JP3835551B2 - Treatment equipment using atmospheric superheated steam as a heat source - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a processing apparatus that performs heating and drying treatment using superheated steam as a heat source under normal pressure (atmospheric pressure), for example, heat treatment of combustible waste and garbage, food heating, drying treatment, and frozen food. The present invention relates to a processing apparatus that performs thawing processing, sterilization of various products including food, and sterilization processing. Note that superheated steam is obtained by adding heat to saturated steam, and means steam having a temperature higher than 100 ° C. at atmospheric pressure (760 mmHg).
[0002]
[Prior art]
Conventionally, kerosene, gas, and electricity are generally used as the heat source of this type of treatment apparatus. For example, in the case of dry carbonization by heating as a treatment method for combustible waste or garbage, heat drying by hot air or burner flame, and in the case of exhaust gas treatment, combustion by burner flame or electric heater However, there are inconveniences that the processing time usually requires about 10 hours per cycle, and harmful substances are generated in the combustion process. In order to eliminate this inconvenience, it has been proposed to use superheated steam, which is clean energy, as a heat source. As a superheated steam generator, an insulating material is interposed around a container containing water or steam. There is known a superheated steam generator using an induction heating method in which a coil is wound and water or steam in a container is heated by applying a high-frequency voltage to the coil to produce superheated steam. (For example, refer to Patent Document 1).
[0003]
[Patent Document 1]
US Pat. No. 5,773,797
[Problems to be solved by the invention]
According to the above conventional superheated steam generator, a container with a large capacity is required to obtain a sufficient amount of superheated steam. On the other hand, if it is not always cooled below a certain temperature, the thermal efficiency is lowered. Cooling is required, and since it takes a large amount of power and time proportional to the amount of water and steam to make superheated steam, it is difficult to efficiently obtain a sufficient amount of superheated steam. was there. It is an object of the present invention to provide a processing apparatus using superheated steam as a heat source under normal pressure, which solves this problem.
[0005]
[Means for Solving the Problems]
To this end, the processing apparatus for a heat source of atmospheric pressure superheated steam according to claim 1 according to the present invention, the top plate, the bottom plate has a peripheral wall, the inlet of the workpiece on the top, the outlet of the workpiece in the lower, a substantially cylindrical processing chamber having respective stirring mechanism for stirring the treated product in the center, placed in this treatment chamber, one end opened in the processing chamber overheat It becomes a steam discharge port, and the other end penetrates the processing chamber in an airtight and insulated state and opens, and serves as an introduction port for introducing steam or mist-like water that becomes superheated steam and along the inner peripheral wall of the processing chamber. And a pipe heater that is heated to superheated steam by heating the steam or mist-like water introduced by applying a voltage, and located between the pipe heater and the stirring mechanism, and has a diameter increased. Make sure that the upper and lower ends do not close the inlet and outlet. Fixed a cylindrical cover having a large number of vent holes, the processing after having deodorized and filtered through a developing that sucks superheated steam or gas in the processing chamber to the intake reflux pipe by a blower to move the intake reflux pipe to a circulating mechanism for supplying again the room, the applied voltage, the supply amount of such steam, sets the working conditions such as processing time, Ri Do and a control unit for controlling so as to maintain the setting condition, the stirring mechanism, the process A rotating shaft that is pivotally supported by the center of the bottom plate of the chamber and extends upward, a rotating stirring blade attached to the rotating shaft, and a stirring and agitating member attached to the rotating shaft along the bottom plate below the rotating stirring blade. It consists of discharge blades .
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a preferred embodiment when the present invention is applied to a garbage disposal apparatus will be described in detail with reference to the accompanying drawings. Here, FIG. 1 is a partial sectional view showing the entire apparatus, and FIG. 2 is a block diagram showing a processing system.
[0007]
As shown in FIG. 1, the garbage processing apparatus 1 is provided with an input port 2 that is an input part for processing garbage (not shown) at the upper end of the peripheral wall 5a, and is heated and dried. A discharge port 3 is provided at the lower end of the peripheral wall 5a, and a rotary shaft 4a of the rotary stirring blade 4 provided with three stirring blades 4b as a stirring mechanism is vertically rotatable at the center of the bottom plate 5b. The processing chamber 5 is supported by the above. In addition, the charging port 2 and the discharge port 3 are provided with lid bodies 6 and 7 each of which can be opened and closed and which are provided with a known lock mechanism (not shown).
[0008]
The processing chamber 5 is made of a conductive material such as stainless steel and is substantially cylindrical with both upper and lower surfaces closed. The peripheral wall 5a, the bottom plate 5b, and the top plate 5c are covered with a well-known heat insulating material 40. Is grounded. Further, an observation window 41 for confirming the internal state is provided at the upper end of the peripheral wall 5a of the processing chamber 5, and the bottom plate 5c of the processing chamber 5 is extracted from the processing object by thermal decomposition accumulated inside. A drain 39 for discharging a liquid such as water is provided.
[0009]
The rotating shaft 4a of the rotating stirring blade 4 passes through the bottom plate 5b of the processing chamber 5 in an airtight state, and is connected to the worm gear 9 through a plurality of gears (not shown) at the penetrating end. Meshes with the worm 8. One end of the rotary shaft 8a to which the worm 8 is fixed is rotatably supported by a bearing 11 provided on a support base 10 that supports the processing chamber 5 via a plurality of support legs 34, and the other end is a drive shaft of the drive motor 12. It is linked to. The rotary stirring blade 4, the worm 8, the worm gear 9, the bearing 11, and the drive motor 12 constitute a stirring mechanism. Further, a stirring and discharging blade 13 is provided at the lowermost end of the rotating shaft 4a along the bottom plate 5b.
[0010]
In the processing chamber 5, a pipe heater 14 made of a conductive material such as Inconel, Hastelloy, or stainless steel is disposed spirally along the peripheral wall 5 a, and the pipe heater 14 is secured by a number of holding insulators 15 made of an insulating material. It is fixed to the peripheral wall 5a. One end of the pipe heater 14 opens in the processing chamber 5 to become a superheated steam discharge port 16, while the other end penetrates the processing chamber 5 through a holding pipe 17 made of an insulating material in an airtight and insulating state. A supply pipe (not shown) for supplying steam that becomes superheated steam from a boiler 35 (see FIG. 2) is connected via a connector 18. The connection opening end serves as an introduction port for introducing the steam into the pipe heater 14.
[0011]
The pipe heater 14 is provided with a heat radiating plate 19 and a power supply terminal 20 in the vicinity of the holding tube 17 outside the processing chamber 5, while a terminal rod 21 electrically connected to the peripheral wall 5 a of the processing chamber 5 is provided outside the processing chamber 5. The terminal rod 21 is also provided with a heat sink 22 and a power terminal 23. The end of the superheated steam outlet 16 of the pipe heater 14 is electrically connected to the processing chamber 5 that is grounded. By applying a positive voltage to the power supply terminal 20 from a commercial power supply (not shown) via a power transformer 36 (see FIG. 2) and applying a negative voltage to the power supply terminal 23, the pipe heater 14 is heated, The steam introduced into the heater 14 from the inlet is used as superheated steam, and this superheated steam is discharged from the superheated steam outlet 16 into the processing chamber 5.
[0012]
Between the pipe heater 14 and the rotary stirring blade 4, a cylindrical cover 24 whose upper and lower ends are enlarged is disposed so that garbage does not directly touch the pipe heater 14, and the upper and lower ends are disposed in the processing chamber. 5 is fixed to the peripheral wall 5a. Although this cover 24 is only partially shown in FIG. 1, a large number of small holes are provided substantially uniformly except for its upper end.
[0013]
One end of an intake recirculation pipe 29 that opens as an intake port 25 is penetrated and fixed to the lower part of the peripheral wall 5a of the processing chamber 5, and the other end of the intake recirculation pipe 29 is fixed to the top plate 5c. It is open. The intake recirculation pipe 29 is provided with a filter 38 provided with a filter, a blower 28, an exhaust regulating valve 27, and an oxidation catalyst type deodorizer 26 provided with a filter in order from the intake port 25 side. Yes.
[0014]
Thus, the superheated steam and dry distillation gas in the processing chamber 5 sucked from the intake port 25 by the action of the blower 28 is deodorized and filtered by the deodorizer 26 and then supplied again into the processing chamber 5. The blower 28 is installed on a mounting table 30 fixed to the support table 10. The intake port 25, the filter 38, the blower 28, the exhaust adjustment valve 27, the deodorizer 26, and the intake recirculation pipe 29 constitute a circulation mechanism.
[0015]
Further, an IC for controlling to maintain the set work conditions by inputting and setting work conditions such as a voltage to be applied through the power terminals 20 and 23, a supply amount of steam to the pipe heater 14, and a processing time with a key and a volume. A control box 31 that includes a circuit and accommodates a power supply transformer 36 and a controller 37 (see FIG. 2), which is a controller electrically connected to a steam supply control valve (not shown), is provided. Further, the controller 37 can set the temperature at the time of discharging superheated steam in a range of about 100 ° C. to 1100 ° C.
[0016]
In addition, a plurality of casters 32 are provided on the support base 10 to facilitate the movement of the processing apparatus 1, while a plurality of fixed legs 33 are extended and contacted to the floor surface during work, as shown in FIG. The caster 32 is levitated from the floor surface to fix the processing apparatus 1 in a stable state.
[0017]
Next, garbage processing performed using the above-described garbage processing apparatus 1 will be described. First, work conditions are input and set in the controller 37, a predetermined voltage is applied to the pipe heater 14 from the power transformer 36 connected to the power source via the power terminals 20 and 23, and the pipe heater 14 reaches a predetermined temperature, for example, 150 ° C. At that time, steam is introduced from the boiler 35 into the pipe heater 14, and the steam is superheated and discharged into the processing chamber 5. When the inside of the processing chamber 5 reaches a predetermined temperature, for example, 400 ° C., the lid 6 is opened and an appropriate amount of garbage, which is a processed material, is input from the input port 2, and the drive motor 12 is started to rotate the rotating stirring blade 4. It rotates and heats and dries with superheated steam, stirring garbage with the stirring blade 4b and the stirring and discharge blade 13. Note that the temperature in the processing chamber 5 is generated not only by the superheated steam but also by the pipe heater 14 itself, and rises quickly due to the combined heat transfer action.
[0018]
The dry distillation gas generated from superheated steam and raw garbage in the processing chamber 5 is sucked into the intake recirculation pipe 29 from the intake port 25 by the suction action of the blower 28, deodorized and filtered by the deodorizer 26, and then into the processing chamber 5. Supply again. Thus, by circulating and using superheated steam, it is possible to save energy in the heat source, and efficient heating and drying operations can be performed. Further, the gas with odor generated from the raw garbage is thermally decomposed in the processing chamber 5 and then filtered when passing through the intake port 25, and further deodorized and filtered when passing through the deodorizer 26. By repeating the operation of returning to the inside and thermally decomposing again, the odor and impurities are removed. The treated gas and superheated steam can be released by opening the exhaust regulating valve 27 as necessary.
[0019]
During this process, the inside of the processing chamber 5 is in a low oxygen state due to the characteristics of the superheated steam, so that garbage and generated dry distillation gas are not combusted and no harmful substances are generated due to combustion. And after the predetermined time, the garbage in the processing chamber 5 will be in a dry state. Although the process can be terminated in this dry state, the process can be terminated as a carbonized state if the processing operation is further continued. The processed garbage can be taken out by opening the door 7 of the discharge port 3. This take-out operation can be easily performed by taking out the processed product that has moved to the vicinity of the discharge port 3 by the rotation of the stirring and discharge blade 13.
[0020]
The processed product is reduced in volume, reduced in volume, sterilized, and can be used as a safe resource for animal feed such as livestock, plant fertilizer such as farm products, deodorant, or soil conditioner. Here, the reason why the heat treatment with superheated steam has a sterilizing action is that the drying rate is high, the surface of the treated product is hardly hardened, and the dried product becomes porous.
[0021]
In addition, this invention is not limited to the said embodiment at all, For example, if it applies to the thawing | decompression process of frozen food as a processing apparatus, the thawing | decompression processed material with a juicy feeling can be obtained. In addition, when applied to cooking, the starch can be made into high-quality alpha, and there is little destruction of physical properties, and since the treatment is performed under a low oxygen state, a cooked product that has good preservation and does not impair the texture can be obtained. Furthermore, for sterilization treatment or sterilization treatment for various cereals such as beans and strawberries, liquid food and drink materials such as various juices, milk and drinking water, water treatment plants, food processing facilities, various containers, medical equipment, etc. Is also applicable.
[0022]
Alternatively, the inlet 2 can be provided in the top plate 5 c of the processing chamber 5, and the outlet 3 can be provided in the bottom plate 5 b of the processing chamber 5. In this case, the processing apparatus 1 can be further downsized . Et al of the pipe heater 14, parallel also placed to isosamples provided two systems. Furthermore, instead of steam, the pipe heater 14 can be supplied with mist water to form superheated steam. In addition, in processing, after the processing object is put into the processing chamber 5, a voltage may be applied to start the operation.
[0023]
【The invention's effect】
As described above, according to the processing apparatus according to claim 1 of the present invention, clean heat energy called superheated steam is used as a heat source, high temperature heating can be performed in a low oxygen atmosphere under normal pressure instead of combustion processing, and thermal efficiency is improved. Well, it can be processed in a short time, has a sterilization and sterilization action , and the pipe heater is placed in the processing chamber, so the thermal efficiency is further improved and the processing efficiency is further improved by providing a stirring mechanism. In addition, the processed material introduced from the upper charging port is easily discharged from the discharge port to the outside by the stirring and discharge blade after the processing, and the cover is provided so that the processed material touches the pipe heater. There is an effect that there is nothing .
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional view showing an entire processing apparatus.
FIG. 2 is a block diagram showing a processing system.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Garbage disposal apparatus 2 Input port 3 Discharge port 4 Rotation stirring blade 5 Processing chamber 8 Worm 9 Worm gear 11 Bearing 12 Drive motor 14 Pipe heater 16 Superheated steam discharge port 20, 23 Power supply terminal 25 Inlet 26 Deodorizer 27 Exhaust adjustment Valve 28 Blower 29 Intake recirculation pipe 35 Boiler 36 Power transformer 37 Controller

Claims (1)

Top plate, the bottom plate has a peripheral wall, the inlet of the upper treated, substantially cylindrical processing with each outlet of the workpiece is in the center of the stirring mechanism for stirring the treated to the lower And one end opened in the processing chamber to be a superheated steam discharge port, and the other end is opened through the processing chamber in an airtight and insulated state to form a superheated steam or mist. A pipe that serves as an inlet for introducing water in the form of a pipe and is disposed in a spiral shape along the inside of the peripheral wall of the processing chamber, and heats the steam or mist-like water introduced by applying a voltage to form superheated steam. A cylindrical cover having a heater and a large number of vent holes which are located between the pipe heater and the stirring mechanism and whose upper and lower ends are fixed to the peripheral wall so as not to close the inlet and outlet. If, intake superheated steam or gas in the processing chamber by a blower A circulation mechanism that is deodorized and filtered while moving through the intake pipe and sucked into the recirculation pipe, and supplies the processing chamber again, and working conditions such as applied voltage, supply amount of steam, and processing time are set. , Ri Do and a control unit for controlling so as to maintain the setting condition, the stirring mechanism, the rotation shaft, rotary stirring attached to the rotary shaft which is rotated extends upward is supported by a bottom plate center of the processing chamber A processing apparatus using normal pressure superheated steam as a heat source, comprising a blade and a stirring and discharging blade attached to the rotating shaft along the bottom plate below the rotating stirring blade .

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