Waste mercury iodide reagent recovery method

The invention relates to a waste mercury iodide reagent recovery method. The waste mercury iodide reagent recovery method is technically characterized by comprising the following steps of 1, adding gelatin and a hot water solution of waste mercury iodide into a reaction container, and stirring until the gelatin is completely dissolved; continuously adding formaldehyde and a sodium hydroxide solution into the reaction container, and fully stirring; 2, reacting at 70-90 DEG C for 2-3 hours, and naturally cooling to room temperature; 3, sequentially filtering and recovering separated sodium formate crystals, and separating reduced elemental mercury; and 4, discharging mercury-containing waste gas into the atmosphere after the standard is reached through condensation and adsorption. The problems of the complex process, high cost and the like of an existing mercury removal method are fundamentally solved. 一种废碘化汞试剂回收方法，其技术要点是，包括以下步骤：步骤1，向反应容器内加入明胶和废碘化汞的热水溶液，搅拌至明胶完全溶解；继续向反应容器内加入甲醛和氢氧化钠溶液，充分搅拌；步骤2，70~90℃反应2~3h，自然冷却至室