CN101028958B - Method for treating industrial waste water - Google Patents
Method for treating industrial waste water Download PDFInfo
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- CN101028958B CN101028958B CN2006100184960A CN200610018496A CN101028958B CN 101028958 B CN101028958 B CN 101028958B CN 2006100184960 A CN2006100184960 A CN 2006100184960A CN 200610018496 A CN200610018496 A CN 200610018496A CN 101028958 B CN101028958 B CN 101028958B
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Abstract
A process for treating industrial sewage includes such steps as pretreating (collecting sewage, regulating pH value, storing in sewage pool or tank, pumping, filtering by quartz sand, activated carbon and KDF sequentially, accurate filtering, and ultrafilter), and reverse osmosis in the RO(NF) reverse osmosis system.
Description
Technical field
The present invention relates to the environmental protection field, be specifically related to a kind of process for treating industrial waste water.
Background technology
The membrane sepn phenomenon is a ubiquity in vivo, but at first being spread through Vesica sus domestica enters the alcohol from water naturally by Nollet, the time Zhui Soo phenomenon of osmosis that human understanding utilization to it, simulation experienced for five more than ten years finds, found the dialysis phenomenon by Graham afterwards, people just begin the membrane sepn phenomenon is paid attention to and with Ji research.The mankind had successfully made first artificial membrane-Jin iron cyaniding copper film in the world in 1864, use this film sucrose solution to test, utilize the interaction of osmotic pressure, temperature, strength of solution and influence each other, Van ' tHoff is a starting point with the Pranbe theory of knowledge, has set up complete dilute solution theory.Donnan studied the equilibrium appearance in the charged body transmission in 1911, for technical foundation has been laid in afterwards electrodialysis (CD) and the invention of membrane electrode, nineteen sixty, it is 1 year very important on the membrane separation technique development history, this year Loeb and Souriajan have invented a kind of new masking technique jointly, utilize cellulose acetate material to make asymmetric membrane, make reverse osmosis process tentatively move towards industrial application from the laboratory, 1, main membrane sepn process industrial development process, why membrane separation technique can be developed rapidly in half a century, mainly contain following reason: membrane separation technique has formed comparatively complete to cross nearly 200 years research accumulation, the basic theory of system.Along with high-polymer membrane material, structure, form, performance and film manufacturing process have been set up in the development of modern science technology, for the expanded application territory provides prerequisite.The production technology that modern industry presses for is energy-conservation, the less energy-consumption starting material utilized and eliminated environmental pollution again.According to the most of membrane sepn process of research is the most energy-conservation separation method, water resources is utilized again, the raw-material recovery and reuse of less energy-consumption, the pollution of environmental engineering and off gas treatment etc., so it is all wide with the closely related mould material The Application of Technology of membrane separation technique platform, scope is big, Sustainable development, 2, the general situation of development of internal membrane isolation technique, we studied ion-exchange at membrane separation technique since 1958, in research ion-exchange membrane and electrodialytic while, set about the exploration of reverse osmosis membrane technology, the seventies in 20th century, electrodialysis, reverse osmosis, ultrafiltration and micro-filtration membrane module are in the research and development.The eighties, the membrane sepn process began to be applied in the tap water field.Begin to enter food, medicine, biological field after the nineties.
Summary of the invention
The purpose of this invention is to provide a kind of process for treating industrial waste water, separation factor is more much bigger, isolating high-performance, energy consumption is lower, separated object heating or refrigerative consumption are very little, and can accomplish that parameter reclaims, near the working temperature (25 ℃) room temperature of most membrane sepn processes, be specially adapted to processing to heat-sensitive materials, membrane sepn is at food, medicine, biological technical field has its unique suitability, make a lot of products after processing, still keep original nutrient contents and local flavor, membrane separation technique is used for Industrial Wastewater Treatment, with efficent use of resources, for the industry energy conservation consumption reduction, reduce cost, create recycling economy and become possibility.
A kind of process for treating industrial waste water, its technical process is as follows: one, pre-treatment:
1: according to the water quality situation of waste water in the raw water box, pop one's head in, add soda acid automatically, the pH value of former water is transferred to neutrality, enter in the waste water tank with volume pump and pH value;
2: throw the waste water tank water outlet into the quartz sand filtration device with water pump, this strainer is selected the glass reinforced plastic material for use, the refining quartz sand of the inside filling;
3: the water outlet of quartz sand filtration device enters charcoal filter, and the model of activated carbon is selected according to water-quality constituents, generally selects for use and electroplates special-purpose carbon;
4: the charcoal filter water outlet enters the KDF strainer, and KDF is highly purified copper zinc particle, is to come work by the ionic redox reaction, can remove chlorine residue and heavy metal ion in the water;
The water outlet of 5:KDF strainer enters accurate filter, and accurate filter can prevent that colloidalmaterial and little particle water from entering the film system;
6: the accurate filter water outlet enters ultrafiltration UF device, ultrafiltration UF device is a kind of membrane sepn process between NF or RO and MF, be separated into mechanism with sieve aperture, this with the film of molecular weight cut off 8-10 ten thousand to hold back macromolecular substance such as colloid greater than this molecular weight, organism, pigment, bacterium;
Two, pretreated water provides power to enter the reverse osmosis (RO) device by high-pressure pump:
1, reverse osmosis (RO) is to be impellent with pressure, by the utilisation technology of selective permeation film with solute in the solution and separated from solvent;
2, the reverse osmosis (RO) device separates solutes such as water and salt heavy metal ion, and penetrating fluid produces water and enters the collection water tank for producing water, for water of productive use, solute partly is a concentrated solution, and the concentration of heavy metal ion of concentrated solution is very high, the water yield is about 10% of flooding quantity, and concentrated solution enters flocculation sedimentation tank;
3, drop into the flocculation agent concentrated solution through behind the flocculation sediment solid matter being filtered discharge at flocculation sedimentation tank, deliver to professional treatment mechanism and carry out metal recovery, solution partly returns the raw water box circular treatment;
4, reverse osmosis (RO) Design of device:
(1): according to water source and the definite type of using membrane element of the water yield;
(2):, determine the quantity of membrane element, the rate of recovery of the arrangement mode of membrane module and reverse osmosis (RO) device according to water production rate and product water requirements in water quality;
(3): the type selecting of carrying out high-pressure pump according to the required promotion pressure of the membrane module that calculates;
(4): configuration instrument, valve.
The whole system of this method has been installed back-purge system, back-purge system is by producing the water inlet of water direction, before each filtration unit sewage draining exit is arranged, but complete assembly back flushing, also can single part back flushing, backwashing water enters former pond after 5 μ m cloth envelop collectors filter, back flushing is set every operation and was carried out once in 2 hours, produce the water water quality and the water yield with the assurance system, system is equipped with the medicine cleaning device in addition, and no matter how perfect whole system is, all can be subjected to contaminated water source, therefore needing the medicine cleaning device to carry out the timing medicine washes, it is the programmable logic controller PLC on basis that microprocessor is all adopted at each reference mark of whole system, has very strong calculation function, can finish complicated operations, to realize control to total system, this system has improved traditional electroplating waste processing process, and water resources can recycle significantly reduce environmental pollution, meets the national sustainable development strategy, to bring remarkable economical, environment and social benefit.
Embodiment
A kind of process for treating industrial waste water, its technical process is as follows:
One, for guaranteeing the safe reliability and the economy of the operation of film UF (RO) device, the former water of waste water must comprise through preprocessing part:
1: according to the water quality situation of waste water in the raw water box, pop one's head in volume pump and pH value, Automatic Dosing (acid or alkali) transfers to neutrality with the pH value of former water, enters in the waste water tank;
2: throw the waste water tank water outlet into the quartz sand filtration device with raw water pump, this strainer is selected the glass reinforced plastic material for use, the refining quartz sand of the inside filling;
3: the water outlet of quartz sand filtration device enters charcoal filter, and the model of activated carbon is selected according to water-quality constituents, generally selects for use and electroplates special-purpose carbon;
4: the charcoal filter water outlet enters the KDF strainer, and KDF is highly purified copper zinc particle, is to come work by the ionic redox reaction, can remove chlorine residue and heavy metal ion in the water;
The water outlet of 5:KDF strainer enters accurate filter, and accurate filter can prevent that colloidalmaterial and little particle water from entering the film system;
6: accurate filter is posted water and is entered ultrafiltration UF device, ultrafiltration UF device is a kind of membrane sepn process between NF or RO and MF, be separated into mechanism with sieve aperture, this with the film of molecular weight cut off 8-10 ten thousand to hold back colloid greater than this molecular weight, organism, pigment, macromolecular substance such as bacterium.
Two, pretreated water provides power to enter the reverse osmosis (RO) device by high-pressure pump (selecting stainless steel for use).
1: reverse osmosis (RO) is to be impellent with pressure, by the utilisation technology of selective permeation film with solute in the solution and separated from solvent.
2: the reverse osmosis (RO) Design of device.
(1): according to water source and the definite type of using membrane element of the water yield;
(2):, determine the quantity of membrane element, the rate of recovery of the arrangement mode of membrane module and reverse osmosis (RO) device according to water production rate and product water requirements in water quality;
(3): the type selecting of carrying out high-pressure pump according to the required promotion pressure of the membrane module that calculates;
(4): configuration instrument, valve.
3: the reverse osmosis (RO) device separates solutes such as water and salt heavy metal ion, and penetrating fluid produces water and enters the collection water tank, for water of productive use for producing water.Solute partly is a concentrated solution, and the concentration of heavy metal ion of concentrated solution is very high, and the water yield is about 10% of flooding quantity, and concentrated solution enters flocculation sedimentation tank.
4: drop into flocculation agent pharmaceutical chemicalss such as () polymerize aluminum chlorides concentrated solution at flocculation sedimentation tank and discharge through behind the flocculation sediment solid matter being filtered, delivering to professional treatment mechanism carries out metal recovery, and solution partly returns the raw water box circular treatment.
Before the technology of membrane sepn occurs, separation technology such as distillation, absorption, extraction, deep cooling have been arranged in widespread use, to compare with these traditional isolation technique, membrane sepn has following characteristics:
The first, normally sepn process efficiently of membrane sepn.For example, press material, the isolating field of granular size at this, based on gravity be that the isolation technique minimum limit is a micron (a μ m), membrane sepn can accomplish with relative molecular weight be several thousand in addition the material of hundreds of separate (corresponding granular size is nano level nm).Compare with diffusion process again, the ratio of the relative volatility of material is mostly less than 10 in still-process, and difficult separating mixture is sometimes only than a little bigger slightly, and the separation factor of membrane sepn is more much bigger.Surpass 90% the aqueous solution near constant boiling point as alcohol concn, distillation is difficult to separate.But the separation factor of infiltration gasification is a hundreds of.For another example separating of nitrogen and hydrogen, ordinary method not only will be carried out under low-down temperature, and hydrogen (H
2)/nitrogen (N
2) relative volatilization very little, in membrane sepn, with polysulfone membrane separation of hydrogen, nitrogen, separation factor is 80 right left sides, the polyamide film then surpasses 120, this be because the separation factor major decision of still-process the physics of various materials, chemical property in the mixture, and also can add the factors such as characteristic, structure, form of high polymer material in the membrane sepn process, therefore shown isolating high-performance.
The second, membrane sepn process energy consumption is lower, and most of membrane sepn processes all do not have " phase " and change.Traditional evaporation, distillation, extraction, absorption, absorption or the like process all be the variation of liquid phase or absorption phase, main gas phase, and phase change latent heat is very big.The membrane sepn process is normally carried out under room temperature (normal temperature), and separated object heating or refrigerative consumption are very little, and can accomplish that parameter reclaims.
Three, near the working temperature of most membrane sepn processes (25 ℃) room temperature is specially adapted to the processing to heat-sensitive materials, and membrane sepn has its unique suitability at food, medicine, biological technical field.For example in antibiotic production, generally remove water with underpressure distillation, be difficult to avoid fully the local superheating phenomenon of equipment, it is destroyed after local superheating area microbiotic is heated, produce toxic substance, it is the major reason that causes antibiotic side effect, and the membrane sepn process is carried out at normal temperatures, guarantee not take place superheating phenomenon, improved the security that medicine uses greatly.And for example: in foodstuff production, the membrane sepn permeate water replaces traditional distilled water, makes a lot of products still keep original nutrient contents and local flavor after processing.
Four, membrane separation technique is used for Industrial Wastewater Treatment, with efficent use of resources, is the industry energy conservation consumption reduction, and reducing cost, create recycling economy becomes possibility.The electroplate rinsing water treatment reclamation set of my designed development adopts the design of zero release closed circuit circulatory system, has fully represented its social value and the value of environmental protection.For example, electroplating company limited by my designed Shanghai Du who undertakes the construction of, is that the tame wheel hub that the investment in China of AM General company is built is electroplated joint venture, is an automotive hub electroplating assembly line of present domestic maximum.On the membrane sepn basis, we utilize integrated membrane technique, press blunderbuss kind plating bath chemical property, carry out preposition pre-treatment, configuration DGF/ACF/KDF/MF/UF/NF/ system with unit simple substance respectively, and every day, treatment capacity was 480m
3/ d handles back reuse water 360m
3/ d, the electroplate liquid rate of recovery 10%, system refluxes 15%, causes to electroplate showing great attention to of industry association and other every profession and trade personage.Innovation point is to utilize the molecule screening mechanism, is that carrier is created ion screening-hydrostatic pressure difference promotion principle with the high-polymer membrane, makes through liquid to purify, and trapped substance concentrates; It is that present up-to-date filter method can be widely used in printing and dyeing industry, paper industry, chemical industry wastewater treatment that the preposition equipment for separating liquid from solid of fluid lamination adopts the turbulent flow technology, and city domestic sewage is handled, swimming-pool water is handled, and this technology belongs to the leading level in the world.
The low-consumption high-efficiency process control is that its desalting efficiency of the most significant innovative point of this technology has reached 99.5% degree; Difficulty is how to overcome film self-pollution and problem of pressure drop.
Operational path and major equipment:
Operational path is based upon on the raw wastewater water quality basis, and the existing certain standard of Process Route is had any different again in different classes of waste water requirement.Water unit is varied, and requirements in water quality is not quite similar, and also has because the technology difference in same industry, and the requirement of water also is not quite similar, and the user must be according to own production requirement, proposes suitable oneself water water quality requirement.So the design of operational path at first is according to the user reuse water requirement to be satisfied in the requirement of wastewater treatment, to realize the requirement of user's production line water in a word.Several basic water quality requirement to the reuse of trade effluent water reason: be better than the comprehensive one-level of country and enter standard and be better than the tap water requirement; To some process waters require near or reach the pure water requirement; Controlling index to technology and water treating equipment production:
COD5 clearance≤10;
BOD clearance≤50;
PH value=6.8～7.2
Specific conductivity＜30
Ratio of desalinization＞95%
Enrichment factor is not less than 10g/L (single loop concentrates);
The production of processing wastewater treatment facility is mainly produced and is disposed by Waste Water Treatment, be divided into mechanism with molecular sieve and ion(ic)sieve, with the treating processes is means, designs preposition pretreatment system, molecule diced system, film separating system warp and after-treatment system respectively.
Necessary work in the early stage that membrane separation plant is made:
The design application of membrane separation technique is to analyze according to the problem that need solve, and also will test sometimes, otherwise can not provide definite answer.Because the analytical data that has is incomplete, some parameter is more general, for example the parameters such as raw wastewater COD, residue on evaporation and adsorbable organohalogen compound that propose during wastewater treatment characterize, in these parameter back, may be residual to the mould material objectionable constituent.So equipment configuration and type selecting be a necessary process of our work often, Here it is design evaluation.The following production unit of assessment possibility program mainly contains:
(1) testing laboratory assay device;
(2) COD, BOD detector;
(3) ORP detector;
(4) electricity is led detector;
(5) chromatograph;
(6) the indispensable glassware of chemical examination;
(7) welding and cutting device;
(8) sheet metal equipment;
(9) other instrument.
Claims (2)
1. process for treating industrial waste water, it is characterized in that: its technical process is as follows:
One, pre-treatment:
1: according to the water quality situation of waste water in the raw water box, pop one's head in, add soda acid automatically, the pH value of former water is transferred to neutrality, enter in the waste water tank with volume pump and pH value;
2: throw the waste water tank water outlet into the quartz sand filtration device with raw water pump, this strainer is selected the glass reinforced plastic material for use, the refining quartz sand of the inside filling;
3: the water outlet of quartz sand filtration device enters charcoal filter, and the model of activated carbon is selected according to water-quality constituents, selects for use and electroplates special-purpose carbon;
4: the charcoal filter water outlet enters the KDF strainer, and KDF is highly purified copper zinc particle, is to come work by the ionic redox reaction, can remove chlorine residue and heavy metal ion in the water;
The water outlet of 5:KDF strainer enters accurate filter, and accurate filter can prevent that colloidalmaterial and little particle water from entering the film system;
6: the accurate filter water outlet enters ultrafiltration UF device, ultrafiltration UF device is a kind of membrane sepn process between NF or RO and MF, be separated into mechanism with sieve aperture, this with the film of molecular weight cut off 8-10 ten thousand to hold back colloid, organism, pigment, bacterium macromolecular substance greater than this molecular weight;
Two, pretreated water provides power to enter the reverse osmosis (RO) device by high-pressure pump:
(1), reverse osmosis (RO) is to be impellent with pressure, by the utilisation technology of selective permeation film with solute in the solution and separated from solvent;
(2), the reverse osmosis (RO) device separates water with salt heavy metal ion solute, penetrating fluid produces water and enters the collection water tank for producing water, for water of productive use, solute partly is a concentrated solution, and the concentration of heavy metal ion of concentrated solution is very high, the water yield is 10% of a flooding quantity, and concentrated solution enters flocculation sedimentation tank;
(3), drop into the flocculation agent concentrated solution at flocculation sedimentation tank and discharge through behind the flocculation sediment solid matter being filtered, deliver to professional treatment mechanism and carry out metal recovery, solution partly returns the raw water box circular treatment.
2. according to the described a kind of process for treating industrial waste water of claim 1, it is characterized in that the reverse osmosis (RO) Design of device:
(1): according to water source and the definite type of using membrane element of the water yield;
(2):, determine the quantity of membrane element, the rate of recovery of the arrangement mode of membrane module and reverse osmosis (RO) device according to water production rate and product water requirements in water quality;
(3): the type selecting of carrying out high-pressure pump according to the required promotion pressure of the membrane module that calculates;
(4): configuration instrument, valve.
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| CN2006100184960A CN101028958B (en) | 2006-03-04 | 2006-03-04 | Method for treating industrial waste water |
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| CN2006100184960A CN101028958B (en) | 2006-03-04 | 2006-03-04 | Method for treating industrial waste water |
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| CN101028958B true CN101028958B (en) | 2010-10-13 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101838071B (en) * | 2010-05-11 | 2013-05-15 | 珠海市蓝金环保科技有限公司 | Electroplating reclaimed water recycling and treating system |
| US8491680B2 (en) * | 2010-05-25 | 2013-07-23 | Veolia Water Solutions & Technologies North America, Inc. | Gasification process |
| CN102010033B (en) * | 2010-12-05 | 2012-09-26 | 中山市三角镇环保科技创新中心 | Electroplating wastewater reverse osmosis membrane treatment method adopting energy recovery device |
| CN102715851A (en) * | 2011-03-29 | 2012-10-10 | 天津市食品加工工程中心 | Water-saving fruit and vegetable cleaning device |
| CN102336481A (en) * | 2011-06-03 | 2012-02-01 | 泉州市碧蓝环保科技有限公司 | Process for reclaiming copper and nickel from electroplating rinse waste water and implementing zero discharge of waste water |
| CN102372384B (en) * | 2011-07-21 | 2012-12-19 | 青岛沈源水务科技有限公司 | Movable water purifying equipment |
| CN103626316B (en) * | 2013-11-28 | 2015-08-12 | 深圳职业技术学院 | A kind of for the emergency treatment device by heavy metal contamination drinking water source |
| CN106448787B (en) | 2014-01-09 | 2018-10-02 | 清华大学 | A kind of method and apparatus of Spent Radioactive water process |
| CN109745761B (en) * | 2017-11-03 | 2021-12-17 | 青岛海尔洗涤电器有限公司 | Drainage device and control method thereof |
| CN109467241A (en) * | 2018-10-29 | 2019-03-15 | 深圳骏泽环保有限公司 | The board wastewater treatment process of copper ion zero-emission |
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Assignee: Quanzhou Bland Environmental Protection Technology Co.,Ltd. Assignor: Lin Bingjin Contract record no.: 2010990000979 Denomination of invention: Industrial wastewater treatment method and system Granted publication date: 20101013 License type: Exclusive License Open date: 20070905 Record date: 20101214 |
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