Hydrogen sulfide synthesis reactor, hydrogen sulfide manufacturing device and sodium hydrosulfide manufacturing device

The utility model discloses a hydrogen sulfide synthesis reactor, which is used for enabling sulfur and hydrogen to be subjected to gas-phase reaction without catalysts so as to synthesize hydrogen sulfide. The hydrogen sulfide synthesis reactor is characterized by comprising a reactor main body, a heating part, a hydrogen supply part and a heat exchange part, wherein liquid sulfur is accommodated in the lower part of the reactor main body; part of the liquid sulfur is gasified by the heating part; the hydrogen supply part supplies hydrogen to the liquid sulfur; and the heat exchange part is arranged in the gas-phase reaction area above the liquid level of the liquid sulfur in the reactor main body, and is formed in the mode that through changing exchanged heat in per unit volume of the gas-phase reaction area away from the liquid level and exchanged heat in per unit volume of the gas-phase reaction area near the liquid level, the reaction temperatures of the gas-phase reaction areas are within a preset tempe