Specification
Title of invention: Super absorbent polymer drying device
technical field
[One]
Cross-Citation with Related Applications
[2]
This application claims the benefit of priority based on Korean Patent Application No. 10-2020-0138510 dated October 23, 2020, and all contents disclosed in the literature of the Korean patent application are incorporated as a part of this specification.
[3]
[4]
The present invention relates to a superabsorbent polymer drying apparatus in which drying efficiency of the superabsorbent polymer is improved.
[5]
background
[6]
In general, super absorbent polymer (SAP) is a polymer material in the form of a white powder produced by reacting acrylic acid with caustic soda, and can absorb water 500 to 1,000 times its own weight.
[7]
Super absorbent polymers are synthetic polymers that transform into jelly-like shapes when they absorb water, and have the ability to store water without draining it even when a certain amount of pressure is applied from the outside.
[8]
Superabsorbent polymer molecules have a network-like structure, and can absorb water well due to the many pores in between, and water due to the difference in ion concentration between the inner and outer solutions (water) of the superabsorbent polymer. It moves into the superabsorbent polymer (osmotic pressure phenomenon). When water molecules flow into the superabsorbent polymer, the anions fixed therein try to occupy a certain space by the repulsive force, and the space of the polymer chain expands, allowing more water to be absorbed (electrostatic repulsion).
[9]
These superabsorbent polymers started to be put to practical use as sanitary products, and now, in addition to hygiene products such as children's paper diapers, soil repair agents for gardening, water retention materials for civil engineering and construction, seedling sheets, freshness maintenance agents in the food distribution field, and poultices It is widely used as a material such as
[10]
As a method for producing the superabsorbent polymer, a method by reverse-phase suspension polymerization, a method by aqueous solution polymerization, and the like are known.
[11]
Among these, aqueous polymerization methods include a thermal polymerization method in which the polymerization gel is broken and cooled in a kneader equipped with a shaft, and a photopolymerization method in which a high-concentration aqueous solution is irradiated with ultraviolet rays or the like on a belt to perform polymerization and drying at the same time. .
[12]
As a known method, there is a method for producing a water-absorbing resin in which a water-soluble ethylenically unsaturated monomer having a crosslinking agent is irradiated with ultraviolet rays in the presence of a radical-based photopolymerization initiator having a benzoyl group and a peroxide, and the like. is manufactured into a powdery water-absorbing resin through cutting, drying, pulverization, and surface treatment processes.
[13]
Among them, in the drying process, the absorbent resin is transferred to the dryer through a conveyor belt, and the absorbent resin is laminated to a thickness of about 100 mm on the conveyor belt and dried into a sheet-shaped resin mass.
[14]
In the drying process, the particles of the superabsorbent polymer before drying do not have high bonding strength between the superabsorbent polymers, and the particles are easily separated.
[15]
On the other hand, in the conventional conveyor belt, the drying operation of the superabsorbent polymer is performed in a state in which it is installed in a flat state.
[16]
DETAILED DESCRIPTION OF THE INVENTION
technical challenge
[17]
An embodiment of the present invention is to provide a superabsorbent polymer drying apparatus capable of increasing the contact area of ​​hot air, increasing the drying amount and improving drying efficiency by installing the conveyor inclined.
[18]
means of solving the problem
[19]
An embodiment of the present invention is a drying apparatus provided with a conveyor for drying the superabsorbent polymer, and may include a conveyor for transporting the superabsorbent polymer and a hot air supply unit for supplying dry hot air to the conveyor.
[20]
The conveyor may include a plurality of conveyor beds connected to each other in a bent state, a link connection unit connecting the plurality of conveyor beds to each other, and a driving unit for driving the conveyor beds.
[21]
The conveyor bed may include a plurality of bed bodies in which the superabsorbent polymer is seated on the surface to be transported, and a connection groove formed on a side surface of the bed body to which the link connection part is connected.
[22]
The link connection part may include a link protrusion that protrudes from one side of the bed body and is inserted into the connection groove of the adjacent bed body.
[23]
The plurality of bed bodies may be inclinedly connected to each other at an angle range of 90 degrees to 170 degrees.
[24]
The driving unit includes a rack gear installed along the edge of the bed body. It may include a pinion gear meshed with the rack gear to provide a moving driving force to the bed body.
[25]
The rack gear includes: a first rack gear installed along an edge of an upper surface of the bed body; It may include a second rack gear installed along the edge of the lower surface of the bed body.
[26]
The pinion gear may include a first pinion gear that transmits a rotational driving force to the first rack gear from an upper side of the bed body, and a second pinion gear that transmits a rotational driving force to the second rack gear from a lower side of the bed body.
[27]
The first pinion gear may be meshed with the first rack gear at an upper side of a position where the plurality of bed bodies are inclinedly connected to each other.
[28]
The second pinion gear may be meshed with the second rack gear at a lower side of a position where the plurality of bed bodies are inclinedly connected to each other.
[29]
Effects of the Invention
[30]
According to an embodiment of the present invention, a plurality of bed bodies constituting the conveyor are connected to each other obliquely and are operated by the driving force of the driving unit, so that the contact area of ​​the hot air supplied to the conveyor is increased and the thickness of the crumb bed is reduced It is possible to improve the drying efficiency of the super absorbent polymer.
[31]
Brief description of the drawing
[32]
1 is a schematic view of a main part of a drying apparatus for a super absorbent polymer according to an embodiment of the present invention.
[33]
2 is a plan view schematically illustrating a state in which a plurality of bed bodies of the conveyor bed of FIG. 1 are connected.
[34]
3 is a plan view schematically illustrating a state in which a part of the bed body of FIG. 2 is separated.
[35]
FIG. 4 is a cross-sectional view schematically illustrating the bed body viewed along the line A-A of FIG. 3 .
[36]
[37]

[38]
11...Dryer body
[39]
12...Super absorbent resin
[40]
13...Input
[41]
100..Conveyor
[42]
110..Conveyor bed
[43]
111..bed body
[44]
113..connection groove
[45]
115..Link connection part, link protrusion
[46]
120..Link connection
[47]
121..Rack Gear
[48]
121a.. 1st rack gear
[49]
121b..Second rack gear
[50]
123..Pinion Gear
[51]
123a.. 1st pinion gear
[52]
123b..2nd pinion gear
[53]
200..Hot air supply
[54]
Modes for carrying out the invention
[55]
Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those of ordinary skill in the art can easily carry out the present invention. However, the present invention may be embodied in several different forms and is not limited to the embodiments described herein. In order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and the same reference numerals are assigned to the same or similar components throughout the specification.
[56]
[57]
1 is a schematic view of a main part of a superabsorbent polymer drying apparatus according to an embodiment of the present invention, and FIG. 2 is a main part plan view schematically showing a state in which a plurality of bed bodies of the conveyor bed of FIG. 1 are connected, 3 is a plan view schematically illustrating a state in which a part of the bed body of FIG. 2 is separated, and FIG. 4 is a cross-sectional view schematically illustrating the bed body taken along the line A-A of FIG. 3 .
[58]
1 to 4 , the superabsorbent polymer drying device 300 according to an embodiment of the present invention is a drying device in which a conveyor for drying the superabsorbent polymer is installed, and the superabsorbent polymer 12 is dried. It may include a conveyor 100 for transferring and a hot air supply unit 200 for supplying dry hot air to the conveyor 100 .
[59]
The conveyor 100 may be installed to receive the superabsorbent polymer 12 and transport the superabsorbent polymer 12 inside the dryer body 11 .
[60]
An input unit 13 for supplying the superabsorbent polymer 12 to the conveyor 100 may be installed on the side of the dryer body 11 .
[61]
The input unit 13 is installed to properly input the superabsorbent polymer 12 to be dried in the direction of the conveyor 100 from the side of the dryer body 11 . The superabsorbent polymer 12 may be installed so that the superabsorbent polymer 12 is dropped by its own weight on the conveyor 100 installed inside the dryer body 11 .
[62]
The conveyor 100 is installed to be movable in one direction or the reverse direction by the driving operation of the driving unit 120 inside the dryer body 11, and the super absorbent polymer 12 by the hot air supplied through the hot air supply unit 200. It may be installed so that the drying operation of the
[63]
A plurality of hot air supply units 200 may be installed under the conveyor 100 to supply dry hot air for drying to the conveyor 100 .
[64]
More specifically, the conveyor 100 includes a plurality of conveyor beds 110 connected to each other in a bent state, a link connection part 115 connecting between the plurality of conveyor beds 110 , and the conveyor bed. It may include a driving unit 120 for driving the 110 .
[65]
A plurality of conveyor beds 110 may be installed in a state adjacent to each other and connected to each other. The conveyor bed 110 may be installed movably by the driving force of the driving unit 120 inside the dryer body 11 in a state in which they are inclinedly connected to each other.
[66]
The conveyor bed 110 includes a plurality of bed bodies 111 in which the superabsorbent polymer 12 is seated on the surface and transported, and a connection groove formed on the side of the bed body 111 to connect the link connection part 115 to it. (113) may be included.
[67]
The bed body 111 has a rectangular planar shape, and a plurality of links are adjacent to each other.It may be connected by a connection part 115 .
[68]
The bed body 111 may have a connection groove 113 to which the link connection part 115 is connected so that a plurality of them are connected to each other in a state adjacent to each other.
[69]
A plurality of connection grooves 113 are formed on one side of the bed body 111 so that the link connection portions 115 formed on the side surfaces of any one adjacent bed body 111 among the plurality of bed bodies 111 are connected to each other. can be
[70]
These connection grooves 113 are formed in two pieces spaced apart from each other on one side of the bed body 111, and may be connected in a state in which the link connection part 115 is inserted therein.
[71]
The link connection part 115 is formed to protrude from the side opposite to the side on which the connection groove 113 is formed in the bed body 111 , and in this embodiment, a link stone connected in a state inserted into the connection groove 113 . can be applied as a part. Hereinafter, the same reference numerals are used for the link connection part and the link protrusion part.
[72]
The link protrusions 115 are two protruding from the side of the bed body 111 spaced apart from each other. It may be inserted and fixed in the connection groove 113 .
[73]
Here, the plurality of bed bodies 111 may be inclinedly connected to each other at an angle range A of 90 degrees to 170 degrees.
[74]
The plurality of bed bodies 111 may be installed to be inclined at an angle range B of 5 degrees to 45 degrees upward in the dryer body 11 . Also, the plurality of bed bodies 111 may be inclinedly connected to each other at an angle range of 90 degrees to 170 degrees.
[75]
The plurality of bed bodies 111 may be connected to each other in a zigzag shape in the upper and lower directions when the state connected to each other is viewed from the side.
[76]
As such, in the conveyor 100 of this embodiment, a plurality of bed bodies 111 are connected to each other obliquely, and in the interior space of the dryer body 11 , the surface area on which the superabsorbent polymer is seated compared to a conventional flat conveyor is An increase of more than 12% is possible.
[77]
That is, when the plurality of bed bodies 111 of this embodiment are inclined at an angle range of 90 degrees to 170 degrees to each other in comparison with a conventional 1m flat conveyor, the length of the connected length can be extended to 1.12m. Therefore, the thickness of the crumb bed installed on the upper surface of the bed body 111 can be reduced by 12%. Since the area to which the hot air is in contact can be increased by 12%, it is possible to improve the drying efficiency of the super absorbent polymer.
[78]
Meanwhile, the driving unit 120 may be movably installed inside the dryer body 11 in a state in which the plurality of bed bodies 111 are connected to each other by the link protrusions 115 .
[79]
More specifically, the driving unit 120 includes a rack gear 121 installed along the edge of the bed body 111 , and a pinion meshed with the rack gear 121 to provide a moving driving force to the bed body 111 . It may include a gear 123 .
[80]
The rack gear 121 includes the first rack gear 121a installed along the edge of the upper surface of the bed body 111 . A second rack gear 121b installed along the edge of the lower surface of the bed body 111 may be included.
[81]
The first rack gear 121a may be installed at opposing edge positions of the upper surfaces of the plurality of bed bodies 111 .
[82]
The second rack gear 121b may be installed at opposing edge positions on the lower surfaces of the plurality of bed bodies 111 .
[83]
The pinion gear 123 may be meshed with the first rack gear 121a and the second rack gear 121b.
[84]
The pinion gear 123 includes a first pinion gear 123a that transmits a rotational driving force to the first rack gear 121a from an upper side of the bed body 111 and a second rack gear ( It may include a second pinion gear (123b) for transmitting the rotational driving force to 121b).
[85]
The first pinion gear 123a may be installed such that the plurality of bed bodies 111 are meshed with the first rack gear 121a from the upper side connected to each other.
[86]
The first pinion gear 123a may be installed in a state in which the plurality of bed bodies 111 are meshed with the first rack gear 121a at positions connected to each other. Accordingly, the first pinion gear 123a may transmit a driving force to the conveyor 100 while supporting the upper side of the plurality of bed bodies 111 connected to each other.
[87]
A plurality of first pinion gears 123a are installed to support an upper position in which a plurality of bed bodies 111 are connected to each other, and may be installed to support an upper position in which a plurality of bed bodies 111 are inclinedly connected.
[88]
The second pinion gear 123b may be installed to mesh with the second rack gear 121b from a lower side in which the plurality of bed bodies 111 are connected to each other.
[89]
The second pinion gear 123b may be installed in a state where the plurality of bed bodies 111 are meshed with the second rack gear 121b at positions connected to each other. Accordingly, the second pinion gear 123b may transmit a driving force to the conveyor 100 while supporting the lower side of the plurality of bed bodies 111 connected to each other.
[90]
A plurality of second pinion gears 123b are installed to support a lower position in which a plurality of bed bodies 111 are connected to each other, and may be installed to support a lower position in which a plurality of bed bodies 111 are inclinedly connected.
[91]
The first pinion gear 123a and the second pinion gear 123b described above are respectively installed at alternating positions with each other so as to support the upper and lower sides of the bed body 111 at the position where the plurality of bed bodies 111 are connected. can be
[92]
In this way, the first pinion gear 123a and the second pinion gear 123b may be installed to appropriately transmit the driving force to the conveyor 100 while stably supporting the state in which the plurality of bed bodies 111 are inclinedly connected. have.
[93]
As described above, in the superabsorbent polymer drying apparatus 300 of this embodiment, the plurality of bed bodies 111 constituting the conveyor 100 are connected to each other obliquely and are operated by the driving force of the driving unit 120 . , the contact area of ​​the hot air supplied to the conveyor 100 is increased and the thickness of the crumb bed can be reduced, so that the drying efficiency of the superabsorbent polymer can be improved.
[94]
[95]
The superabsorbent polymer referred to in the present invention may be prepared by a conventional method and is not particularly limited. For example, the superabsorbent polymer may be polymerized by thermal polymerization or photopolymerization with respect to a monomer composition solution including a raw material of the superabsorbent polymer.
[96]
The raw material of the superabsorbent polymer may include a monomer, a basic compound for neutralizing the monomer, a polymerization initiator, a crosslinking agent, and various additives.
[97]
The monomer may be used without limitation in its composition as long as it is a monomer commonly used in the preparation of the superabsorbent polymer. Here, any one or more selected from the group consisting of anionic monomers and salts thereof, nonionic hydrophilic-containing monomers, amino group-containing unsaturated monomers, and quaternaries thereof may be used.

Claims
[Claim 1]
A drying device provided with a conveyor for drying the superabsorbent polymer, comprising: a conveyor for transporting the superabsorbent polymer; and a hot air supply unit for supplying dry hot air to the conveyor. Including, wherein the conveyor comprises: a plurality of conveyor beds connected to each other in a bent state; a link connecting portion connecting the plurality of conveyor beds; and a driving unit for driving the conveyor beds. A superabsorbent polymer drying device comprising a.
[Claim 2]
The apparatus of claim 1 , wherein the conveyor bed comprises: a plurality of bed bodies to which the superabsorbent polymer is seated and transported; and a connection groove formed on a side surface of the bed body to which the link connection part is connected. A superabsorbent polymer drying device comprising a.
[Claim 3]
The superabsorbent polymer drying apparatus according to claim 2, wherein the link connection part includes a link protrusion that protrudes from one side of the bed body and is inserted into the connection groove of the adjacent bed body.
[Claim 4]
The superabsorbent polymer drying apparatus according to claim 3, wherein the plurality of bed bodies are inclinedly connected to each other at an angle ranging from 90 degrees to 170 degrees.
[Claim 5]
According to claim 4, wherein the drive unit, Rack gear installed along the edge of the bed body; and a pinion gear meshed with the rack gear to provide a moving driving force to the bed body. A superabsorbent polymer drying device comprising a.
[Claim 6]
According to claim 5, wherein the rack gear, A first rack gear installed along the edge of the upper surface of the bed body; and a second rack gear installed along an edge of a lower surface of the bed body. A superabsorbent polymer drying device comprising a.
[Claim 7]
According to claim 6, wherein the pinion gear, A first pinion gear for transmitting a rotational driving force to the first rack gear from an upper side of the bed body; and a second pinion gear that transmits a rotational driving force to the second rack gear from a lower side of the bed body. A superabsorbent polymer drying device comprising a.
[Claim 8]
The superabsorbent polymer drying apparatus according to claim 7, wherein the first pinion gear is meshed with the first rack gear above a position where the plurality of bed bodies are inclinedly connected to each other.
[Claim 9]
The superabsorbent polymer drying apparatus according to claim 8, wherein the second pinion gear is meshed with the second rack gear below a position where the plurality of bed bodies are inclinedly connected to each other.