Аналіз екологічної ефективності димових труб котелень за умов застосування теплоутилізаційних технологій
| Rok vydání: | 2020 |
|---|---|
| Předmět: |
Flue gas
Waste management business.industry Boiler (power generation) 020206 networking & telecommunications 02 engineering and technology 021001 nanoscience & nanotechnology Combustion котельні установки запобігання конденсатоутворенню в газовідвідних трактах димові труби з антикорозійних матеріалів максимальні концентрації шкідливих викидів Thermal insulation Natural gas Heat recovery ventilation 0202 electrical engineering electronic engineering information engineering lcsh:SD1-669.5 General Earth and Planetary Sciences Environmental science Chimney lcsh:Forestry 0210 nano-technology business NOx General Environmental Science |
| Zdroj: | Науковий вісник НЛТУ України, Vol 30, Iss 4, Pp 104-108 (2020) |
| ISSN: | 2519-2477 1994-7836 |
| DOI: | 10.36930/40300418 |
| Popis: | The results of the analysis of the environmental efficiency of chimneys of boiler plants with systems for the deep heat recovery of exhaust gases are presented in the paper. These systems used heat-recovery equipment designed to heat the boiler's return heating water by cooling the boiler exhaust gases, chimneys of various types using special materials, the thermal method of protecting gas-exhaust ducts by bypassing part of the hot gases from the boiler through the specified equipment. Chimneys were considered in the manufacture of their casing from anticorrosive materials or when mounted in a brick (or other pipe with improved thermal insulation properties) gas exhaust trunks from these materials. Condensation is allowed in such pipes, which reduces the heat consumption for the implementation of thermal protection of chimneys from corrosion due to condensation. Computational investigation and analysis of the results concerned only the dispersion indicators of harmful substances contained in the flue gases of gas-fired boiler plants of municipal heat power engineering and subject to the design values of the boiler load. The use of the bypass method is designed to ensure the absence of moisture loss in the gas-ducts leading to the chimney and the required temperature level of the flue gases at the chimney outlet to obtain standard indicators for the dispersion of harmful emissions into the environment by this chimney. The calculations were carried out in accordance with regulatory methods for determining environmental indicators for single chimneys with the indicated design features. The results of the maximum concentrations and patterns of dispersion in the environment adjacent to the chimney of the most harmful emissions resulting from the combustion of natural gas are presented. The concentrations of carbon oxide CO and nitrogen oxides NOx were studied, depending on the operation mode of the boilers according to the heat schedule of the boiler room. The necessary bypass fractions of hot gases from the boiler for anticorrosive protection of the gas-ducts leading to the chimney are determined. It is shown that by using of modern heat recovery technologies, the dispersion of CO and NOx emissions in the environment is realized according to modern regulatory requirements for the chimneys under consideration, by observing the recommended modes of operation of the boilers with a decrease in their number according to the temperature chart of boiler plant. |
| Databáze: | OpenAIRE |
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