Hydrogen chloride synthesis furnace byproduct hot water energy recovery system

The utility model discloses an energy recovery system for byproduct hot water of a hydrogen chloride synthesis furnace. The energy recovery system comprises a synthesis furnace, a synthesis furnace hot water tank, a lithium bromide unit, a heat supply network assembly, a first heat exchanger, a primary brine distribution barrel, a second heat exchanger, a salt dissolving barrel, a preprocessor, afilter, a resin tower, a refined brine storage tank and an electrolytic bath, and a water outlet of the synthesis furnace is respectively communicated with a water inlet of the lithium bromide unit and a heat medium inlet of the first heat exchanger through pipelines. The system has the advantages that the byproduct hot water of the synthesis furnace can provide energy for normal operation of thelithium bromide unit, can be used for heating in a factory, can be used for exchanging heat with primary brine in the primary brine distribution barrel, and can also be used for preheating pure waterentering the electrolytic b