PLATE HEAT EXCHANGER AND HEAT EXCHANGER PLANT

摘要

The invention refers to a heat exchanger plant and a plate heat exchanger. The plate heat exchanger comprises a plate package (11) having heat exchanger plates provided beside each other for forming first plate interspaces for a first medium to be evaporated and second plate interspaces for a second medium in an alternating order in the plate package. Each heat exchanger plate comprises four portholes forming a first inlet port, which communicates with the first plate interspaces for supply of the first medium, a first outlet port, which communicates with the first plate interspaces for discharge of the first medium, a second inlet port, which communicates with the second plate interspaces for supply of the second medium, and a second outlet port, which communicates with the second plate interspaces for discharge of the second medium. The plate package comprises a drainage port (45), which communicates with the first plate interspaces and is closed in relation to the second plate interspaces. The drainage port permits discharge of a fluid collected in the first plate interspaces.