Gas-liquid direct heat exchanging type gypsum normal pressure reaction vessel

The utility model relates to a gas-liquid direct heat exchanging type gypsum normal pressure reaction vessel which comprises a reaction vessel body and a vessel body upper cover. The reaction vessel is characterized in that an agitating shaft with an agitating blade is arranged in the center of the reaction vessel body; the agitating shaft is connected with a speed reducer and a speed adjustment agitating motor; the speed reducer and the speed adjustment agitating motor are fixed on the vessel body upper cover; a water steam distributor is arranged at the lower part of the reaction vessel body; and water steam for heating slurry enters the reaction vessel body through the water steam distributor connected with a water steam inlet. The gas-liquid direct heat exchanging type gypsum normal pressure reaction vessel is used as a special device for producing high-strength alpha type semi-hydrated gypsums by using industrial waste residues-desulfurized gypsums and can provide good reaction temperature conditions for