KR100991572B1 - Organic wastes recycling system - Google Patents

Abstract

PURPOSE: A device for recycling the organic waste is provided to recycle the organic waste having high water content such as sewage sludge generated in the food waste, livestock waste, livestock excretions, domestic waste water treating plant as organic fertilizer or fill material or top-soil material with a low energy cost. CONSTITUTION: A device for recycling the organic waste includes a raw material storing tub(1), a quicklime storing tub(2), a first reactor, a second reactor. The raw material storing tub stores the organic waste storing the moisture. The first reactor performs hydration reaction of quicklime which generates slaked lime as the moisture included in the organic water and quicklime reacts by mixing the organic waste and the quicklime. The second reactor performs the reaction which forms calcium carbonate as slaked lime included in the mixture supplied from the first reactor and carbon dioxide reacts. The first reactor is formed on the top of the second reactor and a first reactor gate is formed on the lower part of the first reactor. After completing the first reactor, the first reactor gate is opened and the mixture in the first reactor is transferred to the second reactor by gravity. At least one net of mesh type is installed inside the lower part of the second reactor at the upper part of the pipe supporting carbon dioxide which has a carbon dioxide spraying nozzle. The horizontal vibration motor is connected to the net.

Description

Organic Wastes Recycling System

The present invention relates to an apparatus for recycling organic waste, and more particularly, by using a hydration reaction of quicklime and calcium carbonate of slaked lime, such as food waste, livestock waste, livestock manure, and sewage sludge generated in domestic sewage treatment plants. The present invention relates to an organic waste recycling apparatus for solidifying an organic waste having a high water content and recycling it as an organic fertilizer or civil soil or cover material.

Marine dumping wastes and food wastes such as sewage sludge from livestock wastewater and domestic sewage treatment plants contain large amounts of organic materials that can be utilized by humans, but they contain water and volatile organic compounds (VOCs) that are harmful to humans. And odorous substances cannot be used as they are without access to life sciences or chemical engineering. Therefore, in order to recycle such organic waste, it is necessary to remove volatile organic compounds and lower the moisture content to be a solidified product.

There is a method for solidifying by hot air drying in a device specially designed for this purpose (Korean Patent Registration No. 10-0551928, 2006. 02. 16. registration announcement), but this method has a problem of consuming excessive energy.

Traditionally, organic waste is mixed with quicklime and solidified. When the organic waste is mixed with quicklime, water [H ₂ O] and quicklime [CaO] contained in it react with heat to generate heat [21.79mol / mol]. This heat causes the water to evaporate and low molecules contained in the organic material. The substance is also volatilized. In addition, as slaked lime [Ca (OH) ₂ ] is generated, the organic material having a higher molecular weight or more that cannot be volatilized is stabilized in a short time. Slaked lime also acts to extinguish the microorganisms contained in the waste by its hydroxyl group [OH]. However, the slaked lime [Ca (OH) ₂ ] produced by the above reaction is partially dissolved in water, and the hydroxyl group [OH] is released to increase the alkalinity [PH] of water to about 12.8, thereby reducing the moisture content of the treated organic waste including slaked lime. It just causes another problem. In other words, recycled products produced due to too high alkalinity are difficult to use for soil application and have limitations in use. To overcome this problem, a process or element for adjusting pH may be added. For example, Korean Patent Registration No. 10-0858718 (September 17, 2008) discloses obtaining a product having a pH of about 7-8 by mixing sewage sludge with acid powder and quicklime. However, the addition of these processes or elements not only makes process control more difficult, but also leads to an increase in cost.

The present invention has been made to solve the above-mentioned problems of the prior art, and will transcend the limitation of the conventional resource recycling method using quicklime. Accordingly, an object of the present invention is to organically fertilize organic wastes having high moisture content such as food waste, livestock waste, livestock manure, sewage sludge produced in domestic sewage treatment plant by using hydration reaction of quicklime and calcium carbonate of slaked lime. Another object is to provide a recycling apparatus for organic waste that is recycled into civil engineering fill material or cover material.

It is also an object of the present invention to provide an apparatus for recycling organic wastes in which global warming materials reduce carbon dioxide by reacting carbon dioxide with slaked lime and solidifying it with calcium carbonate. In particular, the present invention can further increase the resource recycling rate by using the odorous substances generated from the organic waste as a carbon dioxide source for reacting the flue gas containing carbon dioxide discharged through the photooxidation reaction in the photocatalytic reactor with slaked lime.

Other objects and advantages of the invention will be understood by the following description.

In order to achieve the above object, the present invention provides an apparatus for recycling organic wastes using a hydration reaction of quicklime and calcium carbonate of slaked lime. The apparatus according to the present invention comprises a raw material storage tank for storing organic waste containing moisture, a quicklime storage tank for storing quicklime, an organic waste supplied from the raw material storage tank and a quicklime supplied from the quicklime storage tank are mixed and contained in the organic waste. The first reactor in which the hydration reaction (first reaction) of quicklime, in which water and the quicklime react to generate slaked lime, is performed, and the slaked lime contained in the mixture supplied from the first reactor reacts with carbon dioxide to produce calcium carbonate. And a second reactor in which the forming reaction (second reaction) is carried out.

In the above, the first reactor is formed in the upper portion of the second reactor, the first reactor gate is formed in the lower portion of the first reactor, the first reactor gate is opened after the first reaction is completed Preferably, the mixture in the first reactor is transferred to the second reactor by gravity, and in particular, the first reactor and the second reactor are preferably integrally formed.

The first reactor is provided with a stirrer capable of moving in the x-axis and y-axis on the plane, the first reactor is provided with a pressure control valve for maintaining the pressure of the first reactor at 2 atmospheres, the first reactor It is preferred that the reactor safety valve is installed when the pressure of the first reactor is 5 atm.

At least one mesh type network is installed on the lower portion of the second reactor in the upper portion of the carbon dioxide supply pipe where the carbon dioxide injection nozzle is formed, and the horizontal vibration motor is connected to the network, and the vertical vibration motor is also connected to the network. It is preferable. A second reactor gate is formed at a lower portion of the second reactor under the carbon dioxide supply pipe, and after the second reaction is completed, the second reactor gate is opened so that the mixture in the second reactor is dropped by gravity. It is preferred to be collected.

The recycling apparatus further includes a photocatalytic reactor, wherein the photocatalytic reactor receives odor gas and volatile organic compounds (VOC) discharged from the raw material storage tank and the first reactor and oxidizes them by titanium dioxide photocatalyst. After discharging the gas into a gas containing carbon dioxide, the gas discharged from the photocatalytic reactor is preferably supplied to the second reactor as a carbon dioxide source. In particular, the photocatalytic reactor is a processing gas supply pipe for supplying the gas to be treated at the bottom of the reactor, a porous plate installed in the lower region of the reactor where the titanium dioxide slurry formed by dispersing titanium dioxide in water, the outside of the reactor above the porous plate UV light source installed in the ultraviolet light source, a circulation pipe for circulating the titanium dioxide slurry filled in the porous plate region to the upper portion of the reactor, the titanium dioxide slurry installed in the circulation pipe is circulated in the porous plate region the upper portion of the reactor In the photocatalytic reactor, the process gas is moved from the bottom of the reactor to the top, and in contact with the titanium dioxide slurry injected from the top of the reactor to the bottom with the aid of the light irradiated from the ultraviolet light source. Is converted to carbon dioxide desirable.

The second reaction is completed product is dried by a hot air dryer, the gas generated during the hot air drying is preferably introduced into the photocatalytic reactor.

The apparatus includes a screw conveyor or pipe for supplying raw materials as a supply passage for supplying the organic waste from the raw material storage tank to the first reactor, and a screw for supplying quicklime as a supply passage for supplying the quicklime from the quicklime storage tank to the first reactor. It further comprises a conveyor or air conveying pipe, wherein the raw material supply screw conveyor or tubing and the quicklime feed screw conveyor or air conveying pipe crosses at the inlet of the first reactor to the raw material and the quicklime of the first reactor It is preferable to mix and input at an inlet. A gate is installed at an inlet of the first reactor in which the raw material and the quicklime are mixed and added, and the gate may be closed immediately after the input of the raw material and the quicklime is completed. At the end of the quick feed screw conveyor or the air feed pipe, it is preferable that a backflow preventing means is provided to prevent the quicklime supplied from flowing backward by the exhaust gas generated in the first reactor.

It is preferable that a stirrer is provided in the raw material storage tank, and a vibration motor is provided outside the raw material storage tank. It is preferable that a heat insulation pipe is installed outside the raw material storage tank. Water vapor, odor gas, and volatile organic compounds evaporated by heat generated by the first reaction performed in the first reactor may be introduced into the photocatalytic reactor after passing through the heat insulating pipe.

It is preferable that the upper part of the quicklime storage tank is provided with a dust collecting filter for preventing quicklime dust generation, and a vibration motor is installed outside the quicklime storage tank. It is preferable that a positive pressure facility using dry air is installed at an upper portion of the quicklime storage tank.

According to the present invention, organic fertilizers having high moisture content such as food waste, livestock waste, livestock manure and sewage sludge generated from domestic sewage treatment plant can be used at low energy costs by continuously using hydrated lime and calcium carbonate of slaked lime. Or it can be recycled as civil engineering fill or cover material. In addition, the present invention is a so-called green technology that the global warming material can reduce carbon dioxide by reacting carbon dioxide with slaked lime and solidifying it with calcium carbonate. In particular, the present invention can further increase the resource recycling rate by using the odorous substances and volatile organic compounds generated from the organic waste as a carbon dioxide source for treating the exhaust gas discharged from the photocatalytic reactor with slaked lime.

More specifically, according to the present invention, a storage tank of organic waste [livestock waste including livestock manure, food waste and marine dumping materials] could be supplied to the reactor without clogging, keeping constant viscosity, risk of freezing and constant moisture content. .

In addition, dust generation in the upper part of the quicklime storage tank was also suppressed, thereby preventing the exposure to health risks due to the inhalation of quicklime by the workers, and no hardening phenomenon in the quicklime storage tank due to the self-load of the quicklime was not observed. It was not found that the conversion of calcined lime into calcination, and also solved the difficult problem of fluidity limitation of quicklime powder in enclosed space when quicklime was introduced into the reactor.

In addition, the reaction time of the present invention can be shortened by injecting organic waste and quicklime simultaneously in the reactor.

In addition, when the organic waste is reacted with quicklime [CaO] firstly, calcined lime [Ca (OH) ₂ ] is produced, which can be confirmed by checking PH [12.8] of the primary product. It was confirmed that the reaction occurred well due to the change, which could easily solidify carbon dioxide, a global warming material, and the overload problem of the stirrer due to the change in viscosity of the reaction product in the reactor was also related to the water content during the input of raw materials. , Secondary reaction breakthrough efficiency was confirmed according to the automatic vibration motor installation, the carbon dioxide supply nozzle in the reactor was also confirmed that the continuous operation without clogging, using a photocatalyst equipped with the present invention odor and VOC reduction device [Application No. 10-2009 -0075058] can be confirmed that the complex odor is operated below the domestic environmental standard value [within 500 ~ 1,000], and the discharge port using hydraulic pressure during the discharge of the final product The problem of adhesion in the reactor according to the viscosity change of the final product was also solved, and it was confirmed that the physical properties of the final product according to the change in the amount of carbon dioxide injected into the reactor could be controlled. The additional evaporation of water was confirmed, reducing the amount of quicklime injected into the reactor using the conventional quicklime by about 10%.

Finally, the moisture content adjustment of the final product is based on the drying method by forced hot air.

Adoption has produced a low cost, high efficiency end product.

The above effects can be summarized in the table below.

 * Comparison table of existing organic waste treatment technology with the present invention

division Fermentation system Drying / Energy System Invention system Composting Energy Application field Waste food possible possible possible possible Livestock waste possible possible Possible-inefficient possible Sediment / Journey impossible impossible impossible possible Sewage sludge impossible impossible possible possible Limitation of Technology Wastewater Occur Occur None None Compost / fertilizer possible possible impossible possible Civil engineering impossible impossible impossible possible stink Occur Occur Occur None Secondary pollution There There Yes (dioxin) None coal fuel Can be used Can be used Can be used None Global warming material Occurs Additional occurrence Additional occurrence Reduced Processing time 150 hours 150 hours 2 hours 1 hours Equipment cost investment Medium investment Medium / large scale Large investment For consumption Ordinary expenses Medium cost High cost High cost Low cost

Hereinafter, the present invention will be described in more detail with reference to the drawings.

1 is a schematic diagram schematically showing an apparatus for recycling organic waste according to the present invention. As shown in Figure 1, the organic waste recycling apparatus according to the present invention is a raw material storage tank (①) for storing the organic waste containing moisture, the quicklime storage tank (②) for storing quicklime, to quickly mix the raw material and quicklime A mixer (③) having a structure to carry out a reactor (⑤) and a product (2) for carrying out a first reaction between raw materials and quicklime and a second reaction between slaked lime and carbon dioxide produced by the first reaction. The product conveying conveyor belt (⑥) and the hot air dryer (⑦) for hot-air drying the conveyed product. At this time, the reactor ⑤ is a hydration reaction of quicklime, in which the organic waste supplied from the raw material storage tank ① and the quicklime supplied from the quicklime storage tank ② are mixed to react with the moisture contained in the organic waste and the quicklime (first A reaction to form calcium carbonate by reacting with a carbon dioxide supplied with calcined lime, which is a product of the hydration reaction of quicklime contained in the mixture supplied from the first reactor. And a second reactor carried out. These first and second reactors are preferably formed integrally. The recycling apparatus of the present invention may include a photocatalytic reactor ④.

Organic waste raw materials are food waste, livestock waste, livestock manure, sewage sludge generated from domestic sewage treatment plant, and contain a lot of moisture and contain odorous substances and volatile organic compounds. Not only consumes too much energy, but it is also difficult to process. When the raw material is left in a stagnant state, the separation of layers occurs due to the difference in the specific gravity of the organic material having a light specific gravity, the heavy organic material and the water contained in the organic material. This phenomenon makes it difficult to inject the raw material into the reactor, and even if it is injected into the reactor, effective uniform stirring is difficult, making it difficult to manufacture a uniform product. Therefore, in the present invention, the raw material storage tank is specifically designed to prevent such a phenomenon.

FIG. 2 is a detailed view of the raw material storage tank shown in FIG. 1. As shown in Figure 2, the raw material storage tank (①) is provided with a stirrer for preventing separation (①-3) in order to prevent the delamination phenomenon as described above. In addition, the organic waste raw material may stick to the storage tank due to its viscosity, and an automatic vibration motor (①-2) is installed to prevent this. In order to prevent freezing during the winter, a heat insulating pipe (①-1), for example, a steam jacket for keeping warm is installed outside the raw material storage tank. The heat insulating pipe is installed to extend from the bottom of the raw material storage tank to the top, and as the heat medium of the heat insulating pipe, water vapor containing odorous substances and volatile organic compounds generated in the first reactor is used as described in detail below. This water vapor is introduced into the photocatalytic reactor (④) after passing through the heat insulating pipe (①-1). A raw material supply screw conveyor or pipe (①-5) is installed between the raw material storage tank (①) and the reactor (⑤), and the electronic balance (①-4) is installed in the raw material storage tank ①. This is installed to quantify the raw material to be introduced into the reactor. In addition, in the raw material storage tank (①), odor gas and volatile organic compounds may be volatilized from the raw material, and such gas may be reacted with a photocatalyst reactor along with water vapor containing odor gas and volatile organic compounds used as a heat medium of the thermal insulation pipe (①-1). ④) flows into.

On the other hand, quicklime is used in the form of a powder, in the quicklime storage tank due to the specific gravity of the quicklime itself [3.25 ~ 3.35] and gravity caused the compression of the quicklime, it is difficult to transport the solid powder. In order to solve this problem of powder transfer, the quicklime reservoir is specially designed.

3 is a detailed view of the quicklime reservoir shown in FIG. 1. As shown in Figure 3, the quicklime storage tank is provided with an automatic vibration motor (②-2) for preventing crimping to solve the problem of quicklime powder transfer. This vibration motor prevents adhesion of the quicklime powder by the non-flowability and gravity. In addition, a dust collector (②-1) is installed on the top of the quicklime reservoir to prevent the quicklime powder from scattering. Such a dust collector can prevent a health hazard in which the worker inhales quicklime dust. In addition, the quicklime storage tank is equipped with an electronic balance (②-3) for accurately calibrating the amount of quicklime to be introduced into the reactor. Between the quicklime storage tank (②) and the reactor (⑤) is a feed passage for supplying quicklime, a screw conveyor for supplying quicklime or an air transfer pipe is installed. On the other hand, although not shown in the drawings, it is preferable that a positive pressure facility using dry air is installed at the upper part of the quicklime storage tank. This positive pressure system prevents quicklime from coming into contact with moisture in the air.

Water and quicklime contained in organic waste react instantaneously, and volume changes occur. That is, the volume increases by about 50%. Therefore, when organic waste and quicklime are injected into the pipe before being injected into the reactor, clogging of the pipe may occur due to the expansion of the volume. On the other hand, if the organic waste and quicklime are not mixed, that is, separately injected into the reactor as an inlet and mixed in the reactor, the reaction time becomes longer. Therefore, the present invention has designed a special mixer structure in which the screw conveyor or tubing for raw material supply and the screw conveyor or tubing for quicklime feeding are mixed at the same time as they are injected into the reactor without being mixed and immediately mixed.

4 is a detailed view of the structure of the mixer shown in FIG. 1. As shown in Figure 4, the mixer structure (③) is a screw conveyor or pipe for supplying raw material (①-5) and a screw conveyor or air feed pipe for the quicklime supply is crossed at the inlet of the reactor (⑤) raw material and quicklime is It is a structure that is mixed and input at the inlet of reactor (⑤). In this mixer structure, a gate ③-2 is installed at the inlet of the reactor. This gate is closed when the raw material is filled in the reactor (⑤) serves to prevent the exhaust gas generated by the reaction heat in the reactor to flow into the raw material storage tank (①) and quicklime storage tank (②). At the end of the screw conveyor for quicklime supply or the air feed pipe, a backflow prevention means (③-1) is installed to prevent the quicklime supplied from flowing backward by the exhaust gas generated in the reactor (⑤). Such backflow prevention means may be a damper, for example.

Moisture [H ₂ O] contained in the organic waste material introduced from the reactor (⑤) reacts with the added quicklime [CaO] to form calcined lime [Ca (OH) ₂ ] to generate heat of reaction [21.79㎉ / mol]. This generated heat evaporates the moisture contained in the raw material. The amount of water consumed by this reaction is 18 kg per 56 kg of quicklime [CaO] [kgmol], and the amount of water evaporated by the reaction heat is 35.14 kg. Thus, the amount of water contained in the total organic waste is 53.14 kg, which leads to a change in the moisture content of the primary reaction products [organic waste and slaked lime], leading to a change in the viscosity of the reactants in the reactor. In addition, the first reaction product slaked lime reacts with carbon dioxide to produce white calcium carbonate [CaCO ₃ ], the heat of reaction [16.46㎉ / mol] generated by evaporating the water contained in the product in the reactor [26.36 ㎏ / mole lime ] And another change in moisture content in the reactor, causing a change in viscosity of the reactants. Thus, the agitation of the primary reactants in the reactor is an important factor and also requires efficient operation of the secondary reactants. The present invention therefore specially designs for this purpose the reactors, ie the first reactor and the second reactor and combinations thereof.

FIG. 5 is a detailed view of the reactor shown in FIG. 1. As shown in FIG. 5, the reactor ⑤ preferably has a first reactor and a second reactor integrally formed. The first reactor is formed on top of the second reactor. The first reactor gate 5-5 is formed at the bottom of the first reactor. Such a gate is preferably a hydraulic gate that is opened and closed by hydraulic pressure. The gate 5-5 is opened after the first reaction between the water contained in the organic waste and the quicklime (hydration reaction of quicklime) is completed, and the mixture in the first reactor is transferred to the second reactor by gravity. The first reactor gate ⑤-5 is mounted to have a structure that can offset the sticking phenomenon in the reactor due to the viscosity change of the first reactant. The first reactor is provided with a stirrer (⑤-3) which can move on the x-axis and y-axis on the plane. Such a stirrer not only mixes raw materials and quicklime well, but also may perform stirring corresponding to a change in viscosity according to the progress of the reaction. The first reactor is provided with a pressure regulating valve (⑤-1) for maintaining the pressure of the first reactor at a predetermined pressure, preferably approximately 2 atmospheres. Maintaining a constant pressure by the pressure control valve stabilizes the waste organic matter and organic substances harmful to the human body generated during the reaction in the reactor. The first reactor is provided with a reactor safety valve (5-2) which opens when the pressure of the first reactor reaches a predetermined pressure, preferably about 5 atmospheres. Such a safety valve is installed to protect the reactor when the pressure rises due to an abnormal reaction in the reactor. The first reactor is also equipped with a thermometer ⑤-4. Thermometer (⑤-4) is a thermometer that can measure from 0 ° C to 200 ° C. The temperature of the first reactant is up to 150 ° C and the reaction is considered complete when the temperature of the reactor drops to about 50 ° C. In the first reactor, odorous substances and volatile organic compounds are volatilized and moisture evaporates by the reaction heat generated when the water and the quicklime react in the raw material. Since the water vapor has a high energy, it is discharged from the first reactor and then introduced into the insulating pipe (①-1) of the raw material storage tank (①) and used as a heat medium for heating the raw material storage tank, and then into the photocatalytic reactor (④).

The secondary reactor thermometer ⑤-6 measures the secondary reactant temperature. The temperature of the secondary reactant is the highest temperature of about 80 ℃ and when the temperature of the reactor drops to 50 ℃ it can be seen that the reaction is complete. The fluoroscopy inside the reactor (⑤-7) can use quartz or safety glass that can withstand the pressure of 7 atm, which visually checks whether the air supplied from the bottom of the reactor (air containing carbon dioxide) is evenly reacted in the reactor. It can function. The secondary reactor vertical vibration motor (⑤-8) and the left and right vibration motors (⑤-9) function to uniformly stir the reactants according to the viscosity change of the secondary reactants and to relieve adhesion in the reactor due to viscosity when the product is discharged. It plays a role. These vibration motors are connected to at least one mesh type network installed on the upper portion of the carbon dioxide supply pipe in which the carbon dioxide injection nozzle is formed in the lower portion of the second reactor. The head part of the secondary reactor air supply pipe (⑤-10) is equipped with a bubble cap type air distributor, which is generally used in a distillation column, so that nozzles installed inside the distributor may be blocked by solid products. It is mounted so that it cannot be. The secondary reactor hydraulic gate (⑤-11) also has the same function as the primary reactor hydraulic gate (⑤-5). When the second reaction is completed, the gate is opened to allow the mixture in the second reactor to fall and collect by gravity.

The function of the cleaning pipe (⑤-12) installed on the upper part of the reactor (first reactor) is to prepare for the case where the quick lime powder, etc., which failed to react when the gas is discharged due to the heat generated in the reactor, contaminates the reactor and the parts attached to the reactor. It can be cleaned periodically.

After the first and second reactions are continuously completed as described above, the product is collected by dropping and the collected product is transferred by the product conveying belt (⑥) and then hot air dried by the hot air dryer (⑦) to the final product. Is completed. In the present invention, the state and physical properties of the final product can be controlled by changing the injection amount of carbon dioxide in the reactor, and additionally can be controlled to some extent by the conditions of hot air drying. On the other hand, during the hot air drying, some odorous substances and volatile organic compounds may be volatilized and moisture may be evaporated. These gases may be introduced into the photocatalytic reactor ④ for recycling.

In the reactor (⑤) of the recycling apparatus according to the present invention, carbon dioxide is used for calcium carbonate of slaked lime, and as the source of the carbon dioxide, carbon dioxide collected as a byproduct in various processes may be used. In the recycling apparatus according to the present invention, water vapor containing malodorous substances and volatile organic compounds is generated in the raw material storage tank (①), the reactor (⑤), in particular, the first reactor and the hot air dryer (⑦). It is preferable to convert to carbon dioxide by oxidizing with), and to use the carbon dioxide thus converted as a carbon dioxide source. At this time, as the photocatalytic reactor ④, a conventional photocatalytic reactor may be used which oxidizes a processing gas by a titanium dioxide photocatalyst while irradiating ultraviolet rays and then discharges gas or air containing carbon dioxide, and in particular, has already been filed by the present inventors. It is preferable to use the photocatalytic reactor disclosed in Korean Patent Application No. 10-2009-0075058 (filed Aug. 14, 2009).

Such a photocatalytic reactor is shown in FIG. 6. As shown in FIG. 6, the photocatalytic reactor ④ includes a reactor body 10, an ultraviolet lamp 11 for irradiating ultraviolet rays inside the reactor, and a nozzle 12 for spraying a titanium dioxide / water slurry under the reactor from the top of the reactor. It has a structure of a spray reactor comprising a). In the photocatalytic reactor ④, a porous plate 13 is formed at the bottom of the reactor, and the titanium dioxide / water slurry sprayed through the nozzle 12 is collected in the porous plate 13 region. The collected titanium dioxide / water slurry is circulated and sprayed back to the nozzle 12 through a circulation pipe by a pump. In the lower part of the photocatalyst reactor, a processing gas supply pipe is provided to supply gas to be treated. As mentioned above, odor gas and volatile organic compounds generated in the raw material storage tank (①) and the first reactor (⑤) are used. . These gases are mixed with water vapor and are also supplied with oxygen or usually air for oxidation. This process gas is oxidized and converted to carbon dioxide with the aid of light irradiated from the ultraviolet light source while in contact with the titanium dioxide slurry injected from the top to the bottom of the reactor while moving from the bottom to the top of the photocatalytic reactor. The carbon oxide thus converted is mixed with water vapor and oxygen or air, and this carbon dioxide is compressed by an air compressor and then supplied to the second reactor air supply pipe (5-10).

The present invention is specifically illustrated through the following examples.

<Examples>

Livestock wastewater (a) and sewage sludge (b) and two mixtures (c) were treated by the reactor of FIG.

A. Reactor

1) Reactor (capacity 30ℓ) and accessories

500mm in width, 400mm in length and 400mm in height, the power of the stirrer motor at the top of the reactor is 0.65KW (single phase), respectively, and the raw material inlet is connected by 100mm pipe and 25mm quicklime pipe is installed in the raw material inlet pipe. A 100mm valve was installed in the exhaust gas outlet in the reactor, and a safety valve was connected to the reactor safety valve pipe connection by 25mm pipe and opened at 5 atmospheres. The temperature detectors of the two thermometers mounted in the reactor can measure up to 200 ° C. In addition, the raw material reservoir has a capacity of 15 liters, the quicklime reservoir has a capacity of 10 liters and a vibrating motor of 0.4KW capacity is installed in each reservoir.

B. Quicklime and Raw Materials

1) quicklime

Domestic quicklime (95wt%) was used for each reaction 6kg.

2) raw material

division Livestock Wastewater (a) sewer Sludge (b) Mixture (c) Moisture content ( wt %) 85.5 82.3 83.9 Input volume kg ) 15.0 15.0 15.0

C. Results

As a result of operating the equipment of the present invention, data for each sample was obtained in [Table 1].

TABLE 1

division Livestock Wastewater (a) sewer Sludge (b) Mixture (c)   Raw Material Input ( kg ) 15.0 15.0 15.0 Quicklime input ( kg ) 6.0 6.0 6.0 Primary
half
Huh
group Uptime (minutes) 20 20 20 Reactor temperature () 100 105 100 Moisture content (wt%) 53 50 51.5 PH 12.80 12.78 12.78 Secondary
half
Huh
group Uptime (minutes) 40 40 40 Reactor temperature () 80 83 82 Moisture content (wt%) 45 42 43 PH 8.23 8.50 8.34

1 is a schematic diagram schematically showing an apparatus for recycling organic waste according to the present invention.

FIG. 2 is a detailed view of the raw material storage tank shown in FIG. 1.

3 is a detailed view of the quicklime reservoir shown in FIG. 1.

4 is a detailed view of the structure of the mixer shown in FIG. 1.

FIG. 5 is a detailed view of the reactor shown in FIG. 1.

FIG. 6 is a detailed view of the photocatalytic reactor shown in FIG. 1.

<Description of the symbols for the main parts of the drawings>

①: Raw material storage tank ①-1: Insulation piping

①-2: vibration motor ①-3: stirrer

①-4: Electronic Balance ①-5: Screw Conveyor

②: quicklime storage tank ②-1: Dust collector

②-2: vibration motor ②-3: electronic scale

③: Mixer ③-1: Backflow prevention means (damper)

③: hydraulic gate ④: photocatalytic reactor

⑤: reactor ⑤-1: pressure regulating valve

⑤-2: Safety valve ⑤-3: Agitator

⑤-4: first reactor thermometer ⑤-5: first reactor hydraulic gate

⑤-6: 2nd reactor thermometer ⑤-7: 2nd reactor internal viewing microscope

⑤-8: Vertical vibration motor ⑤-9: Horizontal vibration motor

⑤-10: carbon dioxide supply piping ⑤-11: second reactor gate

⑤-12: Washing pipe ⑥: Product conveying belt

⑦: hot air dryer

Claims (20)

Raw material storage tank for storing water containing organic waste, Quicklime storage tank to store quicklime, A first hydration reaction (first reaction) of quicklime, in which the organic waste supplied from the raw material storage tank and the quicklime supplied from the quicklime storage tank are mixed to react with the water contained in the organic waste and the quicklime produces slaked lime. Reactor, and A second reactor in which the slaked lime contained in the mixture supplied from the first reactor reacts with carbon dioxide to form calcium carbonate (second reaction), and The first reactor is formed at the top of the second reactor, a first reactor gate is formed at the bottom of the first reactor, the first reactor gate is opened after the first reaction is completed, the first reactor The mixture in is characterized in that it is transferred to the second reactor by gravity, At least one mesh type network is installed in the upper portion of the second carbon dioxide supply pipe in which the carbon dioxide injection nozzle is formed, and the horizontal vibration motor is connected to the lower portion of the second reactor. delete The method of claim 1, Resource recycling apparatus for organic waste, characterized in that the first reactor and the second reactor is formed integrally. The method of claim 1, The first reactor is a resource recycling apparatus for organic waste, characterized in that the stirrer which is movable on the x-axis and y-axis on the plane. The method of claim 1, The first reactor is a resource recycling device for organic waste, characterized in that a pressure control valve for maintaining the pressure of the first reactor to 2 atm. The method of claim 5, The first reactor is a resource recycling apparatus for organic waste, characterized in that the reactor safety valve is installed when the pressure of the first reactor is 5 atm. delete The method of claim 1, And a vertical vibration motor is also connected to the network. The method of claim 1, A second reactor gate is formed at a lower portion of the second reactor under the carbon dioxide supply pipe, and after the second reaction is completed, the second reactor gate is opened so that the mixture in the second reactor is dropped by gravity. Recycling device for organic waste, characterized in that the collection. The method of claim 1, The recycling apparatus further includes a photocatalytic reactor, wherein the photocatalytic reactor receives odor gas and volatile organic compounds (VOC) discharged from the raw material storage tank and the first reactor and oxidizes them by titanium dioxide photocatalyst. After discharging the gas into a gas containing carbon dioxide, the gas discharged from the photocatalytic reactor is supplied to the second reactor as a carbon dioxide source. The method of claim 10, The photocatalytic reactor may include a processing gas supply pipe through which a gas to be treated is supplied at the bottom of the reactor, a porous plate installed in a lower region of the reactor where titanium dioxide slurry formed by dispersing titanium dioxide in water is installed, and installed outside the reactor on the porous plate. UV light source for irradiating ultraviolet rays, a circulation pipe for circulating the titanium dioxide slurry filled in the porous plate region to the upper portion of the reactor, the titanium dioxide slurry installed in the circulation pipe and circulated in the porous plate region from the top of the reactor And a spray nozzle spraying into the photocatalytic reactor, wherein the process gas is oxidized with the aid of the light irradiated from the ultraviolet light source while in contact with the titanium dioxide slurry sprayed from the top to the bottom of the reactor while moving from the bottom to the top of the reactor. Characterized by being converted to carbon dioxide Recycling system of organic waste that. The method of claim 10, The product of which the second reaction is completed is dried by a hot air dryer, and the gas generated during the hot air drying is introduced into the photocatalytic reactor. The method of claim 1, The apparatus is a screw conveyor or pipe for supplying raw materials as a supply passage for supplying the organic waste from the raw material storage tank to the first reactor and a screw for supplying quicklime as a supply passage for supplying the quicklime from the quicklime storage tank to the first reactor. It further comprises a conveyor or air conveying pipe, wherein the raw material supply screw conveyor or tubing and the quicklime feed screw conveyor or air conveying pipe crosses at the inlet of the first reactor to the raw material and the quicklime of the first reactor Recycling device for organic waste, characterized in that the mixing and input at the inlet. The method of claim 13, A gate is provided at an inlet of the first reactor in which the raw material and the quicklime are mixed, and the gate is closed immediately after the input of the raw material and the quicklime is completed. The method of claim 13, At the end of the screw conveyor for supplying quicklime or the air conveying pipe, the backflow prevention means for preventing the backflow of the quicklime supplied by the exhaust gas generated in the first reactor is installed, the resource of the organic waste. The method of claim 10, An agitator is installed in the raw material storage tank, and a vibration motor is installed outside the raw material storage tank. The method of claim 16, An apparatus for recycling organic waste, characterized in that a heat insulating pipe is installed outside the raw material storage tank. The method of claim 17, Water vapor, odor gas and volatile organic compounds evaporated by heat generated by the first reaction performed in the first reactor is passed to the photocatalytic reactor after passing through the heat insulation pipe, characterized in that the recycling of organic waste . The method of claim 1, An upper part of the quicklime storage tank is installed a dust collecting filter for preventing the quicklime dust generation, and the outside of the quicklime storage tank is a recycling device for organic waste, characterized in that the vibration motor is installed. The method of claim 19, The upper part of the quicklime storage tank is a resource recycling apparatus for organic waste, characterized in that a positive pressure facility using dry air is installed.

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