CN107267236A - The technique and the coal gasifying process using the technique of a kind of utilization coal or gangue production high heating value water-coal-slurry - Google Patents
The technique and the coal gasifying process using the technique of a kind of utilization coal or gangue production high heating value water-coal-slurry Download PDFInfo
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- CN107267236A CN107267236A CN201710502714.6A CN201710502714A CN107267236A CN 107267236 A CN107267236 A CN 107267236A CN 201710502714 A CN201710502714 A CN 201710502714A CN 107267236 A CN107267236 A CN 107267236A
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G1/00—Mixtures of fertilisers belonging individually to different subclasses of C05
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
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- 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
- C10L1/00—Liquid carbonaceous fuels
- C10L1/32—Liquid carbonaceous fuels consisting of coal-oil suspensions or aqueous emulsions or oil emulsions
- C10L1/326—Coal-water suspensions
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- Life Sciences & Earth Sciences (AREA)
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Abstract
The invention discloses the technique that a kind of utilization coal or gangue produce high heating value water-coal-slurry, wherein the coal or gangue are comprising non-flammable mineral matter and containing hydrocarbon combustible, the technique comprises the following steps：A, by coal or gangue in water wet-milling to particulate matter average grain diameter be less than 500 microns, continue wet-milling during add additive it is uniformly dispersed, obtain micro-nano water-coal-slurry；B, it is passed through into the micro-nano water-coal-slurry microbubble that diameter is less than 200 microns, the mineral particle for wherein having sticked the additive is reunited and sunk as underflow, wherein turn into floating logistics with bubble floating containing hydrocarbon flammable composition granule, be achieved in the separation of the two；C, separated described containing hydrocarbon flammable composition granule from floating logistics, the high heating value water-coal-slurry that calorific value is higher than 4000 kcal/kg is configured to through press filtration.The invention also discloses the coal gasifying process for including high heating value water-coal-slurry preparation technology, colm is caused to can be used for coal water slurry gasification first.
Description
Technical field
The invention belongs to coal gasifying process field, and in particular to one kind produces high heating value water-coal-slurry simultaneously using coal or gangue
The method of byproduct mineral matter matter composite fertilizer.
Background technology
In traditional coal gasifying process, the difference of raw material according to used in gasification furnace, be divided into dry powder coal gasification technique and
Water-coal-slurry coal gasifying process, the former is directly entered with the dry coal dust of compressed gas carrying is gasified in gasification furnace, the latter Ze Tong
Often coal dust and water are mixed into after water-coal-slurry into gasification furnace and gasified.Due to wet gas chemical industry skill feed continuity,
It is better than dry powder coal gasification technique in terms of stability, cost, therefore the former industrially has more application prospect.Actually water-coal-slurry
Gasification, which has obtained comparing, to be widely applied.The nearly all chemical fertilizer of China be all by hydrogen production from coal gasification, further synthesis ammonia and then
Produce various chemical fertilizer.
Current business wet gas stove has strict requirements to raw material water-coal-slurry, for example, require ensuring water-coal-slurry
Its solids content is as high as possible to ensure high heating value and high gasification efficiency in the case of flow stability；Also require water coal simultaneously
Ash content in slurry is as low as possible, to reduce refractory brick of the lime-ash to composition gasification furnace furnace wall of high temperature gas flow entrainment in gasification furnace
Wash away erosion because the oxide of the metal such as iron, calcium, magnesium in ash content can penetrate into concurrent biochemical reaction inside refractory brick,
Cause refractory brick internal defect, intensity declines, and causes refractory brick to deteriorate.
Above-mentioned strict demand to water-coal-slurry causes current coal gasification industrially can only be with fat coal as preparation water-coal-slurry
Raw material, wherein the index of the fat coal is as follows：Calorific value is higher than 4500 kcal/kg, and content of ashes is less than 20wt%.Water coal
Starch gasification furnace can not working process colm, largely limit the application of coal-water slurry gasification.Meanwhile, high-quality
The yield of coal is reduced increasingly and cost is higher, and has substantial amounts of colm can not obtain except as family's fuel in colliery
Outside effective utilization.Colm typically at least has one of following characteristics：High, the fixed carbon content of content of ashes is low, ashless
Dry high, the grey softening temperature of base volatile matter content relatively low, larger flue dust, easy coking, gangue content height, heating are produced during burning
Measure low (caloric value is usually less than 4500 kcal/kg), etc..For the sake of unification, colm is defined as to include in the present invention
The coal of the combustible of carbon containing-hydrogen and at least 20wt% mineral matter impurity.For example, colm can be washing in coal, coal slime or
Gangue.This area can prepare the technology of qualified water-coal-slurry in the urgent need to a kind of using colm as raw material, but inferior
The characteristics of coal is that mineral matter impurity content is high (being generally greater than 20wt%, such as 25-45wt%), and calorific value is low, after it is directly crushed
It is not used to prepare qualified water-coal-slurry to supply existing gasification furnace.Necessary purification processes must be carried out to colm to incite somebody to action
The combustible of carbon containing-hydrogen therein is sufficiently separated with mineral matter, is possible to prepare high-quality water-coal-slurry by raw material of colm.
Mineral matter impurity present in raw coal is broadly divided into two kinds, wherein the first be original timber in coalification course by
The soil or rock powder being mixed into surrounding formation environment, it is mixed with the combustible of carbon containing-hydrogen in raw coal with macro-scale,
And combination degree is relatively weak.It is another be original timber in its growth course inherently by root system of plant from initial soil
The mineral matter micronutrient element of absorption, because of itself and timber symbiosis, therefore the combustible of this part mineral matter impurity and carbon containing-hydrogen with
Micro-scale is mixed and combined closely.Conventional coal cleaning process and coal preparation technique can only be miscellaneous by the mineral matter of the first in raw coal
Matter carries out initial gross separation, but can not be by the combustible and second of ore deposit of the carbon containing-hydrogen being fitted together to each other with micro-scale in raw coal
Material impurities carry out effectively separation, especially true for colm.In addition, in the water-coal-slurry of prior art, generally only will
Raw coal is crushed to 60-100 microns, because reducing granularity again, then cost increases severely, and process overall efficiency can not improve many
It is few, lose more than gain.
The a large amount of mineral matter residues of existing coal gasifier also by-product, how to handle these mineral matter residues is also coal gasification enterprise
One Tough questions of industry.These usual mineral matter residues are suitable only for being used as most low raw material for brickmaking or cement processed
Or pave the way, but if if not having brick field or cement plant near coal gasification plant, then high cost of transportation causes it can not
It is actually utilized.Also it has further been proposed and existed with these mineral matter residues as soil and fertilizer or soil conditioner, but problem
In these mineral matter residues have passed through and be sintered or even vitrifying by abundant after the hot environment in gasification furnace, therein to have
With mineral trace element it is difficult to discharge under field conditions (factors), therefore it is difficult to be absorbed by root system of plant, and it is used as fertilizer
The effect of material or soil conditioner is extremely limited.Comprehensive various factors, these mineral matters of a large amount of by-products of coal gasification plant institute are residual
Slag can only be abandoned processing, and there is no other use for it, has not only caused environmental pollution but also can not therefrom reclaim economic value.
Present invention seek to address that above-mentioned all problems.
The content of the invention
First aspect present invention provides a kind of utilization coal or gangue produces the technique of high heating value water-coal-slurry, wherein described
The combustible of coal or gangue comprising non-flammable mineral matter and carbon containing-hydrogen, the technique comprises the following steps：
A, by coal or gangue in water wet-milling to particulate matter average grain diameter be less than 500 microns, then continue wet-milling
During add additive and be sufficiently mixed and be uniformly dispersed in water-coal-slurry, obtain the micro-nano water-coal-slurry containing additive；
B, the microbubble that diameter is less than 200 microns is passed through into the micro-nano water-coal-slurry containing additive, wherein sticking
The mineral particle of the additive is reunited and sunk as underflow, wherein the flammable composition granule of carbon containing-hydrogen is with bubble
It is floating to turn into floating logistics, it is achieved in the separation of the flammable composition granule of carbon containing-hydrogen and mineral particle；
C, the flammable composition granule of the carbon containing-hydrogen separated from floating logistics, calorific value is hybridly prepared into through press filtration
High heating value water-coal-slurry higher than 4000 kcal/kg.
Wherein, the additive is hydrophilic nanoparticles, collecting agent or surfactant, wherein the hydrophilic nano
Particle is aluminosilicate nanoparticles, is received preferably by the separated mineral particles out of step B are further ground to
Metrical scale scope and be made；Wherein described collecting agent be organic thio compounds be preferably alkali metal alkyl dithiocarbonic acids
Salt, such as alkyl dithiocarbonic acids sodium or alkyl potassium dithiocarbonate；Wherein described surfactant be with hydrophilic radical and
The surface active molecules of hydrophobic grouping, preferably terpenic oil, camphorated oil, phenolic acid mixed fatty alcohol, isomery hexanol, octanol, ether alcohol,
Ester.The effect of wherein described surfactant is oriented attachment in water-air interface, the surface of the reduction aqueous solution
Power, makes to be filled with the air in water and is easy to disperse into bubble and stablizes bubble.
Also include in wherein described additive：PH adjuster and flocculant.Wherein described pH adjusting agent such as lime, carbon
Sour sodium, sodium hydroxide and sulfuric acid, its role is to adjust the acid-base value of micro-nano water-coal-slurry, to control mineral surfaces characteristic, ore deposit
Chemical composition and the action condition of other various medicaments are starched, so as to improve flotation effect；Wherein described flocculant for example poly- third
Acrylamide and starch, its role is to make mineral fine grained be gathered into bulky grain, to accelerate its sinking speed in water；Utilize
Selective flocculation carries out flocculate-desliming and flocculation-flotation.
Wherein, the coal or gangue are ground into average grain diameter in step and are less than 500 microns, preferably smaller than 400
Micron, preferably smaller than 300 microns, preferably smaller than 200 microns, preferably smaller than 100 microns, preferably smaller than 50 microns, preferably smaller than
20 microns, the particulate matter of preferably smaller than 10 microns of particle, preferably smaller than 5 microns.
The microbubble is produced by microbubble generator in stepb, and microbubble a diameter of a few micrometers to 200 is micro-
Rice, preferably a few micrometers to some tens of pm, the average grain diameter of the diameter of more preferably described microbubble in coal or coal gangue particle
In the range of 50% to 200%.
The present inventors have additionally discovered that, either fat coal or colm or gangue, it is generally broken after grain diameter
It can just cause the flammable composition granule of carbon containing-hydrogen therein with non-flammable mineral particle in follow-up microbubble during less than 500 microns
Separated significantly in floatation process, grain diameter is thinner, and microbubble diameter and particle diameter it is more suitable (such as described microbubble
Diameter is in the range of the 50% to 200% of coal or the average grain diameter of coal gangue particle), then the two in follow-up microbubble floatation process
Separating effect is better.Therefore, for colm or gangue, then less than 500 microns, preferably 400 microns are preferably generally crushed to
Hereinafter, preferably less than 300 microns, preferably less than 200 microns, such as more preferably less than 100 microns, 80 microns, preferably 30
Microns, more preferably 10 microns, most preferably less than 5 microns so that the flammable composition granule of wherein carbon containing-hydrogen with not
Combustion property mineral particle can be well separated in follow-up ventilation bubble floatation process.It is especially applicable to colm or bastard coal
Masonry is that raw material prepares high heating value water-coal-slurry and byproduct mineral matter matter composite fertilizer.
The coal is selected from fat coal of the caloric value higher than 4500 kcal/kg or caloric value is less than 4500 kcal/kg
Colm, wherein the colm includes coal or coal slime or gangue in washing.
Second aspect of the present invention is related to a kind of high heating value water-coal-slurry, and its calorific value is higher than 4000 kcal/kg, based on butt hundred
Divide than meter, its is flammable, and solid content is higher than 55wt%, preferably above 60wt%；Its content of ashes is less than 10wt%, preferably shorter than
5wt%；The particle diameter of hydrocarbon combustible material particle contained therein is less than 500 microns, preferably smaller than 400 microns, preferably
Less than 300 microns, preferably smaller than 200 microns, preferably smaller than 100 microns, preferably smaller than 50 microns, preferably smaller than 20 microns, it is excellent
Particle of the choosing less than 10 microns, preferably smaller than 5 microns.The high heating value water-coal-slurry by the technique described in first aspect present invention come
Prepare.
Third aspect present invention be related to foregoing high heating value water-coal-slurry as coal gasifying process raw material purposes, its be used for
One of lower purposes or combination：By the use of colm or gangue as raw material, oxygen consumption is reduced, energy consumption is reduced or improves gasification effect
Rate；Or foregoing high heating value water-coal-slurry is used as the purposes of coal water slurry boiler fuel, it is used to reduce the nitrogen oxides of boiler, sulphur oxygen
Compound and/or granular material discharged.
Fourth aspect present invention is related to a kind of coal gasifying process, comprises the following steps：
A, using the technique described in first aspect present invention, utilize coal or gangue production high heating value water-coal-slurry；
B, will the high heating value water-coal-slurry send into gasification furnace in gasified.
Preferably, above-mentioned coal gasifying process can use colm or gangue as the raw material for preparing water-coal-slurry.
Beneficial effects of the present invention：
1, so far, colm is not used to coal water slurry gasification and is annoying coal gasification field always.Coal water slurry gasification is operated
Reliable and stable is the first choice of gasification technology；But Chinese many places can reach coal water slurry gasification to ature of coal because of no fat coal
It is required that some industry such as chemical fertilizer industries, methanol and other chemicals based on coal gasification are manufactured, and coal liquifaction, coal system
The industry such as gas can not be using ripe and stable coal water slurry gasification technology.The present invention solves this pain in coal gasification field
Point, in particular so that colm or gangue can be not only used for coal water slurry gasification, and can be with by-product micro element mineral
Composite fertilizer；Therefore the present invention can make the profit margin of the fertile technique of coal gasification inhibition and generation be multiplied.
2nd, the present invention expects that coal or colliery powder are broken into granularity is less than 500 microns of particle first, and it was unexpectedly observed that
When coal or gangue, especially colm, it is crushed to after this particle size range, and is aided with step B of the present invention, its
In hydrocarbon combustible material particle and mineral matter impurity particle can particle level realize almost completely divide each other
From, had been surprisingly found that based on this, then coordinate with micro-nano bubble flotation technology, can be efficiently by the hydrocarbon in colm
Combustible material particle is separated with mineral matter impurity particle.This point breaches the conventional thought of those skilled in the art significantly.
Especially to colm or gangue, limited by art technology prejudice, technical staff is at all raw material with it without motivation
To prepare high heating value water-coal-slurry, also no motivation goes to contemplate prepares mineral compound fertilizer with it.The present invention can be suitably used for colm
Or gangue, this is its important breakthrough relative to prior art, because all coal gasifiers all can not be with bad so far
Matter coal and must use fat coal as the raw material for preparing water-coal-slurry, and appearance of the invention greatly extends existing coal gas
The raw material for changing stove uses scope, and without doing any transformation in itself to existing coal gasifier, need to only add before coal gasifier
Plus the process equipment of production high heating value water-coal-slurry of the present invention.
3rd, because the present invention realizes efficiently separating for carbon fuel particle in colm and mineral matter impurity particle, therefore base
In it is separated go out the low granularity of low ash content high-purity carbonaceous fuel particle and to prepare solid content first even high higher than 55wt%
In 60wt% high-concentration coal-water slurry, higher than 4000 kcal/kg water-coal-slurry of its calorific value, its content of ashes can as little as 10wt% with
Under, even as low as below 2wt% has broken the technology prejudice that above-mentioned high heating value water-coal-slurry can only always be prepared with fat coal.
Certainly, if being used as the raw material of technical scheme using fat coal, the calorific value for the water-coal-slurry prepared can also be more
It is high.In addition, oxygen consumption, energy consumption (with coal consumption meter) analysis based on actual production data know that the solid content in water-coal-slurry is often improved
2%, than oxygen consumption, every 1000 cubes can reduce about 20 cubes, and 1000 cubes more every than coal consumption reduce about 16 kilograms；And same anti-
Under the conditions of answering, the content of ashes in water-coal-slurry often reduces by 1%, and oxygen consumption about reduction plus 0.7-0.8%, coal consumption about reduce 1.3-
1.5%.Therefore, the present invention realizes the content of ashes of more than 55wt% solid content and below 10wt% in water-coal-slurry, to drop
Hypoxemia consumes and coal consumption is of great importance.
4th, the present invention is less than 200 microns using diameter first, is preferably that a few micrometers of microbubbles to some tens of pm are steeped
Foam flotation, the more preferably microbubble suitable with coal particle using diameter carry out froth flotation.In coal preparation technique before, made
Bubble diameter is mostly at hundreds of microns to thousands of microns, and never someone can expect can be had using so small microbubble
Hydrocarbon combustible material particle is sufficiently separated by effect ground with mineral matter impurity particle, can not especially be expected so
Hydrocarbon combustible material particle in colm or gangue and mineral matter impurity particle can be sufficiently separated.
5th, the mineral matter impurity particle in the present invention is to be separated before gasification furnace is entered with hydrocarbon combustible material
Open, it is simultaneously handled, therefore mineral matter contained therein is easy under field conditions (factors) without the high temperature sintering in gasification furnace
Discharge and absorbed by root system of plant.Consider the source of these mineral matter impurity then it is seen that, wherein foregoing second
Kind of mineral matter impurity exactly mineral matter nutritional material of the time immemorial trees absorbed in the time immemorial soil and be present in time immemorial timber
In, and undergo the geology coalification of complexity and become current mineral matter impurity.Therefore, these mineral matter impurity are substantially
It is effectively to be absorbed by time immemorial trees and preserve mineral matter fertilizer so far.So valuable time immemorial fertilizer is but in current coal gas
Change is become not absorbed by current plant in stove by high temperature sintering, is tantamount to a kind of loss.The ore deposit of institute's by-product of the present invention
Material impurities particle, exactly avoids the high-temperature sintering process of mineral matter impurity particle, but retains depositing for its time immemorial ecosystem
In form, reverted to by a series of Biochemical processes close to the form in time immemorial soil, be then used as plant ore deposit
Material trace element compound fertilizer, or further loaded after other plant nutrient as fertilizer as carrier, exactly become
Waste be changed into values and realizes a kind of creative new way that coal resources are maximally utilized.
Brief description of the drawings
Fig. 1 is the process chart that the utilization coal or gangue of the present invention produce the technique of high heating value water-coal-slurry.
Fig. 2 is the structural representation for receiving micro- separation equipment used in the present invention.
Fig. 3 be the present invention before typical coal-water slurry gasification schematic flow sheet.
Fig. 4 is using micro-nano isolation technics of the present invention, can effectively utilize the coal water slurry gasification modified technique flow of colm
Schematic diagram.
Embodiment
Present disclosure is further described below by embodiment, but it is not thereby limiting the invention.
Embodiment 1
Used colm is the mud coal that content of mineral substances is 30wt%, and it is transported in disintegrating machine and tentatively broken
After broken, import and particle diameter is ground in wet milk less than 50 microns, add water and additive carries out wet-milling and sized mixing.The water coal prepared
Slurry is stored in water-coal-slurry holding vessel, and the addition of water-coal-slurry is controlled by water-coal-slurry weighing instrument.By water-coal-slurry feed pump and water
Water-coal-slurry is delivered in micro-nano separation equipment by coal slurry feed-line with 0.3MPa pumping pressure.
The grading principle of micro-nano separation equipment is dry in fluidizing fluid based on particle surface properties difference and particle
Sedimentation principle is disturbed, the separation of hydrocarbon combustible material particle and mineral matter impurity particle is realized using compound force field.It is tied
Structure as shown in Fig. 2 plus the water-coal-slurry 1 after the stirring of micro-nano additive fed by the slave unit middle and upper part of ore deposit distributor 2, it is uniform defeated
It is sent in micro-nano splitter 3, is slowly moved downward according to the section of micro-nano splitter 3.Gases at high pressure 7 are pressed by air compressor machine
Enter oil-containing bubble generator 5；Hydrophobic auxiliary agent 6 is injected into oil-containing bubble generator 5 simultaneously, in the inside shape of oil-containing bubble generator 5
Into the micro-nano bubble for containing hydrophobic auxiliary agent 6.The diameter generated is less than 100 microns of bubble from the bottom of micro-nano splitter 3
Microbubble distributor 4 is fed, and the bubble of rising collides with the particle declined, and it is flammable to be spread evenly over hydrocarbon
The surface of material granule, so as to become mineral laden bubble.So just constructed inside micro-nano splitter 3 bubble and
The dynamic collision of grain and isolating environment.Hydrophobic ore particle is invested on bubble, and together rises to froth bed with bubble, is filled via collecting
8 discharges are put, the micro-nano hydrocarbon solid fuel particle 9 of cleaning is obtained；And mineral particle is hydrophilic ore particle, make in gravity
Discharged, efficiently separated so as to realize as mine tailing by underflow 10 under.Generally micro-nano splitter, 3 points are two regions：Between
Collecting area, froth-slurry interface to the selected area between overfall between froth-slurry interface and bubble generator.
In collecting area, mainly bubble mineralization process, and selected area is the secondary enrichment of mineralized froth, and the addition of flushing water 11 is further
Eliminate the dirt of mechanical entrapment in foam.
After the flammable composition granule of the carbon containing-hydrogen and foam fraction factor, through press filtration, some conventional additions are mixed and added into
Agent just can be configured to solid content be not less than 60wt%, calorific value be not less than 4500 kcal/kg, suspending stabilized water-coal-slurry,
Then, water-coal-slurry is delivered in gasification furnace by water-coal-slurry feed pump and water-coal-slurry feed-line.It is typical in the prior art
Coal-water slurry gasification flow is as shown in Figure 3.Using micro-nano isolation technics of the present invention, it can effectively utilize colm and the micro- ore deposit of by-product
The coal water slurry gasification modified technique flow of composite fertilizer is as shown in Figure 4.In gasification furnace, water-coal-slurry is blended into promoting the circulation of qi with space division oxygen
Change, regulation gasification furnace technology is optimal state production synthesis gas with device parameter.Synthesis gas enters waste heat boiler or Quench is filled
In putting, the waste heat of gasifying gas is made full use of with the high steam circulatory system by intaking, lime-ash is via the automatic row of tapered end control
Go out.The crude synthesis gas of production discharges buck through water scrubber shower, and final production can meet the Material synthesis of downstream product production
Gas.Micro-nano separation equipment underflow product enters in concentrating and precipitating pond, and sedimentation basin underflow enters filter press, adds flocculant and is pressed
Filter dehydration, filter press inlet amount implementing monitoring, sedimentation basin overflow enters circulation with filter press filtrate and reused jointly.
Filter press filter cake enters in biochemical reaction tank, and the N P and K of plant demand is adjusted and required micro- according to market application requirement
Secondary element, each addition is monitored in real time by Weighing system, a series of Biochemical processes such as is fermented by probioticses, most throughout one's life
Chan Wei ore deposits composite fertilizer.
Embodiment 2
Used colm is the lignite that content of mineral substances is 20wt%, and it is transported in disintegrating machine and tentatively broken
After broken, import and particle diameter is ground in wet milk less than 450 microns, add water and additive carries out wet-milling and sized mixing.The water prepared
Coal slurry is stored in water-coal-slurry holding vessel, and the addition of water-coal-slurry is controlled by water-coal-slurry weighing instrument.By water-coal-slurry feed pump and
Water-coal-slurry is delivered in micro-nano separation equipment by water-coal-slurry feed-line with 0.3MPa pumping pressure.
Still use equipment and operating method as shown in Figure 2.It is less than 200 microns for the bubble diameter that micro-nano is separated.Will
After the hydrocarbon combustible material particle and foam fraction factor, adding some conventional additives just can be configured to solid content not
Less than 60wt%, calorific value is not less than 4100 kcal/kg, suspending stabilized water-coal-slurry.Water-coal-slurry conveying, gasification reaction mistake
Journey and Wei Kuang composite fertilizers preparation process and all same of embodiment 1.
Embodiment 3
Used gangue is coal in the washing that content of mineral substances is 40wt%, and it is transported in disintegrating machine and carried out just
After step is broken, imports and particle diameter is ground in wet milk less than 100 microns, add water and additive carries out wet-milling and sized mixing.Prepare
Water-coal-slurry be stored in water-coal-slurry holding vessel, the addition of water-coal-slurry is controlled by water-coal-slurry weighing instrument.Fed by water-coal-slurry
Water-coal-slurry is delivered in micro-nano separation equipment by pump and water-coal-slurry feed-line with 0.3MPa pumping pressure.
Still use equipment and operating method as shown in Figure 2.It is less than 80 microns for the bubble diameter that micro-nano is separated.By institute
State after hydrocarbon combustible material particle and foam fraction factor, adding some conventional additives, just can be configured to solid content not low
In 58wt%, calorific value be not less than 4000 kcal/kg, suspending stabilized water-coal-slurry.Water-coal-slurry conveying, gasification reaction process
And Wei Kuang composite fertilizers preparation process and all same of embodiment 1.
Embodiment 4
Used gangue is the coal slime that content of mineral substances is 50wt%, and it is transported in disintegrating machine and tentatively broken
After broken, import and particle diameter is ground in wet milk less than 50 microns, add water and additive carries out wet-milling and sized mixing.The water coal prepared
Slurry is stored in water-coal-slurry holding vessel, and the addition of water-coal-slurry is controlled by water-coal-slurry weighing instrument.By water-coal-slurry feed pump and water
Water-coal-slurry is delivered in micro-nano separation equipment by coal slurry feed-line with 0.3MPa pumping pressure.
Still use equipment and operating method as shown in Figure 2.It is less than 80 microns for the bubble diameter that micro-nano is separated.By institute
State after hydrocarbon combustible material particle and foam fraction factor, adding some conventional additives, just can be configured to solid content not low
In 56wt%, calorific value be not less than 4000 kcal/kg, suspending stabilized water-coal-slurry.Water-coal-slurry conveying, gasification reaction process
And Wei Kuang composite fertilizers preparation process and all same of embodiment 1.
Embodiment 5
Used gangue is the gangue that content of mineral substances is 70wt%, and it is transported in disintegrating machine and carried out tentatively
After broken, import and particle diameter is ground in wet milk less than 30 microns, add water and additive carries out wet-milling and sized mixing.The water prepared
Coal slurry is stored in water-coal-slurry holding vessel, and the addition of water-coal-slurry is controlled by water-coal-slurry weighing instrument.By water-coal-slurry feed pump and
Water-coal-slurry is delivered in micro-nano separation equipment by water-coal-slurry feed-line with 0.3MPa pumping pressure.
Still use equipment and operating method as shown in Figure 2.It is less than 30 microns for the bubble diameter that micro-nano is separated.By institute
State after hydrocarbon combustible material particle and foam fraction factor, adding some conventional additives, just can be configured to solid content not low
In 55wt%, calorific value be not less than 4000 kcal/kg, suspending stabilized water-coal-slurry.Water-coal-slurry conveying, gasification reaction process
And Wei Kuang composite fertilizers preparation process and all same of embodiment 1.
Embodiment above describes the general principle and principal character and advantages of the present invention of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally
The principle of invention, rather than the scope of the present invention is limited in any way, without departing from the scope of the invention, the present invention
Various changes and modifications are also had, these changes and improvements are both fallen within claimed scope.
Claims (10)
1. a kind of utilization coal or gangue produce the technique of high heating value water-coal-slurry, wherein the coal or gangue are comprising non-flammable
The combustible of mineral matter and carbon containing-hydrogen, it is characterised in that the technique comprises the following steps：
A, by coal or gangue in water wet-milling to particulate matter average grain diameter be less than 500 microns, continue wet-milling during
Adding additive is sufficiently mixed it in water-coal-slurry to be uniformly dispersed, obtain the micro-nano water-coal-slurry containing additive；
B, the microbubble that diameter is less than 200 microns is passed through into the micro-nano water-coal-slurry containing additive, wherein having sticked institute
State additive mineral particle reunite and sink as underflow, wherein the flammable composition granule of carbon containing-hydrogen with bubble floating into
For floating logistics, flammable composition granule and the separation of mineral particle of carbon containing-hydrogen are achieved in；
C, the flammable composition granule of the carbon containing-hydrogen separated from floating logistics, through press filtration, be configured to calorific value higher than 4000
Kcal/kg high heating value water-coal-slurry.
2. according to the method described in claim 1, it is characterised in that the additive be hydrophilic nanoparticles, collecting agent or
Surfactant, wherein the hydrophilic nanoparticles be aluminosilicate nanoparticles, preferably by by step B it is separated go out
The mineral particle come is further ground to nanoscale scope and is made；Wherein described collecting agent is organic thio compounds
The preferably alkyl dithiocarbonate of alkali metal；Wherein described surfactant is the table with hydrophilic radical and hydrophobic grouping
Face bioactive molecule, preferably terpenic oil, camphorated oil, phenolic acid mixed fatty alcohol, isomery hexanol, octanol, ether alcohol, Ester.
3. according to the method described in claim 1, it is characterised in that also include in wherein described additive：
PH adjuster, such as lime, sodium carbonate, sodium hydroxide and sulfuric acid；With,
Flocculant, such as polyacrylamide and starch.
4. according to the method described in claim 1, it is characterised in that be in step ground into the coal or gangue flat
Equal particle diameter is less than 500 microns, is preferably smaller than 400 microns, is preferably smaller than 300 microns, is preferably smaller than 200 microns, preferably smaller than 100
Micron, preferably smaller than 50 microns, preferably smaller than 20 microns, the particle of preferably smaller than 10 microns of particle, preferably smaller than 5 microns
Thing；A diameter of a few micrometers to 200 microns of the microbubble, more preferably preferably a few micrometers to some tens of pm, institute in stepb
The diameter of microbubble is stated in the range of the 50% to 200% of coal or the average grain diameter of coal gangue particle.
5. according to the method described in claim 1, it is characterised in that it also includes step D：By through step C it is separated out
Mineral particle is used as micro- ore deposit composite fertilizer material.
6. according to the method described in claim 1, it is characterised in that wherein described coal is selected from：Caloric value is higher than 4500 kilocalories/thousand
Gram fat coal, or, caloric value is less than 4500 kcal/kg of colm, wherein the colm includes coal or coal in washing
Mud or gangue.
7. a kind of high heating value water-coal-slurry, it is characterised in that its calorific value is higher than 4000 kcal/kg, based on butt percentages, its
Combustible solid content is higher than 55wt%, preferably above 60wt%；Its content of ashes is less than 10wt%, preferably shorter than 5wt%；Wherein
The particle diameter of the flammable composition granule of the carbon containing-hydrogen be less than 500 microns, preferably smaller than 400 microns, preferably smaller than 300 microns, preferably
Less than 200 microns, preferably smaller than 100 microns, preferably smaller than 50 microns, preferably smaller than 20 microns, preferably smaller than 10 microns
Grain, preferably smaller than 5 microns.
8. high heating value water-coal-slurry according to claim 7, it is characterised in that its by the technique described in claim 1 come
Prepare.
9. high heating value water-coal-slurry described in claim 7 is used as the purposes of the raw material of coal gasifying process, its be used for following purposes it
One or combination：By the use of colm or gangue as raw material, oxygen consumption is reduced, energy consumption is reduced or improves gasification efficiency；Or
High heating value water-coal-slurry described in claim 7 is used as the purposes of coal water slurry boiler fuel, its be used to reducing the nitrogen oxides of boiler,
Oxysulfide and/or granular material discharged.
10. a kind of coal gasifying process, it is characterised in that comprise the following steps：
A, using technique according to claim 1, utilize coal or gangue production high heating value water-coal-slurry；
B, will the high heating value water-coal-slurry send into gasification furnace in gasified.
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| CN201710502714.6A CN107267236A (en) | 2017-06-27 | 2017-06-27 | The technique and the coal gasifying process using the technique of a kind of utilization coal or gangue production high heating value water-coal-slurry |
| PCT/CN2018/089958 WO2019001231A1 (en) | 2017-06-27 | 2018-06-05 | Process for producing high calorific value water-coal slurry by utilizing coal or coal gangue, and coal gasification process using same |
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| CN201710502714.6A CN107267236A (en) | 2017-06-27 | 2017-06-27 | The technique and the coal gasifying process using the technique of a kind of utilization coal or gangue production high heating value water-coal-slurry |
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| WO2019001231A1 (en) * | 2017-06-27 | 2019-01-03 | 深圳瑞科天启科技有限公司 | Process for producing high calorific value water-coal slurry by utilizing coal or coal gangue, and coal gasification process using same |
| CN109282299A (en) * | 2018-09-25 | 2019-01-29 | 深圳瑞科天启科技有限公司 | A kind of coal water slurry boiler system and water-coal-slurry preparation and combustion method |
| WO2019056802A1 (en) * | 2017-09-20 | 2019-03-28 | 深圳瑞科天启科技有限公司 | Method for increasing energy density of liquid fuel or gaseous fuel |
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| CN114456859A (en) * | 2022-01-17 | 2022-05-10 | 神华准格尔能源有限责任公司 | Preparation method of raw material coal-water slurry rich in high-alumina ash and preparation method of high-alumina ash |
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| CN111849571A (en) * | 2020-07-28 | 2020-10-30 | 中国矿业大学 | A method for preparing slurry fuel by mixing coal gasification fine residue carbon and biomass rapid pyrolysis oil |
| CN111849571B (en) * | 2020-07-28 | 2022-03-01 | 中国矿业大学 | A method for preparing slurry fuel by mixing coal gasification fine residue carbon and biomass rapid pyrolysis oil |
| CN114456859A (en) * | 2022-01-17 | 2022-05-10 | 神华准格尔能源有限责任公司 | Preparation method of raw material coal-water slurry rich in high-alumina ash and preparation method of high-alumina ash |
| CN115336445A (en) * | 2022-08-16 | 2022-11-15 | 南方科技大学 | Method for improving sand |
| CN115336445B (en) * | 2022-08-16 | 2024-01-09 | 南方科技大学 | A method of improving sandy soil |
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