Pretreatment device for preparing turbine vacuum pump from aluminum oxide

Abstract

The pretreatment device comprises a body, a separating device and a flushing device, an air inlet is formed in the top of the left side of the body, and an air outlet is formed in the right side of the body; the separation device is arranged in the body and comprises a primary separation mechanism and a secondary separation mechanism; the primary separation mechanism and the secondary separation mechanism are arranged on the left side and the right side in the body in a spaced mode respectively. The flushing device is arranged in the body and comprises a front flushing mechanism, a middle flushing mechanism and a rear flushing mechanism; the front flushing mechanism is arranged on the left side of the primary separation mechanism, and a nozzle is arranged on the right side; the middle washing mechanism is arranged between the primary separation mechanism and the secondary separation mechanism, and nozzles are arranged on the two sides of the middle washing mechanism; the rear washing mechanism is arranged on the right side of the secondary separation mechanism, and a nozzle is arranged on the left side. According to the utility model, the separation effect can be improved, the maintenance frequency is prolonged, the production cost is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the field of aluminum oxide production equipment, in particular to a pre-processing device for preparing a turbine vacuum pump from aluminum oxide. Background Art

[0002] The turbine vacuum pump achieves vacuum suction by performing work on the medium through the high-speed rotating impeller. Before the medium enters the turbine vacuum pump, it must be treated by particle removal and liquid separation to avoid damaging the high-speed rotating impeller, and to prevent the impurities in the medium from adhering to the impeller volute and other parts for a long time, which may destroy the dynamic balance of the rotating parts, cause corrosion to the parts, and block the flow channel. In order to avoid the above situation, the turbine vacuum pump will be equipped with a pre-treatment device at the front end of the air intake. The pre-treatment devices commonly used in the alumina preparation industry are traditional single-function gas-liquid separators, such as cyclone separation, baffle separation, wire mesh separation and other devices, which can only separate and remove larger particles and droplets in the medium.

[0003] Due to the limitations of the structure and separation principle of the existing traditional gas-liquid separator, the separation efficiency is not high, and generally only particles and droplets larger than 20μm can be separated. Particles and droplets with a diameter of less than 20μm can still enter the turbine vacuum pump because they are not separated and removed, causing corrosion and flow channel blockage, etc., especially in the preparation process of alumina, because the flat plate and vertical plate vacuum air flow medium sucked by the vacuum pump contains aluminum hydroxide that is easy to precipitate and crystallize and scale, the air flow will cause aluminum hydroxide to precipitate and form insoluble, difficult to clean and corrosive scale on it when it passes through the baffle, wire mesh or cyclone blade of the pre-treatment device. As time goes by, the separation effect will be further reduced, resulting in a reduction in the flow area or even blockage of the flow channel; in addition, the droplets that are not completely separated will inevitably enter the impeller, causing aluminum hydroxide scale to form on the surface of the impeller. Long-term operation will cause the high-speed rotating impeller to lose balance, causing large vibration of the equipment and damage to the machine. In order to ensure the normal operation of the equipment, the conventional pre-treatment device currently used needs to clean and remove the insoluble scale on the impeller volute every 15 to 20 days. Due to the poor solubility of aluminum hydroxide, in addition to soaking in a strong alkaline solution, it also needs to be manually cleaned and removed, so it takes a long time to clean the scale. Therefore, the pre-treatment technology currently used for alumina preparation has poor separation effect, which not only leads to a short shutdown cycle for cleaning scale and consumes a lot of manual labor, but also a long downtime, which seriously affects production efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a pre-treatment device for preparing a turbine vacuum pump from aluminum oxide, so as to solve the technical problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A pre-treatment device for a turbine vacuum pump for preparing aluminum oxide comprises a main body, a separation device and a flushing device, wherein an air inlet is provided at the top of the left side of the main body, and an air outlet is provided at the right side; the separation mechanism is arranged inside the main body, and comprises a primary separation mechanism and a secondary separation mechanism; the primary separation mechanism and the secondary separation mechanism are arranged at intervals on the left and right sides of the main body respectively; the flushing device is arranged inside the main body, and comprises a front flushing mechanism, a middle flushing mechanism and a rear flushing mechanism; the front flushing mechanism is arranged on the left side of the primary separation mechanism, and a nozzle is provided on the right side thereof; the middle flushing mechanism is arranged between the primary separation mechanism and the secondary separation mechanism, and nozzles are provided on both sides thereof; the rear flushing mechanism is arranged on the right side of the secondary separation mechanism, and a nozzle is provided on the left side thereof.

[0007] Furthermore, the primary separation mechanism is a baffle separation structure; and the secondary separation mechanism is a blue filler separation structure.

[0008] Furthermore, the primary separation mechanism and the secondary separation mechanism are detachably connected to the main body using a drawer-type installation structure.

[0009] Furthermore, there are multiple nozzles on the front flushing mechanism, the middle flushing mechanism, and the rear flushing mechanism.

[0010] Furthermore, it also includes a liquid level gauge and a negative pressure pump; the liquid level gauge is arranged in the body; the water inlet of the negative pressure pump is connected to the bottom of the body.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. The utility model is capable of removing particles and liquid droplets with a diameter greater than 3 μm in a gas-liquid mixture by arranging a baffle-type primary separation mechanism and a blue filler-type secondary separation mechanism, thereby improving the separation effect, reducing the particles and liquid droplets entering the impeller volute of the turbine vacuum pump, slowing down the degree of scaling of the impeller volute, extending the frequency of shutting down the turbine vacuum pump for scaling cleaning, reducing maintenance costs, and improving production efficiency.

[0013] 2. The utility model is provided with a flushing device, which can flush the separation mechanism without stopping the machine, reduce the degree of scaling of the separation device, reduce the labor intensity of the manual cleaning structure, and at the same time reduce the frequency of shutdown for cleaning, thereby further improving production efficiency.

[0014] 3. The utility model is provided with a liquid level meter and a negative pressure pump, so that the separated particles and liquid droplets, as well as the alkali solution after flushing, can be discharged in time, thereby reducing the degree of scaling inside the body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] In the accompanying drawings, 1-main body; 11-air inlet; 12-air outlet;

[0017] 2-separation device; 21-primary separation mechanism; 22-secondary separation mechanism;

[0018] 3-flushing device; 31-front flushing mechanism; 32-middle flushing mechanism; 33-rear flushing mechanism; 34-nozzle; 4-liquid level gauge; 5-negative pressure pump. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail with reference to the accompanying drawings and preferred embodiments. However, it should be noted that many details listed in the specification are only for the purpose of enabling readers to have a thorough understanding of one or more aspects of the utility model, and these aspects of the utility model can be realized even without these specific details.

[0020] A pre-treatment device for a turbine vacuum pump for preparing aluminum oxide, comprising a body 1, a separation device 2, and a flushing device 3, wherein the body 1 is provided with an air inlet 11 at the top on the left side, and an air outlet 12 on the right side; the separation device 2 is arranged inside the body 1, and comprises a primary separation mechanism 21 and a secondary separation mechanism 22; the primary separation mechanism 21 and the secondary separation mechanism 22 are arranged at intervals on the left and right sides of the body 1 respectively; after the gas-liquid mixture enters from the air inlet 11 of the body 1, it first passes through the primary separation mechanism 21 for primary separation, and then passes through the secondary separation mechanism 22 for secondary separation, thereby achieving efficient separation; the flushing device 3 is arranged inside the body 1, and comprises a pre-flushing mechanism 21 and a secondary separation mechanism 22; Mechanism 31, middle flushing mechanism 32, and rear flushing mechanism 33; the front flushing mechanism 31 is arranged on the left side of the primary separation mechanism 21, and a nozzle 34 is provided on the right side thereof for flushing the left side surface of the primary separation mechanism 21; the middle flushing mechanism 32 is arranged between the primary separation mechanism 21 and the secondary separation mechanism 22, and nozzles 34 are provided on both sides thereof for flushing the right side surface of the primary separation mechanism 21 and the left side surface of the secondary separation mechanism 22; the rear flushing mechanism 33 is arranged on the right side of the secondary separation mechanism 22, and a nozzle 34 is provided on the left side thereof for flushing the right side surface of the secondary separation mechanism 22. Multiple flushing mechanisms can comprehensively flush the two separation mechanisms.

[0021] The primary separation mechanism 21 is a baffle-type separation structure; the secondary separation mechanism 22 is a blue filler-type separation structure. The gas-liquid mixture is firstly separated by the baffle-type primary separation mechanism 21, which can separate and remove particles and droplets with larger diameters, and then is separated by the blue filler-type secondary separation mechanism 22, which can separate and remove particles and droplets with smaller diameters, thereby improving the separation effect.

[0022] The primary separation mechanism 21 and the secondary separation mechanism 22 are detachably connected to the body 1 using a drawer-type installation structure, which is convenient for assembly and disassembly.

[0023] There are multiple nozzles 34 on the front flushing mechanism 31, the middle flushing mechanism 32, and the rear flushing mechanism 33, and the front flushing mechanism 31, the middle flushing mechanism 32, and the rear flushing mechanism 33 are externally connected to the alkali solution system; multiple nozzles 34 can ensure that the spraying area can fully cover the primary separation mechanism 21 and the secondary separation mechanism 22, thereby ensuring the flushing effect.

[0024] It also includes a liquid level meter 4 and a negative pressure pump 5; the liquid level meter 4 is arranged in the main body 1; the water inlet of the negative pressure pump 5 is connected to the bottom of the main body 1; the liquid level meter 4 is used to detect the liquid level height in the main body 1. When the liquid level height exceeds a certain value, the negative pressure pump 5 can be started to pump out the liquid in the main body 1.

[0025] The working mode of the utility model is:

[0026] The gas-liquid mixture enters the main body 1 from the air inlet 11, and first passes through the primary separation mechanism 21 for primary separation. The primary separation mechanism 21 separates and removes particles and droplets with larger diameters in the gas-liquid mixture; after separation by the primary separation mechanism 21, the gas-liquid mixture enters the secondary separation mechanism 22 for secondary separation. The secondary separation mechanism 22 separates and removes particles and droplets with larger diameters. The gas-liquid mixture that has undergone secondary separation is discharged through the air outlet 12.

[0027] During the separation process of the gas-liquid mixture, the alkali solution system delivers alkali solution to the flushing device 3 , the nozzle 34 sprays the alkali solution, and the front flushing mechanism 31 , the middle flushing mechanism 32 , and the rear flushing mechanism 33 fully flush the separation device 2 .

[0028] The liquid level meter 4 monitors the liquid level in the body 1 . When the liquid level of the separated particles and liquid droplets, and the lye after flushing in the body 1 exceeds a certain value, the negative pressure pump 5 is started to pump out the liquid in the body 1 .

[0029] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A pre-treatment device for preparing a turbine vacuum pump from aluminum oxide, comprising a body, a separation device, and a flushing device, characterized in that: An air inlet is provided at the top of the left side of the main body, and an air outlet is provided at the right side; the separation device is arranged inside the main body, including a primary separation mechanism and a secondary separation mechanism; the primary separation mechanism and the secondary separation mechanism are respectively arranged at intervals on the left and right sides of the main body; the flushing device is arranged inside the main body, including a front flushing mechanism, a middle flushing mechanism, and a rear flushing mechanism; the front flushing mechanism is arranged on the left side of the primary separation mechanism, and a nozzle is provided on the right side thereof; the middle flushing mechanism is arranged between the primary separation mechanism and the secondary separation mechanism, and nozzles are provided on both sides thereof; the rear flushing mechanism is arranged on the right side of the secondary separation mechanism, and a nozzle is provided on the left side thereof.

2. The pre-treatment device for preparing a turbine vacuum pump from aluminum oxide according to claim 1, characterized in that: The primary separation mechanism is a baffle separation structure; the secondary separation mechanism is a blue filler separation structure.

3. The pre-treatment device for preparing a turbine vacuum pump from aluminum oxide according to claim 1, characterized in that: The primary separation mechanism and the secondary separation mechanism are detachably connected to the main body using a drawer-type installation structure.

4. The pre-treatment device for preparing a turbine vacuum pump from aluminum oxide according to claim 1, characterized in that: There are multiple nozzles on the front flushing mechanism, the middle flushing mechanism and the rear flushing mechanism.

5. The pre-treatment device for preparing a turbine vacuum pump from aluminum oxide according to claim 1, characterized in that: It also includes a liquid level meter and a negative pressure pump; the liquid level meter is arranged in the body; the water inlet of the negative pressure pump is connected to the bottom of the body.

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