Blenders are important equipment for industrial mixing. Currently, domestic mixers started late, and imported brands dominate in industries such as water treatment, pharmaceuticals, food, brewing, and chemical engineering.

At present, the main imported brands include: Keminier, Leining, Midon Luo, etc.

Keminiel:Keminier is a brand under National Oilwell in the United States, and is the inventor of pipeline static mixers. It belongs to National Oilwell along with Mono and Moiro screw pumps. Keminier has been specializing in mixing equipment for over 70 years, with rich metallurgical expertise in industries such as petrochemicals, papermaking, water treatment, metallurgy, and food and beverage.

At the same time, Keminier is a contracted supplier to companies such as National Starch, Mobil, BP, Sinopec, PetroChina, CNOOC, ChemChina, Coca Cola, Unilever, Procter&Gamble, Veolia, Suez Water, Thames Water, and Shanghai Municipal Engineering Institute.

Lai Ning:Lanning used to belong to General Machinery in the United States, but was later acquired by Spirk Fluid Industry Group. Lanning mixers are widely used in various industries, with high popularity and good reputation, and have a good market reputation and market share. At present, Laining has achieved a lot in various fields such as chemical, metallurgical, and water industries.

Milton Ronaldo:Milton Roy was previously owned by United Industries in the United States and has now been acquired by Ingersoll Rand Industries. The Milton Roy mixer, formerly known as Robin mixer, originated from a French marine propeller company. Due to the high market share of Milton Roy metering pumps in the water industry, Milton Roy has gained many customers in the water industry. At the same time, Milton Roy has begun to focus on the development of other industries.

Imported mixing machineMixing classification:
Disperse two or more miscible liquids
Dispersion and mixing of liquid-liquid systems (extraction, gold slag)
Dispersion and mixing of gas-liquid systems (bubble refinement, absorption, refining)
Dispersion and mixing of solid-liquid systems (suspensions, seed fractions, KR desulfurization, etc.)
Dispersion and Mixing of Gas Liquid Solid Systems (Carbonization Process)
Accelerate the progress of chemical reactions, heat and mass transfer processes.
Stirring can achieve several objectives simultaneously, such as suspending the fine particles of aluminum hydroxide and the generated aluminum hydroxide crystals in the liquid during the alumina seeding process, while also accelerating the chemical reaction, heat and mass transfer processes.

Mix the materials evenly
1. Make the gas well dispersed in the liquid phase
2. Uniformly suspend solid particles (such as catalysts) in the liquid phase
3. Uniformly suspend another immiscible liquid phase

Strengthen heat and mass transfer
1. Strengthen mass transfer between phases (such as absorption, etc.)
2. Enhance heat transfer

mixing equipment
Groove body: usually cylindrical, with flat or elliptical bottoms, conical bottoms and square grooves are not suitable for flow.
Stirring blade: core component
Drive device: usually composed of an AC motor, gear reducer or pulley reducer, to achieve the specified speed of the mixing blade.
Internal components: baffle or guide tube

The overall flow formed by the liquid in the stirring tank is a large axial and tangential circulation, with low turbulence, suitable for mixing low viscosity miscible liquids, suspending solid particles, and enhancing heat transfer in the tank.

Propeller type: small diameter, high speed, large flow rate, low pressure head.
Spiral belt type: large rotation radius, wide stirring range, low rotation speed, small pressure head, suitable for stirring high viscosity liquids.

The liquid undergoes tangential and radial vortex motion in the groove, resulting in a complex overall flow. Suitable for stirring medium and low viscosity liquids, especially for dispersing immiscible liquids, dissolving gases and solids, liquid-phase reactions, and heat transfer operations. Not suitable for systems that are prone to stratification.

Imported mixing machine- Paddle blades
Turbine type: high speed, wide blades, lower flow rate and higher pressure head compared to propeller type.
Flat blade slurry type: The blades are longer and the rotation speed is slower, resulting in lower pressure head. Can be used for stirring higher viscosity liquids.
Anchor type and frame type: with a larger rotation radius (only slightly smaller than the inner diameter of the reaction tank), a wider stirring range, lower rotation speed, and smaller pressure head, suitable for stirring higher viscosity liquids and often used to prevent sedimentation on the reactor wall.

The liquid rushes towards the wall under centrifugal force, causing the liquid level in the central part to drop and form a large vortex. The higher the rotational speed, the deeper the vortex formed. The effective volume decreases and there is almost no axial mixing, resulting in a decrease in stirring effect. In severe cases, negative pressure may occur, causing air to be drawn in from the surface and preventing the mixer from operating properly. Solution: Install a baffle in the slot. Excessive baffles will reduce overall flow and limit mixing to localized areas, resulting in poor mixing performance.

The agitator is essentially a pump, and the power provided by any impeller will generate pumping flow and pressure head. Its power can be expressed as N=QH * p. When N is the same, it can generate both high flow and low pressure head, as well as high pressure head and low flow head;
All the power provided by the impeller to the liquid is used to generate flow and pressure head; Different processes have different requirements for Q and H. For example, the mixing of low viscosity homogeneous liquids requires a large pumping flow rate, while gas-liquid mixing requires strong shear action. To achieve low power consumption and good mixing effect, the mixing device should be configured correctly according to the process requirements and power consumption should be allocated reasonably. Under the condition of equal power, larger diameter and low-speed impellers consume more power in the overall flow. Small diameter, high-speed impellers consume more power in turbulence.