Alumina mother liquor circulation evaporation device

Abstract

The utility model discloses an alumina mother liquor circulation evaporation device, including an MVR evaporator, a compressor and a heating chamber, and the compressor is connected between the MVR evaporator and the heating chamber, and one side of the MVR evaporator is connected with a multi-stage crushing structure, and the multi-stage crushing structure includes a protective cover, a feed chute, a primary crushing structure, a secondary crushing structure and a conveyor belt, and the primary crushing structure and the secondary crushing structure have the same composition structure, and the primary crushing structure and the secondary crushing structure both include a transmission box, a first reduction motor, a driving shaft, a driven shaft, a first gear, a second gear, a first crushing roller, a second crushing roller and a guide plate. The alumina mother liquor circulation evaporation device described in the utility model can perform multi-stage crushing of materials and improve the crushing quality through the primary crushing structure and the secondary crushing structure, and the spiral blades can facilitate further crushing of materials inside the guide pipe and improve the crushing quality.

Description

Technical Field

[0001] The utility model relates to the technical field of anhydrous aluminum oxide production, in particular to an aluminum oxide mother liquid circulation evaporation device. Background Art

[0002] Industrially produced aluminum hydroxide contains 10%-15% attached water. The roasting is carried out at 900-1250℃. Aluminum hydroxide undergoes a series of changes during the roasting process. When the temperature reaches 100-120℃, the attached water is completely evaporated. If the temperature is further increased, the crystallization water is removed and the crystal form of anhydrous aluminum oxide is transformed.

[0003] The secondary steam coming out of the MVR evaporator is compressed by the compressor, and its pressure, temperature and thermal enthalpy are increased. Then it is sent to the heating chamber of the evaporator to be used as heating steam to keep the liquid in a boiling state, while the heating steam itself is cooled into water. In this way, the steam that was originally going to be discarded is fully utilized, the latent heat is recovered, and the thermal efficiency is improved. The economy of raw steam is equivalent to 30 times that of multi-effect evaporation, and there is no need to supplement raw steam when the entire evaporation system is operating normally.

[0004] When anhydrous alumina crystals are produced, they are in a block structure, and they need to be crushed in the prior art. However, in the prior art, a hammer crusher is generally used for crushing, and the crushing effect is poor for a single crushing.

[0005] To this end, we propose an alumina mother liquor circulating evaporation device. Utility Model Content

[0006] 1. Technical issues to be resolved

[0007] In view of the deficiencies in the prior art, the utility model provides an alumina mother liquor circulating evaporation device, which has the advantages of multi-stage crushing and improved crushing efficiency, and can effectively solve the problems in the background technology.

[0008] (II) Technical solution

[0009] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: an alumina mother liquor circulation evaporation device, comprising an MVR evaporator, a compressor and a heating chamber, and the compressor is connected between the MVR evaporator and the heating chamber, and one side of the MVR evaporator is connected to a multi-stage crushing structure, and the multi-stage crushing structure comprises a protective cover, a feed chute, a primary crushing structure, a secondary crushing structure and a conveyor belt, and the primary crushing structure and the secondary crushing structure have the same composition structure, and the primary crushing structure and the secondary crushing structure both comprise a transmission box, a first reduction motor, a driving shaft, a driven shaft, a first gear, a second gear, a first crushing roller, a second crushing roller and a guide plate, The feed trough is fixedly installed on the middle part of the outer surface of one end of the protective cover, the primary crushing structure is installed on the outer surface of one end of the feed trough, the secondary crushing structure is fixedly installed on the outer surface of one side of the protective cover close to the feed trough, an arc-shaped trough chamber is provided at the bottom of the inner cavity of the feed trough, a second reduction motor is fixedly installed on the lower part of the outer surface of one side of the feed trough, a rotating shaft is connected to the outer surface of one end of the output shaft of the second reduction motor, a material guide pipe is fixedly installed on the outer surface of one end of the protective cover close to the feed trough, and the material guide pipe extends into the interior of the protective cover, a spiral blade is fixedly installed on the outer wall of the rotating shaft, and the rotating shaft and the spiral blade pass through the arc-shaped trough chamber and the material guide pipe.

[0010] Preferably, a sealed bearing is arranged between the rotating shaft and the feed trough, the rotating shaft is rotatably connected to the feed trough through the sealed bearing, a coupling is arranged between the rotating shaft and the second reduction motor, the outer surface of one end of the rotating shaft is fixedly connected to the outer surface of one end of the output shaft in the second reduction motor through the coupling, and the conveyor belt is installed at the lower part of the inner cavity of the protective cover.

[0011] Preferably, the number of the transmission box, the first reduction motor, the driving shaft, the driven shaft, the first gear, the second gear, the first crushing roller and the second crushing roller in the primary crushing structure and the secondary crushing structure is one group, and the number of the guide plates in the primary crushing structure and the secondary crushing structure is two groups, the two groups of transmission boxes are fixedly installed on the outer surface of one side of the protective cover close to one end of the feed trough and the outer surface of one end of the feed trough, and the four groups of guide plates are fixedly installed on the left and right sides of the upper part of the inner cavity of the feed trough and the left and right sides of the bottom of the inner cavity of the protective cover close to one end of the guide pipe.

[0012] Preferably, the first reduction motor is fixedly mounted on one end of the outer surface of one side of the transmission box, the first gear and the second gear are both located in the transmission box, the driving shaft is fixedly connected to the outer surface of one end of the output shaft in the first reduction motor, the first gear is fixedly mounted on the outer wall of one end of the first reduction motor, the second gear is fixedly mounted on the outer wall of one end of the driven shaft, and the second gear is located on the outer surface of one side of the first gear.

[0013] Preferably, the first crushing roller is located on one side of the second crushing roller, and the first crushing roller is fixedly mounted on the outer wall of the driving shaft, the second crushing roller is located on the outer wall of the driven shaft, and the first crushing roller and the second crushing roller are located on one side of the lower part of the guide plate.

[0014] Preferably, an outer surface of one side of the first gear meshes with an outer surface of one side of the second gear.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the utility model provides an alumina mother liquor circulating evaporation device, which has the following beneficial effects:

[0017] 1. The alumina mother liquor circulating evaporation device can perform multi-stage crushing on the material and improve the crushing quality by setting a primary crushing structure and a secondary crushing structure.

[0018] 2. The alumina mother liquor circulation evaporation device facilitates further crushing of the material inside the material guide pipe through the arranged spiral blades, thereby improving the crushing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The utility model is a schematic diagram of the overall structure of an alumina mother liquor circulating evaporation device.

[0020] Figure 2 The utility model is a schematic diagram of a multi-stage crushing structure in an alumina mother liquor circulating evaporation device.

[0021] Figure 3 The utility model is a schematic diagram of the structural decomposition of a multi-stage crushing structure in an alumina mother liquor circulating evaporation device.

[0022] Figure 4 It is a side cross-sectional view of a multi-stage crushing structure in an alumina mother liquor circulating evaporation device of the utility model.

[0023] In the figure: 1. MVR evaporator; 2. compressor; 3. heating chamber; 4. multi-stage crushing structure; 5. protective cover; 6. feed chute; 7. primary crushing structure; 8. secondary crushing structure; 9. conveyor belt; 10. transmission box; 11. first reduction motor; 12. driving shaft; 13. driven shaft; 14. first gear; 15. second gear; 16. first crushing roller; 17. second crushing roller; 18. guide plate; 19. arc trough chamber; 20. second reduction motor; 21. rotating shaft; 22. spiral blade; 23. guide pipe. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0025] This embodiment is an alumina mother liquor circulating evaporation device.

[0026] like Figure 1-4 As shown, it includes an MVR evaporator 1, a compressor 2 and a heating chamber 3, and the compressor 2 is connected between the MVR evaporator 1 and the heating chamber 3. One side of the MVR evaporator 1 is connected to a multi-stage crushing structure 4, and the multi-stage crushing structure 4 includes a protective cover 5, a feed chute 6, a primary crushing structure 7, a secondary crushing structure 8 and a conveyor belt 9. The primary crushing structure 7 and the secondary crushing structure 8 have the same composition structure. The primary crushing structure 7 and the secondary crushing structure 8 both include a transmission box 10, a first reduction motor 11, a driving shaft 12, a driven shaft 13, a first gear 14, a second gear 15, a first crushing roller 16, a second crushing roller 17 and a guide plate 18, and the feed chute 6 is fixedly installed on the protective cover. In the middle of the outer surface of one end of the cover 5, the primary crushing structure 7 is installed on the outer surface of one end of the feed trough 6, and the secondary crushing structure 8 is fixedly installed on the outer surface of one side of the protective cover 5 close to the feed trough 6. An arc-shaped groove chamber 19 is provided at the bottom of the inner cavity of the feed trough 6. A second reduction motor 20 is fixedly installed on the lower part of the outer surface of one side of the feed trough 6. A rotating shaft 21 is connected to the outer surface of one end of the output shaft of the second reduction motor 20. A material guide pipe 23 is fixedly installed on the outer surface of one end of the protective cover 5 close to the feed trough 6, and the material guide pipe 23 extends into the interior of the protective cover 5. A spiral leaf 22 is fixedly installed on the outer wall of the rotating shaft 21. The rotating shaft 21 and the spiral leaf 22 pass through the arc-shaped groove chamber 19 and the material guide pipe 23.

[0027] A sealed bearing is provided between the rotating shaft 21 and the feed trough 6, and the rotating shaft 21 is rotatably connected to the feed trough 6 through the sealed bearing. A coupling is provided between the rotating shaft 21 and the second reduction motor 20, and the outer surface of one end of the rotating shaft 21 is fixedly connected to the outer surface of one end of the output shaft in the second reduction motor 20 through the coupling. The conveyor belt 9 is installed at the lower part of the inner cavity of the protective cover 5; the number of the transmission box 10, the first reduction motor 11, the driving shaft 12, the driven shaft 13, the first gear 14, the second gear 15, the first crushing roller 16, and the second crushing roller 17 in the primary crushing structure 7 and the secondary crushing structure 8 is one group, and the number of the guide plates 18 in the primary crushing structure 7 and the secondary crushing structure 8 is two groups. The two groups of transmission boxes 10 are fixedly installed on the outer surface of one side of the protective cover 5 close to the feed trough 6 and the outer surface of one end of the feed trough 6, and the four groups of guide plates 18 are fixedly installed on the left upper part of the inner cavity of the feed trough 6 The right sides and the left and right sides of the bottom of the inner cavity of the protective cover 5 are close to one end of the guide tube 23; the first reduction motor 11 is fixedly mounted on one end of the outer surface of one side of the transmission box 10, the first gear 14 and the second gear 15 are both located in the transmission box 10, the driving shaft 12 is fixedly connected to the outer surface of one end of the output shaft in the first reduction motor 11, the first gear 14 is fixedly mounted on the outer wall of one end of the first reduction motor 11, the second gear 15 is fixedly mounted on the outer wall of one end of the driven shaft 13, and the second gear 15 is located on one side of the outer surface of the first gear 14; the first crushing roller 16 is located on one side of the second crushing roller 17, and the first crushing roller 16 is fixedly mounted on the outer wall of the driving shaft 12, the second crushing roller 17 is located on the outer wall of the driven shaft 13, and the first crushing roller 16 and the second crushing roller 17 are located on one side of the lower part of the guide plate 18; the outer surface of one side of the first gear 14 is meshed with the outer surface of one side of the second gear 15.

[0028] It should be noted that the utility model is a circulating evaporation device for alumina mother liquor. The MVR evaporator 1, compressor 2 and heating chamber 3 described in the text belong to the prior art. The secondary steam coming out of the MVR evaporator 1 is compressed by the compressor 2, and the pressure and temperature are increased, and the thermal enthalpy is increased. Then, it is sent to the heating chamber 3 of the evaporator to be used as heating steam, so that the liquid is kept in a boiling state, and the heating steam itself is cooled into water. In this way, the steam that was originally to be discarded is fully utilized. It is effectively known to technicians in the relevant technical field, and the details are not repeated here. The crystallized material is sent to the feed trough 6 and is crushed for the first time by the primary crushing structure 7. The primary crushing structure 7 has the same composition structure as the secondary crushing structure 8. The operation of the speed motor 11 drives the driving shaft 12 to rotate, the driving shaft 12 drives the first gear 14 to rotate, the first gear 14 drives the driven shaft 13 to rotate through the second gear 15, the driving shaft 12 and the driven shaft 13 drive the first crushing roller 16 and the second crushing roller 17 to rotate, so as to crush the material, and the crushed material enters the arc-shaped groove chamber 19 at the bottom of the feed trough 6, and the operation of the second speed reduction motor 20 drives the rotating shaft 21 to rotate, and the rotating shaft 21 drives the spiral blade 22 to rotate, and the spiral blade 22 transports the material and plays a role of grinding, so as to realize the second crushing, and then the material falls into the secondary crushing structure 8 through one end of the guide pipe 23 for the third crushing, and the crushed product is discharged through the conveyor belt 9.

[0029] It should be noted that, in this article, relational terms such as first and second (number one, number two), etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0030] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. An alumina mother liquor circulation evaporation device, comprising an MVR evaporator (1), a compressor (2) and a heating chamber (3), wherein the compressor (2) is connected between the MVR evaporator (1) and the heating chamber (3), characterized in that: A multi-stage crushing structure (4) is connected to one side of the MVR evaporator (1), and the multi-stage crushing structure (4) includes a protective cover (5), a feed trough (6), a primary crushing structure (7), a secondary crushing structure (8) and a conveyor belt (9), and the primary crushing structure (7) and the secondary crushing structure (8) have the same composition structure, and both the primary crushing structure (7) and the secondary crushing structure (8) include a transmission box (10), a first reduction motor (11), a driving shaft (12), a driven shaft (13), a first gear (14), a second gear (15), a first crushing roller (16), a second crushing roller (17) and a guide plate (18), and the feed trough (6) is fixedly installed at the middle part of the outer surface of one end of the protective cover (5), and the primary crushing structure (7) is installed at the feed trough (6). The secondary crushing structure (8) is fixedly mounted on the outer surface of one end of the material trough (6) of the protective cover (5), and the outer surface of one end of the protective cover (5) is close to the feeding trough (6). The bottom of the inner cavity of the feeding trough (6) is provided with an arc-shaped trough chamber (19). The lower part of the outer surface of one side of the feeding trough (6) is fixedly mounted with a second reduction motor (20). The outer surface of one end of the output shaft of the second reduction motor (20) is connected with a rotating shaft (21). The outer surface of one end of the protective cover (5) close to the feeding trough (6) is fixedly mounted with a material guide pipe (23), and the material guide pipe (23) extends into the interior of the protective cover (5). The outer wall of the rotating shaft (21) is fixedly mounted with a spiral blade (22), and the rotating shaft (21) and the spiral blade (22) penetrate the arc-shaped trough chamber (19) and the material guide pipe (23).

2. The alumina mother liquid circulating evaporation device according to claim 1, characterized in that: A sealed bearing is provided between the rotating shaft (21) and the feed trough (6), and the rotating shaft (21) is rotatably connected to the feed trough (6) via the sealed bearing. A coupling is provided between the rotating shaft (21) and the second reduction motor (20), and the outer surface of one end of the rotating shaft (21) is fixedly connected to the outer surface of one end of the output shaft in the second reduction motor (20) via the coupling. The conveyor belt (9) is installed at the lower part of the inner cavity of the protective cover (5).

3. The alumina mother liquid circulating evaporation device according to claim 2, characterized in that: The number of the transmission box (10), the first reduction motor (11), the driving shaft (12), the driven shaft (13), the first gear (14), the second gear (15), the first crushing roller (16), and the second crushing roller (17) in the primary crushing structure (7) and the secondary crushing structure (8) is one group, and the number of the guide plates (18) in the primary crushing structure (7) and the secondary crushing structure (8) is two groups. The two groups of the transmission boxes (10) are fixedly mounted on the outer surface of one side of the protective cover (5) close to one end of the feed trough (6) and the outer surface of one end of the feed trough (6), and the four groups of the guide plates (18) are fixedly mounted on the left and right sides of the upper part of the inner cavity of the feed trough (6) and the left and right sides of the bottom of the inner cavity of the protective cover (5) close to one end of the guide pipe (23).

4. The alumina mother liquid circulating evaporation device according to claim 3, characterized in that: The first reduction motor (11) is fixedly mounted on one end of the outer surface of one side of the transmission box (10); the first gear (14) and the second gear (15) are both located in the transmission box (10); the driving shaft (12) is fixedly connected to the outer surface of one end of the output shaft in the first reduction motor (11); the first gear (14) is fixedly mounted on the outer wall of one end of the first reduction motor (11); the second gear (15) is fixedly mounted on the outer wall of one end of the driven shaft (13); and the second gear (15) is located on one side of the outer surface of the first gear (14).

5. The alumina mother liquid circulating evaporation device according to claim 4, characterized in that: The first crushing roller (16) is located on one side of the second crushing roller (17), and the first crushing roller (16) is fixedly mounted on the outer wall of the driving shaft (12), the second crushing roller (17) is located on the outer wall of the driven shaft (13), and the first crushing roller (16) and the second crushing roller (17) are located on one side of the lower part of the guide plate (18).

6. The alumina mother liquid circulating evaporation device according to claim 5, characterized in that: One side outer surface of the first gear (14) and one side outer surface of the second gear (15) are meshed with each other.

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