A transfer pipe and a return pipe are arranged along the boom assembly.

Seals are provided for sealing the passage of the transfer pipe (P1, P2) through the openings.

Each zone (1) is provided with a heat exchanger (2) connected to the heat carrier line and each zone (1) is connected to the drying medium line (5).

A flex fuel sensor is deployed in conjunction with the fuel transfer line (e.g. around a plastic fuel line) or at the bottom/side of a fuel tank.

Dryer is comprised of zones (1) formed in the drying space through each of which passes a line for drying medium (5) and a line for heat carrier (13) both being formed as separate closed circuits connected to each other by an air cooler.

Reactant(s) to be added during the reaction are kept in a header barrel (202), which has a plunger (402) to feed reactant(s) from the header barrel (202) through a transfer line (302) into the reactor vessel (102).