CN105152425A - Regeneration and cyclic utilization method for linen laundry wastewater - Google Patents
Regeneration and cyclic utilization method for linen laundry wastewater Download PDFInfo
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Abstract
The invention relates to a method for regeneration and cyclic utilization of laundry wastewater. By way of combining direct reuse of laundry wastewater and regeneration and cyclic utilization, the laundry wastewater is treated, comprising course treatment and front-end treatment. The course treatment means that rinse water in a laundry process flow is directly reused in form of countercurrent rinsing. By designing an operating system where the rinse water continuously flows in a semi-intermittent manner and the washed matters are intermittent for an independently operated intermittent industrial washing machine, a water use flow of countercurrent rinsing of the rinse water is realized, the wastewater amount of a rinsing stage is reduced, and 50-70% of fresh water dosage can be saved. The front-end treatment means that wastewater generated in pre-washing and principle-washing in laundry production is independently collected and treated, and the treated water after flocculation, centrifugal separation and filtration is used in pre-washing, principle-washing and rinsing, so that the reuse rate reaches 80%; the laundry wastewater regeneration and cyclic utilization system established by combining the technologies of course treatment and front-end treatment comprehensively saves over 80% of fresh water dosage.
Description
Technical field
The present invention relates to a kind of for laundrywastes cyclic utilization method, mainly can be used for the recycling utilization of the laundrywastes of the intermittent type industry washer discharge of independent operating in laundry industry.
Background technology
China is one of 12 countries and regions of serious water shortage in the world, and according to statistics in 2008, China's gross amount of water resources was 27434.3 billion cubic meters, water resource of per capita 2071.1 cubic metres, be only 1/4 of world average level, arrange the 110th, the whole nation is 5910.0 billion cubic meters for water inventory.In 20 end of the centurys, the whole nation has more than 400 city to there is insufficient water phenomenon in more than 600 city, and national water deficit reaches 400 billion cubic meters, and the city of nearly 2/3 exists lack of water in various degree.Whole nation surface water pollution is still comparatively serious, and seven large Drainage Water Qualities are totally intermediate pollution, and lake (reservoir) eutrophication problem is given prominence to; Groundwater quality is totally better, some areas water quality deterioration.Water pollutions adds that water shortage causes water resources crisis.
Clothes laundering and dyeing trade is the novel industry that development in recent years is got up.Based on the gesture that life clothing and the cleaning such as washing, flatiron, dyeing, darning of public textiles, the laundering and dyeing trade of maintenance are fast development.By 2009, total about 250,000, laundry (factory), the whole nation, annual revenue reached more than 500 hundred million yuan, and practitioner exceedes 1,200,000.Laundering and dyeing trade also also exists some problems that need solve: industry standard system is unsound, skilled worker lacks, wash dyeing equipment backwardness relative to quality monitoring means, modernization level is not high, larger etc. with the national gap being in international laundering and dyeing trade top standard such as American-European, Japanese in washing quality and service and technology etc.
Laundry service is as the social service trades matched with dress and personal adornment, inseparable with daily life.Along with Economic development and growth in the living standard, the socialization of housework is more extensive; It is bright and colourful that scientific and technical progress more makes dress and personal adornment constantly weed out the old and bring forth the new; These factors bring the demand to professional laundry service, also for the development of laundry service provides the wide market space.
The governance process of laundrywastes mainly contains three approach: watershed management, and process is administered and end treatment.
Laundrywastes watershed management, the most basic method is without water washing.Conventional clothes washing method has washing and dry-cleaning two classes.Wash with emulsion process laundry the most general, emulsion process laundry mainly utilizes tensio-active agent to the moistening dispersion of the dirt bits of oil material and adhesion, solubilising, emulsifying effect, realizes the purification of clothing.Grease on fabric and oil soluble dirt are directly dissolved in dry-cleaning then multiplex organic solvent, but can not remove water-soluble impurity and spot.Washing can not only wash away greasy dirt, dust etc. on fabric, well can also change the feel of clothing.Therefore, there is larger limitation by the method for dry-cleaning as the means of laundrywastes watershed management.
Process is administered, namely in laundry processes, make the generation of waste water reduce, as countercurrent rinsing, remove the water-saving washing Technology that on textiles, loose colour uses in printing and dyeing enterprise dyeing and finishing processing, continuous processing device adopts countercurrent rinsing, the trend of water and textiles move towards opposed on processing unit (plant), as: textiles trend is through two afterwards from rinsing machine first groove, three, fourth class groove runs, and clear water injects from last groove of rinsing machine, as entered from the 4th groove, successively along three, two, one groove runs, medicament in each washing bath or concentration of wastewater, strengthen successively to the first groove from the 4th groove, water between each washing bath directly enters next tank along flowing to be left intact.Therefore countercurrent rinsing belongs to the system that material and current run all continuously, and what adopt between each tank in this system is that waste water direct reuse mode is carried out, and is the mode that printing and dyeing enterprise generally adopts.In Xi Ran enterprise, what adopt this water-saving technology of countercurrent rinsing is continuous batch washer, its technological process utilizes the rotating cage be connected continuously, the cage that fallen successively by substrate (as cloth grass, towel) runs from front to back, current are then from back to front against the flowing of substrate operation scheme, and medicament and concentration of wastewater also strengthen gradually along current direction from back to front.Order batch is had at the substrate of each rotating cage, first substrate as the washing of the 4th cage last clear water wash after water, be directly used in second from the bottom cleaning of the 3rd cage second batch substrate, water after washing specifically enters third from the bottom the cleaning of the second cage for the 3rd batch of substrate, discharges afterwards.Continuous batch washer is realize two-way flow with semi-batch mode between material and current, and namely each cleaning is intermittent mode, between twice by mechanism by substrate automatic pouring cage, water flows directly in front cage.Also be waste water direct reuse between each cage, run although material and current are semi-batch mode between each cage, continuous batch washer also achieves carrying out continuously of material and washing generally, and efficiency declines to some extent than the continuous washing machine of printing and dyeing enterprise.But continuous batch washer is than other washing plant of Xi Ran enterprise, belong to throughput large, personnel's recruitment is few, the equipment of production efficiency advanced person.At present in China, because Xi Ran enterprise ability to receive orders is not enough, and with the problems such as being connected of working and resting of hotel, continuous batch washer is made often to be in the state of not producing at full capacity, can not run for 7 × 24 hours, causing producing and decline to a great extent compared with equipment de-sign ability with water saving efficiency, so the Xi Ran enterprise that China is most, is for the means of production with the intermittent type industry washer of independent operating.The car washing installation of this type, washing each time, rinsing are disregarded waste concentration height in water and are all discharged, and do not recycle.The laundrywastes discharge of current washing enterprise, medium and small sized enterprises enter urban sewage treatment system with sanitary sewers, and large-lot producer discharges after carrying out water treatment.Washing industry water resources expends greatly, does not substantially have reuse.Within 2010, the deficient breach of Water Resources In The City of Beijing reaches 11.8 billion cubic meters/year, and the dye industry current water consumption total amount of washing of Beijing exceedes annual 1 billion cubic meter, if laundrywastes recycling utilization water-saving technology can be popularized in an all-round way, water resources breach will be made up and be no less than 0.8 billion cubic meter/year.The use water of about 50% ~ 70% can be saved whole laundry processes adverse current rinse cycle under existing processing condition, but can't whole issue be solved, still have effluent part to have to be utilized.
The existing processing scheme of laundrywastes is collected at all Waste Water Centralized, and then unification is directly degraded to the organism in waste water, directly discharges after reaching discharging standards.Laundrywastes main component is organic pollutant, and waste water end treatment method has biochemical processing, materializing strategy technology and photocatalysis oxidation technique etc.Due to all Waste Water Centralized are collected, the complicated component of waste water, during process, cost is compared with high and difficulty is large; In practical application, often have the situation that pollutant discharge amount exceeds standard, for laundrywastes normally anion surfactant (LAS) exceed standard.
Cotton cloth type cloth washing process flow process that is careless, uniform is generally prewashing (removing floating ash), master washes (removal dirt), rinsing (removing washing composition and residual dirt) three phases.For the intermittent type industry washer of independent operating, substrate all runs in this three phases technological process in rotating cage, and every one-phase realizes by water inlet washing (feeding in raw material) and draining action.Prewashing, main wash each running once rinsing then need N time (usual N=2 ~ 4) that operate.
The present invention is administered at process and front end Treatment process combines, and carries out laundrywastes recycling utilization.Process administer mainly for rinse water, because of its washing composition and waste concentration lower, can not be treated, direct reuse in the N-1 time rinsing of next batch substrate, be with the direct reuse of countercurrent rinsing implementation Process laundrywastes reach process improvement object.It is that the main waste water produced with prewashing of washing is merged to collect and administered that front end is administered, for be the improvement of the waste water that in laundrywastes, washing composition and waste concentration higher part are divided.These two joint portions administered show that the last whereabouts of the terminal waste water that the process stage of administering produces and countercurrent rinsing water is as main scouring water; Front end administer be then by main washing that the waste water chemical separating means produced with prewashing are collected separately, flocculated, centrifugation, filtration etc., organism is therefrom separated with impurity, makes the water after improvement be directly used in pre-scouring water, main scouring water and supplementary rinsing water.Dirt in laundrywastes and detergent concentration distinct portions are taked respectively to process is administered, front end is administered and both combination, define a complete laundrywastes recycling utilization system.Wherein process improvement part can be economized on water 50% ~ 70% (relevant with the number of times of rinsing N), and part is administered in front end can reuse 80%, and the saving fresh water amount of taking adding up to this system total is more than 80%.
In laundrywastes, chemical substance attribute is basically identical, improvement with strong points, and heavy dirty and light dirty two-part water is used front end Treatment process and countercurrent rinsing technology governance respectively, and rationally to be fetched water trend by water planning and design, regulation effect is obvious, and reuse water only need meet Production requirement, does not affect product quality, water quality can lower than qualified discharge water and reuse water water quality, therefore technological process is simple, and difficulty of governance reduces, and less input, cost is lower, is the effective ways of water quality based water utilization.
Summary of the invention
The object of the invention is for laundrywastes recycling utilization provides a kind of method, mainly can be used for the recycling utilization of the laundrywastes of the intermittent type industry washer discharge of washing independent operating in dye industry laundry operation.What the present invention adopted is the mode that laundrywastes direct reuse combines with recycling utilization, administers laundrywastes, comprises process and administers and front end improvement.Process is administered the rinse water in laundry process flow process, carries out the direct reuse of waste water by countercurrent rinsing form.It is semi-batch continuous flow that intermittent type industry washer for independent operating designs rinse water, substrate is step operational system, what realize the countercurrent rinsing of rinse water uses Water flow-path, reduce the wastewater flow rate of rinse stage, the fresh water amount of taking of 50% ~ 70% can be saved under existing laundry process condition.It is that in laundry being produced, prewashing and the main waste water washing generation collect improvement separately that front end is administered, through method process such as flocculation, centrifugation, filtrations, the water after improvement uses prewashing, main being washed till in rinsing, and reclamation rate reaches 80%, set up recycling utilization system, save the usage quantity of fresh water.
As shown in laundrywastes recycling utilization process flow sheet, the flow process of the laundrywastes recycling utilization system that process is administered, front end is administered and combined foundation is: fresh water enters the extreme trace rinsing of first substrate, and the waste water that discharge and dehydration produce enters 1
#waste water tank, N-1 rinsing of second batch substrate takes 1
#the water of waste water tank, the like to slubbing rinsing, discharge and dehydration produce waste water enter m
#waste water tank, the master as later batch substrate washes moisturizing, completes the waste water direct reuse course of countercurrent rinsing.Front end is administered then master to be washed and is collected in water tank with prewashing draining, enters recovery tank storage, as prewashing and main scouring water, if rinse water are not enough, also can supply water through flocculation, centrifugation, filtration, ultraviolet pipe sterilization.So complete laundrywastes recycling utilization system is under continuous seepage condition, and the comprehensive fresh water amount of taking of saving reaches more than 80%.
(1) poaching wastewater direct reuse: take countercurrent rinsing as principle, the continuous flow of a design rinse water semi-batch, the system of substrate batch production, makes rinse water not treated, and direct reuse is to the N-1 time washing of next batch substrate.
(2) mainly to wash, prewashing waste water collects separately: the independent collection in actual production refers to the higher concentration of being discharged in prewashing in the laundry operations such as cloth grass, uniform, main stage of the washing collection containing the laundrywastes of dirt.These two stage water sources used mainly normally run the reuse water of generation based on laundrywastes recycling utilization system.Research object of the present invention: 1. master washes the actual waste water in stage 2. by the main waste water washing the washing composition kind consumption preparation in stage.
(3) flocculate: adopt organic floculant, determine the rational flocculating conditions of laundrywastes.
(4) be separated: by screening and the combination of filtering material, separate mode, enable laundrywastes reach the requirement of recycling utilization.
(5) evaluation method of washing effect:
The evaluation method of washing effect of the present invention is formulated with reference to FZ/T10012-1998 " polyester-cotton fabric soil release performance can be evaluated ".
A. the preparation of standard greasy dirt: 1. colored fabric 14
#machine oil 100g adds 0.1g carbon black (300 order), stirs after 10min stored in for subsequent use in wide-necked bottle with homogenizer (6000-7000r/min).2. colourless incandescence thing is by 14
#machine oil changes edible vegetable oil into, the identical preparation standard greasy dirt of all the other conditions.
B. substrate sample prepares: get and substrate identical fibre composition, the fabric (or with 40 textile poplin cloth calicos) of identical yarn, description, 5 pieces, clip 150mm × 150mm sample, preservative film 70mm × 70mm3 block, qualitative filter paper Φ 90mm × 3.
C. fabric sample is stain: fabric sample be placed on (its center superposition) on qualitative filter paper, 0.5mL standard greasy dirt is got with 1mL graduated pipette, all slowly drip in elevation 20mm place, heart position in the sample, with preservative film, greasy dirt is covered and the weight pressure 5min using diameter 50mm1kg heavy, take off weight and preservative film afterwards, allow sample at room temperature place 30min, wash, repeat the method and obtain 3 pieces by contamination sample.
D. stain the washing of sample: by 3 pieces, the sample and 2 pieces, the nonstaining sample that stain, wash by the Xi Ran enterprise washing detergent formulation and washing process condition of implementing laundrywastes reprocessing cycle system respectively.Same washing carries out 2 times, and wherein first time uses the fresh water wash of this enterprise.Second time uses the reuse water washing after the present invention administers.
E. sample evaluation: colored fabric adopts GB250 to evaluate variable color gray scale and evaluates aberration, colourless incandescence thing adopts GB251 grey scale for assessing staining of colour evaluation aberration.Aberration 5 grades is best, and 1 grade the poorest, and 4 grades is premium grads; What standard specimen selected fresh water wash does not stain sample.That washs with reuse water does not stain aberration between sample and standard specimen, and colored fabric and colourless incandescence thing all should be not less than 4 grades.The contamination sample of reuse water washing and do not stain aberration between sample should be suitable with aberration grade between the contamination sample of fresh water wash and standard specimen.After nonstaining sample washing, 1 is standby with 1, after 3 pieces of sample washings of staiing, gets the mean value determination aberration grade of aberration.
The working conditions of foregoing invention is as follows:
Wherein summary of the invention (1) poaching wastewater direct reuse: see countercurrent rinsing flow process, what head criticized N rinsing of substrate gets rid of water water pump suction 1
#waste water tank stores, and N-1 rinsing of two batches of substrates takes 1
#waste water tank stores water, and it gets rid of water water pump suction 2
#waste water tank stores, and reciprocal N-M the rinsing criticizing substrate to M is taken (M-1) successively
#waste water tank stores water, and it gets rid of water water pump suction M
#waste water tank stores, and can supplement master and wash cooling water.
Wherein summary of the invention (2) main is washed, effective constituent contained by prewashing waste water is soap, powerful washing powder, general washing powder, emulsifying agent and oxygen bleaching agent etc., and wherein soap concentration is 0.1-3.0g/L, preferably: 0.2-2.0g/L; Powerful washing powder concentration is: 0.3-5.0g/L, preferably: 0.5-3.0g/L; General washing powder concentration is: 0.3-5.0g/L, preferably: 0.5-3.0g/L; Emulsifier concentration is 0.1-2.5g/L, preferably: 0.5-2.0g/L; Oxygen bleaching agent concentration is 0.5-5.0g/L, preferably: 1.0-3.0g/L.
Wherein first under 60 DEG C of-90 DEG C of conditions, be oxidized 10-20 minute through oxygen bleaching agent before the flocculation of summary of the invention (3) laundrywastes, pH is regulated again with polymaleic acid, overall solution volume is 1000ml, 1. flocculating conditions selected by soap is: flocculation agent 1-2mg/ml, pH value: 5-7, preferred: flocculation agent: 1.2-1.7mg/ml, pH value: 5-6; 2. powerful washing powder flocculating conditions is: flocculation agent: 1-2mg/ml, pH value: 8-10, preferably: flocculation agent: 1.2-1.7mg/ml, pH value: 8-9; 3. emulsifying agent flocculating conditions is: flocculation agent: 1-2mg/ml, pH value: 5-7, preferably: flocculation agent: 1.0-1.5mg/ml, pH value: 5-6; 4. general washing powder flocculating conditions is: flocculation agent: 0.5-3mg/ml, coagulant aids: 0.1-0.5mg/ml, pH value: 5-7, preferably: flocculation agent: 0.5-2.5mg/m1, coagulant aids: 0.1-0.3mg/ml, pH value: 5-6; 5. selected by powerful washing powder+soap+emulsifying agent, flocculating conditions is: flocculation agent 1-3.5mg/ml, coagulant aids: 0.1-0.5mg/ml, pH value: 5-7, preferably: flocculation agent: 1.5-3.0mg/ml, coagulant aids: 0.1-0.3mg/ml, pH value: 5-6.
Wherein the varying in size of throw out that produce due to flocculation of summary of the invention (4), the filtering material adopting aperture to differ carries out combination and can improve separation efficiency, improves separating effect, reduces over the cleaning frequency of filter.The parting material that the present invention selects is PP cotton filter core, 0.1 ~ 0.2 micrometer ceramics filter core and 0.05 micron of folded membrane filter core; The separate mode adopted first is separated through whizzer for the liquid that will flocculate, clear liquid after separation uses surge pump to be sent in following three-level filter device: the wherein cotton filter core of first step PP, the second stage ceramic element of 0.1 ~ 0.2 micron pore size, the third stage tetrafluoroethylene folded membrane filter core of 0.05 micron pore size, carries out dynamic filtration.
Wherein summary of the invention (5) adopts different washing composition under fresh water and reprocessing cycle water two kinds of situations, wash the cloth speckling with greasy dirt, colored fabric adopts GB250 to evaluate variable color gray scale and evaluates aberration, colourless incandescence thing adopts GB251 grey scale for assessing staining of colour evaluation aberration, and aberration grade is all more than 4 grades.
The invention has the beneficial effects as follows:
(1) adopt that master washes by front end Treatment process route, prewashing operation waste water collects improvement separately, because in laundrywastes, chemical substance attribute is basically identical, administer with strong points, successful.Reuse water after the inventive method process only need meet laundry requirement, and do not affect laundry quality, water quality can lower than qualified discharge water and reuse water water quality, therefore technological process is simple, and difficulty of governance reduces, and less input, cost is lower, is the effective ways of water quality based water utilization.
(2) adopt process Treatment process that the generation of waste water in laundry processes can be made to reduce, if countercurrent rinsing is concerning whole laundry processes, under existing processing condition adverse current rinse cycle can save 50% ~ 70% use water.The laundrywastes after the Treatment process process of front end is adopted mainly to wash stage reuse prewashing, master, can reuse 80%.The laundrywastes recycling utilization system synthesis that process is administered and Treatment process combination in front end is set up saves the fresh water amount of taking more than 80%.
(3) adopt in the reuse water of organic floculant flocculation separation, the metal ion such as iron, aluminium produced after not using inorganic flocculating agent to flocculate, when the main stage of washing uses oxygen bleaching agent, cotton kind fabric (containing cellulose fiber fabric) can be avoided to produce oxygen bleaching broken hole and damage.
(4) adopt the reuse water of different washing composition after fresh water and the inventive method process two kinds washing under regimen condition to speckle with the cloth of greasy dirt, aberration grade is all more than 4 grades.Show that the reuse water after adopting the inventive method process washs fabric, the identical washing effect with fresh water can be reached.
Accompanying drawing explanation
Accompanying drawing is laundrywastes recycling utilization process flow sheet of the present invention.
Embodiment
Below in conjunction with embodiment, further illustrate the present invention.
Set forth the present invention further by embodiment below, but therefore do not limit the present invention within the scope of specific embodiment.
Embodiment 1: main preparation waste water flocculating of washing is separated
General washing powder 2.0g is taken by the method for summary of the invention (2), add water 870ml, be heated to 70 DEG C, add color bleaching powder 1.0g, dissolve insulation 15 minutes, polymaleic acid 1.0ml is added after cooling, add the cationic organic polymer coargulator E130ml of 5g/L after stirring, cumulative volume is about 1L, leaves standstill 15 minutes after stirring, be filter material static filtering with qualitative filter paper, reclaim filtrate and be about 850ml, filtrates tested pH value is 6, and transmittance is 98.0%, turbidity is 4.83NTU, and surface tension is 35.6mN/m.
Embodiment 2: sports socks master washes waste water flocculating and is separated
The heavy 100g of sports socks 7 is got by the method for summary of the invention (2), take general washing powder 2.0g, add water 870ml, put under sports socks stir and be heated to 70 DEG C, add 1.0g oxygen bleaching powder dissolve and stir insulation 15 minutes, take out sports socks, remaining raffinate is about 770ml, the cationic organic polymer coargulator E125ml adding 20.0g/L after polymaleic acid 1.0ml stirs is added after cooling, stir the coagulant aids 150ml leaving standstill and add 1.0g/L after 15 minutes, cumulative volume is about 1L, 10 minutes are left standstill after stirring, throw out separation is carried out by the method for summary of the invention (4), reclaim filtrate and be about 900ml, surveying filtrate pH value is 6-7, transmittance is 96.7%, turbidity is 5.93NTU, surface tension is 61.4mN/m.
Embodiment 3: main washing prepares waste water individual event detergent ingredients flocculation separation
Take soap 1.25g by the method for summary of the invention (2), be dissolved at 50 DEG C in 700ml water, be heated to 70 DEG C, add color bleaching powder 1.0g, dissolve insulation 15 minutes, after cooling, add 1ml polymaleic acid, stir the cationic organic polymer coargulator E300ml adding 5g/L after 10 minutes, add up to about 1L, leave standstill 15 minutes after stirring, filter with qualitative filter paper, surveying filtrate pH value is 6, transmittance is 99.0%, and turbidity is 4.05NTU, and surface tension is 65.9mN/m; Take powerful washing powder 2.0g, be dissolved in 720ml water, be heated to 70 DEG C, add color bleaching powder 1.0g, dissolve insulation 15 minutes, after cooling, add the polymaleic acid of 0.5ml, stir the cationic organic polymer coargulator E280ml adding 5g/L after 5 minutes, add up to about 1L, leave standstill 15min after stirring, then filter with qualitative filter paper, surveying filtrate pH value is 8-9, transmittance is 100.0%, and turbidity is 0.95NTU, and surface tension is 53.4mN/m; Take emulsifying agent 1.5g, be dissolved in 780ml water, be heated to 70 DEG C, add color bleaching powder 1.0g, dissolve insulation 15 minutes, after cooling, add 2.0ml polymaleic acid, stir the cationic organic polymer coargulator E220ml adding 5g/L after 10 minutes, cumulative volume is about 1L, leaves standstill 15 minutes, filter with qualitative filter paper after stirring, surveying filtrate pH value is 5-6, transmittance is 97.2%, and turbidity is 5.38NTU, and surface tension is 55.2mN/m.
Embodiment 4: the main waste water flocculating of washing of detergent formulation preparation is separated
By the method for summary of the invention (2), take soap 1.25g, powerful washing powder 2.0g, emulsifying agent 1.5g, be dissolved in 700ml water at 50 DEG C, 70 DEG C are warming up under stirring, add oxygen bleaching agent 1.3g, insulation 15 minutes after dissolving, 2.5ml polymaleic acid is added again after cooling, stir the cationic organic polymer coargulator E300ml adding 5g/L after 10 minutes, cumulative volume is about 1L, 15 minutes are left standstill after stirring, filter with qualitative filter paper, reclaim filtrate and be about 870ml, surveying filtrate pH value is 5, transmittance is 99.2%, turbidity is 3.98NTU, surface tension is 67.5mN/m.
Embodiment 5. sports socks detergent formulation master washes waste water flocculating and is separated
By the method for summary of the invention (2), get sports socks 7, heavy 150g, take powerful washing powder 1.5g, soap 1.0g, emulsifying agent 1.0g, be dissolved in 1L water at 50 DEG C, add sports socks, 70 DEG C are warming up under stirring, add the 10g/L oxygen bleaching agent 134ml dissolved, stir insulation 15 minutes, take out sports socks, remaining raffinate is about 950ml, polymaleic acid 2.5ml is added after cooling, stir the cationic organic polymer coargulator E200ml adding 20g/L after 10 minutes, the coagulant aids 325ml of 1g/L, cumulative volume is about 1.5L, 15 minutes are left standstill after stirring, throw out separation is carried out by the method for summary of the invention (4), reclaim filtrate 1.3L, surveying filtrate pH value is 5-6, transmittance is 98.1%, turbidity is 5.82NTU, surface tension is 56.0mN/m.
The evaluation of embodiment 6. washing effect
By summary of the invention (5) A, adopt edible vegetable oil preparation standard greasy dirt; Press summary of the invention (5) B with 40 textile poplin cloth calicos and prepare substrate sample; By summary of the invention (5) C, sample is stain; Wash by summary of the invention (5) D item.Wherein detergent formulation and the same embodiment of the present invention of washing process condition (4).Laboratory deionized water is taken in first time washing, the water that the discharge water that first time washing is taken in second time washing is administered through method for recycling of the present invention, washes and first pass rinsing water as prewashing is main.Take laboratory deionized water as second and third time rinsing water, after washing, fabric is dried.With GB251 grey scale for assessing staining of colour evaluation aberration, between the non-contamination sample cloth of the water washing of administering with non-contamination sample cloth and the present invention of laboratory deionized water wash, aberration is 5 grades.With the non-contamination sample cloth of laboratory deionized water wash and to stain aberration between sample cloth be 4-5 level.Between the non-contamination sample cloth of the water washing of administering with the present invention and contamination sample cloth, aberration is 4-5 level.With laboratory deionized water wash do not stain sample cloth and administer water washing with the present invention contamination sample cloth between aberration be 4 grades.Without washing sample cloth and be 2-3 level without the aberration washed between nonstaining sample cloth.Illustrate that detergent formulation and the washing of washing process to the standard greasy dirt manually prepared are effective.The difference of different bath wateies to washing effect is not obvious.The washing effect that the present invention administers water is suitable with laboratory deionized water wash effect, meets laundry industry requirement.
Embodiment 7: sheet quilt cover class cloth grass washing
Substrate: cloth grass 80Kg
One, prewashing: fetch water 350L from recovery tank, washs 3 minutes after water level.
Two, draining 200L is to foul water tank.
Three, mainly to wash: the 100L that fetches water from recovery tank, add steam.
When steam is added to 70 DEG C, add color bleaching powder 700g, wash 15 minutes;
Four, progressively cool-down method:
1. do not want draining, first from 3
#waste water tank water intaking 200L;
2. rotate after 2 minutes, draining 250L is to foul water tank;
3. again from 3
#waste water tank water intaking 200L, recovery tank water intaking 50L, turn 2 minutes, draining 300L is to foul water tank.
Five, first time rinsing: from 2
#waste water tank water intaking 300L, turns 3 minutes, draining the 400L to 3 that dewaters
#waste water tank.
Six, second time rinsing: from 1
#waste water tank water intaking 350L turns 3 minutes, draining 250L to 2
#waste water tank.
Seven, third time rinsing: add fresh water 200L, heat 35 DEG C-45 DEG C, add neutralizing acid agent: 300 grams, turns 3 minutes, draining high speed dewatering, adds up to draining 300L to enter 1
#waste water tank.
Eight, cloth grass goes out machine
Get, draining account:
Foul water tank receives prewashing sewer 200L, and master washes twice sewer 250L+300L, adds up to 750L;
Recovery tank: receive reprocessing cycle process water 600L (750 × 80%);
1
#waste water tank receives third time rinsing draining and high speed dewatering produces hydration meter 300L.Second time rinsing need from 1
#waste water tank water intaking 350L, breach 50L is from recovery tank supply;
2
#waste water tank receives second time rinsing draining 250L.First time rinsing need from 2
#waste water tank water intaking 300L, breach 50L is from recovery tank supply;
3
#waste water tank receives first time rinsing row, dehydration 400L.Master washes twice cooling water 450L from 3
#waste water tank water intaking 400L, recovery tank moisturizing 50L;
Main to wash from recovery tank water intaking 100L, add three moisturizing 3 × 50L=150L, then add prewashing and to fetch water 350L from recovery tank, add up to the 600L that to fetch water from recovery tank, receive reprocessing cycle process water 600L with recovery tank and balance.
This time laundrywastes recycling utilization system components water cycle running is in equilibrium state substantially.Wherein take fresh water 200L, band water more than 60% after the careless 80Kg of cloth dewaters is 50L, and remaining 150L is the consumption such as flocculation, centrifugation, filtration and part race leakage evaporation.
If each stage all takes fresh water, not reuse is directly discharged, then prewashing 350L, master washes 550L, and three times rinsing (300+350+200) adds up to 850L, and fresh water 1750L taken altogether by this 80Kg cloth grass, save the fresh water amount of taking 1550L by contrast, water saving 88.6%.
Press above-mentioned washing process fresh water wash with the cloth grass of same batch and wash by current embodiment of the present invention, the aberration between this different cloth grass presses the evaluation of GB251 grey scale for assessing staining of colour, and aberration grade is 4-5, shows that washing effect meets the demands.
Claims (9)
1. a cloth grass laundrywastes cyclic utilization method, is characterized in that described method comprises:
1) fresh water enters the extreme trace rinsing of first substrate, and the waste water that discharge and dehydration produce enters 1
#waste water tank, N-1 rinsing of second batch substrate takes 1
#the water of waste water tank;
2) waste water that N-1 rinsing is discharged and dehydration produces of second batch substrate enters 2
#waste water tank, N-2 rinsing of the 3rd batch of substrate takes 2
#the water of waste water tank;
3) waste water that N-2 rinsing is discharged and dehydration produces of the 3rd batch of substrate enters 3
#waste water tank, N-3 rinsing of the 4th batch of substrate takes 3
#the water of waste water tank; The like to slubbing rinsing, make rinse water not treated, direct reuse to the N-1 time of next batch substrate washing, N=2 ~ 4;
4) waste water that slubbing rinsing is discharged and dehydration produces washes moisturizing as the master of later batch substrate;
5) prewashing and the main waste water washing generation collect improvement separately, enter recovery tank as the prewashing of next batch washing clothes and main scouring water after flocculation, centrifugation, filtration, the process of ultraviolet-sterilization method.
2. cloth grass laundrywastes cyclic utilization method as claimed in claim 1, is characterized in that:
Flocculation agent is: cationic organic polymer coargulator, molecular weight: 500-200 ten thousand, and coagulant aids is: sodium polyacrylate, and pH adjusting agent is polymaleic acid.
3. cloth grass laundrywastes cyclic utilization method as claimed in claim 1, is characterized in that:
When the water in waste water tank is not enough, the water in recovery tank is as the moisturizing of waste water tank.
4. cloth grass laundrywastes cyclic utilization method as claimed in claim 1, is characterized in that:
Front end administer in master washes, effective constituent contained by prewashing waste water is soap, powerful washing powder, general washing powder, emulsifying agent and oxygen bleaching agent, wherein soap concentration is 0.1-3.0g/L; Powerful washing powder concentration is: 0.3-5.0g/L; General washing powder concentration is: 0.3-5.0g/L; Emulsifier concentration is 0.1-2.5g/L; Oxygen bleaching agent concentration is 0.5-5.0g/L.
5. cloth grass laundrywastes cyclic utilization method as claimed in claim 2, is characterized in that:
First under 60 DEG C of-90 DEG C of conditions, be oxidized 10-20 minute through oxygen bleaching agent before laundrywastes flocculation, then regulate pH with polymaleic acid, overall solution volume is 1000ml, and 1. flocculating conditions selected by soap is: flocculation agent 1-2mg/ml, pH value: 5-7; 2. powerful washing powder flocculating conditions is: flocculation agent: 1-2mg/ml, pH value: 8-10; 3. emulsifying agent flocculating conditions is: flocculation agent: 1-2mg/ml, pH value: 5-7; 4. general washing powder flocculating conditions is: flocculation agent: 0.5-3mg/ml, coagulant aids: 0.1-0.5mg/ml, pH value: 5-7; 5. selected by powerful washing powder+soap+emulsifying agent, flocculating conditions is: flocculation agent 1-3.5mg/ml, coagulant aids: 0.1-0.5mg/ml, pH value: 5-7.
6. cloth grass laundrywastes cyclic utilization method as claimed in claim 5, is characterized in that:
Filtering material is PP cotton filter core, 0.1 ~ 0.2 micrometer ceramics filter core and 0.05 micron of folded membrane filter core; Separate mode is that flocculation liquid is first separated through whizzer, clear liquid after separation uses surge pump to be sent in following filtration unit: the wherein cotton filter core of first step PP, the ceramic element of the second stage 0.1 ~ 0.2 micron pore size, the tetrafluoroethylene folded membrane filter core of the third stage 0.05 micron pore size.
7. the cloth grass laundrywastes cyclic utilization method as described in one of claim 1 ~ 6, is characterized in that:
Described method saves the fresh water amount of taking more than 80%.
8. cloth grass laundrywastes cyclic utilization method as claimed in claim 7, is characterized in that:
Substrate: cloth grass 80Kg
One) prewashing: fetch water 350L from recovery tank, washs 3 minutes after water level;
Two) draining 200L is to foul water tank;
Three) mainly to wash: the 100L that fetches water from recovery tank, add steam;
When steam is added to 70 DEG C, add color bleaching powder 700g, wash 15 minutes;
Four) progressively cool-down method:
1) not draining, first from 3# waste water tank water intaking 200L;
2) rotate after 2 minutes, draining 250L is to foul water tank;
3) again from 3# waste water tank water intaking 200L, recovery tank water intaking 50L, turn 2 minutes, draining 300L is to foul water tank;
Five) first time rinsing: from 2# waste water tank water intaking 300L, turn 3 minutes, draining 400L to the 3# waste water tank that dewaters.
Six) second time rinsing: from 1# waste water tank water intaking 350L, turn 3 minutes, draining 250L to 2# waste water tank;
Seven) third time rinsing: add fresh water 200L, heat 35 DEG C-45 DEG C, add neutralizing acid agent: 300 grams, turns 3 minutes, draining high speed dewatering, adds up to draining 300L to enter 1# waste water tank;
Eight) cloth grass goes out machine.
9. cloth grass laundrywastes cyclic utilization method as claimed in claim 8, is characterized in that:
Described method saves the fresh water amount of taking 88.6%; Described method washing cloth grass aberration grade is 4-5, evaluates by GB251 grey scale for assessing staining of colour.
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| CN104947384B (en) * | 2014-03-27 | 2018-12-25 | 青岛海尔洗衣机有限公司 | A kind of washing machine flocculation plant and washing machine with self-cleaning function |
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| CN105088671B (en) * | 2014-05-08 | 2019-08-27 | 青岛海尔洗衣机有限公司 | A kind of washing machine filtering cleaning device, cleaning method and washing machine |
| CN114772805A (en) * | 2022-03-29 | 2022-07-22 | 江苏海狮机械股份有限公司 | Micro-nano bubble washing discharge water treatment device and treatment method thereof |
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