Industrial Boiler classification and structure overview
Boiler classification and structure overview
The classification of boilers can classify boilers from different angles
1. According to the purpose, it can be divided into: power station boilers, industrial boilers, locomotive boilers and ship boilers.
2. According to capacity, it can be divided into: large boiler, medium boiler and small boiler. It is customary to call a boiler with an evaporation rate greater than 100 tons/hour a large boiler, a boiler with an evaporation rate of 20 tons/hour to 100 tons/hour as a medium-sized boiler, and a boiler with an evaporation rate of less than 20 tons/hour as a small boiler. boiler.
3. According to steam pressure, it can be divided into low-pressure boiler (pressure ≤ 1.57MPa), medium-pressure boiler (pressure 2.45MPa and 3.82MPa), high-pressure boiler (pressure 9.81MPa), ultra-high pressure boiler (pressure 13.73MPa), subcritical Boilers (with a pressure of 16.67MPa) and supercritical boilers (with a pressure exceeding 22MPa, that is, higher than the critical pressure)
4. According to fuel types and energy sources, they can be divided into coal-fired boilers, oil-fired boilers, gas-fired boilers, atomic energy boilers, and waste heat (waste heat) boilers.
5. According to the fire tube boiler (fire tube boiler), water tube boiler, and water according to the fuel combustion method, it can be divided into layer-burning furnace, fluidized fluidized furnace, and room-burning furnace.
6. According to the flow mode of working medium, it can be divided into spontaneous combustion circulation boilers, forced circulation boilers, once-through boilers, etc.
Power plant boilers generally have high pressure (above medium pressure) and large capacity (above medium-sized), and water tube boilers that use chamber combustion can be divided into many types
Industrial boilers generally have small capacity (below 65 tons/hour) and low pressure (2.45MPa and below). Most of them adopt layer combustion structure and various types of combustion equipment, which are mainly used for steam in industrial production, heating, and life.