Drying device for aluminum oxide production

Abstract

The utility model discloses a drying device for aluminum oxide production, which comprises a pumping assembly, an atomizing assembly, a drying tower, a distribution assembly and a drying assembly which are sequentially connected, the pumping assembly is used for uniformly pumping aluminum oxide slurry to provide power, the atomizing assembly is used for atomizing high-pressure slurry into fine fog drops, and the drying assembly is used for drying the high-pressure slurry. The discharging end of the atomization assembly longitudinally extends into the drying chamber; the distribution assembly is used for uniformly distributing aluminum oxide slurry, the drying assembly is used for drying moisture in the slurry, and the discharging part of the atomization assembly, the distribution assembly and the drying assembly are sequentially arranged in the drying tower from top to bottom. High-pressure slurry is atomized by the atomization assembly, uniformly distributed by the distribution assembly and dried by the drying assembly, the slurry is uniformly distributed twice by the atomization assembly and the distribution assembly, and heat waste is reduced when the uniformly distributed slurry is dried.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of alumina production, and mainly relates to a drying device for alumina production. BACKGROUND

[0002] In the production process of aluminum compounds, sometimes it involves conveying fluid containing solid particles, such as bauxite powder mixed with liquid to form slurry. The main function of the drying tower is to remove water or solvent from the material with high humidity through heating, ventilation and other ways, so that the material can be dried; for example, the drying tower can remove the moisture in the liquid polyaluminum chloride to obtain the solid polyaluminum chloride product. The existing drying tower slurry distribution is not uniform enough, causing heat waste. SUMMARY

[0003] In view of the deficiencies of the prior art, the utility model provides a drying device for alumina production, which solves the technical problems that the high-pressure slurry in the pumping assembly is uniformly distributed twice through the atomizing assembly and the distribution assembly, ensuring that each place of the slurry can be uniformly dried; the drying assembly has good drying effect and simple process.

[0004] The technical problems solved by the utility model can be solved by the following technical solutions:

[0005] A drying device for alumina production, comprising a pumping assembly and a drying tower connected in sequence, the drying tower is used to provide a place for the drying process of alumina slurry, and the pumping assembly is used to provide power for the uniform pumping of alumina slurry to the atomizing assembly; characterized in that the drying device further comprises an atomizing assembly, a distribution assembly and a drying assembly, the atomizing assembly is used to atomize high-pressure slurry into fine mist droplets, the discharge end of the atomizing assembly longitudinally extends into the drying tower; the distribution assembly is used to uniformly distribute alumina slurry, and the drying assembly is used to dry the water in the slurry, the discharge part of the atomizing assembly, the distribution assembly and the drying assembly are sequentially arranged in the drying tower from top to bottom.

[0006] In one preferred embodiment of the utility model, the distribution assembly comprises a hot blast furnace, a hot blast fan, a main hot blast distributor and a plurality of auxiliary hot blast distributors which are in communication through hot blast pipes, the main hot blast distributor is vertically arranged at the top end of the longitudinally arranged main hot blast pipe, and the plurality of auxiliary hot blast distributors are circumferentially arrayed and upwardly inclined on the outer ring surface of the main hot blast pipe.

[0007] In an optimal embodiment of the present application, the drying assembly comprises a support frame, a cylindrical net and adsorbing filler, the cylindrical net is in the shape of a cylinder, the outer side of the support frame is fixedly arranged on the inner wall of the drying tower, the inner side of the support frame is in the shape of a cylinder without a cover, the support frame is used for supporting the bottom and the outer periphery of the cylindrical net, the outer diameter of the support frame is smaller than the inner diameter of the drying tower, and the bottom of the cylindrical net is provided with the adsorbing filler.

[0008] In an optimal embodiment of the present application, the distribution assembly further comprises a gas distributor, the gas distributor is used for uniformly distributing the passing gas, and the gas distributor is coaxially arranged in the support frame of the drying assembly and above the adsorbing filler.

[0009] In an optimal embodiment of the present application, the atomization assembly comprises a gas flow generator, a plurality of atomization nozzles and at least one atomization disc which are communicated through atomization pipes, the atomization disc longitudinally extends into the drying tower, and the atomization nozzles of the atomization disc are directed towards the main hot air distributor of the distribution assembly.

[0010] In an optimal embodiment of the present application, the pumping assembly comprises a main pipeline, a pair of branch pipelines, a pair of storage barrels and a pair of pressure pumps, the main pipeline is connected with the pair of branch pipelines through a tee joint, the other ends of the pair of branch pipelines are respectively connected with the two sides of the drying tower, the storage barrels and the pressure pumps are sequentially arranged on the branch pipelines, and the pressure pumps are used for sucking raw materials in a raw material tank to the storage barrels and then conveying the raw materials into the drying tower.

[0011] In an optimal embodiment of the present application, the drying device further comprises a conveying pipeline, a cyclone separator, a blower and a collection outlet, the top of the conveying pipeline is bent and extends into the inside of the drying tower, and the bottom of the conveying pipeline is sequentially and longitudinally connected with the cyclone separator, the blower and the collection outlet.

[0012] The present application has the advantages that the drying device for producing alumina is provided with a pumping assembly for providing power for alumina slurry, high-pressure slurry is subjected to atomization by an atomization assembly, uniform distribution by a distribution assembly and drying by a drying assembly, the slurry is uniformly distributed twice by the atomization assembly and the distribution assembly, so that the slurry can be uniformly dried everywhere, the slurry after uniform distribution is dried, so that the waste of heat is reduced, the drying assembly has good drying effect, and the drying device has compact overall structure, simple process and convenient operation. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 is a structural schematic view of the drying device for producing alumina.

[0014] Fig. 2It is the structural schematic view of the pumping assembly of the utility model.

[0015] Fig. 3 It is the structural schematic view of the output assembly of the drying device for alumina production.

[0016] Reference Signs:

[0017] 10 drying tower, pumping assembly: 11 main pipeline, 12 tee joint, 13 branch pipeline, 14 storage cylinder, 15 pressure pump.

[0018] Atomization assembly: 21 atomization pipe, 22 atomization disc, distribution assembly: 31 hot air pipe, 32 main hot air distributor, 33 auxiliary hot air distributor, 34 gas distributor.

[0019] Drying assembly: 41 support frame, 42 cylindrical net, 43 adsorption filler, 51 conveying pipeline, 52 cyclone separator, 53 air blower, 54 collection outlet. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, purposes and effects realized by the utility model easy to understand, the utility model is further described below in combination with specific drawings.

[0021] Referring to Figs. 1 to 3 , the drying device for alumina production shown in the figure comprises a pumping assembly, an atomization assembly, a drying tower 10, a distribution assembly and a drying assembly connected in sequence, the drying tower 10 is used for providing a place for the drying process of alumina slurry, the pumping assembly is used for providing power for the uniform pumping of the atomization assembly, the atomization assembly is used for atomizing high-pressure slurry into fine mist droplets, the discharge end of the atomization assembly longitudinally extends into the drying tower, the distribution assembly is used for uniformly distributing alumina slurry, and the drying assembly is used for drying the water in the slurry, the discharge part of the atomization assembly, the distribution assembly and the drying assembly are sequentially arranged in the drying tower 10 from top to bottom.

[0022] The pumping assembly of the utility model provides power for alumina slurry, high-pressure slurry is atomized by the atomization assembly, uniformly distributed by the distribution assembly and dried by the drying assembly, the atomization assembly and the distribution assembly uniformly distribute the slurry twice, so that each part of the slurry can be uniformly dried, the uniformly distributed slurry is dried again, heat waste is reduced, the drying effect of the drying assembly is good, and the drying device has compact overall structure, simple process and convenient operation.

[0023] Further, the atomization assembly includes a gas flow generator, a plurality of atomization nozzles, and at least one atomization disc 22, which are communicated through the atomization pipe 21 respectively. The atomization disc 22 longitudinally extends into the drying tower 10, and the atomization nozzles of the atomization disc 22 are directed towards the main hot air distributor 32 of the distribution assembly. The atomization assembly described above atomizes the high-pressure slurry into fine mist droplets, so as to be fully contacted with the hot air in the drying tower, and realizes rapid drying.

[0024] In the preferred embodiment, the distribution assembly includes a hot air furnace, a hot air machine, the main hot air distributor 32, and a plurality of auxiliary hot air distributors 33, which are communicated through the hot air pipe 31 respectively. The main hot air distributor 32 is vertically arranged at the top end of the longitudinally arranged main hot air pipe 31, and the plurality of auxiliary hot air distributors 33 are circumferentially arranged and upwardly inclined on the outer ring surface of the main hot air pipe 31.

[0025] Further, the distribution assembly further includes a gas distributor 34, which is used for uniformly distributing the passing gas. The gas distributor 34 is coaxially arranged in the support frame 41 of the drying assembly and above the adsorption filler 43.

[0026] The main hot air distributor 32 described above uniformly distributes the atomized slurry in the drying tower, ensures that the atomized slurry can be uniformly heated and rapidly evaporate moisture. The plurality of auxiliary hot air distributors 33 are used for uniformly distributing the peripheral atomized slurry again; and the hot air blown out by the main hot air distributor 32 and the plurality of auxiliary hot air distributors 33 also slightly increases the temperature in the drying tower 10.

[0027] In the preferred embodiment, the drying assembly includes a support frame 41, a cylindrical net 42, and an adsorption filler 43. The cylindrical net 42 is in a cylindrical shape. The outer side of the support frame 41 is fixedly arranged on the inner wall of the drying tower 10, and the inner side of the support frame 41 forms a coverless cylinder. The support frame 41 is used for supporting the bottom and the outer periphery of the cylindrical net 42. The outer diameter of the support frame 41 is smaller than the inner diameter of the drying tower 10. The bottom of the cylindrical net 42 is provided with the adsorption filler 43.

[0028] The inside of the cylindrical net 42 is used for filling the adsorption filler 43, so as to ensure that the slurry passing through the cross section of the drying tower 10 can be dried and can be sufficiently dried.

[0029] In the preferred embodiment, referring to Fig. 2 The pumping assembly includes a main pipeline 11, a pair of branch pipelines 13, a pair of storage cylinders 14, and a pair of pressure pumps 15. The main pipeline 11 is connected with the pair of branch pipelines 13 through the three-way joint 12. The other ends of the pair of branch pipelines 13 are respectively connected with the two sides of the drying tower 10. The storage cylinder 14 and the pressure pump 15 are sequentially arranged on the branch pipeline 13. The pressure pump 15 is used for sucking the raw material in the raw material tank to the storage cylinder 14, and then conveying the raw material to the drying tower 10. Specifically, the pair of pressure pumps 15 are a pair of air cylinders, which are sensitive in action, have sufficient power and suction.

[0030] The branch pipes 13, the storage tanks 14 and the pressure pumps 15 of the above pumping assembly are respectively provided with a pair, so as to respectively flow the raw materials in the raw material tank into the two sides of the drying tower 10.

[0031] In the preferred embodiment, the drying device further comprises a conveying pipeline 51, a cyclone separator 52, a blower 53 and a collection outlet 54. Fig. 3 When the drying assembly is dried, the cylindrical net 42 is removed, so as to facilitate the conveying pipeline 51 to convey the dried alumina powder; the dried powder is subjected to gas-solid separation through the cyclone separator, the solid powder is collected, and the gas is discharged through the filter.

[0032] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and equivalents thereof.

Claims

1. A drying apparatus for alumina production, comprising a pumping component and a drying tower connected in sequence, wherein the drying tower provides a space for the drying process of alumina slurry, and the pumping component provides power to the atomizing component for uniformly pumping the alumina slurry; characterized in that, The drying device further includes an atomizing component, a distribution component, and a drying component. The atomizing component is used to atomize the high-pressure slurry into fine droplets, and the discharge end of the atomizing component extends longitudinally into the drying chamber. The distribution component is used to evenly distribute the alumina slurry, and the drying component is used to dry the moisture in the slurry. The discharge part of the atomizing component, the distribution component, and the drying component are arranged sequentially from top to bottom in the drying tower.

2. The drying apparatus for alumina production as described in claim 1, characterized in that, The distribution assembly includes a hot air furnace, a hot air blower, a main hot air distributor, and several auxiliary hot air distributors, which are connected by hot air pipes. The main hot air distributor is vertically installed at the top of the longitudinally arranged main hot air pipe, and several auxiliary hot air distributors are arranged in a circumferential array and tilted upward on the outer ring surface of the main hot air pipe.

3. The drying apparatus for alumina production as described in claim 1, characterized in that, The drying assembly includes a support frame, a cylindrical mesh, and adsorption packing material. The cylindrical mesh is cylindrical. The outer side of the support frame is fixedly disposed on the inner wall of the drying tower, and the inner side of the support frame forms an open cylindrical shape. The support frame is used to support the bottom and outer periphery of the cylindrical mesh. The outer diameter of the support frame is smaller than the inner diameter of the drying tower. The adsorption packing material is disposed at the bottom of the cylindrical mesh.

4. The drying apparatus for alumina production as described in claim 3, characterized in that, The distribution assembly further includes a gas distributor for uniformly distributing the passing gas. The gas distributor is coaxially disposed within the support frame of the drying assembly, above the adsorption packing.

5. A drying apparatus for alumina production as described in claim 2, characterized in that, The atomizing assembly includes an airflow generator connected by an atomizing pipe, a plurality of atomizing nozzles, and at least one atomizing disc. The atomizing disc extends longitudinally into the drying tower, and the atomizing nozzles of the atomizing disc face the main hot air distributor of the distribution assembly.

6. The drying apparatus for alumina production as described in claim 1, characterized in that, The pumping assembly includes a main pipeline, a pair of branch pipelines, a pair of storage cylinders, and a pair of pressure pumps. The main pipeline is connected to the pair of branch pipelines via a tee connector, and the other ends of the pair of branch pipelines are respectively connected to the two sides of the drying tower. The storage cylinders and pressure pumps are sequentially arranged on the branch pipelines. The pressure pumps are used to draw the raw materials in the raw material tank into the storage cylinders and then transport them into the drying tower.

7. The drying apparatus for alumina production as described in claim 1, characterized in that, The drying device also includes a conveying pipe, a cyclone separator, a blower, and a collection outlet. The top of the conveying pipe is curved and extends into the interior of the drying tower, and the bottom of the conveying pipe is longitudinally connected to the cyclone separator, the blower, and the collection outlet in sequence.

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