Method for regenerating and recycling wool dyeing wastewater

Abstract

The invention relates to a method for regenerating and recycling wool dyeing wastewater. The method is mainly used for regeneration and recycling of dyeing wastewater in the dyeing process in the fur dyeing and finishing industry. The front-end treatment technical route of dyeing and finishing wastewater is that: industrial wastewater produced in the dyeing process in the dyeing and finishing production is collected and treated independently and is recycled in the process, a regeneration and recycling system is established, and the using amount of fresh water is saved. Dyeing wastewater is flocculated by using organic flocculant, and flocculate and filtrate are separated by screening and combination of material filtration and separation modes, and the filtrate is adsorbed by using adsorbent to ensure that the dyeing wastewater can meet the regeneration and recycling requirement. In a laboratory and a woolen mill, recycle water dyeing experiment is performed by using acid mordant dyes and lanaset dyes, and the one-time dyeing wastewater recycling rate is over 80 percent; and the color difference level of fresh water for dyes for two kinds of fur and a recycle water dyeing sample are both above level 4.

Description

technical field

[0001] The invention relates to a method for regeneration and recycling of wool dyeing wastewater, which can be mainly used for regeneration and recycling of dyeing wastewater in the wool dyeing process of the wool dyeing and finishing industry. Background technique

[0002] 80% of the water consumption in the textile industry is dyeing and finishing, and dyeing and finishing wastewater is seriously polluted and difficult to treat. In 2007, the output of printing and dyeing cloth in my country was 49.018 billion meters, and the total amount of wastewater was 2.3 to 3 billion t / a. Developed countries such as (Germany) produce only about 100 tons of fiber dyeing and finishing wastewater per ton (Germany), while in my country it is 250-400 tons. Not only the amount of wastewater is large, but also the pollution is heavy. In 2007, Beijing’s industrial energy consumption and water consumption guidance indicators (the first batch) stipulated that the water consump...

Examples

Embodiment 1

[0034] Embodiment 1: Prepare solution according to the method of content of the invention (1) and be acid mordant red S-80 dyestuff 0.2g, add sulfuric acid 1g, glacial acetic acid 1g, leveling agent 0.5g, penetrating agent 0.5g, use organic polymer flocculant Flocculate it, add 0.18g of flocculant and 0.035g of coagulant aid, dilute the total volume of the solution to 1000ml, stir at room temperature, and the dye removal rate after filtering through qualitative filter paper is 96.67%. The dye concentration in the filtrate is 6.7mg / L, pH: 5, dynamic adsorption with 120 mesh activated carbon at room temperature, flow rate: 12.8BV / h, treatment capacity is 538BV, and the removal rate of dye is further increased to 100%.

Embodiment 2

[0035]Embodiment 2: According to the method of the content of the invention (1), the solution is prepared as Lanner free red 2B dye 0.1g, add ammonium sulfate 1g, glacial acetic acid 1g, Abaig SET0.5g, Abaiger FFA0.5g, use organic high Molecular flocculant was used to flocculate it, adding 0.13g flocculant and 0.02g coagulant aid, the total volume of the solution was diluted to 1000ml, pH: 6, stirred at room temperature, and the dye removal rate was 98.42% after filtering through qualitative filter paper. The dye concentration in the filtrate is 1.6mg / L, and it is dynamically adsorbed by 120 mesh activated carbon at room temperature, the flow rate is 12.8BV / h, the treatment capacity is 321BV, and the removal rate of the dye is further increased to 100%.

Embodiment 3

[0037] Table 1 acid mordant dyeing prescription (bath ratio 1: 30)

[0038]

[0039] Acid mordant dyeing process:

[0040]

[0041] Table 2 Dyeing prescription of Lanna free and easy dye (bath ratio 1:30)

[0042]

[0043] Lanna free and easy dyeing process:

[0044]

[0045] According to the dyeing prescription and process of acid mordant dyes and Lanner free dyes, the wool fabric is dyed with acid mordant dyes and Lanner free dyes with deionized water as the medium. Collect dyeing wastewater, according to the method of embodiment 1 and 2, the dyeing wastewater collected is flocculated, separated and adsorbed, wherein the separation and adsorption conditions are the same as the content of the invention (3) and (4); then replace deionized water with dyed wastewater after treatment As the dyeing medium, dyeing with reused water is carried out according to the same dyeing prescription and process, and the results are shown in Table 3-Table 4:

[0046] Table 3 Dyei...

technical field

[0001] The invention relates to a method for regeneration and recycling of wool dyeing wastewater, which can be mainly used for regeneration and recycling of dyeing wastewater in the wool dyeing process of the wool dyeing and finishing industry. Background technique

[0002] 80% of the water consumption in the textile industry is dyeing and finishing, and dyeing and finishing wastewater is seriously polluted and difficult to treat. In 2007, the output of printing and dyeing cloth in my country was 49.018 billion meters, and the total amount of wastewater was 2.3 to 3 billion t / a. Developed countries such as (Germany) produce only about 100 tons of fiber dyeing and finishing wastewater per ton (Germany), while in my country it is 250-400 tons. Not only the amount of wastewater is large, but also the pollution is heavy. In 2007, Beijing’s industrial energy consumption and water consumption guidance indicators (the first batch) stipulated that the water consump...

Examples

Embodiment 1

[0034] Embodiment 1: Prepare solution according to the method of content of the invention (1) and be acid mordant red S-80 dyestuff 0.2g, add sulfuric acid 1g, glacial acetic acid 1g, leveling agent 0.5g, penetrating agent 0.5g, use organic polymer flocculant Flocculate it, add 0.18g of flocculant and 0.035g of coagulant aid, dilute the total volume of the solution to 1000ml, stir at room temperature, and the dye removal rate after filtering through qualitative filter paper is 96.67%. The dye concentration in the filtrate is 6.7mg / L, pH: 5, dynamic adsorption with 120 mesh activated carbon at room temperature, flow rate: 12.8BV / h, treatment capacity is 538BV, and the removal rate of dye is further increased to 100%.

Embodiment 2

[0035]Embodiment 2: According to the method of the content of the invention (1), the solution is prepared as Lanner free red 2B dye 0.1g, add ammonium sulfate 1g, glacial acetic acid 1g, Abaig SET0.5g, Abaiger FFA0.5g, use organic high Molecular flocculant was used to flocculate it, adding 0.13g flocculant and 0.02g coagulant aid, the total volume of the solution was diluted to 1000ml, pH: 6, stirred at room temperature, and the dye removal rate was 98.42% after filtering through qualitative filter paper. The dye concentration in the filtrate is 1.6mg / L, and it is dynamically adsorbed by 120 mesh activated carbon at room temperature, the flow rate is 12.8BV / h, the treatment capacity is 321BV, and the removal rate of the dye is further increased to 100%.

Embodiment 3

[0037] Table 1 acid mordant dyeing prescription (bath ratio 1: 30)

[0038]

[0039] Acid mordant dyeing process:

[0040]

[0041] Table 2 Dyeing prescription of Lanna free and easy dye (bath ratio 1:30)

[0042]

[0043] Lanna free and easy dyeing process:

[0044]

[0045] According to the dyeing prescription and process of acid mordant dyes and Lanner free dyes, the wool fabric is dyed with acid mordant dyes and Lanner free dyes with deionized water as the medium. Collect dyeing wastewater, according to the method of embodiment 1 and 2, the dyeing wastewater collected is flocculated, separated and adsorbed, wherein the separation and adsorption conditions are the same as the content of the invention (3) and (4); then replace deionized water with dyed wastewater after treatment As the dyeing medium, dyeing with reused water is carried out according to the same dyeing prescription and process, and the results are shown in Table 3-Table 4:

[0046] Table 3 Dyei...

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