CN106365349B - Method for extracting and utilizing high-concentration black printing waste liquid pollutants - Google Patents

Method for extracting and utilizing high-concentration black printing waste liquid pollutants Download PDF

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Publication number
CN106365349B
CN106365349B CN201610904367.5A CN201610904367A CN106365349B CN 106365349 B CN106365349 B CN 106365349B CN 201610904367 A CN201610904367 A CN 201610904367A CN 106365349 B CN106365349 B CN 106365349B
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sludge
waste liquid
stirring
water
particles
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CN106365349A (en
Inventor
柳荣展
邹译慧
张宾
郝龙云
石宝龙
于梦楠
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Qingdao University
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/24—Treatment of water, waste water, or sewage by flotation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C02F2101/308—Dyes; Colorants; Fluorescent agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/16—Regeneration of sorbents, filters

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)

Abstract

The invention discloses a method for extracting and utilizing high-concentration black printing waste liquid pollutants, which is characterized by comprising the following steps of: acidifying the high-concentration black water-based ink printing waste liquid, and stirring to condense pollutants to form sludge; adding calcium mineral powder into the sludge, stirring uniformly, heating the sludge to 50-90 ℃ while stirring for dehydration, solidifying the sludge into blocks, and discharging dehydrated water; taking out the sludge, hot-pressing until the water content of the sludge is lower than 40%, and drying; heating the dried sludge to 400-700 ℃ in an air-isolated manner, and preserving the heat for 1-4 h; cooling the sludge to below 50 ℃, crushing the sludge into granules, spraying a wetting agent solution, and uniformly mixing; adding the sludge particles into the cationic dye dyeing wastewater, stirring for 10-120min, precipitating or filtering to remove the sludge particles, and discharging the decolorized wastewater; the sludge particles are recycled and regenerated for recycling. The method realizes the extraction of high-concentration black water-based ink printing waste liquid pollutants and the resource utilization of solid waste, and can ensure that the decolorizing rate of cationic dye dyeing waste water is close to 100 percent.

Description

Method for extracting and utilizing high-concentration black printing waste liquid pollutants
Technical Field
The invention belongs to the technical field of printing and dyeing industry, and particularly relates to a method for extracting and utilizing high-concentration black water-based ink printing waste liquid pollutants.
Background
The ink is composed of pigment, binder, filler and additive, and can be divided into oil ink and water-based ink. The oil-based ink contains a large amount of organic solvents, is seriously polluted and is gradually eliminated. The water-based ink mainly comprises water-soluble resin, pigment, alcohol, amine or ammonia and other additives and water. Water-based inkBecause of its health, environmental protection and safety characteristics, it is widely used in various fields. At present, a large amount of plastic packaging materials are printed and printed by adopting water-based ink more and more, printing equipment and a water-based ink storage tank need to be cleaned when the color is changed, and a certain amount of high-concentration water-based ink printing waste liquid is generated. The waste printing liquid contains pigment, water soluble acrylic resin, alcohol, amine and other pollutant, and has high organic matter content, high chroma and serious pollution (chroma over 3 ten thousand times, COD)Cr: 10 ten thousand to 50 ten thousand mg/L) are difficult to handle.
For the treatment of the waste liquid, a chemical method such as coagulation method is usually adopted for pretreatment, i.e. coagulant is added into the waste liquid to coagulate the pollutants into sludge, solid-liquid separation is carried out by a solid-liquid separation method such as mechanical dehydration by a plate-and-frame rolling filter, a belt dehydrator or a centrifugal dehydrator, etc., and the effluent is treated by other chemical or biological methods until reaching the discharge standard. Because the concentration of pollutants in the waste liquid is high, the solid content of the formed sludge is as high as 5-10 percent, the sludge is difficult to dehydrate, and a mud cake formed after mechanical filter pressing or centrifugal dehydration is generally used as solid waste for landfill treatment, so that secondary pollution is easily caused, and resource utilization can not be realized.
Disclosure of Invention
The invention aims to provide a method for extracting and utilizing high-concentration black water-based ink printing waste liquid pollutants.
In order to achieve the purpose, the technical method comprises the following steps:
acidifying the high-concentration black water-based ink printing waste liquid, and stirring to enable pollutants to be coagulated into pasty sludge; adding 5-10g/L of 100-mesh 500-mesh calcium ore powder into the sludge, uniformly stirring, heating the sludge to 50-90 ℃ while stirring for dehydration, solidifying the sludge into blocks, and discharging dehydrated water; taking out the sludge, performing hot pressing until the water content is lower than 40%, and pre-drying; heating the pre-dried sludge to 400-700 ℃ in an air-isolated manner, and preserving the heat for 1-4 h; cooling the sludge to below 50 ℃, crushing the sludge into particles, spraying a mist wetting agent solution with the mass concentration of 0.1-0.2%, and uniformly mixing; adding sludge particles into cationic dye dyeing wastewater according to the dosage of 2-10g/L wastewater, aerating and stirring for 10-120min, precipitating or filtering to remove sludge particles, and discharging decolored wastewater; recycling the sludge particles for thermal regeneration at 400-700 ℃ for recycling.
Has the advantages that:
a. the high-concentration black water-based ink printing waste liquid is treated by the method, the waste liquid decolorization rate is up to more than 99.5 percent, and the COD isCrThe removal rate reaches more than 80 percent, and the extraction rate of organic pollutants reaches more than 90 percent. The sludge dehydration rate reaches more than 90 percent, the volume reduction is more than 90 percent, and the deep dehydration of the sludge is realized;
b. the extracted pollutants are treated by the method and used for decolorizing the cationic dye dyeing wastewater, the wastewater decolorization rate is close to 100 percent, the resource utilization of solid waste is realized, and the problem of secondary pollution of sludge is avoided.
Detailed Description
The invention is further illustrated by the following specific examples.
Example 1
Slowly adding 92% concentrated sulfuric acid into high-concentration black water-based ink printing waste liquid with COD of 39.2 ten thousand mg/L, and stirring to enable pollutants to be coagulated to form sludge; adding 8g/L of 200-mesh 500-mesh calcium mineral powder into the sludge, uniformly stirring, heating the sludge to 75 ℃ while stirring for dehydration, solidifying the sludge into blocks, and discharging dehydrated water; taking out the sludge, hot-pressing the sludge until the water content is lower than 40%, and drying the sludge; heating the dried sludge to 500 ℃ in an air-isolated manner, and keeping the temperature for 2 h; cooling the sludge to below 50 ℃, crushing the sludge into particles, spraying a mist wetting agent solution with the mass concentration of 0.1%, and uniformly mixing; adding sludge particles into the yellow cationic dye dyeing wastewater according to the wastewater dosage of 5g/L, aerating and stirring for 100min, removing the sludge particles by precipitation, discharging decolorization wastewater, wherein the decolorization rate of the yellow cationic dye dyeing wastewater reaches more than 99.5%; the sludge particles are recycled and regenerated at 500 ℃ for recycling.
By adopting the method, the extraction and utilization of high-concentration black water-based ink printing waste liquid pollutants are realized, secondary pollution is avoided, the decolorization rate of yellow cationic dye dyeing waste water reaches more than 99.5 percent, and a new way for recycling solid waste is developed.
Example 2
Slowly adding organic acid into high-concentration black water-based ink printing waste liquid with COD of 16.8 ten thousand mg/L, and stirring to enable pollutants to be coagulated to form sludge; adding 5g/L of 200-mesh 500-mesh calcium mineral powder into the sludge, uniformly stirring, heating the sludge to 80 ℃ while stirring for dehydration, solidifying the sludge into blocks, and discharging dehydrated water; taking out the sludge, hot-pressing the sludge until the water content is lower than 40%, and drying the sludge; heating the dried sludge to 500 ℃ in an air-isolated manner, and preserving heat for 3 h; cooling the sludge to below 50 ℃, crushing the sludge into particles, spraying a mist wetting agent solution with the mass concentration of 0.05 percent, and uniformly mixing; adding sludge particles into black cationic dye dyeing wastewater according to the wastewater dosage of 6g/L, aerating and stirring for 60min, removing the sludge particles by precipitation, discharging decolorization wastewater, wherein the decolorization rate of the black cationic dye dyeing wastewater reaches more than 99.9%; the sludge particles are recycled and regenerated at 550 ℃ for recycling.
By adopting the method, the extraction and utilization of high-concentration black water-based ink printing waste liquid pollutants are realized, secondary pollution is avoided, the decoloring rate of black cationic dye dyeing waste water reaches nearly 100%, and a new way for recycling solid waste is developed.
Example 3
Slowly adding 92% concentrated sulfuric acid into high-concentration black water-based ink printing waste liquid with COD of 44.6 ten thousand mg/L, and stirring to enable pollutants to be coagulated to form sludge; adding 10g/L of 200-mesh 500-mesh calcium mineral powder into the sludge, uniformly stirring, heating the sludge to 75 ℃ while stirring for dehydration, solidifying the sludge into blocks, and discharging dehydrated water; taking out the sludge, hot-pressing the sludge until the water content is lower than 40%, and drying the sludge; heating the dried sludge to 500 ℃ in an air-isolated manner, and keeping the temperature for 2 h; cooling the sludge to below 50 ℃, crushing the sludge into particles, spraying a mist wetting agent solution with the mass concentration of 0.1%, and uniformly mixing; adding sludge particles into the mixed cationic dye dyeing wastewater according to the dosage of 10g/L wastewater, aerating and stirring for 60min, removing the sludge particles by precipitation, discharging decolorization wastewater, wherein the decolorization rate of the mixed cationic dye dyeing wastewater reaches more than 99.5%; the sludge particles are recycled and regenerated at 500 ℃ for recycling.
Adding sludge particles which are recycled for 10 times into blue cationic dye dyeing wastewater according to the wastewater dosage of 8g/L, aerating and stirring for 30min, removing the sludge particles by precipitation, discharging decolored wastewater, wherein the decolored rate of the blue cationic dye dyeing wastewater reaches more than 99.7%; the sludge particles are recycled and regenerated at 500 ℃ for recycling.
By adopting the method, the extraction and utilization of high-concentration black water-based ink printing waste liquid pollutants are realized, secondary pollution is avoided, the decoloring rates of the mixed cationic dye dyeing waste water and the blue cationic dye dyeing waste water are both up to more than 99.5%, and a new way for recycling solid waste is developed.
Example 4
Adding the regenerated sludge particles which are recycled for 50 times into the mixed cationic dye dyeing wastewater according to the wastewater dosage of 10g/L, aerating and stirring for 60min, removing the sludge particles by precipitation, discharging the decolored wastewater, wherein the decolored rate of the mixed cationic dye dyeing wastewater reaches more than 99.6%; the sludge particles are recycled and regenerated at 500 ℃ for recycling.
By adopting the method, the extraction and utilization of high-concentration black water-based ink printing waste liquid pollutants are realized, secondary pollution is avoided, the decoloration rate of the mixed cationic dye dyeing waste water reaches more than 99.6 percent, and a new way for recycling solid waste is developed.

Claims (2)

1. A method for extracting and utilizing high-concentration black water-based ink printing waste liquid pollutants is characterized by comprising the following steps of:
acidifying the high-concentration black water-based ink printing waste liquid, and stirring to enable pollutants to be coagulated into pasty sludge;
adding 5-10g/L of 100-mesh 500-mesh calcium ore powder into the sludge, uniformly stirring, heating the pasty sludge to 75-90 ℃ while stirring for dehydration, solidifying the sludge into blocks, and discharging dehydrated water;
taking out the sludge, hot-pressing until the water content of the sludge is lower than 40%, and drying;
heating the dried sludge to 400-700 ℃ in an air-isolated manner, and preserving the heat for 1-4 h;
cooling the sludge to below 50 ℃, crushing the sludge into particles, spraying a mist wetting agent solution with the mass concentration of 0.1-0.2%, and uniformly mixing;
adding sludge particles into cationic dye dyeing wastewater according to the dosage of 2-10g/L wastewater, aerating and stirring for 10-120min, precipitating or filtering to remove sludge particles, and discharging decolored wastewater;
recycling the sludge particles for thermal regeneration at 400-700 ℃ for recycling;
wherein, the waste liquid acidification refers to the acidification by adopting inorganic acid or organic acid; the calcium mineral powder is calcium carbonate, calcium oxide or a mixture thereof; the wetting agent is a nonionic or anionic wetting agent or a mixture thereof.
2. The method for extracting and utilizing the pollutants in the printing waste liquid of the high-concentration black water-based ink as claimed in claim 1, wherein the pasty sludge is heated by direct heating, indirect heating or a combination of the direct heating and the indirect heating.
CN201610904367.5A 2016-10-18 2016-10-18 Method for extracting and utilizing high-concentration black printing waste liquid pollutants Active CN106365349B (en)

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CN109126712A (en) * 2018-09-20 2019-01-04 青岛大学 A kind of high-efficiency decolorant preparation method containing photochemical catalyst
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CN109173996A (en) * 2018-09-20 2019-01-11 青岛大学 A kind of preparation method for improving stamp pulp thickening object and preparing adsorbent adsorbance
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CN109126702A (en) * 2018-09-20 2019-01-04 青岛大学 A method of improving adsorbent adsorption capacity prepared by stamp pulp thickening object
CN109126708A (en) * 2018-09-20 2019-01-04 青岛大学 A kind of adsorption decolouriser preparation method containing photochemical catalyst
CN109173997A (en) * 2018-09-20 2019-01-11 青岛大学 A kind of preparation method for improving stamp pulp thickening object and preparing adsorbent adsorption capacity
CN109126713A (en) * 2018-09-20 2019-01-04 青岛大学 A method of there is photo-catalysis function decolorising agent using the preparation of pulp thickening object
CN109126704A (en) * 2018-09-20 2019-01-04 青岛大学 A method of improving adsorbent absorption property prepared by stamp pulp thickening object
CN109126710A (en) * 2018-09-20 2019-01-04 青岛大学 A method of it prepares with photo-catalysis function adsorption decolouriser
CN109126709A (en) * 2018-09-20 2019-01-04 青岛大学 A kind of preparation method with photo-catalysis function adsorption decolouriser
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CN109289766A (en) * 2018-10-17 2019-02-01 青岛大学 A kind of preparation method of adsorbent for heavy metal
CN109289768A (en) * 2018-10-17 2019-02-01 青岛大学 A kind of efficient heavy ion adsorbent
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CN102205964A (en) * 2011-04-25 2011-10-05 山东大学 Granular activated carbon filler for paper mill sludge and preparation method thereof
CN103752274A (en) * 2013-12-12 2014-04-30 西北农林科技大学 Amphiprotic-Gemini type cationic composite adsorbent, and preparation method thereof

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