I. Boiler Series and Main Types
1. Classified by Fuel Type
Oil/Gas Boilers: Such as the WNS series (horizontal internal combustion chamber boiler) and SZS series (double drum longitudinal boiler), supporting natural gas, light oil, heavy oil, and other fuels.
Coal-fired Boilers: Such as the DZL series (single drum longitudinal chain grate boiler) and SZL series (double drum chain grate boiler), using coal as fuel; characterized by lower costs but poorer environmental performance.
Biomass Boilers: Such as the SZL series (double drum chain grate boiler) and DZH series (single drum longitudinal movable grate boiler), utilizing renewable resources like agricultural waste (peanut shells, corn cobs, etc.).
Electric Heating Boilers: Using electricity as the heat source, suitable for scenarios with high environmental protection requirements, such as energy-saving electric boilers.
Thermal Oil Boilers: Such as the YYQW series (organic heat carrier boiler) and YLW series (square coil horizontal chain grate package boiler), used for low-pressure and high-temperature industrial heating.
2. Classified by Structure
Vertical Boilers: Compact in size, suitable for small workshops or low-load scenarios.
Horizontal Boilers: Large volume and extensive heat exchange area, suitable for large-scale industrial continuous heating demands.
Vacuum Boilers: Such as the ZWNS series and YDB series, providing hot water through the phase change principle, offering high safety.
3. Classified by Medium
Steam Boilers: Used for processing, drying, and other processes in industrial production.
Hot Water Boilers: Mostly used for civil heating and domestic hot water supply.
II. Size, Model, and Capacity Range 
Small Boilers
Steam Boilers: Evaporation capacity ≤ 20t/h (e.g., WNS series 1-20t/h).
Hot Water Boilers: Thermal power 0.7-14MW (e.g., WNS series 0.7-14MW).
Medium-sized Boilers
Steam Boilers: Evaporation capacity 20-75t/h (e.g., SZS series 20-110t/h).
Hot Water Boilers: Thermal power 29-116MW (e.g., DHL series 29-140MW).
Large Boilers
Steam Boilers: Evaporation capacity ≥ 100t/h (e.g., circulating fluidized bed boiler 10-100t/h).
Power Station Boilers: Can reach gigawatt level (supercritical and ultra-supercritical models).
III. Main Application Scope
Power Generation: Power station boilers drive steam turbines for electricity generation.
Industrial Heating: Providing steam for chemical, textile, and other industries; thermal oil boilers used for high-temperature processes.
Civil Field: Heating and domestic hot water supply for residential districts, hotels, schools, and other venues.
Special Scenarios: Marine boilers meet ship power demands; biomass boilers adapt to the resource utilization of agricultural waste.