CN109354379A - A method of improving printing and dyeing sludge dewatering - Google Patents
A method of improving printing and dyeing sludge dewatering Download PDFInfo
- Publication number
- CN109354379A CN109354379A CN201811523251.2A CN201811523251A CN109354379A CN 109354379 A CN109354379 A CN 109354379A CN 201811523251 A CN201811523251 A CN 201811523251A CN 109354379 A CN109354379 A CN 109354379A
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- sludge
- temperature
- copolymer
- mud granule
- high molecular
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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
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- Engineering & Computer Science (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)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a kind of methods for mentioning high dewatering performance of sludge of printing and dyeing, comprising the following steps: precipitating sludge is concentrated into 5% or more solid content, adds acid, adjusting pH is 3-4；The aqueous high molecular copolymer that glass transition temperature (Tg) is higher than room temperature is added into sludge, reacts 10-30min after mixing, copolymer molecule is precipitated；Sludge is heated, is elevated the temperature to the Tg or more of aqueous high molecular copolymer；10-40min is kept the temperature, the copolymer molecule chain adsorbed with mud granule is made to reunite together with mud granule, contraction distortion forms hole between mud granule；Cooling down supports hole between the mud granule of formation until temperature forms network skeleton after being lower than aqueous high molecular copolymer Tg hereinafter, hardening copolymer；Sludge filtration is dehydrated, permeable duct when sludge filtration is formed by the supporting role of the copolymer molecule chain after hardening, improves the performance of sludge dewatering.
Description
Technical field
The invention belongs to the technical field of sludge treatment in environmental protection, in particular to a kind of raising printing and dyeing sludge dehydration property
The method of energy.
Background technique
The dehydration of sludge is always global problem, is contained in the sludge that especially treatment of dyeing wastewater generates a large amount of hydrophilic
Property organic matter, in conjunction with water content height, using plate and frame filter press, belt type dewaterer or centrifugal dehydrator etc. carry out mechanical dehydration or
Sludge blanket duct is easy blocking when the solid-liquid separating methods such as vacuum dehydration are dehydrated, and rate of water loss is slow, and moisture content of the cake is high.
At present for the raising 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 improvement effect is generally not satisfactory, and sludge specific resistance is big, is still difficult to be dehydrated.
Summary of the invention
The purpose of the present invention is to provide a kind of methods for improving dewatering performance of sludge, by reducing sludge ratio when filtering
Resistance improves dewatering performance of sludge.
For achieving the above object, the technical method that the present invention uses are as follows:
A method of improving printing and dyeing sludge dewatering, which is characterized in that utilize the pH and temperature-responsive added into sludge
Property aqueous high molecular copolymer its physical state is changed by temperature change to the response of temperature, reduce sludge specific resistance, improve print
Contaminate dewatering performance of sludge, comprising the following steps:
(1) precipitating sludge is concentrated into 5% or more solid content, acid is added into sludge, adjusting pH is 3-5；
(2) it is aqueous higher than 10-50 DEG C of room temperature of pH and temperature-responsive that glass transition temperature (Tg) is added into sludge while stirring
High-molecular copolymer, dosage are 10-30mg/g sludge, react 10-30min after mixing, make the water solubility for the copolymer being added
Group sloughs-[NR4]+, binding hydrogen ions, formation-COOH reduces the water solubility of copolymer, copolymer molecule is precipitated sufficiently
And it is combined with mud granule by Van der Waals force and hydrogen bond action absorption；
(3) sludge is heated, elevates the temperature to Tg or more the 5-40 DEG C of pH and temperature-responsive aqueous high molecular copolymer, changes
Becoming its physical state crimps copolymer emulsion strand, coheres mud granule；
(4) 10-40min is kept the temperature, the copolymer molecule chain adsorbed with mud granule is made to reunite together with mud granule, shrinks and becomes
Shape, forms hole between mud granule, and reduces the hydrophilic of mud granule by hydrophobic groupings such as methyl, ester groups in copolymer
Property；
(5) by sludge cooling down, until temperature is lower than pH and temperature-responsive aqueous high molecular copolymer Tg hereinafter, changing physics
State makes copolymer molecule chain be transformed into glassy state, forms network skeleton after hardening, supports hole between the mud granule of formation；
(6) it will be cooled to temperature to be dehydrated lower than pH and temperature-responsive aqueous high molecular copolymer Tg sludge filtration below, lead to
Permeable duct when the supporting role of copolymer molecule chain after overcure forms sludge filtration simultaneously prevents or reduces filter process
Middle duct deformation, improves the performance of sludge filtration dehydration.
The utility model has the advantages that
A. printing and dyeing sludge is treated by the present method, and sludge specific resistance can be reduced to original 3-6%, is transformed into easily by difficult filter sludge
Filter sludge, filtering rate are greatly accelerated, and identical moisture content of the cake is reached, and filtration time shortens 80% or more.
B. the carboxyl in pH and temperature-responsive copolymer being precipitated can be acted on the hydrophilic group of mud granule, be changed dirty
Mud surface property reduces the active force between mud granule and water, while methyl, ethyl, ester group in copolymer soft segment
Equal hydrophobic groupings further increase the hydrophobicity of mud granule, increase repulsion between muddy water, reduce and combine containing for water in thickened sludge
Amount is conducive to sludge dewatering.
C. the pH and temperature-responsive high-molecular copolymer formed with acid out in water phase is by the response to temperature in glass
The conversion of its physical state realizes that softening absorption coheres sludge-heat-preservation sludge deformation drilling-firmly in water phase above and below change temperature
Change and supports permeable pore canal role.The pH and temperature-responsive aqueous high molecular copolymer molecule chain coulomb repulsion of precipitation are reduced, by
Effect is rolled up after heat, can bond sludge, drives mud granule high degree of agglomeration and deformation retract, forms hole between mud granule
Dehydration duct when filtering means dehydration is constituted, and hardening by cooling rear support is dehydrated channel, sludge hole when can reduce filtering means dehydration
Deformation is collapsed, and sludge specific resistance is reduced.
Specific embodiment
The present invention is further illustrated below by specific embodiment.
Embodiment 1
A method of improving printing and dyeing sludge dewatering, comprising the following steps:
(1) the precipitating sludge compression precipitating that treatment of dyeing wastewater generates is concentrated into solid content 5.2%, 93% is added into sludge
The concentrated sulfuric acid, adjusting pH is 3.6 or so；
(2) pH and the aqueous high score of temperature-responsive of glass transition temperature (Tg) higher than 30 DEG C of room temperature is added into sludge while stirring
Sub- copolymer, dosage are 30mg/g sludge, are stirred to react 30min after mixing, keep the water soluble group for the copolymer being added de-
Remove-[NR4]+, binding hydrogen ions, formation-COOH, reduce pH and temperature-responsive aqueous high molecular copolymer water solubility, make
Copolymer molecule is sufficiently precipitated and is combined with mud granule by Van der Waals force and hydrogen bond action absorption；
(3) by sludge heating water bath, 40 DEG C of Tg or more to elevate the temperature to pH and temperature-responsive aqueous high molecular copolymer,
Copolymer emulsion strand is crimped, mud granule is cohered；
(4) 10min is kept the temperature, the copolymer molecule chain adsorbed with mud granule is made to reunite together with mud granule, contraction distortion,
It forms hole between mud granule, and reduces the hydrophily of mud granule by hydrophobic groupings such as methyl, ester groups in copolymer；
(5) by sludge cooling down, until temperature makes altogether lower than 10 DEG C below pH and temperature-responsive aqueous high molecular copolymer Tg
Polymers strand is transformed into glassy state, forms network skeleton after hardening, supports hole between the mud granule of formation；
(6) it will be cooled to temperature to be dehydrated lower than pH and temperature-responsive aqueous high molecular copolymer Tg sludge filtration below, lead to
Permeable duct when the supporting role of copolymer molecule chain after overcure forms sludge filtration simultaneously prevents or reduces filter process
Middle duct deformation, improves the performance of sludge filtration dehydration.
Vacuum filtration test result shows that sludge specific resistance is reduced to the 4.53% of raw sewage, and it is left that moisture content of the cake reduces by 3.20%
It is right.
Embodiment 2
A method of improving printing and dyeing sludge dewatering, which comprises the following steps:
(1) precipitating sludge compression precipitating is concentrated into 5.2% or more solid content, 50% hydrochloric acid is added into sludge, adjusted
PH is 3.85；
(2) pH and the aqueous high score of temperature-responsive of glass transition temperature (Tg) higher than 20 DEG C of room temperature is added into sludge while stirring
Sub- copolymer, dosage be 20mg/g sludge, react 20min after mixing, make be added copolymer water soluble group slough-
[NR4]+, binding hydrogen ions, formation-COOH, reduce pH and temperature-responsive aqueous high molecular copolymer water solubility, make to be copolymerized
Object molecule is sufficiently precipitated and is combined with mud granule by Van der Waals force and hydrogen bond action absorption；
(3) sludge is heated, 10 DEG C of Tg or more to elevate the temperature to pH and temperature-responsive aqueous high molecular copolymer make altogether
The curling of polymers latex strand, coheres mud granule；
(4) 40min is kept the temperature, the copolymer molecule chain adsorbed with mud granule is made to reunite together with mud granule, contraction distortion,
Hole between formation mud granule, and pass through the hydrophobic groups such as methyl, ester group in pH and temperature-responsive aqueous high molecular copolymer
Group reduces the hydrophily of mud granule；
(5) by sludge cooling down, until temperature makes altogether lower than 5 DEG C below pH and temperature-responsive aqueous high molecular copolymer Tg
Polymers strand is transformed into glassy state, forms network skeleton after hardening, supports hole between the mud granule of formation；
(6) it will be cooled to temperature to be dehydrated lower than pH and temperature-responsive aqueous high molecular copolymer Tg sludge filtration below, lead to
Permeable duct when the supporting role of copolymer molecule chain after overcure forms sludge filtration simultaneously prevents or reduces filter process
Middle duct deformation, improves the performance of sludge filtration dehydration.
Vacuum filtration test result shows that sludge specific resistance is reduced to the 3.91% of raw sewage, and it is left that moisture content of the cake reduces by 3.70%
It is right.
Embodiment 3
A method of improving printing and dyeing sludge dewatering, which comprises the following steps:
(1) precipitating sludge compression precipitating is concentrated into solid content 5.0%, formic acid is added into sludge, adjusting pH is 3.91；
(2) pH and the aqueous high score of temperature-responsive of glass transition temperature (Tg) higher than 40 DEG C of room temperature is added into sludge while stirring
Sub- copolymer, dosage be 25mg/g sludge, react 10min after mixing, make be added copolymer water soluble group slough-
[NR4]+, binding hydrogen ions, formation-COOH, reduce pH and temperature-responsive aqueous high molecular copolymer water solubility, make to be copolymerized
Object molecule is sufficiently precipitated and is combined with mud granule by Van der Waals force and hydrogen bond action absorption；
(3) sludge is heated, 20 DEG C of Tg or more to elevate the temperature to pH and temperature-responsive aqueous high molecular copolymer make altogether
The curling of polymers latex strand, coheres mud granule；
(4) 30min is kept the temperature, the copolymer molecule chain adsorbed with mud granule is made to reunite together with mud granule, contraction distortion,
It forms hole between mud granule, and reduces the hydrophily of mud granule by hydrophobic groupings such as methyl, ester groups in copolymer；
(5) by sludge cooling down, until temperature makes altogether lower than 10 DEG C below pH and temperature-responsive aqueous high molecular copolymer Tg
Polymers strand is transformed into glassy state, forms network skeleton after hardening, supports hole between the mud granule of formation；
(6) it will be cooled to temperature to be dehydrated lower than pH and temperature-responsive aqueous high molecular copolymer Tg sludge filtration below, lead to
Permeable duct when the supporting role of copolymer molecule chain after overcure forms sludge filtration simultaneously prevents or reduces filter process
Middle duct deformation, improves the performance of sludge filtration dehydration.
Vacuum filtration test result shows that sludge specific resistance is reduced to the 5.78% of raw sewage, and it is left that moisture content of the cake reduces by 3.10%
It is right.
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 (7)
1. a kind of method for improving printing and dyeing sludge dewatering, which is characterized in that rung using the pH and temperature that are added into sludge
Answering property aqueous high molecular copolymer changes its physical state by temperature change to the response of temperature, reduces sludge specific resistance, improves
Printing and dyeing sludge dewatering, comprising the following steps:
(1) treatment of dyeing wastewater precipitating sludge is concentrated into 5% or more solid content, acid is added into sludge, adjusting pH is 3-5；
(2) it is aqueous higher than 10-50 DEG C of room temperature of pH and temperature-responsive that glass transition temperature (Tg) is added into sludge while stirring
High-molecular copolymer reacts 10-30min after mixing, and the water soluble group for the copolymer being added is made to slough-[NR4]+, in conjunction with hydrogen
Ion, formation-COOH reduce the water solubility of copolymer, and copolymer molecule is precipitated sufficiently and passes through Van der Waals with mud granule
Power and hydrogen bond action absorption combine；
(3) sludge is heated, elevates the temperature to Tg or more the 5-40 DEG C of pH and temperature-responsive aqueous high molecular copolymer, changes
Becoming its physical state crimps copolymer emulsion strand, coheres mud granule；
(4) 10-40min is kept the temperature, the copolymer molecule chain adsorbed with mud granule is made to reunite together with mud granule, shrinks and becomes
Shape, forms hole between mud granule, and reduces the hydrophilic of mud granule by hydrophobic groupings such as methyl, ester groups in copolymer
Property；
(5) by sludge cooling down, until temperature is lower than pH and temperature-responsive aqueous high molecular copolymer Tg hereinafter, making copolymer
Strand changes physical state transformations into glassy state, forms network skeleton after hardening, supports hole between the mud granule of formation；
(6) it will be cooled to temperature to be dehydrated lower than pH and temperature-responsive aqueous high molecular copolymer Tg sludge filtration below, lead to
Permeable duct when the supporting role of copolymer molecule chain after overcure forms sludge filtration simultaneously prevents duct in filter process
Deformation improves the performance of sludge filtration dehydration.
2. a kind of method for improving printing and dyeing sludge dewatering according to claim 1, which is characterized in that the step
(1) sludge condensation in uses compression precipitating or floatation thickening mode, preferably floatation thickening mode.
3. a kind of method for improving printing and dyeing sludge dewatering according to claim 1, which is characterized in that the step
(1) acid in is inorganic acid or organic acid, should be greater than pH if organic acid its degree of ionization and temperature-responsive aqueous high molecular is total
The degree of ionization of carboxylic acid group in polymers.
4. a kind of method for improving printing and dyeing sludge dewatering according to claim 1, which is characterized in that the step
(2) pH and temperature-responsive aqueous high molecular copolymer in are by methyl acrylate, ethyl acrylate, butyl acrylate, propylene
It is the different monooctyl ester of acid, methyl methacrylate, acrylonitrile, acrylic acid, methacrylic acid, styrene, butadiene, several in acrylamide
Kind is soft, hard monomer is copolymerized to be formed.
5. a kind of method for improving printing and dyeing sludge dewatering according to claim 1, which is characterized in that the step
(3) using electric heating, steam heating or conduction oil etc., directly or indirectly any one of heating method or joint add the heating in
Hot mode.
6. a kind of method for improving printing and dyeing sludge dewatering according to claim 1, which is characterized in that the step
(5) cooling down in using the sludge after adding pH and temperature-responsive aqueous high molecular copolymer reaction by heat exchange into
Row recycles thermal energy.
7. a kind of method for improving printing and dyeing sludge dewatering according to claim 1, which is characterized in that the step
(6) filtering means dehydration in is using any one mode in natural filtration or vacuum filtration or mechanism filter-pressing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811523251.2A CN109354379A (en) | 2018-12-13 | 2018-12-13 | A method of improving printing and dyeing sludge dewatering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811523251.2A CN109354379A (en) | 2018-12-13 | 2018-12-13 | A method of improving printing and dyeing sludge dewatering |
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| Publication Number | Publication Date |
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| CN109354379A true CN109354379A (en) | 2019-02-19 |
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| CN201811523251.2A Withdrawn CN109354379A (en) | 2018-12-13 | 2018-12-13 | A method of improving printing and dyeing sludge dewatering |
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Citations (5)
| 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 |
| CN108911479A (en) * | 2018-07-27 | 2018-11-30 | 成都源永科技发展有限公司 | A kind of industrial sludge vitrifying addition medicament |
-
2018
- 2018-12-13 CN CN201811523251.2A patent/CN109354379A/en not_active Withdrawn
Patent Citations (5)
| 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 |
| CN108911479A (en) * | 2018-07-27 | 2018-11-30 | 成都源永科技发展有限公司 | A kind of industrial sludge vitrifying addition medicament |
Non-Patent Citations (2)
| Title |
|---|
| 冯孝中 主编: "《高分子材料》", 28 February 2007, 哈尔滨工业大学出版社 * |
| 王淑荣 主编: "《染整废水处理》", 30 September 2005, 中国纺织出版社 * |
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Address after: 266071 No. 7 East Hongkong Road, Laoshan District, Shandong, Qingdao Applicant after: Qingdao University Address before: 266071 Ningxia Road, Shandong, China, No. 308, No. Applicant before: Qingdao University |
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