scholarly journals System for complex exhaust gas cleaning of internal combustion engine with water-fuel emulsion burning

2019 ◽  
Vol 55 (1) ◽  
pp. 28-33
Author(s):  
V. S. Kornienko
Keyword(s):  
Internal Combustion Engine ◽  
Water Content ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Environmental Indicators ◽  
Dew Point ◽  
Exhaust Gas ◽  
Gas Cleaning ◽  
Exhaust Gas Cleaning ◽  
Heating Surfaces

The necessity to fulfill all requirements of international organizations in the field of environmental protection, need to reduce heat loss in combustion of organic fuels, increasing economy and reliability of all elements of ship's power plant make it necessary to develop complex technology. The aim of study is to develop system for complex exhaust gas cleaning of internal combustion engine (ICE). For performing tasks in technology of proposed method, providing solutions to problems of improving economic efficiency, improvement of environmental indicators and reliability, it is envisaged 5 stages of technological process. At all stages conditions for appropriate running of physico-chemical processes in the next stage are created. Possibility of solving complex problems in proposed technology is ensured by combustion of water-fuel emulsion (WFE) with specifically recommended value of water content W r = 30%. When WFE is burnt with a water content of 30%, the low-temperature corrosion intensity decreases, which allows to install a condensing heating surfaces in exhaust gas boilers. At these conditions an equimolar ratio of nitrogen oxides NO2:NO in gases is required, which is necessary to activate their absorption properties. When WFE is burnt with water content W r = 30% the metal surface with a temperature below of dew point H2SO4 passivates. Experimental studies performed show that: 1 m2 of condensing surface absorbs 3.4 mg/m3 of NOx and 0.89 mg/m3 of SO2, which makes it possible to decrease the NOx concentration by 1.55 times and SO2 - in 1.5 times. There is a process of precipitation of toxic solid ash and soot particles: from 150...170 mg/m3 (at outlet of ICE when WFE is burnt with W r = 30%) to 70...90 mg/m3 after the condensing surface. Consumption of water with alkaline properties decreases when NOx, SO2, CO2 concentration is reduced in front of scrubbers. Reducing pollution of heating surfaces increases the cleaning period of EGB in 2.5 times. The using of complex system provides efficient exhaust gas cleaning at the level recommended by IMO.

scholarly journals ИСПОЛЬЗОВАНИЕ ЦИКЛОНА И ЭФФЕКТА "МИКРОВЗРЫВОВ" КАПЕЛЬ ВОДОТОПЛИВНОЙ ЭМУЛЬСИИ ПРИ КОМПЛЕКСНОЙ ОЧИСТКЕ ВЫХЛОПНЫХ ГАЗОВ ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ

2019 ◽  
pp. 15-19
Author(s):  
Виктория Сергеевна Корниенко ◽  
Роман Николаевич Радченко
Keyword(s):  
Internal Combustion Engine ◽  
Sharp Increase ◽  
Combustion Engine ◽  
Experimental Studies ◽  
Heating Surface ◽  
Internal Combustion ◽  
Solid Particles ◽  
Exhaust Gas ◽  
Gas Cleaning ◽  
Exhaust Gas Cleaning

Obtaining additional energy due to the deep utilization of the internal combustion engine (ICE) heat losses al-lows saving fuel used for the operation of the ship's power plant. This accordingly leads to a reduction of the emissions of harmful substances into the atmosphere, contributes to meet the more stringent standards of the International Maritime Organization (IMO) governing the limits of these emissions. The study aims to develop the system of complex exhaust gas cleaning for an internal combustion engine (ICE). For solving the tasks in the technology of proposed method there were 6 stages of technological process envisaged. Based on experimental and theoretical studies, a setup for complex exhaust gas cleaning using a cyclone and the effect of "microexplosions" of a water-fuel emulsion (WFE) droplet was developed. It has been established that as a result of activated WFE combustion we obtain at the engine outlet exhaust gases of a corresponding composition with a reduced amount of toxic ingredients down to 35 % and below and most importantly – an equimolar ratio of NO2 /NO to NOx. Experimental studies have shown that in the condensate acid under these conditions, an average concentration of about 57 % is established, which ensures a sharp increase in the absorption of SO2 and NOx. The presence of an equimolar (or almost this) NO2 /NO ratio in gases ensures the passivation of the condensation surface in exhaust gas boiler (EGB) from carbon steel. This ensures a sharp decrease in the low-temperature corrosion intensity, an increase in the operating reliability of condensation surfaces and the possibility of a sharp increase in the engine exhaust gas utilization depth to 80...90 °C instead of 160 °C. For the final gas cleaning, it was proposed to install a venturi scrubber and a cyclone-absorber on the gas path of ICE. Based on experimental studies, it has been established that the installation of a condensation heating surface in the EGB reduces the NOx content in gases by 55 %, SO2 - by 50 %, and the content of solid particles - by 3 times. The developed complex system can be used to clean the ICE gases to the level recommended by IMO.

scholarly journals СОКРАЩЕНИЕ ВЫБРОСОВ ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ ПРИ СЖИГАНИИ ВОДОТОПЛИВНЫХ ЭМУЛЬСИЙ C ИСПОЛЬЗАНИЕМ ЭФФЕКТА "МИКРОВЗРЫВОВ"

2019 ◽  
pp. 87-91
Author(s):  
Виктория Сергеевна Корниенко ◽  
Роман Николаевич Радченко ◽  
Юрий Георгиевич Щербак
Keyword(s):  
Complex System ◽  
Low Temperature ◽  
Water Content ◽  
Combustion Process ◽  
Experimental Studies ◽  
Environmental Indicators ◽  
Dew Point ◽  
Exhaust Gas ◽  
Acid Vapor ◽  
Exhaust Gas Cleaning

The requirements of international organizations in the field of environmental protection, reduction of heat losses and thermal emissions from the burning of organic fuels, increasing the efficiency and reliability of operation both stationary and ship's power plants (SPP) acutely raise the question of the development of complex cleaning technologies. The study aims to develop a system for complex exhaust gas cleaning of the internal combustion engine (ICE). For performing tasks in the technology of the proposed method were envisaged 6 stages of a technological process. It was established that the primary and decisive factor for solving the tasks in development a complex system for improving environmental indicators, reducing corrosion and heat emissions is the organization of the water-fuel emulsion (WFE) combustion process in the ICE based on sulfur fuels with water content of about 30% and using the effect of "microexplosions" drops of water. The conducted experimental studies have shown that when WFE is burned with water content Wr = 30 %, an equimolar (or almost this) NO2: NO ratio necessary for activating the absorption properties of exhaust gases is created in gases. The results of studies have shown that under these conditions, passivation of the metal surface with a temperature below of dew point temperature of H2SO4 vapors takes place and therefore it becomes possible to significantly reduce the low-temperature corrosion of the condensation surface. This made it possible to install a low-temperature condensing heating surface with a surface temperature below the dew point of sulfuric acid vapor at the outlet of exhaust gas boiler after the ICE. Analysis of the experimental dates shows that: 1 m2 of condensing surface absorbs 3.4 mg/m3 of NOx and 0.89 mg/m3 of SO2, which makes it possible to decrease the NOx concentration by 1.55 times and SO2 - in 1.5 times. There is a process of precipitation of toxic solid ash and soot particles: from 150...170 mg/m3 (at the outlet of ICE when WFE is burnt with Wr = 30 %) to 70...90 mg/m3 after the condensing surface. Consumption of water with alkaline properties decreases when NOx, SO2, CO2 concentration is reduced in front of scrubbers. Reducing pollution of heating surfaces increases the cleaning period of EGB in 2.5 times. The developed complex system can be used to clean the ICE gases to the level recommended by IMO.

Measurement of Exhaust Gas Velocity in an Internal Combustion Engine

1975 ◽  
Author(s):  
M. K. Gajendra Babu ◽  
P. A. Janakiraman ◽  
B. S. Murthy
Keyword(s):  
Internal Combustion Engine ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Exhaust Gas ◽  
Gas Velocity

scholarly journals An optical method for measuring exhaust gas pressure from an internal combustion engine at high speed

2017 ◽  
Vol 88 (12) ◽  
pp. 125004 ◽  
Author(s):  
Felix C. P. Leach ◽  
Martin H. Davy ◽  
Dmitrij Siskin ◽  
Ralf Pechstedt ◽  
David Richardson
Keyword(s):  
Internal Combustion Engine ◽  
Optical Method ◽  
High Speed ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Gas Pressure ◽  
Exhaust Gas

A car air-conditioning system based on an absorption refrigeration cycle using energy from exhaust gas of an internal combustion engine

2008 ◽  
Vol 19 (4) ◽  
pp. 6-11 ◽  
Author(s):  
G. Vicatos ◽  
J. Gryzagoridis ◽  
S. Wang
Keyword(s):  
Internal Combustion Engine ◽  
Air Conditioning ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Refrigeration Cycle ◽  
Exhaust Gas ◽  
Absorption Refrigeration ◽  
Air Conditioning System ◽  
Theoretical Design ◽  
Condi Tions

Energy from the exhaust gas of an internal combus-tion engine is used to power an absorption refriger-ation system to air-condition an ordinary passenger car. The theoretical design is verified by a unit that is tested under both laboratory and road-test condi-tions. For the latter, the unit is installed in a Nissan 1400 truck and the results indicate a successful pro-totype and encouraging prospects for future devel-opment.

scholarly journals The impact of ignition system damage on the emission of toxic substances in a spark-ignition internal combustion engine

2019 ◽  
Vol 179 (4) ◽  
pp. 86-92
Author(s):  
Mieczysław DZIUBIŃSKI ◽  
Ewa SIEMIONEK ◽  
Artur DROZD ◽  
Michał ŚCIRKA ◽  
Adam KISZCZAK ◽  
...  
Keyword(s):  
Internal Combustion Engine ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Spark Ignition ◽  
Operating Conditions ◽  
Spark Ignition Engine ◽  
Exhaust Gas ◽  
Toxic Substances ◽  
Ignition System ◽  
The Impact

The article discusses the impact of ignition system damage on the emission of toxic subcategories in a spark-ignition internal combustion engine. The aim of the work was to develop an analytical model of ignition system diagnostics, test performance and comparative analysis of the results of simulations and experiments. The model developed allows to analyse the basic parameters of the ignition system affecting the content of toxic substances in the exhaust. Experimental tests were carried out using the MAHA MGT5 exhaust gas analyser for four different combustion engines fueled with petrol at various operating conditions. During the tests, the content of toxic substances in the exhaust gas of a properly working engine and the engine working with damage to the ignition system were registered. The tests will be used to assess the impact of the damage of the spark-ignition engine on the emission of individual components of toxic fumes.

scholarly journals The issue of improving the efficiency of nitrogen oxide neutralization systems in diesel internal combustion engines

2021 ◽  
Vol 1 (2) ◽  
pp. 101-112
Author(s):  
A.V. Shabanov ◽  
◽  
D.V. Kondratiev ◽  
V.K. Vanin ◽  
A.Yu. Dunin ◽  
...  
Keyword(s):  
Nitrogen Oxides ◽  
Internal Combustion Engine ◽  
Power Plants ◽  
Internal Combustion Engines ◽  
High Efficiency ◽  
Combustion Engine ◽  
Thermal Power ◽  
Internal Combustion ◽  
Urea Solution ◽  
Exhaust Gas

The most effective method of reducing nitrogen oxides in diesel exhaust gas is selective purifica-tion by the SCR-NH3 method. The method uses ammonia released during thermolysis and hydroly-sis of a urea solution when it is injected through a nozzle into a neutralizer. This method has a rela-tively low efficiency of cleaning the exhaust gas from nitrogen oxides. The main factor hindering the achievement of high efficiency of the NOx neutralization system is the insufficiently high tem-perature during the implementation of this process. The article analyzes various ways to increase the efficiency of the neutralization process and proposes a new method for neutralizing NOx by using urea injection into the cylinders of the inter-nal combustion engine at the expansion stroke in a diesel internal combustion engine. Efficiency can be achieved due to a higher exhaust gas temperature in the cylinder of the internal combustion engine and an increase in the time of the process of thermolysis and hydrolysis of urea. The kinetics of the decomposition of nitrogen oxides, the process of NH3 oxidation, and the cal-culation of temperature conditions in the cylinder of a diesel internal combustion engine at the ex-haust cycle are considered. The experience of neutralization of NOx contained in the flue gases of thermal power plants, where NOx purification takes place at high temperatures without the use of a catalyst, is analyzed. It is shown that the modernization of the SCR-NH3 process, due to the injection of urea at the exhaust stroke in a diesel internal combustion engine, will simplify the existing method of NOx neutralization and at the same time obtain additional advantages for a modern high-speed engine

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