CN202164179U - Zero-discharge concentration treatment equipment for nickel-containing wastewater - Google Patents
Zero-discharge concentration treatment equipment for nickel-containing wastewater Download PDFInfo
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- CN202164179U CN202164179U CN2011202446610U CN201120244661U CN202164179U CN 202164179 U CN202164179 U CN 202164179U CN 2011202446610 U CN2011202446610 U CN 2011202446610U CN 201120244661 U CN201120244661 U CN 201120244661U CN 202164179 U CN202164179 U CN 202164179U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
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Abstract
The utility model discloses zero-discharge concentration treatment equipment for nickel-containing wastewater. The zero-discharge concentration treatment equipment comprises a sedimentation tank, a raw water booster pump, an asymmetrical fiber filter, a quartz sand filter, cation resin exchanger, an active carbon filter, a recycling water tank, a first booster water pump, a first cartridge filter, an ultrafiltration system, an ultrafiltration water tank, a second cartridge filter, a primary RO (Reverse Osmosis) concentration system, a secondary RO concentration system, a secondary RO concentration water tank, a second booster water pump, a third security filter, a tertiary RO concentration system, a tertiary RO concentration water tank, a third booster water pump, a fourth security filter, a quartus RO concentration system and an evaporator which are mutually connected in sequence, wherein a PLC (Programmable Logic Controller) electric control system is connected with the 23 equipment units above. In the zero-discharge concentration treatment equipment, as dense water is subjected to concentration treatment of four-level membrane separating systems, raw water can be concentrated to 2.16%-5.78% of original concentration, the purpose of realizing zero discharge is realized by adopting a treatment technology route of recycling purified water, concentrating thick water as well as desalinating and recovering dense water, and national guidelines and policies on environmental protection are responded.
Description
Technical field
The utility model relates to a kind of nickel-containing waste water zero release concentration equipment.
Background technology
In the prior art; General, nickel-containing waste water zero release concentration equipment is made up of former pond → former water topping-up pump → disc filter → activated carbon adsorption system → full-automatic ultrafiltration system → intermediate water tank → middle water pump → security personnel's strainer → full-automatic reverse osmosis system (containing washing unit) → water reservoir basically, yet; Its defective part is: the purpose that can't reach wastewater zero discharge; Contain heavy metal ion and a large amount of recyclable salts in the reverse osmosis concentrated water, reverse osmosis system has only one-level, is difficult to realize wastewater zero discharge; The reuse water yield is limited, and the dense water yield is big.
The utility model content
The purpose of the utility model provides a kind of nickel-containing waste water zero release concentration equipment.
The technical scheme that the utility model is taked is:
A kind of nickel-containing waste water zero release concentration equipment comprises that the settling tank that is linked in sequence successively, former water topping-up pump, asymmetrical fibre strainer, quartz sand filtration device, resin cation exchange device, charcoal filter, reuse pool, first booster water pump, first security personnel's strainer, ultrafiltration system, ultrafiltration water tank, second security personnel's strainer, one-level RO concentration systems, secondary RO concentration systems, secondary RO concentrate the PLC electrical control system that water tank, second booster water pump, the 3rd security personnel's strainer, three grades of RO concentration systems, three grades of RO concentrate water tank, the 3rd booster water pump, the 4th security personnel's strainer, level Four RO concentration systems, vaporizer, are connected with aforementioned 23 units.
Be provided with an acid-alkali regeneration system in the described Zeo-karb interchanger.
Be provided with a chemically-cleaning device in the described ultrafiltration system.
Described chemically-cleaning device is made up of scavenging pump, cleaning water tank, cleaning micro-filter.
Also be provided with backwash water pump and the chemical chemicals dosing plant of a cover in the described ultrafiltration system.
The beneficial effect of the utility model is: 1, the dense water concentration through the level Four film separating system, former water can be concentrated to original 2.16% ~ 5.78%, when former electrical conductivity of water is 1000～3000 μ S/cm; The dense water conductivity of level Four can reach 10000～32000 μ S/cm; Saltiness is high, and water cut is low, can alleviate the burden of vaporizer; Reduce the required current consumption of evaporative crystallization, reduce the cost that salt reclaims.Improve the reuse water yield simultaneously, practiced thrift the fresh water consumption of every day.
2, through implementing " water purification reuse, concentrated, the desalination recovery of dense water " treatment technology route, realize the purpose of nickel-containing waste water zero release, responded the principles and policies of country about environmental protection work.
Description of drawings
Fig. 1 is the structured flowchart of the utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described.
Embodiment 1:
Like Fig. 1; A kind of nickel-containing waste water zero release concentration equipment comprises that the settling tank 1 that is linked in sequence successively, former water topping-up pump 2, asymmetrical fibre strainer 3, quartz sand filtration device 4, resin cation exchange device 5, charcoal filter 6, reuse pool 7, first booster water pump 8, first security personnel's strainer 9, ultrafiltration system 10, ultrafiltration water tank 11, second security personnel's strainer 12, one-level RO concentration systems 13, secondary RO concentration systems 14, secondary RO concentrate the PLC electrical control system 24 that water tank 15, second booster water pump 16, the 3rd security personnel's strainer 17, three grades of RO concentration systems 18, three grades of RO concentrate water tank 19, the 3rd booster water pump 20, the 4th security personnel's strainer 21, level Four RO concentration systems 22, vaporizer 23, are connected with aforementioned 23 units.
When using this practical equipment to carry out the processing of nickel-containing waste water, through the running of PLC electrical control system 24 a coordination control assembly of elements, at first, nickel-containing waste water gets into settling tank 1; Former then water topping-up pump 2 pumps into asymmetrical fibre strainer 3 with waste water, removes impurity such as colloid, silt, reduces turbidity, then gets into quartz sand filtration device 4; Further remove suspended substance etc., reduce the turbidity of waste water, waste water gets into resin cation exchange device 5 again, removes the heavy metal ion in the waste water; Then get into charcoal filter 6, pollution substances such as the chlorine that exists in the waste water, small organic molecule are removed in absorption, get in the reuse pool 7 again, and first booster water pump 8 pumps into first security personnel's strainer 9 with water again; Remove in anhydrating greater than the impurity of 5 μ m, get into ultrafiltration system 10 again, further remove the colloid in the waste water; Impurity such as mikrobe, the water after the processing gets in the ultrafiltration water tank 11, gets into second security personnel's strainer 12 again; Further remove the impurity greater than 5 μ m that possibly exist, then get in the one-level RO concentration systems 13 and carry out thickening, dehydration rate reaches 60-70%; Get into secondary RO concentration systems 14 again, dehydration rate reaches 45-55%, and dense water gets into secondary RO again and concentrates water tank 15; Second booster water pump 16 pumps into the 3rd security personnel's strainer 17 with water, and waste water gets into three grades of RO concentration systems 18, dehydration rates again and reaches 40-50%, gets in three grades of concentrated water tanks 19 to store again; Water after the 3rd booster water pump 20 will concentrate again pumps into the 4th security personnel's strainer 21, gets into level Four RO concentration systems 22 again, and dehydration rate reaches 20-30%; The water inlet saltiness of considering reverse osmosis membrane is very high, in the reverse osmosis membrane employing high density antipollution of one-level secondary/high-pressure membrane, operating pressure reaches 1.55MPa and 2.2MPa respectively; Three grades are adopted dehydration to concentrate the membrane sepn film, and operating pressure reaches 2.2-2.6MPa; Level Four adopts dehydration to concentrate the membrane sepn film, and operating pressure reaches 2.5-3.0MPa, guarantees under the situation of high salt water gaging matter the normal operation of dehydration concentration systems.Water after concentrating gets into evaporation in the vaporizer 23 again, reclaims and obtains salt.
Ultrafiltration and level Four RO concentration systems are provided with chemically-cleaning device, receive when polluting when diaphragm waits, and in time recover the performance of film through matting, prolong the work-ing life of film; The resin cation exchange device is provided with the acid-alkali regeneration system, guarantees the regeneration of resin use; Ultrafiltration system is provided with backwash water pump and the chemical chemicals dosing plant of a cover, can add chemical agent during backwash and help to clean.The complete support equipment of each item is the handling property of recovery system timely, prolongs the work-ing life of each assembly, and the assurance system moves under the best performance state, obtains stablizing good treatment effect.
System control aspect, ultrafiltration system and three grades of RO concentration systems are provided with multiple self-reacting device control and protection; Ultrafiltration system operation, backwash automatically, just wash, need not manual operation; Three grades of RO concentration systems are provided with automatic washing function, use flushing with clean water by the time auto of setting, and in time remove the pollutent on film surface, prolong the work-ing life of film.Adopt the PLC programmable logic controller to the total system overhead control, for making things convenient for the system debug and the needs of repair apparatus in the future, the ad hoc function of stopping in emergency is guaranteed security of system, efficient, steady, economical operation.
The function of some equipment that relate to is following:
Settling tank
The nickeliferous factory effluent of collection after owner's pre-treatment utilizes precipitating action to remove the big suspended substance in the waste water.Skeleton construction is furnished with liquidometer.
Former water topping-up pump
Former water topping-up pump provides the required water yield and pressure for purifying pretreatment system, realizes automatic start-stop by institute of system to signal, also can hand-operated forced start and stop.Former water topping-up pump is 2, the using and the reserved.
The asymmetrical fibre strainer
Asymmetrical fibre strainer (AFF) be seattle, u.s.a environmental science and technology company research and development a equipment can use separately, also can be used with flocculation agent to middle water reuse solid waste fast purification equipment, solid waste in the water purifies water in removing.
The quartz sand filtration device
The quartz sand filtration device is made up of hay tank, quartz sand filler, by-pass valve control and connecting tube.
Be filled with meticulous silica sand in the quartz sand filtration device.This device generally can be removed 60～80% humic acid material.When former water passes through the silica sand filtering layer; Impurity such as the suspended substance in the water, mechanical particle, colloid are through sinuate duct in the filter material layer of flowing through, because the contact action of filter material surface, suspended substance and filter material surface adhesive attraction; Make in the former water impurity obtain removing; Thereby significantly reduce the turbidity of water, and prevent to stop up the pore and the carbon-coating hole of back level active carbon, to improve the adsorption effect of activated carbon.Along with increasing of filtration time and filtration water outlet; Silica sand is held back solid impurity and is also increased; Increase falls in the pressure of strainer water-in and water-out, and when operating pressure falls＞tolerable limit of 0.05Mpa or surpass backwash cycle of regulation, the quartz sand filtration device need carry out positive and negative washing; Backwash should be carried out under the prerequisite of two times of operation flows, to reach better cleaning performance.Through positive and negative surface contaminants, the impurity of holding back to remove quartz sand filtration time of washing, to recover the filtration capacity of quartz sand filtration device, to guarantee filter effect.
The resin cation exchange device
The resin cation exchange device is made up of swap tank, D113 Zeo-karb filler, by-pass valve control, acid-alkali regeneration system and connecting tube.
The ion exchange resin interchanger is to adopt divalent-metal ions such as zinc in the D113 type exchange resin replacing water, nickel, iron, chromium, and the D113 type is meant on the acrylic acid copolymer cross-linked polymer matrix of macroporous structure and has carboxylic acid group's (ion exchange resin COOH).D113 type resin on the market is a H+ type Weak-acid cation; According to actual use experience, the Na+ kenel has more active switching performance, and suggestion transfers resin to the Na+ type before using; Concrete operations comprise exchange, recoil, regeneration, drip washing, transition five steps, and its main technologic parameters sees the following form:
Charcoal filter
Charcoal filter is made up of hay tank, activated carbon filler, by-pass valve control and connecting tube.
Load high-quality cocoanut tree shell activated carbon in the active carbon filtration adnexa, have the advantages that rate of adsorption is fast, loading capacity is big.The effect of this equipment is effectively to remove low molecule organic matter and free chlorine in the water; Also can reduce simultaneously peculiar smell and the colourity in the water; Therefore get into charcoal filter through the water behind the mechanical filter, the chlorine residue of trace is removed by the rapid absorption of activated carbon in the water, comprises that carcinogens haloform (THM) and halogen acetic acid can both be by the activated carbon active adsorption; The removal of the chlorine residue in the water can make the RO film can not receive the infringement of impurity such as chlorine and prolongs its work-ing life.Can effectively prevent the Organic pollutants on reverse osmosis membrane surface as the pretreating device of reverse osmosis system, and not receive the influence of itself inflow temperature, pH value and organic mixture.Behind charcoal filter work certain hour, need the activated carbon surface dirt is carried out backwash, just washes, to recover the filter effect of charcoal filter, because activated carbon proportion is less, the backwash flow should be 0.7 times of operation flow.
Reuse pool
Store the water outlet that purifies pretreatment system, skeleton construction is furnished with liquidometer.
Topping-up pump
Topping-up pump rises to the subsequent disposal system purifying waste water from reuse pool, for ensure public security strainer and uf processing system provide the required water yield and pressure, realize automatic start-stop by institute of system to signal, also can hand-operated forced start and stop.
Security personnel's strainer
Security personnel's strainer is made up of filter housing and 5 μ PP filter cores.
Mainly be that the above particle of 5 μ and broken activated carbon granule or resin get into follow-up equipment in utilizing the cotton filter core interception of 5 μ PP to remove to purify waste water, thereby the film spare of protection ultrafiltration system prevent the obstruction and the damage of fenestra.
Ultrafiltration system
Ultra-filtration membrane is to utilize nano level physical pore size that the material in the feed liquid is separated. purifies. and purifying is with concentrated; Major function is suspended substance, colloid, mikrobe, bacterium, virus, the larger molecular organics of dispeling in the liquid; The turbidity of degradation liquid, COD and BOD further purify the water inlet of RO system, thereby the protection reverse osmosis membrane guarantees the normal operation of reverse osmosis system.
Film title: ultra-filtration membrane
Molecular weight cut-off: 150,000 dalton
Film silk material: modified polyvinyl chloride (PVC)
Maximum intake pressure: 0.5MPa
The maximum mould of passing through is poor: 0.2MPa
Maximum backwash pressure: 0.2MPa
Advance water ph value: 2-12
Use temperature: 5 ℃-45 ℃
Produce water turbidity: < 0.1NTU
Contamination density index: (SDI) < 1
Suspended substance, particulate: (> 0.2 μ m) 100% remove
This ultrafiltration system is fully automatic operation, backwash, just washes, and is furnished with 1 backwash water pump and the chemical chemicals dosing plant of a cover, can add chemical agent and help backwash, and other is provided with a cover chemically-cleaning device, can carry out chemical cycle and clean.
The ultrafiltration water tank
The ultrafiltration water tank comprises ultrafiltration water storage tank, high, medium and low three cover liquidometers, 10 " air filter, connecting tube.
The ultrafiltration water tank is used to store ultrafiltration system and produces water, as the water inlet of RO system, for the cleaning of ultrafiltration system provides the water yield.Built-in air filter and liquidometer provide system's required water level signal and lack of water guard signal of control automatically.
Level Four RO concentration systems
(1) HPP
HPP is used to provide the pressure and the water yield of r-o-operation, guarantees that the normal operation native system of reverse osmosis concentrated compression system all is provided with low-tension switch before three grades of HPPs, is provided with high-voltage switch gear behind the pump, avoids operation of HPP lack of water or overlond running.
(2) membrane module specification and technical indicator
1. press mold component specification and technical indicator in the one-level high density antipollution:
Enrichment factor: 60-70%
Membranous type: press mold in 8 cun high density antipollutions
Brand: LG-DOW FILMTEC
TM
Pressurized vessel: 300psi
Material: glass reinforced plastic
The place of production: Jiangsu
Maximum operating temperature: 45 ℃
Water inlet chlorine residue: < 0.1PPM
Index: SDI < 5 is silted in water inlet up
2. two-pass reverse osmosis membrane module specification and technical indicator:
Enrichment factor: 45%～55%
Membranous type: 8 cun high density antipollution high-pressure membranes
Brand: LG-DOW FILMTEC
TM
Pressurized vessel: 450psi
Material: glass reinforced plastic
The place of production: Jiangsu
Maximum operating temperature: 45 ℃
Water inlet chlorine residue: < 0.1PPM
Index: SDI < 5 is silted in water inlet up
Dense water conductivity: 5000～15000 μ S/cm;
3. three grades of dehydrations concentrate membrane module specification and technical indicator:
Enrichment factor: 40%～50%
Membranous type: high density antipollution separatory membrane
Brand: LG-DOW FILMTEC
TM
Pressurized vessel: 600psi/ glass reinforced plastic material
The place of production: Jiangsu
Maximum operating temperature: 40 ℃
Water inlet chlorine residue: < 0.1PPM
Index: SDI < 5 is silted in water inlet up
Dense water conductivity: 10000～32000 μ S/cm;
4. the level Four dehydration concentrates membrane module specification and technical indicator:
Enrichment factor: 20%～30%
Membranous type: high density antipollution separatory membrane
Brand: LG-DOW FILMTEC
TM
Pressurized vessel: 600psi/ glass reinforced plastic material
The place of production: Jiangsu
Maximum operating temperature: 40 ℃
Water inlet chlorine residue: < 0.1PPM
Index: SDI < 5 is silted in water inlet up
Dense water conductivity: 13000～38000 μ S/cm;
The native system reverse osmosis membrane adopts LG-DOW FILMTEC
TMBrand, at first since the composite package of utility model practicality, film and utilisation technology thereof have just obtained unprecedented development in the world in Tao Shi FilmTec company, and the developing in many fields and mass-producing thereof are used all from using the Tao Shi membrane element to begin FILMTEC
TMThe r-o-of brand is acknowledged as higher, the more consistent and more stable separatory membrane reputable brand of performance with the nf membrane product; Share of market the first in the world proves that through user's life-time service the life-span of film is long; Stable performance; Be difficult for polluting, it is restorative good to clean, and it is only in produced in usa and the earliest through strict ISO9000 Quality System authentication.
In the high density antipollution of LG-DOW/high film/nf membrane still is rich in the Application Areas of pollutents such as biological and organism at former water; Show remarkable contamination resistance and characteristic capable of washing, and demonstrated outstanding contamination resistance and system's performance driving economy all over the world in a large amount of clients' the use.
Native system will adopt Mitsubishi PLC programmable logic controller that reverse osmosis module is carried out special control and protection; Any improper operation or mechanical factor are caused fault; System is interrupt run at once, guarantees to produce the quality and the output of water effectively, makes security of system, stable, efficient operation.This system is ad hoc to be had automatically and manual two kinds of working ordeies, has full/lack of water interlock, height/low-voltage variation, fault alarm, monitoring water quality on line, and multiple automatic interlock defencive function or the like is set.
Chemically-cleaning device
Chemically-cleaning device is made up of scavenging pump, cleaning water tank, cleaning micro-filter, is used for the dirt of clean deposition on the film surface, recovers the performance of reverse osmosis membrane to greatest extent.
Secondary RO concentrates water tank
Secondary RO concentrates water tank and is used to store secondary RO concentration systems condensed water, and built-in air filter and liquidometer provide system's required water level signal and lack of water guard signal of control automatically.
Three grades of RO concentrate water tank
Three grades of RO concentrate water tank and are used to store three grades of concentration systems condensed water, and built-in air filter and liquidometer provide system's required water level signal and lack of water guard signal of control automatically.
Level Four RO concentrates water tank
Level Four RO concentrates water tank and is used to store level Four concentration systems condensed water, and built-in air filter and liquidometer provide system's required water level signal and lack of water guard signal of control automatically.
The related unit of the utility model is known device in the industry.
Claims (5)
1. nickel-containing waste water zero release concentration equipment is characterized in that: comprise that the settling tank that is linked in sequence successively, former water topping-up pump, asymmetrical fibre strainer, quartz sand filtration device, resin cation exchange device, charcoal filter, reuse pool, first booster water pump, first security personnel's strainer, ultrafiltration system, ultrafiltration water tank, second security personnel's strainer, one-level RO concentration systems, secondary RO concentration systems, secondary RO concentrate the PLC electrical control system that water tank, second booster water pump, the 3rd security personnel's strainer, three grades of RO concentration systems, three grades of RO concentrate water tank, the 3rd booster water pump, the 4th security personnel's strainer, level Four RO concentration systems, vaporizer, are connected with aforementioned 23 units.
2. a kind of nickel-containing waste water zero release concentration equipment according to claim 1 is characterized in that: be provided with an acid-alkali regeneration system in the described Zeo-karb interchanger.
3. a kind of nickel-containing waste water zero release concentration equipment according to claim 1 is characterized in that: be provided with a chemically-cleaning device in the described ultrafiltration system.
4. a kind of nickel-containing waste water zero release concentration equipment according to claim 3 is characterized in that: described chemically-cleaning device is made up of scavenging pump, cleaning water tank, cleaning micro-filter.
5. a kind of nickel-containing waste water zero release concentration equipment according to claim 3 is characterized in that: also be provided with backwash water pump and the chemical chemicals dosing plant of a cover in the described ultrafiltration system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202446610U CN202164179U (en) | 2011-07-12 | 2011-07-12 | Zero-discharge concentration treatment equipment for nickel-containing wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202446610U CN202164179U (en) | 2011-07-12 | 2011-07-12 | Zero-discharge concentration treatment equipment for nickel-containing wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202164179U true CN202164179U (en) | 2012-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202446610U Expired - Fee Related CN202164179U (en) | 2011-07-12 | 2011-07-12 | Zero-discharge concentration treatment equipment for nickel-containing wastewater |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102826678A (en) * | 2012-08-06 | 2012-12-19 | 宋洪华 | Chemical nickel plating waste water circulating reclamation and nickel resource circulating reutilization method |
| CN103936200A (en) * | 2014-04-22 | 2014-07-23 | 苏州羽帆新材料科技有限公司 | Treatment method of heavy metal waste water |
| CN104986900A (en) * | 2015-07-30 | 2015-10-21 | 深圳市深联发精密科技有限公司 | Water reuse treatment method and apparatus for nickel-containing electroplating wastewater |
| CN109293034A (en) * | 2018-11-29 | 2019-02-01 | 珠海杰赛科技有限公司 | A kind of processing system and processing method of nickel-containing waste water |
| CN113716746A (en) * | 2021-09-07 | 2021-11-30 | 浙江太阳石水处理有限公司 | Chemical wastewater advanced treatment system combining ultrafiltration and reverse osmosis |
-
2011
- 2011-07-12 CN CN2011202446610U patent/CN202164179U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102826678A (en) * | 2012-08-06 | 2012-12-19 | 宋洪华 | Chemical nickel plating waste water circulating reclamation and nickel resource circulating reutilization method |
| CN103936200A (en) * | 2014-04-22 | 2014-07-23 | 苏州羽帆新材料科技有限公司 | Treatment method of heavy metal waste water |
| CN104986900A (en) * | 2015-07-30 | 2015-10-21 | 深圳市深联发精密科技有限公司 | Water reuse treatment method and apparatus for nickel-containing electroplating wastewater |
| CN109293034A (en) * | 2018-11-29 | 2019-02-01 | 珠海杰赛科技有限公司 | A kind of processing system and processing method of nickel-containing waste water |
| CN113716746A (en) * | 2021-09-07 | 2021-11-30 | 浙江太阳石水处理有限公司 | Chemical wastewater advanced treatment system combining ultrafiltration and reverse osmosis |
| CN113716746B (en) * | 2021-09-07 | 2023-08-29 | 浙江太阳石水处理有限公司 | Advanced treatment system for chemical wastewater by combining ultrafiltration and reverse osmosis |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120314 Termination date: 20150712 |
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