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Method for cleaning liquid effluents of a wet scrubber treating exhaust fumes emitted by a diesel engine

A technology of wet scrubbers and scrubbers, applied in chemical instruments and methods, using liquid separation agents, separation methods, etc., can solve problems such as difficult to use ships, need maintenance, and high cost of rotating machines

Active Publication Date: 2019-06-14
LAB PLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, activated carbon has a low density difference compared to water, even as dense as seawater, which means that only efficient solid-liquid separation would need to rely on filters or centrifuges
However, as already pointed out, relying on filters is bound to result in very slow filtering
For centrifuges, such rotating machines are expensive, require maintenance and are difficult to use on ships

Method used

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  • Method for cleaning liquid effluents of a wet scrubber treating exhaust fumes emitted by a diesel engine
  • Method for cleaning liquid effluents of a wet scrubber treating exhaust fumes emitted by a diesel engine
  • Method for cleaning liquid effluents of a wet scrubber treating exhaust fumes emitted by a diesel engine

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Embodiment Construction

[0013] figure 1 A device for realizing the treatment of exhaust gas 1 emitted by a diesel engine E is illustrated. According to a preferred but non-limiting context of use, the engine E ensures the propulsion of the sea vessel on which it is installed. In all cases, engine E runs on fuel containing sulfur, especially fuel oil, and as a result, in addition to carbon (CO 2 ), water vapor (H 2 O), nitrogen (N 2 ) and oxygen (O 2 ) and other main components, flue gas 1 also contains sulfur oxides, especially sulfur dioxide (SO 2 ). Flue gas 1 also contains nitrogen oxides (NO x ), and organic compounds generated by combustion inside the engine E. These organic compounds include: inter alia soot, tars, oils (especially in aerosol form), aromatic hydrocarbons (such as PAH), aromatic organochlorine compounds (such as PCBs), dioxins and furans (such as PCDD / F), and other inorganic compounds.

[0014] The plant comprises two functional units, a wet scrubber WS, which treats th...

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Abstract

For simple, compact and economical cleaning of liquid effluents (4) from a wet scrubber (WS) treating exhaust fumes (1) emitted by a diesel engine (E), the invention provides that: - solid particles (7), containing between 25 and 75 % by weight of activated carbon and between 25 and 60 % by weight of cement and having a mean size of between 30 [um]m and 500 [um]m, are placed in the scrubber (WS),and - the effluents to be cleaned (4), on leaving the scrubber (WS), are sent to a solid-liquid separator (SLS) where the effluents are separated into a clear fraction (5) and a sludge (6) containingthe solid particles (7).

Description

【Technical field】 [0001] The present invention relates to a method for cleaning liquid effluent from a wet scrubber treating exhaust gases emitted by diesel engines, in particular by diesel engines of marine vessels. 【Background technique】 [0002] Sea vessels, whether ferries or other vessels, mostly use fuel oil as fuel for the diesel engines that ensure their propulsion. This fuel contains up to 5% by weight of sulfur, most often between 0.5% and 3.5% by weight. During the combustion process in these engines, this sulfur is converted to sulfur dioxide (SO 2 ). As a result, the exhaust gases of these engines are acidic and harmful. Ships must therefore have integrated means to reduce sulfur dioxide emissions from these exhaust gases before they are released into the atmosphere, unless very low sulfur fuels are used, however, this makes the cost much higher. [0003] The most frequently proposed technique for capturing the sulfur dioxide contained in exhaust gases on bo...

Claims

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Application Information

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IPC IPC(8): B01D53/14B01D53/92B01D21/26B01D47/06
CPCB01D21/267B01D47/00B01D53/1487B01D53/1493B01D53/92B01D2247/04B01D2251/304B01D2251/402B01D2251/404B01D2251/606B01D2253/102B01D2253/304B01D2257/702B01D2257/7027B01D2258/012B01D2259/126B01D2259/4566
Inventor 伯纳德·锡雷弗兰克·塔巴里
Owner LAB PLC
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