Washing device and process of PET (polyethylene terephthalate) liquid-phase tackifying kettle

A liquid phase thickening and cleaning device technology, applied in the field of polyester fiber production, can solve the problems of clean carbon deposition, uneven heating of the melt, affecting the viscosity increasing effect, etc., and achieves good heat transfer effect and heat transfer performance. The effect of reducing the amount of waste wire and unqualified wire and improving the melt quality

CN103567197AActive Publication Date: 2014-02-12ZHEJIANG GUXIANDAO POLYESTER DOPE DYED YARN CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2014-02-12

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Abstract

The invention relates to a washing device of a PET (polyethylene terephthalate) liquid-phase tackifying kettle and a washing process using the washing device for washing the tackifying kettle, and belongs to the technical field of polyester fiber production. The washing device comprises a segmented heater, a solvent injection pipe, a circulation pipe, a buffer tank, a condenser and a liquid seal tank, wherein the segmented heater is arranged in an outer wall jacket of the tackifying kettle; the solvent injection pipe is arranged at the top of the tackifying kettle; one end of the buffer tank is connected with the tackifying kettle through the circulation pipe, and the other end of the buffer tank is connected to the top of the condenser through a steam pipe; a circulative pipe is arranged at the bottom of the condenser and divided into two branch pipes, one branch pipe is connected to the bottom of the buffer tank, and the other branch pipe is connected to the bottom of the liquid seal tank; and the upper part of the liquid seal tank is connected to the top of the condenser, and control valves are arranged on two branch pipes of the circulative pipe respectively and used for controlling connection and disconnection of corresponding pipelines. The washing device has the advantages of high washing efficiency, low cost and the like.
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Description

technical field

[0001] The invention relates to a cleaning device for a PET liquid-phase thickening kettle and a cleaning process for cleaning the thickening kettle by using the cleaning device, and belongs to the technical field of polyester fiber production. Background technique

[0002] The production of polyester industrial filaments by liquid-phase viscosifying melt direct spinning is still a relatively new method. Its production process is substantially different from conventional chip spinning and liquid-phase viscosifying of ordinary fibers, and the equipment and processes are different. , so there is no reference. The liquid-phase viscosifying melt direct spinning of industrial yarn is through the melt entering and distributing from the top of the reactor, and under vacuum conditions, it flows down by gravity and self-weight to form a film. Among them, during the polycondensation reaction, the by-reaction products produced by the material reaction are separated fro...

Examples

Embodiment 1

[0032] The cleaning device of the PET liquid phase thickening still of the present invention, combines figure 1 , comprising a sectional heater 2 arranged in the outer wall jacket of the thickening kettle 1, a solvent injection pipe 3 arranged at the top of the thickening kettle 1, and a circulation pipe 6, a buffer tank 7, a condenser 10 and a liquid seal tank 14, One end of the buffer tank 7 is connected to the thickening tank 1 through the circulation pipe 6, and the other end is connected to the top of the condenser 10 through the steam pipe 9; the bottom of the condenser 10 is provided with a circulation pipe 5, and the circulation pipe 5 is divided into two branch pipes , that is branch pipe one 51 and branch pipe two 52, branch pipe one 51 is connected to the bottom of buffer tank 7, branch pipe two 52 is connected to the bottom of liquid seal tank 14; the top of liquid seal tank 14 is connected to the top of condenser 10, branch pipe one 51, branch pipe Control valve o...

Embodiment 2

[0040] The settings and workflow of this embodiment are the same as those of Embodiment 1, the difference is that: combined figure 2 , the circulation pipe is provided with a gas circulation pipe 6a and a liquid circulation pipe 6b, the pressure detector 4 is installed on the gas circulation pipe 6a, and the two pipes of gas and liquid carry out the transportation of the vapor solvent and the liquid solvent respectively, which improves the transportation efficiency.