Evaporator with improved droplet separation

An evaporator for vaporizing a substance into a gaseous form thereof, wherein the evaporator comprises:

• an outer casing, which comprises a substantially horizontal shell, substantially vertical first and second end plates,
• a suction duct arranged inside the outer casing in a longitudinal direction of the shell, the suction duct having an upper surface and openings formed in the upper surface,
• an inlet connection for leading a substance to be vaporized into the outer casing,
• an outlet connection for leading vaporized substance out from the outer casing, the outlet connection being arranged at one of the first and second end plates of the outer casing,
• a plate pack functioning as an evaporator, which is arranged inside the outer casing, in its lower part,
• an inlet connection and an outlet connection for a heating substance for leading a heating substance into the plate pack and out from it,
• a droplet separator is arranged inside the outer casing above the plate pack, the droplet separator comprising first and second demister parts which are arranged at both sides of and are connected to the suction duct such that the upper surface of the suction duct is positioned above the first and second demister parts, and
• a cover plate arranged above the first and second demister parts of the droplet separator and the suction duct, the cover plate having a length which corresponds with a length of the first and second demister parts and having an elongated cross-direction extending from a lower edge of the first demister part to a lower edge of the second demister part.