The working principle and technological process of the three-in-one cylinder-cone filter, washing and drying

2023/04/13

Filtration washing and drying machine (commonly known as "three-in-one" in the industry) can realize continuous processes such as filtration, washing, drying, sterilization, and unloading of materials. Its operation mode belongs to batch operation (intermittent operation), and is widely used in pharmaceuticals. , food, pesticide, chemical and other fields, can avoid material loss, pollution and environmental pollution that may be caused during the transfer of materials. The existing three-in-one structure is a flat plate type, but some defects have been found in long-term production and use, such as: the circular flat bottom filter area is small; the side discharge leads to incomplete discharge; the drying effect is not ideal, and the material is turned during the drying process Small, low heat transfer efficiency, limited drying effect, etc.

In order to overcome the problems and deficiencies in the combination of the above-mentioned unit equipment, and at the same time meet the transformation of the chemical industry to high-quality, high-value-added, multi-variety, and small-batch, Wuxi ZhangHua Machinery Co., Ltd. has carried out a lot of design and development work, and finally successfully developed it. The multi-functional cylinder-cone reaction filter dryer integrating filtration, washing and drying has successfully applied for a patent (patent number: ZL201721560677.6.), which has achieved a major improvement in the technical performance of the equipment, from structural design to application. Comply with the corresponding regulatory requirements of the pharmaceutical industry.

The equipment has three main functions of filtering, washing and drying, and also has many functions such as reaction, extraction, crystallization, concentration, evaporation, mixing and crushing, which belongs to the improved multifunctional equipment.

Multifunctional cylinder cone reaction filter washing and drying machine working principle
The new filter washing and drying machine has a barrel-cone structure. There are heating jackets on the cylinder body and the lower cone body to heat or cool the materials. There are hollow shafts and variable-angle variable-lead hollow shafts inside the multi-function machine. The spiral stirring device stirs, stirs and lifts the material, and pushes out the material when discharging. A conical filtering device with a relatively complex structure is installed in the lower cone, and a specially designed non-dead angle quick-opening discharge device or a non-dead angle pneumatic discharge ball valve is installed at the bottom of the equipment.


In the reaction stage, the reaction materials are added from the top, and the unique stirring structure can make the materials be stirred evenly in the machine, and the materials are heated or cooled simultaneously through the cylinder jacket, cone jacket, hollow shaft, and hollow spiral blade. Make the material fully react in the machine. In the filtration stage, the machine can filter and dry the material in the machine by pressurizing or vacuuming, and add washing liquid, so that the material can be automatically repulped and washed several times in the machine, and then pressed dry after meeting the washing requirements. In the drying stage, the cylinder jacket, cone jacket, hollow shaft, and hollow ribbon heat the material at the same time and vacuumize the top, vacuum-tight and low-temperature drying of the material, and automatically seal and discharge the material after drying.



Multi-functional barrel-cone reaction filter washing and drying machine process flow
1. Stirring reaction
Add the material (solid-liquid, liquid-liquid or gas-liquid) that needs to be reacted from the feeding port on the top of the equipment, start the motor and reducer, and make the hollow shaft and the hollow ribbon rotate clockwise (looking down from the top). The unique stirring structure can make the materials fully stirred and fully reacted in the machine. If the materials are to be heated or cooled during the reaction, heat medium or refrigerant can be introduced into the cylinder and the cone jacket, as well as the hollow shaft and the hollow spiral belt. The heating or cooling medium can be continuously circulated to complete the heating or cooling of the material to meet the process conditions required for the reaction.



2. Pressure filtration or vacuum filtration
After the reaction is over, open the outlet of the lower filtrate, pass compressed air or nitrogen gas into the equipment, and filter the reacted solid-liquid mixture under pressure until the materials in the machine are dried. Vacuum can also be drawn at the outlet of the filtrate to vacuum filter the material until the filtrate is drained. When filtering, the hollow shaft and the hollow screw belt can be rotated clockwise (viewed from the top) to lift the material, and the hollow screw belt can limit the thickness of the filter cake layer when rotating, so that the material is in a thin filter cake Filter under layer conditions to increase the filtration rate.

For materials that are easy to filter, it is not necessary to stir when filtering, and the materials are directly filtered to dryness.

3. Can be washed and filtered many times
?? After some materials are filtered, they need to be washed many times. The reaction, filtration and drying multifunctional machine is an ideal equipment for repeated washing of materials.

After the material is dried in the machine, the washing liquid can be added to the top washing liquid inlet, Then, through the stirring of the hollow shaft and the hollow ribbon, the filter cake is evenly repulped, and the repulp is stirred evenly before the material is pressed dry. If washing once is not enough, it can be washed several times. At this time, the above steps can be repeated many times. The operation is very convenient and the labor intensity is extremely low.
??The material is washed by the above method, we call it intermittent washing method.

Since the material is pressed dry and then washed with washing liquid, although the valves are opened and closed a little more times during operation, less washing liquid is used. The machine can also continuously wash the materials, that is, continuously press the washing liquid with a pump or other methods, and use the pressure of the washing liquid to filter, while the hollow shaft and the hollow ribbon are continuously stirred, and the filtrate is continuously discharged from the filtrate outlet until Until the washing requirements are met, the filter cake is finally pressed dry. This continuous washing method generally uses more washing liquid than intermittent washing, but it is more convenient to operate.



4. Vacuum drying and discharging
The filter cake that is filtered or washed, filtered and dried remains in the machine. At this time, the heat medium is passed into the cylinder jacket, cone jacket, hollow shaft, and hollow screw belt to heat the material. At the same time, the hollow shaft and hollow screw The belt still rotates in a clockwise direction (looking down from the top) to lift the material up and stir it fully, while vacuuming is carried out on the top of the equipment to make the material dry in a vacuum-tight manner inside the machine. Since the hollow shaft and the hollow ribbon are heated from the inside in addition to the jacket heating, and the drying is carried out under vacuum conditions, the drying efficiency is very high.
??After drying, open the quick-open discharge port at the lower part of the equipment, so that the hollow shaft and hollow ribbon rotate counterclockwise (viewed from the top), and the dried materials in the machine will be automatically pushed to the discharge port.

So far, the reaction, filtration, washing and drying processes of a batch of materials are completed.

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