An energy-saving fluidized bed jet mill

Abstract

The invention relates to the technical field of fluidized bed airflow pulverizer, and provides an energy-saving fluidized bed airflow pulverizer, which includes a base; a first pulverization chamber is arranged inside it; Circulation flap; there is a second crushing chamber in the circulation flap; the first crushing chamber and the second crushing chamber are connected; the classifier is arranged at the axis of the base; the first crushing chamber is equipped with a horizontal first crushing nozzle assembly ;The second crushing chamber is provided with a diversion island, the diversion island and the circulation valve form a diversion channel, and the air inlet channel of the diversion channel is provided with a second crushing nozzle assembly; the air outlet of the diversion channel faces the first crushing nozzle The working surface of the assembly is set; under the action of the second crushing nozzle assembly, the guide channel forms a circulating air flow along the air inlet channel, the air outlet and the first crushing chamber; the present invention can efficiently crush materials, compared with the traditional flow The chemical bed airflow pulverization equipment has good energy saving and environmental protection effects.

Description

technical field [0001] The present invention relates to the technical field of fluidized bed type jet mill, in particular to an energy-saving fluidized bed type jet mill. Background technique [0002] The fluidized bed pulverizer mainly uses the high jet air flow and the collision of the material to realize the pulverization of the material, and the material is mainly ultra-fine and ultra-fine powder; there are two kinds of commonly used equipment, one of which is the disc type airflow pulverization The characteristics of the crusher are that the crushing area formed between the 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 into the crusher is easily hit by the airflow; its Two: Fluidized bed collision type jet mill, which is characterized by simple structure and a classifier inside, which can control the size of the discharged material; at the same time, there is also a C...

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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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