CN116731528A - Preparation method of road lignin fiber - Google Patents
Preparation method of road lignin fiber Download PDFInfo
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- CN116731528A CN116731528A CN202210235223.0A CN202210235223A CN116731528A CN 116731528 A CN116731528 A CN 116731528A CN 202210235223 A CN202210235223 A CN 202210235223A CN 116731528 A CN116731528 A CN 116731528A
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- stirring
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- tank
- piece
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- 239000000835 fiber Substances 0.000 title claims abstract description 39
- 229920005610 lignin Polymers 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 238000012216 screening Methods 0.000 claims abstract description 100
- 238000003756 stirring Methods 0.000 claims abstract description 94
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000010439 graphite Substances 0.000 claims abstract description 34
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 34
- 239000011812 mixed powder Substances 0.000 claims abstract description 30
- 239000000843 powder Substances 0.000 claims abstract description 29
- 239000005995 Aluminium silicate Substances 0.000 claims abstract description 27
- 235000012211 aluminium silicate Nutrition 0.000 claims abstract description 27
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 23
- 239000002023 wood Substances 0.000 claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 12
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 12
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 12
- 239000000725 suspension Substances 0.000 claims abstract description 11
- 239000011259 mixed solution Substances 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims description 31
- 239000010426 asphalt Substances 0.000 claims description 16
- 238000004321 preservation Methods 0.000 claims description 12
- 230000006835 compression Effects 0.000 claims description 10
- 238000007906 compression Methods 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 239000002270 dispersing agent Substances 0.000 claims description 7
- 238000007873 sieving Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000005485 electric heating Methods 0.000 claims description 5
- 238000001125 extrusion Methods 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 239000002893 slag Substances 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- 229920002748 Basalt fiber Polymers 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 238000009461 vacuum packaging Methods 0.000 claims description 3
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 abstract description 11
- 239000003063 flame retardant Substances 0.000 abstract description 11
- 238000009413 insulation Methods 0.000 abstract description 6
- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- 239000012535 impurity Substances 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 229920002522 Wood fibre Polymers 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 239000002025 wood fiber Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012796 inorganic flame retardant Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L97/00—Compositions of lignin-containing materials
- C08L97/02—Lignocellulosic material, e.g. wood, straw or bagasse
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2206—Oxides; Hydroxides of metals of calcium, strontium or barium
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
-
- 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
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The application discloses a preparation method of a road lignin fiber, which belongs to the technical field of lignin fiber preparation and comprises the following steps of: adding nano kaolin and water into a stirring device, and stirring and dispersing uniformly to obtain a suspension; adding the expanded graphite into the suspension, heating to 50-100 ℃, stirring uniformly, then rapidly cooling to 0-4 ℃ to obtain a mixed solution. According to the application, wood pulp and wood powder with high ignition point are adopted, calcium hydroxide is adopted as a flame retardant, and expanded graphite is adopted as a carbon source and a heat insulation layer, so that the flame retardant property of lignin fibers can be effectively and obviously improved, and meanwhile, the screening component and the stirring component are mutually matched to enable the interference component to push the screening component to rotate towards the direction away from the interference component, so that the screening component can vibrate rapidly, the quality of mixed powder can be effectively and efficiently improved, the mixed powder is fully stirred, and the flame retardant property of the lignin fibers can be obviously enhanced after the mixed powder is matched for use.
Description
Technical Field
The application relates to the technical field of lignin fiber preparation, in particular to a preparation method of road lignin fiber.
Background
Lignin fiber is an organic fiber, is mainly applied to pavement paving, and is an indispensable stabilizer. The lignin fiber is flocculent or granular. The road wood fiber preparation method is produced along with popularization of SMA pavement structures, and is fully called as asphalt horseshoe grease and macadam mixture, and is a novel pavement structure widely used in developed countries, and the road wood fiber preparation method is a hot-mix asphalt mixture which is formed by combining intermittent graded macadam and asphalt horseshoe grease (consisting of asphalt, fiber stabilizer, mineral powder and fine aggregate) Gao Wenban and is used as a pavement wearing layer or a finishing surface, and has the characteristics of effective embedding and extrusion among aggregates, thicker asphalt film, small void ratio, rough surface, fiber reinforcement and the like.
The prior lignin is limited and added with an inorganic flame retardant and publication paper for preparation, the ignition point of common newspapers is 130-150 ℃, the physical characteristics of the newspapers cannot be changed essentially, the publication paper is prepared from short fibers, the oil absorption rate is low, the oil absorption rate and the flame retardance are low, and meanwhile, when the lignin fiber screening device is used, the screening efficiency is low, and the screening effect is poor.
Disclosure of Invention
The application aims to solve the problems of low oil absorption rate, low flame retardance and the like of a lignin fiber finished product caused by defects of a preparation method and a preparation device in the existing preparation process of the lignin fiber.
In order to achieve the aim of the application, the application adopts the following technical scheme:
the application provides a preparation method of a road lignin fiber, which comprises the following raw materials in percentage by weight:
35% of wood pulp;
40% of wood powder;
10% of calcium hydroxide;
12% of asphalt powder;
1.5% of dispersant;
1% of expanded graphite;
wherein the lignin fiber further comprises 0.8% basalt fiber;
wherein nanometer kaolin is loaded in micropores of the expanded graphite;
wherein the mass ratio of the expanded graphite to the nano kaolin is 1:0.1-0.2;
the manufacturing method of the road lignin fiber comprises the following steps:
a. preparing materials: (1) Adding nano kaolin and water into a stirring device, and stirring and dispersing uniformly to obtain a suspension;
(2) Adding expanded graphite into the suspension, heating to 50-100 ℃, stirring uniformly, rapidly cooling to 0-4 ℃, obtaining a mixed solution, and conveying to stirring equipment;
(3) Filtering the mixed solution to obtain filter residues, and drying to obtain expanded graphite loaded with nano kaolin;
b. crushing: unpacking wood pulp and wood powder, adding the unpacked wood pulp and wood powder into stirring equipment, sieving and stirring the unpacked wood pulp and the expanded graphite loaded with nano kaolin, adding calcium hydroxide, asphalt powder and a dispersing agent, uniformly mixing to obtain mixed powder, heating the mixed powder under the stirring condition at normal temperature for 8-12min until the mixed powder is heated and melted, and adding the mixed powder into a screw conveyor;
c. post-treatment: controlling the temperature of each region of the spiral conveyor, extruding and granulating to obtain lignin fibers, wherein the temperature of the first region is 110-120 ℃, the temperature of the second region is 120-135 ℃, and the temperature of the third region is 100-105 ℃;
d. and (3) packaging: and compressing the finished product into blocks by using a compressor, and then carrying out vacuum packaging.
The application also provides stirring equipment used in the preparation method of the road lignin fiber, which comprises a mixing tank and a stirring tank, wherein an annular screening cavity and a stirring cavity are respectively formed in the mixing tank from top to bottom, and the stirring equipment also comprises an auxiliary mechanism arranged in the mixing tank; the auxiliary mechanism comprises;
the stirring assembly comprises a rotating shaft which axially penetrates through the center of the annular screening cavity and extends to the inside of the stirring cavity, and a stirring rod which is uniformly fixed on the rotating shaft and is positioned in the stirring cavity;
the screening assembly comprises a sphere which is positioned in the center of the annular screening cavity and fixed on the rotating shaft, and a screening piece which is arranged in the annular screening cavity; the horizontal plane passing through the sphere center of the sphere is taken as a set plane, and the screening piece is matched with the sphere and can rotate in a plane which is perpendicular to the set plane and takes the sphere as the center of a circle; the screening assembly further comprises a pushing piece which is slidably connected to the rotating shaft, the pushing piece is located below the screening piece, when the rotating shaft rotates, the pushing piece can push the screening piece to rotate in a direction away from the pushing piece, and the screening assembly further comprises a reset spring which provides damping when the screening piece rotates.
Preferably, the annular screening cavity is outwards recessed to form an arc surface, the arc surface is on a spherical surface taking a sphere as a sphere center, and the outer side wall of the screening piece is attached to the arc surface.
Preferably, a slag discharging pipe is arranged on the side wall of the mixing tank on one side of the annular screening cavity, a feeding pipe is arranged on the side wall of the mixing tank, and the feeding pipe is located on one side of the top of the annular screening cavity.
Preferably, the auxiliary mechanism further comprises a heat preservation tank, an electric heating pipe is arranged inside the heat preservation tank, discharge ports are formed in two sides of the inner wall of the heat preservation tank, a drain pipe is arranged on one side of the inner wall of the mixing tank, and a filter plug is arranged inside the drain pipe.
Preferably, the auxiliary mechanism further comprises a screw conveyor, a screw conveying paddle is arranged in the screw conveyor, and an extrusion pipe is arranged on one side of the outer wall of the screw conveyor.
Preferably, the screening piece includes screening board, evenly be provided with screening hole on the screening board, reset spring's quantity sets up to a plurality of, reset spring evenly is annular evenly distributed between screening board and insulation can.
Preferably, the quantity of puddler sets up to the multiunit, and one of them puddler outer wall activity has cup jointed solid fixed ring, gu fixed ring inside level is provided with the lantern ring, the equal fixedly connected with guide block in lantern ring outer wall both sides, guide block and solid fixed ring inner wall fixed connection.
Preferably, one the puddler is inside to be equipped with the dead lever, the spout has all been seted up to puddler inner wall both sides, lantern ring and dead lever sliding connection, the guide block run through the spout and with spout sliding connection, compression spring has all been cup jointed to the activity of dead lever outer wall both sides, compression spring symmetry sets up in lantern ring outer wall both sides.
Preferably, the outer wall sleeve of the abutting piece is provided with a limit sleeve, the bottom of the limit sleeve is fixedly connected with the fixed ring, the inner wall of the limit sleeve is provided with a guide groove, the top of the abutting piece is provided with a hairbrush, two sides of the outer wall of the abutting piece are fixedly connected with limiting blocks, and the limiting blocks are in sliding connection with the guide groove.
Preferably, the axis department of agitator tank is equipped with the screw stirring rake, the inside heating member that is equipped with of agitator tank, the agitator tank bottom is equipped with the refrigerator, agitator tank inner wall one side is equipped with the feeding pipe, agitator tank top one side is equipped with the water injection pipe, be equipped with the aqueduct between agitator tank and the blending tank.
Compared with the prior art, the technical scheme has the following beneficial effects:
according to the application, the wood pulp and the wood powder with high ignition points are adopted, the calcium hydroxide is adopted as the flame retardant, the expanded graphite is adopted as the carbon source and is also the heat insulation layer, so that the flame retardant property of the lignin fiber can be effectively and obviously improved, and meanwhile, the screening component and the stirring component are mutually matched to enable the interference component to push the screening component to rotate in the direction away from the interference component, so that the screening component can vibrate rapidly, the quality of the mixed powder can be effectively improved, the production efficiency and the working efficiency are greatly improved, the mixed powder is fully stirred, and after the mixed powder is matched for use, the synergistic effect is achieved, and the flame retardant property of the lignin fiber can be obviously enhanced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
FIG. 1 is a cross-sectional view of the overall structure of the present application;
FIG. 2 is a perspective view of the overall structure of the present application;
FIG. 3 is a top view in section of a screen member and annular screen chamber of the present application;
FIG. 4 is a schematic view of a partial construction of a screen member and annular screen chamber of the present application;
FIG. 5 is a schematic view of a connection structure of a fixing ring and a contact member according to the present application;
FIG. 6 is a cross-sectional view of the internal structure of the screw conveyor of the present application;
fig. 7 is an enlarged view of the structure of fig. 1 at a in accordance with the present application.
In the figure:
1. a mixing tank; 101. an auxiliary mechanism; 102. a stirring assembly; 103. a screen assembly; 2. an annular screening cavity; 3. a stirring cavity; 4. a rotating shaft; 5. a stirring rod; 51. a fixed rod; 52. a chute; 53. a compression spring; 6. a sphere; 7. a screening element; 71. a screening plate; 72. screening holes; 8. a contact member; 81. a brush; 82. a limiting block; 9. a return spring; 10. a drain pipe; 11. a feed pipe; 12. a heat preservation tank; 13. a limit sleeve; 131. a guide groove; 14. a fixing ring; 141. a collar; 142. a guide block; 15. an electric heating tube; 16. a discharge port; 17. a slag discharge pipe; 18. a screw conveyor; 181. screw conveying paddles; 182. extruding a pipe; 19. a stirring tank; 191. screw stirring paddles; 192. a heating member; 193. a refrigerator; 194. a feed conduit; 195. a water injection pipe; 196. a water conduit; 20. and (5) a filter plug.
Detailed Description
In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the application herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present application and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.
Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present application will be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, the terms "mounted," "configured," "provided," "connected," "coupled," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
The preparation method of the road lignin fiber comprises the following raw materials in percentage by weight:
35% of wood pulp;
40% of wood powder;
10% of calcium hydroxide;
12% of asphalt powder;
1.5% of dispersant;
1% of expanded graphite;
wherein the lignin fiber further comprises 0.8% basalt fiber;
wherein nanometer kaolin is loaded in micropores of the expanded graphite;
wherein the mass ratio of the expanded graphite to the nano kaolin is 1:0.1-0.2;
the manufacturing method of the road lignin fiber comprises the following steps:
a. preparing materials: (1) Adding nano kaolin and water into a stirring device, and stirring and dispersing uniformly to obtain a suspension;
(2) Adding expanded graphite into the suspension, heating to 50-100 ℃, stirring uniformly, rapidly cooling to 0-4 ℃, obtaining a mixed solution, and conveying to stirring equipment;
(3) Filtering the mixed solution to obtain filter residues, and drying to obtain expanded graphite loaded with nano kaolin;
the wood pulp is paper pulp prepared by taking wood as a raw material, the wood powder is leftover materials of wood processing in sawmills, furniture factories, density board factories and multi-layer board factories, the ignition point of the wood pulp and the wood powder is 180 ℃, the thermal decomposition temperature of calcium hydroxide is higher and can reach more than 800 ℃, the flame retardant property can be improved, micropores of the expanded graphite expand slightly under heating conditions, nano kaolin is easier to enter the micropores, when the nano kaolin enters the micropores of the expanded graphite, the micropores shrink when the nano kaolin is rapidly cooled, the nano kaolin is prevented from separating from the micropores when the nano kaolin is subsequently centrifuged, and the nano kaolin is heated to 50-100 ℃ and cooled to 0-4 ℃; the larger temperature difference can lead the micropores of the expanded graphite to be enlarged and then smaller.
b. Crushing: unpacking wood pulp and wood powder, adding the unpacked wood pulp and wood powder into stirring equipment, sieving and stirring the unpacked wood pulp and the expanded graphite loaded with nano kaolin, adding calcium hydroxide, asphalt powder and a dispersing agent, uniformly mixing to obtain mixed powder, heating the mixed powder under the stirring condition at normal temperature for 8-12min until the mixed powder is heated and melted, and adding the mixed powder into a screw conveyor;
C. post-treatment: controlling the temperature of each region of the spiral conveyor, extruding and granulating to obtain lignin fibers, wherein the temperature of the first region is 110-120 ℃, the temperature of the second region is 120-135 ℃, and the temperature of the third region is 100-105 ℃;
d. and (3) packaging: and compressing the finished product into blocks by using a compressor, and then carrying out vacuum packaging.
By adopting wood pulp and wood powder with high ignition point, adopting calcium hydroxide as a flame retardant, adopting expanded graphite as a carbon source and adopting a heat insulation layer, the heat insulation can be effectively realized, and the flame retardant property of lignin fiber is obviously improved; the expanded graphite has a loose porous structure and strong adsorption capacity to organic compounds, the high oil absorption rate of the expanded graphite enables the asphalt membrane to be in a relatively stable state, particularly in summer high-temperature seasons, when asphalt is heated and expanded, the internal gaps of the expanded graphite, wood pulp and wood powder are also used as a buffer room, free asphalt is prevented from becoming oil-flooding, the stability at high temperature is improved, the expanded graphite is matched with the wood pulp and wood powder to play a role in tackifying, the adhesiveness of asphalt and mineral aggregate is improved, the adhesion between aggregates is improved through the adhesion of an oil film, and the nano kaolin not only has fireproof flame retardant property, but also can be matched with the expanded graphite to play a role in oil absorption.
As shown in fig. 1 to 7, in this embodiment, the stirring apparatus in the step of manufacturing the road lignin fiber includes a mixing tank 1 and a stirring tank 19, wherein an annular sieving chamber 2 and a stirring chamber 3 are respectively formed inside the mixing tank 1 from top to bottom, and the stirring apparatus further includes an auxiliary mechanism 101 disposed inside the mixing tank 1; the auxiliary mechanism 101 includes;
a mixing tank 1 having an annular screening chamber 2 and a stirring chamber 3 for screening and stirring, and for preparing lignin fibers;
a stirring assembly 102 comprising a rotating shaft 4 axially penetrating the center of the annular screening cavity 2 and extending into the stirring cavity 3, and a stirring rod 5 uniformly fixed on the rotating shaft 4, wherein the stirring rod 5 is positioned in the stirring cavity 3;
a rotating shaft 4 provided with stirring rods 5 fixed on two sides of the outer wall, wherein the stirring rods 5 are positioned in the stirring cavity 3;
a screening assembly 103 comprising a ball 6 located in the centre of said annular screening chamber 2 and fixed on a rotation shaft 4 and a screening member 7 arranged inside the annular screening chamber 2; the horizontal plane passing through the sphere center of the sphere 6 is taken as a set plane, and the screening piece 7 is matched with the sphere 6 and can rotate in a plane perpendicular to the set plane by taking the sphere 6 as a circle center; the screening assembly 103 further comprises a contact member 8 slidably connected to the rotation shaft 4, the contact member 8 is located below the screening member 7, when the rotation shaft 4 rotates, the contact member 8 can push the screening member 7 to rotate in a direction away from the contact member 8, and the screening assembly 103 further comprises a return spring 9 providing damping when the screening member 7 rotates.
Adding nano kaolin and water into a stirring tank 19, stirring and dispersing uniformly, heating and rapidly cooling to obtain mixed liquid, then inputting the mixed liquid into the mixing tank 1, filtering the mixed liquid to obtain filter residues, drying to obtain expanded graphite loaded with nano kaolin, unpacking wood pulp and wood powder into stirring equipment, sieving the wood pulp and the wood powder with the expanded graphite loaded with nano kaolin, then starting a driving assembly to drive a rotating shaft 4 to rotate, so that the rotating shaft 4 rotates and simultaneously drives a stirring rod 5 to rotate, simultaneously, a collision piece 8 on the outer wall of the stirring rod 5 slides on the outer wall of the stirring rod 5 and can rotate in a plane vertical to a set plane by taking a sphere 6 as a circle center, further the collision piece 8 can push a sieving piece 7 to rotate in a direction away from the collision piece 8, and thus the sieving piece 7 rapidly vibrates, the screening piece 7 is enabled to carry out high-frequency vibration screening on mixed powder, the screening effect is effectively improved, then calcium hydroxide, asphalt powder and dispersing agent are added and mixed uniformly, the obtained mixed powder is continuously stirred uniformly, the reset spring 9 is arranged in a staggered manner through the mutual matching of the reset spring 9 and the screening piece 7, the screening piece 7 is enabled to incline towards the slag discharging pipe 17, when the impurity at the top of the screening piece 7 and the mixed powder are screened, the impurity accumulation weight enables the screening piece 7 to extrude the reset spring 9 to be pressed down to the opening of the slag discharging pipe 17, the impurity is cleaned, the powder is enabled to be finer by rotating and screening, the vibration property is strong, the screening speed is high, the quality of the mixed powder can be effectively improved, the production efficiency and the working efficiency are greatly improved, meanwhile, the stirring rod 5 is enabled to complete moving along the direction vertical to the axis in the rotating process when the rotating shaft 4 rotates, the turbulent flow can be formed in the mixing tank 1, the mixing effect and the mixing efficiency are improved, so that the preparation efficiency of the lignin fiber is improved, meanwhile, the mixed powder is fully stirred, and after the wood powder, the wood pulp, the calcium hydroxide and the expanded graphite are matched for use, the synergistic effect is achieved, and the flame retardant property of the lignin fiber can be obviously enhanced.
In this embodiment, annular screening chamber 2 outwards sunken formation cambered surface, the cambered surface is on taking spheroid 6 as the sphere of sphere center, screening piece 7's lateral wall and cambered surface laminating make screening piece 7 in screening filterable in-process, offset with the cambered surface and avoid leaking the condition to appear, make screening piece 7 rotate simultaneously and sieve time more nimble.
In this embodiment, the mixing tank 1 lateral wall of annular screening chamber 2 one side is provided with scum pipe 17, mixing tank 1 lateral wall is provided with inlet pipe 11, inlet pipe 11 is located annular screening chamber 2 top one side, drops into the impurity after screening of screening piece 7 top through inlet pipe 11 with the mixed powder and discharges from scum pipe 17, is convenient for clear up the impurity, prevents that the impurity from piling up.
In this embodiment, the auxiliary mechanism 101 further comprises a heat preservation tank 12, an electric heating tube 15 is arranged inside the heat preservation tank 12, discharge ports 16 are formed in two sides of the inner wall of the heat preservation tank 12, a drain pipe 10 is arranged on one side of the inner wall of the mixing tank 1, a filter plug 20 is arranged inside the drain pipe 10, heat generated by the electric heating tube 15 is conducted to the inside of the stirring cavity 3 through the heat preservation tank 12, mixed powder is heated during stirring, and molecules in the mixed powder are accelerated through heating and stirring the mixed powder in the stirring cavity 3, so that various mixed powders are promoted to be mixed faster and more fully.
In this embodiment, the auxiliary mechanism 101 further includes a screw conveyor 18, a screw conveyor paddle 181 is disposed inside the screw conveyor 18, an extrusion pipe 182 is disposed on one side of an outer wall of the screw conveyor 18, the processed mixed powder is conveyed to the inside of the screw number machine 18 through the discharge pipe 17 and then conveyed to the feed cylinder 181 for partition extrusion, wherein the temperature of one area is 110-120 ℃, the temperature of the other area is 120-135 ℃, the temperature of the other area is 100-105 ℃, granular lignin fibers can be obtained without scattering during use, and the method is easy to disperse and convenient to use.
In this embodiment, the screening member 7 includes a screening plate 71, screening holes 72 are uniformly provided on the screening plate 71, the number of the return springs 9 is plural, and the return springs 9 are uniformly distributed between the screening plate 71 and the insulation can 12 in a ring shape.
In this embodiment, the quantity of puddler 5 sets up to the multiunit, and fixed ring 14 has been cup jointed in the activity of one of them puddler 5 outer wall, fixed ring 14 inside level is provided with the lantern ring 141, the equal fixedly connected with guide block 142 in lantern ring 141 outer wall both sides, guide block 142 and fixed ring 14 inner wall fixed connection, the centrifugal force that produces when the high-speed operation of axis of rotation 4 drives fixed ring 14 one the gliding while of puddler 5 outer wall drives conflict piece 8 and carries out the irregular slip in screening board 71 bottom to make the vibrations swing of screening board 71 bigger, thereby carry out the screening of high frequency to the mixed powder, the setting of lantern ring 141 and guide block 142 carries out effective spacing to the slip direction of fixed ring 14 simultaneously.
In this embodiment, a dead lever 51 is provided inside the puddler 5, spout 52 has all been seted up to puddler 5 inner wall both sides, lantern ring 141 and dead lever 51 sliding connection, guide block 142 run through spout 52 and with spout 52 sliding connection, compression spring 53 has all been movably cup jointed to dead lever 51 outer wall both sides, compression spring 53 symmetry sets up in lantern ring 141 outer wall both sides, through compression spring 53's setting, makes solid fixed ring 14 one according to the size of the centrifugal force of axis of rotation 4 when puddler 5 outer wall slides for compression spring 53 extrudes lantern ring 141 and resets conflict 8.
In this embodiment, conflict 8 outer wall cover is equipped with spacing sleeve 13, spacing sleeve 13 bottom and solid fixed ring 14 fixed connection, spacing sleeve 13 inner wall is equipped with guide way 131, conflict 8 top is equipped with brush 81, the equal fixedly connected with stopper 82 in conflict 8 outer wall both sides, stopper 82 and guide way 131 sliding connection are through the brush 81 that sets up at conflict 8 top and the inside screening hole 72 phase-match of screening board 71 to clear up the powder and caking of screening board 71 inside, cooperate compression spring 53 simultaneously, and the brush 81 at conflict 8 top can be cleared up along screening board 71 bottom in irregular trend, thereby has improved the screening filter effect of screening board 71 by a wide margin.
In this embodiment, a screw stirring paddle 191 is disposed at the central axis of the stirring tank 19, a heating element 192 is disposed inside the stirring tank 19, a refrigerator 193 is disposed at the bottom of the stirring tank 19, a feeding conduit 194 is disposed at one side of the inner wall of the stirring tank 19, a water injection pipe 195 is disposed at one side of the top of the stirring tank 19, a water guide pipe 196 is disposed between the stirring tank 19 and the mixing tank 1, nano kaolin and water are respectively added into the stirring tank 19 through the feeding conduit 194 and the water injection pipe 195, stirring and dispersing are uniformly by the screw stirring paddle 191 to obtain a suspension, then expanded graphite is added into the suspension from the feeding conduit 194, the suspension is heated to a temperature of 50-100 ℃ by the heating element 192, then is rapidly cooled to a temperature of 0-4 ℃ by the refrigerator 193, and the obtained mixture is then conveyed into the mixing tank 1.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A preparation method of a road lignin fiber is characterized by comprising the following steps: the material comprises the following raw materials in percentage by weight:
35% of wood pulp;
40% of wood powder;
10% of calcium hydroxide;
12% of asphalt powder;
1.5% of dispersant;
1% of expanded graphite;
wherein the lignin fiber further comprises 0.8% basalt fiber;
wherein nanometer kaolin is loaded in micropores of the expanded graphite;
wherein the mass ratio of the expanded graphite to the nano kaolin is 1:0.1-0.2;
the manufacturing method of the road lignin fiber comprises the following steps:
a. preparing materials: (1) Adding nano kaolin and water into a stirring device, and stirring and dispersing uniformly to obtain a suspension;
(2) Adding expanded graphite into the suspension, heating to 50-100 ℃, stirring uniformly, rapidly cooling to 0-4 ℃, obtaining a mixed solution, and conveying to stirring equipment;
(3) Filtering the mixed solution to obtain filter residues, and drying to obtain expanded graphite loaded with nano kaolin;
b. crushing: unpacking wood pulp and wood powder, adding the unpacked wood pulp and wood powder into stirring equipment, sieving and stirring the unpacked wood pulp and the expanded graphite loaded with nano kaolin, adding calcium hydroxide, asphalt powder and a dispersing agent, uniformly mixing to obtain mixed powder, heating the mixed powder under the stirring condition at normal temperature for 8-12min until the mixed powder is heated and melted, and adding the mixed powder into a screw conveyor;
c. post-treatment: controlling the temperature of each region of the spiral conveyor, extruding and granulating to obtain lignin fibers, wherein the temperature of the first region is 110-120 ℃, the temperature of the second region is 120-135 ℃, and the temperature of the third region is 100-105 ℃;
d. and (3) packaging: and compressing the finished product into blocks by using a compressor, and then carrying out vacuum packaging.
2. A stirring device used in the method for preparing road lignin fiber according to claim 1, comprising a mixing tank (1) and a stirring tank (19), characterized in that: an annular screening cavity (2) and a stirring cavity (3) are respectively formed in the mixing tank (1) from top to bottom, and the stirring equipment further comprises an auxiliary mechanism (101) arranged in the mixing tank (1); the auxiliary mechanism (101) comprises;
the stirring assembly (102) comprises a rotating shaft (4) which axially penetrates through the center of the annular screening cavity (2) and extends to the inside of the stirring cavity (3) and stirring rods (5) uniformly fixed on the rotating shaft (4), and the stirring rods (5) are positioned in the stirring cavity (3);
a screening assembly (103) comprising a sphere (6) positioned in the center of the annular screening cavity (2) and fixed on the rotating shaft (4) and a screening element (7) arranged inside the annular screening cavity (2); the horizontal plane passing through the sphere center of the sphere (6) is taken as a set plane, and the screening piece (7) is matched with the sphere (6) and can rotate in a plane which is perpendicular to the set plane and takes the sphere (6) as the circle center; screening subassembly (103) still includes interference piece (8) of sliding connection on axis of rotation (4), interference piece (8) are located screening piece (7) below when axis of rotation (4) rotate, interference piece (8) can promote screening piece (7) to rotate towards keeping away from interference piece (8) direction, screening subassembly (103) still include provide damped reset spring (9) when screening piece (7) take place to rotate.
3. The stirring device of claim 2, wherein: the annular screening cavity (2) is outwards sunken to form an arc surface, the arc surface is on the sphere with the sphere (6) as the centre of sphere, and the lateral wall of screening part (7) is laminated with the arc surface.
4. The stirring device of claim 2, wherein: the mixing tank is characterized in that a slag discharging pipe (17) is arranged on the side wall of the mixing tank (1) on one side of the annular screening cavity (2), a feeding pipe (11) is arranged on the side wall of the mixing tank (1), and the feeding pipe (11) is located on one side of the top of the annular screening cavity (2).
5. The stirring device of claim 2, wherein: the auxiliary mechanism (101) further comprises a heat preservation tank (12), an electric heating tube (15) is arranged inside the heat preservation tank (12), discharge ports (16) are formed in two sides of the inner wall of the heat preservation tank (12), a drain pipe (10) is arranged on one side of the inner wall of the mixing tank (1), and a filter plug (20) is arranged inside the drain pipe (10).
6. The stirring device of claim 2, wherein: the auxiliary mechanism (101) further comprises a screw conveyor (18), a screw conveying paddle (181) is arranged inside the screw conveyor (18), and an extrusion pipe (182) is arranged on one side of the outer wall of the screw conveyor (18).
7. The stirring device of claim 2, wherein: the screening piece (7) comprises a screening plate (71), screening holes (72) are uniformly formed in the screening plate (71), the number of the reset springs (9) is multiple, and the reset springs (9) are uniformly distributed between the screening plate (71) and the heat preservation tank (12) in an annular and uniform mode.
8. The stirring device of claim 2, wherein: the quantity of puddler (5) sets up to the multiunit, and fixed ring (14) have been cup jointed in the activity of one of them puddler (5) outer wall, fixed ring (14) inside level is provided with lantern ring (141), equal fixedly connected with guide block (142) in lantern ring (141) outer wall both sides, guide block (142) and fixed ring (14) inner wall fixed connection.
9. The stirring device of claim 8, wherein: one puddler (5) inside is equipped with dead lever (51), spout (52) have all been seted up to puddler (5) inner wall both sides, lantern ring (141) and dead lever (51) sliding connection, guide block (142) run through spout (52) and with spout (52) sliding connection, compression spring (53) have all been cup jointed in activity to dead lever (51) outer wall both sides, compression spring (53) symmetry sets up in lantern ring (141) outer wall both sides.
10. The stirring device of claim 9, wherein: the outer wall of the abutting piece (8) is sleeved with a limit sleeve (13), the bottom of the limit sleeve (13) is fixedly connected with a fixed ring (14), a guide groove (131) is formed in the inner wall of the limit sleeve (13), a hairbrush (81) is arranged at the top of the abutting piece (8), limit blocks (82) are fixedly connected to two sides of the outer wall of the abutting piece (8), and the limit blocks (82) are slidably connected with the guide groove (131);
the utility model discloses a stirring tank, including agitator tank (19), agitator tank (19) axis department is equipped with screw stirring rake (191), agitator tank (19) inside is equipped with heating element (192), agitator tank (19) bottom is equipped with refrigerator (193), agitator tank (19) inner wall one side is equipped with feed conduit (194), agitator tank (19) top one side is equipped with water injection pipe (195), be equipped with aqueduct (196) between agitator tank (19) and the agitator tank (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210235223.0A CN116731528A (en) | 2022-03-02 | 2022-03-02 | Preparation method of road lignin fiber |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210235223.0A CN116731528A (en) | 2022-03-02 | 2022-03-02 | Preparation method of road lignin fiber |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116983898A (en) * | 2023-09-26 | 2023-11-03 | 呼伦贝尔安泰热电有限责任公司满洲里热电厂 | Storage stirring device for fuel coal assay of power plant |
| CN117225700A (en) * | 2023-11-14 | 2023-12-15 | 江苏上阳金属新材料有限公司 | Copper powder screening and recycling device |
-
2022
- 2022-03-02 CN CN202210235223.0A patent/CN116731528A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116983898A (en) * | 2023-09-26 | 2023-11-03 | 呼伦贝尔安泰热电有限责任公司满洲里热电厂 | Storage stirring device for fuel coal assay of power plant |
| CN116983898B (en) * | 2023-09-26 | 2023-12-05 | 呼伦贝尔安泰热电有限责任公司满洲里热电厂 | Storage stirring device for fuel coal assay of power plant |
| CN117225700A (en) * | 2023-11-14 | 2023-12-15 | 江苏上阳金属新材料有限公司 | Copper powder screening and recycling device |
| CN117225700B (en) * | 2023-11-14 | 2024-03-29 | 江苏上阳金属新材料有限公司 | Copper powder screening and recycling device |
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