Heating section of the boiler’s heat-exchanging surface
Thread Content
The heating surfaces of a steam boiler are divided into the heating section, the evaporation section, and the superheating section. What are the main equipment components in the heating section?
I think the function of the heating section is similar to that of the economizer; it is meant to heat the medium.
I think it should be the heating surface of the economizer； The convective heating surfaces and the water wall heating surfaces are evaporation heating surfaces ； The superheating and reheat heating surfaces are superheating heating surfaces.
Explanation: Boiler: A device that uses the heat generated by fuel combustion to heat a working fluid and produce steam at a certain temperature and pressure； The part that generates heat is called the “furnace,” while the part that absorbs heat is called the “pot.” The heat-exchanging surface referred to by the original poster is the “boiler”; the main equipment in the heating section is the economizer, which is a heat exchanger that uses the heat from the medium-temperature flue gas at the boiler’s rear end to heat the boiler feed water ； The main equipment in the evaporation section is the evaporation tubes and the water wall; these components utilize the radiant heat from the high-temperature flue gases and flames inside the furnace to heat the furnace water to saturated steam ； The main equipment in the superheating section is the superheater, which is a heat exchanger that uses the heat from high-temperature flue gas to heat saturated steam to a certain temperature, resulting in superheated steam.
The heating section includes a economizer, water wall, and water-cooled screen (screen-type water wall)
Boiler has two meanings: the “pot” refers to the water and steam system； The furnace is the combustion system, while the steam generation system can be divided into two categories based on its function of producing steam: 1. Evaporation surfaces – such as water-cooled walls, economizers, and water-cooled screens – which are responsible for generating steam in the boiler ； 2. Superheating surfaces – low-temperature superheaters, high-temperature superheaters, screen superheaters, etc. These are used to increase the temperature of steam; in other words, they improve the quality of steam. Evaporation surfaces, on the other hand, are used to increase the quantity of steam. The term “heating section” mentioned by the original poster probably refers to the economizer, but this expression is not precise