Automatic cooling process air regulation and control system for non-woven fabric production

Abstract

The invention belongs to the field of application of chemical fiber engineering air conditioners, and provides an automatic regulation and control system for process side blowing air for spinning cooling in a non-woven fabric production process. The regulation and control system comprises a DCS centralized control system, an actuating mechanism, a detection mechanism and an air conveying pipeline;and secondary constant air volume control is added to a side blowing window of an air terminal on the basis of original header pipe constant air pressure control. Closed-loop PID automatic regulationand control is achieved by detecting field process physical variable value in real time, comparing the field process physical variable value with a process parameter set target value, and performingfunction operation of a deviation ratio (P), integration (I) and differentiation (D). According to the system, the control precision of process air is improved, and a manual control mode and an automatic control mode are provided. Air volume low-limit and high-limit alarms are set, automatic control in a valve opening degree high-limit and low-limit interval is automatically set according to actual field conditions, and accuracy and reliability are achieved. A real-time trend curve is provided, so that tracking query and statistics are facilitated. Visual and effective data is provided for optimizing control parameters.

Description

technical field [0001] The invention relates to an automatic control system for cooling process air used in the production of nonwoven fabrics, which belongs to the application field of chemical fiber engineering air conditioners. Background technique [0002] During the cooling and drawing process of the primary fiber of the nonwoven fabric, the engineering air conditioner is used to regulate the process air. However, only the total air pressure is controlled, and each spinning position cannot be adjusted accurately in real time. And with the extension of the application period, there will be different degrees of blockage in the air duct and windshield. Although the wind pressure value is constant, the wind speed / air volume suffered by the tow changes, which cannot be effectively constant. The cooling effect of the tow is unstable and uneven, and the CV value of the monofilament quality coefficient of variation becomes large. It directly affects the stability and uniform...

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Problems solved by technology

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide an automatic control system for the cooling process air used in the production of nonwoven fabrics, so as to solve the problem that the wind speed / air volume of the tow can not be adjusted in real time and effectively in the background technology mentioned above.

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