Soyabeans Processing Line China Factory

 Soyabeans Processing Line

Shijiazhuang Xinlu Technology Co., Ltd. – Detailed Analysis of a Modern Soyabeans Processing Line

A modern Soyabeans Processing Line is a complex integration of mechanical, thermal, and sometimes chemical operations designed to convert raw soybeans into a spectrum of valuable products. Shijiazhuang Xinlu Technology Co., Ltd. develops these lines with a focus on versatility, allowing processors to pivot between producing edible oils, high-protein meals for animal feed, and specialized ingredients for the food industry. The design philosophy centers on extraction efficiency, nutrient preservation, and operational reliability.

The journey of the soybean through the line starts with intake and preliminary preparation. Raw beans are cleaned using vibrating screens and destoners to remove foreign materials. The cleaned beans are then conditioned by adjusting their temperature and moisture content. This conditioning, often done with steam, makes the beans more pliable for the dehulling process. Dehulling is critical as it removes the fibrous hull, concentrating the protein and fat content in the final meal and oil. Cracking mills break the beans into smaller pieces, and the hulls are separated using aspirators and specific gravity separators.

The conditioned and dehulled bean fragments, known as meats, are then processed into flakes by passing them through heavy-duty flaking rolls. The objective is to create thin, uniform flakes that maximize surface area. This flaking step is pivotal for the efficiency of the subsequent solvent extraction process. In the extractor, the flakes are percolated with a food-grade solvent, which dissolves the soybean oil. The resulting mixture, called miscella, is distilled to separate the crude soybean oil from the solvent, which is recycled. The defatted flakes, now containing very little oil, are referred to as spent flakes or white flakes.

These white flakes form the base material for several product streams. For the production of soybean meal for animal feed, the flakes are subjected to toasting. This is a controlled heating and cooking process that uses direct steam and agitation. Toasting serves to destroy anti-nutritional factors present in raw soybeans, such as trypsin inhibitors and urease, making the protein highly digestible for livestock. The toasted flakes are then ground into meal of a specified particle size.

For human food ingredients, the white flakes can be processed further. To produce soy protein concentrate (SPC), the soluble carbohydrates are leached out from the flakes using aqueous alcohol or acid-washing techniques, increasing the protein content to around 65-70%. For the highest purity, soy protein isolate (SPI) is manufactured by extracting the protein into water at an alkaline pH, separating the insoluble fiber, and then precipitating the protein at its isoelectric point. The resulting protein curd is then neutralized, pasteurized, and spray-dried into a powder.

The finishing operations include the refining of the crude soybean oil through degumming, neutralization, bleaching, and deodorization to produce clear, odorless, and stable edible oil. All solid products—meal, concentrates, and isolates—are milled to specification and packaged. The entire line from Shijiazhuang Xinlu Technology Co., Ltd. is supported by process control systems for automation and quality consistency, and is built with durability to handle the continuous, high-tonnage nature of soybean processing.