Wet pulverizer

Abstract

The invention discloses a wet pulverizer. The pulverizer comprises a rack, a pulverizing device and a gas flow device, wherein a pulverizing cavity is formed in the pulverizing device, a pulverizer head is arranged in the pulverizing cavity, the feeding end of the pulverizing cavity communicates with a feeding mechanism, and the discharging end of the pulverizing cavity communicates with a gas-liquid separation bin; the gas flow device is provided with a first jetting mechanism and a second jetting mechanism, the first jetting mechanism is installed on the feeding end of the pulverizing cavity, and nitrogen jetted by the first jetting mechanism forms a gas seal on the feeding end of the pulverizing cavity; and the second jetting mechanism is installed in the pulverizing cavity, and nitrogen flow jetted by the second jetting mechanism forms a gas flow barrier on the circumferential side of the pulverizer head. According to the low-temperature pulverizer, the gas seal formed through jetting of the first injection mechanism and the gas flow barrier formed through jetting of the second injection mechanism are utilized, so that the pressure stability of the inner side and the top of thepulverizing cavity can be kept, the vibration phenomenon caused by high and low difference of pressure values inside and outside the pulverizing cavity due to feeding and discharging is relieved, andthe operation stability of the pulverizer is improved.

Description

technical field [0001] The invention relates to the field of pulverizers, in particular to a wet pulverizer. Background technique [0002] Currently, the technology for producing ultra-fine powders is widely used from the field of food technology to the field of material technology. The technology of finely pulverizing solid particles and screening out particles with uniform particle size from pulverized powder has become a key technology. [0003] How to realize ultra-fine powder technology, generally adopt ultra-fine pulverizer to realize. The ultra-fine pulverizer is a powder manufacturing device. The powder pulverized into a certain particle size by other pulverization methods is added to the pulverization chamber. Here, a thin waist nozzle is used to inject gas at a supersonic speed at a high speed. Generally, an inert gas is preferably used. Like helium, nitrogen is also used, and in the case of materials that do not oxidize, air is also used. When air is jetted at ...

AI Technical Summary

Problems solved by technology

The particles that cannot be discharged will be deposited in the classifier and need to be cleaned regularly. Moreover, due to the air pressure in the crushing chamber, it is difficult for the partially crushed particles to return to the crushing chamber through other channels. Obviously, it is difficult to achieve this in this way.

If the method of pressurization is used to return to the crushing chamber, it will obviously increase the equipment cost, and it will also destroy the original air flow balance in the crushing chamber, which will cause more particles that are not sufficiently crushed to be discharged from the discharge port.

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