GB2067731A - Drying solid organic materials - Google Patents
Drying solid organic materials Download PDFInfo
- Publication number
- GB2067731A GB2067731A GB8038790A GB8038790A GB2067731A GB 2067731 A GB2067731 A GB 2067731A GB 8038790 A GB8038790 A GB 8038790A GB 8038790 A GB8038790 A GB 8038790A GB 2067731 A GB2067731 A GB 2067731A
- Authority
- GB
- United Kingdom
- Prior art keywords
- solid materials
- preheated
- steam
- drying
- bunker
- 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.)
- Granted
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
Process for drying organic solid materials, particularly brown coal, in which the solid materials are preheated and passed through at least one drying stage in which the solid materials are subjected to the action of saturated steam at super- atmospheric pressure and at elevated temperature, characterised in that preheating of the solid materials is effected by treatment with steam and the condensate formed is discharged prior to introducing the preheated solid materials into the drying stage operated with saturated steam. Apparatus for carrying out the process comprises a bunker (1) for the solid materials to be preheated, connected to an autoclave (7) via a pressure lock (6), a steam supply conduit (2) being connected to the said bunker (1) having connected thereto at the lowermost portion a discharge conduit (3) for the condensed water. <IMAGE>
Description
SPECIFICATION
Process and apparatus for drying organic solid
materials
This invention relates to a process and
apparatus for drying organic solid materials,
particularly brown coals, in which the solid
materials are preheated and passed, preferably
continuously, through at least one drying stage in
which the solid materials are subjected to the
action of saturated steam at super-atmospheric
pressure and at elevated temperature.
Particularly when drying brown coals, the high
moisture content of the brown coal frequently
comprises in large part water contained within the
capillaries of the material, and also chemically
combined water, which moisture requires a high
expenditure of heat energy for its removal. It is
known that this water can be expelled by means of
steam or hot water. There are also known
processes which allow a semi-continuous drying
process to be carried out. Such processes often
result in an improved use of energy supplied than
the original (Fleissner) process, but the problem of
water removal has hitherto only been partly
solved. The solid materials to be supplied to the
drying stage operated with saturated steam, must
be preheated and with the known processes of
this kind preheating is effected by suspending and
heating the solid materials in water.A
comparatively large water content is however
thereby introduced into the drying stage operated
with saturated steam and this water ballast must
be heated within the drying stage operated with
saturated steam for which purpose a high heat
expenditure is required.
The invention is directed to improving the
economies of such a drying process particularly to
reduce the consumption of heat energy. To this
end the invention provides a process for drying
organic solid materials, in which the solid
materials are preheated and passed through at
least one drying stage in which the solid materials
are subjected to the action of saturated steam at
super-atmospheric pressure and at elevated
temperature, characterised in that preheating of
the solid materials is effected by treatment with
steam and condensate formed is discharged prior
to introducing the preheated solid materials into
the drying stage operated with saturated steam.
In this manner water ballast introduced with
the preheated materials into the drying stage operated with saturated steam, is substantially
reduced and only the solid materials itself need be
further heated within the drying stage operated Swith saturated steam. Thus also the amount of
water which has to be removed from the drying
stage operated with saturated steam is reduced.
According to the invention the solid materials
may conveniently be preheated by treatment with
saturated steam. Saturated steam is produced
during the drying process and according to a
preferred embodiment of the invention saturated
steam obtained during the drying process is used
for preheating the solid materials. Heated steam can however be used if such steam is generated during the drying princess. Thus the energy consumption is reduced and the drying process is made more economic. For example the steam formed by pressure-releasing the waste water, being under a high pressure, from the drying process can, according to the invention, be used for preheating the solid materials.
The solid materials to be preheated are conveniently under atmospheric pressure. Thus it is possible to use a simple bunker for receiving the solid materials to be preheated. Subsequently the solid materials are, in usual manner, introduced via a pressure lock into the autoclave containing the atmosphere of saturated steam. The apparatus according to the invention is thus characterised by a bunker for the solid materials to be preheated, said bunker being in connection with an autoclave via a pressure lock and a steam supply conduit and a discharge conduit for condensed water being connected to said autoclave the discharge conduit being connected to the autoclave at its lowermost area.
The condensate formed is thus immediately discharged and can no longer load the preheated solid materials. According to a preferred feature of the apparatus of the invention, at least one additional conduit for discharging the condensate can be connected to the bunker at a higher level.
This is of advantage particularly if fine-grained solid materials, particularly brown coals, having a particle size from 1 ,um to 5 mm are subjected to the drying process. With such materials the condensed water formed flows too slowly through the charge contained within the preheating bunker, and if one or more such additional conduits are connected to the bunker at a higher level, the condensates formed can more rapidly be discharged.
The invention is further illustrated in the drawing which is in the form of a flow chart for treating brown coal.
The brown coal is introduced into the preheating bunker 1 , which is open at the top, either in lumpy form or in fine-grained form.
Saturated steam is blown into the preheating bunker via a conduit 2. The condensate formed is, via a filter 4, removed as waste water through conduit 3 connected to the lower portion of the bunker. A second conduit 5 is connected to the preheating bunker 1 at a higher level. From the preheating bunker 1, the preheated coal, which is substantially dry or has only a low residual water content, is introduced via a pressure lock 6 into an autoclave 7 within which the coal is downwardly sliding over cascades 8 of sieves. This autoclave is maintained under super-atmospheric pressure and saturated steam is introduced at the lower end of the autoclave via a conduit 9. The solid materials are subsequently discharged by means of a conveyor screw 10 and supplied, if desired, to further drying stage(s). The waste water is removed from the autoclave via conduits 11 and a collecting conduit 1 2 and flows into a pressurerelease vessel 1 3. The saturated steam generated within the pressure-release vessel is introduced into the preheating bunker 1 via the conduit 2. The water is removed via a conduit 14 and can be used for preheating purposes or like purposes within the drying process.
Claims (11)
1. A process for drying organic solid materials, in which the solid materials are preheated and passed through at least one drying stage in which the solid materials are subjected to the action of saturated steam at super-atmospheric pressure and at elevated temperature, characterised in that preheating of the solid materials is effected by treatment with steam and the condensate formed is discharged prior to introducing the preheated solid materials into the drying stage operated with saturated steam.
2. A process as claimed in Claim 1, in which the solid materials are preheated by treatment with saturated steam.
3. A process as claimed in Claim 1 or Claim 2, in which steam obtained during the drying process is used for the preheating of the solid materials.
4. A process as claimed in any of Claims 1 to 3, wherein the steam formed on pressure-releasing of the waste water under high pressure, from the drying process, is used for preheating the solid materials.
5. A process as claimed in any of Claims 1 to 4, wherein the solid materials to be preheated are under atmospheric pressure.
6. A process as claimed in any of Claims 1 to 5, wherein the said organic solid materials is a brown coal.
7. A process as claimed in Claim 1, substantially as hereinbefore described with - particular reference to the accompanying drawing.
8. Apparatus for carrying out the process - according to any of Claims 1 to 7, comprising a bunker (1) for the solid materials to be preheated, connected to an autoclave (7) via a pressure lock (6), a steam supply conduit (2) being connected to the said bunker (1) having connected thereto at the lowermost portion a discharge conduit (3) for the condensed water.
9. Apparatus as claimed in Claim 8, wherein at least one additional conduit (5) for removing the condensate is connected at an area of the bunker (1) located at a higher level.
10. Apparatus as claimed in Claim 8 or Claim 9, wherein continuous discharge means for dried organic solid materials are provided for the said autoclave.
11. Apparatus as claimed in Claim 8, substantially as hereinbefore described and illustrated in the accompanying drawing.
Applications Claiming Priority (1)
| 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2067731A true GB2067731A (en) | 1981-07-30 |
| GB2067731B GB2067731B (en) | 1983-12-14 |
Family
ID=3487170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8038790A Expired GB2067731B (en) | 1980-01-21 | 1980-12-03 | Drying solid organic materials |
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) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0155927A2 (en) * | 1984-03-21 | 1985-09-25 | VOEST-ALPINE Aktiengesellschaft | Drying installation for lignite with a high water content |
| EP0195642A2 (en) * | 1985-03-19 | 1986-09-24 | Savile Burdett | Method and apparatus for recovering heat |
| CN114294934A (en) * | 2021-12-30 | 2022-04-08 | 江苏道明化学有限公司 | Dicumyl peroxide drying process |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| DE19537286B4 (en) * | 1995-09-22 | 2006-03-23 | Dieffenbacher Gmbh + Co. Kg | Press for reducing the water content of sludge |
| 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 |
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 IN IN1318/CAL/80A patent/IN153090B/en unknown
- 1980-11-28 CA CA000365787A patent/CA1151864A/en not_active Expired
- 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
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0155927A2 (en) * | 1984-03-21 | 1985-09-25 | VOEST-ALPINE Aktiengesellschaft | Drying installation for lignite with a high water content |
| EP0155927A3 (en) * | 1984-03-21 | 1986-03-26 | Voest-Alpine Aktiengesellschaft | Drying installation for lignite with a high water content |
| EP0195642A2 (en) * | 1985-03-19 | 1986-09-24 | Savile Burdett | Method and apparatus for recovering heat |
| EP0195642A3 (en) * | 1985-03-19 | 1987-06-10 | Savile Burdett | Method and apparatus for recovering heat |
| CN114294934A (en) * | 2021-12-30 | 2022-04-08 | 江苏道明化学有限公司 | Dicumyl peroxide drying process |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3045757C2 (en) | 1984-08-30 |
| DD157018A5 (en) | 1982-10-06 |
| GB2067731B (en) | 1983-12-14 |
| IN153090B (en) | 1984-06-02 |
| ATA31080A (en) | 1981-07-15 |
| JPS56108087A (en) | 1981-08-27 |
| AT366089B (en) | 1982-03-10 |
| CA1151864A (en) | 1983-08-16 |
| PL228527A1 (en) | 1981-08-07 |
| AU539545B2 (en) | 1984-10-04 |
| DE3045757A1 (en) | 1981-10-01 |
| GR73156B (en) | 1984-02-13 |
| AU6476880A (en) | 1981-07-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |