In the soybean product processing industry, soybean dregs are a core byproduct generated during the production of tofu, soy milk, and dried bean curd. It consists of the protein, dietary fiber, and a small amount of fat remaining after soybean grinding and filtration. Approximately 0.6 tons of wet soybean dregs are produced for every ton of tofu produced. Fresh soybean dregs have a high moisture content of 75%-85%, are loose in texture, and easily perish. Directly piling them not only emits a sour odor and pollutes the environment but also wastes valuable nutrients such as protein—data shows that the crude protein content of fresh soybean dregs can reach 20%-25%, far exceeding that of ordinary straw-based feeds, making it a highly valuable feed ingredient.

Converting soybean dregs into high-quality feed hinges on solving the storage and processing challenges posed by its high moisture content. This process relies heavily on scientific drying. Traditional methods, such as natural sun-drying, are greatly affected by weather, easily leading to mold growth on rainy days; simple drying equipment suffers from uneven heating and significant nutrient loss, resulting in feed with poor palatability and a tendency to clump. A modern, standardized processing procedure has been established: First, fresh soybean residue is conveyed to a pretreatment device to remove impurities and break up clumps. Then, it is fed into a soybean residue dryer, where a combination of hot air circulation and drum agitation rapidly dehydrates the residue at a gentle temperature of 80-100℃, reducing its moisture content to a safe level of 12%-15%. Finally, after cooling and pulverizing, it can be directly processed into pelleted feed or mixed with corn, bran, etc., to form a mixed feed for pigs, cattle, sheep, and poultry. 

The soybean residue dryer plays an irreplaceable core role in this resource recovery process. Its primary value lies in "price preservation"—precise temperature control and uniform material turning design maximize the retention of nutrients such as protein and amino acids in soybean residue, achieving a crude protein retention rate of over 90% in the finished feed, far superior to the 60%-70% of traditional sun-drying. Secondly, it "improves efficiency"—an industrial-grade soybean residue dryer can process 1-10 tons of wet soybean residue per hour, with dehydration efficiency dozens of times that of natural sun-drying, and is unaffected by weather, enabling continuous production. More importantly, it "reduces loss"—the volume of dried soybean residue is reduced to one-third of its original size, facilitating storage and long-distance transportation, completely solving the solid waste treatment problem for soybean product companies, while providing a low-cost, high-nutrient feed source for the livestock industry, building a circular economy chain of "soybean product processing - solid waste treatment - livestock farming." For soybean product processing plants and feed production companies, a high-efficiency soybean residue dryer is the key equipment for transforming soybean residue from an "environmental burden" into "livestock gold."