CN2400760Y - Particle material cooling device - Google Patents

Abstract

The utility model discloses a particle material cooling device, which comprises a casing, a material feeding opening and a material discharging opening. The utility model is characterized in that the inner lower part of the material feeding opening is provided with a material scattering cone, and a cone body is provided with spirally distributed holes; the bottom of the cooling device is provided with a flow control mechanism which is composed of a plurality of flat tubes, and the upper part of the cooling device is provided with a regulating gate which is composed of a plurality of special-shaped cross-section groove plates; cold air enters the material layer above the regulating gate from the side surface at the lower part of the flat tubes of the cooling device through the flat tubes and the holes on the groove plates. The utility model is particularly suitable for cooling urea particles. The utility model has the advantages of small ground occupation, low energy consumption, and low rate of reduction.

Description

The granule materials refrigerating unit

The utility model relates to a kind of refrigerating unit, particularly a kind of granule materials refrigerating unit that is suitable for urea production.

At present, during China middle-size and small-size chemical fertilizers production urea, all adopt the natural ventilation prilling tower that material is cooled off.In recent years, because the development of chemical fertilizer technology and applying, its throughput increased substantially, and original design ability can reach 100,000 tons, considerably beyond original design ability now for producing 40000 tons of urea plants per year.Yet original granulation cooling tower can not satisfy the needs that improve output.Particularly at high temperature season, the cooled urea temperature of prilling tower is up to more than 80 ℃, considerably beyond the temperature of 60 degree that bear of packing bag.This fully easy efflorescence of refrigerative material and caking have a strong impact on the quality and the result of use of urea, become the big problem that output improves in the middle-size and small-size urea production of restriction enterprise.Be head it off, have in the prilling tower bottom and carry out air blast that because this air blast makes the interior air-flow of tower inhomogeneous, cooling-down effect is not obvious; Adopt the cooling of vibrated fluidized bed cooler, because vibration is arranged, and inhomogeneous cooling is even, and grain breakage is serious, and occupation area of equipment is big in addition, the energy consumption height, this technology is also inapplicable.

The purpose of this utility model provides a kind of granule materials refrigerating unit, and it can make the urea material temperature be lower than 60 ℃, and floor space is little, and energy consumption is low, and grain breakage is few.

Task of the present utility model is to realize like this, it comprises housing, opening for feed and discharge port, it is characterized in that: be provided with one in the opening for feed and close the wind feeding machine, there is a material spreading cone its below, have the hole that spiral distributes on the cone, the material spreading cone below is provided with a plurality of adjusting grid, its structure is the special-shaped slot cross-section plate that a bottom is not sealed, the top of plate longitudinally has equidistant hole, the two ends of regulating screen are separately fixed on two channel-section steels, each distance of regulating between the screen equates, respectively there are two rotor wheels to be fixed on the flat board of housing of refrigerating unit in the bottom of two channel-section steels, the right side of refrigerating unit housing is provided with the eccentric wheel that a reducing motor drives, connecting rod places in the hole of housing, one end and eccentric wheel are rotationally connected, the other end is connected with the adjusting screen, the below of regulating screen is provided with the flat tube identical with its quantity, its top and bottom longitudinally have equidistant hole, the hole is relative up and down, the two ends of flat tube are separately fixed on two channel-section steels, distance between each flat tube equates, be provided with rotor wheel places on the flat board that is fixed on the housing in the bottom of two channel-section steels, the housing in refrigerating unit left side is provided with a turbine screw mechanism, one end of leading screw links to each other with flat tube, the other end is connected with handwheel, on the refrigerating unit housing above the adjusting grid, be respectively equipped with low spacing window and high spacing window, be provided with storage bunker below flat tube, its bottom is provided with discharge port, also division plate can be set above adjustable plate.

This refrigerating unit is owing to adopted material slow landing in a negative pressure device all to contact with cooling draught, material is cooled off fully, thereby the material percentage of damage is extremely low, and the temperature of charge that prilling tower can be come out reduces 15-30 ℃, compared with prior art, has good cooling effect, material particles intensity advantages of higher.

Fig. 1 is the structural representation of granule materials refrigerating unit.

Drawing explanation: 1. close wind feeding machine opening for feed 2. cooler outlets 3. material spreading cones 4. upper limit windows 5. lower limit windows 6. handwheels 7. storage bunkers 8. division plates 9. and regulate grid 10. flat tubes 11. reducing motors 12. housings

Further describe embodiment of the present utility model in conjunction with above accompanying drawing.The granular urea that comes out from urea prilling tower passes through the top that travelling belt is delivered to the granule materials refrigerating unit, fall on the material spreading cone 3 through closing wind feeding machine opening for feed 1, closing the wind feeding machine can select according to the output size, when material along material spreading cone 3 to around during landing, part material is fallen the space of cone below from the aperture on the cone, in order to make material spilling even, fully and the freezing air heat-shift, the cone angle of material spreading cone is the 120-150 degree, cone bottom diameter should be 3: 4 with the ratio of refrigerating unit internal diameter, the hole that has spiral to distribute on the cone, the aperture is φ 2.5-3mm, percentage of open area is 15-20%.Regulate grid 9 for 5-8 that below material spreading cone 3, is provided with parallel discharging, its structure is a special-shaped groove face plate, the top longitudinally has the hole that spacing equates, the aperture is generally φ 1-1.5mmm, percentage of open area should remain on the scope of 6.5-8.5%, regulate the bottom of grid 9 and do not seal, the top that the two ends of adjusting grid 9 are welded in two channel-section steels respectively fuses the adjusting grid.Each spacing of regulating between grid should equate that the spacing size should determine according to the size of turnout.Calculate with 10 tons of output, spacing should be advisable at 25-35mm, on the channel-section steel downside that connects the adjusting grid, be respectively equipped with two rotor wheels, place on the flat board that is fixed on refrigerating unit housing 12, be respectively equipped with a flat tube 10 below each adjusting grid 9, the top dimension of flat tube 10 is identical with adjusting grid bottom size, and the spacing between each flat tube equates, the top of flat tube 10 and bottom longitudinally have equidistant hole, and the hole is relative up and down.The aperture on top is φ 1mm, and percentage of open area is 6.1%, and the aperture of bottom is φ 2mm, and percentage of open area is 7.1%, and the top that the two ends of flat tube are welded in two channel-section steels respectively makes it to link into an integrated entity, and constitutes a mass flow regulating mechanism.Regulating grid 9 bottom surfaces is about 2mm with the gap that flat tube pushes up, and on the two channel-section steel downsides that link together with flat tube two rotor wheels is arranged respectively, places on the flat board that is fixed on refrigerating unit housing 12.Material drops in the storage bunker 7 by space between the adjusting grid 9 and the space between the flat tube 10.Therefore, the size of material discharging depends on the size of regulating between the grid 9 covering flat tubes 10.According to the output size, by rotating handwheel 6 flat tube is moved, obtain a suitable gap, this gap is deposited highly the collection of material on adjusting grid 9 and is remained unchanged, this perfect condition generally speaking because the variation of various factors, the material collection is deposited height and can be changed.It is big that the material collection is deposited, and it is just long that it stops refrigerative time, however accumulate highly excessive after, freezing air increases by material bed resistance, airshed reduces, and cooling performance is reduced.Therefore, a reasonably height should be arranged, generally be advisable with 300-500mm.For keep this material accumulate the height, on housing 12 300 and the 500mm place respectively establish a glass port 4 and window 5.When height of materials reaches the upper limit height, can start reducing motor 11, make regulate grid and do about toward anti-motion, accelerate the material discharge rate.When material drops to lower limit window 5, close reducing motor 11.At spacing window place up and down one sensor can be set, get the signal of height of materials, the control that reducing motor is opened or closed, thus realize material discharging control automatically.Side on refrigerating unit top is provided with cold gas outlet 2 and links to each other with vacuum fan.When the air quantity of vacuum fan highly was 300-500mm for accumulating when material, the space on material bed top was a negative pressure, and its negative pressure value is 2000Pa, with this understanding, material can stop 6-8 minute, was cooled off fully, its temperature can descend 15-30 ℃, obtains the material of ideal temperature.Because a variety of causes, sometimes water cooler produces unstable air-flow in material bed, makes the material inhomogeneous cooling even, for avoiding this accidental situation about producing, can be on adjustable plate the material bed division plate 8 that is provided with, the cooling material of discharging from flat tube is dropped in the storage bunker 7 of bottom.

Claims (2)

1, the granule materials refrigerating unit, it comprises housing, opening for feed and discharge port, it is characterized in that: be provided with one in the opening for feed and close the wind feeding machine, there is a material spreading cone its below, have the hole that spiral distributes on the cone, the material spreading cone below is provided with a plurality of adjusting grid, its structure is the special-shaped slot cross-section plate that a bottom is not sealed, the top of plate longitudinally has equidistant hole, the two ends of regulating screen are separately fixed on two channel-section steels, each distance of regulating between the screen equates, respectively there are two rotor wheels to be fixed on the flat board of housing of refrigerating unit in the bottom of two channel-section steels, the right side of refrigerating unit housing is provided with the eccentric wheel that a reducing motor drives, connecting rod places in the hole of housing, one end and eccentric wheel are rotationally connected, the other end is connected with the adjusting screen, the below of regulating screen is provided with the flat tube identical with its quantity, its top and bottom longitudinally have equidistant hole, the hole is relative up and down, the two ends of flat tube are separately fixed on two channel-section steels, distance between each flat tube equates, be provided with rotor wheel places on the flat board that is fixed on the housing in the bottom of two channel-section steels, the housing in refrigerating unit left side is provided with a turbine screw mechanism, one end of leading screw links to each other with flat tube, and the other end is connected with handwheel, is respectively equipped with low spacing window and high spacing window on the refrigerating unit housing above the adjusting grid, be provided with storage bunker below flat tube, its bottom is provided with discharge port.

2, granule materials refrigerating unit according to claim 1 is characterized in that: on adjustable plate division plate can be set.

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