After a long period of accumulation, the dyeing process has formed a relatively fixed process flow. However, with the different types of fabrics, dye types, and printing and dyeing requirements, the dyeing process is becoming more and more complex and refined. Simple manual processing is difficult to solve and low in efficiency. It can only rely solely on people's own experience. Dyeing vat is one of the main equipment for dyeing yarn and one of the main energy-consuming equipment. In today's situation of increasingly tight resources and increasingly fierce competition in the textile industry, reducing energy consumption means reducing enterprise production costs and increasing enterprise competitiveness. ; With the development of frequency conversion control technology, frequency conversion control of flow pressure difference has been widely used in the dyeing and finishing industry. The energy-saving transformation of dyeing vat with frequency conversion energy saving has also become the most effective way for dyeing and finishing industry to reduce the energy consumption cost of dyeing yarn and improve product competitiveness. Therefore, the application of AC frequency conversion speed control device on the dyeing vat is of great significance for reducing energy waste.

In the field of textile engineering, weaving and weaving are two completely different processes. Spinning is an early process of weaving. Twisting belongs to the later process of spinning. For spun yarns, twisting makes the fibers more tightly entangled, so that the yarn has certain physical and mechanical properties; for filaments, the purpose of twisting is to improve the processability of the weaving, and improve the anti-pilling and anti-pilling of textiles. Snaking and strong twist make the fabric unique. Twisting is the relative rotation of the two cross-sections of the yarn. At this time, the fibers originally parallel to the yarn axis in the yarn are inclined into a spiral. The amount of twisting of the yarn and the matching of the twist direction and twist of the yarn in the fabric have a greater impact on the appearance and performance of the product. The indexes of twisting properties are: the twisting degree, the twisting coefficient, and the twisting direction that indicates the twisting direction. The twist direction of the yarn has a great influence on the appearance and feel of the fabric. Using the twist direction of the warp and weft yarns to match the fabric weave can weave fabrics of different styles such as appearance and feel.

Paper machine is a big water consumer, including white water system, sewage system, sealed water system, sprinkler system, clean water system, etc. Normally, it needs to use pipe network constant pressure water supply, but traditional pressure control is through bypass and The control valve is used, and the frequency converter is rarely used. However, due to the general lack of water resources in China, the application of frequency converters will save 10% of water and 30% of energy, which will inevitably reduce the daily operating costs of paper mills.