CN201161183Y

CN201161183Y - Granulator

Info

Publication number: CN201161183Y
Application number: CNU2007200419218U
Authority: CN
Inventors: 谢洪清; 查协芳; 朱向华; 陈林书
Original assignee: CHANGZHOU XIANFENG DRYING EQUIPMENT Co Ltd
Current assignee: CHANGZHOU XIANFENG DRYING EQUIPMENT Co Ltd
Priority date: 2007-11-29
Filing date: 2007-11-29
Publication date: 2008-12-10
Anticipated expiration: 2017-11-29

Abstract

The utility model relates to a pelleting machine which is provided with a material inlet and a material outlet; a draught distributing chamber, a fluidizing chamber, a heating chamber, and a separating chamber are orderly arranged in a bed body from the bottom up; a plurality of exhaust ducts are arranged on the top part of the bed body, a draught distributing plate is arranged between the draught distributing chamber and the fluidizing chamber, the fluidizing chamber is provided with a plurality of gunjets which are arranged on the side face of the bed body, an inner heating chamber is also arranged between the fluidizing chamber and the separating chamber, an inner heat exchanger is arranged in the heating chamber, the exhaust ducts are connected with the outlet of a cyclone separating device for the returned material, the cyclone separating device is communicated with the material returning opening of the fluidizing chamber through a material returning pipe at the lower end of the cyclone separating device, the material returning opening is arranged on a position near the gunjet. The pelleting machine ensures that the granular material continuously circulates and returns to the bed from the material returning opening near the gunjet so as to get more coating chances, the obtained product has good onion-shaped structure, and the finished product has homogeneous granularity and can be put in continuous mass production.

Description

A kind of comminutor

Technical field

The utility model relates to a kind of comminutor, is the device to crystal grain or parent nucleus enforcement bed spray coating pelletizing.

Background technology

The fluidized bed prilling drying machine is to be used for crystal grain or parent nucleus are implemented the bed spray coating pelletizing; to obtain the Granulation Equipments of coating type coated granule product, be widely used in the granulation and the drying of materials such as industry graininess, sheets such as chemical industry, oil, feed and thermosensitive type material.

At present, according to the difference of gas flow and granulation principle, the fluidized bed prilling drying machine generally is divided into following several:

1, the even granulating coated technology of ebullated bed of air-flow vertically upward;

2, the granulating coated technology of cyclone bed of rotation updraft;

3, the granulating coated technology of the coefficient revolving bed of updraft and rotating disc;

4, the granulating coated technology of spouted bed of inhomogeneous air-flow vertically upward (promptly spouted);

5, the granulating coated technology of the coefficient multiple-hearth of updraft and downdraught;

6, combining vertically upward, air-flow, aggregative fluidization motion are master, fine powder returning charge, break up the continuous fluidized bed of cutter combination, internal heater combination.

More than every kind of technology its corresponding limitation is all arranged: as the 1st and the 5th kind of technology can't obtain spherical particle; The 2nd and the sphericity of the 3rd kind of technology best, but can not realize continuous production in enormous quantities, have mass discrepancy between batch.The fine grained that above continuous fluidized bed outlet contains is more, and the particle circularity is bad.The 6th kind of technology can obtain spherical particle continuously, but bed body size is bigger, and breaks up cutter and easily produce static, and the danger of blasting also can be disturbed spraying area work, causes the solid degree of product not high.Above-mentioned the 4th kind of technology is because spouted reason needs the bed body to have very high height, and the split-wind plate complexity, and the average operation wind speed of fluidisation bed surface is little, the energy consumption maximum.

Also there is following common shortcoming in 6 kinds of above-mentioned technology:

(1) when material bed internal spraying, spray gun is easily stifled, and single spray gun discharge rate is too small.

(2) above-mentioned technology is the fine powder returning charge, and refeed line easily stops up, and material particles circulatory motion ratio is on the low side.

(3) there is heat utilization ratio problem on the low side.

In a word, above-mentioned technology all can not reach with relatively little bed body, low energy consumption, and is stable, safe from having certain density raw material mother liquor, directly realizes the production in enormous quantities of continuous spherical particle.

The utility model content

The purpose of this utility model is to propose a kind of comminutor, and this granulation function reaches stable, safe operation with less bed body, and simple in structure, energy consumption is low, directly obtains large batch of, good sphericity, even-grained coated granule continuously.

This comminutor is provided with charging aperture; discharging opening; be followed successively by separating chamber from bottom to top in the bed body; fluidising chamber; heating clamber; the separation chamber; the top of bed body is provided with a plurality of exhaust ducts; be provided with split-wind plate between separating chamber and the fluidising chamber; fluidising chamber is equipped with many spray guns; spray gun is installed in the side of a body; also be provided with interior heating clamber between fluidising chamber and the separation chamber; be provided with interior heat exchanger in the heating clamber; said exhaust duct links to each other with the import of returning charge cyclone separator; cyclone separator communicates with the returning charge mouth of fluidising chamber by the refeed line of lower end, and said each returning charge mouth is arranged on the position near spray gun.

Further improvement of the utility model is:

The bed body was provided with the selection by winnowing chamber before the finished product discharging opening, selection by winnowing chamber upper and lower is respectively equipped with air-out and air intake is taken over, and the middle part is provided with the selection by winnowing net, and said discharging opening is located at the side of selection by winnowing chamber selection by winnowing net.Said selection by winnowing chamber discharge pipe feeds the separation chamber of bed body.Its effect is to make the particle less than finished product grain size directly turn back to continuation participation covering granulation process in the separation chamber, to reduce the burden of follow-up solids management system, improves the finished product uniformity.

Refeed line at the returning charge cyclone separator is provided with wind pushing mechanism; Make the wind speed in the refeed line approach the finished particle sinking speed, and make the wind direction returning charge interior of air-supply flow to consistent with entering fluosolids.Between cyclone separator and refeed line, be provided with the returning charge Blowing stopper.By simple blower structure, solved the susceptible to plugging problem of refeed line, return the material prevented from caking in the fluosolids, the granule in all right further heat cycles return movement of its hot blast.

Heat exchanger is coil exchanger or plate type heat exchanger in said, improves the utilization rate of its indoor heat, and above-mentioned interior heat exchanger also can be provided with automatic thermal source control valve, regulates heat.

Said split-wind plate is obliquely installed to discharging opening, or is furnished with the plane setting in oblique hole, can also be the step structure that gradually falls to discharging opening.When air-flow was scurried split-wind plate, had certain horizontal force, can make particle overflow on the split-wind plate to discharging opening.

Said charging aperture is located at separation chamber's one end of a body, and discharging opening is located at an other end of body fluidising chamber, and charging aperture, discharging opening are realized continous way production not on same end face.

Further improvement of the utility model is:

In the heating clamber longitudinal baffle can be set, heating clamber is divided into several unit, be provided with one group of interior heat exchanger in each unit.Dividing plate has through hole, between dividing plate and the branch wind web plate spacing is arranged.

The upper surface of said split-wind plate is established one deck and is divided the wind net.

Bed body inner plane work wind speed is 50～95% of a finished particle sinking speed; Spray gun distance above minute wind net is 100～700mm; The air line distance of returning charge mouth and spray gun is 50～500mm; The vertical open space distance of returning charge import and split-wind plate is at 50～500mm; The vertical range of split-wind plate and interior heat exchanger (being fluidising chamber's height) is 200～1400mm; The height of interior heating clamber is at 200～2000mm; The height of separation chamber is at 400～2500mm;

The indoor wind speed of selection by winnowing is near the sinking speed of finished particle, and the branch wind net percent opening of selection by winnowing chamber is 20～60%, and the spray gun that the utility model uses can be air-flowing type spray gun or stream pressure formula spray gun or pressure type spray gun.

Bed body of the present utility model is a metal structure, and bed body ground connection can effectively be eliminated the influence of static, and operation is produced safer.

Comminutor of the present utility model mainly combines even updraft, side spray spray gun, and big fluidising air velocity, granule is shuttling movement regularly, provides principle such as crystal seed to realize purpose continuously.

Consider from overall structure, of the present utility model be also advantageous in that following some:

This machine adopts laterally disposed spray gun to produce big work wind speed and the setting of internal heater in the body of horizontal gas-liquid flow, bed, makes that material particles trends towards particulate fluidization in the granulation process, is difficult for adhesion between size particles.

This machine adopts cyclone separator to guarantee that the granule material is through constantly circulation, and near the returning charge mouth being close to spray gun returns in the bed, make granule obtain more coating machine meeting, after the granule coating under the effect of big wind speed, also very little as particle diameter, can be directly up, be difficult for and the bulky grain adhesion, products obtained therefrom has good onion-like structure.Therefore, this machine directly obtains the particle of good sphericity in enormous quantities with certain density raw material mother liquor, and the particle of adding near finished product grain size moves from the trend outlet, has further reduced the difference degree of outlet grain diameter again, can produce in enormous quantities continuously.

This machine need not to break up cutter, has avoided breaing up the interference of the static and the spraying area of cutter.

Because the effect of big wind speed and particulate fluidization, make the spray gun outlet be difficult for stifled, discharge rate can be bigger in material bed for single spray gun.

Owing to adopt side spray spray gun, and in bed body bottom, material in the bed body there is the fast cooling effect, can adopt higher EAT, the acting in conjunction that adds go to bed external insulation and big fluidising air velocity, internal heater improves continuous fluidized bed slurry-spraying pelletizing device heat utilization ratio, under same heat exchange amount situation, what that housing can be done was littler, wall thickness can be done is thinner; Because heat utilization ratio improves, also improve operating efficiency simultaneously, greatly reduced follow-up production cost.

Compare with existing similar spouted bed, under same production capacity, same efficient situation, granulating and coating body of the present utility model is long-pending to be about its half, and energy consumption is lower.

In sum: granulation function of the present utility model is with less housing, simple structure, and than the energy consumption at the end, stable, safe realization directly obtains good sphericity in enormous quantities, even-grained particle continuously from certain density raw material mother liquor.

Description of drawings

Fig. 1 is the front schematic view of the utility model pelleting main machine;

Fig. 2 is that the A of the utility model pelleting main machine is to the view schematic diagram;

Fig. 3 is the pneumatic separator enlarged diagram;

Fig. 4 is the set-up mode of pelleting main machine internal partition.

Each label is represented among the figure: 1 is separating chamber, and 2 is split-wind plate, and 3 is spray gun, 4 is fluidising chamber, and 5 is interior heating clamber, and 6 is the separation chamber, 7 are the returning charge cyclone separator, and 8 are the returning charge Blowing stopper, and 9 is refeed line, 10 is wind pushing mechanism, 11 is interior heat exchanger, and 12 is the pelleting main machine air inlet, and 13 is the pelleting main machine air outlet, 14 is the selection by winnowing chamber, 15 is the import of selection by winnowing chamber, and 16 are the outlet of selection by winnowing chamber, and 17 for dividing the wind net in the selection by winnowing chamber, 18 is charging aperture, 19 is discharging opening, and 20 are the returning charge mouth, and 21 is dividing plate, 22 is the bed body, and 23 is bed body top discharge pipe.

The specific embodiment

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described in further detail.

Embodiment one: the manufacturing of lysine spherical particle

Shown in Fig. 1 to 4: separating chamber 1, branch wind net 2, fluidising chamber 4, interior heating clamber 5, separation chamber 6 connect successively in this device, are provided with selection by winnowing chamber 14, discharging opening 18 at fluidising chamber's 4 one ends; Respectively be provided with 2 spray guns 3 in fluidising chamber 4 two sides; In interior heating clamber 5, be provided with coil exchanger 11; Link to each other with the import of returning charge cyclone separator 7 in the top of fluid bed exhaust duct 23 (see figure 4)s, returning charge cyclone separator 7 is provided with Blowing stopper 8, the lower end is connected to refeed line 9, and it is other that the returning charge mouth 20 of refeed line 9 is arranged on spray gun 3; Refeed line 9 is connected to wind pushing mechanism 10.

In this device, plane punching split-wind plate adds 40 purposes segmentation wind net; Bed body plane work wind speed is 1.5～2m/s; Bed surface is of a size of long 1000mm, wide 500mm; The height 460mm of fluidising chamber; Interior heating clamber height 450mm; The height 1000mm of separation chamber; It is 12.6% that main frame divides wind net percent opening; Spray gun is 190～240mm in the online side of minute wind distance; The air line distance of returning charge import and spray gun is 50～200mm; The returning charge import is 150mm with the distance of dividing the wind net; And adopted pneumatic separator.

The granulating and coating course of work is: and from the charging aperture 19 continuous lysine crystal seeds that drop into, the spray gun 3 of fluidising chamber sprays the lysine atomized liquid in bed, and the concentration of lysine feed liquid is 30～45%.Crystal seed is by being atomized the liquid covering, being heated drying at heating clamber 5, enter separation chamber 6 subsequently, particle is the ascension state of particulate fluidization in bed body 22, its small particles enters cyclone separator 7 with top exhaust duct 23, and return in the fluidising chamber 3 from the refeed line 9 of bottom, the atomized liquid that particle is sprayed by spray gun 3 immediately is covering and growing up once more, up once more after wherein still being heated through interior heating clamber 5 less than the particle of finished product grain size, reclaim by cyclone separator 7 again and return, form the systemic circulation campaign of granule material.Near the big material particles of finished product grain size bed body 22 in one side by covering, on one side in the ascension process that makes progress, under the promotion of quilt from the wind with certain horizontal force of minute wind web plate 2,, obtain lysine spherical particle product of uniform size from discharging opening 18 to the motion of discharging opening 18 directions.Owing to adopt external returning charge cyclone separator 7, improved wind speed, realize continuous dressing, the drying under the big fluidisation attitude in the bed, isolate the process of finished particle, discharging and granule circulation returning charge.

Use the lysine particle that the utility model is made, product granularity is (0.8～1.2mm accounts for more than 98%) evenly, and the returning charge amount is less than 30%.Operation is more than 5 days continuously for this device, and working stability, safety are normally.Comprise follow-up solids management system, every dry 1 ton of water needs total power consumption 300KW approximately; 2600 kilograms of steam of heating.

Claims

1. comminutor; bed body (22) is provided with charging aperture (19); discharging opening (18); be followed successively by separating chamber (1) from bottom to top in the bed body (22); fluidising chamber (4); separation chamber (6); the top of bed body is provided with a plurality of exhaust ducts (23); be provided with split-wind plate (2) between separating chamber (1) and the fluidising chamber (4); fluidising chamber (4) is equipped with many spray guns (3); it is characterized in that spray gun (3) is installed in the side of a body (22); also be provided with interior heating clamber (5) between fluidising chamber (4) and separation chamber (6); be provided with interior heat exchanger (11) in the heating clamber (5); said exhaust duct (23) links to each other with returning charge cyclone separator (7) import; cyclone separator (7) communicates with the returning charge mouth (20) of fluidising chamber (4) by the refeed line (9) of lower end, and said each returning charge mouth (20) is arranged on the position near spray gun (3).

2. comminutor according to claim 1; it is characterized in that being provided with selection by winnowing chamber (14) before at the discharging opening (18) of said bed body; the two ends up and down of selection by winnowing chamber (14) are respectively equipped with selection by winnowing chamber outlet (16) and selection by winnowing chamber import (15); be provided with selection by winnowing net (17) between the two, selection by winnowing chamber outlet (16) feeds separation chamber (6).

3. comminutor according to claim 1 is characterized in that being provided with wind pushing mechanism (10) in refeed line (9) top of returning charge cyclone separator (7), is provided with returning charge Blowing stopper (8) between cyclone separator and the refeed line.

4. comminutor according to claim 1 is characterized in that said interior heat exchanger (11) adopts coil exchanger or plate type heat exchanger.

5. comminutor according to claim 1 is characterized in that interior heat exchanger (11) has automatic thermal source control valve.

6. continuous fluidized bed for spraying coating pelletizing machine according to claim 1 is characterized in that said split-wind plate (2) is obliquely installed or split-wind plate (2) plane is provided with to discharging opening (18), is furnished with oblique hole on the plate.

7. comminutor according to claim 1 is characterized in that said split-wind plate adopts the step structure that gradually falls to discharging opening (18).

8. comminutor according to claim 1 is characterized in that interior heating clamber (5) is separated into several unit by longitudinal baffle (21), heat exchanger (11) in correspondence is provided with a group in each unit; Said longitudinal baffle (21) has through hole or/and be provided with spacing between said longitudinal baffle and the split-wind plate (2).

9. comminutor according to claim 1, the upper surface that it is characterized in that said split-wind plate (2) is established one deck and is divided the wind net.

10. according to each described comminutor in the claim 1～9, it is characterized in that the said split-wind plate (2) and the vertical range of internal heater are 200～1400mm, returning charge mouth (20) is 50～500mm with the vertical dimension,postural of spray gun (3); Returning charge mouth (20) is 50～500mm with the vertical range of split-wind plate (2).