Customer FAQ
1. How does the ultrasonic device emit ultrasonic waves into our materials?
A: Ultrasound equipment converts electrical energy into mechanical energy through piezoelectric ceramics and converts it into acoustic energy. The energy passes through the transducer, the horn and the tool head, and then enters the solid or liquid, so that the ultrasonic waves interact with the material.
2. Can the frequency of the ultrasound device be adjusted?
Answer: The frequency of ultrasonic equipment is generally fixed and cannot be adjusted at will. The frequency of ultrasonic equipment is determined by its material and length. When the product leaves the factory, the frequency of the ultrasonic device has been determined. Although the environmental conditions such as temperature, air pressure and humidity slightly change, the change is not more than ±3% of the factory frequency.
3. Can the ultrasonic generator be used in other ultrasound equipment?
A: No, the ultrasonic generator is in one-to-one correspondence with the ultrasonic equipment. Because of the difference between the vibration frequency and the dynamic capacitance of different ultrasonic equipment, the ultrasonic generator is customized according to the ultrasonic equipment, and the ultrasonic generator cannot be replaced at will. .
4. How long is the service life of sonochemical equipment?
A: If it is used normally and the power is below the rated power, the ultrasonic equipment can be used for 4-5 years. The system uses a titanium alloy transducer for greater stability and longer life than conventional transducers.
5. What is the structure diagram of sonochemical equipment?
A: The picture on the right shows the industrial-grade sonochemical structure diagram. The structure of the laboratory-level sonochemical system is similar. The horn is different from the tool head.
6. How to connect the ultrasonic equipment and the reaction container, how to deal with the sealing?
A: The ultrasonic device is connected to the reaction vessel through a flange, and the flange shown on the right is used for connection. If sealing is required, it is necessary to assemble sealing equipment such as gaskets at the joint. Here, the flange is both a fixture for the ultrasonic system and a common cover for chemical reaction equipment. Since the ultrasonic system has no moving parts, there is no dynamic balance problem.
7. How to ensure the thermal insulation and thermal stability of the transducer?
A: The ultrasonic transducer zui high allowable operating temperature is about 80 °C, so our ultrasonic transducer must be cooled. At the same time, it is necessary to perform appropriate isolation according to the high operating temperature of the customer's equipment. That is, the higher the operating temperature of the customer equipment, the longer the length of the horn connecting the transducer and the emitter.
8. When the reaction vessel is large, is there any effect in the place far from the ultrasonic equipment?
Answer: When the ultrasonic equipment radiates ultrasonic waves in the solution, the wall of the container will reflect the ultrasonic waves, and the Zui will eventually distribute the sound energy inside the container evenly. The terminology is called reverberation. At the same time, since the sonochemical system has the function of stirring and mixing, strong sound energy can still be obtained at a solution far away, but the reaction speed is subject to an impression. In order to increase the rate, when the container is large, we recommend using multiple sonochemical systems simultaneously.
9. What are the requirements of the acoustic chemical system for environmental conditions?
A: Use environment: indoor use;
Humidity: ≤85% RH;
Ambient temperature: 0°C—40°C
Power supply size: 385mm × 142mm × 585mm (including external parts of the chassis)
Use space: the distance between surrounding objects and equipment should not be less than 150mm, and the heat dissipation port should not be less than 200mm.
Solution temperature: ≤300°C
Solvent pressure: ≤10Mpa
10. How do you know the intensity of the ultrasound in the liquid?
A: Generally speaking, the power of ultrasonic waves per unit area or per unit volume is called the intensity of ultrasonic waves. This parameter is the key parameter for the action of ultrasonic waves. The ultrasonic intensity varies from place to place throughout the ultrasonically acting container. The ultrasonic sound intensity measuring instrument delivered by Hangzhou Ultrasonic Ultrasonic is dedicated to the measurement of ultrasonic intensity at various positions in the liquid. See the related page for details.
11. How to use a high-power sonochemical system?
A: The ultrasound system has two usages as shown on the right.
The reactor mode is mainly used for the sonochemical reaction of flowing liquid, and the reaction kettle is provided with a water inlet hole and a water outlet hole. The ultrasonic transmitter is inserted into the liquid, and the container is fixed by flange between the sonochemical probe. The company has configured the corresponding flange for you. The flange is used for fixing on the one hand and the high pressure sealed container on the other hand. need. For the volume of the container solution, please refer to the laboratory-level sonochemical system parameter table (page 11), and the ultrasonic probe is immersed in the solution 50mm-400mm.
The large volume quantitative container method is used for sonochemical reaction of a certain amount of solution, and the reaction liquid does not flow. Ultrasonic waves act on the reaction liquid through the tool head. This reaction mode has a uniform effect, high speed, and easy control of reaction time and yield.
12. How is the laboratory-grade sonochemical system used?
A: The recommended method of the company is as shown on the right. The container is placed on the base of the bracket, and the bracket rod is used for fixing the ultrasonic probe. The bracket rod must be connected only to the fixing flange of the ultrasonic probe. The fixing flange has been installed for you. This picture shows the use of a sonochemical system in an open container (no seal, normal pressure). If the product needs to be used in a sealed pressure vessel, the flange provided by the company will be a sealed pressure-resistant flange. You need to provide a sealed pressure-resistant container.
For the volume of the container solution, please refer to the laboratory-level sonochemical system parameter table (page 6), and the ultrasonic probe is immersed in the solution 20mm-60mm.
13. How far is the distance of ultrasonic action?
A: As we all know, ultrasound was first developed from the military use of submarine, underwater communication, underwater measurement, etc. This discipline is called hydroacoustics. Obviously, the reason why ultrasound is used in water is precisely because the propagation characteristics of ultrasonic waves in water is very good, and it can travel far and far, even more than 1000 kilometers. Therefore, in the application of sonochemistry, no matter how large or small the shape of your reactor, ultrasonic waves can fill it. There is a very figurative metaphor here: it is like installing a lamp in a room, no matter how big the room is, this lamp can always cool the room. However, the farther away from the light, the darker the light. The same is true for ultrasound. Similarly, the closer the ultrasonic head is, the stronger the ultrasonic intensity (the ultrasonic power per unit volume or unit area). The lower the average power of the reaction mixture is.