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Horizontal Disc Dryer

PZG series Horizontal Disc dryer is an indirect heating drying processor which gives drying, mixing and breaking effects simultaneously under high vacuum condition.

1. Drying or heating paste, filter cake or powder materials under normal or high vacuum condition;
2. Heating area: 3-200 M2
3. Drying capacity: 300-15000 L/batch 
4. Working type: Batch or continuous 
5. Heat source: steam, hot water or hot oil 

Working Principle

PZG series horizontal disc dryer is an indirect-heating drying processor which gives drying, mixing and breaking effects simultaneously. Wet material is fed through the feed port. The main shaft with hollow discs rotates in different directions to regularly move and mix the material,  while vacuum is applied in the dryer and heating medium (steam, hot water or hot thermal oil) is circulated in the jacket of drying chamber and hollow discs. Evaporation of moisture takes place under high vacuum condition and vapors passes through the dust catcher into the condenser, where it is condensed and collected in the receiver tank. Dried material is discharged through discharge valve. 
PZG series horizontal disc dryer has been widely used in various industries for drying wet materials which have the following properties:
1) Powder, slurry, paste and filter cake wet materials;
2) Heat sensitive wet materials
3) Oxidizing, toxic, explosive wet materials

4) Moisture is organic solution and need to be recovered


Technical Features 

1) High thermal efficiency which can reach 95% 
2) Heat transfer medium does not contact the product.
3) Gas is not used to convey the product. Off-gas flow is minimal.
4) Precise control of temperature
5) Uniform product quality, thorough mixing and movement of the product
6) High heat transfer surface to process volume ratio - reduced floor space
7) Easy to operate, requires minimal attention
8) Safer than direct drying when processing combustible material
9) Simple durable design for easy and low maintenance


Hollow disc 

1) Considerably increase heating surface 
2) Mush less welding area than other types of paddle
3) Self-cleaning disc can considerably enhance heat transfer 
4) Small paddles welded on discs with different angles can perfectly mix and move wet materials 


Drying chamber with tubular heating jacket  

1) Max working pressure of heating jacket: 0.9 Mpa 

2) Max vacuum of drying chamber: 300 Pa 
3) Tubular heating jacket can ensure very uniform heating 
4) 80mm mineral wool insulation 

Integral bearing seat

1) Bearing seat mounted on end-plate to ensure concentricity 

2) Bearing is equipped with water cooling jacket 

3) Double-end mechanical seal to ensure high vacuum


Vacuum system

The vacuum system consists of two-stage tubular condenser, buffer tank and piston vacuum pump or pump set to guarantee high vacuum (300-2000 Pa) and recovering rate (95%) 

Typical Projects

Fish meal drying in Poland


Industrial sludge drying in China


Okara drying in Canada


Q: What information should be provided in order to get a proposal or quotation? 

A: Each rotary vacuum paddle dryer is specially designed for each customer according to specific wet material, capacity, drying temperature and heat mediums. Before we can work out a detailed proposal or quotation, we have to know the following information: 

1) Detailed information of wet material are you going to dry. We may ask you to provide composition report or samples to do drying test. 

2) Type of moisture. Water or organic solvents? 

3) Initial moisture content before drying

4) Required moisture content in dried product

5) Drying capacity in kg/h 

6) Heat medium to be used for drying. Such as steam, thermal oil or hot water 

Q: How the machine is delivered ? 

A: Rotary vacuum paddle dryer is very heavy and its weight ranges from 3 tons to 50 tons. When the heating area is less than 60 M2, the dryer body can be shipped by 40 feet HQ container; 60-100 M2 can be shipped by 40 feet OT container; more than 100 M2, the dryer body should be dismantled for shipping. 

Q: What kind of after sale service you can provide? 

A: We have professional after sale service team who can reach you in short notice. They can supervise the installation, do commissioning and train your workers.