CN106323072B - Vacuum freeze drier resistant heat exchanger plate - Google Patents
Vacuum freeze drier resistant heat exchanger plate Download PDFInfo
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- CN106323072B CN106323072B CN201610844154.8A CN201610844154A CN106323072B CN 106323072 B CN106323072 B CN 106323072B CN 201610844154 A CN201610844154 A CN 201610844154A CN 106323072 B CN106323072 B CN 106323072B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/12—Elements constructed in the shape of a hollow panel, e.g. with channels
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/06—Pretreated ingredients and ingredients covered by the main groups C08K3/00 - C08K7/00
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
- C09D163/10—Epoxy resins modified by unsaturated compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1687—Use of special additives
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
- F28F19/02—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Polymers & Plastics (AREA)
- Medicinal Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Paints Or Removers (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a kind of vacuum freeze drier resistant heat exchanger plates, including upper plate, lower plate, isolating bar and strip of paper used for sealing square steel, upper plate is opposite with lower plate front and mutually welds to form hollow heat exchanger plate by strip of paper used for sealing square steel, isolating bar is fixed in hollow heat exchanger plate the medium channel formed for the heat transfer medium that circulates, upper plate and the contact surface of lower plate are equipped with resistance to pollution layer, constant current device is equipped in medium channel, for the heat transfer medium in permeable medium channel.One layer of resistance to pollution layer is coated on heat exchanger plate, corrosive substance is prevented to corrode heat exchanger plate, improve the service life of heat exchanger plate, the setting of constant current device, heat transfer medium is set to flow through medium channel as much as possible with uniform flux, being uniformly distributed for heat on heat exchanger plate has been effectively ensured, has improved the heat exchange performance of heat exchanger plate, solves the problems, such as that existing heat exchanger plate does not adapt to the occasion for having strict demand to heat exchange.
Description
Technical field
The present invention relates to vacuum freeze field, more particularly to a kind of vacuum freeze drier resistant heat exchange
Plate.
Background technology
The operation principle of vacuum freeze drier is to allow product to freeze first, then provides suitable rise under vacuum conditions
Magnificent heat makes moisture in frozen product or solvent conversion at water vapour, achievees the purpose that product dehydrate, wherein product freezes
With sublimation process carried out on heat exchanger plate in drying box.
The existing heat exchanger plate used is all hollow heat exchanger plate, by the medium channel of hollow formation, then passes to biography
Thermal medium and realize heat exchange.For existing heat exchanger plate there is heat transfer unevenness in diabatic process, heat transfer medium flow-disturbing is larger, heat
The problems such as power board shaking amplitude is larger causes heat exchanger plate to cannot be used for the occasion for having strict demand to heat exchange, constrains
The development of heat exchanger plate.Meanwhile the surface of the existing heat exchanger plate used is almost without dedicated resistant release coating is coated, all
Be realized by the physical property of heat exchanger plate itself it is antifouling anti-sticking, it is clear that its effect be it is undesirable, heat exchanger plate weight
After multiple use, hot spot can occur due to cohesive difficult cleaning spot often, so lead to that broken hole occurs in heat exchanger plate and
It scraps.Meanwhile in heat exchanging process, the anti-corrosion paint film that the cyclic strains of high temperature to low temperature cause heat exchanger plate surface to coat exists
After reuse, it may appear that cracking, blistering, warpage the problems such as, cause heat exchanger plate occur depainting phenomenon, the use of heat exchanger plate
Period is less than expection.
Invention content
The goal of the invention of the present invention is：In view of the above problems, a kind of vacuum freeze drier resistant is provided
Heat exchanger plate, to solve above-mentioned deficiency.
The technical solution adopted by the present invention is as follows：A kind of vacuum freeze drier resistant heat exchanger plate, including upper plate, under
Plate, isolating bar and strip of paper used for sealing square steel, upper plate and lower plate front are opposite and mutually weld to form hollow heat exchanger plate by strip of paper used for sealing square steel, every
The medium channel that is formed for circulate heat transfer medium is fixed on from item in hollow heat exchanger plate, and upper plate and lower plate constitute medium channel
Be respectively formed upper plate and the inner wall of lower plate on one side, the another side of upper plate and lower plate forms contact surface, contact of the upper plate with lower plate
Face is equipped with resistance to pollution layer, is equipped with constant current device in medium channel, and constant current device includes that two or more is mounted side by side and and isolating bar
Parallel constant current element.
Due to the setting of above structure, one layer of resistance to pollution layer is coated on heat exchanger plate, resistance to pollution layer is by a kind of dedicated resistant
Release coating coats, and resistant release coating can be teflon coating, can also be fluororesin release coating, these
Special resistant release coating can be effectively prevent in freezing dry process, some substances in material are bonded in heat exchanger plate
On, it prevents corrosive substance from corroding heat exchanger plate, while preventing substance from bonding, and plays corrosion-resistant effect, and then improve
The service life of heat exchanger plate, better than the existing heat exchanger plate used；The setting of constant current device can effectively be situated between in steady heat transfer
Matter flows in medium channel, reduces its turbulent flow effect, heat transfer medium is made to flow through medium channel as much as possible with uniform flux, have
Effect ensure that being uniformly distributed for heat on heat exchanger plate, so that heat exchanger plate is realized uniformly transfer heat, improves heat exchanger plate
Heat exchange performance.
Further, for the anti-stick ability of the resistant for improving resistance to pollution layer, while resistance to pollution layer is reduced to heat exchanger plate diabatic process
Adverse effect, resistance to pollution layer is resistant release coating, and resistant release coating is made of the raw material of following parts by weight：Vinylite
45-50 parts, 1-3 parts of modified graphene, 4-6 parts of Nano titanium dioxide, 7-9 parts of Cu and its oxides powder, aluminium powder 12-15
1-2 parts of part, 15-18 parts of butyl acetate, 3-9 parts of diacetone alcohol, 3-5 parts of SiO 2 powder, 1-2 parts of dispersant and levelling agent.
Among the above, modified graphene can greatly improve the synthesis of resistant release coating as corrosion-resistant, resistance to osmoticum
Performance improves the heat transfer coefficient of coating while providing the corrosion-resistant performances such as impermeable, reduces coating and conducts heat to heat exchanger plate
The influence of process makes coating have good heat conductivility；Cu and its oxides powder can be in the surface shape of the coating of formation
At micrometer structure, it can play that reduce macromolecular dirty in the surface of coating slowly long nanowire at any time, these nano wires
The contact area of object and coating makes sprawling for macromolecular dirt be restricted, and has centainly macroscopically showing, coating
Hydrophobic dirt-removing performance, with nano-titanium dioxide collective effect, the compact nanometer structure that can be formed in coating surface is effectively prevent
Materials from bonding on coating, and then for heat exchanger plate provides anti-adhesion performance；Aluminium powder can form continuous uninterrupted in coating
Aluminium film, and then cover the pin hole that is likely to form in coating forming procedure, ensure the consistency of coating, reduce oozing for external substance
Thoroughly, the anti-sticking ability of coating is further increased, meanwhile, the weatherability and high temperature resistance of coating also can be improved in the addition of aluminium powder,
Influence of the high temperature heat that reduction heat exchanger plate generates in heat exchanging process to coating, makes the heat resisting temperature of coating can reach
300 DEG C or more, coating is not easily cracked, warpage and blistering, coating are more durable；Butyl acetate and diacetone alcohol are used cooperatively
Can ensure film-formation result when coating drying, compared to single solvent, two kinds of solubility parameters are close and boiling point similar in solvent
Blending can achieve the effect that mutual supplement with each other's advantages, overcome the disadvantage that single solvent is intrinsic, the film-formation result of coating is made to be more easy to obtain
It ensures, success rate is high.
Further, the preparation method of resistant release coating includes the following steps：
Step 1, the graphene for being 10-20nm by thickness and absolute ethyl alcohol are 1 in mass ratio：80 proportion relation be blended in
It in blender and is sufficiently stirred, the silane coupling agent that 0.6wt% is then added stirs evenly, then mixture is put into ultrasonic wave breast
It is fully dispersed to change disperser, finally takes out mixture and is put into baking oven and dry, obtain modified graphene, it is spare；
Vinylite and dispersant are added in reactor step 2, then use blender with the rotating speed pair of 800r/min
Blending ingredients are stirred up to being uniformly dispersed, and obtain base-material；
Step 3 will stir evenly in modified graphene addition diacetone alcohol, obtains graphene dispersing solution, base-material is added
It is uniformly mixed in graphene dispersing solution, obtains mixed liquor；
Step 4, by SiO 2 powder grinding go it is thick after, with Nano titanium dioxide, Cu and its oxides powder and aluminium
Powder is added in butyl acetate together, is uniformly mixed, and obtains mixture, adds mixture into mixed liquor, with blender pair
Mixed liquor is sufficiently stirred, mixing speed 800r/min, until being uniformly dispersed, obtains initial point；
Levelling agent is added in initial point step 5, and uncured coating is obtained after being uniformly dispersed with dispersion machine, will not
Cured coating is pumped into the storage tank of air gun, and the surface of processed matrix is then sprayed on air gun, is stood
To coating levelling, vacuum bakeout film-forming, then keeps the temperature 10min again at 140 DEG C, cools to the furnace after room temperature to obtain the final product.
Preferably, one end from corresponding strip of paper used for sealing square steel maximum distance of isolating bar, forms with the isolating bar of adjacent side
Medium turns to mouth, and constant current device is set to medium and turns at mouth.Constant current device, which is set to medium turning point, can make diverted Jie
Matter is flowed with the direction for being parallel to isolating bar, is reduced as far as the flow-disturbing effect of fluid, is made medium as much as possible with uniform flow
Amount flows through medium channel, and being uniformly distributed for heat on heat exchanger plate has been effectively ensured, and reduces the arrangement quantity of constant current element, saves
Manufacturing cost.
Further, in order to preferably implement the constant current element of the present invention, constant current element is diamond shape convex block, and diamond shape convex block is fixed
Mounted on the inner wall of upper plate, either diamond shape convex block and upper plate or the joint face of lower plate are diamond shape on the inner wall of lower plate, and diamond shape is convex
The center of block bulges to form cambered surface.
As an improvement scheme, diamond shape convex block is respectively and fixedly installed on the inner wall of upper plate or the inner wall of lower plate, on
The diamond shape convex block of plate and the diamond shape convex block of lower plate are symmetrically set.With more uniformly water conservancy diversion and medium is shunted, is realized preferably
Uniformly transfer heat.
As a kind of alternative, constant current element is the floor of sector, floor be fixedly mounted on upper plate inner wall or
On the inner wall of lower plate.The setting of floor can not only play the role of water conservancy diversion shunting, moreover it is possible to which the intensity for increasing heat exchanger plate makes heat
Power board is not susceptible to deform, and enhances the structural stability of heat exchanger plate.
As an improvement scheme, floor is respectively and fixedly installed on the inner wall of upper plate and the inner wall of lower plate, the rib of upper plate
Plate and the floor of lower plate are symmetrically set, or mutually stagger setting, with more uniformly water conservancy diversion and shunt medium, realize more preferable
Ground uniformly transfer heat.
In conclusion by adopting the above-described technical solution, the beneficial effects of the invention are as follows：
1, one layer of resistance to pollution layer is coated on heat exchanger plate, resistance to pollution layer is coated by a kind of dedicated resistant release coating,
Resistant release coating can be teflon coating, can also be fluororesin release coating, these special resistant release coatings
It can effectively prevent in freezing dry process, some substances in material are bonded on heat exchanger plate, prevent corrosive substance
Corrode heat exchanger plate, while preventing substance from bonding, and plays corrosion-resistant effect, and then it is all to improve using for heat exchanger plate
Phase solves the problems, such as that heat exchanger plate service life is short, easy bonding material better than the existing heat exchanger plate used；
2, the setting of constant current device, can effectively steady heat transfer medium flowed in medium channel, reduce its turbulent flow effect,
It prevents heat exchanger plate from excessively rocking, reduces heat transfer medium to the impact force of heat exchanger plate, make heat transfer medium as much as possible with uniform
Flow flows through medium channel, and being uniformly distributed for heat on heat exchanger plate has been effectively ensured, heat exchanger plate is enable to realize uniform biography
Heat improves the heat exchange performance of heat exchanger plate, solves existing heat exchanger plate and does not adapt to have strict demand to heat exchange
The problem of occasion；
3, by especially manufacturing a kind of resistant release coating, keep the resistant anti-adhesion effects of resistance to pollution layer more excellent, while to heat
Exchange process influences smaller, improves adaptability of the resistance to pollution layer to high/low temperature, so that coating is not easily cracked, warpage and blistering, coating
Resistance to pollution layer that is more durable, being applied as better than teflon coating（Teflon coating high and low temperature resistance is poor）.
Description of the drawings
Fig. 1 is a kind of vacuum freeze drier resistant heat exchanger plate structural schematic diagram of the present invention；
Fig. 2 is the structural schematic diagram of Section A-A in Fig. 1；
Fig. 3 is the part-structure schematic diagram of section B-B in Fig. 1；
Fig. 4 is the partial enlarged view of C portion in Fig. 2；
Fig. 5 is a kind of structural schematic diagram of embodiment of Fig. 3；
Fig. 6 is the structural schematic diagram of the another embodiment of Fig. 3；
Fig. 7 is the rib structure front view of the present invention；
Fig. 8 is the structural schematic diagram of the diamond shape convex block of Fig. 7；
Fig. 9 is the structural schematic diagram of the carbon fiber composite board of the present invention；
Figure 10 is the porous metals paillon partial enlargement structural representation of the present invention.
It is marked in figure：1 is upper plate, and 2 be lower plate, and 3 be isolating bar, and 4 be strip of paper used for sealing square steel, and 5 be medium channel, and 6 be inner wall, 7
It is medium inlet for contact surface, 8,9 be media outlet, and 10 be resistance to pollution layer, and 11 be constant current device, and 12 be diamond shape convex block, and 13 be rib
Plate, 14 be carbon fiber composite board, and 1401 be porous metallic layers, and 1402 be carbon fiber board.
Specific implementation mode
Below in conjunction with the accompanying drawings, the present invention is described in detail.
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
As shown in Figure 1 to Figure 3, a kind of vacuum freeze drier resistant heat exchanger plate, including upper plate 1, lower plate 2, isolation
Item 3 and strip of paper used for sealing square steel 4, upper plate 1 is opposite with 2 front of lower plate and mutually welds to form hollow heat exchanger plate by strip of paper used for sealing square steel 4, is isolated
Item 3 is fixed in hollow heat exchanger plate the medium channel 5 formed for the heat transfer medium that circulates, and it is logical that upper plate 1 and lower plate 2 constitute medium
Road 5 is respectively formed upper plate 1 and the inner wall 6 of lower plate 2, the another side formation contact surface 7 of upper plate 1 and lower plate 2, in strip of paper used for sealing side on one side
The symmetric position opening of 4 joint of steel is respectively formed medium inlet 8 and media outlet 9, and heat transfer medium is entered by medium inlet 8
In the medium channel 5 of heat exchanger plate, then heat exchanger plate is left through media outlet 9, the contact surface 7 of upper plate 1 and lower plate 2 is equipped with
Resistance to pollution layer 10, medium channel 5 is interior to be equipped with constant current device 11, and constant current device 11 is mounted side by side including two or more and is put down with isolating bar
Capable constant current element.
Furthermore, resistance to pollution layer 10 be resistant release coating, resistant release coating by following parts by weight raw material group
At：45-50 parts of vinylite, 1-3 parts of modified graphene, 4-6 parts of Nano titanium dioxide, Cu and its oxides powder 7-9
Part, 12-15 part of aluminium powder, 15-18 parts of butyl acetate, 3-9 parts of diacetone alcohol, 3-5 parts of SiO 2 powder, 1-2 parts of dispersant with
1-2 parts of levelling agent.
Furthermore, the preparation method of resistant release coating includes the following steps：
Step 1, the graphene for being 10-20nm by thickness and absolute ethyl alcohol are 1 in mass ratio：80 proportion relation be blended in
It in blender and is sufficiently stirred, the silane coupling agent that 0.6wt% is then added stirs evenly, then mixture is put into ultrasonic wave breast
It is fully dispersed to change disperser, finally takes out mixture and is put into baking oven and dry, obtain modified graphene, it is spare；
Vinylite and dispersant are added in reactor step 2, then use blender with the rotating speed pair of 800r/min
Blending ingredients are stirred up to being uniformly dispersed, and obtain base-material；
Step 3 will stir evenly in modified graphene addition diacetone alcohol, obtains graphene dispersing solution, base-material is added
It is uniformly mixed in graphene dispersing solution, obtains mixed liquor；
Step 4, by SiO 2 powder grinding go it is thick after, with Nano titanium dioxide, Cu and its oxides powder and aluminium
Powder is added in butyl acetate together, is uniformly mixed, and obtains mixture, adds mixture into mixed liquor, with blender pair
Mixed liquor is sufficiently stirred, mixing speed 800r/min, until being uniformly dispersed, obtains initial point；
Levelling agent is added in initial point step 5, and uncured coating is obtained after being uniformly dispersed with dispersion machine, will not
Cured coating is pumped into the storage tank of air gun, and the surface of processed matrix is then sprayed on air gun, is stood
To coating levelling, vacuum bakeout film-forming, then keeps the temperature 10min again at 140 DEG C, cools to the furnace after room temperature to obtain the final product.
In order to preferably explain the anti-corrosion antifouling paint with the implementation present invention, following table 1 shows that the hard of the present invention is poly-
Several specific formulas of urethane material, it should be noted that formula is primarily to preferably implement the present invention, and be not in detail below
In order to limit the present invention.
Table 1：
Note：1. impact strength by GB/T 1732-93 regulation measure, adhesive force by GB/T9286 regulation；Adhesive force
It is divided into 0-5 grades, wherein 0 grade of expression is best；
It is measured 2. contaminated resistance is the stain resistant method of testing provided using gram Lay benefactor department, is to be applied before and after spray
The rate of descent of reflectance factor is smeared to evaluate stain resistance；
As can be drawn from Table 1, resistant release coating of the invention has good impact resistance, strong adhesive force resistance to be stained with
Dirt is had excellent performance.
It being preferably carried out mode, one end from corresponding strip of paper used for sealing square steel maximum distance of isolating bar 3, with neighbour as one kind
The isolating bar 3 on side forms medium and turns to mouth 15, is turned at mouth 15 as shown in Figure 1, constant current device 11 is set to medium, certain constant current
Device 11 may also set up the other positions parallel with isolating bar 3.
As an implementation, as shown in Figure 6 and Figure 8, constant current element is diamond shape convex block 12, and diamond shape convex block 12 fixes peace
Mounted in the inner wall 6 of upper plate 1, either diamond shape convex block 12 and upper plate 1 or the joint face of lower plate 2 are diamond shape on the inner wall 6 of lower plate 2,
The center of diamond shape convex block 12 bulges to form cambered surface.
As an improvement ground embodiment, diamond shape convex block 12 is respectively and fixedly installed to the inner wall 6 or lower plate 2 of upper plate 1
Inner wall 6 on, the diamond shape convex block 12 of upper plate 1 is symmetrically set with the diamond shape convex block 12 of lower plate 2.
As a kind of alternative embodiment, as shown in Fig. 3, Fig. 5 and Fig. 7, constant current element is the floor 13 of sector, floor
13 can only be fixedly mounted on the inner wall of upper plate 1, or only be fixedly mounted on the inner wall of lower plate 2, be situated between to heat transfer with realizing
The water conservancy diversion of matter orients, but this set effect is not optimal.
As an improvement ground embodiment, floor 13 is respectively and fixedly installed to the inner wall 6 of upper plate 1 and the inner wall 6 of lower plate 2
On, the floor 13 of upper plate 1 is symmetrically set with the floor 13 of lower plate 2, or mutually staggers setting, as shown in figure 3, when mutual
When being symmetrical arranged, the heat transfer medium for forming the steering of eddy flow shoved from the channel formed between two floors 13 is sharp, and heat transfer medium is more
Heat exchanger plate is flowed evenly through, preferably uniformly transfer heat is realized；As shown in figure 5, when mutually staggering setting, floor 13 is mutual
Between form a plurality of directed access, cause heat transfer medium to be subdivided into a plurality of floor 13 that trickled, and then realize preferably
Uniformly transfer heat.
Furthermore, it is contemplated that in heat exchanging process, the cyclic strains of high temperature to low temperature cause heat exchanger plate table
After repeated, appearance cracking, blistering, warpage equiprobability will greatly increase the resistance to pollution layer 10 of face coating, simultaneously, it is contemplated that only
It can not ensure heat transfer medium uniformly transfer heat by constant current device 11, in order to further extend service life and the guarantor of resistance to pollution layer 10
The inner wall of card uniformly transfer heat, upper plate 1 and lower plate 2 is equipped with carbon fiber composite board 14, as shown in Fig. 2, Fig. 4, Fig. 9 and Figure 10, on
Plate 1 and the inner wall of lower plate 26 are equipped with carbon fiber composite board 14, and carbon fiber composite board 14 includes porous metallic layers 1401 and carbon fiber
Plate 1402 is tieed up, the upper and lower surface of porous metallic layers 1401 is separately connected carbon fiber board 1402, and carbon fiber composite board 14 is transmitting heat
While amount, due to porous metallic layers structure, the variation of heat is after the absorption of porous metallic layers structure, it will with smaller
Variation or it is unchanged show, and then dissipated that the heat transfer occurred by the unusual fluctuation of heat transfer medium is uneven to ask
Topic, extends the reaction time that heat exchanger plate changes heat unusual fluctuation（The better material of heat transfer property, heat dissipation heat dissipation performance are also got over
It is good, it is higher to the sensibility of thermal change）, play the role of steady heat transfer homogeneous media heat transfer, make resistance to pollution layer 10 by
Cyclical heat stress substantially become smaller, and then extend the service life of resistance to pollution layer 10.
It is worth noting that the technical solution for the carbon fiber composite board 14 that the present invention uses not is served only for having resistance to pollution layer
In the heat exchanger plate of 10 structures, when technical scheme of the present invention is in the existing heat exchanger plate without resistance to pollution layer used
When, it can also solve the problems, such as existing heat exchanger plate heat exchange unevenly, and its effect played becomes apparent from, heat exchanger plate heat exchange
Quality is obviously improved, and therefore, carbon fiber composite structure of the invention is also applied in existing heat exchanger plate.
Furthermore, porous metallic layers 1401 are superimposed by several porous metals paillons and are formed, as shown in figure 9, certainly
Porous metallic layers 1401 can be made of a porous metals paillon, can be also made of 5 porous metals paillons（5 porous metals
Paillon cost performance highest）, select the number of porous metals paillon according to actual needs.
Furthermore, the thickness of carbon fiber composite board 14 is 0.5-2mm（Preferably 1.3mm）, respectively with upper plate 1 and
Lower plate 2 is fixedly connected.
The thickness of porous metallic layers 1401 is 0.5mm as a preferred implementation manner, and the thickness of carbon fiber board 1402 is
0.4mm。
In order to preferably extend the service life for making the carbon fiber composite board 14 of the present invention, prevent heat transfer medium from polluting carbon fiber
Composite plate 14 is tieed up, porous metallic layers 1401 form carbon fiber composite board 14 with carbon fiber board 1402 by way of compression moulding,
The edge of carbon fiber composite board 14 passes through 1402 edge sealing of carbon fiber board.
It being preferably carried out mode as one kind, as shown in Figure 10, porous metals paillon is matrix phase by Cu-Al solid solution
Metal polyporous material is made, thickness 0.1-0.3mm, preferably 0.15mm, porosity 60-65%.
Furthermore, the preparation method of porous metals paillon includes：
Cu powder and Al powder are 4 in mass ratio by step 1:6 are uniformly mixed to form mixture, are then 1 in mass ratio:26
It adds mixture into the mixed solution of ethyl alcohol, ammonium hydrogen carbonate and PVB binders, wherein ethyl alcohol, ammonium hydrogen carbonate and PVB binders
Mass ratio be 50：3:1, it is uniformly mixed, obtains suspension；
Step 2, by the die cavity of suspension injection moulding mold, drying after forming forms diaphragm；
Diaphragm is packed into the sintering die cavity to match with the diaphragm shape by step 3, and sintering temperature is risen to 580 DEG C, is protected
Warm 30min, then 1150 DEG C are warming up to, it keeps the temperature 90min, then furnace cooling to room temperature, finally takes out diaphragm to obtain the final product.
Due to being added to carbon fiber composite board, the weight of heat exchanger plate increased, in order to reduce the weight of heat exchanger plate,
The isolating bar is hollow isolating bar 3, as shown in Figures 2 to 6, isolating bar 3 by the connection type of vacuum brazing and upper plate 1 and
Lower plate 2 is fixedly connected.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (7)
1. a kind of vacuum freeze drier resistant heat exchanger plate, including upper plate, lower plate, isolating bar and strip of paper used for sealing square steel, upper plate and
Lower plate front is opposite and mutually welds to form hollow heat exchanger plate by strip of paper used for sealing square steel, and isolating bar is fixed on shape in hollow heat exchanger plate
At the medium channel for the heat transfer medium that circulates, what upper plate and lower plate constituted medium channel is respectively formed upper plate and lower plate on one side
The another side of inner wall, upper plate and lower plate forms contact surface, which is characterized in that and upper plate and the contact surface of lower plate are equipped with resistance to pollution layer,
Be equipped with constant current device in medium channel, constant current device include it is more than two be mounted side by side and the constant current element parallel with isolating bar,
For the heat transfer medium in permeable medium channel；Resistance to pollution layer is resistant release coating, and resistant release coating is by following parts by weight
Raw material forms：45-50 parts of vinylite, 1-3 parts of modified graphene, 4-6 parts of Nano titanium dioxide, Cu and its oxides powder
It is 7-9 parts last, 12-15 parts of aluminium powder, 15-18 parts of butyl acetate, 3-9 parts of diacetone alcohol, 3-5 parts of SiO 2 powder, dispersant 1-2
1-2 parts of part and levelling agent.
2. vacuum freeze drier as described in claim 1 resistant heat exchanger plate, which is characterized in that resistant release coating
Preparation method includes the following steps：
Step 1, the graphene for being 10-20nm by thickness and absolute ethyl alcohol are 1 in mass ratio：80 proportion relation is blended in stirring
It in device and is sufficiently stirred, the silane coupling agent that 0.6wt% is then added stirs evenly, then mixture is put into ultrasonic emulsification point
It is fully dispersed to dissipate device, finally takes out mixture and is put into baking oven and dry, obtain modified graphene, it is spare；
Vinylite and dispersant are added in reactor step 2, then use blender with the rotating speed of 800r/min to mixing
Component is stirred up to being uniformly dispersed, and obtains base-material；
Step 3 will stir evenly in modified graphene addition diacetone alcohol, obtains graphene dispersing solution, graphite is added in base-material
It is uniformly mixed in alkene dispersion liquid, obtains mixed liquor；
Step 4, by SiO 2 powder grinding go it is thick after, with Nano titanium dioxide, Cu and its oxides powder and aluminium powder one
It with being added in butyl acetate, is uniformly mixed, obtains mixture, add mixture into mixed liquor, with blender to mixing
Liquid is sufficiently stirred, mixing speed 800r/min, until being uniformly dispersed, obtains initial point；
Levelling agent is added in initial point step 5, and uncured coating is obtained after being uniformly dispersed with dispersion machine, will be uncured
Coating be pumped into the storage tank of air gun, be then sprayed on the surface of processed matrix with air gun, stand to applying
After laminar flow is flat, vacuum bakeout film-forming, then keeps the temperature 10min again at 140 DEG C, cools to the furnace after room temperature to obtain the final product.
3. vacuum freeze drier as described in claim 1 resistant heat exchanger plate, which is characterized in that isolating bar from opposite
The one end for the strip of paper used for sealing square steel maximum distance answered forms medium with the isolating bar of adjacent side and turns to mouth, and constant current device is set to medium and turns
To at mouth.
4. vacuum freeze drier as claimed in claim 3 resistant heat exchanger plate, which is characterized in that constant current element is diamond shape
Convex block, diamond shape convex block are fixedly mounted on the inner wall of upper plate either diamond shape convex block and upper plate or the company of lower plate on the inner wall of lower plate
Junction is diamond shape, and the center of diamond shape convex block bulges to form cambered surface.
5. vacuum freeze drier as claimed in claim 4 resistant heat exchanger plate, which is characterized in that diamond shape convex block is solid respectively
On the inner wall of upper plate or the inner wall of lower plate, the diamond shape convex block of upper plate and the diamond shape convex block of lower plate are symmetrically set for Dingan County
It sets.
6. vacuum freeze drier as claimed in claim 3 resistant heat exchanger plate, which is characterized in that constant current element is sector
The floor in face, floor are fixedly mounted on the inner wall of upper plate or the inner wall of lower plate.
7. vacuum freeze drier as claimed in claim 6 resistant heat exchanger plate, which is characterized in that floor is fixed respectively to pacify
On the inner wall of upper plate and the inner wall of lower plate, the floor of upper plate and the floor of lower plate are symmetrically set, or mutually stagger
Setting.
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| CN201610844154.8A CN106323072B (en) | 2016-09-23 | 2016-09-23 | Vacuum freeze drier resistant heat exchanger plate |
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| CN109556433A (en) * | 2018-12-20 | 2019-04-02 | 佛山市天地元净化设备有限公司 | A kind of high efficient heat exchanging structure of compressed air freezing type drier |
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