CN109354377A - A kind of preprocess method of printing and dyeing sludge fast dewatering - Google Patents
A kind of preprocess method of printing and dyeing sludge fast dewatering Download PDFInfo
- Publication number
- CN109354377A CN109354377A CN201811523224.5A CN201811523224A CN109354377A CN 109354377 A CN109354377 A CN 109354377A CN 201811523224 A CN201811523224 A CN 201811523224A CN 109354377 A CN109354377 A CN 109354377A
- Authority
- CN
- China
- Prior art keywords
- sludge
- temperature
- copolymer
- tank
- printing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (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)
- Mechanical Engineering (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a kind of preprocess methods of printing and dyeing sludge fast dewatering, it is characterized in that, the following steps are included: sludge condensation to 5% or more solid content is pumped into reactor tank, amine (or ammonium) the salt dissolved matter for being copolymerized the temperature-responsive polyacrylate copolymer formed by soft monomer, hard monomer and acrylic monomer is added, is uniformly mixed；Acid adding, adjusting pH are 2-4, are stirred to react 10-30min；Enter in heating tank after sludge is pumped into heat exchange tank heat exchange heating, heat sludge, keeps the temperature 10-30min；Sludge by heating tank enter heat exchange tank cooling down to temperature lower than polyacrylate copolymer Tg hereinafter, hard frame network between making polyacrylate copolymer form mud granule, raising rate of water loss；Cooling pretreating sludge enters sludge dewatering equipment dehydration by heat exchange tank immediately, and the sludge after abjection water preheating acid adding recycles thermal energy.
Description
Technical field
The invention belongs to the technical field of sludge treatment in environmental protection, in particular to a kind of printing and dyeing sludge fast dewatering
Preprocess method.
Background technique
The dehydration of sludge is always global problem, and large amount of organic is especially contained in printing and dyeing sludge, and hydrophily is strong,
In conjunction with water content height, rate of water loss is slow when being dehydrated using plate and frame filter press, belt type dewaterer mechanism filter-pressing.
At present for the improved pretreatment of dewatering performance of sludge, main includes heat conditioning, freeze thawing treatment, high-temperature-hot-water
The methods of solve, add flocculant increase floc particle, but effect is generally not satisfactory.
Summary of the invention
The purpose of the present invention is to provide a kind of preprocess methods of printing and dyeing sludge fast dewatering, by reducing sludge ratio
Resistance improves sludge press filtration dewatering speed.
For achieving the above object, the technical method that the present invention uses are as follows:
A kind of preprocess method of printing and dyeing sludge fast dewatering, which is characterized in that rung using the pH and temperature that are added into sludge
Answering property polyacrylate high-molecular copolymer changes its physical state by temperature change to the response of temperature, improves Sludge Surface
Hydrophobic performance reduces sludge specific resistance, makes sludge fast dewatering, comprising the following steps:
(1) sludge condensation to 5% or more the solid content that treatment of dyeing wastewater process generates is pumped into reactor tank, is added into sludge
Enter the amine that the pH formed Yu temperature-responsive polyacrylate copolymer are copolymerized by soft monomer, hard monomer and acrylic monomer
(or ammonium) salt dissolved matter, dosage are 200-600mg/g dewatered sludge, are uniformly mixed；
(2) acid is added into sludge while stirring, adjusting pH is 2-4；It is stirred to react 10-30min, makes polyacrylate copolymer
Water soluble group-COO—Slough [NR4]+, binding hydrogen ions formation-COOH, degree of ionization reduces, and it is poly- to reduce temperature-responsive
The water solubility of acrylate copolymer is precipitated copolymer molecule sufficiently and passes through Van der Waals force and hydrogen bond action with mud granule
Absorption combines；
(3) enter in heating tank after sludge being pumped into heat exchange tank heat exchange heating, heat sludge, elevate the temperature to temperature and ring
Above 10-30 DEG C of the glass transition temperature (Tg) of answering property polyacrylate copolymer, changing its physical state keeps temperature-responsive poly-
The curling of acrylate copolymer strand, coheres mud granule, sludge keeps the temperature residence time 10-30min in heating tank, makes
Reunite together with rolling up movement drive mud granule with the polymer molecular chain that mud granule coheres, contraction distortion forms sludge
Intergranular pore, and pass through the hydrophobic groupings such as methyl, ester group in temperature-responsive polyacrylate copolymer and improve mud granule
Hydrophobicity；
(4) sludge enters heat exchange tank cooling down to temperature lower than temperature-responsive polyacrylate copolymer Tg by heating tank
Hereinafter, temperature-responsive polyacrylate copolymer is made to revert to glassy state by elastomeric state, hard frame net between mud granule is formed
Network, the deformation blocking of dehydration duct, improves rate of water loss when reducing sludge dewatering；
(5) temperature-responsive polyacrylate copolymer Tg pretreating sludge below is cooled below immediately by heat exchange
Tank enters sludge dewatering equipment dehydration, and the sludge after abjection water preheating acid adding recycles thermal energy.
The utility model has the advantages that
A. printing and dyeing sludge is pre-processed through this method, and sludge specific resistance can be reduced to original 1-10%, is transformed by sad rate sludge
For easy filter sludge, filtering rate is greatly accelerated, and reaches identical moisture content of the cake, and filtration time shortens 90% or more.
B. the pH and temperature-responsive polyacrylate copolymer formed with acid out is by the response to temperature in vitrifying
The variation of physical state realizes that sludge-heat-preservation sludge deformation drilling-hardening branch is cohered in softening absorption in water phase above and below temperature
Support permeable pore canal role.The pH and temperature-responsive polyacrylate copolymer strand coulomb repulsion of precipitation are reduced, after being heated
The effect of rolling up can bond sludge, drive mud granule high degree of agglomeration and deformation retract, and hole is constituted between forming mud granule
Dehydration duct when filtering means dehydration, and hardening by cooling rear support is dehydrated channel, sludge pore deformation when can reduce filtering means dehydration,
It collapses, reduces sludge specific resistance.
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.
Specific embodiment
The present invention is further illustrated below by specific embodiment.
Embodiment 1
(1) sludge condensation to 5% or more the solid content that treatment of dyeing wastewater process generates is pumped into reactor tank, is added into sludge
Enter the amine that the pH formed Yu temperature-responsive polyacrylate copolymer are copolymerized by soft monomer, hard monomer and acrylic monomer
(or ammonium) salt dissolved matter, dosage are 200mg/g dewatered sludge, are uniformly mixed；
(2) acid is added into sludge while stirring, adjusting pH is 3.96；It is stirred to react 10min, makes polyacrylate copolymer
Water soluble group-COO—Slough [NR4]+, binding hydrogen ions formation-COOH, degree of ionization reduction, reduction polyacrylate copolymerization
The water solubility of object makes copolymer molecule sufficiently be precipitated and be combined with mud granule by Van der Waals force and hydrogen bond action absorption；
(3) enter in heating tank after sludge being pumped into heat exchange tank heat exchange heating, heat sludge, elevate the temperature to polypropylene
More than the glass transition temperature (Tg) of acid ester copolymer 10 DEG C, polyacrylate copolymer strand is crimped, mud granule is cohered,
Sludge keeps the temperature residence time 30min in heating tank, makes to roll up movement drive dirt with the polymer molecular chain that mud granule coheres
Mud particle is reunited together, contraction distortion, forms hole between mud granule, and pass through methyl, the ester in polyacrylate copolymer
The hydrophobicity of the hydrophobic groupings such as base raising mud granule；
(4) sludge enters heat exchange tank cooling down to temperature by heating tank and is lower than 10 DEG C of polyacrylate copolymer Tg or less,
So that polyacrylate copolymer is changed into glassy state by elastomeric state, form hard frame network between mud granule, reduces sludge dewatering
When dehydration duct deformation blocking, improve rate of water loss；
(5) pH and temperature-responsive polyacrylate copolymer Tg pretreating sludge below are cooled below immediately by heat
Swap tank enters sludge dewatering equipment dehydration, and the sludge after abjection water preheating acid adding recycles thermal energy.
Vacuum dehydration the result shows that, its rate of water loss can be improved ten times or more compared with raw sewage, reach identical mud cake
Moisture content, dewatering time can be shorten within the 10% of raw sewage.
Embodiment 2
(1) sludge condensation to 5% or more the solid content that treatment of dyeing wastewater process generates is pumped into reactor tank, is added into sludge
Enter the amine that the pH formed Yu temperature-responsive polyacrylate copolymer are copolymerized by soft monomer, hard monomer and acrylic monomer
(or ammonium) salt dissolved matter, dosage are 400mg/g dewatered sludge, are uniformly mixed；
(2) acid is added into sludge while stirring, adjusting pH is 4.0；It is stirred to react 20min, makes polyacrylate copolymer
Water soluble group-COO—Slough [NR4]+, binding hydrogen ions formation-COOH, degree of ionization reduction, reduction polyacrylate copolymerization
The water solubility of object makes copolymer molecule sufficiently be precipitated and be combined with mud granule by Van der Waals force and hydrogen bond action absorption；
(3) enter in heating tank after sludge being pumped into heat exchange tank heat exchange heating, heat sludge, elevate the temperature to polypropylene
More than the glass transition temperature (Tg) of acid ester copolymer 20 DEG C, polyacrylate copolymer strand is crimped, mud granule is cohered,
Sludge keeps the temperature residence time 20min in heating tank, makes to roll up movement drive dirt with the polymer molecular chain that mud granule coheres
Mud particle is reunited together, contraction distortion, forms hole between mud granule, and pass through methyl, the ester in polyacrylate copolymer
The hydrophobicity of the hydrophobic groupings such as base raising mud granule；
(4) sludge enters heat exchange tank cooling down to temperature by heating tank and is lower than polyacrylate copolymer Tg hereinafter, making to gather
Acrylate copolymer is changed into glassy state by elastomeric state, forms hard frame network between mud granule, reduces de- when sludge dewatering
The deformation blocking of water hole road, improves rate of water loss；
(5) it is cooled below polyacrylate copolymer Tg pretreating sludge below and sludge is entered by heat exchange tank immediately
Dewaterer dehydration, abjection water preheat the sludge after acid adding, recycle thermal energy.
Vacuum dehydration the result shows that, its rate of water loss can be improved ten times or more compared with raw sewage, reach identical mud cake
Moisture content, dewatering time are shorten within the 10% of raw sewage.
Embodiment 3
(1) sludge condensation to 5% or more the solid content that treatment of dyeing wastewater process generates is pumped into reactor tank, is added into sludge
Enter the amine that the pH formed Yu temperature-responsive polyacrylate copolymer are copolymerized by soft monomer, hard monomer and acrylic monomer
(or ammonium) salt dissolved matter, dosage are 600mg/g dewatered sludge, are uniformly mixed；
(2) acid is added into sludge while stirring, adjusting pH is 2.7；It is stirred to react 30min, makes polyacrylate copolymer
Water soluble group-COO—Slough [NR4]+, binding hydrogen ions formation-COOH, degree of ionization reduction, reduction polyacrylate copolymerization
The water solubility of object makes copolymer molecule sufficiently be precipitated and be combined with mud granule by Van der Waals force and hydrogen bond action absorption；
(3) enter in heating tank after sludge being pumped into heat exchange tank heat exchange heating, heat sludge, elevate the temperature to pH and temperature
30 DEG C of the glass transition temperature (Tg) of responsiveness polyacrylate copolymer or more is spent, polyacrylate copolymer strand is rolled up
Song coheres mud granule, and sludge keeps the temperature residence time 10min in heating tank, makes the polymer molecule cohered with mud granule
Chain rolls up movement and mud granule is driven to reunite together, contraction distortion, forms hole between mud granule, and total by polyacrylate
The hydrophobicity of the hydrophobic groupings such as methyl, ester group in polymers raising mud granule；
(4) sludge enters heat exchange tank cooling down to temperature lower than 5 DEG C of polyacrylate copolymer Tg or less by heating tank, makes
Polyacrylate copolymer is changed into glassy state by elastomeric state, forms hard frame network between mud granule, when reducing sludge dewatering
It is dehydrated duct deformation blocking, improves rate of water loss；
(5) pH and temperature-responsive polyacrylate copolymer Tg pretreating sludge below are cooled below immediately by heat
Swap tank enters sludge dewatering equipment dehydration, and the sludge after abjection water preheating acid adding recycles thermal energy.
Vacuum dehydration the result shows that, its rate of water loss can be improved ten times or more compared with raw sewage, reach identical mud cake
Moisture content, dewatering time can be shorten within the 10% of raw sewage.
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 preprocess method of printing and dyeing sludge fast dewatering, which is characterized in that utilize the pH and temperature added into sludge
Responsiveness polyacrylate high-molecular copolymer changes its physical state by temperature change to the response of temperature, improves sludge table
Face hydrophobic performance reduces sludge specific resistance, makes sludge fast dewatering, comprising the following steps:
(1) printing and dyeing sludge 5% or more solid content is concentrated into be pumped into reactor tank, into sludge be added by soft monomer, hard monomer with
Acrylic monomer is copolymerized amine (or ammonium) salt dissolved matter of the pH to be formed Yu temperature-responsive polyacrylate copolymer, and stirring is mixed
It closes uniform；
(2) acid is added into sludge while stirring, adjusting pH is 2-4, is stirred to react 10-30min, makes polyacrylate copolymer
Water soluble group-COO—Slough [NR4]+, binding hydrogen ions formation-COOH, degree of ionization reduces, and it is total to reduce polyacrylate
The water solubility of polymers makes copolymer molecule sufficiently be precipitated and be combined with mud granule by Van der Waals force and hydrogen bond action absorption；
(3) enter in heating tank after sludge being pumped into heat exchange tank heat exchange heating, heat sludge, elevate the temperature to polypropylene
Above 10-30 DEG C of the glass transition temperature (Tg) of acid ester copolymer, changing its physical state makes polyacrylate copolymer strand
Curling, coheres mud granule, sludge keeps the temperature residence time 10-30min in heating tank, makes to polymerize with what mud granule cohered
Object strand rolls up movement and mud granule is driven to reunite together, and contraction distortion forms hole between mud granule, and passes through polypropylene
The hydrophobicity of the hydrophobic groupings such as methyl, ester group in acid ester copolymer raising mud granule；
(4) sludge enters heat exchange tank cooling down to temperature by heating tank and is lower than polyacrylate copolymer Tg hereinafter, making to gather
Acrylate copolymer reverts to glassy state by elastomeric state, forms hard frame network between mud granule, reduces de- when sludge dewatering
The deformation blocking of water hole road, improves rate of water loss；
(5) it is cooled below polyacrylate copolymer Tg pretreating sludge below and sludge is entered by heat exchange tank immediately
Dewaterer dehydration, abjection water preheat the sludge after acid adding, recycle thermal energy.
2. a kind of preprocess method of printing and dyeing sludge fast dewatering according to claim 1, which is characterized in that the step
(1) pH in and temperature-responsive polyacrylate copolymer are by esters of acrylic acid soft monomer, esters of acrylic acid hard monomer or non-
Acrylic compounds hard monomer is copolymerized to be formed, and glass transition temperature is 40-80 DEG C.
3. a kind of preprocess method of printing and dyeing sludge fast dewatering according to claim 1, which is characterized in that the step
(1) sludge condensation in is concentrated using compression precipitating or floatation thickening mode.
4. a kind of preprocess method of printing and dyeing sludge fast dewatering according to claim 1, which is characterized in that the step
(2) 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.
5. a kind of preprocess method of printing and dyeing sludge fast dewatering according to claim 1, which is characterized in that the step
(3) heating of the heating tank in is by the way of electric heating, steam heating or heat-conducting oil heating or its combined heat.
6. a kind of preprocess method of printing and dyeing sludge fast dewatering according to claim 1, which is characterized in that the step
(5) sludge dewatering equipment in is dehydrated either type using vacuum filtration dehydration, natural filtration dehydration or mechanism filter-pressing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811523224.5A CN109354377A (en) | 2018-12-13 | 2018-12-13 | A kind of preprocess method of printing and dyeing sludge fast dewatering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811523224.5A CN109354377A (en) | 2018-12-13 | 2018-12-13 | A kind of preprocess method of printing and dyeing sludge fast dewatering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109354377A true CN109354377A (en) | 2019-02-19 |
Family
ID=65328768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811523224.5A Withdrawn CN109354377A (en) | 2018-12-13 | 2018-12-13 | A kind of preprocess method of printing and dyeing sludge fast dewatering |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109354377A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008055397A (en) * | 2006-08-31 | 2008-03-13 | Miwa Lock Co Ltd | Treatment method of wastewater produced in coating process |
| CN105084698A (en) * | 2014-05-05 | 2015-11-25 | 青岛大学 | Microwave-heating continuous dehydration method and apparatus for sludge |
| 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 |
| CN109251271A (en) * | 2018-07-26 | 2019-01-22 | 北京工业大学 | A kind of preparation method of temperature response type pectinate texture polycarboxylic acids |
-
2018
- 2018-12-13 CN CN201811523224.5A patent/CN109354377A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008055397A (en) * | 2006-08-31 | 2008-03-13 | Miwa Lock Co Ltd | Treatment method of wastewater produced in coating process |
| CN105084698A (en) * | 2014-05-05 | 2015-11-25 | 青岛大学 | Microwave-heating continuous dehydration method and apparatus for sludge |
| 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 |
| CN109251271A (en) * | 2018-07-26 | 2019-01-22 | 北京工业大学 | A kind of preparation method of temperature response type pectinate texture polycarboxylic acids |
Non-Patent Citations (1)
| Title |
|---|
| 胡飞燕: "《涂料基础配方与工艺》", 30 June 2013, 东华大学出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2624089B2 (en) | Cationic polymer flocculant | |
| CN101037492A (en) | Method for preparing propylene amides copolymer with regular branch structure by inverse emulsion method | |
| CN107321335B (en) | Preparation method and application method of adsorbent for treating reactive dye wastewater | |
| CN101367573B (en) | Compound for wastewater treatment | |
| CN107814890A (en) | A kind of preparation method of hydrophobic association type PAMC | |
| US9321869B2 (en) | Cationic polymers | |
| CN109354377A (en) | A kind of preprocess method of printing and dyeing sludge fast dewatering | |
| CN112624565B (en) | Polyhydroxy organic cation polymer sludge conditioner for deep dehydration of sludge and preparation method thereof | |
| CN108239223B (en) | Preparation method of high-relative-molecular-mass micro-crosslinked poly (dimethyldiallylammonium chloride) | |
| CN107652446B (en) | Method for resource utilization of garbage concentrated solution | |
| CN111547830A (en) | Modified high-efficiency anionic flocculant and preparation method thereof | |
| CN109354380A (en) | A method of improving thickened sludge dewatering | |
| KR100834690B1 (en) | System for treating sludge to reduce chemical and production of cake | |
| CN109354379A (en) | A method of improving printing and dyeing sludge dewatering | |
| CN111018310A (en) | Preparation method of sludge conditioner | |
| CN114436500A (en) | Functional composite flocculant for sludge and preparation method thereof | |
| CN109354370A (en) | A method of being dehydrated sludge fast press-filtration | |
| CN109354363A (en) | A method of reducing thickened sludge resistivity | |
| CN106927548B (en) | Composite decoloring coagulant, preparation method and decoloring method thereof | |
| CN109354360A (en) | A method of accelerating thickened sludge dehydration | |
| WO2022233094A1 (en) | Hydrophobically modified cationic starch flocculants, preparation method therefor and application thereof | |
| CN111499155B (en) | Anti-freezing sludge deep dehydration conditioner and preparation and application methods thereof | |
| CN109354378A (en) | A kind of method of the quick filtering means dehydration of printing and dyeing sludge | |
| CN113354770A (en) | Liquid organic dehydrating agent and preparation method thereof | |
| CN109354362A (en) | A method of improving printing and dyeing industry dewatering performance of sludge |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
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 |
|
| CB02 | Change of applicant information | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190219 |
|
| WW01 | Invention patent application withdrawn after publication |