KR101658217B1 - Heat recovery type multi-drying system using micro wave and hot air - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a composite drying system using hot air and microwaves (MW), and more particularly, to a drying system in which hot air and microwaves are combined, Recovering type composite drying system using hot air and microwaves capable of improving the drying state of an object to be dried to a very good level by allowing the material to be secondarily dried using reheated hot air which is recovered and reheated.
For this purpose, in consideration of the advantages of drying by hot air and the advantage of drying by microwave, the present invention is characterized in that the drying of the drying object is performed by a method in which hot air and microwave are combined, then hot air used for drying is recovered, The present invention provides an array-type complex drying system using hot air and microwaves capable of largely improving the drying quality of an object to be dried by allowing the object to be dried secondarily using hot air.

Description

[0001] Heat recovery type multi-drying system using microwave and hot air [

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a composite drying system using hot air and microwaves (MW), and more particularly, to a drying system in which hot air and microwaves are combined, The present invention relates to a composite drying system using hot air and microwaves, which can improve the drying state of an object to be dried to a very good level by allowing the material to be secondarily dried using reheated hot air.

Due to the recent rapid growth of IT, NT, ET, and BT industries, high performance, complexity and eco-friendliness of drying technology for high value-added new material products are required.

However, in particular, the drying of fine particle materials used in electronic materials, ceramics, semiconductors, pharmaceuticals and fine chemical industries is mainly carried out by rotary dryers, air driers and fluidized bed dryers, and most of these dryers use hot air drying have.

As described above, a method of using hot air to dry various articles is mainly used, and a drying method using hot air is disclosed in Korean Registered Patent Publication No. 10-1395605 (May 2014.05.09).

In the drying method using hot air, hot air is directly or indirectly injected into the dryer to dry the drying object. Since hot air comes into contact with the outer surface of the object to be dried, drying starts from the outside of the object to be dried, There is a problem that the drying quality of the laundry is poor and the energy loss is large because hot air is discharged to the air as it is.

Particularly, since a heavy material (for example, Poly Quta) as a drying material is a heat-sensitive raw material, there is a disadvantage that it is discolored when dried by hot air, and the functional sugar, which is a drying substance, There is a problem in that the functional salt, which is a dried product, has a low productivity because the drying time is long due to drying by hot air and the production amount is small.

A drying method using a microwave (MW) capable of solving the problem of the hot air drying method is disclosed in Korean Patent Registration No. 10-1252664 (2013.04.03) and the like.

Unlike the hot air drying method in which the heat for heating the object to be dried reaches from the outside to the inside by the heat transfer and the steam is blown, the drying method using the microwave is a method in which heat is transferred from the inside to blow water vapor. The drying effect can be obtained, and the energy saving effect is improved accordingly.

However, since the drying method using microwaves is mainly used for microwave oven for heating foods and small-sized drying, there is a difficulty in applying to a large-capacity drying of the laundry, and since the microwave generates a high temperature, the laundry may burn, There is a problem that this is damaged.

In particular, since the chitosan salt, which is a functional salt used as a blood pressure lowering agent, is in a liquid state as a slush, when it is dried, steam inside the salt must be pushed out and heated from the outside and dried. It is required to develop drying techniques different from those used.

Korean Registered Patent Publication No. 10-1395605 (2014.05.09) Korean Registered Patent Publication No. 10-1252664 (Apr. 03, 2013)

DISCLOSURE OF THE INVENTION The present invention has been made in order to solve the above problems of the prior art, and it is an object of the present invention to provide a method and apparatus for drying an object to be dried in a combined mode of hot air and microwave, The present invention relates to a composite drying system using a hot air and a microwave, which is capable of significantly improving the drying quality of a laundry by allowing the laundry to be secondarily dried again using reheated hot air after reheating. have.

According to an aspect of the present invention, there is provided a drying apparatus, including: a drying chamber having a predetermined volume, in which a drying object inlet is formed at an upper end of a drying object and a drying agent discharge port is formed at a lower end of the drying body; A hot air discharge pipe communicably connected to the upper end of the other side of the drying chamber so as to discharge the dried hot air to the drying object in the drying chamber; A hot air generator for supplying dry hot air to the drying object placed in the drying chamber through a hot air supply pipe connected to one side of the drying chamber, A microwave unit for irradiating microwave to the microwave unit, A second step of secondarily drying the object to be dried using hot air supplied from a hot air generating device and reheating hot air supplied from a hot air generating and heating means disposed adjacent to the drying object discharge port of the drying chamber, And a drying and collecting type complex drying system using hot air and microwaves as a hot air recovery heating means for recovering hot air after drying in the drying chamber to reheat and then supplying reheating hot air to a secondary drying means, to provide.

In the present invention, the microwave unit may include: a microwave generator for generating a microwave; And a plurality of magnetrons connected to the microwave generator and closely assembled to the upper surface of the drying chamber and irradiating the microwave generated in the microwave generator toward the drying object in the drying chamber.

In the present invention, the cooling means may include: a heat exchange block coupled to the upper surface of the microwave generator so as to be heat-exchangeable; And a cooling water circulation pipe circulatingly disposed in the heat exchange block, through which the cooling water from the cooling water supply source flows in a heat exchangeable manner.

Preferably, a first conveyor for conveying the dried first dried material to a desired position is disposed below the dry material outlet of the drying chamber.

In the present invention, the secondary drying means is provided with a reheating hot air supply port for supplying hot air from the hot air generator and reheated hot air from the hot air recovery heating means to the lower end thereof, A second drying chamber having a structure in which a drying-outflow tube through which an object to be dried is dried is disposed at an upper end of the drying chamber and is disposed adjacent to a drying-object discharge port of the drying chamber; The upper end portion is connected to the hot air discharge pipe connected to the drying chamber in a communicable manner and the lower end portion is provided with a discharge hole for finally discharging the dried material to be finally dried so that one side can communicate with the dry material discharge pipe of the secondary drying chamber And a final discharge pipe connected to the discharge pipe.

Preferably, a second conveyor for conveying the secondarily dried product to a desired place is disposed at the outlet of the final product discharge pipe.

A mixing unit for mixing the hot air flowing through the hot air discharge pipe and the hot air discharged from the final discharge pipe of the to-be-dried product is installed at the position of the hot air discharge pipe to which the upper end of the dry end product discharge pipe is connected.

In the present invention, the hot air recovery and heating means includes a compressor for compressing and supplying the refrigerant, an evaporator for evaporating the refrigerant, and a condenser for condensing the evaporated refrigerant and releasing heat around the evaporator, A heat pump unit; And a reheated hot air supply pipe extending from the outlet of the hot air generator and the outlet of the heat pump unit and connected to the reheated hot air supply port of the secondary drying chamber of the secondary drying means.

Through the above-mentioned means for solving the problems, the present invention provides the following effects.

First, by allowing the drying object to be dried in a combined mode of hot air and microwave, the drying quality of the drying object can be greatly improved as compared with the hot air or microwave alone drying method.

Second, by allowing the drying of the drying object in a combined mode of hot air and microwaves, the drying time of the drying object can be shortened, and the drying quality of the drying object can be greatly improved without burning or damaging the drying object .

Third, the drying of the laundry can be greatly improved by allowing the laundry to be secondarily dried using the reheated hot air after the drying of the laundry is firstly performed, the hot air used for drying is recovered and reheated.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing an arrangement recovery type complex drying system using hot air and microwaves according to the present invention; Fig.
BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to a composite drying system,
3 is a schematic view showing a composite drying principle using hot air and microwaves according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic view showing an arrangement recovery type complex drying system using hot wind and microwaves according to the present invention, FIG. 2 is a diagram showing a detailed structure of an arrangement recovery type complex drying system using hot wind and microwaves according to the present invention to be.

The object of the present invention is to provide a method of drying a dried object by firstly drying the object in a manner that combines the advantages of hot air to start drying from the outer surface of the object to be dried and the merit of microwaves in which heat is transferred to the inside of the object, The drying air can be secondarily dried again by using the reheated hot air after the hot air used in the drying step is reheated, thereby significantly improving the drying quality of the drying object.

To this end, a drying chamber 10 having a structure in which an object to be dried 11 is formed at an upper end portion and an object to be dried 12 is formed at a lower end portion of the other side and a constant volume capable of accommodating both hot air and microwaves is provided.

A hot air supply pipe 13 for supplying hot air into the drying chamber 10 is communicably connected to one side of the drying chamber 10, The hot air discharge pipe (14) is communicably connected to discharge the dried hot air from the dried product.

In the drying chamber 10, an agitator 15 for agitating the object to be dried is rotatably installed. Preferably, the agitator 15 is configured such that the object to be dried inserted into the object 11 is dried, Is used as a screw type stirrer so that it can be transferred to the discharge port (12).

The hot air supply device 14 connected to one side of the drying chamber 10 is connected to a hot air generating device 16 for supplying hot air to the drying device 10.

On the upper side of the drying chamber 10, there is disposed a microwave unit 20 for irradiating the drying object 10 with the microwave to dry the object to be dried.

More specifically, the microwave unit 20 includes a microwave generator 21 disposed to be spaced apart from the upper surface of the drying chamber 10 to generate microwaves, a microwave generator 21 connected to the microwave generator 21, And a plurality of magnetrons (22) tightly assembled on the upper surface and irradiating the microwave generated in the microwave generator (21) toward the drying object in the drying chamber (10).

At this time, since the microwave generator 21 generates heat during operation of the microwave unit 20, a cooling unit 30 for preventing overheating is required.

Accordingly, a separate cooling means 30 is assembled to the microwave generator 21 of the microwave unit 20. [

More specifically, the cooling means 30 includes a heat exchange block 31 which is connected to the upper surface of the microwave generator 21 so as to be heat-exchangeable, and a cooling water circulating in the heat exchange block 31, And a cooling water circulation pipe 32 that allows heat exchange.

Therefore, even if heat is generated during the operation of the microwave generator 21, if the cooling water from the cooling water supply source is circulated along the cooling water circulation pipe 32, the cooling water circulating through the cooling water circulation pipe 32 can cool the heat exchange block 31 And at the same time, the microwave generator 21 connected to the cooled heat exchange block 31 is cooled, whereby the overheating of the microwave generator 21 can be prevented.

On the other hand, a first conveyor 17 for conveying the dried first dried material to the second drying means for drying the second dried material is disposed below the dried material discharge port 12 of the drying chamber 10.

At this time, in the vicinity of the dry-material discharge port 12 of the drying chamber 10, the primary drying material conveyed from the first conveyor 17 is accommodated, and the secondary drying is performed to re- Means 40 are disposed.

The secondary drying means 40 is for secondary drying the laundry using the hot air supplied from the hot air generator 16 and the reheated hot air supplied from the hot air recovery heating means 50, And a final discharge pipe 46 through which the secondarily dried material is finally discharged.

The secondary drying chamber 44 is provided with a reheating hot air supply port 41 through which hot air from the hot air generator 16 and reheated hot air from the hot air recovery heating means 50 to be described later are supplied to the lower end, A drying object supply port 42 is formed in the drying chamber 10 in the drying chamber 10 and a drying object discharge pipe 43 through which the drying object is dried at the upper end is connected.

In addition, the final discharge pipe (46) of the material to be dried is in the form of a tube communicating with the upper and lower ends, and the upper end is communicably connected to the hot air discharge pipe (14) connected to the drying chamber (10) And an upper end portion is communicably connected to the drying object discharge pipe 43 of the secondary drying chamber 44. [

The mixing unit 48 mixes hot air flowing through the hot air discharge pipe 14 and hot air discharged from the final product discharge pipe 46 at the position of the hot air discharge pipe 14 to which the upper end of the dry final discharge pipe 46 is connected. The reheating efficiency of the hot air can be increased by mixing the reheated hot air after the second drying of the hot air discharged through the hot air discharge pipe 14 of the drying chamber 10 again.

At this time, the secondary drying means 40 receives the reheated hot air supplied from the hot air recovery heating means 50 in addition to the hot air supplied from the hot air generating device 16, and dries the primary dried material to the secondary, A hot air recovery heating means 50 for recovering and reheating hot air between the hot air discharge pipe 14 of the drying chamber 10 and the reheated hot air supply port 41 of the secondary drying chamber 44 is disposed.

The hot air recovery and heating means 50 includes a heat pump unit 54 for reheating hot air discharged through the hot air discharge pipe 14 of the drying chamber 10 and an outlet of the hot air generator 16 And a reheated hot air supply pipe 55 connected to the reheated hot air supply port 41 of the secondary drying chamber 44 of the secondary drying means.

Particularly, the heat pump unit 54 constituting the hot air recovery heating means 50 includes a compressor 51 for compressing and supplying a refrigerant, an evaporator 52 for evaporating the refrigerant, a condenser 51 for condensing the evaporated refrigerant, And a condenser 53 for discharging hot air from the hot air discharge pipe 14 to reheat the hot air.

That is, the heat pump unit 54 repeats a refrigeration cycle in which the refrigerant evaporates in the evaporator 52 to take heat from the surroundings to become a gas, and again liquefies heat by releasing heat to the surroundings by the condenser 53, And is a kind of heat pump that reheats hot air by the heat emitted from the condenser 53.

On the other hand, a second conveyor 47 for conveying the secondarily dried material to a desired place is disposed at the outlet of the object final product discharge pipe 46, that is, below the final product discharge hole 45.

Hereinafter, a drying operation flow of the batch recovery type complex drying system using hot air and microwaves constructed as described above will be described.

First, the drying object is introduced into the drying chamber 10 through the drying object inlet 11 of the drying chamber 10.

At the same time, the hot air generator 16 operates to generate hot air. The generated hot air is introduced into the drying chamber 10 through the hot air supply pipe 14, and dried by the hot air against the drying object.

When the microwave unit 20 is activated to generate microwaves, the generated microwaves are irradiated into the drying chamber 10 through the plurality of magnetrons 22 mounted on the upper surface of the drying chamber 10, Drying by microwave is carried out.

3, hot air drying in which the outer surface of the object to be dried is dried by the hot air supplied to the drying chamber 10 and hot air drying in which the inside of the object to be dried is dried by the microwave irradiated into the drying chamber 10 By simultaneously performing drying, the drying quality of the dried object can be greatly improved.

On the other hand, since the laundry to be dried simultaneously by hot air and microwave is stirred and transferred by the rotation of the agitator 15 mounted in the drying chamber 10, the laundry can be dried evenly, And is then directed toward the outlet 12.

Finally, the dried material dried in the drying chamber 10 is discharged through the drying-material discharge port 12, and then conveyed along the first conveyor 17 to the secondary drying means, which is the next process.

At this time, the hot air, which has been dried in the drying chamber 10, is discharged through the hot air discharge pipe 14 and then transferred to the heat pump unit 54 to be reheated.

That is, when the refrigerant evaporates in the evaporator 52 of the heat pump unit 54 to absorb heat from the surroundings and becomes a gas, when the condenser 53 discharges heat to the surroundings again, the hot air is reheated.

The reheated hot air enters the reheated hot air supply port 41 of the secondary drying chamber 44 through the reheating hot air supply pipe 55. Since the secondary drying may not be sufficient with the reheated hot air only at this time, Is also supplied to the reheated hot air supply port 41 of the secondary drying chamber 44 through the reheated hot air supply pipe 55. [

At the same time, the primary drying dried laundry is introduced through the drying laundry inlet 42 of the secondary drying chamber 44.

Therefore, secondary drying of the primary drying product by the hot air introduced into the secondary drying chamber 44 and reheating hot air is performed, and hot air and reheated hot air flow upward from the lower side of the secondary drying chamber 44 The secondarily dried object to be dried by the flow force of the hot air is transferred to the dry final discharge pipe 46 through the dry object discharge pipe 43 and then the dry final discharge hole 45 of the dry final discharge pipe 46 The second conveyor 47 is finally discharged.

At this time, the reheated hot air after the second drying is introduced into the mixing unit 48 through the upper side of the final product discharge pipe 46 to be reused.

As described above, according to the present invention, it is possible to dry the drying object in a manner that the hot air and the microwave are combined with each other, so that the drying time of the drying object can be shortened and the drying quality It is possible to further improve the drying quality of the laundry, and furthermore, after the drying of the laundry is firstly performed, the hot air used for drying is recovered and then the laundry is secondarily dried using the reheated hot air reheated, Can be further improved.

10: Drying chamber 11: Depositing inlet
12: Deposited material discharge port 13: Hot air supply pipe
14: Hot air discharge pipe 15: Stirrer
16: hot air generating device 17: first conveyor
20: Microwave unit 21: Microwave generator
22: Magnetron 30: Cooling means
31: heat exchange block 32: cooling water circulation pipe
40: Secondary drying means 41: Reheated hot air supply port
42: Depositing material supply port 43: Deposition material discharge pipe
44: Secondary drying chamber 45: Deposited final discharge hole
46: Deposited final discharge pipe 47: Second conveyor
48: Mixing unit 50: Hot air recovery heating means
51: compressor 52: evaporator
53: condenser 54: heat pump unit
55: reheat heat blowing pipe

Claims (8)

delete delete delete delete A drying chamber 10 having a fixed volume inlet 11 formed at one upper end and a drying outlet 12 formed at the other lower end of the drying chamber 10 and a drying chamber 10 communicably connected to one side of the drying chamber 10, A hot air supply pipe 13 for supplying hot air into the drying chamber 10 and a hot air supply line 13 connected to the other upper end portion of the drying chamber 10 so as to discharge the dried hot air to the drying object in the drying chamber 10, An agitator 15 which is rotatably mounted in the drying chamber 10 to agitate the material to be dried and a hot air supply pipe 14 connected to one side of the drying chamber 10, A microwave unit for irradiating microwave to the object to be dried placed in the drying chamber 10 and disposed on the upper surface of the drying chamber 10 for supplying hot air to the object to be dried, (20) A cooling unit 30 which is closely attached to the cooling unit 20 so as to cool the microwave unit 20 and a cooling unit 30 which is disposed adjacent to the drying object discharge port 12 of the drying chamber 10, A secondary drying means (40) for secondary drying the drying object by using hot air supplied from the hot air heating and heating means (50) and a reheating hot air supplied from the hot air heating means (50) And a hot air recovery heating means (50) for recovering and reheating and then supplying reheating hot air to the secondary drying means,
The secondary drying means 40 is provided at its lower end with a reheated hot air supply port 41 through which hot air from the hot air generator 16 and reheated hot air from the hot air recovery heating means 50 are supplied, The drying chamber 10 is provided with a drying object supply port 42 that is dried in the drying chamber 10 and a drying object discharge pipe 43 through which an object to be dried, A secondary drying chamber 44 which is disposed adjacent to the drying chamber 12 of the drying chamber 12; The upper end portion is connected to the hot air discharge pipe 14 connected to the drying chamber 10 in a communicable manner and the lower end portion is provided with a secondary drying final dried discharge hole 45. One side of the secondary dry chamber 44 And a drying final discharge pipe (46) communicably connected to the drying-object discharge pipe (43) of the drying-type drying-air discharge pipe (43).
The method of claim 5,
And a second conveyor (47) for conveying the secondarily dried article to a desired place is disposed at an outlet of the dried final product discharge pipe (46).
The method of claim 5,
A mixing unit 48 for mixing the hot air flowing through the hot air discharge pipe 14 and the hot air discharged from the final product discharge pipe 46 is installed at the position of the hot air discharge pipe 14 to which the upper end of the dry final product discharge pipe 46 is connected Wherein the hot air and the microwave are used in a batch drying system.
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