Gas coolers
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ECO-F type - cooler |
The principle of operation
The principle of operation of the coolers is based on the transfer of heat from heated gases to the cooling agent. The heat is transferred by means of forced convection through the heat exchanger pipe walls to the cooling medium. The cooling medium flows inside the cooling pipes, while the cooled gases are outside the pipes. The cooled gases flow perpendicularly to the cooling agent flow. The cooling medium may be either gas (atmospheric air) or liquid. The cooling air is forced to the heat exchange pipes by means of axial-flow or centrifugal fans.
If the dust concentration in the cooled gases is high, the cooler may serve a primary cleaning chamber, after the flow speed has been reduced. In the case of cooling flue gas with dust which tends to adhere to the pipe surface, a chain cleaning system is used to prevent formation of a dust layer on the cooling pipe surface.
Flat tube heat exchanger
Design
A typical cooler is made of the following elements:
- steel enclosure (the type of the material used depends on the temperatures),
- heat exchange elements (flat cooling tubes for gas/gas heat exchangers, plates for gas/liquid exchangers),
- In-built inspection manhole door for convenient maintenance and potential replacement of spare elements,
- cooling fans for gas/gas heat exchangers,
- Heat exchange elements chain cleaning system (an elevated cap, in which the cleaning system drive is situated, is installed above the heat exchange elements),
- charging hopper,
- dust reception device (worm conveyor + rotary valve),
- support structure,
- service platforms,
- control and automation system.
Upon customer request, ECO INSTAL may produce coolers made of stainless steel.
