CN1021343C - Solid fuel-water slurry composition and process for preparation of same - Google Patents
Solid fuel-water slurry composition and process for preparation of same Download PDFInfo
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- CN1021343C CN1021343C CN87108310A CN87108310A CN1021343C CN 1021343 C CN1021343 C CN 1021343C CN 87108310 A CN87108310 A CN 87108310A CN 87108310 A CN87108310 A CN 87108310A CN 1021343 C CN1021343 C CN 1021343C
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
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Abstract
To industrially and readily produce a solid fuel.water slurry, containing a solid fuel in a high concentration and having a low viscosity, by adding a coarsely crushed solid fuel, water, etc., to a pulverized slurry of a coarsely crushed solid fuel and water, etc., and pulverizing the resultant slurry in a rod mill, etc. A solid fuel consisting of coarsely crushed coal or petroleum coke having about <=20mm geometrical average diameter and water (and an additive) are wet pulverized to provide a slurry having 30-149mum geometrical average particle diameter (Dp50<1>). The above-mentioned coarsely crushed solid fuel and water (and an additive) are added to the afore-mentioned slurry so as to provide 0.4-2.4 ratio (Rw) of the weight (F1) of the solid fuel in the slurry to the weight (F2) of the coarsely crushed solid fuel added and the slurry is wet pulverized in a rod mill under condition for providing 0.8-4 ratio (Rs) of the geometrical average diameter (Dp50<2>) of the obtained slurry to the Dp50<1> and 1-3 ratio (Rs/Rw) ratio to afford the aimed solid fuel.water slurry.
Description
The present invention is relevant with a kind of solid fuel-water slurry composition.More particularly, the invention relates to a kind of solids content height but the low again solid fuel-water slurry composition of its viscosity, this serosity combination is easy to transportation, stores and loading and unloading, and the present invention simultaneously is also relevant with the method for preparing this serosity combination.
Recently, the solid fuel of coal, refinery coke and so on, the energy of oil comes into one's own again as an alternative.But compare with the liquid fuel of oil and so on, solid fuel has transportation and stores the shortcoming of difficulty.In addition, it is not high to load and unload solid-fuelled working efficiency.
In order to overcome these shortcomings, developed recently by being scattered in the slurries of the solid fuel-water that obtains in the water through the solid fuel of fine grinding.But this solid fuel-water slurry still has following shortcoming: the solid fuel content that increases slurries then causes the remarkable increase of gained slurry viscosity.The flowability of the solid fuel-water slurry that viscosity has increased is poor, causes it to be difficult to by line treatment and conveying.Solid fuel content can reduce the viscosity of solid fuel-water slurry in the reduction slurries.But this conveying efficiency that has reduced the solid fuel-water slurry of solid fuel content has also been reduced.Another shortcoming that has reduced solid fuel content is, must just can act as a fuel after pre-processed or the evaporation source use.
For fear of above-mentioned shortcoming, various schemes were once proposed, for example add dispersion agent, or regulate particle size dispersion.
But find, has the high solid fuel content, and reduced the solid fuel-water slurry of viscosity according to currently known methods, its solid fuel particle is easy to generate sedimentation in long storage or on tank car or oil tanker in the transportation, and these settled particles can lump in dehydration, form the material of compacting.When using as solid fuel-water slurry, the bulk of these compactings is difficult to be disperseed again.Therefore, need do further to improve to method for stabilization of solid fuel-water slurries.
Also finding in addition has another shortcoming based on the currently known methods of regulating particle size dispersion.Japanese Patent Provisional Publication No.59(1984)-15486 described, can obtain solid fuel content height, solid fuel-water slurry that viscosity is low by regulating particle size dispersion to increase the method for geometric standard deviation (σ g).In this method, the increase of geometric standard deviation is to realize by the scope that enlarges particle size dispersion.The expansion of particle size distribution realizes by increasing macrobead content and/or fines content.The increase of macrobead content can reduce the stability of slurries in storing, and causes undesirable trouble, as stop up burner in course of injection, increases in combustion processes and does not fire particle etc.In addition, increase fines content as desire and do not consume a large amount of grinding energy again, be actually suitable difficulty.Say that again the increase of fines content must cause the long-pending remarkable increase of specific grain surface, thereby need to increase the consumption of dispersion agent.
One of purpose of the present invention provides the composition of the low solid fuel-water slurry of a kind of solid fuel particle content height and viscosity.
Another object of the present invention is, the composition of a kind of solid fuel particle content height, solid fuel-water slurry that viscosity is low is provided, its stabilizer pole, this solid fuel particle can remain on good dispersion state in aqueous slurry, when this slurries long storage or when under mal-condition, transporting, can not produce the sediment of compacting basically.
The 3rd purpose of the present invention is that the proper method of preparation through above-mentioned improved solid fuel-water slurry is provided.
The invention provides a kind of composition of solid fuel-water slurry, it contains 50-80%(weight) coal and/or the solid fuel particle of refinery coke, wherein particulate geometric mean diameter (Dp50) is not more than 74 μ m, its particle size dispersion is adjusted to following state: the arithmetical av of geometric standard deviation on it (σ g+) and following geometric standard deviation (σ g-), in lognormal distribution, be in the 6-12 scope, its ratio σ g+/σ g-is not more than 0.6.
Terminology used here " geometric mean diameter " and " geometric standard deviation " are definitions particles size and general term when distributing thereof.Specifically, these terms are to define in the following manner with the weight percentage that diameter in the lognormal distribution and accumulation are passed through:
Geometric mean diameter (Dp50): accumulation is equivalent to 50% o'clock diameter by weight percentage.
Last geometric standard deviation (σ g+): accumulation is equivalent to 84.13% o'clock diameter (Dp+ σ) by weight percentage, with the ratio of geometric mean diameter (Dp50), i.e. and (Dp+ σ)/Dp50.
Following geometric standard deviation (σ g-): geometric mean diameter (Dp50) is equivalent to the ratio of 15.87% o'clock diameter (Dp-σ), i.e. Dp50/(Dp-σ with accumulation by weight percentage).
Geometric standard deviation (σ g): the arithmetical av of upper and lower geometric standard deviation (in lognormal distribution), i.e. (σ g+ ten σ g-)/2.
Can prepare above-mentioned solid fuel-water slurry composition aptly with following method, this method comprises:
The first step is ground in the aqueous solution of water or additive and is contained geometric mean diameter and be not more than the hygrometric state coal of about 20mm or the solid fuel of petroleum coke particles, contains geometric mean diameter (Dp50 with preparation
1) the solid fuel-water slurry of solid fuel particle between 30 to 149 μ m;
Second step, the solid fuel-water slurry that will in the first step, prepare and aforementioned coarse grained coal or refinery coke, aqueous solution with water or additive, the mixture of gained is carried out wet grinding with rod mill, to prepare a kind of solid fuel-water slurry, the geometric mean diameter (Dp50 of its contained solid fuel particle
2) be not more than 74 μ m, and and in the first step geometric mean diameter (Dp50 of solid fuel particle in the gained solid fuel-water slurry
1) ratio Rs(=Dp50
1/ Dp50
2) between 0.8 to 4; Rw(=F1/F2) between 0.4 to 2.4, F1 represents that the solid-fuelled input speed (weight) that adds, F2 represent the solid-fuelled input speed of coarse particles (weight) that adds in second step in the first step herein;
And Rs/Rw is between 1 to 3.
The present invention also provides a kind of solid fuel-water slurry composition, contains the solid fuel particle of 50 to 80 parts of (weight) coals and/or refinery coke and the stablizer (being stabiliser composition) of 0.01-0.5 part (weight) in its per 100 parts of (weight) solid fuel-water slurries.Stablizer is by accounting for 1-20%(weight) at least a water-soluble polymers and account for 80-99%(weight) the fine particle of at least a inorganic substance form.Used water-soluble polymers is selected from natural gum, modified natural natural gum, polyhexene alcohol, polyacrylamide, carboxymethyl cellulose and Natvosol etc.Used inorganic substance are selected from wilkinite, polygorskite, sepiolite and chrysotile etc.
Schema shown in the figure one can be used for preparing solid fuel-water slurry of the present invention.
The solid fuel of Shi Yonging is coal and/or refinery coke in the present invention.Coal and refinery coke are had no particular limits, and the great majority of normally used coal and refinery coke all are suitable for.Preferably use and contain 6%(weight approximately) coal of ash.Contain 10%(weight approximately) coal of ash after handling through dedust, for example handle making the ash content of coal be lower than about 6%(weight through the dense medium enrichment) level also useful.Refinery coke can be the byproduct of petroleum refining process, and may contain 0.1% to 1%(weight) ash.
Solid fuel-water slurry composition of the present invention contains solid fuel particle 50-80%(weight), 65-75% preferably.Particulate geometric mean diameter (Dp50) is not more than 74 μ m, preferably 20-53 μ m.If geometric mean diameter is 74 μ m or bigger, then coarse grained content increases, and makes to adopt the operation of these slurries to bring variety of issue.If geometric mean diameter is too little, then the content of fines increases.From the viewpoint of production efficiency, the solid fuel that the amount of producing contained fines has increased is disadvantageous.Moreover, so expect to disperse for the solid that will contain a large amount of fines, also need to increase dispersant dosage.
As for the solid fuel that is used as in the slurries of the present invention, its particle size dispersion is adjusted to following state: arithmetical av (the σ g of the upper and lower geometric standard deviation in the lognormal distribution
++ σ g-)/2 between 6-12; Upper and lower standard deviation be not more than 0.6 than σ g+/σ g-, preferably be not more than 0.4.By such adjusting particle size dispersion, just can produce that solid fuel content increases but solid fuel-water slurry that viscosity number reduces.
If want σ g+/σ g-be 0.6 or bigger condition under, reduce coarse grained content, just must reduce geometric mean diameter (Dp50).This can make the suitability for industrialized production of solid fuel content height, solid fuel-water slurry that viscosity number is low that difficulty takes place.
By comprising the method for the following step, can prepare easily and contain the solid fuel-water slurry composition that with good grounds the present invention regulated particle size dispersion:
(1) the first step
Geometric mean diameter is not more than the solid fuel that the coarse particles of the coal of about 20mm or refinery coke is formed, hygrometric state grinds in the aqueous solution of water or additive, contains the solid fuel-water slurry of geometric mean diameter (Dp50) at the solid fuel particle of (preferably between 44-149 μ m) between 30-149 μ m with preparation.The content of solid fuel particle is in 30-80%(weight in the gained slurries) between better, in 50-70%(weight) between then better.The shredder of wet method operation can be common shredder, for example ball mill, tuber grinder or runner milling.The example of additive comprises aforesaid dispersion agent, stablizer, and PH conditioning agent, for example sodium hydroxide, potassium hydroxide and ammonium hydroxide.
(2) second steps
The solid fuel-water slurry that will in the first step, make, with aforesaid coal or refinery coke coarse particles, and the water-soluble liquid-phase mixing of water or additive, with known shredder (preferably rod mill) resulting mixture is carried out wet grinding, to prepare a kind of solid fuel-water slurry, the geometric mean diameter (Dp50 of its solid fuel particle
2) be not more than 74 μ m, be preferably between the 20-53 μ m, and with the geometric mean diameter (Dp50 of the solid fuel particle of the solid fuel-water slurry that in the first step, makes
1) following relation: Rs=Dp50 arranged
1/ Dp50
2=0.8-4 is preferably between the 0.8-3.
As previously mentioned, to grinding steps in second step, to use rod mill the most suitable, because adopt the rod milling function to make desirable solid fuel-water slurry in the cycle at short grinding operation.
In aforesaid method, Rw=F1/F2 is preferably between the 0.4-2.4, better between 0.6-1.6, wherein F1 is the coarse particles solid-fuelled input speed (weight) of input speed (weight) F2 for directly adding of the coarse solids fuel that adds in the first step in second step.Secondly, Rs/Rw is preferably between 1-3.At last, the geometric standard deviation (σ g) in the lognormal distribution of the solid fuel particle in second step in the resulting solid fuel-water slurry is preferably between the 3.5-12, and is better between 6-12.
Aforesaid method by twice grinding formed also will describe in detail with reference to schema shown in Figure 1 hereinafter.
The first step
Add entry by pipeline 15 to tempering tank 1 and also can add additive (for example dispersion agent) and/or PH conditioning agent, then it is passed through pipeline 16, pump 2, pipeline 17, under meter 3 and pipeline 18, deliver to wet wheeling machine 6.The coarse particles solid fuel can be provided with if desired by pipeline 19, hopper 13, pipeline 20, constant feeder 4, pipeline 21, crusher 5(, with the bulk in the broken feed) and pipeline 22, be conducted to wet wheeling machine 6.Control is conducted to the water yield and the solid fuel particle amount of wet wheeling machine 6, so that the solid content of the solid fuel-water slurry that produces is in 30-80%(weight) between.
In wet wheeling machine 6, solid fuel particle mixes mutually with water (comprising the additive that can add), and is pulverized simultaneously, produces to contain the particulate solid fuel-water slurry of geometric mean diameter at the 30-149 mu m range.The some of this solid fuel-water slurry can circulate by pipeline 23, pump 7, pipeline 24 and 25, is back to wet wheeling machine 6.
Second step
By pipeline 23, pump 7, pipeline 24, pipeline 26, under meter 8 and pipeline 27, the solid fuel-water slurry of the first step preparation is delivered to for example rod mill of shredder 11().Pulverized therein by pipeline 28, hopper 14, pipeline 29, constant material feeder 9, pipeline 30, crusher 10(fuel pellet) and pipeline 31, solid fuel particle is added to shredder 11.Deliver to tempering tank 50 by pipeline 38 Jiang Shui and the additive (for example aforementioned reagent) that can add, by pipeline 39, pump 44, pipeline 40, under meter 51 and pipeline 41, be sent to shredder 11 then.In shredder 11, carry out the fine grinding process, the solid fuel-water slurry that has desirable particle size dispersion with preparation.
The solid fuel-water slurry that will prepare in shredder 11 causes in the slurries basin 12 by pipeline 32, can discharge by pipeline 33, pump 43, pipeline 34 and 35.If desired, stablizer can be added in the slurries of discharge.The some of this solid fuel-water slurry can circulate by pipeline 36, returning shredder 11, and/or by pipeline 37, and be back to wet wheeling machine 6.
As previously mentioned, in order to suppress seemingly to increase the increase of the viscosity that causes, can contain suitable additive, for example dispersion agent in the solid fuel-water slurry composition of the present invention owing to solid fuel concentration.As dispersion agent, can use a kind of known dispersion agent.The example of dispersion agent comprises naphthene sulfonic acid and its esters, mahogany acid and its esters, lignosulfonic acid and its esters, and their formaldehyde condensation products; Polyoxyethylene-alkyl ether sulphate and its esters; Polyoxyethylene alkylaryl ether sulfuric ester and its esters; The Polyglycerine sulfuric ester; Melmac sulfonic acid and its esters; And coal collection sulfonic acid and its esters.
Use the amount of dispersion agent,, use 0.01 to 3 part (weight) preferably to per 100 parts of (weight) solid fuel-water slurries.Can dispersion agent be added in the solid fuel-water slurry in any step of preparation slurry method.Otherwise, also dispersion agent can be added in the previously prepd solid fuel-water slurry.
Solid fuel-water slurry composition of the present invention also can comprise suitable additive, for example the PH conditioning agent.As the PH conditioning agent, can use known PH conditioning agent.The example of PH conditioning agent has sodium hydroxide, potassium hydroxide, reaches ammonium hydroxide.
Solid fuel-water slurry composition of the present invention has lower viscosity, for example is about 800mPas or lower (mensuration of this viscosity be described in back), but it contain be no less than 70%(weight) solid fuel.
Solid fuel-water slurry composition of the present invention.Can be expressed as the slurries of being made up of following: per 100 parts of (weight) solid fuel-water slurries contain 50-80 part (weight) coal and/or refinery coke solid fuel particle, 0.01-0.5 part (weight) (preferably 0.02-0.3 part) stablizer.This stablizer contains 1-20%(weight) at least a water-soluble polymers and 80-99%(weight) fine particle of at least a inorganics of (being preferably 90-98%).Water-soluble polymers can be selected from natural gum, modified natural natural gum, polyvinyl alcohol, polyacrylamide, carboxymethyl cellulose and Natvosol.The fine particle of inorganics can be selected from wilkinite, polygorskite, sepiolite and chrysotile.
The solid fuel-water slurry composition of the present invention that contains the aforementioned stable agent of being made up of specific organic substance and specific inorganic substance has greatly improved stability in its storage and transportation.
In above-mentioned water-soluble polymers, natural gum is the modified product of guar gum, xanthan gum (xanthane gum), Viscogum BE, kuteera gum, sodiun alginate or above-mentioned natural gum preferably.
For the stable slurry composition, stablizer can mix in the solid fuel serosity combination that does not have the particle size dispersion stipulated previously.
The present invention will further be illustrated by following embodiment.
The method of the mensuration solid fuel particle size-grade distribution that adopts in the following example and mensuration solid fuel-water slurry method of viscosity are set forth in the back:
(1) method of mensuration solid fuel particle size-grade distribution
Mensuration is to carry out with centrifugal pellet particle size analyzer (Japanese Shimazu Seisakusho Co., Ltd makes) and standard sieve.
(2) measure the solid fuel-water slurry method of viscosity
(Japanese Tokyo Keiki Co., Ltd makes, and uses No. 3 rotating cylinder) carries out viscosity measurement to the solid fuel-water slurry that has just prepared with the Brookfield rotational viscosimeter.Measure under 27C and carry out, rotating speed is 12r.p.m., is to get the observed value that process of measurement begins back 1 minute kind.
According to the schema of Fig. 1, as the wet wheeling machine in the first step 6, prepared a kind of solid fuel-water slurry with ball mill.
Add solid fuels (coal of coarse crushing has the geometric mean diameter of about 8mm) by pipeline 22 continuously to ball mill 6, simultaneously by pipeline 18 to its continuous adding aqueous dispersant (formaldehyde condensation products that contains the betanaphthyl sodium sulfonate.In ball mill 6, ground in dispersant solution through the coal of coarse crushing, produce solid particulate geometric mean diameter (Dp50
1) be the solid fuel-water slurry of 53.4 μ m.
By pipeline 27, this solid fuel-water slurry is infeeded second step of rod mill 11-continuously then.Simultaneously, another partly through coal and another part dispersant solution of coarse crushing, by pipeline 31 and 41, is conducted to rod mill 11 respectively.In rod mill 11, the solid fuel that infeeds is by fine grinding, and to prepare a kind of solid fuel-water slurry, its characteristic value is listed in table 1.The slurries that to make are like this discharged continuously by pipeline 35 at last.
Repeat the program of embodiment 1, use identical equipment, but changed grinding condition, preparation contains the solid fuel-water slurry of the listed particle diameter distribution value of table 1, and these particle diameter distribution values have exceeded the scope of the present invention's regulation.The characteristic value of gained slurries is also listed in table 1.
Listed result can obviously find out by table 1, contain solid fuel-water slurry according to the solid fuel particle of its particle diameter distribution value in stated limit of the present invention's preparation, with contain the almost solid fuel particle of equivalent, but its particle diameter distribution value exceeds the solid fuel-water slurry of the scope of the present invention's regulation to be compared, and has quite low viscosity number.
Table 1
Q[kg/h.m
2] 325 311 256
Rw 0.90 0.95 0.34
R5 1.21 0.79 1.44
Rs/Rw 1.34 0.85 4.31
Final slurries product
Dp50
244.1 27.4 31.6
50 order percent of pass [%] 99.8 99.9 99.9
σg 6.1 5.1 5.5
Concentration of slurry [%, weight] 70.1 69.5 69.9
Viscosity [mPas] 730 1,200 1150
Annotate: Q: what add rod mill waits to grind material speed (the unit useful area adds the weight of material)
Rw:F1/F2, the solid-fuelled weight of the coarse crushing that promptly adds in the first step is with the ratio Rs of the solid-fuelled weight of coarse crushing that adds in second step: Dp50
1/ Dp50
2, i.e. the ratio of the geometric mean diameter of solid fuel particle in the solid fuel-water slurry made respectively in first or second step.
Embodiment 2
De-ash coal with following component and character is carried out wet-milling in ball mill, carry out classification again,, obtain containing the various samples of different size particles to remove particle greater than No. 50 sieve apertures.The geometric mean diameter Dp50 of each sample of gained, Dp+ σ and Dp-σ list in table 2.
The analytical data of de-ash coal
Proximate analysis (%, weight): moisture 5.1
（JIS M8813）
Ash 2.3
Volatile matter 40.8
Fixed carbon 51.8
Calorific value (Kcal/Kg, JIS M8814): 7410
Ultimate analysis (%, weight): carbon 79.6
（JIS M8813）
Hydrogen 5.2
Nitrogen 1.7
Sulphur 0.5
Oxygen 10.6
Ash 2.4
Table 2
Sample Dp50 Dp+ σ Dp-σ
A 40μm 90μm 7.9μm
B 57μm 120μm 17μm
C 26μm 79μm 2.9μm
D 2.8μm 9.7μm -
With 64 parts of (weight) Sample A, 28 parts of (weight) sample C and 8 parts of (weight) sample D uniform mixing have the granular mixture of the coal of listed geometric mean diameter of table 3 and particle size distribution with preparation.
With 70 parts of (weight) above-mentioned coal dust intermixtures, 29.5 parts of (weight) water and 0.5 part of (weight) dispersion agent (beta-naphthalenesulfonic-acid formaldehyde condensation compound, sodium salt) are put into tempering tank, stir by hand under the room temperature.With mixture laboratory stirrer (Labo disper) (the Japanese Tokushu Kiko Kogyo Co. that obtains like this, Ltd. make) under the 3000r.p.m. rotating speed, stirred 3 minutes, contain 70%(weight with preparation) solid fuel-water slurry of fuel pellet.
The viscosity that records is listed in table 3.
Embodiment 3
With mode same among the embodiment 2, but coal dust intermixture mixes with 72 parts of (weight) sample B .21 parts (weight) sample C and 7 parts of (weight) sample D, prepared a kind of solid fuel-water slurry.
The geometric mean diameter of gained solid fuel-water slurry and particle size distribution are tabulated in 3.The viscosity that records is also tabulated in 3.
Reference embodiment 3 and 4
With mode same among the embodiment 2, but use all coal dusts within specialized range of the present invention not of geometric mean diameter and particle size distribution, prepared solid fuel-water slurry.The geometric mean diameter of gained solid fuel-water slurry and particle size distribution, and the viscosity that records are all listed in table 3.
Table 3
Sample arithmetical av ratio geometric mean diameter Dp+ σ viscosity
[μm] [μm] [mPa·s]
Embodiment 2 6.2 0.25 32 80 780
Embodiment 3 6.1 0.26 44 110 700
Reference embodiment 3 6.1 0.71 16 84 2700
Reference embodiment 4 6.0 0.71 22 110 1300
Annotate: arithmetical av is the arithmetical av of upper and lower geometric standard deviation,
I.e. (σ g
++ σ g-)/2
Ratio is σ g+ and the ratio of σ g-, i.e. σ g+/σ g-
Geometrical mean is Dp50[μ m]
Embodiment 4-6
With with embodiment 2 in identical mode, prepared contain with embodiment 2 in the same geometric mean diameter and the coal particle mixture of particle size distribution, but the coal particle mixture is by the de-ash coal preparation with following component:
The analytical data of de-ash coal:
Proximate analysis (% weight): moisture 5.3
(JIS M8812) ash content 0.7
Volatile matter 38.8
Fixed carbon 55.2
Coal particle mixture, water, dispersion agent (formaldehyde condensation products of beta-naphthalenesulfonic-acid, sodium salt) and pH regulator agent (ammonium hydroxide) are at room temperature placed tempering tank, manual then mixing thoroughly.Per 100 parts of (weight) solid fuel-water slurries are with 0.5 part of (weight) dispersion agent.With laboratory stirrer at 3000r.p.m: under the rotating speed gained mixture was stirred 3 minutes, contains 70%(weight with preparation) fuel pellet, viscosity is that the 800mPas.pH value is 8.0 initial stage solid fuel-water slurry.
In the initial stage solid fuel-water slurry, add stablizer then, and these slurries are carried out manual stirring.Then use above-mentioned laboratory stirrer, under 3000r.p.m., this is stirred slurries 3 minutes, to obtain the solid fuel-water slurry that viscosity is about 1000mPas.
Reference embodiment 5-10
Repeat the program of embodiment 4, but in reference embodiment 5-9, replace stablizer, replace stablizer and in reference embodiment 10, exceed mixture of the present invention, to obtain the solid fuel-water slurry that viscosity is about 1000mPas with its composition with single compound.
The assessment of package stability and transportation stability
To the solid fuel-water slurry that in embodiment 4-6 and reference embodiment 5-10, obtains, assess its package stability and transportation stability in the following manner.
Measure the method for package stability:
Solid fuel-water slurry is placed the 100ml glass test tube, it is placed vertically 7 days then.At the end of 7 day storage period, insert in the slurries with glass stick, with at the bottom of measuring fuel pellet and whether being deposited on test tube, perhaps at the bottom of test tube, whether formed caking.
Measurement result is with following symbolic representation:
AA: do not observed sedimentary particle, also do not observed the particle of caking;
BB: observed deposited particles, but do not observed the particle formation of caking;
CC: observe the particle that has formed caking.
Measure the method for transportation stability:
Solid fuel-water slurry is placed the 100ml glass test tube, make it stand transverse vibration (amplitude 40mm, frequency 90min then
-1) 5 hours.When vibration finishes, insert slurries with glass stick, with at the bottom of measuring fuel pellet and whether being deposited on test tube, or at the bottom of test tube to form the particle caking.
Measurement result with following symbolic representation is:
Aa: both do not found that particle deposition also found no caking;
Bb: finding has particle deposition, but does not find to form caking;
Cc: find to have formed the particle caking.
The results are shown in table 4.
Table 4
Stablizer stablizer add-on package stability transportation stability
(weight ratio) (%, weight)
Embodiment 4 xanthan gum (6) 0.106 AA aa
Polygorskite (94)
Wilkinite (95)
Embodiment 6 Natvosols (5) 0.100 AA aa
Wilkinite (95)
Reference embodiment 6 polyvinyl alcohol (100) 0.004 CC bb
Reference embodiment 8 polygorskites (100) 0.130 AA cc
Reference embodiment 9 wilkinites (100) 0.135 BB cc
Reference embodiment 10 polyvinyl alcohol (22) 0.018 BB bb
Wilkinite (78)
Annotate: the amount that adds additive according to the amount decision of solid fuel-water slurry.
Claims (15)
1, a kind of solid fuel-water slurry composition, described composition contains coal and/or the solid fuel particle of refinery coke and the dispersion agent of 0.01-3 weight % of 50-80 weight %, wherein, particulate geometric mean diameter (Dp50) is not more than 74 μ m, and particle size distribution be adjusted in lognormal distribution on the arithmetical av of geometric standard deviation (σ g+) and following geometric standard deviation (σ g-) between 6-12, and their ratio (σ g+/σ g-) is not more than 0.6.
2, according to solid fuel one water slurry composition of claim 1, wherein, it contains the solid coal of 65-75% weight % and/or the solid fuel of refinery coke.
3, according to solid fuel one water slurry composition of claim 1, wherein, the geometric mean diameter of solid fuel particle (Dp50) is between 20-53 μ m.
4, according to solid fuel one water slurry composition of claim 1, wherein, the ratio of upper and lower geometric standard deviation (σ g+/σ g-) is not more than 0.4.
5, according to solid fuel one water slurry composition of claim 1, wherein, dispersion agent is selected from following material: naphthene sulfonic acid and its esters, mahogany acid and its esters, lignosulfonic acid and its esters, and their formaldehyde condensation products, Voranol EP 2001 sulfuric ester and its esters, polyoxyethylene alkylaryl ether sulfuric ester and its esters; The Polyglycerine sulfuric ester, melmac sulfonic acid and its esters, and coal extracts sulfonic acid and its esters.
6, solid fuel one water slurry composition according to claim 1, it by containing 50-80 weight % coal or/and solid fuel one aqueous slurry 100 weight parts of refinery coke solid fuel particle, dispersion agent 0.01-3 weight part, and stablizer 0.01-0.5 weight part is formed, at least a water-soluble polymers that is selected from following material that contains 1-20 weight % in this stablizer: natural gum, modified natural natural gum, polyvinyl alcohol, polyacrylamide, carboxymethyl cellulose and Natvosol also contain the wilkinite that is selected from of 80-99 weight %, polygorskite, the fine particle of at least a inorganic substance in sepiolite and the chrysotile.
7, a kind of solid fuel one water slurry composition, it is by solid fuel one aqueous slurry 100 weight parts that contain 50-80 weight % coal and/or refinery coke solid fuel particle, dispersion agent 0.01-3 weight part, and stablizer 0.01-0.5 weight part is formed, the natural gum that is selected from that contains 1-20 weight % in this stablizer, modified natural natural gum, polyvinyl alcohol, polyacrylamide, at least a water-soluble polymers in carboxymethyl cellulose and the Natvosol also contains the wilkinite that is selected from of 80-99 weight %, polygorskite, the fine particle of at least a inorganics in sepiolite and the chrysotile.
8,, it is characterized in that water-soluble polymers is a kind of natural gum, is selected from the modified product of guar gum, xanthan gum, Viscogum BE, kuteera gum, sodiun alginate and described natural gum according to solid fuel one water slurry composition of claim 7.
9,, it is characterized in that stablizer comprises 2-10(weight according to solid fuel one water slurry composition of claim 7) water-soluble polymers and the 90-98(weight of %) the inorganics fine particle of %.
10, according to solid fuel one water slurry composition of claim 7, it is characterized in that every 100(weight) contain 0.02-0.3(weight in part this solid fuel one aqueous slurry) part stablizer.
11,, it is characterized in that it contains 65-75%(weight according to solid fuel one water slurry composition of claim 7) solid fuel.
12, according to solid fuel one water slurry composition of claim 7, it is characterized in that, dispersion agent is selected from naphthene sulfonic acid and its esters, mahogany acid and its esters, lignosulfonic acid and its esters, and their formaldehyde condensation products, Voranol EP 2001 sulfuric acid and its esters, polyoxyethylene alkylaryl ether sulfuric acid and its esters, Polyglycerine sulfuric acid ester, melmac sulfonic acid and its esters; And coal extracts sulfonic acid and its esters.
13, a kind of method for preparing solid fuel one water slurry composition, this method comprises:
The first step, grinding contains coal or the petroleum coke particles solid fuel that geometric mean diameter is not more than 20mm under the hygrometric state in the water or the additive aqueous solution, to prepare the geometric mean diameter (Dp50 of contained solid fuel particle
1) solid fuel one aqueous slurry between 30-140 μ m,
Second step, with solid fuel one aqueous slurry and the water or the interpolation aqueous solution that in the first step, makes, and above-mentioned coarse particles coal or refinery coke mixing, with rod mill the gained mixture is ground, to prepare a kind of solid fuel one aqueous slurry, the geometric mean diameter (Dp50 of its solid fuel particle
2) be not more than 74 μ m, and the geometric mean diameter (Dp50 of the solid fuel particle of solid fuel one aqueous slurry that makes with the first step
1) following relation: R arranged
S=Dp50
1/ Dp50
2=0.80～4, Rw=F1/F2=0.4～2.4, F1 wherein, F2 are respectively the input speed (weight) of the coarse solids fuel that adds to the first step and second step, and Rs/Rw=1～3.
14, according to the method for claim 13, it is characterized in that, carry out the first step to produce the geometric mean diameter (Dp50 of its solid fuel particle
1) solid fuel one aqueous slurry between 44 to 149 μ m.
15, according to the method for claim 13, it is characterized in that, carried out for second step to produce solid fuel one aqueous slurry of a kind of its Rs value between 0.8 to 3.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61313429A JPH0662969B2 (en) | 1986-12-26 | 1986-12-26 | Stable solid fuel / water slurry |
| JP313429/86 | 1986-12-26 | ||
| JP62005841A JPH0710987B2 (en) | 1987-01-12 | 1987-01-12 | Solid fuel / water slurry |
| JP5841/87 | 1987-01-12 | ||
| JP20789/87 | 1987-01-31 | ||
| JP62020789A JPS63189495A (en) | 1987-01-31 | 1987-01-31 | Production of solid fuel-water slurry |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN87108310A CN87108310A (en) | 1988-08-10 |
| CN1021343C true CN1021343C (en) | 1993-06-23 |
Family
ID=27276920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN87108310A Expired - Fee Related CN1021343C (en) | 1986-12-26 | 1987-12-24 | Solid fuel-water slurry composition and process for preparation of same |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR900005100B1 (en) |
| CN (1) | CN1021343C (en) |
| AU (1) | AU612127B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007124681A1 (en) * | 2006-04-24 | 2007-11-08 | Guangzhou Devotion Thermal Technology Co., Ltd. | Desulfurizing coke-water slurry and process for preparation thereof |
| CN100376659C (en) * | 2006-08-02 | 2008-03-26 | 威海蓝星玻璃股份有限公司 | Solid liquid mixing fuel in use for melt kiln for founding glass |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1092231C (en) * | 1999-05-28 | 2002-10-09 | 中国石油化工集团公司 | Low-grade coal modified refinery coke water slurry composition and use thereof |
| KR101684746B1 (en) * | 2014-12-24 | 2016-12-08 | 에스케이이노베이션 주식회사 | Petroleum slurry composition comprising polyurethane based gelling agent |
| KR101953737B1 (en) * | 2017-05-30 | 2019-05-17 | 한국에너지기술연구원 | Method of operating synthetic gas dual fuel engine with gasification system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2520750B1 (en) * | 1982-01-29 | 1986-06-06 | Charbonnages De France | AQUEOUS SUSPENSIONS OF AT LEAST ONE SOLID FUEL AND A PROCESS FOR THEIR PREPARATION |
| US4722740A (en) * | 1982-09-30 | 1988-02-02 | Oxce Fuel Company | Dispersions of coal in water useful as a fuel |
| JPS62116692A (en) * | 1985-11-16 | 1987-05-28 | Kawasaki Heavy Ind Ltd | Method and device for production of finely particulate, high-concentration coal-water slurry |
-
1987
- 1987-12-24 CN CN87108310A patent/CN1021343C/en not_active Expired - Fee Related
- 1987-12-24 AU AU83052/87A patent/AU612127B2/en not_active Ceased
- 1987-12-26 KR KR1019870015002A patent/KR900005100B1/en not_active IP Right Cessation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007124681A1 (en) * | 2006-04-24 | 2007-11-08 | Guangzhou Devotion Thermal Technology Co., Ltd. | Desulfurizing coke-water slurry and process for preparation thereof |
| CN100376659C (en) * | 2006-08-02 | 2008-03-26 | 威海蓝星玻璃股份有限公司 | Solid liquid mixing fuel in use for melt kiln for founding glass |
Also Published As
| Publication number | Publication date |
|---|---|
| KR900005100B1 (en) | 1990-07-19 |
| AU612127B2 (en) | 1991-07-04 |
| KR880007699A (en) | 1988-08-29 |
| AU8305287A (en) | 1988-06-30 |
| CN87108310A (en) | 1988-08-10 |
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