A kind of mixed stirring device with heating function
Technical field
The invention belongs to technical field of chemical, relate to a kind of heating, mixing stirring device that is used to contain a large amount of solid suspension molten slurries.
Background technology
In the chemical fertilizer fused mass granulating technique, it at first is material (urea or ammonium nitrate) fusion with nitrogenous element, stir through mixing arrangement with the powder material (MAP) of the phosphorus element-containing that is heated to technological temperature and the powder material (potassium chloride or potassium sulfate) that contains potassium element then, be mixed into the compound slip of flowable liquid state with uniform temperature, prilling spry by special use is injected to the slip that the mixes form with drop in the cooling media again, this refrigerant can be that gas also can be and the immiscible liquid of material, and this drop is shrunk to the solid particle of spheroidal automatically in the process that contacts cooling with refrigerant.
What the mixing arrangement of present this technology all adopted is still formula container center vertical axis paddle structure, its operation principle is: the melt liquid (urea or ammonium nitrate) and the various powder material that reach the technological requirement temperature continuously enter in the mixer respectively by proportioning, formed a kind of composite liquefied slip fast at the effect of the agitating device liquid-solid phase material of ordering, slip moves in a circle with the stirrer paddle direction of rotation, and to form to stir the axle center be the concavity whirlpool in the center of circle, the powder material that falls into above the slurries is involved in eddy-currents immediately and is rolled turbulent motion to reach liquid with the stirrer paddle work, the quick well-mixed purpose of solid phase, the compound slip that mixes enters into down granulating working procedure together from the overfall that the mixer barrel is positioned at liquid level.
For various reasons, many users have removed the special-purpose powder heater of two covers of one ammonium of the heated phosphoric in the early stage technological design and heating sylvite, the volume of the substitute is mixer increases, in mixer, arrange the steam pipe coil of certain area, remedy because the temperature drop that the normal temperature powder material causes melt with the area of steam pipe coil and the temperature of high steam.Because the method has certain practical value, therefore in the field of businessly soon extensively used, but the method also has the some shortcomings part, such as steam pipe coil owing to the certain area of layout in mixer, certainly will to increase the volume of mixer, the volume potential that increases mixer must just prolong the time of staying of material in mixer, and according to physical and chemical principle, chemical reaction can take place and cause MAP polymerization generation APP melt to make slip viscosity sharply increase along with the prolongation of time in urea and MAP, so does not wish the overstand of material in mixer on the technology; Such as owing in mixer, arrange the steam pipe coil of certain area, certainly will just strengthen the resistance of fluid motion again,, just must strengthen the terminal velocity and the power of paddle in order to guarantee the mixed effect of material in mixer; For another example owing in mixer, arrange the steam pipe coil of certain area, all cause certain difficulty for cleaning, maintenance etc., particularly when the user need change the formula for a product structure and changes nitro into as urinating base or owing to steam pipe coil is revealed when needing maintenance because of reasons such as abrasions.
Summary of the invention
The purpose of this invention is to provide a kind of mixing paddle with heating function, changed steam pipe coil structure static in the mixer in the prior art into steam hollow blade that central stirring shaft rotatablely moves, both can remedy the temperature drop that the normal temperature powder material causes melt fast, can evenly mix compound slip again.
The technical solution used in the present invention is: a kind of mixed stirring device with heating function, comprise rotating shaft and paddle, and paddle is connected with rotating shaft by spoke; Rotating shaft, spoke and paddle all are hollow-core construction, and three's hollow parts communicates; The upper end of rotating shaft is an openend, and the lower end is a closing end.
Paddle is formed by a plurality of blade cell string: a plurality of blades unit is between two circular hollow tubes set up and down, and the upper end of a plurality of blades unit is chained together by the circular hollow tube that is positioned at the top, and the lower end is chained together by the circular hollow tube that is positioned at the below; Rotating shaft is positioned at two circular hollow tube inboards, is respectively arranged with the upper and lower spoke between two circular hollow tubes and the rotating shaft; The upper and lower spoke number equates, the every pair of corresponding up and down spoke is positioned on the same vertical plane and is parallel to each other, and is provided with the inner ring hollow blade between every pair of corresponding up and down spoke.
Wherein, each blade unit comprises two outer ring hollow blades; Connect by elbow respectively between two upper ends of these two outer ring hollow blades and two lower ends; Two circular hollow tubes upper and lower side elbow of passing each blade unit respectively is chained together the upper and lower side of each blade unit up and down; Wherein, an outer ring hollow blade in each blade unit is positioned at two circular hollow tube inboards, and another root outer ring hollow blade is positioned at two circular hollow tube outsides; All outer ring hollow blades, all inner ring hollow blades, all elbows, two circular hollow tubes, all spokes and rotating shafts all are hollow-core construction, and the hollow parts of each parts communicates.
Wherein, each blade unit comprises an outer ring hollow blade; The upper and lower side of outer ring hollow blade is connected with two circular hollow tubes up and down by elbow respectively; Two circular hollow tubes upper and lower side elbow of passing each blade unit respectively is chained together the upper and lower side of each blade unit up and down; All outer ring hollow blades all are positioned at the outside of two circular hollow tubes; All outer ring hollow blades, all inner ring hollow blades, all elbows, two circular hollow tubes, all spokes and rotating shafts all are hollow-core construction, and the hollow parts of each parts communicates.
Wherein, a plurality of blade units are divided into a plurality of A of blade unit and a plurality of blade unit B; Each blade unit A comprises two outer ring hollow blades, connects by elbow respectively between two upper ends of two outer ring hollow blades and two lower ends; Each blade unit B comprises an outer ring hollow blade, and the upper and lower side of every outer ring hollow blade is connected with elbow respectively; A plurality of A of blade unit and a plurality of blade unit B are and alternately are provided with up and down between two circular hollow tubes; Two circular hollow tubes upper and lower side elbow of passing each blade unit respectively is chained together the upper and lower side of each blade unit up and down; Wherein, an outer ring hollow blade among each A of blade unit is positioned at two circular hollow tube inboards, and another root outer ring hollow blade is positioned at two circular hollow tube outsides; The outer ring hollow blade of blade unit B all is positioned at two circular hollow tube outsides; All outer ring hollow blades, all inner ring hollow blades, all elbows, two circular hollow tubes, all spokes and rotating shafts all are hollow-core construction, and the hollow parts of each parts communicates.
Its characteristics are that also the cross section of rotating shaft is the positive circular hollow tube that waits wall thickness.
Its characteristics further are, the cross section of spoke, two circular hollow tubes, outer ring hollow blade, inner ring hollow blade and elbows such as is at the positive circular hollow tube or the non-positive circular hollow tube of wall thickness.
The invention has the beneficial effects as follows,
1. the mixed volume of a container that agitating device of the present invention requires is less, and mixed volume of a container has determined the time of staying of material in mixer, so the time that material stops in mixer when stirring is shorter;
2. apparatus of the present invention have not been owing to there has been to hinder the coil arrangement spare of fluid motion in the mixed container, thus can be during the paddle rotation to desirable whirlpool of melt formation in container, and desirable whirlpool helps powder material and enters into melt inside as quickly as possible;
3. owing to there has not been to hinder the coil arrangement spare of fluid motion in the mixed container of the present invention, can form a desirable whirlpool so the rotating speed of paddle needn't be crossed the higher position, therefore the power of motor that requires will hang down;
4. squirrel-cage paddle such as the same large-scale efficient egg-whisk of forming by some hollow tubulations, the collision of liquid, solid matter in this structure extremely helps melt when paddle rotates, tear, kneading etc. mixes and stirs action, so can finish the homogeneous mixing to composite solution fast;
5. simultaneously because high steam and material temperature are poor, this structure extremely helps the contact heat-exchanging of composite solution and hollow paddle, so can remedy the temperature drop that the normal temperature powder material causes melt fast;
6. owing to contain not fusant of a large amount of solids in the composite solution, particularly contain the chloride in a certain proportion of breeze and the sylvite, the high-speed motion of fluid in addition, the abrasion of metal structure is inevitable, therefore mixed stirring device and mixer being made is two relatively independent devices, just is easy to mixed stirring device hung out from mixer together with transmission mechanism clean, keep in repair even change.
Compare with the structure of the traditional built-in steam pipe coil of mixer, under equal conditions, the forced convection heat transfer coefficient is bigger several times to tens times than free convection heat transfer coefficient.The steam hollow blade structure that central stirring shaft of the present invention rotatablely moves has more the evident characteristic that the quick homogeneous of melt is mixed except have the high advantage of rate of heat transfer aspect heat exchange.
Description of drawings
Fig. 1 be mixed stirring device of the present invention be built in the mixer with transmission mechanism and two-way in the matching used structural representation of tubular type swivel joint;
Fig. 2 be with the matching used transmission mechanism of agitating device of the present invention and two-way in the structural representation of tubular type swivel joint;
Fig. 3 is the structural representation of mixed stirring device in the embodiment of the invention 1;
Fig. 4 is the vertical view of Fig. 3;
Fig. 5 is the B-B view among Fig. 4;
Fig. 6 is the C-C view among Fig. 4;
Fig. 7 is the stereogram of mixed stirring device in the embodiment of the invention 1;
Fig. 8 is the structural representation of mixed stirring device in the embodiment of the invention 2;
Fig. 9 is the vertical view of Fig. 8;
Figure 10 is the D-D view among Fig. 9;
Figure 11 is the structural representation of mixed stirring device in the embodiment of the invention 3;
Figure 12 is the vertical view of Figure 11;
Figure 13 is the E-E view among Figure 12.
Among the figure, 1. rotating shaft, 2. spoke, 3. blade unit, 4. circular hollow tube, 5. inner ring hollow blade, 6. outer ring hollow blade, 7. elbow, 8. flange A, 9. mixer, 10. transmission mechanism, 11. hollow spindles, 12. tubular type swivel joint in two-way, 13. flange B, 14. steam inlets, 15. steam passes through the hole, the cavity between 16. outer tubes and the interior pipe, the inner chamber of 17. interior pipes, 18. condensation-water drain, 19. condensate pipes, 20. bed material blow-off valves.
The specific embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
Embodiment 1
As shown in Figure 1, the invention provides a kind of mixed stirring device, comprise rotating shaft 1 and paddle with heating function; The upper end of rotating shaft 1 is an openend, and the lower end is a closing end, and the upper end of rotating shaft 1 also is provided with flange A8.Whole mixed stirring device is arranged on mixer 9 inside, and rotating shaft 1 is arranged on mixer 9 central inner in vertical state.As Fig. 3,4 and shown in Figure 7, paddle is connected in series by a plurality of blades unit 3: a plurality of blades unit 3 between two circular hollow tubes 4 set up and down, this two circular hollow tube 4 equal diameters, and be horizontally set on mixer 9 inside; Rotating shaft 1 is positioned at two circular hollow tube 4 inboards, and two centers of circle of the axis of rotating shaft 1 and two circular hollow tubes 4 are positioned on same the vertical line.A plurality of blade units 3 are divided into a plurality of A of blade unit and a plurality of blade unit B; As shown in Figure 6, each blade unit A comprises between two upper ends of 6, two outer ring hollow blades 6 of two cylindrical outer ring hollow blades and two lower ends and connecting by elbow 7 respectively; As shown in Figure 5, each blade unit B comprises a cylindrical outer ring hollow blade 6, and the upper and lower side of outer ring hollow blade 6 is connected with elbow 7 respectively; As Fig. 3,4 and shown in Figure 7, a plurality of A of blade unit and a plurality of blade unit B are and alternately are provided with up and down between two circular hollow tubes 4.Be positioned at elbow 7 that the circular hollow tube 4 of top passes each 3 upper ends, blade unit the upper end of each blade unit 3 is chained together, the elbow 7 that the circular hollow tube 4 that is positioned at the below passes each 3 lower ends, blade unit is chained together the lower end of each blade unit 3.Wherein, an outer ring hollow blade 6 among each A of blade unit is positioned at two circular hollow tube 4 inboards, and another root outer ring hollow blade 6 is positioned at two circular hollow tube 4 outsides; The outer ring hollow blade 6 of each blade unit B all is positioned at the outside of two circular hollow tubes 4.Above circular hollow tube 4 and rotating shaft 1 between evenly be welded with 3 horizontally disposed upper strata spokes 2, below circular hollow tube 4 and rotating shaft 1 between evenly be welded with 3 horizontally disposed lower floor spokes 2, the every pair of corresponding up and down spoke 2 is positioned on the same vertical plane and is parallel to each other, and is provided with cylindrical inner ring hollow blade 5 between every pair of corresponding up and down spoke 2.All outer ring hollow blades 6 and inner ring hollow blade 5 all be arranged in parallel with rotating shaft 1.All outer ring hollow blades 6, all inner ring hollow blades 5, all elbows 7, two circular hollow tubes 4, all spokes 2 and rotating shafts 1 all are hollow-core construction, and the hollow parts of each parts communicates.
Embodiment 2
As shown in Figure 1, the invention provides a kind of mixed stirring device, comprise rotating shaft 1 and paddle with heating function; The upper end of rotating shaft 1 is an openend, and the lower end is a closing end, and the upper end of rotating shaft 1 also is provided with flange A8.Whole mixed stirring device is arranged on mixer 9 inside, and rotating shaft 1 is arranged on mixer 9 central inner in vertical state.As Fig. 8 and shown in Figure 9, paddle is connected in series by a plurality of blades unit 3: a plurality of blades unit 3 between two circular hollow tubes 4 set up and down, this two circular hollow tube 4 equal diameters, and be horizontally set on mixer 9 inside; Rotating shaft 1 is positioned at two circular hollow tube 4 inboards, and two centers of circle of the axis of rotating shaft 1 and two circular hollow tubes 4 are on same vertical line.As shown in figure 10, each blade unit 3 comprises two cylindrical outer ring hollow blades 6, connects by elbow 7 respectively between two upper ends of these two outer ring hollow blades 6 and two lower ends; Be positioned at elbow 7 that the circular hollow tube 4 of top passes each 3 upper ends, blade unit the upper end of each blade unit 3 is chained together, the elbow 7 that the circular hollow tube 4 that is positioned at the below passes each 3 lower ends, blade unit is chained together the lower end of each blade unit 3.Wherein, an outer ring hollow blade 6 in each blade unit 3 is positioned at two circular hollow tube 4 inboards, and another root outer ring hollow blade 6 is positioned at two circular hollow tube 4 outsides.Above circular hollow tube 4 and rotating shaft 1 between evenly be welded with 3 horizontally disposed upper strata spokes 2, below circular hollow tube 4 and rotating shaft 1 between evenly be provided with 3 horizontally disposed lower floor spokes 2, the every pair of corresponding up and down spoke 2 is positioned on the same vertical plane and is parallel to each other, and is provided with cylindrical inner ring hollow blade 5 between every pair of corresponding up and down spoke 2.All outer ring hollow blades 6 and inner ring hollow blade 5 all be arranged in parallel with rotating shaft 1.All outer ring hollow blades 6, all inner ring hollow blades 5, all elbows 7, two circular hollow tubes 4, all spokes 2 and rotating shafts 1 all are hollow-core construction, and the hollow parts of each parts communicates.
Embodiment 3
As shown in Figure 1, the invention provides a kind of mixed stirring device, comprise rotating shaft 1 and paddle with heating function; The upper end of rotating shaft 1 is an openend, and the lower end is a closing end, and the upper end of rotating shaft 1 also is provided with flange A8.Whole mixed stirring device is arranged on mixer 9 inside, and rotating shaft 1 is arranged on mixer 9 central inner in vertical state.Shown in Figure 11 and 12, paddle is connected in series by a plurality of blades unit 3: a plurality of blades unit 3 between two circular hollow tubes 4 set up and down, this two circular hollow tube 4 equal diameters, and be horizontally set on mixer 9 inside; Rotating shaft 1 is positioned at two circular hollow tube 4 inboards, and two centers of circle of the axis of rotating shaft 1 and two circular hollow tubes 4 are positioned on same the vertical line.As shown in figure 13, each blade unit 3 includes only a cylindrical outer ring hollow blade 6; The upper and lower side of outer ring hollow blade 6 is connected with elbow 7 respectively; Be positioned at elbow 7 that the circular hollow tube 4 of top passes each 3 upper ends, blade unit the upper end of each blade unit 3 is chained together, the elbow 7 that the circular hollow tube 4 that is positioned at the below passes each 3 lower ends, blade unit is chained together the lower end of each blade unit 3.Wherein, all outer ring hollow blades 6 all are positioned at the outside of two circular hollow tubes 4.Above circular hollow tube 4 and rotating shaft 1 between evenly be welded with 3 horizontally disposed upper strata spokes 2, below circular hollow tube 4 and rotating shaft 1 between evenly be welded with 3 horizontally disposed lower floor spokes 2, the every pair of corresponding up and down spoke 2 is positioned on the same vertical plane and is parallel to each other, and is provided with cylindrical inner ring hollow blade 5 between every pair of corresponding up and down spoke 2.All outer ring hollow blades 6 and inner ring hollow blade 5 all be arranged in parallel with rotating shaft 1.All outer ring hollow blades 6, all inner ring hollow blades 5, institute's elbow 7, two circular hollow tubes 4, all spokes 2 and rotating shafts 1 all are hollow-core construction, and the hollow parts of each parts communicates.
The hollow rotating shaft 1 of mixed stirring device of the present invention is that the cross section is positive circular thick-walled pipe; The cross section of the horizontal spoke of levels tubulose 2, two circular hollow tubes 4, outer ring hollow blade 6, inner ring hollow blade 5 and elbows 7 such as is at positive circle, ellipse or the rectangle of wall thickness.The junction of each parts of whole mixed stirring device all welds together.
As shown in Figure 1, during use, agitating device of the present invention is built in the mixer 9, rotating shaft 1 is arranged on mixer 9 central inner in vertical state; Agitating device of the present invention needs and has the transmission mechanism 10 and the two-way interior tubular type swivel joint 12 supporting uses of hollow spindle 11.The upper end of agitating device rotating shaft 1 of the present invention is equipped with transmission mechanism 10, and hollow spindle 11 upper ends of transmission mechanism 10 are connected with two-way interior tubular type swivel joint 12.Hollow spindle 11 lower ends of transmission mechanism 10 are provided with flange B13, flange A8 is cooperated with flange B13 and be fixed together.Drive hollow spindle 10 and agitating device rotating shaft of the present invention 1 rotation by transmission device 10, the rotation of rotating shaft 1 drives the gyration of whole paddle again by spoke 2, reach the purpose that stirs the liquid-solid phase material and form composite liquefied slip, slip moves in a circle with the direction of rotation of outer ring hollow blade 6 and inner ring hollow blade 5 and forms concavity whirlpool shown in L among Fig. 1, and the compound slip that stirs is discharged by the bed material blow-off valve 20 that is arranged on mixer 9 bottoms.As shown in Figure 2, the outer tube of two-way interior tubular type swivel joint 12 is provided with steam inlet 14, and interior pipe is provided with a plurality of steam by hole 15; Cavity 16 between steam inlet 14, outer tube and the interior pipe, steam communicate with each other by the inner chamber 17 of hole 15 and interior pipe; Condensation-water drain 18 in two-way on the tubular type swivel joint 12 is communicated with condensate pipe 19; The hollow rotating shaft 1 of the inner chamber 17 of interior pipe, the hollow spindle 11 of transmission mechanism 10 and agitating device of the present invention is interconnected; Condensate pipe 19 passes inner chamber 17, the hollow spindle 11 of transmission mechanism 10 and the hollow rotating shaft 1 of agitating device of the present invention of interior pipe, extends to the bottom of hollow rotating shaft 1 always.
During stirring, the steam inlet 14 of tubular type swivel joint 12 feeds high steam in two-way, steam enters in the inner chamber 17 of interior pipe by cavity 16 between outer tube and the interior pipe and steam by hole 15, enter again in the hollow rotating shaft 1 of the hollow spindle 11 of transmission mechanism 10 and agitating device of the present invention, steam continues to enter spoke 2, circular hollow tube 4 up and down, elbow 7, in outer ring hollow blade 6 and the inner ring hollow blade 5, make whole rotating shaft 1 and paddle be full of steam, in whipping process, the vapor (steam) temperature in the paddle has been replenished the temperature drop that the normal temperature powder material causes melt.Form condensed water after steam in the paddle and the material heat exchange, condensed water is discharged from the condensation-water drain 18 of two-way interior tubular type swivel joint 12 by condensate pipe 19.
The transmission mechanism 10 and the two-way interior tubular type swivel joint 12 that have hollow shaft 11 structures are existing mature technology, and multiple commodity for supporting selection are arranged on the market for industrial goods.
Mixed stirring device of the present invention both can be used for the chemical melt liquid-solid phase and mix, and also can be used for urea (or ammonium nitrate) fusion of solid particle.