CN105950238A - System for preparing coal water slurry - Google Patents
System for preparing coal water slurry Download PDFInfo
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- CN105950238A CN105950238A CN201610566742.XA CN201610566742A CN105950238A CN 105950238 A CN105950238 A CN 105950238A CN 201610566742 A CN201610566742 A CN 201610566742A CN 105950238 A CN105950238 A CN 105950238A
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- 239000003245 coal Substances 0.000 title claims abstract description 169
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 96
- 239000002002 slurry Substances 0.000 title abstract description 14
- 239000002245 particle Substances 0.000 claims abstract description 60
- 239000000203 mixture Substances 0.000 claims abstract description 23
- 238000002156 mixing Methods 0.000 claims abstract description 22
- 238000007667 floating Methods 0.000 claims abstract description 7
- 239000010419 fine particle Substances 0.000 claims abstract description 5
- 239000003250 coal slurry Substances 0.000 claims description 72
- 238000000034 method Methods 0.000 claims description 48
- 238000005188 flotation Methods 0.000 claims description 33
- 239000008187 granular material Substances 0.000 claims description 32
- 238000010298 pulverizing process Methods 0.000 claims description 30
- 230000008569 process Effects 0.000 claims description 27
- 238000005192 partition Methods 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 230000017531 blood circulation Effects 0.000 claims description 3
- 230000004087 circulation Effects 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000004088 foaming agent Substances 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 2
- 239000011362 coarse particle Substances 0.000 abstract 2
- 238000005119 centrifugation Methods 0.000 abstract 1
- 238000009826 distribution Methods 0.000 description 36
- 235000019580 granularity Nutrition 0.000 description 28
- 230000000694 effects Effects 0.000 description 25
- 239000000843 powder Substances 0.000 description 23
- 238000000227 grinding Methods 0.000 description 22
- 238000000498 ball milling Methods 0.000 description 20
- 238000005265 energy consumption Methods 0.000 description 17
- 238000005516 engineering process Methods 0.000 description 17
- 239000002817 coal dust Substances 0.000 description 16
- 238000002474 experimental method Methods 0.000 description 15
- 238000012360 testing method Methods 0.000 description 14
- 239000002956 ash Substances 0.000 description 13
- 239000000463 material Substances 0.000 description 11
- 238000002360 preparation method Methods 0.000 description 11
- 239000002994 raw material Substances 0.000 description 9
- 230000008859 change Effects 0.000 description 8
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 229910052500 inorganic mineral Inorganic materials 0.000 description 7
- 239000005864 Sulphur Substances 0.000 description 6
- 230000001186 cumulative effect Effects 0.000 description 6
- 239000012535 impurity Substances 0.000 description 6
- 239000011707 mineral Substances 0.000 description 6
- 235000010755 mineral Nutrition 0.000 description 6
- 239000004484 Briquette Substances 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 239000012141 concentrate Substances 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000010866 blackwater Substances 0.000 description 2
- 238000003776 cleavage reaction Methods 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 229910052683 pyrite Inorganic materials 0.000 description 2
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 2
- 239000011028 pyrite Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000007017 scission Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 235000019752 Wheat Middilings Nutrition 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- SJWFXCIHNDVPSH-UHFFFAOYSA-N octan-2-ol Chemical compound CCCCCCC(C)O SJWFXCIHNDVPSH-UHFFFAOYSA-N 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000010951 particle size reduction Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000011020 pilot scale process Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 238000001238 wet grinding Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/32—Liquid carbonaceous fuels consisting of coal-oil suspensions or aqueous emulsions or oil emulsions
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/28—Cutting, disintegrating, shredding or grinding
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/54—Specific separation steps for separating fractions, components or impurities during preparation or upgrading of a fuel
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/54—Specific separation steps for separating fractions, components or impurities during preparation or upgrading of a fuel
- C10L2290/546—Sieving for separating fractions, components or impurities during preparation or upgrading of a fuel
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Liquid Carbonaceous Fuels (AREA)
- Crushing And Grinding (AREA)
Abstract
The invention provides a system for preparing coal water slurry. The system for preparing coal water slurry comprises a water jet comminuting system, a grading system and a floating system, wherein the water jet comminuting system comprises a water jet comminuting machine, the water jet comminuting machine comprises a mixing chamber, a collimator and a comminuting chamber, and high-pressure water from a water pump system is converted into high-speed jet and mixed with feed coal from a feeding system in the mixing chamber, then enters the collimator to be accelerated, and collides with a target in the comminuting chamber to form a water-coal mixture through comminuting of the feed coal; the grading system is communicated with a discharge outlet of the comminuting chamber to receive and conduct centrifugation treatment on the water-coal mixture from the water jet comminuting machine, so that particles in the water-coal mixture are graded to form coarse particles and fine particles, the coarse particles are located at the position of an underflow port of the grading system, and the fine particles are mixed with water to form fine coal slime which is located at the position of an overflow port of the grading system; the floating system receives the fine coal slime and separates coal particles with high hydrophobicity from coal particles with high hydrophilicity.
Description
Technical field
The present invention relates to the manufacture field of coal, particularly relate to a kind of system for preparing water-coal-slurry.
Background technology
Water-coal-slurry be a kind of by nearly 70% coal dust and the water of nearly 30% and the coal that forms of additive of 1%
Aqueous mixtures.Can pump as liquid form product, be atomized, store, safety is better than oil, again image-stone
Oil equally has good mobility and stability.Water-coal-slurry, as a kind of oil-substituted fuel, can substitute for weight
Oil and crude oil are for boiler, cellar for storing things stove and combustion in IC engine.Have that combustion efficiency is good, be prone to pipeline transportation,
Environment protecting is obvious.The research of COAL-WATER SLURRY TECHNOLOGY, is one of focus with Coal Replacing Oil Technology Research.
To prepare the superfine grinding that water-coal-slurry key is exactly coal efficiently.The superfine grinding of coal and development side thereof
To being to realize the purification of coal, ultrapureization, meet the requirement the highest to coal deep processing.Coal grand
It is heterogeneous for seeing structure, and including organic and inorganic mineral impurity, and its organic matter is by multiple microcosmic
The maceral composition that structure is different, therefore, the microfine processing of coal can be to each grain-size grade with separation process
The Nomenclature Composition and Structure of Complexes of other coal produces impact.Having result of the test to show, the various particle diameters after superfine grinding are ultra-fine
The content of ashes of coal grain, mineral composition and trace element there occurs significant change, to its physical arrangement, combustion
Burn performance and pollutant release has a significant impact.The superfine grinding of coal can make Macerals and the nothing of coal
Machine mineral constituent is effectively dissociated, for major part coal, fully dissociate need to be crushed to 10 μm with
Under.
In the technical process of current preparation water-coal-slurry, broken and pulverising apparatus power consumption accounts for total energy
More than the 70% of consumption.Traditional disintegrating process energy consumption is big, and efficiency is low, and cost is high, seriously polluted.Generally
In disintegrating process, nonproductive merit reaches the 90% of energy consumption the most unexpectedly.Sub-fraction is only had in crushing process
Energy crushing for material, causes the significant wastage of the energy.At present, China prepares water-coal-slurry and all uses
Ball grinding method carries out superfine grinding to coal, and it mainly utilizes ball mill to pulverize.It is former that ball mill is pulverized
Reason is that compacting is pulverized, fatigue is pulverized.But ball mill pulverizing technique can not keep the original graininess of raw material,
And together with impurity crushes completely with raw material, it is difficult to go the removal of impurity.Further, during coal-grinding coal with
The grinding of impurity, the abrasion of crushing medium all can cause the pollution of coal dust, grind for a long time meanwhile,
Also can aggravate the change of coal dust physics, chemical property and surface nature, the separation making next step is increasingly difficult.
This most just becomes the big obstacle limiting China's water-coal-slurry development.
For solving the problems referred to above, carry out the reality utilizing fine Comminuting Micawith High Pressure Water Jet to prepare ultra-thin slurries
Test research.
Summary of the invention
Based on the problems referred to above, the invention provides a kind of system for preparing water-coal-slurry, to reduce energy consumption,
Improve clean coal yield, improve ash disposal desulfurized effect.
This system can produce fine Coal powder body, provides raw material for preparing water Coal Slurry, keeps raw material
Graininess, utilize sorting.
For reaching above-mentioned purpose, the present invention provides a kind of system for preparing water-coal-slurry, including water jet
Crushing system, hierarchy system and floatation system.Nappe flip length system includes the water for forming water under high pressure
Pumping system, for providing charging system and the water jet mill of feed coal.Water jet mill includes mixing
Close room, collimator tube and pulverizing chamber, the water under high pressure from water pump system be converted into high-speed jet and with from adding
The feed coal of material system mix in mixing chamber after enter collimator tube, and in collimator tube accelerate, then with
Target collision in pulverizing chamber makes feed coal pulverize and forms water coal mixtures.Hierarchy system and pulverizing chamber
Discharging opening connects, and to receive the water coal mixtures from water jet mill, and to its centrifugal treating, makes
Gradation in water coal mixtures, forms coarse granule and fine grained, and coarse granule is in the end of hierarchy system
Head piece, the fine particle mixed with water forms fine coal slurry and is in the overfall of hierarchy system.Floatation system connects
Receive fine coal slurry, and coal particle stronger to coal particle stronger for hydrophobicity in fine coal slurry and hydrophilic is separated.
The present invention having the beneficial effects that compared to prior art: the present invention for prepare water-coal-slurry is
In system, feed coal first passes through nappe flip length system and pulverizes, then screens out thinner by hierarchy system
Grain, then it is carried out flotation, isolate the coal particle concentrate meeting granularity requirements.The present invention uses water-jet
Stream crushing system is pulverized, and principle is that stretching is pulverized, joint is pulverized, and dissociative is good, keeps the granule of raw material
Property, be conducive to sorting.With existing employing ball grinding method coal carried out compared with the technique of superfine grinding, this
The energy consumption of the system for preparing water-coal-slurry of invention is substantially reduced, and clean coal yield is high, and is obtained in that more
Good ash disposal desulfurized effect.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that the present invention prepares the system of water-coal-slurry.
Fig. 2 is the flow chart that the present invention prepares coal water slurry process.
Fig. 3 is charging system and the schematic diagram of water jet mill of nappe flip length system.
Fig. 4 is the schematic diagram of the charging system of nappe flip length system.
Fig. 5 is the schematic diagram of the mixing chamber of water jet mill.
Fig. 6 is the schematic diagram of the hydraulic classiciation system of the present invention.
Fig. 7 a-Fig. 7 b is that the system of the preparation water-coal-slurry utilizing the present invention is carried out greatly under the first experiment condition
With coal nappe flip length and ball mill pulverizing effect contrast figure.
Fig. 8 a-Fig. 8 b is that the system of the preparation water-coal-slurry utilizing the present invention is carried out greatly under the second experiment condition
With coal nappe flip length and ball mill pulverizing effect contrast figure.
Fig. 9 a-Fig. 9 b is that the system of the preparation water-coal-slurry utilizing the present invention is carried out greatly under the 3rd experiment condition
With coal nappe flip length and ball mill pulverizing effect contrast figure.
Figure 10 a-Figure 10 b is that the system of the preparation water-coal-slurry utilizing the present invention is carried out under the first experiment condition
Zhao Ge village raw coal nappe flip length and ball mill pulverizing effect contrast figure.
Figure 11 a-Figure 11 b is that the system of the preparation water-coal-slurry utilizing the present invention is carried out under the second experiment condition
Zhao Ge village raw coal nappe flip length and ball mill pulverizing effect contrast figure.
Figure 12 a-Figure 12 b is that the system of the preparation water-coal-slurry utilizing the present invention is carried out under the 3rd experiment condition
Zhao Ge village raw coal nappe flip length and ball mill pulverizing effect contrast figure.
Figure 13 a-Figure 13 b is that the system of the preparation water-coal-slurry utilizing the present invention carries out Fan Ge village raw coal water jet
Pulverize and ball mill pulverizing effect contrast figure.
Detailed description of the invention
It is described more fully with example embodiment referring now to accompanying drawing.But, example embodiment can
Implement in a variety of forms, and be not understood as limited to embodiment set forth herein；On the contrary, it is provided that this
A little embodiments make the present invention more comprehensively and completely, and the design of example embodiment are passed on all sidedly
To those skilled in the art.In the drawings, in order to clearly, may be exaggerated the thickness of region and layer.?
Reference identical in figure represents same or similar structure, thus will omit their detailed description.
Additionally, described feature, structure or characteristic can be combined in any suitable manner one or
In more embodiments.In the following description, it is provided that many details thus provide the reality to the present invention
Execute fully understanding of example.It will be appreciated, however, by one skilled in the art that the technology of the present invention can be put into practice
Scheme and do not have in described specific detail one or more, or can use other method, constituent element,
Material etc..In other cases, known features, material or operation are not shown in detail or describe to avoid
The major technique intention of the fuzzy present invention.
With reference to shown in Fig. 1, the present invention provides a kind of system for preparing water-coal-slurry, including: water jet
Crushing system 1, hierarchy system 2 and floatation system 3.Nappe flip length system 1 includes: water pump system
11, it is used for forming water under high pressure；Charging system 12, is used for providing feed coal；And water jet mill 13.
In the lump with reference to Fig. 3, water jet mill 13 includes mixing chamber 131, collimator tube 132 and pulverizing chamber 133.
Water under high pressure from water pump system 11 is converted into high-speed jet and exists with the feed coal from charging system 12
Mixing chamber 131 enters after mixing collimator tube 132, and accelerates in collimator tube 132, then with pulverizing
Target 134 collision in room 133 makes feed coal pulverize and forms water coal mixtures.
Hierarchy system 2 connects with the discharging opening of pulverizing chamber 133, to receive from water jet mill 13
Water coal mixtures, and to its centrifugal treating, make the gradation in water coal mixtures, form coarse granule
And fine grained, coarse granule is in the underflow opening A1 of hierarchy system 2, and the fine particle mixed with water is formed carefully
Coal slime is in the overfall A2 of hierarchy system 2.
Floatation system 3 receives fine coal slurry and carries out flotation.Coal dust flotation is based on coal and spoil table in fine coal slurry
Face hydrophilic and hydrophobic difference carry out sorting, and its essence is that hydrophobic coal particle sticks on bubble,
Hydrophilic spoil particle residence is in coal slurry, thus realizes separated from one another.The coal particle that wherein hydrophobicity is strong
It is concentrate, as the primary raw material of water-coal-slurry.
The present invention for preparing in the system of water-coal-slurry, feed coal first passes through nappe flip length system and pulverizes,
Screen out thinner granule by hierarchy system again, then it is carried out flotation, isolate and meet granularity requirements
Coal particle concentrate.The present invention uses nappe flip length system to pulverize, and principle is stretching pulverizing, joint powder
Broken, dissociative is good, keeps the graininess of raw material, is conducive to sorting.With existing employing ball grinding method pair
Coal carries out the technique of superfine grinding and compares, and the energy consumption of the system for preparing water-coal-slurry of the present invention drops significantly
Low, clean coal yield is high, and is obtained in that more preferable ash disposal desulfurized effect.
With reference to Fig. 3 to Fig. 5, in the present embodiment, charging system 12 includes charging box 121 and conveying pipe 122,
Charging box 121 has air inlet 123 and charge door 124, and air inlet 123 is opened in charging box 121
Side face, charge door 124 is opened in the bottom of charging box 121, and connects with conveying pipe 122.
In the present embodiment, charging box 121 can be infundibulate, thus improves injection effect.Charging box 121
Side face be uniformly provided with multiple air inlet 123, each air inlet 123 is connected with Pneumatic conveying pipeline 125,
Thus guide air and enter in charging box 121.
Utilize the fluidized bed principle of gas-solid phase, add multiple pneumatic transporting at the middle part of tradition charging box
Send pipe 125, at atmospheric pressure (pa) and water jet mill 13 mixing chamber 131 in low pressure suction (pv)
Under synergy, in charging box 121, solid particle suspends by air force and carries out vertical transport, this
Plant the self-priming air head with air dynamic behaviour, make the abundant fluidization of material of charging box 121,
Increase initial kinetic energy when material particles enters mixing chamber 131, thus improve the mixed of granule and water jet
Close effect.
In the present embodiment, water jet mill 13 also includes first jet 134.Mixing chamber 131 has and shakes
Swing chamber the 1311, first opening the 1312, second opening 1313 and second nozzle 1314, the first opening 143
It is opened in the side in vibration chamber 1311, and connects with one end of first jet 134, the second opening 1313
Being opened in the top in vibration chamber 1311, and connect with charge door 124, second nozzle 1314 is opened in and shakes
Swing the opposite side in chamber 1311, and connect with collimator tube 132.High-speed jet is via first jet 134 and
One opening 1312 enters vibration chamber 1311, with the feed coal from charging system 12 in mixing chamber 131
Through being entered collimator tube 132 by second nozzle 1314 after mixing.
Wherein, first jet 134 is in infundibulate, and the internal diameter of its other end opening is interior more than one end open
Footpath.Second nozzle 1314 part stretches in vibration chamber 1311, the neighbouring vibration in the end of second nozzle 1314
One sidewall in chamber 1311, forms the impact walls of inclination between end and this sidewall of second nozzle 1314.
The internal diameter D of the one end open of first jet 1341Equal to the internal diameter of the first opening 1312 and less than the second spray
The internal diameter D of mouth 13142, the internal diameter D of second nozzle 13142Height D less than vibration chamber 1311.
According to the achievement in research of high-pressure water jet infrared thermal imagery, great Wo district is positioned at the beginning of high-pressure water jet
Beginning section, accordingly, adjusts the lateral dimension size of mixing chamber 131, makes jet great Wo district be positioned at mixing chamber 131
Inside, thus the dilution zone of granule and water jet is designed in the great Wo district of turbulent jet flow, with ensure granule with
Being sufficiently mixed of material.
The operation principle of water jet mill 13 is that water under high pressure forms one stable high speed by top nozzle
Water jet vibrates chamber 1311 through Helmholtz, and due to the viscous effect of fluid, high-speed jet is at mixing chamber
Produce in 131 and there is certain thickness jet shear layer, and in shear layer, produce vortex.When pressure is disturbed
Dynamic frequency vibrate close to Helmholtz the natural frequency in chamber 1311 time, this disturbance is put in shear layer
Greatly, vortex is presented in collar vortex and move downstream, and material is penetrated in volume attraction.Material is inhaled at volume in big whirlpool
Time, abrasive material being wrapped in the inside of jet beam, such abrasive particle is fully accelerated, and to reduce right simultaneously
The abrasion of abrasive jet and the energy loss caused due to friction.
In mixing chamber 131 formed abrasive flows hence into collimator tube 132, in collimator tube 132 due to
The existence in big whirlpool, makes granule shape in groups be distributed, and granule gradually accelerates.Collimator tube 132 be one isometrical
Long straight tube, suitably select collimator tube 132 length, while granule can be made fully to be accelerated, cavity
Come into being and grow up the most further.Ultimately form the jet with a succession of water body being disconnected, water body has contained
There are material particles and cavity, are by gas, the pulse cavitating jet of solid, liquid three phase composition.
Pulverizing chamber is target formula pulverizing chamber, the gas-solid dual-phase jet formed in collimator tube 132, arrives and pulverizes
Room and hard target strong collision so that feed coal is pulverized and formed water coal mixtures.
As it is shown in figure 1, also include blood circulation 4 for preparing the system of water-coal-slurry, itself and hierarchy system 2
Underflow opening A1 connection, through circulation force (forcing) pump 41 coarse granule is transmitted water jet mill.
Fig. 6 shows that the schematic diagram of hydraulic classiciation system, hierarchy system 2 include force (forcing) pump 22 and waterpower rotation
Stream device 21, water coal mixtures is pressed into classification after centrifugal rotation in hydrocyclone 22.
Wherein, hydraulic classiciation system may also include effusion meter 23, Pressure gauge 24, stopwatch, water tank 25 etc..
With water, the coal grain that certain particle size is distributed being proportionally added into water tank 25 stir, pressurized pump 22 enters
Cyclone 21 classification.Satisfactory fine grained flows out into flotation flowsheet at overfall；Coarse granule exists
Underflow opening flows into water tank, then after force (forcing) pump 26 pressurizes, is sent into water jet mill 13 wheat-middlings again by circulation
Broken.
Hydrocyclone is the equipment utilizing centrifugal sedimentation principle to carry out classification, ore pulp under a certain pressure from
Charging aperture tangentially feeds cyclone, strongly rotates under the guide functions of shell of column wall, fine grained in ore pulp
Being discharged by overfall, coarse granule is discharged by spigot, thus realizes the classification of size particles.Due to water-jet
It is waterproof pulverization that stream is pulverized, and its product is discharged from the discharging opening of pulverizer with the form of water-coal-slurry, Qi Zhongshui
Material ratio about 8:2.Therefore, the selection waterpower that is suitable in the system preparing water-coal-slurry in the present invention is divided
Level.
Hydrocyclone diameter is to control cyclone disposal ability and the major parameter of partition size, processes energy
Power and partition size all increase with hydrocyclone diameter and increase.In the graded operation of duff granule,
Should meet certain partition size requirement, require again the biggest disposal ability, this is accomplished by pool and examines
Consider.In the present embodiment, square being directly proportional of the production capacity of hydrocyclone and its diameter, partition size
It is directly proportional to 1/2 power of its diameter.
Fluid resistance in hydrocyclone strengthens with the increase of cone angle, owing to resistance increases, necessarily leads
Cause the reduction of disposal ability.Meanwhile, partition size also strengthens with the increase of cone angle.So, determine water
During power cyclone cone angle, production capacity and partition size is needed to take into account.During fine grading, waterpower
The optimum taper angle of cyclone should be about 20 degree, only when requiring the thinnest overflow of partition size, just uses
Small-angle hydrocyclone (θ≤10 degree).In the present embodiment, require to reach 10 μm at coal dust partition size
In the case of, production capacity requires to reach maximum, so hydrocyclone cone angle is defined as 15 degree.
Overfall tube diameter for classification hydrocyclone is affect production capacity and partition size most important
One of parameter.Within the specific limits, the increase of overfall tube diameter will cause the increase of partition size, raw
The increasing of production capacity power.In the structure of hydrocyclone designs, overfall tube diameter and hydrocyclone diameter,
Feed port diameter, underflow tap diameter is proportional.In the present embodiment, overfall tube diameter is hydraulic cyclone
0.2 0.3 times of device diameter.Preferably, in order to obtain the biggest spillway discharge, overfall tube diameter is true
It is set to 25mm.Feed port diameter should be overfall tube diameter 0.5～1 times, is defined as 20mm.
Hydrocyclone underflow tap diameter, in the case of hydrocyclone diameter and overfall tube diameter determine,
Its change directly decides the change of overflow ratio, and the production capacity that the change of overflow ratio is to hydrocyclone
With partition size important.The increase of underflow tap diameter, can make hydrocyclone production capacity add
Greatly, partition size reduces.But sand setting amount also can be made to increase simultaneously, the reduction of underflow tap diameter, underflow opening
Concentration can strengthen, when underflow tap diameter minimizes, concentration is not further added by, but there will be underflow block up
The phenomenon of plug.Rule of thumb parameter, determines that underflow tap diameter is respectively 6mm.
Floatation system is that the granularity that meets obtained by the overfall A2 of hydrocyclone is wanted by floatation process
The fine breeze asked obtains ultra-clean coal dust (hyperfine coal dust) by flotation.Floatation process can be effective
In removing coal, impurity is as silicate, pyrite etc., and its principle is the hydrophilic according to mineral surfaces and dredges
The difference of aqueous, separates mineral.As it is shown in figure 1, in the present embodiment, floatation system 3 wraps
Including flotation device 31, fine coal slurry 100 stirs in flotation device 31 and carries out flotation, adds and catch in flotation device 31
Receiving agent and foaming agent, in floatation process, the fine coal slurry of turbulent motion makes air pulverize as bubble, bubble with
Coal particle in fine coal slurry collides or contacts, and the coal particle that hydrophobicity is strong is attached to bubble surface and rises floating
To fine coal slurry liquid level, scrape and be collected into water-coal-slurry 110；The coal particle that hydrophilic is strong remains in fine coal slurry
In, become mine tailing 120.
Fig. 2 shows that the present embodiment prepares the flow chart of coal water slurry process, and with reference to Fig. 1, first by former
Coal is crushed to the feed coal of granularity≤1mm；Then sent into water jet mill 13 by charging system 1 to enter
Row pulverizing 133；During high pressurewater cleaning, grain breakage is mainly by granule impact effect, powder
Broken rear particle size distribution is uneven, needs to pulverize for the granule that granularity is bigger again.It is thus desirable at water jet
The discharging opening of pulverizer 133 couples hierarchy system, will meet the fine grained of granularity requirements from hydrocyclone
The overfall A2 of 21 collects the product processed as flotation；Fine breeze, after flotation, obtains fine
Water-coal-slurry 110, can as preparation Coal Slurry raw material.More than granularity requirements coarse granule then by
Cyclone underflow opening A1 pressurizes through the cyclically charging pump 41 of blood circulation 4, returns to water jet mill
The charging box of 13, pulverizes again.
The system being used for preparing water-coal-slurry of the present invention can be used for processing different types of raw coal, individually below
Three kinds of raw coal are processed by system and existing ball-milling technology with the present invention, and carry out comparative analysis.
One, nappe flip length and hydraulic classiciation interpretation of result
1, Datong District's raw coal (the first experiment condition)
Datong coal ball milling after 1 hour coal sample size distribution with nappe flip length and under 0.1MPa pressure water
After power cyclone classification, coal sample size distribution curve is respectively as shown in Fig. 7 a, 7b.As seen from the figure, two kinds of sides
The particle size distribution that method is pulverized is similar to cumulative particle size distribution, and maximum particle size is approximately less than 100 μm, flat
All granularities are close, all reach 20 μm.Above-mentioned curve chart illustrates, waterpower is revolved to utilize nappe flip length to add
Stream device classification, can reach the crushing effect suitable with ball milling.
2, Datong District's raw coal (the second experiment condition)
Fig. 8 a, 8b sets forth Datong coal ball milling after 1.16 hours coal sample size distribution with water jet powder
Broken and under 0.2MPa pressure coal sample size distribution curve after hydraulic classiciation.Obtain with two kinds of disintegrating process
Particle mean size be 11.9 μm, either particle size distribution, or cumulative particle size distribution, both of which is substantially
Identical；Size distribution curve shows, most of distribution of particles are about 20 μm, through nappe flip length
And after grading technology, granularity has reached 83% less than the coal dust of 25 μm, and after ball-milling technology is pulverized
Be then 80%.This explanation nappe flip length classifier artistic skill reach higher ultra-thin slurries of preparing
Requirement.
3, Datong District's raw coal (the 3rd experiment condition)
Fig. 9 a, 9b sets forth Datong coal ball milling after 2 hours coal sample size distribution with nappe flip length also
Coal sample size distribution curve after hydraulic classiciation under 0.3MPa pressure.With putting down that two kinds of disintegrating process obtain
All granularities are 11.9 μm, either particle size distribution, or cumulative particle size distribution, the most roughly the same: grain
Degree distribution shows, most granules are about 20 μm；Accumulation granularity shows, reaches less than the powder body of 50 μm
To 99%.These two kinds of techniques of explanation all can reach to prepare the requirement of ultra-thin slurries.Further, suitably carry
The feed pressure of high hydraulic classiciation, can obtain granularity thinner, the ultra-thin slurries being more evenly distributed.This
Illustrate to utilize high pressurewater cleaning hydroclone classification technique can meet preparation water-coal-slurry with fine
The requirement of water-coal-slurry slurring raw material.
4, Zhao Ge village raw coal (the first experiment condition)
Figure 10 a, 10b sets forth coal sample size distribution and water jet after Zhao Ge village coal briquette grinds 40 minutes
Pulverize and coal sample size distribution curve after hydraulic classiciation under 0.1MPa pressure.As seen from the figure, two kinds of powder
The coal dust that broken technique obtains still has similar granularity and cumulative particle size distribution.Can by integral distribution curve
Knowing, granularity has i.e. reached 99% less than 100 μm powder body；Granularity has reached 60% less than 300 μm powder body；
Granularity has reached 40% less than 10 μm powder body.From size distribution curve, most of particle size distribution exist
About 15 μm；The particle mean size that two kinds of disintegrating process obtain is 10.1 μm.Illustrate, the coal of Zhao Gezhuan
Mud is easier to pulverize, and two kinds of disintegrating process have all reached good crushing effect.
5, Zhao Ge village raw coal (the second experiment condition)
Figure 11 a, 11b sets forth coal sample size distribution and water jet after Zhao Ge village coal briquette grinds 50 minutes
Pulverize and coal sample size distribution curve after hydraulic classiciation under 0.15MPa pressure.As seen from the figure, two kinds of powder
The coal dust that broken technique obtains still has similar granularity and cumulative particle size distribution.Can by integral distribution curve
Knowing, granularity has i.e. reached 100% less than 100 μm powder body；Granularity has reached 93.8% less than 50 μm powder body；
Granularity has reached 35.0% less than 10 μm powder body；The particle mean size that two kinds of disintegrating process obtain is 9.8
μm。
6, Zhao Ge village raw coal (the 3rd experiment condition)
Figure 12 a, 12b sets forth coal sample size distribution and water jet after Zhao Ge village coal briquette grinds 60 minutes
Pulverize and coal sample size distribution curve after hydraulic classiciation under 0.2MPa pressure.As seen from the figure, two kinds of powder
The coal dust that broken technique obtains has similar granularity and cumulative particle size distribution.From integral distribution curve,
Granularity has i.e. reached 98% less than 50 μm powder body；Granularity has reached 80.0% less than 25 μm powder body；Grain
Degree has reached 39.0% less than 10 μm powder body；The peak value of size distribution curve is in 10.0 μm；Two kinds of pulverizing
The particle mean size that technique obtains is 9.5 μm.
7, Fan Ge village raw coal
Figure 13 a, 13b sets forth coal sample size distribution and water jet powder after Fan Ge village coal briquette grinds 3 hours
Broken and under 0.2MPa pressure coal sample size distribution curve after hydraulic classiciation.Size distribution curve is visible,
Nappe flip length hydraulic classiciation technique are used for pulverizing Fan Ge village coal and have more advantage, and granularity is less than 30 μm
Powder body has i.e. reached 99.0%；Granularity has reached 86.0% less than 20.0 μm powder body；Granularity is less than 10 μm
Powder body has reached 70.0%；The peak value of size distribution curve is in 10.0 μm.The light ball milling 3 of comparison diagram 11b
Hour technique understand, nappe flip length hydraulic classiciation technique have much higher under conditions of described
Crush efficiency.This explanation, under suitable process conditions, nappe flip length adds waterpower grading technology can be with more
High efficiency system is for superfine powder.
Two, Grin-ding energ7 interpretation of result
In crushing process, energy consumption size directly affects the cost of preparation water-coal-slurry.Therefore, it is necessary to difference
Disintegrating process is prepared the water-coal-slurry energy input of same particle sizes and volume and is analyzed.Table 1 is given respectively
Use nappe flip length to add waterpower grading technology, and obtain identical grain with ball-milling technology processing same coal
When the ultra-fine pigment of degree distribution are starched, required Grin-ding energ7.Note, in the energy consumption that waterjet calculated is pulverized
Time, the energy consumption of hydroseparator has been included.From table, the biggest by the energy consumption of nappe flip length
Big less than the energy consumption using ball milling skill.
The energy consumption of table 1 nappe flip length hydraulic classiciation and ball mill pulverizing
Data according to table 1: what the specific energy consumption of nappe flip length coal was only ball mill pulverizing 1/6 arrives
1/10, utilize nappe flip length the pulping energy consumption of water-coal-slurry will be greatly reduced, cost-effective.Its reason exists
Compression failure, the grinding mode that repeatedly grinds in ball mill.Additionally in crushing process, coal particle is subject to
The position of pressure and pressure application point are all to be rotated by random drum to be provided, most input energy
Being wasted between ball with ball or unproductive between ball with grinding machine bucket wall contacts, both of which reduces brokenly
Total energy efficiency during broken.And high-pressure water jet energy input is the highest, the high-energy of water jet is intensive
On granule, and its failure mode is that brittle cleavage destroys, and the tensile strength of coal is far below its pressure resistance
Degree, therefore, the capacity usage ratio of nappe flip length is higher than Ordinary pulverization equipment.
General high-concentration coal-water slurry particle mean size is less than 60 μm, and middle concentration water-coal-slurry particle mean size is less than
300 μm, Coal Slurry particle mean size is less than 10 μm.At present, common coal water slurry process is prepared both at home and abroad
Mostly using pulverising apparatus, its advantage is stable performance, dependable performance, and shortcoming is that energy consumption is high, ton slurry energy
Consumption is 30 40kWh/t, and available energy dissipation is less than 5%, and due to its disintegrating process feature, uses further
Conservation measures is the most difficult.This Water In The Experiment jet is 28.5 42.4kWh/t less than 74 μm production capacity consumptions,
The particle mean size of coal sample is 30.87 μm, illustrates in the case of energy consumption level is roughly the same, high-pressure water shot
Stream disintegrating process can prepare the coal dust of less grade.This demonstrate water jet technique and reduce Grin-ding energ7
Aspect has the biggest potentiality to excavate.
Three, flotation effect analysis
Table 2 gives three groups of process conditions of the float test of totally 6 Datong coals and results.Wherein test
Numbers 1 and 2 is one group, and the particle mean size of nappe flip length (test 1) is 22.65 μm, ball mill pulverizing
The particle mean size of (test 2) is 20.86 μm；Floating agent used by two tests is roughly the same.By
Table is visible, and the clean coal yield of nappe flip length is higher than ball-milling technology, its ash will be significantly with sulphur content content
Less than ball-milling technology；Show as the low 0.3-1% of ash, the low 0.05%-0.14% of sulphur content.Another two groups of tests have
Similar result.In experiments it is found that, under equal conditions, ball milling Datong District coal sample flotation effect extreme difference,
Even if increasing in the case of pharmaceutical quantities, through Datong District's coal dust of nappe flip length on ash disposal desulfurized effect also
It is better than ball mill pulverizing.Its reason is, repeatedly grinds mechanism due to ball mill, the surface of granule
Under friction repeatedly, the character of original mineral joint plane has had bigger change, the not granule of composition
Surface nature convergent.Meanwhile, grinding repeatedly can polish the convex-concave of particle surface, thus decreases ratio
Surface area so that mineral grain diminishes with the touch opportunity of floating agent.These reasons, are to cause ball milling
Microfine coal prepared by machine is than the reason of the powder body difficulty choosing prepared with water jet.
Table 2 Datong coal flotation results
Note: ball milling coal sample under equal conditions flotation effect extreme difference, therefore increase its dosing.
Table 3 gives three groups of process conditions of the float test of totally 6 Ge Zhaoge village coals and results.Its pilot scale
Test 7 and 8,9 and 10,11 and 12 with at one group.From table, the result of each group test is repeated table
Conclusion in 6-6.I.e. the clean coal yield of nappe flip length is higher than ball-milling technology, its ash contains with sulphur content
Amount ball-milling technology to be significantly less than；It should be noted that the sec-octyl alcohol dosing of Zhao Ge village coal is much smaller than
Datong coal, its clean coal yield is mostly higher than Datong coal, and ash is suitable with sulphur content index.The Zhao Ge village is described
Coal flotation effect is preferable.
Table 3 Tangshan Zhao Gezhuan coal flotation result
Table 4 gives process conditions and the result of the float test of three Ge Fange village coals.Wherein the 1st examination
Testing as nappe flip length to particle mean size is 7.71 μm, and the 2nd test is that nappe flip length is to average particle
Degree is 54.77 μm；Both floating agent dosages are identical, and the slurry that particle mean size is little has obtained higher
Clean coal yield, lower ash and sulphur content.The coal dust that water jet cleavage is pulverized is described, with particle size reduction,
Specific surface increases, thus has obtained more preferable flotation results.3rd experiment is for use ball-milling technology comminuted coal
Particle mean size be 49.99 μm, three Experimental Flotation dosings are identical, then the productivity of nappe flip length
Being above ball-milling technology, meanwhile, ash and sulphur content are below ball-milling technology.
Table 4 Tangshan Fan Gezhuan coal flotation result
Coal dust after flotation after burning it has been observed that by the Datong coal cleaned coal of high pressurewater cleaning and
Tail coal presents canescence, and the Datong coal cleaned coal of ball mill pulverizing and tail coal present bronzing.The fact that explanation
During with ball mill wet grinding coal, due to grinding of irony abrading-ball and grinding machine bucket wall, have a certain amount of
Ferrum entered in duff granule, coal dust body causes pollution.This phenomenon is owing to coal is at ball mill
In long-time the most repeatedly grind cause.
To sum up, its flotation effect direct flotation significantly better than coal slime after black water jet mill, it is former
Because of mainly by following some: (1) jet at a high speed has extremely strong penetration capacity, can pass through coal slime
A large amount of cracks and hole in granule penetrate into the natural crystal lattice interface of different component in coal；(2) hit at a high speed
During target, huge impulsive force and due under the effect of the many factors such as the stress wave that causes of impact,
Coal slime grain breakage becomes the less granule differed in size, and the impurity in coal is as pyrite, silicate etc. all
It is to amass granularity with richness fully to dissociate out and duff granule mixes from coal body；(3) these sizes
Its natural surface configuration of granule not waited has obtained intact preserving, and particle surface does not change
Property, its natural flotation nature-hydrophilic, hydrophobicity do not change, and this makes black water jet mill
Rear flotation ash disposal, sulfur limitation effect are better than the most size-reduced and coal slime of direct flotation.
Further, since coal water oxygen than air violent much, the soak time of the coal floatability to coal
Have a significant impact.High pressurewater cleaning coal completed in moment, pulverizes and carries out at low temperatures, uses this
The bright system being used for preparing water-coal-slurry carries out wet production, can preferably protect shape and the surface of particle,
Avoid the destructions such as the oxidation that grinds.Ball mill then needs a few hours, due to for a long time
Grind and the long-time immersion of water, make coal particle experienced by the process that temperature increases, be further exacerbated by coal
The oxidation of particle surface, reduces the hydrophobicity of coal particle surface, makes the coal after ball milling be more difficult to flotation.
The present invention for preparing in the system of water-coal-slurry, feed coal first passes through nappe flip length system and pulverizes,
Screen out thinner granule by hierarchy system again, then it is carried out flotation, isolate and meet granularity requirements
Coal particle concentrate.With existing employing ball grinding method coal carried out compared with the technique of superfine grinding, this
The energy consumption of the bright system for preparing water-coal-slurry is substantially reduced, and clean coal yield is high, and is obtained in that more preferably
Ash disposal desulfurized effect.
Although exemplary embodiment describing the present invention with reference to several, it is to be understood that, term used is
Illustrate and exemplary and nonrestrictive term.Owing to the present invention can be embodied as in a variety of forms
Without departing from invention spirit or essence, it should therefore be appreciated that above-described embodiment be not limited to any aforesaid carefully
Joint, and should explain widely in the spirit and scope that appended claims are limited, therefore fall into right
Whole changes and remodeling in requirement or its equivalent scope all should be appended claims and contained.
Claims (10)
1. for preparing a system for water-coal-slurry, including:
Nappe flip length system, including:
Water pump system, is used for forming water under high pressure；
Charging system, is used for providing feed coal；And
Water jet mill, it includes mixing chamber, collimator tube and pulverizing chamber, from the height of water pump system
Setting-out enters after being converted into high-speed jet and mixing in mixing chamber with the feed coal from charging system
Collimator tube, and accelerate in collimator tube, then collide with the target in pulverizing chamber and feed coal is pulverized
Form water coal mixtures；
Hierarchy system, it connects with the discharging opening of pulverizing chamber, to receive the water coal from water jet mill
Mixture, and to its centrifugal treating, make the gradation in water coal mixtures, formation coarse granule and thin
Grain, coarse granule is in the underflow opening of hierarchy system, and the fine particle that mix with water formation fine coal slurry is in point
The overfall of level system；And
Floatation system, it receives fine coal slurry, and by coal particle stronger for hydrophobicity in fine coal slurry and hydrophilic
Stronger coal particle separates.
2. the system for preparing water-coal-slurry as claimed in claim 1, wherein, charging system includes adding
Hopper and conveying pipe, charging box has air inlet and charge door, and air inlet is opened in the side face of charging box,
Charge door is opened in the bottom of charging box, and connects with conveying pipe.
3. the system for preparing water-coal-slurry as claimed in claim 3, wherein, charging box is infundibulate,
The side face of charging box is uniformly provided with multiple air inlet, and each air inlet is connected with Pneumatic conveying pipeline.
4. the system for preparing water-coal-slurry as claimed in claim 2, wherein, water jet mill is also
Including first jet；Mixing chamber has vibration chamber, the first opening, the second opening and a second nozzle, and first
Opening is opened in the side in vibration chamber, and connects with one end of first jet, and the second opening is opened in vibration
The top in chamber, and connect with charge door, second nozzle is opened in the opposite side in vibration chamber, and and collimator tube
Connect；High-speed jet enters vibration chamber via the other end of first jet and the first opening, and from charging
After the feed coal of system mixes in mixing chamber, warp is entered collimator tube by second nozzle.
5. the system for preparing water-coal-slurry as claimed in claim 4, wherein, first jet is funnel
Shape, the internal diameter of its other end opening is more than the internal diameter of one end open.
6. the system for preparing water-coal-slurry as claimed in claim 5, wherein, second nozzle part is stretched
Enter the intracavity that vibrates, a sidewall in neighbouring vibration chamber, the end of second nozzle, the end of second nozzle with should
The impact walls of inclination is formed between sidewall.
7. the system for preparing water-coal-slurry as claimed in claim 6, wherein, the internal diameter of interior end opening
Internal diameter equal to the first opening the internal diameter less than second nozzle, the internal diameter of second nozzle is less than vibration chamber
Highly.
8. the system for preparing water-coal-slurry as claimed in claim 1, wherein, also includes blood circulation,
It connects with the underflow opening of hierarchy system, through circulation force (forcing) pump, coarse granule is transmitted water jet mill, its
In, hierarchy system includes that force (forcing) pump and hydrocyclone, water coal mixtures are pressed in hydrocyclone
Classification after centrifugal rotation.
9. the system for preparing water-coal-slurry as claimed in claim 8, wherein, the life of hydrocyclone
Square being directly proportional of production capacity power and its diameter, partition size is directly proportional to 1/2 power of its diameter, waterpower
The cone angle of cyclone is about 20 degree, and overflow diameter is 0.2 0.3 times of hydrocyclone diameter.
10. the system for preparing water-coal-slurry as claimed in claim 1, wherein, floatation system includes
Flotation device, fine coal slurry stirs in flotation device and carries out flotation, adds collecting agent and foaming agent in flotation device,
In floatation process, the fine coal slurry of turbulent motion makes air pulverize as bubble, bubble and the coal in fine coal slurry
Grain collides or contacts, and the coal particle that hydrophobicity is strong is attached to bubble surface liter floating to fine coal slurry liquid level,
Scrape and be collected into water-coal-slurry；The coal particle that hydrophilic is strong remains in fine coal slurry, becomes mine tailing.
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| CN110329784A (en) * | 2019-08-01 | 2019-10-15 | 清华大学 | Conveying device and process equipment |
| CN110642016A (en) * | 2019-09-20 | 2020-01-03 | 中煤科工集团武汉设计研究院有限公司 | Coarse particle coal slurry pipeline feeding system and feeding method thereof |
| CN114935573A (en) * | 2022-04-26 | 2022-08-23 | 江苏仕能工业技术有限公司 | Rapid monitoring device of coal ash analyzer and use method thereof |
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