Hot-blast stove is a machine supplying hot-blast air. The working process of a dryer machine needs a machine to supply heat source, and this is hot-blast stove. Hot-blast stove is steam dryer machine or airflow dryer to provide direct heat source, so that it plays an important role in the drying industry.

Indirect type hot-blast stove is improved on the basis of direct type hot-blast stove, as some materials are not allowed to be polluted in the drying process or some materials are easy to react with hot air. Then using direct-contact heat source is not advisable, so that indirect type hot-blast stove needs heat exchanger and the bigger the size of the heat exchanger is, the higher the heat transformation efficiency will be.

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