JP2005066449A - Garbage treating method and apparatus therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a garbage treating method and an apparatus therefor by which completion of garbage drying and finish of garbage heating treatment can be made to coincide. <P>SOLUTION: Heating temperature by a heating means (a heater 32) in a treating tank 4 is set to a maximum heating temperature at an initial stage and to a minimum heating temperature at an final stage. The garbage 3 is heated by changing the heating temperature within the temperature range. Steam 40 generated in the treating tank by this heating treatment is made to pass a condensing means (a radiator 42) to separate condensed water 58 and the steam from which the condensed water is separated is circulated to the treating tank and temperature of the steam at an inlet side of the condensing means and temperature of the steam at an outlet side thereof are detected. In the case of heating at the minimum heating temperature, when temperature difference between the inlet side temperature and the outlet side temperature exceeds reference temperature value, the heating treatment is finished. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention relates to a garbage treatment for heating and drying garbage, and relates to a garbage treatment method and apparatus for realizing the completion of drying.

Garbage from kitchens contains a large amount of water, oil, fiber, etc., and if these are removed by drying, the amount can be reduced. The dried garbage can be easily disposed of as well as used as an organic fertilizer raw material. Prior patent documents relating to this garbage drying treatment include the following.
JP, 2002-355635, A In this patent document 1, when steam which circulates from a processing tub which heats garbage is circulated to a condensation means and it is made to cool, condensed water will separate from steam, but this condensed water is separated. A garbage disposal method and apparatus for returning the steam to the treatment tank are disclosed. In this treatment method and apparatus, when the temperature of the garbage in the treatment tank reaches a predetermined temperature, the amount of heat applied to the garbage is reduced, and heating is performed by the temperature difference between the inlet side temperature and the outlet side temperature of the condensing means. Control is in progress.

  By the way, raw garbage has qualitative differences such as some differences in oil content and moisture, and the result of the drying treatment differs depending on the external temperature, which is an external condition, in addition to the quality and quantity. Therefore, when judging the end of drying of garbage by referring to the outside air temperature and the inlet side temperature and outlet side temperature of the radiator that cools the steam generated during drying and separates condensed water from the steam, However, there is a disadvantage that the degree of dryness varies, for example, it is unsuitable as a fertilizer due to excessive drying and re-drying is necessary because of insufficient drying. In this case, a sensor for detecting the outside air temperature is necessary, and there is a disadvantage that the outside air temperature information is used for control. Such a problem is not disclosed in Patent Document 1 and no solution is presented.

  Accordingly, an object of the present invention is to provide a garbage disposal method and apparatus capable of ending the drying process upon completion of drying of garbage.

  In order to achieve the above object, the garbage processing method of the present invention is configured such that the heating temperature in the treatment tank 4 is set to the highest heating temperature in the initial stage and the lowest heating temperature in the final stage by the heating means (heater 32). The process of heating the garbage 3 by changing the heating temperature, and the condensed water 58 was separated from the steam 40 generated in the treatment tank by the heat treatment through the condensing means (radiator 42), and the condensed water was separated. A process of circulating the steam to the treatment tank, a process of detecting the inlet side temperature and the outlet side temperature of the steam of the condensing means, and the inlet side temperature and the outlet side temperature when heating at the minimum heating temperature And a process of terminating the heat treatment when the temperature difference with the reference temperature exceeds a reference temperature.

  In this garbage disposal method, the garbage put in the treatment tank is heated by a heating means, and the heating means may be in any form such as electric heat or combustion heat. The maximum heating temperature and the minimum heating temperature are set as the heating temperature of the garbage, and are changed within these temperature ranges. By such setting and changing of the heating temperature, the garbage is dried in the treatment tank without causing burning.

  And the vapor | steam which generate | occur | produced from the processing tank by the drying process of garbage is guided to a condensation means, and is returned to a processing tank, after being isolate | separated from condensed water. The condensed water generated in the condensing means depends on the cooling by the condensing means, which appears at the inlet side temperature and the outlet side temperature.

  Therefore, for the temperature difference between the inlet side temperature and the outlet side temperature of the condensing means, a reference temperature that is assumed to be dry is set, and when the difference temperature between the inlet side temperature and the outlet side temperature exceeds this reference temperature, When the heat treatment is completed, a stable dry state can be obtained. In other words, it is possible to absorb the difference in outside air temperature such as summer and winter, day and night without being affected by changes in the inlet side temperature and outlet side temperature of the condensing means, and to the change and variation in efficiency of the condensing means. Can be obtained, and a treated product having no variation in moisture content can be obtained.

  In order to achieve the above object, the reference temperature is the maximum temperature difference between the inlet side temperature and the outlet side temperature detected under the heating temperature before the transition to the minimum heating temperature, or the maximum temperature difference. A predetermined value may be added to the value. With such a configuration, it is possible to prevent undried food waste and to improve the uniformity of the dryness.

  In order to achieve the above object, the garbage processing apparatus of the present invention is provided with a heating means (heater 32), and a treatment tank 4 that heats the loaded garbage 3 and generated from the garbage in this treatment tank. A condensing means (radiator 42) for separating condensed water 58 from the steam 40, and a circulating means (circulation path 44) connected between the condensing means and the treatment tank for circulating the steam to the condensing means; Temperature detecting means (temperature sensors 66 and 68) for detecting the inlet side temperature and the outlet side temperature of the steam of the condensing means, and the heating temperature in the treatment tank by the heating means in the initial stage, the highest heating temperature, and the final stage And the heating temperature is varied within the temperature range to heat the garbage, and the entry side temperature and the exit side temperature under the heating temperature before shifting to the minimum heating temperature. Set the reference temperature to the differential temperature And a control means (control device 86) for terminating the heat treatment when the difference between the inlet side temperature and the outlet side temperature exceeds the reference temperature when heating at the minimum heating temperature. It is a configuration.

  In such a configuration, the treatment tank is a container that includes heating means and heats the loaded garbage. In the condensing means, condensed water is separated from the steam generated from the garbage in this treatment tank. The circulation means is connected between the condensing means and the treatment tank, and circulates the steam generated in the treatment tank to the condensation means. Further, the temperature detecting means detects the vapor inlet side temperature and the outlet side temperature of the condensing means as the drying process completion information. Then, the control means sets the heating temperature by the heating means in the treatment tank to the maximum heating temperature in the initial stage and the minimum heating temperature in the final stage, varies the heating temperature within the temperature range, heats the garbage, and also sets the minimum heating temperature. When the reference temperature is set to the difference temperature between the inlet side temperature and the outlet side temperature under the heating temperature before shifting to the temperature, and the heating is performed at the minimum heating temperature, the difference temperature between the inlet side temperature and the outlet side temperature is the reference temperature. When the value exceeds, the heat treatment is terminated.

According to such a configuration, the above-described garbage disposal method is realized, and a stable dry state can be obtained. As a result, differences in outside air temperature such as summer and winter, day and night are absorbed without being affected by changes in the inlet side temperature and outlet side temperature of the condensing means, and changes and variations in the efficiency of the condensing means are absorbed. In addition, a processed product with no variation in moisture content can be obtained.

  (1) According to the present invention, the heat treatment can be completed upon completion of drying regardless of the quality and amount of garbage and regardless of the outside air temperature, and a uniform drying treatment can be realized.

(2) Further, according to the present invention, it is possible to perform a drying process having a desired moisture content, so that it is possible to produce a non-burning fertilizer from garbage and facilitate the disposal process.

  An embodiment of the present invention will be described with reference to FIG. FIG. 1 shows an outline of a garbage disposal apparatus according to an embodiment of the present invention.

  In this garbage processing apparatus 2, for example, a container having a semi-cylindrical bottom surface is used as the treatment tank 4 in which the garbage 3 is accommodated as an object to be dried. A scraper 6 which is a stirring impeller as stirring means for stirring the garbage 3 is provided. The scraper 6 is, for example, one in which stirring blades 12 are attached to the tips of a plurality of arms 10 projecting radially on the rotating shaft 8, and both ends of the rotating shaft 8 are provided on bearings 14 provided on the side surfaces of the processing tank 4. Is supported rotatably. A pulley 18 for receiving a rotational force from the stirring motor 16 is attached to the rotating shaft 8, and a drive chain 22 is suspended between the pulley 18 and the driving pulley 20 on the stirring motor 16 side. . That is, as shown by arrows A and B, the scraper 6 is provided with a rotation having a rotation pattern such as desired rotation, continuous rotation, intermittent rotation, and forward / reverse rotation, as indicated by arrows A and B. By the rotation of the scraper 6, the garbage 3 in the treatment tank 4 is stirred and pulverized. In this embodiment, the agitation motor 16 is used as the rotation driving means of the scraper 6. However, a driving means such as an engine may be used. Instead of the pulley 18 and the driving pulley 20, the sprocket wheel and the chain are used as the rotation transmission means. Alternatively, a gear mechanism or the like may be used.

  An inlet 24 for loading the garbage 3 into the processing tank 4 is formed on the upper side of the processing tank 4, and a door 26 for opening and closing the inlet 24 is attached by a hinge 28 so as to be opened and closed. It has been. That is, the door 26 can be opened and closed with the handle 30 and, in the closed state, the processing tank 4 is maintained in a sealed state by a sealing means such as packing (not shown).

  A heater 32 is installed on the bottom surface of the treatment tank 4 as a heating means for the garbage 3 in the treatment tank 4. In the heater 32, a heating temperature that is changed stepwise or continuously within the temperature range between the maximum heating temperature and the minimum heating temperature is set as well as the maximum heating temperature and the minimum heating temperature. A temperature sensor 34 is installed as a means for detecting the heat generation temperature of the heater 32, that is, a first temperature detecting means. In other words, the temperature sensor 34 constitutes temperature detection means for detecting the heating temperature for the amount of heat applied to the garbage 3. In this embodiment, the heater 32 is installed along the curved surface of the processing tank 4. As the heating means, a burner or the like for burning oil or fuel gas may be used, and an engine or the like may be used as a heat source. Further, a temperature sensor 36 is attached to, for example, the outer surface of the side wall of the processing tank 4 as second temperature detection means for detecting the processing temperature in the processing tank 4, the tank wall temperature, and the like. When the treatment temperature of the garbage 3 exceeds the boiling temperature 100 ° C., the garbage 3 is easily burnt, and the treatment temperature and the tank wall temperature are detected by the temperature sensor 36.

  A radiator 42 is installed as a cooling means or a condensing means for cooling and condensing the steam 40 generated in the treatment tank 4. As a circulation means for circulating the steam 40 between the radiator 42 and the treatment tank 4. A circulation path 44 is provided, and the circulation path 44 includes an outward pipe 46 and a return pipe 48. That is, the steam 40 generated in the processing tank 4 flows to the radiator 42, is cooled and condensed, and then circulates in the processing tank 4. The radiator 42 includes a plurality of thin tubes 50 through which the steam 40 is divided and flows, and heat radiating fins 52 are attached to the thin tubes 50. The radiator 42 is provided with, for example, a heat radiating fan 54 as a heat radiating means, and the heat radiating fan 54 is driven by a motor 56 which is a driving means. The rotation of the heat dissipating fan 54 causes the cooling air C to flow through the radiator 42 to promote heat dissipation, and the steam 40 passing through the radiator 42 is dissipated and cooled to generate condensed water 58.

  In this embodiment, the radiator 42 is a vertical type in which the heat radiating surface is in the horizontal direction, and the condensed water 58 generated by the cooling of the steam 40 is guided to the steam-water separation unit 60 provided on the bottom surface side. A drain pipe 62 is connected to the air / water separator 60, and an air supply hose 64 for taking in outside air is provided in the middle of the drain pipe 62.

  A temperature sensor 66 is installed as a third temperature detecting means for detecting the inlet side temperature on the inlet side of the radiator 42 to which the outgoing pipe 46 is connected, and a fourth temperature for detecting the outlet side temperature is provided. As a detection means, a temperature sensor 68 is provided on the side of the steam / water separator 60. A circulation fan 70 is attached to the return pipe 48 as a means for forcibly circulating the steam 40, and the circulation fan 70 is driven by a motor 72 as a drive means. An exhaust pipe 74 is branched from the return pipe 48 on the downstream side of the circulation fan 70 as exhaust means for guiding a part of the gas 41 to the outside air together with the pressure applied to the gas 41 condensed by the circulation fan 70. In this case, the condensed gas 41 guided to the circulation fan 70 side is separated through the return pipe 48 into a gas 41A flowing to the processing tank 4 side and a gas 41B flowing to the exhaust pipe 74 side. The exhaust pipe 74 is provided with a deodorizer 76 that decomposes odors using a catalyst or the like, and the deodorizer 76 is provided with a heater 78 as means for heating the catalyst in order to activate the deodorization reaction.

  A blocking plate 90 is provided in the return pipe 48 so that the gas 41 stably flows into the exhaust pipe 74 and can be deodorized by the deodorizer 76. This blocking plate 90 increases the internal pressure in the return pipe 48. An air supply hose 64 for taking in outside air is provided in the middle of the drain pipe 62 to average the pressure of the condensed gas 41 guided to the circulation fan 70 side. By adopting such a structure, it is possible to perform efficient deodorization while reducing the size of the deodorizer 76.

  Next, the control device 86 will be described with reference to FIG. FIG. 2 shows an outline of the control device of the garbage disposal apparatus.

A control device 86 is provided as a control means for performing rotation control of the agitating motor 16, driving of the heater 32, and temperature control based on the operation command from the operation input device 94 and control information of the temperature sensors 34, 36, 66, 68 and the like. . The control device 86 is provided with, for example, a central processing unit (CPU) 96, an EEPROM 97, a RAM 98, and a timer 99. Further, the control device 86 inputs an operation command or the like for instructing operation from the operation input device 94, or the temperature sensors 34 and 36. , 66, 68 etc. are provided with an input unit 90, a heater 32, a stirring motor 16, a circulation fan motor 72, a radiating fan motor 56, a deodorizing heater 78 and the like. It has been. The EEPROM 97 includes a program for performing control and various specified values, for example, a plurality of heating temperatures based on the heat generation temperature of the heater 32, for example, 300 ° C. for the heater temperature Th ₁ , 280 ° C. for the heater temperature Th ₂ , heater 260 ° C. is stored for the temperature Th _{3 and} 240 ° C. for the heater temperature Th ₄ , and the contents can be freely set by connecting and operating an external setting device (PC: Personal Computer) 100 or the like as necessary. Settings can be changed. In this case, the heater temperature Th ₁ is set as the maximum heating temperature, the heater temperature Th ₄ is set as the minimum heating temperature, and the heater temperatures Th ₂ and Th ₃ are set stepwise within the temperature range. The heater temperatures Th ₁ , Th ₂ , Th ₃ and Th ₄ indicate the amount of heating applied to the treatment tank 4.

Here, in the heat drying of the garbage 3, it is necessary to carry out with a heating amount that is not burnt in order to dry while preventing the burning, and when the treatment is performed from the beginning to the end with the heating amount. Since it takes a long time, the first heating stage is heated at the heater temperature Th ₁ which is the maximum heating temperature, the heating amount is gradually lowered as the processing proceeds, and the heating quantity is such that it does not burn in the final stage. To the heater temperature Th ₄ which is the minimum heating temperature. That is, if the same heating amount is applied further, it is necessary to switch the heating temperature before the burning occurs, and the burning 3 is prevented from burning by the switching of the heating temperature.

  Next, the drying process of the garbage 3 is demonstrated with reference to FIG. FIG. 3 is a graph showing changes in heater temperature, tank wall temperature, and radiator inlet / outlet temperature.

In the heating step at a heater temperature Th ₁ is the first heating step, after the vessel wall temperature rose, moisture evaporation is activated, in this case, from the relationship of heating amount <evaporation heat, vessel wall temperature decreases slightly . That is, after rising, stores the maximum temperature at which starts to fall to the RAM 98, thereafter, the predetermined time T ₁ for example, 30 minutes garbage disposal amount of 1 times in the process of 20 kg, one of the garbage throughput In the process of 50 kg or 80 kg, if the stored value is not exceeded for 55 minutes, that value is set as the peak value Tnd. The temperature once lowered starts to rise as drying of the garbage 3 proceeds, but the difference between the lowest temperature and the peak value Tnd falls and is stored as a temperature difference Tdown. When the temperature rises and reaches the peak value Tnd again, the heating heat quantity> the evaporation heat quantity is obtained. In the heating amount in this state, the tank wall temperature continues to rise and causes the garbage 3 to burn, so the heating amount is lowered. Thus, even if the components of the garbage 3, that is, the quality and quantity thereof are different, it is possible to grasp the processing switching points suitable for the garbage 3.

  If such a heating temperature is set to a fixed value, the temperature is not easily reached, so that drying is continued with a large heating amount, which causes burning. Further, when a temperature higher than the fixed value is suitable for the evaporation of moisture, the process is always inefficient and low because of the lack of heat, and the overall processing time is long, resulting in an inefficient process.

  When the peak value Tnd is reached, the heating amount is lowered stepwise. That is, when the heating temperature is lowered step by step, the amount of heating is reduced, so that the tank wall temperature is temporarily lowered. However, since the water in the garbage 3 is reduced by evaporation, the temperature rises again. Since the amount of heating is reduced as the moisture in the garbage 3 is reduced, drying is promoted with high efficiency, and scorching is prevented.

The tank wall temperature is lower than the peak value Tnd by a predetermined temperature ΔT _1, for example, a temperature Tns that is 5 ° C. when a single garbage processing amount is 20 kg, and a temperature Tns that is 4 ° C. when a single garbage processing amount is 50 kg or 80 kg. When it falls below, the heating amount is increased. This occurs when additional garbage is thrown in during the drying process. Control is also performed so that efficient garbage disposal is possible even when additional charging is performed. Even without additional charging, the tank wall temperature may be too low when the heating amount is lowered. This may occur particularly when the amount of processing is large, but since the heating amount is inefficient as it is, the heating amount is increased to cope with such a case.

When the heating stage shifts to the heating stage at the heater temperature Th ₄ which is the final stage, a change in the difference between the temperatures is monitored from the inlet side temperature and the outlet side temperature of the radiator 42 to determine the end of heating. That is, the temperature difference between the inlet side temperature and the outlet side temperature of the radiator 42 is generated by heat exchange of the steam 40 passing through the radiator 42. The inlet side temperature of the radiator 42 is the temperature sensor 66, and the outlet side temperature thereof is the temperature sensor 68. And the temperature difference is obtained. The moisture in the steam becomes condensed water 58 and is discharged. The difference temperature between the inlet side temperature and the outlet side temperature increases as the outside air temperature decreases and the moisture in the steam decreases.

Then, in the heating stage at the heater temperature Th ₄ which is the lowest heating temperature in the final stage, the maximum temperature difference ΔT during drying used when judging completion based on the differential temperature is the value immediately before the final stage, that is, the heater temperature Th ₃ . It is determined by the temperature difference in the heating stage. If the drying process takes a long time, the environmental temperature will affect the drying process. If such a temperature difference is used, the difference in the cooling capacity of the radiator 42 due to the temperature difference between the daytime and the nighttime will be the final. It is prevented from affecting the judgment of the stage. Furthermore, it is because the drying process is progressing in the final stage and there is little dispersion | variation in a moisture content. Moreover, since such a differential temperature is used, the influence of a season, etc. can be absorbed. Then, the completion of the process is determined by a difference temperature of, for example, 2 ° C. spreading from the maximum temperature difference ΔT as a predetermined value α.

  Next, the drying process of the garbage 2 is demonstrated with reference to FIG. FIG. 4 is a flowchart showing the garbage drying process.

When the drying process is started, heating is started at the heater temperature Th ₁ which is the maximum heating temperature (step S1). In the period from step S1 to step S2, as shown in FIG. 3, heat treatment is performed by raising and lowering the heater temperatures Th ₂ , Th _3, etc., and the process proceeds to the final stage. Therefore, it is determined whether or not the heating stage at the heater temperature Th ₃ immediately before the heating stage at the stage of setting the temperature difference judgment criteria of the radiator 42, that is, the heating stage at the heater temperature Th ₄ as the lowest heating temperature as the final stage. A determination is made (step S2). If heating step at a heater temperature Th ₃ is a setting stage differential temperature process proceeds to step S5. The stored maximum temperature difference ΔT is compared with the read temperature difference (step S3). If the stored maximum temperature difference ΔT is larger, the process proceeds to step S5. If the read temperature difference is larger, the stored maximum temperature difference ΔT is updated to the read temperature difference and stored as a new maximum temperature difference ΔT (step S4).

Then, it is determined whether or not the heating process is a heating stage at the heater temperature Th ₄ which is the minimum heating temperature (step S5). If the heating stage is at the heater temperature Th ₄ , the process proceeds to step S10. If it is not the heating stage at the heater temperature Th ₄ that is the minimum heating temperature, whether or not the condition for lowering the heating temperature for the heating stage to be reached, that is, for example, whether or not the tank wall temperature exceeds the peak value Tnd Is determined (step S6). When the heating temperature lowering switching condition is satisfied, the process proceeds to step S12. If the condition for lowering the heating temperature is not satisfied, it is checked whether or not it is necessary to increase the heating temperature, that is, whether the tank wall temperature is too low (step S7). If not necessary, that is, a predetermined temperature ΔT lower than the peak value Tnd, for example, 5 ° C. in the case where the amount of garbage processing amount is 20 kg, and 4 ° C. in the case where the amount of garbage processing amount is 50 kg or 80 kg. If not lower than the temperature Tns, the process returns to step S2. If it is determined that heating temperature increase switching is necessary, it is determined whether or not the current setting is the heater temperature Th ₁ that is the maximum heating temperature (step S8). If the heater temperature Th ₁ is set, because more can not raise the heating temperature, the process proceeds to step S2, the process proceeds to step S9 if the setting of the heater temperature Th _1. In step S9, the heater temperature setting is increased by one stage, the heating amount is increased, and after the heating amount is changed, the process returns to step S2.

  In step S10, the process waits for the temperature difference between the inlet side temperature and the outlet side temperature of the radiator 42 to be larger than the maximum temperature difference ΔT by a predetermined value α (for example, 2 ° C.). When the temperature difference of the radiator 42 becomes larger than the maximum temperature difference ΔT by a predetermined value α, the process proceeds to step S11. In step S11, it is a process at the time of determining completion | finish of a heat processing by the differential temperature of the radiator 42. FIG. As a result, the garbage heat treatment is finished.

By the way, when the condition for lowering the heating temperature is established in step S6, the heater temperature setting is lowered by one step to reduce the heating amount (step S12). This is because if the food is heated at the temperature setting as it is, the garbage 3 is burnt, so that the heating amount is reduced. By lowering the heater temperature setting by one step, the tank wall temperature is once lowered, but then it starts to rise. Further, in this case, it is determined whether or not it is a stage immediately before the heater temperature Th ₄ which is the lowest heating temperature, that is, a heating stage at the heater temperature Th ₃ (step S13), and a stage immediately before the heater temperature Th ₄ (heater If it is not at the temperature Th ₃ ), the process returns to step S2, and if it is immediately before the heater temperature Th ₄ (heater temperature Th ₃ ), 0 ° C. is stored as the initial value of the maximum temperature difference ΔT of the radiator 42 (step S14), the process proceeds to step S2.

  As described above, in this embodiment, in the final stage of the drying process, the end of the drying process is determined based on the temperature difference between the outlet side and the inlet side of the radiator 42. In this case, at the time point one stage before the final stage. Since the maximum temperature difference is stored and the end of drying is determined based on that value + a predetermined value, the completion of the drying process and the end of the heating process can be matched, and the quality and quantity of garbage, as well as the environmental temperature The uniformity of drying can be improved without being affected by the above.

  In the embodiment, a stepwise and discontinuous heating temperature is set between the maximum heating temperature and the minimum heating temperature, and the heating temperature is switched stepwise between the maximum heating temperature and the minimum heating temperature. Although the configuration has been described, the switching of the heating temperature may be changed with a continuous value.

  In the embodiment, in order to determine the end of drying, the reference temperature is a maximum temperature difference between the inlet side temperature and the outlet side temperature of the radiator 42 before the transition to the final stage, or a value obtained by adding a predetermined value to the maximum temperature difference. However, any value that can determine the end of drying may be set as the reference temperature.

As described above, the most preferable embodiment of the present invention has been described. However, the present invention is not limited to the above description, and is described in the claims or disclosed in the specification. It goes without saying that various modifications and changes can be made by those skilled in the art based on the gist, and such modifications and changes are included in the scope of the present invention.

According to the present invention, it is possible to achieve uniform drying of garbage without being affected by the type and amount of garbage or the outside air temperature, etc., and contribute to facilitating its fertilization and disposal. Can and is useful.

It is a figure which shows the garbage processing method and its apparatus which concern on embodiment of this invention. It is a block diagram which shows the control apparatus of a garbage processing apparatus. It is a figure which shows the change of heater temperature, tank wall temperature, and the entrance side temperature / outlet side temperature of a radiator. It is a flowchart which shows the drying process of garbage.

Explanation of symbols

2 Garbage treatment equipment 3 Garbage 4 Treatment tank 32 Heater (heating means)
40 Steam 42 Radiator (condensing means)
44 Circuit (circulation means)
58 Condensed water 66, 68 Temperature sensor 86 Control device (control means)

Claims (3)

A process of heating the garbage by changing the heating temperature within the temperature range with the maximum heating temperature in the initial stage and the minimum heating temperature in the final stage by the heating means in the treatment tank,
A process of separating the condensed water from the steam generated in the processing tank by this heat treatment through the condensing means, and circulating the steam from which the condensed water has been separated to the processing tank;
A process of detecting an inlet side temperature and an outlet side temperature of the steam of the condensing means;
When the difference temperature between the inlet side temperature and the outlet side temperature exceeds a reference temperature when heating at the minimum heating temperature, a process of terminating the heating process;
Garbage disposal method characterized by including.   The reference temperature is a maximum temperature difference between the inlet side temperature and the outlet side temperature detected under the heating temperature of the previous stage before shifting to the minimum heating temperature, or a value obtained by adding a predetermined value to the maximum temperature difference. The garbage disposal method of Claim 1 characterized by the above-mentioned. A treatment tank provided with a heating means, which heat-treats the loaded garbage;
Condensing means for separating condensed water from the steam generated from the garbage in this treatment tank;
A circulating means connected between the condensing means and the treatment tank to circulate the vapor to the condensing means;
Temperature detecting means for detecting an inlet side temperature and an outlet side temperature of the steam of the condensing means;
In the treatment tank, the heating temperature is set to the maximum heating temperature in the initial stage by the heating means and the minimum heating temperature in the final stage, and the heating temperature is varied within the temperature range to heat the garbage, and the minimum heating temperature The reference temperature is set to the difference temperature between the inlet side temperature and the outlet side temperature under the heating temperature before the transition to, and the difference between the inlet side temperature and the outlet side temperature when heating at the minimum heating temperature Control means for terminating the heat treatment when the temperature exceeds the reference temperature;
A garbage disposal apparatus comprising:

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