Lab Disperser

Content
1. What is lab disperser?
    1.1 Lab disperser working principle
    1.2 Composition of lab disperser
2. Feature of lab disperser
    2.1 How to select lab disperser?
3. How to use lab disperser?
    3.1 Laboratory disperser use
    3.2 Notes on laboratory disperser
4. How to buy lab disperser?

As a kind of mixer in a broad sense, high-speed mixer, also known as disperser, uses a high-speed mixer to form a strong turbulent flow locally and usually has a strong dispersing and emulsifying effect on the material. The lab disperser is used to test whether the performance of a small amount of emulsion can meet the design requirements, and to pave the way for the industrial production of batches. This machine has the advantages of small size, easy to move, simple operation, and no requirement for the site.

The laboratory disperser is also an experimental laboratory high-speed disperser, which is mainly used in laboratories and for stirring, dissolving and dispersing many kinds of liquids. It can also dissolve, disperse and grind very high viscosity materials with good results. Laboratory dispersion machine is widely used in many kinds of pigments, coatings, and other industries for dispersion and experiments. It not only provides the basic data for scientific research and pilot and batch production but also provides the scientific basis for research.

The working principle of the lab disperser is to use the ball mill medium and materials in the ball mill tank to roll over at high speed, thus producing strong shearing, impact, and crushing effects on materials to achieve the purpose of crushing, grinding, dispersing and emulsifying materials.

Emulsification is the process of rapidly and uniformly transferring one or more phases (liquid, solid, gas) into a continuous phase (liquid) that is immiscible with each other. In general, the phases are immiscible. When external energy is input, the two materials reorganize into a homogeneous phase. Due to the high tangential speed and strong kinetic energy brought by the high-frequency mechanical effect of the rotor rotating at high speed, the material is subjected to strong mechanical and hydraulic shear, centrifugal extrusion, liquid layer friction, impact tearing, and turbulence in the narrow gap of the stator and rotor. Through these combined effects, the material gradually becomes a suspension, emulsion, or foam form. This allows the immiscible solid, liquid, and gas phases to be instantly dispersed and finely emulsified under the combined action of the corresponding mature process and the appropriate amount of additives. After the cyclic process of high frequency, the final product can be obtained with stable and high quality.

The basic structure of the lab disperser is composed of a motor, dispersing impeller, and dosing tank.

The electric motor of the laboratory disperser can rotate the spindle at variable speeds.

There is a dispersion impeller under the main shaft of the dispersion machine. The rotation of the main shaft can drive the dispersion impeller to rotate at high speed and produce a mixing and dispersion effect on the materials.

The dispersion impeller under the dispersion shaft is a kind of serrated impeller. The circumferential edge of the impeller is bent up and down into a serrated shape so that its tilt angle is 20°~40° along the tangent direction. When the impeller rotates, the vertical edge of each tooth can produce a strong impact. The outer edge of the teeth pushes the object to flow outward, forming circulation and shear force.

During the dispersion process, part of the material near the serrated teeth is accelerated and thrown out, while part of the inner deceleration slides over the inner edge surface of the teeth to strengthen the shearing effect. The paint is continuously accelerated and slide-cut near the saw teeth and is dispersed under the effect of viscosity. The holes between the serrations can form air turbidity to increase the dispersion effect of the pigment particles.

The head of the high-speed dispersion can be lifted and controlled by hydraulic pressure and can rotate 180°~360° around the column.

A tool used to hold dispersed materials.

a. Adopting various specifications such as electromagnetic speed control, frequency conversion speed control, and three speeds, making its operation stable and powerful, and suitable for various viscosities.

b. There are two kinds of hydraulic and mechanical lifting forms so that they can lift and rotate freely and adapt to various positions.

c. Equipped with explosion-proof configuration, which makes it safe and reliable, and simple to operate and maintain.

d. It has strong production continuity and the ability to disperse and dissolve materials quickly, so its dispersion effect is good, and it has the characteristics of high production efficiency, smooth operation, and easy installation.

e. There are different power and models for different materials' viscosity and processing capacity.

f. Working Feature

a) The strong centrifugal force throws the materials into the narrow and precise gap between the stator and rotor from the radial direction, and at the same time, the materials are initially dispersed by the comprehensive force of centrifugal extrusion, liquid layer friction, and liquid force impact.

b) The rotor of the dispersion machine rotates at high speed to produce a linear speed of at least 15m/s or more. The material is fully dispersed and broken under the action of strong hydraulic shear, liquid layer friction, tearing collision, and shot out at high speed through the stator slot.

c) The material of the disperser is continuously shot out from the radial direction at high speed, and the flow direction is changed under the resistance of the material and the container wall. At the same time, under the action of the upper and lower axial suction force generated in the rotor area, two strong turbulent flows are formed on and off. After several cycles, the material finally completes the dispersion process.

a. Before choosing a laboratory disperser, you should have a detailed understanding of the characteristics and requirements of the material, such as sample volume, viscosity, temperature, vacuum, fineness, and other requirements. Many users often ignore the importance of material samples when selecting equipment, resulting in the selection of equipment that cannot disperse the material or cannot achieve the expected results.

b. Define the effect and purpose of the equipment to be used (mixing, dispersion, grinding, emulsification, or other). Since different production applications require different materials and dispersion effects, it is important to understand the equipment in detail before selecting.

c. Determine the operating parameters as well as the structure of the disperser equipment to ensure that the selected equipment is of reliable quality, superior performance, and meets the actual application requirements.

a. Check whether the oil level of the disperser is filled to the prescribed position. The low level should be added to the prescribed oil level and the high level should be put to the prescribed position.

b. Check whether the elasticity of the v-belt is appropriate.

c. The impeller should be rotated flexibly by hand, with no friction sound.

d. Check whether the fasteners are loose and whether there is leakage in each sealing part.

e. Turn on the main motor of the lab disperser and check whether the direction of stirring is the same as the direction specified by the equipment.

f. Confirm that the above is in good condition before proceeding to the next step.

a. Place the impeller in the center of the lab disperser container, press the drop button and drop to the lowest position or the required position.

b. The two handles must be locked before starting.

c. Turn on the main motor and press the button at the required speed for operation.

d. During the operation, you should always pay attention to the current. If an overload operation is found, stop the machine to check the cause and take measures before continuing to run the disperser.

a. Stop the main motor of the lab disperser first, so that all impellers stop rotating.

b. Press the up button of the disperser to make the spindle impeller rise above the vessel.

c. Clean the impeller.

a. To avoid the risk of electric shock, do not bring any part other than the dispersion cutter head into contact with the work material.

b. The dispersing time of the lab disperser should not be too long, usually around 10~15 minutes.

c. Be careful not to run the laboratory high-speed disperser empty. During operation, you have to start and stop slowly.

d. When handling dangerous chemicals, appropriate protective measures must be taken for hands, eyes, and other body parts.

e. In the process of using, cleaning, and placing, the stator and rotor of the dispersing knife head should be facing down.

f. When the lab disperser is used for too long, its impeller will wear out and reduce the dispersing efficiency. Impellers should be replaced when this happens.

g. Prevent the splashing of working materials that may be caused during the operation and speed regulation of the equipment.

h. In a lab high-speed disperser, the material dispersion process cannot increase the speed without any basis. You have to improve the dispersion efficiency according to the different material compositions to adapt to the performance of the high-speed disperser.

i. When using this equipment, you must follow the following basic safety protection measures for electric shock, fire hazards, personal injury, etc.

j. The equipment must not be operated after it has malfunctioned or been damaged.

k. It is recommended to wear hearing protection when the machine is in operation.

l. The exhaust air slots on both sides of the motor are forbidden to be blocked.

If you are interested in our lab disperser or have any questions, please write an e-mail to [email protected], we will reply to you as soon as possible.