Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F26—DRYING
  • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
  • F26B3/00—Drying solid materials or objects by processes involving the application of heat
  • F26B3/32—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action
  • F26B3/34—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects
  • F26B3/347—Electromagnetic heating, e.g. induction heating or heating using microwave energy
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F26—DRYING
  • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
  • F26B3/00—Drying solid materials or objects by processes involving the application of heat
  • F26B3/32—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action
  • F26B3/34—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects
  • F26B3/343—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects in combination with convection
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F26—DRYING
  • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
  • F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
  • F26B11/02—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles
  • F26B11/04—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis
  • F26B11/0495—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis with provisions for drying by electro-magnetic means, e.g. radiation, microwaves

Definitions

• the present invention relates to a microphone mouth wave rotary dryer capable of drying food processing residues to an optimum moisture content in order to convert high-quality food processing residues into dried food materials and livestock feed.
• the food processing residue is put into a rotating drum, stirred and heated using hot air and microwaves, so that the residue is dried to an optimum moisture content.
• the present invention is also applicable to the case where various foods are dried to produce dried foods (dry foods eaten by humans). Background art
• Composting good-quality food processing residues generated in food processing factories, etc. has low added value (compost price is low).
• adding food processing residues to dry food ingredients and feed instead of compost will add value.
• a dried product obtained by drying the food processing residue can be used as a raw material for a dried food material or compound feed, resources can be effectively used, and this dried product can be used as an expensive commodity (dry food material, compound feed). It can be recycled as raw material). It can also contribute to the self-sufficiency ratio of livestock feed, which is mainly imported.
• the present invention has been made in view of the above circumstances, and has as its object to provide a microphone mouth-wave rotary dryer that can dry food processing residues to an optimum moisture content in order to convert the food processing residues into a dried food material or feed for livestock. And Disclosure of the invention
• a microwave dryer includes: a rotary drum device having a rotary drum; a hot air supply device that generates hot air and distributes the hot air through the rotary drum; It is composed of a microphone mouth wave supply device that supplies a microphone mouth wave.
• the microwave rotary dryer of the present invention comprises: a rotary drum provided with a plurality of lifter blades parallel to an axial direction along a circumferential direction of an inner peripheral surface;
• a rotating drum device consisting of a drum support and drive device that rotates along the direction;
• a duct having a duct inlet portion communicating with one end surface of the rotating drum and a duct outlet portion communicating with the other end surface of the rotating drum, and a duct interposed in the duct and obtained by burning fuel.
• a hot air generator that blows the burned combustion gas into the duct, and a hot air generator that is interposed in the duct.
• a hot air supply device consisting of a circulating blower that blows air inside the duct from the duct inlet to the duct outlet,
• a microwave supply device comprising: a microphone mouth wave oscillation device that generates a microphone mouth wave; and a waveguide that is inserted into the rotation drum from an end face of the rotation drum and guides the generated microwave to radiate into the rotation drum. It is composed of
• the food processing residue is heated in a rotating drum, heated with hot air and microwaves, and uniformly dried in a short time to an optimum moisture content.
• a dried product that can be effectively used as a dried food material or feed for livestock can be obtained.
• the microwave rotary dryer of the present invention includes: a rotary drum provided with a plurality of lifter blades arranged in a state where the rotation axis is horizontal and parallel to the axial direction along a circumferential direction of the inner peripheral surface;
• a rotating drum device consisting of a drum support and a driving device that rotates in the circumferential direction while supporting the rotating drum;
• a duct having a duct inlet portion communicating with one end surface of the rotating drum and a duct outlet portion communicating with the other end surface of the rotating drum, and a duct interposed in the duct and obtained by burning fuel.
• a hot air generator that blows the combustion gas into the duct, and a circulation fan that is interposed in the duct and blows air in the duct from the duct inlet toward the duct outlet.
• a microwave supply device composed of waveguides arranged obliquely.
• the food processing residue can be uniformly dried in a short time by heating it with hot air and microwaves while stirring it in a rotating drum to an optimum water content.
• the dried product can be effectively used as a dried food material or livestock feed.
• the rotating drum is arranged horizontally, the configuration is simplified. Furthermore, absorption efficiency is improved because the waveguides are arranged obliquely and the microphone mouth waves are emitted obliquely toward the lower space in the rotating drum. Further, the microphone mouth wave rotary dryer of the present invention is arranged such that the rotation axis is inclined with respect to the horizontal plane, and the lifter blade parallel to the axial direction is provided at a plurality of locations along the circumferential direction of the inner circumferential surface.
• a rotating drum provided with a spiral spiral blade on an inner peripheral surface that is inclined and lower on the inner peripheral surface, and a drum supporting and rotating along the circumferential direction while supporting the rotating drum
• a duct having a duct inlet portion communicating with one end surface of the rotating drum and a duct outlet portion communicating with the other end surface of the rotating drum; and a duct interposed in the duct.
• a hot-air generator that blows combustion gas obtained by burning fuel into the duct, and directs air inside the duct from the duct inlet to the duct outlet, which is interposed in the duct. Circulating blower A hot air supply device,
• the food processing residue can be uniformly dried in a short time by heating it with hot air and microwaves while stirring it in a rotating drum to an optimum water content.
• the dried product can be effectively used as a dried food material or livestock feed.
• microwaves can be emitted obliquely toward the lower space in the rotating drum, and the absorption efficiency is improved.
• the microwave rotary dryer of the present invention a part of the gas is taken out from the duct of the hot air supply device, and the taken out gas is cooled by cooling water for cooling the microwave oscillation device.
• a deodorizer with a condenser that condenses the vapor contained in the gas and discharges it as drain water to the outside, and discharges the gas from which the vapor has been removed to the outside.
• the deodorizing device is provided with a deodorizing filter that allows gas discharged from the condenser to pass therethrough and then discharges the gas to the outside.
• the present invention provides a food processing residue without generating an odor. Can be performed.
• a grid panel for preventing microwave leakage is provided at the duct inlet and the duct outlet. For this reason, microphone mouth waves do not leak to the outside, and safety is high.
• FIG. 1 is a front sectional view showing a microphone mouth wave rotary dryer according to a first embodiment of the present invention.
• FIG. 2 is a cross-sectional view showing a II-II cross section of FIG.
• FIG. 3 is a front sectional view showing a microphone mouth wave rotary dryer according to a second embodiment of the present invention.
• the microwave rotary dryer 1 includes a rotary drum device 10, a hot air supply device 30, and a microphone mouth wave supply device 50 as main members. I have.
• the food processing residue put into the rotary drum 11 of the rotary drum device 10 is separated by hot air from a hot air supply device 30 and microwaves from a microphone mouth wave supply device 50. It is heated and dried to the optimum moisture content.
• the configuration of each part of the microwave rotary dryer 1 will be described sequentially.
• the rotating drum 11 of the rotating drum device 10 is rotatably arranged with its rotation axis inclined with respect to a horizontal plane. More specifically, the outer peripheral surface of the rotating drum 11 Are mounted with ring members 12a and 12b called "tires". Rotation support rollers 13a and 13b are installed on the floor at different heights.Rotation support roller 13a rolls on ring member 12a and rotates. When the holding roller 13b is in rolling contact with the ring member 12b, the rotating drum 11 is tilted and rotatably supported.
• the output shaft of the driving motor 14 is connected to the rotation support roller 13a. For this reason, when the drive motor 14 rotates forward and reverse, the rotational force is transmitted to the rotating drum 11 via the rotation supporting roller 13a, and the rotating drum 11 rotates forward in the circumferential direction. Reverse rotation.
• a drum supporting device is constituted by the ring members 12a and 12b, the rotation supporting rollers 13a and 13b, and the driving motor 14.
• the inner peripheral surface of the rotating drum 11 is provided with a lifter blade 15 and a spiral blade 16.
• the lifter blades 15 extend in a direction parallel to the rotation axis of the rotary drum 11, and are provided at a plurality of locations along the circumferential direction of the inner peripheral surface of the rotary drum 11.
• the spiral blade 16 is spirally provided on the inner peripheral surface of the rotating drum 11 that is inclined downward (the inner peripheral surface on the right side in FIG. 1).
• a fixed chamber 17 communicates with the left end face of the rotating drum 11, and a fixed chamber 18 communicates with the right end face of the rotating drum 11.
• a rotating bearing 19 is interposed between the fixed chamber 17 and the rotating drum 11, and a sealing material 20 is interposed between the fixed chamber 18 and the rotating drum 11.
• an electromagnetic wave sealing member is disposed on the rotating bearing 19 and the sealing material 20.
• the duct 31 of the hot-air supply device 30 has a duct outlet 31 a communicating with the fixed chamber 17 and a duct inlet 31 b communicating with the fixed chamber 18. That is, the duct outlet 31 a communicates with the left end face of the rotating drum 11 via the fixed chamber 17, and the duct inlet 31 b communicates with the right end of the rotating drum 11 via the fixed chamber 18. It communicates with the surface. As a result, a circulation ventilation path is formed along duct 31 ⁇ fixed chamber 17 ⁇ rotating drum 1 1—fixed chamber 18—duct 31.
• the hot air generator 32 is interposed in the duct 31. The fuel gas G and the air are supplied to the burner 32 a of the hot air generator 32, and the fuel gas G is burned.
• the high-temperature combustion gas generated by the combustion is blown into the duct 31.
• the circulating blower 33 is interposed in the duct 31 and blows the air in the duct 31 from the duct inlet 31b to the duct outlet 31a. Therefore, the high-temperature combustion gas flows along the circulation ventilation path, and the high-temperature combustion gas flows in the rotating drum 11.
• the microphone mouth wave oscillator 51 of the microphone mouth wave supply device 50 generates a microphone mouth wave.
• the waveguide 52 is a tube member that guides the microphone mouth wave generated by the microphone mouth wave oscillator 51 into the rotating drum 11 and penetrates the fixed chamber 17 from the left end face of the rotating drum 11. It is inserted into the rotating drum 11.
• the waveguide 52 is arranged so as to be inclined with respect to the horizontal plane, and the axial direction of the waveguide 52 and the rotation axis of the rotating drum 11 match.
• the opening face of the distal end of the waveguide 52 is open obliquely downward. Therefore, the microwave guided by the waveguide 52 is radiated toward the lower space in the rotating drum 11. That is, the microwave radiated from the tip opening surface does not travel along the axial direction of the waveguide 52, but along the direction in which the tip opening surface faces (the direction toward the lower space in the rotating drum). It goes on. As a result, the microwave is efficiently incident on the food processing residue that is thrown into the space below the rotating drum 11 as a processed product. That is, since the microwave is obliquely incident on the surface of the food processing residue, the microwave is efficiently absorbed from the surface of the food processing residue.
• the angle between the opening face of the waveguide 52 and the axial direction of the waveguide 52 is 10 to 80 degrees.
• a Teflon cap 53 is attached to the open end of the waveguide 52. Since the Teflon cap 53 is formed of Teflon that can completely transmit microwaves, it does not interfere with the propagation of microwaves. The presence of the teflon cap 53 prevents water vapor and dust from entering the waveguide 52.
• the waveguide 52 is provided with an isolator 54 and a power monitor 55.
• the isolator 54 reflects the radiated microwave inside the rotating drum 11 Absorbs the reflected microwave power that returns through the inside of 52. Therefore, the microwave reflected power does not return to the microwave oscillator 51, and the microwave oscillator 51 is prevented from being damaged due to the return of the microwave reflected power.
• the power monitor 55 measures and represents the value of the microwave incident power emitted from the microwave oscillator 51 and the value of the microwave reflected power returning through the waveguide 52.
• An input hatch 60 serving as an input port for food processing residues is attached to the peripheral surface of the rotating drum 11 so as to be freely opened and closed.
• a slide hatch 61 serving as an outlet for the dried material is attached to the right end face of the rotating drum 11, and can slide with respect to the fixed chamber 18.
• the slide hatch 61 comes into close contact with the right end face of the rotating drum 11 and the outlet is closed by clamping the slide hatch 6 1 and the right end face of the rotating drum 11 with the clamp 62, and the clamp 62 is released Then, the slide hatch 61 slides and moves away from the right end face of the rotating drum 11 to open the outlet.
• the exhaust pipe 71 of the deodorizing device 70 is connected to the duct 31 and takes out a part of gas (including steam and odor) from the duct 31.
• a condenser 72 is interposed in the exhaust pipe 71. Cooling water that has cooled the microwave oscillator 51 and the isolator 54 flows through the condenser 72, and the vapor contained in the gas extracted from the duct 31 is condensed and drained. It becomes water W. The odor dissolves in the drain water W, so the odor can be removed.
• a deodorizing filter 73 filled with activated carbon may be added to further remove the odor in the gas. Since the gas passing through the deodorizing filter 73 has its vapor removed by the condenser 72, the life of the activated carbon is prolonged.
• the duct panels 80 and 81 are provided at the duct entrance 31b and the duct exit 31a. This has increased safety.
• the rotating drum 11 By controlling the drive of the drive motor 14, the rotating drum 11 is rotated, When the charging hatch 60 is positioned on the upper peripheral surface, the rotation of the rotating drum 11 is stopped. In this state, the charging hatch 60 is opened, and high-quality food processing residues generated in a food processing factory or the like are collectively charged into the rotating drum 11. Then close the input hatch 60. At this time, slide hatch 61 is also closed. The water content of the input food processing residue is 80 to 60 wt%.
• the rotary drum 11 By controlling the drive of the drive motor 14, the rotary drum 11 is rotated forward. At the same time, the hot air supply device 30 is operated to circulate hot air into the rotating drum 11. As the rotating drum 11 rotates, the food processing residue accumulated below the rotating drum 11 is lifted up along the circumferential direction by the lifter blade 15, and from the top when approaching the circumferential top. Fall down. For this reason, the food processing residue is heated while being efficiently contacted with hot air while being stirred in the rotating drum 11. In this way, the food processing residue is heated by hot air, so that the contained water evaporates and dries. Heating by hot air is performed by conducting heat from the surface of the food processing residue to the inside, so that the food processing residue dries in order from the surface side. In order to prevent carbonization of food processing residues, the temperature of hot air is kept at around 120 to 150 ° C.
• microwave supply device 50 When a predetermined period of time has elapsed since the start of hot air heating, the microwave supply device 50 is operated while the heating by the hot air supply device 30 is continued, and microwaves are radiated into the rotating drum 11. . For this reason, food processing residues are also heated by microwaves (microwave induction heating).
• the microwave Since the end opening surface of the waveguide 52 is opened obliquely downward, the microwave is radiated toward the space below the rotating drum 11, that is, the portion where the food processing residue is present. Since the lifter blade 15 made of metal is rotating in the circumferential direction, the electric field strength in the rotating drum 11 changes with the movement of the lifter blade 15. In other words, the microwave distribution of the microwave changes in intensity without becoming a standing wave in the rotating drum 11, so that the microwave (radio wave) is stirred inside the rotating drum 11. As a result, the emitted microwaves are efficiently and reliably absorbed by the food processing residue. In this way, the food processing residue in the rotating drum 11 can be dried by heating the microwave with good uniformity without unevenness.
• the above-mentioned microwave heating is a so-called “internal heating” in which microwaves penetrating into the food processing residue (dielectric) are converted into heat by dielectric loss to heat from inside the food processing residue, so-called “internal heating”, and rapid heating is possible. In addition, it has the function of pushing out the moisture inside. Heating with hot air is what is called “external heating” in which food processing residues are heated from the surface side. Since food processing residues are heated by external heating using hot air and internal heating using microwaves, both the inside and the outside are heated uniformly, drying quickly and without drying unevenness.
• the drying speed is slowed by hot air drying alone, and the drying time is prolonged.
• the water is pushed out to the surface, and the drying speed is increased to shorten the drying time.
• microwaves are selectively absorbed in a high-moisture environment and generate heat, uneven drying is less likely to occur and uniform drying can be promoted.
• Food processing residues are heated and dried, turning into dried products.
• the dried product is sterilized by temperature rise and microwave irradiation.
• the dried product obtained by drying the food processing residue is crushed by the agitation by the lifter blade 15 to become fine and granular. Since the rotating drum 11 is inclined, the dried product is lifted up by the lifter blade 15 and then dropped. Gradually move to The dried matter that has moved to the right side of the rotating drum 11 and accumulated there is pushed up by the spiral blade 16 toward the left end side (the inclined upper part).
• the heating by the hot air supply device 30 and the microwave supply device 50 is stopped, and the rotating drum is stopped. 1 Stop the rotation of 1.
• the microwave rotary dryer 1 is suitable for commercialization as a large-sized dryer capable of batch processing (batch processing) a large amount of food processing residues.
• Dispensing can be performed, and dry matter can be easily removed in a short time.
• the volume of the dried product that has reached the target moisture content (for example, 1 O wt%) is about 1/5 of the volume of the original food processing residue (water content of 80 to 60 wt%), and is reduced. ing . Therefore, transportation and storage of the dried product can be easily performed. In addition, the microwaves are radiated while being heated, so the growth of microorganisms in the dried product is suppressed and the safety is high. Therefore, this dried product can be effectively used as a raw material of a dried food material or a compound feed.
• microwave supply device 50 since the microwave supply device 50 is operated during drying, power consumption can be reduced. Energy saving can be achieved by optimally adjusting the temperature of the hot air generated from the hot air supply device 30, the timing of microwave heating input, and the drying time according to the input amount and moisture content of food processing residues. I try to do it.
• the charging hatch 60 and the slide hatch 61 are opened, and the inside of the rotary drum 11 can be cleaned, so that the dryer can be used hygienically.
• the microwave rotary dryer 101 according to the second embodiment the basic configuration of using both hot air drying and microwave drying is the same as that of the microwave rotary dryer according to the first embodiment shown in FIG. 1 and FIG. Same as the tumble dryer 1 but partially differs in the arrangement and configuration. For this reason, the description will focus on the parts that are different from the microwave rotary dryer 1 of the first embodiment, and the parts that perform the same function will be assigned the same reference numerals, and redundant description will be omitted.
• the rotating drum device 10 The rotating drum 11 is rotatably supported by rotation supporting rollers 13a and 13b with its rotating shaft being horizontal. Further, only the lifter blade 15 is provided on the inner peripheral surface of the rotating drum 11, and no spiral blade is provided.
• a rotating bearing 19 is interposed between the fixed chamber 17 and the rotating drum 11, and a rotating bearing 21 is similarly interposed between the fixed chamber 18 and the rotating drum 11.
• the waveguide 52 of the wave supply device 50 is arranged so as to be inclined with respect to the horizontal plane, and the opening surface at the tip end of the waveguide 52 is perpendicular to the waveguide axis direction. . Therefore, the microwave guided from the microwave oscillator 51 and emitted from the opening face of the tip of the waveguide 52 travels along the waveguide axis direction. Therefore, the microwave is radiated toward the space below the rotating drum 11 and efficiently enters the food processing residue introduced into the rotating drum 11. In this case, while the rotating drum 11 is disposed horizontally, the waveguide 52 is disposed obliquely, so that the microwave is obliquely incident on the surface of the food processing residue and is efficiently absorbed. .
• An input / output hatch 63 serving as an input port and an output port is mounted on the peripheral surface of the rotating drum 11 so as to be freely opened and closed.
• the input and output hatch 63 is a member that is long along the axial direction of the rotating drum 11.
• the input hatch 60 serving as an inlet and the slide hatch 61 serving as an outlet are provided.
• one input hatch which also serves as an inlet and an outlet is provided.
• the input / exit hatch 6 3 is a member that is long in the axial direction, so almost all of the dry matter is on the input / exit hatch 6 3 before opening, so the input / exit hatch 6 3 is opened. Just dry the weight It can be easily dropped and discharged to the outside.
• the rotary drum 11 is horizontally arranged, and a single input / exit hatch 63 that doubles as an input port and an output port is provided. Since it is configured to be dropped and taken out, the mechanism of discharging and discharging can be simplified, and it is particularly suitable to be commercialized as a small-sized dryer that batch-processes (batch-processes) food processing residues.
• the loading / unloading hatch 63 is opened, and the inside of the rotating drum 11 can be cleaned, so that the dryer can be used hygienically.
• the configuration and operation of the other parts are the same as in the first embodiment.
• the microwave rotary dryer according to the present invention is suitable for use in the industrial field of producing dried food materials, livestock feed, and dried food by drying food processing residues—various foods.

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• Engineering & Computer Science (AREA)
• Microbiology (AREA)
• Life Sciences & Earth Sciences (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Molecular Biology (AREA)
• Health & Medical Sciences (AREA)
• Biotechnology (AREA)
• Biomedical Technology (AREA)
• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Drying Of Solid Materials (AREA)
• Processing Of Solid Wastes (AREA)

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Citations (7)

• 2000
  • 2000-07-18 WO PCT/JP2000/004810 patent/WO2001007850A1/ja active IP Right Grant
  • 2000-07-18 JP JP2001512236A patent/JP3611318B2/ja not_active Expired - Fee Related
  • 2000-07-18 KR KR10-2001-7003523A patent/KR100389177B1/ko not_active IP Right Cessation
  • 2000-07-21 TW TW089114639A patent/TW561239B/zh not_active IP Right Cessation

Patent Citations (7)

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