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The Boiler Structure Is Simple And Reliable
Oct 24, 2017

A boiler is a device that generates heat or water by heat exchange with the heat released by coal. Boiler mainly by the 'pot' and "furnace" composed of two parts.


"Pot" refers to the water and sealed with a pressure vessel, the drum connected to the convection cycle tube bundle to increase the heat transfer capacity, Boiler Stoves its role is to directly absorb the fuel released from the heat and water delivery.


Drum can be divided into vertical, horizontal, single drum and double drum and other types.


"Furnace" is composed of grate and flue pipe bundle and so on, Boiler Stoves so that the coal fully burned, so that the heat released by the fuel and the water inside the kettle for heat exchange, cinder and flue gas through the grate and chimney discharge furnace.


The above two parts can be assembled into a whole can be different types of boilers.


The general evaporation of the boiler are relatively small, are below 40 to 10-35 or so, and the use of the boiler and the power station is not the same boiler, boiler main steam and hot water requirements indicators are not very high, the general purpose of Some industrial steam used, such as heating furnace steam seal, Boiler Stoves steam hot water heating and other uses, many forms of boiler, but most of the chain furnace to the majority, because the chain furnace technology is mature, simple and reliable structure, but also to achieve automation, and other factors, by large Most boiler users of all ages. The structure of the chain furnace is chain grate, coal gate, eagle iron, furnace, slag pipe, water wall, upper and lower sets of boxes, superheater (steam boiler), convection tube bundle, upper and lower set (also known as drum) Coal, air preheater, and the corresponding auxiliary systems and pumps and fans, Boiler Stoves as well as instruments and other devices. Its structure is characterized by the formation of a variety of water wall before and after the wall, the role is to promote the ignition and combustion, so that combustion more complete. Furnace with a wind warehouse, according to the specific distribution of coal charcoal distribution of air volume.


Power plant boilers are mainly pulverized coal and circulating fluidized bed boiler, the evaporation of large, high efficiency, the structure and the chain furnace is different from the pulverized coal furnace and circulating fluidized bed boiler structure is similar, but the principle is different, And circulating fluidized bed boilers are with a ventilated bed, a wind from the bed at the end of the drum, Boiler Stoves the secondary air carrying coal into the furnace to form a mixed combustion, Boiler Stoves burned by the cyclone separator is not completely burned Pulverized coal to re-burn, and fluidized bed boiler to form a fluidized form of coal than the pulverized coal furnace combustion effect is better, full combustion, but also to achieve a low temperature combustion, reducing the nitrogen oxide emissions.


Boiler classification of many ways, mainly:


(1) according to the combustion method points: a layer of furnace, Boiler Stoves air burning furnace, cyclone furnace and so on.


(2) by burning fuel points: a coal-fired stove, fuel stoves, gas stoves and so on.


(3) by the working fluid flow characteristics: a natural circulation boilers, forced circulation boilers, composite cycle boilers, such as DC boilers.


(4) by boiler capacity points: a small capacity, medium capacity, Boiler Stoves large capacity boiler or called (small, medium, large boilers).


(5) according to the steam parameters: low pressure, medium pressure, high pressure, high pressure, subcritical pressure, supercritical pressure boiler.


(6) according to the layout of points: a indoor, semi-open-air, open-air boilers.


(7) by slagging method points: a solid slag, liquid slagging boiler.


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