Refining waste heat recycling system and recycling method

The invention discloses a refining waste heat recycling system and recycling method. The refining waste heat recycling system comprises a hot water system and two cold water systems. According to thehot water system, low-temperature hot water pipelines returned by a production device and a public project communicate with an outlet pipeline of a first refrigerating unit (1); the outlet pipeline ofthe first refrigerating unit (1) communicates with a water-water heat exchanger (5); the water-water heat exchanger (5) communicates with the production device; and a high-temperature pipeline of theproduction device is connected with the first refrigerating unit (1), a second refrigerating unit (2), a low-temperature user and the public project through pipelines correspondingly. According to the system, by means of the manner of low-grade waste heat recycling, absorption refrigeration and recycling, the aims of energy conservation and emission reduction are achieved, and a very good way isprovided for continuous and