What are the characteristics of high-pressure boiler induced draft fans?

What are the characteristics of high-pressure boiler induced draft fans?

Furthermore, much has been discussed regarding high-pressure boiler induced draft fans, highlighting the characteristics of those used for flue gas exhaust. 1. The HTF(A) high-pressure boiler induced draft fan features an axial flow design, with the gas flowing parallel to the fan shaft. Its key features include high airflow, low noise and stable performance. 1.1. By preventing direct contact between the airflow and the motor, these fans minimise the damage caused to the motor by harmful and high-temperature gases. They offer excellent performance, high temperature resistance and high efficiency, making them superior specialised high-pressure boiler induced draft fans. The use of Class F insulation high-temperature motors facilitates installation and handling. 2.2. The HTF(A) high-pressure boiler induced draught fan for high-temperature exhaust has passed inspections by the ‘National Fire Equipment Quality Supervision and Inspection Centre’, demonstrating top-tier domestic performance. It has been recognised by fire departments in over 30 provinces, cities and counties across the country, has won numerous accolades, and has become the product of choice for major domestic projects. 3.3. Excellent high-temperature resistance: The high-pressure boiler induced draught fan has been tested to meet fire safety standards. The fan is specially designed and manufactured, equipped with a high-temperature motor featuring an independent cooling system. It can operate continuously for over 120 minutes at 300°C and run for 22 hours without damage at 100°C. Its high-temperature resistance exceeds national standards. 4.4. Wide-ranging applications: Depending on the user’s specific requirements, single-speed, dual-speed or multi-speed configurations can be employed to achieve dual functions with a single unit (i.e. general ventilation during firefighting operations and high-temperature exhaust). High-pressure boiler induced draught fans (typically duct-mounted) are selected. Air supply and exhaust can commence at low speed, whilst in the event of a fire, high-speed operation can be engaged to provide personnel with sufficient time to evacuate. Blade profiles are categorised into axial flow (HTF(A)-I, II) and mixed flow (HTF(A)-IG). They are further classified into front-exhaust and side-exhaust types. 5.5. Efficiency: This series of high-pressure boiler induced draft fans utilises advanced CAD software designed and developed by the company’s technical department in collaboration with relevant universities. Tests by authoritative organisations have shown that fan efficiency exceeds 85%, with some large units achieving over 90%. They are characterised by a flat efficiency curve that contributes to energy conservation and environmental protection, promoting green and low-carbon practices. 6.6. Installation is simple, and they occupy less space than centrifugal fans. The basic design allows these high-pressure boiler induced draught fans to be connected directly to air ducts or mounted on walls. Installation configurations include horizontal floor-mounted and suspended types. Floor-mounted installations require the fitting of a shock absorption system. Suspended installations utilise high-strength spring pads, rubber pads or spring pad hangers, secured with screws to provide shock absorption. The system effectively dampens the fan’s own mechanical vibrations, reducing the transmission of vibrational forces and preventing their intrusion, thereby ensuring the normal operation of the high-pressure boiler induced draught fan.