Langh Ship Develops Exhaust Gas Scrubber

MarineLink.com
Thursday, October 03, 2013
MS Laura

Although the sulphur limit for ship fuel in the North Sea and Baltic Sea is 1%, Langh Ship’s m/s Laura sails in the area with whatever fuel the charterer has found in Rotterdam, no matter how high its sulphur content. This is possible because the shipping company has equipped the vessel with a closed loop scrubber that emits exhaust gas that is even cleaner than if the fuel had a sulphur content of no more than 0.1%.

Environmental regulations in this sulphur emission control area (SECA) have been tightened such that the sulphur limit for fuel will drop to 0.1% at the start of 2015. “In practice, this means that ships will have to switch to diesel, i.e. marine gas oil (MGO), unless they are equipped with exhaust scrubbers,” explains the shipping company’s Managing Director, Hans Langh. The difference in price between MGO and the low sulphur heavy fuel oil currently being used in the area is more than 300 USD per tonne, bringing a major increase in shipping costs.

Hans Langh says the company started looking into various options early on: “We requested quotations on scrubbers, but the offers we were getting were just too high to seriously consider installing them in used vessels.”

The challenge in installing exhaust scrubbers in ships, especially when it comes to retrofitting, is the lack of space. Another problem appeared to be cleaning of the emission washing water used in the scrubber.

Genuine closed loop system
Legislation allows the use of seawater in scrubbers such that instead of emission impurities being released into the air, they are discharged into the sea (i.e. open loop scrubber). “For us, however, it was important that our scrubber be based on a closed loop system, whereby the requirement is for the washing waters used in the process to be cleaned so as to separate the harmful substances,” explains Reino Verosaari, Langh Ship’s Senior Technical Adviser.

Hans Langh has extensive expertise in water treatment, as another of his family-owned companies – Industrial and Ship Cleaning Services Hans Langh – has 40 years’ experience in cleaning washing waters. This expertise served as the foundation when the company set off to develop a scrubber and washing water processing system for its ship.

And the development work paid off: while m/s Laura was docked in May, a scrubber was installed in the vessel and test runs have been carried out since then. And, upon being granted special permission from the Finnish Transport Safety Agency Trafi, high sulphur fuels have been tested, too. The results are encouraging: the exhaust gas is cleaned in line with the requirements of the upcoming regulations, and the washing waters used in the method are also cleaned. In addition, the cleaning system removes particulates from the exhaust gas, even though this is not required by legislation. The system is protected by multiple patent applications.

“We would never have been able to accomplish this without the participation of Tekes, the Finnish Funding Agency for Technology and Innovation. We put in a tremendous amount of effort into conducting research and developing and testing methods, and the support and funding we received from Tekes was crucial in that respect,” says Langh. After first building a small-scale model of the scrubber and conducting the ship’s exhaust gases to it, the cleaning of the washing water was tested using various methods. The project was started up in 2012, and now the results are in.

The scrubber is literally out of sight
“Our goal was to create a scrubber that would change the ship’s properties as little as possible and barely affect its cargo capacity,” explains Langh Ship’s Commercial Manager, Laura Langh-Lagerlöf, who was highly involved in the development team. “And on m/s Laura, we really hit the nail on the head – you can’t even see the scrubber from the outside.”

Since the scrubber does not result in any new projections from the ship, nor does the vessel’s centre of gravity change as a result of the scrubber, its sailing characteristics remain the same. The efficiency of the installation is further increased by the fact that the increase in weight is very small. The washing water cleaning system additionally ensures that on board storage of the waste destined for land does not actually reduce the vessel’s cargo capacity.

Langh Ship is planning to install scrubbers in its four other vessels. The method will also be made available to others: “This has been such a success that we believe others may be interested in it too,” says a pleased Langh-Lagerlöf.

langhship.fi/en
 

Maritime Reporter June 2014 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Environmental

There’s Still Time for SHIPPINGInsight Award Entries

Entry submissions for the first SHIPPINGInsight Award are due Friday, Aug. 1, but organizers said they will continue to accept nominations through following week to provide some extra time.

MOL Ship Management Earns Energy/Enviromental Certifications

First company to receive ISO50001 certification from Nihon Kaiji Kyokai.   MOL Ship Management Co., Ltd. (MOLSHIP), a core ship management company in the corporate group headed by Mitsui O.

Pumps Reach Sinking Shrimper Just in Time

A commercial fishing vessel from Brownsville is slowly making its way back to port, thanks to some quick actions by its crew and Coast Guard units, informs the US Coastguard,

Marine Power

There’s Still Time for SHIPPINGInsight Award Entries

Entry submissions for the first SHIPPINGInsight Award are due Friday, Aug. 1, but organizers said they will continue to accept nominations through following week to provide some extra time.

Burger Boat to Build New Passenger Vessel

Burger Boat Company announced that it has received a contract for the construction of an 89-foot (27-meter) steel passenger vessel for Wendella Sightseeing Company, Chicago, Ill.

Joint Project Studies Condition-based Engine Monitoring

Classification society ClassNK announced that it will participate in a joint project together with Mitsui Engineering & Shipbuilding Co., Ltd. and MES Technoservice Co.

News

Exxon Mobil Corporation Declares 3Q Dividend

The Board of Directors of Exxon Mobil Corporation yesterday declared a cash dividend of 69 cents per share on the Common Stock, payable on September 10, 2014 to

FortisBC Set to Expand its Tilbury LNG Facility

FortisBC Energy Inc. today selected Bechtel Canada Co. (Bechtel) as the contractor for its Tilbury LNG Facility Expansion Project in Delta, B.C. (Project). The

Port Manatee's 3 projects to get underway

Port Manatee has been awarded a $1,837,500 security grant, allowing the port to proceed with three significant projects. The award, the second-highest for any

Marine Equipment

Total E&P is First to Use FROG-XT4

Total E&P is the first to use Reflex Marine’s newly developed FROG-XT4 on the Odudu field in Nigeria. The French operator purchased the crew transfer device

Joint Project Studies Condition-based Engine Monitoring

Classification society ClassNK announced that it will participate in a joint project together with Mitsui Engineering & Shipbuilding Co., Ltd. and MES Technoservice Co.

DNV Type Approved Anchor Winch for the Arctic Prowler

JK Fabrication has landed DNV certification for its 40-30-3000-DNV series Anchor Winch. Culminating a two-year process, JK’s C-series winch was at last awarded

 
 
Maritime Careers / Shipboard Positions Maritime Security Maritime Standards Pipelines Port Authority Salvage Ship Electronics Ship Repair Ship Simulators Sonar
rss | archive | history | articles | privacy | terms and conditions | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.2206 sec (5 req/sec)