wherein the first treatment agent liquid comprises polyacrylate and polyurethane aqueous emulsion so as to enhance the mechanical property of the PVA fiber material; the second treating agent liquid comprises organic silicon emulsion and can improve the bonding performance of the fiber surface and concrete. In the padding process, the PVA fiber material 1 after the wetting process is padded by a plurality of roller sets 42 to pad the processing liquid on the fiber surface by a certain padding pressure, thereby ensuring the surface quality of the PVA fiber material 1.
Further, in the present embodiment, the surface treatment device 4 is provided for performing the surface treatment operation in step S30. A soaking working area and a padding working area are sequentially arranged in the surface treatment device 4 along the conveying direction of the PVA fiber material 1; a plurality of second spray heads 41 for spraying treatment liquid are arranged in the soaking working area, and the roller set 42 is arranged in the soaking working area.
As a preferable application example, in step S30, a circulation process flow is formed between the soaking process and the padding process, wherein, with one continuous soaking process and padding process as a single circulation process flow period, the user can select the number of circulation times of the circulation process flow period to be performed according to the current condition of the PVA fiber material 1.
And S40, drying. And carrying out secondary drying treatment on the PVA fiber material 1 after surface treatment, wherein the PVA fiber material 1 is laid flatly, and the drying temperature of a heat source is controlled to be not lower than 80 ℃.
Further, in the present embodiment, the post-drying device 5 is provided for performing the second drying process in step S40. A second conveying belt 51 and a plurality of second heat lamps 52 for conveying the PVA fiber material 1 are arranged in the post-drying device 5, the PVA fiber material 1 is laid on the second conveying belt 51 and can be conveyed to the next station or working procedure along with the operation of the second conveying belt 51; the second heat lamps 52 are disposed above the second conveyor belt 51 and are uniformly arranged along the conveying direction of the second conveyor belt 51, so that the PVA fiber materials 1 laid on the second conveyor belt 51 can be uniformly heated. As an application example given therein, the second drying treatment is performed at a drying temperature of about 100-120 ℃, and the drying time is set to be between 5-10 minutes each time.
And S50, performing dispersion treatment. Dispersing the PVA fiber material 1 subjected to the secondary drying treatment, wherein a fiber screen 63 and a first fan 62 are arranged in the scheme, and the PVA fiber material 1 subjected to the secondary drying operation moves towards the fiber screen 63 under the action of the first fan 62 and is separated and penetrated out from the mesh part of the fiber screen 63, so that the dispersing operation is completed; the mesh of the fiber screen 63 is set according to the dispersion requirement.
Further, in the present embodiment, the dispersion processing device 6 is provided for performing the dispersion processing in step S50. The dispersion treatment apparatus 6 includes a first table 61, and the first fan 62 is provided at a material input end of the first table 61 and the fiber screen 63 is provided at a material output end of the first table 61 along a conveyance direction of the PVA fiber material 1; through control first fan 62's wind speed and wind pressure can realize passing through in the unit interval the fiber screen 63 PVA fiber material 1's volume, easy operation, convenience.
Preferably, in this embodiment, a plurality of guiding and stirring wheels 64 are further disposed on both sides of the end surface of the first worktable 61, and the guiding and stirring wheels 64 are disposed to effectively ensure that the PVA fiber materials 1 moving onto the first worktable 61 can be concentrated toward the middle of the first worktable 61, so as to be located in the wind force action zone of the first fan 62, and to facilitate the dispersion operation of the PVA fiber materials 1.
And S60, collecting. And temporarily storing and collecting the dispersed PVA fiber material 1 so as to be convenient for subsequent throwing in when being mixed with concrete.
Further, in the present embodiment, the dispensing device 7 is provided for collection and re-dispensing in step S60. The feeding device 7 comprises a second workbench 71 and a second fan 72, and the second fan 72 is arranged at the material input end of the second workbench 71 along the conveying direction of the PVA fiber material 1; inclined guide plates 73 are arranged on two sides of the material output end of the second working table 71, a flared end formed between the inclined guide plates 73 on the two sides is arranged towards the second fan 72, and a narrow end formed between the inclined guide plates 73 on the two sides is used as a feeding opening 74. In practical applications, a concrete mixing device 8 is usually disposed below the feeding port 74, and the dispersed PVA fiber material 1 is gradually blended into the concrete as the concrete is mixed, so as to achieve uniform distribution of the PVA fiber material 1 in the concrete.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, so that any modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (10)
1. A PVA fiber dispersion treatment method for preparing ECC concrete is characterized by comprising the following steps:
s10, cleaning; spraying and cleaning a PVA fiber material to be processed, wherein the PVA fiber material needs to be completely soaked by cleaning solution in the spraying and cleaning process, the cleaning solution comprises a mixed solution of a surfactant and NaOH, and the temperature of the cleaning solution is not lower than 60 ℃;
s20, front drying; drying the cleaned PVA fiber material, wherein the heat source output is closed before drying, primary stirring is carried out on the PVA fiber material, then the heat source output is started, secondary stirring is carried out on the PVA fiber material, and the drying temperature of the heat source is not lower than 80 ℃;
s30, surface treatment; sequentially performing infiltration and padding treatment on the PVA fiber material, wherein in the infiltration treatment, treatment liquid is sprayed and immersed on the PVA fiber material, the treatment liquid comprises a first treatment agent liquid and a second treatment agent liquid, the first treatment agent liquid comprises polyacrylate and polyurethane aqueous emulsion, and the second treatment agent liquid comprises organic silicon emulsion; in padding treatment, the PVA fiber material after the padding treatment is printed and padded through a roller set;
s40, drying; drying the PVA fiber material after surface treatment, wherein the PVA fiber material is laid flatly, and the drying temperature of a heat source is not lower than 80 ℃;
s50, performing dispersion treatment; arranging a fiber screen and a first fan, and enabling the PVA fiber material subjected to post-drying operation to move towards the fiber screen under the action of the first fan and separate and penetrate from meshes of the fiber screen, wherein the meshes on the fiber screen are arranged according to the dispersion requirement;
s60, collecting; and temporarily storing and collecting the dispersed PVA fibers.
2. The PVA fiber dispersion treatment method for preparing ECC concrete according to claim 1, wherein a cleaning device is arranged in the step S10, and a first conveying belt for conveying the PVA fiber material and a plurality of first nozzles for spraying the cleaning liquid are arranged in the cleaning device;
the first spray heads are arranged above the first conveying belt and distributed along the conveying direction of the first conveying belt, and the water temperature of the cleaning liquid sprayed out of the first spray heads is controlled to be 80-100 ℃.
3. The PVA fiber dispersion treatment method for producing ECC concrete according to claim 1 or 2, wherein a circulation treatment step is formed between step S20 and step S10, wherein a continuous washing, primary stirring and secondary stirring are performed as a single circulation treatment step period, and the number of times of circulation of the circulation treatment step period to be performed is selected according to the condition of the PVA fiber material.
4. The PVA fiber dispersion treatment method for preparing ECC concrete according to claim 3, wherein a front drying device is arranged in the step S20, and a plurality of stirring wheels and a plurality of first heat energy lamps are arranged in the front drying device;
the axes of the plurality of stirring wheels are horizontally arranged, and the plurality of first heat energy lamps are arranged and arranged above the stirring wheels along the conveying direction of the PVA fiber material.
5. The PVA fiber dispersion treatment method for preparing ECC concrete according to claim 4, wherein the drying temperature of the first heat lamp is controlled to be between 100 ℃ and 120 ℃, and the single drying time is controlled to be between 5-10 minutes.
6. The PVA fiber dispersion treatment method for preparing ECC concrete according to any one of claims 1, 4 and 5, wherein in step S30, a circulation treatment process is formed between the soaking treatment and the padding treatment, wherein a single circulation treatment process period is formed by performing one continuous soaking treatment and padding treatment, and the number of circulation of the circulation treatment process period to be performed is selected according to the condition of the PVA fiber material.
7. The PVA fiber dispersion treatment method for preparing ECC concrete according to claim 6, wherein a surface treatment device is arranged in the step S30, and a soaking working area and a padding working area are sequentially arranged in the surface treatment device along the conveying direction of the PVA fiber material;
a plurality of second spray heads for spraying treatment liquid are arranged in the soaking working area, and the roller set is arranged in the soaking working area.
8. The PVA fiber dispersion treatment method for preparing ECC concrete according to claim 1 or 7, wherein a post-drying device is arranged in the step S40, and a second conveyer belt and a plurality of second heat lamps are arranged in the post-drying device for conveying the PVA fiber material;
the plurality of second heat energy lamps are arranged above the second conveying belt and arranged along the conveying direction of the second conveying belt.
9. The PVA fiber dispersing treatment method for preparing ECC concrete according to claim 8, wherein a dispersing treatment device is arranged in the step S50, the dispersing treatment device comprises a first workbench, the material input end of the first workbench is provided with the first fan, and the material output end of the first workbench is provided with the fiber screen;
and a plurality of guide stirring wheels are arranged on two sides of the end surface of the first workbench.
10. The PVA fiber dispersing treatment method for preparing ECC concrete according to claim 1 or 9, wherein a feeding device is arranged in the step S60, the feeding device comprises a second workbench and a second fan, and the second fan is arranged at a material input end of the second workbench along the conveying direction of the PVA fiber material;
inclined guide plates are arranged on two sides of the material output end of the second workbench, and a throwing opening is formed between the inclined guide plates on the two sides.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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