CA2848068C - Treatment of coal - Google Patents
Treatment of coal Download PDFInfo
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- CA2848068C CA2848068C CA2848068A CA2848068A CA2848068C CA 2848068 C CA2848068 C CA 2848068C CA 2848068 A CA2848068 A CA 2848068A CA 2848068 A CA2848068 A CA 2848068A CA 2848068 C CA2848068 C CA 2848068C
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- Prior art keywords
- coal
- demoisturized
- feeding
- devolatilized
- volatile material
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- 239000003245 coal Substances 0.000 title claims abstract description 125
- 238000000034 method Methods 0.000 claims abstract description 28
- 239000000463 material Substances 0.000 claims abstract description 27
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 238000007654 immersion Methods 0.000 claims description 3
- 239000011230 binding agent Substances 0.000 claims 4
- 239000000446 fuel Substances 0.000 description 8
- 239000003077 lignite Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Chemical compound C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000011269 tar Substances 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- 239000003039 volatile agent Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/26—After-treatment of the shaped fuels, e.g. briquettes
- C10L5/32—Coating
-
- 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
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/06—Methods of shaping, e.g. pelletizing or briquetting
- C10L5/08—Methods of shaping, e.g. pelletizing or briquetting without the aid of extraneous binders
-
- 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
- C10L9/08—Treating solid fuels to improve their combustion by heat treatments, e.g. calcining
-
- 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
-
- 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
- C10L2230/00—Function and purpose of a components of a fuel or the composition as a whole
- C10L2230/14—Function and purpose of a components of a fuel or the composition as a whole for improving storage or transport of the fuel
-
- 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
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/02—Combustion or pyrolysis
-
- 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
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/06—Heat exchange, direct or indirect
-
- 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
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/08—Drying or removing water
-
- 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
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/20—Coating of a fuel as a whole or of a fuel component
-
- 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
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- Chemical & Material Sciences (AREA)
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- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
Process for treating coal by feeding a first batch of raw coal to a first dryer to remove moisture contained in the raw coal to produce demoisturized coal; feeding the demoisturized coal to a devolatilizer to remove volatile material from the demoisturized coal to produce devolatilized coal; feeding a first portion of the devolatilized coal to a combustor to provide heat for the process; feeding a second portion of the devolatilized coal to a coater; feeding a second batch of raw coal to a slave dryer to produce a second batch of demoisturized coal; feeding the second batch of demoisturized coal to the coater where the second portion of devolatilized coal and the second batch of demoisturized coal are coated with volatile material produced in the devolatilizer, to produce a stabilized coal product; and collecting the stabilized coal product.
Description
2 PCT/US2012/054160 TREATMENT OF COAL
TECHNICAL FIELD
The present invention relates to the treatment of coal. More particularly, the present invention provides a process for treating coal by removing moisture only and to produce a stable fuel product, increasing the heating value of the fuel product, and stabilizing the product to prevent re-absorption of moisture, degradation, and spontaneous combustion.
BACKGROUND OF THE INVENTION
Prior processes for treating coal remove moisture and unwanted volatile matter from the coal (typically low-rank coals and lignite) to produce coal of higher quality, with increased heat release per unit mass of fuel. For example, U.S patents 6,447,559 and 7,879,117 describe processes for producing a clean coal fuel that has a higher heating value per unit mass of coal compared to the raw coal. The clean coal fuel also produces zero or minimal emissions. The volatile matter removed from the raw coal is used as a fuel to provide process heat.
The prior processes remove both moisture and volatile matter in several (2-4) different stages. Typically, the first stage removes only moisture from the coal, while the remaining stages remove volatile matter as light and heavy hydrocarbons. However, the removal of only moisture from coal is not as simple as removing, from the prior process, the latter stages that remove volatile matter.
Moreover, removal of moisture only from low-rank coal and lignite is known to produce an unstable coal fuel that can spontaneously ignite, disintegrate into a powder, and re-absorb moisture. These undesirable properties limit the shelf life of the de-moisturized coal.
To date, no one has successfully developed a process that can remove moisture only from low-rank coal and lignite and produce a stable product.
Furthermore, because no volatiles are removed from the coal, there is no internally produced fuel to meet the heat demands of the process.
Consequently, an external source of heat is required if the prior processes are to be modified to only remove moisture from low rank coals and lignite. The provision of heat from an external source adds to the capital and operating costs of such processes SUMMARY OF THE INVENTION
It has now been discovered, according to the present invention, that it is possible to treat coal is such a way as to remove only the moisture and yet produce a stable product with increased heating values per unit mass compared with the feed coal. . According to a first aspect, there is provided a process for treating coal comprising the steps of:
feeding a first batch of raw coal to a first dryer to remove moisture contained in the raw coal to produce a first demoisturized coal;
feeding the first demoisturized coal to a devolatilizer to remove volatile material from the first demoisturized coal to produce a devolatilized coal;
feeding a first portion of the devolatilized coal to a combustor to provide heat for the process;
feeding a second batch of raw coal to a slave dryer to produce a second demoisturized coal;
feeding the second demoisturized coal to the caster where the second portion of the devolatilized coal and the second demoisturized coal are coated with volatile material produced in the devolatilizer, to produce a stabilized coal product; and cooling and collecting the stabilized coal product.
In a further aspect there is provided treated coal produced according to the process of the invention.
In another aspect, the invention provides briquettes formed from coal treated according to the process of the invention. The briquettes may be provided with a waterproof coating to improve stability, ignition properties and to extend shelf life.
BRIEF DESCRIPTION OF THE DRAWING
Embodiments of the invention will now be described in more detail with reference to the accompanying Figure which is a flow diagram of the process of the invention.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
, Referring to the Figure, there is shown a flow diagram of the present invention. In the Figure, the flow rates shown correspond to a plant processing 180 tons per hour (tph) of raw coal, of which a portion, 30 tph (i.e., "the first batch"), is used for providing heat for the process. It will be understood that the process of the invention is not limited to those particular feed rates.
The apparatus employed in the process of the invention includes a master dryer 2, a devolatilizer 4, a combuster 6, a series of slave dryers 8, 10, 12, 14 and 16 and a series of coaters 18, 20, 22, 24 and 26. A first batch of raw coal (30 tph) is fed to the master dryer 2 to remove moisture contained in the raw coal. The term "remove moisture", as used herein, means that the content of moisture (water) in the coal is reduced to less than 5% by weight, for example 2-4% by weight.
The resulting demoisturized product is then fed to the devolatilizer 4 to remove volatile material in the coal. The term "remove volatile material", as used herein, means that the content of volatile material in the coal is reduced to less than 5% by weight, for example 2-4% by weight. These two steps of moisture removal and volatile material removal are accomplished as in US
Patent No. 6,447,559 in one unit operation.
The coal exiting the devolatilizer (17.6 tph) is split into two streams.
The first stream (6.1 tph) is fed to combustor 6 where heat generated is fed to the master dryer 2, the devolatilizer 4 and the slave dryers 8, 10, 12, 14, and 16.
A second batch of raw coal is fed directly to the respective slave dryers 8, 10, 12, 14, 16 where the coal dried to a moisture level of about 5wt%. The slave dryers 8-16 are heated with heat from the combustor 6 to remove only moisture from the incoming second batch of coal.
TECHNICAL FIELD
The present invention relates to the treatment of coal. More particularly, the present invention provides a process for treating coal by removing moisture only and to produce a stable fuel product, increasing the heating value of the fuel product, and stabilizing the product to prevent re-absorption of moisture, degradation, and spontaneous combustion.
BACKGROUND OF THE INVENTION
Prior processes for treating coal remove moisture and unwanted volatile matter from the coal (typically low-rank coals and lignite) to produce coal of higher quality, with increased heat release per unit mass of fuel. For example, U.S patents 6,447,559 and 7,879,117 describe processes for producing a clean coal fuel that has a higher heating value per unit mass of coal compared to the raw coal. The clean coal fuel also produces zero or minimal emissions. The volatile matter removed from the raw coal is used as a fuel to provide process heat.
The prior processes remove both moisture and volatile matter in several (2-4) different stages. Typically, the first stage removes only moisture from the coal, while the remaining stages remove volatile matter as light and heavy hydrocarbons. However, the removal of only moisture from coal is not as simple as removing, from the prior process, the latter stages that remove volatile matter.
Moreover, removal of moisture only from low-rank coal and lignite is known to produce an unstable coal fuel that can spontaneously ignite, disintegrate into a powder, and re-absorb moisture. These undesirable properties limit the shelf life of the de-moisturized coal.
To date, no one has successfully developed a process that can remove moisture only from low-rank coal and lignite and produce a stable product.
Furthermore, because no volatiles are removed from the coal, there is no internally produced fuel to meet the heat demands of the process.
Consequently, an external source of heat is required if the prior processes are to be modified to only remove moisture from low rank coals and lignite. The provision of heat from an external source adds to the capital and operating costs of such processes SUMMARY OF THE INVENTION
It has now been discovered, according to the present invention, that it is possible to treat coal is such a way as to remove only the moisture and yet produce a stable product with increased heating values per unit mass compared with the feed coal. . According to a first aspect, there is provided a process for treating coal comprising the steps of:
feeding a first batch of raw coal to a first dryer to remove moisture contained in the raw coal to produce a first demoisturized coal;
feeding the first demoisturized coal to a devolatilizer to remove volatile material from the first demoisturized coal to produce a devolatilized coal;
feeding a first portion of the devolatilized coal to a combustor to provide heat for the process;
feeding a second batch of raw coal to a slave dryer to produce a second demoisturized coal;
feeding the second demoisturized coal to the caster where the second portion of the devolatilized coal and the second demoisturized coal are coated with volatile material produced in the devolatilizer, to produce a stabilized coal product; and cooling and collecting the stabilized coal product.
In a further aspect there is provided treated coal produced according to the process of the invention.
In another aspect, the invention provides briquettes formed from coal treated according to the process of the invention. The briquettes may be provided with a waterproof coating to improve stability, ignition properties and to extend shelf life.
BRIEF DESCRIPTION OF THE DRAWING
Embodiments of the invention will now be described in more detail with reference to the accompanying Figure which is a flow diagram of the process of the invention.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
, Referring to the Figure, there is shown a flow diagram of the present invention. In the Figure, the flow rates shown correspond to a plant processing 180 tons per hour (tph) of raw coal, of which a portion, 30 tph (i.e., "the first batch"), is used for providing heat for the process. It will be understood that the process of the invention is not limited to those particular feed rates.
The apparatus employed in the process of the invention includes a master dryer 2, a devolatilizer 4, a combuster 6, a series of slave dryers 8, 10, 12, 14 and 16 and a series of coaters 18, 20, 22, 24 and 26. A first batch of raw coal (30 tph) is fed to the master dryer 2 to remove moisture contained in the raw coal. The term "remove moisture", as used herein, means that the content of moisture (water) in the coal is reduced to less than 5% by weight, for example 2-4% by weight.
The resulting demoisturized product is then fed to the devolatilizer 4 to remove volatile material in the coal. The term "remove volatile material", as used herein, means that the content of volatile material in the coal is reduced to less than 5% by weight, for example 2-4% by weight. These two steps of moisture removal and volatile material removal are accomplished as in US
Patent No. 6,447,559 in one unit operation.
The coal exiting the devolatilizer (17.6 tph) is split into two streams.
The first stream (6.1 tph) is fed to combustor 6 where heat generated is fed to the master dryer 2, the devolatilizer 4 and the slave dryers 8, 10, 12, 14, and 16.
A second batch of raw coal is fed directly to the respective slave dryers 8, 10, 12, 14, 16 where the coal dried to a moisture level of about 5wt%. The slave dryers 8-16 are heated with heat from the combustor 6 to remove only moisture from the incoming second batch of coal.
3 As simple moisture removal produces an unstable coal product, the demoisturized coal from each of the slave dryers is passed through respective coaters 18, 20, 22, 24, 26, where it is mixed with the remainder (11.5 tph) of the first batch of raw coal that has been demoisturized and devolatilized in the master dryer 2 and devolatilizer 4, respectively. The coaters may be heated using heat from the combustor 6, if needed. Volatile material produced by the devolatilizer 4 is fed to the respective coaters to coat the coal and thereby produce a stabilized coal, which is then collected from the coaters.
An important feature of the invention is coating of the demoisturized coal produced by the respective slave dryers in a separate operation using volatile material withdrawn from the coal in the devolatilizer 4. The application of the volatile material onto the demoisturized coal in the coaters may be effected, for example, by immersion of the demoisturized coal in volatile material condensate or by allowing vapors from the volatile material to condense on the surface of the demoisturized coal.
The volatile material condensate from the devolatilizer 4 contains tars, anthracene oils, and other coal derivatives. Coating the demoisturized coal in the coaters with this volatile material condensate is believed to seal the pore structure of the coal and prevent it from reabsorbing moisture, disintegrating into a powder, and/or undergoing spontaneous self-ignition and combustion.
While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, and is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
An important feature of the invention is coating of the demoisturized coal produced by the respective slave dryers in a separate operation using volatile material withdrawn from the coal in the devolatilizer 4. The application of the volatile material onto the demoisturized coal in the coaters may be effected, for example, by immersion of the demoisturized coal in volatile material condensate or by allowing vapors from the volatile material to condense on the surface of the demoisturized coal.
The volatile material condensate from the devolatilizer 4 contains tars, anthracene oils, and other coal derivatives. Coating the demoisturized coal in the coaters with this volatile material condensate is believed to seal the pore structure of the coal and prevent it from reabsorbing moisture, disintegrating into a powder, and/or undergoing spontaneous self-ignition and combustion.
While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, and is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
4
Claims (12)
1. A process for treating coal comprising the steps of:
feeding a first batch of raw coal to a first dryer to remove moisture contained in the raw coal to produce a first demoisturized coal;
feeding the first demoisturized coal to a devolatilizer to remove volatile material from the first demoisturized coal to produce a devolatilized coal;
feeding a first portion of the devolatilized coal to a combustor to provide heat for the process;
feeding a second portion of the devolatilized coal to a coater;
feeding a second batch of raw coal to a slave dryer to produce a second demoisturized coal;
feeding the second demoisturized coal to said coater where the second portion of the devolatilized coal and the second demoisturized coal are coated with volatile material produced in the devolatilizer, to produce a stabilized coal product; and collecting the stabilized coal product, wherein the volatile material is applied to the second portion of the devolatilized coal and the second demoisturized coal by immersion in condensed volatile material while the coater is heated by using heat from the combustor.
feeding a first batch of raw coal to a first dryer to remove moisture contained in the raw coal to produce a first demoisturized coal;
feeding the first demoisturized coal to a devolatilizer to remove volatile material from the first demoisturized coal to produce a devolatilized coal;
feeding a first portion of the devolatilized coal to a combustor to provide heat for the process;
feeding a second portion of the devolatilized coal to a coater;
feeding a second batch of raw coal to a slave dryer to produce a second demoisturized coal;
feeding the second demoisturized coal to said coater where the second portion of the devolatilized coal and the second demoisturized coal are coated with volatile material produced in the devolatilizer, to produce a stabilized coal product; and collecting the stabilized coal product, wherein the volatile material is applied to the second portion of the devolatilized coal and the second demoisturized coal by immersion in condensed volatile material while the coater is heated by using heat from the combustor.
2. The process according to claim 1 wherein the volatile material is applied to the second portion of the devolatilized coal and the second demoisturized coal by immersion in condensed volatile material.
3. The process according to claim 1 wherein the volatile material is applied to the second portion of the devolatilized coal and the second demoisturized coal by condensing vapor of volatile material on the surface of the coal.
4. Treated coal produced according to the process of claim 1.
Date Recue/Date Received 2020-07-08
Date Recue/Date Received 2020-07-08
5. Treated coal according to claim 4, provided with a waterproof binder/igniter/coating.
6. Treated coal according to claim 4 in the form of briquettes.
7. Briquettes according to claim 6 provided with a water-proof binder/igniter/coating.
8. A process for treating coal comprising the steps of:
feeding a first batch of raw coal to a first dryer to remove moisture contained in the raw coal to produce a first demoisturized coal;
feeding the first demoisturized coal to a devolatilizer to remove volatile material from the first demoisturized coal to produce a devolatilized coal;
feeding a first portion of the devolatilized coal to a combustor to provide heat for the process;
feeding a second portion of the devolatilized coal to a coater;
feeding a second batch of raw coal to a slave dryer to produce a second demoisturized coal;
feeding the second demoisturized coal to said coater where the second portion of the devolatilized coal and the second demoisturized coal are coated with volatile material produced in the devolatilizer, to produce a stabilized coal product; and collecting the stabilized coal product, wherein the volatile material is applied to the second portion of the devolatilized coal and the second demoisturized coal by condensing vapor of volatile material on the surface of the coal while the coater is heated by using heat from the combustor.
feeding a first batch of raw coal to a first dryer to remove moisture contained in the raw coal to produce a first demoisturized coal;
feeding the first demoisturized coal to a devolatilizer to remove volatile material from the first demoisturized coal to produce a devolatilized coal;
feeding a first portion of the devolatilized coal to a combustor to provide heat for the process;
feeding a second portion of the devolatilized coal to a coater;
feeding a second batch of raw coal to a slave dryer to produce a second demoisturized coal;
feeding the second demoisturized coal to said coater where the second portion of the devolatilized coal and the second demoisturized coal are coated with volatile material produced in the devolatilizer, to produce a stabilized coal product; and collecting the stabilized coal product, wherein the volatile material is applied to the second portion of the devolatilized coal and the second demoisturized coal by condensing vapor of volatile material on the surface of the coal while the coater is heated by using heat from the combustor.
9. Treated coal produced according to the process of claim 8.
10. Treated coal according to claim 9, provided with a waterproof binder/igniter/coating.
Date Recue/Date Received 2020-07-08
Date Recue/Date Received 2020-07-08
11. Treated coal according to claim 9 in the form of briquettes.
12. Briquettes according to claim 11 provided with a waterproof binder/igniter/coating.
Date Recue/Date Received 2020-07-08
Date Recue/Date Received 2020-07-08
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201161531791P | 2011-09-07 | 2011-09-07 | |
| US61/531,791 | 2011-09-07 | ||
| PCT/US2012/054160 WO2013066492A2 (en) | 2011-09-07 | 2012-09-07 | Treatment of coal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2848068A1 CA2848068A1 (en) | 2013-05-10 |
| CA2848068C true CA2848068C (en) | 2021-07-20 |
Family
ID=48192993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2848068A Expired - Fee Related CA2848068C (en) | 2011-09-07 | 2012-09-07 | Treatment of coal |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US20150166917A1 (en) |
| EP (1) | EP2753678A4 (en) |
| JP (1) | JP6256919B2 (en) |
| KR (1) | KR101966481B1 (en) |
| AU (1) | AU2012333101B2 (en) |
| CA (1) | CA2848068C (en) |
| CO (1) | CO7010817A2 (en) |
| EA (1) | EA027270B1 (en) |
| HK (1) | HK1199737A1 (en) |
| MX (1) | MX359966B (en) |
| MY (1) | MY172294A (en) |
| WO (1) | WO2013066492A2 (en) |
| ZA (1) | ZA201402154B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3004289A4 (en) | 2013-05-30 | 2017-01-18 | Clean Coal Technologies, Inc. | Treatment of coal |
| CN107189834B (en) * | 2017-07-10 | 2023-08-15 | 自贡通达机器制造有限公司 | Steam curing kettle body and steam curing method |
| WO2020172319A1 (en) * | 2019-02-19 | 2020-08-27 | Omnis Advanced Technologies (Hk) Ltd. | Thermal fracture and microcarbon separation of coal particles |
| CN110003965B (en) * | 2019-05-09 | 2021-04-20 | 中南大学 | Method for preparing superfine clean coal by combining ball milling pretreatment and chemical method |
| KR20230066823A (en) * | 2021-11-08 | 2023-05-16 | 주식회사 선진티에스 | Combined coal dryer system capable of removing contaminant |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2816013A (en) * | 1955-04-11 | 1957-12-10 | Tamwell Entpr | Impregnated and coated fuel body and method |
| US3018227A (en) * | 1957-01-22 | 1962-01-23 | Consolidation Coal Co | Preparation of formcoke |
| US4039392A (en) * | 1973-10-04 | 1977-08-02 | Singh Alamjit D | Process and apparatus for producing char and co-products from coal and the like |
| US4245395A (en) * | 1974-10-02 | 1981-01-20 | Monash University | Fluidized bed drying |
| US4097245A (en) * | 1976-03-01 | 1978-06-27 | Inland Steel Company | Method for producing carbonaceous material |
| JPS56155295A (en) * | 1980-05-02 | 1981-12-01 | Mitsubishi Heavy Ind Ltd | Treatment of coal |
| US4342622A (en) * | 1980-05-08 | 1982-08-03 | Inland Steel Company | Process for making formed coke from high sulfur coal |
| JPS5918796A (en) * | 1982-07-21 | 1984-01-31 | Hitachi Ltd | Modification of coal |
| JPS60156794A (en) * | 1984-01-25 | 1985-08-16 | Hitachi Ltd | Conversion of low-grade coal into slurry |
| JPS60195185A (en) * | 1984-03-19 | 1985-10-03 | Hitachi Ltd | Upgrading of low-grade coal |
| US4605421A (en) * | 1984-09-10 | 1986-08-12 | Kerr-Mcgee Chemical Corporation | Process for the preparation of a carbonaceous-derived solid fuel product |
| JPS61171797A (en) * | 1985-01-25 | 1986-08-02 | Hitachi Ltd | Method for improving quality of low-grade coal |
| JP3941131B2 (en) * | 1996-05-21 | 2007-07-04 | 宇部興産株式会社 | Modified coal production method, CWM and production method thereof, and H2 and CO production method |
| TR200201914T2 (en) | 1999-11-05 | 2002-11-21 | Saudi American Minerals, Inc. | Treatment of coal |
| JP2009191085A (en) * | 2008-02-12 | 2009-08-27 | Mhi Environment Engineering Co Ltd | Method and system for manufacturing solid fuel, and solid fuel |
| JP4580011B2 (en) * | 2008-10-09 | 2010-11-10 | 株式会社神戸製鋼所 | Solid fuel production method and solid fuel produced by the production method |
-
2012
- 2012-09-07 AU AU2012333101A patent/AU2012333101B2/en not_active Ceased
- 2012-09-07 CA CA2848068A patent/CA2848068C/en not_active Expired - Fee Related
- 2012-09-07 MY MYPI2014000646A patent/MY172294A/en unknown
- 2012-09-07 US US14/343,568 patent/US20150166917A1/en not_active Abandoned
- 2012-09-07 KR KR1020147008281A patent/KR101966481B1/en active IP Right Grant
- 2012-09-07 EA EA201490565A patent/EA027270B1/en not_active IP Right Cessation
- 2012-09-07 MX MX2014002717A patent/MX359966B/en active IP Right Grant
- 2012-09-07 EP EP12845210.9A patent/EP2753678A4/en not_active Withdrawn
- 2012-09-07 JP JP2014529896A patent/JP6256919B2/en not_active Expired - Fee Related
- 2012-09-07 WO PCT/US2012/054160 patent/WO2013066492A2/en active Application Filing
-
2014
- 2014-03-24 ZA ZA2014/02154A patent/ZA201402154B/en unknown
- 2014-04-01 CO CO14068729A patent/CO7010817A2/en unknown
-
2015
- 2015-01-07 HK HK15100135.9A patent/HK1199737A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| EA201490565A1 (en) | 2014-07-30 |
| AU2012333101A1 (en) | 2014-04-17 |
| CA2848068A1 (en) | 2013-05-10 |
| HK1199737A1 (en) | 2015-07-17 |
| WO2013066492A2 (en) | 2013-05-10 |
| WO2013066492A9 (en) | 2013-11-28 |
| EP2753678A2 (en) | 2014-07-16 |
| AU2012333101B2 (en) | 2016-07-14 |
| CO7010817A2 (en) | 2014-07-31 |
| JP2014525514A (en) | 2014-09-29 |
| JP6256919B2 (en) | 2018-01-10 |
| WO2013066492A3 (en) | 2013-08-15 |
| MX359966B (en) | 2018-10-18 |
| EP2753678A4 (en) | 2015-04-08 |
| ZA201402154B (en) | 2017-06-28 |
| MX2014002717A (en) | 2014-08-01 |
| EA027270B1 (en) | 2017-07-31 |
| US20150166917A1 (en) | 2015-06-18 |
| KR20140072066A (en) | 2014-06-12 |
| MY172294A (en) | 2019-11-20 |
| KR101966481B1 (en) | 2019-04-05 |
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Legal Events
| Date | Code | Title | Description |
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| EEER | Examination request |
Effective date: 20170830 |
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| MKLA | Lapsed |
Effective date: 20220907 |