AU549246B2 - Fluidised bed dryer - Google Patents
Fluidised bed dryerInfo
- Publication number
- AU549246B2 AU549246B2 AU82917/82A AU8291782A AU549246B2 AU 549246 B2 AU549246 B2 AU 549246B2 AU 82917/82 A AU82917/82 A AU 82917/82A AU 8291782 A AU8291782 A AU 8291782A AU 549246 B2 AU549246 B2 AU 549246B2
- Authority
- AU
- Australia
- Prior art keywords
- fluidized bed
- vapour
- heat exchanger
- application
- applicant
- 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.)
- Ceased
Links
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
- F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
- F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
- F26B3/08—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed
- F26B3/084—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed with heat exchange taking place in the fluidised bed, e.g. combined direct and indirect heat exchange
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Microbiology (AREA)
- Sustainable Development (AREA)
- Drying Of Solid Materials (AREA)
Description
lsIIIW 111 'Ll' 11. 2.2I LA 110m1 111112.0 .25 111111116 11111I
MICROCOPY RESOLUTION TESI CHART NATIONAL B3UREAU 1963A OF STANDARDS
I ~i.
'-4
C ~T FCE
CrWL~~ AiIL PNGVISIMtAL S?
7 8 291 7/82 APPLICATION FOR A STANDARD PATENT 1 S
<1 3 4(aW..~CJO E O~oj--
which Is described in the acothpanying,
For a Convention appItcation details of basic application(s)
i-LCEiVED For an application -made by virtue of section 51 Jy Original Application No. by
I request that the Patent may be granted as a Patent of Addition tOIthe Patent applied for on Application No. I t atent No the name of in I request that the term of the Patent of Addlition be the same as that for the main invention or so much of thie term of the patent for the mai ~~on8 My address for service
Da~dti rjjXU dyo
0atthis. IIACEX dyo .A
(Si ure)I
(To be completed where application is made by a person other than the applicant for, or thle patentee under. the patent for tne main invention.)
applicant for Application No hereby consent to this application. patentee of Patent No I
Dated this fdy
(Signature) THE COMMISSIONER OF PATENTS
mapo form Must bo amE. ompanoieI by either a provisional specification (Form 9 and true copy) of by a complete srneeification (Form YOand true copyi.
549246 1'nlM~fnNW~tAUT1 tir AlICTO&, 1A
Forms 7 and 8 AUSTRALIA
Patents Act 1952
Name(s) of In support of the application made y Applicant(s) WHITTAKERS LIMITE.and BRISTILE LTD. Title for a patent for an invention entitled DRYING OF PARTICULATE MATERIALS Name(s) and P/We', AriAxi Tk.,A-e RAe Ciffcj1. Vsr- c Wias L. address (es) of ie afrA rkc, -LA 6 Ar AdraliSA of person(s) Mic&Aa WA71 -G iiisa= making Ud solemdAeca nlyAa e. Pce goW Aaus declaration do solemnly and sincerely declare as fo llows:-
1. am/we are the applicant(s) for the patent, or am/are authorised by the abovementioned applicant to make this declaration on its behalf.
2. The basic application(s) as defined by Section 141 of the Act was/were made in the following country or countries on the following date(s) by the following applicant(s) namely:- Coutry, filing dat6 rnd name in_ on 19 of Aplficant(s) by for the or in_ on 19 each basic by appliqcation m
3. The said basic application(s) was/were the first application(s) made in a Convention country in respect of the invention the subject of the application. and 4. The actual inventor(s) of the said invention is/are address(es) HmTKKT MATTI KIPPO of. 13 Arundel Street, Kensington, of.te or Western Australia, 6151, AUSTRALIA. eah*actual
See reverse 5. The facts upon which the applicant(s) is/are entitled oidk- of this to make this application are as follows:- form'for the applicants are the assignees of the said actual g 1g^ace in Sinventor. dbmpd3eting this part
DECLARED at hPfPA 1 this l day of eCrOea 19
TYWY extR
Al v
This form may be completed and filed after the filing of a patent application but the form must not be signed until after it has been completely filled in as indicated by the marginal notes. The
Information for completing paragraph 5
A. If the application is by the actual inventor(s) it is not necessary to make.any insertion in paragraph
B. If the application is by a company or person to whom the invention has been assigned the appropriate insertion is "the applicant is the assignee of the actual inventor(s)"
C. If the application is by an employer entitled to the invention by service agreement(s) and a specific assignment has not been made the appropriate insertion is "the epplicant would be entitled to have assigned to it (him, her) a patent granted to the actual inventor (any of the actual inventors) in respect of the said invention."
D. Where Convention priority is claimed and the applicant in Australia is not the applicant in the Convention country, paragraph must indicate how the Australian applicant obtained the right to claim priority. For this purpose appropriate additional wording may be "(and) the applicant is the assignee of the applicant(s) named in paragraph 2 above" or "(and) the applicant has the consent of the applicant(s) named in.paragraph 2 above"
E. If the above information appears insufficient or inappropriate please defer completing the declaration form and discuss the matter with us. Remember that a declaration form may be completed and filed after lodgement of a patent application without any penalty or disadvantage. We do not need any signed form before filing an application.
(12) AUSTRALIAN PATENT ABRIDxtENT (19) AU (11) AU-B-82917/82
(54) FLUInISED BED DRYER (71) WHITTAKERS LIMITED BRISTILE LIMITED (21) 82917/82 549246 (22) 15.4.81 (23) 15.4.82 (24) 15.4.81 (43) 21.10.82 (44) 23.1.86 (51)3 F26B 3/08 F26B 17/10 (72) HISKI MATTI KIPPO (74) (56) 42971/78 529971 F26B 3/08, CO1L 9/08, BOIJ01 8/26 CIOB 57/10 32029/71 455054 07.96, 17.5, B01J, F26B 3/08, 11/16
(57) Claim 1. A process for drying particulate material contain- ing aqueous moisture comprising establishing a fluidized bed of material with superheated stea:,: as fluidizing medium, feeding material to be dried to the fluidized bed and removing dried material from the fluidized bed, compressing a portion of vapour issuing from the fluid- ized bed and passing the comprese'-d vapour through a condensor/heat exchanger located within the fluidized bed, the compressed vapour condensing in the condensor/ heat exchanger to give up its l&aent heat of vapour- isation to the fluidized bed, and ccndensate being discharged from the condensor/heat .xchanger, heating a further portion of vapour issuing f;rom the fluidized bed to a temperature in excess of the saturation temperature to form superheated steam and introducing the superheated steam to the fluidized bed and using the recycled superheated steam as fluidizing medium. 3. An apparatus for drying particulate material containing aqueous moisture comprising means for establishing a fluidized bed of the material utilizing superheated steam as the fluidizing medium, means for feeding particulate material to be dried into the
D1 AU 1 2
(11) AU-82917/82 -2- fluidized bed, means for removing dried particulate material from the fluidized bed, a compressor arranged to compress a portion of vapour issuing from the fluidized bed, a condensor/heat exchanger located in the fluidized bed and arranged to receive compressed vapour from the compressor, the condensor/heat exchanger having an outlet arranged for discharge of condensate from the condensor/heat exchanger, a heating means arranged to heat a further portion of vapour issuing from the fluidized bed to a temperature in excess of the saturation temperature to form superheated steam, and means for introducing the superheated steam to the fluidized bed for use as fluidizing medium.
116136/22
COMMONWEALTH OF AUSTRALIA Form is docmet cc~wmD PATENTS ACT 1952 *~m~nn mansdar cuim
00 COMPLETE SPECIFICATION (ORIGINAL)
Application Number: PE8482 Z Q1&Cass Int. Class Lodged: 15th April, 1981.
Complete Specification-Lodged: Accepted: 148* Published: Priority: 4
8
4*
Related Art:
4 4- TO BE COMPLETED BY APPLICANT Name of Applicant: HiISKI 111TTi Hippo. e
Wf4(T~r~rKr19, 8'
Address of Applicant: 13 Arufkdel Street, Kencington -1 ko4 irk the Stae of W e'e- Gemmenweelth fAta 17 4
*117 Actual Inventor: HISKI MATTI KIPPO. MUJR5SMPO iR1IKS ALTERED
Addres for Service: so A.C0, I~y.Auieetes,Pm-LO 4O v0IfNO cnP4Nqd 6en-As Weam 4 aou(ko PLAC,. *ert1 UW.A.
Complete Specification for the Invention entitled: "DRYING OF PARTICULATE MATERIALS". The following statemnent is a full desciiption of this invention, including the beot method of psafomln it known to m: r 1
THIS INVENTION relates to the drying of particulate materials. The present invention provides a fairly efficient system for drying particulate materials. In accordance with one aspect of the present invention there is provided a process for drying particulate material containing aqueous moisture comprising establishing a fluidized bed of material with super- heated steam as fluidizing medium, feeding material to 10 be dried to the fluidized bed and removing dried material from the fluidized bed, compressing a portion of vapour issuing from the fluidized bed and passing S* the compressed vapour through a condensor/heat exchan- ger located within the fluidized bed, the compressed vapour condensing in the condensor/heat exchanger to give up its latent heat of vapourisation to the fluidized bed, and condensate being discharged from the condensor/heat exchanger, heating a further portion of vapour issuing from the fluidized bed to a temperature in excess of the saturation temperature to form supherheated steam and introducing the superheated steam to the fluidized bed and using the recycled superheated steam as fluidizing medium. In accordance with a further aspect of the present 25 invention there is provided an apparatus for drying particulate material containing aqueous moisture comprising means for establishing a fluidized bed of the material utilizing superheated steam as the fluidizing medium, means for feeding particulate material to be dried into the fluidized bed, means for removing dried
2a
particulate material from the fluidized bed, a compressor arranged to compress a portion of vapour issuing from the fluidized bed, a ccndensor/heat exchanger located in the fluidized bed and arranged to receive compressed vapour from the compressor, the condensor/heat exchanger having an outlet arranged for discharge of condensate from the condensor/heat exchanger, a heating means arranged to heat a further portion of vapour issuing from the fluidized bed to a 10 temperature in excess of the saturation temperature to form superheated steam, and means for introducing the superheated steaa. to the fluidized bed for use as fluidizing medium. The present invention will now be described, by way of example, with reference to the accompanying drawing, which is a schematic drawing of a unit suitable for S.drying sawdust, wood shavings and wood chips. As shown in the drawing the fluidizing medium comprising steam laden air is fed into the plenum chamber 11 of a fluidizing chamber 12 by means of a fan 13 after passing through a heater 14. The heater 14 may be electric or any other suitable medium capable of heating the fluidizing medium to a temperature in excess of 1000 The material to be dried according to the embodinment comprises saw dust typically having a moisture content of the order of 50% by weight. The saw dust is fed by a feed mechanism 16 into the space of into the fluidizing chamber above a distributor plate 15 which separates the plenum chamber 11 from the fluidized bed. Dried sawdust is removed from the chamber through an outlet 18 located in the walls of the chamber above the fluidized bed.
Fluid from the fluidized medium is extracted from the top of the fluidizing chamber 12 by means of a pair of outlets 21 and 22. In order to extract entrained particles from the fluid escaping from the fluidized bed, a suitable dust extraction means is located at the top of the fluidizing chamber or alternatively in each of the outlets 21 and 22. Such dust extraction means may take the form of a cyclone. One of the outlets 21 is connected to the fan 13 whereby S* vapour from the fluidized bed is reheated and then rein- troduced into the plenum chamber 11. The other outlet 22 is connected to a compressor 20 whereby the vapour escaping from the fluidized medium is compressed. The outlet of the compressor is connected to a condenser/heat exchanger 19 in which the compressed vapor is caused to condense to give up its latent heat of vapourisation to the fluidized bed of sawdust. Condensate collecting in the heat exchanger is °discharged therefrom through an outlet 23 in the bottom thereof. Temperature produced in the heat exchanger by the heat of the compressed vapour passing through the heat exchanger together with the latent heat of vapouration, such that a temperature differential exists between the heat exchanger and the sawdust passing through the fluid- izing bed ensuring that the particles of saw dust are dried to a satisfactory moisture content (ie; of about during their passage through the fluidizing bed.
The production of steam as the fluidizing medium and the superheating of the steam may be effected by any suitable means. In one form it is proposed that the production of steam and possibly the superheating thereof may be effected using solar energy by any suitable form of concentrating collector.
It should be appreciated however that the scope of the present invention need not be restricted to the particular form of the invention described above.
*o a
o*
e
:e o
o,
04 *CC C
The ci 1. A ing aq bed of mediumi bed an compre ized b conden bed, t heat e isatic discha a f urt bed tc temper the su the re 2. A partic and /or 3. A contai est~ibI superb~ feedir fluidi materi to conr fluidi
NT0
The claims defiiing the invention are as follows:- 1. A process for drying particulate material contain- ing aqueous moisture comprising establishing a fluidized bed of material with superheated steam as fluidizing medium, feeding material to be dried to the fluidized bed and removing dried material from the fluidized bed, compressing a portion of vapour issuing from the fluid- ized bed and passing the compressed vapour through a condensor/heat exchanger located within the fluidized bed, the compressed vapour condensing in the condensor/ heat exchanger to give up its latent heat of vapour- isation to the fluidized bed, and condensate being discharged from the condensor/heat exchanger, heating a further portion of vapour issuing from the fluidized bed to a temperature in excess of the saturation temperature to form superheated steam and introducing the superheated steam to the fluidized bed and using the recycled superheated steam as fluidizing medium. 2. A process according to claim i, in which the particulate material is sawdust and/or wood shavings and/or wood chips. 3. An apparatus for drying particulate material containing aqueous moisture comprising means for establishing a fluidized bed of the material utilizing superheated steam as the fluidizing medium, means for feeding particulate material to be dried into the fluidized bed, means for removing dried particulate material from the fluidized bed, a compressor arranged to compress a portion of vapour issuing from the
I:a fluidized bed, a condensor/heat exchanger located in the
-V-1
4"BriB9Y1 S
6
fluidized bed and arranged to receive compressed vapour from the compressor, the condensor/heat exchanger having an outlet arranged for discharge of condensate from the condensor/heat exchanger, a heating means arranged to heat a further portion of vapour issuing from the fluidized bed to a temperature in excess of the saturation temperature to form superheated steam, and means for introducing the superheated steam to the fluidized bed for use as fluidizing medium. 10 4. A process for drying particulate material substan- .tially as hereinbefore described with reference to the accompanying drawing. An apparatus for drying particulate material substantially as hereinbefore described with reference to the accompanying drawing. DATED 11 SEPTEMBER 1985 WHITTAKERS LIMITED and BRISTILE LIMITED o By their Patent Attorneys KELVIN LORD AND COMPANY PERTH, WESTERN AUSTRALIA
4,
4
4aS
82 917/82
*422
204 12
*4 46
14 .13
*444-15
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU82917/82A AU549246B2 (en) | 1981-04-15 | 1981-04-15 | Fluidised bed dryer |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPE8482 | 1981-04-15 | ||
| AU82917/82A AU549246B2 (en) | 1981-04-15 | 1981-04-15 | Fluidised bed dryer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU8291782A AU8291782A (en) | 1982-10-21 |
| AU549246B2 true AU549246B2 (en) | 1986-01-23 |
Family
ID=3761067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU82917/82A Ceased AU549246B2 (en) | 1981-04-15 | 1981-04-15 | Fluidised bed dryer |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU549246B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2196756A1 (en) * | 2008-12-15 | 2010-06-16 | Siemens Aktiengesellschaft | Device for drying fuel |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CS273337B2 (en) * | 1986-12-31 | 1991-03-12 | Rheinische Braunkohlenw Ag | Method of damp loose materials drying in a drier with a whirling bed and equipment for carrying out this method |
| EP0307744A3 (en) * | 1987-09-14 | 1989-08-09 | Waagner-Biro Aktiengesellschaft | Fluidised-bed drying plant for bulk goods |
| FR2652153B1 (en) * | 1989-07-06 | 1995-01-27 | Francois Laurenty | METHOD AND TOWER FOR DRYING GRAIN PRODUCTS. |
-
1981
- 1981-04-15 AU AU82917/82A patent/AU549246B2/en not_active Ceased
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2196756A1 (en) * | 2008-12-15 | 2010-06-16 | Siemens Aktiengesellschaft | Device for drying fuel |
Also Published As
| Publication number | Publication date |
|---|---|
| AU8291782A (en) | 1982-10-21 |
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