KR20060026222A - System for food waste disposer using internally circulating waste gas - Google Patents

Abstract

The present invention relates to a food waste treatment apparatus for extinguishing food waste generated at home or a restaurant using microorganisms, and more particularly, while circulating high-temperature and humid exhaust gas generated during fermentation of food waste in a fermenter. The water contained in the exhaust gas is condensed by cooling it below the dew point, some of the condensed water is discharged to the outside of the device, and some is circulated back to the fermentation tank to supply the moisture necessary for the growth of microorganisms. The odorous substances are decomposed to the aerobic microorganisms during continuous circulation in the fermenter, and the concentrated air corresponding to the amount of moisture removed from the exhaust gas is supplied into the fermenter to supply oxygen necessary for the growth of the aerobic microorganisms. High temperature and high humidity exhaust gas containing The present invention relates to an apparatus for treating food waste in the exhaust gas which is not discharged to the outside at all.

Exhaust gas internal circulation type food waste treatment apparatus according to the present invention, a main body case of a predetermined size, a fermentation tank of a predetermined size for storing and fermenting food waste and decomposition medium is installed inside the main body case, and the inside of the fermentation tank In the food waste treatment apparatus comprising a stirrer for mixing the food waste and the decomposition medium agent by a predetermined driving means, and a heating device for properly maintaining the temperature inside the fermentation tank, the food waste treatment apparatus installed in the fermentation tank It is characterized in that it comprises an exhaust gas internal circulation and dehumidifying apparatus for circulating the exhaust gas generated in the fermentation process and at the same time condensing moisture contained in the high temperature and high humidity exhaust gas.

In the present invention, the exhaust gas internal circulation and dehumidification apparatus, the internal circulation duct installed in the fermentation tank for guiding the exhaust gas generated during the fermentation process; A circulation blower installed on an exhaust gas passage of the inner circulation duct to forcibly circulate the exhaust gas; A condenser installed on an exhaust gas passage of the inner circulation duct to condense moisture contained in the exhaust gas; It is configured to include a condensate collecting unit installed in the lower portion of the condenser to collect the condensed condensate and discharged to the outside or circulated back to the fermentation tank.

In addition, the present invention is to install the air curtain using the low-temperature dry exhaust gas continuously circulated in the inlet in order to prevent the high-temperature and humid exhaust gas containing malodorous substances through the inlet opening when the food waste is introduced into the outside Characterized in that.

Food waste, condensate, exhaust gas, circulation, odor, oxygen, air, air curtain

Description

System for food waste disposer using internally circulating waste gas}

1 is a schematic cross-sectional view of a food waste treatment apparatus according to the prior art,

Figure 2 is a schematic cross-sectional view showing an exhaust gas external circulation food waste treatment apparatus according to the prior art,

Figure 3 is a schematic cross-sectional view showing an apparatus for treating food waste in the exhaust gas internal circulation according to the present invention;

4 to 6 is a schematic perspective view showing various embodiments of the exhaust gas internal circulation and dehumidification apparatus according to the present invention,

7 is a partially enlarged cross-sectional view of an exhaust gas internal circulation type food waste treating apparatus according to the present invention;

8 to 10 is a schematic view showing a variety of cooling system applied to the condenser of the exhaust gas internal circulation and dehumidifier according to the present invention,

11 is a block diagram showing an example of a concentrated air supply device for supplying concentrated air to the exhaust gas internal circulation and dehumidification apparatus according to the present invention;

12 is a schematic cross-sectional view of a food waste treatment apparatus showing the structure of an air curtain duct according to the present invention;                 

Figure 13 is a partial enlarged cross-sectional view showing the main part of the air curtain duct and guide duct in the present invention,

14 is a schematic perspective view showing the duct and the guide duct for the air curtain according to the present invention.

*** Explanation of symbols for main parts of drawing ***

10: food waste treatment device 20: body case

25: inlet 30: fermenter

50: exhaust gas internal circulation and dehumidifier 51: internal circulation duct

52: inlet 53: outlet

60: circulation blower 61: blower

70 heating device 80 condenser

81: condensing unit 83: cooling pipe

84: heat sink fin 90: water collecting part

83: condensate supply nozzle 120: condensate storage tank

122: level gauge 230: condensate water supply device

231: condensate circulation pump 271: air curtain duct

273: conversion damper 331: concentrated oxygen injection pipe

330: concentrated oxygen supply device 334: concentrated oxygen supply pump

371: guide duct 376: intermittent damper

440: concentrator S: sensor

The present invention relates to a food waste treatment apparatus for extinguishing food waste generated at home or a restaurant using microorganisms, and more particularly, while circulating high-temperature and humid exhaust gas generated during fermentation of food waste in a fermenter. The water contained in the exhaust gas is condensed by cooling it below the dew point, some of the condensed water is discharged to the outside of the device, and some is circulated back to the fermentation tank to supply the moisture necessary for the growth of microorganisms. The odorous substances are decomposed to the aerobic microorganisms during continuous circulation in the fermenter, and the concentrated air corresponding to the amount of moisture removed from the exhaust gas is supplied into the fermenter to supply oxygen necessary for the growth of the aerobic microorganisms. High temperature and high humidity exhaust gas containing The present invention relates to an apparatus for treating food waste in the exhaust gas which is not discharged to the outside at all.

Generally, as shown in FIG. 1, an extinction type food waste processing apparatus 1 using microorganisms is provided in a main body case 2 of a predetermined size and inside the main body case 2 to provide food waste and decomposition medium. A fermentation tank 3 having a predetermined size to be stored and fermented, an agitator 4 installed inside the fermentation tank 3 and mixing food waste and decomposition medium by a predetermined driving means, and one side of the fermentation tank 3. An exhaust part 5 installed in the fermentation tank 3 to discharge exhaust gas generated in the fermentation process, a suction part 6 installed at the other side of the fermentation tank 3 to suck external air, and a lower portion of the fermentation tank 3. It is composed of a heating device (7) installed to maintain the temperature inside the fermentation tank to be suitable for the growth of microorganisms.

Therefore, the fresh air from the outside during the fermentation process of food waste is introduced through the suction unit 6 to maintain an aerobic state, and the exhaust gas generated during the fermentation process is discharged to the outside through the exhaust unit 5. However, since the exhaust gas discharged through the exhaust part 5 contains a large amount of water vapor and odorous substances generated during the fermentation process, the exhaust gas may cause malaise or adversely affect the indoor / outdoor environment.

Accordingly, the exhaust gas discharged through the exhaust part 5 is generally subjected to a separate treatment process. For example, an exhaust hose and a blower having a predetermined length are installed in the exhaust part 5 to be discharged to the outside through a vent or drain in a building or apartment, or an exhaust duct of a predetermined length is connected to the exhaust part 5. The exhaust duct is provided with a condenser for condensing moisture contained in the exhaust gas and a deodorizing device for removing odorous substances, and is discharged after removing moisture and odor from the exhaust gas. However, in order to remove odorous substances discharged through the exhaust duct, expensive equipment such as high temperature heating heaters, catalysts, and filters must be used, which not only increases the cost of the product but also increases the power consumption and requires regular replacement of consumables. There was a problem that is elevated. In addition, even using such a deodorizing device could not completely prevent the generation of odor due to the limit of deodorization efficiency. In addition, the direct discharge of exhaust gas to the ventilation and sewer through the exhaust hose has the advantage of low treatment cost. However, when used in group dwellings such as apartment complexes, there is a problem that odors are generated in the entire residential area. It did not solve.

Accordingly, the present inventors have developed and applied for an "exhaust gas whole circulation food waste treatment apparatus" (Application No. 10-2004-49816) which circulates the entire exhaust gas generated in the fermentation tank. As shown in FIG. 2, the present invention discloses a high temperature and high humidity while circulating exhaust gas discharged through the exhaust part 5 of the fermentation tank 3 through an external circulation duct 11 installed outside the fermentation tank 3. The water contained in the exhaust gas is cooled to condense under the dew point, the condensed water is discharged to the outside, and external air corresponding to the amount of water removed is injected. That is, the hot and humid exhaust gas generated in the fermentation tank 3 is circulated along the external circulation duct 11 while passing through the condenser 14, the moisture contained in the exhaust gas is condensed and removed by the condensed water, the amount of water removed The external air corresponding to the air is supplied to the fermentation tank 3 through the air inlet 16. And the condensed water condensed in the condenser 14 is stored in the reservoir 18 is to be discharged to the outside.

However, since the exhaust gas external circulation food waste treatment apparatus 1 is a structure in which the exhaust gas is circulated through the exhaust gas external circulation duct 11 installed outside the fermentation tank 3, the circulating duct 11 must have a gas tight structure so as to cause odor. Can be prevented from leaking. Therefore, the conventional exhaust gas external circulation duct 11 has a problem that the production cost increases because it must have a relatively precise structure. In addition, a gap is formed in the connection portion between the external circulation duct 11 and the fermentation tank 3 according to the elapse of use, and the exhaust gas leaks to the outside. In addition, the conventional exhaust gas external circulation duct 11 has a problem that the exhaust gas circulation is not smooth because the exhaust gas circulation passage is relatively narrow in order to maintain its airtightness. In addition, the conventional food waste treatment apparatus has a problem in that an exhaust gas containing a malodorous substance is discharged into the inlet when the inlet is opened in order to inject the food waste into the fermentation tank, causing discomfort to the user. In particular, the odor emitted through the inlet is becoming a factor to reduce the reliability of the product.

Accordingly, the present invention has been made to solve the problems according to the prior art, the main object of the present invention by circulating the exhaust gas generated during the fermentation process of food waste in the fermentation tank to prevent the exhaust gas and odorous substances are discharged to the outside of the fermentation tank. To provide a food waste treatment apparatus.

In another aspect, the present invention provides a food waste treatment apparatus that can condense the water contained in the exhaust gas circulated in the fermenter to remove some to the outside and supply some to the fermenter to always maintain the water suitable for the growth of microorganisms. will be.

The present invention also provides a food waste treatment apparatus for supplying concentrated air from which nitrogen components have been removed into the fermenter to prevent oxygen deficiency from occurring due to inflow of unnecessary air (nitrogen).

In another aspect, the present invention is to provide a food waste treatment apparatus that does not generate odor even when food waste is introduced by forming an air curtain that prevents the release of exhaust gas and odor when the inlet is opened by opening the fermenter lid.                         

In order to achieve the above object of the present invention, the exhaust gas internal circulation food waste treatment apparatus according to the present invention, the body case of a predetermined size, and is installed inside the body case to accommodate food waste and decomposition medium and Food waste comprising a fermentation tank having a predetermined size to ferment, a stirrer installed inside the fermentation tank to mix food waste and decomposition medium by a predetermined driving means, and a heating device for maintaining the temperature inside the fermentation tank properly. In the processing apparatus,

It is installed inside the fermentation tank and circulates the exhaust gas generated in the fermentation process at the same time characterized in that it comprises an exhaust gas internal circulation and dehumidification device for condensing moisture contained in the high temperature and high humidity exhaust gas.

In the present invention, the exhaust gas internal circulation and dehumidification apparatus, the internal circulation duct installed in the fermentation tank for guiding the exhaust gas generated during the fermentation process; A circulation blower installed on an exhaust gas passage of the inner circulation duct to forcibly circulate the exhaust gas; A condenser installed on an exhaust gas passage of the inner circulation duct to condense moisture contained in the exhaust gas; It is configured to include a condensate collecting unit installed in the lower portion of the condenser to collect the condensed condensate and discharged to the outside or circulated back to the fermentation tank.

The inlet of the inner circulation duct is installed in the upper part of the fermentation tank so that the hot and humid exhaust gas naturally flows in, and the outlet of the inner circulation duct is installed in the middle or the lower part of the fermenter so that the low temperature dry exhaust gas can be supplied to the fermentation tank. It is characterized by.                         

The inner circulation duct is characterized in that it is fixed to any one or more of the top, rear and side of the inside of the fermenter.

The internal circulation duct may include any one of an upper surface, a rear surface, and a side surface of the fermenter to form a path of the exhaust gas.

A predetermined filter is installed at the inlet of the inner circulation duct so as to replace a foreign matter such as dust contained in the exhaust gas.

The condenser installed inside the inner circulating duct is provided to be orthogonal to the path of the exhaust gas, and is provided with a plurality of cooling pipes through which a predetermined refrigerant flows, and is installed perpendicularly to the path direction of the exhaust gas, It comprises a plurality of heat radiation fins in close contact.

The cooling pipe of the condenser flows outside air, cooling water or refrigerant that is cooler than hot and humid exhaust gas.

The water collecting unit is integrally formed on the bottom surface of the inner circulation duct so as to collect the condensed water falling from the condenser, and a drain pipe for discharging the collected condensate to the outside is installed at the bottom thereof.

A condensate nozzle for circulating a part of the condensate into the fermenter is further provided at the bottom of the water collecting unit.

The rear side of the condenser is provided with a circulating blower for sucking hot and humid exhaust gas toward the condenser and discharging the low temperature and dry exhaust gas passing through the condenser to the discharge side. The circulation blower is preferably a cross flow fan.                         

A concentrated air injection pipe for supplying external air or concentrated oxygen is installed between the circulation blower and the discharge portion of the internal circulation duct.

The concentrated oxygen supply device connected to the concentrated oxygen injection pipe includes a concentrated oxygen supply pump operated by a predetermined control unit, an oxygen concentrator connected to the concentrated oxygen supply pump and selectively removing nitrogen from air, and the concentrated oxygen supply And a check valve installed at the inlet pipe to prevent the exhaust gas from flowing back.

On the other hand, the condensate reservoir tank provided outside the fermentation tank for storing the condensate discharged from the water collecting unit, the water level measuring instrument for measuring the level of the condensate, the drain pipe installed on one side of the reservoir tank, and the water level meter interlocked And a drain valve for opening and closing the drain pipe.

In addition, the condensate storage tank has a condensate circulation pump for pumping condensate in the storage tank to supply into the fermentation tank, a condensate inlet pipe connected to one side of the fermenter to inject the pumped condensate into the fermentation tank, and through the condensate inlet pipe Check valves are provided to prevent backflow of exhaust gases.

An exhaust gas measuring sensor is installed at one side of the fermenter to measure gas concentration, humidity, and temperature of oxygen, carbon dioxide, and the like in the fermenter, and a condenser for measuring pH, electrical conductivity, etc., of the condensate. A measuring sensor is installed, and a water level measuring sensor is installed in the condensate storage tank, and a detection sensor is installed in the opening of the fermenter to detect whether a lid is opened or closed.

Food waste treatment apparatus according to the present invention is the circulation blower, concentrated oxygen according to the measured values such as oxygen concentration, carbon dioxide concentration, humidity, temperature and pH of the condensate, electrical conductivity measured by the exhaust gas measuring sensor and condensate measuring sensor A control unit for controlling the supply device, the condensate nozzle and the condensate circulation pump, agitator, heating device and the like is provided.

In addition, the food waste treatment apparatus according to the present invention is provided with an air curtain duct for guiding and injecting the low temperature dry exhaust gas discharged from the discharge portion of the inner circulation duct toward the inlet formed on one side of the fermentation tank.

In addition, a predetermined guide duct may be further installed at an inlet side of the inner circulation duct so as to smoothly receive the exhaust gas injected from the outlet of the air curtain duct and guide the inner circulation duct.

The inlet side of the air curtain duct is provided with a switching damper for switching the discharge direction of the low temperature dry exhaust gas, the outlet side of the guide duct is a low temperature dry exhaust gas injected through the air curtain duct, fermentation tank An intermittent damper may be further installed to interrupt the flow of the high temperature and high humidity exhaust gas generated in the air.

The outlet of the air curtain duct may be extended in the width direction of the inlet to increase the injection speed of the exhaust gas and cover the entire inlet.

The control unit forms an air curtain at the inlet by controlling the circulation blower, the switching damper and the intermittent damper according to the monitoring sensor installed at the inlet.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the waste gas internal circulation type food waste treatment apparatus according to the present invention.

First, Figure 3 is a schematic cross-sectional view showing the configuration of the food waste treatment apparatus inside the exhaust gas circulation according to the present invention. As shown, the food waste processing apparatus 10 of the present invention is a predetermined size for storing and fermenting food waste and decomposition medium is installed inside the main body case 20 of the predetermined size, and the main body case 20. Fermenter 30, the agitator 40 installed inside the fermenter 30 and mixing food waste and decomposition medium by a predetermined driving means, and heating to maintain the temperature in the fermenter 30 properly. An apparatus 70 and an exhaust gas internal circulation installed inside the fermentation tank 30 to condense and remove moisture contained in the high temperature and high humidity exhaust gas while circulating the exhaust gas generated during the fermentation process in the fermentation tank 30. And a dehumidifier 50.

The exhaust gas internal circulation and dehumidifier 50 is installed inside the fermentation tank 30 to form a predetermined exhaust gas flow path. The exhaust gas internal circulation and dehumidifier 50 is installed at an upper portion of the fermentation tank 30 so as to correspond to convection of high temperature and high humidity exhaust gas and low temperature dry exhaust gas. The condensed water removed through the exhaust gas internal circulation and the dehumidifier 50 is discharged to the outside through the condensate storage tank 120 installed outside the fermentation tank 30. In addition, the concentrated air corresponding to the amount of water removed is injected from the downstream of the exhaust gas internal circulation and dehumidifier 50 is supplied to the fermentation tank (30). In addition, a part of the condensate stored in the condensate storage tank 120 is supplied to the fermentation tank 30 through a condensate circulation pump 231. In addition, the low temperature dry exhaust gas discharged through the exhaust gas internal circulation and the dehumidifier 50 is supplied to the inlet through the air curtain duct 271 installed on the outer circumferential surface and the inner circumferential surface of the fermentation tank 30 in some cases. To form an air curtain.

4 to 6, a preferred embodiment of the exhaust gas internal circulation and dehumidifying apparatus 50 according to the present invention will be described. As shown, the exhaust gas internal circulation and dehumidifier 50 is installed in the fermentation tank 30, the predetermined internal circulation duct 51 for guiding the flow of the exhaust gas generated in the fermentation process, and A circulation blower (60) installed in the internal circulation duct (51) forcibly circulating the exhaust gas, a condenser (80) installed in the internal circulation duct (51) to condense moisture contained in the exhaust gas, and the condenser It is configured to include a condensate collecting unit 90 is installed in the lower portion of the 80 to collect the condensed water condensed, partly discharged to the outside and partly sprayed to the fermentation tank (30). At this time, the inlet 52 of the inner circulation duct 51 is installed on the upper side of the fermentation tank 30 so that the hot and humid exhaust gas is naturally introduced, the outlet 53 is a low temperature dry exhaust gas fermentation of the fermentation tank It is installed in the middle or lower portion of the fermentation tank 30 so that it can be naturally supplied with water.

Therefore, the high temperature and high humidity exhaust gas H generated in the fermentation tank 30 is forced into the exhaust gas internal circulation and the dehumidifier 50 in the circulation blower 60, and passes through the condenser 80. The hot and humid exhaust gas is cooled below the dew point to condense the moisture contained therein. And the low temperature dry exhaust gas (L) from which the moisture is removed is discharged back into the fermentation tank (30) by the circulation blower (60). As described above, since the exhaust gas generated in the fermentation tank 30 is circulated inside the fermentation tank 30, the exhaust gas does not leak to the outside of the fermentation tank 30. In addition, even if the exhaust gas leaks from the exhaust gas circulation and the dehumidifier 50, it does not leak outside the fermentation tank 30, so the exhaust gas circulation and the dehumidifier 50 do not necessarily have a gas tight structure.

Therefore, since the inner circulation duct 51 according to the present invention does not necessarily have a gastight structure, as shown in FIGS. 4 to 6, the upper surface 31a, the rear surface 31b, and the side surface 31c of the fermentation tank 30 are formed. It may be made of a structure containing. For example, FIG. 4 shows an example of an inner circulation duct 51 including an upper surface 31a and a rear surface 31b of the fermentation tank 30. The inner circulation duct 51 is composed of only a lower plate 51d and both side plates 51c of a predetermined shape, and a fixed flange 51e of a predetermined width is integrally formed along the upper edge of the side plate 51c. Therefore, the inner circulation duct 51 according to the present embodiment is fixed to the upper surface 31a and the rear surface 31b of the fermentation tank 30 through predetermined coupling means. In addition, reference numeral 51f is a curved plate installed around the circulation blower 60 to smoothly guide the flow of the exhaust gas.

FIG. 5 shows an example of an inner circulation duct 51 including both side surfaces 31c as well as an upper surface 31a and a rear surface 31b of the fermentation tank 30. The inner circulation duct 51 is formed of a lower plate 71d bent in a predetermined shape, and a fixed flange 51e of a predetermined width is integrally formed along an upper edge of the lower plate 571d. Therefore, the internal circulation duct 51 according to the present embodiment is fixed to the both sides 31c of the fermentation tank 30 through a predetermined coupling means. As described above, the internal circulation duct 51 of the present embodiment includes a top surface 31a, a rear surface 31b, and a side surface 31c of the fermentation tank 30, thereby having a simple structure. In addition, although the internal circulation duct 51 according to the present invention may be installed in various widths, in the case of the embodiment shown in FIG. 5, the width of the fermentation tank 30 and the width of the internal circulation duct 51 are the same.

On the other hand, the internal circulation duct 51 according to the present invention may be formed independently without any shaving inside the fermentation tank 30 as shown in FIG. In this case, the fixing flange 51e will be formed along both edges of the upper plate 51a. In addition, the internal circulation duct 51 of this type will be freely installed anywhere in the fermentation tank (30). However, in consideration of the convection of the exhaust gas, the internal circulation duct 51 is preferably installed on the upper surface 31a and the rear surface 31b of the fermentation tank 30.

The inner circulation duct 51 may be formed by bending and welding a metal having excellent chemical resistance and durability in a predetermined form, or may be made by injection molding with a synthetic resin material. In addition, the exhaust gas circulation duct 51 may further include a predetermined heat insulating material or heat insulating material layer to block heat transfer.

In addition, as shown in FIG. 7, the internal circulation duct 51 includes an inlet 52 through which hot and humid exhaust gas is introduced, a condenser 81 having a predetermined size where a predetermined condenser 80 is installed, and the condenser. Collecting unit 90 of a predetermined size to collect and store the condensate that is condensed and dropped in the 80, the blower 61 is provided with a circulating blower 60 for forcibly circulating the exhaust gas and the low-temperature dry exhaust gas (L) The discharge part 53 of a predetermined length for discharging the fermentation tank 30 is sequentially formed. At this time, the inlet 52, the filter 40 for removing the foreign matter, such as dust is installed replaceable, the outlet 53 is a predetermined length extending in the downward direction.

In addition, the condenser 81 has a cross section similar to the condenser 80 so that all the exhaust gas flowing through the inlet 52 passes through the condenser 80, and the water collecting unit 90 has the condenser 80. ) To collect the condensate falling from the outside part is discharged to the outside and part is bent in two stages to be supplied back to the fermentation tank (30), the condensate from the condenser 80 is circulated to the rear of the collecting unit (90) An inclined surface 63 having a predetermined height is formed so as not to flow into the blower 60, and the blower 61 has an appropriate shape according to the blower installed. For example, in the case of a cross flow fan, it is preferable to form a curved portion spaced a predetermined distance from the upper and lower portions of the blower 60 to smooth the flow of air.

 Subsequently, the condenser 80 installed in the condenser 81 is orthogonal to the plurality of cooling pipes 83 and the outer circumferential surface of the cooling pipe 83 which are spaced apart by a predetermined interval across the flow path of the exhaust gas. It is composed of a plurality of heat dissipation fins 84 provided in the flow direction of the exhaust gas. Therefore, the exhaust gas flowing into the inlet 52 of the inner circulation duct 51 is cooled in contact with the heat radiating fin 84 of the condenser 80. At this time, the heat radiation fins 84 are cooled below the dew point by a medium flowing along the inside of the cooling pipe 83. Therefore, the moisture contained in the high temperature and high humidity exhaust gas is in contact with the heat radiating fin 84 to condense.

On the other hand, the condenser 80 is provided with an air-cooled, water-cooled and refrigerant cooling system according to the type of medium supplied to the cooling pipe (83). For example, Figure 8 shows an air cooled cooling system having the simplest form. The air-cooled cooling system 100 has a plurality of cooling pipes 83 are installed in parallel, and both ends of the air-cooled condenser 180 is open to the outside air to blow the outside air into the cooling pipe (83) A supply blower 185 is provided, and the other side of the condenser 80 is provided with a discharge duct 186 for discharging the heat-exchanged air to the outside. Therefore, the cool air blown by the outside air supply blower 185 cools the heat dissipation fin 84 while passing through the inside of the plurality of cooling pipes 83 to heat heat from the hot and humid exhaust gas which is in contact with the heat dissipation fin 84. It is taken away. In this case, the outside air supply blower 185 may be installed only on one side of the condenser 80 or both sides depending on the processing capacity.

9 shows an example of a water-cooled cooling system, wherein the water-cooled cooling system 200 includes a cooling pipe 83 in a cooling pipe 83 of a water-cooled condenser 280 in which both ends of a plurality of cooling pipes 83 installed in parallel are zigzag-connected. A water circulation pump 283 is installed at one side of the water-cooled condenser 280 to allow the cooling water to flow, and a radiator 285 including a cooling blower 284 at the other side of the water-cooled condenser 280. Is installed. A cooling water storage tank 286 having a predetermined size is disposed between the radiator 285 and the water circulation pump 283. Therefore, the cooling water cooled by the radiator 285 is introduced into the cooling pipe 83 of the water-cooled condenser 280 through the cooling water storage tank 286 and the water circulation pump 283. Therefore, the cooling water supplied by the water circulation pump 283 cools the heat dissipation fin 84 while flowing inside the cooling pipe 83 to extract heat from the hot and humid exhaust gas contacting the heat dissipation fin 84.

10 shows an example of a refrigerant cooling system, wherein the refrigerant cooling system 300 includes the cooling pipe 83 on one side of the refrigerant condenser 380 in which a plurality of cooling pipes 83 are zigzag connected. Refrigerant condenser 383 is connected through a receiver 384, a dryer 385, and an expansion valve (capillary tube; 386), etc. to allow a cool refrigerant to flow therein, and a refrigerant condenser (380) on the other side. A refrigerant compressor 287 is provided for compressing the gaseous refrigerant having passed through). Therefore, the liquid refrigerant supplied from the refrigerant condenser 383 flows into the cooling pipe 83 of the refrigerant condenser 380 and then vaporizes, thereby cooling the heat radiating fin 84 to contact the heat radiating fin 84. The heat of the gas is taken away. The low-temperature and low-pressure gas refrigerant is compressed to a high-temperature, high-pressure gas refrigerant in the refrigerant compressor 386, and then circulated through the phase change from the refrigerant condenser 383 to a liquid refrigerant.

As described above, the condenser 80, 180, 280, 380 according to the present invention is cooled below the dew point by the various types of cooling system (100, 200, 300) to condense the moisture contained in the exhaust gas. And the condensed water falling from the condenser 80 is collected in the water collecting unit 90 formed in the lower portion. As shown in FIG. 8, the collecting part 90 is formed on the bottom surface 51d of the inner circulation duct 51. At this time, one side (one end) of the bottom surface of the water collecting part 90 is formed with a drain pipe 91 for discharging the collected condensate, and the drain pipe 91 for discharging the condensed water to the outside of the fermentation tank 30. A predetermined drain hose 92 is provided. In addition, a supply nozzle 93 for circulating the collected condensate into the fermentation tank 30 is provided at the other bottom (2 ends) of the water collecting unit 90. The supply nozzle 93 is preferably a spray for injecting condensate. In addition, the supply nozzle 93 is preferably installed more than to evenly spray the condensed water. At this time, the supply nozzle 93 is preferably provided with a small pulp (not shown) controlled by the control unit of the main body 20.

Subsequently, referring again to FIG. 3, the drain hose 92 is connected to the condensate water storage tank 120 installed outside the fermentation tank 20. Therefore, the condensed water discharged through the drain pipe 91 and the drain hose 92 of the water collecting unit 90 is discharged to the condensate storage tank 120. In addition, the condensate storage tank 120 is provided with a water level measuring instrument 122 (part) for measuring the level of condensate, and a valve 225 for opening and closing the drain pipe 124 in conjunction with the water level measuring instrument 122. Accordingly, the condensed water stored in the condensate storage tank 120 is intermittently discharged into the sewage pipe or the like into the condensate evaporator (not shown) according to the opening and closing of the valve 225 to be gradually evaporated. Meanwhile, the condensate storage tank 120 further includes a condensate supply device for supplying the stored condensate into the fermentation tank 30. The condensate water supply device 230 includes a condensate circulation pump 231 for pumping condensate into the fermentation tank and a circulation pipe 233 for guiding the condensate from the condensate water storage tank 120 into the fermentation tank 30. In this case, it is preferable that the circulation pipe 233 is provided with a check valve 234 for preventing backflow of exhaust gas from the fermentation tank 30 and an injection nozzle for injecting condensate. Accordingly, when the inside of the fermentation tank 30 is dried, the condensed water stored in the condensate storage tank 120 is supplied to the fermentation tank 30 again by the action of the condensate circulation pump 231.

On the other hand, the concentration tank injection pipe 331 for supplying the external air to the low-temperature dry exhaust gas (L) discharged by the circulation blower 60 is connected to the discharge portion 53 of the internal circulation duct (51). The concentrated oxygen injection pipe 331 is provided with a concentrated oxygen supply device 330 capable of supplying concentrated oxygen. For example, the concentrated oxygen supply device 333 is a concentrated oxygen supply pump 334 is connected to the concentrated oxygen injection pipe 331 through a predetermined check valve 332, It is configured to include an oxygen concentrator 440 is connected to the concentrated oxygen supply pump 334. The oxygen concentrator 440 includes an air filter 441 for filtering the impurities contained in the raw air, two adsorption beds 442 and 443 including a predetermined adsorbent (synthetic zeolite), and Separation valve 445 for switching the flow path so that the adsorption beds 442 and 443 receive alternately the pressure and the vacuum pressure of the raw air, and the nitrogen component adsorbed to the adsorption beds 442 and 443 is separated. Desorption vacuum pump 446 to make, a check valve 447 for flowing the concentrated oxygen in one direction, and the microtubes 448 connecting the upper end of each of the adsorption beds (442, 443) have.

Therefore, when the outside air is sucked through the air filter 441 and the switching valve 445, the switching valve 445 selects one of the two suction beds (442, 443), the suction air enters on one side The other side is subjected to a vacuum pressure by the removable vacuum pump 446. Accordingly, the adsorptive bed 442 in which the raw air is sucked adsorbs nitrogen and impurities, and oxygen having relatively low adsorptivity passes through the adsorptive bed 442, and the concentrated oxygen supply pump 334 and the concentrated oxygen injection pipe 331. It is injected into the discharge portion 53 of the inner circulation duct 51 through. In this way, the present invention by supplying the concentrated air concentrated by the oxygen concentrator 440 unnecessarily excessive positive (+) pressure is formed in the fermentation tank 30 by the external air having a low oxygen concentration, thereby supplying oxygen It is not smooth and can prevent the occurrence of oxygen deficiency.

Then, as shown in Figure 12 to 14, the food waste treatment apparatus according to the present invention is formed on one side of the fermentation tank 30, the low-temperature dry exhaust gas discharged from the discharge portion 53 of the inner circulation duct 51 An air curtain duct 271 for guiding toward the inlet 25 and ejecting at high speed is provided. As shown, one side of the air curtain duct 271 is connected to the discharge portion 53 of the inner circulation duct 51, the other side is provided to be located below the inlet (25). And the air curtain duct 51 is installed so as to surround the outer peripheral surface of the fermentation tank 30 is installed to penetrate into the fermentation tank 30 from the front of the fermentation tank 30. In addition, the inlet side of the air curtain duct 271 is provided with a switching damper 273 for switching the flow of exhaust gas. Therefore, under the control of the switching damper 273, the low temperature dry exhaust gas discharged from the internal circulation duct 51 flows into the air curtain duct 271 and is guided to the lower side of the inlet 25 and then the inlet ( It is possible to form a predetermined air curtain for the inlet by rapidly spraying to the upper side of 25).

When the inlet port 25 and the inlet part 52 of the inner circulation duct 51 are spaced apart from each other, the exhaust gas injected from the outlet port 274 of the air curtain duct 271 is received to receive the inner circulation duct. A predetermined guide duct 371 may be further installed to guide to the 51. That is, the inlet 373 of the guide duct 371 is installed close to the upper side of the inlet 25 and the outlet 374 of the guide duct 371 is the inlet 52 of the inner circulation duct 51. Installed close to In this case, the inlet 373 of the guide duct 371 is formed to have a width similar to that of the inlet 25. In addition, the guide duct 371 is formed at a height sufficient to accommodate the exhaust gas injected from the air curtain duct 271. In addition, the outlet 374 of the guide duct 371 is formed with a similar width of the inlet 52 of the inner circulation duct 51. In addition, the outlet 374 of the internal circulation duct 51 is provided with an intermittent damper 376 to control the flow of the exhaust gas is sucked. That is, the intermittent damper 376 regulates the flow of the low temperature dry exhaust gas injected through the air curtain duct 271 and the high temperature and high humidity exhaust gas generated in the fermentation tank 30. The switching damper 273 and the intermittent damper 376 as described above are driven by a predetermined motor, which is controlled by the control unit 21 of the main body 20.

Therefore, when a user opens the lid 28 of the inlet port 25 to inject food waste, the air curtain duct 271 under the control of the control unit 21 is interlocked with the sensor installed in the inlet port 25 The switching damper 273 provided at the inlet side of the c) is rotated in a predetermined direction to guide the low temperature dry exhaust gas toward the air curtain duct 271. At this time, since the discharge portion 53 of the inner circulation duct 51 is in a closed state, all the exhaust gas is introduced into the air curtain duct 271. At the same time, the rotational force of the circulating blower 60 is increased, and the moving speed of the exhaust gas is also increased. In addition, the intermittent damper 376 provided at the outlet side of the guide duct 371 is also rotated in a predetermined direction to block the flow of the exhaust gas sucked into the fermentation tank 30.

Accordingly, the exhaust gas forcibly circulated by the circulation blower 60 passes through a continuously closed circulation (a kind of closed circuit) through the air curtain duct 271, the guide duct 371, and the inner circulation duct 51. To form. At this time, since the high temperature and high humidity exhaust gas generated in the fermentation tank 30 does not flow into the internal circulation duct 51, the closed circuit is composed of only low temperature dry exhaust gas. In addition, since the exhaust gas injected through the discharge port 274 of the air curtain duct 271 flows quickly through the space of the inlet port 25 and enters the inlet 373 of the guide duct 371, the inlet port 25 ) Is a predetermined air curtain (Air curtain) is formed. When such an air curtain is formed, even when the lid 28 of the inlet 25 is opened, the hot dry exhaust gas inside the fermentation tank 20 is not discharged to the outside through the inlet 25. Therefore, it is possible to fundamentally solve the problem of odor generated when the food waste is introduced in the conventional food waste processing apparatus.

In addition, the inlet 52 of the inner circulation duct 51 is provided with a sensor (S1) for measuring the oxygen, temperature and humidity of the exhaust gas, the collecting unit 90, the condensed water properties, for example For example, a sensor (S2) for measuring pH, electrical conductivity and the like is provided, the inlet 25 is provided with a monitoring sensor (S3) for monitoring the opening and closing of the lid. These sensors S1, S2, and S3 are electrically connected to a control unit 21 for controlling the food waste processing apparatus as a whole. Therefore, the control unit 21 according to the properties of the oxygen, humidity, temperature and condensed water measured by these sensors, the circulation blower 60, concentrated oxygen supply device 330, condensate water supply nozzle 84, condensate water circulation pump ( 231, the heating device 70, the stirrer 40, and the dampers 273, 376.

Hereinafter will be described the operation of the waste gas internal circulation type food waste treatment apparatus according to the present invention.

First, the food waste introduced through the inlet 25 is agitated by the stirrer 40 in the fermentation tank 30 maintaining a predetermined temperature by the heating device 70 and mixed with the fermentation medium. In addition, an environment in which the fermentation strain may be activated by oxygen and water supplied by the concentrated oxygen supply device 330 and the condensate water supply device 320 is provided. Under these circumstances, the fermentation strains ferment and decompose food waste into nutrients. As a result, food waste is converted into steam (85 to 95%), exhaust gas and a predetermined amount of solids (1 to 5%). At this time, the high temperature and high humidity exhaust gas containing water vapor and odorous substances are moved to the upper portion of the fermentation tank 30 by convection, and are sucked by the blower 60 of the internal circulation duct 51 and pass through the filter 45. Reach the condenser 80.

Subsequently, the high temperature (40 to 60 ° C.) exhaust gas reaching the condenser 80 is in contact with the heat radiation fin (84) fin of the condenser 80 in a low temperature (7 to 35 ° C.) state and is included in the exhaust gas. Water vapor is cooled to dew point temperature and condensed. Then, the condensed water vapor becomes a droplet state and flows down along the surface of the heat dissipation fan 84 of the condenser. At this time, part of the carbon dioxide contained in the exhaust gas passing around is dissolved in the condensed water. And the condensed water is collected in the water collecting unit 90 installed in the lower portion of the condenser 80.

A part of the condensate collected by the water collecting unit 90 is discharged to the outside through the drain pipe 91 and the drain hose 92 and a part is directly supplied to the fermentation tank 30 through the condensate supply nozzle 93. That is, when the humidity inside the fermentation tank 30 is low, the condensed water is circulated internally through the supply nozzle 93 of the water collecting unit 90. On the other hand, when the humidity inside the fermentation tank 30 is high, the condensate water storage tank 120 installed outside the fermentation tank 30 is discharged through the drain pipe 91 and the drain hose 92. In addition, the condensate stored in the condensate storage tank 120 is periodically discharged to the outside by the drain valve 124 that is interlocked with the level gauge 122. On the other hand, when the humidity inside the fermentation tank 30 is very low or in particular need to supply water into the fermentation tank 30, the condensate stored in the condensate storage tank 120 through the condensate circulation pump 231 fermentation tank (30) Cycles).

On the other hand, the dry exhaust gas passing through the condenser 80 is discharged to the fermentation tank 30 by the circulation blower (60). At this time, the exhaust gas discharged to the fermentation tank 30 is injected with a predetermined amount of concentrated oxygen to correspond to the amount of moisture removed. Therefore, the exhaust gas injected into the fermentation tank 30 together with the concentrated oxygen supplies oxygen to the fermentation and decomposition of the fermentation strain, and odorous substances contained in the exhaust gas are gradually decomposed by the action of the fermentation strain. This exhaust gas internal circulation is repeated until the fermentation decomposition of food waste is completed or for a predetermined time. When the oxygen concentration in the fermentation tank 30 is detected by the sensor S1 in the fermentation tank during this series of processes, the controller 21 controls the concentrated oxygen supply device 333 to automatically supply concentrated oxygen (fresh air). Supply it.                     

In addition, when the user opens the inlet 25 of the fermentation tank to inject food waste, the air curtain duct 271 under the action of the control unit 21 in conjunction with the sensor (S3) installed in the inlet (25). The switching damper 273 provided at the inlet side of the inlet is rotated in a predetermined direction, and the intermittent damper 376 provided at the outlet side of the guide duct 371 is also rotated in a predetermined direction, so that the low-temperature dry exhaust gas is directed toward the air curtain duct 271. Inflow is continuously circulated through the air curtain duct 271, the guide duct 371, and the inner circulation duct 51 to form a predetermined air curtain in the inlet. Therefore, even when the food waste is opened by opening the lid 28 of the inlet 25, the hot dry exhaust gas inside the fermentation tank 30 is not discharged to the outside through the inlet 25. Accordingly, it is possible to fundamentally solve the problem of odor generation, which was the most problematic in the conventional food waste treatment apparatus.

As described above, the waste gas internal circulation food waste treatment apparatus according to the present invention, by installing the exhaust gas internal circulation and dehumidification apparatus in the fermentation tank, while circulating the exhaust gas generated during the fermentation process in the fermentation tank to the exhaust gas Condensation and removal of the moisture contained in the circulating odorous substances are decomposed by aerobic microorganisms in the decomposition tank, so no exhaust gas and odor are released to the outside of the fermentation tank.

In addition, the present invention condenses the moisture contained in the high-temperature humid exhaust gas through the internal circulation and dehumidification apparatus of the exhaust gas inside the fermentation tank to remove some to the outside and supply some to the fermenter to supply the moisture suitable for the growth of microorganisms. It is always effective.

The present invention also has an effect that can prevent the lack of oxygen caused by the inflow of unnecessary air (nitrogen) by supplying the concentrated air in which nitrogen components have been removed into the fermenter fermenter.

In another aspect, the present invention can provide a food waste treatment apparatus that does not generate odor even when food waste is introduced by forming an air curtain that prevents the release of exhaust gas and odor when the inlet is opened by opening the fermenter lid.

In addition, since the exhaust gas internal circulation and the dehumidifying apparatus according to the present invention is installed inside the fermentation tank, the structure is simple, and thus the production cost can be reduced, and the maintenance cost can be reduced because the deodorizing device is not provided as in the prior art.

Claims (20)

A main body case of a predetermined size, a fermentation tank of a predetermined size installed inside the main body case for storing and fermenting food waste and a decomposition medium, and a food waste and decomposition medium system installed in the fermentation tank by a predetermined driving means. In the food waste processing apparatus comprising a stirrer for mixing the, and a heating device for maintaining the temperature inside the fermentation tank properly, Installed inside the fermentation tank circulates the exhaust gas generated in the fermentation process at the same time exhaust gas internal circulation system characterized in that it comprises an exhaust gas internal circulation and dehumidification device to condense the moisture contained in the high temperature and high humidity exhaust gas Food waste disposal device. The method of claim 1, The exhaust gas internal circulation and dehumidifier includes an internal circulation duct installed inside the fermentation tank to guide the exhaust gas generated during the fermentation process; A circulation blower installed on an exhaust gas passage of the inner circulation duct to forcibly circulate the exhaust gas; A condenser installed on an exhaust gas passage of the inner circulation duct to condense moisture contained in the exhaust gas; Installed in the lower part of the condenser to collect the condensed condensate water discharged to the outside or back to the fermentation tank comprising a condensate water collecting unit, characterized in that the exhaust gas internal circulation food waste processing apparatus, characterized in that configured. The method of claim 2, Wherein the water collecting unit waste gas internal circulation type food waste treatment apparatus, characterized in that formed in the bottom surface of the inner circulating duct. The method of claim 2, The inlet of the inner circulation duct is installed in the upper part of the fermentation tank so that the hot and humid exhaust gas naturally flows in, and the outlet of the inner circulation duct is installed in the middle or the lower part of the fermenter so that the low temperature dry exhaust gas can be supplied to the fermentation tank. Food waste treatment apparatus in the exhaust gas internal circulation method characterized in that it becomes. The method of claim 2, The internal circulation duct is an exhaust gas internal circulation type food waste treatment apparatus, characterized in that fixed to at least one of the top, rear and side of the inside of the fermentation tank. The method of claim 2, The internal circulation duct includes an exhaust gas internal circulation type food waste treatment apparatus, including any one of an upper surface, a rear surface, and a side surface of the fermenter. The method of claim 2, And a predetermined filter for removing foreign matters such as dust contained in the exhaust gas at an inlet of the internal circulation duct. The method of claim 2, The condenser installed inside the inner circulating duct is provided to be orthogonal to the path of the exhaust gas, and is provided with a plurality of cooling pipes through which a predetermined refrigerant flows, and is installed perpendicularly to the path direction of the exhaust gas, Food waste treatment apparatus in the exhaust gas internal circulation method comprising a plurality of heat radiation fins in close contact. The method according to claim 2 or 3, The water collecting part is integrally formed at the bottom of the inner circulation duct so as to collect the condensate falling from the condenser, and at the bottom there is a drain pipe for discharging the collected condensate to the outside and a condensate nozzle for circulating a part of the condensate into the fermenter. Food waste treatment apparatus in the exhaust gas internal circulation method, characterized in that installed. The method of claim 2, The rear side of the condenser is provided with a circulating blower for sucking hot and humid exhaust gas toward the condenser and discharging the low temperature dry exhaust gas passing through the condenser to the discharge side, and between the circulating blower and the discharge portion of the internal circulation duct. Or an exhaust gas internal circulation type food waste treatment apparatus, characterized in that the concentrated air injection pipe for supplying concentrated oxygen is installed. The method of claim 2, The concentrated oxygen supply device connected to the concentrated oxygen injection pipe includes a concentrated oxygen supply pump operated by a predetermined control unit, an oxygen concentrator connected to the concentrated oxygen supply pump and selectively removing nitrogen from air, and the concentrated oxygen injection pipe. The waste gas internal circulation type food waste processing apparatus, comprising a check valve installed in the exhaust gas to prevent backflow of the exhaust gas. The method according to claim 2 or 3, The condensate water storage tank provided on the outside of the fermentation tank for storing the condensate discharged from the water collection unit, the water level measuring instrument for measuring the level of the condensate, the drain pipe provided on one side of the water storage tank, the water level meter in conjunction with the Food waste treatment apparatus in the exhaust gas internal circulation method comprising a drain valve for opening and closing the drain pipe. The method of claim 12, The condensate storage tank includes a condensate circulation pump for pumping condensate in the storage tank and supplying the condensate into the fermentation tank, a condensate inlet pipe connected to one side of the fermentation tank for injecting the pumped condensate into the fermentation tank, and exhausted through the condensate inlet pipe. Food waste treatment apparatus in the exhaust gas internal circulation method characterized in that the check valve is installed to prevent the back flow of gas. The method of claim 2, An exhaust gas measuring sensor is installed at one side of the fermenter to measure gas concentration, humidity, and temperature of oxygen and carbon dioxide in the fermenter, and the condenser is measured at the collecting part to measure pH, electrical conductivity, etc. of condensate. Sensor is installed, the condensate water storage tank is a water level measuring sensor is installed, the waste gas internal circulation type food waste processing apparatus, characterized in that a sensor for detecting the opening or closing of the lid is installed in the opening of the fermenter. The method according to claim 2 or 14, The circulation blower, the concentrated oxygen supply device, the condensate nozzle and the condensate circulating pump according to the measured oxygen concentration, carbon dioxide concentration, humidity, temperature and pH of the condensate, electrical conductivity measured by the exhaust gas measuring sensor and the condensate measuring sensor , An exhaust gas internal circulation food waste treatment apparatus comprising a control unit for controlling a stirrer and a heating device. The method according to claim 1 or 2, An air curtain duct for guiding and injecting the low temperature dry exhaust gas discharged from the exhaust gas internal circulation and the dehumidifier or the internal circulation duct toward the food waste inlet formed at one side of the fermentation tank is further installed. Circulation-type food waste treatment device. The method of claim 16, The inlet side of the exhaust gas internal circulation and dehumidifier or the internal circulation duct can smoothly receive the exhaust gas injected from the outlet of the air curtain duct to guide the exhaust gas internal circulation and dehumidifier or the internal circulation duct. Food waste treatment apparatus in the exhaust gas internal circulation method characterized in that the guide duct is further installed. The method of claim 16, An exhaust gas internal circulation type food waste treatment apparatus is installed at an inlet side of the air curtain duct to change a discharge direction of the low temperature dry exhaust gas. The method of claim 17, The internal circulation of the exhaust gas is further installed at the outlet side of the guide duct, and an intermittent damper is provided to control the flow of the low temperature and dry exhaust gas injected through the air curtain duct and the hot and humid exhaust gas generated in the fermentation tank. Anticorrosive food waste treatment device. The method of claim 16, The discharge port of the air curtain duct is an exhaust gas internal circulation type food waste processing apparatus, characterized in that it is extended in the width direction of the inlet to increase the injection speed of the exhaust gas and cover the entire inlet.

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