CN103523864A - Industrial wastewater treatment method and device - Google Patents
Industrial wastewater treatment method and device Download PDFInfo
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- CN103523864A CN103523864A CN201310522338.9A CN201310522338A CN103523864A CN 103523864 A CN103523864 A CN 103523864A CN 201310522338 A CN201310522338 A CN 201310522338A CN 103523864 A CN103523864 A CN 103523864A
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Abstract
The invention relates to an industrial wastewater treatment method and an industrial wastewater treatment device. The industrial wastewater is collected by using a collection tank of a workshop. With a centrifugal elevation pump, the wastewater is pumped into a treatment water tank of the industrial wastewater treatment device with a tubular membrane filtration assembly; sodium hydroxide or potassium hydroxide is added in a delivery pipe; sufficient reaction is carried out under the stirring of the centrifugal elevation pump, such that hydroxide deposit which is insoluble in water is produced; and the water obtained after reaction is filtered by using the industrial wastewater treatment device with the tubular membrane filtration assembly. The device comprises sequentially connected components of the collection tank, the delivery pipe, and a membrane filtration device. The elevation pump is arranged on the delivery pipe. The membrane filtration device comprises the treatment water tank. The membrane filtration assembly is arranged and immersed in the treatment water tank. The membrane filtration assembly is respectively connected with a pipe delivery system. An aeration device is arranged in the treatment water tank. The membrane filtration assembly is composed of a tubular membrane filtration unit. An opened frame is arranged on the outer periphery of the tubular membrane filtration unit. A tubular filtration membrane is arranged in a sealed state on a frame plane. A water outlet pipe is arranged on the frame. With the device, solid impurities can be effectively removed, and waste water can be really turned into a resource.
Description
Technical field
The present invention relates to sewage water treatment method, relate in particular to the recovery and treatment method of the trade effluents such as plating, electroless plating, semiconductor packages, more precisely, relate to and utilize tubular membrane filter assemblies to the method that effluent containing heavy metal ions is processed that contains producing in above-mentioned production process.The invention still further relates to the industrial waste water disposal device that utilizes tubular membrane filter assemblies.
Background technology
The industry such as plating, electroless plating, semiconductor packages are all the industries that extremely relies on water resources, also be the industry of high water consumption, high pollution, especially, under the situation limited in water resources, water environment pollution increasingly sharpens, restrict water supply, lack of water, harnessing the river produces immense pressure to the production operation of enterprise.Therefore, research and practice to effective improvement of these manufacturing enterprise's water saving and pollution, contribute to promote benefit of water consumption, reduces water cost, alleviates environmental pollution.At present, the recycling of water saving, middle water reuse, waste water has become the recycling of the important measures that these dealers tackle above-mentioned situation, particularly waste water, can reduce the demand to water resources, can reduce production costs again, also reduce the pollution to environment simultaneously.
In semiconductor package process, need to use electroplating technology.Chip will clean after plating, in this process, can produce electroplating cleaning waste water.In electroplating, use some metals, so in electroplating cleaning waste water, can have the discharge of metal ion, as titanium (Ti), chromium (Cr), plumbous (Pb), tin (Sn), nickel (Ni), copper (Cu), zinc (Zn), aluminium (Al) etc.In plating or electroless plating production, plating piece cleans according to different needs, and the plating solution of selection is also different.Therefore, its principal pollutant are: the metal ions such as bronsted lowry acids and bases bronsted lowry, Ti, Cr, Pb, Sn, Ni, Cu, Zn, Al, tensio-active agent and brightening agent etc.Above-mentioned waste water quality refers to table 1:
Table 1: waste water quality
In table 1, SS is suspended solid concentration value, COD
crfor chemical oxygen demand (COD).As seen from Table 1, three part waste water qualities are very complicated, and especially the superfine suspended particle of the heavy metal ion of high density and high density is difficult to remove, and this class wastewater toxicity is larger, and some is also containing carcinogenic, teratogenesis, mutagenic highly toxic substance, very harmful to the mankind.Therefore, to above-mentioned waste water, must conscientiously recycle, accomplish to eliminate or reduce its pollution to environment.
In the prior art, wastewater treatment containing heavy metal ion adopts the methods such as chemical reduction, precipitation, absorption, micro-electrolysis, evaporation and ion-exchange at present mostly, in these traditional waste water treatment process, (1) need to use heavy dose of sodium hydroxide, flocculation agent etc., in treating processes, produce a large amount of harmful heavy metal mud; (2) treatment system floor space is large, and flow process is loaded down with trivial details; (3) complicated operation, because this part factory effluent water quality is unstable, causes effluent quality unstable, thereby cannot directly recycle water resources.In prior art, also have and relate to the patent that membrane filter method is processed electroplating wastewater, its name is called " membrane separating method of zero discharge of electroplating waste water treatment ", and application number is 03157655.9, and its publication number is CN1590322, and open day is on March 9th, 2005.The disclosed electroplating effluent treatment method of this patent adopts one-level nanofiltration membrane to filter, secondary brackish water reverse osmosis membrane filtration, and three grades of sea-water reverse osmose membrane filtrations, flow process is loaded down with trivial details, and operation energy consumption is very high, and the reclamation rate of water is lower, is only 70% left and right.Another part of name the applicant is called " a kind of clean preparation method for the treatment of electroplating waste water by nano filtering process ", application number is 200610096133.9, its publication number is CN1935678, open day is in the patent application on March 28th, 2007, mainly adopted international advanced person's nanofiltration membrane to hold back concentrated to the above metal ion of divalence, permeate direct reuse is in plating piece rinsing, working cost decreases than previous method, flow process is simple, easy to operate, invest little, but the working pressure that nanofiltration membrane is filtered is 1.8～2.2MPa, operation energy consumption is higher.
Above-mentioned water treatment method exists that treatment facility huge structure is complicated, floor space large, investment and the high problem of operation energy consumption, and treating processes need be added various chemical medicaments conventionally, to realize precipitation by metallic ion and solid particulate flocculation sediment, thereby in treating processes, produce a large amount of harmful mud.And embrane method is in recent years processed electroplating wastewater, its membrane filtration system of selecting is mainly reverse osmosis, nanofiltration system, needs pressure filtration, and operation energy consumption is high, and maintenance cost is high.
Summary of the invention
The applicant is for above-mentioned problem, be studied improvement, a kind for the treatment of process and device of electroplating wastewater are provided, whole treating processes only adds reacts required sodium hydroxide or the potassium hydroxide of the insoluble alkali of generation with heavy metal ion, then utilize tubular membrane to filter, just can effectively remove solid impurity, really realize waste water reclaiming, and treatment system is taken up an area little, safe, reliable.
Technical scheme of the present invention is as follows:
The treatment process of trade effluent, comprises the following steps:
Trade effluent utilizes the collecting tank in workshop to collect;
Utilize centrifugal lift pump that described trade effluent is squeezed into the processing pond with the industrial waste water disposal device of tubular membrane filter assemblies, in transport pipe, add sodium hydroxide or potassium hydroxide, through centrifugal lift pump, stir and make it fully react the water-fast precipitation of hydroxide of generation;
To with the industrial waste water disposal device with tubular membrane filter assemblies, filter through reacted water conservancy, the water of process membrane filtration gets final product direct reuse.
Further:
Described trade effluent is the Cleaning Wastewater that contains heavy metal ion producing while cleaning plating piece in the productions such as semiconductor packages, plating, electroless plating.
The described trade effluent that contains heavy metal ion be metal ion valence state for+2 or+3 waste water.
The described trade effluent that contains heavy metal ion is the waste water containing metal ions such as Cr, Sn, Pb, Cu, Ni, Ti, Zn, Al.
The treatment unit of trade effluent, comprise the collecting tank 1 being linked in sequence, transport pipe 2 and membrane filter appts, lift pump 3 is housed on transport pipe 2, described membrane filter appts comprises processes pond 5, process immersion system in pond 5 and have membrane filtration module 10, membrane filtration module 10 is connected with pipe-line transportation system respectively, process in pond 5 aerating apparatus is also installed, it is characterized in that: described membrane filtration module 10 consists of tubular membrane filtering unit 9, outside described tubular membrane filtering unit 9, be with an open type framework, framework face upper sealing device tubular filter film, on framework, there is rising pipe 11.
Further:
The material of described tubular membrane filtering unit 9 is pottery or PE.
Described each tubular membrane filtering unit 9 is parallel to each other.
The rising pipe 11 of described each tubular membrane filtering unit 9 is connected and is formed total rising pipe 12 by framework, and is connected with self-priming water pump 8.
On described total rising pipe 12, Water Test Kits 13 is installed.
The aeration tube 6 with solarization air cap that described aerating apparatus is installed by membrane filtration module below connects and composes with the pressure gas of gas blower 4 output terminals.
The treatment process of above-mentioned trade effluent is to comprise the comprehensive processing technique that chemical method combines with submerged pipe type membrane filtration process.Product water after processing meets " urban sewage reutilization industry water standard " (GB/T19923-2005) standard, can direct reuse.
Electroplate, the principal pollutant in chemical plating waste water are attached most importance to contaminant metal ions and organic pollutant.By add sodium hydroxide or potassium hydroxide in waste water, make heavy metal generate water-fast precipitation of hydroxide.In waste water, usually have various heavy to coexist, while containing the amphoteric metals such as Zn, Pb, Sn, Al in waste water, pH value is higher, may have tendency again, therefore will strictly control pH value, carries out fractional precipitation.Organic additive in waste water belongs to polymeric surface active agent in addition, its molecule can spontaneous and directionally be adsorbed on solid-liquid two-phase interface in solution, thereby reduced the interfacial tension between solution and solid particulate, made these solid particulates be dispersed in uniformly and stably in the aqueous solution; Secondly, have a large amount of inorganic electrolytes in waste water, play enhancement, cause many surfactant molecules to associate into state of aggregation micelle, these micelle surfaces contact, adhere to solid particulate matter in water, make micelle become large.From above-mentioned, organic dirt in this part waste water and mineral contaminants produce synergy, the above-mentioned micelle that is dispersed in the solid particulate in the aqueous solution and adheres to solid particulate matter, through submerged pipe type film of the present invention, cross after unit filtration, can be filtered removing, delivery turbidity is dropped to below 1NTU, COD
crdrop to below 50mg/L, SS drops to 0mg/L.And after filtering in residual concentrated solution, in SS concentration, by residual sea water pump, discharge during up to 10000～15000mg/L left and right, no longer need to add chemical agent, directly press filtration or take the mode of oven dry to change into free of contamination mud cake landfill.Like this, very unmanageable organism and heavy metal ion are easy to be removed under above-mentioned chemical action and synergy originally.
Tubular membrane filtering unit of the present invention has following distinguishing feature in application: sieve effect is held back or held back to (1) physics, the pore size filter of its mean pore size film is 0.1 μ m～5 μ m, tubular membrane runner 10mm～25mm, material is the organic membrane such as pottery that chemical resistant properties is very strong, PE, can effectively hold back less solid ingredient; (2) suction type filtering, employing is filtered from external-compression type outside to inside, and during filtration, transmembrane pressure is less than 20KPa, and operation energy consumption is low; (3) membrane flux is large, adopt the mode of aeration at the parallel direction formation air water stream on film surface, and sewage filter water outlet, the so effectively degree of cleaning of face in the vertical direction of film, membrane flux is stablized greatly, and the interior membrane flux of unit surface is nanofiltration, reverse osmosis 5～10 times; (4) producing water ratio is high, and because membrane module is immersion through technologic improvement, its contamination resistance strengthens greatly, does not need back flushing, and blowing period is long, and producing water ratio is greater than 98%; (5) system floor space is little, and because it adopts immersion structure, occupation area of equipment is little, facility compact, and easily automatic control, can operate continuously.
Above-mentioned waste water is after chemical method and tubular membrane filtration treatment, the recyclable water resources that is greater than 98%, reclaim water quality reach completely and be better than country about " urban sewage reutilization industry water standard " (GB/T19923-2005), " urban sewage reutilization city miscellaneous water water quality " (GB/T18920-2002) standard, can direct reuse do to produce that bath water, plant area's greening, fire-fighting supplement water, cooling tower supplements water etc.; Mud after concentrated is nontoxic, harmless, easily processes; And treatment system flow process is short, it is little to take up an area, energy consumption is low, easily is automated control, system operation is more reliable, and working cost is lower.Really realize sewage, waste water reclaiming, increase available water resources, be conducive to realize waste water innoxious, the anti-pollution of harnessing the river.
Accompanying drawing explanation
Fig. 1 is the schema of electroplating effluent treatment method of the present invention.
Fig. 2 is the structural representation of electroplating waste processing equipment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further.
In the present embodiment, adopt the electroplating wastewater in certain semiconductor company's packaging process, waste water quality is as shown in table 2, has highly filled, high organic content, containing the feature of heavy metal ion.
As shown in Figure 1 in technical process, the collecting tank in workshop is collected factory effluent, utilize water pump waste water to be squeezed into the processing tank of the immersion type tubular membrane treatment appts of improvement, in transport pipeline, add sodium hydroxide or potassium hydroxide, through centrifugal lift pump, stir and make it fully react the water-fast precipitation of hydroxide of generation, then reacted water conservancy is filtered with the immersion type tubular membrane treatment appts of improvement, the water of process membrane filtration gets final product direct reuse.
The immersion type tubular membrane separation plant that immersion type tubular membrane filter unit adopts Wuxi Ningyang Environmental Science & Technology Co., Ltd. to manufacture and design, its structural representation is shown in Fig. 2.This equipment processing film used is immersion type tubular PE film, its pore size filter is 0.1 μ m, working pressure is less than 20KPa, tubular membrane runner 10mm～25mm, can effectively remove suspended substance and most organic impurity in above-mentioned waste water, above-mentioned waste water is listed in table 2 in the water quality of water outlet after immersion type tubular membrane filter unit filters.
The water quality of the above-mentioned packaged battery waste electroplating of table 2 and water outlet
As shown in Figure 2, above-mentioned electroplating wastewater pending in production plant collecting tank 1 is pumped in the processing pond 5 of immersion type tubular membrane treatment appts, in transport pipe 2, add sodium hydroxide or potassium hydroxide, the concentration of heavy metal ion that its addition gives off according to workshop adds, because workshop collecting tank waste discharge concentration is fixed, therefore addition is fixed, after centrifugal lift pump 3 is uniformly mixed, heavy metal ion and hydroxide radical react, generate water-fast solid particulate, then enter and process in pond 5, in processing pond 5, filter element is installed, filter element is the tubular membrane filter assemblies 10 being immersed in waste water.The tubular filter unit 9 of the interior device series of parallel of membrane filtration module 10, each tubular filter unit 9 outer is with an open type framework, framework face upper sealing device tubular filter film, on framework, there is rising pipe 11,12 is total rising pipe of membrane filtration module 10, and the water outlet of itself and each tubular membrane filtering unit 9 is connected by framework.
Aeration tube 6 with solarization air cap is installed below membrane filtration module 10, and aeration tube 6 is connected with the pressure gas of gas blower 4 output terminals, forms aerating apparatus.Utilize a large amount of bubbles that aerating apparatus produces in processing pond 5, to cause that the air water of rising flows, the shearing force of utilizing its air water stream to rise is washed away the filtration dirt in filter membrane surface, to maintain the stable filtering membrane flux of filtering membrane, owing to adopting tubular membrane, filter, the obstruction possibility of filtering membrane is low, therefore do not need back flushing.
7 blow-off lines for the concentrated sewage after filtering, utilize the way press filtration of press filtration to become landfill after mud cake after discharge.The filtration effluent adopting suction filtration of each membrane filtration module 10, by self-priming water pump 8, by total rising pipe 12, be connected with the rising pipe 11 of membrane filtration module 10, the water of extracting out analyzes 13 through online water analysis instrument, qualified water outlet direct reuse, and underproof water is got back to and is processed re-treatment in pond.
Certain specialized plating company, at the surface electrical copper facing of different substrate materials, nickel, zinc, tin etc., the water quality of its electroplating wastewater after entering collecting tank is listed in table 3.Waste water in collecting tank is pumped into immersion type tubular membrane treatment appts to be processed, in pipeline before access to plant, add sodium hydroxide, waste water after centrifugal lift pump is uniformly mixed enters immersion type tubular membrane treatment appts, in device, utilize tubular membrane component to filter, effluent quality after filtration can direct reuse, and its water quality refers to table 3.
The water quality of water outlet after the above-mentioned electroplating wastewater of table 3 and processing
The above is only the preferred embodiment of the present invention, is appreciated that those skilled in the art without departing from the spirit and concept in the present invention, can make oher improvements and changes.
Claims (10)
1. a treatment process for trade effluent, is characterized in that comprising the following steps:
Trade effluent utilizes the collecting tank in workshop to collect;
Utilize centrifugal lift pump that described trade effluent is squeezed into the processing pond with the industrial waste water disposal device of tubular membrane filter assemblies, in transport pipe, add sodium hydroxide or potassium hydroxide, through centrifugal lift pump, stir and make it fully react the water-fast precipitation of hydroxide of generation;
To with the industrial waste water disposal device with tubular membrane filter assemblies, filter through reacted water conservancy, the water of process membrane filtration gets final product direct reuse.
2. by the treatment process of trade effluent described in claim 1, it is characterized in that: described trade effluent is the Cleaning Wastewater that contains heavy metal ion producing while cleaning plating piece in the productions such as semiconductor packages, plating, electroless plating.
3. by the treatment process of trade effluent described in claim 2, it is characterized in that: described in contain heavy metal ion Cleaning Wastewater be metal ion valence state for+2 or+3 waste water.
4. by the treatment process of trade effluent described in claim 2, it is characterized in that: described in contain heavy metal ion Cleaning Wastewater be the waste water containing metal ions such as Cr, Sn, Pb, Cu, Ni, Ti, Zn, Al.
5. the treatment unit of a trade effluent, it comprises the collecting tank (1) being linked in sequence, transport pipe (2) and membrane filter appts, lift pump (3) is housed on transport pipe (2), described membrane filter appts comprises processes pond (5), process immersion system in pond (5) and have membrane filtration module (10), process below, pond (5) and be provided with blow-off line (7), it is characterized in that: described membrane filtration module (10) consists of tubular membrane filtering unit (9), outside described tubular membrane filtering unit (9), be with an open type framework, framework face upper sealing device tubular filter film, on framework, there are a plurality of rising pipes (11).
6. by the treatment unit of trade effluent described in claim 5, it is characterized in that: the material of described tubular membrane filtering unit (9) is pottery or PE.
7. by the treatment unit of trade effluent described in claim 5, it is characterized in that: described each tubular membrane filtering unit (9) is parallel to each other.
8. by the treatment unit of trade effluent described in claim 5, it is characterized in that: described each rising pipe (11) is connected and forms total rising pipe (12), and total rising pipe (12) is connected with self-priming water pump (8).
9. by the treatment unit of trade effluent described in claim 8, it is characterized in that: Water Test Kits (13) is installed on described total rising pipe (12).
10. by the treatment unit of trade effluent described in claim 5, it is characterized in that: in the processing pond (5) of described membrane filtration module (10) below, aeration tube (6) is installed, aeration tube (6) is connected with the output terminal of gas blower (4).
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| CN201310522338.9A CN103523864A (en) | 2013-10-29 | 2013-10-29 | Industrial wastewater treatment method and device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105906103A (en) * | 2016-06-13 | 2016-08-31 | 台州市神州电热电器厂 | Recovery process for electroplating wastewater |
| CN107963789A (en) * | 2017-12-29 | 2018-04-27 | 山东泰禾环保科技股份有限公司 | Electroplating wastewater zero treatment process and its device |
| CN113391554A (en) * | 2021-06-16 | 2021-09-14 | 周节 | Electroplating method based on artificial intelligence |
-
2013
- 2013-10-29 CN CN201310522338.9A patent/CN103523864A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105906103A (en) * | 2016-06-13 | 2016-08-31 | 台州市神州电热电器厂 | Recovery process for electroplating wastewater |
| CN107963789A (en) * | 2017-12-29 | 2018-04-27 | 山东泰禾环保科技股份有限公司 | Electroplating wastewater zero treatment process and its device |
| CN113391554A (en) * | 2021-06-16 | 2021-09-14 | 周节 | Electroplating method based on artificial intelligence |
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Application publication date: 20140122 |