Improved dissolved ore pulp flash evaporator

Abstract

The utility model provides an improved dissolved ore pulp flash evaporator which comprises a flash tank, one side of the flash tank is communicated with a breather pipe, the bottom of the breather pipe is communicated with an air diffusion cover, the top of the breather pipe is communicated with a steam inlet pipe through a flange, one side of the flash tank is provided with a filter box, and the filter box is communicated with a steam outlet pipe through a flange. One side of the filter box is communicated with the flash tank through a first pipeline, the other side of the filter box is communicated with a raw material inlet pipe through a second pipeline, a plurality of filter screen plates are mounted in the filter box at intervals, a mounting seat is arranged in the center of the interior of the flash tank, a stirring shaft is movably arranged on the mounting seat, and a stirring shaft is arranged on the stirring shaft. The ore pulp flash evaporator solves the problems that when an existing ore pulp flash evaporator is used, a primary flash evaporation tank of the existing ore pulp flash evaporator is mostly lack of an ore pulp filtering structure, and therefore after the existing ore pulp flash evaporator is used for a long time, a large number of impurities in ore pulp can be attached to the interior of the flash evaporation tank, and the follow-up flash evaporation speed is affected.

Description

Technical Field

[0001] The utility model relates to the field of pulp flash evaporators, in particular to an improved digestion pulp flash evaporator. Background Art

[0002] The pulp flash evaporator is one of the important equipment required in the alumina production process. It applies the principle that the boiling point of a saturated pulp solution decreases with the reduction of pressure. A multi-stage flash evaporation system composed of multiple pulp flash evaporators is used to recover the waste steam heat from the flash evaporation of the pulp solution, thereby realizing the recovery and utilization of heat energy and facilitating the next process to receive the production materials at low temperature and low pressure.

[0003] Most of the existing primary flash tanks of pulp flash evaporators lack a filtering structure for the pulp during use. Therefore, after long-term use, a large amount of impurities in the pulp will adhere to the inside of the flash tank, reducing the subsequent flash evaporation speed.

[0004] Therefore, it is necessary to provide a new improved digestion pulp flash evaporator to solve the above technical problems. Summary of the Utility Model

[0005] To solve the above technical problems, the utility model provides an improved digestion pulp flash evaporator, which solves the problem that most of the existing primary flash tanks of pulp flash evaporators lack a filtering structure for the pulp during use. Therefore, after long-term use, a large amount of impurities in the pulp will adhere to the inside of the flash tank, affecting the subsequent flash evaporation speed.

[0006] The improved digestion pulp flash evaporator provided by the utility model includes a flash tank. A ventilation pipe is communicatively connected to one side of the flash tank. An air diffuser is communicatively connected to the bottom of the ventilation pipe. The top of the ventilation pipe is communicatively connected to a steam inlet pipe through a flange.

[0007] A filter box is arranged on one side of the flash tank. One side of the filter box is communicatively connected to the flash tank through a first pipeline. The other side of the filter box is communicatively connected to a raw material inlet pipe through a second pipeline. A plurality of filter mesh plates are installed at intervals inside the filter box.

[0008] A mounting seat is arranged at the center inside the flash tank. A stirring shaft is movably arranged on the mounting seat. A plurality of support rings are fixed on the stirring shaft. Two stirring blades are symmetrically fixed on the support rings.

[0009] In a preferred embodiment, the mounting seat is fixed to the inner wall of the flash tank through a plurality of support rod seats.

[0010] In a preferred embodiment, a limit seat is fixed on one of the support rod seats. A rotating shaft penetrates through the limit seat. A first bevel gear is installed at one end of the rotating shaft.

[0011] A second bevel gear is installed on the stirring shaft, and the second bevel gear meshes with the first bevel gear.

[0012] In a preferred embodiment, the first bevel gear and the second bevel gear adopt a closed transmission.

[0013] In a preferred embodiment, a motor is arranged outside the flash tank, the other end of the rotating shaft extends out of the flash tank and is connected with the output end of the motor through a coupling;

[0014] A sealing treatment is performed between the rotating shaft and the flash tank.

[0015] In a preferred embodiment, a steam outlet pipe is connected and arranged at the top of the flash tank, and a residue discharge pipe is connected and arranged at the bottom of the flash tank.

[0016] Advantages of the present utility model:

[0017] 1. When in use, the flash tank is used as the first-stage flash tank in the entire flash system. By arranging multiple layers of filter mesh plates, larger particles in the pulp entering the filter box from the inside of the raw material tank can be filtered to prevent them from entering the flash tank and affecting the flash speed;

[0018] 2. Start the motor to drive the rotating shaft to rotate. Under the transmission of the first bevel gear and the second bevel gear, the stirring shaft drives the stirring blades to rotate to stir the pulp, increasing the contact area and contact speed between the pulp and the steam, thereby greatly improving the flash speed. Description of the drawings

[0019] Figure 1 It is a three-dimensional view of the main structure of the improved digestion pulp flash evaporator provided by the present utility model;

[0020] Figure 2 is Figure 1 an enlarged structural schematic diagram of A shown;

[0021] Figure 3 It is a plan view of the main structure of the improved digestion pulp flash evaporator provided by the present utility model.

[0022] Reference numerals in the drawings: 1, flash tank; 2, ventilation pipe; 3, wind diffuser; 4, flange; 5, steam inlet pipe; 6, filter box; 7, first pipe; 8, second pipe; 9, filter mesh plate; 10, mounting seat; 11, stirring shaft; 12, support ring; 13, stirring blade; 14, support rod seat; 15, limit seat; 16, rotating shaft; 17, first bevel gear; 18, second bevel gear; 19, motor; 20, steam outlet pipe; 21, residue discharge pipe. Detailed implementation manners

[0023] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] Please refer to Figure 1 , Figure 2 and Figure 3 , where Figure 1 is a three-dimensional view of the main structure of the improved flash evaporator for leaching pulp provided by the present utility model; Figure 2 is Figure 1 an enlarged schematic structural view of A shown in; Figure 3 is a plan view of the main structure of the improved flash evaporator for leaching pulp provided by the present utility model.

[0025] In the specific implementation process, as Figures 1 - 3 shown, it includes a flash tank 1. A steam outlet pipe 20 is connected and arranged at the top of the flash tank 1. A residue discharge pipe 21 is connected and arranged at the bottom of the flash tank 1. The expected discharge pipe 21 can enter the next-stage flash equipment. A ventilation pipe 2 is connected and arranged on one side of the flash tank 1. An air diffuser hood 3 is connected and arranged at the bottom of the ventilation pipe 2. The top of the ventilation pipe 2 is connected and communicated with a steam inlet pipe 5 through a flange 4. A filter box 6 is arranged on one side of the flash tank 1. One side of the filter box 6 is connected and communicated with the flash tank 1 through a first pipe 7. The other side of the filter box 6 is connected and communicated with a raw material inlet pipe through a second pipe 8. A plurality of filter mesh plates 9 are installed at intervals inside the filter box 6. When the flash tank 1 is in use, it is used as the first-stage flash tank 1 in the entire flash system. By arranging multiple filter mesh plates 9, larger particles in the pulp entering the filter box 6 from the raw material tank can be filtered to avoid entering the flash tank 1 and affecting the flash speed.

[0026] An installation seat 10 is arranged at the center inside the flash tank 1. The installation seat 10 is fixed on the inner wall of the flash tank 1 through a plurality of support rod seats 14. A stirring shaft 11 is movably arranged on the installation seat 10. A plurality of support rings 12 are fixed on the stirring shaft 11. Two stirring blades 13 are symmetrically fixed on the support rings 12. A limit seat 15 is fixed on one of the support rod seats 14. A rotating shaft 16 penetrates through the limit seat 15. A first bevel gear 17 is installed at one end of the rotating shaft 16. A second bevel gear 18 is installed on the stirring shaft 11. The second bevel gear 18 meshes with the first bevel gear 17. The first bevel gear 17 and the second bevel gear 18 adopt a closed transmission to avoid the mortar affecting their normal transmission. A motor 19 is arranged outside the flash tank 1. The other end of the rotating shaft 16 extends out of the flash tank 1 and is connected with the output end of the motor 19 through a coupling. A sealing treatment is performed between the rotating shaft 16 and the flash tank 1. When the motor 19 is started to drive the rotating shaft 16 to rotate, under the transmission action of the first bevel gear 17 and the second bevel gear 18, the stirring shaft 11 drives the stirring blades 13 to rotate to stir the pulp, increasing the contact area and contact speed between the pulp and the steam, and thus greatly improving the flash speed.

[0027] Working principle of the present utility model: When in use, this flash tank 1 is used as the first-stage flash tank 1 in the entire flash system. By arranging multiple filter screen plates 9, larger particles in the pulp entering the inside of the filter box 6 from the inside of the raw material tank can be filtered to prevent them from entering the inside of the flash tank 1 and affecting the flash speed;

[0028] Start the motor 19 to drive the rotating shaft 16 to rotate. Under the transmission action of the first bevel gear 17 and the second bevel gear 18, the stirring shaft 11 drives the stirring blades 13 to rotate to stir the pulp, increasing the contact area and contact speed between the pulp and the steam, thereby greatly improving the flash speed.

[0029] The circuits and controls involved in the present utility model are all prior arts and will not be elaborated herein.

[0030] The above are only embodiments of the present utility model, and thus do not limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall similarly be included within the patent protection scope of the present utility model.

Claims

1. An improved type of dissolution slurry flash evaporator, comprising a flash tank (1), characterized in that: A vent pipe (2) is provided at one side of the flash tank (1), a diffuser hood (3) is provided at the bottom of the vent pipe (2), and the top of the vent pipe (2) is connected to a steam inlet pipe (5) via a flange (4); A filter box (6) is provided on one side of the flash tank (1); one side of the filter box (6) is connected to the flash tank (1) via a first pipe (7); the other side of the filter box (6) is connected to a raw material inlet pipe via a second pipe (8); a plurality of filter screens (9) are installed at intervals inside the filter box (6); A mounting seat (10) is arranged at the center of the flash tank (1), a stirring shaft (11) is movably arranged on the mounting seat (10), a plurality of support rings (12) are fixed on the stirring shaft (11), and two stirring blades (13) are symmetrically fixed on the support ring (12).

2. The improved dissolution slurry flash evaporator according to claim 1 is characterized in that: The mounting seat (10) is fixed to the inner wall of the flash tank (1) via a plurality of support rod seats (14).

3. The improved dissolution slurry flash evaporator according to claim 2 is characterized in that: A limit seat (15) is fixed on one of the support rod seats (14), a rotating shaft (16) is provided through the limit seat (15), and a first bevel gear (17) is mounted on one end of the rotating shaft (16); A second bevel gear (18) is mounted on the stirring shaft (11), and the second bevel gear (18) is meshed with the first bevel gear (17).

4. The improved dissolution slurry flash evaporator according to claim 3 is characterized in that: The first bevel gear (17) and the second bevel gear (18) adopt a closed transmission.

5. The improved dissolution slurry flash evaporator according to claim 4, characterized in that: A motor (19) is arranged outside the flash tank (1), and the other end of the rotating shaft (16) extends out of the flash tank (1) and is connected to the output end of the motor (19) via a coupling; A sealing process is performed between the rotating shaft (16) and the flash tank (1).

6. The improved dissolution slurry flash evaporator according to claim 5, characterized in that: The top of the flash tank (1) is connected to a steam outlet pipe (20), and the bottom of the flash tank (1) is connected to a residual material discharge pipe (21).

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