Export Amercian Sprial Type Integral Boiler Economizer ND Steel Or Carbon Steel

Export amercian sprial type integral economizer ND steel or carbon steel
 

 
 
Product Description

· Economizers are mechanical devices intended to reduce energy consumption,or to perform useful function such as preheating a fluid.In simple terms,an economizer is a heat exchanger.
· In a steam boiler ,it is a heat exchanger device that heats up fluids or recovers residual heat from the combustion product i.e. flue gase in thermal power plant before being released through the chimney.
· Flue gases are the combustion exhaust gases produced at power plants consist of mosly nitrogen,carbon dioxide,water vapor,soot carbon monoxide etc.
· Hence,the economiser in thermal power plants,is used to economise the process of electrical power generation,as the name of the device is suggestive of.
· The recovered heat is in turn used to preheat the boiler feed water,that will eventually be converted to super-heated steam.
· Thus,saving on fuel consumption and economising the process to a large extent, as we are essentially gathering the waste heat and applying it to,where it is required.
· Nowadasys however,in addition to that,the heat available in the exhaust flue gases can be economically recovered using air preheater which are essential in all pulverized coal fired boiler.
Technical specifications
 

Material Structure
Consists of a serious of spiral fin tubes, the headers of inlet and outlet, bend, frame and other auxiliaries.
Structure Arrangement
In line / staggered arrangement.
 
Working Pribciple of Economizer

1.As shown in the figure above,the flue gases coming out of the steam boiler furnace carry a lot of heat.
2.Function of economiser in thermal power plant is to recover some of the heat from the heat carried away in the flue gases up the chimney and utilize for heating the feed water to the boiler.
3.It is simply a heat exchager with hot flue gas on shell side and water on tube side with exxtended heating suface like Fins or Gills
 
Economisers in thermal power plant

Economisers must be sized for the volume and temperature of flue gas,the maximum prssure drop passed the stack,what kind of fuel is used in the boiler and how much energy needs to be recovered.
When the water is boiled in steam boiler,the steam is produced which is then super-heated after which it is passed to the turbines.
Then the exhausted steam from turbine blades,is passed through steam condenser of turbine in which the steam is condensed and this condensed water then is pre warmed first in feed water heater then in it before re-feeding in boiler.
It is placed in the passage of flue gases in between the exit from the boiler and the entry to the chimney.
In this a large number of small diameter thin walled tubes are placed between two headers.
The flue gases flow outside the tubes usually in counter flow.
Parameters
 

*Note:HD BOILER can bespoke special type of economizer according to customer's requirement.
 
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