The overall structure of the boiler includes two parts: the boiler, the auxiliary equipment and the safety device. The main components of the boiler, such as the furnace, the drum, the burner, the water wall, the superheater, the economizer, the air preheater, the frame and the furnace wall, constitute the core part of the production steam, which is called the boiler body. The two most important components in the boiler body are the hearth and the drum.
The internal structure of a rice-fired steam boiler is also called a combustion chamber, which is a space for fuel combustion. The furnace in which the solid fuel is placed on the grate and the combustion of the fire bed is called a layer burning furnace, also called a fire bed furnace; the liquid, gas or powdered solid fuel is sprayed into the furnace of the fire chamber and is called a chamber. The burning furnace, also known as the fire chamber furnace; the air is lifted by the coal particles to make it burn in a boiling state, and the furnace suitable for burning inferior fuel is called a boiling furnace, also called a fluidized bed furnace; the air flow is used to rotate the coal particles at a high speed. The cylindrical furnace that is strongly burned is called a cyclone furnace.
Furnace design
Furnace design requires full consideration of the characteristics of the fuel used. Each boiler should be burned as much as possible of the original design fuel. The economics and reliability of boiler operation may be reduced when fuels with different characteristics are burned.
Drum
It is a cylindrical container that receives the feed water from the economizer, connects the circulation loop, and delivers saturated steam to the superheater in the natural circulation and multiple forced circulation boilers. The drum is made of high-quality thick steel and is one of the most important parts in the boiler.
Main function of the drum
The main function of the drum is to store water, to separate the steam and water, to eliminate the brine and sludge in the pot water during operation, and to avoid the pot water containing high concentration of salt and impurities from entering the superheater and the steam turbine with the steam.
Drum internal device
Including steam and water separation and steam cleaning devices, water supply distribution pipes, sewage and dosing equipment. The function of the steam-water separation device is to separate the saturated steam and water from the water wall and to minimize the fine water droplets carried in the steam. The baffles and gap baffles commonly used in medium and low pressure boilers are used as coarse separation elements; the boilers above medium pressure are widely separated by various types of cyclones, and further separated by blinds, steel mesh or uniform steam plates. . Monitoring and protection facilities such as water level gauges and safety valves are also installed on the drum.
Design considerations
In order to assess performance and improve design, boilers are often subjected to heat balance tests. The method of directly calculating the thermal efficiency of boilers from the effective use of energy is called positive balance, and the method of calculating efficiency from various heat losses is called counterbalance. When considering the actual benefits of the boiler room, it is necessary to consider not only the boiler thermal efficiency but also the energy consumed by the boiler auxiliary machine.
When the LSS vertical fuel (gas) steam boiler is completely burned per unit mass or unit volume of fuel, the air demand calculated according to the chemical reaction is called the theoretical air amount. In order to make the fuel have more opportunities to be in contact with oxygen in the furnace, the amount of air actually fed into the furnace is always greater than the theoretical amount of air. Although the addition of air can reduce the incomplete combustion heat loss, the exhaust heat loss will increase, which will also increase sulfur oxide corrosion and nitrogen oxide formation. Therefore, efforts should be made to improve the combustion technology and strive to complete the combustion in the furnace with as little air excess as possible.
Linear High Bays,Garage Light Linear Highbay,Led Linear Highbay Light,High Lumen Linear High Bay Light
Fuonce Lighting , https://www.fuonce.com