In modern industrial production, the central feeding system often needs to supply multiple materials simultaneously, and it is crucial to avoid cross contamination of materials, which is related to product quality and production safety. Below, we will explain the methods of avoiding cross contamination in the central feeding system from three aspects: hardware, software, and operation management.

In terms of hardware design, the use of independent conveying pipelines is the foundation. Use dedicated pipelines for different materials to prevent mixing during transportation due to pipeline interconnection. For example, in the food processing industry, the pipelines for transporting different raw materials such as flour and sugar are strictly separated to ensure that the flavor and quality of the products are not affected. At the same time, a reasonable pipeline layout should be designed to reduce unnecessary bends and dead corners, minimize material residue, and reduce the risk of cross contamination from the source.

The selection and use of valves are also crucial. Valves with good sealing properties, such as butterfly valves, ball valves, etc., should be used. When switching materials, the valves should be tightly closed to prevent material leakage and mixing into other pipelines. In addition, regularly inspect and maintain valves, replace worn parts in a timely manner, and ensure their sealing performance.

In terms of software control, the central control system needs to accurately set the material conveying sequence and time. According to production needs, scientifically arrange the conveying time of each material to avoid conveying materials that may affect each other at the same time. For example, in chemical production, the transportation time of corrosive materials and ordinary materials should be staggered to prevent material flow caused by pressure fluctuations in the pipeline.

At the operational management level, it is essential to establish a strict cleaning system. Before and after each material switch, thoroughly clean the conveying pipelines, storage containers, etc. Compressed air blowing, vacuum suction and other methods can be used to remove residual materials. For materials that are prone to contamination, specialized cleaning agents can also be used for cleaning to ensure that the equipment has no material residue.

Provide professional training to operators to enhance their operational standards and awareness of cross contamination prevention. Familiarize them with the characteristics and operational requirements of different materials, strictly follow the operating procedures, and avoid cross contamination caused by human negligence.

The central feeding system can effectively avoid material cross contamination and provide stable and reliable material supply for production by optimizing hardware design, precise software control, and strict operation management when feeding multiple types of materials simultaneously, ensuring product quality and smooth production. In practical applications, enterprises should flexibly apply these methods based on their own production characteristics and material properties, continuously improve the operation and management of the central feeding system, in order to adapt to increasingly strict production requirements and quality standards.