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Exhaust Gas Scrubber and Caustic Soda Safety

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[MARITIME TRAINING SERVICES INC.] [In case of any conflict between the requirements shown in the movie and the company's safety management system (SMS), please follow the company's SMS requirements] [EXHAUST GAS SCRUBBER AND CAUSTIC SODA SAFETY] Commercial shipping is one of the most environmentally friendly modes of transportation and is far more efficient than road and air transport. Even with a high level of efficiency, companies are looking at new and innovative ways to reduce their environmental footprint. The exhaust gas scrubber is one example of how some companies are complying with regulations and working to lessen their impact on the environment. In this program, we'll be answering the following questions: [CHAPTER 1 WHY AN EXHAUST GAS SCRUBBER (EGS)?] Why are exhaust gas scrubbers used? [CHAPTER 2 HOW AN EXHAUST GAS SCRUBBER WORKS] What is an exhaust gas scrubber and how does it work? [CHAPTER 3 EGS AND CAUSTIC SODA SAFETY] What is caustic soda and how do you handle caustic soda safely? [CHAPTER 1 WHY AN EXHAUST GAS SCRUBBER (EGS)?] Marine environmental regulations like U.S. Clean Air Act and MARPOL have prompted the shipping industry to investigate and adopt many new ship board technologies. The Clean Air Act was designed to control air pollution on a national level. It incorporates regulation for emissions from marine compression ignition engines. On January 1, 2015, the International Maritime Organization [Emission Control Area (ECA)] reduced the limit on the amount of sulfur oxide and particulate matter [SOx and particulate matter reduced to 0.1%] that can be released in emission controlled areas to 0.1%. In order to comply with these new ECA zone regulations, there are three main options. One, burn diesel oil with a sulfur content of less than 0.1%. Two, use alternative non-sulfur fuel like LNG. Or three, install an exhaust gas scrubber, or EGS, system. Many companies are choosing exhaust gas scrubbers because they do not require new engines or other major modifications and they have many other clean air benefits in addition to eliminating sulfur pollutants. [CHAPTER 2 HOW AN EXHAUST GAS SCRUBBER WORKS] So what exactly is an exhaust gas scrubber and how does it work? An EGS is an air pollution control device that is used to eliminate either particles or gasses or sometimes both from industrial exhaust streams. [THE 3 TYPES OF EXHAUST GAS SCRUBBERS (EGS)] There are three types of exhaust gas scrubbers: [OPEN LOOP, CLOSED LOOP, HYBRID] Open loop, Closed loop and Hybrid. An open loop EGS uses seawater to neutralize the acidic affluent from the scrubber. A closed loop EGS uses a reagent such as caustic soda to neutralize the acidic affluent from the scrubber. A hybrid EGS can use either sea water or caustic soda. Exhaust gas scrubbers operate much like a car exhaust system. As the engine operates, it creates exhaust. Historically, this exhaust went directly into the atmosphere. With an EGS, sulfur oxide particulate matter and other pollutants are removed as the exhaust passes through the scrubber tower by means of a water spray manifold inside the tower. Water mixes with the gasses and removes the unwanted pollutants. During this process, the pH of water decreases and becomes acidic. To neutralize the pH, caustic soda is added directly into a recirculation tank. This automated system maintains a neutral pH of around 7. The mixed water, or effluent, that remains is sent to a treatment unit which removes the majority of pollutants. The treated effluent is passed through a series of sensors and if the water meets the proper criteria, it is discharged overboard. [CHAPTER 3 EGS AND CAUSTIC SODA SAFETY] In this chapter we'll explain what caustic soda is, how to handle it safely and what procedure should be followed in case of exposure, spill or a fire. What is caustic soda? Caustic soda, more formally known as sodium hydroxide, is a highly basic compound. It is stored and pumped through the engine room to neutralize the scrubber wash water. You might remember from chemistry class that pH is a numeric scale from 0 to 14. 0 is very acidic and 14 is very basic. We all tend to think of acids like battery acid, lemon juice and vinegar as burning substances but bases like bleach, ammonia and drain cleaner can be just as dangerous. Caustic soda is used in many industrial applications ranging from paper manufacturing to toothpaste. It is manufactured alone with chlorine through a process of electrolysis of sodium chloride which is more commonly referred to as rock salt. So, why is caustic soda dangerous? Like any other extreme acid or base, caustic soda digests organic tissue. If you have ever rubbed lye soap in your hands and have felt that soapy feeling, you are feeling tissue dissolve on a smaller scale. Getting caustic soda on your skin feels much the same way. It is essential that all proper safety precautions are taken whenever you are dealing with caustic soda or an associated system to ensure the safety of all personnel that may come into contact. Caustic soda is odorless and looks very much like water. The only way to tell the difference is through testing with pH paper. Never assume a standing clear liquid near the caustic filling, piping, or storage system is water. Always test with pH paper. Be aware of caustic handling areas or areas in which residue may be present. Caustic soda leaves a white residue that is just as dangerous as the liquid form. It can be inhaled or picked up on clothing. Always ensure handling equipment such as fittings, couplers, adapters and tools are of proper design for handling caustic soda. Prior to transfer, all equipment should be inspected. Pay attention to caustic soda markings on tanks and piping. On piping, the marking is yellow with a green stripe. Tanks will be marked with caustic soda or with a DOT corrosive class 8 placard noting . All personnel must wear the proper personal protective equipment when handling caustic soda or when working on a part of the system that contains caustic soda. Persons handling caustic soda must always wear close fitting chemical safety goggles and chemical resistant gloves. Additional clothing and equipment may be required depending on the job. These options may include: hardhat, full face shield in addition to chemical worker safety goggles, chemical resistant boots, chemical protective suit both jacket and pants. The jacket should be buttoned up to the neck, the trousers worn outside the boots and shirt sleeves are sealed or sleeves worn over the gloves as determined necessary. Workers should be thoroughly trained regarding the hazards of caustic soda before starting any work involving the material such as unloading, storage, transferring, production, maintenance, or lab testing. All such activity should be carefully planned in advance and all planned procedures must be carefully followed. All personnel must take the following safety precautions when transferring caustic soda. Properly check safety equipment such as placement and operation of safety showers. Ensure that barriers like cones and caution tape are placed properly so people are not able to enter active handling areas. Check hoses prior to transfer and ensure that communication is maintained throughout the entire process. Next, we'll provide information about First Aid procedures you must follow if you are exposed to caustic soda. Time is critical when dealing with any type of exposure to caustic soda. You must begin to flush the area with water as soon as possible. Any time loss prior to such washing could cause serious and irreparable damage. Outside medical assistance should be consulted as soon as possible. Skin exposure to caustic soda does not cause immediate pain but it can cause immediate damage. Even brief contact may cause marked irritation or a chemical burn. If caustic soda is exposed to skin, you must flush immediately with water from a safety shower. Remove your clothing while showering. If your eyes have not been exposed, do not remove your goggles until your head and hair have been thoroughly rinsed otherwise caustic soda could be washed into your eyes. Rinse your head thoroughly and then remove the goggles and complete washing. [DO NOT USE SOAP OR NEUTRALIZE WITH CHEMICALS] Do not use soap and do not attempt to neutralize the caustic soda with chemicals. In order to ensure all caustic soda is removed, it is important to flush with water for 30 minutes or until you are advised to stop by outside medical personnel. Exposure to eyes can be more serious. Contact for only a few seconds can cause permanent damage and even blindness. For personnel wearing prescription eyeglasses, two additional layers of eye protection, goggles and face shield will still be required. [NO CONTACT LENSES] Contact lenses should not be worn whenever working on or around the caustic system. Eyewash fountains are located near any caustic soda handling area and safety showers should be located directly above the eyewash fountains. Flush your eyes immediately with water under low pressure from an eyewash fountain. After hands have been thoroughly rinsed, hold the eyelids open and continue washing for 30 minutes or until advised otherwise by outside medical personnel. [DO NOT induce vomiting] If caustic soda is ingested, do not induce vomiting. Immediately drink at least 8 ounces, 1 cup of water or milk, and call medical personnel. Do not give anything by mouth to an unconscious person. If mists of caustic soda are inhaled, immediately remove the victim from the contaminated area and bring them to an area with fresh air. Then, call medical personnel. If the victim is not breathing, give artificial respiration. If breathing is difficult, oxygen should be administered by qualified personnel. Wash contaminated clothing before reuse. Properly dispose of leather items such as shoes, belts, and watch bands. Never clean up a spill without proper PPE. This cannot be stressed enough. When cleaning small spills in a contained area, follow these steps; [Don proper PPE compatible for sodium hydroxide.] One, don proper PPE compatible for sodium hydroxide. [Neutralize with weak acetic acid, or use absorbent materials as needed, available onboard the vessel.] Two, neutralize with weak acetic acid, or use absorbent materials as needed, available onboard the vessel. [Properly dispose of material in marked containers.] Three, properly dispose of material in marked containers. When cleaning large spills in a contained area, follow these steps: [Don proper PPE compatible for sodium hydroxide.] One, don proper PPE compatible for sodium hydroxide. [If possible, verify pH level. Neutralize with weak acetic acid, dry base neutralizer available onboard the vessel.] Two, if possible, verify pH level. Neutralize with weak acetic acid, dry base neutralizer available onboard the vessel. [Transfer as much as possible to secure, properly labeled containers for disposal. The equipment used must be compatible with caustic soda.] Three, transfer as much as possible to secure, properly labeled containers for disposal. The equipment used must be compatible with caustic soda. When cleaning spills in uncontained areas like soil or gravel, follow these steps. [Don proper PPE compatible for sodium hydroxide.] One, don proper PPE compatible for sodium hydroxide. [Stop leak if you can without risk, and ELIMINATE all ignition sources in immediate area. Contain the spill and ensure dock or facility is notified of the issue.] Two, stop leak if you can without risk, and eliminate all ignition sources in immediate area. Contain the spill and ensure dock or facility is notified of the issue. [Use absorbent materials or dry base neutralizer as needed, available onboard the vessel. Dig up contaminated soil or gravel for disposal.] Three, use absorbent materials or dry base neutralizer as needed, available onboard the vessel. Dig up contaminated soil or gravel for disposal. [Transfer as much as possible to secure, properly labeled containers. The equipment used must be compatible with caustic soda.] Four, transfer as much as possible to secure, properly labeled containers. The equipment used must be compatible with caustic soda. Always follow all regulations governing disposal. Never discharge waste caustics in sewers or streams. Releases or spills of caustic soda to the environment may trigger reporting requirements to federal, state, provincial and local authorities. It is also important to discuss fire safety relating to caustic soda. While caustic soda is not flammable, it is important to keep the following important items in mind. [If caustic soda is introduced to water, a thermolytic, or rapid heating reaction occurs] If caustic soda is introduced to water, a thermolytic, or rapid heating reaction occurs. [Caustic soda will produce poisonous gas if turned to vapor] Caustic soda will produce poisonous gas if turned to vapor. [Cooling caustic storage tanks during a fire may be necessary] Cooling caustic storage tanks during a fire may be necessary. [Any caustic soda tank cut-outs should be secured to ensure the tank is isolated] Any caustic soda tank cut-outs should be secured to ensure the tank is isolated. [If there is any doubt whether caustic soda has been released or mixed with water during an emergency response, pH testing needs to be conducted] If there is any doubt whether caustic soda has been released or mixed with water during an emergency response, pH testing needs to be conducted. [Any outside firefighters coming on a scene must be made aware of the presence of caustic soda within the engine room] Any outside firefighters coming on a scene must be made aware of the presence of caustic soda within the engine room Exhaust gas scrubbers allow many companies to further reduce their environmental footprint and comply with future regulations. Crew members must remain diligent and aware of all safety precautions while serving aboard a vessel with a closed loop or hybrid EGS. And those handling caustic soda must always remain vigilant.

Video Details

Duration: 14 minutes and 29 seconds
Country: Andorra
Language: English
License: Dotsub - Standard License
Genre: None
Views: 10
Posted by: maritimetraining on Mar 27, 2018

Exhaust Gas Scrubber and Caustic Soda Safety

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