CN101284257B - Flotation pillar special for fly ash - Google Patents

Flotation pillar special for fly ash Download PDF

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Publication number
CN101284257B
CN101284257B CN2008100314747A CN200810031474A CN101284257B CN 101284257 B CN101284257 B CN 101284257B CN 2008100314747 A CN2008100314747 A CN 2008100314747A CN 200810031474 A CN200810031474 A CN 200810031474A CN 101284257 B CN101284257 B CN 101284257B
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China
Prior art keywords
flotation column
flotation
ash
cylindrical shell
overflow
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Expired - Fee Related
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CN2008100314747A
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Chinese (zh)
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CN101284257A (en
Inventor
沈宗库
管国华
高润秋
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Guizhou Anshun sea fly ash Development Co. Ltd.
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HUNAN ELECTRICITY FLYASH DEVELOPMENT Co Ltd
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Abstract

The invention relates to a special flotation column of coal fly ash, an ore pulp distributor is arranged at the top part of a cylinder body of the special flotation column, a plurality of layers of bubble plates are arranged in the cylinder body, a multi-point rotary flow device and a multi-point fly ash overflow hole are arranged at the lower part of the cylinder body, an ore pulp distributing pipe is arranged at the periphery of the ore pulp distributor, a circulating pipeline is arranged at the periphery of the cylinder body, the upper end of the circulating pipeline is connected and communicates with the ore pulp distributing pipe, the lower end is connected and communicates with the rotary flow device, an interface of the ore pulp distributing pipe and a feed and discharge port are respectively connected with the both ends of a circulating pump, a high carbon ash balance overflow plate and a high carbon ash overflow collection port are further arranged at the upper part of the flotation column, and the fly ash overflow hole is provided with a fly ash automatic regulation box by the connection of the pipeline. The special flotation column is applicable to various requirements, the decarburization effect is good, the continuous operation is stable and reliable, the quality of fine coal is high and the processing ability is great, thus saving energy, increasing efficiency and saving investment.

Description

Flotation pillar special for fly ash
Technical field:
The present invention relates to a kind of material screening installation, be specifically related to a kind of flotation pillar special for fly ash.
Background technology:
The power generation energy resource of thermal power plant produces a large amount of flue gases all from coal-burning boiler during the coal-burning boiler operation, and electric cleaner is isolated dust from flue gas, and this dust is exactly a flyash.The coal-fired fly ash carbon content very low (up to standard) that produces after fully burning, also be can be used for making pulverized fuel ash cement, flyash brick, agricultural composite fertilizer and is used for packing materials such as plastics, body of wall as concrete admixture by in a large number.In recent years, develop the high added value purposes of some flyash especially.
Good flyash is had many uses, but the reason such as insufficient owing to the influence of coal, boiler combustion usually causes the phosphorus content of flyash too high (that is: loss on ignition is too high), and the too high flyash of loss on ignition is except doing brick, essentially no use value goes out of use usually.
Summary of the invention:
Technical problem to be solved by this invention is: solve the problem that above-mentioned prior art exists, a kind of to adapt to effective, the continuous operation of flyash decarburization demand, decarburization, stability that various different loss on ignitions exceed standard high and provide, and quality of cleaned coal is good, parameter is easy to adjust, the unit volume disposal ability is big, energy-conservation, the flotation pillar special for fly ash of reduced investment, remarkable in economical benefits.
The technical solution used in the present invention is: this flotation pillar special for fly ash, at flotation column cylindrical shell top pulp distributer is housed, multilayer bubbling plate is set in the flotation column cylindrical shell, flotation column cylindrical shell bottom is provided with the multiple spot swirl-flow devices, flotation column cylindrical shell bottom is provided with multiple spot tail ash spout hole, install the ore pulp distributing pipe around the pulp distributer, at flotation column cylindrical shell peripheral device circulating line, the circulating line upper end connects with the ore pulp distributing pipe, circulating line lower end and swirl-flow devices connect, on flotation column, a circulating pump interface is respectively left in the bottom, connect with circulating pump, circulating pump is installed in by the flotation column, the circulating pump output interface connects the ore pulp distributing pipe, and the circulating pump input interface connects feed inlet and outlet on the cylindrical shell, and the balanced overflow plate of high-carbon ash is housed on flotation column top, the flotation column upper side also is equipped with the overflow of high-carbon ash collects mouth, and tail ash spout hole is connected and installed with tail ash automatic control stuff box by pipeline.
In the technique scheme, the circulating pump input interface connects the input port more than three, and each input port all connects the feed inlet and outlet on the flotation column cylindrical shell.
In the technique scheme, tail ash automatic control stuff box has tail ash overflow inlet, tail ash overflow outlet, and tail ash overflow inlet is connected and installed with overflow pipe, and the adjusting cap is installed on the overflow pipe.
In the technique scheme, in flotation column or the tail ash automatic control stuff box the digital supervising device of liquid level is installed.
In the technique scheme, circulating line is many, and the ore pulp distributing pipe also has porous, and swirl-flow devices is a multiple spot, and many circulating lines upper end connects with the porous of ore pulp distributing pipe respectively, and many circulating line lower ends connect with the multiple spot swirl-flow devices respectively.
In the technique scheme, the multiple spot swirl-flow devices is a plurality of feed tubes or the nozzle of oblique installation in the same direction on the cylindrical shell.
In the technique scheme, the bubbling plate is drilled with the plate of porous for the plate face.
In the technique scheme, flotation column cylindrical shell bottom also is equipped with a plurality of slurries mixers, prevents that inner barrel tail ash from precipitating, solidifying, harden.
Operation principle of the present invention:
1, pulverized fuel ash slurry distributes to enter in the flotation column by the pulp distributer at flotation column top uniformly.
2, flyash middle level slurry enters circulating pump by the multiple spot feed inlet and outlet, enter flotation column top annular pipe again, be assigned to 12 circulation delivery outlets, through circulating line, at last by the multiple spot swirl-flow devices, slurries are rotated in flotation column, high-carbon in flyash ash floating upward quickly, and the high-carbon ash that flotates is overflowed to gathering-device by the balanced overflow plate of high-carbon ash.
3, the tail ash of flyash overflows to tail ash automatic control stuff box by the bottom multiple spot discharging opening of flotation column, enters tail ash gathering-device again.
Distinguishing feature of the present invention:
1, tail ash multiple spot overflow, flotation column of the present invention bottom are provided with the tail ash flooding point more than three, have solved tail ash plugging problem, and system is moved continuously.
2, the present invention is provided with the balanced overflow plate of high-carbon ash, guaranteed the high-carbon ash with the speed of equilibrium to peripheral overflow.
3, the present invention is provided with tail ash automatic control stuff box, and it is poor with the spillwag chute of tail ash to regulate the high-carbon ash automatically, improves high-carbon ash flotation precision.
4, circulating pump input interface is provided with the input port more than three, can guarantee the balanced distribution of middle part slurries, repeatedly circulation, makes high carbon granule have sufficient time and tail ash to break away from, thus the raising flotation efficiency.
5, by adjusting circulating pump parameter, tail ash automatic control stuff box parameter, and be used in combination the digital supervising device of liquid level, can include the control of flotation column in the host computer automatic control system, realize operating computerization.
The flotation decarburization principle of flotation pillar special for fly ash
What flotation pillar special for fly ash was used is that charcoal is taken off in the wet method flotation.The basic principle of its decarburization is:
Because the remaining char particle in the flyash is the hydrophilic particle of high degree of dispersion, therefore, the method for wet method flotation is to add flotation agent in buck, and on the one hand, flotation agent is stronger than ash with the affinity of coal grain; On the other hand, because flotation agent is a kind of heteropolarity material, can change coal grain surface moist in the water, make coal grain surface become hydrophobicity, thereby be attached on the bubble, along with the running of flotation column by hydrophily, the coal agglomerate tabling is to the water surface, thereby realized that the coal grain separates with the liquid-solid of buck.
The coal grain that FLOTATION SEPARATION is come out as thickener, filter, promptly becomes the fine coal powder of high carbon content again through other equipment after the dehydration.The tail ash that FLOTATION SEPARATION is come out then is the flyash of low carbon content after other equipment such as thickener, filter dehydration.The waste liquid of flotation is recycling by system repeatedly.
The major parameter of flotation pillar special for fly ash
Model HFT-10 HFT-15 HFT-20 JFT-25 HFT-30 HFT-40 HFT-50 HFT-60
Column diameter mm 1,000 1,500 2,000 2,500 3,000 4,000 5,000 6000
Height of column mm 5,000 5,000 5,500 5,500 5,500 6,200 6,200 6200
Give birth to mortar 100-150 150-200 200-250 250-300 200-300 350-400 400-450 450-550
Produce (m 3/ h)
Can dry ash 10-15 15-20 20-25 25-30 30-35 35-40 40-45 45-55
Power (t/h)
Circulation pump power 15 30 45 55 75 110 132 200
(kw)
Band water weight (t) 17.5 34.4 54.8 69.3 73.6 97.2 123.5 143.5
The present invention through repetition test, has done revolutionary improvement according to chemistry, the physical characteristic of flyash, and advantageous effect is as follows:
(1). the overflow of tail ash multiple spot, not plugging guarantees the continuous operation of system.
(2). charging is provided with bascule, and Flow of Goods and Materials stability is improved.
(3). regulate the cleaned coal spillwag chute discrepancy in elevation automatically, improve the precision of flotation, quality of cleaned coal is good.
(4). the middle part slurries repeatedly circulate, and make carbon granule have sufficient time and ash particle to break away from, and have improved the rate of producing coal.
(5). parameter is easy to adjust, and the unit volume disposal ability is big, and is energy-conservation, reduced investment, remarkable in economical benefits.The decarburization effect of flotation pillar special for fly ash
Flotation pillar special for fly ash is mainly used in from the flyash that loss on ignition exceeds standard and selects fine coal powder by flotation, and the caloric value of smart charcoal is the 3200-4800 kilocalorie.The loss on ignition of the flyash after the decarburization is about 5%.
Loss on ignition exceeds standard that the decarburization effect of flyash is looked the loss on ignition size of former ash and different, and relevant with the quality of raw coal.Generally speaking, loss on ignition is big more, and then smart carbon content is high more.
Through experiment, certain flyash (former ash) loss on ignition is 25%, and after the flotation pillar special for fly ash carbonization treatment, the smart charcoal productive rate of flotation reaches 44%, smart carbon content 50%, and the loss on ignition of the flyash after the decarburization is less than 5%.
Test data:
The former ash of wet fly-ash, wet low charcoal ash quality index table
Title loss on ignition (%) fineness (45U tails over) SO
Flyash former grey 25 22.3≤3
Hang down charcoal ash＜5 22.3≤3 after taking off charcoal
Floatation clean coal quality index table
Title fixed carbon (%) fugitive constituent (%) caloric value (kilocalorie)
Floatation clean coal 50 3 3500--3700
The material balance of decarbonization process
The supplies consumption quota
Title moisture content ton/ton. flyash
% siccative wet feed
Former grey 15 1----of flotation
Smart powdered carbon 15 1 1.176
The wet ash 15 1 1.176 of low charcoal
Description of drawings:
Fig. 1 is a structural representation of the present invention
Fig. 2 is Fig. 1 main body vertical view
Fig. 3 is Fig. 1 main body left view
Fig. 4 is that the A-A of Fig. 3 is to schematic diagram
The specific embodiment:
Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4, flotation pillar special for fly ash of the present invention, at flotation column cylindrical shell 1 top pulp distributer 2 is housed, the flyash ore pulp is from input here, the balanced overflow plate gap that distributes by many umbrellas enters in the flotation column cylindrical shell then, multilayer bubbling plate 3 is set in the flotation column cylindrical shell 1, bubbling plate 3 constitutes for being drilled with porous on the flat board, flotation column cylindrical shell 1 bottom is provided with multiple spot swirl-flow devices 4, and multiple spot swirl-flow devices 4 is exactly a plurality of feed tubes of oblique in the same direction installation or a nozzle on the cylindrical shell.Flotation column cylindrical shell 1 bottom is provided with multiple spot tail ash spout hole 5, avoid the tail ash to stop up outlet, ore pulp distributing pipe 6 is installed around the pulp distributer 2, at flotation column cylindrical shell 1 periphery circulating line 7 is installed, circulating line 7 is many, circulating line 7 upper ends and ore pulp distributing pipe 6 connect, each circulating line 7 lower end connects with multiple spot swirl-flow devices 4 respectively, on flotation column, a circulating pump interface 8 is respectively left in the bottom, 9, connect circulating pump 10, circulating pump 10 is installed in by the flotation column, and the balanced overflow plate 11 of high-carbon ash is housed on flotation column top, the balanced overflow plate 11 of high-carbon ash is a polylith, be umbrella, the vertical installation, high-carbon balanced overflow plate 11 1 ends of ash and pulp distributer are connected and fixed, the other end and cylindrical shell 1 are connected and fixed, and the flotation column upper side is equipped with the overflow of high-carbon ash collects mouth 12.Tail ash spout hole 5 is connected and installed with tail ash automatic control stuff box 14 by pipeline 13.Above-mentioned circulating pump 10 input interfaces connect the input port more than three, and each input port connects the middle level slurry feed inlet and outlet on the flotation column cylindrical shell, and circulating pump 10 output interfaces connect the ore pulp distributing pipe.Tail ash automatic control stuff box 14 has tail ash overflow inlet 15, tail ash overflow outlet 16, and tail ash overflow inlet is connected and installed with overflow pipe, has the adjusting cap on the overflow pipe.In flotation column or the tail ash automatic control stuff box the digital supervising device of liquid level is installed.The multiple spot swirl-flow devices is that a plurality of feed tubes or nozzle 17 are installed on the cylindrical shell in the same direction.Bubbling plate 3 constitutes for the plate face is drilled with porous.Flotation column cylindrical shell 1 bottom also is equipped with a plurality of slurries mixers 18, prevents that cylindrical shell bottom tail ash from precipitating, solidifying, harden.

Claims (5)

1. flotation pillar special for fly ash, it is characterized in that pulp distributer being housed at flotation column cylindrical shell top, multilayer bubbling plate is set in the flotation column cylindrical shell, flotation column cylindrical shell bottom is provided with the multiple spot swirl-flow devices, the multiple spot swirl-flow devices is a plurality of feed tubes or the nozzle of oblique installation in the same direction on the flotation column cylindrical shell, flotation column cylindrical shell bottom is provided with multiple spot tail ash spout hole, the ore pulp distributing pipe is set around the pulp distributer, at flotation column cylindrical shell periphery circulating line is set, circulating line is many, the ore pulp distributing pipe also has porous, many circulating lines upper end connects with the porous of ore pulp distributing pipe respectively, many circulating line lower ends connect with the multiple spot swirl-flow devices respectively, on flotation column, a circulating pump interface is respectively left in the bottom, connect with circulating pump, circulating pump is installed in by the flotation column cylindrical shell, the circulating pump output interface connects the ore pulp distributing pipe, the circulating pump input interface connects the input port more than three, each input port connects the middle level slurry feed inlet and outlet on the flotation column cylindrical shell, the balanced overflow plate of high-carbon ash is housed on flotation column top, the flotation column upper side also is equipped with the overflow of high-carbon ash collects mouth, and tail ash spout hole is connected and installed with tail ash automatic control stuff box by pipeline.
2. flotation pillar special for fly ash according to claim 1 is characterized in that tail ash automatic control stuff box has tail ash overflow inlet, tail ash overflow outlet, and tail ash overflow inlet is connected and installed with overflow pipe, and the adjusting cap is installed on the overflow pipe.
3. flotation pillar special for fly ash according to claim 1 is characterized in that being equipped with in flotation column or the tail ash automatic control stuff box the digital supervising device of liquid level.
4. flotation pillar special for fly ash according to claim 1 is characterized in that the bubbling plate is drilled with the plate of porous for the plate face.
5. flotation pillar special for fly ash according to claim 1 is characterized in that flotation column cylindrical shell bottom also is equipped with a plurality of slurries mixers.
CN2008100314747A 2008-06-13 2008-06-13 Flotation pillar special for fly ash Expired - Fee Related CN101284257B (en)

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CN101284257B true CN101284257B (en) 2011-01-26

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JP4802305B2 (en) 2009-07-17 2011-10-26 独立行政法人科学技術振興機構 Floating separation apparatus and method, and manufacturing method of product using the same
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
CN102240609B (en) * 2011-06-10 2013-06-12 福建省龙岩龙能粉煤灰综合利用有限公司 Internal-external coal ash multistage flotation separation system
CN102284376B (en) * 2011-06-10 2013-03-06 福建省龙岩龙能粉煤灰综合利用有限公司 Internal-internal fly ash multi-stage flotation separation system
CN102284374B (en) * 2011-06-10 2013-03-06 福建省龙岩龙能粉煤灰综合利用有限公司 External-internal type pulverized fuel ash multilevel flotation separation system
CN102284371B (en) * 2011-06-22 2013-01-09 李冠东 Column combined reinforced high-efficiency flotation method and flotation equipment thereof
CN102240610B (en) * 2011-07-04 2013-03-06 福建省龙岩龙能粉煤灰综合利用有限公司 Self-gas supply mixed fly ash multistage flotation separation system
CN102274802B (en) * 2011-07-13 2013-06-05 中国矿业大学 System and method for deeply purifying coal
CN102698879A (en) * 2012-05-09 2012-10-03 山东莱芜煤矿机械有限公司 Flotation column special for floating fine flake graphite
CN103934098A (en) * 2014-05-15 2014-07-23 华东理工大学 High-carbon pulverized coal ash/coal slag decarbonization and classification method and device
CN105319161B (en) * 2015-11-18 2018-10-02 河南理工大学 A kind of device suitable for the observation of flotation bubble mineralization process
CN105498981B (en) * 2016-02-23 2017-08-25 中国矿业大学 High-carbon fly ash flotation decarbonization process with foam stabilization characteristic
CN107225041A (en) * 2016-03-25 2017-10-03 贵州安顺惠海粉煤灰开发有限公司 A kind of double helix frequency conversion classification thickness seperator and its separation method

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