KR100261313B1 - Food wastes disposal - Google Patents

Abstract

PURPOSE: Provided are a method for processing kinds of food wastes fermenting the wastes by inoculating microorganism and the apparatus, which prevents air pollution by gas generated from the fermenting process and promotes the ferment efficacy without extra heating device. CONSTITUTION: The method includes the following steps of: (i) condensing gas generated from a waste fermenting process to remove impurities included in the gas by cold air supplied from the outside; (ii) purifying the gas by burning up the gas at high temperature; (iii) repurifying the gas by using an activated carbon layer; (iv) recirculating the gas to maintain the temperature inside the ferment chamber by supplying the gas to the outside of the chamber; (v) heat exchanging to increase the temperature of the air supplied into the ferment chamber to a fixed degree by passing the gas through circular path. The apparatus comprises a ferment chamber formed in an outer container body, a stirring device horizontally installed in the ferment chamber, a condensation chamber where gas generated from the ferment chamber are passed through in zigzags, a condensing device having a plurality of circular path horizontally installed in the condensation chamber to supply outer air, a first purification device for burning up the gas flowed from the compression device with a heater, a second purification device for passing the gas flowed from the first device through the activated carbon body to repurify the gas, a recirculating device for circulating the gas in a circular chamber formed at the outer circumference of the outer container, and a heat exchanger having a plurality of circular path vertically installed in an air heating chamber placed in the outer container.

Description

Food waste treatment method and device

The present invention relates to a treatment method and apparatus for inoculating microorganisms by inoculating microbial foods to fermentation, in particular, to increase the fermentation efficiency by smoothly supplying air and purifying and cooling the gas generated during the fermentation process by heat-exchanging and cooling the gas. The present invention relates to a food waste treatment method and apparatus for efficiently purifying a gas by burning at a high temperature.

In general, food wastes generated at home or restaurants become the main cause of river pollution when discharged into rivers through sewers, and even when collected in garbage bags and landfilled on land, various germs are generated with deterioration and severe odors. It became the main cause of environmental pollution.

As such, the treatment of food waste has emerged as a serious social problem. In recent years, many methods for recycling food waste, which are pulverized into small particles, inoculated with microorganisms, fermented at an appropriate temperature, and recycled as feed or fertilizer have been developed. It is becoming.

As one of the food waste treatment methods described above, a "food waste treatment method and apparatus" (patent application No. 96-760) filed by the present applicant has been developed, and this prior invention has a finer food waste. A crushing step of pulverizing the particles, a dehydration step of removing moisture by putting the food crushed in the crushing step into a dehydrator, and adding food dehydrated in the dehydration step to a stirrer and mixing with sawdust to which microorganisms are added. The fermentation process is carried out in sequence to ferment and destroy food waste.

The above-described invention has the effect of uniformly treating the grinding, dehydration, and fermentation processes, but has raised a problem that the oxygen supply is not smooth and the exhaust gas is not purified in the fermentation process. That is, microorganisms are inoculated in the stirring process, and activation of these microorganisms is facilitated when the oxygen supply is made smoothly, but the selection is that oxygen in the atmosphere is supplied during the mixing process by the wing pieces on which the food waste is rotated. Since it does not supply enough oxygen, the activation of microorganisms is delayed, and as a result, the fermentation time is delayed and the fermentation efficiency is lowered.

In addition, in the fermentation process, the gas is generated during the process of mixing the food residue at a high temperature state of the appropriate level, such gas is a bad smell and causes various environmental germs when released in the atmosphere as it is caused by environmental pollution It was configured to go through the incineration process through the heating device, but this was not enough because of the complete combustion by the heater when a large amount of gas passes at a time, the purification efficiency was insufficient.

That is, since the heater is installed on the outer circumferential surface of the outlet, the gas passed to the outer circumferential surface side of the outlet has a high combustion efficiency, while the gas passed to the central side of the outlet does not transmit heat of the heater, so that it is not completely purified. To the atmosphere.

Further, as a means for purifying the gas generated during the fermentation process, there is an exhaust gas purifying apparatus for treating food waste (patent application No. 96-33398) filed by the applicant.

In order to remove impurities contained in the gas generated in the stirrer for fermenting the food waste, the above-described invention has a purification passage in which a plurality of pipes are connected to the upper and lower zigzag, and an exhaust pipe is connected to the outlet side, and an inlet side of the purification passage. It consists of a moisture removal member connected between the outlet side of the stirrer, a watering device for injecting the washing water into the tubular body of the purification passage, and a reservoir installed to penetrate below the purification passage, the gas generated in the exchanger The impurities can be removed by washing water.

However, the above invention has raised a problem that smooth circulation is not made because the circulation of the gas is resisted by the sprinkler because the sprinkling device is installed in the vertical direction between each tube formed by the zigzag. It required a lot of manpower and time to install. In particular, the circulation of the gas is zigzag along the connecting passage formed above and below, but the washing water is injected in the left and right directions, so the impurity contained in the gas is not removed smoothly by the washing water, and the rate of passage of the gas is high. In order to increase the external appearance of the purification device to secure more relations, the purification device of the present invention has a problem that the purification efficiency per unit area is lowered.

The present invention is to solve the above problems, by removing the moisture and impurities contained in the gas by condensing the gas generated during the fermentation process of food waste by low temperature external air by the primary and secondary purifying member Its purpose is to ensure complete purification.

Another object of the present invention is to recycle the heat source to be discarded by recycling the hot gas discharged to the fermentation chamber to maximize the treatment efficiency.

1 is a side cross-sectional view showing the overall configuration of the present invention.

2 is an enlarged cross-sectional view showing the condensing means of the present invention.

Figure 3 is an enlarged cross-sectional view showing a first purification member and a second purification member of the present invention.

Figure 4 is an enlarged cross-sectional view showing a heat exchange means of the present invention.

* Explanation of symbols for main parts of the drawings

M: stirring member C: condensing means

F1: first purifying member F2: second purifying member

R: Recirculation means H: Heat exchange means

1: outer cylinder 2: fermentation chamber

12 condensation chamber 12a inlet

12b: outlet 13: air circulation path

14 bulkhead 15 passage

16: left and right bulkhead 17a: air outlet

17b: air inlet 18: air passage

19: blower 31a: primary circulation room

31b: secondary circulation chamber 32: electronic variable valve

42: air heating chamber 43: gas circulation path

44a: gas inlet chamber 44b: gas inlet chamber

45: bulkhead 46: gas passage

47: Hita

In order to achieve the above object, in the food waste treatment method of inoculating microorganisms by inoculating microorganisms at a predetermined temperature after dehydrating food wastes, the gas generated during the fermentation process is passed through cold air supplied from the outside. Condensation to remove moisture and impurities contained in the gas, a first purifying process of burning the gas passed in the condensation process at a high temperature, and purifying the gas passed through the first purifying process by the activated carbon layer. A second purification process, a recirculation process for supplying a high temperature gas passed through the second purification process to the outside of the fermentation chamber of the fermentation process to maintain the fermentation chamber at an appropriate temperature, and a plurality of pipes passing the gas passed through the recirculation process While passing through the furnace to proceed with a heat exchange process for raising the air supplied into the fermentation chamber to an appropriate temperature It is characterized by.

Apparatus for implementing the above-mentioned food waste treatment method, in a known fermentation apparatus installed in the fermentation chamber formed in the outer cylinder in the left and right length direction, passing the gas generated in the fermentation chamber in the upper and lower zigzag and at the same time up and down Condensation means for condensation of moisture contained in the gas by allowing the external cold air to be supplied to a plurality of circulation paths formed in the furnace, and a ceramic heated to high temperature by a heater to burn the foreign matter contained in the gas discharged from the condensation means A first purifying member through which gas passes through the first purifying member, a second purifying member through which the gas passed through the first purifying member passes through the activated carbon, and purifying again, and a gas discharged from the second purifying member on the outer wall of the fermentation chamber. Recirculation chamber for passing the hot gas as a heat source and a plurality of gases passed through the recirculation chamber After passing through the circulation pipe of the cold air supplied to the outside by the heat of the gas is characterized in that it is provided as a heat exchange means for supplying the inside of the fermentation chamber.

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

Figure 1 is a side cross-sectional view showing the overall configuration of the present invention, Figure 2 is an enlarged cross-sectional view showing the measuring means of the present invention, Figure 3 is an enlarged cross-sectional view showing the first purification member and the second purification member of the present invention, 4 is an enlarged cross-sectional view showing the heat exchange means of the present invention.

As shown in FIG. 1, the present invention provides a fermentation means (B) having a stirring member and a fermentation chamber therein, and a condensation means (C) connected to an exhaust outlet of the fermentation chamber and provided with a plurality of air passages therein. And a first purifying member F1 connected to the outlet of the condensation means C, a second purifying member F2 connected to the outlet of the first purifying member F1, and a fermentation chamber outer circumferential surface of the fermentation means. And a recirculation chamber (R) connected to the outlet of the second purifying member, and a gas circulation path formed therein by being connected to the outlet of the recirculation chamber (R) and connected to an air outlet of the condensation means (C). ), And the outlet of the heat exchange means (H) is connected to the fermentation chamber of the fermentation means (B).

The fermentation means (B) is provided with a fermentation chamber (2) inside the cylindrical outer cylinder (1) is equipped with a stirring member (M) in the left and right length direction inside the fermentation chamber (2).

The stirring member (M) is fixed to a plurality of support rods (4) on the rotating shaft (3) provided in the fermentation chamber (2) in the left and right direction to form a plate-shaped stirring blade (5) at the end of the support rod (4) By attaching one end of the rotation shaft 3 to the drive shaft 6a of the reduction motor 6 and rotating the rotation shaft 3 by the operation of the reduction motor 6. ) Is configured to mix evenly the food residue in the fermentation chamber (2) as a circular motion.

The condensation means (C) is a plurality of air circulation paths (13) in the condensation chamber 12 formed in the outer cylinder 11, a plurality of devices in the right and left length direction, partition wall 14 provided in the vertical direction in the center portion The inlet portion 12a and the outlet portion 12b are divided into the inlet portion 12a and the outlet portion 12b of the condensation chamber 12 by the passage 15 formed below the partition wall 14. The apparatus is configured to communicate with each other, and the gas circulation pipe P1 is connected to the upper side of the inlet 12a and the gas circulation pipe P2 is connected to the upper side of the outlet 12b.

In addition, the air outlet part 17a and the air inlet part 17b which are divided up and down by the left and right partition 16 at one side part of the air circulation path 13 are comprised, respectively, and the air passage part is in the other side of the air circulation path 13. (18), the air inlet pipe (A1) connected to the blower (19) is connected to the air inlet (17b) and the air circulation pipe (A2) in communication with the second heat exchanger (H) is an air outlet It enters (17a).

In addition, the condensate chamber 12 constitutes a collecting chamber W in which condensed water is collected, and a condensate discharge pipe 12c is connected to one side of the collecting chamber W to discharge the collected condensed water.

The first purifying member F1 forms an exhaust path 22 in the inner center of the cylindrical cylinder 21, and installs a heat transfer heater 23 in a coil shape on the outer circumferential surface of the exhaust path 22, The inlet side of the exhaust passage 22 is connected in communication with the gas circulation pipe P2 and the gas circulation tube P3 is connected in communication with the outlet side of the exhaust passage 22.

The second purifying member F2 forms the exhaust passage 25 inside the cylindrical cylinder 24 to stack the filter body 26 made of activated carbon in the exhaust passage 25 in multiple stages, and the exhaust passage 22. ) Is connected in communication with the gas circulation pipe (P3) and the outlet side of the exhaust passage 22 is connected to the gas circulation pipe (P4) so as to communicate with the recirculation chamber (R).

The recirculation means (R) forms a primary circulation chamber (31a) above the outer cylinder (1) of the fermentation means (B), and forms a secondary circulation chamber (31b) below the outer cylinder (1), respectively. The gas circulation pipe P4 is connected in communication with the inlet side of the primary circulation chamber 31a and the gas circulation pipe P5 is connected in communication with the outlet side of the primary circulation chamber 31a, and the gas circulation pipe P5 is connected. The electronic variable valve 32 is attached to the valve.

In addition, each of the gas circulation pipes P6 and P7 is connected to the electronic variable valve 32 to connect the circulation pipe P6 on one side to communicate with the secondary circulation chamber 31b, and to connect the gas circulation pipe P7 on the other side. It is connected to the gas circulation pipe (P1) in communication with the heat exchange means (C).

In addition, the gas circulation pipe P8 connected to the outlet side of the secondary circulation chamber 31b is connected to the gas circulation pipe P7.

In addition, the heat medium liquid part 33 is formed in the boundary wall of the secondary circulation chamber 31b and the fermentation chamber 2.

The heat exchange means (H), the air formed in the outer cylinder (41) forms a plurality of gas circulation paths 43 in the longitudinal direction in the heat chamber 42, the gas inlet chamber on the upper side of the gas circulation path 43 The 44a and the gas outlet chamber 44b are formed to be divided into the left and right sides by the partition wall 45, and the gas passage 46 is formed in the lower side of the gas circulation path 43, and it communicates with the gas inflow chamber 45a. In order to connect the circulation pipe (P7) and to connect the exhaust pipe (P9) in communication with the gas outlet chamber (44b).

Further, the air circulation pipe A2 connected to the condensation means C is connected to the inlet side of the air heating chamber 42, and the fermentation chamber 2 of the fermentation means B is connected to the outlet side of the air heating chamber 42. ) Is connected to the air circulation pipe (A3) and the heater 47 is installed in the air circulation pipe (A3).

Referring to the effects of the present invention configured as described above are as follows.

After inoculating microorganisms in which fermented food debris is contained in a predetermined amount, and inoculating microorganisms, when food debris starts to ferment by microorganisms, blower 19 is operated to supply air of appropriate temperature to fermentation chamber 2. At the same time by operating the stirring member (M) is repeatedly carried out the process of continuously mixing food residues.

In the initial operation of the apparatus of the present invention, by the operation of the blower 19, the external cold air is supplied to the fermentation chamber 2 through the condensation means (C) and the heat exchange means (H), wherein the external cold air is fermentation chamber If it enters (2) as it is, the activity of the microorganisms is reduced, so that the activation of the microorganisms while sensing the temperature of the air passing through the heater 47 by a temperature sensor (not shown in the drawing) installed inside the heater 47. If the temperature is 50 ~ 60 ℃ or less, the heater 47 is operated so that the air is heated by the air flowing into the fermentation chamber (2) through the air circulation pipe (A3) to promote the activation of microorganisms to improve the efficiency of the foot As the stirring member (M) is rotated by the reduction motor (6), the food waste is evenly mixed by the stirring blade (5), so that smooth air is supplied to the food waste.

The heater 47 is operated when the temperature of the air to be passed is below the appropriate temperature to heat the air and does not operate when the temperature of the air is above the proper temperature, the device of the present invention is activated and generated in the fermentation chamber (2) When the fermentation chamber 2 is at an appropriate temperature due to the circulation of the gas, the operation of the heater 47 is not necessary.

In the fermentation chamber (2), gas is generated during the fermentation of food waste by the microorganisms, and the gas becomes a high temperature state.

The gas is introduced into the condensation means C through the gas circulation pipe P1. The gas introduced into the condensation means (C) is moved downward through the inlet (12a) and then raised through the passage (15) to be discharged to the gas circulation pipe (P2) through the outlet (12b).

In addition, the external cool air introduced into the outer cylinder 11 through the air inlet pipe A1 by the operation of the blower 19 is supplied to each air circulation path 13 located below the air inlet 17b. Passed through the air passage (18) while being delayed to the air outlet (17a) through the respective air circulation path 13 located in the upper portion is discharged to the heat exchange means (H) through the air circulation pipe (A2) will be.

Therefore, while the external cool air passes through each of the air circulation paths 13 installed in the condensation chamber 12, the hot gas generated in the fermentation chamber 2 passes through the space in the condensation chamber 12, thereby providing high temperature. The gas is condensed with the moisture contained in the gas as the heat exchange with the low-temperature air, the condensate is collected in the lower collecting chamber (W) after agglomerated on the outer peripheral surface of the air circulation.

By the action of the condensation means (C) there is an effect that the moisture contained in the gas is removed at the same time as impurities contained in the condensed water.

The gas introduced into the first purifying member F1 from the condensation means C through the gas circulation pipe P2 is 800 ° C. or more by the heat transfer heater 23 that generates heat at a high temperature while passing through the exhaust passage 22. As it is heated, the impurities contained in the gas are burned and primary purification is performed.

Again, the gas introduced into the second purifying member F2 through the gas circulation pipe P3 remains in the gas while passing through the exhaust passage 25 through the micropores of the filter body 26 of activated carbon. The material is removed.

Therefore, since the impurities contained in the gas are removed while the gas passes through the first purifying member F1 and the second purifying member F2, the gas circulation tube is purged in a state in which harmful substances and odors are completely removed. It is introduced into the recirculation means (R) through (P4).

The gas introduced into the recirculation means R through the first and second purifying members F1 and F2 heat exchanges with the inside of the fermentation chamber 2 so that the inside of the fermentation chamber 2 is raised to an appropriate temperature of 40 to 60 ° C. After playing a role of flowing out to the heat exchange means (H). At this time, when the temperature inside the fermentation chamber 2 reaches an appropriate level by a temperature sensor and a control system not shown in the drawing, the electronic variable valve 32 is operated to pass the gas to the primary circulation chamber 31a. The heat exchange means (H) is moved through the circulation pipe (P5), and when the temperature inside the fermentation chamber is lower than an appropriate level by the detection of the temperature sensor, the flow path of the electronic variable valve 32 is controlled by the signal of the control box. Since the gas is switched, the gas in the primary circulation chamber 31a flows into the secondary circulation chamber 31b through the gas circulation tube P6. The gas introduced into the secondary circulation chamber 31b is circulated under the outer cylinder 1 to raise the temperature inside the fermentation chamber 2 and then flows out through the circulation pipe P8 to the heat exchange means H.

In addition, since the heat medium liquid part 38 is formed between the secondary circulation chamber 31b and the fermentation chamber 2, the heat in the secondary circulation chamber 31b is continuously transmitted to the fermentation chamber 2.

The gas introduced into the heat exchange means (H) is moved from the gas inlet chamber (44a) to the lower gas passage 46 through the gas circulation path 43 on one side, and then again through the gas circulation path 43 on the other side. It is moved to the gas outlet chamber (44b), is to flow out through the exhaust pipe (P9).

In addition, the air introduced into the air heating chamber 42 of the heat exchange means H from the condensation means C through the air circulation pipe A2 has a proper temperature by a gas circulation passage 43 through which hot gas passes. To be heated. That is, since the air is brought into contact with the outer circumferential surface of the plurality of gas circulation paths 43 while the air is delayed in the air heating chamber 42, heat is raised to the fermentation chamber 2 through the air circulation pipe A3. It is coming in.

As described above, the present invention passes the gas generated during the fermentation process of food waste in the condensation process to remove water and remove impurities, and then heats and burns the high temperature in the primary purification member and the secondary purification member to pass through the filter. Therefore, it is possible to prevent air pollution because of the complete purification.

In addition, since the air flowing into the fermentation chamber is raised to an appropriate temperature while the hot gas passes through the condensation means and the heat exchange means, the hot air is supplied into the fermentation chamber to increase the fermentation efficiency.

In addition, by allowing the above-mentioned high temperature gas to pass along the outer surface of the fermentation chamber, it is possible to maintain the inside of the fermentation chamber at an appropriate temperature, and separate heating by using it as a heat source for raising the temperature of the fermentation chamber by using a heat source of gas emitted to the outside. It is a beneficial invention with the effect that can be used economically without a device.

Claims (5)

A food waste treatment method for inoculating food waste by inoculating microorganisms, comprising: a condensation process of passing impurities generated in the fermentation process and removing impurities contained in the gas by cold air supplied from the outside; A first purifying process of purifying the introduced gas by burning it at a high temperature; a second purifying process of purifying the gas introduced in the first purifying process by the activated carbon layer; and a fermentation of the gas introduced in the second purifying process. A recirculation process for maintaining the fermentation chamber at an appropriate temperature by supplying it to the outside of the fermentation chamber of the process, and increasing the air supplied into the fermentation chamber to an appropriate temperature by passing the gas introduced in the recirculation process through a plurality of circulation paths. Treatment method of food waste, characterized in that the heat exchange process for. In a known fermentation apparatus in which a stirring member (M) is provided in a fermentation chamber (2) formed inside the outer cylinder (1) to treat food waste, the gas generated in the fermentation chamber (2) is staggered. A condensation unit (C) having a condensation chamber (12) passing through the furnace and having a plurality of circulation paths (13) in which the outside air is supplied in the condensation chamber (12) in left and right directions; The first purifying member F1 for burning the introduced gas by the heater 23 and the second purifying member 26 for passing the gas introduced from the first purifying member F1 to the purified carbon 26 again for purification. Recirculating means (R) for circulating the purifying member (F2) and the gas introduced from the second purifying member (F2) to the circulation chambers (31a) (31b) formed on the outer circumferential surface of the outer cylinder (1); Air heating chamber 4 configured inside the outer cylinder 41 to allow gas flowing in from the recirculation means R to pass therethrough. 2) a food waste treatment method comprising a heat exchange means (H) having a plurality of circulation paths (43) in the vertical direction. The condensing means (C) according to claim 2, wherein the condensing means (C) is an inlet portion (12a) by the partition wall (14) provided in the vertical direction in the central portion of the condensation chamber (12) in which a plurality of air circulation paths (B) are provided in the right and left length directions. ) And the outlet part 12b, respectively, and the passage 15 is formed below the partition wall 14, and the air outlet part 17a is formed by the left and right partition walls 16 installed in the left and right length direction in the condensation chamber 12. And the air inlet 17b is divided and the air passage 18 is formed on the other side of the left and right partition 16, and the blower 19 is installed on the air inlet 17b side. Processing unit. The recycling means (R) is composed of a primary circulation chamber (31a) formed in the upper portion of the outer cylinder (1) and a secondary circulation chamber (31b) formed in the lower portion, respectively, each of the primary circulation chamber (31a) ) And the secondary circulation chamber (31b) is connected to the electronic variable valve 32, characterized in that configured to be disposed of and shut off food waste. The heat exchange means (H) is a gas inlet chamber (44a) and the gas outflow by the partition wall 45 formed on the upper portion of the air heating chamber 42 in which a plurality of gas circulation path 43 is formed in the vertical length direction Dividing chamber (44b) and forming a gas passage 46 in the lower portion, and the heater 47 is provided on the outlet side of the air heating chamber 42, characterized in that the food waste treatment apparatus.

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