CN212246848U - Precipitation forming device - Google Patents
Precipitation forming device Download PDFInfo
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- CN212246848U CN212246848U CN202021156524.7U CN202021156524U CN212246848U CN 212246848 U CN212246848 U CN 212246848U CN 202021156524 U CN202021156524 U CN 202021156524U CN 212246848 U CN212246848 U CN 212246848U
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- 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
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- 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
- Y02W30/62—Plastics recycling; Rubber recycling
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Abstract
The embodiment of the utility model provides a precipitation forming device, which creatively adopts a structure that an extrusion plate is connected with a honeycomb cavity, and a first hollow pipe and a second hollow pipe which are sleeved are respectively arranged at the outlets of the extrusion plate and the honeycomb cavity; based on this, when high-pressure pure water and high-pressure PVDF raw materials meet at the exit, can directly separate out strip PVDF, and directly get into the basin of collection system, so can keep strip unchangeable, solved the inconvenient technical problem who collects after PVDF separates out with the colloid.
Description
Technical Field
The utility model relates to an industrial chemicals retrieves the field, especially relates to a precipitation forming device.
Background
The fluorocarbon resin has a strong C-F bond as a skeleton, and has better heat resistance, chemical resistance, cold resistance, low-temperature flexibility, weather resistance, electrical property and the like compared with other resins, and has non-adhesiveness and non-wettability due to good crystallinity. The paint is widely applied to the high-grade coil coating of industrial machines such as kitchens and cooking appliances, molding dies, mechanical sliding parts, food, textile, paper making and the like, and the coating and lining of various tanks, conveying pipelines, pumps, reaction kettles, heat exchangers, precision instruments and the like. Fluorine element in the fluorocarbon resin has large electronegativity, strong fluorocarbon bond energy, strong toughness, low friction coefficient, strong flame retardance and corrosion resistance, good aging resistance, weather resistance, moisture resistance, acid and alkali resistance, good irradiation resistance and the like, and is widely applied in the industrial field. Among the most used in the coating or binder field is polyvinylidene fluoride (PVDF). PVDF is primarily vinylidene fluoride homopolymers or copolymers of vinylidene fluoride with other minor amounts of fluorine-containing vinyl monomers. PVDF is soluble in only a few solvents, including Nitrogen Methyl Pyrrolidone (NMP), dimethylacetamide (DMAc), Dimethylformamide (DMF), and Dimethylsulfoxide (DMSO). PVDF is used as a raw material of high molecular products such as coating, adhesive and the like, and generates some waste materials mixed with other substances in the production and application processes. These wastes are difficult to degrade in the soil after being buried as solid wastes and are also a waste. Therefore, the present method for recovering such PVDF can adopt the above-mentioned organic solvent to dissolve and obtain a polymer solution of PVDF by filtration. Since PVDF precipitates after adding water to an organic solvent solution of PVDF, PVDF is recovered by precipitating PVDF by adding water to a polymer solution of PVDF when PVDF is separated and recovered.
In this method, there arises a problem that when water is added to a polymer solution of PVDF, PVDF precipitates in a colloidal form and then gradually forms a colloidal deposit. This presents difficulties for subsequent filtration, washing and collection of the PVDF.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problem, an embodiment of the utility model provides a precipitate forming device, the macromolecular solution that realizes PVDF forms strip precipitate when meeting water and appearing, has made things convenient for follow-up PVDF's washing and collection.
In order to achieve the above object, an embodiment of the present invention provides a precipitation forming device, including:
the device comprises a feeding system, an extrusion forming system, a water inlet system and a collecting system;
the feeding system comprises a first pressure unit and a second pressure unit, wherein the first pressure unit is used for conveying PVDF raw materials to the extrusion forming system;
the extrusion forming system comprises a cylinder body, an extrusion plate and a honeycomb cavity; the input end of the cylinder is connected with the output end of the feeding system; the output end of the cylinder body is connected with the input end of the extrusion plate; the output end of the extrusion plate is connected with the input end of the honeycomb cavity; the output end of the honeycomb cavity is connected with the collecting system; the input end of the honeycomb cavity is connected with the output end of the water inlet system;
the collection system is used to collect the shaped PVDF.
Alternatively to this, the first and second parts may,
the water inlet system comprises a water container and a second pressure unit;
the second pressure unit is connected with the input end of the honeycomb-shaped cavity and used for conveying the ultrapure water in the water container to the honeycomb-shaped cavity.
Alternatively to this, the first and second parts may,
a plurality of extrusion holes are distributed on the extrusion plate, and the outlet of each extrusion hole is connected with a hole diameter d1A first hollow tube;
forming holes which correspond to the extrusion plates one by one are formed in the honeycomb-shaped cavity;
the output end of each forming hole is connected with a hole diameter d2A second hollow tube; wherein d is2＞d1；
The first hollow pipe penetrates through the forming hole and extends into the second hollow pipe; the first hollow tube is not long enough to extend out of the second hollow tube.
Alternatively to this, the first and second parts may,
the cylinder body is connected with the extrusion plate through a first flange;
the extrusion plate is connected with the honeycomb cavity through a second flange;
the second flange is provided with a water inlet for connection with a second pressure unit of the water inlet system.
Alternatively to this, the first and second parts may,
there is water in the collection system, and the surface of water is higher than the output of honeycomb cavity.
Alternatively to this, the first and second parts may,
the first pressure unit is a high-pressure pump or a screw extrusion device;
the high-pressure pump or the screw extrusion device is connected with a raw material tank, and the raw material tank is used for containing the PVDF raw material.
Alternatively to this, the first and second parts may,
the second pressure unit is a high-pressure pump;
the high-pressure pump is connected with the water tank, and the water tank is used for containing the ultrapure water.
The technical scheme has the following beneficial effects:
the utility model creatively adopts the structure that the extrusion plate is connected with the honeycomb-shaped cavity, and the outlet of the extrusion plate and the outlet of the honeycomb-shaped cavity are respectively provided with a first hollow pipe and a second hollow pipe which are sleeved; based on this, when high-pressure pure water and high-pressure PVDF raw materials meet at the exit, can directly separate out strip PVDF, and because it is in the basin of collection system that directly gets into, be in the state of floating, so can keep strip unchangeable, solved PVDF with the technical problem that the gelatineous inconvenient collection that separates out after.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a block diagram of the precipitation molding apparatus of the present invention;
fig. 2 is a block diagram showing a precipitation molding apparatus according to another embodiment of the present invention;
fig. 3 is a schematic cross-sectional view of the cylindrical chamber a.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
When water is added to a polymeric solution of PVDF, PVDF precipitates in a colloidal form and a colloidal deposit gradually forms. This presents difficulties for subsequent filtration, washing and collection of the PVDF. Based on the problem, the device and the method provided by the application can realize that the PVDF polymer solution forms strip precipitates when separated out in water, and facilitate the subsequent washing and collection of the PVDF.
The invention is illustrated below by means of specific examples:
as shown in fig. 1, an embodiment of the present invention provides a structural block diagram of a precipitation molding apparatus, including:
raw material groove, high-pressure pump 1, the barrel that is connected with charge-in system, water tank, high-pressure pump 2, collecting vat, flange water inlet dish, tube-shape cavity A. The raw material tank is used for containing PVDF slurry (namely, PVDF high molecular solution) to be treated, and the feeding pump is used for pumping the PVDF slurry to a cylinder connected with a feeding system; the slurry in the cylinder connected with the feeding system is extruded to the cylindrical cavity A; the water tank is used for receiving ultrapure water required by PVDF forming; the high-pressure pump 2 pumps the ultrapure water to the water inlet of the flange water inlet disc. The hollow pipe 1 in the structure of the cylindrical cavity A is used for discharging PVDF slurry, and the hollow pipe 2 is used for discharging water. The collecting tank is used for collecting the formed PVDF and the mixed solvent of water and the organic solvent.
A feeding system 101, an extrusion forming system 102, a water inlet system 103 and a collecting system 104;
the feeding system comprises a first pressure unit 1011 for conveying PVDF feedstock to the extrusion forming system 102;
the extrusion system 102 comprises a barrel 1021, an extrusion plate 1022, and a honeycomb cavity 1023; the input end of the barrel 1021 is connected with the output end of the feeding system 101; the output end of the cylinder 1021 is connected with the input end of the extrusion plate 1022; the output end of the extrusion plate 1022 is connected with the input end of the honeycomb cavity 1023; the output end of the honeycomb cavity 1023 is connected to the collection system 104; wherein, the input end of the honeycomb cavity 1023 is connected with the output end of the water inlet system 103;
the collection system 104 is used to collect the formed PVDF.
The utility model discloses in, designed an extrusion system 102, carried the extrusion system when the high pressure PVDF raw materials in feed system 101, the high-pressure pure water in the water intake system 103 also carries the extrusion system simultaneously, and the banding PVDF can directly be appeared through the extrusion system to high pressure PVDF solution and high-pressure pure water, and not the colloidal washing and the collection of having made things convenient for follow-up PVDF.
The extrusion forming system 102 comprises an extrusion plate and a honeycomb cavity, and a first hollow pipe and a second hollow pipe which are sleeved are respectively arranged at the outlets of the extrusion plate and the honeycomb cavity; the high-pressure PVDF raw material coming out of the first hollow pipe meets the high-pressure pure water coming out of the second hollow pipe, and strip-shaped PVDF can be directly separated out.
Alternatively to this, the first and second parts may,
the water inlet system 103 comprises a water container and a second pressure unit;
the second pressure unit is connected with the input end of the honeycomb-shaped cavity and used for conveying the ultrapure water in the water container to the honeycomb-shaped cavity.
The water in the water container needs to be delivered to the extrusion system by a pressure unit, for example: and the ultrapure water in the water container is pressurized by the high-pressure pump, so that the ultrapure water can be conveyed into the extrusion molding system to meet the high-pressure PVDF solution.
Alternatively to this, the first and second parts may,
a plurality of extrusion holes are distributed on the extrusion plate, and the outlet of each extrusion hole is connected with a hole diameter d1A first hollow tube;
forming holes which correspond to the extrusion plates one by one are formed in the honeycomb-shaped cavity;
the output end of each forming hole is connected with a hole diameter d2A second hollow tube; wherein d is2＞d1；
The first hollow pipe penetrates through the forming hole and extends into the second hollow pipe; the first hollow tube is not long enough to extend out of the second hollow tube.
The outlets of a plurality of extrusion holes on the extrusion plate are connected with a hole diameter d1A first hollow tube; the extrusion plate is connected with the honeycomb-shaped cavity through a flange, and the output end of the forming hole on the honeycomb-shaped cavity is connected with a die with the diameter of d2A second hollow tube; wherein d is2＞d1(ii) a Because the diameter of the first hollow pipe is smaller than that of the second hollow pipe, the second hollow pipe can be sleeved in the first hollow pipe to form a jacketed structure, and the length of the first hollow pipe is not enough to extend out of the second hollow pipe, so that the high-pressure PVDF solution can meet the ultrapure water in the second hollow pipe after coming out of the outlet of the first hollow pipe. If the length of the first hollow pipe exceeds that of the second hollow pipe, the high-pressure PVDF solution from the outlet of the first hollow pipe directly enters the collecting system and cannot react with the ultrapure water. Alternatively to this, the first and second parts may,
the cylinder body is connected with the extrusion plate through a first flange;
the extrusion plate is connected with the honeycomb cavity through a second flange;
the second flange is provided with a water inlet for connection with a second pressure unit of the water inlet system.
Alternatively to this, the first and second parts may,
the second pressure unit is a high-pressure pump;
the high-pressure pump is connected with the water tank, and the water tank is used for containing the ultrapure water. Ultrapure water in the water tank is firstly conveyed to a flange water inlet through a pressure unit, the flange is connected with the extrusion plate and the honeycomb cavity, ultrapure water can be conveyed to the honeycomb cavity through the flange, the output end of the forming hole on the honeycomb cavity is connected with a second hollow pipe, and the ultrapure water is finally conveyed to the second hollow pipe to meet with the high-pressure PVDF solution of the first hollow pipe, so that strip PVDF is directly separated out.
Alternatively to this, the first and second parts may,
the water is arranged in the groove body of the collecting system, and the water surface is higher than the output end of the honeycomb cavity.
The water level in the tank body of the collection system is higher than the output end of the honeycomb-shaped cavity, so that the precipitated strip-shaped PVDF is still underwater in the collection system, and the strip-shaped PVDF still can keep a strip shape, and the subsequent washing and collection of the PVDF are facilitated.
Alternatively to this, the first and second parts may,
the first pressure unit is a high-pressure pump or a screw extrusion device;
the high-pressure pump or the screw extrusion device is connected with a raw material tank, and the raw material tank is used for containing the PVDF slurry.
The PVDF slurry in the raw material tank needs to be fed into the extrusion system through a pressure unit, for example: and a high-pressure pump or a screw extrusion device, wherein both can provide pressure, and the PVDF slurry in the raw material tank is provided with pressure by the high-pressure pump or the screw extrusion device, so that the PVDF slurry can be conveyed to the extrusion molding system to meet with ultrapure water.
The invention is described below in a preferred embodiment:
as shown in fig. 2, it is a block diagram of a precipitation molding apparatus according to another embodiment of the present invention:
comprises a feeding system, an extrusion forming system and a collecting system.
The feeding system is characterized in that a PVDF solution is pressurized by a PVDF raw material tank through a high-pressure pump 1 or a screw extrusion structure, so that the PVDF solution can pass through an extrusion forming system;
the extrusion forming system comprises a cylinder body connected with the feeding system, one end of the cylinder body is connected with an extrusion plate through a flange, a plurality of holes with certain apertures are distributed on the extrusion plate, and the outlet of each hole is connected with a hollow pipe 1. The above is the extruded portion of the PVDF solution. The outer side of the extrusion plate is connected with another cylindrical cavity A through a flange, a sealing plate at one end of the cavity is also composed of holes with a certain aperture, a hollow pipe 2 is also connected with the outer side hole of the sealing plate, the diameter of the hollow pipe 2 is required to be larger than that of the hollow pipe 1, and the length of the hollow pipe 2 is required to be longer than that of the hollow pipe 1.
As shown in fig. 3, which is a schematic cross-sectional view of the barrel-shaped cavity a, the hollow hole 1 is sleeved in the hollow hole 2.
Thus, when assembling, each hollow tube 2 can be sleeved into each hollow tube 1 correspondingly to form a jacket-shaped structure of the tubes 1 and 2. The cavity A is provided with an inlet and is connected with the water tank through a pump 2.
The collecting system is a tank body connected with the extrusion molding, and the liquid level of the tank body is higher than that of the extrusion molding system, so that the extrudate is ensured to be below the water level when entering the tank body.
The raw material tank is used for containing PVDF slurry to be treated, and the feeding pump is used for pumping the PVDF slurry to a cylinder connected with the feeding system; the slurry in the cylinder connected with the feeding system is extruded to the cylindrical cavity A; the water tank is used for receiving ultrapure water required by PVDF forming; the high-pressure pump 2 pumps the ultrapure water to the water inlet of the flange water inlet disc. The hollow pipe 1 in the structure of the cylindrical cavity A is used for discharging PVDF slurry, and the hollow pipe 2 is used for discharging water. The collection tank is used to collect the formed PVDF and the mixed solvent.
The application provides an extrusion forming device of PVDF, the device is during operation, extrude PVDF solution and press into extruding the cylinder through the pump body or screw rod, the solution extrudes through the hole on the extrusion plate in the cylinder; meanwhile, after entering the cylindrical cavity A through the high-pressure pump 1, water is sprayed out through a jacket consisting of the hollow pipe 1 and the hollow pipe 2. Because the length of the hollow pipe 1 is smaller than that of the hollow pipe 2, the PVDF solution meets the water in the jacket between the pipe 1 and the pipe 2 at the outlet of the hollow pipe 1, and then the PVDF is separated out from the solution and enters the collecting tank in a strip shape under the diversion of the water in the hollow pipe 2.
The technical scheme has the following beneficial effects:
the utility model creatively adopts the structure that the extrusion plate is connected with the honeycomb-shaped cavity, and the outlet of the extrusion plate and the outlet of the honeycomb-shaped cavity are respectively provided with a first hollow pipe and a second hollow pipe which are sleeved; based on this, when high-pressure pure water and high-pressure PVDF thick liquids meet at the exit, can directly separate out strip PVDF, and because what directly got into is the aquatic of collection system, be in the state of floating, so can keep strip unchangeable, solved PVDF with the technical problem that the gelatineous inconvenient collection that separates out after.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. A precipitation-molding apparatus, comprising:
the device comprises a feeding system, an extrusion forming system, a water inlet system and a collecting system;
the feeding system comprises a first pressure unit and a second pressure unit, wherein the first pressure unit is used for conveying PVDF raw materials to the extrusion forming system;
the extrusion forming system comprises a cylinder body, an extrusion plate and a honeycomb cavity; the input end of the cylinder is connected with the output end of the feeding system; the output end of the cylinder body is connected with the input end of the extrusion plate; the output end of the extrusion plate is connected with the input end of the honeycomb cavity; the output end of the honeycomb cavity is connected with the collecting system; the input end of the honeycomb cavity is connected with the output end of the water inlet system;
the collection system is used to collect the shaped PVDF.
2. The apparatus of claim 1, wherein:
the water inlet system comprises a water container and a second pressure unit;
the second pressure unit is connected with the input end of the honeycomb-shaped cavity and used for conveying the ultrapure water in the water container to the honeycomb-shaped cavity.
3. The apparatus of claim 2, wherein:
a plurality of extrusion holes are distributed on the extrusion plate, and the outlet of each extrusion hole is connected with a hole diameter d1A first hollow tube;
forming holes which correspond to the extrusion plates one by one are formed in the honeycomb-shaped cavity;
the output end of each forming hole is connected with a hole diameter d2A second hollow tube; wherein d is2＞d1；
The first hollow pipe penetrates through the forming hole and extends into the second hollow pipe; the first hollow tube is not long enough to extend out of the second hollow tube.
4. The apparatus of claim 3,
the cylinder body is connected with the extrusion plate through a first flange;
the extrusion plate is connected with the honeycomb cavity through a second flange;
the second flange is provided with a water inlet for connection with a second pressure unit of the water inlet system.
5. The apparatus of claim 1,
there is water in the collection system, and the surface of water is higher than the output of honeycomb cavity.
6. The device according to claim 1, characterized in that the first pressure unit is a high-pressure pump or a screw extrusion device;
the high-pressure pump or the screw extrusion device is connected with a raw material tank, and the raw material tank is used for containing the PVDF raw material.
7. The apparatus of claim 2, wherein the second pressure unit is a high pressure pump;
the high-pressure pump is connected with the water tank, and the water tank is used for containing the ultrapure water.
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| CN202021156524.7U CN212246848U (en) | 2020-06-19 | 2020-06-19 | Precipitation forming device |
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| CN202021156524.7U CN212246848U (en) | 2020-06-19 | 2020-06-19 | Precipitation forming device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111690167A (en) * | 2020-06-19 | 2020-09-22 | 山西汾西重工有限责任公司 | Precipitation forming device and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111690167A (en) * | 2020-06-19 | 2020-09-22 | 山西汾西重工有限责任公司 | Precipitation forming device and method |
| CN111690167B (en) * | 2020-06-19 | 2024-04-26 | 山西汾西重工有限责任公司 | Precipitation forming device and method |
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