CN206683319U - A kind of low area overheat steam heat pump drying device - Google Patents
A kind of low area overheat steam heat pump drying device Download PDFInfo
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- CN206683319U CN206683319U CN201720405532.2U CN201720405532U CN206683319U CN 206683319 U CN206683319 U CN 206683319U CN 201720405532 U CN201720405532 U CN 201720405532U CN 206683319 U CN206683319 U CN 206683319U
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- heat pump
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Abstract
The utility model discloses a kind of low area overheat steam heat pump drying device, including casing, pumped vacuum systems and water system, the box house is divided into heated-air drying space by the first thermal-insulation baffle plate and water vapor condensation separates out space, first thermal-insulation baffle plate is provided with numerical control air door and air inlet fan, the water vapor condensation separates out space and is provided with evaporator and heat pump, and the heated-air drying space is provided with condenser, the second thermal-insulation baffle plate, return air fan and the shelf for placing material.Low area overheat steam heat pump drying device of the present utility model, using closed cycle, heat loss can be reduced to the full extent, reduces energy consumption；Close to vacuum environment, while beneficial to moisture evaporation containing wet stock, ensure the safe operation of source pump；Using drying with superheated steam, speed is fast, safe, quality of finished product good.
Description
Technical field
It the utility model is related to drying plant technical field, and in particular to one kind utilizes vacuum technique, drying with superheated steam
With enclosed circulation heat pump drying device of the air source heat pump under environment under low pressure.
Background technology
Dry the technology for referring to and moisture or other hygroscopic waters being removed from wet stock, be widely used in chemical industry, food, light industry,
Each industrial circles such as weaving, coal, agriculture and forestry product processing and building materials.Its general principle is, at a certain temperature, any aqueous
Wet stock has certain vapour pressure, and when this vapour pressure is more than the water vapor partial pressure in ambient gas, moisture will vaporize.Vaporization institute
Calorific requirement, or provided from surrounding hot gas, or by other thermals source by radiation, heat transfer.Understand to influence to do by principles above
The objective condition of dry efficiency has two：One is the water vapor partial pressure in surrounding air, and one is heat.According to the supplier of heat
Formula is different, there is a variety of dry types, such as convective drying, conductive drying, radiant drying, dielectric heating drying etc..Convective drying exists
Most widely used in production, it includes pneumatic conveying drying, spray drying, fluidized drying, revolving drum drying and carriage-type drying etc..Conduction
Drying includes roller drying, freeze-drying, vacuum rake type drying etc..Radiant drying and dielectric heating drying because cost is higher,
Industrially using less.Above drying means or drying equipment all suffer from a contradiction, i.e. drying efficiency and drying cost is past
It is past directly proportional, also increase energy consumption cost while increasing heat supply.Therefore, existing highly effective drying function is developed, again
Can be the important directions of current drying industry technology development with the drying device of energy-conservation of consumption reduction.
Utility model content
The purpose of this utility model is to provide a kind of low area overheat steam heat pump drying device, makes full use of vacuum skill
The enclosed circulation of art, drying with superheated steam and air source heat pump under environment under low pressure is dried, and realizes the section of dry materials process
Can emission reduction and safe and efficient.
To achieve the above object, the technical solution of the utility model is：
A kind of low area overheat steam heat pump drying device, including closed casing, the pumped vacuum systems that is connected with casing
And water system, wherein：
The box house is divided into heated-air drying space by the first thermal-insulation baffle plate and water vapor condensation separates out space, institute
State the first thermal-insulation baffle plate and be provided with numerical control air door and air inlet fan, the water vapor condensation separates out space and is provided with evaporator and heat
Pump, the heated-air drying space is provided with condenser, the second thermal-insulation baffle plate, return air fan and the shelf for placing material, described
Evaporator, heat pump and condenser form closed-loop path by pipeline；
The shelf, return air fan, condenser form first circulation air channel, the shelf, return air fan, numerical control air door,
Evaporator, air inlet fan, condenser form second circulation air channel.
The pumped vacuum systems includes setting the vavuum pump of outside the enclosure.Original air in casing is taken out by vavuum pump
Walk, so as to which oxidation and combustion reaction can not be produced, avoid box house from catching fire or explode.
The water system includes the water intaking valve and water filter being arranged on water supply line.Water enters in vacuum state
Flass can occur after casing, become vapor, the impurity in water is may filter that by water filter, avoid pollution from having sterilizing will
The raw-food material and pharmaceutical raw material asked.
Because drying device of the present utility model does not set exhaust outlet, dry overall process and keep sealing, the vapor in casing
It will not be emitted by exhaust outlet, but the condensation in evaporator, therefore to keep long-play, the evaporator
It is additionally provided with the storage tank for storing condensed water.
The low area overheat steam heat pump drying device also includes automatic monitoring unit, the automatic monitoring list
Member includes temperature sensor, humidity sensor, pressure gauge, anemobiagraph and the master controller being located on casing, the master control
Device is electrically connected vavuum pump, water intaking valve, return air fan, numerical control air door, air inlet fan and heat pump.The automatic monitoring list
Member, it can monitor on-line and record the change of temperature in drying course, humidity, wind speed and pressure, grasp drying situation in real time.
At work, the material that need to be dried is put into shelf, closed box to drying device of the present utility model.Open vacuum
Pump, extract the air in casing out, when box house pressure is close to zero, open water intaking valve, water enters after water filter
Casing.Because being now nearly vacuum state in casing, water occurs flass after entering casing, becomes vapor immediately.Work as pressure
When power meter reading is some value (for example 0.01MPa can be set as according to material characteristic), water intaking valve is closed, opens return air wind
Fan, air inlet fan and numerical control air door, make vapor in casing internal circulation flow.Then heat pump is started, under the work of heat pump, heat
The vapor of wind dry place is gradually thermally formed superheated vapor by condenser, and material to be dried now absorbs the heat of superheated vapor
Amount starts to evaporate the moisture of inside, forms moist steam, and under the drive of return air fan, a part is entered by numerical control air door
Water vapor condensation separates out space, and then condensed device is sent into dried material to another part after heating again.Enter water vapor condensation
The moist steam in space is separated out, by the condensation of evaporator, condensed water enters storage tank, and the vapor after cooling then passes through
Air inlet fan enters heated-air drying space.First thermal-insulation baffle plate by heated-air drying space and water vapor condensation separate out space every
Open, make the temperature and humidity of two spaces different, pass through numerical control air door regulating box internal temperature and the balance of pressure.
Compared with prior art, its advantage is the utility model：
Drying device of the present utility model is taken away original air in casing by vavuum pump, adds a small amount of water, shape
Into simple vapor environment under low pressure, whole device does not set exhaust outlet, dries overall process and keeps sealing, the vapor in casing without
Method is discharged, and forms closed cycle, can reduce heat loss to the full extent, reduces energy consumption, and environment under low pressure is not only improved in material
The evaporation of vapor, again source pump can be run with high temperature safe, drying with superheated steam speed is fast, safe, finished product
Quality is good.
Brief description of the drawings
Fig. 1 is the structure chart of the utility model low area overheat steam heat pump drying device；
Description of reference numerals：1- return air fans；2- pressure gauges；3- anemobiagraphs；4- numerical control air doors；5- evaporators；6- water storages
Case；7- heat pumps；The thermal-insulation baffle plates of 8- first；9- air inlet fans；10- condensers；11- shelves；12- casings；13- vavuum pumps；14- is filtered
Hydrophone；15- water intaking valves；The thermal-insulation baffle plates of 16- second.
Embodiment
Content of the present utility model is described in further details with reference to the accompanying drawings and detailed description.
Embodiment：
As shown in figure 1, a kind of low area overheat steam heat pump drying device, including casing 12, casing 12 are connected with vavuum pump
13rd, pressure gauge 2, anemobiagraph 3 and filling pipe, water intaking valve 15 and water filter 14 are provided with filling pipe.
The heated-air drying space and the right on the left side are divided into inside casing 12 by the first thermal-insulation baffle plate 8 for arranging vertically
Water vapor condensation separates out space.The top of first thermal-insulation baffle plate 8 is provided with numerical control air door 4, and middle part is provided with air inlet fan 9.Vapor is cold
Condensation goes out space and is provided with evaporator 5 and heat pump 7, and the lower section of evaporator 5 is provided with storage tank 6.Heated-air drying space is provided with condenser
10th, the second thermal-insulation baffle plate 16, return air fan 1 and the shelf 11 for placing material.Evaporator 5, heat pump 7 and condenser 10 pass through
Pipeline forms closed-loop path.
Wherein, evaporator 5, air inlet fan 9 and condenser 10 are turned left from the right side and be arranged in parallel vertically successively, are easy to through evaporator
Vapor after 5 processing is directly blown into condenser 10 by air inlet fan 9.Second thermal-insulation baffle plate 16 is horizontally disposed, and it is right
End and the upper end of condenser 10 connect, and form L-type dividing wall, heated-air drying space are divided into two parts, i.e., positioned at second
The lower section of thermal-insulation baffle plate 16, the dry materials region of the left of condenser 10, shelf 11 are placed in this region.And protected positioned at second
The top of temperature dummy plate 16, the L-type passage of the right of condenser 10 are then circulation air path, and return air fan 1 is arranged on the second thermal-insulation baffle plate 16
In the air channel of top, for the vapor in dry materials region to be drawn into circulation air path.
Dotted line and arrow in Fig. 1 show two circulation air paths in casing 12：First circulation air channel is located at hot air drying
In dry space, air-flow flows out from the left upper end of shelf 11, by return air fan 1, is downwardly towards condenser 10, finally passes through to the left
Condenser 10 is returned between shelf 11.Second circulation air channel penetrates heated-air drying space and water vapor condensation separates out space, air-flow
Flowed out from the left upper end of shelf 11, by return air fan 1, flow to numerical control air door 10 to the right, then in turn through evaporator 5, enter
Wind fan 9, condenser 10 are returned between shelf 11.When the moisture of dried material is fewer, by adjusting numerical control
The aperture of air door 4, reduction are even switched off second circulation air channel, can further reduce energy consumption.
Wherein, low area overheat steam heat pump drying device of the present utility model, in addition to master controller, be located in casing 12
Temperature sensor and humidity sensor and master controller (being not shown in figure).Wherein, master controller is electrically connected vacuum
Pump 13, water intaking valve 15, return air fan 1, numerical control air door 4, air inlet fan 9 and heat pump 7.Master controller is surveyed according to temperature sensor
Temperature value, the air speed value that measures of the pressure value that measures of the humidity sensor humidity value, the pressure gauge 2 that measure, anemobiagraph 3 and
Preset value, work order is sent to the said equipment, it is set by those skilled in the art according to existing sensing technology and above-mentioned work(
It can describe to can be achieved, therefore no longer be described in detail herein.
By automatic monitoring unit, it can monitor on-line and record temperature in drying course, humidity, wind speed and pressure
Change, drying situation is grasped in real time, and by setting certain temperature, humidity value adjust automatically drying program, optimization drying work
Skill, reduce labour's input.
Drying device of the present utility model is put into shelf 11, closed box 12 at work, by the material that need to be dried.Open
Vavuum pump 13, extract the air in casing 12 out, when the internal pressure of casing 12 is close to zero, open water intaking valve 15, water passes through
Enter casing 12 after water filter 14.Because being now nearly vacuum state in casing 12, water flashes immediately after entering casing 12
Phenomenon, become vapor.When the reading of pressure gauge 2 is some value (for example 0.01MPa can be set as according to material characteristic),
Water intaking valve 15 is closed, return air fan 1, air inlet fan 9 and numerical control air door 4 is opened, makes vapor in the internal circulation flow of casing 12.So
Start heat pump 7 afterwards, under the work of heat pump 7, the vapor in heated-air drying space is gradually thermally formed overheat by condenser 10 and steamed
Gas, the heat that material to be dried absorbs superheated vapor start to evaporate the moisture of inside, moist steam are formed, in return air fan 1
Under drive, a part of moist steam enters water vapor condensation by numerical control air door 4 and separates out space, and another part moist steam is then again
Condensed device 10 is sent into dry materials region after heating.The moist steam that water vapor condensation separates out space is entered, by evaporator 5
Condensation condensed water, be stored in storage tank, the vapor after cooling then by air inlet fan 9 enter heated-air drying sky
Between, dry materials region is sent into after condensed device 10 heats again, so as to by the water transport in material to be dried to storage tank 6
In.
Low area overheat steam heat pump drying device of the present utility model, there is obvious advantage：
1st, closed cycle can reduce heat loss to the full extent, reduce energy consumption：The drying device of the present utility model not row of setting
Gas port, dry overall process and keep sealing, the moisture of material to be dried is not discharged with vapor from exhaust outlet, but passes through evaporator
5 condensations, storage tank 6 is stored in, therefore, heat will not follow vapor to be discharged to outside casing 12, cause damage.
2nd, environment under low pressure make it that water vapor partial pressure is very low, is advantageous to the evaporation of vapor in material：At a certain temperature, it is any
Aqueous wet stock has certain vapour pressure, and when this vapour pressure is more than the water vapor partial pressure in ambient gas, moisture will vaporize,
This pressure differential is exactly the motive force of the drying process containing wet stock, and pressure differential is bigger, and water evaporation rate is faster, therefore, is kept
Environment under low pressure is the important channel for improving evaporation efficiency.Drying device of the present utility model will be former in casing 12 by vavuum pump 13
Some air are taken away, add a small amount of water, form simple vapor, both maintain environment under low pressure, are advantageous to contain in wet stock
Moisture evaporation, obtain convection heat transfer' heat-transfer by convection medium again, turn into start drying process necessary condition.
3rd, drying with superheated steam speed is fast, safe, quality of finished product good：The specific heat and ratio of heat transfer coefficient of superheated vapor are empty
Gas is big, while resistance to mass tranfer of the superheated vapor in dried medium can be neglected, therefore the migration velocity of moisture is fast, arid cycle
Can substantially it shorten.Drying with superheated steam exists without air, does not aoxidize and combustion reaction, avoids what hothouse caught fire or exploded
It is dangerous.The temperature of drying with superheated steam material is the boiling temperature of water under operating condition, has the food original for sterilizing and requiring drying
Material and pharmaceutical raw material simultaneously, can eliminating bacteria and other harmful microorganisms.Drying device of the present utility model, heat pump 7, evaporator
5 and condenser 10 all in the casing 12 of closing, so the work(that heat pump 7 is done has been completely converted into the heat in casing 12, casing
Steam temperature meeting more and more higher in 12, consumes the less energy, with regard to that can reach superheat state.
4th, environment under low pressure causes heat pump to be run with high temperature safe：Conventional air source heat pump is due to being operated in normal atmosphere
Pressure, when heating high-temperature medium, condensation temperature is also very high, and condensing pressure is also larger, and larger condensing pressure causes heat pump machine
Group each several part is significantly improved by the risk destroyed.Heat pump 7 of the present utility model works in a low pressure environment, water corresponding to low pressure
Saturated with vapor evaporating temperature is relatively low, therefore evaporating temperature is relatively low, in the case where the power output of heat pump 7 is constant, working medium it is cold
Solidifying temperature is not also high, therefore condensing pressure declines, and the security of source pump is ensured.
5th, numerical control air door can adjust dry environment parameter：First thermal-insulation baffle plate 8 is cold by heated-air drying space and vapor
Condensation goes out space and separated, and makes the temperature and humidity of two spaces different.Numerical control air door 4 is opened more greatly, will have more juicy to lead to
The condensation of pervaporation device 5, the air pressure in heated-air drying space, temperature, humidity can reduce, and water vapor condensation separates out the air pressure in space
It can be raised with temperature, rate of drying can be quicker, but the power consumption of heat pump 7 also can be more.Numerical control air door 4 is opened a little less, condensation
Water produces can be a little less, and the air pressure in heated-air drying space, temperature, humidity can be raised accordingly.Therefore, according to the drying of different material
Technological requirement, by adjusting numerical control air door 4, the regulation to ambient parameter in casing 12 is can be achieved with, it is simple in construction effective.
For above-described embodiment simply to illustrate that technical concepts and features of the present utility model, the purpose is to be to allow this area
Interior those of ordinary skill can understand content of the present utility model and implement according to this, can not be limited with this of the present utility model
Protection domain.The equivalent change or modification that every essence according to the utility model content is made, should all cover in this reality
With in new protection domain.
Claims (5)
1. a kind of low area overheat steam heat pump drying device, it is characterised in that what is be connected including closed casing, with casing takes out
Vacuum system and water system, wherein：
The box house is divided into heated-air drying space and water vapor condensation by the first thermal-insulation baffle plate and separates out space, and described the
One thermal-insulation baffle plate is provided with numerical control air door and air inlet fan, and the water vapor condensation separates out space and is provided with evaporator and heat pump, institute
State heated-air drying space and be provided with condenser, the second thermal-insulation baffle plate, return air fan and the shelf for placing material, the evaporation
Device, heat pump and condenser form closed-loop path by pipeline；
The shelf, return air fan, condenser form first circulation air channel, the shelf, return air fan, numerical control air door, evaporation
Device, air inlet fan, condenser form second circulation air channel.
2. low area overheat steam heat pump drying device according to claim 1, it is characterised in that the pumped vacuum systems bag
Include the vavuum pump that outside the enclosure is set.
3. low area overheat steam heat pump drying device according to claim 1, it is characterised in that the water system includes
The water intaking valve and water filter being arranged on water supply line.
4. according to any described low area overheat steam heat pump drying devices of claim 1-3, it is characterised in that the evaporator
It is additionally provided with the storage tank for storing condensed water.
5. low area overheat steam heat pump drying device according to claim 4, it is characterised in that also including automatic monitoring
Unit processed, the automatic monitoring unit include temperature sensor, humidity sensor, pressure gauge, the wind speed being located on casing
Instrument and master controller, the master controller are electrically connected vavuum pump, water intaking valve, return air fan, numerical control air door, air inlet fan
And heat pump.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720405532.2U CN206683319U (en) | 2017-04-17 | 2017-04-17 | A kind of low area overheat steam heat pump drying device |
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| CN201720405532.2U CN206683319U (en) | 2017-04-17 | 2017-04-17 | A kind of low area overheat steam heat pump drying device |
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| CN206683319U true CN206683319U (en) | 2017-11-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106949713A (en) * | 2017-04-17 | 2017-07-14 | 中国科学院广州能源研究所 | A kind of low area overheat steam heat pump drying device |
-
2017
- 2017-04-17 CN CN201720405532.2U patent/CN206683319U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106949713A (en) * | 2017-04-17 | 2017-07-14 | 中国科学院广州能源研究所 | A kind of low area overheat steam heat pump drying device |
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