CN117299375B - Device and method for sorting coal gasification fine slag by ultrasonic cavitation and oil agglomeration - Google Patents
Device and method for sorting coal gasification fine slag by ultrasonic cavitation and oil agglomeration Download PDFInfo
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- CN117299375B CN117299375B CN202311380768.1A CN202311380768A CN117299375B CN 117299375 B CN117299375 B CN 117299375B CN 202311380768 A CN202311380768 A CN 202311380768A CN 117299375 B CN117299375 B CN 117299375B
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- 239000002893 slag Substances 0.000 title claims abstract description 111
- 239000003245 coal Substances 0.000 title claims abstract description 87
- 238000002309 gasification Methods 0.000 title claims abstract description 86
- 230000002776 aggregation Effects 0.000 title claims abstract description 42
- 238000005054 agglomeration Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 33
- 239000003921 oil Substances 0.000 claims abstract description 77
- 235000019198 oils Nutrition 0.000 claims abstract description 77
- 239000002002 slurry Substances 0.000 claims abstract description 45
- 238000003756 stirring Methods 0.000 claims abstract description 43
- 239000002245 particle Substances 0.000 claims abstract description 41
- 238000000926 separation method Methods 0.000 claims abstract description 39
- 235000015112 vegetable and seed oil Nutrition 0.000 claims abstract description 30
- 239000008158 vegetable oil Substances 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 77
- 238000009210 therapy by ultrasound Methods 0.000 claims description 17
- 239000002270 dispersing agent Substances 0.000 claims description 10
- 239000003995 emulsifying agent Substances 0.000 claims description 10
- 230000005484 gravity Effects 0.000 claims description 9
- 238000004220 aggregation Methods 0.000 claims description 7
- 238000009736 wetting Methods 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 229910052720 vanadium Inorganic materials 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 41
- 229910052799 carbon Inorganic materials 0.000 abstract description 39
- 230000000694 effects Effects 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 9
- 239000003034 coal gas Substances 0.000 description 6
- 239000012141 concentrate Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000010494 dissociation reaction Methods 0.000 description 3
- 230000005593 dissociations Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000005188 flotation Methods 0.000 description 2
- 229910052451 lead zirconate titanate Inorganic materials 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920004890 Triton X-100 Polymers 0.000 description 1
- 239000013504 Triton X-100 Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000011365 complex material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000010797 grey water Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 description 1
- 235000019982 sodium hexametaphosphate Nutrition 0.000 description 1
- 238000009270 solid waste treatment Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D3/00—Differential sedimentation
- B03D3/02—Coagulation
- B03D3/04—Coagulation assisted by vibrations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
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- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a device and a method for separating coal gasification fine slag by ultrasonic cavitation and oil agglomeration, wherein the device comprises a shell, a cylindrical screen, a stirring part, a vibration plate, an ultrasonic transducer and an ultrasonic generator, wherein the ultrasonic transducer is connected with the ultrasonic generator; the method comprises the following steps: 1. preparing coal gasification fine slag slurry and emulsified vegetable oil; 2. and conveying and sorting the gasified fine slag slurry. The invention integrates and couples ultrasonic cavitation, oil agglomeration and separation and particle size separation, fully dissociates carbon and ash components, improves separation precision and efficiency, and reduces separation cost.
Description
Technical Field
The invention belongs to the field of solid waste treatment, and particularly relates to a device and a method for separating coal gasification fine slag by ultrasonic cavitation and oil agglomeration.
Background
A large amount of gas slag is generated in the coal gasification process, and the treatment method of the gas slag is mainly accumulation and landfill. Because the gas slag contains a large amount of carbon residue and heavy metals such As Pb, be, as, se and the like, the gas slag occupies land resources and is easy to produce secondary pollution. Therefore, searching for a large-scale utilization channel of the coal gasification slag becomes a key for sustainable development of coal chemical industry. According to the structural characteristics of the gas slag, the analysis of the potential utilization value of the gas slag is mainly concentrated on two aspects: the porous carbon residue formed by the high-temperature chilling process is hopeful to be prepared into a carbon-based functional material. And secondly, the composite oxide after high-temperature activation is expected to be used in the field of building materials. However, the carbon and ash components in the gas slag are not single components, often are complex materials which are mutually enwrapped and mixed, and finally cannot meet the application requirements. Therefore, the separation of coal gas slag carbon and ash is the precondition of the resource utilization.
In the prior art, the methods related to coal gas slag-melting carbon and ash separation mainly comprise a flotation method and a gravity separation method. The flotation method strengthens the surface property of the coal gas slag particles by adding the medicament, and finally realizes the separation and enrichment of carbon and ash particles, but the problem of large medicament consumption is often encountered due to the developed pore structure of the coal gas slag. The gravity separation method is to realize the separation of carbon and ash in a gravity field by utilizing the density difference between particles. However, the coal gas slag has wide particle size distribution range, and the dominant particle size is concentrated below 0.1mm, so that the viscous resistance of a gravity field to particles is greatly weakened, and enough displacement difference is difficult to generate between carbon and ash. In addition, the existing separation method is mostly developed around mechanical crushing, and the method is difficult to completely dissociate carbon and ash components, but can further aggravate the fine fraction effect of the gas slag and increase the separation difficulty. Therefore, a device and a method for separating coal gasification fine slag by combining ultrasonic cavitation with oil agglomeration are needed nowadays, the ultrasonic cavitation, the oil agglomeration separation and the particle size separation are integrated and coupled, carbon and ash components in the coal gasification fine slag are fully separated through an ultrasonic cavitation effect, the carbon components are enriched by vegetable oil according to the hydrophilic-hydrophobic difference of the carbon and ash components, and then the carbon and ash components are separated through a cylinder screen, so that the separation precision and efficiency are improved, and the separation cost is reduced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the device for separating coal gasification fine slag by ultrasonic cavitation and oil agglomeration, which is reasonable in design, integrates ultrasonic cavitation, oil agglomeration separation and particle size separation, fully separates carbon and ash components in coal gasification fine slag through ultrasonic cavitation effect, enriches the carbon components by vegetable oil according to the hydrophilic-hydrophobic difference of the carbon and ash components, separates the carbon and ash components through a cylinder screen, improves separation precision and efficiency, and reduces separation cost.
In order to solve the technical problems, the invention adopts the following technical scheme: an ultrasonic cavitation cooperated oil agglomeration and separation coal gasification fine slag device is characterized in that: the device comprises a shell, a cylindrical screen arranged in the shell, a stirring component arranged on the shell and extending into the cylindrical screen, a vibrating plate arranged at the lower part in the shell, a plurality of ultrasonic transducers arranged at the bottom of the vibrating plate and an ultrasonic generator arranged in the bottom of the shell; a plurality of ultrasonic transducers are connected with an ultrasonic generator;
the cylindrical screen divides the interior of the shell into an inner cavity and an outer cavity, and the top of the shell is provided with an ore pulp inlet pipe and an oil delivery pipe extending to the inner cavity;
the stirring component comprises a motor arranged at the top of the shell, a stirring paddle which is in transmission connection with an output shaft of the motor and penetrates through the top of the shell to extend into the inner cavity, and stirring blades arranged at the bottom of the stirring paddle;
the upper part of one side surface of the shell is provided with a water inlet pipe communicated with the outer cavity, the opposite side surface of the shell is provided with a bottom flow pipe communicated with the outer cavity and an overflow pipe communicated with the inner cavity, and the installation heights of the water inlet pipe, the overflow pipe and the bottom flow pipe are gradually reduced;
and a discharge valve is arranged on the bottom flow pipe.
The device for separating coal gasification fine slag by ultrasonic cavitation and oil agglomeration is characterized in that: the top of casing is all stretched out at pulp entry pipe and oil delivery pipe, the bottom of pulp entry pipe and the top internal phase of casing are leveled, the bottom of oil delivery pipe stretches into the inner chamber, the bottom of oil delivery pipe is provided with umbrella-shaped shower nozzle, the bottom of oil delivery pipe is less than the bottom of stirring leaf.
The device for separating coal gasification fine slag by ultrasonic cavitation and oil agglomeration is characterized in that: the top of the cylindrical drum screen is connected with the inside of the top of the shell, the top of the cylindrical drum screen is provided with an opening, and the inner end of the overflow pipe penetrates through the side wall of the cylindrical drum screen and is flush with the side wall of the cylindrical drum screen;
and a gap is arranged between the bottom of the cylindrical drum screen and the vibration plate, and the underflow pipe is positioned between the bottom of the cylindrical drum screen and the vibration plate.
The device for separating coal gasification fine slag by ultrasonic cavitation and oil agglomeration is characterized in that: an overflow groove is formed in the upper portion of the outer side face of the shell, the top of the overflow groove is higher than the top of the shell, and a discharge hole is formed in the overflow groove;
the top of casing is provided with the guard box of power supply machine installation.
The device for separating coal gasification fine slag by ultrasonic cavitation and oil agglomeration is characterized in that: the top of the ore pulp inlet pipe is provided with a hopper, and the aperture of the cylindrical drum screen is 13 mu m, 22 mu m or 37 mu m.
Meanwhile, the invention also discloses a method for separating coal gasification fine slag by ultrasonic cavitation cooperated with oil agglomeration, which has the advantages of simple steps, reasonable design and good use effect, and is characterized by comprising the following steps:
step one, preparing coal gasification fine slag slurry and emulsified vegetable oil:
step 101, adding coal gasification fine slag to be separated into a preparation box, and stirring the coal gasification fine slag to be separated while adding water for wetting to finish wetting of the coal gasification fine slag to be separated; wherein the mass of the added water is 4-7 times of the mass of the coal gasification fine slag to be separated;
102, adding a dispersing agent and water to prepare coal gasification fine slag slurry;
step 103, mixing the vegetable oil and an oil emulsifier to obtain emulsified vegetable oil;
step two, conveying and sorting coal gasification fine slag slurry:
step 201, closing a water inlet pipe and an underflow pipe, conveying coal gasification fine slag slurry to the top of an ore pulp inlet pipe, and entering a shell through the ore pulp inlet pipe until the volume of the coal gasification fine slag slurry is 50-80% V; wherein V represents the total volume of a cavity enclosed between the inner surface of the shell and the top surface of the vibration plate, and the height of coal gasification fine slag slurry is lower than that of the overflow pipe;
step 202, setting output power and ultrasonic treatment preset time through an ultrasonic generator, driving a plurality of ultrasonic transducers to drive a vibration plate to vibrate by the ultrasonic generator, and carrying out ultrasonic treatment on coal gasification fine slag slurry in a shell until the preset ultrasonic treatment time is reached, so that particles with particle diameters smaller than the aperture of a cylindrical drum screen come into an outer cavity under the action of gravity and water flow, and the particles with particle diameters not smaller than the aperture of the cylindrical drum screen are isolated in the inner cavity;
step 203, operating a motor, wherein the motor drives a stirring blade to rotate through a stirring paddle, and meanwhile, adding emulsified vegetable oil into the lower part of an inner cavity through an oil delivery pipe;
204, treating coal gasification fine slag slurry for 5-10 min by ultrasonic combined stirring, and then turning off a motor and an ultrasonic generator to wait for an oil-water bilayer to appear in the shell; wherein the middle upper layer of the oil-water bilayer is an oil aggregation layer;
step 205, opening a water inlet pipe, enabling the liquid level in the shell to rise through water inlet in the shell through the water inlet pipe, fully collecting the oil aggregation layer through an overflow pipe until water flows out of the overflow pipe, and stopping water inlet of the water inlet pipe;
then, the discharge valve is opened to feed water into the shell through the water inlet pipe, ash water is collected through the underflow pipe until the clear water flows out of the underflow pipe, and the water inlet pipe and the discharge valve are closed after the ash water is collected.
The method is characterized in that: in the step 102, the mass ratio of coal gasification fine slag, water and dispersing agent in the coal gasification fine slag slurry is 10: the method comprises the steps of carrying out a first treatment on the surface of the
In the step 103, the mass ratio of the vegetable oil to the oil emulsifier is 1: .
The method is characterized in that: in step 202, the output power is set to 40% -100% of rated power through an ultrasonic generator, and the preset time of ultrasonic treatment is 30-200 minutes;
the rotating speed of the motor in the step 203 is 1000 r/min-1400 r/min; the addition volume of the vegetable oil is 2% -7% of the volume of the gasified fine slag slurry in the shell.
Compared with the prior art, the invention has the following advantages:
1. the invention sets up the ultrasonic generator and drives a plurality of stated ultrasonic transducer and shake the board to shake, shake the board to shake and shake the board to shake and act on the slurry of coal gasification fine slag, in order to rely on cavitation that the ultrasonic wave produces, make the ash content mingled with in the coal gasification fine slag drop, realize the dissociation of the charcoal ash, the ash content after dissociation comes to the external chamber through the cylinder screen.
2. The cylindrical drum screen is arranged, so that carbon particles with the particle size larger than the aperture of the cylindrical drum screen are isolated in the inner cavity, ash with the particle size smaller than the aperture of the cylindrical drum screen passes through the cylindrical drum screen to reach the outer cavity under the action of gravity and water flow, and ash inclusion in the agglomeration process of the carbon particles can be prevented; in addition, can also prevent that the oil reunion layer from being stained with on the casing inside wall at the stirring in-process, the oil reunion layer of being convenient for is collected through the overflow pipe, reduces concentrate loss, improves separation efficiency.
3. According to the invention, the motor is arranged to work, the stirring blade is driven to rotate by the stirring paddle, vegetable oil is added to the lower part of the inner cavity through the oil delivery pipe, then the gasified fine slag slurry is treated by ultrasonic combined stirring, the cooperative separation of the ultrasonic cavitation effect and the oil agglomeration separation technology is realized, the micro bubbles generated by ultrasonic cavitation are utilized to dissociate carbon and ash components to form a composite structure, and meanwhile, the crushing effect is generated on oil drops, so that the surface tension of oil-water two phases is reduced, the oil drops and carbon particles are fully contacted and agglomerated, and the separation precision and efficiency are improved.
4. According to the invention, the oil aggregation layer is fully collected through the overflow pipe, the concentrate extraction with the fixed carbon content of 50% -80% is realized, the ash water is collected through the underflow pipe, the tailings with the loss on ignition of 3% -8% are extracted, the indexes of recycling the carbon and ash components are met, and the purpose of efficiently separating coal gasification fine slag is achieved.
5. The method is suitable for coal gasification fine slag with fixed carbon content of 10% -60% and particle size of less than 0.5mm, and the coal gasification fine slag with larger particle size needs to be removed in advance to avoid damaging the device.
6. The method for separating the coal gasification fine slag by combining ultrasonic cavitation and oil agglomeration has the advantages of simple steps, convenient realization and simple and convenient operation, and ensures the efficient separation of carbon and ash in the coal gasification fine slag.
7. The method for sorting coal gasification fine slag by ultrasonic cavitation and oil agglomeration has the advantages of simple operation and good use effect, firstly, the preparation of coal gasification fine slag slurry and emulsified vegetable oil, secondly, the conveying and sorting of the coal gasification fine slag slurry are carried out, the ultrasonic cavitation technology, the oil agglomeration and sorting technology and the particle size sorting technology are coupled, and the three technologies are matched in a coordinated manner to form a unified whole, and carbon and ash products meeting the utilization conditions are sorted.
In conclusion, the invention has reasonable design, integrates and couples ultrasonic cavitation, oil agglomeration and separation and particle size separation, fully separates carbon and ash components in coal gasification fine slag through ultrasonic cavitation effect, enriches the carbon components by vegetable oil according to the difference of hydrophilicity and hydrophobicity of the carbon and ash components, separates the carbon and ash components through a cylinder screen, improves separation precision and efficiency, and reduces separation cost.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
FIG. 1 is a schematic structural view of an ultrasonic cavitation cooperated with oil agglomeration coal gasification fine slag separation device.
FIG. 2 is a flow chart of the method for separating coal gasification fine slag by ultrasonic cavitation and oil agglomeration.
Reference numerals illustrate:
1-a pulp inlet pipe; 2-a motor; 2-1, stirring paddles;
2-stirring blade; 3-an overflow trough; 4-overflow pipe;
5-a cylindrical screen; 6, a shell; 7-a bottom flow pipe;
7-1-a discharge valve; 8-an ultrasonic transducer; 9-an outer cavity;
10-an ultrasonic generator; 11-inner cavity; 12-umbrella-shaped spray heads;
13-a water inlet pipe; 14-an oil delivery pipe; 15-a power line;
16-vibration plate; 17-a protection box.
Detailed Description
The device for separating coal gasification fine slag by ultrasonic cavitation and oil agglomeration comprises a shell 6, a cylindrical drum screen 5 arranged in the shell 6, a stirring component arranged on the shell 6 and extending into the cylindrical drum screen 5, a vibration plate 16 arranged at the inner lower part of the shell 6, a plurality of ultrasonic transducers 8 arranged at the bottom of the vibration plate 16 and an ultrasonic generator 10 arranged in the bottom of the shell 6, wherein the stirring component is arranged on the shell 6; a plurality of ultrasonic transducers 8 are connected with an ultrasonic generator 10;
the cylindrical drum screen 5 divides the interior of the shell 6 into an inner cavity 11 and an outer cavity 9, and the top of the shell 6 is provided with a pulp inlet pipe 1 and an oil delivery pipe 14 extending to the inner cavity 11;
the stirring component comprises a motor 2 arranged at the top of a shell 6, a stirring paddle 2-1 which is in transmission connection with an output shaft of the motor 2 and penetrates through the top of the shell 6 to extend into an inner cavity 11, and a stirring blade 2-2 arranged at the bottom of the stirring paddle 2-1;
a water inlet pipe 13 communicated with the outer cavity 9 is arranged at the upper part of one side surface of the shell 6, an underflow pipe 7 communicated with the outer cavity 9 and an overflow pipe 4 communicated with the inner cavity 11 are arranged on the opposite side surface of the shell 6, and the installation heights of the water inlet pipe 13, the overflow pipe 4 and the underflow pipe 7 are gradually reduced;
the underflow pipe 7 is provided with a discharge valve 7-1.
In this embodiment, the tops of the pulp inlet pipe 1 and the oil delivery pipe 14 extend out of the top of the casing 6, the bottom of the pulp inlet pipe 1 and the top of the casing 6 are flush, the bottom of the oil delivery pipe 14 extends into the inner cavity 11, an umbrella-shaped spray head 12 is arranged at the bottom of the oil delivery pipe 14, and the bottom of the oil delivery pipe 14 is lower than the bottom of the stirring blade 2-2.
In this embodiment, the top of the cylindrical drum screen 5 is connected with the top of the shell 6, the top of the cylindrical drum screen 5 is open, and the inner end of the overflow pipe 4 passes through the side wall of the cylindrical drum screen 5 and is flush with the side wall;
a gap is arranged between the bottom of the cylindrical drum screen 5 and the vibrating plate 16, and the underflow pipe 7 is positioned between the bottom of the cylindrical drum screen 5 and the vibrating plate 16.
In this embodiment, an overflow groove 3 is disposed at the upper part of the outer side surface of the housing 6, the top of the overflow groove 3 is higher than the top of the housing 6, and a discharge port is disposed on the overflow groove 3;
the top of the housing 6 is provided with a protective box 17 for mounting the motor 2.
In this embodiment, a hopper is disposed at the top of the ore pulp inlet pipe 1, and the aperture of the cylindrical drum screen 5 is 13 μm, 22 μm or 37 μm, and a suitable aperture can be selected according to the particle size characteristics of the gas slag.
In this embodiment, the overflow tank 3 is provided to avoid overflow collection during transportation of the coal gasification fine slag slurry.
In this embodiment, the housing 6 is a stainless steel plate having a thickness of 3 mm.
In this embodiment, the ultrasonic transducer 8 is a sandwich type vibration head composed of lead zirconate titanate PZT piezoelectric ceramic plates, the ultrasonic frequency is 40kHz, and the single power is 100w.
In this embodiment, the thickness of the vibration plate 16 is 2.5mm, and the size of the vibration plate is 600mm×600mm, and in order to ensure that the sound wave frequency and the sound energy density of each point on the vibration plate 16 are the same, the ultrasonic transducers 8 are uniformly arranged at the bottom of the vibration plate of 600mm×600 mm.
In this embodiment, the number of the ultrasonic transducers 8 is 9, and the ultrasonic transducers are distributed in three rows and three columns at equal intervals.
In this embodiment, the voltage of the ultrasonic generator 10 is 220v, the frequency is 40kHz, the rated power is 900w, 9 transducers with the frequency of 40kHz and the power of 100w can be driven, the power line 15 of the ultrasonic generator 10 passes through the shell 6 to be connected, the control panel of the ultrasonic generator 10 is exposed outside the shell 6, the adjustable output power can be adjusted, and the adjustment range is 40% -100% of the rated power.
In this embodiment, the outlet of the umbrella-shaped nozzle 12 is a plurality of small holes with a diameter of 1 mm.
In this embodiment, in actual use, the water inlet pipe 13 is provided with a water inlet valve, and the water inlet pipe 13 is opened and closed by the operation of the water inlet valve.
The method for separating coal gasification fine slag by ultrasonic cavitation and oil agglomeration comprises the following steps:
step one, preparing coal gasification fine slag slurry and emulsified vegetable oil:
step 101, adding coal gasification fine slag to be separated into a preparation box, and stirring the coal gasification fine slag to be separated while adding water for wetting to finish wetting of the coal gasification fine slag to be separated; wherein the mass of the added water is 4-7 times of the mass of the coal gasification fine slag to be separated;
102, adding a dispersing agent and water to prepare coal gasification fine slag slurry;
step 103, mixing the vegetable oil and an oil emulsifier to obtain emulsified vegetable oil;
step two, conveying and sorting coal gasification fine slag slurry:
step 201, closing a water inlet pipe 13 and an underflow pipe 7, conveying the gasified fine slag slurry to the top of the ore pulp inlet pipe 1, and entering the shell 6 through the ore pulp inlet pipe 1 until the volume of the gasified fine slag slurry is 50-80%V; wherein V represents the total volume of a cavity enclosed between the inner surface of the shell 6 and the top surface of the vibration plate 16, and the height of coal gasification fine slag slurry is lower than that of the overflow pipe 4;
step 202, setting output power and ultrasonic treatment preset time through an ultrasonic generator 10, driving a plurality of ultrasonic transducers 8 to drive a vibration plate 16 to vibrate by the ultrasonic generator 10, and carrying out ultrasonic treatment on coal gasification fine slag slurry in a shell 6 until the preset ultrasonic treatment time is reached, so that particles with particle size smaller than the aperture of a cylindrical screen 5 come into an outer cavity 9 under the action of gravity and water flow, and the particles with particle size not smaller than the aperture of the cylindrical screen 5 are isolated in an inner cavity 11;
step 203, operating a motor 2 to work, wherein the motor 2 drives a stirring blade 2-2 to rotate through a stirring paddle 2-1, and meanwhile, adding emulsified vegetable oil into the lower part of an inner cavity 11 through an oil delivery pipe 14;
204, treating coal gasification fine slag slurry for 5-10 min by ultrasonic combined stirring, and then turning off the motor 2 and the ultrasonic generator 10 until an oil-water double layer appears in the shell 6; wherein the middle upper layer of the oil-water bilayer is an oil aggregation layer;
step 205, opening the water inlet pipe 13, enabling the water in the shell 4 to be fed into the shell 4 through the water inlet pipe 13 to enable the liquid level in the shell 6 to rise, and fully collecting the oil aggregation layer through the overflow pipe 4 until water flows out of the overflow pipe 4, and stopping water feeding of the water inlet pipe 13;
then the discharge valve 7-1 is opened to feed water into the shell 4 through the water inlet pipe 13, the ash water is collected through the bottom flow pipe 7 until the bottom flow pipe 7 flows out of the clean water, and the water inlet pipe 13 and the discharge valve 7-1 are closed after the ash water is collected.
In the embodiment, the cylindrical screen 5 is arranged, so that the particles of the gas slag with the particle size smaller than the pore diameter of the cylindrical screen 5 come into the outer cavity 9 under the action of gravity and water flow, and the particles with the particle size larger than the pore diameter of the cylindrical screen 5 are isolated in the inner cavity 11; the main grain diameter of ash, namely tailings, is below 37 microns, and the grain diameter of carbon particles is definitely larger than the grain diameter after agglomeration, so that ash can be led to an outer cavity 9 through a cylinder screen 5, and ash inclusion of the carbon particles in the agglomeration process can be prevented;
in addition, can also prevent that the oil reunion layer from being stained with on the inside wall of casing 6 in the stirring in-process, the oil reunion layer of being convenient for is collected through overflow pipe 4, reduces concentrate loss, improves separation efficiency.
In this embodiment, the ultrasonic generator 10 drives the plurality of ultrasonic transducers 8 to drive the vibration plate 16 to vibrate, and the vibration plate 16 vibrates to act on the coal gasification fine slag slurry, so as to enable ash contained in the coal gasification fine slag to fall off by means of cavitation generated by ultrasonic waves, so as to realize dissociation of carbon ash, and the dissociated ash passes through the cylinder screen 5 to reach the outer cavity 9.
In the embodiment, when the method is specifically used, the waste vegetable oil can be used as a collector, so that the environment-friendly concept of treating waste with waste is adopted, and the sorting cost is reduced. Or may be replaced with other oils to perform the same function.
In the embodiment, when the ultrasonic treatment method is specifically used, the dispersing agent can be sodium hexametaphosphate dispersing agent, so that the crushing effect of ultrasonic treatment on the coal gas slag particles is improved.
In the embodiment, when the oil emulsifier is specifically used, the oil emulsifier adopts triton X-100, so that the oil drop size is further reduced, and the sorting effect is improved.
In this embodiment, in specific use, the following grey water is used as tailings by press filtration and drying, and the oil agglomeration layer is used as concentrate by washing, press filtration and evaporation for oil removal, which can be referred to the conventional mode in the art.
In the embodiment, when the method is specifically used, the fixed carbon content of the concentrate and the loss on ignition of the tailings can be controlled by adjusting the ultrasonic frequency, the output power, the ultrasonic treatment time, the rotation speed of the stirring motor and the particle size of the screen mesh.
In the embodiment, the invention couples the ultrasonic cavitation technology, the oil agglomeration separation technology and the particle size separation technology, coordinates and matches the three technologies to form a unified whole, and separates out carbon and ash products meeting the utilization conditions.
In this embodiment, in the step 102, the mass ratio of the coal gasification fine slag, water and dispersant in the coal gasification fine slag slurry is 10:80:0.1;
in the step 103, the mass ratio of the vegetable oil to the oil emulsifier is 1:4%;
in step 202, the output power is set to 40% of rated power by the ultrasonic generator 10, and the preset ultrasonic treatment time is 200 minutes;
in step 203, the rotating speed of the motor 2 is 1000r/min; the adding volume of the vegetable oil is 2% of the volume of the gasified fine slag slurry in the shell 6;
and (4) treating the coal gasification fine slag slurry for 5min by ultrasonic combined stirring in the step 204.
Example 3
In this example, unlike example 2, the mass ratio of coal gasification fine slag, water and dispersant in the coal gasification fine slag slurry in step 102 is 10:110:1, a step of;
in the step 103, the mass ratio of the vegetable oil to the oil emulsifier is 1:8%;
in step 202, the output power is set to be 100% of rated power by the ultrasonic generator 10, and the preset ultrasonic treatment time is 30 minutes;
in step 203, the rotating speed of the motor 2 is 1400r/min; the adding volume of the vegetable oil is 7% of the volume of the gasified fine slag slurry in the shell 6;
and treating the gasified fine slag slurry by ultrasonic combined stirring for 10min in step 204.
Example 4
In this example, unlike example 2, the mass ratio of coal gasification fine slag, water and dispersant in the coal gasification fine slag slurry in step 102 is 10:95:0.5;
in the step 103, the mass ratio of the vegetable oil to the oil emulsifier is 1:6%;
in step 202, the output power is set to 70% of rated power by the ultrasonic generator 10, and the preset ultrasonic treatment time is 110 minutes;
in step 203, the rotating speed of the motor 2 is 1200r/min; the adding volume of the vegetable oil is 5% of the volume of the gasified fine slag slurry in the shell 6;
and (4) treating the coal gasification fine slag slurry for 8min by ultrasonic combined stirring in the step 204.
In conclusion, the invention has reasonable design, integrates and couples ultrasonic cavitation, oil agglomeration and separation and particle size separation, fully separates carbon and ash components in coal gasification fine slag through ultrasonic cavitation effect, enriches the carbon components by vegetable oil according to the difference of hydrophilicity and hydrophobicity of the carbon and ash components, separates the carbon and ash components through a cylinder screen, improves separation precision and efficiency, and reduces separation cost.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any simple modification, variation and equivalent structural changes made to the above embodiment according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (8)
1. An ultrasonic cavitation cooperated oil agglomeration and separation coal gasification fine slag device is characterized in that: comprises a shell (6), a cylindrical screen (5) arranged in the shell (6), a stirring component arranged on the shell (6) and extending into the cylindrical screen (5), a vibrating plate (16) arranged at the lower part in the shell (6), a plurality of ultrasonic transducers (8) arranged at the bottom of the vibrating plate (16) and an ultrasonic generator (10) arranged in the bottom of the shell (6); a plurality of ultrasonic transducers (8) are connected with an ultrasonic generator (10);
the cylindrical drum screen (5) divides the interior of the shell (6) into an inner cavity (11) and an outer cavity (9), and the top of the shell (6) is provided with an ore pulp inlet pipe (1) and an oil delivery pipe (14) extending to the inner cavity (11);
the stirring component comprises a motor (2) arranged at the top of the shell (6), a stirring paddle (2-1) which is in transmission connection with an output shaft of the motor (2) and penetrates through the top of the shell (6) to extend into the inner cavity (11), and stirring blades (2-2) arranged at the bottom of the stirring paddle (2-1);
a water inlet pipe (13) communicated with the outer cavity (9) is arranged at the upper part of one side surface of the shell (6), an underflow pipe (7) communicated with the outer cavity (9) and an overflow pipe (4) communicated with the inner cavity (11) are arranged on the opposite side surface of the shell (6), and the installation heights of the water inlet pipe (13), the overflow pipe (4) and the underflow pipe (7) are gradually reduced;
the underflow pipe (7) is provided with a discharge valve (7-1).
2. The device for sorting coal gasification fine slag by ultrasonic cavitation and oil agglomeration according to claim 1, wherein the device is characterized in that: the top of ore pulp entry pipe (1) and defeated oil pipe (14) all stretch out the top of casing (6), the bottom of ore pulp entry pipe (1) and the top internal phase of casing (6) flush, the bottom of defeated oil pipe (14) stretches into inner chamber (11), the bottom of defeated oil pipe (14) is provided with umbelliform shower nozzle (12), the bottom of defeated oil pipe (14) is less than the bottom of stirring leaf (2-2).
3. The device for sorting coal gasification fine slag by ultrasonic cavitation and oil agglomeration according to claim 1, wherein the device is characterized in that: the top of the cylindrical drum screen (5) is connected with the inside of the top of the shell (6), the top of the cylindrical drum screen (5) is provided with an opening, and the inner end of the overflow pipe (4) penetrates through the side wall of the cylindrical drum screen (5) and is flush with the side wall;
a gap is arranged between the bottom of the cylindrical drum screen (5) and the vibrating plate (16), and the underflow pipe (7) is positioned between the bottom of the cylindrical drum screen (5) and the vibrating plate (16).
4. The device for sorting coal gasification fine slag by ultrasonic cavitation and oil agglomeration according to claim 1, wherein the device is characterized in that: an overflow groove (3) is formed in the upper portion of the outer side face of the shell (6), the top of the overflow groove (3) is higher than the top of the shell (6), and a discharge hole is formed in the overflow groove (3);
the top of the shell (6) is provided with a protection box (17) for installing the motor (2).
5. The device for sorting coal gasification fine slag by ultrasonic cavitation and oil agglomeration according to claim 1, wherein the device is characterized in that: the top of the ore pulp inlet pipe (1) is provided with a hopper, and the aperture of the cylindrical drum screen (5) is 13 mu m, 22 mu m or 37 mu m.
6. A method of classifying coal gasification fines using the apparatus of claim 1, the method comprising the steps of:
step one, preparing coal gasification fine slag slurry and emulsified vegetable oil:
step 101, adding coal gasification fine slag to be separated into a preparation box, and stirring the coal gasification fine slag to be separated while adding water for wetting to finish wetting of the coal gasification fine slag to be separated; wherein the mass of the added water is 4-7 times of the mass of the coal gasification fine slag to be separated;
102, adding a dispersing agent and water to prepare coal gasification fine slag slurry;
step 103, mixing the vegetable oil and an oil emulsifier to obtain emulsified vegetable oil;
step two, conveying and sorting coal gasification fine slag slurry:
step 201, closing a water inlet pipe (13) and an underflow pipe (7), conveying the gasified fine slag slurry to the top of an ore pulp inlet pipe (1), and entering a shell (6) through the ore pulp inlet pipe (1) until the volume of the gasified fine slag slurry is 50-80%V; wherein V represents the total volume of a cavity enclosed between the inner surface of the shell (6) and the top surface of the vibration plate (16), and the height of coal gasification fine slag slurry is lower than that of the overflow pipe (4);
step 202, setting output power and ultrasonic treatment preset time through an ultrasonic generator (10), driving a plurality of ultrasonic transducers (8) to drive a vibration plate (16) to vibrate by the ultrasonic generator (10), and carrying out ultrasonic treatment on coal gasification fine slag slurry in a shell (6) until the preset ultrasonic treatment time is reached, so that particles with the particle size smaller than the pore diameter of a cylindrical drum screen (5) come into an outer cavity (9) under the action of gravity and water flow, and the particles with the particle size not smaller than the pore diameter of the cylindrical drum screen (5) are isolated in an inner cavity (11);
step 203, operating a motor (2) to work, wherein the motor (2) works to drive a stirring blade (2-2) to rotate through a stirring paddle (2-1), and meanwhile, adding emulsified vegetable oil into the lower part of an inner cavity (11) through an oil delivery pipe (14);
204, treating coal gasification fine slag slurry for 5-10 min by ultrasonic combined stirring, and then closing a motor (2) and an ultrasonic generator (10) until an oil-water bilayer appears in a shell (6); wherein the middle upper layer of the oil-water bilayer is an oil aggregation layer;
step 205, opening a water inlet pipe (13), feeding water into the shell (6) through the water inlet pipe (13) to enable the liquid level in the shell (6) to rise, and fully collecting an oil aggregation layer through the overflow pipe (4) until water flows out of the overflow pipe (4), and stopping water feeding of the water inlet pipe (13);
then, the discharge valve (7-1) is opened to feed water into the shell (6) through the water inlet pipe (13), and ash water is collected through the bottom flow pipe (7) until the bottom flow pipe (7) flows out of clear water, and the water inlet pipe (13) and the discharge valve (7-1) are closed after the ash water is collected.
7. The method of claim 6, wherein: in the step 102, the mass ratio of coal gasification fine slag, water and dispersing agent in the coal gasification fine slag slurry is 10 (80-110): (0.1 to 1);
in the step 103, the mass ratio of the vegetable oil to the oil emulsifier is 1: (4% -8%).
8. The method of claim 6, wherein: in step 202, the output power is set to be 40-100% of rated power through an ultrasonic generator (10), and the preset time of ultrasonic treatment is 30-200 minutes;
in the step 203, the rotating speed of the motor (2) is 1000 r/min-1400 r/min; the addition volume of the vegetable oil is 2-7% of the volume of the gasified fine slag slurry in the shell (6).
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| CN109731698A (en) * | 2019-03-15 | 2019-05-10 | 中国矿业大学 | A kind of easily floating fine slime column sorting unit of high ash and method |
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| CN115970873A (en) * | 2023-01-19 | 2023-04-18 | 中国神华煤制油化工有限公司 | Device and method for sorting carbon residue in gasified slag |
| CN219003093U (en) * | 2022-12-13 | 2023-05-12 | 陕西科技大学 | Reaction device for preparing coal gas slag-based zeolite adsorbent |
| CN116851408A (en) * | 2023-07-31 | 2023-10-10 | 碳达(深圳)新材料技术有限责任公司 | Gas slag treatment device and method |
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| CN109731698A (en) * | 2019-03-15 | 2019-05-10 | 中国矿业大学 | A kind of easily floating fine slime column sorting unit of high ash and method |
| CN115338039A (en) * | 2021-05-14 | 2022-11-15 | 中国科学院过程工程研究所 | Device system and method for separating coal gasification slag carbon ash |
| CN115608518A (en) * | 2022-10-19 | 2023-01-17 | 华东理工大学 | Carbon ash separation method for coal gasification fine slag |
| CN219003093U (en) * | 2022-12-13 | 2023-05-12 | 陕西科技大学 | Reaction device for preparing coal gas slag-based zeolite adsorbent |
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