Ammonium sulfate mother liquor temperature
Thread Content
Question: The temperature of the ammonium sulfate mother liquor in my workshop is over 40 degrees, which tends to cause clogging in the saturator. What temperature is suitable?
The relationship between the precipitation of ammonium sulfide and temperature is not particularly strong; the main reasons for clogging of the saturator are the slurry concentration and mixing, as well as issues related to the design of the tank
At the bottom of the saturator, the density of ammonium sulfate is higher than that of the slurry, leading to natural sedimentation; high concentrations make it easy for crystals to bridge together and cause blockages. Continuous crystal removal and increased agitation help to resolve this issue. Accumulation of material at the bottom of the tank, sticking, and blockages occur due to inadequate design – structural improvements and anti-sticking measures are needed. If the mixer has dead zones, the flow of the slurry comes to a stop, resulting in clumping
This situation might be due to a blockage in the bottom stirring tube
Based on years of experience, the temperature range for the mother liquor is quite wide, between 45 and 55 degrees Celsius. However, when the temperature exceeds 50 degrees Celsius, the solubility of the crystals increases, making it difficult for the crystals to grow larger. It is generally kept between 45 and 50.
The gas temperature in the preheater is 65–70 degrees, while the temperature of the mother liquor is around 50 degrees. Check if the reflux in the saturator crystallization chamber is blocked