JP2021186426A - Raw refuse heat sterilization device - Google Patents

Abstract

To achieve the purpose of this study of reducing the time to elevate the temperature of a raw refuse in the raw refuse heat sterilization treatment using the raw refuse sterilization equipment, the purpose of making it difficult to generate the temperature difference between the center and the outside of the tank for the sterilization treatment of raw refuse, the purpose of this study is to reduce the time for sterilization of the raw refuse uniformly, the purpose of making it easy to maintain a whole of the raw refuse at a high-temperature for a certain period of time, and the purpose of improving the efficiency of the heat sterilization treatment of the raw refuse.SOLUTION: A rotary shaft 3 perpendicular to a bottom plate 22 of a processing tank 2 is installed in the center of the processing tank 2, and a stirring blade 4 is fixed to the rotary shaft 3, and a fixed blade 5 is fixed to an inner side surface 24 of the processing tank 2, and in the processing tank, a steam nozzle 6 for supplying steam to heat sterilization of the raw refuse containing the raw refuse is disposed, and on the outer surface 24 of the processing tank 2, a raw refuse heat sterilization apparatus 1 is provided with a steam chamber 8 to which the steam is supplied for heating and sterilizing the inside of the processing tank 2 and garbage.SELECTED DRAWING: Figure 1

Description

The present invention relates to a swill heat sterilizer, and more particularly to a swill heat sterilizer that heats and sterilizes swill while stirring the swill in a treatment tank.

Traditionally, food waste discharged from commercial eating and drinking establishments, school lunch rooms, homes, etc. has been incinerated in incinerators. However, since these food wastes are large in quantity and contain a large amount of water, it has been pointed out that there are harmful effects such as increasing the amount of harmful substances discharged from the incinerator and shortening the life of the incinerator. Therefore, a swill treatment device that dries and decomposes swill and treats it at the site where swill is generated has come to be used.

This food waste disposer is roughly divided into a dry type and a decomposition type. The dry type removes the water contained in the food waste to reduce the amount of waste, and the decomposition type uses microorganisms to reduce the amount of waste. Is to biodegrade. The decomposition type swill treatment device includes swill, microorganisms, a moisture conditioner, a microbial carrier, etc. (hereinafter, may be simply referred to as “stirred matter”) in the treatment tank, and oxygen necessary for the survival and oxidative decomposition of microorganisms. Is charged, and the stirring blade provided in the processing tank is rotated to stir the object to be stirred to promote the decomposition of swill.

The food waste dried or decomposed in this way is also used as fertilizer and feed for livestock. Therefore, in order to use it safely as feed for livestock, as stipulated in the heat treatment conditions of the breeding hygiene management standard, when the swill is treated in the treatment tank of the swill treatment device, the swill is heated. Processing is being performed.

As a mechanism for heat treatment of such swill, in the swill drying device, a steam flow path is provided outside the drying section for drying the swill, and the steam in the steam flow path is used to remove the swill from the drying section. A configuration for heating has been proposed (Patent Document 1).

Japanese Unexamined Patent Publication No. 2011-73001

However, in the swill treatment apparatus of Patent Document 1, since a heating mechanism is provided on the outside of the drying portion, which is a tank for treating swill, and the swill is indirectly heat-treated, it is long to raise the temperature of the swill. The problem that it takes time, the problem that the temperature difference between the center and the outside of the swill processing tank is likely to occur, and the problem that it takes a lot of time to uniformly heat sterilize the swill. There are problems that it is difficult to maintain the whole food waste at a high temperature for a certain period of time, and that the efficiency of the heat sterilization treatment is poor. Furthermore, since it has been decided that the heat sterilization treatment conditions of the breeding hygiene management standard will be raised to the same level as the international standard in the future, these problems will become more apparent.

Therefore, one of the purposes of the present invention is to solve the above-mentioned problems of the prior art and to shorten the time for raising the temperature of the swill in the swill treatment using the swill heat sterilizer. One of the purposes is to prevent the temperature difference between the center and the outside of the tank to be heat sterilized, and one of the purposes is to shorten the time for uniform heat sterilization of swill. One of the purposes is to facilitate the maintenance of the entire swill at a high temperature for a certain period of time, and one of the purposes is to improve the efficiency of the heat sterilization treatment of swill.

The means for solving the above problems are a stirring mechanism for stirring the swill and a steam nozzle for supplying steam for heat sterilizing the swill into the treatment tank in which the swill is heat sterilized. It is a swill heat sterilizer characterized by being installed.

Further, the swill heat sterilizer is characterized in that a steam chamber for supplying steam for heat sterilizing the swill in the swill is provided on the outer surface of the swill treatment tank. It is a waste heat sterilizer.

Further, in the swill heat sterilizer, the stirring mechanism includes a rotating shaft, a stirring blade fixed to the rotating shaft, and a fixed blade fixed to the inner surface of the processing tank, and the steam nozzle is a steam nozzle. It is a swill heat sterilizer characterized by being installed on the fixed blade.

Further, in the swill heat sterilizer, the fixed blade is composed of a hollow columnar body, and the steam nozzle is installed in the internal space of the fixed blade. ..

Further, in the swill heat sterilizer, the swill heat sterilizer is characterized in that a temperature sensor for measuring the temperature of the swill is installed in the treatment tank.

Further, the swill heat sterilizer is characterized in that a heat insulating material for covering the treatment tank and / and the steam chamber is installed in the swill heat sterilizer.

Furthermore, it is characterized by stirring the swill in the treatment tank where the swill is heat sterilized, supplying steam to the treatment tank, applying steam directly to the swill, and sterilizing the swill directly with steam. Swill disposal method

Further, in the above-mentioned swill treatment method, the swill treatment method is characterized in that steam is supplied to a steam chamber installed on the outer surface of the treatment tank and the swill in the treatment tank is sterilized by heating.

Further, in the above-mentioned swill treatment method, the swill treatment method is characterized in that the temperature of the swill is measured by a temperature sensor and the supply of water vapor is controlled based on the temperature of the swill.

According to the present invention as described above, in the swill heat sterilization treatment using the swill heat sterilizer, it is possible to shorten the time for raising the temperature of the swill. In addition, it has become possible to make it difficult for a temperature difference between the central part and the outside of the tank for heat sterilizing the swill to occur. In addition, it has become possible to shorten the time for uniform heat sterilization of swill. In addition, it has become easier to maintain the entire swill at a high temperature for a certain period of time. In addition, it has become possible to improve the efficiency of heat sterilization treatment of swill.

Partial sectional front view of an embodiment of the present invention Partial sectional side view of an embodiment of the present invention Partial sectional plan view of an embodiment of the present invention Enlarged perspective view of a main part of an embodiment of the present invention Enlarged perspective view of a main part of an embodiment of the present invention Enlarged perspective view of a main part of an embodiment of the present invention

Hereinafter, the present invention will be described with reference to the drawings. As shown in FIG. 1, the swill heat sterilizer 1 includes a treatment tank 2, a stirring mechanism 30 for stirring the swill installed in the treatment tank 2, a steam nozzle 6 installed in the treatment tank 2, and a steam nozzle 6. It is configured to include a temperature sensor 7 and a steam chamber 8 installed on the outer surface 25 of the processing tank 2. Further, the stirring mechanism 30 includes a rotating shaft 3 vertically installed in the processing tank 2, a stirring blade 4 fixed to the rotating shaft 3, and a fixed blade 5 fixed to the inner side surface 24 of the processing tank 2. Has been done. Although not shown, the swill heat sterilizer 1 controls a swill heat sterilizer 1 provided with a control device for controlling the swill heat sterilizer 1, a switch for operating a motor 93, and the like. An operation panel for operation is provided.

The treatment tank 2 is a tank for stirring the swill that has been put into the treatment tank 2 and heat-sterilizing the swill. The treatment tank 2 is a hollow columnar cylinder in which the upper and lower ends of the cylindrical side plate 20 are sealed by the upper plate 21 and the bottom plate 22, respectively, and is formed by using a material that is not easily corroded such as stainless steel and is supported by the gantry 11. Has been done.

The upper plate 21 of the processing tank 2 is provided with a swill inlet 211 and a ventilation port 12 that can be opened and closed by the lid 212, and the lower part of the side plate 20 of the treatment tub 2 is provided with a lid 214 to take out the swill that can be opened and closed. A mouth 213 is provided. Further, although not shown, the bottom of the treatment tank 2 may be provided with an openable / closable discharge port for draining excess water in the treatment tank 2.

Further, although not shown, an air supply fan that sends air into the processing tank 2 is installed on the upper plate 21 of the processing tank 2, and the air inside the processing tank 2 contains oxygen by the air supply fan. It may be configured to send to. Further, the air in the treatment tank 2 moves from the tank exhaust port to the deodorizer, passes through the dustproof filter installed in the deodorizer and the adsorbent-containing filter such as zeolite, and goes out of the food waste heat sterilizer 1 from the exhaust port. It may be configured to be discharged. By installing and adjusting an air supply fan, a tank exhaust port, a ventilation port, a deodorizer, etc., it is possible to adjust the air pressure in the processing tank 2 to a positive pressure or a negative pressure state.

In the processing tank 2, a vertical rotation shaft 3 is installed at the center of the circular bottom plate 22 of the processing tank 2. The rotating shaft 3 is a shaft for rotating the stirring blade 4 fixed to the rotating shaft 3, and penetrates through holes 23 provided in the upper plate 21 and the bottom plate 22 of the processing tank 2 respectively, and is formed in the processing tank 2. It is rotatably supported by a bearing 91 provided on the outside of the bottom plate 22 and a bearing 92 provided on the upper plate 21 of the processing tank 2. The gap between the rotating shaft 3 and the through hole 23 is sealed by a sealing member to ensure the airtightness of the processing tank 2. Further, a motor 93, which is a power generator of the rotating shaft 3, is installed on the outside of the bottom plate 22 of the processing tank 2, and although not shown, the lower end of the rotating shaft 3 is connected to the transmission shaft by a chain coupling. Further, the transmission is connected to the rotating shaft of the motor 93, and the rotating shaft 3 is rotated by the rotation of the motor 93.

The stirring blade 4 is a member for stirring the swill in the processing layer 2, one end of which is fixed to the rotating shaft 3, orthogonal to the rotating shaft 3, and extended in the direction of the side plate 20 of the processing tank 2. There is. The stirring blade 4 rotates horizontally in the processing layer 2 with the rotation of the rotating shaft 3.

As shown in FIGS. 1 to 3, two stirring blades 4 are provided at the same height of the rotating shaft 3 at an angle of 180 ° about the rotating shaft 3, and the stirring blades 2 are vertically provided with the processing tank 2. Three stages are provided in parallel with the bottom plate 22, and each stage is installed so as to be offset by 90 ° in the rotation direction of the rotating shaft 3. The length of the stirring blade 4 is not particularly limited, but it is preferable that the length is closer to the side plate 20 of the processing tank 2 in order to improve the stirring efficiency. The number of agitating blades 4 installed, the installation interval, and the number of installation stages are not particularly limited, and one stage or a plurality of two or more stages are changed according to the height (depth) of the processing layer 2. The number of installations at the same height of the rotating shaft 3 may be one or a plurality of radial shafts may be provided, and when a plurality of stages are provided, they may be provided at the same interval, but at different intervals. It may be provided in. Further, when a plurality of stages of the stirring blades 4 are provided at different heights, the number of installations, the installation interval, and the installation position may be the same for each stage, but they may be different.

Further, the stirring blade 4 may be installed diagonally upward or diagonally downward from the rotating shaft 3 at different angles with respect to the bottom plate 22 of the processing tank 2, instead of being provided horizontally, and a plurality of stirring blades 4 may be installed. When installing, the angle with the rotating shaft 3 may be the same, but may be different.

The shape of the stirring blade 4 is not particularly limited, and a flat plate, a rod-shaped body, or the like can be used. It is preferably composed of a hollow square prism having a rectangular surface. In particular, since a stronger force is applied to the fixed portion with the rotating shaft 3, the configuration may be changed from that of other portions to further increase the strength. As one embodiment, as is well shown in FIG. 4, the fixed portion of the stirring blade 4 with the rotating shaft 3 can be formed of a hollow square prism, and the other portion can be formed of a hollow triangular prism.

The fixed blade 5 is a member for sandwiching and crushing the swill between the fixed blade 5 and the stirring blade 4, a member for assisting the stirring of the swill of the stirring blade 4, and one end of the processing tank 2 It is fixed to the inner side surface 24 of the side plate 20 and extends horizontally in the three directions of the rotation axis. Further, the fixed blades 5 correspond to the stirring blades 4 and are arranged alternately above and below the stirring blades 4 in a side view, and are installed so as to be in parallel with the stirring blades 4 and in sliding contact with each other or at a predetermined interval. The length of the fixed blade 5 is not particularly limited as long as it overlaps with the stirring blade 4 in a plan view, but it is preferably a length closer to the rotating shaft 3 in order to improve the stirring efficiency. The fixed blade 5 is not limited to horizontal installation, and is installed so that the tilt angle of the stirring blade 4 corresponds to the tilt angle of the stirring blade 4 and the tilt angle with respect to the bottom plate 22 is the same as the tilt angle of the stirring blade 4.

As shown in FIGS. 1 to 3, three fixing blades 5 are provided at the same height of the inner side surface 24 of the side plate 20 at intervals of 120 ° about the rotating shaft 3, respectively, and the treatment tanks 2 are provided above and below. Two steps are provided in parallel with the bottom plate 22 of the above, and the upper and lower steps are installed so as to be offset by 60 ° in the rotation direction of the rotation shaft 3. The number of fixed blades 5 installed, the installation interval, and the number of installation stages are not particularly limited, and one stage or a plurality of two or more stages are changed according to the height (depth) of the processing layer 2. The steps may be provided between the stirring blades 4 above or below, and the number of the processing layers 2 installed at the same height may be one or a plurality of stages radially around the rotating shaft 3. May be. Further, when a plurality of fixed blades 5 are provided at different heights, the number of installations and the installation position may be the same for each stage, but they may be different.

The shape of the fixed blade 5 is not particularly limited, and a flat plate, a rod-shaped body, or the like can be used. It is preferably composed of a hollow columnar body such as a hollow square column having a rectangular surface. In particular, since a stronger force is applied to the portion fixed to the inner side surface 24 of the treatment tank 2, the configuration may be changed from that of the other portions to further increase the strength. As one embodiment, as is well shown in FIGS. 5 and 6, the fixed portion of the fixing blade 5 with the inner side surface 24 of the processing tank 2 is composed of a hollow square prism, and the other portion is composed of a hollow triangular prism. There is.

Inside the treatment tank 2, a steam nozzle 6 for supplying steam for heat sterilization and disinfection of swill is provided. The steam nozzle 6 is configured to include a nozzle portion 61 for ejecting steam and a pipe portion 62 for sending steam to the nozzle portion 61, and the pipe portion 62 penetrates the treatment tank 2 and is provided outside the treatment tank 2 (not shown). It communicates with the boiler, which is a steam generator, via the pipe 69 and the pipe 66. As the steam generator, a superheated steam generator may be used in addition to the boiler.

The temperature of the steam ejected from the steam nozzle 6 can be sterilized and disinfected by heating the swill to 90 ° C. or higher together with the function of the steam chamber 8 described later when the steam chamber 8 is installed. The temperature may be any temperature, preferably 100 ° C. or higher, more preferably 110 to 150 ° C., still more preferably 120 to 140 ° C., but may be higher. On the other hand, when the temperature of steam is 200 ° C. or higher, the swill becomes too dry and unsuitable as feed, which is not preferable. The steam supplied from the steam nozzle 6 may be saturated steam or superheated steam.

The installation position of the steam nozzle 6 is not particularly limited as long as the steam supplied from the steam nozzle 6 can directly hit the swill, but in order to shorten the distance to the swill and to increase the fixing strength. It is preferably installed on the fixed blade 5. The number of steam nozzles 6 to be installed is not particularly limited, and may be provided to, for example, all the fixed blades 5, but may be provided only to some of the fixed blades 5.

When the fixing blade 5 is a flat plate, a rod-shaped body, an L-shaped angle, or the like, the steam nozzle 6 is installed at a position where the pipe portion 61 is placed along the fixing blade 5 and does not come into contact with the stirring blade 4, and is fixed as necessary. It is fixed to the blade 5. When the fixed blade 5 is a hollow columnar body, the steam nozzle 6 is preferably installed in the internal space 50 of the fixed blade 5 in order to protect it from being pressed by food waste. When the steam nozzle 6 is installed in the internal space 50, as shown well in FIG. 5, the nozzle portion 61 is arranged facing the through hole 59 formed in the fixed blade 5, and the steam ejected from the nozzle portion 61. Passes through the through hole 59 and hits the garbage.

A temperature sensor 7 for measuring the temperature of the swill may be installed inside the processing tank 2. The temperature sensor 7 is preferably installed on the fixing blade 5 in order to increase the fixing strength. When the fixing blade 5 is a flat plate, a rod-shaped body, an L-shaped angle, or the like, the temperature sensor 7 is installed along the fixing blade 5 at a position where the sensor portion 71 does not come into contact with the stirring blade 4, and is fixed as necessary. It is fixed to the blade 5. When the fixed blade 5 is a hollow columnar body, as is well shown in FIG. 6, the temperature sensor 7 is preferably installed in the internal space 50 of the fixed blade 5 in order to protect it from being pressed by food waste.

The temperature of the food waste measured by the temperature sensor 7 may be confirmed by an operation panel or the like, and the timing of supplying steam to the steam nozzle 6 and / and the steam chamber 8 described later based on the measured temperature. , The supply amount and the temperature may be automatically controlled by a control device (not shown). The temperature sensor 7 may be configured by installing only one, but may be configured by providing a temperature sensor 76 for steam nozzle control and a temperature sensor 77 for steam chamber control, and two temperature sensors 76 and 77 are provided. In this case, the supply of steam to the steam nozzle 6 and the steam chamber 8 can be controlled separately by each sensor.

In the embodiment shown in the figure, three fixing blades 5 are installed in each of the lower and upper stages, and the fixing portion of each fixing blade 5 with the processing tank 2 is composed of a hollow square prism, and the other parts are formed of a hollow square prism. It is composed of hollow triangular prisms. Then, steam nozzles 6 are installed in each of the hollow internal spaces 50 of the three fixed blades 5 in the lower stage, and through holes 59 formed in the horizontal pieces 51 of the fixed blades 5 facing the bottom plate 22 of the processing tank 2. The nozzle portion 61 is arranged facing the surface. Further, temperature sensors 76 and 77 are installed in the hollow inner 50 of the upper fixing blade 5. The steam nozzle 6 may be installed on the upper fixed blade 5 and the temperature sensor 7 may be installed on the lower fixed blade 5, or the steam nozzle 6 and the temperature sensor 7 may be installed on the fixed blade 5 on the same stage. You may.

The outer surface 25 of the treatment tank 2 is provided with a steam chamber 8 to which steam is supplied and filled to heat sterilize and disinfect the inside of the treatment tank 2 and the swill. As the steam chamber 8, a side steam chamber 81 provided on a part or all of the outer surface 25 of the treatment tank 2 and a bottom steam chamber 82 provided on the outer bottom of the treatment tank 2 can be installed. It is possible to install either the side steam chamber 81 or the bottom steam chamber 82, but it is preferable to provide both because the heat sterilization efficiency is good. Further, although the steam chamber 8 may not be provided, it is preferable to provide the steam chamber 8 for the purpose of the present invention such as improving the efficiency of the heat sterilization treatment of swill.

The side steam chamber 81 is formed in an annular shape on the outer surface 25 of the treatment tank 2 over the circumference. The side steam chamber 81 may be configured by winding a tubular body around the outer surface 25 of the processing tank 2 in a plurality of turns. Further, in the embodiment shown in the figure, only one side steam chamber 81 is installed, but two or more may be installed. The bottom steam chamber 82 is formed in an annular columnar shape in a plan view at the bottom of the treatment tank 2.

The side steam chamber 81 and the bottom steam chamber 82 communicate with a boiler (not shown) provided outside the treatment tank 2 via a pipe 66, a pipe 68, and a pipe 65. Specifically, the pipe 66 from the boiler, which is a steam generator, branches, one becomes a pipe 69 that communicates with the steam nozzle 6, and the other becomes a pipe 68 that communicates with the side steam chamber 81, and the side steam chamber 81 and the bottom steam chamber. The 82 communicates with the pipe 65, and the outlet pipe 64 connected to the bottom steam chamber 82 communicates with the steam trap 95. As described above, the steam generator may be configured to use a superheated steam generator in addition to the boiler.

The steam generated by heating and boiling water taken in from the outside by the boiler enters the side steam chamber 81 through the pipe 66 and the pipe 68, enters the bottom steam chamber 82 from the side steam chamber 81 through the pipe 65, and enters the bottom steam. It enters the steam trap 95 from the chamber 82 through the outlet pipe 64, becomes steam and water, and is discharged to the outside of the food waste heat sterilizer 1.

The temperature of the steam introduced into the annular steam chamber 81 and the bottom steam chamber 82 heats the food waste to 90 ° C. or higher together with the action of the steam supplied from the steam nozzle 6 to the inside of the processing tank 2 to sterilize the food waste. The temperature may be any temperature that can be sterilized, preferably 100 ° C. or higher, and may be the same as or higher than the temperature supplied from the steam nozzle 6. The pipe may be branched using one boiler to supply steam to the steam nozzle 6 and the steam chamber 8, but two boilers may be used to connect the steam nozzle 6 and the steam chamber 8 to each other. It may be configured as such. Further, the superheated steam generator may be installed only in the pipe communicating with the steam chamber 8.

Further, it is preferable to install a heat insulating material 19 that covers the treatment tank 2 and / and the steam chamber 8 in the swill heat sterilizer 1. The heat insulating material 19 is installed to keep the steam chamber 8 warm, and covers the surface of the steam chamber 8 that is installed on the outer surface of the treatment tank 2 and is not in contact with the treatment tank 2. Further, the heat insulating material 19 may be installed on a part or all of the outer surface such as the outer surface 25 and the upper surface 21 of the treatment tank 2 in order to keep the heat of the treatment tank 2. The heat insulating material 19 can prevent a decrease in the temperature of the steam supplied to the treatment tank 2 and the steam chamber 8 and a decrease in the temperature in the treatment tank 2, and can improve the heat sterilization efficiency of the swill. The material of the heat insulating material 19 is not particularly limited, but rock wool can be used.

Next, the use and operation of the swill heat sterilizer 1 will be described. First, the swill is charged into the processing tank 2 from the charging port 211. Next, the operation panel is operated to obtain electric power from a power source (not shown) to operate the motor 93 to rotate the rotating shaft 3 to rotate the stirring blade 4, and agitate the swill in the processing tank 2.

In parallel, the temperature of the food waste is measured by the temperature sensor 76 for controlling the steam nozzle and the temperature sensor 77 for controlling the steam chamber, and if the temperature is below a predetermined temperature, the steam is supplied from the steam nozzle 6 and / or The supply of steam to the steam chamber 8 is started. Specifically, water taken in from the outside in a boiler is heated and boiled to generate steam. Then, the steam generated in the boiler is further superheated by the superheated steam generator as needed, and is sent to the side steam chamber 81 through the pipe 66 and the pipe 68, and the steam supplied to the side steam chamber 81 is the treatment tank. Heat the inside of 2 and the food waste. And the garbage is sterilized and disinfected. Further, steam is sent from the side steam chamber 81 through the pipe 65 to the bottom steam chamber 82, and the steam supplied to the bottom steam chamber 82 heats the inside of the treatment tank 2 and the swill. In this way, the garbage is sterilized and disinfected. At the same time, the steam generated in the boiler is sent to the steam nozzle 6 through the pipe 66 and the pipe 69, is ejected from the nozzle portion 61 through the pipe portion 62, is supplied, and is directly applied to the swill to heat the swill directly. do. Then, the food waste is sterilized and disinfected by steam.

In this way, the swill is agitated in the treatment tank 2 and steam is supplied into the treatment tank 2, but the stirring by the rotation of the stirring blade 4 may be continuous or intermittent. The water vapor may be supplied when the stirring blade 4 is stirring, or when the rotation of the stirring blade 4 is intermittent and temporarily stopped.

Further, the temperature of the food waste is measured by the temperature sensor 76 for controlling the steam nozzle and the temperature sensor 77 for controlling the steam chamber, and when the temperature is above a predetermined temperature, the steam is supplied from the steam nozzle 6 and / or the steam chamber. Stop the supply of steam to 8. The steam that has entered the bottom steam chamber 82 passes through the outlet pipe 64, enters the steam trap 95, becomes steam and water, and is discharged to the outside of the swill heat sterilizer 1. Water in which steam is condensed in the side steam chamber 81, the pipe 65, and the bottom steam chamber 82 is also discharged in the same flow path as the steam.

In this way, the steam supplied from the steam nozzle 6 momentarily directly heats and sterilizes the swill, and the steam chamber 8 heats the air and the swill in the treatment tank 2 and the treatment tank 2. Maintain the temperature of heated food waste. And the garbage continues to be sterilized, sterilized and disinfected for a certain period of time. In order to maintain the temperature of the swill at a certain temperature or higher for a certain period of time, it is preferable that the steam is continuously supplied to the steam chamber 8 and the steam is intermittently supplied from the steam nozzle 6. The supply of steam from the steam nozzle 6 is not performed for the entire time during which the swill is agitated or for the entire time for which a constant temperature is desired to be maintained, but is temporarily for heating the swill directly in an instant. In addition, it is preferable to perform it intermittently as needed.

The temperature at which the supply of steam from the steam nozzle 6 by injection is started and the temperature at which the supply of steam to the steam chamber 8 is started may be the same temperature, but may be different, and the supply of steam from the steam nozzle 6 is stopped. The temperature at which the steam is applied and the temperature at which the supply of steam to the steam chamber 8 is stopped may be the same, but may be different. Further, the supply of steam from the steam nozzle 6 may be stopped after a predetermined time from the injection. Further, the supply of steam from the steam nozzle 6 and / or the control of the supply of steam to the steam chamber 8 is performed based on the temperature of the food waste, but it may be manual or the temperature measured by the temperature sensor 7. Depending on the situation, it may be automatically controlled by a control device.

In this way, the swill is agitated by the stirring blade 4 while being maintained at a certain temperature or higher for a certain period of time, and the swill is efficiently sterilized by heating, and sterilized and disinfected with sufficient heat. Normally, the stirring blade 4 is repeatedly rotated and stopped at predetermined intervals, but it may be continuously rotated. During stirring, hard and soft solids such as bones, shells, and disposable chopsticks in the swill are crushed by being sandwiched between the stirring blade 4 and the fixing blade 5. Further, the air in the treatment tank 2 moves from the tank exhaust outlet to the deodorizer, passes through the dustproof filter installed in the deodorizer and the adsorbent-containing filter such as zeolite, and is deodorized and collected, and is odorless and non-existent. The dusty air is discharged to the outside of the food waste heat sterilizer 1 from the exhaust port.

1 Garbage heat sterilizer 11 Stand 12 Ventilation port 2 Treatment tank 20 Side plate 21 Top plate 22 Bottom plate 24 Inner side surface 25 Outer side surface 3 Rotating shaft 4 Stirring blade 5 Fixed blade 50 Internal space 6 Steam nozzle 61 Nozzle part 62 Pipe part 7 Temperature Sensor 8 Steam chamber 81 Side steam chamber 82 Bottom steam chamber 93 Motor

Claims (9)

It is characterized by installing a stirring mechanism for stirring the swill and a steam nozzle for supplying steam for heat sterilizing the swill in the processing tank in which the swill is sterilized by heating. Swill heat sterilizer. The swill heat sterilizer according to claim 1, wherein a steam chamber to which steam is supplied is provided on the outer surface of the treatment tank to heat sterilize the swill in the treatment tank. .. The stirring mechanism includes a rotating shaft, a stirring blade fixed to the rotating shaft, and a fixed blade fixed to the inner surface of the processing tank, and the steam nozzle is installed on the fixed blade. The food waste heat sterilizing apparatus according to claim 1 or 2. The food waste heat sterilizer according to claim 3, wherein the fixed blade is formed of a hollow columnar body, and the steam nozzle is installed in the internal space of the fixed blade. The food waste heat sterilizer according to any one of claims 1 to 4, wherein a temperature sensor for measuring the temperature of the food waste is installed in the processing tank. The food waste heat sterilizer according to any one of claims 1 to 5, wherein a heat insulating material for covering the treatment tank and / and the steam chamber is installed. It is characterized by stirring the swill in the treatment tank where the swill is heat sterilized, supplying steam to the treatment tank, directly applying steam to the swill, and sterilizing the swill directly with steam. Swill disposal method. The food waste treatment method according to claim 7, wherein steam is supplied to a steam chamber installed on the outer surface of the treatment tank, and the food waste in the treatment tank is sterilized by heating. The food waste treatment method according to claim 7 or 8, wherein the temperature of the food waste is measured by a temperature sensor, and the supply of water vapor is controlled based on the temperature of the food waste.

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