Coaxial double agitator and scraped wall reactor

The coaxial dual-stirring scraper reactor, also known as the coaxial dual-stirring wall-scraping reactor, is commonly referred to as the dual-stirring wall-scraping reactor, dual-stirring wall-scraping tank, or dual-stirring wall-scraping mixer. The principle behind it is that two stirring systems share a single axis, both working from the center of the tank. However, in reality, these two axes are concentric; one stirs on the outer axis, while the other stirs on the inner axis. One serves to mix and stir, while the other performs the scraping action. The dual-stirring wall-scraping reactor is suitable for mixing materials that are relatively viscous and prone to sticking to the walls. It ensures that any lumps or clumps formed by the material are thoroughly broken down and mixed, resulting in higher reaction efficiency and better performance.

The coaxial dual-stirring agitator reactor is suitable for various complex processes such as dissolution, dispersion, reaction, emulsification, and coagulation of materials. It is widely used in biopharmaceuticals, food, fine pharmaceutical chemicals, medicine, cosmetics, coatings, and polymerization. Typical Applications: Emulsified silicone oil, chlorinated butadiene rubber, casein, leather fatliquors, PU aqueous adhesives, and MBS coagulation.

• The coaxial double-stirring agitator reactor is made of high-quality stainless steel plates and welded heads. The material contact parts are S30408 (referred to as 304) or S31603 (referred to as 316L) stainless steel. The interior of the tank is mirror-polished, while the outer surface is matte-treated. The weld joints are polished smooth and mirror-polished, fully meeting GMP requirements.
• The combination of scraper and paddle mixing has the effect of preventing material from sticking to the tank wall. Low-speed variable frequency speed stirring is used to prevent bubbles caused by high speed. The low-speed stirring of the central paddle can create an alternating mixing environment for the material, making the mixing more uniform.
• The food and pharmaceutical industry uses sanitary grade stainless steel electrical control cabinet, which is not only good in appearance, but also clean. At the same time, it can comprehensively monitor the operation of equipment, and can display temperature, stirring speed and other data.
• The dual-stirring agitator combination for the wall-scraping reactor can adopt various types of agitators, suitable for producing different product types; in addition to scraping stirring, blade agitators include paddle agitators, propeller agitators, screw agitators, and three-blade propeller agitators. Since they are coaxial stirrers, the two stirring speeds differ, consisting of two motors and a reducer, typically a dual-motor reducer with large and small output shafts, one horizontal and one vertical, with the shafts located at the same position.

The double-stirring agitator reactor includes a tank, motor, and stirring shaft. The characteristic feature is that the stirring shaft consists of an outer shaft and an inner shaft concentric with each other. The outer shaft is fitted over the inner shaft and connected to a frame. The outer edge of the frame slides against the inner wall of the tank. The outer surface of the frame is connected to outer blades, while the inner shaft is equipped with inner blades. The outer and inner blades are arranged at intervals and staggered. The motor reducer has a two-in-one structure, each connected to the outer shaft and inner shaft respectively.

• The double stirring and scraping reactor can also be designed with pressure tank according to the production process requirements, and vacuum pump can be configured to carry out vacuum foaming, vacuum stirring, etc.
• The double stirring and scraping reactor can be a normal temperature single layer tank, or can be customized with heating or cooling devices according to the process requirements. The heating method can be selected by steam or electric heating according to customer requirements.

The dual-stirring and wall-scraping reactor is a versatile reaction vessel that integrates powerful stirring and wall-scraping functions. This equipment is highly adaptable to medium to high viscosity materials as well as those with thixotropic properties. Due to the simultaneous stirring and dispersion capabilities, it achieves excellent reaction results. The dual-stirring and wall-scraping reactor can perform either co-directional or bidirectional stirring, offering better mixing and dispersion effects with more flexible options.

The two most common stirring configurations for the double-stirring agitator with a scraped wall reactor are: 1. The combination of scraped wall stirring and paddle stirring, as shown in the figure below. This is suitable for mixing viscous but uniform materials. 2. The combination of scraped wall stirring and high-speed emulsifying heads, which is ideal for homogenizing and emulsifying high-viscosity materials. This configuration achieves the same effect as a double-stirring scraped wall emulsifying tank but has a different structural design. The double-stirring scraped wall emulsifying tank features two axes, allowing for vertical or central and eccentric stirring combinations. In the case of a coaxial combination, it consists of two rotating shafts, one inside the other, making it suitable for both large and small tanks.