CN110054313A - A kind of viscose rayon acid waste water preprocess method - Google Patents
A kind of viscose rayon acid waste water preprocess method Download PDFInfo
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- CN110054313A CN110054313A CN201910495330.5A CN201910495330A CN110054313A CN 110054313 A CN110054313 A CN 110054313A CN 201910495330 A CN201910495330 A CN 201910495330A CN 110054313 A CN110054313 A CN 110054313A
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/101—Sulfur compounds
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/11—Turbidity
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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
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
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Abstract
The present invention provides a kind of viscose rayon acid waste water decoloration preprocess methods, it include: (1) stripping processing step: by viscose rayon acid waste water centralized collection to former pond, it is subsequently introduced in stripping pond and carries out stripping processing using stripping gas, the sour gas being dissolved in waste water is taken out of；(2) decolorization step: after stripping processing, waste water is handled through bleaching agent bleaching, and decolorising agent used can be adsorbent or oxidant etc., is removed by orange color substance in decolorization raw wastewater；(3) classified filtering step: after decolorization, using fine particle suspended matter in accurate filter removal liquid.The water quality of waste water is greatly improved after pre-processing above, and ultrafiltration and reverse osmosis performance and the cycle of operation are improved.
Description
Technical field
The present invention relates to technical field of waste water processing, in particular to a kind of viscose rayon acid waste water pretreatment side
Method.
Background technique
The acid waste water of viscose rayon plant emissions mostlys come from spinning refining workshop and acid station, including rushes Mao Shui, spinning machine
Ejected wash water, spinning ejected wash water, the washing filtering draining of acid station, outlet acid bath and post treatment acid wash water；Acid waste water contains concentration
Higher sulfuric acid and sodium sulphate, while also containing zinc sulfate, aluminum sulfate, carbon disulfide, hydrogen sulfide, dissolved organic matter, suspension
Object etc.；The characteristics such as this waste water salt content, COD content, sulfuric acid content and higher toxic gas content with higher, lead
Cause biochemical treatment difficulty larger, and treatment effect is unstable；Compared with traditional technique, it can be recycled using membrane separation technique useless
Salt and sulfuric acid in water reduce the wasting of resources, and treatment effeciency is high, low energy consumption.However, in the process using membrane separation process
In, it is found that the cycle of operation of film is very short, it is difficult to meet engineering demand；Mainly due to colloid and macromolecular soluble in waste water
Substance shows to be enriched with film, leads to flux depression quickly, water treatment capacity also declines therewith.Therefore, after pretreatment
Water quality be directly related to the service life and efficiency of film.
Based in the prior art, acid waste water is difficult to directly carry out film process, and the present invention is therefore.
Summary of the invention
The present invention is intended to provide a kind of viscose rayon acid waste water preprocess method, removes band colour substance in acid waste water
And most suspended substances, to solve the problems of the prior art.
To achieve the goals above, according to an aspect of the invention, there is provided a kind of viscose rayon acid waste water is located in advance
Reason method, it is characterised in that the described method includes:
1.1 stripping processing steps: it by viscose rayon acid waste water centralized collection to former pond, imported into stripping pond and carries out
Stripping processing, stripping time are controlled at 0.5~10 hour or more, and the sour gas being dissolved in waste water is taken out of；
1.2 decolorization steps: after stripping processing, waste water is handled through bleaching agent bleaching, by decolorization raw wastewater
In orange color substance be removed；
1.3 classified filtering steps: the clear liquid after decoloration is using fine particle suspended matter in accurate filter removal liquid；
The turbidity of waste water is controlled in 10NTU hereinafter, obtaining meeting the pretreatment acid waste water that ultrafiltration enters water bar part after filtering.
In preferred technical solution, the stripping gas being passed through in stripping pond in the step 1.1 is selected from compression or uncompressed
Air；The stripping Chi Ding is provided with gas gathering mask, for collecting sour gas.
In preferred technical solution, the decolorising agent that the decolorization of the step 1.2 uses is selected from adsorbent and/or oxidation
Agent, the adsorbent are selected from the combination of one or more of active carbon, aeroge, molecular sieve and montmorillonite, the adsorbent
The average grain diameter of particle is controlled in 20~200 mesh, and with mass/volume than calculating, and the additive amount of the adsorbent is no more than useless
The 0.1% of water inventory；The oxidant is selected from hydrogen peroxide.
In preferred technical solution, decolorization step includes that absorption is sequentially added in stirring pool in the step 1.2
Agent and flocculant, are thoroughly mixed；Adsorbent and flocculation is added in 5min or more in mixing time control after adsorbent is added
Mixing time control is in 1min or more after the composition of agent；Enter clarifying basin after stirring, the adsorbent rapid subsidence after flocculation is extremely
The step of bottom of pond.In preferred technical solution, the mass/volume proportion of the flocculant and acid waste water is not more than 20ppm.
In preferred technical solution, decolorization step includes that treated that waste water is passed through by stripping in the step 1.2
Resin extender tower sufficiently recycles, and guarantee waste water is in resin tower with resin contact time in 30min or more, collection resin tower discharge
Supernatant liquid the step of.In preferred technical solution, the resin uses macroreticular resin.
In preferred technical solution, decolorization step includes that hydrogen peroxide is added in stirring pool in the step 1.2, is filled
Divide and is stirred, step of the control mixing time in 1h or more.In preferred technical solution, the amount of hydrogen peroxide is added no more than useless
The 2.5% of water inventory, mixing time >=1h.
The specific viscose rayon acid waste water preprocess method of the present invention, specifically includes the following steps:
(1) stripping processing step:
By viscose rayon acid waste water centralized collection to former pond, it imported into stripping pond and is carried out at stripping using stripping gas
Reason, stripping time controlled more than a few hours, and the sour gas being dissolved in waste water is taken out of；
(2) decolorization step:
After stripping processing, waste water is handled through bleaching agent bleaching, and decolorising agent used can be adsorbent or oxidant etc., this hair
Main decolorising agent is respectively high-efficiency adsorbent or resin or hydrogen peroxide in bright, but is not limited only to the above decolorising agent, each decolorising agent
Usage is as follows:
Method 1 sequentially adds high-efficiency adsorbent and flocculant in stirring pool, is thoroughly mixed；High-efficiency adsorbent is added
Mixing time control afterwards in 5min or more, be added after the composition of adsorbent and flocculant mixing time control 1min with
On；Enter clarifying basin after stirring, the powdered absorbent rapid subsidence after flocculation to bottom of pond；
Method 2 is passed through resin extender tower and sufficiently recycles, guarantee waste water contact in resin tower with resin it is real-time between 30min with
On；
A certain amount of hydrogen peroxide is added in method 3 in stirring pool, is thoroughly mixed, and controls mixing time 1h or more.
(3) classified filtering step:
Clear liquid after decoloration is first through using fine particle suspended matter in accurate filter removal liquid；Accurate filter mistake
The turbidity of waste water is controlled in 10NTU hereinafter, obtaining meeting pre- place's acid waste water that ultrafiltration enters water bar part after filter.
In preferred technical solution, the gas being passed through in stripping pond in the step (1) is selected from compression or uncompressed
Air.
The stripping Chi Ding is provided with gas gathering mask, for collecting sour gas.
In preferred technical solution, in step (2) method 1 high-efficiency adsorbent be active carbon, aeroge, molecular sieve and
Montmorillonite etc. selects one such or multiple combinations, is used as much as possible the substance that specific surface area is big, bulk density is small and is used as and inhales
Attached dose.
In preferred technical solution, the use form of the high-efficiency adsorbent be selected from solid powdery, powder aqueous solution or
Person's fine grained dispersion liquid.
In preferred technical solution, the average grain diameter of the high-efficiency adsorbent particle is controlled in 20~200 mesh, and with matter
Amount/volume ratio calculates, and the additive amount of the adsorbent is not more than the 0.1% of waste water gross mass.
In preferred technical solution, the mass/volume of flocculant and acid waste water proportion is in step (2) method 1
No more than 20ppm.
It is macroreticular resin, the netted knot of macroreticular resin that resin is adsorbed in preferred technical solution, in step (2) method 2
Structure is more unfolded, and specific surface area is larger, can effectively be adsorbed macromolecular substances in water.
In preferred technical solution, the specifically used amount of hydrogen peroxide need to be true according to actual condition in step (2) method 3
It is fixed, ultrafiltration and reverse osmosis film wire can be excessively aoxidized, it is very few to will be unable to effectively aoxidize the substance for causing membrane to pollute in water.
In preferred technical solution, the water temperature of the viscose rayon acid waste water raw water is 50~98 DEG C, including sulfuric acid, sulphur
Sour sodium, zinc sulfate, aluminum sulfate, COD content >=500mg/L；The raw water of the viscose rayon acid waste water from spin practice between and
Acid station, including rush Mao Shui, spinning machine ejected wash water, spinning ejected wash water, the washing filtering draining of acid station, outlet acid bath and post treatment acid
Wash water.
The present invention provides a kind of viscose rayon acid waste water preprocess methods, belong to viscose rayon production field, especially
It is the process field of viscose rayon acid waste water.The technique, which can remove band colour substance, solubility in viscose fiber wastewater, to be had
Machine object, colloid and macromolecular substances reduce the operation burden of subsequent film filtering, reduce the backwash cycle of film, improve the performance of film
And operational efficiency.
The characteristics of preprocess method, is:
Waste water is delivered to progress stripping processing in stripping pond by pretreating process of the invention, then passes through decolorization,
The present invention mainly uses decolorising agent to adsorb or aoxidize soluble colloid in water for high-efficiency adsorbent, resin or hydrogen peroxide and divide greatly
Sub- substance by acid waste water Color removal, then through classified filtering, slows down the pollution speed of film, extends service life, improves
The performance and treatment effeciency of film.
" high-efficiency adsorbent+flocculant " system can stablize absorption water pollutant, and the time is short, high-efficient, but adsorb
High-efficiency adsorbent regenerability afterwards is poor；Resin has regenerability, after elution can reuse, however adsorption effect is lower than described
High-efficiency adsorbent；Using hydrogen peroxide for decoloration low efficiency, responding time is long, however simple process and low cost.Decolorization step is
This patent committed step is not limited only to the above discoloration method, and different decoloration process differences is larger, can be discharged according to different operating conditions
The requirement of water quality and economy voluntarily select.
Specifically, a kind of viscose rayon acid waste water preprocess method of the present invention, comprising the following steps:
(1) stripping processing step:
By viscose rayon acid waste water centralized collection to former pond, stripping pond is subsequently entered.In stripping pond be arranged many places every
Plate, reduces the back-mixing of water flow to the greatest extent, guarantees that raw water stripping time reaches a few hours, is dissolved in hydrogen sulfide in water, curing
The substances such as carbon are taken out of, and stripping Chi Ding is provided with gas gathering mask, the collection for sour gas；
(2) decolorization step:
Method 1: " high-efficiency adsorbent+flocculant " system carries out settlement treatment
" high-efficiency adsorbent+flocculant " system, which is included in stirring pool, is added high-efficiency adsorbent and flocculant and subsequent
Clarifying treatment.Many places partition is equally set in stirring pool, reduces the back-mixing of water flow to the greatest extent, several stirrings is set above pond
Device guarantees that waste water can stir a few hours in stirring pool；Suitable efficient absorption agent solution is added in stirring pool appropriate location
Suitable flocculant solution is added in stirring pool appropriate location in (powder aqueous solution, fine grained aqueous solution or solid powder carbon).Absorption
Agent and flocculant can be added simultaneously, can also be separately added into, and be thoroughly mixed after flocculant and high-efficiency adsorbent is added；Adsorbent
Mixing time is not preferably less than 5min, and mixing time is not preferably less than 1min after high-efficiency adsorbent and flocculant mixing.It subsequently enters clear
Clear slot, the adsorbent rapid subsidence after flocculation obtain the colourless or faint yellow clear liquid containing few suspended matter, reduce subsequent to slot bottom
The processing difficulty of accurate filter.
Method 2: resin adsorption processing
By step (1) stripping treated waste water enters stirring pool, 0.5~10h of mixing time enters tree after stir process
Rouge packed tower, waste water sufficiently recycle in packed tower, guarantee between waste water contact in resin tower with resin in real time >=30min, useless
Water color becomes colorless or faint yellow clear liquid.Resin can achieve the purpose that recycle by regenerated from washing, handle the resin of water
Dosage can be determined by specific operating condition.
Method 3: hydrogen peroxide oxidation processing
By step (1) stripping treated waste water enters stirring pool, it is added dioxygen water is not more than total Water 2.5%,
Mixing time >=1h is stirred, the longer decolorizing effect of hydrogen peroxide mixing time of same amount is better.When hydrogen peroxide and waste water are mixed
Between longer effect it is better, to give full play to the oxidation susceptibility of hydrogen peroxide, preferable decolorizing effect can be reached.
(3) classified filtering step:
Clarified solution further removes fine particle suspended matter in liquid using accurate filter, obtains pretreated useless
Water, turbidity are down to the requirement of ultrafiltration water inlet；It is pretreated waste water near colorless, as clear as crystal, there is minute quantity suspended matter.It is accurate
Filter may be selected millipore filter, tow filter device, bag filter any one or more, filter precision μ as far as possible≤20
m。
The viscose rayon acid waste water raw water is stood between spinning practice with acid, including is rushed Mao Shui, spinning machine ejected wash water, spun
Silk ejected wash water, the washing filtering draining of acid station, outlet acid bath and post treatment acid wash water.The viscose rayon acid waste water raw water
Water temperature is 50~98 DEG C, mainly contains sulfuric acid, sodium sulphate, zinc sulfate, aluminum sulfate, COD content >=500mg/L, but not limited to this.
The present invention is by stripping, decoloration, filtering, by acid waste water Color removal, while most of soluble colloid and big
Molecular substance is removed, and the cycle of operation and treatment effeciency of ultrafiltration and reverse osmosis membrane are greatly improved.
Specific embodiment
A specific embodiment of the invention provides a kind of viscose rayon acid waste water preprocess method comprising following step
It is rapid:
(1) stripping processing step:
By viscose rayon acid waste water centralized collection to former pond, it imported into stripping pond and is carried out at stripping using stripping gas
Reason, stripping time were controlled in a few hours, and the sour gas being dissolved in waste water is taken out of；
(2) decolorization step:
After stripping processing, waste water is handled through bleaching agent bleaching, and decolorising agent used can be adsorbent or oxidant etc., this hair
Main decolorising agent is is respectively high-efficiency adsorbent or resin or hydrogen peroxide in bright, but is not limited only to the above decolorising agent, each to decolourize
Agent usage is as follows:
Method 1: sequentially adding high-efficiency adsorbent and flocculant in stirring pool, is thoroughly mixed；Efficient absorption is added
Mixing time control after agent is in 5min or more, and mixing time control exists after the composition of high-efficiency adsorbent and flocculant is added
1min or more；Enter clarifying basin after stirring, the adsorbent rapid subsidence after flocculation to bottom of pond；
Method 2: being passed through resin extender tower and sufficiently recycle, 30min between guarantee waste water contacts in resin tower with resin in real time
More than；
Method 3: a certain amount of hydrogen peroxide being added in stirring pool, is thoroughly mixed, and controls mixing time 1h or more.
(3) classified filtering step:
Clear liquid after decoloration is using fine particle suspended matter in accurate filter removal liquid；After accurate filter filtering
The turbidity of waste water is controlled in 10NTU hereinafter, obtaining meeting pre- place's acid waste water that ultrafiltration enters water bar part.
Exhaust gas collector, the hydrogen sulfide and carbon disulfide that can will be generated in stripping pond are equipped at the top of step (1) stripping pond
It collects.
Many places partition is set in 1 stirring pool of step (2) method, reduces the back-mixing of water flow to the greatest extent, setting is several above pond
Blender guarantees that waste water can stir 0.5h or more in stirring pool；High-efficiency adsorbent is added in position, it is high being added
It imitates adsorbent downstream position appropriate and flocculant is added, high-efficiency adsorbent and flocculant can also be added simultaneously at this time, it can basis
Actual conditions adjustment.For the adsorption effect for sufficiently achieving adsorbent, guarantee that it there are enough residence times in waste water as far as possible.Cause
This, high-efficiency adsorbent mixing time is not preferably less than 5min, and mixing time is not preferably less than after high-efficiency adsorbent and flocculant mixing
1min。
Waste water after 2 stripping of method passes through resin extender tower, the height of packed tower and the amount of resin need to guarantee waste water energy with
Resin contact time >=30min, waste water are removed by resin tower color.Resin selects macropore tree as adsorbent material as far as possible
Rouge, resin adsorption can be eluted after being saturated by clear water, and the resin after elution can reuse again.
Waste water after 3 stripping of method enters stirring pool, and hydrogen peroxide is added in stirring pool and is sufficiently stirred, and the amount of hydrogen peroxide is added
No more than the 2.5% of waste water total amount, the color of mixing time >=1h, waste water is slowly taken off during stirring.
High-efficiency adsorbent used in step (2) method 1 selects as far as possible, and specific surface is big and the lesser substance of bulk density, Yi
Disperse in water, reaches preferable adsorption effect.The additive amount of high-efficiency adsorbent is no more than wastewater flow rate in step (2) method 1
0.1%, adsorbent is preferably powdered, and These powdered adsorbents can come into full contact with waste water, can be by the adsorption effect of adsorbent
It performs to best.
The effect of flocculant is by powder sorbent rapid subsidence in waste water, if powdered absorbent is straight in step (2) method 1
Connected accurate filter, it will cause accurate filter cleaning frequently, be unfavorable for longtime running.It has been investigated that in waste water
Powdered absorbent only need to add a small amount of flocculant i.e. and can reach good effect of settling, the additive amount of flocculant is not more than
20ppm。
Resin selects macroreticular resin as adsorbent material as far as possible in step (2) method 2, and macroreticular resin divides greatly in waste water
Sub- substance has preferable adsorption effect, and elutes and be easy, and regenerability is good.
Hydrogen peroxide oxidation decoloration need to be sufficiently stirred in step (2) method 3, react completely with waste water as far as possible, stir
Time can extend according to the specific additive amount of hydrogen peroxide and the extent of reaction.
The present invention is with acid waste water decoloration for pretreated main optimization link, and orange-yellow waste water passes through this side after stripping
After method processing, the liquid of near colorless is obtained using accurate filter；A large amount of colloid substance is removed in waste water, subsequent film
The performance of filtering and the cycle of operation are greatly improved, and shorten the cleaning frequency of film, improve film in Viscose Waste Water processing
Applicability.
Embodiment 1
The temperature of raw water is 88 DEG C or so, and the leaving water temperature by heat exchanger is 45 DEG C or so, into stripping pond, waste water
The hydrogen sulfide and carbon disulfide of middle dissolution are taken out of by stripping gas；Waste water is handled by the stripping of 2h, and turbidity is increased by 7NTU or so
To 23NTU or so, hydrogen sulfide and carbon disulfide total amount are down to 0.3mg/L or less by 4~12mg/L.
After the stripping of 2h, waste water enters stirring pool from overflow port, and the activity of waste water total amount 0.1% is added in stirring pool
Charcoal stirs 40min, and flocculant 15ppm is added, and continues to enter defecator after stirring 5min, sequentially enters filtering after clarifying 15min
The accurate filter that precision is 0.5 μm；Ultrafiltration and reverse osmosis is then sequentially entered, ultrafiltration operation 168h or more, which reaches backwash, to be wanted
It asks；It is reverse osmosis under conditions of 6MPa, run 72h flux depression 10% or so.
Embodiment 2
The temperature of raw water is 88 DEG C or so, and the leaving water temperature by heat exchanger is 45 DEG C or so, into stripping pond, waste water
The hydrogen sulfide and carbon disulfide of middle dissolution are taken out of by stripping gas；Waste water is handled by the stripping of 2h, and turbidity is increased by 7NTU or so
To 23NTU or so, hydrogen sulfide and carbon disulfide total amount are down to 0.3mg/L or less by 4~12mg/L.
Waste water is after stripping with 2m3The amount of/h or so is passed through 2m3Resin extender tower, resin extender tower enters filtering accuracy and is
0.5 μm of accurate filter, subsequently enters ultrafiltration and reverse osmosis, and ultrafiltration operation 150h or more reaches backwash requirement；It is reverse osmosis
Under conditions of 6MPa, 72h flux depression 20% or so is run.
Embodiment 3
The temperature of raw water is 88 DEG C or so, and the leaving water temperature by heat exchanger is 45 DEG C or so, into stripping pond, waste water
The hydrogen sulfide and carbon disulfide of middle dissolution are taken out of by stripping gas；Waste water is handled by the stripping of 2h, and turbidity is increased by 7NTU or so
To 23NTU or so, hydrogen sulfide and carbon disulfide total amount are down to 0.3mg/L or less by 4~12mg/L.
Waste water enters stirring pool, and the hydrogen peroxide of waste water total amount 1/50 is added, after stirring 6h, waste water face during stirring
Color gradually takes off；Treated, and waste water passes through the accurate filter that filtering accuracy is 0.5 μm, subsequently enters the super of film upgrading unit
Filter and reverse osmosis unit.The content < 0.1% of hydrogen peroxide is detected in waste water before entering ultrafiltration, ultrafiltration runs 180h or more
Reach backwash requirement；It is reverse osmosis under conditions of 6MPa, run 72h flux depression 10% or so.
Comparative example 1
The temperature of raw water is 88 DEG C or so, and the leaving water temperature by heat exchanger is 45 DEG C or so, into stripping pond, waste water
The hydrogen sulfide and carbon disulfide of middle dissolution are taken out of by stripping gas；Waste water is handled by the stripping of 2h, and turbidity is increased by 7NTU or so
To 23NTU or so, hydrogen sulfide and carbon disulfide total amount are down to 0.3mg/L or less by 4~12mg/L.
Waste water enters the accurate filter that filtering accuracy is 0.5 μm after stripping, subsequently enters ultrafiltration and reverse osmosis, ultrafiltration fortune
Left and right reaches backwash requirement to row for 24 hours；It is reverse osmosis under conditions of 6MPa, operation flux depression 37% or so for 24 hours.
It can be seen that this waste water is after three kinds of decolorizations, band colour substance and most of soluble colloid in waste water
With macromolecular substances by by absorption or oxidation removal, the cycle of operation and treatment effeciency of ultrafiltration and reverse osmosis membrane obtain very big
Promotion.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of viscose rayon acid waste water preprocess method, it is characterised in that the described method includes:
1.1 stripping processing steps: by viscose rayon acid waste water centralized collection to former pond, it imported into progress stripping in stripping pond
Processing, stripping time are controlled in 0.5~10h, and the sour gas being dissolved in waste water is taken out of；
1.2 decolorization steps: after stripping processing, waste water is handled through bleaching agent bleaching, by orange in decolorization raw wastewater
Yellow substance is removed；
1.3 classified filtering steps: the clear liquid after decoloration is using fine particle suspended matter in accurate filter removal liquid；Filtering
The turbidity of waste water is controlled in 10NTU hereinafter, obtaining meeting the pretreatment acid waste water that ultrafiltration enters water bar part afterwards.
2. a kind of viscose rayon acid waste water preprocess method according to claim 1, which is characterized in that the step
The stripping gas being passed through in stripping pond in 1.1 is selected from compression or uncompressed air；The stripping Chi Ding is provided with gas gathering mask, uses
In collection sour gas.
3. a kind of viscose rayon acid waste water preprocess method according to claim 1, which is characterized in that the step
The decolorising agent that 1.2 decolorization uses is selected from adsorbent and/or oxidant, and the adsorbent is selected from active carbon, aeroge, divides
The combination of one or more of son sieve and montmorillonite, the average grain diameter of the absorbent particles are controlled in 20~200 mesh, and with
For mass/volume than calculating, the additive amount of the adsorbent is not more than the 0.1% of waste water total amount；The oxidant is selected from hydrogen peroxide.
4. a kind of viscose rayon acid waste water preprocess method according to claim 1, which is characterized in that the step
Decolorization step includes that adsorbent and flocculant are sequentially added in stirring pool in 1.2, is thoroughly mixed；Adsorbent is added
Mixing time control afterwards in 5min or more, be added after the composition of adsorbent and flocculant mixing time control 1min with
On；Enter clarifying basin after stirring, the step of adsorbent rapid subsidence to bottom of pond after flocculation.
5. a kind of viscose rayon acid waste water preprocess method according to claim 4, which is characterized in that the flocculant
It is not more than 20ppm with the mass/volume proportion of acid waste water.
6. a kind of viscose rayon acid waste water preprocess method according to claim 1, which is characterized in that the step
Decolorization step includes that treated that waste water is passed through resin extender tower sufficiently recycles by stripping in 1.2, guarantees waste water in resin
With resin contact time in 30min or more in tower, the step of collecting the supernatant liquid of resin tower discharge.
7. a kind of viscose rayon acid waste water preprocess method according to claim 1, which is characterized in that the step
Decolorization step includes that hydrogen peroxide is added in stirring pool in 1.2, is thoroughly mixed, and controls mixing time 1h's or more
Step.
8. a kind of viscose rayon acid waste water preprocess method according to claim 1, which is characterized in that the step
The turbidity of waste water is controlled in 10NTU hereinafter, filtering accuracy≤20 μm after accurate filter filtering in 1.3；Accurate filter is selected from
Millipore filter, tow filter device, bag filter any one or more, filtering requirement need to meet ultrafiltration requirement used into
Water bar part.
9. a kind of viscose rayon acid waste water preprocess method according to claim 1, which is characterized in that the viscose glue is fine
The water temperature for tieing up acid waste water raw water is 50~98 DEG C, including sulfuric acid, sodium sulphate, zinc sulfate, aluminum sulfate, COD content >=500mg/
L。
10. a kind of viscose rayon acid waste water preprocess method according to claim 1, which is characterized in that the viscose glue
The raw water of fibrillary acidic waste water is stood between spinning practice with acid, including is rushed Mao Shui, spinning machine ejected wash water, spinning ejected wash water, acid and stood
Washing filtering draining, outlet acid bath and post treatment acid wash water.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1880238A (en) * | 2005-06-16 | 2006-12-20 | 国家海洋局杭州水处理技术开发中心 | Air purification cooling waste water treatment method for viscose glue fiber workshop |
| CN105110575A (en) * | 2015-09-28 | 2015-12-02 | 天津市环境保护科学研究院 | Viscose industry waste water treating method and device |
| CN207933209U (en) * | 2017-12-28 | 2018-10-02 | 江苏久吾高科技股份有限公司 | A kind of middle water zero discharge processing unit |
| CN109293112A (en) * | 2018-10-17 | 2019-02-01 | 新疆中泰创新技术研究院有限责任公司 | A kind of processing method of viscose rayon acid waste water resource utilization |
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2019
- 2019-06-10 CN CN201910495330.5A patent/CN110054313A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1880238A (en) * | 2005-06-16 | 2006-12-20 | 国家海洋局杭州水处理技术开发中心 | Air purification cooling waste water treatment method for viscose glue fiber workshop |
| CN105110575A (en) * | 2015-09-28 | 2015-12-02 | 天津市环境保护科学研究院 | Viscose industry waste water treating method and device |
| CN207933209U (en) * | 2017-12-28 | 2018-10-02 | 江苏久吾高科技股份有限公司 | A kind of middle water zero discharge processing unit |
| CN109293112A (en) * | 2018-10-17 | 2019-02-01 | 新疆中泰创新技术研究院有限责任公司 | A kind of processing method of viscose rayon acid waste water resource utilization |
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