1、 Overview of stirred reaction kettle
A stirred reactor is a reactor with stirring function. According to the different stirring forms, there are ordinary stirring reactors and magnetic stirring reactors. According to the different stirring speeds, there are low-speed reaction vessels, medium speed reaction vessels, and high-speed reaction vessels. The stirred reactor provides favorable conditions for the reaction of materials based on the stirrer. 2、 Characteristics of stirred reaction kettle
The main feature of a stirred reactor is the different stirring forms, commonly including blade stirring, push stirring, style stirring, anchor stirring, scraping stirring, etc. Two blade mixing is the most basic type of slurry, with horizontal circulation being the main mode at low speeds; At high speeds, it is radial flow; When there is a baffle, it is a vertical circulation flow. Suitable for mixing, homogenization, blending, dissolution, heat transfer or crystallization of low viscosity liquids, or working in laminar flow at high viscosity, using multi-layer large-diameter low-speed stirring. Slant blade mixing can be made with inclination angles of 24 º, 45 º, or 60 º, with axial and radial flow distribution. Spiral blades are arc-shaped blades that are compatible with the tank body and combined with inclined blade slurry, suitable for mixing, homogenization, heat transfer, reaction, etc. with medium to high viscosity. Generally used in combination with multiple layers. The vertical stirred reactor has the characteristics of double helix slurry. Curved edge inclined blade propeller is a type of inclined blade propeller, with the bottom rotating surface close to the elliptical surface of the container, and the blade plane perpendicular to the rotating axis, also known as the inclination angle of 45 º, serving as a scraper and mostly operating at low speeds. It can be operated in overcurrent or laminar flow areas. Turn on the turbine type stirring radial flow mixer, which has a wide range of operating speeds, viscosity, high shear force, and turbulent diffusion ability. Due to its lack of a disc, it does not hinder the mixing of the upper and lower layers of the blade. It can form a large convective circulation in a baffle groove, making it particularly suitable for shear dispersion operations. Due to its good circulation and shear capabilities, it is also used for general solid dissolution, reaction, heat transfer, emulsification, crystallization, and solid suspension operations. The inclined blade turbine axial flow agitator has good convective circulation ability and certain turbulent diffusion ability, and is suitable for applications such as mixing, dispersion, particle crystallization, reaction, dissolution, solid-liquid suspension, heat transfer, etc. The stabilizing plate structure is mainly used near the critical point of shaft design, where radial centering is required in the axial direction. Frame blade scraper type, in laminar flow operation, prevents heavy components from depositing at the bottom, suitable for crystallization, extraction, washing and other processes, and can also be used for heat transfer of high viscosity liquids. The three blade propulsion type is the most typical axial flow agitator, with high liquid discharge and low shear performance; The use of baffles or deflectors results in stronger axial circulation. The discharge performance is significantly improved due to its strong circulation ability and low power consumption. Its advantages are best demonstrated in large capacity homogeneous and mixed processes, and it is widely used in low viscosity liquid heat transfer, reaction, suspension, dissolution and other processes with low solid-liquid ratio. The three blade propulsion type is the most typical axial flow agitator, with high liquid discharge and low shear performance; The use of baffles or deflectors results in stronger axial circulation. The discharge performance is significantly improved due to its strong circulation ability and low power consumption. Its advantages are best demonstrated in large capacity homogeneous and mixed processes, and it is widely used in low viscosity liquid heat transfer, reaction, suspension, dissolution and other processes with low solid-liquid ratio. Screw mixing is a slow speed mixer that operates in the laminar flow zone and is suitable for mixing and heat transfer processes of medium to high viscosity liquids. The diameter of screw mixing is small, the axial thrust is large, the screw is equipped with a guide tube, and the axial flow is strengthened, forming a downward upward circulation inside and outside the guide tube. Frame stirring is suitable for processes such as mixing, heat transfer, and reaction of medium to high viscosity liquids. Often operated in laminar flow, horizontal circulation is generated, such as for folded blades or angle steel blades, which can increase the vortex near the blade. Vertical blades and crossbeams can be added to the propeller blades as needed to increase the mixing range.
3、 Selection of technical parameters for stirred reaction kettle