ZJN - Brewery Grains/Starch Residues Drying Machine

• All Dryers Are Customized
• Engineers available to offer overseas service
• All Year Round After Sale Hotline
• Free Remote Technical Support and Train
• Warranty: 1 Year
• Certification: ISO9001

Brewery distiller`s Grains or starch dregs is the residues of rice, wheat or sorghum after vintage. It doesn’t only contain grains, but also rich crude protein, about 2-3 times higher than the corn content. Brewery distiller`s Grains or starch dregs also contains a variety of trace elements, vitamins, yeasts, lysine, methionine and tryptophan. However, the distiller`s grains water content is high, easy moldy and rotting, then polluting the environment. Dry lees can be supplied for animal feed industries, or for fish feeding. It will increase the added value of distillers and reduce environmental pollution.

Production of ethanol by the dry grinding process results in a primary co-product called dried distillers grains with solubles (DDGS). It is produced by blending and drying the non-fermentable residues in corn after fermentation of the starch, i.e., wet distillers grains (WDG) and condensed distillers solubles (CDS). After the fermented beer is distilled, the whole stillage containing the non-fermentable portions of corn grain is centrifuged to separate insoluble solids from liquids (thin stillage). The thin stillage is further condensed by removing water using evaporators to syrup known as condensed distillers solubles (CDS) which has about 35–40% solids content. The insoluble solids at about 65–70% moisture (wet basis) known as wet distillers grains (WDG) is mixed with CDS and dried in rotary drum dryers to produce DDGS.

The operational parameters of rotary dryers are usually controlled to result in a stable product within the moisture range of 10–13%. Due to the presence of high nutritive components such as protein, fat, minerals, vitamins and starch, DDGS is highly valued as a feed supplement. For the ethanol industry, shelf-life and other factors influencing transportation logistics of DDGS such as product flow and caking in storage and transport vessels are important to its marketability and economic viability.

ZJN drying equipment use hot air, triple stage and multi-loop drying process. It can dry above 80% water content beer dregs to below 15% moisture DDGS. In structure, there is a rotary harrow in first stage,which to break the sticky beer residues into small sizes and spread into drying room. Contacting with hot air directly, the sticky beer lees water content will be reduced instantly, the viscousity will be reduced soon. With the function multiple loop lifting boards and rotary cylinder, the beer dregs will form a thin material curtain, which increase the drying speed. In each drying stage, the hot air temperature and volume is different, the lifting and guiding boards are also different. It makes sure the distiller/starch dregs will be always dry under suitable drying environment. And keep the distiller proteins and the dried materials color in good condition. Thus the drying efficiency greatly improved and the heating is fully used and energy is saved. The whole process is work under negative pressure, uses sealing technology, it is very safe and clean.

This rotary drum dryer can also be used for alcohol dregs drying, wine lees drying, brewing sewage drying, brewery grains/starch residues drying etc.