CN102284376B - Internal-internal fly ash multi-stage flotation separation system - Google Patents
Internal-internal fly ash multi-stage flotation separation system Download PDFInfo
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- CN102284376B CN102284376B CN 201110156606 CN201110156606A CN102284376B CN 102284376 B CN102284376 B CN 102284376B CN 201110156606 CN201110156606 CN 201110156606 CN 201110156606 A CN201110156606 A CN 201110156606A CN 102284376 B CN102284376 B CN 102284376B
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Abstract
The invention discloses an internal-internal fly ash multi-stage flotation separation system. The system comprises at least two flotation separation devices, wherein each flotation separation device comprises a barrel, an overflow collection section, a tail ash collection section, a gas dispersing device, a plurality of layers of flotation plates, a distribution device and a gas supply device; a first flotation separation device also comprises a storage device; the storage device is provided with a feeding pipeline which is communicated with the distribution device of the first flotation separation device; and a discharge hole of the first flotation separation device is communicated with the distribution device of a second flotation separation device through a discharge pipeline. The gas dispersing device is arranged in each flotation separation device, and a plurality of gas holes of the gas dispersing device point to an upper inclined side at different angles, so that a material in the barrel forms turbulent current, and a better flotation effect is achieved; and the surface of the gas dispersing device has a reflecting effect, so that the turbulent current effect can be enhanced, bubbles and particles can rebound and move upward again, and the flotation rate can be effectively improved.
Description
Technical field
The present invention relates to utilize flyash to make active carbon, more particularly, the present invention relates to a kind of Nei-Nei Shi pulverized fuel ash multilevel flotation separation system.
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 the 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 multilayer bubbling plate in the 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 the pulp distributer, around device circulating line, the circulating line upper end connects with the ore pulp distributing pipe, lower end and swirl-flow devices connect, ore pulp distributing pipe interface and feed inlet and outlet connect respectively the circulating pump two ends, the high-carbon balanced overflow plate of ash and high-carbon ash overflow collection mouth also are housed on flotation column top, and 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 multilayer 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 the 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 mouth, the tail ash tube road that its bottom of taper tail ash feeder connects 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 the 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 the conveying mechanism that becomes integral body with upper module successively organic connections.
The shortcoming of technique scheme is: usually adopt rotational flow gas or laminar flow gas to push bubble and move upward, the movement locus of fly ash grain is on the screw or straight line makes progress, and flotation effect is poor; Reflecting surface is not set, and the bubble that falls and particle directly enter the outlet of tail ash, have wasted energy consumption.
Summary of the invention
For the shortcoming of prior art, the purpose of this invention is to provide a kind of fly ash grain is upwards pushed with turbulent condition and in a cyclic process by the flotation-separation system of Multi reflection.
To achieve these goals, the invention provides a kind of Nei-Nei Shi pulverized fuel ash multilevel flotation separation system, this system comprises at least two floatation separators, each floatation separator includes the cylindrical shell of vertical setting, is positioned at the overflow collection section and the tail ash collection section that is positioned at this cylinder body bottom at this cylindrical shell top; The overflow collection section is provided with discharging opening; Tail ash collection section is provided with the outlet of tail ash; Each floatation separator 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 the 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 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 of top, overflow collection section, this 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 the loose device of air by the first gas pipeline; In addition, above-mentioned at least two-stage floatation separator also can share a feeder, and this feeder is communicated with pore on the loose device of air of each floatation separator respectively by many first gas pipelines;
Wherein, the first floatation separator also comprises storage device, flotation agent and treat that the particle of flotation adds in this storage device; Bottom or the bottom of this storage device are provided with charging line, and this charging line leads to the distributor of the first floatation separator; This storage device is also led in the tail ash outlet of the first floatation separator;
The discharging opening of the first floatation separator is connected by the distributor of discharge pipe with the second floatation separator.
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 the 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 then to sinking.The carbon granule that the first floatation separator floatingly selects enters and carries out the flotation second time in the second floatation separator, to improve phosphorus content.
The workflow of this system can be divided into two stages: the phase I in the first floatation separator and the second stage in the second floatation separator.
Wherein the phase I is (all belonging to the first floatation separator with lower member): the powdered coal ash slurry in storage device adds flotation agent, forms mixed material.The charging line of this mixed material through being positioned at storage device bottom or bottom enters distributor.Powdered coal ash in the 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 the 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 poor ash content of floatability is fallen tail ash collection section then not by the flotation of flotation plate.The carbon granule that floatingly selects is collected in the overflow collecting layer, and from discharging opening in discharge pipe enters the distributor of the second floatation separator, begun the second stage of flotation.
Second stage be that the carbon granule that floatingly selects with the phase I is as the further flotation of raw material, to make the higher particle of phosphorus content.Its flow process and phase I are similar, are specially (all belonging to the second floatation separator with lower member): many distribution duct of particle through being positioned at distributor bottom or bottom in the distributor enter cylindrical shell.Feeder is by the air feed in the cylindrical shell of the pore on the 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 fallen tail ash collection section then not by the flotation of flotation plate.
Owing to all being provided with loose device of air in each floatation separator, a plurality of pores of loose device of air are set to point to oblique upper with different angles separately, make the material in the cylindrical shell form turbulent flow, reach better flotation effect.In addition, the surface of this loose device of air also has the effect of reflection, both can strengthen the effect of turbulent flow, and bubble and particle are moved upward again through bounce-back, can effectively improve the flotation rate.
According to a specific embodiment of the present invention, at least one floatation separator, loose device of air is that the cone of point upward is bucket-shaped, and a plurality of pores are located on its conical surface.The purpose that the bucket-shaped loose device of air of this 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 the flotation rate.Because 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 so that flotation effect is better, flotation efficiency is higher.According to another embodiment of the present invention, in order to reach better reflecting effect, this cone bucket angle of boring bucket-shaped loose device of air 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 90 ° cone bucket angle such as CFB flyash.
According to another embodiment of the present invention, in at least one floatation separator, 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 lower than the top of the first flotation section, is used for collecting the particle that overflows from the flotation section.For example, the overflow collection section can be hydrostatic column porose on the 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 floatation separator 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: 1, the turbulent motion effect by reflection aggravation bubble; 2, avoid bubble along the top from cylinder wall to floatation separator and make the spillwag chute at top smooth not.
According to another embodiment of the present invention, at least one floatation separator, feeder is connected with the one or more the second gas pipelines, and the second gas pipeline leads in the distributor or is connected to distribution duct.For example this second gas pipeline can be one, leads in the distributor; Also can be many, be connected respectively to every distribution duct.In addition, whole system can only arrange a feeder, and this feeder delivers gas to loose device of air and the distributor of floatation separators at different levels by different pipelines.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 the technical scheme that the material in the distributor flows downward with respect to the negative pressure that produces with Venturi tube in the prior art, 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, at least one floatation separator, also comprise the physical separation means that is positioned on barrel or the loose device of air.By physical separation means is set, effectively break the combination between carbon granule and the ash content, greatly improved the flotation rate of carbon.This 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, 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, in each floatation separator, the outlet of tail ash is connected with the tail ash tube road, and this tail ash tube road is connected to distributor.The effect that arranges like this is: the tail ash by the flotation plate does not reenter floatation separator through distributor and carries out flotation, thereby has improved the flotation rate.
According to another embodiment of the present invention, cylindrical shell is cylinder and/or square tube.The corner of square tube can form reflection, and the distribution of the particle in the cylinder and bubble is more even.
In addition, the top of tail ash collection section can arrange filter in the cylindrical shell, to slow down the downstream rate of material.
In addition, can be provided with the slag stock pump on each bar charging line, tail ash tube road, the discharge pipe, so that the conveying of material.
Compared with prior art, the present invention has following beneficial effect:
1, owing to all being provided with loose device of air in each floatation separator, a plurality of pores of loose device of air are set to point to oblique upper with different angles separately, make the material in the cylindrical shell form turbulent flow, reach better flotation effect;
2, the surface of loose device of air also has the effect of reflection, both can strengthen the effect of turbulent flow, and bubble and particle are moved upward again through bounce-back, can effectively improve the flotation rate.
The present invention is described in further detail below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is that specific embodiments of the invention are along the structural representation of the longitudinal cross-section of its axis.
The specific embodiment
As shown in Figure 1, specific embodiments of the invention comprise the two-stage floatation separator.
Wherein, the first floatation separator comprises: 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 device 8, discharge pipe 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 loose device of air 4 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, and tail ash tube road 307 is provided with slag stock pump 308.Between the second flotation section 304 and tail ash collection section 305, be provided with filter 9.
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 the flotation plate 5 of bottom is positioned at the top of the bucket-shaped loose device of air 4 of cone.
Be provided with agitating device 101 in the storage device 1, be used for powdered coal ash slurry and flotation agent are fully stirred.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.
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 the bucket-shaped loose device of air 4, and the second gas pipeline 602 leads to distributor 2.Also be provided with bypass line on the tail ash tube road 307 as removing ash pipeline 311, be equipped with valve on tail ash tube road 307 and the removing ash pipeline 311.According to powdered coal ash situation and technological requirement, the tail ash can reenter by tail ash tube road 307 and carry out flotation in the first floatation separator, to reclaim carbon granule wherein; Carbon content in the tail ash is excessively low, then discharges by removing ash pipeline 311.
The second floatation separator comprises: 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 device 8 ', 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 loose device of air 4 ' and one deck flotation plate 5 ' in it.Divergent cone section 303 ' is positioned between the first flotation section 302 ' and the second flotation section 304 ', is the bucket-shaped transitional region of the cone of point upward.
Overflow collection section 301 ' is positioned at the outside of the first flotation section 302 ', and the top of the first flotation section 302 ' is positioned between the top and bottom of overflow collection section 301 '; In addition, the bottom of overflow collection section 301 ' is provided with discharging opening 309 '.
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 ', and tail ash tube road 307 ' is provided with slag stock pump 308 '.Between the second flotation section 304 ' and tail ash collection section 305 ', be provided with filter 9 '.
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 ' top, the bucket-shaped tail ash of cone 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 the flotation plate 5 ' of bottom is positioned at the top of the bucket-shaped loose device of air 4 ' of cone.
Distributor 2 ' is positioned at 301 ' top, overflow collection section, is provided with the container of many (for example 8) distribution duct 201 ' for the bottom.The end of distribution duct 201 ' is positioned within the second flotation section 304 ', bores between bucket-shaped loose device of air 4 ' and the bottom flotation plate 5 '.Tail ash tube road 307 ' is connected to distributor 2 '.Also be provided with bypass line on the tail ash tube road 307 ' as removing ash pipeline 311 ', be equipped with valve on tail ash tube road 307 ' and the removing ash pipeline 311 '.According to concrete technological requirement, the tail ash can reenter by tail ash tube road 307 ' and carry out flotation in the first floatation separator, to reclaim carbon granule wherein; Carbon content in the tail ash is excessively low, then discharges by removing ash pipeline 311 '.
The other end of the discharge pipe 701 of the first floatation separator connects the distributor 2 ' of the second floatation separator.
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 the bucket-shaped loose device of air 4 ', and the second gas pipeline 602 ' leads to distributor 2 '.
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 contains.
Claims (12)
1. Yi Zhong Nei-Nei Shi pulverized fuel ash multilevel flotation separation system, this system comprises at least two floatation separators, described each floatation separator includes the cylindrical shell of vertical setting, is positioned at the overflow collection section and the tail ash collection section that is positioned at this cylinder body bottom at this cylindrical shell top; Described overflow collection section is provided with discharging opening; Described tail ash collection section is provided with the outlet of tail ash; Each floatation separator 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 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 the bottom is 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 the described loose device of air by the first gas pipeline;
Wherein, the first floatation separator also comprises storage device, and the bottom of this storage device is provided with charging line, and this charging line leads to the distributor of described the first floatation separator; This storage device is also led in the tail ash outlet of the first floatation separator;
The discharging opening of described the first floatation separator is connected by the distributor of discharge pipe with the second floatation separator.
2. flotation-separation system as claimed in claim 1, wherein, described distributor is the container that the bottom is provided with many distribution duct.
3. flotation-separation system as claimed in claim 1, wherein, the bottom of described storage device is provided with charging line.
4. such as the described flotation-separation system of one of claim 1-3, wherein, at least one described floatation separator, 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.
5. flotation-separation system as claimed in claim 4, wherein, the cone bucket angle of described loose device of air is 60 °-150 °.
6. such as the described flotation-separation system of one of claim 1-3, wherein, in at least one described floatation separator, 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.
7. flotation-separation system as claimed in claim 6 wherein, is 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.
8. such as the described flotation-separation system of one of claim 1-3, wherein, in at least one described floatation separator, described feeder is connected with the one or more the second gas pipelines, and described the second gas pipeline leads in the described distributor or is connected to described distribution duct.
9. such as the described flotation-separation system of one of claim 1-3, wherein, at least one described floatation separator, also comprise the physical separation means that is positioned on barrel or the described loose device of air.
10. flotation-separation system as claimed in claim 9, wherein, described physical separation means is ultrasonic separation means.
11. such as the described flotation-separation system of one of claim 1-3, wherein, in each described floatation separator, the outlet of described tail ash is connected with the tail ash tube road, this tail ash tube road is connected to described distributor.
12. such as the described flotation-separation system of one of claim 1-3, wherein, described cylindrical shell is the assembly of cylinder, square tube or cylinder and square tube.
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| CN 201110156606 CN102284376B (en) | 2011-06-10 | 2011-06-10 | Internal-internal fly ash multi-stage flotation separation system |
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| CN 201110156606 CN102284376B (en) | 2011-06-10 | 2011-06-10 | Internal-internal fly ash multi-stage flotation separation system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6960294B2 (en) * | 2001-06-12 | 2005-11-01 | Hydrotreat, Inc. | Apparatus for the separation of solids from liquids by dissolved gas floatation |
| CN1962074A (en) * | 2006-11-25 | 2007-05-16 | 中国矿业大学 | Column type short-stage tungseten crude grading process and equipment |
| CN101284257A (en) * | 2008-06-13 | 2008-10-15 | 湖南省电力粉煤灰开发有限公司 | Flotation pillar special for fly ash |
| CN101306398A (en) * | 2007-05-15 | 2008-11-19 | 上海大屯能源股份有限公司 | Microbubble swirl separation method and divice |
| CN202151595U (en) * | 2011-06-10 | 2012-02-29 | 福建省龙岩龙能粉煤灰综合利用有限公司 | Inner-inner tandem type fly ash flotation separation system |
-
2011
- 2011-06-10 CN CN 201110156606 patent/CN102284376B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6960294B2 (en) * | 2001-06-12 | 2005-11-01 | Hydrotreat, Inc. | Apparatus for the separation of solids from liquids by dissolved gas floatation |
| CN1962074A (en) * | 2006-11-25 | 2007-05-16 | 中国矿业大学 | Column type short-stage tungseten crude grading process and equipment |
| CN101306398A (en) * | 2007-05-15 | 2008-11-19 | 上海大屯能源股份有限公司 | Microbubble swirl separation method and divice |
| CN101284257A (en) * | 2008-06-13 | 2008-10-15 | 湖南省电力粉煤灰开发有限公司 | Flotation pillar special for fly ash |
| CN202151595U (en) * | 2011-06-10 | 2012-02-29 | 福建省龙岩龙能粉煤灰综合利用有限公司 | Inner-inner tandem type fly ash flotation separation system |
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