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Spray Drying Series

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PNSD Series Tall Form Pressure nozzle Spray Dryer

Introduction: Operation method◆This set is an apparatus that can finish drying and granulating at the same time.The needed ball granule with certain size and ratio can begot in accordance with requirements of process to adjust pressure,flow,and size of atomizing h…

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Operation method

◆This set is an apparatus that can finish drying and granulating at the same time.The needed ball granule with certain size and ratio can begot in accordance with requirements of process to adjust pressure,flow,and size of atomizing hole.

◆The working process of this set is as follows:the liquid of rawmaterial is pumped in through diaphram pump.The liquid of raw material is atomized into tiny droplets.Then it falls down with hot air in co-current form.Most parts of powder material is collected through the discharge port at the bottom.The exhaust and fine powder are separated by goingthrough the cyclone,and the exhaust is discharged by draft fan.The outlet of fan can also be equipped with two grades of duster.And its recovery ratio will be 96-98%.

◆The tower body,pipes and separator of this set contacting with raw material are made of SUS304.There is enough layer of heat preservation between inner and outer case of tower body.The filled material is fine glass cotton.The tower body is also equipped with observation door,sight glass,lamp-house and control meters and instruments that are controlled and displayed through electric control panel.

◆The heat source of this set may be steam or electric heater,with the features of convenient operation,quick start,compact structure clean hot air etc.Moreover,installed control and regulation device of the electric heater inside eletctric control cabinet,the inlet temperature can be controlled through stepless regulation.The steam,coal fuel or oil fuel can be applied to the place where has not electricity.It can replace electric heating partially or fully.The factory can provide different heating ways in accordance with the practical conditions of customer.


◆The drying speed is fast.The surface area of liquid raw material after being atomized will be increased greatly.95-98%of moisture can be vaporated at the moment.The time of drying needs about ten seconds to several tens of seconds.It is suitable for drying heat sensitive material particularly.
◆The finished product is ball granule with uniform size.Its fluidity and solubility are good.The purity of product is high and its quality is good.
◆Its scope of application is wide.According to the characteristics of raw material, it can use hot air to dry and can also use cool air to granulate.It has strong adaptability to raw materials.
◆Its operation is simple and stable and its control is simple and convenient and is easy to realize automatic operation.

Scope of Application

Granulating through atomizing dry:
Chemical industry:organic catalyst,resin,synthetic washing powder,oils,thiamin,dyestuff,intermediate of dyestuff,white carbon black,graphite,ammonium phosphate and so on.
Foodstuff:amino acids and similar substances,flavoring,protein,starch,dairy products,extractive substance from coffee,fish powder,extractive substance from meat and so on.
Pharmaceutical:Chinese patent medicines,agrochemicals,antibiotics,medical drinking agent and so on.
Ceramics:magnesium oxide,kaoline,all kind of metallic oxide,dolomite and so on.
Granulating through atomizing:all kinds of fertilizer,aluminum oxide,ceramics powder,pharmaceutical,heavy metallic super hardness steel,chemical fertilizer,washing powder,Chinese patent medicines and so on.

Process flow chart

Air filter
Air filter
Steam heater
Electract heater
Hot air rectifier board
Pressured atomizer
Rain drying tower
Buffer tank
Liquid tank
High-pressure pump
Refrigeration dehumidifier
Power return blower
Cyclone separator
Cloth bag deduster
Induced fan
Water film duster
Power return pipe
PLC control cabinet

Technical Parameter

1.The evaporated amount is related to characteristics of raw material The evaporated amount listed in the table is related to temperature.The data can be used for reference only. 

2.The atomizing pressure and Model of pump will be equipped in accordance with the amount of raw material to be treated and the size require of product. 

3.The power of fan should be increased suitably after equipped with cloth bag duster.

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