南宁附近有没有服务

 Milton law metering pump agent

    Product search
    Product Name:
    Product price: reach
    More > > contact us

    Henan Qingshi environmental protection equipment Co., Ltd

    Contact: Mr. Duan

    Tel: 18037579877

    Address: no.1601, building 9, No.220 Jinsuo Road, high tech Zone, Zhengzhou, Henan Province

    Engineering Department 1: Wang Gong

    Tel: 19939136330

    Engineering Department 2: Sun Gong

    Tel: 15037255

    Technical articles

    home page >> Technical articles >> Working principle of mixer南宁附近有没有服务

    Working principle of mixer

    Release time: 10:00:53, September 8, 2020 Author: Henan Qingshi environmental protection equipment Co., Ltd

    Mixer is determined by many parameters. It is impossible to describe a mixer with any single parameter.

    Shaft power (P), blade discharge (q), head (H), blade diameter (d) and mixing speed (n) are the five basic parameters to describe a mixer.

    The discharge volume of the blade is directly proportional to the flow standard of the blade itself, the first power of the blade speed and the third power of the blade diameter. The shaft power consumed by stirring is directly proportional to the specific gravity of the fluid, the power criterion of the blade itself, the third power of the rotating speed and the fifth power of the blade diameter.

    Under the condition of certain power and blade form, the liquid discharge (q) and pressure head (H) can be adjusted by changing the matching of diameter (d) and rotating speed (n), that is, large diameter blades are equipped with low speed (ensuring the shaft power is unchanged) The mixer produces higher flow effect and lower head, while the small diameter blade with high speed produces higher head and lower flow effect.

    In a stirred tank, the way to make the pellets collide with each other is to have sufficient shear rate. From the view of stirring mechanism, it is because of the existence of fluid velocity difference that the fluid layers are mixed with each other. Therefore, the shear rate of fluid is always involved in the mixing process. Shear stress is a kind of force, which is the real cause of bubble dispersion and droplet breakup in stirring applications. It must be pointed out that the shear rate of fluid in the whole stirred tank is not the same.

    Through the study of shear rate distribution, it is found that there are few four shear rate values in a stirred tank. They are: the experimental study shows that the shear rate and average shear rate of * * increase with the increase of rotating speed, no matter what type of pulp, when the blade diameter is fixed. However, when the rotating speed is constant, the relationship between the shear rate and the average shear rate and the blade diameter is related to the pulp shape. When the rotating speed is constant, the shear rate of radial blade increases with the increase of blade diameter, but the average shear rate has nothing to do with the blade diameter.

    These concepts about the shear rate in the blade zone need to be taken care of in the design of the mixer to reduce and enlarge. Compared with the large tank, the small tank mixer often has the characteristics of high speed (n), small blade diameter (d) and low blade tip speed (nd), while the large tank mixer often has the characteristics of low speed (n), large blade diameter (d) and high blade tip speed (nd). [1]

    Share with:
    more...

    Previous: Overview of vertical liquid mixer
    Next: Calibration method of pH meter