Heat exchange unit adopting double-circulating-pump, double-plate-exchange and double-water-replenishing system

The utility model discloses a heat exchange unit adopting double circulating pumps, double plate heat exchangers and double water replenishing systems, and belongs to the technical field of heat exchange units. The technical problem to be solved is to provide an improvement of a heat exchange unit hardware structure adopting a double-circulating-pump, double-plate-exchange and double-water-replenishing system. According to the technical scheme, the system comprises an electric control cabinet, a plate heat exchanger, a primary network system, a secondary network system and a water supplementing system. The electric control cabinet is connected with a water pump, a pressure transmitter, a temperature transmitter, an electric adjusting valve, an electromagnetic valve, a heat meter and a flow meter through wires. The on-site water supplementing pipeline is preferentially used, the primary network supplementing secondary network pipeline is started when on-site water supplementing is insufficient, the double wate