The two in one filtration and washing equipment is a multifunctional solid-liquid separation device that integrates filtration, washing, and two main processes into one. This type of equipment is widely used in industries such as pharmaceuticals, chemicals, pesticides, and food to achieve the entire production process from feeding crystalline solid-liquid suspension to automatic discharge after drying of raw materials.
The two in one filtration and washing process includes the following steps:
1. Inert: Before adding materials to the mixing filter or filter dryer, nitrogen is injected into the container to remove the oxygen inside. This step can prevent potential explosive environments from occurring inside the container.
2. Feeding: After purification, inject the filtrate into the container.
3. Filtration: The filtrate is pressurized with nitrogen into the container and extends from below the filter cloth, leaving solids on the filter cloth. The mother liquor flows through the formed filter cake. Operate under vacuum to achieve solid-liquid separation. When filtering, the filter cake is smooth and the solid-liquid separation effect is good.
4. Cleaning: After the filtrate is separated from the filter cake, the cleaning process is initiated. Before displacement washing, use a stirrer to smooth the surface of the filter cake to prevent cracking. Use a cleaning ring with a nozzle to evenly distribute the washing solution on the entire surface of the filter cake. By applying pressure again inside the container, the cleaning solution is washed onto the filter cake to replace the remaining mother liquor, and the filtered mother liquor is discharged using the same method. During the refining process, add the cleaning solution to the container and mix and stir with the material. By applying pressure again inside the container, the cleaning solution is washed onto the filter cake to replace the remaining mother liquor, and the filtered mother liquor is discharged using the same method. There is a 360 ° rotating spray device on the inside of the container to evenly distribute the cleaning (washing) solution inside the container, which can achieve internal cleaning and material paddle washing of the container. The filter cake and washing solution are mixed by lifting and lowering the paddle to thoroughly wash the slurry crystals and filter cake.
5. Drying: After cleaning, the drying process begins. In order to achieve a good drying effect, the vacuum pumping and heating of the filter dryer are carried out simultaneously. During the drying process, constantly stir the material. The filter dryer maintains a vacuum and constant temperature (the allowable temperature of the material) state until the material humidity reaches the required level. The filter cake is scraped layer by layer by the stirring blade, and the equipment heating device uniformly heats the filter cake. Under vacuum, hot gas is used to heat the wet material, accelerating evaporation and achieving the purpose of drying.
6. Cooling: After the drying process is completed, cool the product and discharge it.
7. Unloading: After drying and cooling, the product is unloaded from the unloading valve on the side. The product is sent to the discharge valve by the mixing arm.
8. Cleaning: Use a spray ball to spray cleaning solution onto the product contact surface, and clean the container environment internally during each production batch or product exchange. This step can achieve sufficient and effective cleaning of the interior of the dryer.