Overview of Three in One Filter Washing and Drying Machine Equipment

The three in one filtration, washing, and drying process involves the sequential completion of stirring, reaction, filtration, cleaning, dehydration, and drying (with the ability for secondary pulping) in a sealed container. Widely used in industries such as pharmaceuticals, chemicals, food, dyes, etc., it is particularly suitable for production occasions with high cleanliness requirements, small batch production of multiple varieties, and large batch production.

The three in one filtration washing and drying machine is equipped with a hollow screw belt mixing and equipment jacket, both of which are drying heat medium circulation systems, ensuring that the material receives a large amount of heat energy. Combined with a no dead angle flipping structure, it greatly improves the material's heat exchange capacity, resulting in a drying efficiency 1-2 times higher than traditional processes.

Three in one filtration, washing and drying structure and principle

The filtration washing and drying machine (commonly known as the "three in one" in the industry) can achieve continuous processes such as material filtration, washing, drying, sterilization, and unloading. Its operation method belongs to batch operation (intermittent operation) and is widely used in the fields of pharmaceuticals, food, pesticides, chemical engineering, etc. The filtration washing and drying machine is mainly composed of a vertical tank body with a pressure bearing part, a heating system, a stirring system (stirring shaft, stirring blade, mechanical seal, etc.), a stirring lifting mechanism, a transmission mechanism, a filtering medium, a discharge valve, a spraying device, a sterilization device, a hydraulic pump station, a main electrical control cabinet (including frequency converter, PLC) and other components, realizing the integration of machine, electricity and instrument.

After the basic operation processes of filtering, washing, drying, and solid unloading of a batch of materials are completed, the filtering, washing, and drying machine can also use solvents to dissolve the materials that need further processing, and continue with the next operation process.

Three in one filtration, washing, and drying process flow

1. Filtering

Pour the solid-liquid mixture slurry generated by the upstream reaction kettle or crystallization equipment into the tank of the three in one equipment, and use pressure difference as a driving force to achieve filtration and separation of the solid-liquid mixture. In practical applications, there are methods such as pressure filtration, vacuum filtration, and a combination of pressure and vacuum filtration. Pressure filtration uses clean compressed air, nitrogen or other inert gases, and the specific compressed gas should be selected according to the characteristics of the solid-liquid mixture. For example, if solid-liquid mixtures are prone to oxidation or contain explosive media, compressed air should not be used and inert gases should be used instead. Based on practical experience, the pharmaceutical industry generally requires a filtration pressure of 0.2-0.3MPa to achieve filtration, while some products in the chemical or food industries require higher filtration pressures, with some reaching up to 1.0MPa.

2. Washing

After the filtration process is completed, the next step of the process operation is washing. The three in one equipment tank is equipped with a specially designed spray device, which can evenly distribute the cleaning (washing) solution inside the tank. By opening the stirring system, stirring lifting mechanism, and transmission mechanism, the blade can rotate and move up and down axially, allowing the material to be thoroughly washed and removing impurities adhering to the surface of the grains. The detergent and washing frequency used for washing should be determined according to the characteristics of the material and production process.

3. Dry

The drying process of the three in one equipment can use hot air drying or vacuum drying. When using hot air drying or vacuum drying, clean inert gas must be used because dust will be generated during the drying process, and the operating environment of the equipment should be considered to be explosion-proof. At present, the mainstream drying process for three in one equipment is vacuum drying. The main factors affecting the vacuum drying process are vacuum degree, drying time, stirring blade characteristics, etc.

The vacuum drying process uses a vacuum system to extract inert gas from the tank, reducing the number of gas molecules and isolating air. It is mainly suitable for materials that are prone to oxidation and deterioration, as well as for evaporating materials that require solvent recovery and heat sensitive materials. Under vacuum conditions, it can reduce the chance of material contamination or inhibit the growth of certain bacteria, making it particularly suitable for drying sterile materials.

Performance characteristics of flat plate filtration, washing and drying three in one

1. System sealing: The three in one filtration, washing, and drying system is a fully sealed system that can prevent toxic substances from polluting the air and reduce the occurrence of poisoning accidents among operators during production operations in a sealed system.

2. Recycling: Materials and solvents are almost completely recovered, avoiding waste caused by material omission and solvent evaporation, which has great economic benefits.

3. Multi functional integrated operation: filtering, washing, and drying are completed in the same device. The container wall is equipped with a heating jacket to enable drying treatment.

4. Continuous operation: Filtering and drying are carried out in a continuous system without the need to process wet filter cake. The dried product can be mechanically transported to weighing, packaging and other sections.

5. Save manpower: A non-technical personnel with simple training can complete the operation. Opening, closing, automatic feeding, and automatic discharging do not require technical personnel to monitor.

6. Thoroughly cleaned: The three in one filtration, washing, and drying system has the functions of automatic spraying and stirring. The filter cake can be thoroughly cleaned, thereby reducing the amount of wastewater discharged and lowering the cost of wastewater treatment.

7. Clean production: The multifunctional filtration and drying system is equipped with a dust collector to collect the dust generated after drying, which can meet the requirements of clean production.