Reaction kettle for producing cyanamide and method for producing cyanamide by using same

The invention relates to a reaction kettle for producing cyanamide. The reaction kettle comprises a kettle body and a kettle cover fixed at the top end of the kettle body, and a stirring mechanism isarranged in the kettle body. The reaction kettle is characterized in that a first cooling medium heat exchange pipe is arranged in the kettle body, a liquid carbon dioxide gasification pipe is arranged below the first cooling medium heat exchange pipe, and the first cooling medium heat exchange pipe and the liquid carbon dioxide gasification pipe are both of a coiled pipe type structure. The inletend of the liquid carbon dioxide gasification pipe is connected with a liquid carbon dioxide inlet; the outlet end of the liquid carbon dioxide gasification pipe is connected with a gas carbon dioxide outlet, the gas carbon dioxide outlet is connected with a gas carbon dioxide inlet through a connecting pipe, the gas carbon dioxide inlet is connected with a gas carbon dioxide conduit extending into the bottom of the kettle body, and the gas outlet of the gas carbon dioxide conduit is located at the bottom in the kettle body. Liquid carbon dioxide is gasified without additional heating, so that energy consumption is reduced, and meanwhile, the consumption of circulating cooling water is reduced.