Device for producing granulated materials

FIELD: granulating engineering.

SUBSTANCE: device comprises vertical cylindrical housing, gas-distributing grate, vertical gas-supplying branch pipe coaxially secured inside it, tangential gas-supplying branch pipe mounted in the top section of the housing, branch pipe for supplying of dispersed material, and branch pipe for discharging granules. The vertical gas-supplying branch pipe receives the nozzle for spraying pulp or melt. The top section of the housing receives the axial gas-discharging branch pipe provided with a conical funnel and deflector. The tangential gas-supplying branch pipe is connected with the branch pipe for supplying dispersed material. The plane of the exit section of the branch pipe for supplying dispersed material is perpendicular to the axis of the tangential gas-supplying branch pipe. The deflector is made of a rotation body defined by two coaxial conical surfaces, inner surface and outer surface. The device is provided with valve gates to control the process. The valve gates are mounted in the gas-supplying pipe lines.

EFFECT: enhanced efficiency.

1 dwg

 

The invention relates to devices for granular products by atomization of the slurry solution or melt on a weighted layer of dispersed material and can be used in chemical, metallurgical, building materials and other related industries.

Closest to the claimed object is apparatus for granular products, comprising a vertical cylindrical casing, gas grill, fortified it coaxial vertical gas-feeding nozzle, tangential gas-feeding nozzle, installed in the upper part of the body, a nozzle for atomization of the slurry or melt inside vertical gas-feeding pipe, the upper end of which is located above the gas distribution grid at the height of the fluidized bed, axial exhaust pipe connecting the upper part of the casing and provided with a conical funnel with a cylindrical shell at its end and with the inner cone nozzle for supplying dispersed material and a nozzle for discharging granules (patent Of the Russian Federation No. 2060810, 01J 2/16 - prototype).

The disadvantages of the known apparatus should be attributed primarily to the difficulty of process control in the presence of three gas-feeding streams and two product streams with different humidity: without odny dispersed material and a liquid solution or melt. This leads to the formation of both small and large-sized product that, in turn, reduces the output of the commodity fraction and increases the load on the crushing and screening equipment.

The technical result - improving the efficiency of the granulation process.

This is achieved by an apparatus for producing granulated products, comprising a vertical cylindrical casing, gas grill, fortified it coaxial vertical gas-feeding nozzle, tangential gas-feeding nozzle, installed in the upper part of the body, a nozzle for atomization of the slurry or melt, axial exhaust pipe connecting the upper part of the casing and provided with a conical funnel with a cylindrical shell at its end and with the inner cone nozzle for supplying dispersed material and a nozzle for discharging granules, a gas-feeding pipe connected to the pipe for supplying dispersed material so that the cut plane of the nozzle is perpendicular to the axis of the gas-feeding pipe, and a pipe for supplying dispersed material is to the axis of the gas-feeding nozzle at an angle "a", lying in the optimal interval values: a=0...45°and to the inner surface of the funnel by means of at least two rods coaxially funnel fixed obtect is l, made in the form of a body of rotation formed by two coaxial conical surfaces: outer conical surface and an inner conical surface, and the cylindrical shell is a cylindrical body with an external diameter D of the annular gap "s"lying in the optimal range of values: s=(0,1...0,3)D, and the end of the shell is lower fairing, and the bottom plane of the fairing is located towards the end of the cylindrical shell with an outer diameter of D1at a distance "u"lying in the optimal range of values: u=(0,1 0,05...) D1while vertical gas-feeding pipe is connected by means of a cone with the surface of the grating, and the coaxial cone is a cone with a gap "t" between them lying in the optimal range of values: t=(0,1 0,01...) D, the management of the process in the presence of three gas supplying flow through the Central backbone with the use of dampers that are installed on separate branches of the gas supplying flow.

The drawing shows apparatus for producing granulated products.

The apparatus includes a vertical cylindrical housing 1 with tangentially mounted in the upper part of the gas-feeding pipe 1 connected to the pipe 3 for supplying dispersed material so that the plane of the cutting nozzle 3 is perpendicular to the axis of the pipe 2. The pipe 3 is located to the axis of the pipe 2 at an angle "a", lying in the optimal interval values: a=0...45°. Axial exhaust pipe 7 is connected coaxially to the housing 1 in its upper part and has a cone 10, mounted on the exhaust pipe 7 from the side facing the inside of the apparatus, and connected with a cylindrical shell 11, located at the end of the funnel 10. To the inner surface of the funnel 10 by at least two rods 19, coaxially funnel 10 is fixed fairing 12, made in the form of a body of rotation formed by two coaxial conical surfaces: external conical surface 17 and the inner conical surface 18. Cylindrical shell 11 is located relative to the cylindrical body 1 with the outer diameter D Coliseum gap "s"lying in the optimal range of values: s=(0,1...0,3)D. the End of the shell 11 is located below the fairing 12, and the bottom plane of the fairing 12 is located towards the end of the cylindrical shell 11 with an outer diameter of d1at a distance "U"lying in the optimal range of values: u=(0,1 0,05...) D1.

In the lower part of the apparatus is a gas grill 4 to create a fluidized bed, the pipe 5 for discharging granules, pipe 6 for supplying under a gas grill, vertical gas-feeding pipe 8, is fixed in R is the brush 4 coaxially to the housing 1 and provided with a nozzle 9 for atomization of the slurry solution or melt. Vertical gas-feeding pipe 8 is connected by means of a cone 15 with the surface of the grating 4 and the coaxial cone 15 is a cone 16 with a clearance "t" between them lying in the optimal range of values: t=(0,1 0,01...) D. In the lattice 4 slotted holes for gas flow in the gap "t" between the cones 15 and 16. The end of pipe 8 is located at the height of the fluidized bed, and an end face of the cone 16 is located below the end of pipe 8. The management process in the presence of three gas supplying flow through a Central pipe 20 with the use of flaps 21, 22, 23, 24, are installed on separate branches of the gas supplying flow.

The parameters obtained by the calculation apparatus for drying and granulation of a solution of nicotinic acid (vitamin PP) under the following conditions: melting point 196°C, the temperature of thermal decomposition 425°C, the density of the granules 1400 kg/m3the specific heat capacity of the granules to 0.88 kJ/kg·K, the total specific heat concentration and crystallization 835 kJ/kg, the concentration of the processing solution 16%, moisture of the finished product not more than 0.2%, average granule size of 2 mm To obtain 1000 tonnes of finished product should be processed 6000 t 16%aqueous solution. When the operation mode 6800 h in year performance of the device is: recyclable solution 6000×103/6800=882 kg/h of finished product: 1000×1036800=147 kg/h, on the evaporated moisture 882-147=735 kg/h

The apparatus operates as follows.

In the housing 1 through a tangential inlet 2 serves peripheral gas flow, and through pipe 3 - dispersed material, which gas flow is distributed along the wall of the housing 1 and in conjunction with peripheral swirling gas flow through the gap between the housing 1 and the shell 11 moves down along a helical line. When this is heated (in the atomization of the slurry) or cooling (in the atomization of the melt) of the material of the peripheral gas flow is fed into the fluidized bed created by the gas introduced through the pipe 6 and the gas distribution grid 4. The gas stream introduced through the openings in the grating 4 and the gap between the cones 15 and 16, the dispersed material is discharged from the fluidized bed in an annular curtain of dispersed material moving upwards under the influence of the gas flow is introduced through the pipe 13, the swirler 14 and the nozzle 8. To disperse the material in the annular curtain through the nozzle 9 rasplivaetsa pulp (solution) when the supply in the apparatus of hot gas through the pipe 8 and the implementation drying-granulation or rasplivaetsa melt by cold gas and the implementation of cooling of the melt. The Central flow under the influence of the fairing 12 is deflected to the periphery under the influence of a peripheral thread is twisted, the mother particles is La are separated in the peripheral stream, which they return to the fluidized bed. Re-circulating in the apparatus of the dispersed material being consolidated with the formation of granules, which are derived from the fluidized bed through pipe 5, and the exhaust gases are removed through the gap formed by the shell 11 and the cone 12, the funnel 10 and fairing 12, and then through pipe 7.

Apparatus for granular products, comprising a vertical cylindrical casing, gas grill, fortified it coaxial vertical gas-feeding nozzle, tangential gas-feeding nozzle, installed in the upper part of the body, a nozzle for atomization of the slurry or melt inside vertical gas-feeding pipe, the upper end of which is located above the gas distribution grid at the height of the fluidized bed, axial exhaust pipe connecting the upper part of the casing and provided with a conical funnel with a cylindrical shell at its end and with a fairing, a pipe for supplying dispersed material and a nozzle for discharging granules, wherein the apparatus is further provided with dampers installed on a gas-feeding pipes, tangential gas-feeding pipe connected to the pipe for supplying dispersed material so that the cut plane of the nozzle for supplying dispersed mA is Arial perpendicular to the axis of the tangential gas-feeding nozzle, and to the inner surface of the funnel by means of at least two rods coaxially funnel fixed fairing, made in the form of a body of rotation formed by two coaxial conical surfaces: outer conical surface and an inner conical surface, and the cylindrical shell is a cylindrical body with an external diameter D of the annular gap s, and s=(0,1-0,3)D, and the end of the shell is lower fairing, with vertical gas-feeding pipe is connected by means of a cone with the surface of the grating, and the coaxial cone is a cone with a gap t between them, and t=(0,01-0,1)D.



 

Same patents:

FIELD: inorganic compounds technologies.

SUBSTANCE: granulated calcium chloride is prepared in fluidized-bed vessel, wherein fluidized bed is created by flue gas flow at bed temperature 150-200°C, gas flow velocity in the bed 2.5-3.0 m/s, and hydraulic resistance in bed 500-700 kg/m2. Granules are sprayed with 46-50% calcium chloride solution, which was preliminarily concentrated by leaving gas heat and further concentrated by dissolving dust fractions.

EFFECT: achieved uniform granulometric composition, increased strength of granules, and reduced moisture content therein.

1 dwg, 1 tbl

FIELD: chemical industry; food industry; pharmaceutical industry; other industries; methods of deposition of coatings on the particles of the bulk materials.

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FIELD: chemical industry; chemical-pharmaceutical industry; devices of coating of loose materials.

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FIELD: inorganic compounds technologies.

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FIELD: chemical industry; chemical-pharmaceutical industry; devices of coating of loose materials.

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EFFECT: the invention ensures production of the uniform coating on each particle and the continuous withdrawal of the ready particles from the zone of heating at an equal residence time in it of each particle.

FIELD: methods of granulation of carbamide, for example in fluidized layer and fluidized-bed granulators.

SUBSTANCE: proposed method includes forming fluidized bed of seeding particles (S1) of agent to be granulated with essentially horizontal plane (P) and delivery of continuous flow (L) of fluid medium containing mother liquor at simultaneous forming of solid vortex (V) in fluidized bed with essentially horizontal axis, upper zone (Z1) where seeding particles are humidified and solvent contained in mother liquor is evaporated and lower zone (Z2) where mother liquor is hardened.

EFFECT: possibility of obtaining granules in narrow range of granulometric composition.

16 cl, 5 dwg

FIELD: icing protection.

SUBSTANCE: invention relates to production of substances preventing icing and accelerating thawing of snow and ice covers. Agent according to invention represents granules, each of which is made with internal sodium chloride nucleus and having external shell of calcium chloride, the latter additionally containing corrosion inhibitor so that composition of granules is as follows: 10-90% sodium chloride, 10-90% calcium chloride, and 0.5-20% corrosion inhibitor. Spraying of calcium chloride solution onto sodium chloride particles 0.5-5 mm in size is effected successively in direction of movement of sodium chloride particles along drying chamber at 130-150°C and 2-3 m/sec at the beginning to 170-190°C and 3-4 m/sec at the end.

EFFECT: increased melting and permeating power of granules and reduced dust escape and specific power consumption in drying operation.

3 cl, 2 dwg, 3 tbl, 2 ex

FIELD: chemical industry; food industry; pharmaceutical industry; other industries; methods of deposition of coatings on the particles of the bulk materials.

SUBSTANCE: the invention is pertaining to the method of deposition of coatings on the particles of the bulk materials and may be used in chemical, food, pharmaceutical and other industries. The technical result of the invention is the increased efficiency and the improved quality of the product. The method of deposition of coatings on the particles of the bulk materials provides for the coating melt atomization of a melt of cover by the gas heated above the fusion point of the coating material into the liquated layer of the particles of the bulk material. The bulk material preliminary is heated up to the temperature of 0.5-0.6 of the fusion points of the coating material by the flow of the fluidizing agent. At dosage of the melt the temperature in the liquefied layer of the bulk material makes no more than 0.6-0.8 of the temperature of the coating materials fusion points. After termination of the batching of the melt conduct the gradual reduction of the temperature of the layer of the material up to the temperature of the environment.

EFFECT: the invention ensures the increased efficiency and the improved quality of the products.

3 cl, 1 ex

FIELD: inorganic compounds technologies.

SUBSTANCE: granulated calcium chloride is prepared in fluidized-bed vessel, wherein fluidized bed is created by flue gas flow at bed temperature 150-200°C, gas flow velocity in the bed 2.5-3.0 m/s, and hydraulic resistance in bed 500-700 kg/m2. Granules are sprayed with 46-50% calcium chloride solution, which was preliminarily concentrated by leaving gas heat and further concentrated by dissolving dust fractions.

EFFECT: achieved uniform granulometric composition, increased strength of granules, and reduced moisture content therein.

1 dwg, 1 tbl

FIELD: granulating engineering.

SUBSTANCE: device comprises vertical cylindrical housing, gas-distributing grate, vertical gas-supplying branch pipe coaxially secured inside it, tangential gas-supplying branch pipe mounted in the top section of the housing, branch pipe for supplying of dispersed material, and branch pipe for discharging granules. The vertical gas-supplying branch pipe receives the nozzle for spraying pulp or melt. The top section of the housing receives the axial gas-discharging branch pipe provided with a conical funnel and deflector. The tangential gas-supplying branch pipe is connected with the branch pipe for supplying dispersed material. The plane of the exit section of the branch pipe for supplying dispersed material is perpendicular to the axis of the tangential gas-supplying branch pipe. The deflector is made of a rotation body defined by two coaxial conical surfaces, inner surface and outer surface. The device is provided with valve gates to control the process. The valve gates are mounted in the gas-supplying pipe lines.

EFFECT: enhanced efficiency.

1 dwg

FIELD: chemistry.

SUBSTANCE: application contains the description of method of granulating in fluidised bed and obtaining the final granules of certain substance in the so called vertically growing granulating fluidised bed which is formed and maintained by the appropriate flow of fluidising air from which the final granules are poured into the collector under excess pressure and then unloaded from it.

EFFECT: simplification and cost reduction of maintenance of unloading final granules from collector; secure preparation and preservation of monodisperse final granules of specified size.

7 cl, 3 dwg

FIELD: technological processes.

SUBSTANCE: invention concerns granulation method in fluidised layer for various substances, such as carbamide, ammonium nitrate, ammonium chloride and similar substances viable to granulation. Particularly invention concerns method of granulation in fluidised layer with temperature adjusted by hot air feed, and to granulation plant for implementation of the method. During granulation of a certain substance in fluidised layer at adjustable temperature, finished hot granules are selected from fluidised granulation layer and cooled down in fluidised cooling layer continuously formed and sustained by fluidising air flow. At least a part of fluidising air leaving cooling fluidised layer of finished granules is fed to fluidised granulation layer. Cooling and granulation fluidised layers are positioned in sequence against air flow passing through them. Granulation plant used in the described method includes self-carrying construction with partition serving as support for fluidised granulation layer. Under the partition a step away from it, a base-forming sheet serving as support for fluidised cooling layer is located. Fluidised granulation and cooling layers interface over a perforated, grid, mesh or other gas-permeable partition. Finished granules are poured from fluidised granulation layer into fluidised cooling layer over transition stack. Devices of fluidised air feed and distribution in internal cavity of self-carrying construction are located under base-forming sheet.

EFFECT: reduced total energy expenditure required to maintain fluidised layer temperature at specified level sufficient for optimal granulation process finish.

10 cl, 2 dwg

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