CN103252183A - Classifying dropping-type coal slurry pretreating device - Google Patents

Abstract

The invention belongs to the field of coal slime powder pretreating, and specifically relates to a classifying dropping-type coal slurry pretreating device. The classifying drop-type coal slurry pretreating device provided by invention at least comprises a dropping box and a classifying dropping system, wherein a flotation agent feeding part and a coal slurry feeding part are correspondingly arranged above the classifying dropping system, the classifying dropping system comprises sliding plates which are arranged in a space layering manner, and the sliding plates which are arranged in a layer-by-layer manner are joined each other from head to end so as to form a channel for mixing and traveling of coal slurry and a flotation agent. The device also comprises a splitting unit, wherein the splitting unit is at least arranged on the discharge end of one layer of sliding plate, and the splitting end of the splitting unit is positioned on the layering surface of dropping paths of low-ash-content coarse granules and high-ash-content fine clay of the coal slurry on the layer of sliding plate. Through a stripping effect of the splitting unit on high-ash-content fine clay and low-ash-content coarse granules, the pollution of the high-ash-content fine clay to floatation fine coal is farthest lightened, the operating efficiency of the classifying dropping-type coal slurry pretreating device is improved, meanwhile, the practical input amount of the flotation agent is also greatly reduced, and the control on the pretreating cost is facilitated.

Description

Classification drop type coal slurry pretreatment unit

Technical field

The invention belongs to coal slime powder preprocessing technical field, be specifically related to a kind of classification drop type coal slurry pretreatment unit.

Background technology

Because the floatability of China's coal slime is generally relatively poor, so the coal slurry preliminary treatment is requisite link in the floatation coal separation technique, is the prerequisite that flotation device obtains good techno-economic.The coal slurry necessity for pretreatment mainly contains following 4 points: 1), floating agent is fully disperseed, the floating agent of coal slime is insoluble or be slightly soluble in water, has only it fully is dispersed into a large amount of fine droplets, could evenly be mixed into it in coal slurry; 2), the floating agent that disperses is blended in the 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 need have certain effect the time at coal grain surface generation physical-chemical reaction; 4), will go into the float coal slurry and be diluted to rational concentration range.

In view of this, the research and development of being devoted to the coal slurry pre-processing device are both at home and abroad all the time made; The application people is that (application number: patent of invention text 201010033384.9) has just been announced following technical scheme: it is made up of atomization system, upper box body and lower part box three parts " atomized fall type coal paste preprocessor " for Tangshan Guohua Technology Co., Ltd in the patent name of application on January 15th, 2010.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 atomizing workspace, and there is the center feed chute in the casing outside, and 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 all is equipped with three upper slides and two lower skateboards, uniform contour bank bar on each slide plate.During actual the use, flotation agent flows in the sleeve of the dish top that hazes through dosing funnel and pipeline, and splashes down at the Pan Zhengmianzhongxinqu that hazes, and sticks to and forms one deck thin liquid film on the card of rotating at a high speed, under action of centrifugal force, to the plate edge motion, be droplet by the saw cut of plate edge; Going into the float coal slurry is assigned in the downflow weir of upper box body both sides through the center feed chute, widely along the weir be the waterfall shape overflow, it meets with the flotation agent droplet in letting out process, some droplet directly drops to the ground floor upper slide by gravity, afterwards, the coal slurry that is mixed with flotation agent is by the bank bar of upper and lower slide plate, jumps up continuously and falls, make coal slurry fully mix with the flotation agent droplet, enter flotation device until discharging from bottom half.As coal slurry pretreatment unit comparatively advanced in the field, above-mentioned structure has effectively solved the problem of present high-ash thin mud and the required different pretreatment times of low ash content coarse granule, thereby has realized the coarse grained floating agent mixed effect of low ash content preferably; Yet, during actual the use, the defective that said structure exists still can't neglect: at first, because slide plate itself has constituted the passage that the coal supply slurry is advanced, during operation, thickness coal slurry particle no matter, all inevitably need in turn by each slide plate plate face, it no doubt is conducive to increase the low coarse grained medicament of ash content and mixes effect thoroughly, be infected with too much flotation agent but simultaneously the thin mud of high ash content still can be unnecessary, for this thin mud of high ash content that does not participate in fully finally catching during for the later stage flotation, be unnecessary fully, and the fine coal slurry specific area is big, high adsorption capacity, Xi Fu nonpolar oils collecting agent very easily, also namely still can after enter flotation device, cause the selective variation of flotation, thereby influence quality of cleaned coal; On the other hand, the mixed effect of above-mentioned floating agent, the vaporific medicament that all relies on the dish that hazes to rotate and exhale is realized, this just needs a sealed shape casing that is used to form confined space, can avoid the meaningless of vaporific medicament to fly away, the layout of its seal case, but often caused during actual the use such as the dish working environment that hazes relatively poor and be easy to send product bug, can't realize intuitively observing and even producing fault and also be difficult to many defectives such as discoverys in time for slurries mixed process, thereby bring puzzlement to execute-in-place and maintenance work; In addition, it requires too highly for the haze motor speed of disc spins of driving, also namely must adopt the secondary motor of rotating speed up to 3000 rev/mins, and this all be that assembling, purchase and even the maintenance cost of reality causes severe challenge.How to develop a kind of coal slurry pretreatment unit simple in structure, thereby be implemented in and reduce coal slurry preliminary treatment cost, also can reach it when promoting its operating efficiency for the in good time testing goal of body duty, be the technical barrier to be solved of compeling over past ten years both at home and abroad.

Summary of the invention

The purpose of this invention is to provide a kind of classification drop type coal slurry pretreatment unit simple in structure, its high efficiency can effectively reduce the preliminary treatment cost of coal slurry.

For achieving the above object, the present invention has adopted following technical scheme: a kind of classification drop type coal slurry pretreatment unit, at least comprise falling case and being arranged at the classification of falling in the case and fall system, system's corresponding layout flotation agent feeder in top and coal slurry feeder are fallen in classification, described classification is fallen system and is comprised the slide plate that is the space delamination layout, successively each slide plate of Bu Zhiing each other tandem array form the passage that coal supply slurry and flotation agent mix and advances, it is characterized in that: described classification drop type coal slurry pretreatment unit also comprises the branch material unit, the discharge end place of described minute material unit one deck slide plate disposed therein at least, the sub-material end of described minute material unit is positioned at the low ash content coarse granule of coal slurry on this layer slide plate and the branch aspect place that the thin mud of high ash content leaves the path.

Described minute material unit profile be sleeve shaped arc plate or knuckle tabular, its top is arranged in the low ash content coarse granule of coal slurry on the bilgeway and the branch aspect place that leaves the path of the thin mud of high ash content constitutes its sub-material end, the overlap joint setting of postponing between the base of branch material unit and lower floor's slide plate charging end plate face.

The material unit profile was cylinder shape in described minute, comprise the vertically arranged tubular vertical of plate face plate and be arranged in the swash plate that extend downwards at the inclination angle that is at vertical plate side plate face place, between described swash plate top and vertical plate stage casing plate face affixed arrange to form divide material unit " people " shaped sections constructs; Divide the branch aspect place that leaves the path of low ash content coarse granule that the pointed tip of material unit is arranged in coal slurry on the bilgeway and the thin mud of high ash content and constitute its sub-material end, divide material unit wherein between a base and lower floor's slide plate feed end edges of boards overlap joint and the swash plate place plate face that divides material unit towards lower floor's slide plate place side layout.

The slide plate profile is tapered sleeve shape ring plate shape, and the anchor ring incline direction of every adjacent two layers slide plate oppositely arranges; Described slide plate plate face is provided with the bank bar, and the vertical coal slurry direct of travel of bank bar arranged direction is arranged; Described slide plate upper surface place is provided with the draw-in groove of the vertical coal slurry direct of travel of flute length direction, on described bank bar bottom and the slide plate between respective card slot the formation clamping cooperate.

Described slide plate is constructed for seven laminars of successively arranging from top to bottom and the tapered sleeve shape enlarging of the superiors' slide plate is the funnel-form layout up, material unit comprised first fen material unit and second fen material unit in described minute, and first fen material unit is arranged in to overlap between the feed end edges of boards of the superiors slide plate discharge end place and its base and second layer slide plate and cooperates; Second fen material unit is arranged in that overlap joint arranges between the feed end edges of boards of the 4th layer of slide plate discharge end place and its base and layer 5 slide plate.

Described classification drop type coal slurry pretreatment unit also comprises the adjusting parts that divide material unit to move along its vertical generation play for regulating, described adjusting parts are regulated spanner for prizing formula, this is regulated parts one end and divides material unit affixed layout, and the other end is postponed for running through and stretch out and fallen case and arrange outward.

The coal slurry feeder is annular overflow trough columnar structure, fall the case profile and be a side channel wall cylindric and its cylindrical inner wall formation coal slurry feeder, the opposite side cell wall of coal slurry feeder constitutes its overflow wall, constitutes overlap joint between the charging end plate face of the notch of described overflow wall and the superiors' slide plate and cooperates; Be lower than its overflow wall height place in the coal slurry feeder and be provided with diaphragm plate, this diaphragm plate is isolated into lower chamber and upper slot chamber with the coal slurry feeder, is furnished with the intercommunicating pore that is communicated with two cavitys on this diaphragm plate.

The cylindric holding tank that the flotation agent feeder comprises the emulsification injection unit and is arranged in emulsification injection unit below, described holding tank outer wall place is provided with the ring-type overflow launder; Ring-type overflow launder inwall constitutes the cell wall of cylindric holding tank, and its outer wall constitutes overflow wall, and the overflow route of ring-type overflow launder is in the superiors slide plate plate face top and arranges; Offer on the holding tank cell wall for the Kong Lu that is communicated with ring-type overflow launder vallecular cavity and holding tank vallecular cavity.

Described emulsification injection unit is negative pressure injecting type shower nozzle, comprise exterior tubular body and be arranged at the interior built-in (operating) water nozzle of body, described built-in (operating) water nozzle is between hollow frustum and its outer wall and exterior tubular body inwall and forms spray chamber, the medicament feeding pipe that its axis symmetric arrangement of the exterior tubular body upper edge of emulsification injection unit has at least one pair of to be communicated with its spray chamber; Emulsification injection unit upper end constitutes water liquid feed end, and the aperture, lower end of described emulsification injection unit constitutes mixture export.

The mixture export of described emulsification injection unit closes on its place, end and is provided with the secondary mixed cell; Described secondary mixed cell comprise be arranged in the mixture export to be used for the mixture export subdivision be the plumbous vertical panel of two halves cylindrical cavity shape and be positioned at above-mentioned two halves cylindrical cavity and be symmetrically arranged in " S " shape wave bent plate of plumbous vertical panel both sides, the vertical mixed liquor descent path of the formed crestal line of ridge shape crest of described wave bent plate arranges.

Beneficial effect of the present invention is:

1), the system of falling that has used for reference traditional drop type coal slurry pre-processing device constructs, and on its basis, utilization is fallen the terraced stratiform slide plate of system to thick in the coal slurry, fine grained has different contact pretreatment times and the work characteristics of the time of staying, also namely low ash content coarse granule is close to skateboarding and even is subjected to stopping of bank bar under himself weight and kinetic energy, movement velocity is slow, impelling curve after flowing out slide plate is less, and high-ash thin mud is with the upper strata water movement, movement velocity is fast on slide plate, impelling curve after flowing out slide plate is bigger, this moment its between the two nature just have certain road branch aspect; By its minute the aspect place arrange to divide a material unit, as deflector etc., thereby the people roughly peels off purpose for reaching with high-ash thin mud and the coarse grained classification of low ash content.The low required pretreatment time of ash content coarse granule is long, therefore can repeatedly mix through the multiple tracks slide plate after minute material unit classification, impels it surperficially can adhere to enough and stable oil film, can adhere to bubble floating quickly after entering flotation device; High-ash thin mud is because no flotation value, need not too much to participate in adhering to operation, therefore under the effect of minute material unit, in advance it is peeled off away to reduce it by way of the time of slide plate plate face as far as possible, when guaranteeing the coarse grained medicament parcel of high ash content and mix uniformly effect, optionally reduced the pretreatment time of the thin mud of high ash content, avoid the too much flotation agent of its surface absorption, in follow-up flotation device, just slowed down their flotation speed, not only played and farthest alleviated the thin mud of high ash to the effect of the pollution of floatation clean coal, to promote its operating efficiency, also greatly reduce simultaneously the actual input amount of flotation agent, to be conducive to control its preliminary treatment cost.

2), divide material unit or directly be tabular, or be aforesaid " people " font, a delamination purpose that only needs can play for different component in the coal slurry gets final product; In fact, for " people " font divides the setting of material unit, obviously more can play in dredging coal slurry in each component, the setting of its swash plate has also guaranteed for the low coarse grained oblique drainage effect of ash content wherein, thereby has guaranteed that effectively the low ash content coarse granule in the coal slurry can accurately slide to down slide plate place, road under swash plate is postponed; And the tubular vertical plate of arranging along vertical, when then having avoided the thin mud of high ash content to cross its plate body under high potential energy, the deposition path of vertical plate is for issuable interference between the descent path of the thin mud of high ash content, to promote its charge stripping efficiency.

3), because the fretting wear that corresponding bank bar certainly exists on low ash content coarse granule and the slide plate in the coal slurry herein by the layout of detachable bank bar, has been guaranteed the convertibility of bank bar, think that quick maintenance and the maintenance in its later stage facilitates.

4), divide material unit by placing the adjusting parts that fall the case outside, fall the inner purpose of dividing the relative position of material unit and slide plate of case thereby play to regulate; By personnel's visual observation, and rely on prizing of regulon to wait operation, the very simple partial dislocation purpose that can realize falling branch material unit in the case, thus make its sub-material end be in the most appropriate coal slurry branch aspect place all the time, with its service behaviour of further lifting.

5), overflow launder structure by flotation agent feeder and coal slurry feeder, guaranteed the uniformity of charging, rely on employing center pan feeding, the enter material way of double-sided overflow, stable to keep out-feed liquid stream, form certain discharge height simultaneously, coal slurry after medicament emulsion and the dilution mixes in the collision of the superiors slide plates, finally advance and progressively participate in the subsequent treatment operation along slide plate, its overall work is reliable and stable, the injecting type charging of flotation agent does not need painstakingly to pursue full-closed environment fully yet, and even normal uncovered tubular environment can be realized the stable charging demand of its flotation agent, its obviously more can the handled easily personnel intuitively visual, thereby it is in good time in the purpose of appraisals of falling each parts and coal slurry and flotation agent admixture in the case to play, the operation intuitive is higher, thereby is the good prerequisite of coal slurry high-efficiency pretreatment creation.

Description of drawings

Fig. 1 is structural representation of the present invention;

Fig. 2 is the schematic top plan view of Fig. 1 structure;

Fig. 3 is emulsification injection unit structural representation;

Fig. 4 is the structural representation of secondary mixed cell;

Fig. 5 is that the secondary mixed cell is along the end view of its axial direction;

Fig. 6 is the structure cutaway view of first fen material unit;

Fig. 7 is the structure cutaway view of second fen material unit.

The specific embodiment

By reference to the accompanying drawings concrete part of the present invention is described as follows again below:

The present invention draws the center pan feeding of traditional atomized fall type coal paste preprocessor, the advantage of left and right sides overflow, giving up the dish atomizing medicament that hazes causes the whole work system must be under the environment of sealing, but the operator can't facilities for observation internal work situation shortcoming, adopt the water of unique texture to spray the emulsifier emulsified agent, reach the effect of dispersion and emulsion medicament on the one hand, whole work system is opened wide the operator, the operator can know the working condition of understanding equipment, handled easily.Having used for reference tradition falls in the 40 pairs of coal slurries of each slide plate that have bank bar 41 in the case 10 thick, fine grained also namely hangs down the ash content coarse granule has the different operational advantages that contacts pretreatment time with the thin mud of high ash content, simultaneously at the superiors and even the 4th layer of slide plate discharging opening, the creationary design " people " font divides material unit, thereby realized thick in the coal slurry, fine-graded classification purpose, concrete coal slurry, the flow direction of flotation agent and emulsion and even mixture slurry is shown in the dotted arrow among Fig. 1-4, thick with further increasing, fine fraction is the difference on the time of staying in preprocessor, eliminate the influence of the thin mud of high ash, make the coal grain surface of required flotation can form enough, stable oil film, the thin mud of low ash content that need not in the floating operation to extract then reduces its flotation agent adhesive capacity as far as possible, thereby create good process conditions for the coal slurry preliminary treatment, finally guarantee follow-up flotation quality.

Specifically describe:

1.1 the design of casing

The casing that the present invention is designed is not the simple body structure of indiscriminately imitating the serial coal paste preprocessor of traditional XK and tradition atomizing-fall type coal paste preprocessor, but considers the coal slime flotation technological factor comprehensively, improves.

(1), the design of feed box

Feed box, also be the whole design of material feeding box of coal slurry feeder 20 above a side of falling case 10 casings, as shown in Figure 2, feed box central tube A is the coal slurry feeding pipe, both sides are clear water pipe B.The design takes into full account from technology, with before emulsified agent contacts, earlier it is diluted to suitable concentration at coal slurry, thereby helps medicament to form enough, stable oil film on coal grain surface.

(2), the case 10 of falling of the present invention is cylindrical box, top is emulsification and charging space, for guaranteeing all even pipe arrangements that makes things convenient in the factory building of charging, thereby has adopted the enter material way of center pan feeding, double-sided overflow; For guaranteeing to be provided with diaphragm plate 31 along the even overflow purpose of coal slurry feeder 30 overflow wall of annular overflow trough shape in its overflow launder, 7 of the apertures of uniform Φ 300mm are to form intercommunicating pore 32 on the diaphragm plate 31; The overflow wall height of coal slurry feeder 30 is 100mm, and is stable to keep out-feed liquid stream.

(3), emulsified agent case

The emulsified agent case, case 10 box house upsides are being fallen in cylindric holding tank 22 designs that also are aforesaid formation flotation agent feeder 20, be cylindrical shape, 7 of the apertures of uniform Φ 100mm are to constitute the Kong Lu that are communicated with ring-type overflow launder 23 vallecular cavities and holding tank 22 vallecular cavities all around, outer annular overflow launder 23 height 230mm, stable to keep out-feed liquid stream, simultaneously also can form certain discharge height naturally, medicament emulsion mixes with the superiors slide plates collision of coal slurry in falling case 10 casings after the dilution, and finally advances along the downslide path that slide plate 40 constitutes.

1.2 reagent emulsifying system

The present invention adopts the reagent emulsifying system, can disperse to cut medicament on the one hand, forms the little oil droplet of 5～20 μ m, to form emulsion; On the other hand, adopt the emulsification spraying system to replace traditional atomization system, can form better man-machine communication interface.The atomization system that adopts tradition to haze and coil, the housing of whole preprocessor must seal, pinpointing the problems, dealing with problems all needs the long time, adopted the reagent emulsifying system, preprocessor can be worked under the environment that opens wide, operating personnel can observe the working condition of equipment, find, deal with problems in time.

(1), reagent emulsifying device

The reagent emulsifying device that this patent adopts also is that emulsification injection unit 21 is that a kind of water sprays emulsifier, but be not the structure of indiscriminately imitating the traditional water injector, but at operating position, improve: certain pressure clear water enters from its water liquid feed end, spray from its inwardly projecting orifice with 15m/s speed, in the spray chamber of emulsification injection unit 21, form negative pressure, thereby with the medicament feeding pipe 211 suction spray chambers of medicament from both sides, medicament is dispersed into the little oil droplet of 5～20 μ m by high speed water jet impact and cutting with it, to form emulsion; Finish as yet for the processing of its emulsion this moment, and fully mix again and disperses discharge more at last at the emulsion waveform mixed plate group place that still needs to enter again the secondary mixed cell afterwards.

Reagent emulsifying device design feature:

1), medicament feeding pipe 211 presents the axially symmetric structure with respect to emulsification injection unit 21 axis; The gas pressure that inner jet is subjected to reaches unanimity, and is conducive to the stabilized fluid motion, also helps the even contact of medicament and fluid simultaneously.

2), shown in Fig. 4-5, there is a vertical baffle to constitute plumbous vertical panel 212 in the middle of the secondary mixed cell, both sides have two waveform baffle plates to form wave bent plate 213, thereby the hybrid loop zone of its inner chamber is divided into four zones, when emulsion disperses the little oil droplet of formation to pass through this secondary mixed cell, cut apart again and alter course and produce eddy current, cut apart the flotation agent oil droplet and water liquid mixes purpose further to reach; Certainly, also can carry out other number of areas according to on-site situation when reality is used and divide, much more no longer the effect that only need play its eddy current effect and dispersed oil droplets gets final product, just to be described herein herein.

1.3 system is fallen in layering

(1), as shown in Figure 1, case 10 internal layers are stacked arranges seven layers of slide plate 40 successively falling, and the angle of the plate face of every layer of slide plate 40 and horizontal plane is 8 °; It is with being intended to: allow the flow velocity of coal slurry on slide plate 40 keep proper speed, both guaranteed the incorporation time of coal slurry and flotation agent, guaranteed bigger treating capacity again, the height of equipment also is unlikely to excessive simultaneously.

(2), in seven layers of slide plate, be followed successively by one, two, three, four, five, six, seven layer of definition from top to bottom, three bank bars 41, four, six, seven layers wherein are installed on one, two, three, five layer of slide plate are gone up four bank bars 41 are installed.Bank bar 41 cross sections are trapezoidal, last bottom width 10mm, following bottom width 25mm, and high 20mm adopts the high molecular abrasion-proof material to make.Bank bar 41 is connected with slide plate 40 by draw-in groove, is convenient to change.Each bank bar is pressed the 180mm equidistant placement, and the purpose that adopts the intensive layout of high bank bar is to improve the turbulence level of liquid stream.

(3), be provided with " people " font in the exit of ground floor slide plate and the 4th layer of slide plate and divide material unit, its concrete structure is with reference to shown in Fig. 6-7, set up between arbitrary base of branch material unit and lower floor's slide plate plate face and constitute the passage that the low ash content coarse granule of guiding is advanced, the plate side at corresponding its another place, base then constitutes the zone of falling of the thin mud of high ash content naturally, so that the thin mud of high ash content can directly be crossed over and specify number slide plate and reduce it and the adhesive capacity of flotation agent, can regulate and fall inner material units and the relative position of slide plate 40 of dividing of case 10 and then can realize accurate location for the branch aspect of aforementioned low ash content coarse granule and the thin mud of high ash content by being communicated in outside spanner, to guarantee the sub-material water conservancy diversion effect of branch material unit; The adjustment height formula structure that distinctive among the present invention " people " font divides material unit to constitute, can play the coarse grained purpose of upper strata fine grained and lower floor in the shunting coal slurry more easily, fine grained also is that the thin mud of high ash content is directly fallen the 4th layer of slide plate from ground floor slide plate end, falls the layer 7 slide plate by the 4th layer of slide plate end.In whole falling process, coarse granule also is that the low ash content raw granulate fraction in the coal slurry must successively glide through seven layers of slide plate in falling case 10 casings successively, fine grained then only needs through three layers of slide plate 40 in falling case 10 casings, it is longer that the time that coarse granule is prepared is compared the fine grain time, thereby realize that variable grain has different pretreatment times, for the sorting process of coal slurry provides better process conditions.

4.1 course of work brief description

During practical operation, as shown in Figure 1, the clear water with certain pressure enters emulsification injection unit 21 through valve C, flowmeter D, forms high-speed jet in the exit of built-in (operating) water nozzle; Because the swabbing action of jet, also be that spray chamber forms negative pressure at the inner chamber of emulsification injection unit 21, medicament is dispersed into the little oil droplet of 5～20 μ m by high speed water jet impact and cutting with it after sucking spray chamber from the entrance of both sides, forms emulsion; The secondary mixed cell that emulsion enters the trunnion bottom of emulsification injection unit 21 fully mixes again and disperses, and is discharged and is finally dropped down onto in the holding tank 22 of its underpart by outlet at last, finally flows into ring-type overflow launders 23 via holding tank 22 and overflows.For guaranteeing that emulsification injection unit 21 is unlikely to holding tank 22 bottom lands are produced the impact wear phenomenon when permanent the use, can come it is expected protection by setting in advance wear Protection measures such as wearing plate, specifically as shown in Figure 1.

Coal slurry enters annular overflow trough shape coal slurry feeder 30 through feed box, evenly spilling into ground floor along its overflow wall also is on the superiors' slide plate, mix with the medicament emulsion collision that aforementioned flotation agent feed end overflows, be mixed with the coal slurry of flotation agent by the bank bar 41 on the ground floor slide plate, jump up continuously and fall, make coal slurry fully mix with emulsified agent, enter flotation device until discharging from bottom half.Low ash content coarse granule is close to slide plate 40 motions and is subjected to stopping of bank bar 41, and movement velocity is slow, and pretreatment time is long, impels it surperficially can adhere to enough and stable oil film, can adhere to bubble floating quickly after entering flotation device.High-ash thin mud is with the upper strata water movement, movement velocity is fast, " people " font that arranges at first, the 4th layer of slide plate place divides under the effect of material unit simultaneously, the thin mud of the high ash content three layers of slide plate of only having flowed through, pretreatment time is short, avoid the too much flotation agent of its surface absorption, in flotation device, just slowed down their flotation speed, farthest alleviate the thin mud of high ash content to the pollution of floatation clean coal; Low ash content coarse granule is then successively covered the plate face of whole slide plates 40, the floating agent that disperses has adequate time, can wrap up fully well being mixed on the low ash content coarse granule, forms comparatively stable oil film, thereby improve its hydrophobicity, finally provide reliable assurance for follow-up floating operation.

Claims (10)

1. classification drop type coal slurry pretreatment unit, at least comprise falling case (10) and being arranged at the classification of falling in the case (10) and fall system, system's top corresponding layout flotation agent feeder (20) and coal slurry feeder (30) are fallen in classification, described classification is fallen system and is comprised the slide plate (40) that is the space delamination layout, successively each slide plate (40) of Bu Zhiing each other tandem array form the passage that coal supply slurry and flotation agent mix and advances, it is characterized in that: described classification drop type coal slurry pretreatment unit also comprise for classification dredge the low ash content coarse granule of coal slurry and the thin mudflow of high ash content to the branch material unit, described minute material unit is arranged in the discharge end place of a certain slide plate at least, and the sub-material end of described minute material unit is positioned at the low ash content coarse granule of coal slurry on this layer slide plate and the branch aspect place that the thin mud of high ash content leaves the path.

2. classification drop type coal slurry pretreatment unit according to claim 1, it is characterized in that: described minute material unit profile be sleeve shaped arc plate or knuckle tabular, its top is arranged in the low ash content coarse granule of the last coal slurry of bilgeway (40) and the branch aspect place that leaves the path of the thin mud of high ash content constitutes its sub-material end, the overlap joint setting of postponing between the base of branch material unit and lower floor's slide plate (40) charging end plate face.

3. classification drop type coal slurry pretreatment unit according to claim 1, it is characterized in that: the material unit profile was cylinder shape in described minute, comprise the vertically arranged tubular vertical of plate face plate (51) and be arranged in the swash plate (52) that extend downwards at the inclination angle that is at vertical plate (51) side plate face place, between described swash plate (52) top and vertical plate (51) stage casing plate face affixed arrange to form divide material unit " people " shaped sections constructs; Divide the pointed tip of material unit to be arranged in bilgeway (40) and go up the branch aspect place that leaves the path of the low ash content coarse granule of coal slurry and the thin mud of high ash content and constitute its sub-material end, divide material unit wherein between a base and lower floor's slide plate (40) feed end edges of boards overlap joint and swash plate (52) the place plate face that divides material unit towards lower floor's slide plate place side layout.

4. according to claim 2 or 3 described classification drop type coal slurry pretreatment units, it is characterized in that: slide plate (40) profile is tapered sleeve shape ring plate shape, and the anchor ring incline direction of every adjacent two layers slide plate (40) oppositely arranges; Described slide plate (40) plate face is provided with bank bar (41), and the vertical coal slurry direct of travel of bank bar (41) arranged direction is arranged; Described slide plate (40) upper surface place is provided with the draw-in groove of the vertical coal slurry direct of travel of flute length direction, and described bank bar (41) bottom upward constitutes clamping with slide plate (40) and cooperates between respective card slot.

5. classification drop type coal slurry pretreatment unit according to claim 4, it is characterized in that: described slide plate (40) is constructed for seven laminars of successively arranging from top to bottom and the tapered sleeve shape enlarging of the superiors' slide plate is the funnel-form layout up, material unit comprised first fen material unit (50a) and second fen material unit (50b) in described minute, first minute material unit (50a) be arranged in to overlap between the feed end edges of boards of the superiors slide plate discharge end place and its base and second layer slide plate and cooperate; Second minute material unit (50b) be arranged in that overlap joint arranges between the feed end edges of boards of the 4th layer of slide plate discharge end place and its base and layer 5 slide plate.

6. according to claim 1 or 2 or 3 described classification drop type coal slurry pretreatment units, it is characterized in that: described classification drop type coal slurry pretreatment unit also comprises the adjusting parts that divide material unit to move along its vertical generation play for regulating, described adjusting parts are regulated spanner for prizing formula, this is regulated parts one end and divides material unit affixed layout, and the other end is postponed for running through and stretch out to fall outside the case (10) and arranged.

7. according to claim 1 or 2 or 3 described classification drop type coal slurry pretreatment units, it is characterized in that: coal slurry feeder (30) is annular overflow trough columnar structure, fall case (10) profile and be a side channel wall cylindric and its cylindrical inner wall formation coal slurry feeder (30), the opposite side cell wall of coal slurry feeder (30) constitutes its overflow wall, constitutes overlap joint between the charging end plate face of the notch of described overflow wall and the superiors' slide plate and cooperates; Be lower than its overflow wall height place in the coal slurry feeder (30) and be provided with diaphragm plate (31), this diaphragm plate (31) is isolated into lower chamber and upper slot chamber with coal slurry feeder (30), is furnished with the intercommunicating pore (32) that is communicated with two cavitys on this diaphragm plate (31).

8. according to claim 1 or 2 or 3 described classification drop type coal slurry pretreatment units, it is characterized in that: the cylindric holding tank (22) that flotation agent feeder (20) comprises emulsification injection unit (21) and is arranged in emulsification injection unit (21) below, described holding tank (22) outer wall place is provided with ring-type overflow launder (23); Ring-type overflow launder (23) inwall constitutes the cell wall of cylindric holding tank (22), and its outer wall constitutes overflow wall, and the overflow route of ring-type overflow launder (23) is in the superiors slide plate plate face top and arranges; Offer on holding tank (22) cell wall for the Kong Lu that is communicated with ring-type overflow launder (23) vallecular cavity and holding tank (22) vallecular cavity.

9. classification drop type coal slurry pretreatment unit according to claim 8, it is characterized in that: described emulsification injection unit (21) is negative pressure injecting type shower nozzle, comprise exterior tubular body and be arranged at the interior built-in (operating) water nozzle of body, described built-in (operating) water nozzle is between hollow frustum and its outer wall and exterior tubular body inwall and forms spray chamber, and its axis symmetric arrangement of the exterior tubular body upper edge of emulsification injection unit (21) has at least one pair of medicament feeding pipe (211) that is communicated with its spray chamber; Emulsification injection unit (21) upper end constitutes water liquid feed end, and the aperture, lower end of described emulsification injection unit (21) constitutes mixture export.

10. classification drop type coal slurry pretreatment unit according to claim 9, it is characterized in that: the mixture export place of described emulsification injection unit (21) is provided with the secondary mixed cell; Described secondary mixed cell comprise be arranged in the mixture export to be used for the mixture export subdivision be the plumbous vertical panel (212) of two halves cylindrical cavity shape and be positioned at above-mentioned two halves cylindrical cavity and be symmetrically arranged in " S " shape wave bent plate (213) of plumbous vertical panel (212) both sides, the vertical mixed liquor descent path of the formed crestal line of ridge shape crest of described wave bent plate (213) arranges.

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