CN203264647U - Flotation agent feeding system based on falling type coal slurry preprocessor - Google Patents

Abstract

The utility model relates to the field of coal slurry preprocessors for preprocessing coal slime powder, and in particular relates to a flotation agent feeding system based on a falling type coal slurry preprocessor. The flotation agent feeding system at least comprises a water jetting shower nozzle for mixing water liquor and flotation agent and a secondary mixing unit; the liquid inlet end of the secondary mixing unit is fixedly connected with a mixed liquor outlet of the water jetting shower nozzle, and the inside section on the secondary mixing unit is a cross section-variable structure. According to the cross section-variable structure of the inside section on the secondary mixing unit, i.e., the inside section is gradually or suddenly changed along a mixed liquor falling path; when the initially-mixed mixed liquor jet out of the water jetting shower nozzle, i.e., the common emulsion, passes through the secondary mixing unit, the mixed liquor generates the phenomena such as the turbulent flow, the eddy current and even the turbulent flow within the inside section which suddenly or gradually changes per se, and the mixed liquor can be redivided and redirected, so that the aim of even mixing can be further met.

Description

Flotation agent feed system based on fall type coal paste preprocessor

Technical field

The utility model belongs to for the pretreated coal slurry pre-processing device of coal slime powder field, is specifically related to a kind of flotation agent feed system based on fall type coal paste preprocessor.

Background technology

Because the floatability of China's coal slime is generally relatively poor, so the 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), floating agent (nonpolar oils collecting agent and foaming agent) is fully disperseed, the floating agent of coal slime is insoluble or be slightly soluble in water, only have 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 to have certain effect the time at coal grain surface generation physical-chemical reaction; 4), will enter the float coal slurry and be diluted to rational concentration range.

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

(1), mechanical dispersion

China is after the XY of the research and development eighties in last century series ore pulp preprocessor is that flotation agent is incorporated into dosing nozzle, by the upper strata blade rotary in the stator blade wheel blender, disperse with mechanical system, because the linear velocity of impeller is limited, be only 8.0m/s, the droplet diameter that disperses is larger, is mixed to get evenly not in coal slurry, has increased the flotation agent consumption.

(2), emulsion dispersion

Water-jetting emulsor structure some coal preparation plants of China promote the use of is roughly press water and sprays at a high speed from nozzle, forms negative pressure in the jet chamber.Flotation agent sucks thus and wraps up in and is rolled onto among jet, through hydraulic blow, shearing, is separated into＜oil droplet of 15 μ m, and emulsion is sprayed by mixing tube.Yet this water-jetting emulsor is all one-sided mode of being used as medicine usually, and the gas pressure that this mode 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) atomizing disperses

The XK series kaskad apparatus for pre-flotation pulp conditioning of bringing into use in China the eighties in last century is that " atomized fall type coal paste preprocessor " (application number: 201010033384.9) patent of invention text just announced following technical scheme: it atomization system, upper box body and lower part box three parts be made of for Tangshan Guohua Technology Co., Ltd in the patent name of application on January 15th, 2010 as the application people.Atomization system is comprised 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 and splashes down at the Pan Zhengmianzhongxinqu that hazes in dosing funnel and pipeline flow into the sleeve of the dish top that hazes, and sticks on the card of High Rotation Speed and forms one deck thin liquid film, to the plate edge motion, be droplet by the saw cut of plate edge under the effect of centrifugal force; Entering 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, be mixed with the coal slurry of flotation agent by the bank bar of upper and lower slide plate, jump up continuously and fall, make coal slurry fully mix with the flotation agent droplet, enter flotation device until discharge from bottom half.As coal slurry pretreatment unit comparatively advanced in the field, its flotation agent drop will a less order of magnitude than the drop of emulsion dispersion, and dispersion effect is better; But, when using, reality it is found that, because all relying on the dish that hazes to rotate, realizes the dispersion effect of floating agent in said structure, often need a sealed shape casing that is used to form confined space, can avoid the meaningless of vaporific medicament to fly away, the formation of its closed environment has but often caused 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 in time discoverys for slurries mixed process, thereby brings puzzlement to execute-in-place and maintenance work; In addition, the dish that hazes of high-speed rotation, too high for the requirement of drive motors rotating speed, also namely must adopt the secondary motor of rotating speed up to 3000 rev/mins can guarantee its service behaviour, this is all that actual assembling, purchase and even maintenance cost causes severe challenge.

Summary of the invention

The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, provides a kind of flotation agent feed system based on fall type coal paste preprocessor rational in infrastructure, to realize the uniform feeding demand of flotation agent and water liquid.

For achieving the above object, the utility model has adopted following technical scheme:

A kind of flotation agent feed system based on fall type coal paste preprocessor comprises the water injection shower nozzle that mixes be used to carrying out water liquid and flotation agent at least, and the flotation agent feed system also comprises the secondary mixed cell; Affixed layout between the mixture export of described secondary mixed cell liquid feeding end and water injection shower nozzle, the flow section on the secondary mixed cell is the variable cross-section structure.

Described secondary mixed cell profile is cannula-like, is furnished with more than one wave-shape board in its tube chamber, and the formed crestal line of ridge shape crest of described wave-shape board is vertical or intersect at the setting of mixed liquor descent path.

The formed crestal line of ridge shape crest and the mixed liquor descent path of described wave-shape board are arranged vertically, and described wave-shape board is two and is arranged symmetrically with along secondary mixed cell axis shaft.

The secondary mixed cell also comprises the vertical clapboard that is two symmetrical half cylindrical cavities with its tube chamber subdivision that is arranged in its tube chamber place, and described two wave-shape boards are symmetrically arranged in vertical clapboard plate body both sides.

Secondary mixed cell port of export place is furnished with the bell mouth shape anemostat, the small-caliber end of this anemostat and the affixed setting of the secondary mixed cell port of export.

Described secondary mixed cell sprays with water and is detachable the cooperation between shower nozzle.

It is negative pressure injecting type structure that described water sprays shower nozzle, comprise exterior tubular body and be arranged at the interior built-in (operating) water nozzle of exterior tubular 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 water sprays on the exterior tubular body of shower nozzle and is arranged symmetrically with along its axis the medicament feeding pipe that at least one pair of is communicated with its spray chamber; Water injection shower nozzle upper end consists of water liquid feed end, and the aperture, lower end that water sprays shower nozzle consists of mixture export.

The flotation agent feed system also comprises the holding tank that is arranged in secondary mixed cell below place, and holding tank outer wall place is provided with the ring-type overflow launder; Ring-type overflow launder inwall consists of the cell wall of cylindric holding tank, and its outer wall consists of overflow wall, and the overflow route of ring-type overflow launder and coal slurry travel path intersect to be arranged; 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.

Seven of described Kong Luwei and along the circumferential uniform setting of holding tank cell wall.

Described holding tank is provided with wearing plate at the port of export of secondary mixed cell bottom land place pointed.

The beneficial effects of the utility model are:

1), used for reference the part-structure of traditional water-jetting emulsor, simultaneously add the secondary mixed cell at its port of export, relying on the variable cross-section structure of flow section on the secondary mixed cell, is also that its flow section is gradually or the changing of sudden change on the mixed liquor descent path; Like this, when aforementioned water sprays the mixed liquor of the preliminary mixing that shower nozzle ejects also namely what is often called emulsion is by the secondary mixed cell, this produces turbulent flow, eddy current and even turbulent flow phenomenon mixed liquor in the overflowing end face of sudden change or gradual change, finally make its mixed liquor again be cut apart and alter course, oil droplet part wherein also is able to further be shredded dispersion, further to reach the even mixing purpose of mixed liquor.

2), dependence is placed in the intraluminal wave-shape board of secondary mixed cell, thereby its tube chamber is marked off at least two overcurrent pipelines; Due to the curved-surface structure of wave-shape board itself, this moment above-mentioned each overcurrent pipeline also with regard to self-assembling formation the flow section of gradual change shape, thereby also namely played for institute through turbulent flow, eddy current and even the turbulence effects of fluid, finally reach its high efficient secondary mixing purpose.

3) vertical clapboard that, relies on plate face and the dead in line of secondary mixed cell to arrange, guaranteed the gradually changeable of the flow section of each wave-shape board region, between the two the flow section that has caused when having avoided the excessive or twice wave-shape board of a certain flow section parallel each other each other is without the generation of the situations such as gradual change; Rely on the zone isolation effect of vertical clapboard, to guarantee for the high efficiency shunting of mixed liquor and evenly to mix purpose.

4), detachable secondary mixed cell, be itself the abrasiveness of having considered when permanent the use; Rely on its its spray detachable cooperation between shower nozzle with water, obviously more convenient when carrying out later maintenance and changing operation, thus be conducive to promote its actual serviceability.

5), the medicament feeding pipe presents the axially symmetric structure that sprays the shower nozzle axis with respect to water, thereby the gas pressure that its tube chamber jet is subject to reaches unanimity, the frame mode that symmetry is used as medicine is conducive to stabilize water and sprays the interior fluid motion of shower nozzle, the even contact that also helps simultaneously emulsified agent and fluid is with the mixed effect of final its mixed liquor of lifting.

6), abandoned traditional dish atomization structure that hazes, consider the kinetic energy that spray regime produces, holding tank and even ring-type overflow groove structure are set herein again, the enter material way of dependence employing center pan feeding, the overflow of ring side, thereby played the purpose of its fluid dynamic energy of reduction of many echelons, thereby guarantee that stable overflow that mixed emulsion can remain certain flow rate to coal slurry place, below, also guarantees to form certain discharge height simultaneously all the time; Coal slurry collisional mixing after medicament mixed liquor and dilution finally participates in the subsequent treatment operation, and its overall work is reliable and stable; In addition, the injecting type charging of its flotation agent does not need pursuit full-closed environment deliberately 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 play in good time purpose of appraisals for falling each parts and coal slurry and flotation agent admixture in case, the operation intuitive is higher, thereby is the good prerequisite of coal slurry high-efficiency pretreatment creation.

Description of drawings

Fig. 1 is use view of the present utility model;

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

Fig. 3 is the package assembly schematic diagram that water sprays shower nozzle, secondary mixed cell and anemostat;

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.

The specific embodiment

The below is described as follows concrete part of the present utility model more by reference to the accompanying drawings:

The utility model is drawn 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, and make the shortcoming that the operator can't facilities for observation internal work situation, adopt the water of unique texture to spray the emulsifier emulsified agent, reach on the one hand the effect of dispersion and emulsion medicament, whole work system is opened wide the operator, the operator can know the working condition of understanding equipment, handled easily.use for reference tradition and fallen in case each slide plate with the bank bar to thick in coal slurry, 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, design " people " font and divided material unit, thereby realized thick in coal slurry, fine-graded classification purpose, concrete coal slurry, the flow direction of flotation agent and emulsion and even mixture slurry is as shown in the dotted arrow in Fig. 1-3, thick with further increasing, fine fraction is the difference on the time of staying in preprocessor, eliminate the impact 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 high ash content that need not to extract in floating operation reduces it to the flotation agent adhesive capacity as far as possible, thereby for good process conditions are created in the coal slurry pretreatment, the follow-up flotation quality of final assurance.

Specifically describe:

1.1 the design of casing

The casing that the utility model is designed is not the simple body structure of indiscriminately imitating the serial ore pulp preprocessor of traditional XK and tradition atomizing-fall type coal paste preprocessor, but considers the coal slime floating process factor comprehensively, improves.

(1), the design of feed box

Feed box is also that the whole design of material feeding box of coal slurry feeder is being fallen above a side of box body, and as shown in Figure 2, feed box central tube A is the ore pulp feeding pipe, and both sides are clear water pipe B.The design takes into full account from technique, with before emulsified agent contacts, first 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 that falls of the present utility model is cylindrical box, top is emulsification and charging space, for guaranteeing all even pipe arrangements that facilitates in factory building of charging, thereby has adopted the enter material way of center pan feeding, the overflow of ring side; For guaranteeing to be provided with diaphragm plate along the even overflow purpose of the coal slurry feeder overflow wall of annular overflow trough shape in its overflow launder, on diaphragm plate, 7 of the apertures of uniform Φ 300mm are to form intercommunicating pore; The overflow wall height of coal slurry feeder is 100mm, and is stable to keep out-feed liquid stream.

(3), emulsified agent case

The emulsified agent case, be also that the box body upper inside is being fallen in cylindric holding tank 40 designs of the present utility model of aforesaid formation, be cylindrical shape, 7 hole roads 41 that are communicated with ring-type overflow launder 50 vallecular cavities and holding tank 40 vallecular cavities with formation of the aperture of the uniform Φ 100mm of surrounding, outer annular overflow launder 50 height 230mm, stable to keep out-feed liquid stream, but the while is the certain discharge height of self-assembling formation also, collisional mixing on the superiors' slide plate of coal slurry in falling box body after medicament emulsion and dilution, and advance in the downslide path that finally consists of along slide plate.

1.2 reagent emulsifying system

The utility model employing reagent emulsifying system can disperse to cut medicament on the one hand, forms 5～20 little oil droplets of μ m, to form emulsion; On the other hand, adopt emulsification spraying system of the present utility model 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 is also that water injection shower nozzle 10 is that a kind of water sprays emulsifier, but be not the structure of indiscriminately imitating traditional water ejector, but for operating position, improve: certain pressure clear water enters from its water liquid feed end, spray from its inwardly projecting orifice with 15m/s speed, form negative pressure in the spray chamber of water injection shower nozzle 10, thereby with the medicament feeding pipe 13 suction spray chambers of medicament from both sides, medicament is dispersed into 5～20 little oil droplets of μ m by high speed water jet impact and cutting with it, to form emulsion; This moment, the processing for its emulsion not yet finished, and emulsion still needs again to enter the waveform mixed plate group place of secondary mixed cell 20 afterwards, again fully mixed and disperseed, and discharged at last again.

Reagent emulsifying device design feature:

1), medicament feeding pipe 13 presents the axially symmetric structure that sprays shower nozzle 10 axis with respect to water; The gas pressure that inner jet is subject to reaches unanimity, and is conducive to the stabilized fluid motion, also helps the even contact of medicament and fluid simultaneously.

2), as shown in Fig. 4-5, there is a vertical baffle to consist of vertical clapboard 22 in secondary mixed cell 20 tube chambers, both sides have two waveform baffle plates to form wave-shape board 21, thereby the hybrid loop zone of its tube chamber is divided into four zones, when emulsion disperses the little oil droplet of formation to pass through this secondary mixed cell 20, again cut apart and alter course and produce as turbulent flow, eddy current and even turbulent flow etc., being cut apart oil droplet and water liquid mixing purpose further to reach; Certainly, also can carry out the zone division of other numbers according to on-site situation when reality is used, much more no longer the effect that only need play its turbulent flow, eddy current and even turbulence 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, the case internal layer is stacked arranges seven layers of slide plate successively falling, and the angle of the plate face of every layer of slide plate and horizontal plane is 8 °; It is with being intended to: allow the flow velocity of coal slurry on slide plate keep suitable speed, both guaranteed the incorporation time of coal slurry and flotation agent, guaranteed again larger treating capacity, the height of equipment, also be unlikely to excessive simultaneously.

(2), in seven layers of slide plate, be followed successively by from top to bottom one, two, three, four, five, six, seven layer of definition, three bank bars wherein are installed on one, two, three, five layer of slide plate, four, six, seven layers upper installs four bank bars.The bank sliver transvers section is trapezoidal, upper bottom width 10mm, lower bottom width 25mm, and high 20mm adopts the high molecular abrasion-proof material to make.Bank is connected with slide plate 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 Figure 1, set up between arbitrary base of minute material unit and lower floor's slide plate plate face and consist of guiding and hang down the passage that the ash content coarse granule is advanced, the plate side at corresponding its another place, base consists of the zone of falling of the thin mud of high ash content naturally, the thin mud of high ash content specifies number slide plate and reduces it and the adhesive capacity of flotation agent so that can directly be crossed over, can regulate the relative position that falls the inner minute material unit of case and slide plate and can realize accurate location for minute 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 minute material unit, in the utility model, " people " font divides the height-adjustable structure that material unit consists of, can play more easily the coarse grained purpose of upper strata fine grained and lower floor in the shunting coal slurry, fine grained is also 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 is also that the low ash content raw granulate fraction in coal slurry must successively glide through seven layers of slide plate in falling box body successively, fine grained only needs through three layers of slide plate in falling box body, 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 water through valve C, flowmeter D and sprays shower nozzle 11, forms high-speed jet in the exit of built-in (operating) water nozzle 12; Due to the swabbing action of jet, the inner chamber that sprays shower nozzle 10 at water is also that spray chamber forms negative pressure, and medicament is dispersed into 5～20 little oil droplets of μ m by high speed water jet impact and cutting with it after the entrance suction spray chamber of both sides, form emulsion; The secondary mixed cell 20 that emulsion enters the bottom of water injection shower nozzle 10 again fully mixes and disperses, and discharges and finally drops down onto in the holding tank 40 of its underpart by exporting at last, finally flows into ring-type overflow launders 50 and overflows via holding tank 40.For guaranteeing that water sprays shower nozzle 10 and is unlikely to holding tank 40 bottom lands are produced the impact wear phenomenons when permanent the use, can expect protection to it by setting in advance wearing plate 60 measures such as wear Protection such as grade.

Simultaneously more as shown in Figure 1, coal slurry enters annular overflow trough shape coal slurry feeder E through feed box, evenly spilling into ground floor along its overflow wall is also on the superiors' slide plate, the medicament emulsion collisional mixing that overflows with the utility model, be mixed with the coal slurry of flotation agent by the bank bar F on the ground floor slide plate, jump up continuously and fall, making coal slurry fully mix with emulsified agent, entering flotation device until discharge from bottom half.Low ash content coarse granule is close to skateboarding and is subjected to stopping of bank bar, and movement velocity is slow, and pretreatment time is long, impels it surperficially can adhere to enough and stable oil film, can adhere to quickly bubble floating after entering flotation device.High-ash thin mud is with the upper strata water movement, movement velocity is fast, " people " font first, the 4th layer of slide plate place's setting divides under the effect of material unit G 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 adsorption, just slowed down their flotation speed in flotation device, farthest alleviate the thin mud of high ash content to the pollution of floatation clean coal; Low ash content coarse granule is successively covered the plate face of whole slide plates, the floating agent that disperses has the sufficient time, can wrap up fully well being mixed on low ash content coarse granule, forms comparatively stable oil film, thereby improve its hydrophobicity, finally provide Reliable guarantee for follow-up floating operation.

Claims (10)

1. the flotation agent feed system based on fall type coal paste preprocessor, comprise the water injection shower nozzle (10) that mixes be used to carrying out water liquid and flotation agent at least, and it is characterized in that: described flotation agent feed system also comprises secondary mixed cell (20); Affixed layout between the mixture export of described secondary mixed cell (20) liquid feeding end and water injection shower nozzle (10), the flow section on secondary mixed cell (20) are the variable cross-section structure.

2. flotation agent feed system according to claim 1, it is characterized in that: described secondary mixed cell (20) profile is cannula-like, be furnished with more than one wave-shape board (21) in its tube chamber, the formed crestal line of ridge shape crest of described wave-shape board (21) is vertical or intersect at the setting of mixed liquor descent path.

3. flotation agent feed system according to claim 2, it is characterized in that: the formed crestal line of ridge shape crest and the mixed liquor descent path of described wave-shape board (21) are arranged vertically, and described wave-shape board (21) is two and is arranged symmetrically with along secondary mixed cell (20) axis shaft.

4. flotation agent feed system according to claim 3, it is characterized in that: secondary mixed cell (20) also comprises the vertical clapboard (22) that is two symmetrical half cylindrical cavities with its tube chamber subdivision that is arranged in its tube chamber place, and described two wave-shape boards (21) are symmetrically arranged in vertical clapboard (22) plate body both sides.

5. according to claim 1 and 2 or 3 or 4 described flotation agent feed systems, it is characterized in that: secondary mixed cell (20) port of export place is furnished with bell mouth shape anemostat (30), the small-caliber end of this anemostat (30) and the affixed setting of secondary mixed cell (20) port of export.

6. according to claim 1 and 2 or 3 or 4 described flotation agent feed systems is characterized in that: described secondary mixed cell (20) sprays with water and is detachable the cooperation between shower nozzle (10).

7. according to claim 1 and 2 or 3 or 4 described flotation agent feed systems, it is characterized in that: described water sprays shower nozzle (10) and is negative pressure injecting type structure, comprise exterior tubular body (11) and be arranged at the interior built-in (operating) water nozzle (12) of exterior tubular body (11), described built-in (operating) water nozzle (12) is between hollow frustum and its outer wall and exterior tubular body (11) inwall and forms spray chamber, and water sprays that the exterior tubular body (11) of shower nozzle (10) is upper is arranged symmetrically with along its axis the medicament feeding pipe (13) that at least one pair of is communicated with its spray chamber; Water injection shower nozzle (10) upper end consists of water liquid feed end, and the aperture, lower end that water sprays shower nozzle (10) consists of mixture export.

8. according to claim 1 and 2 or 3 or 4 described flotation agent feed systems, it is characterized in that: the flotation agent feed system also comprises the holding tank (40) that is arranged in secondary mixed cell (20) below place, and holding tank (40) outer wall place is provided with ring-type overflow launder (50); Ring-type overflow launder (50) inwall consists of the cell wall of cylindric holding tank (40), and its outer wall consists of overflow wall, and the overflow route of ring-type overflow launder (50) and coal slurry travel path intersect to be arranged; Offer on holding tank (40) cell wall for the Kong Lu (41) that is communicated with ring-type overflow launder (50) vallecular cavity and holding tank (40) vallecular cavity.

9. flotation agent feed system according to claim 8 is characterized in that: described Kong Lu (41) is seven and along the circumferential uniform setting of holding tank (40) cell wall.

10. flotation agent feed system according to claim 8 is characterized in that: described holding tank (40) is provided with wearing plate (60) at the port of export of secondary mixed cell (20) bottom land place pointed.

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