Exhaust gas purification device for diesel engines using low-quality fuel below heavy oil

A diesel engine and exhaust gas technology, applied in the direction of exhaust devices, combustion engines, internal combustion piston engines, etc., can solve the problems of not being able to fully improve PM capture efficiency, achieve NOx reduction, suppress the formation of nitrogen oxides, reduce The effect of combustion temperature

Inactive Publication Date: 2017-06-13
USUI KOKUSAI SANGYO KAISHA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] That is, the diesel engine exhaust gas electrical treatment method and device described in the above-mentioned Patent Document 1 have the following problems: the electrode needles 24 in the discharge charging part 22 are short in length in the flow direction of the exhaust gas flow, and trap The plate 23 is arranged in a direction at right angles to the flow direction of the exhaust gas flow. In addition, the exhaust gas flow is in direct contact with the collecting plate 23, so the flow resistance (pressure loss: pressure loss) is relatively large; The plate 23 is thinner and the length of the flow direction of the exhaust gas flow is relatively short, so it is worried that the PM can pass through unimpeded, which cannot fully improve the possibility of PM collection efficiency; charged by corona discharge and trapped

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  • Exhaust gas purification device for diesel engines using low-quality fuel below heavy oil
  • Exhaust gas purification device for diesel engines using low-quality fuel below heavy oil
  • Exhaust gas purification device for diesel engines using low-quality fuel below heavy oil

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Embodiment 1、2

[0117] The present embodiment corresponding to the present invention 1, 2 is above-mentioned Figure 12 In the device of the ninth embodiment shown, that is, in the exhaust gas purifying device having the following structure, the temperatures of exhaust gas and EGR gas, PM, SO x , NO x In the above-mentioned exhaust gas purification device, the exhaust gas after the turbocharger 12 is cooled by the exhaust gas cooler 3 in advance, and then the exhaust gas purification device 4 in the electrostatic cyclone dust collector After the purification process, the EGR gas split out is processed at the scrubber 11, and then it is sent by the blower 13 through the gas-liquid separator 8, and the flow rate is controlled by the EGR valve 6 to return to the intercooler. 14 front intake pipe.

Embodiment 3、4

[0119] The present embodiment that is equivalent to the present invention 3,4 is above-mentioned Figure 13 In the device of the tenth embodiment shown, that is, in the exhaust gas purifying device having the following structure, the temperatures of exhaust gas and EGR gas at positions 2, 4, and 1, as well as PM and SO x , NO x In the above-mentioned exhaust gas purification device, the exhaust gas after the turbocharger 12 is divided from the exhaust pipe in an untreated state to become EGR gas, and only the EGR gas is passed through the exhaust gas. The gas cooler 3, the electrostatic cyclone dust collector exhaust gas purification device 4, the scrubber 11, and the gas-liquid separator 8 are processed. After that, the EGR gas is sent by the blower 13 and controlled by the EGR valve 6 to make it return Into the intake duct before the intercooler 14.

[0120] Basic Features

[0121] Without exhaust gas purification device Figure 18 In the device with the structure shown,...

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Abstract

The present invention provides an exhaust gas purification device of a diesel engine, which can not only efficiently remove PM, especially SOF components and sulfate components in the exhaust gas of diesel engines using low-quality fuels below heavy oil, In addition, the outflow of environmental pollutants and substances that adversely affect the ecosystem can be easily and reliably suppressed. In the exhaust gas purification device of a diesel engine using low-quality fuel below heavy oil, a structure is formed: an exhaust gas cooler is installed on the exhaust pipe connected to the exhaust manifold of the engine, and the exhaust gas is cooled The downstream side of the electric dust collection device is provided with an electric dust collection unit, which is used to remove the PM contained in the exhaust gas mainly composed of SOF and ISF. A part of the exhaust gas is divided into a branch portion as EGR gas, and the EGR gas is returned to the intake air of the engine through the EGR pipe and the EGR valve connected to the branch portion.

Description

technical field [0001] The present invention relates to the removal of carbon-based particulate matter (Particulate Matter: hereinafter referred to as "PM") and nitrogen oxides (hereinafter referred to as "NO") contained in the exhaust gas of marine diesel engines. x ") and other harmful gases and purification of exhaust gas, especially the exhaust gas treatment technology of large displacement marine diesel engines that use low-quality fuel below heavy oil. It is an exhaust gas purification device using corona discharge in a large-displacement diesel engine. Background technique [0002] Diesel engines are widely used as power sources for various ships, generators, large-scale construction machinery, and various automobiles. However, the PM and NOx contained in the exhaust gas discharged from the diesel engines are well known, and not only the atmosphere pollution, but also extremely harmful substances to the human body, so the purification of the exhaust gas is extremely ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N3/01F01N3/02F02M26/02F02M26/22
CPCF01N3/005F01N3/01F01N3/02F01N3/0205F01N3/04F01N13/004F01N2240/04F01N2240/22F01N2250/10F01N2260/06F01N2590/02F01N13/009F02M26/00F02M26/15F02M26/23F02M26/35Y02T10/12
Inventor 古坚宗胜牧野义泷川一仪
Owner USUI KOKUSAI SANGYO KAISHA LTD
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