1 results about "Potassium bisulfite" patented technology

The application belongs to the technical field of potassium sulfite preparation, and discloses a potassium sulfite preparation system and a preparation method. The preparation system comprises: an absorber, which is used for forming an absorption solution containing potassium bisulfite by controlling the pH of a solution to be less than or equal to 6 through a potassium hydroxide absorption method; an oxygen removal device, whose inlet is connected with the outlet of the absorber; a regulating tank, which is connected with the outlet of the oxygen removal device, is used for supplementing potassium hydroxide and controlling the pH of a solution to be greater than or equal to 8, and obtains a potassium sulfite solution through a reaction; an evaporation crystallizer, whose inlet is connected with the outlet of the regulating tank; a solid-liquid separator, whose inlet is connected with the outlet of the evaporation crystallizer, is used for separating a slurry after crystallization into potassium sulfite solids and a crystallization mother liquor; and a dryer, which is used for drying the potassium sulfite solids to obtain a potassium sulfite product. The application can solve the problems of the influence of carbon dioxide on the quality of the potassium sulfite product and the oxidation of the potassium sulfite, and can improve the purity of the potassium sulfite product.