Abstract
The mathematical modeling is performed of the efficiency of flue gas cleaning from fly ash particles of coal-fired thermal power plants, upon installation of a preliminary flue gas cleaning system that consists of a louvered dust concentrator and a battery cyclone, with the recirculation of flue gas from the battery cyclone outlet to the electrostatic precipitator pre-chamber. Based on the available experimental data for the fractional composition of fly ash downstream the boilers of coal-fired TPPs, the size distribution functions were calculated, of fly ash particles at each stage of the preliminary dust-cleaning process, as well as concentrations and modified particle size distributions, to be further used as the input data for designing options and scope of the reconstruction of existing electrostatic precipitators. Bibl. 13, Fig. 3.
Highlights
Àëüòåðíàòèâíîå ðåøåíèå äëÿ ðåêîíñòðóêöèè ýëåêòðîôèëüòðîâ óãîëüíûõ òåïëîâûõ ýëåêòðè÷åñêèõ ñòàíöèé (ÒÝÑ)Âûïîëíåíî ìàòåìàòè÷åñêîå ìîäåëèðîâàíèå ïðîöåññà î÷èñòêè äûìîâûõ ãàçîâ îò ÷àñòèö ëåòó÷åé çîëû óãîëüíûõ ÒÝÑ ïðè óñòàíîâêå ñèñòåìû ïðåäâàðèòåëüíîé î÷èñòêè äûìîâûõ ãàçîâ â æàëþçèéíîì ïûëåêîíöåíòðàòîðå è áàòàðåéíîì öèêëîíå ïåðåä ýëåêòðîñòàòè÷åñêèì ôèëüòðîì ñ ðåöèðêóëÿöèåé äûìîâûõ ãàçîâ ñ âûõîäà áàòàðåéíîãî öèêëîíà â ôîðêàìåðó ýëåêòðîôèëüòðà
Óêðàèíà êàê ÷ëåí Ýíåðãåòè÷åñêîãî ñîîáùåñòâà ïðèíÿëà íà ñåáÿ îáÿçàòåëüñòâà ïîñëå 31.12.2017 âûïîëíÿòü ýêîëîãè÷åñêèå òðåáîâàíèÿ Äèðåêòèâû 2001/80/EC, ñîãëàñíî êîòîðûì íåîáõîäèìî îáåñïå÷èòü âûõîäíóþ êîíöåíòðàöèþ ÷àñòèö çîëû ïîñëå ñóùåñòâóþùèõ óãîëüíûõ êîòëîâ íå âûøå 50 ìã/íì3 [1]
The mathematical modeling is performed of the efficiency of flue gas cleaning from fly ash particles of coal-fired thermal power plants, upon installation of a preliminary flue gas cleaning system that consists of a louvered dust concentrator and a battery cyclone, with the recirculation of flue gas from the battery cyclone outlet to the electrostatic precipitator pre-chamber
Summary
Âûïîëíåíî ìàòåìàòè÷åñêîå ìîäåëèðîâàíèå ïðîöåññà î÷èñòêè äûìîâûõ ãàçîâ îò ÷àñòèö ëåòó÷åé çîëû óãîëüíûõ ÒÝÑ ïðè óñòàíîâêå ñèñòåìû ïðåäâàðèòåëüíîé î÷èñòêè äûìîâûõ ãàçîâ â æàëþçèéíîì ïûëåêîíöåíòðàòîðå è áàòàðåéíîì öèêëîíå ïåðåä ýëåêòðîñòàòè÷åñêèì ôèëüòðîì ñ ðåöèðêóëÿöèåé äûìîâûõ ãàçîâ ñ âûõîäà áàòàðåéíîãî öèêëîíà â ôîðêàìåðó ýëåêòðîôèëüòðà. — ñóõèå ýëåêòðîñòàòè÷åñêèå ôèëüòðû (ÝÑÔ) òèïà ÏÃÄÑ è ÓÃ2, óñòàíîâëåííûå â 1960-õ ãã., ñ âûñîòîé îñàäèòåëüíûõ ýëåêòðîäîâ 7,5 ì è ôàêòè÷åñêîé ýôôåêòèâíîñòüþ 90–96 %;. — ñóõèå ýëåêòðîñòàòè÷åñêèå ôèëüòðû òèïà ÝÃÀ, ÝÃÂ, ÝÃ3, ÓÃ3, óñòàíîâëåííûå â 1970–1980 ãã., ñ âûñîòîé îñàäèòåëüíûõ ýëåêòðîäîâ 12 ì è ôàêòè÷åñêîé ýôôåêòèâíîñòüþ 95–98,5 %. Áûëè óñòàíîâëåíû íîâûå ýëåêòðîôèëüòðû ñ âûñîòîé îñàäèòåëüíûõ ýëåêòðîäîâ 14–15 ì, îáåñïå÷èâàþùèå ïðè ýôôåêòèâíîñòè âûøå 99,5 % âûõîäíóþ êîíöåíòðàöèþ çîëû íèæå 50 ìã/íì.  òàêîì âàðèàíòå ðåêîíñòðóêöèè ñèñòåìû ïûëåî÷èñòêè ÒÝÑ (ðèñ.1) â æàëþçèéíîì ïûëåêîíöåíòðàòîðå, ðàçìåùåííîì ïåðåä ãàçîðàñïðåäåëèòåëüíîé ðåøåòêîé (ÃÐÐ) ýëåêòðîôèëüòðà, ìîæåò áûòü îòäåëåíî äî 50 % ìàññû ïûëè âìåñòå ñ 10 % îáúåìíîãî ðàñõîäà äûìîâûõ ãàçîâ (ÄÃ). Ñ âûõîäà öèêëîíà íå óëîâëåííàÿ â íåì ëåòó÷àÿ çîëà ñ ïîòîêîì äûìîâûõ ãàçîâ ñ ïîìîùüþ äîïîëíèòåëüíîãî âåíòèëÿòîðà (äûìîñîñà) áóäåò íàïðàâëÿòüñÿ â ôîðêàìåðó ýëåêòðîôèëüòðà
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