Small-capacity spray dryer drying equipment Introduction:

The small-capacity spray dryer drying equipment is designed and manufactured by absorbing international advanced technology,  whose design is compact and can be moved. The major components and electrical parts are imported from famous brands. It can be used without any auxiliary equipment, and the machine is a whole, portable, self-contained one.  Moreover, it also adopts PLC controller and touch-screen display. It is mainly for processing the fluid of high liquidity.

Centrifugal spray dryer drying equipment equipped with centrifugal atomizer, so hence the name. Centrifugal spray dryer drying equipment is one of the most widely used dryer in industrial production at present. The liquid is shaken into droplets by centrifugal force and then dried in the dryer by adding liquid on the high-speed rotating dispersing disk. On the surface of the dispersion disc, the liquid diffuses in a thin film and is thrown out at a high speed around the circumference. The atomization effect depends on the circumferential linear velocity and feeding rate, and is also related to some physical properties of the material liquid.

Principle of spray dryer drying equipment:
Unlike the pressure spray drying system, it uses a centrifugal disk atomizer. Centrifugal atomizer disk installed on the top of the spray tower, mud pump mud, the need for drying into high groove is located in the top of the tower has a certain height, the mud under the effect of gravity, the pulp out from high groove tube natural into the center of the tower centrifugal disk atomizer, centrifugal disk in motor driven at a speed of 4000 to 20000 r/min at high speed. When mud flows through the grooves on the centrifugal disk or through the nozzle to the edge, high tangential linear velocity is obtained. Once it leaves the centrifugal disk, it is immediately rubbed and torn by air and atomized into mud droplets.

The hot air discharged from the air heater is fed into the hot air distribution room at the top of the tower through the hot air duct, which contacts with the mud droplets in a downflow manner. The mud is dried into powder suitable for dry pressure forming and falls under the cone of the spray tower. The dry exhaust gas is drawn out from the suction nozzle located at the lower part of the cone, the fine powder is recovered by the dust collector, and the purified gas is discharged into the atmosphere by the exhaust fan.

Features of spray dryre drying equipment:
The features of centrifugal spray dryer are determined by the characteristics of atomizer:

(1) Centrifugal spray drying does not require strict filtration equipment. If there is no fibrous liquid in the feed liquid, it will not block the feed liquid channel.
(2) It can adapt to the material liquid with high viscosity (compared with pressure spray drying);
(3) Because the speed of the atomizer is easy to adjust, it is easier to empty the product granularity and the particle size distribution is narrow.
(4) It is not necessary to change the working state of the atomizer when the handling capacity is adjusted, and the same product can be obtained with the change of the feed rate at plus or minus 25%.
(5) As the fog group generated by centrifugal atomizer is basically on the same horizontal surface, the fog drops move along the direction of radial and tangential synthesis, with little axial initial velocity, so the diameter of the dryer is relatively large. The diameter and length are relatively small, and the space of drying chamber can be used to the maximum extent.

Parts of drying materials of spray dryer drying equipment:

There are some other drying materials in food industry like tomato ketchup, mashed potatoes, pumpkin, kinds of vegetable extract and edible gelatin, etc.

Matters needing attention of spray dryer drying equipment:

Technological requirements of spray droplet size should be uniform, in order to achieve the purpose of uniform drying, to obtain a uniform droplets, must reduce the vibration of the disc rotates, enter the liquid quantity in unit time constant of the disc, the disc surface level off is smooth, the circumference of the disc rate shoulds not be too small, the circumference of 60 m/s speed is the minimum value industry can be used. Such as in the dairy industry generally use 100 - 100 m/s, practice has proved that when the centrifugal plate peripheral speed through the hour (less than 60 m/s), the spray droplet uneven, spray distance is mainly composed of a group of thick liquid droplets and sink to the dish of near a group of fine droplets, the nonuniformity and reduce with the increase of rotational speed, the main coarse and shorten the distance between droplets and fine droplets. When the circular velocity starts to reach 60m/s, the above differentiation will not occur. In industry, the disk diameter is usually between 160 and 500 mm, with a speed of 3000 - 20000 r/min, or over 20000 r/min, and a circumference speed of 75 - 170 m/s.

Q: Where is your factory ?
A: Our company is in Changzhou city, and it is very near Shanghai. It takes about 1 hour to get to Changzhou. 

Q: How is the quality of your products ?
A: Our products come with best quality, it passed CE and ISO9001 certification. You can rest assured with the quality absolutely.

Q: How long is the warranty of your equipment ? 
A: One year/12 months.

Q: What is your payment term ?
A: Our usual payment term is T/T (30% T/T in advance, another 70% T/T before shipment). Other terms of payment can also be accepted after we discussion and agreement.

Q: How do you quote ?
A: The price we offer usually is FOB Shanghai price. If you want the CIF price, you should give us your delivery port first. And even can offer the EXW price (machine cost) for you if necessary.

Q: What should to do if the dryer drying machine break down ?

A: You should to be find which part is broken and inform our sales first. If you can not confirm which part is broken, you should tell us about the operation of the drying equipment and let us help you find out the problem of the equipment. Last but not least, if the parts broken belong to non-artificial factors within 12 months, we offer free replacement. If beyond 12 months, customers should bear the freight back and forth and accessories cost.

In order to quote you the right drying machine machine with best price, we would like to get the following information:

1. Name & state of drying raw material

2. Primary moisture & Final moisture (%)

3. Max drying temperature (℃)

4. Finished products' capacity per hour (KG/H)

5. Heating source ( like Natural gas, electricity, fuel oil or steam)

6. Electricity information in the using field (like voltage, Hz, phase)

7. Steel material of drying machine

8. Other special drying requirements