Impact of Dryer Fabric Contamination and Cleaning Methods

In the vast and complex paper making industry, the dryer section is a crucial link, and the dryer fabrics are its core component. The performance and cleanliness of the dryer fabrics directly impact paper quality, production efficiency, and the stability of the entire paper making process. It is a key factor in improving production efficiency, reducing costs, and enhancing product quality for paper makers.

The Role of the Dryer Fabric in the Paper Machine Dryer Section

The primary function of the paper making dryer section is to reduce the moisture content of paper by evaporating water, bringing it to the specified dryness. The dryer fabrics plays the important role of supporting and transporting the paper in this process. It must possess excellent air permeability, strength, and stability to ensure uniform heating and dryer of the paper during the dryer process, preventing quality issues such as deformation and cracking. Furthermore, the performance of the dryer fabrics plays an essential role in maintaining stable operation of the dryer section, reducing downtime, and improving production efficiency.

Sources of Dryer Fabric Contamination in Paper Making

First and foremost is fiber debris. During the paper forming and conveying process, some fibers shed and adhere to the dryer fabrics. Over time, the accumulation of this fiber debris clogs the pores of the dryer fabrics, reducing its air permeability and affecting drying efficiency.

The second major concern is oil contamination. Oil from the lubrication systems and transmission components of paper making equipment can contaminate the dryer fabrics. This not only affects the paper’s appearance but also reduces the fabric’s hydrophilicity, preventing water from effectively penetrating the fabric and resulting in uneven drying.

The production of coated and coated paper, for example, involves a large amount of adhesives and resins. These resins easily melt and penetrate the fabric’s interstices during high-temperature drying.

How to Clean Dryer Fabric in Paper Machine?

Dryer fabrics can be cleaned using a variety of methods, including high-temperature, high-pressure cleaning, combined high-pressure water and compressed air/steam cleaning, and chemical cleaning. When using chemicals to clean dryer fabrics, ensure that they are flushed with large amounts of low-pressure water. Due to the wide variety of impurities present on dryer fabrics, the most effective method is currently high-temperature, high-pressure cleaning. Combining high-pressure water with compressed air/steam provides the highest cleaning quality, but is more expensive. Other methods can only effectively remove specific impurities, but not all.

High-temperature Cleaning Method for Dryer Fabric

Also, there are two methods for high-temperature cleaning of dryer fabrics: manual handheld high-pressure spray guns and the use of a cleaning stand with high-pressure spray heads arranged in a full-range configuration.

• Manual cleaning is not effective, labor-intensive, and has poor cleaning continuity, but it is low-cost and easy to operate, and is often used in small paper mills.
• The cleaning bracket uses high-pressure cleaning nozzles arranged in all directions. This method has a better cleaning effect and high efficiency, and can clean the dryer fabrics in a short time. This method can be used for continuous or intermittent cleaning without dead angles during the production process, with stable and reliable efficiency, and maintains the ideal air permeability required for the dryer fabrics.