PL405249A1 - Method for reducing emission of mercury from coal firing boilers - Google Patents
Method for reducing emission of mercury from coal firing boilersInfo
- Publication number
- PL405249A1 PL405249A1 PL405249A PL40524913A PL405249A1 PL 405249 A1 PL405249 A1 PL 405249A1 PL 405249 A PL405249 A PL 405249A PL 40524913 A PL40524913 A PL 40524913A PL 405249 A1 PL405249 A1 PL 405249A1
- Authority
- PL
- Poland
- Prior art keywords
- mercury
- flue gas
- plants
- oxidized
- particles
- Prior art date
Links
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 title abstract 6
- 229910052753 mercury Inorganic materials 0.000 title abstract 5
- 238000000034 method Methods 0.000 title abstract 4
- 239000003245 coal Substances 0.000 title 1
- 238000010304 firing Methods 0.000 title 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract 3
- 239000003546 flue gas Substances 0.000 abstract 3
- 239000002245 particle Substances 0.000 abstract 3
- 239000002956 ash Substances 0.000 abstract 2
- 239000000428 dust Substances 0.000 abstract 2
- 239000007789 gas Substances 0.000 abstract 2
- 239000007800 oxidant agent Substances 0.000 abstract 2
- 230000001590 oxidative effect Effects 0.000 abstract 2
- 239000012286 potassium permanganate Substances 0.000 abstract 2
- UKLNMMHNWFDKNT-UHFFFAOYSA-M sodium chlorite Chemical compound [Na+].[O-]Cl=O UKLNMMHNWFDKNT-UHFFFAOYSA-M 0.000 abstract 2
- 239000002351 wastewater Substances 0.000 abstract 2
- QLOKJRIVRGCVIM-UHFFFAOYSA-N 1-[(4-methylsulfanylphenyl)methyl]piperazine Chemical compound C1=CC(SC)=CC=C1CN1CCNCC1 QLOKJRIVRGCVIM-UHFFFAOYSA-N 0.000 abstract 1
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 abstract 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 1
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 abstract 1
- 239000005708 Sodium hypochlorite Substances 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 229910052925 anhydrite Inorganic materials 0.000 abstract 1
- 229910001424 calcium ion Inorganic materials 0.000 abstract 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 abstract 1
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 239000004568 cement Substances 0.000 abstract 1
- 239000007795 chemical reaction product Substances 0.000 abstract 1
- 150000001875 compounds Chemical class 0.000 abstract 1
- 239000012717 electrostatic precipitator Substances 0.000 abstract 1
- 239000010881 fly ash Substances 0.000 abstract 1
- 229940008718 metallic mercury Drugs 0.000 abstract 1
- KMUONIBRACKNSN-UHFFFAOYSA-N potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 abstract 1
- 238000010248 power generation Methods 0.000 abstract 1
- 229960002218 sodium chlorite Drugs 0.000 abstract 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
- 238000004056 waste incineration Methods 0.000 abstract 1
Landscapes
- Treating Waste Gases (AREA)
Abstract
Wynalazek ujawnia sposób ograniczania emisji rtęci z kotłów spalających węgiel w procesie wytwarzania energii w elektrowniach, elektrociepłowniach, kotłowniach lokalnych i przemysłowych, a także w spalarniach odpadów, cementowniach i hutach. Sposób redukcji emisji rtęci charakteryzuje się tym, że rtęć metaliczną oraz część NO zawartych w spalinach utlenia się w kanale spalin przed odpylaczem, za pomocą, rozpylonego roztworu utleniacza, zawierającego ścieki po mokrym odsiarczaniu spalin i rozpuszczone w nich selektywne związki utleniające, wybrane z grupy obejmującej nadmanganian potasu (KMnO4) i/lub chromian potasu (K2Cr2O7) i/lub nadtlenek wodoru (H2O2) i/lub chloryn sodu (NaClO2) i/lub podchloryn sodu (NaOClO). Roztwór utleniacza rozpyla się do strumienia spalin, na krople o średnicy korzystnie mniejszej od 40 [im i kontaktuje z nim spaliny przez 0,5 do 3,0 sekund w temperaturze minimum 100°C. Następnie pary rtęci utlenionej i produkty reakcji SO2 z zawartymi w roztworze utleniacza, pochodzącymi ze ścieków, jonami wapniowymi, kieruje się ze strumieniem spalin do elektrofiltru, w którym usuwa się cząsteczki CaSO4 oraz adsorbuje utlenione pary rtęci (Hg2+) na cząsteczkach popiołu lotnego oraz węgla wbudowanego w cząsteczki popiołu i usuwa wraz z popiołem w odpylaczu.The invention discloses a method of reducing mercury emissions from coal-burning boilers in the process of power generation in power plants, combined heat and power plants, local and industrial boiler rooms, as well as in waste incineration plants, cement plants and steel works. The method of reducing mercury emissions is characterized by the fact that metallic mercury and some of the NO contained in the flue gas are oxidized in the flue gas duct before the dust collector by means of a sprayed oxidant solution containing waste water after wet flue gas desulphurisation and selective oxidizing compounds dissolved therein, selected from the group consisting of potassium permanganate (KMnO4) and / or potassium chromate (K2Cr2O7) and / or hydrogen peroxide (H2O2) and / or sodium chlorite (NaClO2) and / or sodium hypochlorite (NaOClO). The oxidizer solution is sprayed into the exhaust stream into droplets preferably with a diameter smaller than 40 [mu] m and the exhaust gas contacted with it for 0.5 to 3.0 seconds at a minimum temperature of 100 ° C. Next, oxidized mercury vapors and reaction products of SO2 with calcium ions contained in the wastewater solution, are directed with the exhaust gas stream to an electrostatic precipitator, in which CaSO4 particles are removed and adsorbed oxidized mercury vapors (Hg2 +) on fly ash particles and embedded carbon in ash particles and removes along with the ash in the dust collector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL405249A PL231036B1 (en) | 2013-09-05 | 2013-09-05 | Method for reducing emission of mercury from coal firing boilers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL405249A PL231036B1 (en) | 2013-09-05 | 2013-09-05 | Method for reducing emission of mercury from coal firing boilers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| PL405249A1 true PL405249A1 (en) | 2015-03-16 |
| PL231036B1 PL231036B1 (en) | 2019-01-31 |
Family
ID=52633763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL405249A PL231036B1 (en) | 2013-09-05 | 2013-09-05 | Method for reducing emission of mercury from coal firing boilers |
Country Status (1)
| Country | Link |
|---|---|
| PL (1) | PL231036B1 (en) |
-
2013
- 2013-09-05 PL PL405249A patent/PL231036B1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| PL231036B1 (en) | 2019-01-31 |
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