EP0417288B1 - Appareil de sechage et de combustion de matieres inflammables solides a haute teneur en humidite - Google Patents

Appareil de sechage et de combustion de matieres inflammables solides a haute teneur en humidite Download PDF

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Publication number
EP0417288B1
EP0417288B1 EP89911098A EP89911098A EP0417288B1 EP 0417288 B1 EP0417288 B1 EP 0417288B1 EP 89911098 A EP89911098 A EP 89911098A EP 89911098 A EP89911098 A EP 89911098A EP 0417288 B1 EP0417288 B1 EP 0417288B1
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EP
European Patent Office
Prior art keywords
gas
furnace
drier
solid
air
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP89911098A
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German (de)
English (en)
Other versions
EP0417288A4 (en
EP0417288A1 (fr
Inventor
Takashi 10-30 Wakabayashi Kikuchi
Shoji 105-1 Aza-Shinkawamukai Sakurai
Ikurou 2-16 Nishitaga 3-Chome Shisido
Touru 8-8 Kongou-Zawa Taihaku-Ku Yoshida
Hideo 6-5 Honcho Seki
Shinya 14-28 Kaigamori 3-Chome Aoba-Ku Watanabe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MIYAGI KEN
Takahashi Syokuhin Kogyo KK
Kameyama Tekkosho KK
Original Assignee
Takahashi Syokuhin Kogyo KK
Kameyama Tekkosho KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Takahashi Syokuhin Kogyo KK, Kameyama Tekkosho KK filed Critical Takahashi Syokuhin Kogyo KK
Priority to AT89911098T priority Critical patent/ATE107404T1/de
Publication of EP0417288A1 publication Critical patent/EP0417288A1/fr
Publication of EP0417288A4 publication Critical patent/EP0417288A4/en
Application granted granted Critical
Publication of EP0417288B1 publication Critical patent/EP0417288B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
    • F23G5/04—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment drying
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
    • F23G5/033—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment comminuting or crushing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/44—Details; Accessories
    • F23G5/46—Recuperation of heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/001—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for sludges or waste products from water treatment installations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/04—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste liquors, e.g. sulfite liquors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00—Heating arrangements
    • F26B23/02—Heating arrangements using combustion heating
    • F26B23/028—Heating arrangements using combustion heating using solid fuel; burning the dried product
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2206/00—Waste heat recuperation
    • F23G2206/10—Waste heat recuperation reintroducing the heat in the same process, e.g. for predrying

Definitions

  • the present invention relates to an apparatus for drying and burning high-hydrous combustible solids or wet wastes, and more particularly to an improvement in or relating to a drying and burning system in which high-hydrous combustible solids such as bean-curd refuse, are put in and dried in an associated drier; the dried solids are brought and burnt in an associated furnace; and the hot waste gas is fed from the furnace to the drier to dry the wet waste.
  • high-hydrous combustible solids such as bean-curd refuse
  • high-hydrous combustible solids or wet wastes such as bean-curd refuse, sewage or raw sewage are treated by dewatering, drying and burning. Specifically, wet waste is subjected to these treatments sequentially in a dehydrator, drier and furnace. These equipments were separate or independent from each other, not making up a composite or integrated system. In an attempt to meet energy-saving demand or reduce public nuisance the drier and furnace were combined to provide an integrated system.
  • the hot waste gas which is produced when drying the wet waste in the drier is fed to the furnace to be burnt and deodorized.
  • a part of so deodorized gas is fed to the drier, and is used as drying gas.
  • This system constitutes a closed deodorizing system, and is advantageous from the energy saving point of view.
  • the conventional system dries the wet waste in its drier, and burns the odor gas in its furnace for the sake of deodorizing rather than burning. Therefore, the conventional system requires another furnace for burning the deodorized material to ash. Accordingly, the whole size disadvantageously increases.
  • the deodorizing furnace cannot be used to burn the dried waste because it is connected to the drier by a pipe whose size is large enough to allow the odor gas to pass to the furnace, preventing the dried waste from passing to the furnace.
  • JP-A-60-221613 It is known from JP-A-60-221613 to provide apparatus for drying and burning up high-hydrous combustible solids comprising: a hopper for receiving said high-hydrous combustible solids; a drier for drying said high-hydrous combustible solids with a heating gas circulating therein for forming dried combustible solids of low water content; a feeding means for feeding the dried combustible solids from said drier; a furnace connected to an end of said feeding means for receiving said dried combustible solids fed from said drier and for burning said dried combustible solids; and a combustion gas feedback passage disposed between said furnace and said drier for feeding back high temperature combustion exhaust gas from said furnace into said drier to be used as said heating gas.
  • this document fails to teach any means for dealing with the offensive odor which is generated in the hopper.
  • the present invention is characterised in that air inlet means is incorporated in said hopper for introducing fresh air into said hopper for forming a mixture of a gas generated from said high hydrous combustible solids and air within said hopper, and in that a duct and a blower are provided for supplying the mixture as a carrier gas for said dried combustible solids to a solid-gas separator provided in said feeding means between said drier and said furnace.
  • a cylindrical drier is indicated at 1, and this drier has a gas supplying vent 2 at its lower part; a dried waste exhaust opening 3 at its upper part; and a wet waste inlet opening 4 at a somewhat higher level than the intermediate level of the cylinder. These openings and vent are arranged longitudinally.
  • Cylindrical drier 1 has a rotating shaft 5 along its longitudinal central axis, and electric motor 6 is used to rotate shaft 5.
  • Perforated distribution plate 7 is laid adjacent to gas vent 2 at the bottom level of cylindrical drier 1 for distributing hot air.
  • Screw 9 is fixed to rotating shaft 5 above perforated distribution plate 7. Screw 9 is adapted to be rotated by shaft 5.
  • Blade 10 is provided at a higher level than screw 9. The screw 9 and blade 10 are arranged in such positions that dried waste may be brought upward by screw 9, and then may be made to fly by spiral wind motion, which is caused by blade 10.
  • An obstacle plate 11 is fixed to rotating shaft 5 at a higher level than blade 10. Obstacle plate 11 has small apertures 12 and pins 13 on its opposite surfaces. There is an annular gap between the circumference 16 of obstacle plate 11 and inside surface 17 of cylindrical drier 1. The gap is broad enough to allow pieces of dried waste solid to pass therethrough. Circular wind motion zone 18 is defined between obstacle plate 11 and blade 10.
  • Inlet 4 for pieces of wet waste opens at the second circular wind motion zone 18, in which fracturing cross blade 14 having fracturing pins 15, is fixed to rotating shaft 5.
  • a hopper for containing wet waste is indicated at 20.
  • Hopper 20 communicates with inlet 4 of drier 1 via screw conveyer 21.
  • Exit 3 for discharging fragments of dried waste solid communicates with furnace 23 via transportation conduit 22. More specifically, exit 3 communicates with the circular wind motion zone 25 of burner 24 in furnace 23 via transportation conduit 22.
  • a solid-gas separator 26 is situated in transportation conduit 22. Specifically, solid-gas separator 26 has transportation conduit 22 at its upper level, and ejector 27 at its lower level. Ejector 27 is connected on its primary side to gas chamber 29, which is provided to side wall 28 of solid-gas separator 26, and ejector 27 is connected on its secondary side to the circular wind motion zone 25 of furnace 23.
  • Exhaust duct 31 extends from the upper part of the separating space 30 to the funnel-shaped solid-gas separator 26, thus permitting ejection of the gas from solid-gas separator 26 through cyclone 32, drawing fan 33 and exhaust duct 34. Dust box 35 is attached to the bottom of cyclone 32.
  • Hopper 20 is designed to contain high-hydrous combustible solids or wet waste such as bean-curd refuse, and it has inlet 35' for wet waste on its ceiling, and air inlet 36 on its side.
  • An outlet 37 of hopper 20 is connected to inlet 40 of solid-gas separator 26 via air duct 39, which has a blower 38.
  • Wastegas outlet 41 of furnace 23 is connected to gas inlet 2 of drier 1 by wastegas return tube 42.
  • Air duct 39 has a secondary air inlet tube 44 extending therefrom in the form of branch 43 downstream of blower 38, and connected to secondary air nozzle 45, which opens in combustion chamber 53.
  • This combustion chamber 53 has a steam jacket 46 surrounding therearound, and water supply tank 48 having water softener 47 associated therewith, is connected to steam jacket 46 by water supply tube 49.
  • the steam generated by steam jacket 46 may be used in producing related products.
  • Wasteoil tank 51 is connected to burner 24 by wasteoil supply pipe 52.
  • High-hydrous combustible solids or wet wastes such as bean-curd refuse are put in hopper 20 from its inlet 35'. Then, wet waste is transported to inlet 4 of drier 1 by screw conveyor 21, and bulks of wet waste are thrown in drier 1 where they are broken into fragments by pins 15 of fracturing blade 14. The fragments of wet waste fall downward. In the course of descent by gravity the fragments of wet waste are struck and sprung upwards by rotating blade 10 on the second stage. While this takes place, the fragments of wet waste are brought in counter contact with rising flow of hot gas, thereby expediting the drying of wet waste. At the outset the fragments of wet waste have relatively high water content, and therefore they are relatively heavy.
  • Rotating obstacle plate 11 has pins 13 thereon, and falling fragments are struck and sprung as indicated by arrow B in Fig. 2 so that they are struck against the inside surface 17 of drier 1, and they fall down along the inside surface 17 of drier 1 in the annular space between the circumference 16 of rotating blade 11 and the inside surface 17 of drier 1.
  • fragments of waste are in contact with hot wind, and accordingly they are being dried all the time.
  • rotating screw 9 gas supply inlet 2 and the apertures of distribution plate 7 cannot be blocked with fragments.
  • fragments of waste are transferred to rotating blade 10, and as indicated by arrow F in Fig. 2, again they are sprung up by rotating blade 10. Then, smaller fragments of waste are carried upwards by circular wind motion, which is caused by rotating blade 10. During the process described so far fragment size is reduced gradually, and accordingly the proportionate surface area of each fragment increases, thus increasing the efficiency with which fragments of waste are brought in contact with gas. Also, as indicated by arrow G, fragments of waste are struck and sprung against the inner surface 17 of drier 1 by pins 13 on the lower surface of obstacle plate 11. Again, fragments of waste are broken and reduced in size. Then, they fall down along the inner surface 17 of drier 1.
  • pieces of wet waste material are brought by circular wind motion in zone 18 as indicated by arrows C-D-E-F-G-C until they are broken to small fragments, accordingly increasing the proportionate surface area of each fragment and expediting the drying of wet waste.
  • Particles of dried solid are carried by hot wind which blows upwards from the apertures 12 of obstacle plate 11.
  • particles of dried solid are subjected to the same treatment in circular wind motion zone 18 at the second stage, where solid particles are reduced in size, and dried even more. In this second stage the temperature of heated gas lowers somewhat, and the heated gas comes to contain water. Therefore, heat and water will be deprived with an extremely high efficiency.
  • Dried particles are struck and strung by final blade 10, and are carried away by hot air, leaving exhaust outlet 3.
  • blower 38 When blower 38 is driven, air is supplied to the solid-gas separating space 40 of solid-gas separator 26 via outlet 37 of hopper 20 and air duct 39, thus collecting the odor from the inside of hopper 20.
  • the supplying of air to solid-gas separator permits separation of dried particles into solid and gas, and solid particles are reduced in size.
  • the gas is discharged through air duct 31, cyclone 32 and exhaust duct 34.
  • a part of supplied air is led to ejector 27 via air chamber 29, and pulverized solid is drawn and brought to circular wind motion zone 25 of furnace 23, where it is burnt by burner 24.
  • the pulverized solid can be burnt well because of its minute particle size.
  • This combustion is effected by using the air which carries the pulverized solid.
  • the combustion uses the secondary air which is drawn into combustion chamber 53 through secondary air supply conduit 44 branching downstream of blower 38.
  • Dried particles are burnt there, and the waste gas flows back to gas inlet 2 of drier 1 via gas return pipe 42 to be used in the drying process.
  • the wet waste is dried in drier 1, and then the dried solid is brought to furnace 23, where it is burnt.
  • furnace 23 This permits reduction of the size of the wet waste disposing system.
  • the waste gas from furnace 23 is made to return to drier 1 to be used as drying gas, and accordingly energy is saved.
  • a single blower 38 is used to effect transportation of waste solid from drier 1 to furnace 23, reduction of dried waste solid in size, supply of air for combustion and collection of the odor from the wet waste in hopper 20.

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

Abstract

La présente invention se rapporte à un appareil de séchage et de combustion de matières inflammables solides à haute teneur en humidité, qui comprend une trémie (20) servant à stocker les matières inflammables solides à haute teneur en humidité, un séchoir (1) servant à sécher les matières inflammables solides à haute teneur en humidité chargées à partir de la trémie (20) ainsi qu'un incinérateur (23) servant à recevoir les matières solides séchées par le séchoir (1) à travers un conduit de transfert (22) et à les brûler, et qui permet d'introduire les gaz d'échappement provenant de l'incinérateur (23) dans le séchoir (1) et de les utiliser comme gaz de séchage. Après que les matières inflammables solides à haute teneur en humidité aient été séchées par le séchoir (1), elles sont immédiatement transférées et brûlées dans l'incinérateur (23). Les gaz d'échappement provenant de l'incinérateur (23) sont utilisés comme gaz de séchage par le séchoir (1).

Claims (5)

  1. Appareil pour le séchage et la combustion de matières solides inflammables à haute teneur en humidité qui comprend : une trémie (20) pour la réception desdites matières solides inflammables à haute teneur en humidité; un sécheur (1) pour le séchage desdites matières solides inflammables à haute teneur en humidité par un gaz de chauffage circulant à l'intérieur pour former des matières solides inflammables séchées à faible teneur en eau ; un moyen d'alimentation (22) pour introduire les matières solides inflammables séchées en provenance dudit sécheur ; un four (23) connecté à une extrémité dudit moyen d'alimentation (22) pour la réception desdites matières solides inflammables séchées introduites en provenance dudit sécheur et pour la combustion desdites matières solides inflammables séchées ; et un passage de type boucle à rétroaction de gaz de combustion (42) placé entre ledit four (23) et ledit sécheur (1) pour la réintroduction du gaz de sortie de combustion à haute température en provenance dudit four (23) dans ledit sécheur (1) lequel sera utilisé comme ledit gaz de chauffage ;
       caractérisé en ce qu'un moyen d'entrée d'air (36) est incorporé dans ladite trémie pour introduire de l'air frais à l'intérieur de ladite trémie (20), pour former un mélange d'un gaz produit à partir desdites matières solides inflammables à haute teneur en humidité et d'air à l'intérieur de ladite trémie (20), et en ce qu'une canalisation (39) et une soufflerie (38) permettent d'acheminer le mélange comme un gaz porteur pour lesdites matières solides inflammables séchées dans un séparateur gaz-solide (26) inclus dans ledit moyen d'alimentation (22) entre ledit sécheur (1) et ledit four (23).
  2. Appareil selon la revendication 1, dans lequel un éjecteur (27) est placé en bas dudit séparateur gaz-solide (26), dans lequel éjecteur (27) le mélange de gaz et d'air peut passer, utilisant l'effet de l'éjecteur pour transporter le solide séparé vers ledit four (23) et utilisant l'air transportant le solide séparé comme air de combustion dans ledit four (23).
  3. Appareil selon la revendication 1 ou 2, dans lequel un tuyau de sortie (31), un cyclone (32) et une canalisation de sortie (34) sont connectés audit séparateur gaz-solide (26).
  4. Appareil selon la revendication 1, 2 ou 3, dans lequel ladite canalisation d'air (39) est divisée en deux branches en aval de ladite soufflerie (38), une branche étant connectée audit séparateur gaz-solide (26) et l'autre branche étant connectée audit four (23) pour fournir de l'air secondaire.
  5. Appareil selon l'une quelconque des revendications précédentes, dans lequel ledit four (23) possède une chemise à vapeur (46) autour de sa chambre de combustion (53), la vapeur produite par ladite chemise à vapeur (46) étant utilisée dans la production d'un produit.
EP89911098A 1989-03-30 1989-10-04 Appareil de sechage et de combustion de matieres inflammables solides a haute teneur en humidite Expired - Lifetime EP0417288B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89911098T ATE107404T1 (de) 1989-10-04 1989-10-04 Trocknungs- und verbrennungsvorrichtung für feste entflammbare materialien mit hoher feuchtigkeit.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP7933989 1989-03-30
PCT/JP1989/001023 WO1990012250A1 (fr) 1989-03-30 1989-10-04 Appareil de sechage et de combustion de matieres inflammables solides a haute teneur en humidite

Publications (3)

Publication Number Publication Date
EP0417288A1 EP0417288A1 (fr) 1991-03-20
EP0417288A4 EP0417288A4 (en) 1992-04-01
EP0417288B1 true EP0417288B1 (fr) 1994-06-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP89911098A Expired - Lifetime EP0417288B1 (fr) 1989-03-30 1989-10-04 Appareil de sechage et de combustion de matieres inflammables solides a haute teneur en humidite

Country Status (4)

Country Link
EP (1) EP0417288B1 (fr)
KR (1) KR940010659B1 (fr)
DE (1) DE68916245T2 (fr)
WO (1) WO1990012250A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0692679A3 (fr) * 1994-07-13 1997-01-02 Kloeckner Humboldt Deutz Ag Procédé et schéma d'installation pour le séchage et l'incinération de boues d'égout
FR2738169B1 (fr) * 1995-08-29 1997-10-17 Couturier Jean Procede pour la valorisation et la reutilisation des cendres volantes des centrales thermiques fonctionnant au charbon
AT406509B (de) * 1996-01-18 2000-06-26 Andritz Patentverwaltung Verfahren und anlage zur trocknung von schlamm, insbesondere klärschlamm
CN211314321U (zh) * 2019-09-30 2020-08-21 潍柴动力股份有限公司 尾气降温除水装置及sofc汽车

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE419974C (sv) * 1978-10-10 1984-04-02 Modo Chemetics Ab Forfarande for torkning och brenning av vattenhaltiga fasta brenslen
JPS6014257B2 (ja) * 1979-05-16 1985-04-12 日本フア−ネス工業株式会社 下水汚泥処理用不完全燃焼炉
JPS60221613A (ja) * 1984-04-18 1985-11-06 Kawasaki Heavy Ind Ltd 脱水汚泥の焼却方法
JPS6467300A (en) * 1987-09-08 1989-03-13 Toshiba Corp Combustion dryer

Also Published As

Publication number Publication date
KR920700378A (ko) 1992-02-19
DE68916245T2 (de) 1995-01-19
EP0417288A4 (en) 1992-04-01
EP0417288A1 (fr) 1991-03-20
WO1990012250A1 (fr) 1990-10-18
KR940010659B1 (ko) 1994-10-24
DE68916245D1 (de) 1994-07-21

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