On-line detection device for process liquid parameters of batch dyeing machine

Abstract

The invention relates to an online detection apparatus for intermittent dyeing machine process liquid parameters, comprising a process liquid sampling unit, a sample cooling unit, a sample detection unit and a control and data processing unit; the process liquid sampling unit comprises a sampling tube and a return sample tube, one end of the sampling tube is communicated with both a second communicating tube and a circulating pipe outlet, one end of the return sample tube is communicated with both the other end of a first communicating tube and a circulating pump inlet, the sample cooling unit comprises a first temperature detector and a cooling mechanism, the other end of the sampling tube is communicated with a liquid inlet of the cooling mechanism, the other end of the return sample tube is communicated with a liquid outlet of the cooling mechanism, a first temperature detector is arranged on a line of the sampling tube, the sample detection unit comprises a PH sensor and a second temperature detector arranged on a line of the return sample tube; the first temperature detector, the PH sensor and the second temperature detector are respectively and electrically connected to the data processing unit. The apparatus of the invention can measure and control process parameters of a process liquid continuously online.

Description

technical field [0001] The invention belongs to the technical field of textile dyeing and finishing, and relates to an online continuous measurement and control device for process liquid parameters, in particular to an online detection device for process liquid parameters of an intermittent dyeing machine. Background technique [0002] In the production of textile dyeing and finishing batch dyeing machines, the PH value (pH value), chroma, turbidity and ion concentration of the process liquid will not only affect the hue of the fabric, but also greatly affect the final absorption state of the dye. [0003] When the temperature of the process liquid changes during the production process of the intermittent dyeing machine or the application of additives is improperly used, the pH value of the process liquid will change significantly. The dyeing result of the exact same dye formula, such as a pH value fluctuation of 0.7PH It is not the same, which affects the shade and dyeing r...

AI Technical Summary

Problems solved by technology

[0003] When the temperature of the process liquid changes during the production process of the intermittent dyeing machine or the application of additives is improperly used, the pH value of the process liquid will change significantly. The dyeing result of the exact same dye formula, such as a pH value fluctuation of 0.7PH It is not the same, which affects the shade and dyeing rate of the fabric; at the same time, the chroma and turbidity value of the process liquid will also affect the whiteness of the bleached fabric, especially the difference between the inner and outer layers of the package yarn, and the vividness of bright and bright colors. The ion concentration of the process liquid will not only affect the brightness of the fabric, but also affect the bleaching effect of the fabric, as well as uneven dyeing, poor fabric feel, yellowing of the fabric, and it will cause fouling of the heat exchanger and energy loss Therefore, the process parameters of the process liquid are extremely important to the dyeing of fabrics, and these factors will cause the inability to achieve "level dyeing", poor "reproducibility" of the dyeing process, and high energy consumption of equipment, so intermittent dyeing The detection and control of process parameters such as pH value, chromaticity, turbidity and ion concentration in machine production are very important

[0004] At present, it is generally impossible to sample the process liquid online to measure pH, chroma, turbidity and ion concentration during the production process of the batch dyeing machine. PH value, chromaticity, turbidity and ion concentration are detected by corresponding instruments internally, prepared and processed to meet the process requirements

But this is off-line detection, without real-time performance, and cannot reflect the parameters of the process liquid under the immediate process conditions. During the dyeing production process, it is impossible to add acid-releasing additives in time to further stabilize the pH value and ensure the dyeing quality; The process cannot determine whether to increase the intensity of the washing process to ensure that the chroma and ion concentration meet the process requirements

Therefore, the pH value, chroma, turbidity and ion concentration of the process liquid cannot be detected online in time, the fabric dyeing quality cannot be guaranteed, and the product grade cannot be improved.

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