1. Before selecting the blower. For example, the varieties and specifications of blowers produced, the special uses of various products, the research and development and promotion of new products in the market, etc., should also fully consider the requirements of environmental protection, so as to select the best blowers. Choose ventilators for different purposes. If explosion and flammable gases are transported, explosion-proof ventilators should be selected; Dust exhaust or pulverized coal conveying blower should be selected; Anti-corrosion ventilator should be selected for transporting corrosive gas; High-temperature ventilators should be selected when working or conveying high-temperature gases in high-temperature situations.
2.According to the different physical and chemical properties of the gas delivered by the ventilator. Priority should be given to the one with higher efficiency, smaller machine number and larger adjustment range.
3. ventilator selection performance chart Chad has more than two kinds of ventilator to choose from. Of course, they should be compared and decided by weighing the pros and cons. In order to utilize the original motor shaft, bearings and supports.
4. If the diameter of the selected blower impeller is much larger than that of the original blower impeller. The starting time of the motor, the strength of the original components of the blower and the critical speed of the shaft must be accounted for. When the matched motor power is less than or equal to 75KW.
5. When choosing centrifugal blower. It is unnecessary to install a valve only for starting. When the centrifugal boiler induced draft blower is selected for discharging high-temperature flue gas or air, a valve for starting should be set to prevent overload during cold operation. The ventilator with high efficiency and low impeller peripheral speed should be selected first.
6. Ventilation system with noise elimination requirements. And make it work at the highest efficiency point; According to the propagation mode of noise and vibration generated by ventilation system, corresponding noise elimination and vibration reduction measures should be taken. Vibration reduction measures for fans and motors can generally be based on vibration reduction, such as spring shock absorber or rubber shock absorber. Parallel or series operation of ventilators should be avoided as far as possible. When it is inevitable.
7. When choosing a ventilator. blowers of the same model and performance should be selected to work together. When series connection is adopted, there should be a certain pipeline connection between the first stage ventilator and the second stage ventilator.
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