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Cleaning method for supercritical carbon dioxide dyeing equipment

A technology of carbon dioxide and dyeing equipment, applied in chemical instruments and methods, detergent compositions, treatment of textile materials, etc., can solve the problems of poor color quality of dyed products, blockage of pipes, etc., and achieve non-corrosion, non-damage cleaning, comprehensive cost Low, environmentally significant effect

Active Publication Date: 2012-11-21
YANTAI TAYHO ADVANCED MATERIALS CO LTD
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  • Abstract
  • Description
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Problems solved by technology

[0004] Aiming at the above problems, the present invention provides a cleaning method for supercritical carbon dioxide dyeing equipment, which uses absolute ethanol, acetone solvent and supercritical fluid carbon dioxide to clean the equipment, and recovers the waste liquid after cleaning, and at the same time recovers carbon dioxide for use in Textile dyeing and cleaning again, realized the cleaning and maintenance of supercritical carbon dioxide dyeing equipment, and solved the problems of current supercritical carbon dioxide dyeing equipment pipeline blockage and poor color quality of dyed products after color change dyeing

Method used

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  • Cleaning method for supercritical carbon dioxide dyeing equipment

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Embodiment 1

[0021] The following is attachedfigure 1 Multivariate integrated supercritical carbon dioxide dyeing equipment describes the specific implementation mode of the present invention in detail. The cleaning process of the present invention mainly adopts three steps of first cleaning, second cleaning and flushing.

[0022] The first cleaning: first use the inner path to clean the dyeing system pipeline and kettle body, add absolute ethanol and acetone solvents from the dye kettle before circulating cleaning, among them, the volume ratio of supercritical carbon dioxide, absolute alcohol and acetone is 100 : 2:1 mixing; liquid carbon dioxide is stored in the circulation storage tank, the liquid carbon dioxide is pressurized to 17MPa by the high-pressure pump during work, and then the high-pressure liquid carbon dioxide is heated to 80°C through the heat exchanger, and the carbon dioxide is transformed into a supercritical state; Open the relevant control valve and circulation pump to...

Embodiment 2

[0027] The following is attached figure 1 Multivariate integrated supercritical carbon dioxide dyeing equipment describes the specific implementation mode of the present invention in detail. The cleaning process of the present invention mainly adopts three steps of first cleaning, second cleaning and flushing.

[0028] The first cleaning: Firstly, the internal circulation path is used to clean the dyeing system pipeline and kettle body. Before cleaning, absolute ethanol and acetone solvents are added from the dye kettle. Among them, supercritical carbon dioxide, absolute ethanol and acetone are 100% by volume. : 2:1 mixing; liquid carbon dioxide is stored in the circulation storage tank, the liquid carbon dioxide is pressurized to 15MPa by the high-pressure pump during work, and then the high-pressure liquid carbon dioxide is heated to 70°C through the heat exchanger, and the carbon dioxide is transformed into a supercritical state; Open the relevant control internal circulat...

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Abstract

The invention relates to a cleaning method for supercritical carbon dioxide dyeing equipment, which takes a mixture of supercritical carbon dioxide, anhydrous alcohol and acetone as a detergent; the equipment is cleaned at least 2 times at 70-110 DEG C and 15-20 MPa for at least 10 minutes every time. The cleaning method realizes non-corrosive and nondestructive cleaning of the existing supercritical carbon dioxide equipment. The cleaned supercritical carbon dioxide equipment is free from dye residuals, thereby being beneficial for realizing the diversity production of products. The cleaning method has the characteristics of low comprehensive cost and significant economic benefits and environment benefits, and is wide in application prospect.

Description

technical field [0001] The invention relates to cleaning of dyeing equipment used in the textile dyeing and finishing industry, more specifically, to a method for cleaning dyeing equipment using supercritical carbon dioxide fluid. Background technique [0002] Traditional textile dyeing mainly uses water as the medium. During the dyeing process, a large number of chemical substances such as dyes, auxiliaries and surfactants have caused serious pollution to the environment, and at the same time restricted the sustainable development of the textile printing and dyeing industry. In the 21st century, the requirements for various production and processing with low consumption and high technology, easy control, high efficiency, pollution-free and recyclability are becoming more and more prominent. The supercritical carbon dioxide anhydrous dyeing technology developed at the end of the last century is considered to be a "green and sustainable technology" because of its outstanding ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06B23/30C11D7/60C11D7/26C11D7/02
CPCD06B3/08D06B3/09D06B3/30D06B19/00D06B23/30
Inventor 郑来久郭友才杜冰姜涛高世会郑环达李松媛魏菊钱永芳
Owner YANTAI TAYHO ADVANCED MATERIALS CO LTD
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