KR101390646B1 - Food waste dryer of high efficiency with the heat pump for dehumidification and the heat pipe for heat recovery - Google Patents

Abstract

In the paddle dryer of food waste, the moisture in the food waste is evaporated by heating with electricity or other heat, and the high-temperature humidifier generated in the drying process lowers the temperature together with the heat recovery water through the evaporator of the heat pipe and flows into the evaporator of the heat pump The dehumidified low temperature dry air is heated by the heat recovered from the heat pipe to increase the primary temperature and then reheated from the condensation portion of the heat pump to the hot dry air, thereby improving the efficiency of the drying process by recovering the waste heat of the high- The present invention relates to a high-efficiency food waste drying apparatus provided with a heat pump for dehumidification and a heat pipe for heat recovery capable of increasing the amount of dehumidification per unit dry air in accordance with the decrease in absolute humidity of the dryer inlet due to the dehumidification process.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a high-efficiency food waste drying apparatus having a dehumidifying heat pump and a heat recovery heat pipe,

The present invention relates to a method for dehumidifying a food waste by heating it with electric or other heat in a food waste drier to evaporate moisture in the food waste, and the hot water humidifier generated in the drying process lowers the temperature together with the heat recovery water through the evaporator of the heat pipe, And the dehumidified low-temperature dry air is reheated by the heat recovered from the heatpipe to increase the primary temperature, and then reheated from the condensation portion of the heatpump to the hot dry air, thereby improving the efficiency of the drying process by recovering waste heat of the high- The present invention relates to a high-efficiency food waste drying apparatus provided with a heat pump for dehumidification and a heat pipe for heat recovery capable of increasing the amount of dehumidification per unit dry air in accordance with the decrease in the absolute humidity of the dryer inlet by the dehumidification process.

Since the food waste drying process has a high moisture content, the heating process of the conduction convection type is used by heating the heat oil outside the dryer box at a small capacity, and energy consumption is very high in the drying process. It is a fact that it is getting big attention.

As shown in FIG. 1, the conventional apparatus for drying food waste includes a dryer 100 for heating an internal heating medium by electricity, and drying internal food wastes through heat conduction of the heating medium, And a fin-tube heat exchanger (110) for dehumidifying the high-temperature humidifier discharged from the dryer (100) to the atmosphere.

However, in the conventional food waste drying apparatus, when food waste is dried, environmental pollution occurs due to direct exhaust of a part of the high-temperature humidifier generated in the drying process, and when the high-temperature air is used, Since the absolute humidity of the inflow air is kept high, the amount of dehumidification per unit dry air is reduced and a large amount of circulating air is required, which increases the power of the pump and the capacity of the fin heat exchanger.

SUMMARY OF THE INVENTION The present invention has been conceived to solve the above-mentioned problems. It is an object of the present invention to provide a method and apparatus for heating a food waste by heating the heat of the heat oil by using electricity or other heat source, The heat in the high-temperature humidifier of high enthalpy contained in the evaporation process is recovered from the evaporation portion of the heat pipe type heat exchanger and is passed through the evaporator of the heat pump for dehumidifying by lowering the temperature, thereby reducing the load of the heat pump The low-temperature air lowered after dehumidification in the evaporation portion of the heat pump is reheated in the condenser of the heat pipe and then heated in the condensing portion of the heat pump to reduce the load on the heat pump to heat the food waste, ,

In addition, by lowering the absolute humidity of the drying process by dehumidification in the evaporating portion of the heat pump, the amount of water removed per unit dry air for drying is increased, and the power required for the pump can be reduced as the circulating amount of drying air is reduced. Since the high-temperature humidifier after the miniaturization and the drying process contains high thermal energy, it is possible to achieve the coefficient of performance (COP) of the whole heat pump by 4 to 5 by heat recovery, dehumidification and reheating by the heat pipe and the heat pump, It is possible to reduce the drying time by 50% compared to the energy consumption of the drying process and it is possible to develop a high efficiency food waste drying device equipped with a heat pump for dehumidification and a heat pipe for heat recovery capable of developing a dryer for food waste with a low- .

In order to solve the above-mentioned problems, the present invention provides a drying apparatus (10) for drying an object to be dried; An evaporator 30 for absorbing the heat of the air discharged from the drying device 10; An evaporator (40) for dehumidifying the air passing through the evaporator (30); A condenser 50 for preheating the air having passed through the evaporator 40 into heat absorbed by the evaporator 30; A condenser 60 for reheating and discharging preheated air from the condenser 50; .

As described above, according to the present invention,

1. From the technical point of view, it is possible to secure designing technology for high efficiency of food waste drying device by recovering waste heat of drying process, and to enable high efficiency and short time drying of food waste, There is an effect to be improved.

2. From the environmental point of view, it is possible to reduce the drying cost of food waste and to recover the heat from the evaporation part of the heat pipe from the high-temperature humidifier and to discharge some middle humid air humidifier. And it is expected that reduction of environmental pollution due to landfill and dumping can be expected by securing low-cost drying technology of food waste.

3. From the economic and industrial point of view, heat recovery of hot water humidifier by heat pipe technology and dehumidification and heating by heat pump technology increase the absolute humidity difference at the inlet and outlet of the dryer, It is possible to reduce energy consumption by 50% compared with the drying of electric energy, and it is possible to import substitute and increase export by domesticization of design technology of high efficiency food waste dryer.

1 shows a conventional food waste drying apparatus.
2 is a view of one embodiment showing a food waste drying apparatus (semi-closed) according to the present invention.
3 is a view of another embodiment showing a food waste drying apparatus (semi-closed) according to the present invention.
4 is a view of one embodiment showing a food waste drying apparatus (completely enclosed) according to the present invention.
FIG. 5 is a view of an embodiment showing another embodiment of a food waste drying apparatus according to the present invention. FIG.

Before describing in detail several embodiments of the invention, it will be appreciated that the application is not limited to the details of construction and arrangement of components set forth in the following detailed description or illustrated in the drawings. The invention may be embodied and carried out in other embodiments and carried out in various ways. It should also be noted that the device or element orientation (e.g., "front,""back,""up,""down,""top,""bottom, Expressions and predicates used herein for terms such as "left,"" right, "" lateral, " and the like are used merely to simplify the description of the present invention, Or that the element has to have a particular orientation.

The present invention has the following features in order to achieve the above object.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

According to one embodiment of the present invention,

A drying device (10) for drying the drying object; An evaporator 30 for absorbing the heat of the air discharged from the drying device 10; An evaporator (40) for dehumidifying the air passing through the evaporator (30); A condenser 50 for preheating the air having passed through the evaporator 40 into heat absorbed by the evaporator 30; A condenser 60 for reheating and discharging preheated air from the condenser 50; .

A part of the air discharged from the drying apparatus 10 is discharged to the outside after passing through the evaporator 30 and the air discharged from the evaporator 30 after passing through the condenser 50 And is mixed with the outside air to flow to the condenser (60), thereby achieving a semi-closed structure.

The air discharged from the drying apparatus 10 is dehumidified through the evaporator 40 and mixed with the outside air to flow to the condenser 50. After being reheated in the condenser 50, And then flows to the condenser 60, thereby achieving a semi-closed structure.

The air discharged from the drying apparatus 10 is dehumidified through the evaporator 40 and flows to the condenser 50 without mixing with the outside air, , So that a completely sealed structure is obtained.

In addition, the drying apparatus (10) is characterized in that a heating device (11) operated by a heat source is installed inside and the dried material is heated and dried.

A circulation fan (20) circulating the air of the drying device (10); A compressor (70) installed between the evaporator (40) and the condenser (60) for compressing the circulating working fluid; An expansion valve (80) for thermally expanding the working fluid through the condenser (60) and delivering it to the evaporator (40); Is further provided.

The heated air flowing sequentially through the condenser 50 and the condenser 60 is re-introduced into the drying apparatus 10 to be used for drying the laundry.

The heated air passing through the condensing section 50 is re-introduced into the drying apparatus 10 through the condenser 60 without being reheated, so that the air is used for drying the dried object.

The air heated by the dehumidifying drying process while passing through the evaporator 40 passes through the condenser 50 and is then re-introduced into the drying device 10 without reheating through the condenser 60, The heated air is introduced into the drying apparatus 10 and used together with the heating apparatus 11 as a heat source for heating the drying apparatus .

Hereinafter, a highly efficient food waste drying apparatus provided with a heat pump for dehumidification and a heat pipe for heat recovery according to a preferred embodiment of the present invention will be described in detail with reference to FIG. 2 to FIG.

As shown in the figure, a high-efficiency food waste drying apparatus provided with a heat pump for dehumidification and a heat pipe for heat recovery according to the present invention includes a drying device 10, an evaporator 30, an evaporator 40, a condenser 50, (60).

The drying device 10 is a device in which the laundry to be dried is re-introduced into the place where the laundry to be dried is introduced, through the high-temperature dry air discharged through the condenser 60 to be described later, Accordingly, the drying apparatus 10 can be installed with a heating device 11 driven by various heat sources (other heat sources such as electricity) to dry the laundry.

When the drying process is performed in the drying apparatus 10 as described above, the drying apparatus 10 generates humid air (Md, high-temperature moisture vapor, or high-temperature steam) with high temperature due to drying of the drying object, The high-temperature humidifier flows through the circulating fan 20 to the evaporator 30 connected to the drying apparatus 10.

The evaporator 30 corresponds to the heat-recovering heat pipe unit B of the present invention, and operates in conjunction with the condenser 50 described later.

The evaporator 30 has a function of absorbing the heat of the high-temperature humidifier by heat-exchanging with the high-humidity moisturizer delivered from the drying device 10 described above, Thereafter becomes a mesophilic humidifier state having a relatively lower temperature than that at the time of being first discharged in the drying apparatus 10. [

The air (atmospheric moisture humidifier) that has passed through the evaporator 30 flows into the evaporator 40, which will be described later.

The evaporator 40 has a configuration corresponding to the dehumidifying heat pump means A in the present invention and is configured to remove (dehumidify) moisture contained in the air (atmospheric moisture humidifier) that has been deprived of heat through the evaporator 30 , So that the humidifier at mid-temperature is in the form of low-temperature dry air.

The dehumidifying heat pump means A includes a compressor 70, a condenser 60, an expansion valve (not shown), and a condenser 60. The dehumidifying heat pump means A communicates with the evaporator 40, 80), which will be described in detail below.

The condenser 50 corresponds to the heat-recovery heat pipe means B together with the evaporator 30 described above. The condenser 50 receives heat of the high-temperature moisture vaporizer absorbed by the evaporator 30, ) And dehumidified air (low-temperature dry air) is preheated before flowing to the condenser 60, which will be described later, so as to be in the form of moderate dry air.

Of course, it is a matter of course that the evaporator 30 and the condenser 50 corresponding to the heat-recovering heat pipe means B must be mutually connected so that the refrigerant can flow therebetween.

The condenser 60 heats the air (middle-temperature dry air) that has passed through the condenser 50 described above to be in the form of high-temperature dry air. The air discharged through the condenser 60 in the form of high-temperature dry air Is preheated in the condenser 50 and reheated in the condenser 60 by allowing it to be recirculated (bypassed) into the drying apparatus 10 described above so that the drying apparatus 10 ) To be dried.

That is, as described in the description of the drying apparatus 10, the drying apparatus 10 is not provided with the heating apparatus 11 in advance, and the drying apparatus 10 is dried, The drying device 10 may also be provided with a heating device 11 in addition to the high-temperature dry air to be re-introduced to dry the laundry.

The compressor 70 and the expansion valve 80 are constituted together with the condenser 60 and the evaporator 40 described above and the compressor 70 will be described by referring to the dehumidifying heat pump means A, Temperature and high-pressure working fluid in a gaseous phase, and the condenser (60) compresses the gaseous high-temperature and high-pressure working fluid flowing in the compressor (70) Temperature liquid refrigerant in the liquid state by being heat-exchanged with the air (intermediate-temperature dry air) passing through the condensing section 50. The expansion valve 80 is connected to the condenser 50, Pressure operating fluid of the liquid phase transferred from the compressor 60 to the low-temperature and low-pressure working fluid in the form of a liquid, and the evaporator 40 is constructed such that the liquid low- Inside the device 10, And is dehumidified at a middle temperature humidifier while exchanging heat with a mesophilic humidifier which has been taken out of the temperature, so that it becomes a low temperature and low pressure working fluid in the gaseous phase.

That is, the high-temperature humidifier discharged from the drying apparatus 10 is dehumidified while sequentially passing through the evaporator 40 and the condenser 60 in the structure of the above-described dehumidifying heat pump means (A).

More specifically, the high-temperature moisture ventilator discharged from the drying apparatus 10 is heated while passing through the evaporator 30 of the heat-recovery heat pipe unit B to be described later to lower the temperature, do.

The low temperature dry air is passed through the condenser 50 of the heat recovering heat pipe means B to form a medium temperature dry air as it passes through the evaporator 40, And is reheated while passing through the condenser 60 of the dehumidifying heat pump means A to be discharged in the form of high-temperature dry air.

In addition, according to the present invention having the above-described configuration, it is possible to have two types of semi-sealing structures and three sealing structures, which are completely sealed, according to the type of air discharge.

FIG. 2 shows a first embodiment of a semi-closed structure in which a high-temperature humidifier discharged from a drying apparatus 10 passes through an evaporator 30 of a heat-recovery heat pipe means B, Some of them are discharged to the outside.

The humid hot air is dehumidified through the evaporator 40 and becomes low temperature dry air and is preheated by the condenser 50 and then discharged through the evaporator 30 to the outside air (Ma) is mixed with the mesophilic dry air discharged from the condenser (50), and reheated in the condenser (60).

That is, the semi-hermetic structure (system) is used in which a part of the humid air humidifier is discharged to the outside, but the outside air is mixed by the amount of the discharged air.

3 shows a second embodiment of the semi-closed structure in which the high-temperature humidifier discharged from the drying apparatus 10 is heated while passing through the evaporator 30 and the low-temperature dry air dehumidified while passing through the evaporator 40, And the mixture is pre-heated in the condensing section (50).

The air heated by the condenser 50 to be in the form of a mesophase air is discharged to the outside by the amount of air mixed in the condenser 50 and then reheated in the condenser 60 .

That is, the low-temperature dry air is mixed with the outside air sucked separately in the condenser 50, and a part of the middle-temperature dry air introduced into the condenser 60 is discharged by the outside air amount (air amount) sucked for mixing in the condensed water, Sealed system (system).

4 is an example of a completely closed structure in which the drying device 10 is not provided with the heating device 11 therein and the drying object is dried through the high temperature drying air recirculated from the condenser 60, The high-temperature humidifier discharged from the apparatus 10 passes through the evaporator 30 and passes through the condenser 50 in a state where the humidifier after dehumidification in the evaporator 40 does not mix with the outside air The outside air is exhausted to the outside through the condenser 60 and the drying air (the mesophilic dry air) passing through the condenser 50 is reheated in the condenser 60 so that the outside air flows into the drying apparatus The air of the drying apparatus 10 mixed with the air discharged from the drying apparatus 10 or flowing in various configurations (the evaporator 30, the evaporator 40, the condenser 50, the condenser 60, etc.) (System) that is not discharged to the outside of the apparatus 10.

Hereinafter, the flow of the high-temperature wet scrubber generated in the drying apparatus 10, the phase change and the temperature change, whether or not the moisture is maintained, etc. will be described based on the above configuration.

1. When the drying apparatus (10) is driven, a dry humidifier is generated in the inside of the drying apparatus.

2. The high temperature humidifier generated in the drying apparatus 10 is moved to the evaporator 30 through the circulation fan 20 and the heat is recovered by heat exchange with the high temperature humidifier in the evaporator 30, The deprived high-temperature humidifier becomes a mesophile humidifier and moves to the evaporator 40. Of course, the heat recovered in the evaporator 30 is transferred to the condenser 50.

3. The humidifier is dehumidified while passing through the evaporator 40 of the dehumidifying heat pump means (A) and becomes a low-temperature dry air.

4. The low-temperature dry air passing through the evaporator 40 is pre-heated through the condenser 50, which receives heat from the evaporator 30 before passing through the condenser 60, to become a medium-temperature dry air.

5. The mesophilic dry air passing through the condenser 50 is heat-exchanged (heated) through the condenser 60 to become a high-temperature dry air.

6. High-temperature dry air passing through the condenser 60 flows into the drying apparatus 10 and is reused for drying the food product (food waste).

In addition, the above-mentioned high temperature means the initial temperature of the humidifier discharged from the drying apparatus 10 (the temperature can be variously changed depending on the heating time, the heat source used, etc.) The lower temperature means a relatively lower temperature than the above-mentioned initial temperature, and the lower temperature means a relatively lower temperature than the above-mentioned middle temperature.

5, the heated air passing through the condenser 50 is reheated while continuously passing through the condenser 60. However, according to another embodiment of the present invention, The heated air may be re-introduced into the drying apparatus 10 immediately after being reheated through the condenser 60 so as to be used for drying the laundry,

5, the air heated while passing through the condenser 50 in the drying process, which is dehumidified while passing through the evaporator 40, is not reheated through the condenser 60, The heated air flows into the drying apparatus 10 while the outside air passes through the condensing section 50. The heated air flows into the heating apparatus 11 Heater) to be used as the heating source of the drying device.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is to be understood that various changes and modifications may be made without departing from the scope of the appended claims.

10: drying device 11: heating device
20: circulating fan 30: evaporator
40: evaporator 50: condenser
60: condenser 70: compressor
80: Expansion valve
A: Dehumidifying heat pump means
B: heat pipe for heat recovery

Claims (9)

A drying device (10) for drying the drying object;
An evaporator 30 for absorbing the heat of the air discharged from the drying device 10;
An evaporator (40) for dehumidifying the air passing through the evaporator (30);
A condenser 50 for preheating the air having passed through the evaporator 40 into heat absorbed by the evaporator 30;
A condenser 60 for reheating and discharging preheated air from the condenser 50;
A circulation fan (20) circulating the air of the drying device (10);
A compressor (70) installed between the evaporator (40) and the condenser (60) for compressing the circulating working fluid;
An expansion valve (80) for thermally expanding the working fluid through the condenser (60) and delivering it to the evaporator (40);
And a heat pipe for heat recovery, wherein the heat pump for dehumidifying and the heat pipe for heat recovery are provided.
The method according to claim 1,
The air discharged from the drying apparatus (10)
After passing through the evaporator 30, a part thereof is discharged to the outside,
And a condenser (50), the evaporator (30) is mixed with the outside air as much as the amount of exhaust gas discharged from the evaporator (30) and flows to the condenser (60) High efficiency food waste drying device with heat pipe.
The method according to claim 1,
The air discharged from the drying apparatus (10)
After being dehumidified through the evaporator (40), it is mixed with the outside air and flows to the condenser (50)
And the refrigerant is reheated in the condenser (50), discharged to the outside by the mixed amount of the refrigerant in the evaporator (40), and then flows to the condenser (60) A high efficiency food waste drying device equipped with a heat pipe for the food waste.
The method according to claim 1,
The air discharged from the drying apparatus (10)
Is dehumidified through the evaporator (40) and flows into the condenser (50) without mixing with the outside air,
Wherein the condensing part (50) is configured to allow the outside air to pass therethrough and to be discharged to a completely closed structure, and a heat pipe for heat recovery.
4. The method according to claim 2 or 3,
The drying device (10)
A high-efficiency food waste drying apparatus provided with a heat pump (11) for dehumidification and a heat pipe for heat recovery, wherein a heating device (11) operated by a heat source is installed inside and heating and drying the laundry.
The method according to claim 1,
The heated air, which flows sequentially through the condenser (50) and the condenser (60)
Wherein the drying device (10) is used for drying the object to be dried, and a heat pipe for heat recovery.
The method according to claim 1,
The heated air passing through the condensing section (50)
Wherein the condenser (60) is reheated to the drying apparatus (10) without being reheated, so that the condensed water is used for drying the object to be dried, and a heat pipe for heat recovery.
The method according to claim 1,
The air heated while passing through the condenser (50) in the drying process dehumidified while passing through the evaporator (40)
The heated air is introduced into the drying apparatus 10 while the outside air passes through the condensing section 50 so that the heated air flows into the drying apparatus 10 without being reheated through the condenser 60, And is used as a heat source for heat of the drying device together with the heating device (11), and a device for drying highly efficient food waste provided with a heat pipe for heat recovery.
delete

Images