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Recovery and separation kettle and recovery and separation method for supercritical CO2 dyeing gas-solid separation

A technology of gas-solid separation and separation method, which is applied in the direction of separation method, chemical instrument and method, solvent dyeing, etc. It can solve the problems of affecting dyeing effect, water separation, pollution, etc., and achieve the effect of improving purity and dryness

Active Publication Date: 2018-10-19
QINGDAO JIFA GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of recovery kettle has serious technical defects. Firstly, it is impossible to effectively separate the water in this way. Secondly, the dissolved dye dust will be brought back to the CO2 along with the airflow. 2 In the storage tank, the CO in the storage tank 2 Pollution will also affect the next dyeing effect

Method used

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  • Recovery and separation kettle and recovery and separation method for supercritical CO2 dyeing gas-solid separation
  • Recovery and separation kettle and recovery and separation method for supercritical CO2 dyeing gas-solid separation

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Supercritical CO using 5A grade molecular sieve 2 The recovery and separation kettle for dyeing gas-solid separation is a method for recovering and separating waste gas. This method uses supercritical CO 2 After anhydrous dyeing, the exhaust gas with a large amount of red disperse dyes, fabric impurities and moisture passes through the separation tank equipped with 5A grade molecular sieve 5, and the pressure of the gas suddenly drops from 20MPa to less than 7MPa. After the high-speed airflow passes through the lower layer of sponge 6, the airflow changes from one bundle to multiple bundles, and the speed will decrease sharply at the same time. In this layer, fabric impurities and moisture with large particle diameters will be trapped and isolated. Immediately afterwards, when the air flow enters the molecular sieve 5 with strong adsorption and large specific surface area, the dye and remaining moisture in the air flow will be fully absorbed by the molecular sieve 5 . ...

Embodiment 2

[0036] Supercritical CO using grade 4A molecular sieves 2 The recovery and separation kettle for dyeing gas-solid separation is a method for recovering and separating waste gas. This method uses supercritical CO 2 After anhydrous dyeing, the exhaust gas with a large amount of blue disperse dyes, fabric impurities and moisture passes through the separation tank equipped with 4A grade molecular sieve 5, and the pressure of the gas suddenly drops from 20MPa to less than 7MPa. After the high-speed airflow passes through the lower layer of sponge 6, the airflow changes from one bundle to multiple bundles, and the speed will decrease sharply at the same time. In this layer, fabric impurities and moisture with large particle diameters will be trapped and isolated. Immediately afterwards, when the air flow enters the molecular sieve 5 with strong adsorption and large specific surface area, the dye and remaining moisture in the air flow will be fully absorbed by the molecular sieve 5 ...

Embodiment 3

[0038] Supercritical CO using 3A grade molecular sieve 2 The recovery and separation kettle for dyeing gas-solid separation is a method for recovering and separating waste gas. This method uses supercritical CO 2 After anhydrous dyeing, the exhaust gas with a large amount of yellow disperse dyes, fabric impurities and moisture passes through the separation tank equipped with 3A grade molecular sieve 5, and the pressure of the gas suddenly drops from 20MPa to less than 6MPa. After the high-speed airflow passes through the lower layer of sponge 6, the airflow changes from one bundle to multiple bundles, and the speed will decrease sharply at the same time. In this layer, fabric impurities and moisture with large particle diameters will be trapped and isolated. Next, when the air flow enters the molecular sieve 5 with strong adsorption and large specific surface area, the dye and remaining moisture in the air flow will be fully absorbed by the molecular sieve. Afterwards, the p...

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Abstract

The invention provides a recovery and separation kettle for supercritical CO2 dyeing gas-solid separation and a recovery and separation method. The recovery and separation kettle is characterized in that a tank body of the recovery and separation kettle comprises a cylindrical casing, a top cover, a base plate and an inner separation cylinder, wherein the top cover is mounted at the upper end of the cylindrical casing; the inner separation cylinder is arranged in the cylindrical casing; the base plate is mounted at the lower end of the cylindrical casing; a lower sponge layer, a molecular sieve and an upper sponge layer are sequentially arranged in the inner separation cylinder from bottom to top; a pipe being introduced into a tank cavity is arranged in the center of the base plate; a pipe communicated with a condensing unit is arranged at the upper part of the cylindrical casing. According to the recovery and separation kettle and the recovery and separation method, gas mixed with a large quantity of dyes, impurities and water after supercritical CO2 waterless dyeing is guided into the recovery and separation kettle for purification and recovery, and the purity degree and the drying degree of recovered CO2 can be increased in a molecular sieve purification manner; besides, the molecular sieve can be recycled after treatment.

Description

technical field [0001] The invention belongs to the technical field of novel dyeing, and relates to a method for filtering with molecular sieves in supercritical CO 2 During the dyeing process, gas / solid separation of exhaust gas and CO 2 recycling, specifically a supercritical CO 2 A recovery separation kettle and a recovery separation method for dyeing gas-solid separation. Background technique [0002] In the traditional dyeing process, we usually use water as the main medium. A large number of chemical substances such as dyes and surfactants will have a negative impact on the sustainable development of the environment. In addition, neutralization, sedimentation and other treatments are required for the sewage discharged from dyeing, which requires a lot of manpower and material resources. According to incomplete statistics, the annual water consumption of my country's textile printing and dyeing industry reaches 1.7 billion tons, and the sewage discharge reaches 1.6 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06B9/02D06B9/06D06B23/20B01D53/02
CPCB01D53/02B01D2253/108B01D2253/116D06B9/02D06B9/06D06B23/20D06B19/00Y02C20/40Y02P70/62
Inventor 王健杨为东万刚刘崇波刘邵冰林大鹏
Owner QINGDAO JIFA GROUP
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