GB2122218A - Treatment of moist fine particulate material - Google Patents
Treatment of moist fine particulate material Download PDFInfo
- Publication number
- GB2122218A GB2122218A GB08217757A GB8217757A GB2122218A GB 2122218 A GB2122218 A GB 2122218A GB 08217757 A GB08217757 A GB 08217757A GB 8217757 A GB8217757 A GB 8217757A GB 2122218 A GB2122218 A GB 2122218A
- Authority
- GB
- United Kingdom
- Prior art keywords
- particulate material
- fine
- polyelectrolyte
- amount
- water absorbing
- 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
- 239000011236 particulate material Substances 0.000 title claims abstract description 31
- 229920000867 polyelectrolyte Polymers 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000000126 substance Substances 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 29
- 238000000034 method Methods 0.000 claims description 13
- 239000011230 binding agent Substances 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 8
- 230000001419 dependent effect Effects 0.000 claims description 4
- 239000003245 coal Substances 0.000 description 16
- 239000008188 pellet Substances 0.000 description 7
- 241000273930 Brevoortia tyrannus Species 0.000 description 6
- 238000005303 weighing Methods 0.000 description 6
- 239000000446 fuel Substances 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L9/00—Treating solid fuels to improve their combustion
- C10L9/10—Treating solid fuels to improve their combustion by using additives
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The moist fine particulate material is mixed with a substance comprising a water absorbing polyelectrolyte.
Description
SPECIFICATION
Treatment of moist fine particulate material
This invention relates to methods and apparatus for the treatment of moist fine particulate material as for example fine coal.
In particular, although not exclusively, the invention relates to the treatment of moist fine coal in order to improve its handlability either for addition to power station blends or to produce a fuel for the industrial market which maintains its form on entering a combustion chamber.
An object of the present invention is to provide improved treatment of fine coal.
According to one aspect of the present invention a method of treating moist fine particulate material is provided wherein the fine material is mixed with a substance comprising a water absorbing polyelectrolyte.
Conveniently, the fine material is mixed with a binding agent.
Advantageously, the fine material mixed with the water absorbing polyelectrolyte and binder is formed into solid or semi solid artifacts.
Advantageously the fine particular material is blended with a relatively large size particulate material.
Preferably, the fine particulate material is blended with the relatively large size particulate material before the water absorbing polyelectrolyte.
Preferably, the moisture contents of the fine particulate material and of the relatively large size material are determined, the proportion of the fine material to the relatively large size material being controlled to obtain a desired mixture content for the blend.
According to other aspects of the present invention apparatus is provided for carrying out the above defined method, the apparatus comprising means for determining the amount of particulate material, means for feeding a desired amount of water absorbing polyelectrolyte to the material, the desired amount being dependent upon the determined amount of particulate material, and means for mixing the particulate material with the water absorbing polyelectrolyte.
Preferably, the apparatus provides means for separately determining the amount of fine particulate material and the amount of relatively large size material, the desired amount of polyelectrolyte being dependent upon the sum of the determined amounts for the materials.
By way of example only, one embodiment of the present invention will be described with reference to the accompanying drawing which shows a flow diagram for a part of a fine coal treatment and pelletisation plant.
Referring to the drawing moist fine coal as for example broken or crushed filter cake typically having a size below 0.5 mm is fed to a storage bunker 1 along a conveyor 2. A moisture monitor 3 ensures that only fine coal having a moisture content within a preselected desired range is fed into the storage bunker. Typically the moisture content of the fine coal is within a range of 28 to 32% water. If the sensed moisture content of the fine coal tends to go higher than the desired range the monitor 3 derives a signal which is fed to a controller such that the fine coal is diverted on to a discharge conveyor 4 and fed for pretreatment.
Upon the monitor 3 sensing that the moisture content of the fine coal is once again within the
desired range, the feed is switched back to the
storage bunker.
Relatively large size coal, as for example jigged slurry, crushed clean coal or untreated smalls typically having a size below 5 mm is fed into a further storage bunker 5 along a conveyor 6. As with the fine coal feed a moisture monitor 7 ensures the feed of relatively large size coal is within a desired range, as for example, 1824% water.
Should the moisture monitor 7 sense that moisture content of the jigged slurry feed is too high then the feed is diverted along conveyor 8 for further treatment. Upon the sensed moisture content once again falling within the desired range, the feed is again switched to the storage bunker.
Each of the storage bunkers 1 and 5 is provided with a controlled discharge 9 and 10, and both discharges are determined by suitable weighing devices 11 and 12, respectively. An output controller 13 receives signals derived by the two weighing devices 11 and 1 2 and feeds control signals to the controlled discharges 9 and 10 to ensure proportion of each material fed on to a collecting conveyor 14 is within a preselected range. In a typical example equal amounts of the two particulate materials are fed on to the collecting conveyor.
A further weighing device 1 5 determines the weight of material passing on the collecting conveyor 14 and a further moisture monitor 1 6 determines the moisture content of the material.
Signals derived by the weighing device 1 5 and the moisture monitor 1 6 and indicative of the sensed parameter are fed to processor controllers 1 7 and 1 8. The processor controller 1 7 processes the signal from the weighing device and controls the amount of a binder as for example cement, fed on to the material passing on the collecting conveyor from a hopper 20. Typically, the amount of cement added is approximately 2% of the weight of the material passing on the conveyor The processor controller 1 8 processes the signal from the weighing device and controls the amount of water absorbing polyelectrolyte fed on to the collecting conveyor from a hopper 21.
Typically the amount of polyelectrolyte delivered is 41 1% of the weight of the material passing on the conveyor. The proportion of polyelectrolyte depending upon the rank and properties of the fine coal being treated. The polyelectrolyte used might be, for example, Alcosorb.
The particulate material together with the determined quantities of binder and polyelectrolyte are discharged into a mixer 22 and mixed by the action of a rapidly moving mixing component. The action of the polyelectrolyte is to effectively absorb the water from the particulate material which thereby behaves as if the moisture content of the mixture is substantially below the actual value. The particulate material discharged from the mixer 22 into a pellet mill 23 is relatively easy to handle.
The material is discharged from the pellet mill 23 in the form of pellets which due to the combined action of the binder and polyelectrolyte tend to be stable and in solid or semi-solid condition.
The pellets produced are suitable for addition to blends fed to power stations or for use as a premium fuel for the industrial market, the pellets tending to maintain their form on entering the combustion chamber.
In other treatment plants the fine particulate material is treated without addition of the relatively large size material.
In still other treatment plants the fuel discharged from the mixer is used in its crude mixed condition. In these plants the binder might be omitted from the mixture. Alternatively, blocks of the mixed material are formed in a solid or semi solid condition.
Instead of using jigged slurry as the relative
large size particulate material it is possible to use any other suitable material, as for example, crushed clean coal or untreated smalls.
In other embodiments of the invention the product is dried, for example, the pellets leaving the pellet mill might be heated. Alternatively, heat might be applied after or during mixing.
Claims (10)
1. A method of treating moist fine particulate material, wherein the fine material is mixed with a substance comprising a water absorbing polyelectrolyte.
2. A method as claimed in claim 1, wherein the fine material is mixed with a binding agent.
3. A method as claimed in claim 3, in which the fine material mixed with the water absorbing polyelectrolyte and binder is formed into solid or semi solid artifacts.
4. A method as claimed in claim 1, 2 or 3, in which the fine particulate material is blended with a relatively larger size particulate material.
5. A method as claimed in claim 4, in which the fine particulate material is blended with the relatively large size particulate material before the water absorbing polyelectrolyte.
6. A method as claimed in claim 5, in which the moisture contents of the fine particulate material and of the relatively large. size material are determined, the proportion of the fine material to the relatively large size material being controlled to obtain a desired mixture content for the blend.
7. Apparatus for carrying out the method claimed in any one of the preceding claims, comprising means for determining the amount of particulate material, means for feeding a desired amount of water absorbing polyelectrolyte to the material, the desired amount being dependent upon the determined amount of particulate material, and means for mixing the particulate material with the water absorbing polyelectrolyte.
8. Apparatus as claimed in claim 7, in which the apparatus provides means for separately determining the amount of fine particulate material and the amount of relatively large sized material, the desired amount of polyelectrolyte being dependent upon the sum of the determined amounts for the material.
9. A method of treating moist fine particulate material substantially as described herein with reference to the accompanying drawing.
10. Apparatus for treating moist fine particulate material substantially as described herein and as shown in the accompanying drawing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08217757A GB2122218B (en) | 1982-06-18 | 1982-06-18 | Treatment of moist fine particulate material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08217757A GB2122218B (en) | 1982-06-18 | 1982-06-18 | Treatment of moist fine particulate material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2122218A true GB2122218A (en) | 1984-01-11 |
| GB2122218B GB2122218B (en) | 1986-03-19 |
Family
ID=10531149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08217757A Expired GB2122218B (en) | 1982-06-18 | 1982-06-18 | Treatment of moist fine particulate material |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2122218B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0277017A2 (en) * | 1987-01-30 | 1988-08-03 | Ciba Specialty Chemicals Water Treatments Limited | Coal compositions and their production |
| US4880858A (en) * | 1985-03-05 | 1989-11-14 | Allied Colloids Limited | Water absorbing polymers |
Citations (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB247431A (en) * | 1925-04-29 | 1926-02-18 | Emile Marcel Eugene Frechou | Improvements in or relating to the manufacture of bodies for the purification of water |
| GB274876A (en) * | 1926-07-24 | 1928-04-26 | Koks- Und Halbkoks-Brikettierungs-Gesellschaft M.B.H. | |
| GB297085A (en) * | 1927-09-14 | 1929-08-08 | Aurele Louis Joseph Voinchet | A process for the manufacture of agglomerated blocks of fuel |
| GB394572A (en) * | 1932-11-19 | 1933-06-29 | Foster Dee Snell | Improvements in or relating to fuel briquettes and the manufacture thereof |
| GB469261A (en) * | 1935-10-12 | 1937-07-12 | Morton Smith | Improvements in the construction of machines |
| GB490064A (en) * | 1936-02-18 | 1938-08-09 | Jean Benjamin Toustou | Process for improving solid carbonaceous fuels |
| GB497786A (en) * | 1937-03-25 | 1938-12-28 | Albert Leeds Stillman | Improvements in the treatment of solid or liquid fuel |
| GB540115A (en) * | 1940-04-26 | 1941-10-06 | Horace Morley | A solid fuel for fires and method of making same |
| GB569709A (en) * | 1943-09-10 | 1945-06-05 | George Jerome Luzzatto | Improvements in firelighters |
| GB574100A (en) * | 1944-01-01 | 1945-12-20 | Lionel Robert Littler Squire | Improvements in or relating to the manufacture of coal briquettes |
| GB650881A (en) * | 1948-10-26 | 1951-03-07 | C D Patents Ltd | Improvements in or relating to the treatment of carbonaceous slurries or sludges |
| GB669317A (en) * | 1948-11-18 | 1952-04-02 | C D Patents Ltd | The manufacture of moulded carbon products |
| GB754632A (en) * | 1953-10-26 | 1956-08-08 | Heinrich Burggraf | A method of agglomerating fine grained material |
| GB798828A (en) * | 1954-01-23 | 1958-07-30 | Briko Nv | A process for the manufacture of briquettes |
| GB896796A (en) * | 1958-05-27 | 1962-05-16 | Charbonnages De France | Improvements in or relating to processes for permanently fixing additives to solid fuels |
| GB956039A (en) * | 1960-06-03 | 1964-04-22 | Bergwerksverband Gmbh | Improvements in the treatment of powdered materials |
| GB1073285A (en) * | 1964-03-19 | 1967-06-21 | Bayer Ag | Method for binding finel-divided coal and the like and for consolidating heaps of particulate materials |
| GB1126784A (en) * | 1965-07-01 | 1968-09-11 | Centre Nat Rech Metall | Improvements in or relating to a method of manufacturing coke pellets |
| GB1189356A (en) * | 1967-07-13 | 1970-04-22 | Apollo Chem | Improvements in or relating to Fuel Compositions |
| GB1242202A (en) * | 1970-01-12 | 1971-08-11 | Bergwerksverband Gmbh | Improvements in or relating to shaped cokes |
| GB1349270A (en) * | 1971-02-26 | 1974-04-03 | Progil | Firelighter |
| GB1465936A (en) * | 1973-09-24 | 1977-03-02 | Crossmore E | Methods for forming agglomerate |
| GB1508712A (en) * | 1975-03-31 | 1978-04-26 | Battelle Memorial Institute | Treating solid fuel |
| GB1534099A (en) * | 1975-12-18 | 1978-11-29 | Technion Res & Dev Foundation | Lignosulphonate-based graft polymers their preparation and uses |
-
1982
- 1982-06-18 GB GB08217757A patent/GB2122218B/en not_active Expired
Patent Citations (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB247431A (en) * | 1925-04-29 | 1926-02-18 | Emile Marcel Eugene Frechou | Improvements in or relating to the manufacture of bodies for the purification of water |
| GB274876A (en) * | 1926-07-24 | 1928-04-26 | Koks- Und Halbkoks-Brikettierungs-Gesellschaft M.B.H. | |
| GB297085A (en) * | 1927-09-14 | 1929-08-08 | Aurele Louis Joseph Voinchet | A process for the manufacture of agglomerated blocks of fuel |
| GB394572A (en) * | 1932-11-19 | 1933-06-29 | Foster Dee Snell | Improvements in or relating to fuel briquettes and the manufacture thereof |
| GB469261A (en) * | 1935-10-12 | 1937-07-12 | Morton Smith | Improvements in the construction of machines |
| GB490064A (en) * | 1936-02-18 | 1938-08-09 | Jean Benjamin Toustou | Process for improving solid carbonaceous fuels |
| GB497786A (en) * | 1937-03-25 | 1938-12-28 | Albert Leeds Stillman | Improvements in the treatment of solid or liquid fuel |
| GB540115A (en) * | 1940-04-26 | 1941-10-06 | Horace Morley | A solid fuel for fires and method of making same |
| GB569709A (en) * | 1943-09-10 | 1945-06-05 | George Jerome Luzzatto | Improvements in firelighters |
| GB574100A (en) * | 1944-01-01 | 1945-12-20 | Lionel Robert Littler Squire | Improvements in or relating to the manufacture of coal briquettes |
| GB650881A (en) * | 1948-10-26 | 1951-03-07 | C D Patents Ltd | Improvements in or relating to the treatment of carbonaceous slurries or sludges |
| GB669317A (en) * | 1948-11-18 | 1952-04-02 | C D Patents Ltd | The manufacture of moulded carbon products |
| GB754632A (en) * | 1953-10-26 | 1956-08-08 | Heinrich Burggraf | A method of agglomerating fine grained material |
| GB798828A (en) * | 1954-01-23 | 1958-07-30 | Briko Nv | A process for the manufacture of briquettes |
| GB896796A (en) * | 1958-05-27 | 1962-05-16 | Charbonnages De France | Improvements in or relating to processes for permanently fixing additives to solid fuels |
| GB956039A (en) * | 1960-06-03 | 1964-04-22 | Bergwerksverband Gmbh | Improvements in the treatment of powdered materials |
| GB1073285A (en) * | 1964-03-19 | 1967-06-21 | Bayer Ag | Method for binding finel-divided coal and the like and for consolidating heaps of particulate materials |
| GB1126784A (en) * | 1965-07-01 | 1968-09-11 | Centre Nat Rech Metall | Improvements in or relating to a method of manufacturing coke pellets |
| GB1189356A (en) * | 1967-07-13 | 1970-04-22 | Apollo Chem | Improvements in or relating to Fuel Compositions |
| GB1242202A (en) * | 1970-01-12 | 1971-08-11 | Bergwerksverband Gmbh | Improvements in or relating to shaped cokes |
| GB1349270A (en) * | 1971-02-26 | 1974-04-03 | Progil | Firelighter |
| GB1465936A (en) * | 1973-09-24 | 1977-03-02 | Crossmore E | Methods for forming agglomerate |
| GB1508712A (en) * | 1975-03-31 | 1978-04-26 | Battelle Memorial Institute | Treating solid fuel |
| GB1534099A (en) * | 1975-12-18 | 1978-11-29 | Technion Res & Dev Foundation | Lignosulphonate-based graft polymers their preparation and uses |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4880858A (en) * | 1985-03-05 | 1989-11-14 | Allied Colloids Limited | Water absorbing polymers |
| EP0277017A2 (en) * | 1987-01-30 | 1988-08-03 | Ciba Specialty Chemicals Water Treatments Limited | Coal compositions and their production |
| EP0277017A3 (en) * | 1987-01-30 | 1989-01-25 | Ciba Specialty Chemicals Water Treatments Limited | Coal compositions and their production |
| AU596055B2 (en) * | 1987-01-30 | 1990-04-12 | Allied Colloids Limited | Coal compositions and their production |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2122218B (en) | 1986-03-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |