Structural principle
The principle of liquid nitrogen comminution is a technical method of rapid freezing of substances through liquid nitrogen at low temperature and then comminution. Liquid nitrogen is a very low temperature liquid, with a boiling point of -196C at atmospheric pressure, which can freeze substances at extremely low temperatures, making them brittle and easy to break. The use of liquid nitrogen grinding technology can deal with polymer materials, biological materials, metal materials and other materials, can get fine, uniform, pollution-free powder. Liquid nitrogen grinding technology is widely used in pharmaceutical, chemical, food and other fields. In the pharmaceutical field, liquid nitrogen comminution technology can prepare high purity, uniform particle size drug powder, improve drug absorption rate and curative effect. In the field of food, liquid nitrogen grinding technology can prepare frozen food with uniform particles and good taste.
In the machine, the grinding rotor composed of 4 groups of cutters with a total of 56 blades is supported on the bearing seat of the left and right end covers for high-speed rotation, so that the solid material particles are squeezed, torn, collided, shear and other mechanisms between the tooth lining plate and the blade in the inner cavity, so as to achieve the purpose of crushing; At the same time, the high-speed rotation of the large and small impellers at both ends of the rotor, through the cavity form eddy current effect between the inlet and outlet, so that the crushed particles are smoothly imported (large clearance) to (small clearance), to achieve crushing and refining. In order to limit the temperature in the cavity to be too high, improve the crushing efficiency, and prevent the particles from sticking to the cavity, sticking knife, plugging teeth and clumping, four sets of wide cavity water jacket on the surface of the cavity are forced to cool the water, so that the temperature in the cavity is controlled at a low limit.
Advantages
This frozen crusher, liquid nitrogen as a cold source, the use of twin screw design, can effectively reduce the consumption of liquid nitrogen, from and reduce investment costs, twin screw design system, can make liquid nitrogen in the reflux crusher chamber, effectively make the crusher chamber material cold uniform, so that the material particle size after grinding uniform distribution, the advantages of high output, Compared with liquid nitrogen shredders on the market, liquid nitrogen consumption is reduced by two-thirds, suitable for crushing all kinds of difficult powder elastic materials, etc., leading the domestic crushing industry.
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