Alumina settling tank isolation device and mounting structure thereof

Abstract

The utility model relates to an aluminum oxide settling tank isolating device and a mounting structure thereof, which belong to the field of aluminum oxide processing, and the mounting structure of the aluminum oxide settling tank isolating device comprises an aluminum oxide settling tank and the aluminum oxide settling tank isolating device mounted at a feed port of an aluminum oxide settling tank body, the aluminum oxide settling tank isolation device comprises an isolation pipe and an exhaust valve, one end of the isolation pipe is communicated with front-end equipment through a feeding pipe, the other end of the isolation pipe is communicated with the aluminum oxide settling tank through a discharging pipe, the highest point of the isolation pipe is higher than the tank top of the aluminum oxide settling tank, an opening communicated with the atmosphere is formed in the isolation pipe, and a valve is arranged at the opening. When front-end equipment is shut down and overhauled, the liquid level of the settling tank does not need to be reduced, only the valve needs to be opened, the opening of the isolation pipe is communicated with the atmosphere, the opening is higher than the tank top of the aluminum oxide settling tank, materials in the aluminum oxide settling tank cannot flow back, and therefore good conditions are provided for overhauling and continuous production.

Description

Technical Field

[0001] The utility model relates to the field of aluminum oxide processing, in particular to an aluminum oxide sedimentation tank isolation device and a mounting structure thereof. Background Art

[0002] In the sedimentation process of alumina production, sedimentation tanks are used for sedimentation. The sedimentation tank mainly uses the principle of gravity sedimentation to separate the impurity particles in the slurry from the available sodium aluminate solution. The material of the sedimentation tank comes from the front-end process. Due to the nature of the material itself, the front-end equipment and pipelines are prone to failure, so regular maintenance is required.

[0003] The sedimentation tank is a large-scale equipment. In order to reduce construction costs, most of the sedimentation tank is installed above the ground, so that the liquid level in the sedimentation tank is higher than the feed height. When the front-end equipment is shut down for maintenance, the material in the sedimentation tank is prone to backflow.

[0004] When the front-end equipment is being overhauled, in order to prevent the backflow of materials, a part of the materials in the sedimentation tank will be discharged in actual production to reduce the liquid level of the sedimentation tank, and then the equipment will be shut down for maintenance. However, this method will cause the materials at the tank wall, center tube, feed pipe and other locations where the liquid level changes to solidify and form scars. When production is resumed, the scars will fall off due to temperature reasons, affecting the stable operation of the sedimentation tank, affecting the continuity of production, and reducing production efficiency.

[0005] Therefore, when performing maintenance on front-end equipment, preventing the backflow of materials in the alumina settling tank while ensuring the continuous settling of alumina has become an urgent problem to be solved by technical personnel in the relevant field. Utility Model Content

[0006] In order to solve the problem of material backflow in the alumina sedimentation tank during maintenance, the utility model provides an alumina sedimentation tank isolation device and its installation structure to reduce the impact of front-end equipment maintenance on production continuity. The specific technical solution is as follows:

[0007] An alumina sedimentation tank isolation device includes an isolation pipe and an exhaust valve, one end of the isolation pipe is connected to a front-end device through a feed pipe, and the other end is connected to the alumina sedimentation tank through a discharge pipe. The highest point of the isolation pipe is higher than the tank top height of the alumina sedimentation tank. An opening connected to the atmosphere is provided on the isolation pipe, and a valve is provided at the opening.

[0008] Preferably, the valve at the opening is an exhaust valve.

[0009] Preferably, a drain pipe is provided at one end of the feed pipe away from the isolation pipe, the outlet height of the drain pipe is lower than the height of the isolation pipe, and a drain valve is provided on the drain pipe.

[0010] Preferably, the isolation tube is in an inverted "U" shape.

[0011] Preferably, one end of the isolation tube is detachably connected to the feed pipe via a flange, and the other end of the isolation tube is detachably connected to the discharge pipe via a flange.

[0012] Preferably, an operating platform is provided below the isolation tube.

[0013] Preferably, the surface of the isolation tube is covered with thermal insulation cotton.

[0014] The utility model also provides an installation structure of an alumina sedimentation tank isolation device, comprising an alumina sedimentation tank and an alumina sedimentation tank isolation device installed at a feed port of the alumina sedimentation tank body.

[0015] Beneficial effects:

[0016] The beneficial effects of the technical solution of the utility model are as follows:

[0017] 1. An opening connected to the atmosphere is provided on the isolation pipe, and a valve is provided at the opening. When the front-end equipment is shut down for maintenance, there is no need to lower the liquid level of the sedimentation tank. It is only necessary to open the valve to connect the opening of the isolation pipe to the atmosphere. The opening height is higher than the tank top height of the alumina sedimentation tank, and the material in the alumina sedimentation tank cannot flow back, thereby providing good conditions for maintenance and continuous production;

[0018] 2. A drain pipe is provided at one end of the feed pipe away from the isolation pipe. The outlet height of the drain pipe is lower than the highest point height of the isolation pipe. A drain valve is provided on the drain pipe. When performing maintenance, open the drain pipe to empty the material in the feed pipe to prevent pipe blockage and increase the service life of the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the installation structure of the isolation pipe of the utility model;

[0021] Figure 2 It is a schematic diagram of the isolation tube of the utility model;

[0022] Figure 3 It is a cross-sectional view of the isolation pipe of the utility model.

[0023] In the figure, 11, feed pipe; 12, isolation pipe; 121, opening; 123, exhaust valve; 13, discharge pipe; 14, flange; 15, operating platform; 16, drain pipe; 161, drain valve; 18, insulation layer; 20, alumina sedimentation tank; 30, front-end equipment. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0025] In actual production, a portion of the material in the alumina sedimentation tank 20 will be discharged to lower the liquid level of the alumina sedimentation tank 20, and then the tank will be shut down for maintenance. However, this method will cause the material at the tank wall, center tube, feed pipe and other positions where the liquid level changes to solidify and produce scars. When production is resumed, the scars will fall off due to temperature reasons, affecting the stable operation of the sedimentation tank.

[0026] The utility model designs a "U-shaped tube" to isolate the alumina sedimentation tank from the front-end equipment by using air pressure.

[0027] like Figure 1 As shown, the installation structure of the alumina sedimentation tank isolation device includes an alumina sedimentation tank 20 and an alumina sedimentation tank isolation device installed at the feed port of the alumina sedimentation tank 20 body.

[0028] After adopting this technology, during maintenance, it is only necessary to isolate the sedimentation tank 20 through the isolation device without lowering the liquid level of the sedimentation tank. Specifically, the valve of the isolation device is opened to exhaust gas, and the material can be separated before and after the isolation device by using the effect of atmospheric pressure, which provides favorable conditions for the stability of the sedimentation tank 20 and the continuity of production.

[0029] like Figure 1 and Figure 2As shown, the alumina sedimentation tank isolation device includes an isolation pipe 12 and an exhaust valve 123. One end of the isolation pipe 12 is connected to the front-end equipment 30 through the feed pipe 11, and the other end is connected to the alumina sedimentation tank 20 through the discharge pipe 13. The highest point of the isolation pipe 12 is higher than the tank top height of the alumina sedimentation tank 20. The isolation pipe 12 is provided with an opening 121 connected to the atmosphere, and a valve is provided at the opening 121. When performing maintenance, the pump group of the front-end equipment 30 is turned off and the valve is opened. At this time, the opening 121 is connected to the atmosphere, and the potential energy of the highest point of the isolation pipe 12 is greater than the potential energy of the tank top of the sedimentation tank 20. The material in the sedimentation tank 20 cannot flow back to the front-end equipment 30, and there is no need to lower the liquid level of the sedimentation tank 20, which improves the convenience and continuity of production.

[0030] The valve of the opening 121 is set as an exhaust valve 123. When maintenance is required, the front-end equipment 30 pump group is closed and the exhaust valve 123 is opened to prevent the material from flowing back. The exhaust valve 123 is used to control whether the pipeline opening 121 is connected to the atmosphere, which is simple to operate.

[0031] When the front-end equipment 30 is closed, due to the high height of the isolation pipe 12, the material at one end of the feed pipe 11 cannot flow to the discharge pipe 13. The material stays in the feed pipe 11 for too long, which may cause the pipe to be blocked. To prevent the feed pipe 11 from being blocked, a drain pipe 16 is provided at the end of the feed pipe 11 away from the isolation pipe 12. The outlet height of the drain pipe 16 is lower than the height of the isolation pipe 12. A drain valve 161 is provided on the drain pipe 16 to drain the material in the feed pipe 11 to prevent the material in the feed pipe 11 from scarring and blocking the pipe when the machine is shut down, thereby increasing the service life of the pipe.

[0032] The highest point height of the isolation tube 12 is higher than the top height of the alumina settling tank 20. The isolation tube 12 can slowly rise from the feed pipe 11 to the discharge pipe 13, and then slowly descend after reaching the highest point to reduce the number of bends, thereby reducing scarring in the pipeline.

[0033] However, this structure does not meet the actual needs in terms of existing pipeline modification and operational portability. In order to increase the modification speed, the utility model sets the isolation pipe 12 to an inverted "U" shape. During installation and pipeline modification, it only needs to be installed in a part of the overall pipeline to reduce the overall installation length and span of the isolation pipe 12, and it is more convenient to install or repair the isolation pipe 12.

[0034] However, the inverted "U" shape has a large curvature. When the machine is shut down for maintenance, the material stays still at the end of the inverted "U" shape for a period of time, which is prone to scarring. Especially after multiple maintenance, it is easy to cause blockage inside the pipeline. On the one hand, the utility model arranges the isolation tube 12 into a detachable connection structure. On the other hand, the utility model arranges an insulation layer 18 on the surface of the isolation tube to reduce the scarring and pipeline blockage in the pipeline.

[0035] One end of the isolation tube 12 is detachably connected to the feed tube 11 through a flange 14, and the other end of the isolation tube 12 is detachably connected to the discharge tube 13 through a flange 14. The isolation tube 12 is set to a detachable structure using the flange 14, which is convenient for cleaning the scabs and blockages in the isolation tube 12. At the same time, the disassembled isolation tube 12 can be used as an inspection port to observe the scabs of the feed tube 11 and the discharge tube 13, thereby improving the inspection efficiency and reducing the overall installation and maintenance costs of the pipeline.

[0036] At the same time, a maintenance space is provided for the installation and maintenance of the isolation pipe 12 , and an operating platform 15 and a fence are arranged below the isolation pipe 12 .

[0037] like Figure 3 As shown, in order to prevent scarring at the isolation pipe 12, especially at the connection bend of the isolation pipe 12, a heat-insulating layer 18 is provided on the surface of the isolation pipe 12, and heat-insulating cotton can be used to wrap the outer wall of the isolation pipe to form the heat-insulating layer 18. The heat-insulating layer 18 provided on the surface can reduce the cooling speed of the material in the pipe, reduce scarring at the bend, reduce the maintenance frequency, and reduce the workload.

[0038] The steps of using this utility model are as follows:

[0039] (1) The operator shuts down the front-end device 30, opens the exhaust valve 123 and the drain valve 161 to inspect the front-end device 30;

[0040] (2) After the inspection is completed, the operator closes the exhaust valve 123 and the drain valve 161 and opens the front-end device 30.

[0041] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An alumina settling tank isolation device, characterized in that: Including isolation pipe and exhaust valve, One end of the isolation tube is connected to the front-end equipment through a feed pipe, and the other end is connected to the alumina sedimentation tank through a discharge pipe. The isolation tube is provided with an opening connected to the atmosphere. The height of the opening is higher than the top height of the alumina sedimentation tank, and a valve is provided at the opening.

2. The alumina settling tank isolation device according to claim 1, characterized in that: The valve at the opening is an exhaust valve.

3. The alumina settling tank isolation device according to claim 1, characterized in that: A drain pipe is arranged at one end of the feed pipe away from the isolation pipe, the outlet height of the drain pipe is lower than the height of the isolation pipe, and a drain valve is arranged on the drain pipe.

4. The alumina settling tank isolation device according to claim 1, characterized in that: The isolation tube is in an inverted "U" shape.

5. The alumina settling tank isolation device according to claim 4, characterized in that: One end of the isolation tube is detachably connected to the feed tube via a flange, and the other end of the isolation tube is detachably connected to the discharge tube via a flange.

6. The alumina settling tank isolation device according to claim 5, characterized in that: An operating platform is arranged below the isolation tube.

7. The alumina settling tank isolation device according to claim 4, characterized in that: The surface of the isolation tube is sheathed with heat-insulating cotton.

8. An installation structure for an alumina settling tank isolation device, characterized in that: It comprises an alumina sedimentation tank and an alumina sedimentation tank isolation device as described in any one of claims 1 to 7 installed at the feed inlet of the alumina sedimentation tank body.

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