작성일 2019-09-09 조회수 3504



Booth No. 4M25

ANDRITZ is an international technology group providing plants, systems, equipment, and services for various industries. The company is one of the technology and global market leaders in the hydropower business, the pulp and paper industry, the metal working and steel industries, and in solid/liquid separation in the municipal and industrial segments. Other important fields of business are animal feed and biomass pelleting, as well as automation, where ANDRITZ offers a wide range of innovative products and services in the IIoT (Industrial Internet of Things) sector under the brand name of Metris. In addition, the company is active in power generation (steam boiler plants, biomass power plants, recovery boilers, and gasification plants) and environmental technology (flue gas and exhaust gas cleaning plants) and offers equipment for the production of nonwovens, dissolving pulp, and panelboard, as well as recycling plants.

ANDRITZ stands for passion, partnership, perspectives and versatility – core values to which the company is committed. The listed Group is headquartered in Graz, Austria. With almost 170 years of experience, approximately 29,600 employees, and more than 280 locations in over 40 countries worldwide, ANDRITZ is a reliable and competent partner and helps its customers to achieve their corporate and sustainability goals.

ANDRITZ is a leading global supplier of innovative flue and exhaust gas cleaning technologies. The product range combines 35+ years’ experience with the specific knowledge gained from hundreds of installations worldwide.



Air pollution causes discomfort or harm to human beings and other living organisms. It is our mission to prevent air pollution caused by shipping fleets, power generation, and industrial processes. Thanks to our broad portfolio of air pollution control technologies and extensive experience from completed projects, ANDRITZ is able to handle any challenge your project may entail. Our product portfolio ranges from flue gas scrubbers (wet and dry), dust and soot separation, to SCR/DeNOx systems and complex flue gas cleaning equipment for waste-to-energy and industrial plants.



The ANDRITZ SeaSOx technology is the right answer to meet the new requirements and can be installed on all types of maritime vessels on either a new build or retrofit basis thanks to its flexibility.


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SeaSOxwet (wet scrubbing), using seawater as absorbent and suitable for open, closed or hybrid mode, for commercial vessels operating in international waters.



In open loop mode, seawater is used as a washing medium to clean the exhaust gas. This simple process makes use of the natural alkalinity of the seawater in chemical absorption of the SOx. For this reason, the washing medium is pumped from sea chests to the absorber, where the absorption process takes place by means of spray scrubbing. The treated exhaust gas can then be released to the environment, and the effluent is also discharged. Both the exhaust gas and the effluent have to meet several critical, environmental constraints, which are validated by continuous emission monitoring.



If the natural alkalinity is too low or discharging of effluent is not allowed, SOx scrubbing is performed in closed-loop mode. In this mode, the washing medium is recycled, and a neutralizing agent (50% wt. NaOH, Na2CO3) is added in metered doses to obtain a certain absorption capacity. In order to control the absorption temperature and maintain the water balance, an inline heat exchanger is provided on request to cool the washing medium down. Consequently, the effluent has to be cleaned periodically depending on the engine load, the ship’s route, and its fuel specification. For this application, a washing water treatment unit is installed to separate the particles and salts from the washing medium, in accordance with the MARPOL Convention, before it is discharged into the sea. The sludge generated is collected in a separate tank, while the treated washing water is either stored in the holding tank or discharged into the sea, depending on local discharging restrictions.



A combination of open- and closed-loop operations is called hybrid mode. In hybrid mode, it is possible to switch between these two processes depending on the predominant basic conditions (seawater alkalinity, discharge restrictions, etc.). This option provides high flexibility and enables customers to choose the best process, both economically and technically.





• Simple and robust design suitable for I-type (inline) and U-type (bypass) installation

• Substantial noise reduction

Patented FGDplus layer guarantees highest SO2 removal and a surplus in particulate removal

• Exhaust gas can pass through I-type scrubbers safely, even when the absorber pumps are not operating.

• Highest removal efficiencies with lowest operating costs

• Multiple inlets possible

• Smallest footprint of I-type scrubbers due to rectangular design

• U-type scrubber can be designed as open spray tower with small footprint or as packed tower with low energy consumption


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SeaSOxdry (dry scrubbing), using sodium bicarbonate powder as absorbent, for commercial vessels operating in coastal waters and inland waterways.

In the dry desulphurization process, sodium bicarbonate (NaHCO3) is injected as a dry powder into the existing exhaust pipe. Due to the prevailing high temperature and adequate residence time, the NaHCO3 particle is activated, which increases the reactive surface by many times. This activation is necessary for the NaHCO3 to react with the sulfur components. Such a process requires a temperature of at least 150°C. If the temperature of the exhaust gas stream from the engines is higher than 250°C, a quench is connected upstream, which brings the exhaust gas to the desired temperature by means of evaporative cooling. At the downstream dust filter, on which other particles (e.g. dust, soot ...) are also deposited in addition to the sodium bicarbonate, a filter cake builds up on the filter cloth, and this is where the decisive chemical reaction takes place. SO2 reacts with NaHCO3 to form Na2SO4, which is also present as a powder. After a defined period of time or due to the maximum allowed pressure loss, the dust filter is cleaned by means of a pulse-jet process. During operation, a short stream of air is introduced at high pressure into the bag filter, whereby the filter cake peels off and drops into a collecting funnel. From there, the product is carried off by compressed air and stored in a silo.




• SO2 removal down to 0.1% or 0.5% S possible

• Low pressure drop (< 15 mbar)

• No wash water discharge into the sea

• No plume due to high temperature of exhaust gas

• No harmful sorbents

• Additional removal of particulates down to emission values of < 10 mg/m³ (std.,dry) can be guaranteed; 90% removal of fine particulates (< 1 µm)

• No need to install pumps, wastewater treatment equipment, heat exchangers, filters, or tanks in the engine room

• Multiple inlets possible


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In-house specialists at ANDRITZ AUTOMATION provide a complete control system for ANDRITZ SeaSOx applications, individually tailored to the specific characteristics of each vessel and able to communicate with the vessel's main, higher-level control systems, also if installed as an upgrade.

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다음글 (WISKA) Developed to meet shipyards and shipowners demands