CN109354378A - A kind of method of the quick filtering means dehydration of printing and dyeing sludge - Google Patents
A kind of method of the quick filtering means dehydration of printing and dyeing sludge Download PDFInfo
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- CN109354378A CN109354378A CN201811523247.6A CN201811523247A CN109354378A CN 109354378 A CN109354378 A CN 109354378A CN 201811523247 A CN201811523247 A CN 201811523247A CN 109354378 A CN109354378 A CN 109354378A
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- sludge
- temperature
- copolymer
- aqueous high
- printing
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Classifications
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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
- 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
- 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
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- 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
- C02F11/123—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using belt or band filters
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a kind of methods of the quick filtering means dehydration of printing and dyeing sludge, comprising the following steps: by sludge condensation to 5% or more solid content, adds acid and is uniformly mixed, adjusting pH is 2-4；The aqueous high molecular copolymer that glass transition temperature is higher than 10-50 DEG C of room temperature is added into sludge, reacts 10-30min after mixing；Sludge is pumped on the dehydration strainer continuously run, pre-dehydration 1-2min；Sludge is heated, is elevated the temperature to the Tg or more of aqueous high molecular copolymer, copolymer molecule chain is crimped, constitutes permeable duct in sludge blanket；To sludge blanket deformation it is abundant after be cooled below 0-10 DEG C of aqueous high molecular copolymer Tg or less from bottom to top, form dimensional network structure after hardening copolymer molecule chain, the permeable duct formed in support sludge blanket reduces sludge specific resistance；Vacuum filtration or filters pressing fast dewatering 1-5min form dehydrated sludge cake, deviate from water and enter the sludge heat exchange before dewaterer strainer, saving heat energy.
Description
Technical field
The invention belongs to the technical field of sludge treatment in environmental protection, in particular to a kind of dirty print dye mud quickly filters de-
The method of water.
Background technique
The dehydration of sludge is always global problem, especially contains large amount of organic in printing and dyeing industry organic sludge,
Hydrophily is strong, and in conjunction with water content height, due to sludge specific resistance height, organic matter combination water content is high, dehydration speed when being filtered dehydration
Rate is slow, and moisture content of the cake is high.
At present for the improvement of dewatering performance of sludge, main includes heat conditioning, freeze thawing treatment, and high-temperature-hot-water solution adds wadding
Solidifying agent increases the methods of floc particle, but effect is generally not satisfactory, however it remains the slow problem of rate of water loss.
Summary of the invention
The purpose of the present invention is to provide a kind of methods of the quick filtering means dehydration of printing and dyeing sludge, by reducing sludge specific resistance,
Improve organic sludge filtering means dehydration speed.
For achieving the above object, the technical method that the present invention uses are as follows:
A kind of method of the quick filtering means dehydration of printing and dyeing sludge, which is characterized in that utilize the temperature-responsive water added into sludge
Property high-molecular copolymer its physical state is changed by temperature change to the response of temperature, reduce sludge specific resistance, make printing and dyeing sludge
Quick filtering means dehydration, comprising the following steps:
(1) sludge condensation for generating wastewater treatment adds acid into sludge and is uniformly mixed, adjust pH to 5% or more solid content
For 2-4；
(2) the aqueous high score of temperature-responsive that glass transition temperature (Tg) is higher than 10-50 DEG C of room temperature is added into sludge while stirring
Sub- copolymer, dosage are 10-30mg/g sludge, react 10-30min after mixing, make the aqueous high score of temperature-responsive being added
Water soluble group-COONR of sub- copolymer4, slough [NR4]+, it is total to reduce temperature-responsive aqueous high molecular binding hydrogen ions
The water solubility of polymers makes copolymer molecule sufficiently be precipitated and be combined with mud granule by van der Waals interaction absorption；
(3) sludge is pumped on the dehydration strainer continuously run and is evenly distributed, pre-dehydration 1-2min；
(4) it from bottom-heated sludge, elevates the temperature to Tg or more the 20-40 DEG C of temperature-responsive aqueous high molecular copolymer,
The temperature-responsive aqueous high molecular copolymer being precipitated is set to change its physical state, strand curling is cohered mud granule, driven
Mud granule deformation retract forms hole between the mud granule constantly increased upwards by sludge blanket bottom, constitutes and increase sludge
Permeable duct in layer；
(5) to sludge blanket deformation it is abundant after to be gradually cooled below from sludge blanket bottom temperature-responsive from bottom to top aqueous
High-molecular copolymer Tg or less 0-10 DEG C makes copolymer molecule chain in sludge blanket change its physical state, is transformed into glassy state, firmly
Dimensional network structure is formed after change, the permeable duct formed in support sludge blanket prevents duct from deforming, reduces sludge specific resistance, add
Fast sludge dewatering；
(6) vacuum filtration or filters pressing fast dewatering 1-5min form dehydrated sludge cake, deviate from water and enter the dirt before dewaterer strainer
Mud heat exchange, saving heat energy.
The utility model has the advantages that
A. sludge is treated by the present method, and sludge specific resistance can be reduced to original 1-6%, is transformed into easy filtering by sad rate sludge
Sludge, filtering rate are greatly accelerated, and filtration time shortens dramatically.
B. the temperature-responsive high-molecular copolymer formed with acid out in water phase is by the response to temperature in vitrifying temperature
The transformation of physical state realizes that sludge-heat-preservation sludge deformation permeable duct of drilling-hardening support is cohered in softening absorption about degree
Effect.The temperature-responsive aqueous high molecular copolymer molecule chain coulomb repulsion of precipitation reduces, the effect of rolling up after being heated, can
Sludge is bonded, mud granule high degree of agglomeration and deformation retract are driven, it is de- when hole composition filtering means dehydration between formation mud granule
Water hole road, and hardening by cooling rear support is dehydrated channel, and sludge pore deformation, collapsing, reduce sludge when can reduce filtering means dehydration
Resistivity.
C. the carboxyl in temperature-responsive copolymer being precipitated can be acted on the hydrophilic group of mud granule, change sludge table
Face performance reduces the active force between mud granule and water, while methyl, ethyl, ester group in copolymer soft segment etc. is dredged
Water base group further increases the hydrophobicity of mud granule, increases repulsion between muddy water, reduces the content that water is combined in thickened sludge, benefit
In sludge dewatering.
Specific embodiment
The present invention is further illustrated below by specific embodiment.
Embodiment 1
(1) sludge condensation for generating treatment of dyeing wastewater is to 5% or more solid content, and 93% concentrated sulfuric acid acid is added into sludge simultaneously
It is uniformly mixed, adjusting pH is 3.2；
(2) it is total that the temperature-responsive aqueous high molecular of glass transition temperature (Tg) higher than 40 DEG C of room temperature is added into sludge while stirring
Polymers, dosage are 30mg/g sludge, react 30min after mixing, make the temperature-responsive aqueous high molecular copolymer being added
Water soluble group-COONR4, slough [NR4]+, binding hydrogen ions, reduce temperature-responsive aqueous high molecular copolymer it is water-soluble
Property, so that copolymer molecule is sufficiently precipitated and is combined with mud granule by van der Waals interaction absorption；
(3) sludge is pumped on the dehydration strainer continuously run and is evenly distributed, pre-dehydration 1min；
(4) it from bottom-heated sludge, elevates the temperature to 30 DEG C of Tg or more of temperature-responsive aqueous high molecular copolymer, makes to analyse
Temperature-responsive aqueous high molecular copolymer molecule chain curling out, coheres mud granule, drives mud granule deformation retract, shape
At hole between the mud granule constantly increased upwards by sludge blanket bottom, constitutes and increase permeable duct in sludge blanket；
(5) to sludge blanket deformation it is abundant after to be gradually cooled below from sludge blanket bottom temperature-responsive from bottom to top aqueous
10 DEG C of high-molecular copolymer Tg or less, so that copolymer molecule chain in sludge blanket is transformed into glassy state, form cubic network after hardening
Structure, the interior permeable duct formed of support sludge blanket, prevents duct from deforming, reduces sludge specific resistance, accelerate sludge dewatering；
(6) vacuum filtration or filters pressing fast dewatering 3min form dehydrated sludge cake, deviate from water and enter the sludge before dewaterer strainer
Heat exchange, saving heat energy.
Dehydration test result shows to reach identical mud cake solid holdup, and dewatering time can shorten short by 80% or more, accelerates
Rate of water loss.
Embodiment 2
(1) by the sludge condensation for the treatment of of dyeing wastewater generation to 5% or more solid content, formic acid is added into sludge and is uniformly mixed,
Adjusting pH is 4；
(2) it is total that the temperature-responsive aqueous high molecular of glass transition temperature (Tg) higher than 40 DEG C of room temperature is added into sludge while stirring
Polymers, dosage are 20mg/g sludge, react 15min after mixing, make the temperature-responsive aqueous high molecular copolymer being added
Water soluble group-COONR4, slough [NR4]+, binding hydrogen ions, reduce temperature-responsive aqueous high molecular copolymer it is water-soluble
Property, so that copolymer molecule is sufficiently precipitated and is combined with mud granule by van der Waals interaction absorption；
(3) sludge is pumped on the dehydration strainer continuously run and is evenly distributed, pre-dehydration 1min；
(4) it from bottom-heated sludge, elevates the temperature to 20 DEG C of Tg or more of temperature-responsive aqueous high molecular copolymer, makes to analyse
Temperature-responsive aqueous high molecular copolymer molecule chain curling out, coheres mud granule, drives mud granule deformation retract, shape
At hole between the mud granule constantly increased upwards by sludge blanket bottom, constitutes and increase permeable duct in sludge blanket；
(5) to sludge blanket deformation it is abundant after to be gradually cooled below from sludge blanket bottom temperature-responsive from bottom to top aqueous
5 DEG C of high-molecular copolymer Tg or less, copolymer molecule chain in sludge blanket is made to be transformed into glassy state, forms cubic network knot after hardening
Structure, the interior permeable duct formed of support sludge blanket, prevents duct from deforming, reduces sludge specific resistance, accelerate sludge dewatering；
(6) vacuum filtration or filters pressing fast dewatering 5min form dehydrated sludge cake, deviate from water and enter the sludge before dewaterer strainer
Heat exchange, saving heat energy.
It is dehydrated test result to show to reach identical mud pump characteristic, dewatering time shortens 80% or more, accelerates dehydration
Rate.
Embodiment 3
A kind of method of the quick filtering means dehydration of printing and dyeing sludge, which comprises the following steps:
(1) sludge condensation for generating wastewater treatment adds 50% hydrochloric acid into sludge and mixes equal to 5% or more solid content
Even, adjusting pH is 2.5；
(2) it is total that the temperature-responsive aqueous high molecular of glass transition temperature (Tg) higher than 30 DEG C of room temperature is added into sludge while stirring
Polymers, dosage are 20mg/g sludge, react 10-min after mixing, make the temperature-responsive aqueous high molecular copolymer being added
Water soluble group-COONR4, slough [NR4]+, binding hydrogen ions, reduce temperature-responsive aqueous high molecular copolymer it is water-soluble
Property, so that copolymer molecule is sufficiently precipitated and is combined with mud granule by van der Waals interaction absorption；
(3) sludge is pumped on the dehydration strainer continuously run and is evenly distributed, pre-dehydration 1min；
(4) it from bottom-heated sludge, elevates the temperature to 20 DEG C of Tg or more of temperature-responsive aqueous high molecular copolymer, makes to analyse
Temperature-responsive aqueous high molecular copolymer molecule chain curling out, coheres mud granule, drives mud granule deformation retract, shape
At hole between the mud granule constantly increased upwards by sludge blanket bottom, constitutes and increase permeable duct in sludge blanket；
(5) to sludge blanket deformation it is abundant after to be gradually cooled below from sludge blanket bottom temperature-responsive from bottom to top aqueous
10 DEG C of high-molecular copolymer Tg or less, so that copolymer molecule chain in sludge blanket is transformed into glassy state, form cubic network after hardening
Structure, the interior permeable duct formed of support sludge blanket, prevents duct from deforming, reduces sludge specific resistance, accelerate sludge dewatering；
(6) vacuum filtration or filters pressing fast dewatering 2min form dehydrated sludge cake, deviate from water and enter the sludge before dewaterer strainer
Heat exchange, saving heat energy.
It is dehydrated test result to show to reach identical mud pump characteristic, dewatering time shortening is short by 80% or more, accelerates de-
Water speed rate.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any those skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its invent
Design is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (6)
1. a kind of method of the quick filtering means dehydration of printing and dyeing sludge, which is characterized in that utilize the temperature-responsive added into sludge
Aqueous high molecular copolymer changes its physical state by temperature change to the response of temperature, reduces sludge specific resistance, keeps printing and dyeing dirty
The quick filtering means dehydration of mud, comprising the following steps:
(1) sludge condensation for generating useless printing and dyeing water process adds acid into sludge and is uniformly mixed, adjust to 5% or more solid content
Section pH is 2-4；
(2) the aqueous high score of temperature-responsive that glass transition temperature (Tg) is higher than 10-50 DEG C of room temperature is added into sludge while stirring
Sub- copolymer reacts 10-30min after mixing, makes the water soluble group-for the temperature-responsive aqueous high molecular copolymer being added
COONR4, slough [NR4]+, binding hydrogen ions reduce the water solubility of temperature-responsive aqueous high molecular copolymer, make copolymer point
It is sub to be sufficiently precipitated and combined with mud granule by van der Waals interaction absorption；
(3) sludge is pumped on the dehydration strainer continuously run and is evenly distributed, pre-dehydration 1-2min；
(4) it from bottom-heated sludge, elevates the temperature to Tg or more the 20-40 DEG C of temperature-responsive aqueous high molecular copolymer,
So that the temperature-responsive aqueous high molecular copolymer being precipitated is changed the curling of its physical state strand, cohere mud granule, drives
Mud granule deformation retract forms hole between the mud granule constantly increased upwards by sludge blanket bottom, constitutes and increase sludge
Permeable duct in layer；
(5) to sludge blanket deformation it is abundant after to be gradually cooled below from sludge blanket bottom temperature-responsive from bottom to top aqueous
High-molecular copolymer Tg or less 0-10 DEG C makes copolymer molecule chain in sludge blanket change its physical state transformations at glassy state, firmly
Dimensional network structure is formed after change, the permeable duct formed in support sludge blanket prevents duct from deforming, reduces sludge specific resistance, add
Fast sludge dewatering；
(6) vacuum filtration or filters pressing fast dewatering 1-5min form dehydrated sludge cake, deviate from water and enter the dirt before dewaterer strainer
Mud heat exchange, saving heat energy.
2. a kind of method of the quick filtering means dehydration of printing and dyeing sludge according to claim 1, which is characterized in that the step
(1) sludge condensation in be concentrated using compression precipitating or floatation thickening mode it is any.
3. a kind of method of the quick filtering means dehydration of printing and dyeing sludge according to claim 1, which is characterized in that the step
(1) acid in is inorganic acid or organic acid, should be greater than the degree of ionization of carboxylic acid group in polyacrylic acid if organic acid its degree of ionization.
4. a kind of method of the quick filtering means dehydration of printing and dyeing sludge according to claim 1, which is characterized in that the step
(2) the temperature-responsive aqueous high molecular copolymer in is by styrene, butadiene, acrylonitrile, methyl acrylate, methacrylic acid
Methyl esters, ethyl acrylate, butyl acrylate, Isooctyl acrylate monomer, acrylic acid, methacrylic acid, in acrylamide it is several it is soft,
Hard monomer is copolymerized to be formed, and controls Tg by monomer mole ratio.
5. a kind of method of the quick filtering means dehydration of printing and dyeing sludge according to claim 1, which is characterized in that the step
(4) heating in refers to be added using any or its joint of electric heating, steam heating, infrared heating or microwave heating
The mode of heat.
6. a kind of method of the quick filtering means dehydration of printing and dyeing sludge according to claim 1, which is characterized in that the step
(5) cooling by the way of being blown cold water or air from bottom to top in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811523247.6A CN109354378A (en) | 2018-12-13 | 2018-12-13 | A kind of method of the quick filtering means dehydration of printing and dyeing sludge |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811523247.6A CN109354378A (en) | 2018-12-13 | 2018-12-13 | A kind of method of the quick filtering means dehydration of printing and dyeing sludge |
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| CN109354378A true CN109354378A (en) | 2019-02-19 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104909487A (en) * | 2014-03-10 | 2015-09-16 | 青岛大学 | High-concentration printing ink waste liquid treatment and sludge dewatering integration method and high-concentration printing ink waste liquid treatment and sludge dewatering integration apparatus |
| CN105084576A (en) * | 2014-05-05 | 2015-11-25 | 青岛大学 | Method for treating high-concentration water-based ink waste liquid and dehydrating sludge in high-concentration water-based ink waste liquid |
| CN105621843A (en) * | 2015-11-02 | 2016-06-01 | 江苏沃奇环保工程有限公司 | Sludge vitrifaction curing treatment process |
| CN108862972A (en) * | 2018-06-22 | 2018-11-23 | 山东大学 | A method of sludge charcoal processing is pyrolyzed based on microwave induced orientation heating technique |
-
2018
- 2018-12-13 CN CN201811523247.6A patent/CN109354378A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104909487A (en) * | 2014-03-10 | 2015-09-16 | 青岛大学 | High-concentration printing ink waste liquid treatment and sludge dewatering integration method and high-concentration printing ink waste liquid treatment and sludge dewatering integration apparatus |
| CN105084576A (en) * | 2014-05-05 | 2015-11-25 | 青岛大学 | Method for treating high-concentration water-based ink waste liquid and dehydrating sludge in high-concentration water-based ink waste liquid |
| CN105621843A (en) * | 2015-11-02 | 2016-06-01 | 江苏沃奇环保工程有限公司 | Sludge vitrifaction curing treatment process |
| CN108862972A (en) * | 2018-06-22 | 2018-11-23 | 山东大学 | A method of sludge charcoal processing is pyrolyzed based on microwave induced orientation heating technique |
Non-Patent Citations (2)
| Title |
|---|
| 冯孝中 等: "《高分子材料》", 28 February 2007, 哈尔滨工业大学出版社 * |
| 王淑荣: "《染整废水处理》", 30 September 2005, 中国纺织出版社 * |
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Application publication date: 20190219 |