CN109368982A - A kind of method of continuous floatation thickening textile printing and dyeing sludge - Google Patents
A kind of method of continuous floatation thickening textile printing and dyeing sludge Download PDFInfo
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- CN109368982A CN109368982A CN201811552042.0A CN201811552042A CN109368982A CN 109368982 A CN109368982 A CN 109368982A CN 201811552042 A CN201811552042 A CN 201811552042A CN 109368982 A CN109368982 A CN 109368982A
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- sludge
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- 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
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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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/30—Nature of the water, waste water, sewage or sludge to be treated from the textile industry
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Treatment Of Sludge (AREA)
Abstract
A kind of method of continuous floatation thickening textile printing and dyeing sludge, comprising the following steps: the printing and dyeing sludge after pre-concentration is pumped into reactor tank, acid is added into reactor tank level-one mixing section, conditioning of mud pH is 4-6, and sludge overflow later enters second level mixing section；Temperature-responsive aqueous high molecular copolymer reaction 5-30min is added into reactor tank second level mixing section；Sludge is pumped into preheating can after reaction, and overflow enters heating tank heating after being preheated by heat exchange, elevates the temperature to the Tg or more of temperature-responsive aqueous high molecular copolymer, keeps the temperature 5-30min；Sludge overflow enters air floatation machine progress floatation thickening in heating tank, removes filtering means dehydration after thickened sludge discharge is cooling, and the water being concentrated out after air bearing is back to heat exchange tank for the sludge after pre- thermal response, recycles thermal energy.
Description
Technical field
The invention belongs to the sewage in environmental protection, technical field of sludge treatment, in particular to a kind of continuous floatation thickening
The method of textile printing and dyeing sludge.
Background technique
A large amount of sludge can be generated in sewage disposal process, volume is big, and moisture content is high, typically up to 98-99%, therefore
The dehydration of sludge is always global problem.It is mechanical when being carried out using plate and frame filter press, belt type dewaterer or centrifugal dehydrator etc.
Rate of water loss is slow when the solid-liquid separating methods such as dehydration or vacuum dehydration are dehydrated, and dewatering time is long.
The minimizing of sludge volume is one of vital task of Treatment of Sludge, therefore usually requires first to carry out before sludge dewatering
Concentration to reduce sludge volume, but usually contains a large amount of organic matter in textile printing and dyeing sludge, such as starch, modified shallow lake
Powder, polyvinyl alcohol, sodium alginate, adhesive etc., hydrophily is strong, and viscosity is big, dense using conventional sludge in conjunction with water content height
Contracting technology such as precipitation concentration, floatation thickening are difficult to reach good concentrated effect.It is low that there are cycles of concentration, reduction difference etc.
Problem, sludge volume is still huge after concentration, and some sludge is even difficult to floatation thickening, and sludge specific resistance is high, and sludge is de-
Water is difficult.
Summary of the invention
The purpose of the present invention is to provide a kind of methods of continuous floatation thickening textile printing and dyeing sludge, improve sludge volume and subtract
Quantization degree is concentrated sludge high power, and reduces the resistivity of thickened sludge, improves sludge dewatering speed.
To realize above-mentioned goal of the invention, the technical method that the present invention uses are as follows:
A kind of method of continuous floatation thickening textile printing and dyeing sludge, which is characterized in that pH and temperature-responsive are added into sludge
Aqueous high molecular copolymer is precipitated by responding reaction to pH, then is become to the response of temperature by temperature with copolymer molecule chain
Change and change its physical state, realizes the concentration of sludge, comprising the following steps:
(1) printing and dyeing sludge after preformed precipitate being concentrated is pumped into reactor tank, adds acid into reactor tank level-one mixing section, stirring is filled
Point, conditioning of mud pH is 4-6, and sludge overflow later enters the dispensing mixing of second level mixing section；
(2) pH of glass transition temperature (Tg) higher than 10-40 DEG C of room temperature and temperature is added into reactor tank second level mixing section while stirring
Responsiveness aqueous high molecular copolymer is spent, dosage is 2-10g/L sludge, and overflow enters conversion zone reaction 5- after mixing completely
30min, the H generated using acid ionization+In conjunction with the water soluble group of copolymer, by ion exchange formation-COOH,
And inhibit its ionization, the solubility of copolymer is reduced, copolymer molecule is precipitated sufficiently and passes through Van der Waals force with mud granule
Effect absorption combines；
(3) sludge is pumped into preheating can by sludge pump after reacting, and overflow enters heating tank and heated after being preheated by heat exchange, makes
Temperature is increased to Tg or more the 5-20 DEG C of pH Yu temperature-responsive aqueous high molecular copolymer, changes its physical state, makes to be copolymerized
The curling of object molecular chain movement, keeps the temperature 5-30min, makes to crimp with the copolymer molecule chain movement that mud granule adsorbs using heat effect
Mud granule is driven to reunite together, contraction distortion improves the hydrophobicity of mud granule by the hydrophobic grouping in copolymer, improves
Concentrated effect；
(4) sludge overflow enters air floatation machine progress floatation thickening in heating tank, and thickened sludge is discharged by sludge pipe at the top of air floatation machine,
The water being concentrated out after air bearing, for the sludge after pre- thermal response, recycles thermal energy by reflux sewage pump continuous backflow to heat exchange tank,
Then drain into waste water treatment system；
(5) concentration paste sludge is cooled below pH and temperature-responsive aqueous high molecular copolymer Tg hereinafter, making to be copolymerized
Object changes physical state and reverts to glassy state, and hole between the mud granule that hardening rear support is formed reduces sludge specific resistance, then goes
Filtering means dehydration.
The utility model has the advantages that
A. the aqueous high molecular copolymer that the glass transition temperature (Tg) formed with acid out in water phase is higher than room temperature passes through to temperature
The variation for responding the generation physical state above and below glass transition temperature realizes that sludge-heat preservation drilling-hardening branch is cohered in softening absorption
Permeable pore canal role is supportted, the sludge for being difficult to be concentrated is concentrated further, reduction is obvious, and sludge volume can be reduced to 30%
Hereinafter, cycles of concentration improves 4 times or more than conventional precipitation concentration method, 2 times or more is improved than conventional floatation thickening method.
B. microbubble reduces solid-liquid contact in mud granule surface formation gas, liquid, solid three-phase contact interface when air bearing, and
Change the surface property of sludge by gas-liquid-solid three-phase interface, and concentration water outlet is made to sink to forming water layer by gravity, improves dense
Contracting effect.
C. be heated rear copolymer strand in soft segment the effect of rolling up, mud granule high degree of agglomeration can be driven and become
Shape is shunk, and is made sludge condensation and is formed hole between mud granule, and dehydration duct when filtering means dehydration is constituted
D. the carboxyl in pH and temperature-responsive copolymer being precipitated can be acted on the hydrophilic group of mud granule, reduce sludge
Active force between grain and water, while the hydrophobic groupings such as methyl, ethyl, ester group in copolymer further increase mud granule
Hydrophobicity reduces the content for combining water in thickened sludge, is conducive to sludge condensation.
E. pH and temperature-responsive aqueous high molecular copolymer are converted to hole between glassy state after-hardening support mud granule
Gap, sludge pore deformation, collapsing when can reduce filtering means dehydration, sludge specific resistance can be reduced to original 10% hereinafter, by difficulty after concentration
Filter sludge is transformed into easy filter sludge, and filtering velocity is accelerated, and shortens filtration time.
Detailed description of the invention
Fig. 1 is the process flow chart of thickened sludge.
Specific embodiment
1 the present invention is further illustrated by specific embodiment with reference to the accompanying drawing.
Embodiment 1
(1) precipitating sludge that the treatment of dyeing wastewater after preformed precipitate being concentrated for 24 hours generates is pumped into reactor tank, to reactor tank level-one
Acid is added in mixing section, sufficiently, conditioning of mud pH is 5.0 for stirring, and sludge overflow later enters the dispensing mixing of second level mixing section；
(2) pH of glass transition temperature (Tg) higher than 30 DEG C of room temperature is added into reactor tank second level mixing section while stirring and temperature is rung
Answering property aqueous high molecular copolymer, dosage are 4g/L sludge, and overflow enters conversion zone reaction 10min after mixing completely, are utilized
The H that acid ionization generates+In conjunction with the water soluble group of the copolymer of addition, by ion exchange formation-COOH, and press down
Its ionization is made, the solubility of copolymer is reduced, copolymer molecule is precipitated sufficiently and passes through van der Waals interaction with mud granule
Absorption combines；
(3) sludge is pumped into preheating can by sludge pump after reacting, and overflow enters heating tank and heated after being preheated by heat exchange, makes
Temperature is increased to 5 DEG C of Tg or more of copolymer, crimps copolymer molecule chain movement, keeps the temperature 30min, is made and dirt using heat effect
The copolymer molecule chain movement curling of mud granular absorption drives mud granule to reunite together, contraction distortion, by copolymer
Hydrophobic grouping improves the hydrophobicity of mud granule, improves concentrated effect；
(4) dirty overflow enters air floatation machine progress floatation thickening in heating tank, and thickened sludge air floatation machine is discharged by top sludge pipe, gas
The water being concentrated out after floating, for the sludge after pre- thermal response, recycles thermal energy, so by reflux sewage pump continuous backflow to heat exchange tank
After be discharged into waste water treatment system；
(5) thickened sludge is cooled below pH and temperature-responsive aqueous high molecular copolymer Tg hereinafter, turning copolymer
Become glassy state, hole between the mud granule that hardening rear support is formed reduces sludge specific resistance, then removes filtering means dehydration.
Embodiment 2
(1) precipitating sludge that the treatment of dyeing wastewater after preformed precipitate being concentrated for 24 hours generates is pumped into reactor tank, to reactor tank level-one
Acid is added in mixing section, sufficiently, conditioning of mud pH is 4.5 for stirring, and sludge overflow later enters the dispensing mixing of second level mixing section；
(2) pH of glass transition temperature (Tg) higher than 30 DEG C of room temperature is added into reactor tank second level mixing section while stirring and temperature is rung
Answering property aqueous high molecular copolymer, dosage are 8g/L sludge, and overflow enters conversion zone reaction 20min after mixing completely, are utilized
The H that acid ionization generates+In conjunction with the water soluble group of the copolymer of addition, by ion exchange formation-COOH, and press down
Its ionization is made, the solubility of copolymer is reduced, copolymer molecule is precipitated sufficiently and passes through van der Waals interaction with mud granule
Absorption combines；
(3) sludge is pumped into preheating can by sludge pump after reacting, and overflow enters heating tank and heated after being preheated by heat exchange, makes
Temperature is increased to 10 DEG C of Tg or more of copolymer, make copolymer molecule chain movement crimp, keep the temperature 20min, using heat effect make with
The copolymer molecule chain movement curling of mud granule absorption drives mud granule to reunite together, contraction distortion, by copolymer
Hydrophobic grouping improve mud granule hydrophobicity, improve concentrated effect；
(4) dirty overflow enters air floatation machine progress floatation thickening in heating tank, and thickened sludge air floatation machine is discharged by top sludge pipe, gas
The water being concentrated out after floating, for the sludge after pre- thermal response, recycles thermal energy, so by reflux sewage pump continuous backflow to heat exchange tank
After be discharged into waste water treatment system；
(5) thickened sludge is cooled below pH and temperature-responsive aqueous high molecular copolymer Tg hereinafter, turning copolymer
Become glassy state, hole between the mud granule that hardening rear support is formed reduces sludge specific resistance, then removes filtering means dehydration.
Embodiment 3
(1) precipitating sludge that the treatment of dyeing wastewater after preformed precipitate being concentrated for 24 hours generates is pumped into reactor tank, to reactor tank level-one
Acid is added in mixing section, sufficiently, conditioning of mud pH is 4.0 for stirring, and sludge overflow later enters the dispensing mixing of second level mixing section；
(2) pH of glass transition temperature (Tg) higher than 30 DEG C of room temperature is added into reactor tank second level mixing section while stirring and temperature is rung
Answering property aqueous high molecular copolymer, dosage are 10g/L sludge, and overflow enters conversion zone reaction 30min after mixing completely, are utilized
The H that acid ionization generates+In conjunction with the water soluble group of the copolymer of addition, by ion exchange formation-COOH, and press down
Its ionization is made, the solubility of copolymer is reduced, copolymer molecule is precipitated sufficiently and passes through van der Waals interaction with mud granule
Absorption combines；
(3) sludge is pumped into preheating can by sludge pump after reacting, and overflow enters heating tank and heated after being preheated by heat exchange, makes
Temperature is increased to 20 DEG C of Tg or more of pH and temperature-responsive aqueous high molecular copolymer, crimps copolymer molecule chain movement,
10min is kept the temperature, crimps to drive using the copolymer molecule chain movement that heat effect makes with mud granule adsorbs and be rolled into a ball together with mud granule
Poly-, contraction distortion improves the hydrophobicity of mud granule by the hydrophobic grouping in copolymer, improves concentrated effect；
(4) dirty overflow enters air floatation machine progress floatation thickening in heating tank, and thickened sludge air floatation machine is discharged by top sludge pipe, gas
The water being concentrated out after floating, for the sludge after pre- thermal response, recycles thermal energy, so by reflux sewage pump continuous backflow to heat exchange tank
After be discharged into waste water treatment system；
(5) thickened sludge is cooled below pH and temperature-responsive aqueous high molecular copolymer Tg hereinafter, turning copolymer
Become glassy state, hole between the mud granule that hardening rear support is formed reduces sludge specific resistance, then removes filtering means dehydration.
Rear textile printing and dyeing sludge is further concentrated pre-concentration through this method for 24 hours, and volume reduction is obvious, after concentration
Sludge shows that compared with raw sewage, rate of water loss is obviously accelerated through vacuum filtration dehydration test result, reaches identical sludge and contains
Water rate, dewatering time can be shorten within original 20%, 90% or more sludge specific resistance decline.Specific sludge reduction and sludge ratio
Test result is as follows shown in table for resistance:
Sludge condensation reduction and resistivity test result
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto, and it is any
Those skilled in the art in the technical scope disclosed by the present invention, according to the technical scheme of the invention and its inventive conception
It 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 continuous floatation thickening textile printing and dyeing sludge, which is characterized in that add pH and temperature-responsive into sludge
Property aqueous high molecular copolymer, first passing through response pH reaction is precipitated, then passes through temperature to the response of temperature with copolymer molecule chain
Variation changes its physical state, realizes the concentration of sludge, comprising the following steps:
(1) printing and dyeing sludge after pre-concentration being pumped into reactor tank, acid is added into reactor tank level-one mixing section, stirring is abundant,
Conditioning of mud pH is 4-6, and sludge overflow later enters the dispensing mixing of second level mixing section；
(2) pH of glass transition temperature (Tg) higher than 10-40 DEG C of room temperature and temperature is added into reactor tank second level mixing section while stirring
Responsiveness aqueous high molecular copolymer is spent, overflow enters conversion zone reaction 5-30min after mixing completely, generates using acid ionization
H+In conjunction with the water soluble group of copolymer, by ion exchange formation-COOH, and inhibit its ionization, reduces copolymer
Solubility, make copolymer molecule be sufficiently precipitated and with mud granule by van der Waals interaction absorption combined；
(3) sludge is pumped into preheating can by sludge pump after reacting, and overflow enters heating tank and heated after being preheated by heat exchange, makes
Temperature is increased to Tg or more the 5-20 DEG C of pH Yu temperature-responsive aqueous high molecular copolymer, changes its physical state, makes to be copolymerized
The curling of object molecular chain movement, keeps the temperature 5-30min, makes to crimp with the copolymer molecule chain movement that mud granule adsorbs using heat effect
Mud granule is driven to reunite together, contraction distortion improves the hydrophobicity of mud granule by the hydrophobic grouping in copolymer, improves
Concentrated effect；
(4) sludge overflow enters air floatation machine progress floatation thickening in heating tank, and thickened sludge at the top of air floatation machine by being discharged, after air bearing
The water being concentrated out, for the sludge after pre- thermal response, is recycled thermal energy, then arranged by reflux sewage pump continuous backflow to heat exchange tank
Enter waste water treatment system；
(5) concentration paste sludge is cooled below pH and temperature-responsive aqueous high molecular copolymer Tg hereinafter, making to be copolymerized
Object changes physical state and reverts to glassy state, and hole between the mud granule that hardening rear support is formed reduces sludge specific resistance, then goes
Filtering means dehydration.
2. a kind of method of continuous floatation thickening textile printing and dyeing sludge according to claim 1, which is characterized in that the step
Suddenly the acid in (1) is inorganic acid or organic acid, and degree of ionization should be greater than carboxylic acid group in temperature-responsive aqueous high molecular copolymer
Degree of ionization, preferred inorganic acid.
3. a kind of method of continuous floatation thickening textile printing and dyeing sludge according to claim 1, which is characterized in that the step
Suddenly in (2) pH and temperature-responsive aqueous high molecular copolymer by monomer methyl acrylate, methyl methacrylate, acrylic acid second
Ester, butyl acrylate, Isooctyl acrylate monomer, acrylic acid, acrylonitrile, styrene, methacrylic acid, butadiene, in acrylamide
Several copolymerization formed, and Tg is regulated and controled by monomer mole ratio.
4. a kind of method of continuous floatation thickening textile printing and dyeing sludge according to claim 1, which is characterized in that the step
Suddenly the preheating can heating in (3) uses any one of pipe type heat transfer or plate-type heat-exchange mode.
5. a kind of method of continuous floatation thickening textile printing and dyeing sludge according to claim 1, which is characterized in that the step
Suddenly the heating tank heating in (3) is using electric heating, steam heating, any indirect heating manner in heat-conducting oil heating or its joint
Heating method.
6. a kind of method of continuous floatation thickening textile printing and dyeing sludge according to claim 1, which is characterized in that the step
Suddenly the air floatation machine in (4) is any one of conventional gas distribution air floatation machine, jet air float machine or dissolved gas floatator, preferably air-dissolving air-float
Machine.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811552042.0A CN109368982A (en) | 2018-12-18 | 2018-12-18 | A kind of method of continuous floatation thickening textile printing and dyeing sludge |
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| CN201811552042.0A CN109368982A (en) | 2018-12-18 | 2018-12-18 | A kind of method of continuous floatation thickening textile printing and dyeing sludge |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51126969A (en) * | 1975-04-30 | 1976-11-05 | Kurita Water Ind Ltd | A method of dehydrating activated sludge |
| JPS58131200A (en) * | 1982-01-29 | 1983-08-04 | Unitika Ltd | Treatment of 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 |
| CN106608709A (en) * | 2015-10-27 | 2017-05-03 | 禾华环保科技（上海）有限公司 | Dehydrating agent for sludge, and preparation and application thereof |
| WO2018022352A1 (en) * | 2016-07-25 | 2018-02-01 | Dow Global Technologies Llc | Acoustic mixing for flocculant addition to mineral suspensions |
-
2018
- 2018-12-18 CN CN201811552042.0A patent/CN109368982A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51126969A (en) * | 1975-04-30 | 1976-11-05 | Kurita Water Ind Ltd | A method of dehydrating activated sludge |
| JPS58131200A (en) * | 1982-01-29 | 1983-08-04 | Unitika Ltd | Treatment of 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 |
| CN106608709A (en) * | 2015-10-27 | 2017-05-03 | 禾华环保科技（上海）有限公司 | Dehydrating agent for sludge, and preparation and application thereof |
| WO2018022352A1 (en) * | 2016-07-25 | 2018-02-01 | Dow Global Technologies Llc | Acoustic mixing for flocculant addition to mineral suspensions |
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 * |
| 王淑荣等: "《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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Application publication date: 20190222 |