A method and device for treating and reusing waste water from on-line printing, dyeing and washing

A waste water treatment and waste water technology, applied in the direction of energy waste water treatment, adsorption water/sewage treatment, light water/sewage treatment, etc., can solve the high investment cost and operation cost of printing and dyeing waste water reuse technology, lack of printing and dyeing waste water regeneration and reuse Commercial planning, increased COD of washing wastewater and other issues, to achieve the effect of improving washing fastness, reducing water consumption and operating costs, and saving detergent

Active Publication Date: 2011-12-14
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] ② Lack of reuse water quality standards and reuse water quality components and the toxicity or potential toxicity of organic degradation products for the safety evaluation of recycled fabrics, resulting in low recognition of printing and dyeing enterprises and the public for the application of recycled water printing and dyeing processing
These difficult-to-remove substances will gradually accumulate in the process of printing and dyeing wastewater reuse due to different treatment and reuse processes. Cumulative Mathematical Models for Prediction
[0012] ④ The investment cost and operating cost of printing and d

Method used

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  • A method and device for treating and reusing waste water from on-line printing, dyeing and washing
  • A method and device for treating and reusing waste water from on-line printing, dyeing and washing
  • A method and device for treating and reusing waste water from on-line printing, dyeing and washing

Examples

Experimental program
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Effect test

Embodiment 1

[0064] Taking the effluent of the nylon fabric washing process as the treatment object (the pollutants are mainly weak acid dyes), the fabrics in each cylinder were washed 8 times after dyeing, each 10L, and each washing time was 10min, requiring a total of 80L of fresh tap water. See Table 1 for the effluent water quality indicators of Channel 1. Using the treatment process and device of the present invention, 10L of washing water in the first channel and 1L of pre-inflow water in the adsorption filtration device are used for online treatment and recycling, that is, the subsequent washing 7 channels are all carried out with the outlet water after adsorption and filtration. (That is, equivalent to the 8th washing water) See Table 1 for the water quality of the effluent after adsorption filtration. After continuous washing of 20 cylinders of fabrics, the adsorption and filtration device reaches the breakthrough point, and then the regenerated adsorption medium is eluted with th...

Embodiment 2

[0072] Taking the effluent of the acrylic fabric washing process as the treatment object (the pollutants are mainly basic dyes and cationic surfactants), the fabrics in each cylinder are washed 4 times after dyeing, each 10L, and each washing time is 10min, requiring fresh tap water The water volume is 40L in total, and the water quality indicators of the first channel are shown in Table 1. Using the treatment process and device of the present invention, 10L of washing water in the first channel and 1L of pre-inflow water in the adsorption and filtration device are used for online processing and recycling, that is, the subsequent washings are all carried out with the outlet water after adsorption and filtration. (That is, equivalent to the fourth washing water) The quality of the effluent after adsorption filtration is shown in Table 1. After continuous washing of 22 cylinders of fabrics, the adsorption and filtration device reaches the breakthrough point, and then the regener...

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Abstract

The invention relates to a method for on-line treatment and recycle of printing and dyeing washing waste water and a device thereof, and the method comprises the following steps: treating printing and dyeing washing waste water by an adsorption filtration device (3), recycling the treated water in a washing procedure (1) directly, allowing an adsorption medium to be adsorbed saturatedly, performing regeneration by a regeneration device; allowing the regenerated waste liquid and the waste water after backwashing to enter a superior oxidation area for further oxidation and degradation, discharging after the water reaches the standard. The device comprises a water inlet pipe and a water outlet pipe, and also comprises three parts of an adsorption filtration device (3), a regeneration device (2), and a superior oxidation device (4). The method of the invention has simple operation and management, low equipment investment and running cost, and is convenient for popularization and application; During the adsorption filtration process of the invention, no chemical reagent is needed to be added, and no secondary pollution is caused, and thus no additional effect on dyeing quality is caused; The invention is applicable to the on-line treatment and recycle of dyeing washing waste water of anionic or cationic water-soluble dyes such as active dyes, acid dyes, weak-acid dyes, basic dyes, etc.

Description

technical field [0001] The invention belongs to the field of industrial wastewater treatment, and in particular relates to a method and a device for treating and recycling online printing and dyeing washing wastewater. Background technique [0002] At present, China has become the country with the largest production scale in the world's textile printing and dyeing industry. Textile printing and dyeing enterprises are not only major local water users, but also major wastewater dischargers. In 2009, the national output of printing and dyeing cloth from January to December totaled 53.980 billion meters, and the water consumption per 100 meters of cloth, which generally reached the advanced level of national clean production, was 3m 3 Calculated, the total water consumption is 1.619 billion m 3 , which is equivalent to the total storage capacity of 157 West Lakes (the storage capacity of West Lake is about 10.3 million tons). In view of the continuous increase in water prices...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F1/42C02F1/72C02F1/32C02F1/78
CPCY02W10/37
Inventor 何瑾馨李春辉董霞
Owner DONGHUA UNIV
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