Practical Experience on Bed Temperature Control Optimization of CFB Boiler for Reducing Unburned Carbon in Fly Ash
Circulating Fluidized Bed (CFB) boilers feature wide fuel adaptability, strong load regulation capability and favorable environmental performance, which are widely applied in thermal power plants and chemical captive power stations. Nevertheless, a prevalent operating problem is high unburned carbon content in fly ash. This issue directly reduces boiler thermal efficiency, increases net coal consumption and […]
Wear Mechanism of Boiler Water-Cooled Air Chamber and Application Practice of Laser Cladding Repair
AbstractThe water-cooled air chamber of a boiler is a core pressure-bearing and ventilation component of circulating fluidized bed (CFB) boilers and coal-fired boilers. Operating under harsh conditions of high temperature, heavy dust and high-velocity gas flow erosion, it frequently suffers from wall plate wear, local thickness reduction and perforation leakage. These faults directly threaten the […]
Boiler Pin-Studded Tube Manufacturing Process Guidelines and Welding Quality Control Plan
Pin-studded tubes are critical heating surface components in circulating fluidized bed (CFB) boilers, heat recovery steam generators (HRSGs), and selective catalytic reduction (SCR) denitrification systems. Pins welded onto the tube wall anchor refractory castables, providing erosion resistance, thermal insulation, and structural protection for the tubing. Manufacturing precision, stud-weld strength, and dimensional stability directly determine boiler […]
Practical Significance of Water-Cooled Air Chamber in Field Application
The water-cooled air chamber is a core supporting component of circulating fluidized bed (CFB) boilers. Different from conventional insulated air chambers, its water-cooled structural design fundamentally addresses various operational drawbacks of traditional air chambers under high-temperature conditions. It delivers great practical value for the long-term stable, safe and economical operation of boilers. Its key practical […]
Functions and Practical Application of Boiler Steam Drum
The steam drum is the core highpressure pressurebearing component of naturalcirculation and multipleforcedcirculation boilers. Located at the highest point of the boiler water circulation circuit, it connects the whole process of feedwater supply, vaporization and steam generation. It is widely applied in thermal power, chemical, heating and other industrial boilers, serving as critical equipment for […]
Practical Application of FireTube Boilers
Firetube boilers (also known as shell boilers) work on the principle that flue gas flows inside the tubes while water circulates outside the tubes for heat exchange. They feature compact structure, large heat storage capacity, good load adaptability, low waterquality requirements, simple maintenance and low cost. Restricted by structural design, they are only suitable for […]
Practical Application Scenarios of HRSG
The core principle of a Heat Recovery Steam Generator (HRSG) is to recover high-temperature waste flue gas heat from equipment such as gas turbines, industrial kilns, and engines. Without needing supplementary firing, it produces steam or hot water to achieve waste heat resource utilization. Featuring benefits such as energy savings, carbon reduction, improved energy efficiency, […]
Detailed Application of Heat Recovery Steam Generator (HRSG)
A Heat Recovery Steam Generator (HRSG) is the core heat exchange equipment in Combined Cycle Power Plants (CCPP). Operating strictly through thermal recovery without supplementary firing, an HRSG extracts sensible heat from high-temperature exhaust gas to realize energy reuse. It is widely deployed across power generation, industrial processes, and new energy sectors, serving as critical […]
Daily Maintenance and Overhaul of Superheaters
The superheater is a core heat-absorbing component of boilers. It converts saturated steam into high-temperature superheated steam. Its operating condition directly affects boiler efficiency, steam quality and unit safety. Subject to long-term high temperature, high pressure and scouring by dust-laden flue gas, the superheater is prone to failures such as ash fouling and coking, pipe […]
Maintenance and Care of Economizer
The economizer is a core heat exchange device that recovers waste heat from boiler flue gas to heat feed water, achieving energy saving and efficiency improvement. During long-term operation, the equipment is prone to fouling, abrasion, corrosion, leakage and other faults. Standardized maintenance ensures stable boiler operation, reduces energy consumption, and extends the service life […]
Detailed Explanation of the Coupling Effect among Economizer, Superheater and Water Wall
Water walls, superheaters and economizers are the three core heating surfaces of a boiler, which generally follow the counter-flow heat exchange principle: flue gas flows downward while steam and water flow upward. The operating conditions of the three components are mutually coupled and restricted. Any change in the operating condition of one heating surface will […]
Core Design Considerations for Boiler Economizers
As a critical pressure-retaining waste heat recovery component in boiler systems, the core design of an economizer aims to ensure operational safety and equipment durability while balancing heat transfer efficiency, low resistance, and low operation and maintenance (O&M) costs. Key focus areas include preventing common failures such as low-temperature corrosion, erosion wear, ash accumulation/tube plugging, […]