Refining of crude phosphorus

The refining of crude phosphorus is mainly achieved through methods such as condensation in yellow phosphorus furnaces and wet refining. For the condensation of phosphorus in the flue gases from the yellow phosphorus electric furnace process, the following methods can be employed: 1. Improve the cooling equipment: Choose more efficient flue gas coolers, such as water-jet cooling towers or heat pipe exchangers. 2. Increase the condensation time: Extending the residence time of flue gas in the cooling equipment facilitates the condensation and precipitation of phosphorus. 3. Increase cooling intensity: Raise the flow rate of the cooling water or change the method of injecting it, thereby increasing the cooling intensity and making it easier for phosphorus to condense. 4. Optimize operating conditions: By adjusting parameters such as furnace temperature and pressure, phosphorus in the flue gas can be condensed at lower temperatures, thereby improving the condensation efficiency. 5. Flue gas recirculation technology: This involves returning a portion of the flue gas that has not been condensed back to the electric furnace, where it undergoes pyrolysis and condensation once again, thereby increasing the phosphorus recovery rate. These are some common methods for improving the efficiency of phosphorus condensation, but specific optimizations and adjustments are still required based on the actual process conditions and equipment. .