CN208012242U - Freeze-drying unit and milling device for thermosetting powder coating - Google Patents
Freeze-drying unit and milling device for thermosetting powder coating Download PDFInfo
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- CN208012242U CN208012242U CN201820071368.0U CN201820071368U CN208012242U CN 208012242 U CN208012242 U CN 208012242U CN 201820071368 U CN201820071368 U CN 201820071368U CN 208012242 U CN208012242 U CN 208012242U
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Abstract
A kind of freeze-drying unit and milling device for thermosetting powder coating, wherein freeze-drying unit includes several set refrigerant-cycle systems and air treatment system；The refrigerant-cycle systems include compressor, condenser, shut-off valve, device for drying and filtering, expansion valve, evaporator and the gas-liquid separator for recycling connection according to this by pipeline；The wind direction of coming of the evaporator is equipped with air intake filter；The milling device includes scratch system and above-mentioned freeze-drying unit, and the evaporator setting for being freeze-dried unit is additionally provided with the air-introduced machine that the air after being freeze-dried evaporator introduces scratch system between air intake filter and scratch system, and in scratch system.The utility model is a kind of freeze-drying unit energy-efficient, applied widely with refrigeration+dehumidification function, it has the characteristics that efficiency height, preventing freeze in winter, leaving air temp adjustable range are wider, easy for installation, simple and compact for structure low with operating cost.
Description
Technical field
The utility model is related to manufacture field more particularly to a kind of freeze driers for thermosetting powder coating of being milled
Group and milling device.
Background technology
Thermosetting powder coating is a kind of not solvent-laden novel solid powder type coating preparation, have it is solvent-free, pollution-free, can
Recycling, saves the energy and resource, reduces labor intensity the features such as high with coating machinery intensity at environmental protection, at present in metal spraying row
Industry has obtained development at full speed, and the resin as the main film forming matter of powdery paints is the lower organic polymer polymerization of molecular weight
Object, these resins have a kind of physical property：At a lower temperature, it shows as hard and crisp vitreousness, works as temperature rise
When to certain numerical value, resin starts the state for being changed into certain elasticity and generating adhesion, is less than this temperature, resin returns again
Nonadherent vitreousness is returned to, the glassy state of resin and the temperature of adhesion state phase co-conversion are called the glass transition temperature of resin.
Different resins has different glass transition temperatures, if the glass transition temperature of epoxy resin and polyester resin is at 50 DEG C or so, increases
The glass transition temperature of photo etching (701) is at 30 DEG C or so, and the glass transition temperature of liquid levelling agent is then less than 0 DEG C.Powdery paints is matched
The material additive amount of low Tg is bigger in side, then the glass transition temperature of system is lower.
For the glass transition temperature of most of thermosetting powder coatings at 50 DEG C or so, Subtropic of China Area during Summer temperature can be high
Up to 37 DEG C, and water capacity is big, and the fresh air of flour mill sucking must be processed to dry-bulb temperature tg≤12 DEG C, and d≤8g/kg is dry
Air can just prevent powder agglomates.Currently, most thermosetting powder coating manufacturers use this scheme：
7~10 DEG C of chilled water is produced using cooling-water machine and is stored in attemperater；
7~10 DEG C in water tank of chilled water is delivered to surface cooler with water pump and carries out hot friendship with the fresh air from outdoor sucking
It changes, after air carries out freeze-drying process, is sent into flour mill and cools down to powder thermosetting material.
The representative technical solution of said program is a kind of small-sized as disclosed in Chinese patent ZL201521017369.X
Water-cooled cooling dehumidification device, this scheme belongs to secondary heat exchange using water as refrigerating medium, and needs to configure the power-equipments such as water pump,
There are 25%~30% energy losses, are unfavorable for energy saving.In actual use, also frequent occurrence winter draining be not thorough or
Forget to drain and lead to surface cooler bursting by freezing, causes unnecessary economic loss.
Due to the use of water as refrigerating medium, unit leaving water temperature cannot be below 2 DEG C, no it will cause heat exchanger tube bursting by freezing, this
The production for limiting the lower thermosetting powder coating of certain glass transition temperatures needs to add in chilled water system antifreeze
Liquid, and refrigeration equipment and surface cooler also need to re-start design, pipeline heat insulation etc. is also required to thickening processing, this, which just brings, makes
It is higher with cost, the larger problem of maintenance difficulties.
Utility model content
The purpose of this utility model is to provide a kind of freeze-drying unit for thermosetting powder coating and the dress that is milled
It sets, it has the advantages that structure is reliable, energy-efficient and applicability is good.
The utility model is achieved like this, a kind of freeze-drying unit for thermosetting powder coating, feature
It is, it includes several set refrigerant-cycle systems and the air-treatment system with the endothermic section cooperation of the refrigerant-cycle systems
System；The refrigerant-cycle systems include compressor, condenser, shut-off valve, the dry filter for recycling connection according to this by pipeline
Device, expansion valve, evaporator and gas-liquid separator；The wind direction of coming of the evaporator is equipped with air intake filter.
The freeze-drying unit for being used for thermosetting powder coating includes two sets of refrigerant-cycle systems；First set refrigerant
The circulatory system includes the first compressor for recycling connection according to this by pipeline, the first condenser, the first shut-off valve, first dried
Filter, the first expansion valve, first evaporator and the first gas-liquid separator；Second set of refrigerant-cycle systems includes passing through pipeline
The second compressor of connection, the second condenser, the second shut-off valve, the second device for drying and filtering, the second expansion valve, second are recycled according to this
Grade evaporator and the second gas-liquid separator；The first evaporator and second level evaporator are arranged according to this from air intake filter
In the fresh air channel of process.
The air intake filter includes at least the primary filter and medium effeciency filter integrated, and primary filter
Inlet side and the air side of medium effeciency filter be equipped with differential manometer.
Preferably：The compressor is rolling rotor-type, vortex, piston type or screw compressor.
Preferably：The condenser is shell-tube type, bushing type, board-like or finned cooler.
Preferably：The expansion valve is heating power expansion valve, electric expansion valve or capillary.
Preferably：The evaporator is finned or micropassage type evaporator.
The air intake filter material is polyurethane foam cotton, glass fibre cotton, nylon wire, non-woven fabrics, PP or stainless steel
Metal mesh.
The utility model also describes a kind of milling device, it includes scratch system, which is characterized in that it further includes above-mentioned
It is freeze-dried unit, the evaporator for being freeze-dried unit is arranged between air intake filter and scratch system, and in scratch system
It is additionally provided with the air-introduced machine that the air after being freeze-dried evaporator introduces scratch system.
The beneficial effects of the utility model are：The utility model is a kind of energy-efficient, suitable with refrigeration+dehumidification function
With the wide freeze-drying unit of range, it overcomes the problems, such as, and common handpiece Water Chilling Units efficiency is low, of high cost, winter easy bursting by freezing, has
The features such as efficiency height, preventing freeze in winter, leaving air temp adjustable range be wider, easy for installation, floor space smaller；It is improving thermosetting
Production efficiency can be greatly improved while property powdery paints quality, and the installation space of cooling system can be saved, simplifies structure,
Reduce operating cost.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model one embodiment.
1, first compressor 2, the first condenser 3, the first shut-off valve 4, the first device for drying and filtering 5, first in the figure
Expansion valve 6, first evaporator 7, the first gas-liquid separator 8, the second compressor 9, the cut-off of the second condenser 10, second
Valve 11, the second device for drying and filtering 12, the second expansion valve 13, second level evaporator 14, the second gas-liquid separator 15, air inlet
Filter 16, air-introduced machine 17, scratch system.
Specific implementation mode
Specific embodiment of the present utility model is described further below in conjunction with the accompanying drawings.
As shown in Figure 1, the utility model is realized in this way, the freeze-drying unit for thermosetting powder coating
The air treatment system coordinated including several set refrigerant-cycle systems and with the endothermic section of the refrigerant-cycle systems；It is described
Refrigerant-cycle systems include the compressor for recycling connection according to this by pipeline, condenser, shut-off valve, device for drying and filtering, expansion
Valve, evaporator and gas-liquid separator；The wind direction of coming of the evaporator is equipped with air intake filter 15；The utility model is a kind of
Freeze-drying unit energy-efficient, applied widely with refrigeration+dehumidification function, in actual use, the utility model
It is such that can be arranged as required to the refrigerant-cycle systems and corresponding air treatment system, operation principle of covering more：Pressure
Contracting machine does work to refrigerant, by refrigerant vapor compression subsequently into condenser heat rejection, is condensed into the high pressure of proper temperature
Liquid then flows through shut-off valve and device for drying and filtering, and is converted into after the throttling pressure regulation of expanded valve and disclosure satisfy that refrigeration needs according to this
The working medium of temperature is wanted, and finally endothermic disintergration is the working medium of low-temp low-pressure in evaporator, and gas-liquid point is carried out through gas-liquid separator
Compressor is returned to from after, completes refrigerant circulation；The utility model is adopted relative to traditional water pump type lyophilization system
Refrigerant closed-loop formula cyclic process, not only structure is simpler, than existing indirect heat exchange technology reduce an evaporator,
Chilled water pump and chilled water pipeline, reduce cost；Can also according to operating mode need flexibly setting refrigerant-cycle systems and
With the quantity of the air treatment system of refrigerant-cycle systems cooperation, easy for installation, floor space smaller, and cold in winter
The phenomenon that being not thorough and causing heat exchanger bursting by freezing, is forgotten to drain or drain in region in use, can thoroughly prevent winter, refrigerant and
Air direct heat transfer, reduces heat transfer temperature difference and loss of refrigeration capacity, improves efficiency, and can effectively reduce the start and stop time of compressor
Number extends compressor service life, and can reduce energy consumption of compressor, reduces operating cost.
Result and the course of work are elaborated so that two-stage shown in FIG. 1 cools down freeze-drying unit as an example below, the freezing
Dryer group includes two sets of refrigerant-cycle systems；First set refrigerant-cycle systems include recycling connection according to this by pipeline
First compressor 1, the first condenser 2, the first shut-off valve 3, the first device for drying and filtering 4, the first expansion valve 5, first evaporator
6 and first gas-liquid separator 7；Second set of refrigerant-cycle systems includes the second compressor for recycling connection according to this by pipeline
8, the second condenser 9, the second shut-off valve 10, the second device for drying and filtering 11, the second expansion valve 12, second level evaporator 13 and
Two gas-liquid separators 14；The first evaporator 6 and second level evaporator 13 are arranged according to this to be passed through from air intake filter 15
Fresh air channel on；The air intake filter 15 includes at least the primary filter and medium effeciency filter integrated, and just
The air side of the inlet side and medium effeciency filter of imitating filter is equipped with differential manometer；One side primary filter and medium effeciency filter
It ensure that the quality of air-treatment, on the other hand, the efficiency of air-treatment detected using differential manometer, when pressure difference is greater than the set value
When, then 15 windage of air intake filter is larger, shows and needs to change filter.
In actual installation, 1 exhaust outlet of the first compressor is connect with 2 import of the first condenser, the first condenser 2 outlet with
First shut-off valve, 3 import connects, and the outlet of the first shut-off valve 3 is connect with 4 import of the first device for drying and filtering, the first device for drying and filtering 4
Outlet is connect with 5 import of the first expansion valve, and the outlet of the first expansion valve 5 is connect with 6 import of first evaporator, first evaporator
6 outlets are connect with 7 import of the first gas-liquid separator, and the outlet of the first gas-liquid separator 7 is connect with 1 air entry of the first compressor.The
Two compressors, 8 exhaust outlet is connect with 9 import of the second condenser, and the outlet of the second condenser 9 is connect with 10 import of the second shut-off valve,
The outlet of second shut-off valve 10 is connect with 11 import of the second device for drying and filtering, the outlet of the second device for drying and filtering 11 and the second expansion valve 12
Import connects, and the outlet of the second expansion valve 12 is connect with 13 import of second level evaporator, the outlet of second level evaporator 13 and the second gas
14 import of liquid/gas separator connects, and the outlet of the second gas-liquid separator 14 is connect with 8 air entry of the second compressor.
When equipment is run, refrigerant is filled in refrigerant-cycle systems.Circuit 1：Low-temperature low-pressure refrigerant steam is through
Entered in the first condenser 2 by discharge duct after one compressor, 1 boil down to high pressure high temperature vapor, with cooling medium by refrigerant
Steam condensation become medium temperature highly pressurised liquid, after flow through the first shut-off valve 3, the first device for drying and filtering 4 after, pass through the first expansion valve 5
After carrying out throttling decrease temperature and pressure, it is converted into the gas-liquid mixture of low-temp low-pressure, then enters first evaporator 6, is flowed absorbing
After crossing the heat in the air of first evaporator 6, refrigerant is evaporated to the refrigerant gas or gas-liquid mixture of low-temp low-pressure,
Enter the first gas-liquid separator 7 through pipeline, carry out gas-liquid separation, it is ensured that the refrigerant vapour being only saturated enters the first compressor
1；In cycles, the cycle of refrigerant-cycle systems is just completed.
Circuit 2：Low-temperature low-pressure refrigerant steam passes through discharge duct after 8 boil down to high pressure high temperature vapor of the second compressor
Into in the second condenser 9, refrigerant vapour condensation is become into medium temperature highly pressurised liquid with cooling medium, after flow through the second shut-off valve
10, after the second device for drying and filtering 11, after carrying out throttling decrease temperature and pressure by the second expansion valve 12, it is converted into the gas-liquid of low-temp low-pressure
Mixture then enters second level evaporator 13, and after absorbing the heat in flowing through 13 air of second level evaporator, refrigerant steams
Hair is the refrigerant gas or gas-liquid mixture of low-temp low-pressure, enters the second gas-liquid separator 14 through pipeline, carries out gas-liquid separation,
Ensure that the refrigerant vapour being only saturated enters the second compressor 8；In cycles, following for refrigerant-cycle systems is just completed
Ring.
Air treatment system：After fresh air passes sequentially through the first effect of air intake filter 15, medium effeciency filter filtering, then through first
Grade evaporator 6 and second level evaporator 13 carry out cool-down dehumidification.
Simultaneously, in order to further increase the convenience of control, and energy consumption is reduced, improves efficiency, the utility model is also
Design is optimized to each functional component, wherein the compressor is rolling rotor-type, vortex, piston type or screw
Compressor；The condenser is shell-tube type, bushing type, board-like or finned cooler；The expansion valve is heating power expansion valve, electricity
Sub- expansion valve or capillary；The evaporator is finned or micropassage type evaporator；15 material of the air intake filter is poly-
Urethane foamed cotton, glass fibre cotton, nylon wire, non-woven fabrics, PP or stainless steel wire mesh；Certainly, the unit can be whole
Body formula, or it is split type, to meet actual installation and requirements of one's work；Certainly, in order to meet the needs actually controlled,
When using more set refrigerant-cycle systems, temperature sensor can be set at the evaporator of every suit refrigerant-cycle systems, it should
Temperature sensor is connected with PLC controller, compressor, condenser and the expansion valve of every suit refrigerant-cycle systems with this
PLC controller is connected, in this way can according to actual needs, and PLC controller controls the working condition of refrigerant-cycle systems,
In continuous freeze-drying, the temperature of evaporator can be reduced successively along airflow direction so that airflow freezing drying is high-efficiency continuous.
The invention also discloses a kind of milling devices, it includes scratch system 17, is structurally characterized in that, it further includes
Above-mentioned freeze-drying unit, the evaporator for being freeze-dried unit is arranged between air intake filter 15 and scratch system 17, and grinds
The air-introduced machine 16 that the air after being freeze-dried evaporator introduces scratch system 17 is additionally provided in powder system 17；Air-treatment system
System：After fresh air passes sequentially through the filtering of air intake filter 15, then through first order evaporator fin 6 and second level finned evaporator 13
Flour mill is inhaled into after cool-down dehumidification, for reducing the temperature of powder thermosetting；In actually controlling, the compressor in unit can
Using full frequency conversion type or frequency conversion+determine frequency combined type；Certain unit can be two-stage cooling, single-stage cooling, three-level or more
Series cools down any；When for single-stage cooling system, it only includes the first compressor for recycling connection according to this by pipeline
1, the first condenser 2, the first shut-off valve 3, the first device for drying and filtering 4, the first expansion valve 5, first evaporator 6 and the first gas-liquid
Separator 7.When the cooling system above for three-level, the freeze-drying unit needs to increase corresponding refrigerant-cycle systems time
The quantity on road.
In actual use, compared with prior art, it has the following advantages：1, cooled down using two-stage, improve compressor
Energy Efficiency Ratio, using frequency-changeable compressor, system comprehensive energy efficiency can be improved 25%~30%, can effectively improve freeze-drying unit and become
Efficient stable is run under operating mode, reduces the fluctuation of leaving air temp；2, region use scope is broad, and leaving air temp adjustable range is wider
Extensively；3, under cold climate conditions, heat exchanger bursting by freezing is prevented；4, easy for installation, floor space is small；5, modularized design, separate unit system
When cooling system failure, complete machine normal operation is not influenced.
Claims (9)
1. a kind of freeze-drying unit for thermosetting powder coating, which is characterized in that it includes several set refrigerant circulations
System and the air treatment system coordinated with the endothermic sections of the refrigerant-cycle systems；
The refrigerant-cycle systems include compressor, condenser, shut-off valve, the dry filter for recycling connection according to this by pipeline
Device, expansion valve, evaporator and gas-liquid separator；The wind direction of coming of the evaporator is equipped with air intake filter (15).
2. being used for the freeze-drying unit of thermosetting powder coating as described in claim 1, which is characterized in that it includes two sets of systems
Refrigerant cycle system；
First set refrigerant-cycle systems include the first compressor (1), the first condenser for recycling connection according to this by pipeline
(2), the first shut-off valve (3), the first device for drying and filtering (4), the first expansion valve (5), first evaporator (6) and the first gas-liquid point
From device (7)；
Second set of refrigerant-cycle systems includes the second compressor (8), the second condenser for recycling connection according to this by pipeline
(9), the second shut-off valve (10), the second device for drying and filtering (11), the second expansion valve (12), second level evaporator (13) and the second gas
Liquid/gas separator (14)；
The first evaporator (6) and second level evaporator (13) are arranged according to this in the fresh air passed through from air intake filter (15)
On channel.
3. being used for the freeze-drying unit of thermosetting powder coating as claimed in claim 2, which is characterized in that the air inlet filtering
Device (15) includes at least the primary filter and medium effeciency filter that integrate, and the inlet side of primary filter and in imitated
The air side of filter is equipped with differential manometer.
4. being used for the freeze-drying unit of thermosetting powder coating as described in any one of claim 1-3, which is characterized in that
The compressor is rolling rotor-type, vortex, piston type or screw compressor.
5. the freeze-drying unit for thermosetting powder coating as described in any one of claim 1-3, feature exist
In the condenser is shell-tube type, bushing type, board-like or finned cooler.
6. the freeze-drying unit for thermosetting powder coating as described in any one of claim 1-3, feature exist
In the expansion valve is heating power expansion valve, electric expansion valve or capillary.
7. the freeze-drying unit for thermosetting powder coating as described in any one of claim 1-3, feature exist
In the evaporator is finned or micropassage type evaporator.
8. the freeze-drying unit for thermosetting powder coating as described in any one of claim 1-3, feature exist
In air intake filter (15) material is polyurethane foam cotton, glass fibre cotton, nylon wire, non-woven fabrics, PP or stainless steel gold
Belong to net.
9. a kind of milling device, it includes scratch system (17), which is characterized in that it further includes any one in claim 1-8
Freeze-drying unit described in, be freeze-dried the evaporator setting of unit air intake filter (15) and scratch system (17) it
Between, and the air-introduced machine that the air after being freeze-dried evaporator introduces scratch system (17) is additionally provided in scratch system (17)
(16)。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820071368.0U CN208012242U (en) | 2018-01-17 | 2018-01-17 | Freeze-drying unit and milling device for thermosetting powder coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820071368.0U CN208012242U (en) | 2018-01-17 | 2018-01-17 | Freeze-drying unit and milling device for thermosetting powder coating |
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| Publication Number | Publication Date |
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| CN208012242U true CN208012242U (en) | 2018-10-26 |
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ID=63882947
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| CN201820071368.0U Active CN208012242U (en) | 2018-01-17 | 2018-01-17 | Freeze-drying unit and milling device for thermosetting powder coating |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108224907A (en) * | 2018-01-17 | 2018-06-29 | 广东欧亚制冷设备制造有限公司 | For the freeze-drying unit and milling device of thermosetting powder coating |
-
2018
- 2018-01-17 CN CN201820071368.0U patent/CN208012242U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108224907A (en) * | 2018-01-17 | 2018-06-29 | 广东欧亚制冷设备制造有限公司 | For the freeze-drying unit and milling device of thermosetting powder coating |
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