CN204474468U - A kind of device processing plating mixing water - Google Patents
A kind of device processing plating mixing water Download PDFInfo
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- CN204474468U CN204474468U CN201420775282.8U CN201420775282U CN204474468U CN 204474468 U CN204474468 U CN 204474468U CN 201420775282 U CN201420775282 U CN 201420775282U CN 204474468 U CN204474468 U CN 204474468U
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Abstract
Process a device for plating mixing water, comprising: a water collecting basin, inside is provided with perforated pipe, and this perforated pipe connects an air compressor; Be provided with water collecting basin lift pump in water collecting basin, this water collecting basin lift pump is connected in micro-electrolysis reactor by pipeline; Micro-electrolysis reactor inner bottom part is provided with perforated pipe, and pressurized air passes through perforated pipe aerating regulation; Micro-electrolysis reactor is built with iron carbon filler; Micro-electrolysis reactor top is provided with a return water pipe and connects water collecting basin, and micro-electrolysis reactor top is provided with a pipe connecting and connects coagulation reactor; Be provided with coagulating mechanical stirrer in coagulation reactor, bottom coagulation reactor, connect water extracter by a sludge pump.Device of the present utility model efficiently can remove heavy metal in plating mixing water and organic pollutant simultaneously.
Description
Technical field
The utility model relates to a kind of device processing plating mixing water.
Background technology
Electroplating industry, as one of important basic activity of China, is used widely in the production of numerous areas as the industry such as electronics, light industry, machinery and the product for civilian use.Along with the development of electroplating technology, the chemical agent constantly added in production process, as dispersion agent, complexing agent, thickening material etc., makes heavy metal ion show in the solution good water-soluble and dispersed.So plating production process and flushing process define a kind of organic plating mixing water (its principal pollutant are heavy metal and organic pollutant).This kind of plating mixing water has that water yield fluctuation is large, electroplating wastewater and the unfixed feature of organic waste water water yield ratio.In addition, the complexing agent added and heavy metal ion easily form metal complex, this metal complex not easily reacts with oxyhydroxide and forms throw out, therefore public sewerage treatment system is entered after this kind of waste water conventional processing, occur that not only heavy metal ion is not easily up to standard, and the problem that organic contamination substrate concentration also exceeds standard.
In current known treatment process, common are advanced oxidation pretreatment technology such as CN101591082B to report), in this technology, pretreatment technology adopts iron-carbon micro-electrolysis technology and Fenton oxidation technology to improve the biodegradability of electroplating wastewater, majority of organic pollutants is removed in simultaneous oxidation, for good flow condition is created in follow-up coagulating sedimentation or air supporting and biochemical treatment.This technology, in order to be oxidized organic pollutant, need to add a large amount of medicaments to participate in Fenton reaction, and Fenton reaction produces sludge quantity comparatively greatly, considerably increases running cost; This technology is just for the organic pollutant in waste water, but the removal of heavy metal still needs other treatment process, adds the complicacy of plating mixing water treatment process.
In sum, for the feature of plating mixing water, still need a kind of economic, practical, complex compound interference can be broken, and the treatment process of effective removal heavy metal and organic pollutant.
Utility model content
The purpose of this utility model is to provide a kind of device processing plating mixing water, to improve the defect existed in known technology.
For achieving the above object, the device of the process plating mixing water that the utility model provides, comprising:
One water collecting basin, inside is provided with perforated pipe, and this perforated pipe connects an air compressor;
Be provided with water collecting basin lift pump in water collecting basin, this water collecting basin lift pump is connected in micro-electrolysis reactor by pipeline;
Micro-electrolysis reactor inner bottom part is provided with perforated pipe, and pressurized air passes through perforated pipe aerating regulation;
Micro-electrolysis reactor is built with iron carbon filler;
Micro-electrolysis reactor top is provided with a return water pipe and connects water collecting basin, and micro-electrolysis reactor top is provided with a pipe connecting and connects coagulation reactor;
Be provided with coagulating mechanical stirrer in coagulation reactor, bottom coagulation reactor, connect water extracter by a sludge pump.
In described device, the return water pipe at micro-electrolysis reactor top is provided with back-water valve.
In described device, water collecting basin lift pump, back-water valve are all connected programmable controller with coagulating mechanical stirrer.
The device that the utility model provides, for the treatment of the method for plating mixing water, the steps include:
1) plating mixing water is collected in adjust pH in water collecting basin is 2 ~ 3, be promoted in micro-electrolysis reactor by water collecting basin and carry out micro-electrolysis reaction through iron carbon filler, be back to water collecting basin by micro-electrolysis reactor again, when the hexavalent chromium be circulated in plating mixing water is reduced to trivalent chromic ion, the cycle stage terminates;
2) mixing water after micro-electrolysis reaction enters coagulation reactor, after stirring lower adjusted to ph to 10 ~ 12, and dosing coagulant, coagulant aids and chlorine bleach liquor successively;
3) stop stirring, staticly settle;
4) water quality qualified after, the mud mixture in coagulation reactor dewaters, and outer row behind water outlet adjust pH to 6 ~ 9, mud cake is transported outward.
The beneficial effects of the utility model are:
1) the utility model has broken the complex compound that in plating mixing water, heavy metal ion and complexing agent are formed, and makes process water outlet heavy metal ion reach total nickel≤0.2mg/L, total chromium≤0.1mg/L, sexavalent chrome≤0.05mg/L.
2) the utility model has good removal effect (COD≤300mg/L) to the COD in plating mixing water.
3) the utility model solves the problem of effluent treatment plant limited space, is extremely conducive to the area limited in place and applies.
4) the utility model simplifies treatment scheme, and the sludge quantity simultaneously formed in treating processes is about 60% of traditional technology, greatly saves construction investment and running cost.
5) treating processes of the present utility model is fully automatic operation, and easy to operate, operation stability is high.
Accompanying drawing explanation
Fig. 1 is the utility model treatment process schematic diagram.
Nomenclature in figure:
101 water collecting basins; 102 water collecting basin lift pumps; 103 micro-electrolysis reactors; 104 iron carbon fillers; 105 coagulation reactors; 106 coagulating mechanical stirrers; 107 sludge pumps; 108 water extracters, 109 return water pipes, 110 back-water valves, 111 perforated pipes, 112 pipe connectings.
Embodiment
Below in conjunction with Fig. 1 and embodiment, the utility model is described further.
The utility model is made up of water collecting basin 101, micro-electrolysis reactor 103, coagulation reactor 105 and dehydration pump 108 substantially.Refer to Fig. 1 particularly.
Water collecting basin 101 inside is provided with perforated pipe 111, and this perforated pipe connects a pressurized air; Be provided with water collecting basin lift pump 102 in water collecting basin 101, this water collecting basin lift pump 102 is connected in micro-electrolysis reactor 103 by pipeline, and the bottom in micro-electrolysis reactor 103 is also provided with perforated pipe 111.Pressurized air is by perforated pipe aeration in water collecting basin 101 and micro-electrolysis reactor 103.Micro-electrolysis reactor 103 is built with iron carbon filler 104; this iron carbon filler 104 adopts the integrated catalysis and micro-electrolysis filler of iron-carbon-M, and (this iron carbon filler is existing goods; filler specifications and models are Φ 14-18mm, and building environmental protective chemical industry filler company limited by Pingxiang City honor provides)
Micro-electrolysis reactor 103 top is provided with a return water pipe 109 and connects water collecting basin 101, and return water pipe 109 is provided with back-water valve 110, and micro-electrolysis reactor 103 top is also provided with a pipe connecting 112 and connects coagulation reactor 105.Be provided with coagulating mechanical stirrer 106 in coagulation reactor 105, the bottom of coagulation reactor 105 connects water extracter 108 by a sludge pump 107.
In device of the present utility model, water collecting basin lift pump 102, back-water valve 110 are all connected with coagulating mechanical stirrer 106 and are controlled by programmable controller.
The utility model is based on the application of iron-carbon micro-electrolysis technology and coagulating sedimentation technology, its theoretical foundation is the acting in conjunction of iron-carbon micro-electrolysis based on electrochemistry, oxidation-reduction, physics and flocculation sediment, hexavalent chromium most in plating mixing water is reduced to trivalent chromic ion, be the material of small molecules or easily degraded simultaneously by the organic matter degradation in plating mixing water, break the complex compound that heavy metal ion and complexing agent are formed, the waste water of micro-electrolysis reaction process is after adjust pH, and heavy metal ion forms a large amount of tiny flco, eventually pass follow-up coagulating sedimentation technology, make the colloid in waste water be condensed into flocs unit with tiny flco to be separated from water, thus make process effluent quality reach total nickel≤0.2mg/L, total chromium≤0.1mg/L, sexavalent chrome≤0.05mg/L, be better than the highest permission emission concentration of country " integrated wastewater discharge standard " (GB8978-1996) first kind pollutent, country's " plating pollutant emission standard " (GB21900-2008) newly-built enterprise Sewage Water Emissions limit value and Beijing " water pollutant comprehensive discharge standard " (DB11/307-2013) enter public sewerage treatment system limit value.Concrete limit value is in table 1.
Meanwhile, process water outlet to reach COD≤300mg/L and (be better than country's " integrated wastewater discharge standard " (GB8978-1996) Equations of The Second Kind pollutent the highest permission emission concentration three class standard (COD≤500mg/L); " water pollutant comprehensive discharge standard " (DB11/307-2013) enters public sewerage treatment system limit value (COD≤500mg/L)).
Embodiment
Plating mixing water in certain factory's electroplating production plant comprises electroplating wastewater and organic waste water.Electroplating wastewater is mainly derived from the waste water and flushing waste water that produce in plating worker-house nickel plating, chrome-plating process, and its heavy metal ion mainly contained has Ni
2+, Cr
6+and Cr
3+; Organic waste water derives from cleaning worker-house cleaning process the waste water having added ammonium dichromate solution, complexing agent, thickening material etc. and formed, and its heavy metal ion is mainly containing Cr
6+and Cr
3+.The process water yield of plating mixing water is 20m
3/ d, principal pollutant are heavy metal (nickel, chromium) and organic pollutant (COD), and after process, water outlet enters local sewage work, and raw water quality is in table 2.
Before transformation, plating mixing water adopts traditional removal heavy metal technology, there is problem (" water pollutant comprehensive discharge standard " (DB11/307-2013) enters public sewerage treatment system limit value) not up to standard and that organic pollutant (COD) is not up to standard in the water outlet heavy metal nickel after process, also there is the problem of organic pollutant Severe blockage dehydrator filter cloths a large amount of in water outlet once in a while simultaneously.
Treating processes of the present utility model is divided into cycle stage, fill phase, step of reaction and bleeding stage, wherein:
1) cycle stage: plating mixing water is collected in water collecting basin 101, under PLC controls, be 2 ~ 3 through sulfuric acid adjust pH, be promoted to bottom micro-electrolysis reactor 103 by water collecting basin lift pump 102, after iron carbon filler 104 carries out micro-electrolysis reaction, be back to water collecting basin 101 by the return water pipe 109 at micro-electrolysis reactor 103 top, being so circulated to the cycle stage terminates; The object of cycle stage be make plating mixing water fully with iron carbon filler generation micro-electrolysis reaction, ensure hexavalent chromium most in plating mixing water to be reduced to trivalent chromic ion, while organic pollutant also effectively in degrading waste water.After cycle stage terminates, under PLC controls, close the back-water valve 110 of micro-electrolysis reactor 101 top return water pipe 109.
Under raw water quality condition shown in table 2, the hydraulic detention time in micro-electrolysis reactor is 0.5 ~ 1h, as COD≤1400mg/L, cycling time 0.5 ~ 1h; When COD is at 1400 ~ 2000mg/L, cycling time is 1 ~ 2h.
2) fill phase: the mixing water after microelectrolysis processing continues through water collecting basin lift pump 102 and is promoted to bottom micro-electrolysis reactor 103, after continuing that micro-electrolysis reaction occurs, is entered in coagulation reactor 105 by the pipe connecting 112 at micro-electrolysis reactor 103 top.The water inlet moment terminates, and PLC controls automatic closure set pond lift pump 102, and automatically records water inlet integrated flow F (m
3).
In above-mentioned two steps, water collecting basin 101 compressed air, through perforated pipe 111 aeration agitation, makes the recirculation water after micro-electrolysis reaction and Yuan Shui mix, and gas-water ratio is 1:1.Micro-electrolysis reactor 103 inner bottom part pressurized air perforated pipe 111 aeration, make the waste water of lifting mix with water in micro-electrolysis reactor 103 and provide required oxygen for micro-electrolysis reaction, gas-water ratio is 2:1.
3) step of reaction: under PLC controls, opens coagulating mechanical stirrer 106, behind adjusted to ph to 11 ~ 12, and dosing coagulant, coagulant aids and chlorine bleach liquor successively.The relevant parameter of the chemical feeding quantity defining above-mentioned three kinds of medicaments and raw water quality, the water yield is respectively K
1, K
2and K
3.Coagulating agent is polymerize aluminum chloride, and mass concentration is 5%, and chemical feeding quantity is by parameter K
1(coagulating agent chemical feeding quantity (m
3)=integrated flow F (m
3) × K
1) control; Coagulant aids is anion-polyacrylamide, and mass concentration is 1 ‰, and chemical feeding quantity is by parameter K
2(coagulant aids chemical feeding quantity (m
3)=integrated flow F (m
3) × K
2) control; Chlorine bleach liquor, mass concentration is 10%, and chemical feeding quantity is by parameter K
3(chlorine bleach liquor's chemical feeding quantity (m
3)=integrated flow F (m
3) × K
3) control.After dosing, automatically stop coagulating mechanical stirrer 106, staticly settle.
Under raw water quality condition shown in table 2, parameter K
1range of set value is 0.01 ~ 0.03; Parameter K
2range of set value is 0.005 ~ 0.01; Parameter K
3range of set value is 0.02 ~ 0.03.
4) bleeding stage: after water quality test is qualified, namely the mud mixture in coagulation reactor 105 is squeezed in water extracter 108 by sludge pump 107 and is dewatered, and water outlet is outer row behind persulfuric acid adjust pH to 6 ~ 9, and mud cake is transported outward.
Adopt the effluent quality of the plating mixing water after above-mentioned steps process as shown in table 3.
Table 1 (unit is mg/L)
Table 2: plating mixing water raw water quality table
Table 3: plating mixing water effluent quality
Claims (3)
1. process a device for plating mixing water, it is characterized in that, comprising:
One water collecting basin, inside is provided with perforated pipe, and this perforated pipe connects an air compressor;
Be provided with water collecting basin lift pump in water collecting basin, this water collecting basin lift pump is connected in micro-electrolysis reactor by pipeline;
Micro-electrolysis reactor inner bottom part is provided with perforated pipe, and pressurized air passes through perforated pipe aerating regulation;
Micro-electrolysis reactor is built with iron carbon filler;
Micro-electrolysis reactor top is provided with a return water pipe and connects water collecting basin, and micro-electrolysis reactor top is provided with a pipe connecting and connects coagulation reactor;
Be provided with coagulating mechanical stirrer in coagulation reactor, bottom coagulation reactor, connect water extracter by a sludge pump.
2. device according to claim 1, is characterized in that, the return water pipe at micro-electrolysis reactor top is provided with back-water valve.
3. device according to claim 2, is characterized in that, water collecting basin lift pump, back-water valve are all connected programmable controller with coagulating mechanical stirrer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420775282.8U CN204474468U (en) | 2014-12-10 | 2014-12-10 | A kind of device processing plating mixing water |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420775282.8U CN204474468U (en) | 2014-12-10 | 2014-12-10 | A kind of device processing plating mixing water |
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| Publication Number | Publication Date |
|---|---|
| CN204474468U true CN204474468U (en) | 2015-07-15 |
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ID=53630271
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|---|---|---|---|
| CN201420775282.8U Active CN204474468U (en) | 2014-12-10 | 2014-12-10 | A kind of device processing plating mixing water |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104529017A (en) * | 2014-12-10 | 2015-04-22 | 北京市环境保护科学研究院 | Treatment method and treatment device of electroplating mixed water |
| CN105347582A (en) * | 2015-11-26 | 2016-02-24 | 北京科技大学 | Device and method for degrading alkaline organic waste water by iron-carbon micro-electrolysis |
-
2014
- 2014-12-10 CN CN201420775282.8U patent/CN204474468U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104529017A (en) * | 2014-12-10 | 2015-04-22 | 北京市环境保护科学研究院 | Treatment method and treatment device of electroplating mixed water |
| CN104529017B (en) * | 2014-12-10 | 2016-08-24 | 北京市环境保护科学研究院 | A kind for the treatment of method and apparatus electroplating mixing water |
| CN105347582A (en) * | 2015-11-26 | 2016-02-24 | 北京科技大学 | Device and method for degrading alkaline organic waste water by iron-carbon micro-electrolysis |
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| GR01 | Patent grant |