JP2009101325A - Vacuum dryer of garbage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vacuum dryer of garbage which vacuum-dries the garbage in a rotary drum and can make up for the decrease of a stirring power and increase a heat transfer rate with the help of a heater fitted to a stirring blade. <P>SOLUTION: This vacuum dryer of garbage comprises (1) the rotary drum 1 which has a garbage dumping/discharge port 2 arranged on one side and also, is rotatably supported by a rotary joint 3 connected with a vacuum pump P in the center of the other side, (2) the stirring blade 5, with a heater 4, fitted to the inner wall of the rotary drum 1, and (3) a vacuum suction means 7 which is arranged rotatably adjacent to the rotary joint 3 and has a suction port 6 always orientated to the inner top of the rotary drum 1 by an upward compulsive force. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vacuum drying apparatus for garbage, which is vacuum-dried while throwing garbage into a rotating drum and stirring, and by attaching a heater as a heating source to a stirring blade attached to the inner wall of the rotating drum. The aim is to reduce heating energy by lowering the stirring power and increasing the thermal conductivity.

  Conventionally, in order to dry garbage, an atmospheric drying apparatus and a vacuum drying apparatus are known. Of these, the atmospheric drying apparatus performs drying by blowing hot air to the garbage under atmospheric pressure. In addition, the vacuum drying device is for evaporating and drying garbage in a low temperature under vacuum.

  In the case of reusing raw garbage as feed, drying the raw food at a high temperature changes the properties and is not preferable. Therefore, drying under reduced pressure such as vacuum drying is expected.

  A garbage processing apparatus for drying and processing garbage by normal pressure includes a rotating drum in which a plurality of stirring blades are fixed on an inner surface and the rotating shaft is held substantially horizontal, and one side surface of the rotating drum A charging pipe having a charging opening that faces the rotary drum from the opening provided at the other end and opens the other end of the rotary drum upward, an air supply system that supplies air from the charging pipe into the rotary drum, There has been a garbage disposal apparatus provided with an exhaust system connected to the other side surface and a heater for raising the ambient temperature in the case in which the rotating drum is housed (see, for example, Patent Document 1).

In addition, as a vacuum drying and extinguishing device for garbage under reduced pressure such as vacuum, the garbage is evaporated in a drying chamber using microwaves as a heat source, and moisture is evaporated at a low temperature under reduced pressure. There was a vacuum drying and canceling apparatus (for example, refer to Patent Document 2).
JP-A-8-117728 JP-A-7-233931

  However, when vacuum drying is applied to the above-described conventional garbage disposal apparatus described in Patent Document 1 including a rotating drum having a stirring blade attached inside, it can be applied as it is to perform vacuum drying. First, in order to increase the drying efficiency for garbage, the garbage must be agitated by a stirring blade incorporated in a vacuum drying chamber to efficiently perform heat transfer.

  However, when vacuum drying is performed, heat transfer (conduction, convection, radiation) is restricted under vacuum, and only heat conduction can be expected. For this reason, in order to perform heat transfer to garbage effectively, it is necessary to stir garbage efficiently.

  However, when the garbage thrown into the rotating drum is agitated by the stirring blades, the garbage gets stuck in the stirring blades and becomes entangled, resulting in inoperability, and the moisture content decreases during the drying process of the garbage. Then, since the sliding resistance of the stirring blade increases, there arises a problem that the stirring power must be increased.

  In addition, since the heating method is an indirect heating method in which the atmospheric temperature in the case in which the rotating drum is accommodated is raised by a heater, sufficient heat is not transmitted to the garbage, resulting in poor thermal efficiency. Therefore, in order to heat garbage, much heating energy was required.

  The present invention has been made to solve the above-described conventional drawbacks, and an object of the present invention is to provide a vacuum drying apparatus for garbage that reduces the stirring power and heating energy for the garbage.

The present invention has been made in view of the above problems, and the invention according to claim 1
A rotary drum provided with a garbage input / discharge port on one side and supported rotatably by a rotary joint connected to a vacuum pump at the center on the other side;
A stirring blade attached to the inner wall of the rotating drum and equipped with a heater as a heating source;
A vacuum suction means which is provided so as to be rotatable adjacent to the rotary joint, and has a suction port which is always directed to the upper part in the rotary drum under an upward forcing force;
It is provided with.

  According to a second aspect of the present invention, in the first aspect, the vacuum suction means is symmetrical to the weight on a bearing, a weight fixed to the outer peripheral lower surface of the bearing, and an outer peripheral upper surface of the bearing. The suction port is formed by the gravity port and oriented to the upper part of the rotary drum by the gravity of the weight.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the rotary drum is provided with an exhaust outlet plate at an interval so as to cover substantially the upper half of the circumferential direction. The blowing plate is connected to the exhaust port of the vacuum pump.

  The invention according to claim 4 of the present invention is the rotating drum according to any one of claims 1 to 3, wherein the rotary drum has a ring-shaped sealing member only on one side where the garbage input / discharge port is provided. And the remaining other portion is rotatably accommodated in the sealed box, and the end surface of the sealing member is in contact with the side surface of the sealed box in a sealable manner. It is characterized by that.

  Further, in the invention according to claim 5 of the present invention, in claim 1-4, the rotating drum is rotatably supported on a plurality of rollers provided on a gantry arranged on the load cell. The load cell measures the mass of the rotating drum before the garbage is thrown in and the mass after the garbage is thrown in, and calculates the difference between the mass before throwing in the garbage and the mass after throwing in the garbage. The actual amount of waste input is calculated, and the vacuum drying operation in the rotary drum is controlled by the control means until the specified mass reduction rate is reached.

  In addition, the invention according to claim 6 of the present invention is that, in claim 1-5, the heater is formed in a U-shaped electric heater, and the electric heater is placed on the front and back sides so as to straddle the stirring blade. Suppose that it was installed.

  According to the first aspect of the present invention, the rotary drum is provided with a garbage input / discharge port on one side and is rotatably supported by a rotary joint connected to a vacuum pump at the other side center. And a stirring blade attached to the inner wall of the rotating drum and provided with a heater as a heating source, and rotatably provided adjacent to the rotary joint, and constantly receiving an upward forcing force in the rotating drum. Vacuum suction means having a suction port oriented at the top of the rotary drum, so that the rotating drum is rotated and the garbage is uniformly turned back by a stirring blade, and the inside of the rotating drum is sucked by a vacuum pump Since the heater is attached as a heating source to the stirring blades that are decompressed to a vacuum atmosphere and are installed in the rotating drum, garbage is prevented from getting caught or entangled in the stirring blades. It is no longer able to cause a. In addition, since the inside of the rotating drum is decompressed to a vacuum atmosphere by suction with a vacuum pump, and a heater is attached to the stirring blades installed in the rotating drum, the heat transfer to the garbage is improved and direct In addition, since the garbage is heated, the heat efficiency is improved, and a large amount of heating energy is not required to heat the garbage.

  Moreover, even if the moisture content is reduced during the drying process of garbage, the stirring power can be reduced without increasing the sliding resistance of the stirring blade.

  Further, the center of the other side of the rotating drum is rotatably supported by a rotary joint connected to a vacuum pump. Since the suction port is oriented, the suction port of the suction means is always oriented upward without being twisted even if the rotating drum rotates.

  According to the second aspect of the present invention, the vacuum suction means is provided symmetrically to the weight on a bearing, a weight fixed to the outer peripheral lower surface of the bearing, and an outer peripheral upper surface of the bearing. And the suction port oriented in the upper part of the rotary drum due to the gravity of the weight, so that the suction port of the vacuum suction means remains on the outer peripheral upper surface of the bearing even when the rotary drum is rotated. In addition, it is always forcedly oriented at the upper part in the rotary drum by the gravity of a weight provided symmetrically with the suction port. Accordingly, it is possible to avoid suction of foreign matters accumulated under the rotating drum.

  According to the invention described in claim 3 of the present invention, the rotary drum is provided with an exhaust outlet plate at an interval so as to cover substantially the upper half of the circumferential direction, and the exhaust outlet plate is provided with the vacuum Since it is connected to the exhaust port of the pump, the waste from the vacuum pump is blown to the outer periphery of the rotating drum to indirectly heat the garbage, effectively using the input energy, and preventing waste of energy.

  According to a fourth aspect of the present invention, the rotary drum is a sealed box that is rotatable only on one side provided with the garbage input / discharge port via a ring-shaped seal member. And the remaining other part is rotatably accommodated in the sealed box, and the end surface of the seal member is in contact with the side surface of the sealed box so as to be sealable. In addition to heating the garbage directly with a heater attached to the stirring plate, the energy saving effect can be expected by using hot air for indirect heating of the garbage.

  According to the invention described in claim 5 of the present invention, the rotating drum is rotatably supported on a plurality of rollers provided on a gantry disposed on the load cell, and the load cell The mass of the rotating drum before the garbage is thrown in and the mass after the garbage is thrown in are measured, and the difference between the mass before the garbage is thrown in and the mass after the garbage is thrown in is calculated to calculate the actual thrown amount of the garbage. Since the vacuum drying operation in the rotating drum is controlled by the control means until the specified mass reduction rate is reached, the finished drying state of the garbage can be automatically and automatically controlled at the specified mass reduction rate. it can.

  According to the invention described in claim 6 of the present invention, the heater is formed in a U-shaped electric heater, and the electric heater is attached to the front and back sides so as to straddle the stirring blade. The garbage can be efficiently heated by the front and back sides of the agitating blade, and the through-hole of the side surface of the rotating drum of the heater lead wire is only required to be manufactured and assembled.

  The details of the present invention will be described below according to the best mode for carrying out the present invention with reference to the drawings.

  1 is a longitudinal sectional view showing an embodiment of a vacuum drying apparatus for garbage according to the present invention, FIG. 2 is a sectional view taken along the line A-A in FIG. 1, and FIG. 3 is a vacuum suction constituting the present embodiment. It is sectional drawing which shows a means.

  The embodiment of the present invention comprises a rotary drum 1 provided with a garbage input / discharge port 2 on one side and rotatably supported by a rotary joint 3 whose center on the other side is connected to a vacuum pump P, An agitating blade 5 attached to the inner wall of the rotating drum 1 and mounted with a heater 4 as a heating source, and is provided so as to be rotatable adjacent to the rotary joint 3 and always receives the upward forcing force to receive the rotating drum. 1 and a vacuum suction means 7 having a suction port 6 oriented in the upper part of 1.

  The rotary drum 1 is for vacuum drying when the garbage N is introduced. The exhaust blow plate 8 has an arcuate cross section with a space t so as to cover substantially the upper half of the circumferential direction. The exhaust outlet plate 8 is connected to the exhaust port 9 of the vacuum pump P. This vacuum pump P is a dry pump.

  Only one side 1A provided with the garbage input / discharge port 2 of the rotating drum 1 is exposed from a sealed box 11 to be rotatable through a ring-shaped seal member 10, and the remaining part 1B is remaining. Is rotatably accommodated in the sealed box 11, and the end surface 10a of the seal member 10 is in contact with the side surface of the sealed box 11 so as to be sealable.

  The rotating drum 1 is rotatably supported on a plurality of rollers 14 mounted on a gantry 13 disposed on a load cell 12, and the load cell 12 allows the mass of the rotating drum 1 before throwing in garbage to be , The mass after the raw garbage is measured, the difference between the mass before the raw garbage is input and the mass after the raw garbage is calculated to calculate the actual input amount of garbage N, and the specified mass reduction rate Until this time, the vacuum drying operation in the rotary drum 1 is controlled by the control means CPU.

  In this embodiment, a turning roller is used as the roller 14, and this turning roller is rotationally driven by a geared motor with a brake (not shown) as a drive source, and a limit switch (not shown) is turned on / off. Thus, the rotary drum 1 is rotatably supported so as to repeat forward and reverse rotation every round.

  The heater 4 is formed into a U-shaped electric heater, and the electric heater is attached to the front and back side surfaces so as to straddle the stirring blade 5. In FIG. 1 and FIG. 2, two electric heaters are installed in two stages on one stirring blade 5, but the increase / decrease can be freely changed. In addition, a temperature switch (not shown) is provided on the stirring blade 5 in the vicinity of the electric heater. In addition, although one stirring blade 5 is illustrated in the drawing, the number, the installation direction, and the shape of the agitation blade 5 are not limited to those illustrated, and can be freely set.

  Thus, the heater 4 is formed in a U-shaped electric heater, and the electric heater is attached in close contact with the left and right side surfaces so as to straddle the stirring blade 5. The garbage N can be efficiently heated, and the lead wire of the heater 4 has only one through portion on the side surface of the rotary drum 1 so that the production and assembly can be easily performed.

  The vacuum suction means 7 includes a bearing 15, a weight 16 fixed to the outer peripheral lower surface of the bearing 15, and provided on the outer peripheral upper surface of the bearing 15 symmetrically with the weight 16. It is formed by the suction port 6 oriented at the upper part in the rotary drum 1. Needless to say, the weight 16 is larger in mass than the suction port 6.

  As described above, the suction port 6 of the vacuum suction means 7 is provided symmetrically with the weight 16 provided on the outer peripheral lower surface on the outer peripheral upper surface of the bearing 15 so as to be always forcedly oriented at the upper portion in the rotary drum 1. This is because, even when the rotating drum 1 is rotated, the suction port 6 of the vacuum suction means 7 is always forcedly oriented to the upper part of the rotating drum 1 by the gravity G of the weight 16 regardless of the rotation position. This is to avoid suction of foreign matter accumulated below the rotary drum 1 and to prevent the suction of dried garbage N fragments.

  In FIGS. 1 and 3, reference numeral 17 denotes a screen provided in the rotary drum 1 on the inside and in the vicinity of the vacuum suction means 7, and the screen 17 has a waste N fragment on the vacuum suction means 7 side. This is to prevent passing and depositing on the inner lower part of the rotating drum 1. Reference numeral 18 denotes a lid plate that closes the garbage input / discharge port 2 so as to be openable and closable.

  The embodiment of the present invention is configured as described above, and the garbage N to be treated is input from the garbage input / discharge port 2 provided on one side of the rotary drum 1 in use.

  Next, when a power switch (not shown) is turned on, a geared motor with a brake (not shown) is driven as a drive source, and a plurality of rollers 14 mounted on the gantry 13 disposed on the load cell 12, that is, In this embodiment, since the turning roller is rotated, the rotating drum 1 supported by the turning roller can be rotated so as to repeat forward and reverse every round by turning on / off a limit switch (not shown). Supported by

  Since the sealed rotary drum 1 and the dry vacuum pump P are connected, the inside of the rotary drum 1 is depressurized and kept in a vacuum. At the same time, the U-shaped electric heater, that is, the heater 4 attached in close contact with the front and back side surfaces of the stirring blade 5 attached to the inner wall of the rotating drum 1 is energized to generate heat. Therefore, the garbage N put into the rotating drum 1 is heated under vacuum and dried.

  At this time, as described above, the rotating drum 1 is rotatably supported by the turning roller so as to repeat the forward and reverse rotations every rotation, so that the garbage N is attached to the inner wall of the rotating drum 1. The agitating blade 5 is efficiently and uniformly switched by the agitating blade 5 so that the agitation is sufficiently performed, and the heat transfer is quickly and surely performed. It is directly heated by the heating from the U-shaped electric heater, that is, the heater 4, and the heat transfer is performed efficiently. Therefore, less heating energy is required to heat the garbage N, and the energy saving effect is great.

  At this time, as described above, the rotating drum 1 can be rotated so as to repeat forward and reverse rotations every round by a plurality of rollers 14 mounted on a mount 13 disposed on the load cell 12, that is, a turning roller. Since it is supported, agitation is performed quickly and smoothly without the garbage N being bitten or entangled in the agitation blade 5, and there is no possibility that the operation cannot be disabled. The rotation amount, rotation direction, and the like of the rotary drum 1 are not limited to those described above, and can be set freely.

  In addition, since the garbage N is heated in the rotary drum 1 under a reduced pressure of vacuum, the moisture contained in the garbage N quickly evaporates without raising the heating temperature by the heater 4 too high. Unlike the conventional garbage disposal apparatus described in Patent Document 1 in which a plurality of stirring blades are fixed to the inner surface of the rotating drum and are heated and dried under atmospheric pressure, Even if the moisture content is reduced during the drying process and the sliding resistance of the stirring blade 5 is increased, the drying can be performed without increasing the stirring power. Therefore, when the raw garbage is reused as feed, it is not necessary to dry the raw food at a high temperature.

  Further, the center of the other side of the rotary drum 1 is rotatably supported by a rotary joint 3 connected to the vacuum pump P, and an upward forcing force, that is, an outer peripheral upper surface of the bearing 15 is always adjacent to the rotary joint 3. Since the suction port 6 of the vacuum suction means 7 is provided symmetrically with the weight 16 provided on the lower surface of the outer periphery, the rotating drum 1 is always forced to be oriented in the upper part of the rotary drum 1. The suction port 6 of the vacuum suction means 7 connected to the vacuum pump P is always twisted upward and deposited below the rotary drum 1 even if the roller is rotated so as to repeat forward and reverse rotations every round. The suction of the foreign matter that has been made can be avoided, and the debris of the dry garbage N is not sucked.

  Further, as shown in FIGS. 1 and 2, the rotary drum 1 is provided with an exhaust outlet plate 8 having an arcuate cross section at an interval t so as to cover substantially the upper half in the circumferential direction. Is connected to the exhaust port 9 of the vacuum pump P, so that the waste N is indirectly heated by blowing the exhaust from the vacuum pump P to the outer periphery of the rotary drum 1 to effectively use the input energy. , Can prevent energy waste.

  Further, only one side 1A provided with the garbage input / discharge port 2 of the rotating drum 1 is exposed from the sealed box 11 so as to be rotatable through a ring-shaped seal member 10, and the other remaining ones are provided. The portion 1B is rotatably accommodated in the sealed box 11, and the end surface 10a of the sealing member 10 is in contact with the side surface of the sealed box 11 so as to be able to be sealed, so that a short path of hot air in the sealed box 11 is avoided. By effectively using hot air for indirect heating of garbage N, an energy saving effect can be expected.

  In this way, the garbage N is vacuum-dried. As described above, the rotating drum 1 is placed on the plurality of rollers 14 provided on the gantry 13 disposed on the load cell 12. The load cell 12 measures the mass of the rotary drum 1 before the garbage is thrown in and the mass after the garbage is thrown in, and is controlled by the control means CPU. The difference between the mass before throwing in the garbage and the mass after throwing in the garbage is calculated to calculate the actual input amount of the garbage, and the vacuum drying operation in the rotary drum 1 is performed until the specified mass reduction rate is reached. If this is controlled, it is possible to automatically automatically control the finished and dried state of the garbage with a specified mass reduction rate.

  After the vacuum drying process of the garbage N, when the power switch (not shown) is turned off, the drive of the geared motor is stopped, and the rotating drum is rotated by a plurality of rollers 14 mounted on the mount 13 disposed on the load cell 12. 1 is stopped, heating by the heater 4 is stopped, suction in the rotary drum 1 by the vacuum pump P is stopped, and decompression stops. Thereafter, the lid 18 that has closed the inside of the garbage input / discharge port 2 is opened, and the garbage N that has been vacuum-dried is taken out from the garbage input / discharge port 2.

  Further, since the heater 4 is formed in a U-shaped electric heater, and the electric heater is closely attached to the front and back side surfaces so as to straddle the stirring blade 5, the garbage N is formed by both the front and back surfaces of the stirring blade 5. Can be efficiently heated, and the lead wire of the heater 4 has only one through portion on the side surface of the rotary drum 1, and can be easily manufactured and assembled.

  The present invention is suitable for applications and functions of reducing the stirring power and heating energy for garbage.

FIG. 1 is a longitudinal sectional view showing an embodiment of a vacuum drying apparatus for garbage according to the present invention. FIG. 2 is a cross-sectional view taken along arrow AA in FIG. FIG. 3 is a cross-sectional view showing the vacuum suction means constituting the present embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rotating drum 2 Garbage input and discharge port 3 Rotary joint 4 Heater 5 Stirrer blade 6 Suction port 7 Vacuum suction means 8 Exhaust outlet plate 9 Exhaust port 10 Seal member 11 Sealed box 12 Load cell 13 Base 14 Roller CPU Control means P Vacuum pump

Claims (6)

A rotary drum provided with a garbage input / discharge port on one side and supported rotatably by a rotary joint connected to a vacuum pump at the center on the other side;
A stirring blade attached to the inner wall of the rotating drum and equipped with a heater as a heating source;
A vacuum suction means which is provided so as to be rotatable adjacent to the rotary joint, and has a suction port which is always directed to the upper part in the rotary drum under an upward forcing force;
A vacuum drying apparatus for garbage, which is characterized by comprising:   The vacuum suction means includes a bearing, a weight fixed to the outer peripheral lower surface of the bearing, and is provided symmetrically to the weight on the outer peripheral upper surface of the bearing, and is oriented to the upper portion in the rotating drum by the gravity of the weight. The vacuum drying apparatus for garbage according to claim 1, wherein the vacuum drying apparatus is formed by the suction port.   2. The rotary drum is provided with an exhaust blow plate at a distance so as to cover substantially the upper half in the circumferential direction, and the exhaust blow plate is connected to an exhaust port of the vacuum pump. Or the vacuum drying apparatus of garbage of 2 description.   The rotating drum is exposed from the sealed box so that only one side where the garbage input / discharge port is provided can be rotated through a ring-shaped sealing member, and the other part is in the sealed box. The vacuum drying apparatus for garbage according to any one of claims 1 to 3, wherein the end face of the sealing member is rotatably contacted with a side surface of the sealed box.   The rotating drum is rotatably supported on a plurality of rollers provided on a gantry disposed on the load cell, and the load cell allows the mass of the rotating drum before the garbage is thrown in and the The mass is measured, and the difference between the mass before throwing in the garbage and the mass after throwing in the garbage is calculated to calculate the actual input amount of the garbage. The vacuum drying apparatus for garbage according to claim 1, wherein the vacuum drying operation is controlled by a control means.   The vacuum drying apparatus for garbage according to claim 1, wherein the heater is formed in a U-shaped electric heater, and the electric heater is attached to the front and back side surfaces so as to straddle the stirring blade. .

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