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1. Applications for Single suction Secondary Forced Draft Fan  

♦ Boiler’s air supply and exhaust (Coal-fired boiler, Biomass boiler, Garbage incinerator, CFB boiler, Stokerfeed boiler…).

♦ Industrial boiler blowing air, Industrial boiler inducing air, Industrial boiler primary air, Industrial boiler secondary air.

♦ Industrial boiler waste gas desulfurization, Industrial boiler flue gas denitrification.

♦ Ventilating

♦ Cooling and heat dissipation

♦ Air purification and industrial waste gas treatment, Air filtration system, Flue gas desulfurization, Flue gas denitrification.

♦ Industrial kilns

♦ Energy and power

♦ Metal smelting

♦ Gas and materials delivery

♦ Other

Pressurization and decompression seal of industrial equipment, Recovery of industrial waste gas, Supply air and drying of food and drug production line.

2. Characteristics for Single suction Secondary Forced Draft Fan

♦ Cooling method of bearing, choosing low cost water cooling method or good heat dispersion oil cooling method according to gas temperature and running condition. Or installing BOX COOL for very high temperature medium condition to protect fan system operation reliable completely.

♦ Impeller of annealing treatment, completely eliminating structure of internal stress when welding, ensuring impeller  appearance won’t occur creepage and flaw.

♦ Regarding to material of impeller and main shaft, we will choose high strength carbon steel, low alloyed steel, High temperature resistant alloy steel, High temperature resistant high strength alloy steel according to different medium temperature and running speed, ensuring the impeller and main shaft keeping reliable strength in high temperature.

♦ Can flexibly adjust fan’s volume and pressure in running by air damper. Can also adjust fan’s pressure and volume by changing the fan speed via matching variable frequency motor.

♦ Can satisfy different dust loading conditions that low dust loading to a good deal dust loading, the surface hardness of impeller can reach to HRC60~70 after special processing, greatly extending impeller’s service life.

♦ Bearing housing reserves installation place for temperature and vibration sensors, can install easily of fan running monitoring device.

♦ Bearing housing adopt labyrinth type mechanical seal, unique design of spill prevention of inner, venthole design on top, commissure coated with sealing grease, completely eliminating bearing housing oil leak.

The motor load can be automatically reduced when airflow resistance is increasing, to prevent motor from destroying.

♦ The welding line of impeller and main shaft passed ultrasonic flaw detection, ensuring no defect of welding and materials, guarantee strength.

♦ Impeller passed high standard dynamic balancing, ensuring stable running of fan.

♦ Running test and vibration value test for fans after finishing manufacturing, ensuring running reliably.

3. Structure for Single suction Secondary Forced Draft Fan

        ♦ Impeller Type: Backward blade

♦ Driving Mode: Coupling drivetrain

♦ System Type: Single inlet type, Overhang type.

♦ Cooling Type: Circulating Water cooling/Forced circulation oil cooling.

♦ Bearing Lubrication Methods: Oil bath lubrication/Oil circulating lubrication

♦ Basic Components: 

Motor, Impeller, Impeller cone (Air Inlet), Case, Damper, Main shaft, 
Bearing, Bearing housing, Pin coupling,Foundation bolt.

♦ Optional Components:

System base frame, Protective screening, Silencer, Inlet & Outlet pipeline compensator,
Inlet & Outlet flange, Electric actuator, Shock isolator, Diaphragm coupling, Fluid coupling, 
Motor rain cover, Temperature sensor, Vibrating sensor, Soft starter, Inverter, Special Electrical Motor,
System monitoring Instrument, Lube system, Overhead lube tank...