Unlock instant, AI-driven research and patent intelligence for your innovation.

Water washing method and system

A technology for washing and dyeing wastewater, applied in the field of textile printing and dyeing, can solve problems such as sewage pollution, and achieve the effects of saving steam, saving electricity, and reducing the cost of sewage treatment

Inactive Publication Date: 2019-12-27
高勋集团有限公司
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] After dyeing with conventional reactive dyes, generally 25-30% of the dye will remain in the wastewater. The traditional reactive dyeing process will discharge the wastewater directly, and then re-enter clean water, add soaping agents such as soap oil, and heat up to 95°C to clean the dyed matter. Remove the floating color remaining in the dye molecules of yarns, fabrics, etc. The sewage discharged from these processes causes serious pollution

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Water washing method and system
  • Water washing method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Taking 100kg of 32 pure cotton cheeses dyed black as an example, the weight of the dye is 12% of the cheese, the remaining 30% of the dye in the dyeing waste liquid, and the dyeing bath ratio is 1:6, that is, the remaining dye concentration n=12%* 30% / 6=0.006%. Dyeing wastewater volume V=100kg*6=600L. The coefficient k is determined to be 200 through experiments. The ozone concentration to be introduced is C=k*n=200*0.006%=1.2%, and the ozone quality M=C*V=1.2%*600L=7.2L. The time of ozone washing treatment is 25-30 minutes, and the temperature is 25°C. After ozone washing treatment, it is generally only necessary to use 1-2 cylinders of clean water to wash the package again to meet the quality requirements. A total of 600-1200L of clean water is required.

[0039] Under the same conditions, the traditional dyeing process needs to drain the waste liquid dye first, then re-introduce 600L of clean water, add soaping agent 30g / L=600L*5g=3kg, heat up at 80-90°C and soap f...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a water washing method. The method includes the steps of S1, online monitoring the concentration n of dye in dyeing wastewater in a dye vat after yarn or fabric is dyed by reactive dye and the volume V of the dyeing wastewater; S2, feeding ozone into the dyeing wastewater to allow the concentration of the ozone in the dyeing wastewater to be C, and using the concentration Cto calculate the mass M of the ozone fed into the dyeing wastewater, wherein C=k*n, M=C*V, and k is a coefficient. The invention further provides a water washing device. The method has the advantagesthat the ozone is fed into the wastewater obtained after reactive dyeing and containing residual dye to decompose the residual dye in an oxidative manner, pollution discharge is controlled from the source, and wastewater treatment cost is lowered.

Description

technical field [0001] The invention relates to the field of textile printing and dyeing, in particular to a method and device for washing yarn or fabric by using ozone. Background technique [0002] Printing and dyeing industry wastewater is a general term for the mixing of various wastewater discharged during the production process of printing and dyeing industry enterprises. The printing and dyeing industry wastewater is one of the largest dischargers of industrial wastewater. The wastewater in the printing and dyeing industry is generally organic wastewater with high pollutant concentration (COD) and deep color. The colors and pollutants contained in it are mainly composed of natural organic substances and synthetic organic substances, and the water quality varies widely. Therefore, When the COD is high, it can reach 2000-3000mg / L, and the ratio of BOD and COD is less than 0.2, the biodegradability is poor, and the pH value changes greatly. Due to the different processes...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): D06B3/04D06B3/10D06B23/28D06P1/38
CPCD06B3/04D06B3/10D06B23/28D06P1/38
Inventor 萧振林黎嘉球陈晓辉尚颂民胡恩岭
Owner 高勋集团有限公司