inverseFlow type pressure spray dryermain features
OneThe drying rate is fast, and the surface of the material is greatly increased after atomization, and can be evaporated instantaneously in the hot air stream95-98%Water, complete drying time is only several seconds to tens of seconds, particularly suitable for drying heat sensitive materials.
TwoThe products are spherical particles with uniform particle size, good flowability and good solubility. The product has high purity and good quality.
ThreeWide range of use, according to the characteristics of materials, you can use hot air drying, you can also use cold air granulation, the adaptability of the material is strong.
FourThe utility model has the advantages of simple operation, stability, convenient control, and easy realization of automatic operation.
Technological process
Pressure type spray granulation drying machineIt is mainly composed of feeding system, drying system, dust removal system, heating system and electrical system. Each system also includes some related equipment.
The feeding system is composed of a mixing barrel, a filter, a diaphragm pump and an airbrush. The two ball milling slurry is transferred from the ball mill to the mixing tank, then the filter is pumped and delivered by the membrane pump and then passed through the spray gun into the drying tower.
Starting from the spray gun nozzle into the drying tower, the spray process of spray granulation and drying is carried out, and the process is divided into three stages:
(1)Slurry atomization.
The slurry by the diaphragm pump feeding system in a certain pressure from the nozzle is pressed into the drying tower, the pressure energy is converted to kinetic energy, the slurry from the bottom to the top from the nozzle, forming a layer of high speed liquid film, the film is split into droplets immediately. The droplet size produced by atomization is inversely proportional to the pressure, and the productivity of the nozzle is proportional to the square of the pressure.
(2)Fog drying into balls.
Work with hot air mist particles to flow in a mixed flow mode, hot air is entering the tower through the hot air distributor on the top cover, hot air distributor produce a downward flow of air flow, the droplet from the bottom to the top is sprayed into the hot air. Droplets form spherical because of surface tension, and at the same time, because of the large surface area of droplets, the water evaporates rapidly, drying, and finally contracted to form dry spherical particles.
The spherical particles formed in the drying tower are gradually settled and separated from the hot air, and the funnel cavity at the lower part of the tower collects particles and is discharged from the discharge port. The finer particles, together with the dry air, are drawn into the dust removal system by suction fans attached to the funnel-shaped upper part.
(3)Particle powder discharge.
A drying system is composed of a blower, a drying tower and an exhaust fan for conveying hot air to the drying tower.
Dust removal system consists of high efficiency cyclone separator, bag dust collector, centrifugal fan and so on. The exhauster sends the finer particles together with the dry air into the high efficiency cyclone separator. Through effective separation, fine grain collection and recycling tube enters the separator at the bottom of the left exhaust gas contains a very small amount of fine particle material by centrifugal fan suction bag filter after dust collection, the harmless treatment of waste gas, the exhaust gas exhausted from the chimney.
In addition, the heating system of electric heater and gas stove and other components of the machine to dry through hot air. Monitoring and control of electrical system components and electrical control cabinet is installed in the inlet and outlet temperature monitoring field sensor, all major sectors of the spray granulation dryers, to ensure the normal operation of the equipment.

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