Long-Term Neutralization of Acidic Condensate from Gas Condensing Boilers

Jiří Horák, Lenka Kuboňová, Milan Dej, Jiří Ryšavý, Stanislav Bajer, Zdeněk Kysučan, Pavel Ulrich, Pavel Mareček, Filip Tesař, Martin Garba, František Hopan and Petr Praus ()
Additional contact information
Jiří Horák: Energy Research Centre, Centre for Energy and Environmental Technologies, VSB-Technical University of Ostrava, 708 00 Ostrava, Czech Republic
Lenka Kuboňová: Energy Research Centre, Centre for Energy and Environmental Technologies, VSB-Technical University of Ostrava, 708 00 Ostrava, Czech Republic
Milan Dej: Energy Research Centre, Centre for Energy and Environmental Technologies, VSB-Technical University of Ostrava, 708 00 Ostrava, Czech Republic
Jiří Ryšavý: Energy Research Centre, Centre for Energy and Environmental Technologies, VSB-Technical University of Ostrava, 708 00 Ostrava, Czech Republic
Stanislav Bajer: Energy Research Centre, Centre for Energy and Environmental Technologies, VSB-Technical University of Ostrava, 708 00 Ostrava, Czech Republic
Zdeněk Kysučan: Energy Research Centre, Centre for Energy and Environmental Technologies, VSB-Technical University of Ostrava, 708 00 Ostrava, Czech Republic
Pavel Ulrich: Almeva East Europe Ltd., 664 43 Želešice, Czech Republic
Pavel Mareček: Almeva East Europe Ltd., 664 43 Želešice, Czech Republic
Filip Tesař: Almeva East Europe Ltd., 664 43 Želešice, Czech Republic
Martin Garba: Energy Research Centre, Centre for Energy and Environmental Technologies, VSB-Technical University of Ostrava, 708 00 Ostrava, Czech Republic
František Hopan: Energy Research Centre, Centre for Energy and Environmental Technologies, VSB-Technical University of Ostrava, 708 00 Ostrava, Czech Republic
Petr Praus: Department of Chemistry and Physico-Chemical Processes, VSB-Technical University of Ostrava, 708 00 Ostrava, Czech Republic

Sustainability, 2022, vol. 14, issue 22, 1-13

Abstract: The pH of wastewater needs to remain between 6 and 9 to protect water organisms. Condensates from a gas condensing boiler have a pH value of about 3. An optimal way to neutralize the acid condensate is to use cheap material such as dolomite. An old-style neutralization box (NB) was tested with a standard faction of dolomite. However, it did not sufficiently neutralize the condensate. Therefore, several tests were performed involving changes to the construction of the neutralization box, a finer fraction of dolomite and aerating the condensate in the neutralization box. In summary, a new NB technology with partitions, a finer fraction of dolomite and condensate aeration proved sufficient in the neutralization of the pH of the condensate in the short and long terms. It depends on what material the heat exchanger is made of in the condensing boiler. The aluminum content reduces the effectiveness of dolomite in the long run, so aerating the condensate in the NB is recommended, which leads to its more effective neutralization.

Keywords: acidic condensate; neutralization; gas condensing boiler; dolomite; aeration (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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