CN102284375B - Pulverized fuel ash flotation separation equipment with physical separation device - Google Patents
Pulverized fuel ash flotation separation equipment with physical separation device Download PDFInfo
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- CN102284375B CN102284375B CN 201110156537 CN201110156537A CN102284375B CN 102284375 B CN102284375 B CN 102284375B CN 201110156537 CN201110156537 CN 201110156537 CN 201110156537 A CN201110156537 A CN 201110156537A CN 102284375 B CN102284375 B CN 102284375B
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Abstract
The invention discloses pulverized fuel ash flotation separation equipment with a physical separation device. The equipment comprises a vertically arranged cylinder body, an overflow collection section positioned on the top of the cylinder body, a tail ash collection section positioned at the bottom of the cylinder body, a gas disperse device positioned in the cylinder body, a physical separation device positioned on the wall or the gas disperse device of the cylinder body, multiple layers of flotation plates which are positioned in the cylinder body and alternately arranged, a distribution device positioned above the overflow collection section, as well as a gas supply device which is communicated with a plurality of pores on the gas disperse device through a first gas pipeline. The pulverized fuel ash flotation separation equipment has the advantages that: separation of carbon particles and dusts are improved by arranging the physical separation device, and carbon particles with ultrafine granularity are formed, so that the flotation efficiency of the carbon particles is improved.
Description
Technical field
The present invention relates to a kind of fuel ash flotation separation equipment that utilizes flyash to make active carbon, more particularly, the present invention relates to a kind of fuel ash flotation separation equipment with physical separation means.
Background technology
Flyash is one of larger industrial residue of the current discharge capacity of China, present stage China's year bed drain purge reached 3,000 ten thousand tons.Along with the development of power industry, the flyash discharge capacity of coal-burning power plant increases year by year.Contain a large amount of unburned carbon granules in flyash, after flotation, can be used as the raw material of making active carbon.
Chinese patent 200810031474.7 discloses a kind of flotation pillar special for fly ash, at flotation column cylindrical shell top, pulp distributer is housed, establish multistage bubbling plate in cylindrical shell, multiple spot swirl-flow devices and multiple spot tail ash spout hole are established in the cylindrical shell bottom, install the ore pulp distributing pipe around pulp distributer, around device circulating line, circulating line upper end and ore pulp distributing pipe connect, lower end and swirl-flow devices connect, ore pulp distributing pipe interface and feed inlet and outlet connect respectively circulating pump two ends, the high-carbon balanced overflow plate of ash and the overflow of high-carbon ash also are housed on flotation column top collects mouthful, tail ash spout hole is connected and installed with tail ash automatic control stuff box by pipeline.
Chinese patent 200920064391.8 discloses a kind of floatation column special for circulating fluidized, at the top, pulp distributer is housed, in establish multistage bubbling plate, the multiple spot swirl-flow devices is established in the bottom, the bottom is connected and installed taper tail ash feeder, install the ore pulp distributing pipe around pulp distributer, the peripheral device circulating line, the ore pulp distributing pipe connects circulating pump, the high-carbon balanced overflow plate of ash also is housed on flotation column top and collects mouthful, taper tail ash feeder its bottom connects tail ash tube road is connected to tail ash automatic control stuff box.
Chinese patent 200920261379.6 discloses a kind of garbage microwave pyrolysis and has produced the stirring floatation equipment that active carbon uses; This stirring floatation equipment comprises: body part F, power section G and stirring flotation part H.Body part F comprises: stir flotation cylinder, frame, the outlet of flotation thing and mixture outlet, power section G comprises: stir the flotation motor and stir the flotation axle, stir the flotation motor and be fixedly installed on described frame, stir the flotation motor and be connected with stirring flotation axle.Stirring flotation part H comprises: stirring vane and flotation blade, stirring vane are fixedly installed on described stirring flotation axle bottom, and the flotation blade is fixedly installed on described stirring flotation axle top.
Chinese patent 200920063583.7 discloses a kind of new equipment of producing active carbon with flyash, comprises that the former ash of flyash that connects successively advances ash bucket, electronic measuring scale, box-type ash remover, ore pulp preprocessor, first order flotation column, second level flotation column, the first thickener, the first filter, the first dryer, active carbon Special grinding, oil water separator, the second dryer; Ore pulp preprocessor and second level flotation column also are connected with the automatic medicament feeding machine of dispersant and composite floating chemical, and the active carbon Special grinding also is connected with the high steam pipeline.
Chinese patent 200820046239.2 discloses a kind of flyash flotation carbon production apparatus, the flyash flotation carbon production apparatus comprises the screening module that can screen the flyash granularity, stirs module, can cleaned coal and tail ash content from flotation module, dehydration module and becomes the conveying mechanism of integral body with upper module organic connections successively.
The shortcoming of technique scheme is that carbon granule is combined with ash content closely usually, be difficult for separately, thereby the flotation efficiency of carbon granule is lower.
Summary of the invention
For the shortcoming of prior art, the purpose of this invention is to provide a kind of flotation separation equipment that can improve the degree of peeling off of carbon granule and ash content.
To achieve these goals, the invention provides a kind of fuel ash flotation separation equipment with physical separation means, the cylindrical shell that it comprises vertical setting is positioned at the overflow collection section at this cylindrical shell top and is positioned at the tail ash collection section of this cylinder body bottom; The overflow collection section is provided with discharging opening, and tail ash collection section is provided with the outlet of tail ash; This flotation separation equipment further comprises:
Be positioned at the loose device of air of cylindrical shell, the surface of this loose device of air is provided with a plurality of pores, and these a plurality of pores are set to point to oblique upper with different angles separately, so that the material in cylindrical shell forms turbulent flow; The surface of being somebody's turn to do loose device of air is larger, is used for bubble and particle are reflected;
Be positioned at the barrel of cylindrical shell or the physical separation means on loose device of air;
Be positioned at the multilayer flotation plate of cylindrical shell, interval setting, a plurality of holes are arranged on the flotation plate; The effect of this flotation plate has two: the one, make the different material layering with different buoyancy; The 2nd, the size of the limited aperture bubble by the hole on the flotation plate.The aperture in the hole on the flotation plate is 0.5 centimetre-5 centimetres, and the flotation plate can be metal, various plastics or other material and makes, and it specifically can be single or multiple lift, 2-5 layer for example, and wherein bottom flotation plate is positioned at the top of loose device of air;
Be positioned at the distributor on top, overflow collection section, distributor is the container that bottom or bottom are provided with many distribution duct, and the end of distribution duct is between loose device of air and bottom flotation plate;
Feeder, this feeder is communicated with a plurality of pores on loose device of air by the first gas pipeline.
Operation principle of the present invention is: the main component of flyash is carbon granule and ash content.After adding flotation agent and/or collecting agent and/or other auxiliary agent, the particle in flyash contacts, collides with bubble, and the carbon granule that floatability is good optionally adheres to bubble, and is carried rising, realizes flotation.The poor ash content of floatability is to sinking.
Workflow of the present invention is: the powdered coal ash in distributor and many distribution duct of mixture through being positioned at distributor bottom or bottom of flotation agent enter cylindrical shell.Feeder is by the air feed in the cylindrical shell of the pore on loose device of air, carbon granule adheres to bubble under the effect of flotation agent, and scatters floating and move upward with turbulent condition, smoothly by the hole on each layer flotation plate, fall on the flotation plate of the superiors, realize the flotation of carbon granule.The carbon granule that floatingly selects is collected in the overflow collection section.The poor ash content of floatability is by the flotation of flotation plate, falls tail ash collection section.In addition, loose device of air also has the effect of reflection, strengthens turbulent effect by reflection.
Because the present invention is provided with physical separation means, effectively broken the combination between carbon granule and ash content, greatly improved the flotation efficiency of carbon.
According to a specific embodiment of the present invention, physical separation means specifically can be ultrasonic separation means or ultrasonic broken in bulk putting, and improves peeling off of carbon granule and ash content by the emission ultrasonic wave, for example, forms granularity and reaches the ultra-fine carbon granule of 10,000 purposes.Particularly, this ultrasonic separation means or ultrasonic broken in bulk putting comprise ultrasonic transmitter and supporting servicing unit.
According to another embodiment of the present invention, loose device of air is that the cone of point upward is bucket-shaped, and its a plurality of pores are located on its conical surface.The purpose that the bucket-shaped loose device of air of cone is set is: to more angle reflection, its reflecting effect is better than plane reflection to the bubble that 1, is combined with carbon granule by the bucket-shaped loose device of air of this cone; 2, loose device of air is jet, and the driving bubble scatters floating in cylindrical shell with turbulent condition, reach better flotation effect; 3, the bubble that does not pass the flotation plate is bored bucket-shaped loose device of air reflection, thereby the effect of having aggravated turbulent motion has improved flotation efficiency.Due in the present invention, the gas that upwards blows is turbulent condition, and the time of contact of carbon granule and bubble is long, contact more abundant, the probability that fly ash grain is broken for carbon granule and ash particles increases greatly, thereby makes flotation effect better, and flotation efficiency is higher.According to another embodiment of the present invention, in order to reach better reflecting effect, the cone bucket angle of the bucket-shaped loose device of air of this cone is 60 °-150 ° (cone bucket angle was the angle between the cross section of axle and two intersections of boring the bucket surface).It specifically can select different cone bucket angles according to different materials, adopts the cone bucket angle of 90 ° as CFB flyash.
According to another embodiment of the present invention, cylindrical shell comprises superposed the first thinner flotation section and the second thicker flotation section that is positioned at the bottom, the overflow collection section is positioned at the outside of the first flotation section, and the bottom of overflow collection section is used for collecting lower than the top of the first flotation section the particle that overflows from the flotation section.For example, the overflow collection section can be hydrostatic column porose on base plate, and the top of the first flotation section passes from the hole on its base plate, and like this, the particle that floatingly selects in the flotation section is constantly upwards piled up, and flows in the overflow collection section with regard to the barrel of crossing the flotation section; And for example, the top exterior walls of the first flotation section is provided with spout hole or overflow pipe, and the overflow collection section is the container that is positioned at this spout hole or overflow pipe below.Particularly, be provided with the divergent cone section as transitional region between the first flotation section and described the second flotation section, this divergent cone section is positioned at the top of bottom flotation plate, specifically can be between two-layer flotation plate, and for example between bottom flotation plate and the last layer flotation plate that is adjacent.By the divergent cone section is set, make flotation separation equipment increase reflecting surface, and then the bubble velocity that comes up from the below is slowed down and adjust its direction of motion, the advantage of doing like this is: the turbulent motion effect of 1, aggravating bubble by reflection; 2, avoid bubble along the top from cylinder wall to flotation separation equipment and make the spillwag chute at top smooth not.
According to another embodiment of the present invention, feeder is connected with the one or more the second gas pipelines, and this second gas pipeline leads in distributor or is connected to distribution duct.For example this second gas pipeline can be one, leads in distributor; Also can be many, be connected respectively to every distribution duct.Like this, can accelerate to enter cylindrical shell by distribution duct by the fly ash grain that gas-powered is positioned at distributor, and then improve the efficient of flotation.Drive with respect to the negative pressure that produces with Venturi tube in prior art the technical scheme that the material in distributor flows downward, both can reduce energy consumption by gas pipeline conveying high-pressure gas, again can be according to what and viscosity adjustments of gas pressure of material, and then improve Product Precision.
According to another embodiment of the present invention, tail ash outlet is connected with the tail ash tube road, and this tail ash tube road directly or indirectly leads to distributor, carries out flotation so that the tail ash reenters flotation separation equipment, thereby improves the flotation efficiency of flyash.
According to another embodiment of the present invention, flotation separation equipment also comprises storage device, and bottom or the bottom of this storage device are provided with charging line, and this charging line leads to distributor.The flyash for the treatment of flotation adds the chemical agents such as flotation agent in storage device, then the charging line of the bottom through being positioned at storage device or bottom enters distributor.Can be provided with agitating device in storage device, be used for powdered coal ash slurry and flotation agent are fully stirred.In this embodiment, the tail ash tube road can be connected to storage device.Because when proceeding flotation from tail ash tube road material out, usually need to add the chemical agents such as flotation agent, and be not easy to add in distributor or control bad ratio when adding, returning to storage device can address this problem well.In addition, can be provided with tail ash bin (utilizing the tail ash to regulate liquid level in flotation separation equipment) between tail ash outlet and storage device, the tail ash tube road first is connected to the tail ash bin from the outlet of tail ash, then leads to storage device from the tail ash bin.Charging line is provided with the slag stock pump, is used for the material pumping in storage device in distributor.
According to another embodiment of the present invention, the height of the end in tail ash tube road is positioned on top layer flotation plate, and the end in this tail ash tube road is provided with liquid level regulation apparatus, is used for regulating the height of the end in tail ash tube road, thereby regulates the liquid level in flotation separation equipment.
According to another embodiment of the present invention, cylindrical shell is cylinder or square tube.The corner of square tube can form reflection, and the distribution of the particle in cylinder and bubble is more even.In addition, in cylindrical shell, the top of tail ash collection section can arrange filter, to slow down the downstream rate of material.
Compared with prior art, the present invention has following beneficial effect:
1, by physical separation means is set, improve peeling off of carbon granule and ash content, form the ultra-fine carbon granule of granularity, thereby greatly improved the flotation efficiency of carbon granule, reduced the internal circulating load of raw material, thereby also greatly reduced energy consumption;
2, avoid using the negative pressure driving material of Venturi tube manufacturing to flow downward, and directly used feeder inject high pressure gas, reduced energy consumption; Gas pressure and the flow velocity of feeder are adjustable, and convenient what and viscosity according to material regulated, and then improved the precision of product.
The present invention is described in further detail below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is that embodiments of the invention 1 are along the structural representation of the longitudinal cross-section of its axis;
Fig. 2 is that embodiments of the invention 2 are along the structural representation of the longitudinal cross-section of its axis;
Fig. 3 is that embodiments of the invention 3 are along the structural representation of the longitudinal cross-section of its axis;
Fig. 4 is that embodiments of the invention 4 are along the structural representation of the longitudinal cross-section of its axis.
The specific embodiment
Embodiment 1
As shown in Figure 1, embodiments of the invention 1 comprise: storage device 1, distributor 2, the cylindrical shell 3 that vertically arranges, the bucket-shaped loose device of air 4 of cone, multilayer flotation plate 5, feeder 6, physical separation means such as ultrasonic separation means 8, tail ash bin 7, filter 9, overflow collection section 301, tail ash collection section 305.
The cylindrical shell 3 that vertically arranges can be divided into three parts, is followed successively by from top to bottom: the first flotation section 302, divergent cone section 303, the second flotation section 304.Wherein, the first flotation section 302 is thinner, is provided with one deck flotation plate 5 in it.The second flotation section 304 is thicker, is provided with the bucket-shaped loose device of air 4 of cone and one deck flotation plate 5 in it.Divergent cone section 303 is the bucket-shaped transitional region of the cone of point upward between the first flotation section 302 and the second flotation section 304.
Tail ash collection section 305 be that the cone of pointed end is bucket-shaped, and its bottom tip place is provided with tail ash outlet 306, and the tail ash exports 306 and is connected with tail ash tube road 307.Be provided with filter 9 between the second flotation section 304 and tail ash collection section 305.
The cone that loose device of air 4 is point upward is bucket-shaped, and its cone bucket angle is 120 °, and its conical surface is provided with a plurality of pores 401; It is positioned at the second flotation section 304, and is positioned at 305 tops, cone bucket-shaped tail ash collection section.Loose device of air 4 is provided with a plurality of ultrasonic separation means 8.
Multilayer (for example two-layer) the flotation plate 5 that the interval arranges lays respectively in the first flotation section 302 and the second flotation section 304, and wherein bottom flotation plate 5 is positioned at the top of the bucket-shaped loose device of air 4 of cone.
Be provided with agitating device 101 in storage device 1, be used for powdered coal ash slurry and flotation agent are fully stirred.Tail ash tube road 307 is connected to tail ash bin 7 from tail ash outlet 306, and tail ash bin 7 is connected to storage device 1 by circulating line 310; The bottom of storage device 1 is provided with charging line 102, and charging line 102 is provided with slag stock pump 103, and this charging line 102 leads to distributor 2.
In addition, also be provided with bypass line on circulating line 310 as removing ash pipeline 311, be equipped with valve on circulating line 310 and removing ash pipeline 311.According to the situation of powdered coal ash and concrete technological requirement, the tail ash can reenter by circulating line 310 and carry out flotation in flotation separation equipment, to reclaim carbon granule wherein; Carbon content in the tail ash is too low, discharges by removing ash pipeline 311.
Feeder 6 connects the first gas pipeline 601 and the second gas pipeline 602; Wherein, the first gas pipeline 601 is communicated with a plurality of pores 401 of cone on bucket-shaped loose device of air 4, and the second gas pipeline 602 leads to distributor 2.
Figure 2 shows that embodiments of the invention 2, the difference of itself and embodiment 1 is: 1, the number of distribution duct 201 is 6; 2, tail ash tube road 307 directly leads to distributor 2, do not have tail ash bin 7 and and storage device 1 between connecting pipe; 3, tail ash tube road 307 is provided with slag stock pump 308; 4, also be provided with bypass line on tail ash tube road 307 as removing ash pipeline 311, be equipped with valve on tail ash tube road 307 and removing ash pipeline 311.Equally, according to the situation of powdered coal ash and concrete technological requirement, the tail ash can reenter by tail ash tube road 307 and carry out flotation in flotation separation equipment, to reclaim carbon granule wherein; Carbon content in the tail ash is too low, discharges by removing ash pipeline 311.
Figure 3 shows that embodiments of the invention 3, the difference of itself and embodiment 1 is: 1, the flotation plate is 3 layers; 2, the number of distribution duct 201 is 4; 3, tail ash bin 7 is positioned at the end in tail ash tube road 307, and is enclosed within outside tail ash tube road 307, and the height of tail ash tube road end is positioned on top layer flotation plate, and the end in tail ash tube road is provided with liquid level regulation apparatus, is used for regulating the height of the end in tail ash tube road; 4, there is no circulating line 310 between tail ash bin 7 and storage device 1.
Embodiment 4
Figure 4 shows that embodiments of the invention 4, the difference of itself and embodiment 1 is: 1, the flotation plate is 3 layers; 2, the number of distribution duct 201 is 4; 3, tail ash outlet 306 places do not connect any pipeline, and the tail ash in flotation separation equipment is directly discharged from tail ash outlet 306.
Although the present invention discloses as above with preferred embodiment, is not to limit scope of the invention process.Any those of ordinary skill in the art, within not breaking away from invention scope of the present invention, when doing a little improvement, namely every equal improvement of doing according to the present invention, should be invention scope of the present invention and contain.
Claims (10)
1. fuel ash flotation separation equipment with physical separation means, the cylindrical shell that it comprises vertical setting is positioned at the overflow collection section at this cylindrical shell top and is positioned at the tail ash collection section of this cylinder body bottom; Described overflow collection section is provided with discharging opening, and described tail ash collection section is provided with the outlet of tail ash; This flotation separation equipment further comprises:
Be positioned at the loose device of air of described cylindrical shell, the surface of this loose device of air is provided with a plurality of pores;
Be positioned at the barrel of described cylindrical shell or the physical separation means on described loose device of air;
Be positioned at the multilayer flotation plate of described cylindrical shell, interval setting, wherein bottom flotation plate is positioned at the top of described loose device of air;
Be positioned at the distributor of top, described overflow collection section, described distributor is the container that bottom or bottom are provided with many distribution duct, and the end of described distribution duct is between described loose device of air and described bottom flotation plate;
Feeder, this feeder is communicated with a plurality of pores on described loose device of air by the first gas pipeline; And
Storage device, the bottom of this storage device is provided with charging line, and this charging line leads to described distributor.
2. flotation separation equipment as claimed in claim 1, wherein, described physical separation means is ultrasonic separation means.
3. flotation separation equipment as claimed in claim 1, wherein, the cone that described loose device of air is point upward is bucket-shaped, and described a plurality of pores are located on its conical surface.
4. flotation separation equipment as claimed in claim 3, wherein, the cone bucket angle of described loose device of air is 60 °-150 °.
5. flotation separation equipment as claimed in claim 1, wherein, described cylindrical shell comprises superposed the first thinner flotation section and the second thicker flotation section that is positioned at the bottom, described overflow collection section is positioned at the outside of described the first flotation section, and the bottom of described overflow collection section is lower than the top of described the first flotation section.
6. flotation separation equipment as claimed in claim 5, wherein, be provided with the divergent cone section as transitional region between described the first flotation section and described the second flotation section, and this divergent cone section is positioned at the top of bottom flotation plate.
7. flotation separation equipment as claimed in claim 1, wherein, described feeder is connected with the one or more the second gas pipelines, and described the second gas pipeline leads in described distributor or is connected to described distribution duct.
8. flotation separation equipment as claimed in claim 1, wherein, the outlet of described tail ash is connected with the tail ash tube road, and described tail ash tube road directly or indirectly leads to described distributor.
9. flotation separation equipment as claimed in claim 8, wherein, the bottom of described storage device is provided with charging line.
10. flotation separation equipment as claimed in claim 9, wherein, described tail ash tube road is connected to described storage device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110156537 CN102284375B (en) | 2011-06-10 | 2011-06-10 | Pulverized fuel ash flotation separation equipment with physical separation device |
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| CN 201110156537 CN102284375B (en) | 2011-06-10 | 2011-06-10 | Pulverized fuel ash flotation separation equipment with physical separation device |
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| CN102284375B true CN102284375B (en) | 2013-06-12 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102240608B (en) * | 2011-06-10 | 2013-08-14 | 福建省龙岩龙能粉煤灰综合利用有限公司 | Coal ash flotation separation equipment provided with reflection cone gas dispersing device |
| CN102284377B (en) * | 2011-06-10 | 2013-08-14 | 福建省龙岩龙能粉煤灰综合利用有限公司 | Pulverized fuel ash flotation separation equipment with divergent cone |
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| SU1005922A1 (en) * | 1981-01-12 | 1983-03-23 | Kholin Aleksandr N | Flotation machine aeration assembly |
| RU2217239C1 (en) * | 2002-04-08 | 2003-11-27 | Ячушко Эмерик Панкратьевич | Pneumatic column-type floatation machine |
| CN201404861Y (en) * | 2009-05-13 | 2010-02-17 | 湖南省电力粉煤灰开发有限公司 | Floatation column special for circulating fluidized bed boiler fly ash |
| CN202113944U (en) * | 2011-06-10 | 2012-01-18 | 福建省龙岩龙能粉煤灰综合利用有限公司 | Powdered coal ash floatation separating equipment with ultrasonic separating unit |
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2011
- 2011-06-10 CN CN 201110156537 patent/CN102284375B/en not_active Expired - Fee Related
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| SU1005922A1 (en) * | 1981-01-12 | 1983-03-23 | Kholin Aleksandr N | Flotation machine aeration assembly |
| RU2217239C1 (en) * | 2002-04-08 | 2003-11-27 | Ячушко Эмерик Панкратьевич | Pneumatic column-type floatation machine |
| CN201404861Y (en) * | 2009-05-13 | 2010-02-17 | 湖南省电力粉煤灰开发有限公司 | Floatation column special for circulating fluidized bed boiler fly ash |
| CN202113944U (en) * | 2011-06-10 | 2012-01-18 | 福建省龙岩龙能粉煤灰综合利用有限公司 | Powdered coal ash floatation separating equipment with ultrasonic separating unit |
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