Though Air exchanger
is a negligible part for people’ daily life, but it brought the healthy and
comfortable enjoy and become the good assistant of People's Daily life. So, how
to choose the suitable one? Here is detail in the method of choosing and buying.
Choose ventilation unit should be combined with equipment usage, technological
requirements, occasions to determine the factors such as fan type, model and
structure material, etc., making choice in line with their own best demand. The
following eight summarizes hope to help you:
1) before making decision, you should
understand the domestic in production and product quality, such as production
in ventilator varieties, specifications and various products of special
purpose, new product development and promotion. Besides, still should give full
consideration to the requirements of environmental protection, in order to
select the fan.
2) according to the different characters in
physical, chemical of conveying gas, choose different air exchanger for usage. Such
as delivery exploded air should elect anti-exposure air exchanger. Dust or
conveying of pulverized coal should choose dust or pulverized coal. Transport
corrosive gas should choose anti-corrosion ventilator. In high temperature
occasion work or conveying high temperature gas should choose high temperature,
etc.
3) If there are two more ventilators available,
it should give priority to higher efficient one, the adjusting range larger, of
course, should also be compared, weigh the pros and cons and then decided.
4) if the selected fan impeller diameter
than original fan impeller diameter partial big many, in order to use the
original motor shaft, bearing and the bearing, etc., have to motor start time,
fan original parts of strength and shaft critical speed of accounting.
5) choose centrifugal air unit, when the
motor power with less than or equal to 75 kw, not only have to start with the
valve. When the row send high temperature flue gas or air and choose
centrifugal boiler induced draft fan, should establish starter valve to prevent
cold caused by overload running.
6) erase requirements of the ventilation
system, should be first selection efficiency is high, the impeller rotational
speed is low, and the change of it in the highest efficiency point work. It Still
should according to the ventilation system of the noise and vibration mode of
transmission, adopt corresponding noise elimination and vibration reduction
measures. In qi and motor vibration reduction measures, general can use damping
foundation, such as spring shock absorber or rubber shock absorber, etc.
Air exchanger should consider making full
use of the original equipment, suitable for the manufacture, installation and
safety running etc.
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