Water removal system and water removal method of device for producing isocyanate by phosgenation

The invention discloses a water removal system and a water removal method of a device for producing isocyanate by phosgenation. In the initial operation stage of the device for producing isocyanate byphosgenation, a solvent is used in the water removal system to dissolve residual water in the system in the solvent, the solvent is recycled and utilized, and the water is concentrated and discharged. By adopting the technology, the water in the system can be effectively reduced, the corrosion to the equipment in an acidic environment formed by the water after the feeding is reduced, and the sidereaction between the water and the isocyanate product is reduced. At the same time, energy consumption in the process of water removal is effectively reduced and the time of solvent operation and water removal is shortened. The water removal system and the water removal method have the advantages of simple process, convenient operation, high efficiency and energy saving. 本发明公开一种光气化生产异氰酸酯装置的除水系统和除水方法。通过在光气化生产异氰酸酯装置开车初期，使用溶