Production process of polyferric sulfate
at present Production process of polyferric sulfate It is mainly divided into two types, one is one-step method, the other is two-step method. As the name implies, one-step production process is to directly produce polymerized ferric sulfate in one step, and the two-step process requires two steps.
The effective content of PFS produced by one-step process is unstable, and the effect of basicity is poor. The polymerized ferric sulfate produced by two-step process has high total iron content, stable basicity and good flocculation effect. Therefore, Zhengyuan began to use two-step production process to produce PFS several years ago. The following is the current production process of Zhengyuan factory:
First, raw materials: sulfuric acid (generally about 97% high concentration), ferrous sulfate (ferrous heptahydrate) and water are added into the reaction tank according to a certain proportion to produce mixed liquid
2. Connect the reacted liquid product into the reactor. Using oxygen, sodium nitrite and other oxidants as catalysts, the reaction was completed until the ferrous ion in the solution was completely oxidized
3. The liquid product with good reaction will be sent into the finished product tank
4. The liquid product passes into the spray tower from the finished product pool, and is ejected by the high-pressure nozzle. The high-temperature hot air heated by the hot-air stove is blown into the tower, and the fog like polymerized ferric sulfate is quickly dried in the air to produce solid products
5. The spray solid product is sealed by the material receiving port and bagged. So far, all production processes have been completed.
The above two steps are adopted in Henan Province Polymerization process of ferric sulfate The technical staff can not understand the source of the water!