CA1151864A - Process and apparatus for drying organic solid materials, particularly brown coals - Google Patents
Process and apparatus for drying organic solid materials, particularly brown coalsInfo
- Publication number
- CA1151864A CA1151864A CA000365787A CA365787A CA1151864A CA 1151864 A CA1151864 A CA 1151864A CA 000365787 A CA000365787 A CA 000365787A CA 365787 A CA365787 A CA 365787A CA 1151864 A CA1151864 A CA 1151864A
- Authority
- CA
- Canada
- Prior art keywords
- solid materials
- steam
- bunker
- drying
- heating
- 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
Links
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10F—DRYING OR WORKING-UP OF PEAT
- C10F5/00—Drying or de-watering peat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
- F26B17/12—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft
- F26B17/14—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft the materials moving through a counter-current of gas
- F26B17/1433—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft the materials moving through a counter-current of gas the drying enclosure, e.g. shaft, having internal members or bodies for guiding, mixing or agitating the material, e.g. imposing a zig-zag movement onto the material
- F26B17/1441—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft the materials moving through a counter-current of gas the drying enclosure, e.g. shaft, having internal members or bodies for guiding, mixing or agitating the material, e.g. imposing a zig-zag movement onto the material the members or bodies being stationary, e.g. fixed panels, baffles, grids, the position of which may be adjustable
- F26B17/1458—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft the materials moving through a counter-current of gas the drying enclosure, e.g. shaft, having internal members or bodies for guiding, mixing or agitating the material, e.g. imposing a zig-zag movement onto the material the members or bodies being stationary, e.g. fixed panels, baffles, grids, the position of which may be adjustable consisting of perforated panels or baffles; consisting of grids
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Drying Of Solid Materials (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
Abstract: Organic solid materials such as brown coals are dried by pre-ferably continously passing the pre-heated organic solid ma-terials through at least one drying stage and by subjecting the organic solid materials within this drying stage to the action of saturated steam under super atmospheric pressure and at elevated temperature. Steam is used for pre-heating the solid materials and the condensate formed is discharged prior to introducing the solid materials into the drying stage ope-rated with saturated steam. Saturated steam and preferably the steam obtained during the drying process is used for pre-heating purposes. Pre-heating itself can be effected under atmospheric pressure thereby pressure-releasing the steam obtained in the drying stage. Pre-heating is effected within a bunker (1) being connected via a pressure lock (6) with an autoclave (7). Steam is supplied via a conduit (2) to the solid materials to be pre-heated.The condensed water is discharged from the bunker (1) via a conduit (3). Additional conduits (5) can be connected to the bunker (1) for discharging the condensate from different cross-sectional planes.
Description
~,~51~
The present invention refer~ to a process for drying organic solid materials9 particularly brown coals,in which the pre-heated solid materials are, preferably continuously1 passed through at least one drying stage and are there subjected to the action o~ saturated steam a~ super-atmo~pheric pressure and at elevated temperature. Particularly when drying brown coals it is known that the frequently considerable humidity content of the brown coal consi~ts of a major part of water absorbed within the capillaries but also of chemically combined water which can when immediately heating the coal only ba removed with a high energy expenditure. It is already known that this water can be expelled by means o~ steam but also by means of hot water. There are also known processes which allow to a ~emi-continuous drying process. Such known proces~e~ have ~requently made a substantial better use of the energy supplied than the original FleiBner-~ocess,but the problem of water removal was only insuf~iciently solved by the known proces~es. The solid materials to be supplied to the drying ~$age operated with sa-turated steam must be pre-heated and with the known processes o~ this kind pre-heating is e~fected by suspending and heating the solid materials in water. A comparatively great water balla~t is, however, introduced into the drying stage operated with saturated ~team by this suspension and this water ballast must be heated within the drying stage operated with saturated steam for which purpose a comparatively great heat exp~nditure is re-quired.
~S1864 ~ he invention now aims at e~onomi~ing such a drying process and to reduce the consumption of heat energy. The invention, therefore,essentially consists in that pre-heating o~ the solid material is e:~fected by treatme~t with steam and that the con-densate formed is removed priorto introducing the solid material~
into the drying stage operated with saturated steam. In this manner, the water ballast , with ~hich the solid materials are introduced i~to the drying stage operated ~ith saturated steam, is substantially reduced ~nd only the solid materials itsei~
must be further heated within the drying stage operated with saturated steam. Thu~, also the amount of water is reduced which has to be removed from the drying stage operated with saturatsd steam. According to the invention, the solid materials are con-veniently pre-heated by treatment with saturated steam. Satu rated steam is produced during the drying process and according to a pre~erred embodiment o~ the invention saturated ste~m o~-tained during the drying process is used for pre-heating the solid materials9 noting that also heated steam can be used if such steam is generated during the dryin6 process Thus, energy consumption can be reduced and the drying process can be made more economic. For example, the steam ~ormed by pre~sure-relaa-sing the was~b water, being under a high pressure9 from the drying process can, according to the invention, be used ~or pre-heating the solid materials.
The solid materials to be pre-heated are conveniently under atmospheric pressure. Thus it is made possible to use a simple bunker for receiving the solid materials to be pre-heated. Sub-sequently, the solid ~aterials are in usual mannar introduced ~L51~369L
via a pressure lock into the auto~lave containing the atmos-phere of saturated ~team~ The apparatus according to the in-vention is thus es~entially characterized by a bunker for the solid materials to be pre-héated, said bunker being in connec~
tion with an autoclave via a pressure lock and a ~team supply conduit and a discharge conduit for condensed water bein~ connec-tedtosa~ ~t~ethe discharge oonduit being connected to the autoclave atrits lowermost area.
The condensate formed i~ thus immediately discharged end can no more load the pre-heated solid material~. In this case andaccording to the invention, at least one additional conduit for discharging the condensate can be connected to the bunker at a higher level. This is o~ advantage particularly if fine-grained solid materials, a~ove all brown coals, having a par-ticle size from 1 ~ m to 5mm are subjected to the dryi~g proee~s.
In such a case, it might oocurr that the condensed water for~
med is too slowly ~lowing through the charge containe~ withln the pre-heating bunker and if one or more additional conduits are connected to the bunker at a higher level the condensate~
formed can more rapidly be dischar~ed.
In the drawing the invention is further illustrated with reference to a ~ow chart for treating of brown coal The brown coal ls introduced into ~he pre ~eating bunker 1, which is open on top, either in lumpy form or in fine-grai~ed form. Saturated steam is ~lown i~o the pre-heating bunker ~ia a conduit ~ The condensate formed is, via a filter 4, removed as waste water9 through a conduit 3 connected to the lower 1~5~864 portion of the bunker. A second conduit 5 is connected to the pre-heating bunker 1 at a higher level. From the pre-heating bunker 1, the pre-heated coal, which is substantially dry or has an only low water ballast, is introduced via a pressure lock 6 into an autoclave 7 within which the coal is downwardly ~liding over cascades 8 of sieves~This autoclave is maintained under super-atmospheric pressure and saturated s-team is introduced at the lower end of the autoclave via a conduit 9. The~solid mate-rials are subsequently discharged by means of a conveyor screw 10 and supplied9 i~ desired,to still ~urther drying stages. The waste water is removed from the autoclave via oonduits 11 and a collecting conduit 12 and is flowing into a pressure-relèase-vessel 13, The saturated steam generated within the pressure-release vessel is introduced into the pre-heating bun~er 1 ~ia the conduit 2. The water is removed via a conduit 14 and can be used ~or pre-heating purposes br lik~e purposes within the drying process.
.
The present invention refer~ to a process for drying organic solid materials9 particularly brown coals,in which the pre-heated solid materials are, preferably continuously1 passed through at least one drying stage and are there subjected to the action o~ saturated steam a~ super-atmo~pheric pressure and at elevated temperature. Particularly when drying brown coals it is known that the frequently considerable humidity content of the brown coal consi~ts of a major part of water absorbed within the capillaries but also of chemically combined water which can when immediately heating the coal only ba removed with a high energy expenditure. It is already known that this water can be expelled by means o~ steam but also by means of hot water. There are also known processes which allow to a ~emi-continuous drying process. Such known proces~e~ have ~requently made a substantial better use of the energy supplied than the original FleiBner-~ocess,but the problem of water removal was only insuf~iciently solved by the known proces~es. The solid materials to be supplied to the drying ~$age operated with sa-turated steam must be pre-heated and with the known processes o~ this kind pre-heating is e~fected by suspending and heating the solid materials in water. A comparatively great water balla~t is, however, introduced into the drying stage operated with saturated ~team by this suspension and this water ballast must be heated within the drying stage operated with saturated steam for which purpose a comparatively great heat exp~nditure is re-quired.
~S1864 ~ he invention now aims at e~onomi~ing such a drying process and to reduce the consumption of heat energy. The invention, therefore,essentially consists in that pre-heating o~ the solid material is e:~fected by treatme~t with steam and that the con-densate formed is removed priorto introducing the solid material~
into the drying stage operated with saturated steam. In this manner, the water ballast , with ~hich the solid materials are introduced i~to the drying stage operated ~ith saturated steam, is substantially reduced ~nd only the solid materials itsei~
must be further heated within the drying stage operated with saturated steam. Thu~, also the amount of water is reduced which has to be removed from the drying stage operated with saturatsd steam. According to the invention, the solid materials are con-veniently pre-heated by treatment with saturated steam. Satu rated steam is produced during the drying process and according to a pre~erred embodiment o~ the invention saturated ste~m o~-tained during the drying process is used for pre-heating the solid materials9 noting that also heated steam can be used if such steam is generated during the dryin6 process Thus, energy consumption can be reduced and the drying process can be made more economic. For example, the steam ~ormed by pre~sure-relaa-sing the was~b water, being under a high pressure9 from the drying process can, according to the invention, be used ~or pre-heating the solid materials.
The solid materials to be pre-heated are conveniently under atmospheric pressure. Thus it is made possible to use a simple bunker for receiving the solid materials to be pre-heated. Sub-sequently, the solid ~aterials are in usual mannar introduced ~L51~369L
via a pressure lock into the auto~lave containing the atmos-phere of saturated ~team~ The apparatus according to the in-vention is thus es~entially characterized by a bunker for the solid materials to be pre-héated, said bunker being in connec~
tion with an autoclave via a pressure lock and a ~team supply conduit and a discharge conduit for condensed water bein~ connec-tedtosa~ ~t~ethe discharge oonduit being connected to the autoclave atrits lowermost area.
The condensate formed i~ thus immediately discharged end can no more load the pre-heated solid material~. In this case andaccording to the invention, at least one additional conduit for discharging the condensate can be connected to the bunker at a higher level. This is o~ advantage particularly if fine-grained solid materials, a~ove all brown coals, having a par-ticle size from 1 ~ m to 5mm are subjected to the dryi~g proee~s.
In such a case, it might oocurr that the condensed water for~
med is too slowly ~lowing through the charge containe~ withln the pre-heating bunker and if one or more additional conduits are connected to the bunker at a higher level the condensate~
formed can more rapidly be dischar~ed.
In the drawing the invention is further illustrated with reference to a ~ow chart for treating of brown coal The brown coal ls introduced into ~he pre ~eating bunker 1, which is open on top, either in lumpy form or in fine-grai~ed form. Saturated steam is ~lown i~o the pre-heating bunker ~ia a conduit ~ The condensate formed is, via a filter 4, removed as waste water9 through a conduit 3 connected to the lower 1~5~864 portion of the bunker. A second conduit 5 is connected to the pre-heating bunker 1 at a higher level. From the pre-heating bunker 1, the pre-heated coal, which is substantially dry or has an only low water ballast, is introduced via a pressure lock 6 into an autoclave 7 within which the coal is downwardly ~liding over cascades 8 of sieves~This autoclave is maintained under super-atmospheric pressure and saturated s-team is introduced at the lower end of the autoclave via a conduit 9. The~solid mate-rials are subsequently discharged by means of a conveyor screw 10 and supplied9 i~ desired,to still ~urther drying stages. The waste water is removed from the autoclave via oonduits 11 and a collecting conduit 12 and is flowing into a pressure-relèase-vessel 13, The saturated steam generated within the pressure-release vessel is introduced into the pre-heating bun~er 1 ~ia the conduit 2. The water is removed via a conduit 14 and can be used ~or pre-heating purposes br lik~e purposes within the drying process.
.
Claims (7)
1. Process for drying organic solid materials, particularly brown coals, in which the preheated solid materials are, preferably continuously, passed through at least one drying stage within which the solid materials are subjected to the action of saturated steam at super-atmospheric pressure and at elevated temperature, characterized in that preheating of the solid materials is effected by treatment with steam and the condensate formed is discharged prior to introducing the solid materials into the drying stage operated with saturated steam.
2. Process as claimed in claim 1, characterized in that the solid materials are preheated by treatment with saturated steam.
3. Process as claimed in claim 1, characterized in that steam obtained during the drying process is used for pre-heating the solid materials.
4. Process as claimed in claim 1, 2 or 3, characterized in that the steam formed on pressure-releasing the waste water, being under high pressure, of the drying process is used for preheating the solid materials.
5. Process as claimed in claim 1, 2 or 3, characterized in that the solid materials to be preheated are under atmospheric pressure.
6. Apparatus for drying organic solid materials, particularly brown coals, characterized by a bunker for the solid materials to be preheated, said bunker being in connection with an autoclave via a pressure lock, a steam supply conduit being connected to the hunker having connected thereto at the lowermost portion a discharge conduit for the condensed water.
7. Apparatus as claimed in claim 6, characterized in that at least one additional conduit for removing the con-densate is connected at an area of the bunker located at a higher level.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT31080A AT366089B (en) | 1980-01-21 | 1980-01-21 | METHOD AND DEVICE FOR DRYING AND CONVERTING ORGANIC SOLIDS, IN PARTICULAR BROWN COALS |
| ATA310/80 | 1980-01-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1151864A true CA1151864A (en) | 1983-08-16 |
Family
ID=3487170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000365787A Expired CA1151864A (en) | 1980-01-21 | 1980-11-28 | Process and apparatus for drying organic solid materials, particularly brown coals |
Country Status (10)
| Country | Link |
|---|---|
| JP (1) | JPS56108087A (en) |
| AT (1) | AT366089B (en) |
| AU (1) | AU539545B2 (en) |
| CA (1) | CA1151864A (en) |
| DD (1) | DD157018A5 (en) |
| DE (1) | DE3045757C2 (en) |
| GB (1) | GB2067731B (en) |
| GR (1) | GR73156B (en) |
| IN (1) | IN153090B (en) |
| PL (1) | PL228527A1 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0155927B1 (en) * | 1984-03-21 | 1988-07-27 | VOEST-ALPINE Aktiengesellschaft | Drying installation for lignite with a high water content |
| GB8507109D0 (en) * | 1985-03-19 | 1985-04-24 | Burdett S | Quarry heat recovery |
| DE3616218C1 (en) * | 1986-05-14 | 1987-07-02 | Rheinische Braunkohlenw Ag | Method for continuous drying of water-containing bulk materials |
| DE3640610A1 (en) * | 1986-11-27 | 1988-06-09 | Uhde Gmbh | METHOD AND DEVICE FOR CONDITIONING WATER-CONTAINING SHEET MATERIAL |
| JPS63210192A (en) * | 1987-02-27 | 1988-08-31 | Mitsubishi Heavy Ind Ltd | Method of heat treating coal |
| DE19537286B4 (en) * | 1995-09-22 | 2006-03-23 | Dieffenbacher Gmbh + Co. Kg | Press for reducing the water content of sludge |
| DE19710708B4 (en) * | 1995-09-22 | 2009-01-29 | Dieffenbacher Gmbh + Co. Kg | Plant and press for reducing the water content of solid materials such as sludges and / or lignite coal and a control or regulating device therefor |
| DE19535315B4 (en) * | 1995-09-22 | 2006-02-02 | Dieffenbacher Gmbh + Co. Kg | Dewatering e.g. raw brown coal - comprises preheating feed material, sealing in steam-tight pressure chamber, subjecting to steam injection and applying mechanical pressure |
| CN113091443B (en) | 2021-04-27 | 2022-05-24 | 中国矿业大学 | Transient dehydration upgrading and warm-pressing instant device system for lignite |
| CN114294934B (en) * | 2021-12-30 | 2023-05-05 | 江苏道明化学有限公司 | Dicumyl peroxide drying process |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT244292B (en) * | 1963-03-29 | 1965-12-27 | Georges Joffe | Method and device for batch drying of colloidal substances, in particular lignite |
| AT260800B (en) * | 1964-07-15 | 1968-03-25 | Oesterr Alpine Montan | Process for drying coal and apparatus for carrying out the process |
| AT276256B (en) * | 1967-03-17 | 1969-11-25 | Oesterr Alpine Montan | Method and device for drying lignitic brown coal |
| GR70664B (en) * | 1979-10-15 | 1982-12-06 | Voest Alpine Ag |
-
1980
- 1980-01-21 AT AT31080A patent/AT366089B/en not_active IP Right Cessation
- 1980-11-27 AU AU64768/80A patent/AU539545B2/en not_active Ceased
- 1980-11-28 CA CA000365787A patent/CA1151864A/en not_active Expired
- 1980-11-28 IN IN1318/CAL/80A patent/IN153090B/en unknown
- 1980-12-03 GB GB8038790A patent/GB2067731B/en not_active Expired
- 1980-12-04 DE DE19803045757 patent/DE3045757C2/en not_active Expired
- 1980-12-17 PL PL22852780A patent/PL228527A1/xx unknown
-
1981
- 1981-01-12 GR GR63841A patent/GR73156B/el unknown
- 1981-01-12 DD DD22693381A patent/DD157018A5/en unknown
- 1981-01-21 JP JP655781A patent/JPS56108087A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56108087A (en) | 1981-08-27 |
| IN153090B (en) | 1984-06-02 |
| PL228527A1 (en) | 1981-08-07 |
| DE3045757C2 (en) | 1984-08-30 |
| AU6476880A (en) | 1981-07-30 |
| AT366089B (en) | 1982-03-10 |
| DD157018A5 (en) | 1982-10-06 |
| AU539545B2 (en) | 1984-10-04 |
| GB2067731B (en) | 1983-12-14 |
| ATA31080A (en) | 1981-07-15 |
| DE3045757A1 (en) | 1981-10-01 |
| GR73156B (en) | 1984-02-13 |
| GB2067731A (en) | 1981-07-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry | ||
| MKEX | Expiry |
Effective date: 20000816 |