CN100351008C

CN100351008C - Granulation spray nozzle differential rotating granulation

Info

Publication number: CN100351008C
Application number: CNB2005100960100A
Authority: CN
Inventors: 孔亦周
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-09-09
Filing date: 2005-09-09
Publication date: 2007-11-28
Anticipated expiration: 2025-09-09
Also published as: CN1762564A

Abstract

The present invention relates to a granulation spray head for differential rotary granulation, which comprises a spray head shell which is fixedly connected with a rotary shaft in a differential rotary mechanism and is provided with a spray hole, wherein a middle flange in the spray head shell is fixedly connected with the end head of the rotary shaft outside the differential rotary mechanism; L-shaped rib boards are radially and uniformly fixed on the middle flange along the circumference; a gap is reserved between each L-shaped rib board and the spray head shell; the conicity of the gap is equal to that of the spray head shell; a central axis line of the spray hole is perpendicular to the cone mother surface of the spray head shell. The L-shaped rib boards arranged in the granulation spray head of the present invention and the spray head shell rotate with the same shaft center in opposite directions; moreover, the rotary speed of the L-shaped rib boards and the rotary speed of the spray head shell have differences; the spray hole of the granulation spray head does not work in the state that molten liquid is completely filled due to the incidence angle relation of the molten liquid; the diameter of a liquid flow sprayed out of the spray hole is only about half of the diameter of the spray hole. In this way, the possibility that the spray hole is clogged is reduced to the largest limit; the volume of fractured liquid drops is controlled within the range of the cooling capability of a granulation tower to the liquid drops.

Description

The prilling spry that is used for differential rotating granulation

Technical field

The invention belongs to technical field of chemical, relate to a kind of prilling spry of producing high-viscosity compound Hefei, be specifically related to a kind of prilling spry that is applicable to the differential rotating granulation in high-viscosity compound Hefei.

Background technology

The tower rotary sprinkling pelleting technology of high viscosity composite fertilizer melt, be that material (urea or ammonium nitrate) with nitrogenous element melts to technological temperature, mix under hot state with the powder material of phosphorus element-containing and the powder material that contains potassium element and to become to have the liquid compound slip of flowing of uniform temperature, prilling spry by special use enters the slip that the mixes form with drop in the cooling media again, and drop is shrunk to the solid particle of spheroidal automatically in the process that contacts cooling with refrigerant.

Because the nitrogen of melt method compound fertilizer technology, phosphorus, the viscosity of potassium three elements the material pure ammonium nitrate of its ratio of viscosities or urea liquation in the fusion recombination process is big hundreds of and even thousands of times and contain a considerable amount of solid suspension particles, the spray orifice of prilling spry is easy to blocked, conventional solution is the working time of strengthening the injection diameter of prilling spry or prolonging equipment, but thing followed problem is, increase eyelet and must increase the post-rift volume of drop, the increase droplet size must prolong the time of particle cooling curing, the path that the time that prolongs the particle cooling curing promptly equals to prolong the particle landing is the effective depth of granulation tower just, in order to guarantee that particle is unlikely to when not solidifying fully with regard at the bottom of dropping down onto tower and form accident at the bottom of the sticking tower, just must increase the diameter of granulation tower, height or ventilation, its volume will increase octuple to the diameter of spheric granules if double then, and this is for the certainly not first-selected scheme of production firm.

Summary of the invention

The object of the present invention is to provide a kind of prilling spry that is used for differential rotating granulation, solve high viscosity, contained the fused materials of certain solid suspension particle ratio in tower rotary sprinkling pelleting technology, melting mixing solution makes the spray orifice blocking problem of prilling spry easily, indexs such as output, particle diameter, qualification rate and granule strength, dust emission can be reached, the requirement of suitability for industrialized production can be satisfied again the unit stream time.

The technical solution adopted in the present invention is, the prilling spry that is used for differential rotating granulation, the nozzle housing that comprises the frustum of a cone revolving body of fixedlying connected with rotating shaft in the differential rotating mechanism, have spray orifice on the nozzle housing, in the nozzle housing, one spacer flanger is fixedlyed connected with the termination of differential rotating mechanism outer shaft, spacer flanger is along the radial L type gusset that evenly is fixed with of circumference, leave the gap between L type gusset and the nozzle housing, and equate that with the tapering of nozzle housing the central axis of described spray orifice is vertical with the cone generatrix of nozzle housing.

Characteristics of the present invention also are,

L type gusset is 3～12, and its two ends are fixed with tabular annular baffle ring respectively.

The end points height H 1 of L type gusset is 10～40 millimeters, and its end points is 5～30 millimeters apart from the internal cone wall distance H 2 of nozzle housing.

The tapering of nozzle housing and L type gusset all is 20 °～25 °.

Spray orifice on the nozzle housing is cylindrical, radially distributes, and injection diameter is 5 millimeters of Φ 2～Φ.

Owing to be provided with a coaxial incorgruous rotary body---L type gusset in prilling spry inside, what make that the internal face of prilling spry mainly bears is that fused solution is liquid scouring force rather than the such centrifugal pressure of traditional prilling spry that tangential direction penetrates from the material-feeding mechanism end points, and this liquid scouring force makes liquation inject the spray orifice of prilling spry internal face and make its form with drop break away from prilling spry from the gusset end points tangential direction of circular motion.Because prilling spry and shower nozzle internals L type gusset exist difference on rotary speed, liquation injects angular relationship in addition, so the spray orifice of prilling spry is not to work under the state that liquation is full of fully, the liquid flow diameter of dishing out from spray orifice only is about half of injection diameter, this just can reduce the blocked possibility of spray orifice to greatest extent, also the volume of the drop that ruptures thus can be controlled within the scope of granulation tower to the drop cooling capacity.

Description of drawings

Fig. 1 is the structural representation of prilling spry of the present invention;

Fig. 2 is the A-A cutaway view of Fig. 1;

Fig. 3 is the fundamental diagram of prilling spry of the present invention;

Fig. 4 is the inner L type of a prilling spry of the present invention gusset working condition schematic diagram;

Fig. 5 is the K portion enlarged diagram of Fig. 4.

Among the figure: 1. charging box, 2. in rotating shaft, 3. outer shaft, 4. end face baffle plate, 5. baffle ring, 6. gland, 7. nozzle housing, 8. spacer flanger, 9.L type gusset, 10. bolt, 11. axle sleeves, 12. shaft sleeve key, 13. interior spindle nut, 14. bolts, 15. fused solutions stream, 16. molten melt drops.

The specific embodiment:

The present invention is described in detail below in conjunction with the drawings and specific embodiments.

Prilling spry of the present invention; be applicable to differential rotating granulation mechanism; there is the working-spindle of two coaxial settings in this differential rotating granulation mechanism; rotating shaft 2 and outer shaft 3 promptly; interior rotating shaft 2 drives prilling spry; outer shaft 3 drives the shower nozzle internals material-feeding mechanism that distributes materials, press arts demand, and two main shafts pass through asynchronous in the same way differential rotation of transmission mechanism or reverse differential rotation separately.

As shown in Figure 1; prilling spry of the present invention is arranged on the lower end of differential rotating granulation mechanism; comprise nozzle housing 7; nozzle housing 7 is a metal matter thin-walled frustum of a cone revolving body; tapering is 20 °～25 °; 2～5 millimeters of wall thickness; its two ends are fixed with end face baffle plate 4 and gland 6 respectively; the interior rotating shaft 2 of differential rotating granulation mechanism and outer shaft 3 stretch in the nozzle housing 7; the lower end of interior rotating shaft 2 is connected with axle sleeve 11 by shaft sleeve key 12; gland 6 is by bolt 14; interior spindle nut 13 is fixing with axle sleeve 11; nozzle housing 7 is rotated with interior rotating shaft 2; in the nozzle housing 7; the termination of differential rotating mechanism outer shaft 3 is by bolt 10 fixedly connected spacer flangers 8; spacer flanger 8 is along the radial L type gusset 9 that evenly is fixed with of circumference; L type gusset 9 is welded as a whole with spacer flanger 8; its tapering is identical with the tapering of nozzle housing 7; referring to Fig. 2; L type gusset 9 is set to 6; the quantity of its setting can be 3～12; its end points height H 1 is 10～40 millimeters; leave the gap between L type gusset 9 and the nozzle housing 7; its end points is 5～30 millimeters apart from the internal cone wall distance H 2 of nozzle housing 7; L type gusset 9 is a metal matter structural member; by thickness is that 3～6 millimeters metallic plate machinery Bending Processing forms, and its two ends are fixed with tabular annular baffle ring 5 respectively, and spray orifice radially distributes on the nozzle housing 7; spray orifice is cylindrical; diameter is 5 millimeters of Φ 2～Φ, and the central axis of spray orifice is vertical with the cone generatrix of nozzle housing 7, and the viscosity that the quantity of spray orifice is looked granulation amount and fused solution is different and different.

During the work of differential rotating granulation machine; do incorgruous rotatablely moving by rotating shaft 2 and outer shaft 3 in the transmission mechanism driving separately; referring to Fig. 3; when fused solution stream 15 enters in the nozzle housing 7 from ring-type charging box 1; touch that to be changed into the shower nozzle axis by the vertical landing state immediately behind the shower nozzle internals L type gusset 9 that is rotating be the centrifugal rotation status in the center of circle; as Fig. 4; shown in Figure 5; the fused solution of centrifugal rotation stream 15 is along L type gusset 9 internal faces during to the bending part of L type gusset 9; automatically form the similar substantially liquid stream of section from bottom to top owing to be subjected to the resistance of bending part; end points from shower nozzle internals L type gusset 9 is the tangential direction ejaculation then; fused solution stream that tangential direction penetrates 15 forms uniformly at shower nozzle cone 7 internal faces and washes away; when this fused solution stream 15 is run into spray orifice on nozzle housing 7 generatrixs of counter-rotating; must be along a side of the spray orifice nozzle housing 7 of being dished out, the fused solution of the nozzle housing 7 of dishing out is exactly a molten melt drop 16.Nozzle housing 7 is big more with the speed difference of shower nozzle internals L type gusset 9, and the volume of the molten melt drop 16 of dishing out from shower nozzle shell 7 spray orifices is just more little.

A because inner coaxial rotary body---the L type gusset 9 in addition of prilling spry of the present invention, so during prilling spry work, the cavity the inside is the liquid revolving body liquid layer as traditional rotating granulation shower nozzle not, what the internal face of prilling spry mainly bore is that fused solution is liquid scouring force rather than the such centrifugal pressure of traditional prilling spry that tangential direction penetrates from the material-feeding mechanism end points, this liquid scouring force on the one hand will owing to the former thereby poly-material that is attached between prilling spry inwall face and the hole of centrifugal force break up to prevent since time relationship and contingent such as chemical reactions such as viscosity increases, shower nozzle internals L type gusset 9 is injected liquation the spray orifice of prilling spry internal face and is made its form with drop break away from prilling spry from the gusset end points tangential direction of circular motion on the other hand.

Because prilling spry shell 7 exists difference with shower nozzle internals L type gusset 9 on rotary speed, liquation injects angular relationship in addition, so be not liquation fully abrim in the spray orifice of prilling spry, that is to say, although the spray orifice opening diameter of the rotating granulation shower nozzle that the spray orifice opening diameter of differential rotating granulation shower nozzle is more traditional is big manyfold, but because it is not to work under the state that liquation is full of fully, the liquid flow diameter that event is dished out from spray orifice only is about half of injection diameter, this just can reduce the blocked possibility of spray orifice to greatest extent, also the volume of the drop that ruptures thus can be controlled within the scope of granulation tower to the drop cooling capacity.

Again owing to have a considerable amount of solid suspension particles in the fused solution, these solid suspension particles are variant with the proportion of fused solution to be that motion is so very easily form solid, liquid laminated segregation mutually in a rotating cone in addition, and the laminated segregation of solid, liquid phase materials and sedimentation also are the major reasons that causes shower nozzle to work.The material-feeding mechanism of prilling spry of the present invention and differential rotating granulation mechanism there are differences on direction of rotation or rotary speed; such structure is just mixed the paddle agitating device as being both one; the laminated segregation and the sedimentation phenomenon of solid, liquid phase materials will effectively be contained in the shower nozzle cavity, thereby have improved the operating efficiency of shower nozzle greatly.

Claims

1. the prilling spry that is used for differential rotating granulation, the nozzle housing (7) that comprises the frustum of a cone revolving body of fixedlying connected with rotating shaft (2) in the differential rotating mechanism, nozzle housing has spray orifice on (7), it is characterized in that, in the nozzle housing (7), one spacer flanger (8) is fixedlyed connected with the termination of differential rotating mechanism outer shaft (3), spacer flanger (8) is along the radial L type gusset (9) that evenly is fixed with of circumference, leave the gap between L type gusset (9) and the nozzle housing (7), and equate that with the tapering of nozzle housing (7) central axis of described spray orifice is vertical with the cone generatrix of nozzle housing (7).

2. according to the described prilling spry of claim 1, it is characterized in that described L type gusset (9) is 3～12, its two ends are fixed with tabular annular baffle ring (5) respectively.

3. according to claim 1 or 2 described prilling spries, it is characterized in that the end points height (H1) of described L type gusset (9) is 10～40 millimeters, its end points is 5～30 millimeters apart from the internal cone wall distance (H2) of nozzle housing (7).

4. according to the described prilling spry of claim 1, it is characterized in that described nozzle housing (7) all is 20 °～25 ° with the tapering of L type gusset (9).

5. according to the described prilling spry of claim 1, it is characterized in that the spray orifice on the described nozzle housing (7) is cylindrical, radially distribute that injection diameter is 5 millimeters of Φ 2～Φ.