CN201161982Y

CN201161982Y - Mixer for chemical fertilizer fused mass slurry and powder materials

Info

Publication number: CN201161982Y
Application number: CNU2008200281946U
Authority: CN
Inventors: 孔亦周
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-01-25
Filing date: 2008-01-25
Publication date: 2008-12-10
Anticipated expiration: 2018-01-25

Abstract

The utility model discloses a mixing device of fertilizer melt slurry and powdery material, which comprises a container, a control valve rod is inserted in the container, the control valve rod is connected with an interlocking discharging device which is arranged at the bottom of the container, and a melting liquid charge pipe, an under-water centrifugal pump and a bilge pump are inserted in the container, wherein the discharge hole of the under-water centrifugal pump is connected with the inlet of the bilge pump through a connecting pipe, and the suction inlet of the bilge pump is further connected with the powder feeding device. The mixing device adopts the combined structure of the bilge pump and the centrifugal pump, which utilizes a fluid mixing form to replace a traditional slurry type machine stirring form, can adapt to fast mixture of ultra-fine powder material, and improve the evenness degree of the composite fertilizer slurring mixture. Composite fertilizer end product particles with high quality can be produced.

Description

The mixing device of chemical fertilizer molten slurry and powder material

Technical field

The utility model belongs to technical field of chemical, relates to the mixing device of a kind of composite chemical fertilizer molten slurry and powder material.

Background technology

The composite chemical fertilizer fused mass granulating technique, at first with material (urea or the ammonium nitrate) fusion of nitrogenous element, stir through mixing device with the powder material of the phosphorus element-containing that is heated to technological temperature and the powder material that contains potassium element then, be mixed into the compound slip of flowable liquid state with certain temperature, this process is called slurrying on technology.The slip that makes enters cooling media by special-purpose prilling spry with the form of drop; Cooling media can be that gas also can be and the immiscible liquid of material.This drop with refrigerant contact cooling process in be shrunk to ball shape and solidify out into solid particulate automatically, this technological process is called granulation.

The mixing device that the tradition pulping process adopts is the upright paddle structure of still formula.Melting charge slurry and powder material are sent into tempering tank respectively, and liquid material moves in a circle with the agitating vane sense of rotation of the upright oar whipping appts of still formula; It is the concavity whirlpool in the center of circle that liquid in the tempering tank presents with the stir shaft.The powder material that constantly drops on the slurries is involved in eddy-currents and does the turbulent motion of rolling to reach solid, liquid phase blended purpose with blade.Be not that all powder materials can both be involved in whirlpool in this process, the small portion powder material swims in the joint portion of mixing cell wall and motion liquid, this regional liquid motion is slow relatively, and powder material forms the ring-type accumulations because of reasons such as liquid humidity accumulate in the whirlpool top gradually; The ring of building up constantly contacts with the powder material that falls and covers, form the loose relatively powder reuniting thing of a hollow pie, when will caving in when supporting himself weight, the undercapacity of aggregate falls in the liquid, these cave in and fall into the intravital loose aggregate of liquid and can not be stirred blade in moment and all smash, also can not be soaked into fully by liquid and fully and liquid mixing in moment, the solids that exceeding of forming in these liquid, process required will cause the obstruction of prilling spry spray orifice.

The kind of chemical industry mixing device is a lot, and some device of composite fertilizer melt granulation process has solved the problem that powder material is reunited at present.But along with being growing more intense of commodity competition, have higher requirement to the quality of composite fertilizer's finished particle in market: more even such as the particulate nutrient, outward appearance has better surface smoothness etc.Be exactly the basic skills that improves the finished particle surface smoothness improves the fineness and the slurrying blended uniformity coefficient of powder material, total but thin more its specific surface area of powder material is just big more, and specific surface area is big more just to be unfavorable for fast and the melting charge slurry mixing more.In order to produce the composite fertilizer's finished particle that conforms to quality requirements, just must improve slurrying blended uniformity coefficient, therefore some enterprise has increased by one emulsifier unit operation again in the hope of improving slurry blended uniformity coefficient in existing slurrying hybrid technique, though this method has obtained composite fertilizer's finished particle of better quality, must bring the increase of production cost again.

Summary of the invention

The purpose of this utility model provides the mixing device of a kind of chemical fertilizer molten slurry and powder material, can adapt to the short mix of ultrafine powder material and improve composite fertilizer's slurrying blended uniformity coefficient.

The technical scheme that the utility model adopted is, the mixing device of chemical fertilizer molten slurry and powder material, comprise container, be inserted with a control valve rod in the container, the control valve rod is connected with the linked discharging device of container bottom setting, also be inserted with fused solution material pipe, submerged centrifugal pump and injector in the container, the discharge port of submerged centrifugal pump is connected with the import of injector by pipe connecting, and the suction port of injector also is connected with powder feeding device.

Feature of the present utility model also is,

Container is straight-through atmospheric uncovered structure.

Injector comprises suction chamber, trunnion and the diffuser pipe that connects successively, is provided with nozzle in the suction chamber.

Linked discharging device comprises the annular upflow tube valve seat of fixedlying connected with container bottom, be fixedly connected with the discharging bend pipe below the upflow tube valve seat, be provided with a movably hollow upflow tube above the upflow tube valve seat, the upflow tube lower central is provided with one group by 3～4 gussets and the orienting sleeve that sleeve pipe is formed, one group of that be made up of 3～4 gussets and open tube and upflow tube 4 concentric structural parts are being fixed in the upper surface of upflow tube 4, a planar annular valve base is arranged above the discharging bend pipe, being provided with one above the valve base of plane can be along the plane valve of axial-movement, the plane valve is positioned in the upflow tube, the plane valve is fixedlyed connected with the control valve rod, and the control valve rod passes the top of vertical propelling container from the open tube on upflow tube 4 tops.

Upflow tube top is hinged by open tube and upflow tube Weight plate, the top of control valve rod is hinged with control valve rod connecting plate, the end of upflow tube Weight plate and control valve rod connecting plate is hinged with journal stirrup respectively, the other end of control valve rod connecting plate and the top of connecting rod are hinged, the bottom of connecting rod and interstage valve handle are hinged, and the interstage valve handle is hinged with limiting plate again.

Powder feeding device comprises the feeder that the hopper that is connected with the injector suction port and hopper top are provided with, and hopper and injector suction port place are provided with a plate.

The inside of container is provided with 1～2 group of steam heating coil.

The exterior wall of container is provided with 1～2 group of steam heating semicanal or steam jacket.

The beneficial effects of the utility model are:

A. use working flow greater than the submerged centrifugal pump of actual granulation amount e Foerderanlage as workflow, highly beneficial to pulping process with bigger amount of liquid phase suction and mixed phase to less powder amount.

B. granulation process requires the normal pressure granulation, and uncovered structural container itself is exactly a good pressure relief device, and the hydrodynamicpressure of injector outlet is laid down by quick and complete in container.

C., the steam heating coil of 1～2 group of specific heat interchanging area is housed in the container, remedies the temperature drop that the normal temperature powder material causes to fused solution.

D. the jet of injector outlet will around liquid drive and do turbulent motion, help liquid to greatest extent with the steam heating coil heat exchange, can effectively prevent liquid, solid matter delaminating deposition in the composite solution simultaneously.

E. the interlock overflow discharging mechanism of installing in the container can guarantee the constant of the interior liquid level of container, and a constant statical head is most important to prilling spry, can guarantee that also submerged centrifugal pump has necessary pump housing immersion depth simultaneously.

F. the plane valve of the interlock overflow discharging mechanism of installing in the container, the composite solution in the time of can guaranteeing hesitation in the container can not flow out from discharge port; The steam of cleaning and preheating prilling spry also can't enter container by this discharge port simultaneously.

G. the plane valve of the interlock overflow discharging mechanism of installing in the container also can be with the composite solution fast evacuation in the container when technology is shut down.

Description of drawings

Fig. 1 is the structural representation of the utility model device, and wherein a is a front view, and b is a vertical view;

Fig. 2 is a B place partial enlarged drawing among Fig. 1 a;

Fig. 3 is the A-A sectional view of Fig. 1 b;

Fig. 4 is that the K of Fig. 1 a is to view;

Fig. 5 is the F-F sectional view of Fig. 1 b, is the working state schematic representation of interstage valve, and wherein a is a closing condition, and b is a working order, and c is the discharging state, and the lower right corner circled of every width of cloth figure is the partial enlarged drawing of valve body.

Among the figure, 1. submerged centrifugal pump, 2. container, 3. control valve rod, 4. upflow tube, 5. steam heating coil, 6. plane valve, 7. upflow tube valve seat, 8. plane valve base, 9. discharging bend pipe, 10. fused solution material pipe, 11. injectors, 12. feeders, 13. plates, 14. hoppers, 15. nozzle, 16. suction chambers, 17. trunnions, 18. diffuser pipes, 19. pipe connecting, 20. orienting sleeves, 21. interstage valve handles, 22. connecting rods, 23. limiting plate, 24. control valve rod connecting plates, 25. upflow tube Weight plates, 26. journal stirrups.

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is elaborated.

The utility model mixing device as shown in Figure 1, container 2 is uncovered, inserts injector 11, fused solution material pipe 10 and submerged centrifugal pumps 1 in the container 2, and the steam heating coil 5 of 1～2 group of specific heat interchanging area is installed in the container 2.

As shown in Figure 2, the bottom of container 2 is equipped with linked discharging device, this linked discharging device comprises: the annular upflow tube valve seat 7 of fixedlying connected with container 2 bottoms, be fixedly connected with discharging bend pipe 9 below the upflow tube valve seat 7, be provided with a vertically moving hollow upflow tube 4 above the upflow tube valve seat 7, a planar annular valve base 8 is arranged above the port of discharging bend pipe 9, and valve base 8 tops in plane are provided with one can be along the plane valve 6 of axial-movement; Upflow tube valve seat 7, upflow tube 4, plane valve 6 and plane valve base 8 are to be provided with one heart.Plane valve 6 is positioned in the upflow tube 4, and the control valve rod 3 of plane valve 6 is fixedlyed connected with plane valve 6 and passed outside the vertical propelling container 2 from the open tube on upflow tube 4 tops; Upflow tube 4 lower central are provided with one group by 3～4 gussets and the orienting sleeve 20 that sleeve pipe is formed, the effect of orienting sleeve 20 is that order control valve rod can slide along axis in orienting sleeve, and one group of that be made up of 3～4 gussets and open tube and upflow tube 4 concentric structural parts are being fixed in the upper surface of upflow tube 4.

As shown in Figure 3, injector 11 is made up of nozzle 15, suction chamber 16, trunnion 17 and diffuser pipe 18, nozzle 15 is arranged in the suction chamber 16, suction chamber 16 outside sides are equipped with powder material hopper 14, the discharge port of powder material hopper 14 is communicated with suction chamber 16, the discharge port of powder material hopper 14 is provided with plate 13, and the top of powder material hopper 14 is powder material dosing mechanisms 12.

The pump housing of submerged centrifugal pump 1 partly is arranged in the container 2, and the discharge port of submerged centrifugal pump 1 is connected with the import of injector 11 by pipe connecting 19, as shown in Figure 4.

As shown in Figure 5, the open tube on upflow tube 4 tops is with pin hinged upflow tube Weight plate 25, and the purpose that Weight plate 25 is set is to be the ring surface driving fit of its bottom and upflow tube valve seat 7 under action of gravity all the time of the situation underflow stream pipe 4 of the application of force unmanned.The control valve rod 3 of plane valve 6 passes from the inside of upflow tube 4 open tubes, the top of the control valve rod 3 of the plane valve 6 hinged control valve rod of pin connecting plate 24, the end of control valve rod connecting plate 24 and upflow tube Weight plate 25 is hinged with journal stirrup 26 usefulness pins respectively, the other end of control valve rod connecting plate 24 is used the top of pin articulated linkage 22, the bottom of the connecting rod 22 hinged interstage valve handle 21 of pin, the hinged limiting plate 23 of interstage valve handle 21 usefulness pins.When interstage valve handle 21 when pin rotates, can change the position of the control valve rod 3 of plane valve 6 by connecting rod 22.

During system works, powder material falls into powder material hopper 14 by material dosing mechanism 12; Urine base (urea) or nitro (ammonium nitrate) the fused solution nozzle 15 by injector 11 under the pressure effect of submerged centrifugal pump 1 sprays at a high speed, pressure can be converted into the speed energy, the velocity flow of spraying forms negative pressure region around nozzle 15, make suction chamber 16 internal pressures be lower than external pressure; Powder material in the powder material hopper 14 is inhaled into suction chamber 16 under the pressure difference effect.Mobile plate 13 just can change the size of powder material hopper 14 discharge ports, and this structure some powder material is all the time being covered discharge port fully, enters suction chamber 16 to prevent a large amount of air in the lump with powder material.

Fused solution and powder material form liquid, solid mixture and mix in trunnion 17 under the effect of high velocity liquid stream and form uniform composite opaque liquid at trunnion 17 places of injector 11, in diffuser pipe 18, mix once more then and carry out energy exchange, speed can be reduced into the pressure energy, and mixed solution is from the big end of diffuser pipe 18 leaks into fused solution in the container 2 with the back pressure form in.

Leaking into the fluid of container 2 actual is one jet, utilize this strand jet that the liquid around injector 11 outlets is driven and do turbulent motion, this structure can prevent that the composite fluids in the container 2 from producing the solid, liquid delaminating deposition, and make composite fluid to greatest extent with container 2 in steam heating coil 5 heat exchange.

Injector 11 has pressure from the liquid of diffuser pipe 18 big end ejections, and it must be the normal pressure granulation that granulation process requires, and the utility model uses open container 2 to come pressure release.Simultaneously the composite mortar technological temperature that must reach granulation and need could satisfy the granulation requirement, can't granulation if the temperature of composite mortar is lower than the required temperature of granulation process; Or composite mortar scrapes prilling spry, but finished particle is not spheroidal but tadpole shape or grain of rice shape and become inferior waste product.According to physical law: the material of differing temps carries out the transmission of heat by convection mass transfer, and the temperature head of low-temperature material and high-temperature material causes that the low-temperature material temperature raises, the high-temperature material temperature reduces.If therefore the powder material with normal temperature mixes with pyritous urea or ammonium nitrate fused solution, because the bigger temperature difference will make the compound slurry temperature of fusion descend, for guaranteeing the prilling temperature of melting charge slurry, be provided with steam heating coil 5 in the container 2, the outer wall at container 2 is provided with corresponding steam insulation semicanal or chuck simultaneously.

The top of the control valve rod 3 vertical propelling containers 2 of plane valve 6 and by linkage assembly control, linkage assembly divides discharging, works, cuts out three control shelves.As shown in Figure 5.When interstage valve handle 21 handle ends are oriented to when downward to closing shelves, when interstage valve handle 21 handle ends are oriented to level, be the work shelves, when interstage valve handle 21 handle ends are oriented to upwards, be the discharging shelves.

When interstage valve handle 21 is in when closing grade the ring surface driving fit of the bottom of upflow tube 4 and upflow tube valve seat 7, plane valve 6 and valve base 8 driving fits of discharge port plane.Composite molten liquid in the container 2 can not flow out from discharge port, and the steam of cleaning and preheating prilling spry also can't enter container 2 by discharge port simultaneously.

When interstage valve handle 21 is in the work shelves; the ring surface driving fit of the bottom of upflow tube 4 and upflow tube valve seat 7; control valve rod 3 drives plane valves 6 along the axis normal certain distance that moves up; plane valve 6 separates with discharge port plane valve base 8; compound slurry in injector 11 thorough mixing and container 2 after steam heating coil 5 heating enters the tablets press granulation by discharging bend pipe 9 in the overflow of the top of upflow tube 4 enters upflow tube 4.The top plan of upflow tube 4 is the height of liquid level in the container 2.

When interstage valve handle 21 is in the discharging shelves, control valve rod 3 drives plane valve 6 to be continued to move up along axis, the top of plane valve 6 touches the orienting sleeve 20 in the upflow tube 4, drive upflow tube 4 and move up and separate with the ring surface of upflow tube valve seat 7 along axis normal, the composite solutions in the container 2 directly draw off through discharge port from container 2 bottoms.

Claims

1. the mixing device of chemical fertilizer molten slurry and powder material, it is characterized in that, comprise container (2), be inserted with a control valve rod (3) in the container (2), control valve rod (3) is connected with the linked discharging device that container (2) bottom is provided with, also be inserted with fused solution material pipe (10), submerged centrifugal pump (1) and injector (11) in the container (2), the discharge port of described submerged centrifugal pump (1) is connected with the import of injector (11) by pipe connecting (19), and the suction port of injector (11) also is connected with powder feeding device.

2. mixing device according to claim 1 is characterized in that, described container (2) is uncovered.

3. mixing device according to claim 1 is characterized in that, described injector (11) comprises suction chamber (16), trunnion (17) and the diffuser pipe (18) that connects successively, is provided with nozzle (15) in the described suction chamber (16).

4. mixing device according to claim 1, it is characterized in that, described linked discharging device comprises the annular upflow tube valve seat (7) of fixedlying connected with container (2) bottom, be fixedly connected with discharging bend pipe (9) below the upflow tube valve seat (7), be provided with a movably hollow upflow tube (4) above the upflow tube valve seat (7), orienting sleeve (20) is arranged in the upflow tube (4), a planar annular valve base (8) is arranged above the discharging bend pipe (9), be provided with a movably plane valve (6) above the plane valve base (8), plane valve (6) is positioned in the upflow tube (4), plane valve (6) is fixedlyed connected with control valve rod (3), the top of the vertical propelling container (2) of control valve rod (3).

5. mixing device according to claim 4, it is characterized in that, described upflow tube (4) top is hinged by open tube and upflow tube Weight plate (25), the top of described control valve rod (3) is hinged with control valve rod connecting plate (24), the end of upflow tube Weight plate (25) and control valve rod connecting plate (24) is hinged with journal stirrup (26) respectively, the other end of control valve rod connecting plate (24) and the top of connecting rod (22) are hinged, the bottom of connecting rod (22) and interstage valve handle (21) are hinged, and interstage valve handle (21) is hinged with limiting plate (23) again.

6. mixing device according to claim 1, it is characterized in that, described powder feeding device comprises the feeder (12) that the hopper (14) that is connected with injector (11) suction port and hopper (14) top are provided with, and described hopper (14) is provided with a plate (13) with injector (11) suction port place.

7. mixing device according to claim 1 is characterized in that, the inside of described container (2) is provided with 1～2 group of steam heating coil (5).

8. mixing device according to claim 1 is characterized in that, the exterior wall of described container (2) is provided with 1～2 group of steam heating semicanal or steam jacket.