System and method for reducing the amount of sulfur oxides in exhaust gas

Abstract

The present application relates to a spray tower (1) arranged to be vertically positioned and having an inner space (100), wherein the spray tower comprises, a central exhaust gas pipe (7) arranged for introducing exhaust gas into the inner space of the spray tower through an exhaust gas inlet (2) positioned at a proximal end (7a) of the central exhaust gas pipe, the central exhaust gas pipe beingpositioned at a bottom end (1a) of the spray tower in installed position, the central exhaust gas pipe being in fluid connection with the inner space of the spray tower through an exhaust gas inlet (2) at a top end of the central exhaust gas pipe, and at least one exhaust gas outlet (3 arranged for withdrawing purified exhaust gas from the inner space of the spray tower, the exhaust gas outlet being positioned at a top end (1b) of the spray tower in installed position, the exhaust gas outlet being in fluid connection with the inner space of the spray tower, wherein from the exhaust gas inletto the exhaust gas outlet, a general exhaust gas flow is passing through the inner space of the spray tower, one or more spray devices (41, 42) configured to provide a stream of scrubber liquid withinthe inner space of the spray tower counter current to the general exhaust gas flow, and at least two engine exhaust gas pipes (6) being in fluid connection with the distal end (7b) of the central exhaust gas pipe. Furthermore, a method for reducing the amount of SOx in exhaust gas is described.

Description

technical field [0001] The present application relates to the technical field of exhaust gas purification. More specifically, this application relates to the reduction of sulfur oxides (SO x ) content to purify the exhaust gas of the ship. Background technique [0002] Fossil fuels are burned for many different purposes in industrial processes. Unfortunately, the combustion of fossil fuels produces several pollutants that have been found to be harmful to the environment. In particular, sulfur oxides and nitrogen oxides are major components of "acid rain". Sulfur is a naturally occurring element in crude oil that is concentrated in residual components of the crude oil distillation process. The amount of sulfur in fuel oil depends mainly on the origin of the crude oil and to a lesser extent on the refining process. Typically, this value is around 1.5-4% w / w for fuels on a global scale. These values ​​lead to high concentrations of SO in the flue gas 2 . For example, wh...

AI Technical Summary

Problems solved by technology

[0011] It is emphasized that while scrubber technologies are known to be suitable for land-based installations, these technologies are not always suitable for marine applications because size, weight, robustness, stability, flow and exhaust gas composition are based on sea and land Parameters that are not automatically interchangeable between scrubber systems

[0012] The purpose of the present application is to provide a scrubbing system that does not create high back pressure on the engine, while allowing multiple engine exhaust pipes to be connected to the scrubber in a simple manner and requiring a limited amount of space

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