Vacuuming device for pbt vacuum polymerization device
A vacuum device and polymerization device technology, applied in the field of PBT production equipment, can solve the problems of inability to maintain the vacuum degree of the reactor well, inability to absorb water vapor, lack of gas reflux, vacuum leakage, etc., to avoid material waste, The effect of avoiding failure and prolonging the service life
Active Publication Date: 2019-04-19
TAICANG RONGWEN SYNTHETIC FIBER
View PDF7 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] Both of the above two patents are unable to maintain the degree of vacuum that can be increased step by step in the reactor, cannot absorb water vapor, and do not have the function of preventing gas backflow and vacuum leakage in the case of abnormal sudden shutdown
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.
[0023] Examples of the described embodiments are shown in the drawings, wherein like or similar reference numerals designate like or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0024] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clock...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a vacuum-pumping device for a PBT (Polybutylene Terephthalate) vacuum polymerization device. The vacuum-pumping device comprises a vacuum tube, wherein the vacuum tube is connected with a vacuum pump; a water vapor collecting device and a gas back-streaming preventing device are arranged in sequence on the vacuum tube; one end of the vacuum tube is connected with a reaction kettle arranged on a frame body through a sealing flange; the vacuum tube is provided with a vacuum meter for displaying a vacuum degree in the reaction kettle; the vacuum tube behind the vacuum meter is provided with a main valve; the main valve is positioned in front of the water vapor collecting device. The vacuum degree in the reaction kettle is displayed through the vacuum meter, and an operator adjusts the vacuum degree in the reaction kettle according to an actual demand, so that the vacuum degree in the reaction kettle can be raised gradually; water vapor is absorbed through the water vapor collecting device, so that the vacuum pump is prevented from failing, and the service life of the vacuum pump is prolonged; the gas back-streaming preventing device has the function of preventing back streaming of gas and vacuum leakage under the condition of abnormal drop-dead halt, so that material waste is avoided.
Description
technical field [0001] The invention relates to the technical field of PBT production equipment, in particular to a vacuuming device for a PBT vacuum polymerization device. Background technique [0002] The molecular weight and yield of PBT polymerization products gradually increase, and it takes a long time to reach the end of the polymerization reaction. In order to avoid the material from being subjected to long-term high-temperature oxidation, the entire polymerization reaction process needs to be carried out under reduced pressure and nitrogen protection. In order to speed up the polycondensation reaction, it is necessary to gradually increase the degree of vacuum to remove the small molecular by-products, so that the reaction balance moves towards the direction of the polymer product. In the early stage of polymerization, the molecular weight of the polymer is low, the viscosity of the system is not high, and it is not difficult to stir, mix, heat transfer, and mass tr...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/78C08G63/183
CPCC08G63/183C08G63/785
Inventor 全潇
Owner TAICANG RONGWEN SYNTHETIC FIBER