Methane escape control post-treatment system of marine low-pressure dual-fuel engine
A dual-fuel engine, low-pressure technology, applied in the direction of engine control, combustion engine, internal combustion piston engine, etc., can solve the problems of increased production cost and maintenance cost, poor economy, energy consumption, etc., to avoid high back pressure and high-velocity exhaust gas Influence, improve economy, increase selectivity effect
Inactive Publication Date: 2021-01-29
HARBIN ENG UNIV
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Problems solved by technology
However, this system requires a lot of space to install the afterburner and its oil pump
Also, the system consumes more energy to heat the exhaust gas, which is not economically good as it increases production costs and maintenance costs
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[0025] The present invention is described in more detail below in conjunction with accompanying drawing example:
[0026] combine figure 1 , the present invention provides an aftertreatment system for marine low-pressure dual-fuel engines to treat fugitive methane emissions. The hybrid built-in plasma catalytic system structure complies with the methane emission regulations of my country's first and second stage emission standards, and can also be used to meet the greenhouse gas emission regulations of future natural gas dual-fuel engines. It mainly includes marine low-pressure dual-fuel engine 1, exhaust gas receiver 2, turbocharger 3, turbine bypass valve 4, hybrid athermal plasma catalytic system 5, hybrid athermal plasma catalytic reactor bypass valve 6, hybrid reaction Inlet valve 7, outlet valve 8 of mixing reactor, exhaust temperature sensor 9, plasma power supply 10, voltage regulator 11, digital oscilloscope 12, electronic control unit 13, computer 14, passive voltag...
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The invention aims to provide a methane escape control post-treatment system of a marine low-pressure dual-fuel engine, which comprises a mixing non-thermal plasma catalytic system, wherein an exhaustpipe of the marine low-pressure dual-fuel engine is connected with a waste gas receiver; an outlet of the waste gas receiver is connected with a turbocharger and a turbine bypass pipe respectively; an outlet of the turbocharger is communicated with a bypass pipe of a mixing non-thermal plasma catalytic reactor and an inlet pipe of a mixing reactor respectively; an exhaust inlet of the mixing non-thermal plasma catalytic system is connected with the inlet pipe of the mixing reactor; an exhaust outlet is connected with an outlet pipe of the mixing reactor; and the bypass pipe of the mixing non-thermal plasma catalytic reactor and the outlet pipe of the mixing reactor converge and then are communicated with the atmosphere. By using system, methane and other pollutant can be oxidized at a relatively low waste gas temperature; the operational economic efficiency of a ship is considered; the total energy consumption is reduced by the unique design of the system; and a needed mounting spaceis reduced. By using the system, the overall emission quantity of greenhouse gases of the ship is reduced.
Description
technical field [0001] The invention relates to an exhaust gas treatment system, in particular to a marine dual-fuel engine exhaust gas treatment system. Background technique [0002] Lean-burn low-pressure dual-fuel engines are becoming increasingly important in the shipping world due to environmental emissions requirements. Due to Otto cycle lean combustion conditions, zero SOx emissions, low particulate matter content (close to zero) and low NOx emissions, no additional exhaust aftertreatment system is required to meet IMO Tier III NOx emission limit requirements. [0003] Despite the many advantages of low pressure dual fuel engines, often the main problem to be solved is slipping methane. The methane escapes the combustion chamber as unburned hydrocarbons and is expelled into the atmosphere through the tailpipe. Methane from engines escaping causes a greater greenhouse effect than carbon dioxide because when methane leaks into the air, it traps heat from the sun and w...
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IPC IPC(8): F01N13/00F01N3/28F01N3/20F01N9/00F02D9/04F02D9/08F02B37/18
CPCF01N13/00F01N3/2882F01N3/206F01N9/00F02D9/04F02D9/08F02B37/183F01N2240/28Y02T10/12Y02T10/40
Inventor 周松史瑞克郭浩
Owner HARBIN ENG UNIV