WO2017171133A1 - Appareil de séchage de déchets alimentaires de type à circuit fermé pour prévenir une odeur au moyen d'une chaudière à huile à milieu thermique utilisant un gaz en tant que source de chaleur - Google Patents

Appareil de séchage de déchets alimentaires de type à circuit fermé pour prévenir une odeur au moyen d'une chaudière à huile à milieu thermique utilisant un gaz en tant que source de chaleur Download PDF

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Publication number
WO2017171133A1
WO2017171133A1 PCT/KR2016/004641 KR2016004641W WO2017171133A1 WO 2017171133 A1 WO2017171133 A1 WO 2017171133A1 KR 2016004641 W KR2016004641 W KR 2016004641W WO 2017171133 A1 WO2017171133 A1 WO 2017171133A1
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WO
WIPO (PCT)
Prior art keywords
drying apparatus
medium oil
food waste
gas
heat medium
Prior art date
Application number
PCT/KR2016/004641
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English (en)
Korean (ko)
Inventor
최신묵
Original Assignee
주식회사 가이아
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Publication of WO2017171133A1 publication Critical patent/WO2017171133A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/06—Controlling, e.g. regulating, parameters of gas supply
    • F26B21/08—Humidity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00—Heating arrangements
    • F26B23/10—Heating arrangements using tubes or passages containing heated fluids, e.g. acting as radiative elements; Closed-loop systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B1/00—Preliminary treatment of solid materials or objects to facilitate drying, e.g. mixing or backmixing the materials to be dried with predominantly dry solids
    • F26B1/005—Preliminary treatment of solid materials or objects to facilitate drying, e.g. mixing or backmixing the materials to be dried with predominantly dry solids by means of disintegrating, e.g. crushing, shredding, milling the materials to be dried
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/06—Controlling, e.g. regulating, parameters of gas supply
    • F26B21/08—Humidity
    • F26B21/086—Humidity by condensing the moisture in the drying medium, which may be recycled, e.g. using a heat pump cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/06—Controlling, e.g. regulating, parameters of gas supply
    • F26B21/10—Temperature; Pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/14—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects using gases or vapours other than air or steam, e.g. inert gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/14—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects using gases or vapours other than air or steam, e.g. inert gases
    • F26B21/145—Condensing the vapour onto the surface of the materials to be dried
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00—Heating arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00—Heating arrangements
    • F26B23/001—Heating arrangements using waste heat
    • F26B23/002—Heating arrangements using waste heat recovered from dryer exhaust gases
    • F26B23/004—Heating arrangements using waste heat recovered from dryer exhaust gases by compressing and condensing vapour in exhaust gases, i.e. using an open cycle heat pump system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/005—Treatment of dryer exhaust gases
    • F26B25/007—Dust filtering; Exhaust dust filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
    • F26B2200/04—Garbage

Definitions

  • the present invention relates to a food waste drying apparatus for heating a heat medium oil used for drying a drying apparatus using a heat medium oil gas boiler using a gas fuel, and the heat medium oil having a structure in which the drying apparatus and the gas boiler are circulated with each other. It is about.
  • the thermal expansion is not uniform in the space where the thermal oil is filled or the heated temperature is not uniform, and the thermal efficiency is also low. Occurred.
  • the present invention has been made to solve the above problems, and after heating the heat medium oil using a heat medium oil gas boiler having a gas as a heat source, it is filled and circulated in the lower end of the drying apparatus, crushed in the drying apparatus It is possible to dry the food waste to be used, and the heat medium oil used for drying is introduced into the gas boiler after use and reheated to have a circulation structure which is supplied to the drying apparatus, and at the same time, it is generated during drying in the drying apparatus. It also has a closed-circuit structure that does not discharge the odor water vapor to the outside and re-introduces it after filtering and condensing it. It is to provide a closed circuit food waste drying apparatus for preventing odors.
  • the present invention is a means for solving the above problems, the heating device is filled with a heating heat medium oil, the drying device 10 to dry the food waste inside the top; A crushing means (20) installed inside the drying apparatus (10) to crush food waste; A condenser (50) for removing moisture by condensing odorous water vapor generated in the drying apparatus (10); In order to provide the heated heating medium to the drying apparatus 10, after heating the heating medium oil using a gas fuel outside the drying apparatus 10, the heating medium oil for introducing the heated heating medium oil into the drying apparatus 10.
  • Gas boiler 90 It includes, but is made, by reflowing the odorous water vapor passed through the condenser 50 in the drying apparatus 10, to form a odorous steam closed circuit circulating structure to be reused as drying heat drying the food waste, the odorous steam
  • the heat medium oil is characterized in that it forms a heat medium oil circulation structure that is heated and reused while circulating the drying apparatus 10 and the heat medium gas boiler 90.
  • the present invention is used to heat the heat medium oil using a heat medium oil gas boiler using the gas as a heat source, and filling it in a drying device, the heat medium oil is introduced into the heat medium oil gas boiler is circulated again
  • a structure unlike the conventional, uniform heat transfer of drying heat for drying is possible over the entire crushing chamber internal space of the drying apparatus, not only to prevent heat transfer efficiency reduction, but also easy to control / manage the heat medium oil.
  • the service life of the device can also be increased.
  • the present invention provides a high temperature odor water vapor generated when drying food waste, it is not discharged to the outside, it is possible to have a closed circuit structure that is re-introduced into the drying apparatus after the odor and condensate water is removed, the odor is not generated Does not work.
  • the present invention has an effect of increasing the crushing efficiency by improving the structure of the crushing means for crushing food waste.
  • Figure 1 is a block diagram of an embodiment showing the configuration of the odor prevention closed-circuit food waste drying apparatus using a heat medium oil boiler using the gas as a heat source and the flow of odor water vapor.
  • FIG 2 and 3 are views of one embodiment showing the circulation structure of the heat medium oil according to the present invention.
  • Figure 4 is a perspective view of one embodiment showing a shredding means according to the present invention.
  • shredding means 21 the main rotary shaft
  • first fracture shaft 23 second fracture shaft
  • the present invention has the following features to achieve the above object.
  • the heating device is filled with the heated heat medium oil circulated at the bottom, the drying device 10 to dry the food waste inside the top;
  • a crushing means (20) installed inside the drying apparatus (10) to crush food waste;
  • a condenser (50) for removing moisture by condensing odorous water vapor generated in the drying apparatus (10);
  • the heating medium oil for introducing the heated heating medium oil into the drying apparatus 10.
  • Gas boiler 90 It includes, but is made, by reflowing the odorous water vapor passed through the condenser 50 in the drying apparatus 10, to form a odorous steam closed circuit circulating structure to be reused as drying heat drying the food waste, the odorous steam
  • the heat medium oil is characterized in that it forms a heat medium oil circulation structure that is heated and reused while circulating the drying apparatus 10 and the heat medium gas boiler 90.
  • the shredding means 20 includes: first and second shredding shafts 22 and 23 protruding from the outer periphery of the main rotary shaft 21 in different directions and alternately; A plurality of first shredding blades 24 having an arc shape which are installed in a form of continuously connecting outer circumferences of the first and second shredding shafts 22 and 23 to shred food waste at the stop side of the drying apparatus 10; A plurality of second shredding blades (25) having an arc shape which is installed in a form of continuously connecting end portions of the first and second shredding shafts to shred food waste outside the first shredding blades (24); Auxiliary crushing blade (26) for crushing food waste by forming a plurality of protruding in the longitudinal direction toward both inner circumferential surface of the inside of the drying apparatus (10) on both ends of the crushing shaft of the main rotary shaft (21); Guide pieces 27 protruding from the inner peripheral surfaces of both sides of the drying apparatus 10 so as to correspond to empty spaces between the plurality of auxiliary crushing
  • the odor water vapor discharged from the condenser 50 is installed in the pipeline into the drying device 10, the pipe by the condensate pump device 81
  • the condensate that cleans the inside is prevented from flowing into the drying apparatus 10 due to the pressure, and the liquid condensate in the liquid state flows back into the condensate tank, and only the non-condensed hot water vapor is circulated into the drying apparatus 10.
  • Device 70 Heat medium oil using a gas boiler, characterized in that is further provided as a heat source.
  • the primary dust filter 30 is installed in the drying device 10, and filters the foreign matter of the malodorous steam generated in the drying device 10;
  • a secondary dust filter 40 for filtering residual impurities in steam not filtered by the primary dust filter 30 and then flowing the condenser 50;
  • a blower (60) for transferring the malodorous water vapor passed through the condenser (50) to the buffer device (70);
  • a condensate tank (80) for storing condensate generated in various apparatuses connected to the drying apparatus (10); Characterized in that further comprises.
  • the heat medium oil gas boiler 90 measures the temperature sensor installed in the drying apparatus 10, so that the heat medium oil gas boiler 90 ON / OFF operation is controlled so that the heat medium always maintains a predetermined temperature range.
  • the gas supply amount is controlled in a state in which the heat medium oil gas boiler 90 is always driven.
  • FIGS. 1 to 4 a closed circuit food waste drying apparatus for preventing odor using a heat medium oil boiler having a gas as a heat source according to a preferred embodiment of the present invention will be described in detail with reference to FIGS. 1 to 4.
  • the closed-circuit food waste drying apparatus for preventing odor using a thermal oil boiler using gas as a heat source includes a drying apparatus 10, crushing means 20, a primary dust filter 30, 2
  • the primary dust filter 40, the condenser 50, the blower 60, the buffer device 70, the condensate tank 80, and the thermal oil gas boiler 90 are included.
  • the drying apparatus 10 is a food waste that is the object of crushing and drying is input, where the process of crushing and drying is in progress, the drying apparatus 10 is rotated crushing means 20 to be described later in the upper end
  • the combustion unit is installed at the lower end of the crushing unit 11 and the crushing unit 11 in which the crushing unit 20 is installed.
  • the heat medium oil heated in the heat medium oil gas boiler 90 is introduced, and after heating the drying apparatus 10, the structure is discharged to the heat medium gas boiler (90) Has
  • the crushing means 20 is rotatably installed in the crushing portion 11 in the above-described drying apparatus 10 in the longitudinal direction, to crush the object (food waste) introduced into the drying apparatus 10.
  • Device The crushing means 20 is rotatably installed in the crushing portion 11 in the above-described drying apparatus 10 in the longitudinal direction, to crush the object (food waste) introduced into the drying apparatus 10.
  • the crushing means 20 includes a main rotary shaft 21 rotatably installed in the crushing portion 11 in a transverse direction, and first and second protrusions protruding in a different direction from each other in the longitudinal direction on the main rotary shaft 21.
  • Crushing shafts 22, 23 first crushing shaft 22, when projecting in the up and down direction on the outer periphery of the main rotary shaft 21, the second crushing shaft 23 is perpendicular to the first crushing shaft 22
  • a plurality of first shredding blades 24 having an arc shape, connecting the stop portions of the first and second shredding shafts 22 and 23 to each other, and protruding in the forward and rearward directions. End portions of the first and second shredding shafts 22 and 23 are connected to each other, and are composed of a plurality of second shredding blades 25 having an arc shape.
  • a plurality of auxiliary crushing blades 26 are directed toward the inner wall of the drying apparatus 10 in the longitudinal direction of the crushing shaft.
  • the protrusions are formed on the inner wall of the drying apparatus 10 such that the plurality of guide pieces 27 protrude from each other so as to correspond to empty spaces between the plurality of auxiliary crushing blades 26. .
  • the plurality of guide pieces 27 are positioned between the auxiliary crushing blades 26 and the auxiliary crushing blades 26 so that the guide and rotational radial positions of the plurality of auxiliary crushing blades 26 do not change.
  • the primary dust filter 30 is communicatively installed inside or on one side of the crushing unit 11 of the drying apparatus 10 to primarily filter various foreign substances and dust contained in the dry steam generated in the drying apparatus 10. It is to play a role.
  • the secondary dust filter 40 is connected to the outside of the primary dust filter 30 and the drying apparatus 10, to filter the remaining foreign matter and dust in the dry steam that was not filtered by the primary dust filter 30 to the secondary It plays a role.
  • the dry steam is filtered while passing through the secondary dust filter 40, the condensed water generated while the heated steam cools is discharged to the condensate tank 80 to be described later.
  • the primary dust filter 30 and the secondary dust filter 40 is for the purpose of removing dust and foreign matter in the steam, various kinds can be used by the user.
  • the condenser 50 passes through the first and second dust filters 30 and 40 where dry steam from which dust is removed is introduced. In order to remove water vapor contained in the incoming steam, condensed inlet steam is provided. The condensate generated at this time serves to store in the condensate tank (80).
  • the condenser 50 allows the outside air to pass through a plurality of fans outside the flow pipe into which the steam flows, thereby cooling the steam flowing inside the flow pipe to remove moisture contained in the steam. : Air-cooled condenser, etc.)
  • the blower 60 reflows the steam (high temperature steam) passed through the condenser 50 to the drying apparatus 10 so as to have a structure in which malodorous steam is recycled, and a blower and a blower And the like can be used.
  • the buffer device 70 is a place through which the uncondensed odorous water vapor (temperature is raised) that has passed through the condenser 50 described above is introduced into the drying device 10, and the pressure in the pipe line is higher than the pressure introduced into the pipe line. If this rises further (when excessive malodorous vapor is generated and the internal pressure unexpectedly rises excessively), it is a place that discharges the pressure to the outside and compensates for the pressure.
  • the condensate is discharged into the condensate tank 80.
  • Such a buffer device 70 when the condensed water is supplied to the blower 60 from the condensate tank 80 for the internal cleaning of the secondary dust filter 40 described above, when the condensate is over-supplied, a part of the Since it may be introduced back into the drying apparatus 10, it may have a function of preventing residual condensate from flowing into the drying apparatus from the buffer device 70 beforehand.
  • the odorous water vapor discharged from the condenser 50 is installed in the pipeline into the drying apparatus 10, and the condensate that cleans the inside of the pipe by the condensate pump apparatus 81 is caused by the pressure of the drying apparatus 10. ),
  • the condensate in the liquid state is introduced into the condensate tank again, and serves to circulate only the non-condensed high-temperature steam into the drying apparatus 10.
  • the condensate tank 80 is a place where the condensed water generated in the various devices connected to the drying apparatus 10 is stored, and the secondary dust filter 40, the condenser 50, the buffer device 70, and the like are stored in the condensate tank 80. It is a place where condensate generated is collected in one place.
  • some of the condensate stored in the condensate tank 80 may be supplied to the blower 60 according to a user's embodiment, so that the condensate may be used for cleaning the inside of the pipe and the blower 60.
  • the thermal oil gas boiler 90 is for drying food waste that is crushed and crushed in the above-described drying apparatus 10.
  • the heat medium oil gas boiler (90) for this purpose is to heat the heat medium oil using gas fuel, and then supply it to the bottom of the drying apparatus (10) through a separate inlet pipe, the high temperature (ex: 150) supplied to the drying apparatus °C or more) heat medium oil is used to dry food waste inside the drying apparatus 10, the used heat medium oil is again introduced into the heat medium oil gas boiler (90) through the discharge pipe by the heat medium oil circulation pump (91) To repeat the reheating cycle.
  • a flame is generated toward the inner longitudinal direction (from the top to the bottom) through a gas burner 90A through which gas fuel (ex: natural gas (LNG), etc.) is introduced. , Through such a flame, is heated in a double spiral inside the heat medium oil gas boiler 90 to heat the heat medium tube through which the heat medium oil flows, thereby providing a heated heat medium oil.
  • gas fuel ex: natural gas (LNG), etc.
  • the heat medium oil circulation pump 91 is naturally installed on the conduit.
  • the expansion tank 92 is installed on the pipeline through which the heat medium oil is circulated, and as the heat medium oil is continuously circulated in a heated state, the pressure in the pipe is increased and the volume is also raised to prevent damage to the device. The pressure of the expanded portion can be released to the outside.
  • the heat medium oil gas boiler 90 selectively uses the following two control methods such that the temperature of the heat medium oil provided by heating is always maintained in a predetermined temperature range (ex: 175 ° C ⁇ 10 ° C). do.
  • the first is to control the ON and OFF driving of the thermal oil gas boiler 90.
  • the thermal oil gas boiler 90, the gas burner 90A, and the thermal oil circulation pump 91 are operated to adjust the temperature of the thermal oil. Heating to the range, when the heat medium oil reaches the preset temperature range (or above the preset temperature range), the gas burner (90A) is turned off, and then when the heat medium oil is outside the preset temperature range (temperature lower than the preset temperature range) The gas burner 90A is turned on to restart the control.
  • the thermal fluid circulation pump 91 should be always driven, and in order to measure the preset temperature range, a plurality of positions (chambers (lower) in which the thermal fluid is stored in the drying apparatus 10, the drying apparatus 10)
  • the temperature sensor is mounted on the side plate, the heat medium oil inlet of the lower part of the drying apparatus 10, the heat medium oil inlet of the top of the drying apparatus 10, and the like.
  • it should be always compared with (such as determining the preset temperature range by combining the temperatures of the plurality of temperature sensors, or determining the preset temperature range based on one of the temperature sensors).
  • the second is PID control (proportional control) which controls the gas supply amount while the gas burner 90A is always driven.
  • the gas burner 90A is first driven to heat the heat medium oil, and the temperature of the heated medium oil is When the temperature is above the highest temperature (high value) of the set temperature range, unlike the first embodiment, the gas burner 90A is not turned off, and the gas combustion is stopped while adjusting to the amount of gas suitable for the current temperature before reaching the high value. Without this, the thermal oil temperature can be kept constant according to a preset temperature range.
  • This second control method can keep the temperature deviation constant without large change, resulting in efficiency increase and gas amount reduction.
  • ON / OFF drive control is suitable for small and medium machines, and proportional control is suitable for large machines, but it is selected according to various embodiments of the user regardless of the size of the device. Of course this is possible.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Processing Of Solid Wastes (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

La présente invention concerne un appareil de séchage de déchets alimentaires de type à circuit fermé pour prévenir une odeur au moyen d'une chaudière à huile à milieu thermique utilisant un gaz en tant que source de chaleur et, plus particulièrement, un appareil de séchage de déchets alimentaires de type à circuit fermé pour prévenir une odeur au moyen d'une chaudière à huile à milieu thermique utilisant un gaz en tant que source de chaleur, l'appareil comprenant une structure pour chauffer une huile de milieu thermique au moyen d'une chaudière à gaz à huile à milieu thermique, remplir et utiliser l'huile chauffée dans l'appareil de séchage, et introduire l'huile de milieu thermique utilisée à nouveau dans la chaudière à gaz à huile à milieu thermique et réchauffer l'huile introduite ; et l'appareil comprenant une structure de circuit fermé pour filtrer et condenser la vapeur d'eau odorante générée dans l'appareil de séchage et ensuite, introduire la vapeur d'eau filtrée et condensée dans l'appareil de séchage sans évacuer la vapeur d'eau odorante à l'extérieur, de sorte que l'appareil de séchage puisse améliorer l'efficacité thermique et empêcher la génération de mauvaises odeurs.
PCT/KR2016/004641 2016-03-31 2016-05-03 Appareil de séchage de déchets alimentaires de type à circuit fermé pour prévenir une odeur au moyen d'une chaudière à huile à milieu thermique utilisant un gaz en tant que source de chaleur WO2017171133A1 (fr)

Applications Claiming Priority (2)

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KR10-2016-0039262 2016-03-31
KR1020160039262A KR101812104B1 (ko) 2016-03-31 2016-03-31 가스를 열원으로 하는 열매체유 보일러를 이용한 악취방지용 폐쇄회로형 음식물 쓰레기 건조장치

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CN109282583A (zh) * 2018-09-26 2019-01-29 珠海格力电器股份有限公司 烘干系统的控制方法
CN110057184A (zh) * 2019-05-23 2019-07-26 江苏利百川环保科技有限公司 一种干燥输送装置
CN111504023A (zh) * 2020-04-22 2020-08-07 南宁学院 一种生活垃圾环保处理装置

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KR102126462B1 (ko) * 2019-02-27 2020-06-24 고등기술연구원연구조합 하이브리드 건조시스템 및 이를 이용한 건조방법
KR102342186B1 (ko) 2019-10-31 2021-12-22 코스탈 주식회사 음식물 쓰레기 처리장치
CN113048752B (zh) * 2019-12-27 2022-11-01 株式会社盖亚 再利用烘干时产生的蒸气的食物垃圾烘干物减量干燥机
KR102512708B1 (ko) 2022-05-19 2023-03-22 김남수 고체연료와 마이크로파를 이용한 보일러

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