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Control method for polyester melt conveying pressure and system thereof

A polyester melt and conveying pressure technology, which is applied in electric fluid pressure control, feeding solution to the spinneret, etc., can solve the problems of polyester melt conveying pressure fluctuations, achieve stable melt pressure control, avoid The effect of unstable melt delivery pressure and easy operation

Active Publication Date: 2009-07-15
JIANGSU HENGLI CHEM FIBER
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Problems solved by technology

The invention solves the problem of pressure fluctuation of polyester melt conveying in direct spinning of polyester melt, and makes up for the deficiency that the prior art can only be controlled manually

Method used

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  • Control method for polyester melt conveying pressure and system thereof

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Embodiment Construction

[0028] The present invention will be further described below in combination with specific embodiments. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0029] Such as figure 1 Shown, is the control method of a kind of polyester melt conveying pressure of the present invention, and polyester melt pressure control is divided into polyester melt discharge pump flow control, final polymerization melt filter pressure control, melt discharge There are five control links of material pump speed control, granulator flow control and granulator speed control. The polyester melt d...

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Abstract

The invention relates to a polyester melt delivery pressure control method and a system thereof, in particular to a polyester melt delivery pressure control method and a system thereof in polyester melt direct spinning. The polyester melt pressure control is divided into five control links which are polyester melt discharging pump flow control, final polyester melt filter back pressure control, melt discharging pump speed control, dicing cutter flow control and dicing cutter speed control, the polyester melt discharging pump flow control, the final polyester melt filter back pressure control and the dicing cutter flow control are controlled by a cascade control loop consisting of a main loop and a minor loop, the melt discharging pump speed control is controlled by a melt discharging pump speed PID control module 4 and a melt discharging pump speed PID control module 5 respectively, and the dicing cutter speed control is controlled by a dicing cutter speed PID control module 10 and a dicing cutter speed PID control module 13 respectively. The control method and the system thereof solve the problem of polyester melt delivery pressure fluctuation in the polyester melt direct spinning, and make up the deficiency that the prior art can only perform manual control.

Description

technical field [0001] The invention relates to a method and system for controlling the conveying pressure of polyester melt, in particular to a method and system for controlling the conveying pressure of polyester melt in direct spinning of polyester melt. Background technique [0002] At present, in the production of polyester direct spinning, most manufacturers use manual control to control the melt delivery pressure, or directly use the pressure after the final melt filter to directly control the opening of the melt distribution valve to control the melt delivery pressure. The pressure of the ester melt. However, when the spinning process, polyester production load changes or the production system is abnormal, it is often because the operator has no time to manually adjust or the melt pressure has not had time to adjust the opening of the melt distribution valve, and the system may be caused by excessive melt pressure. High or insufficient melt supply causes the shutdow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D1/09G05D16/20
Inventor 屈胜文丁建中雷鸣蒋丽波
Owner JIANGSU HENGLI CHEM FIBER
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