The soft and hard texture of wheat grains is a very important indicator for evaluating wheat processing quality and food quality. This index has a very close relationship with wheat breeding and trade prices. In addition, the hardness of wheat is also an important basis for the classification and pricing of wheat. Therefore, it is necessary to measure the hardness of wheat in agriculture. The method of determining the hardness of wheat includes keratinization, pressure, grinding, near-infrared, and the like. In addition, in recent years, the wheat hardness tester has also been developed. The wheat hardness tester can also be divided into a digital display type and a pointer type, which is one of the grain hardness testers. In actual production, we need to make appropriate choices based on the type of sample.
The milling quality of wheat is closely related to the grain hardness. The hardness of wheat is inextricably linked with many aspects of the wheat milling process. For example, the quantity and quality of products, work efficiency of each equipment, flour output rate and flour quality, and processing power consumption are all related to the hardness of wheat. In the hard wheat endosperm, the starch granules are tightly bound to the protein matrix, and the hard wheat endosperm granules (slag) are difficult to be ground in the heart grinding system to achieve the particle size requirements, and the grinding consumes more energy, but the endosperm is easily separated from the bran. With high flour yield, low wheat bran stars, good color and low ash content, and most of the crushing breaks along the direction of the endosperm cell wall rather than through the cell contents, resulting in the formation of larger particles with a more regular shape and flow. Good quality, easy to sieve; soft wheat, on the contrary, the wheat flour particles are small and irregular, the surface is rough, the particle size distribution is small and there are more small particles, soft wheat flour and its milling material is more fluffy, compactness, flow Poor performance, which can easily result in clogging of powder channels and poor screening efficiency. The overall performance is that the total flour yield during soft wheat processing is reduced, the output is reduced, the total dynamic consumption is increased, and operation and management are more difficult.
Therefore, we usually determine the wheat milling process and the corresponding equipment technology through the hardness range of the raw wheat to be processed, and determine the milling process flow. Therefore, determining the wheat hardness of the sample with a wheat hardness tester in advance has important technology for timely adjustment of the milling process and corresponding technical parameters, determination of the wheat distribution plan, maintenance of the material balance of the process and production stability, and improvement of production efficiency. Guiding significance.
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