CN101723532A - System for treating concentrated water produced by coking wastewater recycling process - Google Patents
System for treating concentrated water produced by coking wastewater recycling process Download PDFInfo
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- CN101723532A CN101723532A CN200910200197A CN200910200197A CN101723532A CN 101723532 A CN101723532 A CN 101723532A CN 200910200197 A CN200910200197 A CN 200910200197A CN 200910200197 A CN200910200197 A CN 200910200197A CN 101723532 A CN101723532 A CN 101723532A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 62
- 239000002351 wastewater Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000004939 coking Methods 0.000 title claims abstract description 27
- 238000004064 recycling Methods 0.000 title claims abstract description 19
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 54
- 230000003647 oxidation Effects 0.000 claims abstract description 53
- 239000002893 slag Substances 0.000 claims abstract description 11
- 230000005611 electricity Effects 0.000 claims description 28
- 230000003197 catalytic effect Effects 0.000 claims description 27
- 238000005189 flocculation Methods 0.000 claims description 23
- 230000016615 flocculation Effects 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 6
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 5
- 239000010962 carbon steel Substances 0.000 claims description 5
- 239000003245 coal Substances 0.000 claims description 5
- 150000002118 epoxides Chemical class 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 claims description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 11
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- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000012528 membrane Substances 0.000 abstract description 4
- 238000009297 electrocoagulation Methods 0.000 abstract 2
- 238000005516 engineering process Methods 0.000 description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 239000002894 chemical waste Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
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- 239000000377 silicon dioxide Substances 0.000 description 3
- 239000012267 brine Substances 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
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- 231100001261 hazardous Toxicity 0.000 description 2
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- 238000002161 passivation Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
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- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
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- 238000000108 ultra-filtration Methods 0.000 description 1
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Abstract
The invention relates to a system for treating concentrated water produced by a coking wastewater recycling process, which comprises an electrocoagulation-flotation tank, electrocoagulation electrodes, electrofloatation electrodes, an electrocoagulation-flotation slag scraper, an electrocatalytic oxidation tank with three reaction tanks, electrocatalytic oxidation electrodes and an electrocatalytic oxidation outlet sump. The inside of the electrocoagulation-flotation tank is provided with the electrocoagulation electrodes and the electrofloatation electrodes; the upper part of the electrocoagulation-flotation tank is provided with the electrocoagulation-flotation slag scraper; an inlet of the electrocoagulation-flotation tank is connected with a water inlet pipe of a RO concentrated water pump; and an outlet of the electrocoagulation-flotation tank is connected with the three reaction tanks of the electrocatalytic oxidation tank. The inside of each of the reaction tanks of the electrocatalytic oxidation tank is provided with the electrocatalytic oxidation electrodes; and an outlet of the electrocatalytic oxidation tank is connected with the electrocatalytic oxidation outlet sump. The treatment system has the advantages of steady treatment effect, lower production running cost, and simple and convenient operation, can treat the concentrated water produced by a reverse osmosis membrane, ensure that the effluent meets the requirement of discharge standard, and reduce the influence of the discharge of the concentrated water on the environment.
Description
Technical field
The invention belongs to water treatment field, specifically relate to a kind of treatment system of concentrated water produced by coking wastewater recycling process.
Background technology
The treatment and disposal that embrane method waste water recycling technology produces strong brine is a global difficult problem always, and the dense water that most of industrial effluent reusing technology produces is all taked the method that directly effluxes.The dense glassware for drinking water that coking waste water reuse produces has hazardous contaminant content height, directly effluxes environmentally hazardous shortcoming, and coking waste water reuse produces the selection and the equipment research and development of the treatment technology of strong brine, is the emphasis and the difficult point of coking waste water reuse all the time.
Domestic coking waste water reuse is almost nil to the research and development of the treatment and disposal technology of dense water.As patent documentation 200710068327.2, adopt bio-chemical effluent to prepare process water through oxidizing, flocculating+air supporting+yin, yang ion-exchange+reverse osmosis, the dense water that reverse osmosis produces is individual curing not, directly send quenching; Patent documentation 200810022437.X, adopt the former water of coking chemical waste water after oil removal treatment through multi-medium filtering+security personnel's filtration+first-stage reverse osmosis+two-pass reverse osmosis; The dense water that reverse osmosis produces directly burns.
At present, studying more dense water treatment disposal technology is the evaporative crystallization technology, evaporative crystallization is to adopt external heat source to make solution be become supersaturation and be the process that crystal is separated out by unsaturated, because a large amount of high-temperature steams of this Technology Need consumption, the solubleness of solute, the selection and the manufacturing of equipment there is particular requirement, and because of its disposable cost of investment and running cost are all very high, can not move continuously, therefore be difficult to promote.The processing that produces dense water for coking chemical waste water reverse osmosis reuse technology, tend to use high-level oxidation technology mostly, utilize the redox electro ultrafiltration of strong oxidizer that pollutents such as the CODcr in the waste water, T-CN are separated from waste water, as electrochemical oxidation, ozone oxidation etc.
Summary of the invention
In order to solve above-mentioned existing in prior technology problem, the treatment system that the purpose of this invention is to provide a kind of concentrated water produced by coking wastewater recycling process, adopt this treatment system, treatment effect is stable, the production run cost is lower, and the operation operation is easy, can handle the dense water that reverse osmosis membrane produces, make the requirement of water outlet allow compliance with emission standards, reduce dense water and efflux influence environment.
Technical solution of the present invention is as follows:
A kind of treatment system of concentrated water produced by coking wastewater recycling process comprises electric flocculation-air floating pond, electricity flocculation electrode, electric floating electrode, electric flocculation-air floating slag scraper, the catalytic oxidation pond that has three reactive tanks, electrocatalytic oxidation polarizing electrode and catalytic oxidation outlet sump;
Electricity flocculation electrode and electric floating electrode are set in the described electric flocculation-air floating pond, and its top is provided with electric flocculation-air floating slag scraper, and the import in electric flocculation-air floating pond connects the dense water pump of RO and comes water pipe, and the outlet in electric flocculation-air floating pond connects three reactive tanks in catalytic oxidation pond;
In the reactive tank in described catalytic oxidation pond the electrocatalytic oxidation polarizing electrode is set, the outlet in catalytic oxidation pond connects the catalytic oxidation outlet sump.
The pond body in described electric flocculation-air floating pond is a carbon steel material, in be coated with epoxide coal bituminous protective system.
For being arranged in parallel, be respectively cathode and anode between adjacent electrode plates between the described electricity flocculation electrode, be connected by lead with the cathode and anode of direct supply respectively after battery lead plate at interval interconnects, battery lead plate and current are arranged in the same way.
Described electricity flocculation electrode adopts the board-like electrode of dissolubility Fe/Fe.
Described electric floating electrode comprises anode and negative electrode, and described cathode and anode is hung down by the cross arrangement array configuration and built up the electrode group, adopts netted vertical parallel arrangement architecture, and single group electrode group comprises 6 on anode, area 0.1152m
2, 5 on negative electrode, area 0.096m
2, described cathode and anode distance between plates 2mm, the cathode and anode of every group of electrode group all is provided with 2 wiring board private cable UNICOMs, and all cathode and anode are by being connected in parallel.
Described electric floating electrode adopts insoluble Ti/DSA net formula electrode.
Described electricity flocculation electrode, electric floating electrode adopt silicon rectifier cubicle to make alternating-current become direct current.
The pond body in described catalytic oxidation pond is a carbon steel material, in be coated with epoxide coal bituminous protective system.
Described electrocatalytic oxidation polarizing electrode is made up of several electrode groups, and electrode comprises anode and negative electrode, and described cathode and anode is hung down by the cross arrangement array configuration and built up the electrode group, adopts netted vertical parallel arrangement architecture, and single group electrode group comprises 6 on anode, area 0.1152m
2, 5 on negative electrode, area 0.096m
2, described cathode and anode distance between plates 2mm, the cathode and anode of every group of electrode group all is provided with 2 wiring board private cable UNICOMs, and all cathode and anode adopt and are connected in parallel.
The present invention makes it compared with prior art owing to adopted above technical scheme, has following advantage:
Adopt treatment system of the present invention, treatment effect is stable, and the production run cost is lower, and the operation operation is easy, can handle the dense water that reverse osmosis membrane produces, and makes the requirement of water outlet allow compliance with emission standards, reduces dense water and effluxes influence to environment.
Description of drawings
Accompanying drawing is the synoptic diagram of the treatment system of a kind of concentrated water produced by coking wastewater recycling process of the present invention.
Drawing reference numeral:
1 is electric flocculation-air floating pond, and 2 is electricity flocculation electrode, and 3 is electric floating electrode, and 4 is electric flocculation-air floating slag scraper, and 5 is the catalytic oxidation pond, and 6 is the electrocatalytic oxidation polarizing electrode, and 7 is the catalytic oxidation outlet sump.
Embodiment
Below in conjunction with drawings and Examples the present invention is elaborated.
Referring to accompanying drawing, the present invention is a kind of treatment system of concentrated water produced by coking wastewater recycling process, specifically, be that a kind of coking chemical waste water adopts the embrane method reuse technology to produce the treatment system of dense water, it comprises electric flocculation-air floating pond 1, electricity flocculation electrode 2, electric floating electrode 3, electric flocculation-air floating slag scraper 4, the catalytic oxidation pond 5 that has three reactive tanks, electrocatalytic oxidation polarizing electrode 6 and catalytic oxidation outlet sump 7.
The pond body in electricity flocculation-air floating pond 1 is a carbon steel material, in be coated with epoxide coal bituminous protective system.In the electricity flocculation-air floating pond 1 electricity flocculation electrode 2 and electric floating electrode 3 are set, its top is provided with electric flocculation-air floating slag scraper 4, and complex compound and flocculation scum silica frost pollutent are scraped by electric flocculation-air floating slag scraper 4, realize solid-liquid separation.The import in electricity flocculation-air floating pond 1 connects the dense water pump of RO and comes water pipe, and the outlet in electric flocculation-air floating pond 1 connects three reactive tanks in catalytic oxidation pond 5.
Electrocatalytic oxidation polarizing electrode 6 is set, 10 ℃～20 ℃ of operation temperature rises in the reactive tank in catalytic oxidation pond 5.The outlet in catalytic oxidation pond 5 connects catalytic oxidation outlet sump 7.Feed direct current reaction 60min in the reactive tank in catalytic oxidation pond 5 after, the pollutent in the active oxygen oxidizing water of anode electrolysis water generates is degraded to CO with T-CN, organic pollutant
2, N
2And water, the water outlet flow by gravity is to catalytic oxidation outlet sump 7 back standard discharges.
Electricity flocculates between the electrode 2 for being arranged in parallel, be respectively the cathode and anode relation between adjacent electrode plates, after interconnecting, battery lead plate at interval is connected by lead with the cathode and anode of direct supply respectively, battery lead plate and current are arranged in the same way, can prevent effectively that pollutent from too depositing on battery lead plate, resistance is increased, weaken the treatment effect of electricity flocculation.Electricity flocculation electrode 2 adopts the board-like electrode of dissolubility Fe/Fe.
3 fens anodes of electric floating electrode and negative electrode, described cathode and anode hang down by the cross arrangement array configuration and build up the electrode group, adopt netted vertical parallel arrangement architecture.Single group electrode group comprises 6 on anode, area 0.1152m
2, 5 on negative electrode, area 0.096m
2, described cathode and anode distance between plates 2mm, the cathode and anode of every group of electrode group all is provided with 2 wiring board private cable UNICOMs, and all cathode and anode are by being connected in parallel.In order to guarantee that the electrode group is in best running status constantly, the yin, yang polarity that electrode need be regularly switched in the operation of electrode group is to avoid electrode passivation.Electric floating electrode 3 adopts insoluble Ti/DSA net formula electrode.
Electrocatalytic oxidation polarizing electrode 6 is made up of several electrode groups, and electrode comprises anode and negative electrode, and described cathode and anode is hung down by the cross arrangement array configuration and built up the electrode group, adopts netted vertical parallel arrangement architecture.Single group electrode is base material with Ti, and the surface is coated with metal oxide containing precious metals (platinum, ruthenium, iridium, rare earth cerium etc.) as catalyzer, can be corrosion-resistant and have an excellent chemical stability.Single group electrode group comprises 6 on anode, area 0.1152m
2, 5 on negative electrode, area 0.096m
2, described cathode and anode distance between plates 2mm, the cathode and anode of every group of electrode group all is provided with 2 wiring board private cable UNICOMs, and all cathode and anode adopt and are connected in parallel.In order to guarantee that the electrode group is in best running status constantly, the yin, yang polarity that electrode need be regularly switched in the operation of electrode group is to avoid electrode passivation.
Treatment process adopts electric flocculation-air floating, is combined device, has realized that electric flocculation and electricity are pneumatically supported collaborative, can effectively reduce the consumption of insoluble electrode and improve treatment effect, and electricity flocculation and electric floating electrode are set respectively in the body of pond.
The principle of electricity flocculation is that the yin, yang electrode is set in water, and after feeding low-voltage DC at normal temperatures and pressures, electricity flocculation anode produces polyvalent metal ion such as Fe
2+, catholyte H
2O produces pollutent generation oxidation, flocculation reactions such as T-CN, COD in OH etc. and the waste water and oil content, possesses decolorizing effect simultaneously.This process is irreversible, needs the periodic replacement electrode.
The pneumatically supported principle of electricity is that the yin, yang electrode is set in water, after feeding low-voltage DC at normal temperatures and pressures, promptly produces microbubble on the electrode, and the coagulation effect that produces electrolysis simultaneously makes the waste water Fe that flocculation forms through electricity
2(Fe (CN))
6Complex compound and pollutent such as flocculation scum silica frost etc., under the acting in conjunction of multiple power such as interfacial tension, bubble rising buoyancy and hydrostaticpressure difference, adhered to by micro bubble and on float to liquid level, scrape by electric flocculation-air floating slag scraper again, realize the effect of solid-liquid separation.Electric air floating trough divides two-layer up and down, and the upper strata is disengaging zone and scum silica frost stable region, and lower floor is the catchment area.The electrolysis utmost point is positioned at central authorities of air flotation slot lower floor, and the air supporting water-out manners is the overflow water outlet.The electricity flocculation-air floating need not add chemical agent, can make in the waste water pollutent generation Coagulation and Adsorption reactions such as T-CN, oil content of part, is adhered to and removes by microbubble.
Treatment process adopts catalytic oxidation, and catalytic oxidation is the process of anode generation oxidation, is divided into two kinds of direct and indirect catalyzed oxidations.Directly catalyzed oxidation is that pollutent directly loses electronics and the reaction of oxidation takes place at anode, can be divided into electro-chemical conversion and electrochemical combustion again: electro-chemical conversion promptly changes the part toxic substance in the waste water into non-toxic substance, or not biodegradable organism is converted into has biodegradable organism (as the acidication reaction takes place), to improve the biodegradability of waste water, further carry out the biochemical treatment of waste water; Electrochemical combustion then is to be CO with the organism direct oxidation
2Process.
The present invention controls electrocatalysis oxidation reaction and is in the electrochemical combustion stage, is CO with contaminant degradations such as T-CN, organism directly
2, N
2And water.Hydraulic detention time is 60min.
Treatment system of the present invention is applicable to Treatment of Coking Effluent, and data see the following form before and after handling.
Data sheet before and after the dense water treatment that coking wastewater recycling process produces
| Project | Specific conductivity (μ S/cm) | ??CODcr??(mg/l) | ??T-CN??(mg??/l) | ??SS??(mg??/l) | ??F -??(mg/l) | ??NO 3 -??(mg/l??) |
| Reverse osmosis concentrated water | ??≤24000 | ??≤600 | ??≤12 | ??≤8 | ??≤240 | ??≤600 |
| The water outlet of electricity flocculation-air floating | ??≤20000 | ??≤300 | ??≤5 | ??≤1 | ??≤120 | ??≤500 |
| The catalytic oxidation water outlet | ??≤18000 | ??≤60 | ??≤0.3 | ??≤1 | ??≤10 | ??≤450 |
In summary, adopt treatment system of the present invention, treatment effect is stable, and the production run cost is lower, and the operation operation is easy, can handle the dense water that reverse osmosis membrane produces, and makes the requirement of water outlet allow compliance with emission standards, reduces dense water and effluxes influence to environment.
Certainly, those skilled in the art in the present technique field will be appreciated that, the foregoing description only is to be used for illustrating the present invention, and be not as limitation of the invention, as long as in connotation scope of the present invention, all will drop in the scope of claim of the present invention conversion, the modification of the foregoing description.
Claims (9)
1. the treatment system of a concentrated water produced by coking wastewater recycling process, it is characterized in that, comprise electric flocculation-air floating pond, electricity flocculation electrode, electric floating electrode, electric flocculation-air floating slag scraper, the catalytic oxidation pond that has three reactive tanks, electrocatalytic oxidation polarizing electrode and catalytic oxidation outlet sump;
Electricity flocculation electrode and electric floating electrode are set in the described electric flocculation-air floating pond, and its top is provided with electric flocculation-air floating slag scraper, and the import in electric flocculation-air floating pond connects the dense water pump of RO and comes water pipe, and the outlet in electric flocculation-air floating pond connects three reactive tanks in catalytic oxidation pond;
In the reactive tank in described catalytic oxidation pond the electrocatalytic oxidation polarizing electrode is set, the outlet in catalytic oxidation pond connects the catalytic oxidation outlet sump.
2. the treatment system of concentrated water produced by coking wastewater recycling process according to claim 1 is characterized in that, the pond body in described electric flocculation-air floating pond is a carbon steel material, in be coated with epoxide coal bituminous protective system.
3. the treatment system of concentrated water produced by coking wastewater recycling process according to claim 1, it is characterized in that, described electricity flocculates between the electrode for being arranged in parallel, be respectively cathode and anode between adjacent electrode plates, be connected by lead with the cathode and anode of direct supply respectively after battery lead plate at interval interconnects, battery lead plate and current are arranged in the same way.
4. according to the treatment system of claim 1 or 3 described concentrated water produced by coking wastewater recycling process, it is characterized in that described electricity flocculation electrode adopts the board-like electrode of dissolubility Fe/Fe.
5. the treatment system of concentrated water produced by coking wastewater recycling process according to claim 1, it is characterized in that, described electric floating electrode comprises anode and negative electrode, described cathode and anode is hung down by the cross arrangement array configuration and is built up the electrode group, adopt netted vertical parallel arrangement architecture, single group electrode group comprises 6 on anode, area 0.1152m
2, 5 on negative electrode, area 0.096m
2, described cathode and anode distance between plates 2mm, the cathode and anode of every group of electrode group all is provided with 2 wiring board private cable UNICOMs, and all cathode and anode are by being connected in parallel.
6. the treatment system of concentrated water produced by coking wastewater recycling process according to claim 1 or 5 is characterized in that described electric floating electrode adopts insoluble Ti/DSA net formula electrode.
7. the treatment system of concentrated water produced by coking wastewater recycling process according to claim 1 is characterized in that, described electricity flocculation electrode, electric floating electrode adopt silicon rectifier cubicle to make alternating-current become direct current.
8. the treatment system of concentrated water produced by coking wastewater recycling process according to claim 1 is characterized in that, the pond body in described catalytic oxidation pond is a carbon steel material, in be coated with epoxide coal bituminous protective system.
9. the treatment system of concentrated water produced by coking wastewater recycling process according to claim 1, it is characterized in that, described electrocatalytic oxidation polarizing electrode is made up of several electrode groups, electrode comprises anode and negative electrode, described cathode and anode is hung down by the cross arrangement array configuration and is built up the electrode group, adopt netted vertical parallel arrangement architecture, single group electrode group comprises 6 on anode, area 0.1152m
2, 5 on negative electrode, area 0.096m
2, described cathode and anode distance between plates 2mm, the cathode and anode of every group of electrode group all is provided with 2 wiring board private cable UNICOMs, and all cathode and anode adopt and are connected in parallel.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013078639A1 (en) * | 2011-11-30 | 2013-06-06 | Rohm And Haas Company | Coking wastewater treatment |
| CN104556497A (en) * | 2014-12-12 | 2015-04-29 | 中国矿业大学(北京) | Method and device for removing organic pollutants in lignite upgrading condensed water |
| CN105540947A (en) * | 2015-12-18 | 2016-05-04 | 北京伟创力科技有限公司 | Method and system for processing drilling wastewater |
| CN106630312A (en) * | 2016-12-16 | 2017-05-10 | 北京大学包头创新研究院 | Coking phenol-cyanogen wastewater treatment system, treatment method and application |
| CN110510710A (en) * | 2019-08-05 | 2019-11-29 | 陕西省石油化工研究设计院 | Electrocoagulation and electrocatalytic oxidation integrated wastewater treatment device |
| CN113415928A (en) * | 2021-06-29 | 2021-09-21 | 福建安冠环境科技有限公司 | Low-concentration petroleum pollution emergency treatment integrated device |
-
2009
- 2009-12-10 CN CN2009102001972A patent/CN101723532B/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013078639A1 (en) * | 2011-11-30 | 2013-06-06 | Rohm And Haas Company | Coking wastewater treatment |
| CN104556497A (en) * | 2014-12-12 | 2015-04-29 | 中国矿业大学(北京) | Method and device for removing organic pollutants in lignite upgrading condensed water |
| CN105540947A (en) * | 2015-12-18 | 2016-05-04 | 北京伟创力科技有限公司 | Method and system for processing drilling wastewater |
| CN106630312A (en) * | 2016-12-16 | 2017-05-10 | 北京大学包头创新研究院 | Coking phenol-cyanogen wastewater treatment system, treatment method and application |
| CN106630312B (en) * | 2016-12-16 | 2021-07-09 | 北京大学包头创新研究院 | Treatment system, treatment method and application of coking phenol-cyanogen wastewater |
| CN110510710A (en) * | 2019-08-05 | 2019-11-29 | 陕西省石油化工研究设计院 | Electrocoagulation and electrocatalytic oxidation integrated wastewater treatment device |
| CN113415928A (en) * | 2021-06-29 | 2021-09-21 | 福建安冠环境科技有限公司 | Low-concentration petroleum pollution emergency treatment integrated device |
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| Publication number | Publication date |
|---|---|
| CN101723532B (en) | 2012-07-04 |
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