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Method for treating high-concentration water-based ink waste liquid and dehydrating sludge in high-concentration water-based ink waste liquid

A water-based ink, sludge dewatering technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, dehydration/drying/concentrated sludge treatment, etc., to achieve continuous production treatment, high dehydration efficiency, and dehydration speed. quick effect

Active Publication Date: 2015-11-25
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The above inventions use microwaves to destroy sludge flocs to release sludge moisture to improve the dehydration effect, but the sludge still needs centrifugal dehydration or press dehydration, and the moisture content of the sludge is still about 75%.

Method used

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  • Method for treating high-concentration water-based ink waste liquid and dehydrating sludge in high-concentration water-based ink waste liquid

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Embodiment 1 refers to figure 1 .

[0027] The invention provides a method for the treatment of high-concentration water-based ink waste liquid and its sludge dehydration, and uses the method of acidifying the water-based ink waste liquid with inorganic acid to make the pollutants in the waste liquid change from hydrophilic to hydrophobic and form flocs . After microwave heating, the pollutants are aggregated, softened and shrunk, pressed, solidified and dehydrated to form a lumpy sludge. The invention realizes the integration of water-based ink waste liquid treatment and sludge dehydration, has fast dehydration speed and high dehydration efficiency, can reduce the moisture content of sludge to below 40%, and can be continuously produced and treated. For details, refer to the attached figure 1 To illustrate.

[0028] Collect the water-based ink waste liquid and pump it into the stirring reactor, then add inorganic acid to the waste liquid and stir the reaction, adju...

Embodiment 2

[0037] Collect the water-based ink waste liquid and pump it into the stirring reactor, then add inorganic acid to the waste liquid and stir to adjust the pH value of the waste liquid to be acidic, so that the pollutants are precipitated, and the sludge is made into a paste by continuous stirring; After entering the dehydration filter belt, it is heated by microwave and then squeezed for dehydration. The sludge is sprayed with water to cool the surface quickly; the sludge is released from the water and discharged for subsequent treatment. The dewatered sludge on the filter belt is removed and dried naturally.

[0038] The invention provides a method for treating high-concentration water-based ink waste liquid and its sludge dehydration, which mainly includes the following steps:

[0039] Step a. Mix black water-based ink waste (COD Cr : 432,000 mg / L; Chromaticity: 80,000 times) Collected in the ink storage tank, use a sewage pump to add to the stirring reactor, then add inorgan...

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Abstract

The invention discloses a method for treating high-concentration water-based ink waste liquid and dehydrating sludge in the high-concentration water-based ink waste liquid. The method is characterized by comprising the following steps: collecting the water-based ink waste liquid, pumping the collected water-based ink waste liquid into a reactor, then adding inorganic acid into the waste liquid, carrying out stirring and adjusting the pH value of the waste liquid until the waste liquid is acidic; allowing the sludge to enter and be located on a dehydration filter belt, heating the sludge with microwaves, carrying out squeezing and dehydration, and spraying water on the dehydrated sludge to rapidly cool the surface of the dehydrated sludge; and taking the sludge off the filter belt and discharging dehydration water into a subsequent waste water treating system. With the method provided by the invention, integrated removal of pollutants in the ink waste liquid and dehydration of the sludge is realized; the removal rate of the pollutants reaches more than 90%; a decolorization ratio is up to more than 99%; and the treated sludge has a water content of lower than 40%.

Description

technical field [0001] The invention belongs to the technical field of sewage and sludge treatment in environmental engineering, and in particular relates to a method for treating high-concentration water-based ink waste liquid and dewatering the sludge. Background technique [0002] Water-based ink is widely used in various fields because of its health, environmental protection and safety characteristics. For example, packaging materials and waterproof materials usually use water-based ink when printing, but when changing the printing color, it is necessary to clean the printing machine and the ink storage tank, resulting in a certain amount of high-concentration water-based ink waste. The water-based ink waste liquid contains a large amount of organic pollutants such as water-soluble polymer resins, hydrophilic pigments, and organic solvents, and the pollution is extremely serious (the chroma is more than 30,000 times, and the COD Cr The value is as high as 200,000-600,00...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F11/12
Inventor 柳荣展张宾曹书梅王炳石宝龙于德爽王顺
Owner QINGDAO UNIV
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