Rope Fabric Dyeing Bath Recirculation for Uniform Chemical Mixing

The patent applies preliminary action by introducing and mixing chemical products with the bath in an external mixing tank before the bath enters the autoclave. This pre-mixing ensures uniform distribution of chemicals throughout the bath, preventing localized concentration when the bath contacts the fabric, thereby resolving the contradiction between achieving sufficient chemical concentration and maintaining uniform dyeing quality.

The patent introduces an external mixing tank as an intermediary between the chemical product introduction point and the autoclave. This intermediary allows for adequate mixing volume and time, achieving both sufficient dilution ratio and uniform distribution of chemicals. The mixing tank serves as a mediator that reconciles the need for both high dilution and uniformity, preventing the trade-off present in direct introduction methods.

The patent employs self-service by using the main circulating pump to draw bath from the autoclave outlet and return it to the mixing tank, creating a self-sustaining circulation system. This allows for continuous mixing and recirculation of a controlled volume of bath without requiring excessive bath volume. The system efficiently achieves uniform dilution through controlled circulation rather than relying on large static bath volumes, thereby reducing energy consumption for heating large quantities of water.

The patent extracts the mixing function from the pump system by implementing an external mixing tank located outside the autoclave. This separates the product introduction and mixing operations from the fabric circulation system. By taking out the mixing operation, the patent eliminates the instability and imbalances caused by introducing products directly into the pump intake, while maintaining simple operation through the external mixing system.