Blowers and exhaust fans of the heating furnace
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What is the difference between the blower and exhaust fan in a heating furnace, and what are their respective functions? Precautions for commissioning, thanks. Last edited by Shuichangshou on 2009-3-24 16:45]
The blower draws in air, which then enters the furnace through the blower； A draft fan is generally used to draw flue gas from the chimney or other parts of the furnace in order to preheat the air; when it is put into use, a cold medium is used first
One fan is used for drawing in air, and the other for forcing air out; the air intake fan delivers fresh air into the heating furnace, while the exhaust fan removes the smoke generated after combustion. When putting it into use, the air forcing fan should be turned on first. Make sure to close the inlet valve before starting, and open the outlet valve; open the inlet valve after the motor starts.
The medium for the exhaust fan is hot flue gas with high temperature, while the medium for the blower is fresh air. The operation procedures follow those outlined in the start-up and shutdown plan for the flue gas waste heat recovery system; the start-up conditions are the same in both cases, namely with the inlet and outlet butterfly valves closed, starting at 0 load
1. Different types of fans are used depending on the hot and cold media. . . 2. When putting it into use, turn on the cold water first, then the hot water. . . :lol
The simplest way to understand it is this: one is in front of the furnace and the other behind it; when starting, of course, you start with the one in front of the furnace first
The blower supplies the air required for combustion in the heating furnace, while the exhaust fan draws out the flue gas after combustion, exchanges heat with the air, and then discharges it.
The blower is used to force air flow, providing the air necessary for combustion in the furnace; it is located in front of the furnace, and the medium used is air； The exhaust fan is used to draw air away, carrying the flue gas resulting from combustion out of the system; it is located behind the furnace, and the medium handled by it is high-temperature flue gas.
The blower supplies fresh air to the heating furnace, while the exhaust fan draws out the flue gas after combustion; this gas exchanges heat with the air introduced by the blower before being discharged
The blower exchanges heat between the atmosphere and the hot flue gas before supplying it to the heating furnace, while the exhaust fan draws the burned flue gas out and sends it to the chimney for discharge. Turn on the blower first when starting.
The blower exchanges heat between the atmosphere and the hot flue gas before supplying it to the heating furnace, while the exhaust fan draws the burned flue gas out and sends it to the chimney for discharge. Turn on the blower first when starting up. While operating the machine, pay attention to the motor load of the exhaust fan; when the flue gas temperature has not reached the designed operating temperature, reduce the load valve, otherwise the exhaust fan is prone to overload.
The blower is used to force air flow, providing the air necessary for combustion in the furnace; it is located in front of the furnace, and the medium used is air； The exhaust fan is used to draw air away, carrying the flue gas resulting from combustion out of the system; it is located behind the furnace, and the medium handled by it is high-temperature flue gas.
The blower is used to supply oxygen to the heating furnace; generally, the oxygen level in the heating furnace is related to the frequency of the blower and the opening degree of the air valves. How can blowers and dampers be used to adjust oxygen levels? The function of the exhaust fan is to draw out the hot flue gas from the furnace, and it should also serve to regulate the negative pressure inside the furnace. Some heating furnaces have only blowers and no exhaust fans. Why is this?
A blower is used to push air into the furnace, while an exhaust fan is used to guide the smoke from the furnace back for reuse