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Electrial Water Economizer Tubes CFB Boiler Economizer In Thermal Power Plant High Corrosion
Quick Details Specifications
The boiler economizer is an indispensable mechanical device for
coal fired boilers, and is located at the boiler flue, where heat
is captured from the flue gas in order to pre-heat cold water inlet
or heat the boiler feed water. Our economizers are generally made
of 20 low and medium pressure boiler pipes, 20G seamless steel
tubes or ASME grade steel tubes. It reduces the flue gas
temperature and maximizes the heat recovery to help customers
reduce fuel costs. When entering the steam drum, the temperature of
the feed water is increased after it has been heated using the
economizer. The thermal stress caused by the temperature difference
between the steam drum wall and the feed water is reduced, which
reduces the shrink and swell in the steam drum. Our economizer is
an excellent, less expensive replacement for high temperature
boiler water wall tubing, thus reducing manufacturing costs for
coal fired boilers.
Competitive Advantage
Economizers must be sized for the volume of flue gas, its temperature, the maximum pressure drop allowed through the stack, what kind of fuel is used in the boiler, and how much energy needs to be recovered. Economizers designed for natural gas only, would likely plug-up if installed on a coal boiler and would face increased risk of corrosion if installed on an oil-fired boiler. Some units are designed to keep the flue gases above condensation temperature, and others are made of materials that resist the corrosive effect of condensed flue gases.
Parameters
Description | Boiler economizer |
Material | Alloy steel, Carbon steel, SA210C ,SA213T22, etc. |
Material standard | ASTM, EN or ISO etc. |
Dimension | Customization |
Weight | Min: 10 ton Max.:1000 ton |
Smelting Process: | EF+LF + VD |
Process | Material→Ingot → Hot/Cold-Rolling→ Heat treatment (Normalizing+ tempering) → Inspection →rough machining→UT →2nd Heat treatment →finishing machining →Inspection |
UT standard | ASTM A388 or EN10228, etc |
*Note:HD BOILER can bespoke special type of economizer according to customer's requirement.
Internal heat exchangers
1.Subcooling may also be produced by superheating the gas leaving the evaporator and heading to the gas compressor.
2.These systems withdraw heat from the liquid line but heat up the gas compressors suction.
3.This is a very common solution to insure that gas reaches the compressor and liquid reaches the valve.
4.It also allows maximum heat exchanger use as minimizes the portion of the heat exchangers used to change the temperature of the fluid,and maximizeds the volume in which the refrigerant changes its phase.