Vertical Conical Mixer Dryer Introduction
Reaction, filtration, and drying are three very important unit operations in the chemical, pharmaceutical, and food industries. Generally, three units of equipment: reactor, filter, and dryer are required to complete. Each of the three unit equipment has its own supporting device. Because of the large area and high cost, the handling or transportation of materials between the units is more troublesome. Not only is labor intensive, but also easy to cause material loss and waste. Inflammable, explosive, toxic or highly toxic materials or non-contaminated biological products, medicines, foods, etc., require airtight operation. At this time, the transportation of materials between the three devices of reaction, filtration, and drying is more difficult. Sometimes As a result, the whole set of equipment is often unable to operate normally or has high labor intensity, long production cycle, high energy consumption, and low efficiency, which affect product quality.
It is based on the above reasons that we have carried out a lot of design and research and development work, and finally successfully developed the SR-cylinder-cone reaction filtration and drying multifunctional machine, the invention patent number: ZL2017 2 1560677.6. A major breakthrough in chemical equipment technology has been achieved. The invention of this machine has had a significant impact on the chemical equipment technology field in China and even the world.
Vertical Conical Mixer Dryer has a barrel-cone structure. Heating jackets are set on the cylinder and the lower cone to heat or cool the material. Inside the multifunctional machine is a hollow shaft and a variable-angle and variable-lead hollow spiral stirring device. Stirring, mixing and lifting the materials, and pushing out the materials when they are discharged. A conical filter device with a more complicated structure is arranged in the lower cone, and a specially designed quick-opening discharge device without dead angle or a pneumatic discharge ball valve without dead angle is arranged at the bottom of the equipment.
In the reaction stage, the reaction material is added from the top. The unique stirring structure can make the material get a very uniform stirring in the machine, and it is heated or cooled through the barrel jacket, cone jacket, hollow shaft and hollow spiral blade at the same time. Make the material fully react in the machine. In the filtering stage, the machine can make the material in the machine filter dry by pressurizing or vacuuming, and add washing liquid, so that the material can be automatically repulped and washed in the machine for many times, and then pressed dry after reaching the washing requirements. In the drying stage, the barrel jacket, cone jacket, hollow shaft, and hollow spiral belt heat the materials at the same time and draw a vacuum on the top, and vacuum-sealed the materials for low-temperature drying. After drying, the materials are automatically sealed and discharged.
Vertical Conical Mixer Dryer Working Process
1. Stirring reaction
Add the materials to be reacted (solid-liquid, liquid-liquid or gas-liquid) 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 in a clockwise direction (looking down from the top). The unique mixing structure at the time can make the materials fully stirred and react fully in the machine. If heating or cooling the materials during the reaction process, heat or refrigerant can be passed into the barrel and cone jacket, as well as the hollow shaft and the hollow ribbon. The heating or cooling medium is continuously circulated to complete heating or cooling of the material to meet the process conditions required for the reaction.
2. Press filter or vacuum filter
After the reaction is completed, open the lower filtrate outlet, and pass compressed air or nitrogen into the equipment to perform pressure filtration on the reacted solid-liquid mixture until the materials in the machine are pressed dry. 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 hollow ribbon can be rotated in a clockwise direction (viewed from the top) to lift the material, and the hollow ribbon can limit the thickness of the filter cake layer when rotating, so that the material is in a thin filter cake Filter under the condition of layer to increase the filtering rate. For materials that are easy to filter, the materials can be filtered dry without stirring.
3. It can be washed and filtered multiple times
Some materials need to be washed several times after filtering. The multifunctional reaction filter drying machine is ideal 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 re-slurry through the hollow shaft and the hollow ribbon, and the material is pressed dry after the re-slurry is evenly stirred. If washing once is not enough, you can perform multiple washings. In this case, repeat the above steps several times. The operation is very convenient and the labor intensity is extremely low.
To wash the material in the above method, we call it intermittent washing method. Since the material is pressed dry each time and then the washing liquid is added for washing, although the valve is opened and closed a little more times during operation, the washing liquid is used less. The machine can also wash the material continuously, that is, the washing liquid is continuously pressed in by a pump or other methods, and the pressure of the washing liquid is used for filtration. The hollow shaft and the hollow spiral belt are continuously stirred, and the filtrate is continuously discharged from the filtrate outlet until Until the washing requirements are reached, the filter cake is finally pressed dry. This continuous washing method generally requires more washing liquid than intermittent washing, but it is more convenient to operate.
4. Vacuum drying and discharge
Filtered or washed, filtered and press-dried filter cake is stored in the machine. At this time, a heat medium is introduced into the barrel jacket, cone jacket, hollow shaft, and hollow spiral belt to heat the material. At the same time, the hollow shaft and hollow spiral The belt still rotates in a clockwise direction to lift the material upwards and fully agitate, while vacuuming is performed on the top of the equipment, so that the material is vacuum-sealed and dried in the machine. In addition to the jacket heating, there are also hollow shafts and hollow ribbons that are heated from the inside, and the drying is performed under vacuum conditions, so the drying efficiency is very high.
When the drying is over, open the quick-open discharge port at the lower part of the equipment to make the hollow shaft and the hollow ribbon rotate clockwise and then counterclockwise. The dried material in the machine will be automatically pushed to the discharge port and sealed out material. At this point, the reaction, filtration, washing and drying process of a batch of materials is over.
Vertical Conical Mixer Dryer Application:
Intermediates for pharmaceutical and sterile API
Fine chemical industry
Printing and dyeing industry
Vertical Conical Mixer Dryer Advantage
1. One machine with multiple functions, can complete various operations such as reaction, extraction, filtration, repeated filtration, washing, and drying in one machine, and directly obtain the finished product.
2. The operation flexibility is large, and the operation can be adjusted by adjusting the filter pressure difference, rotating speed, screw extrusion lead, etc. to adapt to more changes in process conditions.
3. The machine can form a very thin filter cake on the surface of the filter medium, and the filtration rate per unit filtration area is very high, so the equipment is small and compact.
4. Fully enclosed system, the operating environment is quite good, especially suitable for handling toxic, flammable, explosive dangerous products and non-contaminated fresh food, biological products and medicines.
5. It can filter and wash. Especially when the material needs to be washed multiple times, the material can be re-pulped first, washed thoroughly in a suspended state, and finally filtered, which can reduce material handling, waste and loss, and the product quality is high .
6. It can be used for the three functional operations of filtration, washing and drying, so that the function of the three unit equipment is completed on this equipment, so that the equipment cost, floor space, labor intensity, energy consumption, etc. are greatly reduced.
7. The power consumption of Vertical Conical Mixer Dryer is low, and the extruded filter cake generally has lower moisture than the flat three-in-one, and the operation is also convenient.
8. Simplify and shorten the process flow, occupy a small area, and greatly save plant and equipment investment