Turbine vacuum pump system for preparing aluminum oxide

Abstract

The utility model discloses a turbine vacuum pump system for preparing aluminum oxide, which comprises a turbine vacuum pump, a first gas-liquid separation device and a second gas-liquid separation device, and an impeller and a volute are arranged in the turbine vacuum pump; a gas outlet of the first gas-liquid separation device is connected with a gas inlet of the turbine vacuum pump, and a separation mechanism is arranged in the first gas-liquid separation device; a gas outlet of the second gas-liquid separation device is connected with a gas inlet of the first gas-liquid separation device through a conveying pipe, and the gas inlet of the second gas-liquid separation device is connected with the filtering device. The device is high in separation efficiency, low in energy consumption, low in water consumption rate and high in production efficiency.

Description

Technical Field

[0001] The utility model belongs to the field of aluminum oxide production equipment, in particular to a turbine vacuum pump system used for aluminum oxide preparation. Background Art

[0002] In the process of alumina preparation, both the flat disc filter and the vertical disc filter used in the filtration process need to use a vacuum pump system with high vacuum degree, large suction volume, stable and reliable performance for suction, so as to achieve the process treatment of the filtrate and obtain the required material.

[0003] The vacuum pump systems used in existing flat disc filters and vertical disc filters basically first use a cyclone gas-liquid separator to separate the liquid droplets in the suction medium with a large amount of water vapor and discharge the liquid out of the system, and then use a water ring vacuum pump to suck the separated medium with a small amount of water vapor to form a vacuum; since the water ring vacuum pump needs to form a vacuum through a water seal, the existing vacuum pump system also requires a large amount of circulating water to supply the water ring vacuum pump.

[0004] Due to the use of a water ring vacuum pump system, the existing alumina preparation vacuum system has the following disadvantages:

[0005] (1) Due to the limitations of its structure and separation principle, the traditional cyclone gas-liquid separator has a low separation efficiency, especially for particles and droplets with a diameter of less than 20 μm. Therefore, many droplets still enter the flat water ring vacuum pump along with the air, causing corrosion, scaling and flow blockage of related parts of the vacuum pump. It is necessary to shut down the machine for regular maintenance and clean the water ring vacuum pump.

[0006] (2) Due to the limitation of its structural principle, the water ring vacuum pump requires a large amount of circulating water to form a water seal, which results in its large size, high energy consumption and high noise. The gas-liquid separator used in the water ring vacuum pump system has limited separation effect, causing a large number of liquid droplets to enter the water ring vacuum pump along with the air. Therefore, in addition to working on the air, the vacuum pump rotor also has to work on a large amount of liquid, resulting in high energy consumption of the water ring vacuum pump. Especially when the production process requires a large suction flow and a high vacuum degree, a large part of the work of the water ring vacuum pump will be used to overcome the agitation of the water seal liquid required to form a vacuum, as well as the resistance of the liquid that has not been completely separated and enters the vacuum pump rotor, resulting in a huge waste of energy in the water ring vacuum pump system.

[0007] (3) Due to the water seal and cooling of the water ring vacuum pump, the factory needs to provide a large amount of circulating cooling water, which requires an additional large-capacity water circulation system and water cooling system, increasing the use of clean water and increasing energy consumption.

[0008] (4) The medium discharged from the outlet of the water ring vacuum pump contains a large amount of water vapor, resulting in a waste of water resources. Utility Model Content

[0009] The purpose of the utility model is to provide a turbine vacuum pump system for preparing aluminum oxide, so as to solve the technical problems raised in the above-mentioned background technology.

[0010] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0011] A turbine vacuum pump system for preparing aluminum oxide includes a turbine vacuum pump, a No. 1 gas-liquid separation device, and a No. 2 gas-liquid separation device. The turbine vacuum pump is provided with an impeller and a volute; the gas outlet of the No. 1 gas-liquid separation device is connected to the gas inlet of the turbine vacuum pump, and the No. 1 gas-liquid separation device is provided with a separation mechanism; the gas outlet of the No. 2 gas-liquid separation device is connected to the gas inlet of the No. 1 gas-liquid separation device through a conveying pipe, and the gas inlet is connected to a filtering device.

[0012] Furthermore, there are multiple separation mechanisms, and the multiple separation mechanisms are respectively and spaced apart in the first gas-liquid separation device.

[0013] Furthermore, it also includes a spray mechanism; the spray mechanism is arranged in the first gas-liquid separation device and on both sides of the separation mechanism, and a nozzle is arranged on the spray mechanism.

[0014] Furthermore, it also includes an injection mechanism; the injection mechanism is arranged on the air inlet of the turbine vacuum pump.

[0015] Furthermore, the left end of the delivery pipe is connected to the air inlet of the No. 1 gas-liquid separation device, and the right end is connected to the original vacuum pump system. The No. 2 gas-liquid separation device is connected to the middle part of the delivery pipe and is located between the No. 1 gas-liquid separation device and the original vacuum pump system.

[0016] Furthermore, it also includes an isolation valve, valve No. 1 and valve No. 2; the isolation valve is arranged on the connecting pipeline between the turbine vacuum pump and the gas-liquid separation device No. 1; the valve No. 1 and valve No. 2 are arranged on the conveying pipe, the valve No. 1 is arranged between the gas-liquid separation device No. 1 and the gas-liquid separation device No. 2, and the valve No. 2 is arranged between the gas-liquid separation device No. 2 and the original vacuum pump system; the valve No. 2 is arranged on the No. 2 conveying pipe.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] 1. The utility model provides two gas-liquid separation devices to effectively improve the separation effect, greatly reduce the water vapor content entering the turbine vacuum pump, reduce power consumption, and at the same time can greatly reduce the crystalline scaling substances entering the rotor working parts, effectively slow down the scaling of the rotor working parts, extend the shutdown time of the vacuum pump, and can also greatly reduce the water vapor content in the medium entering and discharging the vacuum pump, effectively reducing water consumption.

[0019] 2. A plurality of separation devices are arranged inside the No. 1 gas-liquid separation device of the utility model, which can fully separate and improve the separation effect. At the same time, a spray device is arranged inside the No. 1 gas-liquid separation device, which can spray high-temperature and high-pressure alkaline solution without stopping the machine, so as to clean the high-performance gas-liquid separation device, reduce the scaling degree of the pre-treatment device, reduce the labor intensity of manual cleaning, extend the production shutdown period for cleaning scaling, and improve production efficiency.

[0020] 3. The utility model is provided with a spray device, which can spray high-temperature and high-pressure alkali liquid spray or alkali liquid when the factory's production system is in normal production or reduced production and the turbine vacuum pump is running at a low speed, so as to clean the scale and impurities of the impeller volute of the turbine vacuum pump, thereby avoiding short-term shutdown for maintenance, slowing down the degree of scaling of the impeller volute of the turbine vacuum pump, and extending the production shutdown period for cleaning scaling.

[0021] 4. The utility model is provided with a turbine vacuum pump, which does not require a water seal to form a vacuum, and effectively reduces the usage of circulating cooling water.

[0022] 5. The utility model can use the turbine vacuum pump and the original vacuum pump system in the production system together to improve the processing efficiency. The turbine vacuum pump and the original vacuum pump system can also be switched for use. When the vacuum pump needs to be overhauled or maintained, the overhaul or maintenance can be achieved without stopping the machine to ensure the normal production. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the utility model;

[0024] In the accompanying drawings, 1-turbine vacuum pump; 11-impeller; 12-volute;

[0025] 2- No. 1 gas-liquid separation device; 21- separation mechanism; 22- spray mechanism;

[0026] 3- Gas-liquid separation unit No. 2;

[0027] 4-delivery pipe; 5-injection mechanism; 6-original vacuum pump system; 7-isolation valve; 8-valve No. 1; 9-valve No. 2. DETAILED DESCRIPTION

[0028] 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.

[0029] A turbine vacuum pump system for preparing aluminum oxide comprises a turbine vacuum pump 1, a first gas-liquid separation device 2, and a second gas-liquid separation device 3. The turbine vacuum pump 1 is provided with an impeller 11 and a volute 12; the impeller 11 is a three-dimensional flow impeller; the gas outlet of the first gas-liquid separation device 2 is connected to the gas inlet of the turbine vacuum pump 1, and the first gas-liquid separation device 2 is provided with a separation mechanism 21; the gas outlet of the second gas-liquid separation device 3 is connected to the gas inlet of the first gas-liquid separation device 2 through a conveying pipe 4, and the gas inlet is connected to the vacuum suction port of a flat disc filter or a vertical disc filter of the aluminum oxide preparation system.

[0030] The second gas-liquid separation device 3 may adopt a cyclone gas-liquid separator in the prior art.

[0031] There are multiple separation mechanisms 21, and the multiple separation mechanisms 21 are respectively arranged in the No. 1 gas-liquid separation device 2 at intervals, and the separation mechanism 21 is detachably connected to the No. 1 gas-liquid separation device 2. Multiple separation mechanisms 21 can ensure the separation effect. Taking into account the separation effect and economy, two separation mechanisms 21 can be provided, among which the separation mechanism 21 close to the air inlet of the No. 1 gas-liquid separation device 2 can select a baffle type separation structure, and the other separation mechanism 21 can select a blue filler type separation structure.

[0032] It also includes a spray mechanism 22; the spray mechanism 22 is arranged in the No. 1 gas-liquid separation device 2 and is arranged on both sides of the separation mechanism 21, and a nozzle is arranged on the spray mechanism 22; the spray mechanism 22 is externally connected to the alkali solution system, and the spray mechanism 22 is used to spray the alkali solution to clean both sides of the separation mechanism 21.

[0033] It also includes an injection mechanism 5; the injection mechanism 5 is arranged on the air inlet of the turbine vacuum pump 1, and the injection mechanism 5 is externally connected to the alkali solution system, which can spray high-temperature and high-pressure alkali solution when the turbine vacuum pump 1 is running at a low speed or shut down, and can also spray high-temperature and high-pressure alkali solution spray when the turbine vacuum pump 1 is running normally, so as to clean the scale and impurities in the flow channels of the parts of the turbine vacuum pump 1 such as the impeller 11 and the volute 12 that are in contact with the suction medium.

[0034] The left end of the conveying pipe 4 is connected to the air inlet of the No. 1 gas-liquid separation device 2, and the right end is connected to the original vacuum pump system 6 of the alumina preparation system. The No. 2 gas-liquid separation device 3 is connected to the middle part of the conveying pipe 4 and is located between the No. 1 gas-liquid separation device 2 and the original vacuum pump system 6. The turbine vacuum pump 1 can be used together with the original vacuum pump system 6, or one of them can be selected for use.

[0035] It also includes an isolation valve 7, a No. 1 valve 8 and a No. 2 valve 9; the isolation valve 7 is arranged on the connecting pipeline between the turbine vacuum pump 1 and the No. 1 gas-liquid separation device 2; the No. 1 valve 8 and the No. 2 valve 9 are arranged on the delivery pipe 4, the No. 1 valve 8 is arranged between the No. 1 gas-liquid separation device 2 and the No. 2 gas-liquid separation device 3, and the No. 2 valve 9 is arranged between the No. 2 gas-liquid separation device 3 and the original vacuum pump system 6; the No. 2 valve 9 is arranged on the No. 2 delivery pipe 4; by controlling the switch of the No. 1 valve 8, the No. 2 valve 9 and the isolation valve 7 , you can choose to use the turbine vacuum pump 1 and the original vacuum pump system 6 at the same time, or only use one of them according to your needs; when you need to use the turbine vacuum pump 1 and the original vacuum pump system 6 at the same time, open the isolation valve 7, valve No. 1 8 and valve No. 2 9; when you need to use the original vacuum pump system and stop using the turbine vacuum pump 1, you can close the isolation valve 7 and valve No. 1 8, and open valve No. 2 9; when you need to use the turbine vacuum pump 1 and stop using the original vacuum pump system, you can open the isolation valve 7 and valve No. 1 8, and close valve No. 2 9.

[0036] The working mode of the utility model is:

[0037] According to the needs, choose to start the original vacuum pump system 6 and the turbine vacuum pump 1 at the same time, or only start one of them; when it is necessary to start the original vacuum pump system 6 and the turbine vacuum pump 1 system at the same time, open the isolation valve 7, valve No. 1 8 and valve No. 2 9, start the original vacuum pump system 6 and the turbine vacuum pump 1 system, and the gas-liquid mixture enters the No. 2 gas-liquid separation device 3 for the first separation, and is divided into two paths, one path enters the original vacuum pump system 6 for treatment, and the other path enters the No. 1 gas-liquid separation device 2, and is separated for the second time through the separation mechanism 21 in the No. 1 gas-liquid separation device 2, and finally enters the turbine vacuum pump 1 system for treatment.

[0038] When only the original vacuum pump system 6 is needed, close the isolation valve 7 and valve No. 1 8, open valve No. 2 9, start the original vacuum pump system 6, and the gas-liquid mixture enters the gas-liquid separation device No. 2 3 for separation, and then enters the original vacuum pump system 6 for treatment.

[0039] When only the turbine vacuum pump 1 is needed, the isolation valve 7 and valve No. 1 8 are opened, and valve No. 2 9 is closed. The gas-liquid mixture enters the gas-liquid separation device No. 2 3 for the first separation, then enters the gas-liquid separation device No. 1 2, and is separated twice by the separation mechanism 21 in the gas-liquid separation device No. 1 2, and finally enters the turbine vacuum pump 1 system for processing.

[0040] When the turbine vacuum pump 1 is in use, the injection mechanism 5 can spray high-temperature and high-pressure alkali solution when the turbine vacuum pump 1 is running at a low speed or shut down, and can also spray high-temperature and high-pressure alkali solution spray when the turbine vacuum pump 1 is running normally, so as to clean the flow channels of the impeller 11, volute 12 and other parts of the turbine vacuum pump 1 that are in contact with the suction medium to remove scale and impurities.

[0041] After the filtrate is treated, alkaline solution is sprayed through the spray mechanism 22 to clean both sides of the separation mechanism 21.

[0042] 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 turbine vacuum pump system for preparing alumina, comprising a turbine vacuum pump, a first gas-liquid separation device, and a second gas-liquid separation device, characterized in that: The turbine vacuum pump is provided with an impeller and a volute; the gas outlet of the No. 1 gas-liquid separation device is connected to the air inlet of the turbine vacuum pump, and a separation mechanism is provided in the No. 1 gas-liquid separation device; the gas outlet of the No. 2 gas-liquid separation device is connected to the air inlet of the No. 1 gas-liquid separation device through a conveying pipe, and the air inlet is connected to the filtering equipment.

2. A turbine vacuum pump system for aluminum oxide production according to claim 1, characterized in that: There are multiple separation mechanisms, and the multiple separation mechanisms are respectively and spaced apart in the first gas-liquid separation device.

3. A turbine vacuum pump system for aluminum oxide production according to claim 1, characterized in that: It also includes a spray mechanism; the spray mechanism is arranged in the No. 1 gas-liquid separation device and on both sides of the separation mechanism, and a nozzle is arranged on the spray mechanism.

4. A turbine vacuum pump system for aluminum oxide production according to claim 1, characterized in that: It also includes an injection mechanism; the injection mechanism is arranged on the air inlet of the turbine vacuum pump.

5. A turbine vacuum pump system for aluminum oxide production according to claim 1, characterized in that: The left end of the delivery pipe is connected to the air inlet of the No. 1 gas-liquid separation device, and the right end is connected to the original vacuum pump system. The No. 2 gas-liquid separation device is connected to the middle part of the delivery pipe and is located between the No. 1 gas-liquid separation device and the original vacuum pump system.

6. A turbine vacuum pump system for aluminum oxide production according to claim 5, characterized in that: It also includes an isolation valve, valve No. 1 and valve No. 2; the isolation valve is arranged on the connecting pipeline between the turbine vacuum pump and the gas-liquid separation device No. 1; the valve No. 1 and valve No. 2 are arranged on the conveying pipe, the valve No. 1 is arranged between the gas-liquid separation device No. 1 and the gas-liquid separation device No. 2, the valve No. 2 is arranged between the gas-liquid separation device No. 2 and the original vacuum pump system; the valve No. 2 is arranged on the No. 2 conveying pipe.

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