The stirrer in the reactor won’t move
Thread Content
In the later stages of concentration in the reaction tank, only a thin layer of material remains at the bottom of the tank, just enough to cover the stirring mechanism; the surface layer of material solidifies and covers the stirrer, preventing it from functioning. The material below takes on a paste-like consistency. The process requirements dictate that it must be completely dried. Have any of you encountered similar problems? Do you have any good solutions?
This issue should be resolved by contacting the equipment manufacturer or designer. It is worth considering whether it is feasible to reduce the materials, depending on whether it complies with the design requirements, for reference only.
Has a flow field analysis been done for the mixing?
What is the melting or softening point of the material? The heating temperature must be above this value. It’s similar to what happens in our resin production; this situation occurs when the steam temperature is low.
Double-layer stirring: break up the material as long as it hasn’t formed a thick layer on top; give it a try
If only concentration is carried out, the mixing method is improved, and the temperature is controlled above the melting point of the material； If solvent replacement is continued after concentration, new solvents can be added in multiple batches to ensure that the solvent used before concentration meets the required standards while maintaining fluidization ； If additional raw materials are to be added later for further synthesis, feeding experiments can be conducted, with the materials proceeding through the subsequent processing steps in the same reactor. There are many methods, and an appropriate plan should be developed based on the specific process.
Thank you for your advice. We must completely evaporate the existing solvent, as it causes severe dissolution of the materials.
I have encountered the process of evaporating the solvent; after that, I switch to another solvent to carry out cooling and crystallization.
This post was last edited by Free Wing FC on 2021-11-24 at 22:39. Consider using scrapers, and consult with process designers and equipment manufacturers
Replace the evaporation equipment; vacuum scraper evaporation could be considered
Hello, I am Peng Liang from Nanjing Zhengyuan Group. Regarding the question you raised. May I ask: What is the main material of this medium? Currently, is the reactor lined with enamel or made of metal? What type of materials are used in the reactions? What temperature is required for the reactor vessel, what is the temperature of the jacket, and what is the pressure in the reactor vessel’s jacket? Personally, I suggest: improving the mixing method, and also considering whether to replace the mixing system. We have a total of over 1,400 employees with strong technical capabilities; if needed, you can contact me at V19163339015.