Comparison of several commonly used humidification methods and the principle of the introduction
1, several common methods of industrial humidification and simple comparison
Centrifugal humidifying method
Advantages: low cost, mature technology.
Disadvantages: large particles, poor uniformity, is not conducive to control product quality, waste water.
Suitable for outdoor humidification.
High pressure humidifying method
Advantages: fine spray particles, can be used indoors.
Disadvantages: the need for high-pressure air pump, water quality requirements, noise interference.
Wet film humidifying method
Advantages: clean, no noise.
Disadvantages: large volume, small amount of moisture.
Steam humidification
Advantages: small spray particles and gasification, isothermal humidification.
Disadvantages: large energy consumption.
Ultrasonic humidification:
The utility model has the advantages of small size, low energy consumption, and no mechanical noise
Disadvantages: high water quality requirements.
2, ultrasonic material and atomization principle
The piezoelectric ceramic piezoelectric ceramic is mainly composed of lead zirconate titanate (PZT) formed in zirconium oxide (ZrO2), lead (PbO) and titanium oxide (TiO2) powder raw materials, according to a certain proportion, adding trace additives, composed of a plurality of processing procedures complete ceramic powder production, and the use of hydraulic machine the compressed into various specifications and shapes, sintered at about 1350 DEG C temperature after molding, the finished product, and then to the method of plating or stainless steel coating method after work is completed the electrode polarization, piezoelectric ceramic wafer products.
Ultrasonic atomization principle: the use of piezoelectric ceramic ultrasonic oscillation inherent characteristics, through certain means of oscillation circuit and piezoelectric ceramic, the inherent oscillation frequency of resonance, can be directly with the liquid atomization piezoelectric ceramic contact into tiny particles of 1--3 M. The principle is that the ultrasonic oscillation circuit, transmission to the surface of the piezoelectric ceramic vibrator, piezoelectric ceramic vibrator will produce axial mechanical resonance changes, the change of mechanical resonance and then transmitted to contact with the liquid, the liquid surface uplift, and the occurrence of cavitation in the surrounding uplift, resulting from the impact of cavitation the vibration frequency of wave oscillator is repeated, the surface tension of the liquid surface wave with finite amplitude. This tension wave scattering head, the atomization of liquid, produced a large number of negative ions at the same time.
Atomization unit and atomization quantity: because of the oscillation frequency of the piezoelectric ceramics formed by itself, it can only produce a shock wave. If you need to increase the amount of atomization, you can only use a group of parallel work at the same time to achieve. The lifetime of the piezoelectric ceramics is considered by the existing technology, the power of each oscillator is 0.25W, and the atomization quantity is 0.3L. Due to the different surface tension of the liquid solution, the atomization of the liquid is not exactly the same, the larger the surface tension of the liquid, the smaller the amount of atomization, the greater the contrary. The liquid with different impurities, have a certain impact on the service life of the equipment, atomization and maintenance cycle, taking water as an example, when the water calcium, magnesium, silicon acid content is high, all kinds of humidification methods will be affected to a certain extent, affect the humidification efficiency, even cause damage to the equipment, and then ultrasonic humidifier, water calcium and magnesium, silicon acid content is high, will cause the negative effect of fouling, humidifying atomizer itself environmental pollution etc..
