The operation principal of Clayton heat recovery boiler is same as that of Clayton steam generator which is world famous. This exhaust gas boiler is therefore the most efficient, compact, responsive and safest means of producing high quality steam or hot water from waste gas streams.

Working Principle

The Clayton Heat recovery boiler operates on the principle of the forced circulation of water through the helical coil. The boiler is installed in the waste gas heat source and feed water is pumped through the coil in the opposite direction from the heating gasses by means of the specially designed Clayton Pump.
The steam/water mixture from the outlet of the coil is then directed to the high efficiency Clayton centrifugal separator where high quality steam flows from the outlet. The separated water is recycled back to the hot well. A feature of all Clayton systems is that dew point corrosion is prevented due to the preheated feed water.
Several Clayton Heat recovery boilers can be connected together to operate simultaneously under automatic controls and many Clayton system designs have been developed to suit different industry and process applications.


The Clayton Heat recovery boiler is of a simple modular construction which allows optimum heat transfer.
A range of standard coil sections have been developed to suit a wide variety of process conditions. The sections are chosen for optimum performance by computer program, based on the heat available, the steam output required and the allowable pressure drop.
Because of the modular construction of the Clayton Heat recovery boiler assembly is a straightforward procedure. The standard coil sections are connected together by flanges or encased in a welded outer shell. Coned transition pieces are then added at each end for connecting to the exhaust ducting. The water connections between each coil are usually located on the outside of the boiler shell.


– Low weight

– Quality steam

– Rapid response

– Safety

– Low maintenance

– High efficiency

– Small size

– Unattended operation

– Low blowdown

– Fully automatic


The Clayton Heat recovery boiler can produce steam using the heat in the waste gases from diesel engines, small gas turbines, enamel ovens, stress relieving ovens and other suitable applications including high temperature processes such as heat from thermal oxidizers.

On land and marine installations the Clayton Heat recovery boiler has been used extensively for over 40 years to recover heat from the exhaust of propulsion and power generating diesel, gas and heavy fuel oil engines. Engines on electrical generators of sizes up to 15 MW are ideal for heat recovery using the Clayton Heat recovery boiler.

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