Energy-saving fluidized bed type jet mill

Abstract

The invention relates to the technical field of fluidized bed type jet mill equipment, and provides an energy-saving fluidized bed type jet mill. The mill comprises a base, a plurality of circulating petals and a classifier. A first crushing cavity is formed in the base; the plurality of circulating petals are distributed on the base circumferentially in an array manner with the axis of the base as the rotating axis, and second crushing cavities are formed in the circulating petals; the first crushing cavity is communicated with the second crushing cavities; the classifier is arranged at the axis of the base; a first crushing nozzle assembly which is horizontally arranged is arranged in the first crushing cavity; flow guide islands are arranged in the second crushing cavities, the flow guide islands and the circulating petals form a flow guide channel, and a second crushing nozzle assembly is arranged in an air inlet channel of the flow guide channel; and an air outlet of the flow guide channel faces the working face of the first crushing nozzle assembly. Under the action of the second crushing nozzle assembly, the flow guide channel forms circulating air flow along the air inlet channel, the air outlet and the first crushing cavity; and according to the jet mill, materials can be efficiently crushed, and compared with traditional fluidized bed type airflow crushing equipment, the jet mill has better energy-saving and environment-friendly effects.

Description

technical field [0001] The invention relates to the technical field of fluidized bed airflow milling equipment, in particular to an energy-saving fluidized bed airflow mill. Background technique [0002] The fluidized bed pulverizer mainly uses high-speed airflow and the collision of materials to realize the pulverization of materials. The materials are mainly ultrafine and ultrafine powders; there are two types of commonly used equipment, one: disc type airflow pulverization The characteristics of the pulverizer are that the crushing area formed between their upper and lower covers (the distance between the upper and lower covers is only 10-20mm) and the middle ring is very narrow, so that the powder added to the pulverizer is easily hit by the airflow; Two: Fluidized bed colliding jet mill, which is characterized by a simple structure and a classifier inside, which can control the size of the output; at the same time, there is also a Chinese patent with application number ...

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Problems solved by technology

[0002] The fluidized bed pulverizer mainly uses the high velocity airflow and the collision of the material to realize the pulverization of the material. The material is mainly ultrafine and ultrafine powder; there are two kinds of commonly used equipment, one: disc airflow pulverization The characteristics of the pulverizer are that the crushing area formed between their upper and lower covers (the distance between the upper and lower covers is only 10-20mm) and the middle ring is very narrow, so that the powder added to the pulverizer is easily hit by the airflow; Two: Fluidized bed colliding jet mill, which is characterized by a simple structure and a classifier inside, which can control the size of the output; at the same time, there is also a Chinese patent with application number 200520073166.2, which discloses a circulating flow The chemical bed airflow mill improves the crushing efficiency and is also equipped with a classifier to better control the output of the material

[0003] The above types of fluidized bed jet milling equipment have more or less the following problems: 1: Because the air velocity in the fluidized bed jet milling equipment is relatively fast, all small and unbroken materials will be Driven by the high-speed airflow, it is left in the air, reducing the crushing efficiency of the entire equipment; 2: The direction of the entire material crushing is not clear, and the probability of the material entering the crushing place again (where the high-speed airflow collides) is very low, so that The crushing efficiency is particularly low; in summary, when the inherent fluidized bed grinder obtains the finished product of the target size, it takes a long time to grind, resulting in high energy consumption of the equipment

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