Reward-based survey on the use of frequency converters for boiler exhaust fans
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To better promote the concept of energy conservation, an investigation is being conducted on the induced draft fans (blowers) of various devices for the reference of all our members! The recommended format is as follows: Exhaust fan: Tube furnace waste heat recovery system, model Y4-73 15D. Rated power: 315 KW; actual power usage: 90 KW. Voltage: 6 KV. Due to excessive capacity, the impeller diameter was changed to 14D; the frequency remains unchanged (planned)
These days, a hydraulic coupling is generally installed between the exhaust fan and the motor. Firstly, hydraulic coupling technology is quite mature, and its cost is much lower than that of installing an inverter with the motor; it also provides better protection for the equipment’s service life, along with significant energy-saving benefits
Our company only uses frequency converters for the blowers (the second and third stage blowers); frequency converters are not used for the exhaust fans.
What is the purpose of using an inverter or a hydraulic coupling?
Dear experts, generally, pumps can be driven by electricity or by steam. In what situations is electric drive used? Under what circumstances is steam drive used? Is there a boundary line?
Both the blower and the exhaust fan can have their frequency adjusted, which results in energy savings; moreover, it makes it easier to control the air volume. Under normal conditions, an electric pump is used to drive the water pump; in the event of a sudden power outage, a steam-driven pump is activated to ensure a supply of water for the boiler.
That’s right; the key with boilers is to ensure a continuous supply of water. We use 60-ton gas boilers.
A hydraulic coupling can only reduce the starting current and the impact on the power grid during startup; it does not serve any purpose of saving energy for devices that operate for long periods in either the on or off state! ! !
Exhaust fan: Electric zinc reduction induction furnace, model 750KVA; rated power of the exhaust fan: 30 KW, actual power used: 17 KW; voltage: 380V, frequency remains unchanged (planning to replace the fan)
Fan: Dry kiln model 2.20*12.00; rated power: 75 KW; actual power usage: 43 KW; voltage: 380V, frequency unchanged
Here, changing the frequency of both the blowers and exhaust fans has given good results