Method, apparatus, and system used for purifying and silencing exhaust of internal combustion engine

Abstract

A method for purifying and muffling exhaust gas from an internal combustion engine, comprising the following steps: 1) allowing exhaust gas discharged by the internal combustion engine to enter into the interior of a housing (6) via an exhaust gas inlet (7) of the housing (6), wherein abrupt expansion of cross section occurs from the exhaust gas inlet (7) to the interior of the housing (6); 2) allowing scrubbing water which can absorb SO₂ to enter via a scrubbing water inlet (11), and allowing the exhaust gas in the interior of the housing and the scrubbing water to come into contact with each other, then discharging the scrubbing water via a scrubbing water outlet (12) of the housing; and 3) discharging the exhaust gas via an exhaust gas outlet (10) of the housing. The method simultaneously produces effects of purifying SO₂, muffling and saving energy, and eliminates sparks in the exhaust gas. A device and system for purifying and muffling exhaust gas from an internal combustion engine are also provided.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a method for purifying and muffling exhaust gas from an internal combustion engine and, in particular, to a method of purifying sulfur dioxide (SO2) in the exhaust gas or purifying sulfur dioxide (SO2) and nitrogen oxides (NOx) synchronously while highly efficiently and safely decreasing the noise of the exhaust gas from the internal combustion engine. The invention also relates to a device and system for purifying and muffling exhaust gas from an internal combustion engine. The method, device and system provided by the invention are especially suitable for, but not limited to, offshore platforms such as vessels, drillings and floating factories, etc.DESCRIPTION OF THE PRIOR ART[0002]Modern large and medium sized diesel engines, especially two-stroke diesel engines with poor ventilation conditions, often produce sparks from chimneys, usually called the flaming chimney. The flaming chimney effect of a diesel engine is usual...

AI Technical Summary

Benefits of technology

[0063]The method of the present invention is able to replace or partially replace the existing residual heat recovery process, can release or reduce the space required by the original residual heat recovery process, so that the SCR device can be located in the original position of the waste heat recove

Problems solved by technology

Modern large and medium sized diesel engines, especially two-stroke diesel engines with poor ventilation conditions, often produce sparks from chimneys, usually called the flaming chimney.

Marine diesel engine flaming chimney will not only result in a fire but also endanger the safety of oil tankers.

The problem is that the process and structure of the existing muffler not only has poor muffling effect, but also does not reduce the temperature of the hot fuel gas, so that sparks are not completely extinguished, which is always a security risk of the oil tanker.

The applicant found that during the implementation of the invention, due to space constraints of the existing vessel structure, it is hard to implement the invention on an existing vessel.

Current vessels barely have sulfur oxides cleaning device installed thereon, on one hand this is because the international legislation on limitation of internal combustion engine sulfur oxides emissions has only progressively introduced from 2005, and on the other hand, this is also due to space limitations in the existing vessels' structures, so that it is almost impossible to install sulfur oxides cleaning devices that need to occupy a larger space.

Both of the cleaner and seawater processor require larger space.

The arrangement of the seawater processer is rather flexible, while the exhaust gas cleaner must be disposed in the exhaust passage of the internal combustion engine, and therefore a larger residual space is needed in the exhaust passage of the internal combust

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