CN105289389A - Equipment of deeply slurry mixing and modifying for coal slime - Google Patents
Equipment of deeply slurry mixing and modifying for coal slime Download PDFInfo
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- CN105289389A CN105289389A CN201510862721.8A CN201510862721A CN105289389A CN 105289389 A CN105289389 A CN 105289389A CN 201510862721 A CN201510862721 A CN 201510862721A CN 105289389 A CN105289389 A CN 105289389A
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Abstract
The invention relates to the field of coal slurry pretreatment, in particular to equipment of deeply slurry mixing and modifying of coal slime for slurry mixing and modifying of high-ash fine coal slime difficult to float. The equipment comprises a mixing box; agentia dispersion tanks are arranged at the top of a chamber of the mixing box, and an annular dispersion unit and an annular ore pulp feed chutes are arranged at the outside of the agentia dispersion tanks in sequence; a fallplate with a dip angle is arranged below a discharge port of the annular dispersion unit; vane wheels are arranged below the fallplate with the dip angle, and stator walls encircle the vane wheels; a liquid outlet of the mixing box is formed in bottom end surface of the mixing box; double row side-by-side nozzles with dispersed jet flows for providing agentia mixed liquor to the agentia dispersion tanks are arranged at the top end surface of the mixing box; two agentia dispersion tanks are arranged in parallel along the tank direction; diffusers of each nozzle with the dispersed jet flow extents into chambers of corresponding agentia dispersion tank. The equipment can play a very good role in modifying of floated coal slime and is particularly suitable for the demand of slurry mixing and modifying of fine coal difficult to float, the work efficiency of the equipment is high and a treatment process is rapid and convenient.
Description
Technical field
The present invention relates to coal slurry preprocessing technical field, be specifically related to select fine slime to size mixing to size mixing with a kind of coal slime degree of depth of upgrading upgrading facility for the grey difficulty of height.
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 stator blade wheel blender, mechanically disperse, because the linear velocity of impeller 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 reasonably the coal slime degree of depth to size mixing upgrading facility, can play good modified effect to entering float coal mud, being especially 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 coal slime degree of depth is sized mixing upgrading facility, it is characterized in that: comprise blending bin and be arranged at the stepped mixing system in blending bin; The cavity top place of blending bin arranges medicament dispersion slot, the ore pulp feed chute of annular dispersal unit and ring-type is set gradually outside medicament dispersion slot, the external groove sidevall of described ore pulp feed chute is the tank wall of blending bin and madial wall forms overflow wall, enters the annular dispersal unit possessing shear-mixed function after the medicament mixed liquor that the ore pulp overflowed and medicament dispersion slot place overflow mixes; Plate is fallen at the discharging opening arranged beneath inclination angle of annular dispersal unit; Plumbing arrangement driving shaft in blending bin, it is that the bell mouth shape upwarping extension to drive axis by blending bin tank wall constructs that plate is fallen at inclination angle, fall at inclination angle on plate and set gradually many bank bars along mixed liquor direct of travel, the gap having between plate and driving shaft and fall for mixed liquor is fallen at inclination angle; Driving shaft is also coaxially installed with impeller, and impeller is arranged in inclination angle and falls below plate and locate, and wound impeller is furnished with stator wall, and the inner ring surface that stator wall falls plate by inclination angle is postponed downwards and formed; The liquid outlet of blending bin is positioned at its bottom face place;
Blending bin top end face is arranged for providing medicament dispersion slot with the spray dispersion shower nozzle of the double block form of medicament mixed liquor, and spray dispersion shower nozzle comprises the body possessing hollow tube chamber, and described body is Venturi tube; The entrance of body is communicated with outside ore pulp pipeline, and the contraction section of body or venturi are communicated with outside medicament pipeline, and the diffuser of body forms mixture export pipe; Arrange that nozzle blade forms separate chamber to make entrance at the entrance end of body hollow tube chamber, nozzle blade arranges nozzle and the charging aperture of this nozzle is communicated with chamber residing for entrance and discharge end is communicated with chamber residing for contraction section; The side plate face place being positioned at chamber residing for entrance of nozzle blade arranges guide vane, and described each guide vane profile is the arc sheet of cambered surface parallel nozzle axis and entirety line centered by body axis is scroll layout; Nozzle is the side place, close body axis place being arranged in corresponding guide vane along body axis around uniform multiple and each nozzle one to one; Diffuser is the forked structure of tube body along the distribution of body axis circumference, and each bifurcated of this forked structure of tube body all forms one section of mixture export pipe; Medicament dispersion slot be each other groove to two that are arranged in parallel; The diffuser of each spray dispersion shower nozzle probes in the vallecular cavity of corresponding medicament dispersion slot.
The charging aperture of described nozzle is circular hole, the close side, pipe body lumen wall place of guide vane and this chamber wall of body affixed, guide vane extends curved extended surface and the nozzle formed dead in line near side, body axis place is arranged; The diffuser of body is interior is that scroll is furnished with mixing catch along body axis.
Stator wall possesses the hypomere of upper narrow lower wealthy bell mouth shape epimere and straight cylindrical structure, and between the bottom external diameter of hypomere external diameter and epimere, equal diameter is arranged; The described impeller be positioned on driving shaft is at least coaxially arranged two-layer, and upper strata impeller diameter is less than lower floor's impeller diameter and upper strata impeller is positioned at epimere and lower floor's impeller is positioned at hypomere, and two-layer impeller forms the layer impeller structure coordinated with stator wall jointly.
Along drive axis direction, arranging multiplayer action of forced stirring chamber from top to bottom in the blending bin cavity space that below plate is fallen at inclination angle, often organizes action of forced stirring chamber and comprises one group of layer impeller structure respectively; The liquid outlet in action of forced stirring chamber is all positioned at its bottom face place, and the stator wall in every one deck action of forced stirring chamber and impeller fit clearance all form its inlet; All pad at the bottom face place often organizing action of forced stirring chamber and be provided with the flat false base spacer of one deck, and there is fit clearance in order to sandwiched mixed cell in both; Mixed cell and annular dispersal unit form along mixed liquor flow direction interlaced arrangement by catch.
The wall place, chamber in each layer action of forced stirring chamber all arranges stroke diaphragm agitator; Described stroke diaphragm agitator comprises the stroke axle running through blending bin tank wall along driving shaft radial direction, and drives this stroke axle work along the drive motors of the linear reciprocation action of bar length direction, and macromolecular material barrier film arranged by the rod end being positioned at blending bin inner chamber of stroke axle; The film limit of macromolecular material barrier film is fixed in the sleeve top gone out by the inwall projection of blending bin, the center of macromolecular material barrier film and the affixed layout of stroke shaft rod end.
The stroke diaphragm agitator at each layer action of forced stirring chamber place be four and the circumferential hoop along blending bin tank wall of equal altitudes around uniform.
The top cover of the ore pulp feed chute of described annular is provided with the cover plate of annular, and cover plate runs through plate body and arrange overfall, each overfall is uniform successively along the circumferential direction of cover plate.
Two groove ends of described medicament dispersion slot and relatively all constructing in sealing surface near a cell wall of annular dispersal unit, and this sealing surface is textural arranges the fluid hole being communicated with vallecular cavity; Between this sealing surface structure and annular dispersal unit, arrange transition overflow launder, the spillwag chute of described transition overflow launder and the inner ring surface coplanar of annular dispersal unit are arranged.
Extended on the medicament pipeline of spray dispersion shower nozzle by chemical tank, and for supply jet distribution showerhead with the ore pulp pipeline of ore pulp, all set gradually by-pass valve control and flowmeter along liquid flow direction.
The liquid outlet profile of described blending bin is straight cylindrical structure, in its liquid outlet, arrange mixed cell equally.
Beneficial effect of the present invention is:
1), combined type mode of sizing mixing will be following main developing direction, and the present invention collects spray dispersion and pipeline mixing, falls plate mixing, high shear dispersed with stirring is mixed in one, and the efficient degree of depth achieving coal slime is sized mixing upgrading function.Wherein, relative to current traditional nozzle structure, spray dispersion shower nozzle of the present invention is by adopting multiinjector structure, the guide vane that collocation is arranged at above nozzle feeding mouth, and guide vane number is identical with nozzle number, thus ore pulp can be impelled with the ejection of rotating jet form, the efficient shearing of the quick formation and medicament that are finally conducive to jet chamber's negative pressuren zone sucks.The diffuser openings of venturi end adopts the forked structure of duct, not only makes the flow velocity of the unit mixture export pipe of each crotch faster, is conducive to forming high shear environment; Simultaneously also can a multiplex uniform discharge demand realized in certain limit.This nozzle structure is succinctly reasonable, the Homogeneous phase mixing fuel requirements realizing medicament, ore pulp and even clear water that can be efficient and controlled.
The medicament mixed liquor sprayed by spray dispersion shower nozzle, in medicament dispersion slot after preliminary mixing, synchronously falls in annular dispersal unit with the ore pulp overflowed in ore pulp feed chute.After being subject to annular dispersal unit shear-mixed, mixed liquor drops to inclination angle and falls on plate.Several groups of bank bars that plate designs are fallen by inclination angle, low ash content coarse granule is close to skateboarding and is subject to the stop of bank bar, and movement velocity is slow, and pretreatment time is long, impel its surface energy to adhere to enough and stable oil film, after entering flotation device, bubble floating can be adhered to quickly.And high-ash thin mud is owing to being worth without flotation, without the need to too much participating in stick operation, therefore can enter faster in next stage hybrid system.Its structure can while the coarse grained medicament parcel of the high ash content of guarantee and mix uniformly effect, optionally reduce the pretreatment time of the thin mud of high ash content, avoid the flotation agent that its adsorption is too much, their flotation speed is just slow down in follow-up flotation device, not only serve and farthest alleviate the thin mud of high ash to the effect of the pollution of floatation clean coal, to promote its operating efficiency, also greatly reduce the actual input amount of flotation agent, to be conducive to controlling its pretreatment cost simultaneously.
Impeller and stator wall form combined impeller, its integral installation in the center of blending bin, with the dish coaxial rotation that hazes.Material falls the top that plate most significant end flow into combined impeller from inclination angle, under the action of forced stirring effect of combined impeller, realize the collisional mixing of medicament and mineral further.By the stator wall installed in the surrounding of impeller, coordinate the mixture export pipe of the body of from bottom to top feed, be conducive to the collisional mixing of material.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.
To sum up state, the present invention is the novel size mixing equipment integrating multiple function of sizing mixing, and can play good modified effect to entering float coal mud, and be especially 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.
2), practical operation time, the arrangement of guide vane is of the present invention one large emphasis.By by guide vane by pipe body lumen wall place, until extend to the charging aperture place of the nozzle coordinated with it, thus realize for the high-efficiency guide object of ore pulp pipeline place liquid.Ore pulp pipeline place liquid, along in guide vane traveling process, is constantly accelerated, and after directly guiding to nozzle place, is incident upon jet chamber in rotating jet mode by nozzle, the final efficient shearing suction driving medicament.The layout of mixing catch, further can realize the online just mixed effect of the relative mixed liquor of whole fluid jet nozzle, just repeat no more herein.
3), the formation of layer impeller structure is also one of them emphasis of the present invention.On the one hand.The horn mouth profile of the lower expansion shape of the uniqueness of stator wall, serves liquid stream dispersion effect to a certain degree, and mixed liquor, via in stator wall undershoot process, can be able to enter between impeller liquid level with disperse state rapidly, to promote its stirring and mixing effect.On the other hand, layer impeller system, ensure that the efficient and compulsory mixing object of mixed liquor, the equipment such as the stroke diaphragm agitator of arranging in pairs or groups follow-up, its stirring efficiency and mixed effect all can be greatly improved.
4), at blending bin tank wall stroke diaphragm agitator circumferentially, drive motors can move back and forth in certain stroke distances with dynamic stroke axle, thus drives macromolecular material barrier film back and forth movement.This structure can guarantee that the space, flow field of blending bin tank wall surrounding is in high turbulent environment, avoids the flow field environment of " center high shear, the low turbulent flow of surrounding ", is conducive to the modified effect of successively sizing mixing playing whole action of forced stirring chamber.
5), by the overflow groove structure of ore pulp feed chute, ensure that the uniformity of charging, rely on the enter material way adopting annular pan feeding, inner side overflow, to maintain discharging flow stabilizes, form certain discharge height, ore pulp can overflow ore pulp feed chute slowly and fully mix with medicament at annular dispersal unit place all the time simultaneously.Above ore pulp feed chute, be provided with cover plate, it is also overfall that cover plate has some ore pulp discharging openings, further to promote the even flushing effect of ore pulp along ore pulp feed chute.
6), during concrete operations, the medicament mixed liquor sprayed by each forked mixture export pipe of spray dispersion shower nozzle, preliminary mixing in medicament dispersion slot after reduction of speed, flow into secondary reduction of speed in transition overflow launder via fluid hole and mix, thus can with mix more all even flow velocity more slowly mode flow in annular dispersal unit, be mixed with each other with the ore pulp flowed out with the overfall place of ore pulp feed chute.Via above-mentioned steps, self blend step collocation later stage of medicament mixed liquor mixes with the secondary between ore pulp, and its mixing efficiency is higher, and the uniformity of mixing also can effectively be ensured.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is position relationship top view between ore pulp feed chute, medicament dispersion slot and annular dispersion dispersal unit;
Fig. 3 is the structural representation of spray dispersion shower nozzle;
Fig. 4 is the structure section schematic diagram at the diffuser place of spray dispersion shower nozzle;
Fig. 5 is the position figure between the nozzle of spray dispersion shower nozzle and guide vane.
Illustrate each structure and component names corresponding relation of the present invention is as follows:
10-spray dispersion shower nozzle
10a-entrance 10b-contraction section 10c-venturi 10d-diffuser
11-nozzle blade 12-nozzle 13-guide vane 14-mixing catch
20-blending bin 30-medicament dispersion slot 31-fluid hole 32-transition overflow launder
40-annular dispersal unit 50-ore pulp feed chute 51-cover plate 52-overfall
60-falls at inclination angle plate 61-bank bar 70-driving shaft 71-impeller 72-stator wall
80-false base spacer 90-mixed cell
101-stroke axle 102-drive motors 103-macromolecular material barrier film 104-sleeve
110-chemical tank 120-by-pass valve control 130-flowmeter
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 20 takes into full account evenly feeding of pan feeding ore pulp, has identical contact mixing probability to reach each fraction pulp and medicament.
Blending bin 20 can be cylindric or hexahedron shape, certainly also can be other profiles, is cylindric blending bin casing as shown in Figure 1-2.And as shown in Figure 2, ore pulp feed chute 50 and medicament dispersion slot 30 are fixed by the tank wall place, top of blending bin 20.Dilution water feeding mouth is arranged in ore pulp feed chute 50 both sides, is conducive to regulating pulp density rapidly and uniformly.For ensureing surrounding even overflow, be provided with cover plate 51 above ore pulp feed chute 50, namely cover plate 51 has some ore pulp discharging openings is also 8 in overfall 52, Fig. 2, also can be able to adjust according to instrument size number of aperture.The medicament mixed liquor that medicament dispersion slot 30 sprays in order to buffer accepts spray dispersion shower nozzle 10, and make medicament mixed liquor to enter in annular dispersal unit 40 after transition overflow launder 32 secondary buffer, to enter annular dispersal unit 40 together with the ore pulp that ore pulp feed chute 50 place overflows, realize its mixed function.
(2) jet medicament decentralized system
The core of jet medicament decentralized system is the spray dispersion shower nozzle 10 shown in Fig. 3-5.Compared with conventional fluidic device, spray dispersion shower nozzle 10 adopts forked culvert type anemostat structure, four nozzles or more the nozzle and design guide vane 13 above nozzle 12 pan feeding of arranging in pairs or groups, thus is more conducive to emulsification and the dispersion of medicament.
Multi-jet advantage is to penetrate a plurality of fluids, and the surface area of fluid-phase contact is larger, is more conducive to the generation of medicament emulsion.Sidewall above nozzle 12 feeding mouth is as shown in Figure 1 designed with guide vane 13, and guide vane number is identical with nozzle number, can effectively impel ore pulp with the ejection of rotating jet form, thus the shearing of the formation and medicament that are conducive to jet chamber's negative pressuren zone sucks.
The Cross section Design of diffuser 10d is culvert type as shown in Figure 2, thus mixed liquor cutting can be dispersed into multiply rotating jet, is conducive to forming high shear environment, to reach its efficient shear-mixed effect.
The medicament of spray dispersion shower nozzle 10 and ore pulp supply, rely on the medicament pipeline of ore pulp pipeline and connection chemical tank 110 to realize.Wherein: on medicament pipeline and ore pulp pipeline, arrange flowmeter 130, to realize traffic monitoring in use procedure and calibration function.By-pass valve control 120 opens and closes respective line in order to folding.
(3) mixed cell
The flow direction of this equipment according to ore pulp and the spatial arrangement structure of equipment, ingeniously reasonably devise mixed structure, it had both achieved fully mixing of medicament and ore pulp, played again the effect of stablizing whole pretreatment space fluid motion morphology, fluid is moved and meets the best flow location form of sizing mixing.Wherein, the ore pulp after dilution and medicament can flow into annular dispersal unit 40 after disperseing emulsion to converge above annular dispersal unit 40 together.On the one hand, annular dispersal unit 40 to be intersected by predetermined angular by the catch of some and is formed, and material is through annular dispersal unit 40 repeated segmentation and changed course and form eddy current, reaches mixing object.In addition, the annular cutting channel of annular dispersal unit 40, impels material to enter subsequent processing with best fluidised form, thus avoids material to fall the direct impact of plate 60 to inclination angle.
And other each mixed cells 90 in Fig. 1, equally for realizing the mixing of medicament and ore pulp and ensureing longer pretreatment time, to reach the decentralization of raising material and to guarantee mixed uniformly object.
(4) plate is fallen at inclination angle
Inclination angle is fallen plate 60 and is acted on: all pretreatment ore pulps all undoubtedly can the effect of maximum performance agitator arm through stirring region; The exit design of plate 60 is fallen above combined impeller in inclination angle, and object impels all coal slurries all by the strongest stirring region, modified to realize sizing mixing of all coal slimes and even most difficult-to-float coal.And the inclination angle why plate 60 is designed to ramp shaped is fallen at inclination angle, being the movement velocity in order to reduce fluid, making it stop pretreatment space time longer.Several groups of bank bars 61 that design is fallen on plate 60 at inclination angle are the pretreatment times in order to distinguish large or fine granule, and move and be subject to the stop of bank bar in coarse granule close adhesion plate face, slowly, pretreatment time is longer for movement velocity; Otherwise fine grained movement velocity is faster, and required pretreatment time gets final product corresponding shortening, finally realizes the efficient mixed processing effect of its controlledization.
(5) action of forced stirring chamber
Action of forced stirring chamber mainly contains the multiple layer combination impeller be made up of stator wall 72 and impeller 71, and collocation stroke diaphragm agitator is formed.In Fig. 1, impeller 71 is divided into upper strata impeller and lower floor's impeller, to form layer impeller structure.In the surrounding of impeller 71, stator wall 72 is installed.Stroke diaphragm agitator is arranged at the blending bin 20 tank wall place of surrounding.Between every adjacent two layers action of forced stirring chamber with false base spacer 80 arrange in pairs or groups mixed cell 90 formed mixing runner.
During practical operation, material falls the top that plate 60 end flow into first combined impeller from inclination angle, under the constraint of stator wall 72, all ore pulps all flow through the stirring area of bilayer combination impeller, ore pulp and medicament, by the high shear of bilayer combination impeller and the collisional mixing effect of action of forced stirring effect and stator system, are able to efficient mixing.One group of stroke diaphragm agitator is arranged every 90 ° of angles at the tank wall of cylindrical blending bin 20, drive motors 102 moves back and forth in certain stroke distances with dynamic stroke axle 101, thus drive macromolecular material barrier film 103 back and forth movement, to guarantee that the space, flow field of tank wall surrounding is in high turbulent environment, avoid the flow field environment of " center high shear; the low turbulent flow of surrounding ", be conducive to the modified effect of sizing mixing playing whole stirring space.
Material after above-mentioned mixing, then flows into from the mixing runner bottom this layer of action of forced stirring chamber, carries out secondary agitation mixing to enter lower one deck action of forced stirring chamber, the like.The mixed cell 90 installed in mixing runner, further can play the effect of efficiently sizing mixing in this action of forced stirring space.
2,1 process aspect
This equipment plays good modified effect to entering float coal mud, is particularly suitable for the upgrading of sizing mixing of difficult floating Bed for Fine Coal.In a flotation or secondary flotation, floatation feed is cut thick equipment such as hydrocyclone group, hydrocyclone group and adds spiral, cuts thick sieve bend, cuts after a thick sieve bend adds technical gradings such as cutting thick sieve bend series connection and be divided into thick, fine fraction.Fine fraction final utilization on-mechanical agitation type flotation machine, as the sorting such as flotation column, air jet flotation machine, now uses this equipment better than traditional coal slurry pre-processing device effect.Reason is in this kind of technique, the ratio that fine fraction accounts for floatation feed is large, the pretreatment that coal slime needs is longer, the environment of sizing mixing needed is higher, but not agitation impeller flotator itself is sized mixing, function is more weak, use this equipment can significantly improve the effect of this type of technique, its operating efficiency and usefulness all can obviously be promoted.
Claims (10)
1. the coal slime degree of depth is sized mixing a upgrading facility, it is characterized in that: the stepped mixing system comprising blending bin (20) and be arranged in blending bin (20); The cavity top place of blending bin (20) arranges medicament dispersion slot (30), medicament dispersion slot (30) outside sets gradually the ore pulp feed chute (50) of annular dispersal unit (40) and ring-type, the external groove sidevall of described ore pulp feed chute (50) is the tank wall of blending bin (20) and madial wall forms overflow wall, enters the annular dispersal unit possessing shear-mixed function after the medicament mixed liquor that the ore pulp overflowed and medicament dispersion slot (30) place overflow mixes; Plate (60) is fallen at the discharging opening arranged beneath inclination angle of annular dispersal unit (40); The upper plumbing arrangement driving shaft (70) of blending bin (20), it is that the bell mouth shape upwarping extension to driving shaft (70) axis by blending bin (20) tank wall constructs that plate (60) is fallen at inclination angle, fall at inclination angle on plate (60) and set gradually many bank bars (61) along mixed liquor direct of travel, the gap having between plate (60) and driving shaft (70) and fall for mixed liquor is fallen at inclination angle; Driving shaft (70) is also coaxially installed with impeller (71), impeller (71) is arranged in inclination angle and falls plate (60) below place, wound impeller (71) is furnished with stator wall (72), and the inner ring surface that stator wall (72) falls plate (60) by inclination angle is postponed downwards and formed; The liquid outlet of blending bin (20) is positioned at its bottom face place;
Blending bin (20) top end face arranges and is used for providing medicament dispersion slot (30) with the spray dispersion shower nozzle (10) of the double block form of medicament mixed liquor, spray dispersion shower nozzle (10) comprises the body possessing hollow tube chamber, and described body is Venturi tube; The entrance (10a) of body is communicated with outside ore pulp pipeline, and the contraction section (10b) of body or venturi (10c) are communicated with outside medicament pipeline, and the diffuser (10d) of body forms mixture export pipe; Arrange that nozzle blade (11) forms separate chamber to make entrance (10a) at entrance (10a) end of body hollow tube chamber, nozzle blade (11) is arranged nozzle (12) and the charging aperture of this nozzle (12) is communicated with the residing chamber of entrance (10a) and discharge end is communicated with the residing chamber of contraction section (10b); The side plate face place being positioned at the residing chamber of entrance (10a) of nozzle blade (11) arranges guide vane (13), and described each guide vane (13) profile is the arc sheet of cambered surface parallel nozzle (12) axis and entirety line centered by body axis is scroll layout; Nozzle (12) is for being arranged in the side place, close body axis place of corresponding guide vane (13) one to one around uniform multiple and each nozzle (12) along body axis; Diffuser (10d) is the forked structure of tube body along the distribution of body axis circumference, and each bifurcated of this forked structure of tube body all forms one section of mixture export pipe; Medicament dispersion slot (30) is for groove is each other to two that are arranged in parallel; The diffuser (10d) of each spray dispersion shower nozzle (10) probes in the vallecular cavity of corresponding medicament dispersion slot (30).
2. a kind of coal slime degree of depth according to claim 1 is sized mixing upgrading facility, it is characterized in that: the charging aperture of described nozzle (12) is circular hole, the close side, pipe body lumen wall place of guide vane (13) and this chamber wall of body affixed, the dead in line that guide vane (13) extends near side, body axis place curved extended surface and the nozzle (12) formed is arranged; The diffuser (10d) of body is interior is that scroll is furnished with mixing catch (14) along body axis.
3. a kind of coal slime degree of depth according to claim 1 and 2 is sized mixing upgrading facility, it is characterized in that: stator wall (72) possesses the hypomere of upper narrow lower wealthy bell mouth shape epimere and straight cylindrical structure, and between the bottom external diameter of hypomere external diameter and epimere, equal diameter is arranged; The described impeller (71) be positioned on driving shaft (70) is at least coaxially arranged two-layer, upper strata impeller diameter is less than lower floor's impeller diameter and upper strata impeller is positioned at epimere and lower floor's impeller is positioned at hypomere, and two-layer impeller forms the layer impeller structure coordinated with stator wall (72) jointly.
4. a kind of coal slime degree of depth according to claim 3 is sized mixing upgrading facility, it is characterized in that: along driving shaft (70) axis direction, fall arranging multiplayer action of forced stirring chamber from top to bottom in plate (60) blending bin below (20) cavity space at inclination angle, often organize action of forced stirring chamber and comprise one group of layer impeller structure respectively; The liquid outlet in action of forced stirring chamber is all positioned at its bottom face place, and the stator wall (72) in every one deck action of forced stirring chamber all forms its inlet with impeller (71) fit clearance; All pad at the bottom face place often organizing action of forced stirring chamber and be provided with the flat false base spacer (80) of one deck, and there is fit clearance in order to sandwiched mixed cell (90) in both; Mixed cell (90) and annular dispersal unit (40) form along mixed liquor flow direction interlaced arrangement by catch.
5. a kind of coal slime degree of depth according to claim 4 is sized mixing upgrading facility, it is characterized in that: the wall place, chamber in each layer action of forced stirring chamber all arranges stroke diaphragm agitator; Described stroke diaphragm agitator comprises the stroke axle (101) running through blending bin (20) tank wall along driving shaft (70) radial direction, and driving this stroke axle (101) work along the drive motors (102) of the linear reciprocation action of bar length direction, macromolecular material barrier film (103) arranged by the rod end being positioned at blending bin (20) inner chamber of stroke axle (101); The film limit of macromolecular material barrier film (103) is fixed in sleeve (104) top gone out by the inwall projection of blending bin (20), the center of macromolecular material barrier film (103) and the affixed layout of stroke axle (101) rod end.
6. a kind of coal slime degree of depth according to claim 5 is sized mixing upgrading facility, it is characterized in that: the stroke diaphragm agitator at each layer action of forced stirring chamber place be four and the circumferential hoop along blending bin (20) tank wall of equal altitudes around uniform.
7. a kind of coal slime degree of depth according to claim 1 and 2 is sized mixing upgrading facility, it is characterized in that: the top cover of the ore pulp feed chute (50) of described annular is provided with the cover plate (51) of annular, cover plate (51) runs through plate body and arrange overfall (52), each overfall (52) is uniform successively along the circumferential direction of cover plate (51).
8. a kind of coal slime degree of depth according to claim 1 and 2 is sized mixing upgrading facility, it is characterized in that: two groove ends of described medicament dispersion slot (30) and relatively all constructing in sealing surface near a cell wall of annular dispersal unit (40), and this sealing surface is textural arranges the fluid hole (31) being communicated with vallecular cavity; Between this sealing surface structure and annular dispersal unit (40), arrange transition overflow launder (32), the spillwag chute of described transition overflow launder (32) and the inner ring surface coplanar of annular dispersal unit (40) are arranged.
9. a kind of coal slime degree of depth according to claim 1 and 2 is sized mixing upgrading facility, it is characterized in that: extended on the medicament pipeline of spray dispersion shower nozzle (10) by chemical tank (110), and for supply jet distribution showerhead (10) with the ore pulp pipeline of ore pulp, all set gradually by-pass valve control (120) and flowmeter (130) along liquid flow direction.
10. a kind of coal slime degree of depth according to claim 4 is sized mixing upgrading facility, it is characterized in that: the liquid outlet profile of described blending bin (20) is straight cylindrical structure, arranges mixed cell (90) in its liquid outlet equally.
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| CN201510862721.8A CN105289389B (en) | 2015-11-27 | 2015-11-27 | Equipment of deeply slurry mixing and modifying for coal slime |
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| CN201510862721.8A CN105289389B (en) | 2015-11-27 | 2015-11-27 | Equipment of deeply slurry mixing and modifying for coal slime |
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| CN107413238A (en) * | 2017-07-31 | 2017-12-01 | 杭州跟策科技有限公司 | Powder humidifier and powder air-humidification method |
| CN108246516A (en) * | 2018-03-28 | 2018-07-06 | 中国矿业大学 | A kind of intensified Daqu medicament and the system and method for mineral grain mixing |
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| CN105289389B (en) | 2017-05-17 |
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