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Chemical fiber dyeing process with ultra-low sewage discharge

A process and sewage technology, applied in the direction of dyeing, water/sewage treatment, flotation water/sewage treatment, etc., can solve the problems of environmental pollution and high COD of sewage, and achieve the effects of low cost, water quality improvement and strong dispersion ability.

Pending Publication Date: 2021-03-16
杭州众智纺织科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a chemical fiber dyeing process with ultra-low discharge of sewage. The process adopts a one-step-one-bath dyeing process, which is high in efficiency and low in cost, and the production wastewater can be treated by quality separation and Reuse, reduce the consumption of resource water, the total water consumption is reduced by 70-75% compared with the traditional process, the highest water recycling rate can reach 80%, realize ultra-low discharge of sewage, and solve the environmental pollution problem of excessive COD of sewage

Method used

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  • Chemical fiber dyeing process with ultra-low sewage discharge
  • Chemical fiber dyeing process with ultra-low sewage discharge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A chemical fiber dyeing process with ultra-low discharge of sewage, comprising the following steps:

[0032]Step 1. Dyeing: adopt one-step-one-bath dyeing process, the specific operation is: add dispersant SQ-1091.0g / L, leveling agent YDL-320 2.5g / L, HAC 1.0g / L, dye OWF dosage at room temperature 0.5%, degreasing agent 1.5g / L, then add polyester cheese, the single yarn weight of polyester cheese is 1.2kg, and the density is 0.42g / cm 3 , the process bath ratio is 1:2.5, then heat up to 70°C, hold for 5 minutes, continue to heat up to 110°C, hold for 8 minutes, continue to heat up to 130°C, and hold for 45 minutes;

[0033] Step 2. Post-treatment: The light-colored post-treatment process is as follows: add 0.8g / L acetic acid or acidic additives to adjust the pH value to 7, wash with hot water for 5 minutes, and the temperature is 80°C;

[0034] Step 3. Sewage separation and treatment: the cooling water in the heating process is directly recycled into the non-pressure con...

Embodiment 2

[0036] A chemical fiber dyeing process with ultra-low discharge of sewage, comprising the following steps:

[0037] Step 1. Dyeing: adopt one-step-one-bath dyeing process, the specific operation is: add 1.5g / L dispersant SQ-109, 1.0g / L leveling agent YDL-320, 1.2g / L HAC, and OWF dye at room temperature 3%, degreaser 1g / L, then add polyester cheese, the single yarn weight of polyester cheese is 1.4kg, and the density is 0.46g / cm 3 , the process bath ratio is 1:3.0, then heat up to 65°C, hold for 8 minutes, continue to heat up to 115°C, hold for 10 minutes, continue to heat up to 135°C, and hold for 30 minutes;

[0038] Step 2. Post-processing: The post-processing process for medium and dark colors is: add 2.5g / L acetic acid or acidic additives to adjust the pH value to 5.5, keep warm at 90°C for 10 minutes, wash and drain;

[0039] Step 3. Sewage separation and treatment: the cooling water in the heating process is directly recycled into the non-pressure container in the dyein...

Embodiment 3

[0041] A chemical fiber dyeing process with ultra-low discharge of sewage, comprising the following steps:

[0042] Step 1. Dyeing: adopt one-step-one-bath dyeing process, the specific operation is: add dispersant SQ-109 2.0g / L, leveling agent YDL-320 1.2g / L, HAC 1.5g / L, dye OWF dosage at room temperature 7%, degreaser 1.3g / L, then add polyester cheese, the single yarn weight of polyester cheese is 1.3kg, and the density is 0.45g / cm 3 , the process bath ratio is 1:2.6, then heat up to 68°C, hold for 7 minutes, continue to heat up to 112°C, hold for 9 minutes, continue to heat up to 132°C, and hold for 40 minutes;

[0043] Step 2. Post-processing: The post-processing process for dark colors is: including reduction cleaning and hot water cleaning. The specific operation is: add 2g / L sodium hydroxide and 2g / L sodium hydroxide, keep warm at 80°C for 10 minutes, and add 0.8g / L soaping agent, keep warm at 70°C for 10 minutes, add 2.5g / L acetic acid or acidic additives to adjust th...

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Abstract

The invention discloses a chemical fiber dyeing process with ultra-low sewage discharge, and belongs to an ultra-low discharge dyeing and finishing process. The chemical fiber dyeing process comprisesthree steps of dyeing, post-treatment and sewage quality-based treatment, adopts a one-step one-bath dyeing process, is high in efficiency and low in cost, realizes quality-based treatment and recycling of production wastewater, and reduces consumption of resource water; and the total water consumption is reduced by 70-75% compared with the traditional process, the highest water circulation utilization rate can reach 80%, ultra-low sewage discharge is realized, and the problem of environmental pollution caused by too high sewage COD is solved.

Description

technical field [0001] The invention belongs to an ultra-low emission dyeing and finishing process, in particular to a chemical fiber dyeing process with an ultra-low emission of sewage. Background technique [0002] The largest energy consumption of dyeing and finishing is water, and the water consumption of dyeing and finishing ranks among the top four in the industrial field; realizing water saving is actually the most direct method for each enterprise to improve efficiency, but some enterprises have no idea how to deal with and apply Well, it has always been a difficult problem. At present, most of them have achieved simple treatment of COD or heavy pollution index to meet the direct discharge of the second level or better, but the application is not meticulous, which will lead to the impact of quality problems. At present, the overall technical types of water treatment technology are: analysis of existing technology combination: biochemical + physical chemistry + membra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/44D06P1/00D06P1/96D06P3/52D06P5/04D06P5/02C02F9/04C02F103/30
CPCD06P1/445D06P1/0032D06P1/96D06P3/52D06P5/04D06P5/02C02F9/00C02F1/24C02F1/725C02F7/00C02F1/001C02F2103/30
Inventor 罗湘春
Owner 杭州众智纺织科技有限责任公司
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