Mixing tank manufacturer

       The meaning of a stirring tank is to stir, mix, blend, and homogenize materials. The stainless steel stirring tank can be designed with a standardized and user-friendly structure and configuration according to the requirements of the production process. The mixing tank can achieve feed control, discharge control, mixing control, and other manual and automatic controls during the mixing process.
       Mixing tanks, also known as aqueous tanks, are widely used in industries such as coatings, pharmaceuticals, building materials, chemicals, pigments, resins, food, and scientific research. This equipment can be made of materials such as carbon steel and stainless steel according to the process requirements of the user's product, as well as equipped with heating and cooling devices to meet different process and production needs. The heating forms include jacket electric heating and coil heating. This equipment has a reasonable structural design, advanced technology, durability, and features simple operation and convenient use. It is an ideal chemical equipment with low investment, fast production, and high returns.
       product mix
       he structure of the mixing tank: The mixing tank is composed of the mixing tank body, mixing tank cover, agitator, support, transmission device, shaft sealing device, etc. It can also be equipped with heating or cooling devices according to process requirements.
       The materials used for mixing tank body, mixing tank cover, agitator, shaft seal, etc. can be made of carbon steel or stainless steel according to different process requirements. The mixing tank body and mixing tank cover can be connected by flange sealing or welding. The mixing tank body and mixing tank cover can be opened with process pipe holes for feeding, discharging, observation, temperature measurement, pressure measurement, steam distillation, and safe venting according to process requirements. The upper part of the mixing tank cover is equipped with a transmission device (motor or reducer), which drives the agitator inside the mixing tank by the transmission shaft. The shaft seal device can adopt various forms such as mechanical seal, packing, labyrinth seal, etc. (determined according to user needs). Due to different production process requirements from users, mixers can be configured in various forms such as slurry, anchor, frame, and screw. If there are any other requirements, please contact our factory for further design and production. [1]
       Mixing shaft
       The power output by the electric motor in the mixing equipment is transmitted to the mixer through the mixing shaft, so the mixing shaft must have sufficient strength. At the same time, the mixing shaft should not only be connected to the mixer, but also pass through the shaft seal device, bearings, couplings, and other parts, so the mixing shaft should also have a reasonable structure, high processing accuracy, and fit tolerance.
       According to the support situation, the mixing shaft can be divided into cantilever type and single span type. The cantilever mixing shaft is not equipped with intermediate or bottom bearings inside the mixing equipment, making maintenance and repair convenient. Especially for biological, food or pharmaceutical mixing equipment with high cleanliness requirements, it reduces the number of components inside the equipment, so it should be prioritized.
       Internal components
       Including baffles, coils, guide tubes, gas distributors, etc.
       To eliminate the swirling phenomenon of the liquid in the stirring container and achieve uniform mixing by stirring the liquid up and down, it is usually necessary to add a baffle inside the stirring container. Generally, the width of the baffle is about 1/12~1/10 of the inner diameter of the container. The accessories in the equipment, such as thermometer, heat transfer coil or various supports, can also play a role of baffle, but the "full baffle condition" is often not achieved. Generally, when the number of baffles is increased to measure their width, the power consumption will also increase, but when it reaches a certain value, the power consumption will not increase again. This condition is called "full baffle condition".
       In the mixing container, the fluid can flow towards the agitator in various directions, and the stroke length of the fluid varies. When it is necessary to control the speed and direction of the reflux, a guide tube can be used to determine a certain condition. A guide tube is a cylindrical structure with upper and lower openings, installed inside a container and plays a guiding role in stirring and mixing. It can improve the stirring degree of the fluid in the container, strengthen the direct shear effect of the agitator on the fluid, and create a certain circulating flow, allowing the fluid in the container to pass through the strong mixing zone inside the guide tube, improving mixing efficiency. After installing the guide tube, the circulation path is limited, reducing the chance of fluid short circuits. The guide tube is mainly used for guiding water in push type, screw type, and turbine type agitators. [1]
       Shaft seal
       The shaft seal is an important component of the mixing equipment. The shaft seal belongs to dynamic sealing, and its function is to ensure that the mixing equipment is in a certain positive pressure or vacuum state, to prevent the escape of stirred materials and the infiltration of impurities. Therefore, not all types of shaft seals can be used in mixing equipment. In mixing equipment, the most commonly used shaft seals include liquid seals, packing seals, and mechanical seals.
       Liquid seal
       When the working pressure inside the mixing equipment is atmospheric, the function of the shaft seal is only to prevent dust and impurities from entering the internal working medium, or to isolate the working medium from coming into contact with the surrounding environmental medium of the mixing equipment, a liquid seal can be selected. The liquid seal structure is simple and there are no parts that cause friction in direct contact with the transmission shaft. However, to ensure that the gap between the cylindrical shell or stationary component and the rotating component meets the design requirements, the processing and installation requirements for the sealing parts are relatively high.
       Meanwhile, due to the influence of structural characteristics, the range of use of liquid seals is relatively narrow. It is generally suitable for situations where the working medium is non flammable, explosive, or slightly toxic, and the working pressure inside the equipment is equal to atmospheric pressure, with a temperature range of 20-80 ℃.
       It is worth noting that the liquid working medium should not be filled with the stirring equipment; And the sealing liquid should be as much as possible using the working medium inside the mixing equipment, or a neutral liquid that does not physically or chemically interact with the working medium, and must be extremely volatile and not pollute the atmosphere. [2]
       Packing seal
       It is an early adopted shaft sealing structure in mixing equipment, which has the advantages of simple structure, low manufacturing requirements, and convenient maintenance. However, its filler is prone to wear and tear, and its sealing reliability is poor. It is generally only suitable for mixing equipment with normal pressure or low pressure, low speed, non corrosive and weakly corrosive media, and allows regular maintenance.
       mechanical seal
       Mechanical seal is a device that changes the sealing surface of the shaft from axial to radial, and achieves sealing through the mutual fit of the two end faces of the dynamic and static rings, and relative motion, also known as end face seal. Mechanical seals have low leakage rate, reliable sealing performance, low power consumption, long service life, no need for frequent maintenance, and can meet the sealing requirements of production process automation, high temperature, low temperature, high pressure, high vacuum, high speed, as well as various flammable, explosive, corrosive, abrasive media and solid particle containing media.
       Compared to packing seals, mechanical seals have the following advantages:
       1. Reliable sealing, stable sealing state during long-term operation, with minimal leakage, only about 1% of the packing seal leakage;
       2. Long service life, generally up to 1-2 years or longer in oil and water media, and generally able to work for more than half a year in chemical media;
       3. The friction power consumption is low, and its friction power is only 10-50% of that of the packing seal;
       4. The shaft or shaft sleeve is basically not worn;
       5. Long maintenance cycle, automatic compensation after end face wear, generally not requiring regular maintenance;
       6. Good vibration resistance, insensitive to the vibration and deflection of the rotating shaft, as well as the deviation of the shaft from the sealing chamber;
       7. Widely applicable, it can be used for sealing in high temperature, low temperature, high pressure, vacuum, different rotation frequencies, as well as various corrosive and abrasive media.
       It is precisely because of the above advantages of mechanical seals that they have been widely used in mixing equipment.