System for cleaning of the plate heat exchanger

A plate type heat exchanger cleaning system is provided to decrease the operation time, to save a maintenance cost and to minimize a work space. A plate type heat exchanger cleaning system comprises: a washing water supply device(610); a storage tank(600) storing the chemicals and the washing water supplied from the washing water supply device; a washing water input device(630) supplying the washing water of the particulate state by mixing the washing water and compressed air; and a washing water out device(640) collecting the washing water ejected from the plate type heat exchanger to the storage tank. The washing water input device has an atomizing nozzle having a washing water inlet port, a compressive air input and a washing water outlet port. The washing water out device and the storage tank are connected through respective pipes(651, 652 and 653) for the forward direction washing.