Your SlideShare is downloading. ×

MARPOL Annex I and Oily Water Separator

2,781

Published on

MARPOL Annex I and Oily Water Separator by Mohd. Hanif Dewan, Senior Engg. Lecturer, International Maritime Academy, Bnagladesh.

MARPOL Annex I and Oily Water Separator by Mohd. Hanif Dewan, Senior Engg. Lecturer, International Maritime Academy, Bnagladesh.

Published in: Education, Technology, Business
5 Comments
8 Likes
Statistics
Notes
  • may you please send for me a download link, regards
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
  • thanks for your usefull slides
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
  • Hi dear sir
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
  • dear sir , thank you for your slides. i have gone through the slides.i am rafiqul islam (40th batch) attending coc class 2 oral exam in singapore. Here examiner asked about the ows. 2nd stage 2 sensors which are connected to the 1st stage probe and with the control box.The examiner wanted to know the function of the two sensors in 2nd stage. but i dont know the answer. please advise...
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
  • it's good collection of knowledge sir. Thank you sir. I ll b more glad if u let me provide the chance of knowing more things...
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
No Downloads
Views
Total Views
2,781
On Slideshare
0
From Embeds
0
Number of Embeds
8
Actions
Shares
0
Downloads
0
Comments
5
Likes
8
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. OILY WATER SEPARATOR 16 June 20141 Mohd. Hanif Dewan, Chief Engineer and Maritime Lecturer & Trainer, Bangladesh
  • 2. Oily Water Separators 16 June 20142 Principles of Environmental Protection (Marpol 73/78 Annex 1)  Minimising Generation of oil water mixtures  Separating oil from water where mixture occur  Carrying oil in spaces protected from direct impact by stranding or collision  Instituting special areas and prohibited coastal areas  Setting limits on quantities which may be discharged into the sea. Mohd. Hanif Dewan, Chief Engineer and Maritime Lecturer &Trainer, Bangladesh
  • 3. 16 June 20143 However before we get into this subject we need to understand the Rules and Regulations that surround this equipment Can someone tell me what book we need to be looking into to find the rules and Regulations that govern the operation of an Oily Water Separator? MARPOL ANNEX 1: Prevention of pollution by oil Mohd. Hanif Dewan, Chief Engineer and Maritime Lecturer &Trainer, Bangladesh
  • 4. Lets have a look at the regulation in Chapter 3 (Requirements for machinery spaces of all ships) that immediately concern you. With reference to Oily Water Separators These being Regulation 14 Oil filtering equipment Regulation 15 Control of discharge of Oil Regulation 17 Oil Record Book Part I – Machinery space operations 16 June 20144 Mohd. Hanif Dewan, Chief Engineer and Maritime Lecturer &Trainer, Bangladesh
  • 5. Regulation 14: Oil Filtering Equipment A. Vessels above 400 GT and less than 1000 GT shall have an oil filtering equipment, - Approved by the Administration - Will ensure that any oily mixture discharged into the sea after passing through the equipment has an oil content not exceeding 15 ppm. B. Vessels above 1000 GT shall have an oil filtering equipment, - In addition to the above, shall be provided with alarm arrangements to indicate when the level cannot be maintained. - Also arrangements to ensure that any discharge of oily mixture is automatically stopped when the oil content of the effluent exceeds 15 ppm 16 June 2014 Mohd. Hanif Dewan, Chief Engineer and Maritime Lecturer &Trainer, Bangladesh5
  • 6. Regulation 15: Discharge from Machinery spaces: A. In special Areas : 1. The ship proceeding is en route 2. The oily mixture is processed through an oil filtering system 3. The oil content of the effluent without dilution does not exceed 15ppm. 4. When the vessel is in the special area the oil filtering system apart from having an alarm when the 15ppm cannot be maintained shall also be of a design where the oil filtering system shall stop automatically when the oil effluent exceeds 15ppm. 5. Oily mixtures do not originate from the cargo pump room bilges in case of oil tankers. 6. Oily mixtures in case of oil tankers is not mixed with oil cargo residues. 16 June 2014 Mohd. Hanif Dewan, Chief Engineer and Maritime Lecturer &Trainer, Bangladesh6
  • 7. B. Outside special Area’s (Regulation15): 1. The ship proceeding is en route 2. The oily mixture is processed through an oil filtering system 3. The oil content of the effluent without dilution does not exceed 15ppm. 4. Oily mixtures do not originate from the cargo pump room bilges in case of oil tankers 5. Oily mixtures in case of oil tankers is not mixed with oil cargo residues 16 June 2014 Mohd. Hanif Dewan, Chief Engineer and Maritime Lecturer &Trainer, Bangladesh7
  • 8. Regulation 17: ORB (PART 1) 1. Ballasting or Cleaning of fuel oil tanks 2. Discharge of dirty ballast or cleaning water from fuel oil tanks 3. Collection, Transfer and disposal of oil residues 4. Non automatic starting of discharge overboard, transfer or disposal otherwise of bilge water accumulated in machinery spaces 5. Automatic starting of discharge overboard, transfer or disposal otherwise of bilge water accumulated in machinery spaces 6. Condition of the oil filtering equipment 7. Accidental or other exceptional discharges of oil 8. Bunkering of fuel or bulk lubricating oil 9. Additional operational procedures and general remarks 16 June 2014 Mohd. Hanif Dewan, Chief Engineer and Maritime Lecturer &Trainer, Bangladesh8
  • 9. Regulation 29: Slop Tanks Oil tankers above 150 GT shall be provided with a slop tank arrangement having the following provisions, 1. Adequate means provided for cleaning of cargo tanks and transfer of dirty ballast residues and tank washing from cargo tanks to slop tanks 2. Slop tank arrangement should be such to allow the transfer or discharge of oily mixture in compliance with the discharge regulations 3. The slop tanks to have a capacity of min 3% of the total cargo carrying capacity of the vessel. Maybe reduced to 2 or 1.5% if such an amount is sufficient for carrying out tank cleaning operations without the introduction of additional water into the system 16 June 2014 Mohd. Hanif Dewan, Chief Engineer and Maritime Lecturer &Trainer, Bangladesh9
  • 10. Regulation 31: ODMCS Tankers above 150 GT shall be fitted with an ODMCS, 1. Must have a recording device to provide continuous record of the operation showing the ltrs/nm, total qty of oil disch, the oil content and the rate of discharge 2. Must be identifiable with date and time 3. Should come into operation when there is any discharge of effluents to the sea and should be capable of stopping the operation if the instantaneous rate of discharge exceeds 30 ltrs/nm 4. Failure to the system shall stop the operation 5. In case of failure, the system may be used on manual mode but the defect to be repaired as soon as possible. Vessel maybe allowed to undertake one ballast passage with the defective equipment 16 June 2014 Mohd. Hanif Dewan, Chief Engineer and Maritime Lecturer &Trainer, Bangladesh10
  • 11. Regulation 34 Control of Discharge of oil For OIL TANKER A. Outiside special areas 1. Vessel should not be in a special area 2. Vessel should be en route 3. Vessel should be atleast 50 miles from the nearest land 4. Any instantaneous discharge should not exceed more than 30 ltrs/nautical mile 5. Total oil residue discharge less than 1/15000 of the product carried for tankers built before 31 Dec 1979 6. Total oil residue discharged less than 1/30000 of the product carried for tankers built after 31 Dec 1979 7. The tanker has in operation an oil discharge monitoring and control system and a slop tank arrangement B. In Special Area(Regulation 34) 1. Any discharge into the sea of oil or oily residues from cargo spaces of an oil tanker is prohibited when in special area 16 June 2014 Mohd. Hanif Dewan, Chief Engineer and Maritime Lecturer &Trainer, Bangladesh11
  • 12. REGULATION 36: ORB (part 2) Part 2 is carried by the tankers and is for the cargo/ballast operations Entries: Loading of oil cargo Internal transfer of oil cargo while on voyage Discharging of oil cargo Ballasting of the cargo tanks and Ballasting of the dedicated clean ballast tanks Cleaning of cargo tanks including crude oil washing Discharge of ballast except from the segregated ballast tanks Discharge of water from the slop tanks Closing of all applicable valves after slop tanks have been discharged Closing of valves for isolation of dedicated clean ballast tanks from cargo and stripping lines after slop tank discharge operations Disposal of residues Accidental discharge of any oil content and the reasons for the same Conditions of the oil discharge monitoring system and the failures of the same to be recorded too. All the entries made need to be signed by the responsible officer along with the date and to be counter signed by the master. This record book needs to be maintained onboard for 3 years. 16 June 2014 Mohd. Hanif Dewan, Chief Engineer and Maritime Lecturer &Trainer, Bangladesh12
  • 13. Regulation 37:SOPEP 1. Every oil tanker more than 150 gt and ship other than a tanker more than 400 gt shall carry and shipboard oil pollution emergency plan 2. Procedures to be followed by the master or other persons having the charge of the ship to report an oil pollution incident 3. List of authorities or persons to be contacted in event of any oil spill/pollution incident 4. Detailed description of the actions to be taken to reduce or control the discharge of oil following the incident 5. Procedures and point of contact on the ship for co-ordinating the shipboard actions with the national and local authorities in combating the pollution 6. All oil tankers of 5000 tones deadweight or more shall have access to computerized shore based damage stability and residual structural strength calculation programs 16 June 2014 Mohd. Hanif Dewan, Chief Engineer and Maritime Lecturer &Trainer, Bangladesh13
  • 14. Oily water Separator –Coalescer 2nd Stage 16 June 201414 Mohd. Hanif Dewan, Chief Engineer and Maritime Lecturer &Trainer, Bangladesh
  • 15. 15
  • 16. 16 Operating Principles - Dirty bilge water enters the separator and because of the difference in density between oil and water oil will start to separate in the top part. - Further separation takes place in the lower chamber where the liquid has to pass through a stack of inverted conical plates before leaving the separator.
  • 17. 17 Operating Principles - Oil droplets from these plates tend to travel upwards on the under side of the plates joining with other oil droplets to form larger droplets. - These larger droplets are then able to rise through the water to the top of the unit.
  • 18. 18 Operating Principles - So as the Oil collects at the top of the separator a probe will detect the oil and through the control system open an electrically operated dump valve allowing the oil to be dumped to the dirty oil tank. - As the oil is dumped the probe will now sense water and close the dump valve
  • 19. 19 Operating Principles - As mentioned earlier the water which has now had nearly all the oil removed exits the separator at the bottom on its journey to the 2nd Stage Coalescer filter unit.
  • 20. 20
  • 21. 21 Function of a Coalescer: A Coalescer is a technological device performing coalescence. And, Coalescence is the process by which two or more droplets merge to form a single larger droplet. Or, Coalescence is the breakdown of surface tension between oil droplets in an oil/water mixture which causes them to join and increase in size.
  • 22. 22 Operating Principles - So as mentioned the water outlet from the separator is fed into the bottom of the Coalescer. - The water flows through the first and second stage coalesces removing the final traces of oil.
  • 23. 23 Operating Principles The oil from the coalesces floats to the top of their respective chambers where Oil sensors indicate a rise in Oil content. The oil can then be drawn off manually oil or automatic valves can open to dump the oil. The water outlet of the Coalescer is then directed to an Oil Content Monitor for final analysis.
  • 24. 24
  • 25. 25
  • 26. 26
  • 27. 27
  • 28. 28
  • 29. 29
  • 30. Oil in Water Monitoring System 16 June 201430  Current regulations with respect to the discharge of oily water from ships set limits of concentration 15 parts per million.  A monitor is required in order to measure these values and provide both continuous records and an alarm with auto stopping device where the permitted level is exceeded. Mohd. Hanif Dewan, Chief Engineer and Maritime Lecturer &Trainer, Bangladesh
  • 31. Oil in Water Monitor System 16 June 201431 Mohd. Hanif Dewan, Chief Engineer and Maritime Lecturer &Trainer, Bangladesh FROM OWS OUTLET TO BILGETANK TO BILGETANK VISUAL ALAM
  • 32. Oil in Water Monitor System 16 June 201432  The principle used is that of ultra-violet fluorescence.  This is the emission of light by a molecule that has absorbed light.  During the short interval between absorption and emission, energy is lost and light of a longer wavelength is emitted.  Oil fluoresces more readily than water and this provides the means for its detection. Mohd. Hanif Dewan, Chief Engineer and Maritime Lecturer &Trainer, Bangladesh
  • 33. Oil in Water Monitor System 16 June 201433  A sample is drawn off from the overboard discharge and passes through a sample cell .  An ultra-violet light is directed at the sample and the fluorescence is monitored by a photoelectric cell.  The measured value is compared with the maximum desired value in the controller/recorder. Where an excessive level of contamination is detected an alarm is sounded and diverting valves are operated.  The discharging liquid is then passed to a slop tank. Mohd. Hanif Dewan, Chief Engineer and Maritime Lecturer &Trainer, Bangladesh
  • 34. ANY QUESTION? THANK YOU! 16 June 201434 Mohd. Hanif Dewan, Chief Engineer and Maritime Lecturer &Trainer, Bangladesh

×