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Compound flocculant for treating printing and dyeing wastewater and preparation method of compound flocculant

A printing and dyeing wastewater, composite technology, applied in the fields of bleaching and dyeing, printing and dyeing, can solve problems such as no research reports, sulfur-containing gas pollution, atmospheric harm to the environment, etc., and achieve the effects of high decolorization rate, high removal rate and high economic value.

Active Publication Date: 2015-03-25
深圳市创飞格环保技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, slag is widely distributed in our country, but the utilization rate is far from the large amount of discharge. When it is disposed of and piled up, sulfur-containing gas will be released to pollute the atmosphere and endanger the environment.
[0008] At present, there is no relevant research report on the use of slag in the treatment of printing and dyeing wastewater.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A composite flocculant for treating printing and dyeing wastewater in this embodiment, its raw material formula is composed of the following components in parts by weight:

[0035] 20 parts of slag;

[0036] 15 parts of magnesium sulfate;

[0037] Polyacrylamide 6 parts.

[0038] In the above formula, the slag is the slag from a coal-fired thermal power plant.

[0039] In the above raw material formula, magnesium sulfate (MgSO 4 ) using commercially available products.

[0040] In the above raw material formula, polyacrylamide (PAM) is a commercially available product.

[0041] The above-mentioned preparation method of a composite flocculant for treating printing and dyeing wastewater comprises the following steps:

[0042] According to the formula dosage, put the slag into the sulfuric acid (H 2 SO 4 ) solution (the mass volume ratio g / mL of slag to 1.5mol / L sulfuric acid solution is 0.5:1), stir for 20 minutes and soak for 1 hour, then raise the temperature of ...

Embodiment 2

[0045] A composite flocculant for treating printing and dyeing wastewater, its raw material formula is composed of the following components by weight:

[0046] 25 parts of slag;

[0047] 12 parts of magnesium sulfate;

[0048] Polyacrylamide 8 parts.

[0049] In the above formula, the slag of the commercially available civil boilers in the northern region is used.

[0050] In the above raw material formula, magnesium sulfate (MgSO 4 ) using commercially available products.

[0051] In the above raw material formula, polyacrylamide (PAM) is a commercially available product.

[0052] The above-mentioned preparation method of a composite flocculant for treating printing and dyeing wastewater comprises the following steps:

[0053] According to the formula dosage, put the slag into the sulfuric acid (H 2 SO 4 ) solution (the mass volume ratio g / mL of slag to 1.5mol / L sulfuric acid solution is 0.5:1), stir for 20 minutes and soak for 1 hour, then raise the temperature of the...

Embodiment 3

[0056] A composite flocculant for processing printing and dyeing wastewater of the present embodiment, its raw material formula is composed of the following components in parts by weight:

[0057] 30 parts of slag;

[0058] 11 parts of magnesium sulfate;

[0059] Polyacrylamide 5 parts.

[0060] In the above formula, the slag of the coal-fired thermal power plant is used.

[0061] In the above-mentioned raw material formula, magnesium sulfate (MgSO 4 ) using commercially available products.

[0062] In the above raw material formula, polyacrylamide (PAM) adopts commercially available products.

[0063] The above-mentioned preparation method of a composite flocculant for treating printing and dyeing wastewater, comprising the following steps:

[0064] According to the formula dosage, first put the slag into sulfuric acid with a concentration of 1.5mol / L (H 2 SO 4 ) solution (the mass volume ratio g / mL of slag and 1.5mol / L sulfuric acid solution is 0.5:1), stir for 20 min...

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PUM

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Abstract

The invention discloses a composite flocculant for treating printing and dyeing wastewater and a preparation method thereof. The raw material formula of the composite flocculant consists of 20-30 parts of slag, 10-15 parts of magnesium sulfate and 5-30 parts by weight. 10 parts of polyacrylamide composition. The composite flocculant of the present invention is composed of slag mixed with magnesium sulfate and polyacrylamide, which has a good flocculation effect on printing and dyeing wastewater, the decolorization rate can reach 92%-95.8%, and the removal rate of CODcr is greater than 75%. The invention not only realizes waste recycling of slag, but also has simple preparation method, low raw material cost and high economic value.

Description

Technical field [0001] The present invention involves the field of printing and dyeing and bleaching and dyeing, especially in the field of wastewater treatment technology in printing and dyeing and bleaching, and specifically involves a composite flocculant and preparation method that can handle printing and dyeing wastewater. Background technique [0002] Water is necessary for human life. With the accelerated development of my country's industrialized urbanization, the problem of water pollution is getting worse, and the problem of water safety treatment has become a serious constraints for my country's economic and social sustainable development. [0003] Printing and dyeing and bleaching wastewater have the characteristics of high organic concentration, complex component and high chroma, and are one of the difficult organic wastewater for handling.According to statistics, the wastewater in the dyeing industry accounts for the fourth place in the national industrial wastewate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/56C02F103/30C02F1/52
Inventor 卢海燕张琰
Owner 深圳市创飞格环保技术有限公司