CN1023489C - Process for inhibiting the spontaneous oxidation of low rank coal - Google Patents
Process for inhibiting the spontaneous oxidation of low rank coal Download PDFInfo
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- CN1023489C CN1023489C CN 88103998 CN88103998A CN1023489C CN 1023489 C CN1023489 C CN 1023489C CN 88103998 CN88103998 CN 88103998 CN 88103998 A CN88103998 A CN 88103998A CN 1023489 C CN1023489 C CN 1023489C
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- coal
- oxygenant
- oxidizing agent
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- agent solution
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- 239000003245 coal Substances 0.000 title claims abstract description 127
- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000003647 oxidation Effects 0.000 title claims description 20
- 238000007254 oxidation reaction Methods 0.000 title claims description 20
- 230000002269 spontaneous effect Effects 0.000 title claims description 10
- 230000008569 process Effects 0.000 title claims description 9
- 230000002401 inhibitory effect Effects 0.000 title description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000007800 oxidant agent Substances 0.000 claims abstract description 19
- 238000002485 combustion reaction Methods 0.000 claims abstract description 8
- 239000000243 solution Substances 0.000 claims description 24
- 238000001035 drying Methods 0.000 claims description 16
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 10
- 230000004927 fusion Effects 0.000 claims description 8
- 239000007921 spray Substances 0.000 claims description 8
- 239000007864 aqueous solution Substances 0.000 claims description 7
- 229910002651 NO3 Inorganic materials 0.000 claims description 3
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 3
- 235000019628 coolness Nutrition 0.000 claims description 2
- VLTRZXGMWDSKGL-UHFFFAOYSA-M perchlorate Inorganic materials [O-]Cl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-M 0.000 claims description 2
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 claims description 2
- GDDNTTHUKVNJRA-UHFFFAOYSA-N 3-bromo-3,3-difluoroprop-1-ene Chemical group FC(F)(Br)C=C GDDNTTHUKVNJRA-UHFFFAOYSA-N 0.000 claims 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 15
- 239000001301 oxygen Substances 0.000 abstract description 15
- 229910052760 oxygen Inorganic materials 0.000 abstract description 15
- 230000001590 oxidative effect Effects 0.000 abstract description 5
- 238000005507 spraying Methods 0.000 abstract description 4
- 239000000523 sample Substances 0.000 description 12
- 239000000047 product Substances 0.000 description 6
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 5
- 229910001882 dioxygen Inorganic materials 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 239000012153 distilled water Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- MPCRDALPQLDDFX-UHFFFAOYSA-L Magnesium perchlorate Chemical compound [Mg+2].[O-]Cl(=O)(=O)=O.[O-]Cl(=O)(=O)=O MPCRDALPQLDDFX-UHFFFAOYSA-L 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 238000009533 lab test Methods 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- 238000005502 peroxidation Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 2
- 239000003570 air Substances 0.000 description 2
- 239000013068 control sample Substances 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 238000001291 vacuum drying Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- OUUQCZGPVNCOIJ-UHFFFAOYSA-M Superoxide Chemical compound [O-][O] OUUQCZGPVNCOIJ-UHFFFAOYSA-M 0.000 description 1
- DPDMMXDBJGCCQC-UHFFFAOYSA-N [Na].[Cl] Chemical compound [Na].[Cl] DPDMMXDBJGCCQC-UHFFFAOYSA-N 0.000 description 1
- 231100000987 absorbed dose Toxicity 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical group OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000003250 coal slurry Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 125000000623 heterocyclic group Chemical group 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000000852 hydrogen donor Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000036284 oxygen consumption Effects 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010129 solution processing Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000003476 subbituminous coal Substances 0.000 description 1
- 230000036962 time dependent Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The present invention discloses a method for reducing the self-combustion trend of low metamorphic coal, which comprises the following steps that oxidant water solution containing fixed oxygen is used for spraying coal, and then the coal treated in the way is dried. The dry coal is cooled.
Description
The present invention relates to stop the method for low metamorphic grade coal spontaneous combustion, promptly in addition dry in oxidation of coal, cooling again is so that increase its stability.
Designed many treatment processs and made oxidation of coal, to reduce the content of its sulphur and ash.For example, US-A-3,909,211 have narrated with a kind of NO of containing
2Gas under 38-260 ℃, add hot coal.US-A-4,022,588 has narrated coal and reactive metal oxide that some are specific, then the coal of handling is washed or extracting.US-A-4,097,244 and US-A-4,105,416 have narrated with the aqueous solution that contains a kind of iron-retention agent and a kind of burning agent and have handled coal, and the coal of handling like this and hydrogen donor are reacted.US-A-4,183,730 have narrated the aqueous solution of coal and hydrogen peroxide and sodium-chlor are reacted, and wash the coal of this processing then.United States Patent (USP) 4,256,464 have narrated coal are contacted with a kind of liquid organic solvent of nitrogen-containing oxide, make it then and contain aerobic and nitric oxide production gas reaction.US-A-4,328,002 have narrated with a kind of aqueous oxidizing agent solution processing coal, wash coal then, again itself and oxygen are reacted to the degree that produces the exothermic temperature peak, washing at last and dry this coal of handling.
Also having proposed some method for oxidation reduces the molecular weight of coal and/or part of coal is dissolved in the organic solvent.US-A-2,242,822 and US-A-2,338,634 have set forth the first air of using, back nitric acid oxidation coal, so that generate some hydroxycarboxylic acid groups, non-fusain organic substance is become dissolve in the organic solvent that contains heterocycle oxygen, adopt ammonium nitrate or other oxide compound as catalyzer at oxidation stage.
Known have several method to make oxidation of coal stop the low metamorphic grade coal spontaneous combustion with the oxidizing reaction that reduces it.Also can contact the spontaneous combustion that stops coal with coal particle surface by restriction oxygen, for example, by compacting so that minimizing air infiltration is gone in the dump and/or coal supply is coated a kind of material that oxygen enters the coal surface that limits.It is that coal particle is exposed in the molecular oxygen that nearest used some make the method for oxidation of coal.For example, US-A-3,723,079 have narrated a kind of coal treatment process, make coal be dried to water content 1-10% with atmospheric oxidation (0.5-8% oxygen absorbed dose can be provided) in coal earlier, then coal aquation again.US-A-4,396,394 and US-A, 4,401,436 have narrated and coal are dried to approach the desired humidity of product, and make oxidation of coal by oxygen containing rising hot gas flow, the coal that to handle is cooled to be lower than about 38 ℃ or the time add water in cooling again, so that increase rate of cooling by evaporation of water.The speed that the stabilization that these methods provided is based on oxidizing reaction reduces along with the oxidation of coal.
Method provided by the invention is the coal drying with low metamorphic grade, oxidation and cooling, so that reduce its spontaneous combustion tendency, it is characterized in that, spray coal particle with the aqueous oxidizing agent solution that contains fixed oxygen, make this aqueous solution be evenly distributed in coal particle surface substantially, the add-on of water be not more than coal heavy 10%; Coal particle is heated to the highest 204 ℃ from envrionment temperature, makes the wet coal of gained be dried to moisture content and be reduced to the required degree of product of coal basically; Then the coal of handling like this is cooled to below 38 ℃.
Spray the water yield that aqueous oxidizing agent solution added and be preferably less than 2% of coal weight.With oxidized dose of wetting coal heat drying, make moisture content drop to the required degree of product of coal basically.Control Heating temperature, make the coal particle temperature be up to 204 ℃, preferably be up to 149 ℃, most preferably do not exceed 121 ℃, such as between 66 and 121 ℃.Can be at low temperature such as add hot coal from 38 ℃ to 66 ℃, but this is not preferred.The coal that drying is crossed is cooled to below 38 ℃ at last.
In the preferred embodiment, screen is divided into thicker part branch and partly thin.Then aqueous oxidizing agent solution is added to respectively than rough coal grain part with than duff grain part, perhaps only is added to partly than the duff grain.Spraying the partly dry of peroxidation agent, partly mix again then with than the rough coal grain than the duff grain.In a particularly preferred embodiment, heat, that spray the peroxidation agent but dry duff with spray the peroxidation agent than the partly fusion of rough coal grain, then that this fusion is good coal charge cooling.
In the method for the invention, make coal by contacting and oxidized with aqueous oxidizing agent solution, the oxygen in the oxygenant is different with molecular oxygen, and it exists with the chemical combination form.In general, oxygenant can be basically any gentle relatively, have quite water miscible, an oxygen containing oxygenant.This oxygenant preferably is in the aqueous solution of suitable high density, preferably makes the saturated basically concentration of solution.Shi Yi oxygenant comprises perchlorate especially, oxymuriate, and superoxide, hypochlorite or nitrate, and be suitable for and do aqueous solution usefulness, positively charged ion is made up of ion of metal, hydrogen or ammonium etc. in the solution.Coal contacts with aqueous oxidizing agent solution, be to allow the surface of coal touch oxygenant liquid substantially equably, and do not need Special Equipment resemble the oxidation container, and to avoid that water content surpasses 10% of coal weight in the coal of contacted aqueous oxidizing agent solution, preferably be not more than 2% of coal weight.
In a preferred embodiment, oxidizing agent solution is sprayed on the coal with drop or belt-like form, and this solution will approach saturatedly, makes the water yield reach minimum and don't can make oxygenant sedimentary degree occur.If necessary, oxidizing agent solution can be heated, and can adopt general nozzle or spraying gun.
In the method for the invention, be before coal is carried out drying, aqueous oxidizing agent solution to be contacted with coal.Water-soluble oxidizers is diffused in the water, oxygenant be may reside in the coal and the surface of coal on, and penetrate into the internal surface of coal.Before in moisture eliminator, heating and evaporating, do that like this oxidizing reaction is accelerated under the high temperature of moisture eliminator, and owing to the evaporation of moisture content concentrates oxygenant.If necessary, for example when adopt a kind of quite low expense and/or relatively during inactive oxygenant, coal leaves moisture eliminator after with enter before the water cooler, added oxidizing agent solution in the coal in the past.
Laboratory test (magnesium perchlorate)
In order to do these tests, the even division of (U.S.) western sub-bituminous coals is become the aliquots containig of two parts of each 1000 grams.This coal sample is taken from the basin, southern Powder river of (U.S.) Wyoming State.Be made into slurry with a five equilibrium coal sample and 1000ml distilled water, make a undressed control sample.Make a treated coal sample with the solution that contains 10 gram magnesium perchlorates in another even five equilibrium coal sample and the 1000ml distilled water, the amount that makes magnesium perchlorate is 1.4% of a dry coal weight.All be placed in the vacuum drying oven with purging with nitrogen gas crossed in 105-110 ℃ following dry 48 hour with undressed sample treated.Dried coal sample is placed in the isothermal reactor, passes through this reactor with one stable airflow, and measures the consumption of oxygen as the function of time.
The initial oxygen consumption rate of treated coal sample only is about 50% of a undressed coal sample.On natural logarithm figure, rate of oxidation shows that with the variation of accumulation amount of oxidation (or integration of previous amount of oxidation) influence of oxygenant roughly is similar to the influence of molecular oxygen, and promptly initial oxidation speed has lowered; This influence also shows, utilizes the oxygenant that contains fixed oxygen rather than molecular oxygen can cause the oxidation of giving of coal, can prevent like this, or the oxygenant that can postpone spontaneous combustion-usefulness fixed oxygen subsequently at least is really to a certain extent than with the easier realization this point of molecular oxygen.In addition, because water-soluble oxidizers is that to be sprayed to the coal grain lip-deep, this oxygenant can be by original moisture content in the coal, in tiny gap and in the micropore and move freely on their perisporiums, contacts with the coal surface.
The validity that is dissolved in the water-soluble oxidizers in the coal slurry means that method of the present invention can handle coal in coal/water slurry of carrying with pipeline, therefore can alleviate storage problem and handling problem at the pipeline receiving terminal.
Laboratory test (ammonium nitrate)
With about 1000 grams wet, make slurry by the sub-bituminous coal of receiving with 1000ml ammonium nitrate distilled water solution, as a treated coal sample.The uniformly wet coal of about 1000 grams is made undressed control sample in the pure distilled water of 1000ml.Then these two kinds of samples are placed in the vacuum drying oven of crossing with purging with nitrogen gas following dry 48 hours in 100-105 ℃.And detect the time dependent isothermal oxygen absorbed of these two kinds of samples.Ammonium nitrate has reduced the speed of moisture-free coal absorption oxygen.When the concentration of ammonium nitrate be moisture-free coal weight 0.7% and 1.4% the time, can be observed significant reduction.
Needs with the withering situation of whole coals under, a kind of preferably treatment technology of low rank coal is, spray wet raw coal with aqueous oxidizing agent solution, then this wet coal is delivered to moisture eliminator, carry out drying, send into particle collector from the waste gas that moisture eliminator is discharged with a kind of hot drying gas, deliver to water cooler from the hot dry coal that moisture eliminator comes out, cooled off with for example ambient air, deliver to particle collector from the waste gas that water cooler is discharged, the dump that this refrigerative, drying are handled stores away.This operation of spraying operation is similar to the pulping process of above-mentioned laboratory test substantially.
Another particularly preferred technology is, the system screen is divided into thicker and thinner two parts, each partly sprays with aqueous oxidizing agent solution respectively, single duff grain drying in addition partly that will be treated, again the treated coal fusion again of this two part, then this adulterant is delivered to water cooler, the adulterant that cooled off is stored up.
On colliery, basin, Powder river, tested the derived method of this operation.Used operation steps and described difference is in Powder river test, treated duff grain part its with cooled off before the rough coal grain partly mixes.In the test in place of Powder river, 5cm * 0 raw coal is sent on the sieve of 1.9cm mesh.Partly in addition dry the duff grain by sieve, but the rough coal grain that flows through above the sieve does not partly carry out drying.Screen being divided into the rough coal grain partly and after the duff grain part, using 25-33%(weight) aqueous ammonium nitrate solution is sprayed on this two portions coal grain.In the test of Powder river, after the duff grain cooling that drying is crossed, with wet partly fusion of rough coal grain.This duff grain was heated to 66-121 ℃ from envrionment temperature in 2-10 minute, the temperature of the duff grain of in water cooler drying being crossed reduces 28-56 ℃.
Be used for Bed for Fine Coal and partly keep identical with the amount of Coarse Coal oxidizing agent solution partly.Use weight less than 0.2%() ammonium nitrate handle 5 * 10
4Kilogram (50 tons) coal is used the weight less than 0.5%() ammonium nitrate handle other 5 * 10
4Kilogram (50 tons) coal.The sample of handling is constituted one 10
5The stockpile of kilogram (100 tons), sample are close to and are deposited on the special ready level land that small baffle arranged, and stockpile began to smoulder after 33 days.But it is dry to adopt identical method and condition, and just the undressed dump for contrast usefulness that sprays without nitrate solution only just begins to smoulder after stacking 8 days.
Grieshoch and cigarette are arranged on the dump surface, and this shows and smoulders.Every stockpile detects its temperature with 20 thermoelectric corners.Depositing the top temperature that recorded in the stockpile of contrast usefulness afterwards in 3 days is 88 ℃.The top temperature that records after 25 days stack in the stockpile of handling with ammonium nitrate is about 71 ℃.Laboratory and test in place show significantly, handle the spontaneous combustion tendency that can stop the exsiccant low rank coal significantly with ammonium nitrate.As known in the art, ammonium nitrate is a kind of inexpensive, nontoxic and chemical of being easy to get.
The rough coal grain that has wet with oxygenant is partly good with the fusion before their coolings of the duff grain part of using wetting back of oxygenant and drying, and this is particularly preferred treatment scheme.Under the identical substantially situation of treatment time and expense, coal sample method of fusion before cooling trends towards forming a kind of cool product.Lesser temps is stacked the product that gets up down will have lower spontaneous combustion tendency than stack the product that gets up under initial comparatively high temps.
In general, the water that is usually used in preparing aqueous oxidizing agent solution can be in fact water arbitrarily, as long as can be as good solvent, can be compatible with used special oxygenant, and be that inert gets final product basically to the oxidizing reaction of coal.Shi Yi water requires in every premium on currency insoluble solid thing total content to be not more than 10 grams especially, and main cations (being the positively charged ion of content greater than trace) is not more than 150 milligramequivalents.
In general, method of the present invention can be implemented with any device, such as defeated device for coal, and sieve, moisture eliminator and water cooler, they all have ready-made, and are suitable for their original functions.
Claims (9)
1, a kind of with low rank coal drying, oxidation and cooling to reduce the method for its spontaneous combustion tendency, it is characterized in that, be used as oxygenant a kind of perchlorate and (or) a kind of aqueous solution of nitrate sprays coal particle, this aqueous solution is evenly distributed on the coal particle surface substantially, the add-on of water be not more than coal heavy 10%; The wet coal of gained is heated to from envrionment temperature is up to 204 ℃ and carries out drying, make that moisture content drops to the required degree of product of coal basically in the coal; Then the coal of handling like this is cooled to below 38 ℃.
2, according to the process of claim 1 wherein coal is divided into coarse fraction and fine fraction, aqueous oxidizing agent solution is added in this two portions coal, again the duff grain that contains oxygenant is partly carried out drying, then such two portions coal sample of handling is blended together.
3, according to the method for claim 2, the rough coal grain part that wherein contains oxygenant with contain oxygenant and through the fusion before their coolings of exsiccant duff grain part.
4, according to the process of claim 1 wherein coal is divided into coarse fraction and fine fraction, only aqueous oxidizing agent solution is added in the duff grain part, again the part that contains oxygenant is carried out drying, then this two portions coal charge fusion.
5, according to the process of claim 1 wherein that oxygenant is ammoniumper chlorate or ammonium nitrate.
6, be up to 149 ℃ according to the process of claim 1 wherein coal is heated to from envrionment temperature.
7, according to the method for claim 6, wherein coal is heated to 66-121 ℃ from envrionment temperature.
8,, wherein coal is heated to more than 38 ℃-66 ℃ from envrionment temperature according to the method for claim 6.
9, according to the method for claim 1,2 or 5, wherein by the water yield that aqueous oxidizing agent solution added be not more than (coal is heavy) 2%.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US94345586A | 1986-12-19 | 1986-12-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1039052A CN1039052A (en) | 1990-01-24 |
| CN1023489C true CN1023489C (en) | 1994-01-12 |
Family
ID=25479697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88103998 Expired - Fee Related CN1023489C (en) | 1986-12-19 | 1988-06-30 | Process for inhibiting the spontaneous oxidation of low rank coal |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN1023489C (en) |
| AU (1) | AU605302B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100507214C (en) * | 2006-12-21 | 2009-07-01 | 煤炭科学研究总院重庆分院 | Chemical fire retartant for preventing controlling coil mineral well coal self-igniting |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5456073B2 (en) | 2012-01-06 | 2014-03-26 | 三菱重工業株式会社 | Coal deactivation processing equipment |
| DE112013001465T5 (en) * | 2012-03-15 | 2014-12-11 | Benetech, Inc. | Inhibition of auto-ignition in low-rank coal |
| CN103509603B (en) * | 2012-06-28 | 2015-06-10 | 新奥科技发展有限公司 | Preparation method of raw material for coal catalytic gasification technique |
| JP5971652B2 (en) | 2012-10-09 | 2016-08-17 | 三菱重工業株式会社 | Coal deactivation processing equipment |
| JP5536247B1 (en) | 2013-03-04 | 2014-07-02 | 三菱重工業株式会社 | Coal deactivation processing equipment |
| CN105561500A (en) * | 2016-01-29 | 2016-05-11 | 深圳东信环能科技有限公司 | Method for preventing coal of round coal storage yard from spontaneously combusting and application of method |
| JP2020026489A (en) * | 2018-08-13 | 2020-02-20 | 栗田工業株式会社 | Coal anti-oxidation agent, and coal oxidation prevention method |
-
1988
- 1988-05-30 AU AU16770/88A patent/AU605302B2/en not_active Ceased
- 1988-06-30 CN CN 88103998 patent/CN1023489C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100507214C (en) * | 2006-12-21 | 2009-07-01 | 煤炭科学研究总院重庆分院 | Chemical fire retartant for preventing controlling coil mineral well coal self-igniting |
Also Published As
| Publication number | Publication date |
|---|---|
| AU1677088A (en) | 1989-11-30 |
| CN1039052A (en) | 1990-01-24 |
| AU605302B2 (en) | 1991-01-10 |
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