Discharging system of seed decomposition final tank

Abstract

The utility model relates to a discharging system of a seed precipitation final tank. The discharging system comprises a last but one seed precipitation tank, a second but one seed precipitation tank, a seed precipitation final tank, a cyclone feeding pump and a cyclone, the discharge port is located at the bottom of the last-but-third seed precipitation tank and the bottom of the last-but-second seed precipitation tank, the last-but-second seed precipitation tank and the seed precipitation tail tank are connected with the cyclone feeding pump, the cyclone feeding pump is connected with the finished product cyclone, and overflow of the finished product cyclone enters the last-but-third seed precipitation tank and the last-but-second seed precipitation tank. According to the seed precipitation tank, coarse particles in the seed precipitation tank can be effectively discharged, the volume of the seed precipitation tank is fully utilized, the seed precipitation decomposition rate is increased, and the seed precipitation tank has a wide application prospect.

Description

Technical Field

[0001] The utility model relates to an aluminum oxide seed decomposition device, in particular to a seed decomposition final tank discharging system. Background Art

[0002] Seed decomposition is the core process of Bayer alumina production. It adopts the continuous operation of multiple seed tanks for production. The discharge method of the final tank is not only related to the main output indicator, the seed decomposition rate, but also has a significant impact on the product quality. At present, the discharge method of the domestic seed tank final tank is divided into two parts. One part is to send the seed tank material into the cyclone through the submerged pump on the second to last and third sub tanks, and the bottom flow of the cyclone is sent to the flat disc filter to discharge the product, and the overflow of the cyclone returns to the tank; the other part is to press the seed tank material into the vertical disc filter through the pressure pipe on the top of the second to last and third sub tanks, and circulate in the seed tank as a seed; at the same time, a circulating pump is set at the bottom of the last seed tank to pump the material of the last seed tank into the third to last seed tank to ensure that the seed tank is at a high material level to meet the liquid level requirements of the submerged pump and self-pressure discharge.

[0003] The main problems are: the coarse particles in the slurry settle after entering the tank, which makes it impossible for the coarse particles to enter the submersible pump, which is not conducive to the discharge of the coarse particles and the improvement of the product particle size; the discharge from the top of the tank causes the effective volume of the tank to be ineffectively utilized, which is not conducive to the improvement of the seed decomposition rate. Utility Model Content

[0004] The utility model aims to provide a decomposition final tank discharging system to improve the decomposition rate of aluminum oxide production and the particle size of the output product.

[0005] To achieve the above purpose, the technical solution of the utility model is as follows:

[0006] A seed separation and decomposition final tank discharging system comprises a third-to-last sub-tank, a second-to-last sub-tank, a seed separation final tank, a cyclone feed pump and a finished product cyclone, wherein the third-to-last sub-tank, the second-to-last sub-tank and the seed separation final tank are connected in sequence, a first discharge port is arranged at the bottom of the third-to-last sub-tank, a second discharge port is arranged at the bottom of the second-to-last sub-tank, the first discharge port and the second discharge port are connected to a seed adding filter, the second-to-last sub-tank and the seed separation final tank are connected to an inlet of a finished product cyclone through a cyclone feed pump, and an outlet of the finished product cyclone is respectively connected to the third-to-last sub-tank, the second-to-last sub-tank and the finished product filter.

[0007] Furthermore, the first discharge port and the second discharge port are self-pressurized discharge ports or pump-containing discharge ports.

[0008] Furthermore, the seed adding filter is a vertical disc seed adding filter.

[0009] The beneficial effects of the utility model are: it can realize the effective discharge of coarse particles in the seed separation tank and improve the product particle size; it can improve the utilization rate of the volume of the seed separation tank, thereby improving the seed separation rate; it can reduce the number of equipment, improve the equipment operation efficiency, and thus reduce the operation energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the system flow of the utility model.

[0011] In the figure: 1. the last sub-trough, 2. the second last sub-trough, 3. the last sub-trough, 4. the first discharge port, 5. the second discharge port, 6. the cyclone feed pump, 7. the finished cyclone.

[0012] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the scope of the utility model.

[0014] like Figure 1 As shown, in the seed decomposition final tank discharging system, the third-to-last seed tank (1), the second-to-last seed tank (2) and the seed final tank (3) are connected in sequence (not shown in the attached figure). The seed tank material that settles to the bottom enters the vertical disc seeding filter from the first self-pressing discharge port (4) at the bottom of the third-to-last seed tank (1); the seed tank material that enters the second-to-last seed tank (2) partially enters the vertical disc seeding filter through the second self-pressing discharge port (5) at the bottom, and partially enters the finished product cyclone (7) through the cyclone feed pump (6). The tank material that enters the vertical disc seeding filter circulates in the seed tank as a crystal seed, and the two paths for the seed tank material to enter the vertical disc seeding filter through the third-to-last seed tank (1) and the second-to-last seed tank (2) are backup paths for each other, so that when one of the paths fails, the entire system can still operate normally. The bottom tank material of the seed tank (3) enters the finished product cyclone (7) via the cyclone feed pump (6), and the two paths for the tank material of the second-to-last tank (2) and the seed tank (3) to enter the finished product cyclone (7) via the cyclone feed pump (6) are also alternate paths for each other. After the tank material enters the finished product cyclone (7) via the cyclone feed pump (6), the overflow in the finished product cyclone (7) enters the third-to-last tank (1) and the second-to-last tank (2) for circulation, and the bottom material in the finished product cyclone pump (7) enters the finished product filter for filtration to produce the product.

[0015] The utility model is suitable for the seed decomposition process of the alumina industry. It can realize the effective discharge of coarse particles in the seed separation tank, more fully utilize the volume of the seed separation tank, and improve the seed decomposition rate. At the same time, it can reduce the number of equipment, improve the equipment operation efficiency, and thus reduce the operation energy consumption. The utility model has broad prospects for promotion and application.

Claims

1. A seed decomposition and final tank discharging system, comprising the third last sub-tank (1), the second last sub-tank (2), the seed final tank (3), a cyclone feed pump and a finished product cyclone, characterized in that: The third-to-last sub-trough (1), the second-to-last sub-trough (2) and the seed and final trough (3) are connected in sequence; a first discharge port (4) is provided at the bottom of the third-to-last sub-trough (1), a second discharge port (5) is provided at the bottom of the second-to-last sub-trough (2); the first discharge port (4) and the second discharge port (5) are connected to a seed adding filter; the second-to-last sub-trough (2) and the seed and final trough (3) are connected to an inlet of a finished product cyclone (7) via a cyclone feed pump (6); and an outlet of the finished product cyclone (7) is respectively connected to the third-to-last sub-trough (1), the second-to-last sub-trough (2) and the finished product filter.

2. The seed decomposition final tank discharging system according to claim 1 is characterized in that: The first discharge port (4) and the second discharge port (5) are self-pressurized discharge ports or pump-containing discharge ports.

3. The seed decomposition final tank discharging system according to claim 1 is characterized in that: The seed adding filter is a vertical disc seed adding filter.

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