Filter dryer innovative equipment vertical fixed cylinder conical filter washing and drying three-in-one

2023/04/03

In the post-treatment process of pharmaceuticals, pesticides, explosives, dyes, pigments, and other fine chemical production processes, there are often unit operations such as filtration, washing, and drying. These unit operations are usually composed of unit equipment such as centrifugal filters, washing tanks, and dryers. It operates independently, and the equipment is transported through pipelines or other methods. Multiple units of equipment are connected into a system of large devices, long processes, low efficiency, and difficult to adjust the production process. For suspensions with high solid content, solids often stick to the wall and block the pipeline, making it difficult to carry out normal production. Adopting open production, although it is convenient to deal with the problem of blockage, it is difficult to meet the requirements of GMP regulations for medicine, food, biological products, etc., and there are still potential safety hazards for flammable, explosive, toxic or highly toxic materials.




In order to overcome the problems and deficiencies in the above-mentioned unit equipment combination, 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 Mechanical Engineer finally developed Integrating filtration, washing and drying into one multifunctional vertical fixed cylinder conical filter washing and drying three-in-one. The cylindrical conical filter, washing and drying three-in-one has three main functions of filtration, washing and drying, so it is collectively called filter dryer, commonly known as "three-in-one"; at the same time, it also has the functions of reaction, extraction, crystallization, washing, concentration, evaporation, It has multiple functions such as mixing and crushing, so it is also called a multi-function machine.



Vertical fixed cylinder conical filter washing and drying three-in-one structure and working principle

The upper part of the fixed cylinder conical filter dryer is cylindrical, and the lower part is conical, so it is called cylindrical cone.

Both the upper cylinder and the lower cone have a double-layer jacket structure: the inner jacket is the filtrate channel, and small holes are opened on the inner wall, and the inner wall is followed by filter cloth and filter screen (composite orifice mesh), and the filtrate passes through the filter screen, The filter cloth and the inner wall of the inner jacket first enter the inner jacket, and then flow out through the outlet of the filtrate; the outer jacket is a hot or cold medium channel for heating or cooling. The driving device is installed on the top of the container, and the middle transmission shaft of the equipment is equipped with a spiral scraper, a stirring paddle and a pushing screw. The driving device can be rotated forward or reversed to lift or push down the material.



Specific operation process: feeding, first put the material into the equipment from the top feeding port; filter, open the filtrate outlet, and filter the material by vacuuming the filtrate outlet or applying compressed air on the top of the equipment; washing, suspending filtration, washing Add solvent from the top, wash under stirring, continue to filter after washing; dry, pass heat medium into all the above-mentioned hollow rotating parts and outer jackets, heat the materials, and vacuumize at the top of the equipment at the same time, Vacuum-dry the material; unload, open the quick-opening discharge valve at the lower part, make the driving mechanism rotate in the opposite direction, and the pushing screw will automatically push the dried material out of the machine.



Vertical fixed cylinder conical filter washing and drying three-in-one 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 several times.

The reaction, filtration and drying multifunctional machine is an ideal equipment for repeated washing of materials. After the material is pressed dry in the machine, the washing liquid can be added to the top washing liquid inlet, and then the filter cake is evenly repulped through the stirring of the hollow shaft and the hollow ribbon, and the material is pressed dry after the repulping is evenly stirred. 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.



Washing materials in the above method is called batch 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, and make the hollow shaft and hollow ribbon rotate counterclockwise (looking down 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.

The vertical fixed cylinder conical filter washing and drying three-in-one developed and produced by Wuxi ZhangHua Machinery belongs to high-tech equipment and has the following advantages
1. Closed operation, multiple processes are completed in the same equipment, reducing the impact of dust and microorganisms on material quality, reducing the loss of valuable materials, thereby improving product quality and output.


2. Reduce material transportation links, especially the transportation of filter cakes, shorten the production cycle and increase production capacity.
3. Filtration and washing operations can be carried out under vacuum or pressure, and the process operation is flexible and easy to control.
4. For the treatment of flammable, explosive, poisonous or highly toxic dangerous goods, reduce environmental pollution, improve the working environment and ensure safe operation.


5. Shorten the process, reduce equipment, reduce workshop space, and reduce project investment.

Vertical fixed cylinder conical filter washing and drying three-in-one industry application

The three-in-one vertical fixed cylinder, conical filter, washing and drying is a fully enclosed structure, intermittent operation, vacuum filtration and heating and drying are used to remove solvents, especially suitable for dealing with flammable, explosive, toxic or highly toxic dangerous products, valuable products , as well as delicacy food, biological products and medicines that are not allowed to be contaminated.



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