A spray granulation dryer

Abstract

The invention relates to the technical field of chemical equipment, and discloses a spray granulation dryer, which includes a mother liquor tank, a feeding pump, an atomizer, a heater, a drying tower, a discharge valve, a bag filter, an induced draft fan and a rotary diffuser , the mother liquid tank, the feeding pump and the atomizer are connected through pipelines, and the atomizer is fixedly installed in the middle of the inner cavity of the drying tower. Through the setting of the rotating diffuser, the mist droplets spread obliquely upwards and contact with the spiral hot air, and then mix with each other, which increases the drying time of the hot air on the mist droplets, improves the dryness of the particles, and eliminates undesired The dried mist droplets enter the cyclone separator, which simplifies the process and improves the processing efficiency. At the same time, the mist droplets can collide and merge. After reaching the required size of the particles, they are dried and fall into the bottom of the drying tower, improving the efficiency. The quality of the particles is improved, the substandard dust carried in the hot air is reduced, and the working intensity of the bag filter is reduced.

Description

technical field [0001] The invention relates to the technical field of chemical equipment, in particular to a spray granulation dryer. Background technique [0002] Spray granulation dryer is a kind of drying equipment that produces products after fluidization, dust removal, atomization, solidification and other treatments are carried out on materials to meet the particle size requirements. Its working principle is as attached figure 1 , add the finely ground powder and a certain amount of binder into the mother liquid tank 1 for stirring and reconciliation, and after uniform reconciliation to form granular powder, send it to the atomizer 3 through the feed pump 1, and Under the action, mist droplets are formed, spray upwards and meet the downward hot air formed by the blower 4, heater 5 and hot air distributor 6, the moisture in the mist droplets is dried by the hot air, and the particles formed fall into the drying chamber. At the bottom of the tower 7, at the same time, ...

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Problems solved by technology

[0003] One, the contact time between the upwardly sprayed mist droplets and the downward hot air is too short, so that the dryness of the particles is insufficient, and some of the mist droplets are not dried in time, and enter the cyclone separator 9 with the hot air, and the drying process The size of the particle size can only be controlled by the size of the droplet, which is easy to cause uneven particle size and poor quality

[0004] Second, because the hot air is vertically downward, it is easy to directly contact with the atomizer 3, so that the powder at the injection port is dried before it is sprayed out, causing the injection port to be blocked, affecting the spraying effect, and causing the quality of the particles to decline. If it is blocked, it needs to be shut down for maintenance, resulting in a decrease in processing efficiency

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