Device for recycling heat energy in production process of electronic grade phosphoric acid

The utility model provides a device for recycling heat energy in the production process of electronic-grade phosphoric acid. The device comprises a phosphorus pentoxide reaction tower, the top of the phosphorus pentoxide reaction tower is provided with an upper seal head jacket and a gas guide tube jacket, the lower part of the phosphorus pentoxide reaction tower is provided with an annular spray gun cooling jacket, the bottom of the phosphorus pentoxide reaction tower is provided with a lower seal head jacket, and the top of the phosphorus pentoxide reaction tower is further connected with a steam pocket; the soft water tank supplies water to the upper seal head jacket, the gas guide tube jacket, the annular spray gun cooling jacket and the lower seal head jacket respectively, and the annular spray gun cooling jacket and the lower seal head jacket return water to the steam pocket; and the upper sealing head jacket and the gas guide pipe jacket return water to the soft water tank. Cooling water at the upper p