Economizer IntroductionBoiler economizer is part of the heating
area of boiler, to heat the feed water into saturated water inside
the flue ducting, due to its absorption of low temperature flue gas
heat, the economizer reduces the exhaust temperature of flue gas,
save the energy, improve the efficiency, so called as
economizer. Economizer steel tube type is without pressure
limit, can be used as a boiling type, generally made by the outer
diameter of 32 ~ 51 mm carbon steel tube.Sometimes in tubes with
fins and fin, to improve the heat transfer effect. Boiler
economizer is used for recovery of waste heat from boiler. Boiler
economizer is a device that is designed to increase the operating
efficiency of a boiler, cutting down on its operational costs over
the lifetime of the boiler. Although the savings on any given
day may be relatively small, the impact over time can be
significant; some boilers are designed with economizers built in,
while in other cases, an economizer can be fitted on after the
act. The boiler economizer acts as a waste heat recovery
device, ensuring that this heat does not go unused. Instead,
the heat is used to essentially preheat the water, so that less
heat is required to bring the water to a temperature high enough to
make steam. Diameter32Φ 38ΦTypeCasting iron economizer;bare
tube economizer;finned tubeEconomizer;spiral finned
tube economizerFin heightLess than 17mmFin pitch2.1-5mmFin
thickness3-4mmmaterialTube:Carbon steel,alloy
steel,customizedFin:copper;Aluminumadvantages 1.better product
quality and longer service life.2.energy conservation and
environmental protection.3.significantly improve
cycle efficiency.The economizer can absorb the heat of high
temperature flue gas,reduce the exhaust temperature,save energy,and
improve the efficiency of boiler. Non-standard size please
provide these parameterBoiler economizer(gas liquid heat
exchanger)designFlue gas inlet(temp.)Flue gas outlet(temp.)Liquid
inlet(temp.)Liquid outlet(temp.)Flue gas flowºCºCºCºCm3/hMain
ProductsWaste heat recovery boiler (WHRB)
-----Heat pipe heat recovery boiler
-----HRSG
-----Fire tube boiler (Heat Pipe) Economizer
(Heat Pipe) Air Preheater Low temperature heat recovery
equipment Thermal oil steam generator Heat
Exchanger ----Plate heat exchanger
----Tubular exchanger Pressure
vesselHeat PipePrinciple of heat pipeTypical gravity -type heat
pipe is as above. First, draw out the air of the sealed tube to
vacuum. Then fill some working fluid to the tube. The working fluid
is heated at the bottom. It evaporates when it absorbs heat. For
the sake of pressure difference, it rises up to the top of tube. It
condenses when meets the cold tube wall, and it releases the latent
heat at the same time. The condensed liquid drops down to the hot
side for gravity. It rises again when heated. So the heat is
transferred from one side to another side
continuously.Characteristics of heat pipeHigh thermal conductivity
Heat transfer coefficient of cold side and
hot side can be strengthened by spiral fins. This overcomes the
weakness of the low heat transfer coefficient of gas.
The speed of heat transfer coefficient of the heat pipe is of
several times of a copper stick of same size.Because of the
hot side and cold size are all in one tube, the temperature drop is
very small, the speed of heat transfer is very high. /*
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