HeatMatrix Group

- Air Pre-Heater (APH)

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The HeatMatrix air preheater consists of multiple corrosion resistant tube bundles contained in a metal shell or housing. The proprietary polymer bundle design consists of multiple tubes that are connected to each other over almost the full length of the tube. This structure creates a strong rigid matrix grid that is able to resist high gas velocities and thermo shocks. The supporting connector between the individual tubes creates simultaneously a counter current flow configuration between the two fluids. This configuration improves the heat transfer by 20% compared to cross flow type exchangers.

The inlets and outlets of the exchanger are located at the side of the heat exchanger in order to allow easy access to the polymer tube bundles. These lightweight bundles are retractable from the top and can be cleaned or replaced without demounting the complete exchanger. In the case of fouling flue gas each bundle can be equipped with a spraying nozzle, which thoroughly cleans each bundle in an alternating cleaning sequence during operation.

The capacity of the air preheater is fully scalable by placing multiple polymer bundles in a shell. The smaller size exchangers have a cylindrical shape and the larger size air preheaters have a boxed shape to accommodate flue gas flows up to 500,000 kg/hr.

The polymers applied for the HeatMatrix exchanger have a design temperature of 200°C. For applications with higher flue gas temperatures an integrated design between a metal and a polymer part is offered (see below).

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