JP2005172245A - Drier - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enough dry material to be processed. <P>SOLUTION: This drier includes: a processing tank 2 for mixing high-temperature oil 11 with waste 10 and storing the same; a separator 3 for separating the waste 10 from the oil 11; a vapor pressurizer 5 for taking out vapor generated in the processing tank 2 and pressurizing the same; and a heat exchanger 4 for heat-exchanging between the separated oil 11 and the pressurized vapor. The oil 11 heat-exchanged by the heat exchanger 4 is returned to the processing tank 2. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a drying apparatus for dehydrating and drying sewage sludge, livestock waste, food waste, waste having a relatively high water content generated from these secondary treatments, and the like.

  Waste (sewage) such as sewage sludge has a high moisture content, so it is difficult to incinerate the waste as it is, and it is necessary to supply a very large amount of energy such as auxiliary combustion oil from the outside to the incineration process. . For this reason, various apparatuses for drying the waste have been proposed so far in order to reduce the moisture content of the waste. For example, the drying apparatus described in Patent Document 1 takes out water vapor generated when heating and drying waste, pressurizes and raises the temperature, raises the condensation start temperature, and exchanges heat with the waste again. It is possible to continue heating the waste with the heat of condensation.

Japanese Patent Laid-Open No. 10-103861 Japanese Patent Laid-Open No. 11-159959 JP 7-233384 A

  The drying apparatus described in Patent Document 1 is dried in the vicinity of the condenser because a condenser for discharging the pressurized water vapor into the waste and heating the waste is provided in the tank. Waste may stick to the condenser and reduce the heat transfer performance of the condenser. As a result, the waste cannot be heated and the waste cannot be sufficiently dried.

  Then, the objective of this invention is providing the drying apparatus which can dry a to-be-processed object fully.

Means and effects for solving the problems

  The present invention relates to a processing tank that mixes and stores high-temperature oil and an object to be processed, a separation mechanism that takes in and separates the object to be processed and oil, and a steam pressurization that takes out and pressurizes steam generated in the processing tank. A mechanism, a heat exchanger for exchanging heat between the separated oil and the pressurized steam, and the oil exchanged by the heat exchanger is returned to the treatment tank. Features.

  According to this configuration, the oil in the treatment tank can always be kept at a high temperature by separating the oil from the object to be treated containing oil, supplying heat with the heat exchanger, and returning it to the treatment tank again. In contrast to the case where a heating means is provided in the treatment tank and heat exchange is performed directly with the object to be treated, there is no risk of a decrease in heat transfer performance caused by the object to be treated sticking to the heating means, and the object to be treated is eliminated. Can be sufficiently dried. Moreover, since the circulation speed of the oil which circulates between a processing tank and a heat exchanger is quick, thermal efficiency can be improved.

  In this invention, it is preferable that the oil in a processing tank is taken in into a heat exchanger, heat-exchanges with a vapor | steam, is returned again in a processing tank, and the said to-be-processed object is stirred with the returned oil. According to this configuration, stirring in the processing tank is promoted, the concentration of the object to be processed is made more uniform in the processing tank, the temperature in the processing tank is also made uniform, and the temperature in the processing tank is further maintained at an appropriate temperature. Can continue. Moreover, it is preferable that the processing tank of this invention is provided with the guide mechanism which sends a to-be-processed object to a separation mechanism. According to this configuration, the object to be processed can be easily taken into the separation mechanism.

  In another aspect, the present invention relates to a heat supply unit that supplies heat to an object to be processed and oil, an object to be processed and oil that are supplied with heat by the heat supply unit, and steam generated by the heat supply. And a steam pressurizing mechanism for pressurizing the extracted steam. The heat supply unit supplies heat to the object to be processed and oil by the steam pressurized by the steam pressurizing mechanism. It is characterized by that.

  In the heat supply device, the means for supplying heat to the object to be processed and the oil is preferably a jacket through which pressurized steam passes outside the heat supply device, and a method of supplying heat from the outside is preferable. A method of providing a heating means for passing the pressurized vapor may be used. In the method of providing the heat transfer body in the heat supply device, there is a concern that the object to be processed is clogged, but in the present invention, the object to be processed is fluidized with oil, and there is no such concern. Furthermore, an external heat source may be provided in order to keep the workpiece and oil at a more appropriate temperature.

  In the present invention, it is preferable that the oil separated by the separation and take-out mechanism is returned to the heat supply device. According to this, it is not necessary to add new oil, and the cost can be reduced.

  The present invention preferably further includes an agitation tank that agitates the object to be treated and the oil and supplies the agitation to the heat supply device. According to this, the heat conductivity to a to-be-processed object can be improved further by stirring a to-be-processed object and oil. In this case, in order to reduce cost, it is preferable that the oil separated by the separation and take-out mechanism is returned to the stirring tank. Further, in this case, it is preferable to include a preheater that takes in the object to be processed and oil stirred in the stirring tank and supplies heat. According to this, the heat conduction in the heat supply device can be further improved.

  The present invention may include a heater that keeps the temperature of oil in the treatment tank or the heat supply device constant. According to this, the temperature of the oil in the tank can be reliably maintained at an appropriate temperature. In addition, the form of a heater may heat a processing tank from the outside, and may provide the heat exchanger in the inside of a processing tank. Since the object to be treated is fluidized with oil, operation can be performed without clogging even if a heat transfer body is provided inside the treatment tank. Moreover, it is preferable that this invention is further provided with the oil-water separation mechanism which removes the oil contained in the steam heat-exchanged with the said heat exchanger, or the steam heat-supplied with the said heat supply device. According to this, it can be separated into reusable oil and water that is easy to process.

  It is preferable that the treatment tank or the heat supply device of the present invention includes a cutting mechanism for cutting the workpiece. According to this, the cut mechanism can subdivide the object to be processed, and the uneven drying of the object to be processed can be eliminated. Moreover, it is preferable that the separation mechanism of the present invention is provided with a deoiling mechanism that further extracts oil contained in the object to be processed from the object to be processed separated by the separation and extraction mechanism. According to this, a to-be-processed object can be deoiled.

  As a condition for operating the drying apparatus of the present invention, the object to be treated is preferably heated at a temperature of 200 ° C. or lower. By operating in this range, thermal decomposition of the object to be processed can be suppressed, and when the object to be processed is used as, for example, gasified fuel, a high gas conversion rate can be obtained. As the oil to be used, for example, edible oil, edible waste oil, kerosene and the like can be used as appropriate. It is preferable that the treatment tank or the heat supply device has a negative pressure, and the pressurization of the steam is within a compression ratio range in which the power required for the compression does not exceed the amount of heat supplied from the pressurized steam to the workpiece and oil. It can be carried out.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
As shown in FIG. 1, the drying apparatus 1 according to the first embodiment of the present invention includes a treatment tank 2, a separator 3 (separation mechanism), a heat exchanger 4, and a steam pressurizer 5 (steam heating device). Pressure mechanism), an oil / water separator 6 (oil / water separation mechanism), and a deoiler 7 (deoil mechanism).

  The processing tank 2 is covered with a heat insulating material (not shown) outside, and the lower part of a cylinder having an internal space has a funnel shape, and oil 11 is accommodated in the inside thereof. The oil 11 is heated to a high temperature by a heater (not shown) or the like, and is stored so that the liquid level is substantially the same as the separator 3 described later. Further, a waste input port 2a is provided on the side surface of the processing tank 2, so that the waste 10 (object to be processed) can be input into the processing tank 2 from the waste input port 2a. The waste 10 is put into the treatment tank 2 after the water content becomes about 80% or less by a dehydrator (not shown).

  A steam discharge port (not shown) is provided in the upper part of the processing tank 2. When the waste 10 is thrown into the treatment tank 2, the high temperature oil 11 causes the moisture contained in the waste 10 to rise as bubbles 11 a and be discharged to the outside as steam from the steam outlet. It has become. As will be described later, a steam pressurizer 5 is connected to the steam outlet of the treatment tank 2, and the steam discharged from the steam outlet is taken into the steam pressurizer 5 and pressurized. ing.

  A discharge port 2 b is provided at the center of the funnel-shaped portion of the processing tank 2. Unnecessary oil 11 accommodated in the processing tank 2 is discharged from the discharge port 2b. An oil processing tank 7c for processing unnecessary oil is connected to the discharge port 2b, and unnecessary oil 11 is discharged to the oil processing tank 7c and processed.

  Moreover, the processing tank 2 has a rotary blade 15 (guide mechanism) for introducing the waste 10 in the oil 11 into the separator 3 provided on the side surface above the processing tank 2. The rotary blade 15 has a blade having substantially the same shape as the internal space of the processing tank 2, and a rotary shaft 15a is disposed on the central axis. Further, a motor 15b is connected to the rotating shaft 15a. By driving the motor 15b, the rotary blade 15 is rotated.

  The waste 10 thrown into the processing tank 2 floats above the oil 11 when the contained water evaporates. When the waste 10 is above the oil 11, the rotary blade 15 rotates so that the waste 10 is taken into the separator 3. Further, by rotating the rotary blade 15, the waste 10 and the oil 11 can be stirred, and the heat of the oil 11 can be efficiently conducted to the waste 10.

  The separator 3 is disposed on the upper side surface of the treatment tank 2 and separates the waste 10 and the oil 11. Further, the separator 3 includes a separation tank 3a having substantially the same shape as the processing tank 2, and a communication pipe 3c that allows the processing tank 2 and the separation tank 3a to communicate with each other. A separating member 3b is disposed obliquely in a funnel-shaped portion of the separating tank 3a. The separation member 3b is a planar member, and a large number of holes having a size that does not allow the waste 10 to pass through are provided in a knitted shape. The oil 11 taken into the separator 3 together with the waste 10 when the waste 10 is put into the separator 3 from the treatment tank 2 passes through the hole of the separation member 3b, and the funnel-shaped portion of the separation tank 3a. It is supposed to fall into. Thereby, the waste 10 and the oil 11 can be separated. An oil discharge port is provided at the center of the funnel-shaped portion, and the oil 11 accumulated in the funnel-shaped portion is discharged from the oil discharge port.

  The steam pressurizer 5 is connected to a steam outlet provided in the upper part of the processing tank 2, and takes in and pressurizes steam generated in the processing tank 2. By pressurizing the steam with the steam pressurizer 5, the steam condensation start temperature can be raised. Thereby, when it contacts with low temperature oil, a vapor | steam will be a condensation start temperature, and low temperature oil is given the heat of condensation of water vapor | steam in the meantime, and temperature rises.

  The heat exchanger 4 is connected to the oil outlet of the separator 3 and the steam pressurizer 5. The heat exchanger 4 takes in the oil 11 accumulated in the funnel-like portion and heats it with the steam pressurized by the steam pressurizer 5. Exchange. In the heat exchanger 4, the oil 11 and the steam flow through a wall, and exchange heat with each other through the wall. The oil 11 flowing in the heat exchanger 4 is supplied with heat by steam whose condensation start temperature has become high due to pressurization, and is returned to the treatment tank 2 again.

  The oil 11 in the processing tank 2 is taken out by a pump (not shown) or the like from a discharge port (not shown) provided on the side surface of the processing tank 2 and supplied to the heat exchanger 4. In the heat exchanger 4, heat is supplied by pressurized steam and returned to the treatment tank 2 again. Thereby, the oil 11 in the treatment tank 2 can always maintain a high temperature, and the water contained in the waste 10 can be evaporated.

  The oil / water separator 6 is connected to the heat exchanger 4, takes in steam that has been supplied with heat in the heat exchanger 4 as water, and separates the contained oil. The oil-water separator 6 is, for example, a centrifugal separator that uses the difference in specific gravity between oil and water. By rotating the water that has been taken up spirally, When it hits the wall surface, it falls downward along the side wall surface, so that water and oil can be separated.

  The water separated by the oil / water separator 6 is supplied to the water treatment device 6b, and the separated oil is discharged to the oil reservoir 6a. The water taken into the water treatment device 7b is evaporated, and the oil 11 discharged to the oil reservoir 7a is returned to the treatment tank 2 again. Thereby, by separating into water and oil by the oil / water separator 7, the oil can be reused and the water can be easily treated.

  The deoiling device 7 is connected to the separator 3, takes in the waste 10 separated from the oil 11 by the separator 3, and removes the oil contained in the waste 10. The separator 3 is provided with a rotating wheel (not shown). When the rotating wheel is rotated, the waste 10 is fed into the oil removing machine 7 from an intake (not shown). When the waste 10 is filled in the intake portion, the pressure inside the separator 3 is sealed. The deoiling device 7 further removes the oil by pressurization such as applying centrifugal force to the taken-in waste 10. The waste 10 from which the oil 11 has been removed is taken into the waste treatment apparatus 7a and processed. The separated oil 11 is discharged into the oil reservoir 6a and returned to the treatment tank 2 again.

  The heating device 8 (heater) heats the oil 11 in the treatment tank 2 so that the temperature is always constant. Since the oil 11 is supplied with heat by the heat exchanger 4 as described above, the temperature of the oil 11 in the treatment tank 2 is maintained at a high temperature, but is not sufficiently supplied with heat by the heat exchanger 4. It is used for cases.

  Next, operation | movement of the drying apparatus 1 which concerns on this Embodiment mentioned above is demonstrated.

  Oil 11 heated to a high temperature by a heater (not shown) is accommodated in the treatment tank 2. Then, after the moisture content of the waste 10 is reduced to about 80% or less by a dehydrator (not shown), the waste 10 is introduced into the treatment tank 2 from the waste input port 2a. After the waste 10 is put in, the moisture contained in the waste 10 is removed from the waste 10 by the hot oil 11 as water bubbles 11a. In addition, the water bubbles 11 a rise up the oil 11 and are discharged as steam from a steam discharge port provided in the upper part of the treatment tank 2.

  Further, the rotating blade 15 is rotated to mix the oil 11 and the waste 10. The waste 10 precipitates immediately after being charged, but begins to float above the oil 11 as the contained water is removed. When the waste 10 rises to the vicinity of the liquid level of the oil 11, that is, to a level substantially equal to the position where the separator 3 is disposed, the waste 10 passes through the connecting pipe 3c by the rotating rotary blade 15 and the separator 3 It is taken in.

  The waste 10 taken into the separator 3 by the rotary blade 15 is placed on the separation member 3b, and the oil 11 taken together with the waste 10 from the hole of the separation member 3b is put into the funnel of the separator 3. Fall into the shape. The oil 11 that has dropped onto the funnel-shaped portion of the separator 3 is sent to the heat exchanger 4 from the oil discharge port. Moreover, the oil 11 accommodated in the processing tank 2 is sent to the heat exchanger 4 by a pump or the like from the discharge port on the side surface of the processing tank 2.

  On the other hand, the steam discharged from the steam outlet provided in the upper part of the processing tank 2 is taken into the steam pressurizer 5, pressurized, and supplied to the heat exchanger 4. Since the pressurized steam has a higher condensation start temperature, it is supplied to the oil 11 in which the heat of condensation of the pressurized steam is taken in the heat exchanger 4. Then, the heat-supplied oil 11 is returned again into the treatment tank 2. In the heat exchanger 4, the steam that has been supplied with heat is taken into the oil / water separator 7 and separated into water and oil. Water is supplied to the water treatment device 6b and processed. Further, the oil is discharged into the oil reservoir 6a and returned to the treatment tank 2 again. Further, the oil 11 is heated by the heating device 8 so that the temperature of the oil 11 is always constant even when the oil 11 is not sufficiently supplied with heat by the heat exchanger 4.

  The waste 10 from which the oil has been separated by the separator 3 is sent to the deoiling device 7 to further remove the oil contained in the waste 10. The waste 10 from which the oil 11 has been separated is taken into the waste treatment apparatus 7a and processed. Further, the separated oil 11 is discharged to the oil reservoir 6a and returned to the treatment tank 2 again. Moreover, the oil which became unnecessary in the processing tank 2 is discharged | emitted from the discharge port 2b, and is processed by the oil processing tank 7c.

  As described above, in the present embodiment, the oil 11 is separated from the waste 10 containing the oil 11, supplied with heat by the heat exchanger 4, and returned to the treatment tank 2 again, whereby the treatment tank 2 is obtained. The oil 11 inside can always be kept at a high temperature. And in contrast with the case where the heating means is provided in the treatment tank 2 and heat is directly exchanged with the waste without using oil, there is no risk of a decrease in heat transfer performance caused by the waste sticking to the heating means, etc. The waste 10 can be sufficiently dried. Moreover, since the circulation speed of the oil 11 is fast, the thermal efficiency can be improved. Moreover, the temperature in the processing tank 2 can be kept further high by supplying the oil 11 in the processing tank 2 to the heat exchanger 4, heating it, and returning it to the processing tank 2 again.

  Further, by taking the steam whose heat supply has been completed in the heat exchanger 4 into the oil / water separator 6, it is possible to separate the oil into reusable oil and water that can be easily processed. Further, the waste 10 that has been removed by removing moisture can be easily taken into the separator 3 by the rotary blade 15.

  In addition, the shape of the processing tank 2 or the separation tank 3a demonstrated in this Embodiment is not limited to this Embodiment mentioned above. In addition, since the waste 10 floats above the oil 11 as the water evaporates, the separator 3 is disposed above the treatment tank 2, but may have other structures. . For example, when the water content of the waste 10 is removed, the separator 3 may be disposed below the treatment tank 2 in the case where precipitation occurs due to the type or temperature of the oil 11. Further, the heating device 8 may not be provided, and when the oil reservoir 6a is returned into the processing tank 2, heat may be supplied by a heater or the like to return to the processing tank 2.

(Second Embodiment)
Next, a drying apparatus 9 according to a second embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the member similar to 1st Embodiment, and description is abbreviate | omitted.

  The drying device 9 according to the present embodiment includes a steam pressurizer 5, an oil / water separator 6, a deoiler 7, a heat supplier 12, and a separator / extractor 13 (a separator / extract mechanism).

  The heat supplier 12 contains the oil 11 and supplies heat to the waste 10 and the oil 11. The heat supplier 12 is provided with a pipe through which steam flows so as to surround the pipe through which the waste 10 and oil 11 flow. As will be described in detail later, the steam separated by the separator / extractor 13 is pressurized by the steam pressurizer 5 and has a high condensation temperature. The pressurized steam, the waste 10 and the oil 11 exchange heat through the pipe wall.

  The heat supply device 12 is disposed so that the waste 10 and the oil 11 flow in the vertical direction, and the lower portion of the heat supply device 12 is an intake port and the upper portion is an intake port. A supply pump (not shown) is connected to the lower intake of the heat supplier 12 so that the waste 10 is taken into the heat supplier 12 by the supply pump. In addition, a cutting mechanism 19 is provided at the intake port, and the waste 10 is taken into the heat supply device 12 via the cutting mechanism 19, and at this time, the waste 10 is in the form of pellets. It is designed to be cut. By making the waste 10 into a pellet form, the waste 10 can be easily mixed with the oil 11 uniformly, so that the heat can be efficiently conducted. Further, a preheater 22 is connected to the intake port to take in the oil 11 taken out by a separation take-out device 13 described later and the oil 11 discharged to the oil reservoir 6a, supply heat, and heat supply device 12 is discharged. Thereby, thermal efficiency can be improved now.

  In addition, a guide member 12 a is provided at the outlet of the waste 10 and the oil 11 at the top of the heat supplier 12. The guide member 12 a sends the waste 10 and the oil 11 taken into the heat supply device 12 to the separation / take-out device 13. The guide member 12a has a cylinder communicating with the pipe through which the waste 10 and oil 11 of the heat supply device 12 flow, and separates and extracts the waste 10 and oil 11 discharged into the guide member 12a through the cylinder. The vessel 13 has an inclination for sliding down.

  The separator / extractor 13 is connected to the guide member 12a of the heat supplier 12, and separates the waste material 10 supplied with heat, the oil 11 and the steam generated by the heat supply. Further, the separation / extraction device 13 has a separation tank 13a, and a connecting pipe 13c that allows the heat supply device 12 and the separation tank 13a to communicate with each other. A separating member 13b is provided in a funnel-shaped portion of the separation tank 13a. It is arranged. At the upper part of the separation tank 13a, a steam outlet for discharging steam generated by heat supply is provided. In addition, about the other part of the separation tank 13a, the separation member 13b, and the connection pipe 13c, since it is the same as that of the separator 3 of the form of 1st Embodiment, detailed description is abbreviate | omitted.

  The steam pressurizer 5 is connected to the steam outlet of the separation tank 13a, and takes in and pressurizes the steam discharged from the steam outlet. As described above, the heat supply device 12 is connected to the steam pressurizer 5, and the pressurized steam is discharged to the heat supply device 12, and heat exchange is performed between the waste material 10 and the oil 11 in the heat supply device 12. It is supposed to be.

  The oil / water separator 6 is connected to a heat supplier 12, and the deoiler 7 is connected to a separator / extractor 13. Since the oil-water separator 6 and the deoiler 7 are the same as those in the first embodiment, description thereof is omitted.

  Next, operation | movement of the drying apparatus 9 which concerns on this Embodiment mentioned above is demonstrated.

  The waste 10 is taken into the heat supplier 12 by a supply pump (not shown). At this time, the waste 10 is pelletized by the cutting mechanism 19 and taken into the heat supplier 12. When the waste 10 is supplied with heat in the heat supply device 12, the contained moisture is removed, and the oil 11 increases and rises accordingly.

  When the waste 10 and the oil 11 reach the guide member 12a provided on the upper part of the heat supply device 12, they are thrown into the separator / collector 13 along the inclination of the guide member 12a. Then, the waste 10 and the oil 11 are separated into the oil 11, the waste 10, and the steam in the separator / extractor 13. The waste 10 is taken into the deoiling device 7 and the contained oil is removed. Thereafter, the waste 10 is discharged to the waste treatment apparatus 7a and processed. The removed oil 11 is discharged to the oil reservoir 6a.

  Further, the oil 11 separated by the separator / extractor 13 is discharged to the preheater 22, supplies heat to the waste 10 and the oil 11 in the preheater 22, and is taken into the heat supplier 12. On the other hand, the steam separated by the separator / extractor 13 is taken into the steam pressurizer 5 and, when pressurized, is discharged to the heat supplier 12. Then, the heat supply device 12 supplies heat to the waste 10 and the oil 11. The steam for which heat supply has been completed is discharged to the oil / water separator 6 and separated into oil and water. It is discharged to the oil reservoir 6a and the water treatment device 6b. The oil 11 discharged to the oil sump 6a is taken into the preheater 22 and supplied with heat as described above, and then discharged to the heat supplier 12.

  As described above, in the present embodiment, in order to supply heat to the waste 10 and the oil 11, the heating means is compared with the case where the heating means is provided in the treatment tank and the heat exchange is performed directly with the object to be treated. Thus, there is no risk of a decrease in heat transfer performance caused by the object to be treated sticking to the substrate, and the waste 10 can be sufficiently dried. Moreover, since the heat supply device 12 supplies heat to the waste 10 and the oil 11 by the steam that has been taken out and pressurized, it is not necessary to provide other heating means. Furthermore, by providing the cutting mechanism 19 at the intake port of the waste 10 of the heat supply device 12, the waste 10 can be made to have a uniform size. Thereby, the waste 10 can be made uniform, and at the same time, the waste 10 and the oil can be sufficiently mixed. In addition, the same effects as those of the first embodiment can be obtained.

(Third embodiment)
Next, a drying apparatus 30 according to a third embodiment of the present invention will be described with reference to FIG. The drying apparatus 30 according to the present embodiment is different from the second embodiment in that the waste 10 and the oil 11 stirred in the stirring tank are supplied with heat by the heat supplier 12. Hereinafter, the difference will be described. In addition, the same code | symbol is attached | subjected to the member similar to 1st and 2nd embodiment, and description is abbreviate | omitted.

  The agitation tank 20 is a tank for agitating the waste and the oil 11, and a waste input port 2a for supplying the waste is provided at the upper part. Moreover, the stirring tank 20 is provided with the rotary blade 16 (stirring mechanism). The rotary blade 16 has three blades, and a rotary shaft 16a is disposed on the central axis. Further, a motor 16b is connected to the rotating shaft 16a, and the rotating blade 16 is rotated by driving the motor 16b. Waste and oil 11 are mixed by rotating the rotating blade 16. As a result, a sludge-like (mud-like) mixture of waste and oil 11 is generated. In the following description, a mixture of waste and oil 11 is referred to as a mixture 18.

  A discharge port 2 b for discharging the mixture 18 is provided in the lower part of the stirring tank 20. The preheater 14 is connected to the discharge port 2 b and takes in the mixture 18 accommodated in the stirring tank 20. The preheater 14 is also connected to a separator / extractor 13 to be described later, and takes in the oil 11 separated by the separator / extractor 13. Inside the preheater 14, the pipe through which the oil 11 separated by the separator / extractor 13 flows is disposed so as to surround the pipe through which the mixture 18 flows, and the oil 11 supplies heat to the mixture 18. It is like that. The oil 11 separated by the separator / extractor 13 is at a high temperature because it is supplied with heat by the heat supplier 12.

  The heat supplier 12 is connected to the preheater 14 and supplies heat to the taken mixture 18. In the present embodiment different from the second embodiment, the heat supplier 12 is arranged so that the mixture 18 flows horizontally, and the oil 11 is not accommodated. The separation extractor 13 is connected to the heat supply device 12 and separates the heat-supplied mixture 18 and the steam generated by the heat supply. The steam pressurizer 5 is connected to the steam outlet of the separation tank 13a, and takes in and pressurizes the steam discharged from the steam outlet. As described above, the heat supply device 12 is connected to the steam pressurizer 5, and the pressurized steam is discharged to the heat supply device 12, and heat exchange with the mixture 18 is performed in the heat supply device 12. ing. The oil / water separator 6 is connected to a heat supplier 12, and the deoiler 7 is connected to a separator / extractor 13. Since the oil-water separator 6 and the deoiler 7 are the same as those in the first embodiment, description thereof is omitted.

  Next, the operation of the drying apparatus 30 according to this embodiment described above will be described.

  Waste is introduced into the stirring tank 20 through the waste inlet 2a. And if a waste material is thrown in, the rotary blade 16 will be rotated and the oil 11 and waste material will be stirred. By mixing the waste and the oil 11, a sludge-like mixture 18 is generated. Then, the mixture 18 is discharged from the discharge port 2b, taken into the preheater 14, and preliminarily supplied with heat. The preheater 14 preliminarily supplies heat to the waste 10 and the oil 11 discharged from the agitation tank 20 by taking in the oil 11 which is supplied with heat by the heat supplier 12 and separated by the separator / extractor 13. To do. In addition, you may make it supply heat with another heating means, without supplying heat with the oil 11 isolate | separated with the separation extractor 13. FIG.

  The mixture 18 preliminarily supplied with heat by the preheater 14 is taken into the heat supplier 12 and further supplied with heat. In the heat supplier 12, the steam taken out by the separator / taker 13 is supplied to the steam pressurizer 5 and pressurized to supply heat by the steam having a high condensation temperature. Thereafter, it is taken into the separator / collector 13, and the mixture 18 is separated into waste and oil 11. Further, the steam generated by the heat supply by the heat supplier 12 is taken out. The taken-out steam is pressurized by the steam pressurizer 5 and further supplied to the heat supplier 12. The supplied steam supplies heat to the mixture 18 in the heat supplier 12 and is then taken into the oil / water separator 6. The steam is separated into water and oil by the oil / water separator 6 and discharged to the oil reservoir 6a and the water treatment device 6b. Then, the oil 11 discharged to the oil reservoir 6a is returned again into the stirring tank 20.

  On the other hand, the waste from which the oil has been separated by the separator / extractor 13 is taken into the deoiling device 7 to further remove the oil contained in the waste. The waste from which the oil 11 has been separated is taken into the waste treatment device 7a and processed, and the separated oil 11 is discharged into the oil reservoir 6a and returned to the stirring tank 20 again.

  As described above, in this embodiment, the same effect as that of the second embodiment can be obtained. Further, by supplying heat to the mixture 18 of the waste and the oil 11, the contained water ratio can be kept constant, and a uniformly dried waste can be obtained. Moreover, the heat efficiency in the heat supplier 12 can be improved by heating the mixture 18 with the preheater 14 before the heat supplier 12.

  In the above-described embodiment, before the heat supply by the heat supplier 12, the preheater 14 preliminarily supplies heat to the waste 10 and the oil 11. However, even if the preheater 14 is not provided. Good. In this case, the oil 11 separated by the separator / extractor 13 may be directly returned to the stirring tank 20. Moreover, although the preheater 14 supplies heat with the oil 11 taken out by the separator / extractor 13, heat may be supplied using another heating means.

  In addition, although this invention is described in said preferable embodiment, this invention is not restrict | limited only to it. It will be understood that various other embodiments may be made without departing from the spirit and scope of the invention. Furthermore, in this embodiment, although the effect | action and effect by the structure of this invention are described, these effect | actions and effects are examples and do not limit this invention.

1 is an overall schematic view of a drying apparatus according to a first embodiment of the present invention. The whole schematic diagram of the drying device concerning a 2nd embodiment of the present invention. The whole schematic diagram of the drying device concerning a 3rd embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drying apparatus 2 Processing tank 2a Waste inlet 3 Separator 4 Heat exchanger 5 Steam pressurizer 6 Oil-water separator 7 Deoiler 10 Waste 11 Oil

Claims (12)

A treatment tank for mixing and storing high-temperature oil and an object to be treated;
A separation mechanism for separating the object to be treated and the oil;
A steam pressurizing mechanism for taking out and pressurizing the steam generated in the treatment tank;
A heat exchanger for exchanging heat between the separated oil and the pressurized steam;
The oil exchanged by the heat exchanger is returned to the treatment tank.   Oil in the treatment tank is taken into the heat exchanger, exchanges heat with the steam, is returned to the treatment tank again, and the object to be treated is stirred by the returned oil. The drying apparatus according to claim 1. The treatment tank is
The drying apparatus according to claim 1, further comprising a guide mechanism that feeds the workpiece to the separation mechanism. A heat supply for supplying heat to the workpiece and oil;
A separation / extraction mechanism for separating the object to be treated and the oil which are supplied with heat by the heat supply unit, and for extracting steam generated by the heat supply;
A steam pressurizing mechanism that pressurizes the steam taken out,
The heat supplier is
A drying apparatus, wherein heat is supplied to the object to be processed and the oil by steam pressurized by the steam pressurizing mechanism.   The drying apparatus according to claim 4, wherein the oil separated by the separation / extraction mechanism is returned to the heat supply unit.   The drying apparatus according to claim 4, further comprising a stirring tank that stirs the object to be processed and the oil and supplies the stirring to the heat supply unit.   The drying apparatus according to claim 6, wherein the oil separated by the separation and take-out mechanism is returned to the stirring tank.   The drying apparatus according to claim 6 or 7, further comprising a preheater that takes in the object to be treated and the oil stirred in the stirring tank and supplies heat.   The drying apparatus according to any one of claims 1 to 8, further comprising a heater that keeps the temperature of the oil in the treatment tank or the heat supply unit constant.   The oil-water separation mechanism for removing the oil contained in the steam heat-exchanged by the heat exchanger or the steam heat-supplied by the heat supplier is further provided. The drying apparatus according to claim 1. The treatment tank or the heat supplier is
The drying apparatus according to claim 1, further comprising a cutting mechanism for cutting the object to be processed. The said separation mechanism is equipped with the deoiling mechanism which further takes out the oil contained in the said to-be-processed object from the said to-be-processed object isolate | separated by the separation / extraction mechanism. The drying apparatus as described.

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