CN1869289B - Zero drainage circulation ultilization process and equipment of electroplate waste water - Google Patents
Zero drainage circulation ultilization process and equipment of electroplate waste water Download PDFInfo
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- CN1869289B CN1869289B CN2005100436685A CN200510043668A CN1869289B CN 1869289 B CN1869289 B CN 1869289B CN 2005100436685 A CN2005100436685 A CN 2005100436685A CN 200510043668 A CN200510043668 A CN 200510043668A CN 1869289 B CN1869289 B CN 1869289B
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Abstract
The invention relates to electroplating waste water zero discharging recycling technology that includes the following steps: pre-treating to the electroplating waste water; separating the heavy metal; vaporizing and condensing to make the liquid achieve the thickness needed by electroplating. The device includes collecting groove, pre-treating component and evaporator. The invention could realize the zero discharging of heavy metal and have saving and environment protecting effects.
Description
Technical field
The present invention relates to the processing of electroplating wastewater, specifically be meant by membrane separating is concentrated to combine, thereby reclaim and the recycle heavy metal wherein and the technology and the equipment of water realization heavy metal zero release with evaporation concentration.
Background technology
In plating production process, can discharge a considerable amount of poaching wastewaters.Sometimes owing to the discarded and run, drip, leak reason of bath filter, plating bath, may discharge the higher electroplate liquid of some concentration.Contain multiple harmful or deleterious material in these waste water or the electroplate liquid, modal have chromium, nickel, copper, zinc, a hydrogen etc.Also contain tin, cadmium, gold and silver, phosphate radical, fluorochemical and various organism etc. in the waste water of some plating shop and the electroplate liquid.The existence form of these materials is not quite similar, states such as simple yin, yang ionic condition and complexing, and some organism also can exist with molecularity, and for example top grade etc. is produced in oils, asccharin, benzylidene-acetone and decomposition thereof.These harmful or deleterious material directly dischargings as not administered will cause serious pollution to environment, the existence of serious harm biology.Therefore, need carry out suitable processing to electroplating wastewater, to reach national specified discharge standard.
Traditional electroplating waste water treatment technology is for removing useless discharging, this is most widely used treatment technology, promptly utilize chemistry, electrochemical method changes into toxic substance nontoxic or endanger less material or be converted into water-fast compound, utilize inclined-plate clarifying basin to carry out solid-liquid separation then, clear liquid meets the emission standard of trade effluent and can outwards discharge.The shortcoming of this method is: one, and floor space is big, investment is big; Two, what still contain trace in the liquid effluent deposits big heavy metal with compound form, is easily sucked, accumulates by animalcule, plant, and in the food chain mode mankind are produced detrimentally affect; Three, produced the mud that contains heavy metal in a large number, be difficult for handling, cause secondary pollution, also cause the waste of heavy metal and water simultaneously.
Another kind method is a concentrating and separating, adopts methods such as evaporation concentration, ion-exchange, reverse osmosis, electrodialysis, solvent extraction, makes the harmful or toxic substance concentrating and separating under the situation that does not change its chemical form in the waste water, directly or indirectly is used then.These methods all have many different problems, as processing cost height, processing requirement complexity, highly energy-consuming etc.
Summary of the invention
Its main purpose of the present invention is to overcome the problems of existing electroplating effluent treatment method, thereby provides that a kind of floor space is little, heavy metal zero release, heavy metal and all recyclable electroplating wastewater zero utilization process and the equipment of electroplating and consuming energy low that is re-used in of water.
The present invention adopts following technical scheme:
The electroplating wastewater zero utilization process comprises: 1) pre-treatment, and the electroplating wastewater that the electroplate rinsing groove is produced carries out the pre-treatment separation, holds back the organism and the suspended substance of small molecular weight; 2) separating beavy metal uses membrane module that the pretreated liquid that sees through is separated, and it is further concentrated to carry out that its concentrated solution that contains heavy metal is delivered to vaporizer, and it sees through liquid and is recycled to the recycling of electroplate rinsing groove; 3) evaporation concentration does further to concentrate to the concentrated solution of membrane module by vaporizer, reach to electroplate to be recycled in the coating bath after the required concentration to reuse.
Aforementioned electroplating wastewater zero utilization process further comprises: use membrane module that the pretreated liquid that sees through is carried out recirculation and separates and concentrate, until the limiting performance that reaches membrane module.
Further, control the temperature of this circulation loop, its temperature is remained in the scope of permeable membrane element works better permission.
Aforementioned electroplating wastewater zero utilization process further comprises: by vaporizer the concentrated solution of membrane module is cooked circulating and evaporating and concentrate, reach desired concn until concentrated solution and be delivered in the coating bath and reuse.
Electroplating wastewater zero recycle equipment comprises: receiving tank, be connected with the electroplate rinsing groove by upflow tube, and be used to collect the electroplating wastewater that the electroplate rinsing groove produces; Pre-processing assembly, its inlet is connected with receiving tank by pipeline, is provided with topping-up pump in this pipeline, and this pre-processing assembly is used for the electroplating wastewater of receiving tank is carried out initial gross separation, holds back the organism and the suspended substance of small molecular weight; Membrane module, its inlet is connected with the liquid outlet that sees through of pre-processing assembly by pipeline, be provided with intermediate water tank and high-pressure pump in this pipeline successively, membrane module separates the pretreated liquid that sees through, its concentrated solution outlet is connected with intermediate water tank by pipeline, form circulation loop, it sees through liquid and exports by pipe connection to the electroplate rinsing groove; Vaporizer, its inlet is connected with intermediate water tank by pipeline, and it exports by pipe connection to coating bath.
Aforementioned electroplating wastewater zero recycle equipment, further comprise: the pipeline between vaporizer and the intermediate water tank is provided with second intermediate water tank, form a circulation line between this second intermediate water tank and the vaporizer, the pipeline between vaporizer and the coating bath is provided with the magnetic valve of control pipeline break-make.
Further, be provided with concentration meter in the described intermediate water tank, the pipeline between the intermediate water tank and second intermediate water tank is provided with the magnetic valve that is subjected to this concentration meter control.
Aforementioned electroplating wastewater zero recycle equipment, further comprise: intermediate water tank is provided with the refrigeration cycle pipeline, this refrigeration cycle pipeline is provided with cooling system, circulation line between described intermediate water tank and the membrane module is provided with temperature sensor, and aforementioned refrigeration cycle pipeline is provided with the magnetic valve that is subjected to this temperature sensor control.
Aforementioned electroplating wastewater zero recycle equipment, described pre-processing assembly is the series combination of active carbon filtration assembly, micro-filtration membrane module, hyperfiltration membrane assembly.
In sum as can be seen, the present invention creatively combines up-to-date membrane separation technique and traditional vaporizer, gives full play to its advantage separately, apply in the recycling of electroplating wastewater, the heavy metal and the water that can reclaim in the electroplating wastewater are recycled and reused for electroplating technology, realize the zero release of heavy metal, have played the effect of saving, environmental protection, simultaneously, overcome the shortcoming of conventional evaporator highly energy-consuming again, and occupation area of equipment of the present invention is little, simple in structure, invest little.
Description of drawings
Fig. 1 is a system construction drawing of the present invention.
Specific embodiment
Below with reference to Fig. 1 a specific embodiment of the present invention is described.
This electroplating wastewater zero recycle equipment, primary structure comprises receiving tank 3, pre-processing assembly 5, membrane module 7, vaporizer 11.Receiving tank 3 is connected with electroplate rinsing groove 2 by upflow tube 15, is used to collect the electroplating wastewater that electroplate rinsing groove 2 produces.The inlet of pre-processing assembly 5 is connected with receiving tank 3 by pipeline, be provided with topping-up pump 4 in this pipeline, this pre-processing assembly 5 is the series combination of active carbon filtration assembly, micro-filtration membrane module, hyperfiltration membrane assembly, be used for the electroplating wastewater of receiving tank 3 is carried out initial gross separation, hold back the organism and the suspended substance of small molecular weight.The inlet of membrane module 7 is connected with the liquid outlet that sees through of pre-processing assembly 5 by pipeline, is provided with intermediate water tank 57 and high-pressure pump 6 in this pipeline successively, and high-pressure pump 6 provides membrane module required pressure, and intermediate water tank 57 is stored the liquid that sees through of pre-processing assemblies.The liquid that sees through of 7 pairs of pre-processing assemblies 5 of membrane module separates, and its concentrated solution outlet is connected with intermediate water tank 57 by pipeline, forms circulation loop, and it is connected with an elevated tank 19 by pipeline through the liquid outlet, and this elevated tank 19 is connected to electroplate rinsing groove 2.
The inlet of vaporizer 11 is connected with intermediate water tank 57 by pipeline, and it exports by pipe connection to coating bath 1.Pipeline between vaporizer 11 and the intermediate water tank 57 is provided with second intermediate water tank 9, form a circulation line between this second intermediate water tank 9 and the vaporizer 11, be provided with topping-up pump 10 between second intermediate water tank 9 and the vaporizer 11, required pressure is provided, and the pipeline between vaporizer 11 and the coating bath 1 is provided with the magnetic valve 18 of control pipeline break-make.
The technical process of above-mentioned electroplating wastewater zero recycle equipment is as follows:
The first step, pre-treatment.The workpiece that comes out from coating bath 1 enters rinse tank 2 as shown in Figure 1 from left to right, and rinse water enter rinse tank 2 from right to left, thereby workpiece is carried out rinsing, the electroplating wastewater that produces flows into receiving tank 3 by upflow tube, the electroplating wastewater of collecting in the receiving tank 3 is through topping-up pump 4 superchargings, separate to pre-processing assembly 5, isolate the organism and the suspended substance of small molecular weight wherein.
Second step, separating beavy metal.The liquid that sees through of pre-processing assembly 5 pressurizes through high-pressure pump 6, further separate to membrane module 7, its concentrated solution by circulation line to intermediate water tank 57, so continuous recirculation, if the concentrated solution concentration that concentration meter 13 detects in this circulation line reaches preset value, then open magnetic valve 17, the concentrated solution in the intermediate water tank 57 is transported to second intermediate water tank 9 under the effect of topping-up pump 8.If the temperature that temperature sensor 14 detects to the circulation line reaches preset value, then control magnetic valve 16 and open, cool off by the concentrated solution in the water tanks 57 in the middle of 12 pairs of the cooling systems, working under normal temperature to guarantee membrane module 7.
The 3rd step, evaporation concentration.Concentrated solution in second intermediate water tank 9 is transported to vaporizer 11 and carries out evaporation concentration under the effect of topping-up pump 10, this evaporation concentration is undertaken by circulation line circulation, when concentrating the multiple that reaches default, magnetic valve 18 is opened, and concentrated solution is transported to recycling in the coating bath 1.
Also be provided with many general controls parts in the equipment of present embodiment, as the fluid level controller of each water tank, the high pressure control transmitter of each topping-up pump, high-pressure pump etc., these are common technique, are not emphasis of the present invention, no longer describe in detail at this.
Above-mentioned only is a specific embodiment of the present invention; but design concept of the present invention is not limited thereto; and mainly be to concentrate and the evaporation concentration recycling electroplating wastewater that combines by membrane sepn; allly utilize this design that the present invention is carried out the change of unsubstantiality, all should belong to the behavior of invading protection domain of the present invention.
Claims (9)
1. electroplating wastewater zero utilization process comprises:
1) pre-treatment, the electroplating wastewater that the electroplate rinsing groove is produced carries out the pre-treatment separation, holds back the organism and the suspended substance of small molecular weight;
2) separating beavy metal, use membrane module that the pretreated liquid that sees through is separated, the inlet of membrane module is connected with the liquid outlet that sees through of pre-processing assembly by pipeline, be provided with intermediate water tank and high-pressure pump in this pipeline successively, membrane module separates the pretreated liquid that sees through, the concentrated solution outlet of membrane module is connected with intermediate water tank by pipeline, forms circulation loop, and the liquid that sees through of membrane module exports by pipe connection to the electroplate rinsing groove; The concentrated solution that contains heavy metal is delivered to vaporizer through intermediate water tank and further concentrates carrying out, and it sees through liquid and is recycled to the recycling of electroplate rinsing groove;
3) evaporation concentration does further to concentrate to the concentrated solution of membrane module by vaporizer, reach to electroplate to be recycled in the coating bath after the required concentration to reuse.
2. electroplating wastewater zero utilization process as claimed in claim 1 further comprises: use membrane module that the pretreated liquid that sees through is carried out recirculation and separates and concentrate, until the limiting performance that reaches membrane module.
3. electroplating wastewater zero utilization process as claimed in claim 2 further comprises: control the temperature of this circulation loop, its temperature is remained in the scope of permeable membrane element works better permission.
4. electroplating wastewater zero utilization process as claimed in claim 1 further comprises: by vaporizer the concentrated solution of membrane module is cooked circulating and evaporating and concentrate, reach desired concn until concentrated solution and be delivered in the coating bath and reuse.
5. electroplating wastewater zero recycle equipment comprises:
Receiving tank is connected with the electroplate rinsing groove by upflow tube, is used to collect the electroplating wastewater that the electroplate rinsing groove produces;
Pre-processing assembly, its inlet is connected with receiving tank by pipeline, is provided with topping-up pump in this pipeline, and this pre-processing assembly is used for the electroplating wastewater of receiving tank is carried out initial gross separation, holds back the organism and the suspended substance of small molecular weight;
Membrane module, its inlet is connected with the liquid outlet that sees through of pre-processing assembly by pipeline, be provided with intermediate water tank and high-pressure pump in this pipeline successively, membrane module separates the pretreated liquid that sees through, its concentrated solution outlet is connected with intermediate water tank by pipeline, form circulation loop, it sees through liquid and exports by pipe connection to the electroplate rinsing groove;
Vaporizer, its inlet is connected with intermediate water tank by pipeline, and it exports by pipe connection to coating bath.
6. electroplating wastewater zero recycle equipment as claimed in claim 5, further comprise: the pipeline between vaporizer and the intermediate water tank is provided with second intermediate water tank, form a circulation line between this second intermediate water tank and the vaporizer, the pipeline between vaporizer and the coating bath is provided with the magnetic valve of control pipeline break-make.
7. electroplating wastewater zero recycle equipment as claimed in claim 6 further comprises: be provided with concentration meter in the described intermediate water tank, the pipeline between the intermediate water tank and second intermediate water tank is provided with the magnetic valve that is subjected to this concentration meter control.
8. electroplating wastewater zero recycle equipment as claimed in claim 5, further comprise: intermediate water tank is provided with the refrigeration cycle pipeline, this refrigeration cycle pipeline is provided with cooling system, circulation line between described intermediate water tank and the membrane module is provided with temperature sensor, and aforementioned refrigeration cycle pipeline is provided with the magnetic valve that is subjected to this temperature sensor control.
9. electroplating wastewater zero recycle equipment as claimed in claim 5, described pre-processing assembly is the series combination of active carbon filtration assembly, micro-filtration membrane module, hyperfiltration membrane assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005100436685A CN1869289B (en) | 2005-05-26 | 2005-05-26 | Zero drainage circulation ultilization process and equipment of electroplate waste water |
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| CN2005100436685A CN1869289B (en) | 2005-05-26 | 2005-05-26 | Zero drainage circulation ultilization process and equipment of electroplate waste water |
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| CN1869289A CN1869289A (en) | 2006-11-29 |
| CN1869289B true CN1869289B (en) | 2011-06-29 |
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| CN2005100436685A Expired - Fee Related CN1869289B (en) | 2005-05-26 | 2005-05-26 | Zero drainage circulation ultilization process and equipment of electroplate waste water |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101906653B (en) * | 2010-07-29 | 2012-06-06 | 温州市工业科学研究院 | Internal-circulating plating technology and special combined equipment |
| CN103060884B (en) * | 2013-01-14 | 2016-06-01 | 无锡市星亿涂装环保设备有限公司 | A kind of hard chrome plating production line chromic acid circulation and stress treatment system and technique |
| CN103539276A (en) * | 2013-06-03 | 2014-01-29 | 广州凯膜过滤设备有限公司 | System and technology for realizing electroplating washing zero discharge and electroplating solution recovery |
| CN104711657A (en) * | 2015-03-10 | 2015-06-17 | 宁波恺谱瑞膜科技有限公司 | Secondary filtration method of ultra-filtration membrane for electroplate liquid |
| CN106007045A (en) * | 2016-08-09 | 2016-10-12 | 成都虹华环保科技股份有限公司 | Device and method for recovering acid in hydrometallurgy waste water |
| CN106215707A (en) * | 2016-08-31 | 2016-12-14 | 上海交通大学 | Improve the short-cut method of tin plating poaching wastewater online resource embrane method closed-system performance |
| CN106277523A (en) * | 2016-08-31 | 2017-01-04 | 上海交通大学 | Improve the short-cut method of cadmium plating poaching wastewater online resource embrane method closed-system efficiency |
| CN111455444A (en) * | 2020-03-24 | 2020-07-28 | 南京工业大学 | Treatment device and method for fully recycling electroplating rinse water |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3973987A (en) * | 1974-03-18 | 1976-08-10 | Data General Corporation | Water recycle treatment system for use in metal processing |
| US6162361A (en) * | 1996-02-14 | 2000-12-19 | Adiga; Mahabala R. | Plating waste water treatment and metals recovery system |
| DE19925471A1 (en) * | 1999-06-03 | 2001-01-04 | Guenter Barfknecht | Treatment of waste water from an electrolytic bath using reverse osmosis and selective ion-exchange to allow metal recovery |
| JP2003001200A (en) * | 2001-06-20 | 2003-01-07 | Tdk Corp | Method and unit for processing plated part washing water |
| CN1590322A (en) * | 2003-09-05 | 2005-03-09 | 国家海洋局杭州水处理技术研究开发中心 | Membrane separation method of zero discharge of electroplating waste water treatment |
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2005
- 2005-05-26 CN CN2005100436685A patent/CN1869289B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3973987A (en) * | 1974-03-18 | 1976-08-10 | Data General Corporation | Water recycle treatment system for use in metal processing |
| US6162361A (en) * | 1996-02-14 | 2000-12-19 | Adiga; Mahabala R. | Plating waste water treatment and metals recovery system |
| DE19925471A1 (en) * | 1999-06-03 | 2001-01-04 | Guenter Barfknecht | Treatment of waste water from an electrolytic bath using reverse osmosis and selective ion-exchange to allow metal recovery |
| JP2003001200A (en) * | 2001-06-20 | 2003-01-07 | Tdk Corp | Method and unit for processing plated part washing water |
| CN1590322A (en) * | 2003-09-05 | 2005-03-09 | 国家海洋局杭州水处理技术研究开发中心 | Membrane separation method of zero discharge of electroplating waste water treatment |
Non-Patent Citations (2)
| Title |
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| DE 19925471 A1,全文. |
| JP 2003001200 A,全文. |
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