KR101479849B1 - Drying Apparatus With Pyrolysis Function - Google Patents

Abstract

According to the present invention, provided is a drying apparatus comprising: a drying container which accommodates an object to be dried and has a stirrer; a deodorization unit which facilitates drying of an object to be dried by heating a lower part of the drying container and pyrolyzes an organic matter generated from the object to be dried; a condenser which receives vapor including the organic matter generated from the object to be dried and cools the vapor to be condensed into condensate water; a blower which allows the vapor including the organic matter in the drying container to flow into the condenser by generating air pressure difference and sends the organic matter and the vapor which is not condensed by the condenser to the deodorization unit; an outlet pipe which functions as a passage to send the organic matter and the vapor in the drying container to the condenser; and a container cover which is placed on an upper end of the drying container. The drying apparatus can reduce foul odor and have improved energy efficiency, as compared to a conventional method, by simultaneously performing two functions of pyrolyzing the organic matter and heating the object to be dried.

Description

[0001] Drying Apparatus with Pyrolysis Function [0002]

The present invention relates to a food and beverage drying apparatus which is capable of reducing the generation of malodorous and harmful substances generated during drying treatment of food garbage and having high energy efficiency. More specifically, the present invention relates to a food waste drying apparatus with improved energy efficiency, which has a function of heating the garbage to generate steam by heating the garbage during the process of drying the garbage, and at the same time having a function of pyrolyzing the organic matter contained in the steam will be.

Food waste contains about 80-90% of water, so if left untreated, it will corrode and harm the environment such as generating odor. Wasteful food waste has various environmental problems when it is buried or incinerated. It is therefore desirable to treat food waste as feed, compost, or fuel instead of being buried or incinerated. In order to recycle food waste, a drying process is generally required to reduce the moisture content of the waste.

When food waste is dried, the more the anaerobic condition is formed, the more bad odor is generated as the drying progresses. These odors are not only harmful to human body but also cause environmental pollution and discomfort. In order to solve this problem, various food processing machines with various kinds of techniques have been introduced and various methods for removing organic substances including odors generated during drying of food have been suggested. Among them, a device for treating food waste by a hot air drying method with stirring and crushing function is known to dry the waste more efficiently than other methods.

On the other hand, direct combustion method, catalytic oxidation method, activated carbon absorption method and the like are used as a method of removing organic matter which is a cause of odor generated from food waste, but catalytic oxidation method and activated carbon absorption method require periodical replacement of parts and odor It does not completely remove the organics that are caused.

In addition, conventional food waste disposers are structurally complicated and inefficient because they are separately provided with heating means for heating the food waste to generate steam and deodorizing means for treating the organic matter contained in the steam. Also, since the deodorizing means has a low deodorization efficiency of the organic matter that can be treated per unit time, the entire drying time is disadvantageously increased.

Therefore, in order for the method of recycling food waste through the drying process to be a continuous and effective method of disposing of the garbage, it is necessary to reduce the energy consumption by increasing the drying efficiency of the apparatus for treating food waste, and efficiently remove organic matters including odors generated with the steam There is a need for a food waste drying device.

The present invention provides a food garbage drying apparatus having improved energy efficiency by using a pyrolysis system to purify odors and contaminants generated when a food is dried, and to heat a food by using a heat source used for pyrolysis .

Registered patent: 10-0337475 (Food waste disposal device). Registered patent: 10-0454876 (Food waste disposal system). Registered patent: 10-0480700 (garbage processor). Registered patent: 10-0776311 (Food waste disposal device). Registered patent: 10-0990164 (Food waste disposal device). Registered Patent: 10-1025554 (Food Waste Disposal System). Patent application: 10-2012-0141567 (food dryers with pyrolysis function). Patent application: 10-2012-0148331 (Drying device with pyrolysis function). Patent application: 10-2013-0029556 (drying device with pyrolysis function).

Drying of food waste generates organic matter and steam which cause odor in the process, which causes environmental problems and discomfort of residents. The drying apparatus for treating an object to be dried such as food wastes according to the conventional art has low drying efficiency or deodorization efficiency of organic matter. The present invention provides a drying apparatus capable of reducing the energy consumption by increasing the drying efficiency of an apparatus for treating a drying object and efficiently removing organic matters including odors generated together with steam.

A drying apparatus according to the present invention includes: a drying vessel having an agitator for containing an object to be dried and stirring the object to be dried; A deodorizing unit for heating the lower part of the drying vessel to promote drying of the drying object, and an organic matter generated from the drying object to be introduced and pyrolyzed; A condenser for introducing steam containing organic matter generated from the object to be dried and cooling the steam to make condensed water; A blower for generating an air pressure difference to allow the steam containing the organic matter in the drying vessel to flow into the condenser and the condensed steam and organic matter to the deodorizer; A discharge pipe installed to connect the condenser and the drying vessel and serving as a passage for introducing the steam and organic matter in the drying vessel into the condenser; And a container cover provided at an upper end of the drying container and configured to close or open the opening of the drying container.

The deodorizing unit includes heating means for emitting heat using electricity to be applied; A hollow tube which surrounds the heating means and which is heated by the heating means and supplies the radiant heat to the heating tube; A combustion space formed between the heating means and the combustion tube, the combustion space being pyrolyzed with organic matter flowing therein; And a heating tube which surrounds the heating means and the combustion tube so as to be hermetically sealed from the outside, and has an inlet through which condensed steam and organic matter are sucked into the condenser; And a heat recovery pipe connected to the combustion tube so as to communicate with air and passing through the side surface of the heating tube and serving as a passage through which the high temperature air pyrolyzed and vaporized by the heating means exits the combustion space.

In addition to the above-described components, the drying apparatus according to the present invention may further include a pipe through which a cooling fan or cooling water circulating through the condenser for blowing air to facilitate condensation of the steam introduced into the condenser is circulated.

The drying apparatus according to the present invention drys the laundry and pyrolyzes the organic matter through the following process.

First, when power is supplied to the heating means, the heating means radiates heat to heat the combustion space. The heat radiated by the heating means is also transferred to the heating tube through the combustion tube to raise the temperature of the heating tube. The drying vessel is heated by the heat of the heating tube located at the bottom, the heat is transferred to the drying object, and steam containing organic matter is generated from the drying object. The steam containing the organic matter of the drying vessel moves along the discharge pipe due to the air pressure difference generated by the blower and flows into the condenser installed outside the drying vessel. Steam containing organics is cooled in a condenser, and the condensate is stored in a condensate container. Unconcentrated vapor and organic matter in the condenser travel through the blower and into the heating tube through the inlet. The gas moving into the heating tube flows into the combustion tube and is pyrolyzed while passing through the combustion space. The hot gas passing through the combustion space exits the combustion tube through the heat recovery tube and flows into the drying vessel to directly heat the drying object.

As described above, the object to be dried is simultaneously heated outside and inside the drying vessel to promote drying. In addition, according to the present invention, since the drying apparatus is repeatedly condensed and pyrolyzed by circulation of the gas in a closed state, odor and contaminants generated when drying the dried object are remarkably reduced.

The drying apparatus according to the present invention has the following effects.

First, the deodorizing unit including the heating means is provided with a heat source to heat the object to be dried, and also acts as a means for pyrolyzing organic matters generated in the drying container. The energy efficiency is higher and the structure is simpler than the conventional drying apparatus.

Second, the drying speed is fast due to simultaneous heating inside and outside of drying room.

1 is a schematic side cross-sectional view showing the overall configuration of a drying apparatus 10 according to an embodiment of the present invention.
2 is a plan sectional view of the deodorizing unit 100 enlarged.
3 is a cross-sectional view taken along line 3-3 in Fig.

Other features and actions of the present invention will be described in detail with reference to the following examples.

1 is a schematic side cross-sectional view showing the overall structure of a drying apparatus 10 according to an embodiment of the present invention,

FIG. 2 is a plan view of the deodorizer 100 in an enlarged scale, and FIG. 3 is a sectional view of FIG. 2 taken along line 3-3.

1 and 2, the drying apparatus 10 includes a drying vessel 20, a blower 60, a condenser 70, a cooling fan 72, a condensate vessel 75, And includes a motor 80, a gear portion 85, a deodorization portion 100, and a container cover 22 connected to the upper end of the main body 28.

The drying vessel 20 accommodates the object to be dried inside via an opening at an upper end thereof, and a stirrer 26 is provided at the bottom of the vessel. The deodorizing unit 100 is installed at the lower part of the outer surface of the drying vessel 20 to promote the drying of the drying vessel 20 by heating the drying vessel 20 and to pyrolyze the organic matter generated from the drying vessel. The stirrer 26 is connected to a gear portion 85 that is axially coupled to a motor 80 that generates a rotational force and is also axially coupled to the stirrer 26 to stir / crush the dried object. The upper opening of the drying vessel (20) is sealed by the vessel lid (22). The container lid 22 is rotatably connected to the upper end of the main body 28 through a hinge 90. The drying lid 20 is rotatably connected to the main body 28 when the container lid 22 is rotated upward to open Separation is possible.

The condenser (70) is a means for cooling and condensing the vapor generated from the object to be dried, and a cold air or a tube through which the cooling water flows is provided in the inside of the condenser (70) to perform heat exchange with the steam. The blower 60 has an inlet and an outlet to generate an air pressure difference to introduce steam containing organic matter in the drying vessel 20 into the condenser 70 and send the organic matter including the non-condensed steam to the deodorizer 100 . Further, by controlling the rotation speed of the blower 60, the amount of steam including the organic matter flowing into the condenser 70 per unit time can be controlled. The steam and the organic substances in the drying vessel 20 are connected to the condenser 70 via a discharge pipe 24 connected to the drying vessel 20 so as to communicate with the condenser 70 in a gas communication manner and in a gas communication manner.

The condenser vessel 75 is installed under the condenser 70 as a place for receiving and storing the condensed water generated by cooling the steam in the condenser 70.

As shown in detail in FIGS. 1 and 3, the deodorizing unit 100 includes a heating means 30 for radiating heat, a hollow tube for surrounding the heating means 30, a heating means 30 for heating A combustion tube 40 for supplying the radiant heat to the heating tube 50; A combustion space (35) formed between the heating means (30) and the combustion tube (40), into which organic matter flows and is thermally decomposed; A heating tube 50 enclosing the heating means 30 and the combustion tube 40 so as to be hermetically sealed from outside with an inlet 55 through which condensed steam and organic matter are sucked into the condenser 70; And a tube penetrating the side surface of the heating tube 50 so as to communicate air with the combustion tube 40. The high temperature air pyrolyzed and vaporized by the heating means 30 exits the combustion space 35 And a heat recovery pipe 45 serving as a passage.

The heating means 30 is composed of any one of a cartridge heater and a tubular heater that emits heat using the electricity to be applied. The heating means 30 preferably has a power consumption per hour between 1,200 watts (W) and 200 watts (W). When the power consumption per hour of the heating means 30 is 1,200 W or more, the heat generation amount is increased to improve the pyrolysis performance and promote the heating of the food waste. However, the drying vessel 20 is overheated unnecessarily and the energy efficiency is lowered. When the power consumption per hour of the heating means 30 is less than 200 watts (W), there is a disadvantage that the pyrolysis performance is lowered and the heating required for drying the laundry is slowed down.

Since the surface temperature of the heating means 30 is maintained at 700 ° C or higher during operation, it is preferable that the heating means 30 is made of any one of Inconel or Incoloy having excellent corrosion resistance and heat resistance.

The combustion tube (40) surrounds the heating means (30) and serves to confine the heat emitted through the surface of the heating means (30). Between the heating means 30 and the combustion tube 40, a combustion space 35 through which air can flow is formed. The combustion space 35 is heated by the heating means 30 and is held by keeping the combustion space 35 close to the surface temperature of the heating means 30 by confining the heat that the combustion tube 40 emits around the heating means 30 , The organic matter passing through the combustion space 35 is effectively pyrolyzed and purified.

It is preferable that the combustion tube 40 has a structure in which both ends are opened in the form of a tube having a space formed therein. A tube-shaped heat recovery pipe 45 having a diameter smaller than that of the combustion tube 40 which is connected to the combustion space 35 so as to communicate with the air and which penetrates the side surface of the heating tube 50 is provided in the middle portion of the combustion tube 40 . The high-temperature gas and water vapor pyrolyzed in the combustion space 35 are discharged from the deodorizing unit 100 through the heat recovery pipe 45.

The combustion tube 40 is preferably made of Inconel, Incoloy, or stainless steel having excellent corrosion resistance and heat resistance.

The heating tube 50 is installed so as to be in contact with the lower part of the outer surface of the drying vessel 20 so that the heat of the heating tube 50 rises and is efficiently transferred to the drying vessel 20. The heating tube 50 has a donut-shaped structure in which the heating means 30 and the combustion tube 40 are hermetically sealed from the outside. The axis of the gear portion 85 connected to the agitator 26 passes through a donut hole corresponding to the center of the outer surface of the heating pipe 50. The side of the heating tube 50 is also provided with an inlet 55 through which condensed steam and organic matter are sucked into the condenser 70.

Hereinafter, the thermal decomposition process of the organic matter including the drying of the drying object and the vapor generated from the drying object will be described in detail.

First, when power is supplied to the heating means (30), the heating means (30) radiates heat and the temperature of the combustion space (35) rises. The heat that the heating means 30 emits also increases the temperature by heating the heating tube 50 through the combustion tube 40. The heat of the heating tube 50 is transferred to the drying object through the lower portion of the drying container 20 and steam containing the organic material is generated in the drying container 20 from the drying object.

The vapor containing the organic matter in the drying vessel 20 is sucked into the discharge pipe 24 by the air pressure difference generated by the blower 60 (line F0), and the vapor containing the organic matter moving along the discharge pipe 24 flows into the condenser 70 (line F1). The condenser 70 is provided with a cooling fan 72 for blowing air to the condenser 70 to promote the condensation of the steam introduced into the condenser 70 or a pipe (not shown) through which the cooling water circulates. The condensed water generated by cooling the vapor in the condenser 70 is collected in the condensate container 75 (line F2), purified by activated carbon, and discharged to the outside. Vapor and organic substances not condensed in the condenser 70 flow into the blower 60 through an inlet of a blower 60 and are exhausted through an outlet of a blower 60, And flows into the inlet 55 located on the side of the heating tube 50 (line F3).

The steam and the organic material flowing into the inlet 55 pass through the inside of the heating tube 50 (line F4) and the temperature rises. The vapor and the organic matter whose temperature has risen are introduced into the combustion space 35 through both end openings of the combustion tube 40 (line F5). The steam and the organic matter are pyrolyzed and purified by carbon dioxide, water vapor or the like in the course of passing through the combustion space 35 (line F6). The hot gas passing through the combustion space 35 is exhausted through the heat recovery pipe 45 (line F7) and then flows into the drying vessel 20 (line F8). The hot gas is mixed with the steam containing the dried material and the organic material in the drying vessel 20 to perform heat exchange (line F9). Organic materials including steam and gas mixed in the drying vessel 20 flow into the condenser 50 and the deodorizer 100 again and repeat the drying and deodorization cycle.

In this way, the object to be dried is heated and deodorized at the lower part of the drying vessel 20 by the deodorization unit 100, and then heated to the outside of the drying vessel 20, And the inside is simultaneously heated to promote drying.

As described above, since the drying and deodorizing process according to the present invention has a structure in which the gas circulates in the closed state, the condensation of the vapor by the condenser 70 and the thermal decomposition of the organic material by the deodorization unit 100 are Repeatedly, the laundry is dried, and contaminants generated during drying are purified.

According to the present invention, the deodorizing unit 100 can simultaneously perform two actions of heating the drying object by providing heat to the drying container 20 in addition to the function of thermally decomposing the organic material. Thus, energy efficiency is improved, This reduced drying apparatus 10 is provided.

The scope of the present invention is not limited to the above-described embodiments, and various changes and modifications may be made by those skilled in the art. Accordingly, the invention is limited only by the following claims.

10: Drying apparatus 20: Drying vessel
22: container lid 24: discharge pipe
26: stirrer 28:
30: Heating means 35: Combustion space
40: combustion tube 45: heat recovery tube
50: heating tube 55: inlet
60: Blower 70: Condenser
72: Cooling fan 75: Condensate container
80: motor 85: gear part
90: Hinge 100: Deodorizer
F0: Flow in which steam containing organic matter in the drying vessel (20) flows into the discharge pipe (24).
F1: Flow in which steam containing organic matter introduced into the discharge pipe (24) is transferred to the condenser (70).
F2: Flow in which the condensate generated in the condenser (70) moves to the condensate container (75).
F3: Flow in which condensed vapor and organic matter in the condenser 70 pass through the blower 60 and into the inlet 55.
F4: Flow in which steam and organic substances flowing through the inlet port (55) move inside the heating tube (50).
F5: Flow in which steam and organic matter enter the combustion space (35).
F6: Flow in which the organic matter that is pyrolyzed while passing through the combustion space (35) and the high-temperature steam move toward the heat recovery pipe (45).
F7: Flow of the hot gas passing through the heat recovery pipe (45) and moving toward the upper end of the drying vessel (20).
F8: Flow of hot gas flowing into the drying vessel (20).
F9: Flow in which a hot gas is heat-exchanged / mixed with steam containing drying and organic matter in a drying vessel (20).

Claims (8)

A drying vessel provided with a stirrer for containing an object to be dried and stirring the object to be dried; The present invention relates to an apparatus and a method for drying a dried object by heating a lower portion of a drying vessel to accelerate the drying of the object to be dried, part; A condenser for introducing steam containing organic matter generated from the object to be dried and cooling the steam to make condensed water; A blower for generating an air pressure difference to allow the steam containing the organic matter in the drying vessel to flow into the condenser and the condensed steam and organic matter to the deodorizer; A discharge pipe installed to connect the condenser and the inside of the drying vessel and serving as a passage for introducing the steam and organic substances in the drying vessel into the condenser; And a container cover provided at an upper end of the drying container and configured to close or open the upper end opening of the drying container. The apparatus according to claim 1, wherein the deodorizing unit comprises heating means for emitting heat; A hollow tube which surrounds the heating means and which is heated by the heating means and supplies the radiant heat to the heating tube; A combustion space formed between the heating means and the combustion tube, the combustion space being pyrolyzed with organic matter flowing therein; A heating tube which surrounds the heating means and the combustion tube so as to be hermetically sealed from the outside and has an inlet through which condensed steam and organic matter are sucked into the condenser; And a heat recovery pipe connected to the combustion pipe so as to communicate with air and passing through a side surface of the heating pipe and serving as a passage through which the high temperature air pyrolyzed and vaporized by the heating means escapes from the combustion space. Lt; / RTI > The drying apparatus according to claim 1, wherein the amount of steam containing organic matter generated in the drying vessel is introduced into the condenser by controlling the rotation speed of the blower. The method according to claim 1 or 2, wherein the substrate to be dried is heated by a deodorizer and heated and recovered through a heat recovery tube, And dried. 3. Drying apparatus according to claim 2, characterized in that the heating tube has a donut-shaped structure. The method as claimed in claim 2, wherein the steam and the organic material flowing into the inlet port pass through the inside of the heating pipe, the temperature rises, and the vapor and the organic material whose temperature rises are introduced into the combustion space through both end openings of the combustion pipe, Drying device. The drying apparatus according to claim 2, wherein the combustion tube has a structure in which both ends are opened in the form of a tube having a space formed therein. 8. Drying apparatus according to claim 2 or 7, characterized in that the heat recovery tube is connected to the middle part of the combustion tube.

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