IMPROVING ENVIRONMENTAL INDICATORS OF INTERNAL COMBUSTION ENGINE BY USING SCRUBBER TECHNOLOGIES AND EFFECT OF "MICROEXPLOSIONS" DROPS OF WATER-FUEL EMULSION
The rules of international organizations in the field of environmental protection are consistently tightening the requirements for the level of harmful emissions into the atmosphere from both stationary and ship power plants (SPP). To ensure this level, it is necessary to use wet scrubber technology...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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National Aerospace University «Kharkiv Aviation Institute»
2019-08-01
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| Series: | Авіаційно-космічна техніка та технологія |
| Subjects: | |
| Online Access: | http://nti.khai.edu/ojs/index.php/aktt/article/view/868 |
| Summary: | The rules of international organizations in the field of environmental protection are consistently tightening the requirements for the level of harmful emissions into the atmosphere from both stationary and ship power plants (SPP). To ensure this level, it is necessary to use wet scrubber technology and a hybrid system when used simultaneously or sequentially. The study aims to develop a wet scrubber scheme for сomplex exhaust gas cleaning system for an internal combustion engine (ICE). Experimental studies have shown that at the end of the combustion zone of a water-fuel emulsion (WFE) with a water content of 30 % due to the influence of intense turbulence created during microexplosions of WFE droplets in the zone of active combustion in gases, an equimolar NO2 : NO ratio is created automatically (or almost this). It is required to enhance the absorption properties of exhaust gases in front of the scrubber. It is established that when WFE is burnt with water content Wr = 30 %, the content of toxic ingredients in the exhaust gases in front of the scrubber will be at a much lower level compared to the cleaning system at Wr = 2 %. A scheme of a wet scrubber has been developed, which allows to clean exhaust gases from three toxic exhaust gas ingredients simultaneously with heating water to exhaust gas boiler and drying wet gases after a wet scrubber due to the heat of the intermediate coolant. It has been established that the heat of this intermediate coolant is sufficient not only to heat the feed water of the exhaust gas boiler, but also to provide a hot water supply system for the ship, since in the scrubber, as a result of exhaust water vapor condensation up to 8 % of the lower combustion heat of the fuel burned power units. Analysis of the calculated studies showed that the using of a wet scrubber reduces the NOx content from 258 ppm to 52 ppm, SO2 - from 107 ppm to 22 ppm, CO2 - from 3.1 % to 0.93 %. The developed wet scrubber scheme can be used to clean the exhaust gases of internal combustion engines from toxic ingredients and to provide the necessary level of exhaust gas purification recommended by the IMO (International Maritime Organization). |
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| ISSN: | 1727-7337 2663-2217 |