CN100483056C - Kitchen garbage drying device and method - Google Patents
Kitchen garbage drying device and method Download PDFInfo
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- CN100483056C CN100483056C CNB2007103060076A CN200710306007A CN100483056C CN 100483056 C CN100483056 C CN 100483056C CN B2007103060076 A CNB2007103060076 A CN B2007103060076A CN 200710306007 A CN200710306007 A CN 200710306007A CN 100483056 C CN100483056 C CN 100483056C
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- 238000001035 drying Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000010813 municipal solid waste Substances 0.000 title claims description 26
- 239000010794 food waste Substances 0.000 claims abstract description 79
- 238000007599 discharging Methods 0.000 claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims description 21
- 230000005540 biological transmission Effects 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000007689 inspection Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 239000002912 waste gas Substances 0.000 claims description 6
- 238000009795 derivation Methods 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 4
- 230000008676 import Effects 0.000 claims description 3
- 239000011490 mineral wool Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims 8
- 239000011229 interlayer Substances 0.000 claims 1
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- 238000007790 scraping Methods 0.000 claims 1
- 244000052616 bacterial pathogen Species 0.000 abstract description 5
- 241000894006 Bacteria Species 0.000 abstract description 4
- 235000013305 food Nutrition 0.000 abstract description 3
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- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
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- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
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- DNJIEGIFACGWOD-UHFFFAOYSA-N ethanethiol Chemical compound CCS DNJIEGIFACGWOD-UHFFFAOYSA-N 0.000 description 1
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- 239000003337 fertilizer Substances 0.000 description 1
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Abstract
The invention relates to a device for desiccating food residue and method thereof, specifically to a device for drying food residue and method thereof. The inventive food residue drying device comprises a feeding rotary joint (1), a feeding pipe (2), a hollow disc (3), a conduit (4), a feed inlet (5), an exhaust pipe (6), a checking port (7), a shell (8), a scraper blade (9), propellers (10), a coil pipe (11), a hollow shaft (12), a discharge rotary joint (13), a discharge pipe (14), a discharge port (15) and a supporting seat (16). The inventive food residue drying method comprises the following steps of: feeding high-temperature heat-conducting media into the rotary hollow shaft, hollow disc and coil pipe from the feeding pipe to dry the food residue in the shell through uniform heating of the hollow cavity wall, mixing the food residue by the propellers on the hollow disc and coil pipe and the scraper blade on the inner wall of the shell to move the food residue toward the discharge port at uniform speed, and discharging the exhaust gas generated during drying process to a following exhaust gas treatment device. The inventive drying device and method can rapidly dry food residueand kill noxious bacteria and pathogenic bacteria in the food residue, so as to ensure the sanitation and safety of the food residue.
Description
Technical field
The present invention relates to a kind of desiccation apparatus and method, relate to a kind of desiccation apparatus and method of changing food waste particularly.
Background technology
Along with urbanization process is accelerated, people's living standard significantly improves, the food and restaurant service industry fast development.Yet,, cause a large amount of changing food wastes to produce because the intrinsic living and diet of China is accustomed to and is had the part wasting phenomenon.Changing food waste is a kind of rotten organic waste that ferments that is easy to, past is often directly transported to the rural area as pig, chicken feed etc. by the lawless person, because processes such as non-sterile, harmless treatment, changing food waste is directly fed domestic animals and fowls such as pig, chicken and is caused pathogen to propagate and the homology biological pollution easily, these " rubbish pigs ", " rubbish chicken " further enter the human foods chain, can form potential food security hidden danger.
The direct sanitary landfills of changing food waste is handled, and will cause the landfill yard moisture to increase, and the stench that rubbish fermentation produces also can cause serious secondary pollution to environment.The direct landfill disposal of changing food waste is forbidden by strictness in many developed countries.
At present, changing food waste handles that one of the most effective way is the dryingization processing.The dryingization processing is promptly directly or indirectly heated changing food waste by thermal medium, evaporating water, deactivation pathogenic bacteria simultaneously, and keep consistency such as protein in the changing food waste, fat, cellulose, can be used as the feed of non-homology animals such as soil and fertilizer and fish after the processing of changing food waste dryingization.Although the direct-fired mummification method thermal efficiency is higher, but directly heat changing food waste by combustion flame, the difficult control of process, heating surface (area) (HS is little, heat inhomogeneously, cause that easily local changing food waste burns in the drying equipment, particularly have in the changing food waste hidden dangers such as combustible burning or circuit catch fire, therefore, there is more problem in extensive the use on engineering.Yet; indirect is very effective drying method, but traditional indirect mode exists that heat transfer area is little, thermal loss big, the glutinous easily rubbish that connects on the heat transmission medium, reduces shortcomings such as heat transference efficiency; also need the artificial cleaning of shutting down simultaneously, influenced the operational efficiency of equipment.For the indirect container of airtight operation, steam pressure is big in the container, and rate of drying is low, and has potential safety hazard.In addition, a large amount of sour gas corrodes the container wall easily, reduces heating container service life.
The changing food waste water content is higher, its moisture accounts for the 75%-85% of rubbish total amount, be unfavorable for conventional process such as landfill, burning, compost, pyrolysis, conventional process easily produces pernicious gas, its percolate easily causes secondary pollution to soil, groundwater environment, and processing cost is too high, excessive cycle.
At the deficiency of traditional treatment method, therefore, create a kind of high efficiency of mummification changing food waste, thermal loss device little, safe, that control easily of being applicable to, be necessary.Kitchen garbage drying device proposed by the invention and method, not only can be effectively mummification changing food waste apace, and can kill harmful bacterium and pathogenic bacteria in the changing food waste simultaneously, guarantee the health of changing food waste, safety, harmless.
Summary of the invention
The key issue that the present invention will solve is at the deficiencies in the prior art, thereby a kind of changing food waste desiccation apparatus and method thereof efficiently are provided.
The desiccation apparatus of changing food waste of the present invention mainly comprises with the lower part and forming: mainly comprise importing swivel joint (1), ingress pipe (2), hollow disk (3), conduit (4), charging aperture (5), blast pipe (6), inspection socket (7), housing (8), scraper plate (9), stirring vane (10), coil pipe (11), hollow shaft (12), derivation swivel joint (13), delivery line (14), discharging opening (15) and supporting seat (16).Wherein, (1), (2), (3), (4), (5), (6), (7), (8), (9), (10), (11), (12), (13), (14), (15) all are arranged on the supporting seat (16).
This device comprises the circular cylindrical shell (8) that is fixed on the supporting seat (16), and the housing upper front end has charging aperture (5) and rear end lower discharging opening (15), and scraper plate (9) is housed on the inner walls; The circular cylindrical shell shaft core position has hollow shaft (12), its front end is equipped with high temperature heat conducting medium ingress pipe (2), heat-conducting medium enters in the hollow axocoel through importing swivel joint (1) by ingress pipe (2), and is entered in the hollow disk (3) and coil pipe (11) cavity that is fixed on the hollow shaft by the conduit (4) that is arranged on the hollow shaft; Delivery line (14) is connected by deriving swivel joint (13) with hollow shaft; Hollow shaft upper edge feedstock direction arrange hollow disk and coil pipe; Stirring vane (10) is housed on it; Hollow shaft is under the transmission of motor, and changing food waste enters discharging opening (15); Heat-conducting medium heat release in the cavity of hollow shaft, hollow disk and coil pipe is after derive swivel joint and discharged by delivery line; Blast pipe (6) is housed on the outer wall of circular cylindrical shell top side; Inspection socket (7) is equipped with in the middle part of housing; Housing has lagging casing outward, and the intermediate course that shell and housing outer wall form is connected with heat-conducting medium, and lagging casing is wrapped up fully by mineral wool.
In this device, importing swivel joint (1) is to be used for importing high temperature heat conducting medium to hollow axocoel; Ingress pipe (2) is to be used for transmitting high temperature heat conducting medium to hollow shaft by importing swivel joint; Charging aperture (5) is to be used for making pending changing food waste to enter this device; Blast pipe (6) is to be used for that the waste gas that the kitchen garbage drying process produces is discharged this device to enter in the follow-up exhaust treatment system; Inspection socket (7) is to be used for checking when this device is shut down; The housing (8) of band lagging casing is to be used for this device sealing insulation, guarantees carrying out smoothly of mummification; Scraper plate (9) and stirring vane (10) are transmission and the stirrings that is used for changing food waste; Hollow disk (3) is to be used to increase heat transfer area, and the indirect changing food waste reaches mummification sterilization purpose; Coil pipe (11) is to be used for further mummification changing food waste, and accelerates mummification speed; Hollow shaft (12) is to be used for high temperature heat conducting medium is imported hollow disk and coil pipe cavity by conduit (4); Deriving swivel joint (13) and delivery line (14) is to be used to derive the heat-conducting medium after the heat release in hollow shaft, hollow disk and the coil pipe cavity; Discharging opening (15) is to be used for the changing food waste after the mummification is delivered to transmission device, enters aftertreatment device; Supporting seat (16) is to be used for supporting, fixing this device each several part.
Scraper plate (9) described in this device is fixed on this device inwall, can prevent that changing food waste and hollow disk from rotating simultaneously, increases heat transference efficiency, prevents to pile up, and improves mixing efficiency.
Hollow shaft (10) described in this device, an end connects with importing swivel joint (1), and the other end connects with derivation swivel joint (13), is fixed with sprocket wheel on hollow shaft, it is connected with motor obtain power, makes hollow shaft rotate.
Hollow shaft described in this device imports swivel joint (1) and derives swivel joint (13), can 360 ° of rotations.
The end that conduit described in this device (4) is communicated with hollow axocoel is higher than the hollow shaft inwall, an end that is communicated with hollow disk is concordant with the hollow shaft outer wall, make that the heat-conducting medium after the heat release can not be back in hollow disk and the coil pipe in the hollow shaft, guaranteed that the heat-conducting medium after the heat release discharged by delivery line (14) fully.
Discharging opening described in this device (15) is located downflow weir can be set, and is used to change load and discharging time, guarantees effective mummification of changing food waste.
The scraper plate (9) at 30 °～60 ° of inclination angles is housed on the inner walls of this device.
The stirring vane (10) at 30 °～120 ° of inclination angles is housed on the disk in this device.
Hollow shaft in this device rotates with 5～30 rev/mins speed under the transmission of motor, and changing food waste at the uniform velocity enters discharging opening (15) with 5～10 meters/hour.
The circular cylindrical shell and the scraper plate of this device are made by stainless steel.Hollow shaft, hollow disk, coil pipe and stirring vane are also made by stainless steel.
The drying method of changing food waste of the present invention is achieved by the following scheme: changing food waste is delivered to carried out mummification in the above-mentioned kitchen garbage drying device.The drying method of changing food waste is: changing food waste is entered circular cylindrical shell by charging aperture, and under the stirring vane synergy of the hollow disk of scraper plate on the inner walls and rotation and coil pipe Zhou Duan, the changing food waste in the stirring and evenly mixing housing; Changing food waste constantly contacts with coil pipe with hollow shaft, hollow disk; High temperature heat conducting medium enters hollow shaft by ingress pipe, is connected with importing swivel joint between hollow shaft and the ingress pipe; High temperature heat conducting medium in the hollow shaft is dispersed in hollow disk and the coil pipe by conduit; The changing food waste that the chamber wall of high temperature heat conducting medium heat by hollow axial wall and hollow disk and coil pipe passes in the housing carries out indirect; Changing food waste stopped in feed bin 20～60 minutes, with rotatablely moving of hollow shaft, hollow disk and coil pipe, made changing food waste evenly to the motion of discharging opening direction by scraper plate and stirring vane, discharged through discharging opening.
The waste gas that changing food waste produces in drying process enters in the follow-up exhaust treatment system through blast pipe, and gas pressure remains under the negative pressure state of 30～50Pa in the housing.Scraper plate on the inner walls can strike off the changing food waste that coheres on hollow disk and coil pipe; Stirring vane on hollow disk and the coil pipe can strike off the changing food waste that coheres on the feed bin inwall.
The changing food waste that contains large quantity of moisture enters from charging aperture, mummification under the hollow disk of high temperature and the effect of coil pipe indirect, and temperature is controlled between 90 ℃～120 ℃ during indirect, makes the unlikely zoom of changing food waste rotten.75%～85% of the preceding water accounts rubbish total amount of mummification, the changing food waste moisture content is lower than 13% after the mummification.Kill harmful bacterium and pathogenic bacteria in the changing food waste simultaneously, guarantee the health of changing food waste, safety, harmless.The high temperature waste hot gas that comes out by emission by exhaust pipe can be used to the waste water heating etc., and the waste gas of collecting by pipeline is easier to be collected into and carries out subsequent treatment in the purifier simultaneously.
The present invention has tested use, and this device disposal ability is big, can reach 5～10t/h.Practice shows that this technology not only makes changing food waste obtain drying and other treatment fast and effectively, and the changing food waste of mummification is fully used as resource, when obtaining remarkable social benefit, has also obtained tangible economic benefit.
Description of drawings
Fig. 1 is the kitchen garbage drying device floor map
Among the figure, import swivel joint (1), ingress pipe (2), hollow disk (3), conduit (4), charging aperture (5), blast pipe (6), inspection socket (7), housing (8), scraper plate (9), stirring vane (10), coil pipe (11), hollow shaft (12), derive swivel joint (13), delivery line (14), discharging opening (15) and supporting seat (16) composition.
The specific embodiment
Embodiment 1
This device comprises the circular cylindrical shell (8) that is fixed on the supporting seat (16), and the housing upper front end has charging aperture (5) and rear end lower that discharging opening (15) is arranged, and the scraper plate (9) at 30～60 ° of inclination angles is housed on the inner walls; The circular cylindrical shell shaft core position has hollow shaft (12), its front end is equipped with high temperature heat conducting medium ingress pipe (2), heat-conducting medium enters in the hollow axocoel through importing swivel joint (1) by ingress pipe, and enters in the cavity of the hollow disk (3) that is fixed on the hollow shaft and coil pipe (11) by being arranged in conduit (4) on the hollow shaft; Delivery line (14) and hollow shaft are connected by derivation swivel joint that can 360 ° of rotations; Hollow shaft upper edge feedstock direction is equipped with hollow disk and coil pipe; The stirring vane (10) that 30 °～120 ° of inclination angles are arranged on hollow disk and the coil pipe; Hollow shaft rotates with 5～30 rev/mins speed under the transmission of motor, and changing food waste at the uniform velocity enters discharging opening (15) with 5～10 meters/hour; Heat-conducting medium heat release in the cavity of hollow shaft, hollow disk and coil pipe is after derive swivel joint (13) and discharged by delivery line (14); Be equipped with on the outer wall of circular cylindrical shell rear end
20～80mm blast pipe (6); 1000 * 800mm inspection socket (7) is equipped with in the middle part of feed bin; Housing has lagging casing outward; The intermediate course that lagging casing and housing outer wall form is connected with heat-conducting medium, and lagging casing is wrapped up fully by the mineral wool of 50～100mm.See accompanying drawing.
The drying method of changing food waste: high temperature heat conducting medium enters in the hollow axocoel through importing swivel joint by ingress pipe, and enter in the hollow disk and coil pipe cavity that is fixed on the hollow shaft by the conduit that is arranged on the hollow shaft, make in the cavity of hollow shaft, hollow disk and coil pipe to be full of high temperature heat conducting medium, and thermally equivalent.Hollow shaft connects motor and obtains power and rotate therefore also rotation thereupon of hollow disk and coil pipe.The changing food waste that contain large quantity of moisture this moment is entered in this device by charging aperture, and the indirect effect that is subjected to hollow shaft, hollow disk and coil pipe makes kitchen garbage drying, and the while, the harmful bacterium and the pathogenic bacteria of changing food waste were killed by high temperature in heating process.On hollow disk and coil pipe, be provided with stirring vane, on the device inwall, be provided with scraper plate, make changing food waste to make the effective mummification of changing food waste simultaneously effectively to the motion of discharging opening direction.The waste gas that produces during the mummification changing food waste gathers after blast pipe enters in the follow-up exhaust treatment system at the device upper space.Heat-conducting medium in the cavity of hollow shaft, hollow disk and coil pipe after the heat release is discharged by delivery line through deriving swivel joint.Changing food waste after the mummification enters transmission device by the discharging opening discharge and is delivered in the aftertreatment device.The 75%-85% of changing food waste water accounts rubbish total amount before mummification, the changing food waste moisture content is lower than 13% after mummification.
Claims (12)
1, a kind of desiccation apparatus of changing food waste, it is characterized in that: this device comprises the cylindrical shape desiccation apparatus housing (8) that is fixed on the supporting seat (16), desiccation apparatus housing upper front end has charging aperture (5) and rear end lower discharging opening (15), the desiccation apparatus housing is made of metal sandwich, interlayer inside can feed steam, hot water, heat conduction wet goods heat-conducting medium, and scraper plate (9) is housed on the inner walls; The desiccation apparatus inside center is provided with hollow shaft (12), and hollow shaft upper edge feedstock direction successively is equipped with hollow disk and coil pipe; Its front end is equipped with heat-conducting medium ingress pipe (2), heat-conducting medium enters in the hollow axocoel through importing swivel joint (1) by ingress pipe (2), and enters in the cavity of the hollow disk (3) that is fixed on the hollow shaft and coil pipe (11) by being arranged in conduit (4) on the hollow shaft; Delivery line (14) is connected by deriving swivel joint (13) with hollow shaft; Stirring vane (10) is housed on hollow disk and the coil pipe; Hollow shaft by the impetus of stirring vane on hollow disk and the coil pipe and inner walls upper scraping plate, is discharged changing food waste under the driving of motor by discharging opening (15); In the cavity of hollow shaft, hollow disk and coil pipe, heat-conducting medium is discharged by delivery line (14) through deriving swivel joint; The side on desiccation apparatus housing top is equipped with blast pipe (6); Inspection socket (7) is equipped with in the middle part of housing; Lagging casing is arranged outside the housing (8), and the intermediate course that shell and housing (8) form is connected with heat-conducting medium, and lagging casing is wrapped up fully by mineral wool.
2, kitchen garbage drying device according to claim 1, it is characterized in that: hollow shaft rotates in housing, pass through hollow shaft, steam, hot water, heat conduction wet goods heat-conducting medium are imported in hollow disk and the coil pipe as drying medium, the housing that has lagging casing simultaneously also feeds steam, hot water, heat conduction wet goods heat-conducting medium, increase the heat exchange area of desiccation apparatus, housing top has dry gas sampling space; Waste gas gathers the back and is discharged by blast pipe.
3, kitchen garbage drying device according to claim 1 is characterized in that: the scraper plate on the inner walls is used for fully stirring dried material; The setting angle of stirring vane is 30～120 ° on hollow disk and the coil pipe.
4, kitchen garbage drying device according to claim 1 is characterized in that: the hollow shaft two ends are connected thermal medium respectively into and out of pipeline to import swivel joint with the derivation swivel joint.
5, the device of kitchen garbage drying according to claim 1 is characterized in that: hollow shaft rotates with 2.5～25 rev/mins speed under the transmission of motor, and changing food waste at the uniform velocity enters discharging opening with 5～10 meters/hour.
6, the device of kitchen garbage drying according to claim 1 is characterized in that: the desiccation apparatus discharging opening is equipped with adjustable downflow weir, regulates residence time of material by the height of regulating downflow weir.
7, the device of kitchen garbage drying according to claim 1 is characterized in that: feed high temperature heat conducting medium by the conduit of arranging on the hollow shaft in hollow disk and coil pipe, collected by special pipeline after the heat release and discharged by delivery line.
8, a kind of method of kitchen garbage drying is characterized in that using each described kitchen garbage drying device among the claim 1-7.
9, method according to claim 8 is characterized in that: changing food waste is entered in the desiccation apparatus housing by charging aperture, material was held under the stirring vane synergy at the hollow disk and the coil pipe of inner walls scraper plate and rotation last week, fully stir; Because the heat exchange action of heat-conducting medium makes hollow disk, coil pipe and inner walls thermally equivalent, temperature remains on 90 ℃～120 ℃, and material is dried rapidly, and can not make the material zoom rotten; According to the degree of drying of material, adjust the angle of stirring vane on hollow disk and the coil pipe simultaneously, material is moved forward or backward, guarantee that the time of staying of material reaches 20 minutes to 60 minutes at pilot process; At last, the changing food waste of mummification reaches suitable moisture content, discharges by discharging opening.
10, the method for kitchen garbage drying according to claim 8 is characterized in that: the 75%-85% of water accounts rubbish total amount before the described changing food waste, mummification, the changing food waste moisture content is lower than 13% after the mummification.
11, the method for kitchen garbage drying according to claim 8 is characterized in that: the waste gas that produces in the changing food waste heating process enters in the follow-up exhaust treatment system through blast pipe, and the desiccation apparatus inner space remains on the negative pressure of 30～50Pa.
12, the method for kitchen garbage drying according to claim 8 is characterized in that: the scraper plate on the desiccation apparatus inwall can strike off the changing food waste that coheres on hollow disk and coil pipe and changing food waste is fully stirred; Stirring vane on hollow disk and the coil pipe can strike off the changing food waste that coheres on the feed bin inwall and promote moving of changing food waste.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007103060076A CN100483056C (en) | 2007-12-28 | 2007-12-28 | Kitchen garbage drying device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007103060076A CN100483056C (en) | 2007-12-28 | 2007-12-28 | Kitchen garbage drying device and method |
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| CN101216242A CN101216242A (en) | 2008-07-09 |
| CN100483056C true CN100483056C (en) | 2009-04-29 |
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| CNB2007103060076A Active CN100483056C (en) | 2007-12-28 | 2007-12-28 | Kitchen garbage drying device and method |
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