CN105521738A - Integrated slurry mixing equipment for difficult-to-float fine coal - Google Patents

Abstract

The invention relates to the field of coal slurry pretreatment, in particular to integrated slurry mixing equipment for difficult-to-float fine coal. The equipment comprises a mixing box, wherein a drive shaft is vertically arranged in an inner cavity of the mixing box, and an electric field activation layer, an ultrasonic wave shocking layer and a forced stirring layer are sequentially arranged in the inner cavity of the mixing box from top to bottom in the length direction of the drive shaft. The equipment further comprises a pressurized gas dissolving box, an air inlet pipe used for introducing high-pressure air is arranged in a box body of the pressurized gas dissolving box, and a feeding partition board used for realizing opening and closing of an inlet end is arranged at an inlet end, used for being communicated with a discharge port of the mixing box, of the box body and is fastened through an extension spring and butted against the inlet end to close the inlet end; an outlet end of the box body is connected with a floatation machine, and a discharging partition board used for realizing opening and closing of the position is arranged at the outlet end, is tensioned through a compression spring and closes the outlet end. The equipment has a good conditioning function on floated coal mud, particularly meets the slurry mixing and conditioning demands of the difficult-to-float fine coal, has high working efficiency and rapidly and conveniently performs pretreatment.

Description

A kind of integrated form difficulty selects duff size mixing equipment

Technical field

The present invention relates to coal slurry preprocessing technical field, be specifically related to select fine slime to size mixing for the grey difficulty of height and select duff size mixing equipment with a kind of integrated form difficulty of upgrading.

Background technology

Because the floatability of China's coal slime is generally poor, therefore coal slurry pretreatment is requisite link in floatation coal separation technique, is the prerequisite that flotation device obtains good technical-economic index.The pretreated necessity of coal slurry mainly contains following 4 points: 1), by floating agent (nonpolar oils collecting agent and foaming agent) fully disperse, the floating agent of coal slime is insoluble or be slightly soluble in water, only have and it is fully dispersed into a large amount of fine droplets, could by its Homogeneous phase mixing in coal slurry; 2), by the floating agent of dispersion be blended in float coal slurry well, nonpolar oils collecting agent forms comparatively stable oil film on the coal grain surface of different-diameter, improves the hydrophobicity of coal grain; 3), floating agent needs certain action time at coal grain surface generation physical-chemical reaction; 4) float coal slurry, will be entered and be diluted to rational concentration range.

In the pretreatment process of coal slurry, the dispersion of current flotation agent generally has three kinds of modes:

(1), mechanical dispersion

China is after the XY series ore pulp preprocessor that the eighties in last century researches and develops is that flotation agent is incorporated into dosing nozzle, by the upper strata blade rotary in agitator arm stator mixer, mechanically disperse, because the linear velocity of agitator arm is limited, be only 8.0m/s, the droplet diameter disperseed is comparatively large, is mixed to get even not, adds flotation agent consumption in coal slurry.

(2), emulsion dispersion

In the water-jetting emulsor structure that some coal preparation plants of China promote the use of, be roughly press water and spray from nozzle at high speeds, in jet chamber, form negative pressure.Flotation agent sucks thus and wraps up in and is rolled onto among jet, and through hydraulic blow, shearing, be separated into the oil droplet of < 15 μm, emulsion is sprayed by mixing tube.But this water-jetting emulsor is all one-sided mode of being used as medicine usually, the gas pressure which causes jet to be subject to is unstable, and the mixture homogeneity between medicament and water liquid is often lower, still treats further improvement.

(3) aerosol dispersion

The XK series kaskad apparatus for pre-flotation pulp conditioning brought into use in China the eighties in last century, as application people be Tangshan Guohua Technology Co., Ltd in the patent name that on January 15th, 2010 applies for be " being atomized hybrid coal paste preprocessor " (application number: patent of invention text 201010033384.9) just discloses following technical scheme: its by atomization system, upper box body and lower part box three part form.Atomization system is made up of main motor, flexible coupling, sleeve, haze dish and dosing funnel etc.Upper box body is charging and flotation agent atomization workspace, and have center feed chute outside casing, there is overflow launder the left and right sides.Lower part box is the well-mixed working space of coal slurry and flotation agent, and the left and right sides is all provided with three pieces of upper slides and two pieces of lower skateboards, uniform contour bank bar on each slide plate.During actual use, flotation agent flows into through dosing funnel and pipeline and hazes in the sleeve of dish top, and splashes down at the Pan Zhengmianzhongxinqu that hazes, and the card sticking to High Rotation Speed forms one deck thin liquid film, under the influence of centrifugal force to plate edge motion, be droplet by the saw cut of plate edge; Entering float coal Jiang Jing center feed chute is assigned in the downflow weir of upper box body both sides, wide in waterfall shape overflow along weir, it meets with flotation agent droplet letting out in process, some droplet directly drops to ground floor upper slide by gravity, afterwards, be mixed with the bank bar of coal slurry by upper and lower slide plate of flotation agent, jump up continuously and mix, coal slurry is fully mixed with flotation agent droplet, enters flotation device until discharge from bottom half.As coal slurry pretreatment unit comparatively advanced in field, its flotation agent drop will a less order of magnitude than the drop of emulsion dispersion, and dispersion effect is better; But, it is found that when reality uses, dispersion effect due to floating agent in said structure all relies on dish rotation of hazing to realize, often need one for the formation of the sealed shape casing of confined space, the meaningless of vaporific medicament can be avoided to fly away, it is poor and be easy to send product bug, cannot realize direct vision for slurries mixed process and even produce fault being also difficult to many defects such as Timeliness coverage that the formation of its closed environment but often causes the dish working environment that such as hazes, thus bring puzzlement to execute-in-place and maintenance work; In addition, the dish that hazes of high-speed rotation, too high for drive motors rotation speed requirements, the secondary motor of rotating speed up to 3000 revs/min also namely must be adopted can to ensure its service behaviour, this is all actual assembling, purchase and even maintenance cost cause severe challenge.

Summary of the invention

The object of the present invention is to provide a kind of structure simple and rational integrated form difficulty selects duff size mixing equipment, good modified effect can be played to entering float coal mud, especially be applicable to the upgrading demand of sizing mixing of difficult floating Bed for Fine Coal, its operating efficiency is high and preprocessing process is quick and convenient.

For achieving the above object, present invention employs following technical scheme:

A kind of integrated form difficulty selects duff size mixing equipment, and it is characterized in that: this equipment at least comprises blending bin, charging aperture is positioned at the top end face place of blending bin and discharging opening is positioned at blending bin bottom end; Blending bin inner chamber plumbing arrangement driving shaft, blending bin inner chamber from top to bottom arranges electric field active layer, ultrasonic oscillation layer and action of forced stirring layer successively along driving shaft length direction; Be horizontally disposed with lower electrode plate in blending bin, the top wall level of blending bin arranges upper electrode plate, and two battery lead plate polarity form above-mentioned electric field active layer with region between relatively; Below lower electrode plate, arrange inclination angle fall plate, inclination angle is fallen space between plate and lower electrode plate and is formed ultrasonic oscillation layer; Inclination angle is fallen plate profile and is constructed in the bell mouth shape extended to drive axis direction declivity by blending bin inwall, and inclination angle is fallen on plate and arranged that the ultrasonic wave for ultrasonic oscillation shakes plate; Ultrasonic oscillation layer entrance point is communicated with the port of export of electric field active layer and is positioned at the high-end place that plate is fallen at inclination angle, and the gap having between plate low side and driving shaft and fall for mixed liquor is fallen at inclination angle, and this gap forms the port of export of ultrasonic oscillation layer; Inclination angle is fallen space between plate and blending bin bottom inwall and is formed above-mentioned action of forced stirring layer, the axial end being positioned at action of forced stirring layer of driving shaft from top to bottom coaxially installs the agitator arm of more than a group, each agitator arm is all arranged in inclination angle and falls immediately below plate and locate, circumferentially have stator wall at least along one group of agitator arm, the inner ring surface that stator wall falls plate by inclination angle is postponed downwards and is formed;

This equipment also comprises pressure air-dissolving case, the blast pipe for passing into high-pressure blast is arranged in the casing of pressure air-dissolving case, casing arrange for the arrival end being communicated with blending bin discharging opening the pan feeding dividing plate opened and closed for realizing this arrival end, pan feeding dividing plate is fastening and be resisted against arrival end and sentence this arrival end closed with extension spring; The elastic recovery direction of extension spring and pan feeding dividing plate opposing inlet end compress direction in the same way, when being less than designated value with pressure in casing, pan feeding dividing plate can overcome extension spring restoring force, makes to form the gap flowed into for mixed liquor between pan feeding dividing plate and arrival end; The port of export of casing is communicated with flotation device, and arrange the discharge partition plate opened and closed for realizing this place at this port of export place, discharge partition plate is strained with Compress Spring and closed this port of export; The elastic recovery direction of Compress Spring and discharge partition plate opposite outlet end compress direction in the same way, Compress Spring restoring force can be overcome with discharge partition plate during the arrival of pressure in casing designated value, make between discharge partition plate and this port of export, to form the gap of flowing out for mixed liquor in casing.

The stroke diaphragm agitator for pressure in auxiliary adjustment casing is also furnished with, stirring region region place between the arrival end and the port of export of cabinets cavity of stroke diaphragm agitator in described pressure air-dissolving case; The level that comprises stroke diaphragm agitator runs through the stroke axle of casing tank wall, and drives this stroke axle work along the drive motors of the linear reciprocation action of bar length direction; Macromolecular material barrier film arranged by the rod end being positioned at casing of stroke axle; The film limit of macromolecular material barrier film is fixed in the sleeve top gone out by cabinet wall projection, the center of macromolecular material barrier film and the affixed layout of stroke shaft rod end; Described stroke diaphragm agitator is two or more and along the circumferential hoop of casing tank wall equal altitudes around uniform.

The air inlet of described blast pipe connects high pressure positive blower, air outlet in the prong like possessing multiple air outlet, and this air outlet submerges after casing feed liquor casing mixed liquor liquid level below locate; Being arranged in casing top end face and running through this top end face of blast pipe body vertical; The pressure sensor for monitoring internal pressure is also arranged in casing.

Fall at inclination angle on plate and set gradually multi-turn bank bar along mixed liquor direct of travel; In vertical, it is the concentric structure in the center of circle that each circle bank bar is formed jointly with drive axis; Often on circle bank bar, some ultrasonic waves shake plate all uniformly at intervals, the ultrasonic wave shake plate interval work on adjacent turn bank bar.

Described agitator arm is that the diameter of each group agitator arm from top to bottom increases successively along driving shaft axially lower leaf four groups of arranging; Stator wall profile presents narrow lower wealthy bell mouth shape structure, is positioned at the agitator arm of the superiors and forms rotor between this stator wall and coordinate.

Wall place, blending bin inner chamber chamber residing for action of forced stirring layer, is furnished with the stirring plate washer accelerating mixed liquor mixing efficiency; Each stirring plate washer equal plate face plumbing arrangement; The multiple stirring plate washers be distributed on the wall of blending bin chamber with the circumference of equal altitudes are one group of plate washer unit, and described plate washer unit is many groups and axially uniform successively on the wall of blending bin chamber along driving shaft.

Be furnished with the false base spacer of the horizontal tabular of one deck at the bottom face place of action of forced stirring layer, between this false base spacer and blending bin bottom face, there is fit clearance in order to sandwiched mixed cell; Mixed cell is formed along mixing direction interlaced arrangement of surging by barrier sheet; Above-mentioned fit clearance forms the unique circulation passage between action of forced stirring layer and blending bin discharging opening.

Described charging aperture and driving shaft coaxially arranged; The axial end that driving shaft is being positioned at charging aperture coaxially arranges driving turbine; Feeding pipe for the mixed liquor providing ore pulp and medicament possess the outlet nozzle of multiple level and each outlet nozzle formed with drive axis be the center of circle scroll structure; The fluid direction of each outlet nozzle is all pointed to and is driven the impeller blade of turbine to drive turbine rotation power to provide.

Feeding pipe import is communicated with pan feeding ore pulp pipe and medicament pipe simultaneously; Medicament pipe is communicated with chemical tank, and medicament pipe sets gradually diaphragm metering pump, by-pass valve control and medicament flowmeter along liquid flow direction.

Being communicated with each other with transition pipe between described blending bin discharging opening with pressure air-dissolving tank inlet end, transition pipe being arranged for providing mixed liquor with the rear pump of stable output pressure.

Beneficial effect of the present invention is:

1), be different from the single structure of sizing mixing that tradition adopts, current collection field pretreatment of the present invention, Ultrasonic Cleaning, pressure are sized mixing and efficient mechanical is sized mixing in one, and the degree of depth achieving difficult floating fine slime is sized mixing upgrading; It can play good modified effect to entering float coal mud, is particularly suitable for the upgrading of sizing mixing of difficult floating Bed for Fine Coal.

Compared with the uneven or low inferior defect of mixing efficiency of the such as mixing brought with traditional single structure of sizing mixing: on the one hand, the present invention is based on multiple tracks centralized processing operation, take full advantage of the layered shaping technique that electric field active layer, ultrasonic oscillation layer and action of forced stirring layer are formed, to arrange in pairs or groups follow-up high pressure air-dissolving box structure, final realization is relative to the efficient mixing of mixed liquor and treatment effect, and its treatment effeciency and mixing uniformity all can be significantly improved.On the other hand, in the refinement composition of each structure, electric field active layer effectively can destroy electric double layer and the hydration shell on coal slime surface, activating agent ion, makes medicament be easy at coal slime surface spreading and parcel, improves the hydrophobicity of coal grain.Ore pulp is after ultrasonic oscillation layer, and the thin mud of height ash of coal grain surface adhesion is degraded, and hydrophobic surface comes out, and gas-liquid interface tension force reduces, and hydration shell effect dies down, and the sticking probability of medicament and coal slime increases, and improves the floatability of coal slime.The formation of action of forced stirring layer then further favourable stirring space high shear environment.The effect of pressure air-dissolving case, be then that the solubility making gas in casing increases, and form water bag gaseity.When inputing to flotation device via the mixed liquor after above-mentioned pressurization, pressure reduces, and dissolved gases just can be separated out from ore pulp with the form of micro-bubble.The microvesicle that this kind of mode is separated out has that diameter is little, decentralization is high, gas-liquid interface greatly, the feature such as the preferential surface precipitation higher in hydrophobicity selectively.In addition, by import and export unique in pressure air-dissolving case design, automatically open the port of export when pressure is large in casing and close arrival end with pressure release discharge opeing; And when pressure is less than designated value in casing, automatically closes the port of export and open arrival end again to put aside pressure and to fill new mixed liquor, thus for gas during lower sub-high pressure is water-soluble and corresponding pressure discharge operations is given security.

To sum up, structure of the present invention simply and rationally, good modified effect can be played to entering float coal mud, especially the upgrading demand of sizing mixing of difficult floating Bed for Fine Coal is applicable to, its operating efficiency is high and preprocessing process is quick and convenient, very meets the high efficiency needed for current producer, the difficulty of facilitation and high mixture homogeneity selects the modernization of duff to size mixing upgrading demand.

2), pressure air-dissolving case, as one of them emphasis of the present invention, it is not only simple rely on the pressure of high-pressure blast to pour into, the respective diaphragms of arrange in pairs or groups arrival end and the port of export and spring, and that has come in casing is pressure controlled.In other words, the present invention also by adopting stroke diaphragm structure, relies on stroke diaphragm agitator, and the periodicity realized in casing is exerted pressure object.Stroke diaphragm structure herein, not traditional only as the normal usage of " guaranteeing that space, flow field is in high turbulent environment ", but utilize its change regulating effect for this volume under narrow volume, when the promotion macromolecular material barrier film of stroke axial period bloats, obviously narrow cabinets cavity volume diminishes, the gas poured into by blast pipe is forced to be pressed in mixed liquor and is filled energy to complete water bag gas, and synchronously make discharge partition plate open, complete the output function of high pressure mixing liquid thereupon.Stroke axial period retraction and when pulling macromolecular material barrier film to bounce back, now cabinets cavity volume increases, relative cabinets cavity pressure reduces, while mixed liquor continues to pour into by arrival end, the mutual married operation of the air that synchronous adjoint and blast pipe exports, thinking that above-mentioned water bag gas fills step can provide precondition.By above-mentioned steps, can synchronously produce a large amount of microvesicle when mixed liquor enters flotation device release of pressure, finally create good conditions for follow-up floatation process.

3) even if, consider and carry out voltage supply and release of pressure of exerting pressure in periodic casing, also need certain monitor component to carry out corresponding monitoring, the present invention by arrange pressure sensor to complete above-mentioned functions.The blast pipe outlet of forked distribution, is conducive to uniformly dispersed along above-mentioned outlet air-out of high-pressure blast, with further evenly enter in low pressure mixed liquor, and complete gas-liquid mixed step when casing inner high voltage.

4), inclination angle falls the design of multi-turn bank bar on plate, ensure that large or fine granule is when advancing along bank bar, possesses different rolling durations, and then makes thick, fine grained be present in different ultrasonic oscillation scavenging periods.Coarse granule because of its particle comparatively large, relatively slow along bank bar gait of march, therefore long by the ul-trasonic irradiation time, otherwise and fine grained is subject to the ul-trasonic irradiation time short.The adjacent turn ultrasonic wave shake plate of spacing movement, then making each ultrasonic wave shake plate all has the corresponding pause finishing time, to extend the life-span of ultrasonic wave shake plate.

5) stator wall, by installing in the surrounding of agitator arm, thus the collisional mixing operation being conducive to material.On the one hand, the horn mouth profile of the lower expansion shape of the uniqueness of stator wall, the liquid flow point served to a certain degree falls apart object, and mixed liquor, via in stator wall undershoot process, can be able to enter action of forced stirring layer with disperse state rapidly, to promote its stirring and mixing effect.On the other hand, multiple layers of stirring blades wheel system, ensure that height turbulent flow and the action of forced stirring mixing object of mixed liquor, the plate washer unit of arranging in pairs or groups follow-up, its stirring efficiency and mixed effect all can be greatly improved.

6), stirring space the false base spacer of bottom design and between the two sandwiched mixed cell is installed, mixed material mixed cell cube repeated segmentation and changed course also form eddy current.By this mixed cell, on the one hand rectification ore pulp, what in transportation, increase mineral and medicament on the other hand mixes collision probability, with the last mixed effect further promoting mixed liquor.

7), drive turbine, the outlet nozzle of collocation scroll structure, constitutes scroll multiinjector jetting flow structure of the present invention.Medicament is delivered to by diaphragm metering pump accurate measurement " larynx neck tube " on feeding pipe, and this design can allow medicament and ore pulp Homogeneous phase mixing.The outlet nozzle injection ore pulp of scroll drives turbine to impact from surrounding, drives turbine to rotate, and then drives four layers of shaft coupling tower-like agitator arm to rotate.Each outlet nozzle forms an entirety, so that Installation and adjustment flow angle, posts high-abrasive material, extend service life in each nozzle.Drive turbine to drive four layers of tower-like agitator arm to rotate, dexterously the impact energy of mixed liquor is converted into the mechanical energy of driving shaft especially, rational in infrastructure and entirety is more energy-saving and cost-reducing.The mixed liquor that kinetic energy obviously reduces enters at a slow speed electric field active layer, also ensure that and is unlikely to produce each parts of electric field active layer because kinetic energy is excessive to impact or too fastly to flow through, to ensure its electric field activation effect, and the service life of Synchronous lifting corresponding component.

8), the setting of rear pump, the Characteristic fluctuation avoiding blending bin fluid pressure to the impact effect of follow-up pressure air-dissolving case, further to ensure the stability of liquid supply pressure in pressure air-dissolving case.

Accompanying drawing explanation

Fig. 1 is structural representation of the present invention;

Fig. 2 is the duty schematic top plan view driving turbine;

Fig. 3 is the plate face structure elevational schematic view of upper electrode plate;

Fig. 4 is the plate face schematic top plan view that plate is fallen at inclination angle;

Fig. 5 is the circumferentially schematic diagram of plate washer unit along blending bin tank wall.

Illustrate each structure and component names corresponding relation of the present invention is as follows:

10-blending bin 20-driving shaft 31-lower electrode plate 32-upper electrode plate

40-falls at inclination angle plate 41-stator wall 42-bank bar

50-ultrasonic wave shake plate 60-agitator arm 70-casing

71-pan feeding dividing plate 72-extension spring 73-discharge partition plate 74-Compress Spring

75-stroke diaphragm agitator 75a-stroke axle 75b-drive motors

75c-macromolecular material barrier film 75d-sleeve 76-blast pipe

80-pressure sensor 90-stirs plate washer 100-false base spacer 110-barrier sheet

120-drives turbine 130-feeding pipe 140-chemical tank

150-diaphragm metering pump 160-by-pass valve control 170-medicament flowmeter

180-transition pipe 190-rear pump

Detailed description of the invention

For ease of understanding, composition graphs 1-5 herein, does following further describing to specific embodiments of the invention:

1.1 critical piece introductions

(1) blending bin

The design of blending bin 10 takes into full account evenly feeding and tentatively mixing of pan feeding ore pulp, all has identical contact mixing probability to reach each fraction pulp and medicament, thus final formation possesses the mixed liquor of high mixture homogeneity.Blending bin 10 can be cylindric or hexahedron shape, certainly also can be other profiles, is cylindric blending bin 10 as shown in Figure 1.The mixed structure possessing different mixed function of some layers is arranged, to form runner layering combination construction from top to bottom in blending bin 10.Each layer mixed structure mainly comprises: the ground floor electric field active layer be made up of upper electrode plate 32 and lower electrode plate 31, fall plate 40 and ultrasonic wave by inclination angle and shake the second layer ultrasonic oscillation layer that plate 50 forms, the third layer action of forced stirring layer coordinating plate washer unit to form by agitator arm 60, each interlayer coordinated each other, to realize corresponding mixed function.

(2) scroll multiinjector jetting flow system

Namely the scroll multiinjector jetting flow system at this place, be also arranged in the feed system at blending bin 10 charging aperture place.Medicament, by after diaphragm metering pump 150 accurate measurement, is delivered to " the larynx neck tube " on feeding pipe 130, also i.e. Buddhist monk's tubular construction place shown in Fig. 1, and this design can allow medicament and ore pulp Homogeneous phase mixing.Through as shown in Figure 3 scroll export structure, tentatively mix rear ore pulp with medicament and can impact from surrounding the driving turbine 120 be positioned at driving shaft 20, thus drive this driving turbine 120 to rotate, and then the agitator arm 60 being positioned at action of forced stirring layer place is driven to produce rotational action.Feeding pipe 130 is an entirety together with each outlet nozzle being positioned at exit, so that Installation and adjustment flow angle.High-abrasive material can be posted, to extend its service life in outlet nozzle.Turbine 120 is driven to drive the agitator arm 60 of four layers of tower-like layout to rotate, thus the energy of the impinging jet of liquid is converted in action of forced stirring layer stirs required mechanical energy dexterously, it is rational in infrastructure and energy-saving and cost-reducing, the ore pulp that kinetic energy obviously reduces enters electric field active layer by the charging aperture of blending bin 10, and can carry out every follow-up pretreatment successively.

(2) electric field active layer

Namely electric field active layer is made up of the cathode circuit plate (also upper electrode plate 32) of upper, annular and lower annular cathode traces plate (being also lower electrode plate 31).Cathode circuit plate and cathode traces plate are all arranged in the high molecular abrasion-proof plate of waterproof, form an electric field action region from top to down.Cathode circuit plate profile structure in the form of annular discs, specifically as shown in Figure 3, cathode traces plate structure in like manner.Cathode traces plate is directly attached at the roof place of blending bin 10 when installing, and cathode circuit plate or can refer to and be anchored on blending bin 10 tank wall place with radiation beam shown in Fig. 1, or in addition affixed with overhung construction etc., and should not be directly fixed on driving shaft 20 and increase the weight of its running burden.The layout of this electric field active layer, effectively can reach and destroy the electric double layer on coal slime surface and the object of hydration shell, thus activating agent ion, make medicament be easy at coal slime surface spreading and parcel, be finally conducive to the hydrophobicity improving coal grain.

(3) ultrasonic oscillation layer

Ultrasonic oscillation layer specifically shakes plate 50 by supersonic generator, ultrasonic transducer, PLC control system and 4 ~ 6 circle ultrasonic waves and formed.Ultrasonic wave shake plate 50 is arranged on and falls on the bank bar 42 of plate 40 and ring uplift along inclination angle.The bank bar 42 of protuberance, ensure that the mobile obstacle effect for coal slime.Fine grained coal slime is due to own wt, relatively more " light " stride across bank bar 42 and Fast marching, coarse granule coal slime is then relatively sunk and is more difficult to stride across bank bar 42, thus also, fine grained thick with regard to utilization cleverly falls the different time of staying on plate 40 at inclination angle, and make to possess the different ul-trasonic irradiation time.For being more conducive to understand, in Fig. 1 and Fig. 4, we are divided into odd number circle (first lap and the 3rd circle) and even number circle (the second circle and the 4th encloses) at the plate 50 that shaken by ultrasonic wave from outside to inside.Be interrupted alternation by odd number circle and even number circle, each working time, at 20 minutes, is controlled by PLC system, thus extends the service life of each circle place ultrasonic wave shake plate 50 by its alternation.Ore pulp is after ultrasonic oscillation layer, and the thin mud of height ash of coal grain surface adhesion is degraded, and hydrophobic surface comes out; Gas-liquid interface tension force reduces, and hydration shell effect dies down, and the sticking probability of medicament and coal slime increases, thus further improves the floatability of coal slime.

(4) action of forced stirring layer

The agitator arm 60 of four layers of tower-like layout unique in Fig. 1, constitutes the agent structure of action of forced stirring layer; Plate washer unit in collocation Fig. 5, the height turbulent flow finally realized in action of forced stirring layer stirs environment.The design of action of forced stirring layer takes into full account the flow location form of ore pulp, and the mixed liquor after the process of above-mentioned ultrasonic oscillation layer is pooled to center discharging opening, enters action of forced stirring layer.The surrounding of ground floor agitator arm is provided with stator wall 41, is conducive to the collisional mixing of material, is provided with stirs plate washer 90, to realize high shear environment at tank wall.At the bottom design of the action of forced stirring layer double-deck false end, the formation of favourable stirring space high shear environment; Install mixed cell, the mixed cell cube repeated segmentation of mixed material and changed course also form eddy current, reach and efficiently mix object at double-deck false the end.

(5) pressure air-dissolving case

The medicament mixed and ore pulp by transport pump in pressure air-dissolving case.Pressure air-dissolving case comprises casing 70, arranges and form the parts such as blast pipe 76 and corresponding stroke diaphragm agitator 75 by high-pressure blast system and a point pressure pipe in casing 70.High-pressure blast system is connected with the top of casing 70.Also be designed with pressure sensor 80 on the top of casing 70, PLC control system is according to the open degree of the value dynamic adjustments blast pipe 76 place valve of pressure sensor 80.Divide pressure pipe to insert the certain degree of depth of ore pulp, be conducive to air dissolves in ore pulp.The arrival end of casing 70 and the port of export are made up of elastomeric material and respective diaphragms.Arrival end arranges pan feeding dividing plate 71 and extension spring 72 of arranging in pairs or groups, and the port of export arranges discharge partition plate 73 and Compress Spring 74 of arranging in pairs or groups.When the macromolecular material barrier film 75c of stroke diaphragm agitator 75 heaves, pressure increase in casing 70, the back-moving spring 72 at arrival end place shrinks under pressure in elastic force and casing 70, and arrival end is closed, and the gas existed in casing 70 is under high pressure pressed in mixed liquor; The Compress Spring 74 at corresponding port of export place is pressed, and the port of export is opened, and the mixed liquor under pressurized water bag gaseity is transported to floatation equipment.When the macromolecular material barrier film 75c of stroke diaphragm agitator 75 shrinks, in casing 70, pressure reduces, back-moving spring 72 jack-up at arrival end place, and arrival end is opened; The Compress Spring 74 of the port of export is replied and is made discharge partition plate 73 again push against the port of export, and the port of export is closed, and mixed liquor continues to be imported in pressure air-dissolving case via blending bin 10, repeats the operation of above-mentioned pressure air-dissolving.

Because of the unique job state of pressure air-dissolving case, the gas exported by pressure air-dissolving case presents the water bag gaseity of high pressure.When the mixed liquor of the water bag gas of this high pressure inputs to flotation device, due to the reduction of environmental pressure, the inner dissolved gases of mixed liquor just can be separated out with the form of micro-bubble fast.Because of the microvesicle of separating out after aforesaid way process have that diameter is little, decentralization is high, gas-liquid interface greatly, the feature such as the preferential surface precipitation higher in hydrophobicity selectively, be obviously very advantageous in high-speeding and the high efficiency operation of follow-up flotation processing procedure.

Claims (10)

1. integrated form difficulty selects a duff size mixing equipment, it is characterized in that: this equipment at least comprises blending bin (10), and charging aperture is positioned at the top end face place of blending bin (10) and discharging opening is positioned at blending bin (10) bottom end; Blending bin (10) inner chamber plumbing arrangement driving shaft (20), blending bin (10) inner chamber from top to bottom arranges electric field active layer, ultrasonic oscillation layer and action of forced stirring layer successively along driving shaft (20) length direction; Lower electrode plate (31) is horizontally disposed with in blending bin (10), the top wall level of blending bin (10) arranges upper electrode plate (32), and two battery lead plate polarity form above-mentioned electric field active layer with region between relatively; Arrange inclination angle in lower electrode plate (31) below and fall plate (40), inclination angle is fallen space between plate (40) and lower electrode plate (31) and is formed ultrasonic oscillation layer; Inclination angle is fallen plate (40) profile and is constructed in the bell mouth shape extended to driving shaft (20) axis direction declivity by blending bin (10) inwall, and upper ultrasonic wave shake plate (50) arranged for ultrasonic oscillation of plate (40) is fallen at inclination angle; Ultrasonic oscillation layer entrance point is communicated with the port of export of electric field active layer and is positioned at the high-end place that plate (40) is fallen at inclination angle, the gap having between plate (40) low side and driving shaft (20) and fall for mixed liquor is fallen at inclination angle, and this gap forms the port of export of ultrasonic oscillation layer; Inclination angle is fallen space between plate (40) and blending bin (10) bottom inwall and is formed above-mentioned action of forced stirring layer, the axial end being positioned at action of forced stirring layer of driving shaft (20) from top to bottom coaxially installs the agitator arm (60) of more than a group, each agitator arm (60) is all arranged in inclination angle and falls place immediately below plate (40), circumferentially have stator wall (41) at least along one group of agitator arm, the inner ring surface that stator wall (41) falls plate (40) by inclination angle is postponed downwards and is formed;

This equipment also comprises pressure air-dissolving case, the blast pipe (76) for passing into high-pressure blast is arranged in the casing (70) of pressure air-dissolving case, casing (70) arrange for the arrival end being communicated with blending bin (10) discharging opening the pan feeding dividing plate (71) opened and closed for realizing this arrival end, pan feeding dividing plate (71) is fastening and be resisted against arrival end and sentence this arrival end closed with extension spring (72); The elastic recovery direction of extension spring (72) and pan feeding dividing plate (71) opposing inlet end compress direction in the same way, when being less than designated value with pressure in casing (70), pan feeding dividing plate can overcome extension spring (72) restoring force, makes to form the gap flowed into for mixed liquor between pan feeding dividing plate (71) and arrival end; The port of export of casing (70) is communicated with flotation device, and arrange the discharge partition plate (73) opened and closed for realizing this place at this port of export place, discharge partition plate (73) is strained with Compress Spring (74) and closed this port of export; The elastic recovery direction of Compress Spring (74) and discharge partition plate (73) opposite outlet end compress direction in the same way, Compress Spring (74) restoring force can be overcome with discharge partition plate during the arrival of pressure in casing (70) designated value, make between discharge partition plate (73) and this port of export, to form the gap of flowing out for casing (70) interior mixed liquor.

2. a kind of integrated form difficulty according to claim 1 selects duff size mixing equipment, it is characterized in that: be also furnished with the stroke diaphragm agitator (75) for auxiliary adjustment casing (70) interior pressure in described pressure air-dissolving case, the stirring region of stroke diaphragm agitator (75) is positioned at region place between the arrival end of casing (70) inner chamber and the port of export; The level that comprises stroke diaphragm agitator (75) runs through the stroke axle (75a) of casing tank wall, and drives this stroke axle (75a) work along the drive motors (75b) of the linear reciprocation action of bar length direction; Macromolecular material barrier film (75c) arranged by the rod end being positioned at casing (70) of stroke axle (75a); The film limit of macromolecular material barrier film (75c) is fixed in sleeve (75d) top gone out by casing (70) inwall projection, the center of macromolecular material barrier film (75c) and the affixed layout of stroke axle (75a) rod end; Described stroke diaphragm agitator (75) is for two or more and along the circumferential hoop of casing (70) tank wall equal altitudes around uniform.

3. a kind of integrated form difficulty according to claim 3 selects duff size mixing equipment, it is characterized in that: the air inlet of described blast pipe (76) connects high pressure positive blower, air outlet in the prong like possessing multiple air outlet, and this air outlet submerges after casing (70) feed liquor casing (70) mixed liquor liquid level below locate; Being arranged in casing (70) top end face and running through this top end face of blast pipe (76) body vertical; The pressure sensor (80) for monitoring internal pressure is also arranged in casing (70).

4. a kind of integrated form difficulty according to claim 1 or 2 or 3 selects duff size mixing equipment, it is characterized in that: fall at inclination angle on plate (40) and set gradually multi-turn bank bar (42) along mixed liquor direct of travel; In vertical, it is the concentric structure in the center of circle that each circle bank bar (42) is formed jointly with driving shaft (20) axis; Often on circle bank bar (42), some ultrasonic waves shake plate (50) all uniformly at intervals, ultrasonic wave shake plate (50) the interval work on adjacent turn bank bar (42).

5. a kind of integrated form difficulty according to claim 1 or 2 or 3 selects duff size mixing equipment, it is characterized in that: described agitator arm (60) is that the diameter of each group agitator arm from top to bottom increases successively along driving shaft (20) axially lower leaf four groups of arranging; Stator wall (41) profile presents narrow lower wealthy bell mouth shape structure, is positioned at the agitator arm (60) of the superiors and forms rotor between this stator wall (41) and coordinate.

6. a kind of integrated form difficulty according to claim 5 selects duff size mixing equipment, it is characterized in that: wall place, blending bin (10) inner chamber chamber residing for action of forced stirring layer, is furnished with the stirring plate washer (90) accelerating mixed liquor mixing efficiency; Each stirring plate washer (90) is plate face plumbing arrangement all; Be one group of plate washer unit with multiple stirring plate washers (90) that the circumference of equal altitudes is distributed on the wall of blending bin (10) chamber, described plate washer unit is many groups and axially uniform successively on the wall of blending bin (10) chamber along driving shaft (20).

7. a kind of integrated form difficulty according to claim 5 selects duff size mixing equipment, it is characterized in that: the false base spacer (100) being furnished with the horizontal tabular of one deck at the bottom face place of action of forced stirring layer, between this false base spacer (100) and blending bin (10) bottom face, there is fit clearance in order to sandwiched mixed cell; Mixed cell is formed along mixing direction interlaced arrangement of surging by barrier sheet (110); Above-mentioned fit clearance forms the unique circulation passage between action of forced stirring layer and blending bin (10) discharging opening.

8. a kind of integrated form difficulty according to claim 1 or 2 or 3 selects duff size mixing equipment, it is characterized in that: described charging aperture and driving shaft (20) coaxially arranged; Driving shaft (20) coaxially arranges in the axial end being positioned at charging aperture and drives turbine (120); The outlet nozzle possessing multiple level for providing the feeding pipe of the mixed liquor of ore pulp and medicament (130) and each outlet nozzle formed with driving shaft (20) axis be the center of circle scroll structure; The fluid direction of each outlet nozzle is all pointed to and is driven the impeller blade of turbine (120) to drive turbine (120) rotational power to provide.

9. a kind of integrated form difficulty according to claim 8 selects duff size mixing equipment, it is characterized in that: feeding pipe (130) import is communicated with pan feeding ore pulp pipe and medicament pipe simultaneously; Medicament pipe is communicated with chemical tank (140), and medicament pipe sets gradually diaphragm metering pump (150), by-pass valve control (160) and medicament flowmeter (170) along liquid flow direction.

10. a kind of integrated form difficulty according to claim 1 or 2 or 3 selects duff size mixing equipment, it is characterized in that: be communicated with each other with transition pipe (180) between described blending bin (10) discharging opening with pressure air-dissolving tank inlet end, transition pipe (180) is upper to be arranged for providing mixed liquor with the rear pump of stable output pressure (190).