CN102515395A - Method and device for using small-aperture spiral wound ultrafiltration membranes to treat papermaking wastewater - Google Patents
Method and device for using small-aperture spiral wound ultrafiltration membranes to treat papermaking wastewater Download PDFInfo
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- CN102515395A CN102515395A CN2011104514142A CN201110451414A CN102515395A CN 102515395 A CN102515395 A CN 102515395A CN 2011104514142 A CN2011104514142 A CN 2011104514142A CN 201110451414 A CN201110451414 A CN 201110451414A CN 102515395 A CN102515395 A CN 102515395A
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Abstract
The invention discloses a method and a device for using small-aperture spiral wound ultrafiltration membranes to treat papermaking wastewater. The main process includes coagulation efficient air floatation and small-aperture ultrafiltration system which comprises a water collection tank (1), an efficient air floating system (2), a small-aperture ultrafiltration system (3), a water recycling tank (4) and a concentrated water tank (5). The efficient air floating system comprises a coagulation portion and an air floatation portion. The method and the device for using small-aperture spiral wound ultrafiltration membranes to treat papermaking wastewater has the advantages that most CODCr (chemical oxygen demand), suspended matters and fibers can be removed by means of the coagulation efficient air floatation, the small-aperture spiral wound ultrafiltration membrane system using a linear water inlet runner net can effectively control membrane contamination, and the membrane molecular weight cutoff is 3000-10000Da. Quality of discharged water of the whole system is high and stable, turbidity of the discharged water is smaller than or equal to 3NTU (number of transfer units), the suspended matters can be removed completely, the discharged water is odorless in long-time standing, concentrated solution can be used as slurry to be reused after further treatment, and permeate liquid can be directly used as production circulating water for reuse. The method and the device for using small-aperture spiral wound ultrafiltration membranes to treat papermaking wastewater are used for treatment and recycling of papermaking wastewater, and worthy of wide popularization and application to the market.
Description
Technical field
The invention belongs to the water treating equipment technical field, relate to the manufacture paper with pulp method and apparatus of waste water of a kind of small-bore rolling ultrafiltration membrane treatment.
Background technology
The waste water of manufacturing paper with pulp is mainly derived from the process of manufacturing paper with pulp and tobacco sheets by paper making method production process of pulping and paper-making.
Pulping and paper-making machine hand section waste water is called plain boiled water, and it derives from the paper machine room paper making process.Plain boiled water mainly contains fiber fines, filler, coating and lysed timber composition, and the sizing material that adds, Wet Strength Resin, sanitas etc., is main with insoluble COD, and biodegradability is lower, and the sanitas of its adding has certain toxicity.The plain boiled water water yield is bigger, but its contained organic pollution load is well below black digestion liquid and middle-stage wastewater.Dialogue water treatment and reuse are significant to conserve water resource, minimizing pollutant emission.
China is a tobacco planting big country, and it is one of important technology of tobacco waste regeneration comprehensive utilization that paper process is made tobacco sheet.Utilization should the resulting tobacco sheets by paper making method of technology has that density is little, releasing content of coke tar low and characteristics such as chemical ingredients is controlled, is effective technology of present production " health type " cigarette.But paper process is made the tobacco sheet technology and is needed to use technologies such as slurrying, the papermaking working method of manufacturing paper with pulp and natural product extraction separation; Produce a large amount of waste water in the production process; One ton of tobacco sheet of every production will produce the organic waste water of 50-120 ton; Throughput is 10,000 tons/year production line, and day wastewater treatment capacity is up to 2000-2600m
3/ d.Directly discharging can cause environmental pollution.
The general character of the existing paper waste of waste water that produces in the tobacco sheets by paper making method production process is as containing fiber fines; Have again simultaneously in tobacco wastewater colourity height, the waste water and contain characteristics such as the disadvantageous nicotine of microorganism growth; Paper process tobacco wastewater water quality is very big with tobacco leaf kind difference and production process fluctuation simultaneously, COD
CrFrom 1500-250000mg/L; Belong to high concentrated organic wastewater, colourity is dark (being reddish-brown), and SS is higher; Redox potential is higher; It is rotten etc. that waste water is prone to corruption, considers that therefore the tobacco sheet wastewater from paper machine directly handles the reuse problem and be significant, for the water resources of practicing thrift worsening shortages and alleviate environmental pollution and be significant equally.
Air supporting is a kind of water technology of uniqueness; Can produce microbubble through certain mode; Thereby adhere to density in the water and approaching solid or the liquid impurity particulate of water, form the air float body of density, effectively remove materials such as suspended substance in the waste water, fiber, algae less than water.It is even that efficient air-floating forms bubble, can suck and dissolve enough oxygen, is issued to higher daf efficiency in the less situation of reflux ratio.
Membrane technique has advantages such as high-level efficiency, less energy-consumption, normal-temperature operation and easy amplification.Ultrafiltrationmembrane process is that a kind of pressure difference with the film both sides is a motivating force, is filtration medium with the ultra-filtration membrane, with the relevant screening process of membrane pore size size.Ultrafiltration is a kind of physical separating process, and any phase transformation does not take place.Utilize the characteristic that ultra-filtration membrane can separate substance; Select the ultra-filtration membrane of suitable molecular weight cut-off for use; Can hold back materials such as suspended particulate, Mierocrystalline cellulose and lignin class in the waste water of manufacturing paper with pulp, colloidal particle, bacterium, become liquid concentrator, further handle the back reuse as slurry; See through liquid directly as the reuse of production cycle water.The rolling ultra-filtration membrane is few because of its current dead angle, anti-pollution, characteristics that crushing resistance is good have been widely used in feed separation and water treatment various fields such as food-processing, drink industry, medicine industry, biotechnological formulation, Chinese medicine preparation, clinical medicine, dyeing waste water, food industrial wastewater processing, resource recovery, environmental engineering.
Summary of the invention
The object of the present invention is to provide the manufacture paper with pulp method of waste water of small-bore rolling ultrafiltration membrane treatment.This invention is applied to the processing of wastewater from paper machine with small-bore rolling ultra-filtration membrane, the closed cycle and the zero release of the waste water of can realizing manufacturing paper with pulp.Adopt coagulation efficient air-floating-small-bore ultrafiltration main process.Coagulation efficient air-floating system adopts the intelligent dosing system; Air supporting water inlet (or water outlet) water quality is carried out online detection; Adopt FUZZY ALGORITHMS FOR CONTROL to substitute pid algorithm; The adjustment added amount of chemical can be removed suspended particulate, Mierocrystalline cellulose, lignin class and the colloidalmaterial etc. of the waste water of manufacturing paper with pulp to guarantee the water outlet effect in real time, reduces part COD in the waste water
Cr, turbidity and colourity etc.; The small-bore ultrafiltration system adopts homemade small-bore rolling ultra-filtration membrane, the membrane filtration process that circulates continuously, molecular weight cut-off 3000～10000Da; Adopt linear pattern inlet conduit net, overcome the intermembranous distance of traditional coiled ultrafiltration module, runner is narrower, does not allow suspended substance to get into membrane module, to the demanding shortcoming of feed liquid pre-treatment.Can effectively reduce the resistance of water flow passage, further reduce sedimentation rate and the dead band of pollutent at face to feed liquid; Secondly, the linear pattern inlet conduit can effectively reduce the flow velocity loss of face tangential because of flow route shortens, help washing away the film surface deposits, reduces concentration polarization, and effectively controlling diaphragm pollutes, and can further remove the COD in the waste water
Cr, suspended substance, colourity etc.
The object of the present invention is to provide the manufacture paper with pulp device of waste water of small-bore rolling ultrafiltration membrane treatment.This device comprises water collecting basin 1, efficient air-floating 2, small-bore ultrafiltration system 3, reuse pool 4, dense pond 5 successively; Said efficient air-floating system comprises coagulation and air supporting two portions, adopts efficient air dissolved pump 6, comprises reliever 7, Gas dissolving pipe 8 and valve 9; Said small-bore ultrafiltration system adopts homemade small-bore rolling ultra-filtration membrane, and diaphragm comprises the film supporting layer in the membrane module, linear pattern inlet conduit net, and ultra-filtration membrane group molecular weight cut-off is at 3000～10000Da.
The invention provides the manufacture paper with pulp method of waste water of a kind of small-bore rolling ultrafiltration membrane treatment that adopts said apparatus, this process method comprises the steps:
(1) waste water of manufacturing paper with pulp at first gets into water collecting basin, in water collecting basin, mixes, and gets into coagulation efficient air-floating system then;
(2) in coagulation efficient air-floating system, the flocculation agent according to the intelligent dosing system adds respective concentration starts the air supporting program, by the dosage of setting, reflux ratio, time completion coagulation-air supporting, removal most COD
Cr, suspended substance, fiber substance, alleviated follow-up small-bore ultrafiltration system film and polluted pressure;
(3) water outlet of coagulation efficient air-floating gets into the small-bore ultrafiltration system, holds back a large amount of small organic molecules, suspended substance, colloidalmaterial, removes the COD in the waste water
Cr, turbidity, colourity, peculiar smell;
(4) small-bore ultrafiltration system water outlet, water reuse tank during clear water partly gets into, dense water gets into dense pond, and liquid concentrator is further handled the back reuse as slurry, sees through liquid directly as the reuse of production cycle water;
The present invention compared with prior art has the following advantages and the high-lighting effect: the effluent quality good, stable, and delivery turbidity≤3NTU, suspended substance is removed fully, places free from extraneous odour for a long time; Small-bore rolling ultrafiltration membrane system adopts linear pattern inlet conduit net, and effectively controlling diaphragm pollutes, and retaining molecular weight is 3000～10000Da.The wastewater from paper machine Treatment for Reuse of the present invention's design is a kind of tobacco wastewater, paper waste advanced treatment or recycling method and device that is worth wide popularization and application on market.
Description of drawings
Fig. 1 is the manufacture paper with pulp process flow diagram of method and apparatus of waste water of small-bore provided by the invention rolling ultrafiltration membrane treatment.
Among the figure: water reuse tank, the dense pond of 5-, 6-air dissolved pump, 7-reliever, 8-Gas dissolving pipe among 1-water collecting basin, 2-coagulation efficient air-floating system, 3-small-bore ultrafiltration system, the 4-, 9-valve.
Embodiment
Specify embodiment of the present invention below in conjunction with technical scheme and accompanying drawing.
Method process flow diagram by small-bore ultrafiltration membrane treatment wastewater from paper machine can find out that this device comprises water collecting basin 1, efficient air-floating 2, small-bore ultrafiltration system 3, reuse pool 4, dense pond 5 successively; Said efficient air-floating system comprises coagulation and air supporting two portions, adopts efficient air dissolved pump 6, comprises reliever 7, Gas dissolving pipe 8 and valve 9; Said small-bore ultrafiltration system adopts homemade small-bore rolling ultra-filtration membrane, and diaphragm comprises the film supporting layer in the membrane module, linear pattern inlet conduit net, and ultra-filtration membrane group molecular weight cut-off is at 3000～10000Da.
The invention provides the manufacture paper with pulp method of waste water of a kind of small-bore rolling ultrafiltration membrane treatment that adopts said apparatus, this process method comprises the steps:
(1) waste water of manufacturing paper with pulp at first gets into water collecting basin, in water collecting basin, mixes, and gets into coagulation efficient air-floating system then;
(2) in coagulation efficient air-floating system, the flocculation agent according to the intelligent dosing system adds respective concentration starts the air supporting program, by the dosage of setting, reflux ratio, time completion coagulation-air supporting, removal most COD
Cr, suspended substance, fiber substance, alleviated follow-up small-bore ultrafiltration system film and polluted pressure;
(3) water outlet of coagulation efficient air-floating gets into the small-bore ultrafiltration system, holds back a large amount of Mierocrystalline celluloses, xylogen, suspended substance and colloidalmaterial, removes the COD in the waste water
Cr, turbidity, colourity;
(4) small-bore ultrafiltration system water outlet, clear water partly gets into reuse pool, and dense water gets into dense pond, and liquid concentrator is further handled the back reuse as slurry, sees through liquid directly as the reuse of production cycle water.
Below enumerate several instances effect of the present invention is described, but claim scope of the present invention is not limited only to this.
Instance 1: sewage source is certain tobacco factory effluent, and condition of water quality is: COD
CrContent 2000-4500mgL
-1, SS is 1200mgL
-1, turbidity is 248NTU, colourity is 300 (extension rates).Handle through coagulation efficient air-floating-small-bore ultrafiltration main process, the molecular weight cut-off of small-bore rolling ultra-filtration membrane is 3000Da, final outflow water turbidity≤3 NTU; Colourity≤30, SS does not detect, and places free from extraneous odour for a long time; Reach industrial reuse water primary standard, see through liquid and be used for the production cycle use;
Instance 2: sewage source is certain tobacco factory effluent, and condition of water quality is: COD
CrContent 3000-5000mgL
-1, SS is 1680mgL
-1, turbidity is 263NTU, colourity is 350 (extension rates).Handle through coagulation efficient air-floating-small-bore ultrafiltration main process, the molecular weight cut-off of small-bore rolling ultra-filtration membrane is 10000Da, final outflow water turbidity≤3 NTU; Colourity≤30, SS does not detect, and places free from extraneous odour for a long time; Reach industrial reuse water primary standard, see through liquid and be used for the production cycle use;
Instance 3: sewage source is certain paper waste water, and condition of water quality is: COD
CrContent 5000-15000mgL
-1, SS is 786mgL
-1, turbidity is 165NTU, colourity is 200 (extension rates).Handle through coagulation efficient air-floating-small-bore ultrafiltration main process, the molecular weight cut-off of small-bore rolling ultra-filtration membrane is 6000Da, final outflow water turbidity≤3 NTU; Colourity≤30, SS does not detect, and places free from extraneous odour for a long time; Reach industrial reuse water primary standard, see through liquid and be used for the production cycle use.
Although illustrated and described embodiments of the invention; Those having ordinary skill in the art will appreciate that: under the situation that does not break away from principle of the present invention and aim, can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is limited claim and equivalent thereof.
Claims (5)
1. the small-bore rolling ultrafiltration membrane treatment device of waste water of manufacturing paper with pulp, this device comprises water collecting basin (1), efficient air-floating (2), small-bore ultrafiltration system (3), reuse pool (4), dense pond (5); Said efficient air-floating system comprises coagulation and air supporting two portions, adopts efficient air dissolved pump (6), comprises reliever (7), Gas dissolving pipe (8) and valve (9); Said small-bore ultrafiltration system adopts homemade small-bore rolling ultra-filtration membrane, and diaphragm comprises the film supporting layer in the membrane module, linear pattern inlet conduit net, and ultra-filtration membrane group molecular weight cut-off is at 3000～10000Da.
2. the manufacture paper with pulp device of waste water of small-bore according to claim 1 rolling ultrafiltration membrane treatment; It is characterized in that; The small-bore ultrafiltration system adopts homemade small-bore rolling ultra-filtration membrane, according to the character that is processed feed liquid, and the optional 3000～10000Da of its molecular weight cut-off.
3. rolling ultrafiltration membrane treatment the manufacture paper with pulp device of waste water in small-bore according to claim 1 is characterized in that the small-bore ultra-filtration membrane adopts linear pattern inlet conduit net.
4. adopt the manufacture paper with pulp method of waste water of small-bore as claimed in claim 1 rolling ultrafiltration membrane treatment, it is characterized in that this process method comprises the steps:
(1) waste water of manufacturing paper with pulp at first gets into water collecting basin, in water collecting basin, mixes, and gets into coagulation efficient air-floating system then;
(2) in coagulation efficient air-floating system, the flocculation agent according to the intelligent dosing system adds respective concentration starts the air supporting program, by the dosage of setting, reflux ratio, time completion coagulation-air supporting;
(3) water outlet of coagulation efficient air-floating gets into the small-bore ultrafiltration system;
(4) small-bore ultrafiltration system water outlet sees through liquid and partly gets into reuse pool, and liquid concentrator gets into dense pond, and liquid concentrator is further handled the back reuse as slurry, sees through liquid directly as the reuse of production cycle water.
5. rolling ultrafiltration membrane treatment the manufacture paper with pulp method of waste water in small-bore according to claim 4 is characterized in that it is coagulation efficient air-floating+small-bore rolling ultrafiltration system that said wastewater from paper machine is handled reuse technology.
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| CN2011104514142A CN102515395A (en) | 2011-12-30 | 2011-12-30 | Method and device for using small-aperture spiral wound ultrafiltration membranes to treat papermaking wastewater |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103359896A (en) * | 2013-08-08 | 2013-10-23 | 波鹰(厦门)科技有限公司 | A treatment, regeneration and cyclic utilization method for tobacco sheet production wastewater |
| CN103539282A (en) * | 2012-07-17 | 2014-01-29 | Lg电子株式会社 | Water treatment apparatus with circulating flow path and water treatment method using the same |
| CN103549641A (en) * | 2013-11-14 | 2014-02-05 | 红塔烟草(集团)有限责任公司 | Purification treatment method for recycling stem washing water in paper-making reconstituted tobacco production process |
| CN103626323A (en) * | 2012-08-20 | 2014-03-12 | 杰瑞能源服务有限公司 | Technology and special-purpose device for deep-treatment on pharmacy and papermaking waste water |
| CN103723856A (en) * | 2013-12-13 | 2014-04-16 | 北京清大膜科膜技术有限公司 | Papermaking sewage closed circulation method and device |
| CN104370343A (en) * | 2014-11-24 | 2015-02-25 | 广西大学 | Method for deeply treating wasted paper pulping and papermaking waste water by adopting membrane separation method |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103539282A (en) * | 2012-07-17 | 2014-01-29 | Lg电子株式会社 | Water treatment apparatus with circulating flow path and water treatment method using the same |
| CN103539282B (en) * | 2012-07-17 | 2015-05-20 | Lg电子株式会社 | Water treatment apparatus with circulating flow path and water treatment method using the same |
| US9517949B2 (en) | 2012-07-17 | 2016-12-13 | Lg Electronics Inc. | Water treatment apparatus with circulating flow path and water treatment method using the same |
| CN103626323A (en) * | 2012-08-20 | 2014-03-12 | 杰瑞能源服务有限公司 | Technology and special-purpose device for deep-treatment on pharmacy and papermaking waste water |
| CN103626323B (en) * | 2012-08-20 | 2015-08-12 | 杰瑞能源服务有限公司 | The processing method of a kind of pharmacy, paper waste advanced treatment and special purpose device |
| CN103359896A (en) * | 2013-08-08 | 2013-10-23 | 波鹰(厦门)科技有限公司 | A treatment, regeneration and cyclic utilization method for tobacco sheet production wastewater |
| CN103359896B (en) * | 2013-08-08 | 2014-07-09 | 波鹰(厦门)科技有限公司 | A treatment, regeneration and cyclic utilization method for tobacco sheet production wastewater |
| CN103549641A (en) * | 2013-11-14 | 2014-02-05 | 红塔烟草(集团)有限责任公司 | Purification treatment method for recycling stem washing water in paper-making reconstituted tobacco production process |
| CN103549641B (en) * | 2013-11-14 | 2016-01-06 | 红塔烟草(集团)有限责任公司 | The purifying treatment method that stalk water circulation uses is washed in a kind of papermaking-method reconstituted tobaccos production process |
| CN103723856A (en) * | 2013-12-13 | 2014-04-16 | 北京清大膜科膜技术有限公司 | Papermaking sewage closed circulation method and device |
| CN104370343A (en) * | 2014-11-24 | 2015-02-25 | 广西大学 | Method for deeply treating wasted paper pulping and papermaking waste water by adopting membrane separation method |
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Application publication date: 20120627 |