SMANJENJE ZAGAĐENJA POVRŠINSKIH I PODZEMNIH VODA PRIMENOM MALOVODNOG TRANSPORTA I ODLAGANJA PEPELA I ŠLJAKE U TENT-B

D. Kisić, dipl.ing.tehn, N. Ćeran, dipl.ing.tehn., dr E. Boti-Raičević, dipl.ing.tehn., D. Dražović, dipl.ing.rud., S. Andrić, dipl.hem.
TENT d.o.o. Obrenovac, Rudarski Institut - Zemun, Direkcija EPS-a Beograd

REZIME
U TE "Nikola Tesla" B se preko dvadeset godina primenjuje, hidraulički transport i odlaganje pepela (pepeo:voda-1:10). Ovaj način transporta je potvrdio negativni uticaj kako na kvalitet vazduha, tako i na kvalitet površinskih i podzemnih voda.
Navedeni ekološki problemi su razlog za sprovođenje rekonstrukcije postojećeg sistema zamenom novom tehnologijom "guste" hidrosmeše u odnosu (pepeo:voda - 1:1). Ovaj način se koristi preko petnaest godina u sličnim termoelektranama u Evropi. U toku je izrada Idejnog projekta i ugovaranje opreme. Očekuje se smanjenje ekoloških problema, koji se ogledaju u smanjenju količina voda za transport pepela, smanjenju koli?ina otpadnih voda, eliminaciji prelivnih voda, recirkulaciji drenažnih voda, što će omogućiti smanjenje negativnog uticaja na kvalitet podzemnih voda... Pored toga, nova tehnologija će omogućiti sakupljanje suvog pepela i šljake u silosima, i mogućnost njihovog korišćenja u građevinske svrhe.

KLJUČNE REČI: hidraulički transport, pepeo, šljaka, drenažne vode, recirkulacija

REDUCTION OF SURFACE AND GROUND WATER POLLUTION BY MEANS OF LOW-WATER ASH AND SLAG TRANSPORTATION AND DISPOSAL AT TENT-B

SUMMARY
The available method of collection and hydraulic transport of ash and slag (ratio of ash and water 1:10), in use for more than 20 years at the TPP TENT-B has confirmed the negative experience, not only with regard to the collection, transportation and disposal, but also with regard to the air quality in the surrounding settlements and the quality of surface and ground waters.
The above environmental issues are the reason for the reconstruction of the existing system and its replacement with the technology of "thick slurry" (ratio 1:1), which has been used for more than 15 years in similar thermal power plants across Europe. Preparation of Preliminary design and contracting of equipment are in progress at the moment. We expect the reduction of environmental problems, which are reflected in the following: Reduction of water quantities for ash transportation, hence reduction of waste water quantity, Elimination of overflows (there shall be no discharge of waste - overflow water), Recirculation of drainage water, which shall enable reduction of negative impact to the quality of ground waters. In addition, the new technology will enable collecting of dry ash and slag in silos and the possibility of their use in construction.

KEY WORDS: hydraulic transport, ash, slag, drainage water, recirculation