Brand Name : HD BOILER
Model Number : Furnace wall
Certification : ISO9001 , SGS , TUV , ASME , EN
Place of Origin : ZHANGJIAGANG,CHINA
MOQ : 500 tons
Price : Negotiable
Payment Terms : Western Union, L/C, T/T
Supply Ability : 500tons / Month
Delivery Time : 50 Days
Packaging Details : Iron Frame Package
Function : Steam Boiler
Structure : Tube Heat Exchanger
Material : Stainless steel,aluminum
Connector : Flange or thread or others
Usage : Power Plant/CFB Boiler
Port : Shanghai
Specification : Customized
Condition : New
High Corrosion Fuel Gas Boiler Economizer For Heat Reovery Systems, ASME Standard
|Fin tube thread pitch||5-30|
|Fin tube length||≤12000|
Working principle of a flue-gases cooler is the same as in the
above-described equipment, but the aim in this case is to cool a
primary fluid, not to get a thermal profit by heating a secondary
These equipment are usually installed as the previous step to a flue-gases cleaning, to avoid the gases from reaching the cleaning systems at too high temperatures. This means an alternative to the dilution with air, which would imply an over-sizing of the mentioned systems
Before designing this kind of equipment, it is necessary to know
the nature of the gases to be cooled and their dust content. The
purpose of all that is to design an equipment free of important
fouling which would force to make cleaning works more frequently
We must have in mind as well the availability to detach the dust from the gaseous stream containing it in all those areas where there is a bend or some enlarging in the pass section, which forces to include in the design some systems for dust collection and removal, to allow the correct heat exchange.
1. Absorb the heat of low-temperature flue gas, reduce the smoke discharge temperature, reduce smoke loss, and save fuel.
2. Since the feed water is heated in the economizer before entering the steam drum, the heat absorption of the feed water on the heating surface is reduced, and the economizer can be used to replace part of the evaporation heating surface with higher cost.
3. feed water temperature increased, into the drum will reduce the wall temperature difference, thermal stress corresponding to reduce, extend the service life of the drum.
When the designer's choice is the multi-cyclone collector,or the
electrostatic precipitator,or a different type constructed of
metals or ther low temperature materials,it becomes necessary to
add a gas-cooling device.This is done to assure that he entering
flue gases are with in the temperature range of 600 to 700F,with no
possibility of even flashes of higher temperatures.
The exit temperature depends upon the materials used downstream from the cooling chamber.Since , however , experience and economical evaluations justifying the use of the high temperature alloys are not generally available this paper is based upon the exit temperatures stated above.
The two agents commonly used as cooling materials are air and water.Both have advantages and disadvantages.Generally,a combination of the two is found most acceptable.However,they must first be considered separately,so that the characteristics of each may be properly evaluated.
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High Corrosion Fuel Gas Economizer For Boiler Heat Reovery Systems , ASME Standard Images