GB2072039A - Bypass arrangements for moving fluidized beds - Google Patents
Bypass arrangements for moving fluidized beds Download PDFInfo
- Publication number
- GB2072039A GB2072039A GB8035465A GB8035465A GB2072039A GB 2072039 A GB2072039 A GB 2072039A GB 8035465 A GB8035465 A GB 8035465A GB 8035465 A GB8035465 A GB 8035465A GB 2072039 A GB2072039 A GB 2072039A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bed
- channel
- point
- particles
- fluidised
- 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.)
- Withdrawn
Links
- 239000002245 particle Substances 0.000 claims abstract description 50
- 239000007787 solid Substances 0.000 claims abstract description 41
- 238000011144 upstream manufacturing Methods 0.000 claims description 5
- 239000003570 air Substances 0.000 description 5
- 239000012080 ambient air Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
- B01J8/1809—Controlling processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
- B01J8/24—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique
- B01J8/34—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique with stationary packing material in the fluidised bed, e.g. bricks, wire rings, baffles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
- B01J8/24—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique
- B01J8/36—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique with fluidised bed through which there is an essentially horizontal flow of particles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
- F28C3/00—Other direct-contact heat-exchange apparatus
- F28C3/10—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material
- F28C3/12—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material the heat-exchange medium being a particulate material and a gas, vapour, or liquid
- F28C3/16—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material the heat-exchange medium being a particulate material and a gas, vapour, or liquid the particulate material forming a bed, e.g. fluidised, on vibratory sieves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
- B01J2208/00008—Controlling the process
- B01J2208/0061—Controlling the level
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
Abstract
A regulatable bypass device (9) diverts some of the solids particles away from the path (8) for fluidized particles to be treated in the apparatus at a first point (10) and returns them to the path (8) at a second point (11) downstream of the first in the direction of travel of the particles and in the fluidised bed (3) portion of the path (8). By adjustment of the bypass device (9) the apparatus can be adapted to fluctuating temperatures, of the air which is used to maintain the fluidised bed (3), or to fluctuating temperatures of the solids particles to be treated. The bypass device (9) may comprise an adjustable dam (12) (Figure 3), or a twin chute (14) (Figure 7) in which the proportion of particles fed into each chute may be varied. <IMAGE>
Description
SPECIFICATION
Fluidised bed apparatus
The invention relates to a fluidised bed apparatus wherein solids particles which are to be treated in a fluidised layer travel along a path comprising an input device for the solids particles, a channelshaped bed for the fluidised layer and a discharge device for the treated solids particles.
Fuidised bed apparatus of this kind can be used to cool hot particles of solids to a desired temperature.
Advantageously, the ambient air is used to produce the fluidised layer and cool the solids particles in the fluidised bed.
However, in certain climatic conditions, the temperature of the ambient air may vary by about 30D in the course of a whole day. If the input temperature of the solids particles remains the same and if the discharge temperature of the solids particles is to remain the same over a full twenty four hour period, a fluidised bed is required having in the day a base surface which is larger, typically by a factor of four during the day than during the night. Thus, it is necessary to usefluidised bed apparatus of different sizes alternately, or else the ambient air must be cooled to a constant temperature by means of a cooling device before entering the fluidised bed apparatus. Both solutions are very expensive.
The aim of the invention is to provide a fluidised bed apparatus which can be adapted to fluctuating temperature ranges of the air used for the production of the fluidised bed, or to fluctuating temperature ranges of the solids particles which are to be treated. To this end, and according to the invention, a regulatable bypass device is included for diverting at least some of the solids particles from a first point on the path and for returning such diverted particles to a second point on the path downstream of the first point and in the channel-shaped bed portion of the path.
To simplify the bypass device, it is preferred that the channel-shaped bed extends in such a manner that the first and second points are located side by side. Typical channel-shaped beds for such embodiments are of U-shaped or circular configuration.
Additional advantages may be obtained if the first and second points are both located in the region of the fluidised layer and the bypass device has an adjustable dam for solids particles contained in the fluidised layer. This results in a particularly simple construction. It may alternatively or additionally be beneficial if the first point is located in the region of the input device for the solids particles. One preferred form of bypass device comprises a pivotable inlet channel for solids particles opening into a twin chute located between the upstream and downstream ends of the fluidised layer.
In order to obtain a wide range of adjustment, it is advantageous if the first point is located no further downstream than the upstream end of the bed, preferably at or adjacent the upstream end. It can also be beneficial if the second point is located at or adjacent the downstream end of the bed.
The invention will now be described by way of
example and with reference to the accompanying
drawings, which are simplified representations of
some embodiments thereof and wherein:
Figure 1 is a plan view of a first embodiment of the
invention;
Figure 2 is a developed sectional view taken on the
line ll-ll in Figure 1;
Figure 3 is a sectional view taken on the line Ill-Ill in Figure 1;
Figure 4 is a plan view of a second embodiment of the invention; Figure 5 is a plan view of a third embodiment of the invention;
Figure 6 is a sectional view taken on the line Vl-VI in Figure 5; and
Figure 7 is a sectional view taken on the lineVII-VI1 in Figure 5.
Corresponding parts are given the same reference
numerals in each of the Figures.
The fluidised bed apparatus shown in Figures 1 to 3 comprises an input device 1 for the solids particles which are to be treated, a channel-shaped bed 2 for a fluidised layer 3 and a dicharge device 4forthe treated particles of solids. The channel-shaped bed 2 has a base 5 provided with air passage openings, whilst an air supply box 6 is mounted below said base. The air required for producing the fluidised bed 3 is supplied to the box 6 through a pipe system 7.
A path 8 for the solids particles to be treated corresponds to the section line Il-I I shown in Figure 1 and comprises the input device 1, the channelshaped bed 2 for the fluidised layer 3 and the discharge device 4 for the treated solids particles.
A bypass device 9 diverts some of the solids particles which are to be treated away from the path 8 at a point 10 and feeds them back on to the path 8 at a point 10 and feeds them back on to the path 8 at a point 11 on the fluidised layer 3 which is downstream in the direction of travel of the solids particles.
Whereas the portion of solids particles which have not been diverted travels along the entire path 8, the diverted portion of the solids particles travels over only a fraction of the path 8. The average treatment time of the solids particles in the fluidised layer can thus be varied within wide limits. Furthermore, at the point 11,thorough mixing occurs between the solids particles given a long treatment time and those given a short treatment time, with the result that the solids particles all leave the fluidised bed apparatus at the same temperature and in a homogeneous flow through the discharge device 4.
The channel-shaped bed 2 extends in such a way that the diversion point 10 and the feed point 11 are
located side by side. In this embodiment the chan
nel-shaped bed 2 is of U-shaped configuration.
However, it may also be circular, for example, as shown in Figure 4.
The diversion point 10 is located in the region of the fluidised layer 3, and the bypass device 9 has an
adjustable dam 12 for the solids particles contained -in the fluidised layer 3.
In the embodiment shown in Figures 5, 6 and 7, the diversion point 10 is located in the region of the input device 1 for the solids particles which are to be treated. The bypass device 9 has a pivotable inlet channel 13 for the solids particles which are to be treated, and this channel 13 opens into a twin chute 14 located between the beginning and end ofthe fluidised layer 3. The twin chute 14 is shown in
Figures 5 and 7, but in Figure 6 only its position is indicated by dotted lines.
If inlet channel 13 is pivoted, the input device 1 can distribute the particles to be treated in the desired proportions between the entire path and the bypass.
The base 5 of the bed 2 is lower at the feed point 11 for the solids particles than the base 5 at the region of the bed 2 adjacentto; i.e., preceding, the feed point 11. As a resuit, the fluidised layer 3 at the feed point 11 is high enough to ensure that the solids particles fed in cannot fall sharpiy on to the base 5.
The input point at the start of the fluidised layer 3 also has a lower base than the rest of the bed 2.
In all the embodiments shown, the diversion point 10 is located, at furthest, at the start of the fluidised layer 3 and the feed point 11 is located at the end of the fluidised layer 3, so as to give a very wide adjustment range.
The bypass device 9 can be reguiated by regulating means (not shown). The entry or exit tempera tureofthe solids particles orthe entry temperature or exit temperature of the air used to produce the fluidised bed may be used as the regulating factors, and if these temperatures change, the proportion of solids particles which are carried along the bypass can be appropriately increased or decreased.
Ifthefluidised bed apparatus is used, for example, for cooling the solids particles, to ensure a constant change in temperature (between the entry and exit temperatures of the solids particles) the regulating means can increase the proportion of the solids particles which are carried in the by pass if the exit temperature of the solids particles falls, and vice versa.
Claims (11)
1. Fluidised bed apparatus for the treatment of solids particles in a fluidised layer, in which apparatus is defined a path for such particles, the path comprising an input device for the particles, a channel-shaped bed for carrying a said fluidised layer; and a discharge device for the treated particles, the apparatus including a regulatable bypass device for diverting at least some of such solids particles from a first point on the path, and for returning such diverted particles to a second point on the path downstream of the first point and in the channel-shaped bed portion of the path.
2. Apparatus according to Claim 1 wherein the channel-shaped bed extends in such a manner that the first and second points are located side by side,
3. Apparatus according to Claim 2 wherein the channel-shaped bed is of U-shaped configuration.
4. Apparatus according to Claim 2 wherein the channel-shaped bed is of circular configuration.
5. Apparatus according to any preceding Claim wherein the first point is located in the region of the channel-shaped bed and wherein the bypass device comprises an adjustable dam for solids particles contained in a said fluidised layer on the bed.
6. Apparatus according to any of Claims 1 to 4 wherein the first point is located in the region of the input device for solids particles.
7. Apparatus according to Claim 6 wherein the bypass device comprises a pivotable inlet channel for solids particles opening into a twin chute located between the upstream and downstream ends of the channel-shaped bed.
8. Fluidised bed apparatus according to any preceding Claim wherein the first point is located no further downstream than the upstream end of the channel-shaped bed,
9. Fluidised bed apparatus according to any
Claim wherein the second point is located at or adjacent the downstream end of the channel-shaped bed.
10. Apparatus according to any preceding Claim wherein the base of the channel-shaped bed at the second point is lower than at points of the bed adjacent thereto.
11. Fluidised bed apparatus substantially as described herein with reference to Figures 1 to 3,
Figure 4, or Figures 5 to 7 of the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH995079 | 1979-11-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2072039A true GB2072039A (en) | 1981-09-30 |
Family
ID=4357455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8035465A Withdrawn GB2072039A (en) | 1979-11-06 | 1980-11-05 | Bypass arrangements for moving fluidized beds |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS5673537A (en) |
| ES (1) | ES8201439A1 (en) |
| FR (1) | FR2468403A1 (en) |
| GB (1) | GB2072039A (en) |
| IT (1) | IT1134169B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006067546A1 (en) * | 2004-12-23 | 2006-06-29 | Collette Nv | Fluid bed apparatus module and method of changing a first module for a second module in a fluid bed apparatus |
| RU2602888C2 (en) * | 2011-05-12 | 2016-11-20 | Глатт Инженьертехник Гмбх | Device for continuous treatment of solid substances in apparatus with fluidised bed |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE475403A (en) * | 1947-07-29 | |||
| DE2448354C3 (en) * | 1974-10-10 | 1978-12-21 | Bergwerksverband Gmbh, 4300 Essen | Fluidized bed reactor for the generation of steam, combustible gases and liquid by-products from coal |
-
1980
- 1980-11-04 IT IT25760/80A patent/IT1134169B/en active
- 1980-11-05 ES ES496571A patent/ES8201439A1/en not_active Expired
- 1980-11-05 FR FR8023574A patent/FR2468403A1/en not_active Withdrawn
- 1980-11-05 GB GB8035465A patent/GB2072039A/en not_active Withdrawn
- 1980-11-06 JP JP15644380A patent/JPS5673537A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006067546A1 (en) * | 2004-12-23 | 2006-06-29 | Collette Nv | Fluid bed apparatus module and method of changing a first module for a second module in a fluid bed apparatus |
| JP2008525751A (en) * | 2004-12-23 | 2008-07-17 | コレッテ・ナムローゼ・フェンノートシャップ | Fluidized bed apparatus module and method for replacing first module in fluidized bed apparatus with second module |
| US7727484B2 (en) | 2004-12-23 | 2010-06-01 | Collette Nv | Fluid bed apparatus module and method of changing a first module for a second module in a fluid bed apparatus |
| JP4652417B2 (en) * | 2004-12-23 | 2011-03-16 | コレッテ・ナムローゼ・フェンノートシャップ | Fluidized bed apparatus module and method for replacing first module in fluidized bed apparatus with second module |
| RU2602888C2 (en) * | 2011-05-12 | 2016-11-20 | Глатт Инженьертехник Гмбх | Device for continuous treatment of solid substances in apparatus with fluidised bed |
Also Published As
| Publication number | Publication date |
|---|---|
| ES496571A0 (en) | 1981-12-16 |
| JPS5673537A (en) | 1981-06-18 |
| IT8025760A0 (en) | 1980-11-04 |
| IT1134169B (en) | 1986-07-31 |
| ES8201439A1 (en) | 1981-12-16 |
| FR2468403A1 (en) | 1981-05-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |