CN114249856A - Preparation process of acrylic emulsion - Google Patents
Preparation process of acrylic emulsion Download PDFInfo
- Publication number
- CN114249856A CN114249856A CN202111631934.1A CN202111631934A CN114249856A CN 114249856 A CN114249856 A CN 114249856A CN 202111631934 A CN202111631934 A CN 202111631934A CN 114249856 A CN114249856 A CN 114249856A
- Authority
- CN
- China
- Prior art keywords
- drying
- acrylic emulsion
- drying box
- pipe
- cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1802—C2-(meth)acrylate, e.g. ethyl (meth)acrylate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/16—Evaporating by spraying
- B01D1/18—Evaporating by spraying to obtain dry solids
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
The invention discloses a preparation process of acrylic emulsion, which comprises the following steps: s1: preparing ethyl acrylate and ethyl methacrylate as monomer raw materials; s2: adding ethyl acrylate and ethyl methacrylate into a reaction kettle, and adding an olefine acid aqueous solution for mixing reaction; s3: after the reaction in the step S2 is finished, adding deionized water and an emulsifier into the reaction kettle continuously for an emulsification reaction; s4: introducing the prepared emulsion into a drying device for drying treatment; the drying device in the step S4 comprises a drying oven, wherein the bottom of the drying oven is connected with a liquid inlet pipe; further comprising: the first motor is installed on the outer side of the middle part of the drying box in an embedded mode. According to the preparation process of the acrylic emulsion, when the acrylic emulsion is dried, the emulsion sprayed by atomization is ensured to be uniformly dried, the agglomeration and the adhesion of the inner wall can be avoided, and meanwhile, the powder and the air are conveniently separated.
Description
Technical Field
The invention relates to the technical field of preparation of acrylic emulsion, in particular to a preparation process of acrylic emulsion.
Background
The acrylic emulsion is an emulsion prepared by copolymerizing acrylic monomers, has excellent performance and wide application range, is suitable for formulas of various coatings, and is prepared into powder by spray drying in the preparation process of the acrylic emulsion, so that the subsequent storage and use are convenient, but the existing preparation process of the acrylic emulsion has the following problems in use:
the existing acrylic emulsion preparation process mainly carries out drying operation through hot air when entering spray drying, but emulsion discharged due to spraying is scattered, is easy to adhere to the inner wall, is not sufficiently dried and is easy to form caking, and is inconvenient to prepare stable powder on the basis of avoiding adhesion.
In order to solve the problems, innovative design based on the original acrylic emulsion preparation process is urgently needed.
Disclosure of Invention
The invention aims to provide a preparation process of acrylic emulsion, which aims to solve the problems that the existing preparation process of acrylic emulsion in the background technology is inconvenient to prepare stable powder on the basis of avoiding adhesion and is inconvenient to directly carry out one-time collection operation through a cloth bag structure.
In order to achieve the purpose, the invention provides the following technical scheme: a preparation process of acrylic emulsion comprises the following steps:
s1: preparing ethyl acrylate and ethyl methacrylate as monomer raw materials, and adding an emulsifier, an olefine acid aqueous solution, an initiator and deionized water;
s2: adding ethyl acrylate and ethyl methacrylate into a reaction kettle, and adding an olefine acid aqueous solution for mixing reaction to dissolve the ethyl acrylate and the ethyl methacrylate into the olefine acid aqueous solution;
s3: after the reaction in the step S2 is finished, adding deionized water and an emulsifier into the reaction kettle continuously for an emulsification reaction, keeping the temperature at 70-90 ℃ for 1h, and then adding an initiator, keeping the temperature at 80-100 ℃ for 0.8 h;
s4: the prepared emulsion is introduced into a drying device for drying treatment to prepare acrylic acid particles which are convenient for subsequent storage and use;
the drying device in the step S4 includes a drying oven, a liquid inlet pipe is connected to the bottom of the drying oven, an atomizer is installed at one end of the liquid inlet pipe, the atomizer is oppositely and obliquely arranged inside the drying oven, a partition plate is fixed to the top of the drying oven, and a temperature sensor is installed at the bottom of the partition plate;
further comprising:
the drying box comprises a drying box body, a first motor, a second motor, a guide gear, a drying cylinder, a rack-shaped structure, a grinding body and a grinding head, wherein the first motor is installed on the outer side of the middle part of the drying box in an embedded mode, the output end of the first motor is connected with the guide gear, one side of the guide gear is provided with the drying cylinder, the outer side of the top of the drying cylinder is in meshing contact with the guide gear through the rack-shaped structure arranged at equal angles, the drying cylinder is movably installed on the inner wall of the middle part of the drying box in an embedded mode, the inner wall of the drying cylinder is provided with an air guide hole, the outer side of the drying box is respectively provided with a first hot air pipe, a second hot air pipe and a cold air pipe in a penetrating mode from bottom to top, the opening at the bottom of the drying box is movably installed with the grinding body in an embedded mode, and the grinding head is fixed on the outer side of the grinding body and the inner wall of the opening at the bottom of the drying box;
the discharging pipe, discharging pipe through connection is in the top edge of drying cabinet, and the bottom activity of discharging pipe runs through the cover and is equipped with the installation pipe, the outside inboard of discharging pipe is fixed with the second motor, and the output of second motor is connected with loose gear to one side meshing of loose gear has the tooth cover, and the top position at the installation pipe is established to the tooth cover moreover, movable mounting is run through to the bottom of installation pipe has the sack cylinder, and the below of sack cylinder is provided with the guide frame to the bottom of guide frame is passed through installation pole fixed connection in the bottom outside of drying cabinet, bevel gear is all installed at the top of guide frame and the top of sack cylinder, and intermeshing between bevel gear on the guide frame and the bevel gear on the sack cylinder.
Preferably, the weight parts of the ethyl acrylate, the ethyl methacrylate, the emulsifier, the olefine acid aqueous solution, the initiator and the deionized water are respectively 10-25 parts, 20-30 parts, 10-15 parts, 5-10 parts and 20-25 parts.
Preferably, the installation is rotated in the embedded laminating of drying cylinder in the drying cabinet, and the bottom of drying cylinder is fixed with the ring gear to the inboard meshing of ring gear has the fluted roller, and fluted roller and the equal embedded movable mounting of ring gear are in the drying cabinet, are connected with the belt between the bottom of fluted roller and rinding body simultaneously, and the rotation of drying cylinder drives the fluted roller through the ring gear and rotates, passes through the belt drive rinding body by the fluted roller and rotates.
Preferably, the inner wall of the drying cylinder is designed to be a convex spiral mechanism, the air guide holes in the spiral structure on the inner wall of the drying cylinder are distributed at equal angles, the air guide holes are designed to be inclined structures, air guide channels are arranged on the outer side and the inner portion of the middle of the drying cylinder, hot air blown out from the second hot air pipe is slowly blown out from the air guide holes through the drying cylinder, the hot air is matched with the rotation of the drying cylinder to form turbulent air, the emulsion is dried again, and meanwhile, the falling time of the emulsion is slowed down.
Preferably, the cold air pipe and the second hot air pipe are vertically communicated with each other to be provided with an air exchange pipe, the air exchange pipe and the second hot air pipe are respectively provided with a control valve, the temperature sensor senses that the internal temperature is too high, the control valve on the air exchange pipe is opened, and the control valve on the second hot air pipe is closed, so that cold air in the cold air pipe can be blown to the drying cylinder and is guided out through the air guide hole to cool the inside.
Preferably, the top of rinding body is round platform type structural design, and the avris of rinding body is parallel to each other with drying cabinet bottom opening part, and the rotation of rinding body can guide the powder that drops.
Preferably, the grinding heads are circumferentially distributed on the outer side of the grinding body and the inner wall of the bottom of the drying box at equal intervals, the grinding heads on the inner wall of the bottom of the drying box and the outer side of the grinding body are distributed in a staggered mode, and the rotation of the grinding body is matched with the grinding heads to grind the powder which is bonded and falls.
Preferably, the cloth bag separating cylinder is of an inclined structure and is distributed at the bottom of the mounting pipe at equal angles, the bottom of the cloth bag separating cylinder is of a closed plastic bag structure, a sealing cover structure is arranged at the bottom of the cloth bag separating cylinder, the cloth bag separating cylinder rotates obliquely and revolves and rotates to perform centrifugal separation on the air and the powder inside, so that the powder can enter the bottom of the cloth bag separating cylinder to be collected and taken out through the sealing cover.
Preferably, the two guide frames are arranged in the length direction of the cloth bag separating cylinder in the up-down direction, the lateral sides of the guide frames are designed to be of an inwards-concave annular structure, the cloth bag separating cylinder revolves and rotates outside the guide frames and is guided by the shape of the guide frames, so that the cloth bag separating cylinder can be in contact with the guide frames to shake and vibrate, and blockage in the cloth bag separating cylinder is effectively avoided.
Preferably, the acrylic emulsion is prepared by any one of the above acrylic emulsion preparation processes, and the components and the parts by weight of the acrylic emulsion comprise 10-25 parts by weight of ethyl acrylate, 20-30 parts by weight of ethyl methacrylate, 10-15 parts by weight of an emulsifier, 10-15 parts by weight of an olefine acid aqueous solution, 5-10 parts by weight of an initiator and 20-25 parts by weight of deionized water.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention is provided with a multi-stage drying mechanism and atomizing nozzles which are obliquely arranged in opposite directions, emulsion can be atomized and sprayed in a drying box in an arc-shaped stroke, the width of the drying box is increased to reserve a space for spraying the emulsion, the emulsion is prevented from being directly sprayed on the inner wall of the drying box, the condition that the atomized emulsion is contacted with each other in advance and is bonded is also avoided, anti-bonding coating is not required to be sprayed on the inner wall of the drying box, resources are saved, the phenomenon that the coating is melted due to high internal temperature is avoided, the maintenance cost is reduced, primary drying can be carried out through heat accumulated in the drying box at the initial position of spraying the emulsion, hot air slowly guided out by a second hot air pipe is obliquely blown out through an air guide hole through a hollow drying cylinder, meanwhile, the drying cylinder can be stressed to rotate in the drying box, and the hot air is slowly obliquely blown out and forms turbulent flow in the drying box by matching with a spiral structure on the inner wall of the drying cylinder, the detention time of the primarily dried emulsion in the air is prolonged, the drying effect is further improved, the emulsion which is not dried is prevented from falling in the arc section stroke, meanwhile, the atomized emulsion can be prevented from being adhered to the inner wall of the drying cylinder, the emulsion which is dried for the second time is dried by hot air blown out from the bottom by the first hot air pipe in a matched mode, the dried emulsion is blown to the top of the drying box, negative pressure is formed at the top of the drying box by cold air blown out from the cold air pipe, hot air carries completely dried powder to enter the top of the partition board and is cooled rapidly by the cold air, the condition that the subsequent powder is continuously hot and is adhered is avoided, meanwhile, when the internal temperature is too high, the cold air in the cold air pipe enters the drying cylinder by opening and closing control valves on the air exchange pipe and the second hot air pipe, and the interior of the drying box is cooled;
2. according to the invention, the grinding mechanism is arranged, a small amount of emulsion which is bonded in the air falls to the bottom of the drying oven through gravity, the inclined plane at the bottom of the drying oven guides the emulsion to a gap between the grinding body and the bottom of the drying oven, the grinding body is driven to rotate through the gear ring, the gear roller and the belt by the rotation of the drying drum, the grinding body in a circular truncated cone structure guides powder, and the grinding heads which are distributed in a staggered manner are matched for grinding the powder, so that a small amount of bonded powder is ground into fine powder, the bonding influence on the powder forming effect is avoided, the multistage drying structure is matched, the atomized emulsion drying effect is effectively improved, and the powder with higher fineness can be prepared under the condition that an anti-caking agent is not required to be added;
3. the invention is provided with an integrated separating mechanism, a cloth bag separating cylinder is movably arranged at the bottom of an installation pipe through equal-angle inclination, the upper part of the cloth bag separating cylinder adopts a cloth bag filtering material and is used for carrying out centrifugal filtering separation on air and powder, the bottom of the cloth bag separating cylinder adopts a closed plastic bag material and can collect the powder, a second motor drives the installation pipe to rotate through a movable gear and a gear sleeve so as to further drive a plurality of inclined cloth bag separating cylinders to rotate, and simultaneously, the cloth bag separating cylinder can carry out revolution and rotation by matching with the use of a bevel gear, the powder and the air can be separated to the bottom position of the cloth bag separating cylinder for storage while being centrifugally separated through the rotation of the inclined cloth bag separating cylinder, the trouble of carrying out multiple operations by using a cyclone separator and a cloth bag dust remover is avoided, and simultaneously, the cloth bag separating cylinder guides the revolution and the rotation outside a frame, the concave-convex structure outside the guide frame is matched, the cloth bag separating cylinder can be in contact with the guide frame in the rotation process, the guide frame guides the position, the shaking and the vibration of the cloth bag separating cylinder in the rotation process are realized, the blockage of the cloth bag separating cylinder is effectively avoided, the long-acting separation operation can be carried out, the trouble that the existing cloth bag separating cylinder needs to be taken down periodically to be cleaned when in use is avoided, the drying efficiency of acrylic emulsion is greatly improved, and the downtime is reduced.
Drawings
FIG. 1 is a schematic front sectional view of the present invention;
FIG. 2 is a schematic top view of the drying cylinder of the present invention;
FIG. 3 is a schematic top view of the ring gear and toothed roller of the present invention;
FIG. 4 is an enlarged view of the structure at A in FIG. 1 according to the present invention;
FIG. 5 is a schematic top view of the guiding frame of the present invention.
In the figure: 1. a drying oven; 2. a liquid inlet pipe; 3. an atomizing spray head; 4. a partition plate; 5. a temperature sensor; 6. a first motor; 7. a lead gear; 8. a drying cylinder; 81. a ring gear; 82. a toothed roller; 83. a belt; 9. a wind guide hole; 10. a first hot air duct; 11. a second hot air duct; 12. a cold air pipe; 121. air pipe replacement; 122. a control valve; 13. a grinding body; 14. a grinding head; 15. a discharge pipe; 16. installing a pipe; 17. a second motor; 18. a movable gear; 19. a gear sleeve; 20. a cloth bag separating cylinder; 21. a bevel gear; 22. mounting a rod; 23. a guide frame.
Detailed Description
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 given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, the present invention provides a technical solution: a preparation process of acrylic emulsion comprises a drying box 1, a liquid inlet pipe 2, an atomizing spray head 3, a partition plate 4, a temperature sensor 5, a first motor 6, a guide gear 7, a drying cylinder 8, a gear ring 81, a gear roller 82, a belt 83, an air guide hole 9, a first hot air pipe 10, a second hot air pipe 11, a cold air pipe 12, an air exchange pipe 121, a control valve 122, a grinding body 13, a grinding head 14, a discharge pipe 15, an installation pipe 16, a second motor 17, a movable gear 18, a gear sleeve 19, a cloth bag separation cylinder 20, a bevel gear 21, an installation rod 22 and a guide frame 23;
example 1
Referring to fig. 1-2, the process for preparing the acrylic emulsion comprises the following steps:
s1: preparing ethyl acrylate and ethyl methacrylate as monomer raw materials, and adding an emulsifier, an olefine acid aqueous solution, an initiator and deionized water;
s2: adding ethyl acrylate and ethyl methacrylate into a reaction kettle, and adding an olefine acid aqueous solution for mixing reaction to dissolve the ethyl acrylate and the ethyl methacrylate into the olefine acid aqueous solution;
s3: after the reaction in the step S2 is finished, adding deionized water and an emulsifier into the reaction kettle continuously for an emulsification reaction, keeping the temperature at 70-90 ℃ for 1h, and then adding an initiator, keeping the temperature at 80-100 ℃ for 0.8 h;
s4: the prepared emulsion is introduced into a drying device for drying treatment to prepare acrylic acid particles which are convenient for subsequent storage and use;
the drying device in the step S4 includes a drying oven 1, the bottom of the drying oven 1 is connected with a liquid inlet pipe 2, one end of the liquid inlet pipe 2 is provided with an atomizing nozzle 3, the atomizing nozzle 3 is oppositely and obliquely arranged inside the drying oven 1, the top of the drying oven 1 is fixed with a partition board 4, and the bottom of the partition board 4 is provided with a temperature sensor 5; further comprising: the drying box comprises a first motor 6, the first motor 6 is installed at the outer side of the middle part of the drying box 1 in an embedded mode, the output end of the first motor 6 is connected with a guide gear 7, one side of the guide gear 7 is provided with a drying cylinder 8, the outer side of the top of the drying cylinder 8 is in meshing contact with the guide gear 7 through a rack-shaped structure arranged at an equal angle, the drying cylinder 8 is movably installed at the inner wall of the middle part of the drying box 1 in an embedded mode, air guide holes 9 are formed in the inner wall of the drying cylinder 8, the outer side of the drying box 1 is respectively provided with a first hot air pipe 10, a second hot air pipe 11 and a cold air pipe 12 in a penetrating mode from bottom to top, the inner wall of the drying cylinder 8 is in a protruding spiral mechanism design, the air guide holes 9 in the spiral structure of the inner wall of the drying cylinder 8 are distributed at an equal angle, the air guide holes 9 are in an inclined structure design, air guide channels are arranged at the outer side and inside of the middle part of the drying cylinder 8, an air exchange air pipe 121 is vertically arranged between the cold air pipe 12 and the second hot air pipe 11 in a penetrating mode, the air exchange pipe 121 and the second hot air pipe 11 are both provided with a control valve 122, the components and the occupied parts by weight of the acrylic emulsion comprise 10-25 parts by weight of ethyl acrylate, 20-30 parts by weight of ethyl methacrylate, 10-15 parts by weight of emulsifier, 10-15 parts by weight of olefine acid aqueous solution, 5-10 parts by weight of initiator and 20-25 parts by weight of deionized water, the emulsion is sprayed out by an atomizing nozzle 3 and rises and falls in an arc, hot air is slowly blown out by the first hot air pipe 10 in cooperation with a drying cylinder 8 and an air guide hole 9, the hot air is spirally blown out by the rotation of the drying cylinder 8 to form turbulent flow, the retention time of the emulsion in the air is increased, meanwhile, the emulsion is prevented from contacting with the inner wall, the emulsion is further dried by the hot air rapidly blown out by the first hot air pipe 10, and the blown powder is cooled and carried out by cold air blown out by the cold air pipe 12 for subsequent operation, meanwhile, the internal temperature can be detected, and cold air is slowly blown out of the drying oven 1 to be cooled in cooperation with the control valve 122 and the air exchanging pipe 121 at high temperature;
example 2
Referring to fig. 1-4, the grinding body 13 is movably mounted in an embedded manner at the bottom opening of the drying box 1, the grinding head 14 is fixed on the outer side of the grinding body 13 and the inner wall of the bottom opening of the drying box 1, the drying cylinder 8 is rotatably mounted in the drying box 1 in an embedded manner, the bottom of the drying cylinder 8 is fixed with the gear ring 81, the gear ring 81 is engaged with the gear roller 82, the gear roller 82 and the gear ring 81 are movably mounted in the drying box 1 in an embedded manner, the belt 83 is connected between the gear roller 82 and the bottom of the grinding body 13, the top of the grinding body 13 is designed in a circular table structure, the side of the grinding body 13 is parallel to the bottom opening of the drying box 1, the grinding heads 14 are circumferentially distributed at equal intervals on the outer side of the grinding body 13 and the inner wall of the bottom of the drying box 1, the inner wall of the bottom of the drying box 1 and the grinding head 14 on the outer side of the grinding body 13 are alternately distributed, and a small part of powder falls down on the inner wall of the drying box 1 and slides to the gap between the drying box 1 and the grinding body 13 The drying cylinder 8 drives the grinding body 13 to rotate through the gear ring 81, the gear roller 82 and the belt 83, and the grinding head 14 is matched to grind the caking powder;
example 3
Referring to fig. 1 and 5, a discharge pipe 15, the discharge pipe 15 is connected to the top edge of the drying box 1 in a penetrating manner, a mounting pipe 16 is movably sleeved at the bottom of the discharge pipe 15 in a penetrating manner, a second motor 17 is fixed to the inner side of the outer portion of the discharge pipe 15, an output end of the second motor 17 is connected with a movable gear 18, a gear sleeve 19 is meshed with one side of the movable gear 18, the gear sleeve 19 is sleeved at the top of the mounting pipe 16, a cloth bag separating cylinder 20 is movably mounted at the bottom of the mounting pipe 16 in a penetrating manner, a guide frame 23 is arranged below the cloth bag separating cylinder 20, the bottom of the guide frame 23 is fixedly connected to the outer side of the bottom of the drying box 1 through a mounting rod 22, bevel gears 21 are mounted at the top of the guide frame 23 and the top of the cloth bag separating cylinder 20, the bevel gears 21 on the guide frame 23 are meshed with the bevel gears 21 on the cloth bag separating cylinder 20, the cloth bag separating cylinder 20 is in an inclined structure and distributed at the bottom of the mounting pipe 16 at equal angles, the bottom of the cloth bag separating cylinder 20 is of a closed plastic bag structure, the bottom of the cloth bag separating cylinder 20 is provided with a sealing cover structure, two guide frames 23 are arranged up and down along the length direction of the cloth bag separating cylinder 20, and the side of each guide frame 23 is designed to be of an inwards concave annular structure; powder and air enter the cloth bag separating cylinder 20 through the discharge pipe 15 and the mounting pipe 16, the powder and the air are separated through revolution and rotation of the cloth bag separating cylinder 20, meanwhile, the cloth bag separating cylinder 20 is in contact with the guide frame 23, shaking and vibration occur, blocking is avoided, and the powder is directly separated and collected.
The working principle is as follows: when the acrylic emulsion preparation process is used, as shown in fig. 1-4, firstly, emulsion is sprayed into a drying box 1 through a liquid inlet pipe 2 and an atomizing nozzle 3, so that the emulsion is sprayed out in an arc shape in the drying box 1, hot air in the drying box 1 performs primary drying on the emulsion in a fog shape in the middle, meanwhile, the hot air is slowly introduced into a drying cylinder 8 through a second hot air pipe 11, a first motor 6 drives a guide gear 7 to rotate, the guide gear 7 is meshed with the top of the drying cylinder 8, the drying cylinder 8 is driven to rotate in the drying box 1, so that the hot air is uniformly blown out through air guide holes 9 on the drying cylinder 8, hot air is generated in the middle of the drying box 1 by matching with a spiral structure on the inner wall of the drying cylinder 8, when the atomized emulsion is dried, the emulsion can be lifted to a certain degree, the residence time of the emulsion is prolonged, and the drying effect is improved, simultaneously, faster hot air is blown out from the lower part by the first hot air pipe 10, when the emulsion is dried twice, the falling emulsion is dried again, the dried powder is blown upwards, cold air is blown out through the cold air pipe 12, the cold air is blown out transversely in the space formed by the top of the drying box 1 and the partition plate 4, negative pressure is formed at the middle part and the top of the drying box 1, the dried powder is blown to the discharge pipe 15, when the temperature sensor 5 senses that the internal temperature is overhigh, the control valve 122 on the second hot air pipe 11 is closed by the background processor, the control valve 122 on the air exchange pipe 121 is opened, the cold air is blown to the second hot air pipe 11 from the air exchange pipe 121 and is guided out by the drying cylinder 8, the internal cooling treatment is carried out, a small part of the bonded powder falls by gravity and falls to the outside of the grinding body 13 through the inclined surface of the drying box 1, the drying cylinder 8 rotates, and the gear ring 81 is used for reducing the temperature of the powder, The gear roller 82 and the belt 83 drive the grinding body 13 to rotate, and the bonded powder is ground by the grinding body 13 and the grinding head 14 on the inner wall of the bottom of the drying box 1 to prepare fine powder;
then, as shown in fig. 1 and fig. 5, air and powder are blown into the discharge pipe 15 and enter the cloth bag separation cylinder 20 through the installation pipe 16, the second motor 17 is started, the second motor 17 drives the installation pipe 16 to rotate through the movable gear 18 and the gear sleeve 19, and further the installation pipe 16 drives the cloth bag separation cylinder 20 to revolve, and simultaneously the bevel gear 21 on the cloth bag separation cylinder 20 and the bevel gear 21 on the guide frame 23 rotate, so that the cloth bag separation cylinder 20 synchronously rotates during revolution, the upper end and the middle part of the cloth bag separation cylinder 20 are in a cloth bag filtering structure, the revolution and the rotation of the cloth bag separation cylinder 20 perform centrifugal separation on the air and the powder, and the powder is centrifuged to the bottom plastic bag part through the inclined cloth bag separation cylinder 20 to be collected, and simultaneously the cloth bag separation cylinder 20 rotates and is matched with the guide frame 23 of the concave structure to guide the cloth bag separation cylinder 20 to shake and vibrate, the blockage in the cloth bag separating cylinder 20 can be avoided, and the powder accumulated at the bottom of the cloth bag separating cylinder 20 can be collected by opening the sealing cover.
Those not described in detail in this specification are prior art well known to those skilled in the art, and in the description of the present invention, "plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (10)
1. A preparation process of acrylic emulsion is characterized by comprising the following steps: the preparation process of the acrylic emulsion comprises the following steps:
s1: preparing ethyl acrylate and ethyl methacrylate as monomer raw materials, and adding an emulsifier, an olefine acid aqueous solution, an initiator and deionized water;
s2: adding ethyl acrylate and ethyl methacrylate into a reaction kettle, and adding an olefine acid aqueous solution for mixing reaction to dissolve the ethyl acrylate and the ethyl methacrylate into the olefine acid aqueous solution;
s3: after the reaction in the step S2 is finished, adding deionized water and an emulsifier into the reaction kettle continuously for an emulsification reaction, keeping the temperature at 70-90 ℃ for 1h, and then adding an initiator, keeping the temperature at 80-100 ℃ for 0.8 h;
s4: the prepared emulsion is introduced into a drying device for drying treatment to prepare acrylic acid particles which are convenient for subsequent storage and use;
the drying device in the step S4 comprises a drying box (1), wherein the bottom of the drying box (1) is connected with a liquid inlet pipe (2), one end of the liquid inlet pipe (2) is provided with an atomizing nozzle (3), the atomizing nozzle (3) is oppositely and obliquely arranged inside the drying box (1), the top of the drying box (1) is fixed with a partition plate (4), and the bottom of the partition plate (4) is provided with a temperature sensor (5);
further comprising:
the first motor (6) is installed at the outer side of the middle part of the drying box (1) in an embedded mode, the output end of the first motor (6) is connected with a guide gear (7), and one side of the guide gear (7) is provided with a drying cylinder (8), the outer side of the top of the drying cylinder (8) is meshed and contacted with the guide gear (7) through a rack-shaped structure arranged at an equal angle, and the drying cylinder (8) is embedded and movably arranged on the inner wall of the middle part of the drying box (1), and the inner wall of the drying cylinder (8) is provided with an air guide hole (9), the outer side of the drying box (1) is respectively provided with a first hot air pipe (10), a second hot air pipe (11) and a cold air pipe (12) in a penetrating way from bottom to top, a grinding body (13) is movably arranged at the opening at the bottom of the drying box (1) in an embedded manner, a grinding head (14) is fixed on the outer side of the grinding body (13) and the inner wall of the opening at the bottom of the drying box (1);
the discharging pipe (15) is connected to the edge of the top of the drying box (1) in a penetrating mode, the bottom of the discharging pipe (15) is movably sleeved with a mounting pipe (16) in a penetrating mode, a second motor (17) is fixed to the inner side of the outer portion of the discharging pipe (15), the output end of the second motor (17) is connected with a movable gear (18), a gear sleeve (19) is meshed to one side of the movable gear (18), the gear sleeve (19) is sleeved on the top of the mounting pipe (16), a cloth bag separating barrel (20) is movably mounted at the bottom of the mounting pipe (16) in a penetrating mode, a guide frame (23) is arranged below the cloth bag separating barrel (20), the bottom of the guide frame (23) is fixedly connected to the outer side of the bottom of the drying box (1) through a mounting rod (22), and bevel gears (21) are mounted on the top of the guide frame (23) and the top of the cloth bag separating barrel (20), and the bevel gear (21) on the guide frame (23) is meshed with the bevel gear (21) on the cloth bag separating cylinder (20).
2. The process for preparing an acrylic emulsion according to claim 1, wherein: the weight parts of the ethyl acrylate, the ethyl methacrylate, the emulsifier, the olefine acid aqueous solution, the initiator and the deionized water are respectively 10-25 parts, 20-30 parts, 10-15 parts, 5-10 parts and 20-25 parts.
3. The process for preparing an acrylic emulsion according to claim 1, wherein: drying cylinder (8) is embedded type laminating rotation installation in drying cabinet (1), and the bottom of drying cylinder (8) is fixed with ring gear (81) to the inboard meshing of ring gear (81) has fluted roller (82), and fluted roller (82) and equal embedded movable mounting of ring gear (81) are in drying cabinet (1), are connected with belt (83) between the bottom of fluted roller (82) and rinding body (13) simultaneously.
4. The process for preparing an acrylic emulsion according to claim 1, wherein: the inner wall of drying cylinder (8) is convex heliciform mechanism design, and wind-guiding hole (9) of drying cylinder (8) inner wall heliciform structure department are the angular distribution such as, and wind-guiding hole (9) are the slope structural design, and the middle part outside and the inside of drying cylinder (8) all are provided with wind-guiding channel moreover.
5. The process for preparing an acrylic emulsion according to claim 1, wherein: an air exchange pipe (121) is vertically arranged between the cold air pipe (12) and the second hot air pipe (11) in a penetrating mode, and control valves (122) are arranged on the air exchange pipe (121) and the second hot air pipe (11).
6. The process for preparing an acrylic emulsion according to claim 1, wherein: the top of the grinding body (13) is designed into a round table type structure, and the side of the grinding body (13) is parallel to the opening at the bottom of the drying box (1).
7. The process for preparing an acrylic emulsion according to claim 1, wherein: the grinding heads (14) are circumferentially distributed on the outer side of the grinding body (13) and the inner wall of the bottom of the drying box (1) at equal intervals, and the inner wall of the bottom of the drying box (1) and the grinding heads (14) on the outer side of the grinding body (13) are distributed in a staggered mode.
8. The process for preparing an acrylic emulsion according to claim 1, wherein: the cloth bag separating cylinder (20) is in an inclined structure and is distributed at the bottom of the mounting pipe (16) at equal angles, the bottom of the cloth bag separating cylinder (20) is in a closed plastic bag structure, and a sealing cover structure is arranged at the bottom of the cloth bag separating cylinder (20).
9. The process for preparing an acrylic emulsion according to claim 1, wherein: the two guide frames (23) are arranged up and down along the length direction of the cloth bag separating cylinder (20), and the sides of the guide frames (23) are designed to be of an inwards concave annular structure.
10. The acrylic emulsion according to claim 1, wherein: the acrylic emulsion is prepared by the acrylic emulsion preparation process of any one of claims 1 to 9, and the components and the parts by weight of the acrylic emulsion comprise 10 to 25 parts by weight of ethyl acrylate, 20 to 30 parts by weight of ethyl methacrylate, 10 to 15 parts by weight of emulsifier, 10 to 15 parts by weight of olefine acid aqueous solution, 5 to 10 parts by weight of initiator and 20 to 25 parts by weight of deionized water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111631934.1A CN114249856A (en) | 2021-12-29 | 2021-12-29 | Preparation process of acrylic emulsion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111631934.1A CN114249856A (en) | 2021-12-29 | 2021-12-29 | Preparation process of acrylic emulsion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114249856A true CN114249856A (en) | 2022-03-29 |
Family
ID=80798608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111631934.1A Pending CN114249856A (en) | 2021-12-29 | 2021-12-29 | Preparation process of acrylic emulsion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114249856A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116139769A (en) * | 2022-11-03 | 2023-05-23 | 郑州嵩山硼业科技有限公司 | Special granulating method for pressureless sintering ceramic |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101696277A (en) * | 2009-10-27 | 2010-04-21 | 华南理工大学 | Redispersable acrylic ester polymer emulsion powder and preparation method thereof |
| CN102847329A (en) * | 2012-04-17 | 2013-01-02 | 常州市宇通干燥设备有限公司 | Centrifugal spray drying tower of spray granulation fluidized drying unit |
| CN112316456A (en) * | 2020-11-16 | 2021-02-05 | 景德镇欧神诺陶瓷有限公司 | Constant temperature spray drying system |
| CN112403000A (en) * | 2020-11-25 | 2021-02-26 | 方梅珍 | Preparation method of concrete modified additive |
| CN213667952U (en) * | 2020-07-31 | 2021-07-13 | 烟台海润嘉生物科技有限公司 | Food spray dryer |
| CN214861232U (en) * | 2021-06-03 | 2021-11-26 | 常州一步干燥设备有限公司 | Upper air inlet and upper air outlet pressure spray dryer |
-
2021
- 2021-12-29 CN CN202111631934.1A patent/CN114249856A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101696277A (en) * | 2009-10-27 | 2010-04-21 | 华南理工大学 | Redispersable acrylic ester polymer emulsion powder and preparation method thereof |
| CN102847329A (en) * | 2012-04-17 | 2013-01-02 | 常州市宇通干燥设备有限公司 | Centrifugal spray drying tower of spray granulation fluidized drying unit |
| CN213667952U (en) * | 2020-07-31 | 2021-07-13 | 烟台海润嘉生物科技有限公司 | Food spray dryer |
| CN112316456A (en) * | 2020-11-16 | 2021-02-05 | 景德镇欧神诺陶瓷有限公司 | Constant temperature spray drying system |
| CN112403000A (en) * | 2020-11-25 | 2021-02-26 | 方梅珍 | Preparation method of concrete modified additive |
| CN214861232U (en) * | 2021-06-03 | 2021-11-26 | 常州一步干燥设备有限公司 | Upper air inlet and upper air outlet pressure spray dryer |
Non-Patent Citations (1)
| Title |
|---|
| 陈英南: "《常用化工单元设备的设计 第2版》", 华东理工大学出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116139769A (en) * | 2022-11-03 | 2023-05-23 | 郑州嵩山硼业科技有限公司 | Special granulating method for pressureless sintering ceramic |
| CN116139769B (en) * | 2022-11-03 | 2023-12-19 | 郑州嵩山硼业科技有限公司 | Special granulating method for pressureless sintering ceramic |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114249856A (en) | Preparation process of acrylic emulsion | |
| CN209828295U (en) | All-round centrifugal spray drier | |
| CN201551860U (en) | Centrifugal spray dryer unit | |
| CN211058850U (en) | Cyclone filtering wet dust removal fan | |
| CN216073091U (en) | Cylinder drying device is used in poly aluminium chloride production | |
| CN210751908U (en) | Special dust pelletizing system of application equipment | |
| CN209669273U (en) | A kind of Ou Yelu furnace roof spray nozzle device | |
| CN106363186B (en) | A kind of lead powder production system | |
| CN117224986A (en) | Anti-sticking wall spray drying tower for particle production | |
| CN209076931U (en) | A kind of thermosetting powder coating micro mist disintegrating apparatus cyclone separator | |
| CN215468100U (en) | Nitrogen gas atomizing equipment is used in aluminite powder production | |
| CN116421831A (en) | Clinical atomizing medicine spraying device | |
| CN211246989U (en) | Cyclone dust removal and cooling device | |
| CN211329792U (en) | Spray dryer for ceramic tile production | |
| CN115337741A (en) | Circulating air filtering device of crystallization drying tower | |
| CN204275522U (en) | A kind of solid catalyst atomization drying system being convenient to clean | |
| CN211800649U (en) | Medicinal boiling pelletization device | |
| CN210473081U (en) | Centrifugal spray drier | |
| CN208475917U (en) | Rice protein drying device | |
| CN208626903U (en) | Wet scrubber | |
| CN211754723U (en) | Forced air supply cooling spray-drop granulation equipment | |
| CN216571560U (en) | High-speed centrifugal spray drier | |
| CN214486275U (en) | Dust recovery device for urea production | |
| CN210118905U (en) | Air purification device and air conditioner indoor unit with same | |
| CN211353754U (en) | Centrifugal spray dryer special for formula milk powder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |