Mechanical equipment for uniformly mixing two or more materials.
Mixer is a mechanical equipment that uses mechanical force and gravity to evenly mix two or more materials. In the process of mixing, it can increase the contact surface area of materials and promote chemical reaction; It can also accelerate changes in the body.
Commonly used mixers are divided into four categories: gas and low viscosity liquid mixers, medium and high viscosity liquid and paste mixers, and powder and granular solid material mixers.
Main applications
Suitable for chemical industry and pesticides.
catalogue
1? Brief introduction of equipment
2? device type
3? option
Brief introduction of equipment
Commonly used mixers are divided into four categories: gas and low viscosity liquid mixers, medium and high viscosity liquid and paste mixers, thermoplastic material mixers, powder and granular solid material mixers.
The invention has the characteristics of simple structure, no rotating parts, small maintenance and low energy consumption. This kind of mixing machine can be divided into four types: airflow mixing, pipeline mixing, jet mixing and forced circulation mixing.
Mixer accessories are mainly made of wear-resistant alloy materials, including high-speed mixing scraper, mixing wing, wear-resistant liner, mixing arm, mixing shovel, planetary shovel, mixing plow blade, mixing rod, mixing rake, etc.
The mixing machinery of medium and high viscosity liquid and paste generally has strong shearing effect.
Thermoplastic mixing machinery is mainly used to mix thermoplastic materials (such as rubber and plastic) with additives; Mixers for powdery and granular solid materials are mostly operated intermittently, including machines with mixing and grinding functions, such as wheel rollers.
The moving parts of the mechanical stirrer will also have a shearing effect on the liquid when rotating. When the liquid flows through the wall of the agitator and various fixed parts installed in the container, it will also be sheared, so that many local vortices will spread.
For immiscible liquids with different densities and compositions, the shearing action and strong turbulence generated by stirring will tear the dense liquid into small droplets and make them uniformly dispersed in the main liquid. ?
device type
Common mixers include: plow blade mixer, ribbon mixer, gravity-free mixer, V-shaped mixer, double helix cone mixer, high and low speed liquid mixer, planetary power mixer, etc.
Double helix conical mixer
First, the main use:
Cone mixer is a new type of high-efficiency and high-precision particle mixing equipment, which is widely used for mixing all kinds of powdery particles in chemical industry, pesticide, dye, medicine, food, feed, petroleum, metallurgy and mining industries.
Second, the main features
(1) has advanced structure, convenient operation and safe and reliable operation.
(2) The stirring speed is fast and the quality is uniform. The double helix of the machine is arranged asymmetrically, which expands the mixing range, so it is more suitable for mixing materials with large specific gravity and mixing ratio.
(3) The energy saving effect is remarkable, and the energy consumption of this machine is only one tenth of that of the drum mixer.
(4) The abrasion and pressure transmission of granular materials are slight, and overheating reaction will not occur when mixing heat-sensitive materials.
(5) The mixed preparation is stable without delamination and segregation.
(6) The machine is sealed and dust-free, with simple operation, convenient maintenance and long service life. In addition, according to the user's requirements, the cone can be made into a pressure vessel for pressurized or vacuum operation.
(7) The rotation and revolution of this machine are completed by a set of motor and cycloidal pin-wheel drive reducer.
Third, the working principle
(1) Due to the revolution of the double helix, powder particles move along the cone wall.
(2) Due to the autobiographical nature of the spiral blade, the powder is discharged to the center of the cone for radial movement.
(3) The powder flows upward from the bottom of the cone and is discharged to the outer peripheral surface of the spiral for material mixing.
(4) The downward flow of powder particles caused by the rotation of the screw is due to the combined action of revolution and rotation of the screw in the mixer, which forms four flow forms of powder: the compound movement of convection, shear, diffusion and infiltration. Therefore, the powder can be quickly and uniformly mixed in the mixer. ?
Horizontal belt mixer
Horizontal double-shaft ribbon mixer is used to stir dry powder materials to achieve the purpose of uniform mixing. During mixing, the material is driven by two rotors moving in opposite directions, and they are in a compound motion state. The double-shaft blades drive the materials to rotate clockwise and counterclockwise along the inner wall of the barrel. The material near the axis rotates axially, and the outer screw drives the material near the cylinder wall to rotate axially, and the material is pushed axially from both sides to the inside, thus causing convection circulation, shear infiltration and mixing in the cylinder, and completing the rapid and uniform mixing of the material in a short time.
Product features:
1.u barrel structure, stable operation, uniform mixing, no dead angle, clean discharge and wide application range.
2. The internal and external double-layer spiral belts are used to stir alternately, which has fast mixing speed and high uniformity.
3. The bearings are at both ends of the mixer, so the materials are not easy to enter and the maintenance rate is low.
4.？ The screw conveyor is convenient to feed, and the feed inlet is flush with the ground, which is labor-saving and convenient to feed.
5. The internal structure and overall design materials have passed the ISO900 1 international quality system certification.
Working principle of horizontal double-shaft ribbon mixer;
This machine consists of two parts: feeding and stirring.
1. feeding part: the material enters from the feeding hopper, and is lifted into the mixer through the spiral blades, and then enters the mixing drum for mixing.
2. Mixing part: The mixing effect is good when the materials enter the mixing cylinder and move alternately. ?
Three-dimensional oscillating mixer
3. The working principle of the maintenance swing mixer is different from that of the traditional rotary mixer. It makes a unique translation, rotation and swing motion in the three-dimensional space of the cube, which makes the materials in the mixing cylinder in a complex motion state such as "rotating flow-translation-falling body", that is, the so-called turbulent state; The generate alternating pulse constantly push that material, and the turbulence generated by the movement has a changing energy gradient, so that every particle in the mixed material can not move, and every particle constantly change its position in frequent movement and diffusion, thus achieving a satisfactory mixing effect.
The three-dimensional swing mixer consists of a frame, a transmission system, a three-dimensional motion mechanism, a mixing cylinder and an electrical control system. The mixing drum in direct contact with materials is made of high-quality stainless steel, and the inner wall of the drum is precisely polished.
Series three-dimensional swing machine is a new type of material mixer, which is widely used in pharmaceutical, chemical, food, light industry and scientific research units. This machine can evenly mix powdery or granular materials with good fluidity, so that the mixed materials can achieve the best effect.
I. Performance characteristics
1, multi-directional movement, so that the materials in the barrel have more mixing points, the mixing effect is remarkable, and its mixing uniformity is higher than that of the general mixer;
2、? Design of the mixing drum of the three-dimensional swing mixer: the inner wall of the fuselage is precisely polished.
Second, the equipment installation
1. This machine has been unloaded, loaded and tested before leaving the factory. It can only leave the factory after normal work to meet the safety use of users;
2. Mode of transportation: 600 liters (including model 600) is transported by the whole machine, and no anchor and bolts are prepared; More than 600 liters are packed and transported, and the anchor and bolts are ready.
Third, the operation
1, this machine adopts electromagnetic speed regulation (or frequency converter speed regulation). Before starting, turn on the main power supply, then start the motor button, then start the on-off switch on the speed control panel (the inverter can press the touch button), the indicator light is on, and then slowly rotate to reach the normal mixing speed;
2. If the user needs the temple mixing time, it should be agreed in the contract. Our factory can install a time relay to allow users to specify the mixing time according to the mixing requirements of materials.
3. After mixing, turn it off according to the startup order. If the blanking is not ideal, click the button to meet the blanking requirements.
Fourth, matters needing attention
1. The mixing of this machine is three-dimensional mixing. Safety fence should be added in the effective range of drum to avoid life safety accidents. Do not stand in front of the cylinder before starting the machine to avoid accidents;
2, loading and unloading, electrical equipment must stop, in case of electrical failure, causing unnecessary accidents. ? [3]?
Vacuum drying mixer
Working principle:
Double-cone vacuum drying mixer is a double-cone rotating tank. In the tank, steam or hot water is introduced into the jacket for heating under vacuum, and the heat contacts the wet material through the inner wall of the tank. The water vapor evaporated after the wet material absorbs heat is pumped away by a vacuum pump through a vacuum exhaust pipe. Because the tank body is in a vacuum state, the rotation in the tank body makes the materials turn up and down, inside and outside, which accelerates the drying speed of the materials, improves the drying efficiency and achieves the purpose of uniform drying.
Use:
This machine is used for vacuum drying and mixing of powdery and granular materials in medicine, food, chemical industry and other industries, especially for materials with the following requirements:
1, which cannot accept high-temperature heat-sensitive materials;
2. Oxidizable and dangerous materials;
3. Materials that need to recover solvents and toxic gases;
4. Materials with extremely low residual volatile content are needed;
5. Materials with requirements for crystal shape;
The content comes from Baidu Encyclopedia