Ammonia decomposition reactor having function of preheating ammonia gas

An ammonia decomposition reactor having a function of preheating ammonia gas, comprising a heat exchanger body (1) and a reactor body (2) enveloped externally by the heat exchanger body (1);

• wherein the heat exchanger body (1) comprises a heat-exchange shell (11), a heat-exchange tube (12), an ammonia gas heat-exchange inlet (13), an ammonia gas heat-exchange outlet (14), a heat medium inlet (15) and a heat medium outlet (16), wherein the heat-exchange tube (12) is provided in the heat-exchange shell (11), one end thereof is in communication with the ammonia gas heat-exchange inlet (13), and an other end thereof is in communication with the ammonia gas heat-exchange outlet (14), and the heat medium inlet (15) and the heat medium outlet (16) are individually connected to the heat-exchange shell;
• the reactor body (2) comprises a reaction shell (21), a catalyst tube (22), an ammonia gas inlet (23), and an ammonia-gas-decomposition-gas outlet (24), wherein the catalyst tube (22) is provided in the reaction shell (21), the ammonia gas heat-exchange outlet (14) is in communication with the ammonia gas inlet (23), the ammonia gas inlet (23) is in communication with the ammonia-gas-decomposition-gas outlet (24) by the catalyst tube (22), and the ammonia-gas-decomposition-gas outlet (24) is in communication with the heat medium inlet (15).