CN1004991B - Method and apparatus for continuously mixing and kneading pulverulent bodies such as pulverized coal - Google Patents

Abstract

A method of continuously mixing and kneading pulverulent bodies such as pulverized coal, oil coke to prepare a slurry thereof. Pulverulent bodies supplied continuously at a fixed rate from a supply tube are spattered and dispersed by a rotary mixing disk rotating in a mixing chamber covered with a base plate. A flow of a main liquid is directed as an annular overflow film downward along an overflow tube to the spattered and dispersed pulverulent bodies while a small amount of liquid such as additives is injected from a plurality of nozzles. The pulverulent bodies are uniformly humidified with a plurality of upper surface scrapers provided on the rotary mixing disk and disposed to cross the injection nozzle ports as the rotary mixing disk rotates and side face scrapers provided on the rotary mixing disk and turning along the inner wall of the mixing chamber. The pulverulent bodies are then collected to the center of the mixing chamber with a collecting blade, to be supplied to the next mixing and kneading chamber and dispersed centrifugally by a rotary mixing and kneading disk rotating in the mixing and kneading chamber while being mixed and kneaded by fixed mixing and kneading pins disposed on the upper wall of the mixing and kneading chamber and movable mixing and kneading pins planted in the rotary mixing and kneading disk. Finally, the mixed and kneaded pulverulent bodies are directed to a discharge port by a mixing and kneading type scraper blade provided on the rotary mixing and kneading disk.

Description

The method and apparatus for preparing the cream slurry by continuous mixing and the fine coal of kneading, oil coke one quasi-soridium

The present invention relates to a kind of like this method and apparatus, be used for mixing continuously and fine coal, oil coke one quasi-soridium kneading and provide by fixed amount, by prepare cream slurry, more particularly, relate to so continuous mixing and knead method and apparatus, can knead into the thixotroping attitude to coccoid, and under granular attitude (original granular attitude), make it moistening.

In traditional technology, when moistening, mix and when kneading coccoid without interruption, the problem with difficulty of crucial importance is moistening equably this quasi-soridium how, and which type of they are mixed by and kneads system.

The optimal device that we once proposed a kind of method for continuously mixing and implemented this kind method, wherein, make liquid with under a kind of annular overflow laminar flow, and by fixed amount coccoid without interruption, then when making it with a kind of rotation mixing pan (for example patent publication No. is: in the applications such as clear 48-22511, clear 53-38828, clear 55-32755 and clear 57-9844 disclosed like that) to mix, will scatter and collide with liquid with aforesaid liquid.Yet, in the time will making the cream slurry to fine coal and oil coke one quasi-soridium, just must have a kind of can guarantee to mix with knead more sufficient the mixing and the system of kneading.

In the general equipment of the existing mixing and the coccoid of kneading, include moistening equipment fully, and independently repeat to mix and the equipment of kneading with it by a collection of mixing and kneading unit.

Above-mentioned repeating mix with the legacy equipment kneaded in, be to need many mixing and kneading unit.Like this, the mass transport speed between these devices will change, and the quality of material also can variation, thereby will have to invest aforementioned means can be avoided on the equipment of the sort of velocity variations and deterioration.

The present invention's purpose is to provide the method for a kind of continuous mixing and kneading, and the equipment of implementing this kind method, prepare the cream slurry in order to coccoid from fine coal, oil coke and so on, overcome those above-mentioned shortcomings simultaneously, and this type of can be evenly moistening under granular attitude (original granular attitude) by fixed amount body of powder without interruption, under the swelling state, collect and deliver to and mix and the system of kneading, this quasi-soridium then can be prolonged as much as possible by this mixing and the time of system of kneading, borrowed material by the time shearing force make it fully to mix and knead.

Prepare the continuous mixing and kneading method of cream slurry from fine coal, oil coke one quasi-soridium according to of the present invention, coccoid from feeder sleeve 10 fixed amounts without interruption, sprinkled by a rotation mixing pan 3 and to loose and be distributed, this mixing pan is to rotate in a mixing chamber 1 that is covered by substrate 2.Main liquid wherein can be along an outflow pipe 25, overflow layer form with ring-type is dirty, the outflow pipe is inverted conical shape with respect to the above-mentioned coccoid that looses with distributing that sprinkles, a spot of for example additive one class I liquid I is then by a collection of nozzle 4,4 ejections, with moistening this quasi-soridium equably, use a collection of upper surface scraper plate 5 this moment, the latter is arranged on the aforesaid rotation mixing pan 3, and be placed in the position of this jet hole of crosscut when this disk rotates, on the mixing pan 3 of this rotation, also be provided with a collection of side scraper plate 7, they rotate along the inwall of above-mentioned mixing chamber, these coccoids are then collected central part by the shovel that gathers materials, and then supply with the mixing and the kneading compartment 6 of next station, mixing and kneading disc 9 by a rotation in chamber 6 scatter eccentrically, simultaneously by the fixed mixing that is arranged on chamber 6 upper walls with knead pin 11, and mixed with the pin 12 of kneading and kneaded by being implanted in movable mixing in the dish 9, the mixing in being installed on dish 9 and the type scraper plate 13 of kneading are from discharge gate 14 discharges then.

In addition, continuous mixing of the present invention also includes with the equipment of kneading: the mixing chamber 1 that substrate 2 covers, and one by the supply pipe 10 of the device of fixed amount supply etc., is used for supplying continuously quantitative coccoid; Be installed in the rotation mixing pan 3 in the mixing chamber 1, be used for sprinkling and loose and the coccoid that distributes and supply with by feeder sleeve 10; Be installed in the back taper outflow pipe 25 of central portion on this mixing chamber, can be with respect to this bold and vigorous coccoid that looses and distribute by flowing out main liquid under the annular outer fluid layer form; A collection of nozzle 4,4, be used for respect to above-mentioned sprinkle to loose eject the liquid of a spot of, for example additive and so on again with the coccoid that distributes; A collection of upper surface scraper plate 5 is arranged on the rotation mixing pan 3, and when this dish rotated, this scraper plate was in the position of this jet hole of crosscut; Be arranged on the side scraper plate 7 on this rotation mixing pan 3, it rotates along the inwall of above-mentioned mixing chamber; Be positioned at the shovel board 8 of this mixing chamber 1 bottom, be used for coccoid is collected central part, be arranged on the mixing and the kneading compartment 6 of this next station of mixing chamber, process mixing chamber 1 moistening coccoid with supply scatter eccentrically by rotation mixing in chamber 6 and kneading disc 9; Be installed in the fixed mixing of upper wall in the chamber 6 and the pin 11 of kneading; Be implanted in the movable mixing in the dish 9 and the pin 12 of kneading; And be installed in the mixing of dish in 9 and knead type scraper plate 13, the latter will mix and the powdery kneaded drains into discharge gate 14.

This rotates mixing pan 3 with high speed rotating in mixing chamber 1, the coccoid of supplying with continuously by fixed amount from feeder sleeve 10 is sprinkled loose when being distributed, the main liquid of being supplied with by pipeline 23 then enters in the liquid chamber 24, and the main liquid that overflows is just dirty along the overflow pipe 25 of back taper, and eject the liquid of minor amounts of additives and so on from nozzle 4,4.Then, along with the rotation of rotation mixing pan 3, upper surface scraper plate 5 turns to crosscut and ejiction opening 4a, side scraper plate 7 revolutions simultaneously, by the effect of these scraper plates, make aforesaid liquid be able to moistening equably having sprinkled and loose and the coccoid under the primary granule state that is distributed.Collect moistening in a manner described coccoid with the shovel board 8 of gathering materials that is installed on mixing chamber 1 bottom, be used for sequentially supplying with the mixing and the kneading chamber 6 of next station from central blanking port 16.

In the above process of gathering materials, the powdery pellet is by humidification and swelling.Mix with kneading compartment 6 in, this rotary mixing and kneading disc 9 be with high speed rotating, the coccoid of answering from the whereabouts confession then coils 9 effect whereby and scatter.Owing to fixed and movable mixing is arranged and kneads pin 11 and 12, intercalation is in the upper wall and dish 9 of chamber 6 respectively, just can rely on this kind coccoid to arrive the shearing force that produces in the 6 bottom processes of chamber by above-mentioned pin, make the powdery physical efficiency can sprinkle diffusing, distribution, moistening, mix union and hold together, supply in mixing and the kneading compartment, sprinkle again with the system of kneading by this mixing then and loose, mix, knead, scrape collection and discharge.Like this, the time used by this complete equipment is prolonged as much as possible, removes this, and this complete equipment itself then can be prepared into compact form.

Above-mentioned purpose of the present invention and other purpose and characteristics in conjunction with the following detailed description that the accompanying drawing of embodiment is done, can be understood.

Below appended figure illustrated, prepare cream when slurry from fine coal, oil coke one quasi-soridium, be used for implementing the equipment of the continuous mixing of being adopted and the method for kneading; Wherein,

Fig. 1 is the profilograph of this equipment;

Fig. 2 is the side view of this equipment;

Fig. 3 is the plane of this equipment;

Fig. 4 is the profile along Figure 1A-A line;

Fig. 5 is the profile along Figure 1B-B line; And

Fig. 6 is the profile that shows another example structure.

Mixing chamber 1 shape has base plate 22 as a drum 21, above central authorities of housing the substrate 2 of circular hole 2a is arranged.There is a material-dropping hole 16 in the central authorities of base plate 22.In the following station side of mixing chamber 1, a housing 15 of being made up of columnar portion 15a and the conus portion 15b that is connected to its bottom is installed, inner formation one is mixed and kneading compartment 6.A side has a discharge gate 14 under this mixing and kneading compartment 6.Axle 17 is vertically passed and is mixed and kneading compartment 6 and mixing chamber 1 by bearing 18 supportings, by doing rotation at a high speed with pulley concial disk or other drive unit that it directly links to each other.Be equipped with one in the mixing chamber 1 and be fixed on the rotary mixing pan of axle on 17, mix with kneading compartment 6 in then be equipped with rotary a mixing and kneading disk 9 that is fixed on the axle 17.For example, be connected to the device (not showing bright) of that the present inventor is developed, as to be used for supplying continuously fixed amount coccoid one class material with feeder sleeve 10, this a certain amount of coccoid then is to deliver to rotary mixing pan 3 continuously from said apparatus, and sprinkles therefrom and lean on the ground mixing and knead into the thixotroping attitude.The mixing of 6 bottoms rotation and the type scraper plate 13 of kneading in the chamber are then discharged the cream of above-mentioned coccoid slurry from discharge gate 14.

In the said equipment, wetting system and mixing and kneading set of systems are dressed up the double form, make powdery physical efficiency in the mixing chamber by moistening and hybrid system, sprinkle loose, distribution, humidification, mixing and collection hold together, mix and kneading compartment and supply with, here, powder-material is again by disperseing, mix, knead, scrape and discharging.Coccoid can prolong as much as possible by the time of this equipment, and this equipment itself then can be made compact form.If this mix with the system of kneading in mix and act on insufficiently with kneading, the more system of multistation can be set in case of necessity.

The continuous mixing for preparing the cream slurry according to the quasi-soridium from fine coal, oil coke of the present invention and the method for kneading, press fixed amount coccoid without interruption from feeder sleeve 10, the rotary mixing pan 3 that rotates by mixing chamber 1 high speed sprinkles and looses and be distributed, simultaneously, main liquid is then dirty along Overflow Cone 20 according to overflow layer form, ejects the small amount of liquid of additive and so in addition from nozzle 4.Then, when rotary mixing pan 3 rotated, 5 of upper surface scraper plates were rotating crosscut jet hole 4a, simultaneously, side scraper plate 7 also turns round, and the effect by these scraper plates makes aforesaid liquid mix with the coccoid that is distributed with sprinkling to loose, and the moistening one-tenth primary particles of this kind coccoid state.The coccoid of moistening like this mistake is drawn in by the shovel 8 that gathers materials that is installed in mixing chamber 1 bottom, supply with the mixing and the kneading compartment 6 of next station in turn through central blanking port 16, be able in this gathers materials process humidification and this kind of swelling powdery pellet equably.

Supply with the coccoid that mixes with kneading compartment 6 from blanking port 16, disperse by the mixing of rotation and the effect of kneading disc 9, by the fixed mixing that is installed in chamber 6 upper walls with knead pin 11 and be assemblied in movable mixing and the pin 12 of kneading in this dish, mixed and kneading, the shearing force that when planting coccoid thus, produces by above-mentioned pin between cog, mix reliably and knead into the thixotroping attitude, become the cream slurry and discharge from discharge gate 14.

Wetting system and the mixing and the system of kneading of double form be equipped with in the continuous mixing of the present invention and the method for kneading.Coccoid in the mixing chamber looses by this moistening and hybrid system and is distributed.Loose and the coccoid that is distributed for main liquid being supplied with sprinkle, surperficial central configuration has an Overflow Cone 20 on substrate 2, makes this main liquid dirty with the ring-type overflow type along an overflow pipe 25.Remove this, many nozzles 4,4 are installed on substrate 2 symmetrically, by the liquid of their ejection minor amounts of additives one classes, jet hole 4a and mixing chamber are adjacent.Can also inject the liquid identical by nozzle 4 according to the cream pulpous state attitude of drawing up and being equipped with, coccoid is adjusted to suitable moistening degree, also can Overflow Cone 20 supply with the inside that washing agent cleans said apparatus with main liquid.The effect of this Overflow Cone 20 is, make the main liquid of supplying with from pipeline 23 enter the liquid chamber 24, and make the main liquid ring overflow layer form that overflows dirty along the overflow pipe 25 of back taper, make it to collide by revolving mixing pan 3, mixed equably with moistening with sprinkling the coccoid that looses and be distributed.For the liquid condition of supplying with above-mentioned Overflow Cone 20, nature can be provided by various ways, and for example patent publication No. is: bright shown in the clear 57-9844, then multiple main liquid is mixed.

On rotary mixing pan, radially be provided with a collection of upper surface scraper plate 5(and be three in the present embodiment by the angle of circumference that equates), when this rotary mixing pan rotates, crosscut jet hole 4a, and and then strike off the coccoid that is attached on substrate 2 internal faces.On the periphery of this mixing pan 3, some (in the present embodiment being three) side scraper plate 7 also radially is installed, when turning round, it wipes the coccoid on the mixing chamber inwall off.In addition, the situation according to using is inserted with a collection of hybrid pin 26 in the upper surface of rotary mixing pan 3.

Bottom at mixing chamber 1, promptly on base plate 22, dispose the shovel 8 that gathers materials in a collection of (in this example being three) L shaped cross section on the surface, be used for drawing moistening coccoid in center, the coccoid of collection fallen, and supply to mixing and kneading compartment 6 through blanking port 16.Upper wall in this chamber 6, promptly at the lower surface of base plate 22, intercalation has many fixed mixing and kneads pin 11, and surperficial on revolving mixing and kneading disc 9, then be inserted with a collection of movable pin 12, the residing position of the latter makes it by fixed mixing and kneads between the pin 11.Remove this, the bottom parts 27 that has tapered portion 27a is installed in the bottom of aforementioned tapering 15b, and the bottom of mixing and kneading compartment 6, then tapering 15b and 27a constitute a paddy shape thus, and blanking port 14 then is formed in the part of above-mentioned tapered portion 15b.Be installed in mixing and knead type scraper plate 13 on rotary mixing and kneading disc 9 lower surfaces, corresponding at the bottom of the paddy shape of the profile of its lower end and above-mentioned chamber 6.

In addition, the mixing of single station and the system of kneading have been described in Fig. 1 and the structure shown in Figure 2, and according to the coccoid or the cream pulpous state attitude of drawing up and being equipped with, also can provide the multistation mixing shown in Figure 6 and the system of kneading naturally.

Below with the continuous mixing of the present invention and the method for kneading, the example of operation of edition with parallel text equipment is described.Press fixed amount coccoid without interruption from feeder sleeve, rotate in mixing chamber 1 high speed, and quilt sprinkles diffusing and is distributed by rotary mixing pan 3.From the main liquid of the overflow pipe 25 of Overflow Cone 20, flowing to coccoid under the ring-type overflow layer form, and collide with it and a kind of uniform mixture is provided.Simultaneously, liquid with minor amounts of additives and so on, get spray pattern from the nozzle 4 of balanced configuration in mixing chamber 1,4 ejections, by the upper surface scraper plate 5 of setting on the rotary mixing pan 3 and the effect of side scraper plate 7, this kind liquid is evenly mixed with the coccoid that is distributed with sprinkling to loose, make this mixed shape body be able under original granular attitude moistening.Collect moistening in a manner described coccoid by the shovel 8 that gathers materials that is arranged on mixing chamber 3 bottoms then, and sequentially be supplied to the mixing and the kneading compartment 6 of next station by central blanking port 16.In this gathered materials process, powdered granule obtained uniform humidification and swelling.

Revolving mixing and kneading disc 9 with at a high speed mixes with kneading compartment 6 in rotate, then borrow the mixing of rotation and kneading disc 9 and dispersion eccentrically from the moistening coccoid of blanking port 16 supplies.Because fixed mixing and pin 11 and movable the mixing and the pin of kneading of kneading are arranged, be installed in the upper wall portions of above-mentioned chamber 6 and above-mentioned rotating disc 9 respectively, so coccoid can be borrowed its shearing force by being produced between above-mentioned pin, and mix reliably and knead into the thixotroping attitude, then arrive the bottom of this mixing and kneading compartment.The mixing of rotating on this bottom is discharged the cream slurry of this coccoid from discharge gate 14 with 13 of the type scraper plates kneaded.

In addition, the above embodiments not only are used for preparing the cream slurry of the quasi-soridium of fine coal, oil coke, also can be used for other coccoid moistening, mix and knead.

Claims (21)

1, mix continuously and knead fine coal, oil coke one quasi-soridium, by a kind of method for preparing the cream slurry, comprise following each operation:

By a rotary mixing pan 3, will be sprinkled from the coccoid that feeder sleeve 10 is supplied with continuously by fixed amount and loose and be distributed to rotate in the topped mixing chamber 1 of substrate 2;

Can loose and the coccoid that is distributed along an overflow pipe 25 dirty extremely above-mentioned sprinkling with main liquid as a kind of ring-type overflow layer;

Inject the small amount of liquid of additive and so on from a collection of nozzle 4,4;

By the moistening equably coccoid of a collection of upper surface scraper plate 5 that is arranged on the rotary mixing pan 3, the residing position of this kind scraper plate is when above-mentioned rotary mixing pan rotates, the oral area of the aforesaid nozzle of crosscut, also be provided with side scraper plate 7 on this rotary mixing pan 3, they are the wall revolution within the mixing chamber of addressing;

By the shovel 8 that gathers materials moistening coccoid collection held together to central part, prepare the mixing and the kneading compartment 6 of next station of supply;

By mix with kneading compartment 6 in rotation mix and kneading disc 9 disperses coccoid eccentrically, mixed and kneading by fixed mixing that is installed in 6 tops, chamber and movable mixing of kneading pin and assign in the dish 9 simultaneously with the pin of kneading, through being installed in the mixing on this dish 9 and the type scraper plate 13 of kneading, it is discharged by discharge gate 14 then.

2, prepare a kind of continuous mixing and the equipment of kneading of cream slurry by fine coal, oil coke one quasi-soridium, comprising:

A mixing chamber 1, topped with substrate 2;

Be connected to the feeder sleeve 10 on a quantitative supply device or the same device, be used for supplying continuously the coccoid of fixed amount;

Be installed in the rotary mixing pan 3 in the mixing chamber 1, be used for sprinkling and loose and the coccoid that is distributed by feeder sleeve 10 supplies;

Be installed in the back taper overflow pipe 25 of going up central portion in the above-mentioned mixing chamber, be used for making main liquid to loose and the coccoid that is distributed to flow under a kind of ring-type overflow layer form to sprinkle;

A collection of nozzle 4,4, be used for the liquid spray of minor amounts of additives and so on to sprinkle loose with the coccoid that is distributed on;

A collection of upper surface scraper plate 5 is arranged on the above-mentioned rotary mixing pan 3, and when this rotary mixing pan rotates, is positioned at the oral area of crosscut said nozzle;

Be installed in the side scraper plate 7 on the rotary mixing pan 3, it is along the inwall revolution of this mixing chamber;

Be installed in the shovel 8 that gathers materials on mixing chamber 1 bottom, be used for coccoid is collected central part;

Be arranged under the above-mentioned mixing chamber mixing and kneading compartment 6 on the station;

Be arranged on rotary the mixing and kneading disc 9 in this mixing and the kneading compartment 6, be used for the moistening coccoid that mixing chamber 1 is supplied with is scatter eccentrically;

Be installed in mix with kneading compartment 6 upper wall portions on fixed the mixing and the pin 11 of kneading;

Being installed in movable in rotary mixing and the kneading disc 9 mixes and kneads pin 12; And

One mixes and the type scraper plate 13 of kneading, and is installed on rotary mixing and the kneading disc 9, is used for the coccoid that mixes Yu knead is disposed to discharge gate 14.

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