Red painted ND or Carbon Steel exported Thailand economizer HRSG
heat recovery steam generator boiler
1. Economiser performs a key function in providing high overall
boiler thermal efficiency by recovering the low level energy from
the flue gas before it is exhausted to the atmosphere.
2. Economiser recovers the energy by heating the boiler feedwater.
3. Economiser are basically tubular heat transfer surfaces used to
preheat boiler feed water before it enters the steam drum or
4. Economiser reduces operating costs or economise on fuel by
recovering extra energy from the flue gas.
5. Boiler economizers are heat exchange devices with finned tubes
that heat a liquid, sometimes water, up to however sometimes
doesn't exceed the boiling purpose of liquid.
6. We can manufacture three types of boiler economizer, bare tube
economzier, H finned tube economzier and spiral finned tube
1. Economisers also reduce the potential of thermal shock and
strong water temperature fluctuations as the feed water enters the
drum or waterwalls.
2. Increasingly stringent environmental regulations limiting
nitrogen oxides and sulfur dioxide emission can also affect
3. The gas-side heat transfer coefficient is much less than water
side heat transfer coefficient. To compensate this, outer surface
of the tubes may be finned to increase the surface area of heat
4. The ultimate goal of economizer design is to achieve the
necessary heat transfer at minimum cost.
5. A key design criterion for economizer is maximum allowable flue
gas velocity. Higher velocity provide better heat transfer and
reduce capital cost.
|Fin tube thread pitch||5-30|
|Fin tube length||≤12000|
Material:Carbon Steel,Alloy,Austenitic Steel(Nickel and Chromium or
1. Impact test and Strength calculation report with applied
2. 100%NDT(non-destructive inspection) report of steel plate, tube
3. X-ray, γ-ray and liquid penetrant test inspection report
(welding seam): to ensure the quality of the entire boiler.
4. Hydraulic test report: ensure the standard working pressure and