CN100335855C

CN100335855C - Self-grinding and self-sifting rotary kiln with multiple cartridges

Info

Publication number: CN100335855C
Application number: CNB031455247A
Authority: CN
Inventors: 李纯
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-06-27
Filing date: 2003-06-27
Publication date: 2007-09-05
Anticipated expiration: 2023-06-27
Also published as: CN1566886A

Abstract

The present invention relates to a self-grinding and self-sifting rotary kiln with multiple cartridges, which is composed of a kiln body, a kiln body base, a motor for driving the kiln body to rotate, a feed inlet, a discharge outlet, a smoke dust discharging device, etc. The present invention is characterized in that a plurality of coaxial cartridge bodies (17, 19, 20) are sheathed in an inner cavity of the kiln body, and besides, inlets (22) communicated with each other exist between each two adjacent inner and outer cartridges. Thus, the inner cavity body structure emulating an Archimedian spiral structure is formed, and a grid (29) structure is manufactured in the cartridge wall of each inner cartridge body. The rotary kiln can ensure that materials are in sufficient contact with a gas-phase medium under the continuous action of a sifting net on each inner cartridge in the kiln cavity and a material coiling plate (21). As a result, the present invention enhances the utilization of heat energy and the productivity of the rotary kiln. Meanwhile, owing to the action of a grinding roller (18) in a central inner cartridge (20), the materials are crushed and ground into thin particles and subsequently sent out of the discharge outlet.

Description

Many autogenous grindings are from sieving rotary kiln

The invention belongs to a kind of improvement technology of rotary kiln inner-cavity structure.

Rotary kiln is widely used in industrial purposes such as drying, roasting, calcining, calcination, fuming volatilization, high-temperature material cooling chemical industry hybrid reaction in industries such as metallurgy, chemical industry, building materials, refractory materials.It is a long cylindrical shell profile, and horizontally-inclined is installed on its a plurality of pedestals; Drive the rotation of kiln body by reductor, material to be processed is from the high-end kiln intracoelomic cavity of sending into, and in the rotation, material rolls in tube, fully contacts with High Temperature Gas phase medium in the inner chamber, and moves to low side, burns till gradually from the low side discharging opening and sends.Gas, liquid or dusty fuel and air together spray into kiln chamber internal combustion from low side.Material is because of the gravity effect, and generally at the chamber inner bottom part, flue gas is from high-end importing flue, through gathering dust, discharging after the udst separation.The problem that exists is in process, and material is in the bottom in the kiln chamber all the time, the weak effect that rolls, thereby the condition of material absorption heat energy is poor, heat loss is just big.The patented technology of ZL02239188.6, the coiled strip plate of several shapes is installed, a kind of exactly degree of rolling that increases the material kiln chamber in, the technology that increase material and intracavity gas medium etc. fully contact on the rotary kiln cavity wall, reach and improve rotary kiln production efficiency, the purpose of energy savings.But still the problem that exists the space in the kiln chamber not to be fully used, there be big material material to deposit the phenomenon of the bottom in kiln chamber unavoidably.Just make that also utilizing of equipment is insufficient, the processing cost of material does not also have maximum reduction.

The technical problem to be solved in the present invention is the deficiency that exists in the patented technology at ZL02239188.6, the inner chamber of rotary kiln be designed to many netted, have autogenous grinding and sieve the rotary kiln of function certainly.

The technical scheme that addresses the above problem is as follows:

A kind of many autogenous grindings are from sieving rotary kiln, it is made of kiln body, kiln susceptor body, driving kiln body motor rotating, charging aperture, discharging opening, flue dust discharger etc., key is to have a plurality of coaxial cylindrical shells to be nested in the kiln intracoelomic cavity, and between whenever adjacent inside and outside two the inlet that interconnects is arranged, constitute the intracavity structure of imitative Archimedian screw shape structure, the barrel of each cylindrical shell all is manufactured with network.

Further scheme is, whenever adjacent inside and outside two inlet is in the sidewall locations of cylindrical shell; The grinding roller that an activity is arranged in innermost central cylinder; The barrel of each inner barrel in the kiln intracoelomic cavity all is manufactured with grid, constitutes netted inner core; On each cylinder lumen wall except that central cylinder "T"-shaped coiled strip plate is installed all; On the feeding part inwall in kiln intracoelomic cavity, first inner core, the second inner core tube chamber, be fixed with spirality guide sheet.

Further scheme is that the grid of each the netted cylindrical shell in the kiln chamber can be linear slit shape structure, orderliness's shape structure or braiding shape structure.

Just make a kind of many autogenous grindings from sieving rotary kiln by such scheme.Add man-hour, the kiln body rotates under motor-driven, material is sent into from feed end, and under the effect of the guide sheet of spirality guide sheet, material is delivered to fast has netted tube part, under the effect of coiled strip plate, material is constantly rolled, and fully with thermal current contact in the chamber, the material in the outer tube is in dropping process, under the interior shaft screen of the quilt that particle is little, the oarse-grained heating of still in the space of urceolus and inner core, rolling.Simultaneously, the material on the screen cloth between inner/outer tube heats in the inner core under the inlet of two barrel sides enters again in rotation.Thereby material just has bigger space in the kiln intracoelomic cavity, has more fully and gas medium time of contact, and heat energy will be fully utilized.And finally be in material in the center inner core of innermost layer, in running, the steel grinding roller that is placed in its inner chamber is levigate with material in rolling, and drops to bottom, kiln chamber, sends from discharging opening.The material of having realized many barrel structures distributes, and the effect of autogenous grinding from sieve arranged.

Advantage of the present invention is, because the inner/outer tube installed in the rotary kiln inner chamber is nested and the multi-cartridge rotary kiln of the imitative Archimedian screw structure of the inlet that is interconnected is arranged, the a plurality of inner cores that in addition are in the kiln chamber all are made into the net like cylindrical shell, both increase the attaching space and the time of thermal current in material and the kiln chamber, and can in heating process, do Screening Treatment to material again; A grinding roller also has been installed in the centremost inner core, and with the rotation of kiln body, grinding roller is also rolling, and pulverizes and presses thin, limit to sieve to the bottom being in material limit processing, limit in the innermost inner core; Played the effect of autogenous grinding from sieve.Material to be processed enters the kiln body from high-end charging aperture, under the spirality guide sheet effect on the tube inwall, can deliver to fast in the net like cylindrical shell, accelerated flowing of material, that joins has also installed coiled strip plate, the contact that has strengthened material gas phase media in tube on the inwall at every layer of cylindrical shell.Made full use of the space in the kiln intracoelomic cavity.Thereby, compared to existing technology, can more effectively utilize heat energy, increase the production capacity of rotary kiln, reduce levigate workload to the finished product material.

Fig. 1, rotary kiln outline drawing.

Fig. 2, rotary kiln cross-sectional view.

The frame structure shape schematic diagram of Fig. 3, inner core.

Fig. 4, be example with two symmetrical coiled strip plates, the mounting means schematic diagram of coiled strip plate in the framework of cylindrical shell.

Fig. 5, after on the framework of inner core grid being installed, the netted inner core stereogram of formation.

The position view of Fig. 6, spirality guide sheet each leading portion in the kiln intracoelomic cavity.

Fig. 7, "T"-shaped coiled strip plate three-dimensional shape schematic diagram.

Below in conjunction with accompanying drawing,, the solution of the present invention is specified as embodiments of the invention.

With reference to Fig. 1, many autogenous grindings are identical with general rotary kiln from the profile of sieving rotary kiln, by the kiln body 5 of horizontally-inclined on pedestal 1,8, on the motor base 14 below the kiln body middle part, a driving wheel 13 is installed, kiln is one of suit and the driven pulley 4 of kiln as one on one's body, by decelerator 12 motor 11 power are passed to driving wheel 13, drive kiln body 5 and rotate.In the front and back of motor base 14 a

support roller seat

16,10 is installed respectively, support roller 15,9 on the seat and the

rolling ring

3,6 on the pairing kiln body 5 are rotationally connected.Kiln body 5 lower ends are discharging openings 2, open at kiln intracoelomic cavity lower wall, and the fuel gas input mechanism is installed in the front of lower end.The upper end is a charging aperture, over against the kiln intracoelomic cavity.Aiutage 7 also is installed in the upper end, and from then on the waste gas after handling by dedusting and pernicious gas discharge.

With reference to Fig. 2,7, three coaxial inner cores are installed in the kiln intracoelomic cavity of the present invention, have an inlet 22 that faces two connections mutually at the sidewall of each inner core, behind the installation forming, its cross section promptly constitutes a kind of imitative Archimedian screw shape structure.On the inwall of kiln body inwall and first inner core, 17, the second inner cores 19, a plurality of "T"-shaped coiled strip plates 21 are installed all.Place its length and the approaching steel grinding roller 18 of this inner core length in the center inner core 20, the coiled strip plate is not installed on its inwall.

With reference to Fig. 1,6, be fixed with spirality guide sheet 30 on the leading portion inwall of the charging mouth inner wall in the kiln intracoelomic cavity and first, second

inner core

17,19, on center inner core 20 walls guide sheet is not installed.The length of spirality guide sheet 30 in inner chamber is selected according to the total length of kiln body 5 and the flexible in size of intracavity diameter, generally is controlled at 2-5 rice, is mainly used in to make the material that enters in the inner chamber can deliver to netted shell portion fast.Placed in the center inner core 20 of grinding roller 18, for preventing to skid off to two-port in the therefrom intracardiac tube of grinding roller 18, can be in the inner core of center the affixed restriction wire nets that prevent that grinding roller 18 from axially gliding, this wire net is in the cross section of center inner core.

With reference to Fig. 2,3,4,5, in order to guarantee the intensity of grid type inner core, make each inner core framework earlier, at the peripheral affixed grid of framework.Framework by drum shaft to straight-bar 28 and constitute by round frame 27 two parts that the barrel dliameter size is determined, straight-bar 28 is welded on the periphery of round frame, installation welding for the ease of several

inner cores

17,19,20, at least weld three groups of connecting struts 23 that are connected with the inner core framework of overcoat on the round frame 27 of inner core framework, this pillar 23 is on the diameter extended line of round frame.And a sheet material 24 is installed on one group of connecting struts 23 on arbitrary axis, arrive the inlet 22 of this inner core as another big relatively inner core of diameter.With reference to Fig. 5,2,7, "T"-shaped coiled strip plate 21 is distributed on the round frame 27 of round cavity inwall, size according to the tube chamber, suitably select the installation quantity of "T"-shaped coiled strip plate, the straight flange 31 and the barrel of every "T"-shaped coiled strip plate 21 are fixed together, horizontal edge 32 just is in the space in a chamber, a material that enters in the tube is rolled, formation can be fully with the parts of gas phase media contact-making surface in the chamber.With reference to Fig. 4,6, the layout of the grid 29 on the framework is to utilize the high wire netting of existing intensity to be fixed in to form a latticed cylindrical shell on the framework; But 26,25 of upper and lower two straight-bars that are installed to sheet material 24 positions, do not lay affixed grid, form inside and outside two inlet 22 that faces mutually.Constitute the grid material of grid inner core, also can select linear slit shape, braiding shape for use or make the isostructural grid of orderliness's shape of aperture in the sheet metal upper punch.

With reference to Fig. 1,2,4,5,6,7, press the design size of rotary kiln, determine first inner core 17, second inner core 19 and center inner core 20 internal diameter sizes, on each framework, lay affixed good grid 29, second inner core 19 is enclosed within center inner core 20 peripheries, by three groups of connecting struts 23 on the inner core framework of center, affixed good two inner core suits.Equally, again first inner core 17 is sleeved on second inner core 19, by three groups of connecting struts 23 on the second inner core framework that two inner core suits are affixed good.Again kiln body 5 is enclosed within first inner core, 17 peripheries at last, and it is the kiln body is affixed good with first inner core 17 by three groups of connecting struts 23 on the first inner core framework, the inlet 22 that the sidewall of each inner core just all has a straight-bar 26 by bar shaped sheet material 24 and top that is interconnected to form has constituted a kind of many rotary kilns of imitative Archimedian screw structure.Place steel grinding roller 18 in the center inner core 20, the lump material that can will fall in it is milled carefully, is slipped to discharging opening 2 places at the bottom of the kiln again.In process of production, material is sent into from kiln body 5 high-end charging apertures, and under spirality guide sheet affixed on each leading portion inwall of sliding force and inlet portion 30 effects, being sent to very soon has the inner chamber of grid 29 section on the cylindrical shell; In the rotation of kiln body 5, coiled strip plate 21 is rolled material, rolls in the kiln intracoelomic cavity, just can increase the contact-making surface of material with gas phase media, thereby the heat energy utilization rate is just high, the speeding up of processing material handling.Part material is sieved into from mesh again in the inner core that faces mutually, through 21 effects of coiled strip plate, fully contacts with gas phase media in this tube equally.By that analogy, after the coiled strip plate 21 of several inner cores and the screen cloth effect on the grid 29, fall material in the center inner core 20 and be exactly the fines that the repeatedly effect through coiled strip plate 21 and screen cloth forms.In addition, bulk material above the screen cloth of grid type

inner core

17,19, in rotation, inlet 22 places through facing sidewall between two mutually enter in the next inner core, again through coiled strip plate 21 and screen cloth effect, a part can the bump change be broken mutually in rotation, be sieved in the inner core of center, the part that stays through other two inlets 22 that face mutually between inner core, enters in the rotation in the center inner core 20 again, under the effect that rolls of grinding roller 18, crushed fine ground; Slippage is sent to discharging opening 2, so formed the effect of autogenous grinding from sieve.Not only can make full use of the space in the kiln chamber, repeated multiple times is handled processed material, has increased the contact-making surface and the time of hot phase medium in material and the chamber greatly, through the finished product material of autogenous grinding behind sieve, reduce the workload in the subsequent handling again, also improved the production capacity of rotary kiln.

Claims

1, a kind of many autogenous grindings are from sieving rotary kiln, it is made of kiln body (5), kiln susceptor body (1,8), driving kiln body motor rotating (11), charging aperture, discharging opening (2), flue dust discharger (7), it is characterized in that in kiln body (5) inner chamber, having a plurality of coaxial cylindrical shells (17,19,20) to be nested, and between whenever adjacent inside and outside two the inlet (22) that interconnects is arranged, constitute the intracavity structure of imitative Archimedian screw shape structure, the barrel of each cylindrical shell all is manufactured with grid (29) structure.

2, many autogenous grindings according to claim 1 is characterized in that the sidewall locations of whenever adjacent inside and outside two inlet (22) at cylindrical shell from sieving rotary kiln.

3, many autogenous grindings according to claim 1 is characterized in that having the grinding roller (18) of an activity from sieving rotary kiln in innermost central cylinder (20).

4, many autogenous grindings according to claim 1 and 2 is characterized in that on each the cylinder lumen wall except that central cylinder (20) "T"-shaped coiled strip plate (21) being installed all from sieving rotary kiln.

5, many autogenous grindings according to claim 1 are from sieving rotary kiln, it is characterized in that described a plurality of coaxial cylindrical shell (17,19,20) comprises first inner core (17) and second inner core (19), on the feeding part inwall in kiln body (5) inner chamber, first inner core (17), second inner core (19) tube chamber, be fixed with spirality guide sheet (30).

6, many autogenous grindings according to claim 1 are from sieving rotary kiln, and the grid (29) that it is characterized in that each cylindrical shell in the kiln intracoelomic cavity (5) is linear slit shape structure, orderliness's shape structure or braiding shape structure.