Working Principle: 

GB Top-feed Scraper Roller Dryer (also called Drum Dryer) is continuous indirect-heated drying processor, which is commonly used for drying viscous liquids, slurries, heavy pastes, puree materials in food and chemical industry. Top feed drum dryer consists of  hot drum, drum drive system, applicator rollers, scraper blade, exhaust hood and screw conveyor. 

Raw material is pumped into the top feed pipe, which feeds the raw material onto the whole lenght of the hot drum. With the kneading effect of applicator rollers, raw material is spread onto the hot drum surface to form an uniform thin layer. Moisture evaporates very quicky and the drying process is finished within a single rotation of the drum. The dried product is scraped off by the blade and the vapor is sucked out by the draft fan. 

Technical Features: 

• The drying process only takes about 5-10 seconds within a single rotation of the drum, which is not only suitable for drying heat sensitive materials, but can also preserve the original taste and texture;
• Heat loss is mainly caused by heat radiation. Thermal efficiency can reach as high as 90%;
• Robust, simple and compact design requires minimum maintenance and small installation space; 
• The drum is made by alloy steel with high mechanical strength and the drum surface is hard chrome plated to futher increase the hardness. The max working pressure can be 10 bars; 
• The entire hot drum is installed in a stainless steel housing for safety and avoiding contamination;
• The drum rotation speed is adjustable via VFD to control the drying time;
• The heat medium can be steam, hot thermal oil or hot water. 

Technical Parameters:

Note: Our GB Scraper Roller Dryer is available in many sizes and configurations. The above models with typical design are indicative only. 

FAQ: 

Q: What information is needed in order to get a quote? 

A: Our Top-feed Roller Dryer is customized according to specific raw material, drying capacity, heating medium etc . The following information is needed to work out a detailed quote:

1) Raw material name, viscosity, flowability etc. Samples might be needed for trial production or drying tests. 

2) Moisture content before drying; target moisture content in dried product; 

3) Required drying capacity/input in kg/h;

4) Heating medium: steam, hot thermal oil, hot water etc. 

5) Suggested drying temperature 

6) Power supply type: 220V/380V/415V/440V, 50/60Hz, three phase 

Q: What is your normal lead time? 

A: All our machines are customized. The normal lead time is 40-50 days after receiving the advance payment.

Q: How the machine is packed?

A: The machine is packed in standard plywood box; 

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

A: 1)  All our machines are fully tested before shipping. Detailed operation manual, which includes photos, installation & operation videos, layout drawings, electric drawings etc. is delivered with the machine. So the end-user can easily install and operate the machine. 

2) In response to cutomer's invitation, technicians can be sent to the end-user's workshop for installation, commissioning and training. 

3) Provide life-long technical consultation and favorable spare parts.