Vertical conical screw blender, Conical screw mixer for solids and powders
The vertical ribbon mixer for solids and powders by SHREE BHAGWATI, is especially suitable for the mixing and industrial homogenization in short time of powdery products and those with similar particle sizes, respecting the morphology of the products and offering a complete discharge. It allows liquids to be added during the process. The conical blender or mixer Or Dryer is very popular among many manufacturing industries including Pharmaceutical, Nutraceutical, Dyes and Pigments, Food colors, Food items, Spices, Cosmetics and many more.
Vertical conical screw blender for solids and powders, Conical screw mixer, Conical Mixer
Conical screw mixer
Conical screw blender entire batch is mechanically agitated and lifted by the mixing screw, shear applied to the product particles, the resulting wear and attrition, as well as finally the drive power required, are comparatively low and energy saving.
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Low power consumption
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Fast mixing times
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Minimum heat generation
Conical screw blender machine is a new type of high-efficiency and high-precision mixing equipment. It is widely used in the mixing of various powders in the pharmaceutical, chemical, feed and other industries.
Agitating Parts
The agitating parts of this series mixer are relatively simple with helical blades out of a principal axis driving the material from up to down and outside spiral belt distributed by cone-shape, jointing closely with cylinder to lift the material from bottom to up.
Conical Mixer Product-Friendly, Energy-Efficient and Fast
- Short mixing times, maximum 10 minutes.
- Repetitive mixings processes, reproducible and easy to scale.
- Mixer with low maintenance requirements.
- Spiral mixer in cantilever execution, without any bottom support.
- Complete discharge of the product.
Vertical single-shaft mixer / ribbon blender
Vertical single-shaft mixer / ribbon blender
All product contact parts of the mixer, such as the mixing screw, product outlet, cover and conical vessel are made of stainless steel. Remaining parts, such as the swinging arm, drive and bridge construction, are made of mild steel and covered with a multi-layer coating system. The mixer had to meet at least three customer requirements:
- Create a good, homogeneous mixture in a short time.
- Ability to add liquids during the mixing process
- The parts of the mixer must be able to pass through a door and corridors.
The mixers are suitable for a wide range of processing activities in the pharmaceuticals, food, plastics, metals & minerals, nuclear, chemical, pigments and coatings industries.
OPTIONS – Conical screw mixer
- Internally mirror polished Ra ≤ 0.6 µm (Grit 360).
- Externally polished in matte or mirror finish.
- Liquid injection by spraying.
- Heating/cooling jacket.
- Design under pressure and /or vacuum – refer to dryer and reactor.
- Choppers for mixing intensification and lump breaking.
- Lid with hydraulic opening.
- Sanitary design according to cGMP, FDA validated.
- ATEX executions on request.
- ATEX execution for internal zone 20/0 officially stamped.
- Solids loading and dosing systems.
- Electronic weighting systems.
- Formulation installations.
- Product packing systems.
Applications
* Dry Powder
* Dry Powder with liquid additives
* Slurry
* Paste
* Mixing and homogenization of powders, pastes and slurries
* Granulation or agglomeration of powders
* Addition or injection of liquids into dry powders
* Reaction under vacuum or pressure conditions
* Heating and cooling of powders
* De-aeration or densification of powders
* Homogenization of particle size and color
Powder conical screw mixers
TYPES OF SOLID-SOLID MIXINGS:
Solid-Solid mixing (may it be in powder-powder Or granules mixing) is usually classified into four categories viz.
A. Convective Mixing:
Convective mixing essentially involves the movement of mass in bulk Or gross displacement of the mass which leads to mixing on a large level.
Conical Ribbon Mixer
Conical ribbon screw type mixers
B. Shear Mixing:
Shearing action takes place due to sliding of a layer of powder or solid mass past another layer. Shear mixing may take longer than convective mixing, as the later appeals to the bigger volume of mass.
C. Diffusive Mixing:
The kind of mixing resulting from the random movement of particles within the mass is known as diffusive mixing, which results into more homogeneous mixture, however, can be a lot time consuming.
D. Chaotic Mixing:
The most irregularly patterned mixing, mostly resulting out of a random or undefined combination of convective and shear mixing is termed as chaotic Mixing.
Vertical Conical Shell (with Optional Limpet and Insulation) and the Top Dish: This vertical conical and optionally limpeted vessel is designed to handle desired volume of the mass with an optional provision of heating and vacuum (however, it is not mandatory). The limpet usually covers almost 80% of the height of the vessel. In case it is limpeted, the conical vessel is also insulated with hot insulation material such as Mineral Wool or Rock Wool and further cladded. The top dish is designed to take weight of the drive assembly, as well as, has a number of nozzles including the manhole.
Optional Vacuum Filter Assembly: In case of a vacuumized operation, a vertical cylindrical filter housing mounted on the vacuum nozzle located on the top dish. The filtration assembly includes a course PP filter (say 10 to 20 micron) whose objective is to arrest the powder particles from going into the condenser or vacuum pump along with the vapors.
Optional Chopper assembly Or Lump Breaker Assembly: A high speed chopping set of blades (rotating at around 200 to 300 rpm) mounted inside of the conical vessel (on the lateral surface) can be optionally provided with a gearbox and an AC frequency motor.
Optional Condenser: Typically, a Shell and Tube Type Heat Exchanger is used to condense the vapors coming out of the Conical Dryer. Usually the process side fluid (vapors) is passed through tubes, whereas, on the Shell side the utility fluid (mostly chilled water Or cooling water) is circulated. However, it can be the other way around too (depending on the heat load calculations). Condenser can be insulated and cladded for avoiding heat loss to the ambience.
Optional Receiver: A solvent recovery receiver is provided at the bottom of the STHE condenser. Receiver can be either Vertical Cylindrical with legs supports Or Horizontal Cylindrical with saddle supports. A vacuum breaking arrangement is provided with a Control/ On-Off valve on the receiver.
Optional Vacuum Pump: A suitable capacity Vacuum Pump is connected to the system (mostly to the receiver), which creates vacuum inside the Conical Dryer, and also facilitates the extraction of the vapors, hence complements the condensation process.
Optional Water Heating System Or Low-Pressure Steam (for heating the Dryer, Shaft, Ribbon): In case of a Hot Water System, a dedicated skid mounted vertical cylindrical vessel is provided with external heating i.e., either with steam (LPS) Or with Electrical Heaters. A circulation pump pushes the hot water into the Limpet, and the return water goes back into the Hot Water Generation tank. The level gauge/switch on this tank ensure water doesn’t spill over and make up water valves gets ON when level goes down. The Temperature sensor on the Hot Waters Tank, as well as sensor on the Inlet of the Limpet coil together controls the flow of Steam (through PID control valve) Or the Electrical Heater, thus ensures the inlet water temperature stays in control. In case of direct steam heating, the PID valve ensures steam is throttled and uniform temperature is maintained in the limpet.
CIP Or Spray Ball arrangement: Optionally, spray balls can be provided on the top dish of the conical shell, which can facilitate cleaning and washing of the main vessel post the batch operation is over.
Rotary Bottom Discharge Valve: The blended product is taken off from the bottom and is usually facilitated by the rotary discharge valve. A motorized rotary valve serves the purpose of uniform discharge flow without many wastages. In the rare case scenario, a knife gate valve or a butterfly valve can also be used.
Product introduction
1.Flexible material selection
Material can be carbon steel, manganese steel, ss304, 316L and 321; different material can also be used in parts, between the part contact with the raw material and the parts don’t contact with the raw material. Surface treatment for stainless steel can be sandblasting, wiredrawing, polishing, mirror polishing.
2.Reliable driven unit
The driven unit and power is varied according to different raw material, starting method, and processing.
Double screw conical mixer is equipped with appropriative double output reducer, which combines pinwheel, gear and warm and gear.
3.Excellent discharging unit
Spherical valve or plum-blossom dislocation valve is matched to the double screw conical mixer.The surface of the valve match the track of the bottom of screw, to reduce the mixing dead zone to the maximum, and to make the largest discharging area, so as to make sure no leftover. Spherical valve has excellent sealing effect to powder, liquid and even in the negative pressure state.Plum-blossom dislocation valve is easy to operate and control the discharging speed
4.Powerful auxiliary components
Equipped with circulation medium of jacket, the double screw conical mixer can realize the temperature control in mixing process.
In the mixer barrel, the part contact with material can coat some antiriot, anti-caking and metal isolation material according to different ingredient. In some severe wear conditions, the screw surface can be overlaid by some wear proof alloy.
If a small quantity of liquid is required during mixing, spraying or atomizing unit is necessary in order to mix the liquid evenly with the main ingredient. The liquid-adding system is basically composed by the three parts: pressure source, liquid storage pot and spraying nozzles.
Horizontal Ribbon Blenders – Powder-Blending-System
Horizontal Ribbon Blenders – Powder-Blending-System
