CS203560B1 - Method for the oxidative neutralization of toxical scrape containing nitrites - Google Patents
Method for the oxidative neutralization of toxical scrape containing nitrites Download PDFInfo
- Publication number
- CS203560B1 CS203560B1 CS754478A CS754478A CS203560B1 CS 203560 B1 CS203560 B1 CS 203560B1 CS 754478 A CS754478 A CS 754478A CS 754478 A CS754478 A CS 754478A CS 203560 B1 CS203560 B1 CS 203560B1
- Authority
- CS
- Czechoslovakia
- Prior art keywords
- waste
- toxical
- scrape
- oxidative
- containing nitrites
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 5
- 231100000331 toxic Toxicity 0.000 title claims description 5
- 230000002588 toxic effect Effects 0.000 title claims description 5
- 230000001590 oxidative effect Effects 0.000 title claims description 3
- 150000002826 nitrites Chemical class 0.000 title description 3
- 238000006386 neutralization reaction Methods 0.000 title 1
- 239000002699 waste material Substances 0.000 claims description 15
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 claims description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 3
- 150000001805 chlorine compounds Chemical class 0.000 claims description 2
- 239000000460 chlorine Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 235000010288 sodium nitrite Nutrition 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 239000010891 toxic waste Substances 0.000 description 1
Landscapes
- Water Treatment By Electricity Or Magnetism (AREA)
Description
Vynález se týká způsobu likvidace toxických odpadů po tepelném. zušlechťování ocelí obsahujících toxickou složku dusitany.The invention relates to a process for the disposal of toxic waste after thermal treatment. treatment of steels containing the toxic nitrite component.
Při tepelném zušlechťování kovů ve strojírenských závodech vznikají odpady obsahující jako toxickou složku dusitany. Dosud se tyto odpady buď vyvážely na volné skládky, ze kterých kontaminovaly spodní vody, nebo se skladují ve strojírenských závodech, nebo se likvidují odstavným způsobem v klasickém zařízení v soustavě reakčních jímek, což je nákladné, nepružné a dochází při tom k nárazovému vysokému zasolování vodních toků při vypouštění zneškodněných odpadních vod.Heat treatment of metals in engineering plants produces waste containing nitrites as a toxic component. So far, these wastes have either been shipped to loose landfill sites from which they have contaminated groundwater, or stored in engineering plants, or disposed of in a conventional facility in a sump system, which is costly, inflexible and causes high salinisation. flows during discharged waste water.
Uvedené nevýhody eliminuje způsob oxidačního zneškodnění toxického odpadu Obsahujícího dusitany podle vynálezu, jehož podstata spočívá v tom, že se odpad okyselí na hodnotu pH 2 až 6,5, načež se k odpadu přidávají chloridy, pokud již nejsou v odpadu přítomny, k dosažení koncentrace chloridů v odpadu 3 až 20 g Cl- . 1_1 a takto upravený odpad se elektrolyzuje průtokem elektrolyzérem obsahujícím střídavě za sebou situované katody a anody, přičemž elektrody mohou být stacionární, rotační nebo výkyvné.The disadvantage of these disadvantages is the method of oxidative disposal of the toxic nitrite-containing waste according to the invention, which consists in acidifying the waste to a pH of 2 to 6.5, and then adding chlorides to the waste in order to achieve a chloride concentration in waste 3 to 20 g Cl - . 1 1 and the thus treated waste flow electrolyzer is electrolyzed comprising alternately located behind the anode and cathode, the electrodes may be stationary, rotating, or pivoting.
Při průtoku roztoku chloridu a dusitanu se v anodových prostorech oxidují dusitany působením vznikajícího chloru, kyslíku a vlivem pozitivního potenciálu anody na dusičnany, které je možno dále využívat jako velmi účinná dusíkatá hnojivá.When the chloride and nitrite solution flows, nitrites are oxidized in the anode compartments due to the formation of chlorine, oxygen and the positive potential of the anode on nitrates, which can be further used as very effective nitrogen fertilizers.
Zařízení na elektrolytickou oxidaci je elektrolyzér obsahující jednu nebo více anod a jednu nebo více katod různým způsobem situovaných bud planparalelně uspořádaných tak, aby vytvářely labyrint, kterým elektrolyt protéká, nebo anody nebo katody nebo oba druhy elektrod rotují, nebo jsou jen částečně ponořeny ve zneškodňovaném roztoku odpadu, popřípadě mohou elektrony fungovat jako bipolární.An electrolytic oxidation device is an electrolyzer comprising one or more anodes and one or more cathodes in differently situated planes arranged parallel to form a labyrinth through which the electrolyte flows, or the anodes or cathodes or both types of electrodes rotate or are only partially submerged in the disposal solution or electrons can function as bipolar.
Výhodou způsobu podle vynálezu jsou nízké investiční a provozní náklady, možnost automatizace a miniaturizace a především snížení zasolení zneškodněných odpadních vod, které.se vypouští do vodoteče.The advantages of the process according to the invention are low investment and operating costs, the possibility of automation and miniaturization and, above all, a reduction in the salinity of the waste water which is discharged into the watercourse.
PříkladExample
Elektrolytickou oxidací se likviduje odpadní popouštěcí sůl o obsahu 12,5 '% NaNOz a 18 % NaCl. Roztok se okyselí kyselinou chlorovodíkovou do rozmezí pH 4 až 5 a nechá se proudit v zařízení, které sestává z průtokové nádoby o délce 492 mm a šířce 113 mm a , šesti anod o rozměru 150 mm x 83 mm a šesti katod stejného roz203560 měru, přičemž vzájemná vzdálenost elektrod je 30 mm. 'The waste tempering salt containing 12.5% NaNO2 and 18% NaCl is disposed of by electrolytic oxidation. The solution is acidified with hydrochloric acid to a pH range of 4-5 and allowed to flow in a device consisting of a flow vessel having a length of 492 mm and a width of 113 mm and six anodes of 150 mm x 83 mm and six cathodes of the same size. the distance between the electrodes is 30 mm. '
Oxidace probíhá za těchto pracovních podmínek: proud 18,5 A a 6,5 V, průtoková rych<The oxidation takes place under the following operating conditions: current 18.5 A and 6.5 V, flow rate <
lost 30 litrů za hodinu. Zneškodněný odpad obsahuje přebytek aktivního chloru v množství 0,1 g.. I“1. Reakce na NAz- je negativní.lost 30 liters per hour. Disposal of waste contains an excess of active chlorine in an amount of 0.1 g .. I '1. The reaction to NAz - is negative.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS754478A CS203560B1 (en) | 1978-11-20 | 1978-11-20 | Method for the oxidative neutralization of toxical scrape containing nitrites |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS754478A CS203560B1 (en) | 1978-11-20 | 1978-11-20 | Method for the oxidative neutralization of toxical scrape containing nitrites |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CS203560B1 true CS203560B1 (en) | 1981-03-31 |
Family
ID=5424787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CS754478A CS203560B1 (en) | 1978-11-20 | 1978-11-20 | Method for the oxidative neutralization of toxical scrape containing nitrites |
Country Status (1)
| Country | Link |
|---|---|
| CS (1) | CS203560B1 (en) |
-
1978
- 1978-11-20 CS CS754478A patent/CS203560B1/en unknown
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