Vacuum apparatus for the preparation of a polycrystalline alumina fibre gel

Abstract

The application relates to the technical field of chemical production, in particular to a kind of vacuum equipment for preparing polycrystalline alumina fiber glue, comprising main vacuum pump, standby pump group and control module, wherein the main vacuum pump is communicated with reaction kettle, and is used for initial vacuumizing of reaction kettle, standby pump group is communicated with reaction kettle, standby pump group includes standby water pump and jet pump, control module is communicated between main vacuum pump and standby pump group, for monitoring vacuum degree and temperature in reaction kettle. Through the cooperative control of the control module and the standby pump group, when the temperature or vacuum degree in the reaction kettle reaches the set threshold value, the standby pump group is used to accurately adjust the reaction environment at low power, so that the temperature and vacuum degree fluctuation is controlled within ±0.1%, thereby ensuring the reaction stability of polycrystalline alumina fiber sol and the product quality.

Description

Technical Field

[0001] This application relates to the field of chemical production technology, and in particular to a standby vacuum device for polycrystalline alumina fiber adhesive. Background Technology

[0002] In the preparation of polycrystalline alumina fibers, sol concentration is one of the key steps. Its purpose is to remove the solvent and adjust the sol viscosity to achieve a suitable concentration for spinning.

[0003] Concentration temperature and vacuum level are key control factors in the vacuum concentration stage of polycrystalline alumina fiber sol. Currently, there are no dedicated vacuum systems for polycrystalline alumina fiber sol concentration on the market. Industrial systems serving stable working environments or with low tolerance for deviations are typically used, lacking specialized vacuum systems that monitor changes in internal temperature and vacuum and make precise adjustments based on these changes.

[0004] The internal molecular structure and concentration state of polycrystalline alumina fiber sol are key factors affecting the stability of subsequent spinning. The matching degree of temperature and vacuum during the concentration of polycrystalline alumina fiber sol directly affects the sol quality, resulting in a series of problems such as low alumina fiber strength, uneven fiber diameter, and increased slag balls.

[0005] To further improve the stability of the sol and the quality of alumina fibers, a high-precision automatic control vacuum concentration system was designed to enhance both the stability of the sol and the quality of the alumina fibers. Utility Model Content

[0006] The purpose of this application is to improve the stability of the sol, thereby avoiding low strength and uneven fiber diameter of alumina fibers, and thus ensuring the stability of the sol and the quality of the alumina fibers.

[0007] To achieve the above objectives, this application provides a standby vacuum apparatus for the synthesis of polycrystalline alumina fiber sol, used to synthesize polycrystalline alumina fiber sol by controlling the vacuum level and temperature within the reactor, comprising:

[0008] The main vacuum pump is connected to the reactor and is used for the initial evacuation of the reactor;

[0009] A backup pump set is connected to the reactor. The backup pump set includes a backup water pump and a jet pump.

[0010] The control module communicates with the main vacuum pump and the standby pump group to monitor the vacuum level and temperature inside the reactor. It also controls the standby water pump and jet pump to operate at the current power when the temperature and vacuum level inside the reactor reach the set values, thereby maintaining the current vacuum level and temperature inside the reactor.

[0011] Preferably, the control module is connected to a temperature sensor and a vacuum sensor located inside the reactor. The temperature sensor and vacuum sensor are used to reflect the temperature and vacuum data inside the reactor in real time.

[0012] Preferably, the standby pump set includes multiple sets of standby water pumps and jet pumps connected in parallel, used to switch to the standby pump set when the main vacuum pump fails.

[0013] Preferably, a check valve is provided on the connecting pipeline between the water pump and the jet pump. The check valve is used to prevent the working medium in the jet pump from flowing back to the main vacuum pump.

[0014] Preferably, it also includes a buffer tank, which is located between the reactor and the main vacuum pump and the standby pump set to reduce pressure fluctuations.

[0015] Preferably, there are multiple reactors, and the reactors are installed on the same steel platform via flanges. The steel platform is equipped with transverse reinforcing ribs and vertical anti-vibration supports to suppress the combined vibration when multiple reactors are working simultaneously.

[0016] Preferably, the vacuum equipment supports the parallel operation of multiple reactors, and the control module can adaptively adjust the power of the main vacuum pump and jet pump according to the number of reactors in operation.

[0017] Preferably, the standby water pump controls the pumping speed of the jet pump by adjusting the output water flow pressure, thereby adjusting the vacuum level inside the reactor.

[0018] Preferably, it also includes a pressure relief valve installed on the buffer tank, which is connected to the control module and is used to balance the pressure inside and outside the buffer tank.

[0019] Preferably, it also includes a water tank, which is connected to the jet pump and circulated for cooling via an external cooling tower.

[0020] Compared to the aforementioned background technology, through the coordinated control of the control module and the backup pump group, when the temperature or vacuum level inside the reactor reaches the set threshold, the backup pump group precisely adjusts the reaction environment at low power, so that the temperature and vacuum level fluctuations are controlled within ±0.1%, thereby ensuring the reaction stability and product quality of polycrystalline alumina fiber sol. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1This is a schematic diagram of the vacuum concentration system equipment in the embodiments of this application.

[0023] The components include: 1. Control module; 2. Reactor; 3. Steel platform; 4. Water tank; 5. Check valve; 6. Buffer tank; 7. Pressure relief valve; 8. Main vacuum pump; 9. Backup water pump; 10. Jet pump. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] It should be noted that the directional terms such as "upper end," "lower end," "left side," and "right side" mentioned below are defined based on the accompanying drawings in the instruction manual.

[0027] Please see Figure 1 A standby vacuum device for polycrystalline alumina fiber sol synthesis is used to synthesize polycrystalline alumina fiber sol by regulating the vacuum level and temperature in the reactor 2. The device includes a main vacuum pump 8, a standby pump group, and a control module 1.

[0028] The main vacuum pump 8 precisely evacuates the reactor 2, and the control module 1 monitors and regulates the vacuum level and temperature in real time. When the vacuum level and temperature parameters fluctuate, the backup pump group is automatically activated to compensate, ensuring that the reaction conditions are stable within ±0.1%, thereby significantly improving the synthesis quality and reaction stability of polycrystalline alumina fiber sol.

[0029] The main vacuum pump 8 is connected to the reactor 2 and is used for the initial evacuation of the reactor 2. The standby pump set is connected to the reactor 2 and includes a standby water pump 9 and a jet pump 10.

[0030] In the preparation of polycrystalline alumina fiber colloids, the main vacuum pump 8 is directly connected to the reactor 2, responsible for rapidly establishing a vacuum environment in the initial stage of colloid preparation. Meanwhile, a backup pump group, consisting of a backup water pump 9 and a jet pump 10, serves as a backup in case the main vacuum pump 8 fails. When the vacuum level of the main vacuum pump 8 fluctuates, the backup pump group regulates the vacuum level within the reactor 2 by evacuating air, ensuring vacuum stability within the reactor 2 during colloid synthesis.

[0031] The control module 1 is connected to the main vacuum pump 8 and the standby pump group for monitoring the vacuum and temperature inside the reactor 2. It is also used to control the standby water pump 9 and the jet pump 10 to operate at the current power when the temperature and vacuum inside the reactor 2 reach the set value, thereby maintaining the current vacuum and temperature inside the reactor 2.

[0032] Control module 1 is connected to the main vacuum pump 8 and the standby pump set via a communication line to monitor the vacuum and temperature parameters inside the reactor 2 in real time. When the current value is detected to meet the preset process requirements, control module 1 adjusts the operating power of the standby water pump 9 and the jet pump 10 to maintain them in optimal working condition, thereby ensuring that the temperature and vacuum inside the reactor 2 remain within a stable and controllable range. When the fluctuation of the vacuum level inside the reactor 2 exceeds the threshold, control module 1 adjusts the operating power of the main vacuum pump 8 until it returns to stability.

[0033] Specifically, when the vacuum level and sol temperature inside reactor 2 meet the set parameters, the main vacuum pump 8 and jet pump 10 operate normally and stably. When either the temperature or vacuum level inside reactor 2 increases by 0.1%, feedback is sent to control module 1. Control module 1 controls the standby water pump 9 to increase its working efficiency, thereby increasing the vacuum efficiency and maintaining the stability of the temperature and vacuum level inside reactor 2. When either the temperature or vacuum level decreases by 0.1%, the control cabinet first controls the standby water pump to operate at the lowest power. If this still cannot meet the process requirements, the control cabinet controls the working water pump to reduce its power to maintain process stability.

[0034] In some embodiments, the control module 1 is connected to a temperature sensor and a vacuum sensor located inside the reactor 2. The temperature sensor and the vacuum sensor are used to reflect the temperature and vacuum data inside the reactor 2 in real time.

[0035] The temperature sensor is used to monitor the temperature inside the reactor 2 and transmit the temperature data to the control module 1 in real time. The control module 1 stabilizes the temperature inside the reactor 2 based on the transmitted data. The vacuum sensor is used to monitor the vacuum level inside the reactor 2 and transmit the vacuum level data to the control module 1. The control module 1 then controls the vacuum level inside the reactor 2 within the optimal range for colloidal synthesis.

[0036] Furthermore, a vacuum gauge and a thermometer are installed on the outside of the reactor 2, allowing operators to observe the data inside the reactor 2 in real time using the data from the vacuum gauge and thermometer.

[0037] In some embodiments, the standby pump set includes multiple sets of standby water pumps 9 and jet pumps 10 connected in parallel, for switching to the standby pump set when the main vacuum pump 8 fails.

[0038] When the main vacuum pump 8 fails or is not working due to maintenance, the control module 1 automatically switches to the standby pump group to ensure that the vacuum environment in the reactor 2 is uninterrupted.

[0039] In some embodiments, a check valve 5 is provided on the connecting pipeline between the water pump and the jet pump 10. The check valve 5 is used to prevent the working medium in the jet pump 10 from flowing back to the main vacuum pump 8.

[0040] The installed check valve 5 prevents the working medium from flowing back from the jet pump 10 to the main vacuum pump 8 or the standby pump set, avoiding medium contamination and ensuring the independent operation stability of each pump.

[0041] In some embodiments, the vacuum equipment further includes a buffer tank 6, which is disposed between the reactor 2 and the main vacuum pump 8 and the standby pump group to reduce pressure fluctuations. The vacuum equipment also includes a pressure relief valve 7 disposed on the buffer tank 6, which is located at the bottom of the buffer tank 6 and connected to the control module 1. The pressure relief valve 7 is used to balance the pressure inside and outside the buffer tank 6.

[0042] The buffer tank 6, located between the reactor 2 and the vacuum pump system, is primarily used to absorb instantaneous pressure fluctuations during the vacuum pumping process, reducing the impact on the internal environment of the reactor 2 and improving vacuum stability. Specifically, when the main vacuum pump 8 or jet pump 10 malfunctions during the operation of the colloid generation system, the control module 1 controls the standby water pump 9 to start, maintaining stable system operation. When the equipment shuts down, the control module 1 controls the pressure relief valve 7 of the buffer tank 6 to slowly open, balancing the internal and external system pressures and eliminating equipment damage caused by sudden pressure changes.

[0043] In some embodiments, there are four reactors 2 arranged side by side on the steel platform 3. The steel platform 3 is provided with transverse reinforcing ribs and vertical anti-vibration supports to suppress the combined vibration when multiple reactors 2 are working simultaneously.

[0044] In some embodiments, the vacuum equipment supports the parallel operation of multiple reactors 2, and the control module 1 can adaptively adjust the power of the main vacuum pump 8 and the jet pump 10 according to the number of reactors 2 in operation.

[0045] In some embodiments, the standby water pump 9 controls the pumping speed of the jet pump 10 by adjusting the output water flow pressure, thereby adjusting the vacuum level inside the reactor 2.

[0046] The backup water pump 9 is equipped with a variable frequency control system, which can precisely adjust the output water pressure according to the instructions of the control module 1. This pressure change is used to change the working efficiency of the jet pump 10 to meet the different vacuum requirements of different process stages.

[0047] In some embodiments, the vacuum device further includes a water tank 4, which is connected to the jet pump 10 and circulated and cooled by an external cooling tower. The external cooling tower cools the circulating cooling water in the water tank 4.

[0048] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0049] The above provides a detailed description of a polycrystalline alumina fiber adhesive-based standby vacuum device. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of these embodiments are merely for the purpose of helping to understand the solution and core ideas of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A vacuum apparatus for synthesizing polycrystalline alumina fiber sol, used to synthesize polycrystalline alumina fiber sol by controlling the vacuum degree and temperature within a reaction vessel (2), characterized in that, include: The main vacuum pump (8) is connected to the reactor (2) and is used for the initial evacuation of the reactor (2); A backup pump set is connected to the reactor (2), and the backup pump set includes a backup water pump (9) and a jet pump (10). The control module (1) is connected in communication with the main vacuum pump (8) and the backup pump group. It is used to monitor the vacuum degree and temperature inside the reactor (2). It is also used to control the backup water pump (9) and the jet pump (10) to run at the current power when the temperature and vacuum degree inside the reactor (2) reach the set value, thereby maintaining the current vacuum degree and temperature inside the reactor (2).

2. A vacuum apparatus for the production of a polycrystalline alumina fiber colloid according to claim 1, characterized in that, The control module (1) is connected to a temperature sensor and a vacuum sensor located inside the reactor (2). The temperature sensor and vacuum sensor are used to reflect the temperature and vacuum data inside the reactor (2) in real time.

3. The polycrystalline alumina fiber adhesive-based standby vacuum device as described in claim 1, characterized in that, The standby pump group includes multiple sets of standby water pumps (9) and jet pumps (10) connected in parallel, used to switch to the standby pump group when the main vacuum pump (8) fails.

4. The polycrystalline alumina fiber adhesive-based standby vacuum device as described in claim 1, characterized in that, A check valve (5) is provided on the connecting pipeline between the water pump and the jet pump (10). The check valve (5) is used to prevent the working medium in the jet pump (10) from flowing back to the main vacuum pump (8).

5. A polycrystalline alumina fiber adhesive-based standby vacuum device as described in claim 1, characterized in that, It also includes a buffer tank (6), which is located between the reactor (2) and the main vacuum pump (8) and the standby pump group to reduce pressure fluctuations.

6. The polycrystalline alumina fiber adhesive-based standby vacuum device as described in claim 1, characterized in that, There are multiple reactors (2), and the reactors (2) are installed on the same steel platform (3) through flanges. The steel platform (3) is provided with horizontal reinforcing ribs and vertical anti-vibration supports inside, which are used to suppress the combined vibration when multiple reactors (2) work synchronously.

7. A polycrystalline alumina fiber adhesive-based standby vacuum device as described in claim 6, characterized in that, Specifically, there are four reactors (2), which are arranged side by side on the steel platform (3).

8. A standby vacuum device for polycrystalline alumina fiber adhesive as described in claim 5, characterized in that, It also includes a pressure relief valve (7) installed on the buffer tank (6), the pressure relief valve (7) is connected to the control module (1), and the pressure relief valve (7) is used to balance the pressure inside and outside the buffer tank (6).

9. A standby vacuum device for polycrystalline alumina fiber adhesive as described in claim 8, characterized in that, The pressure relief valve (7) is located at the bottom of the buffer tank (6).

10. A standby vacuum device for polycrystalline alumina fiber adhesive as described in claim 1, characterized in that, It also includes a water tank (4), which is connected to the jet pump (10) and circulated and cooled by an external cooling tower.

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