walnut shell filters
DESCRIPTION
Walnut shell filters. SAIDU BALDE JOSEPH PECSENYICKI KORKU TETTEY NAVJIWAN TINJAN. Chem 260 Project: 2013 Produced by:. Introduction. Walnut shell filtration where sand filters formerly used: more suitable for filtering free oil and suspended solids - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Walnut shell filters](https://reader033.vdocuments.us/reader033/viewer/2022061503/56814178550346895dad6547/html5/thumbnails/1.jpg)
1
WALNUT SHELL FILTERS
SAIDU BALDE
JOSEPH PECSENYICKI
KORKU TETTEY
NAVJIWAN TINJAN
Chem 260 Project: 2013Produced by:
![Page 2: Walnut shell filters](https://reader033.vdocuments.us/reader033/viewer/2022061503/56814178550346895dad6547/html5/thumbnails/2.jpg)
2
INTRODUCTION
![Page 3: Walnut shell filters](https://reader033.vdocuments.us/reader033/viewer/2022061503/56814178550346895dad6547/html5/thumbnails/3.jpg)
3
Walnut shell filtration where sand filters formerly used:
more suitable for filtering free oil and suspended solidstreat oil field produced waterrefinery wastewatersteel mill direct spray and caster
waterethylene plant quench watercopper concentrate decant cooling water
(Slide information from [6])
![Page 4: Walnut shell filters](https://reader033.vdocuments.us/reader033/viewer/2022061503/56814178550346895dad6547/html5/thumbnails/4.jpg)
4
Reduces:
•Backwash water volume•Weight•Footprint
Suitable for off-shore oil production
(Slide information from [2])
![Page 5: Walnut shell filters](https://reader033.vdocuments.us/reader033/viewer/2022061503/56814178550346895dad6547/html5/thumbnails/5.jpg)
5
• mechanically separate solids (or free droplets) from solution
Filters
(Slide information from [3])
![Page 6: Walnut shell filters](https://reader033.vdocuments.us/reader033/viewer/2022061503/56814178550346895dad6547/html5/thumbnails/6.jpg)
6
Filter Type A
Surface filters – sieves (size exclusion)
Eg: cheesecloth, coffee filters
Image: http://www.bravilor.com/en-IN/product/filter-cups/110
(Slide information from [3])
![Page 7: Walnut shell filters](https://reader033.vdocuments.us/reader033/viewer/2022061503/56814178550346895dad6547/html5/thumbnails/7.jpg)
7
Deep Bed (or Depth) filters
• droplets slowed in tortuous channels
• droplets attach to filter by some mechanism
Filter Type B
Image: http://www.nuts.com/nuts/black-walnuts/in-shell.html
Eg: black walnut shell filter
(Slide information from [3])
![Page 8: Walnut shell filters](https://reader033.vdocuments.us/reader033/viewer/2022061503/56814178550346895dad6547/html5/thumbnails/8.jpg)
8
Filter media
granules
Clear Path Tortuous Path
Flow
(Image: Joseph Pecsenyicki)
![Page 9: Walnut shell filters](https://reader033.vdocuments.us/reader033/viewer/2022061503/56814178550346895dad6547/html5/thumbnails/9.jpg)
9
Droplets slowed in tortuous channels
Droplets captured on walnut shell media via:• Direct collision• Diffusion
• London force attraction• Surface charge attraction /
repulsion(Slide information from [3])
![Page 10: Walnut shell filters](https://reader033.vdocuments.us/reader033/viewer/2022061503/56814178550346895dad6547/html5/thumbnails/10.jpg)
10
Link to Flash Animation
http://chou-seh-fu.com/presentations/chem260/walnutShellFilterAnimation.html
1. Click on link.2. Animation will load onto your default browser.3. Control+ or Control– to adjust screen size.4. Click anywhere on Flash screen to advance to next
animation sequence.5. Click green back button to play previous animation
sequence.6. Close browser when finished.
![Page 11: Walnut shell filters](https://reader033.vdocuments.us/reader033/viewer/2022061503/56814178550346895dad6547/html5/thumbnails/11.jpg)
11
ADVANTAGES OF WALNUT SHELL FILTERSI
• Lightweight media
• Strong & elastic less fracturing than sand less flaking than anthracite
• Non-abrasive less frictional damage to
media than sand / anthracite
(Slide information from [3])
![Page 12: Walnut shell filters](https://reader033.vdocuments.us/reader033/viewer/2022061503/56814178550346895dad6547/html5/thumbnails/12.jpg)
12
ADVANTAGES OF WALNUT SHELL FILTERS II
• Can be ground into optimal size
sand grains are a little too small – require higher flow pressure
• Coalesces oil easy to clean via water
backwash(Slide information from [3])
![Page 13: Walnut shell filters](https://reader033.vdocuments.us/reader033/viewer/2022061503/56814178550346895dad6547/html5/thumbnails/13.jpg)
13
CONCLUSION
Walnut shell filters:
• Saw adoption during early 1970s
• Widespread due to: Easy oil coalescence Mechanical properties Easy & chemical-free backwash properties
(Slide information from [3])
![Page 14: Walnut shell filters](https://reader033.vdocuments.us/reader033/viewer/2022061503/56814178550346895dad6547/html5/thumbnails/14.jpg)
14
Supplemental
Information(Skimmed through in original presentation due to time constraints)
![Page 15: Walnut shell filters](https://reader033.vdocuments.us/reader033/viewer/2022061503/56814178550346895dad6547/html5/thumbnails/15.jpg)
15
COMPARISON OF MEDIA
Media Oil affinity quotientPolyvinyl chloride 0.212Anthracite 0.042Silica sand 0.043Black walnut shells 0.033
g of oil retained by cm3 of media
(Slide information from [3])
![Page 16: Walnut shell filters](https://reader033.vdocuments.us/reader033/viewer/2022061503/56814178550346895dad6547/html5/thumbnails/16.jpg)
16
BLACK WALNUT SHELLS
(Slide images from [2])
![Page 17: Walnut shell filters](https://reader033.vdocuments.us/reader033/viewer/2022061503/56814178550346895dad6547/html5/thumbnails/17.jpg)
17
MEDIA GRANULES
(Slide images from [2])
![Page 18: Walnut shell filters](https://reader033.vdocuments.us/reader033/viewer/2022061503/56814178550346895dad6547/html5/thumbnails/18.jpg)
18
OIL-COATED WALNUT SHELL GRANULES
(Slide images from [2])
![Page 19: Walnut shell filters](https://reader033.vdocuments.us/reader033/viewer/2022061503/56814178550346895dad6547/html5/thumbnails/19.jpg)
19
INDUSTRIAL-SIZED WALNUT SHELL FILTER
• Vertical vessel: 48 – 66 inch walnut shell media depth
(Slide images & information from [2])
![Page 20: Walnut shell filters](https://reader033.vdocuments.us/reader033/viewer/2022061503/56814178550346895dad6547/html5/thumbnails/20.jpg)
20
Longer run times
Longer media lifetime
Fewer suspended solids escape downstream
VERTICAL FILTRATION
(Slide image & information from [2])
![Page 21: Walnut shell filters](https://reader033.vdocuments.us/reader033/viewer/2022061503/56814178550346895dad6547/html5/thumbnails/21.jpg)
21
OIL REMOVAL
• 100 PPM oil enters
•Oil droplets > 2 μm ≈ 95% removal
•Oil droplets > 5 μm ≈ 98% removal
•< 5 PPM oil exits
(Slide image & information from [2])
![Page 22: Walnut shell filters](https://reader033.vdocuments.us/reader033/viewer/2022061503/56814178550346895dad6547/html5/thumbnails/22.jpg)
22
Media requires aqueous wetting before use.
Backwash:
• Once per day
• Water backwash – no chemicals
• 20-30 min. process
• 1% to wastewater
Media attrition: 5% per year. (Slide images & information from [2])
![Page 23: Walnut shell filters](https://reader033.vdocuments.us/reader033/viewer/2022061503/56814178550346895dad6547/html5/thumbnails/23.jpg)
SOURCES[1] Abdallah, W., et al. (2007). Fundamentals of
Wettability. Oilfield Review. Summer. pp. 44, 49.
[2] Howdeshell, M., Catalanotto, C. and Lorge, E. (Siemens) .“Walnut Shell Filter Reuse Potential.” 2011. Retrieved October 15, 2013 from http://www.sawea.org/pdf/Mike_Howdeshell.pdf
[3] Kashaev, S. and Lee, D. (2010). Deep Bed Nutshell Filter Evolution. Retrieved October 27, 2013 from: http://www.exterran.com/Content/Docs/Products/Deep-Bed-Nutshell-Filter-Evolution-English-Letter.pdf
[4] Ian Mackay. Instructor, SAIT. Interview. Calgary, AB. November 4, 2013
[5] Kari McDonald. Instructor, SAIT. Interview. Calgary, AB. November 8, 2013
23
![Page 24: Walnut shell filters](https://reader033.vdocuments.us/reader033/viewer/2022061503/56814178550346895dad6547/html5/thumbnails/24.jpg)
SOURCES[6] Siemens. “Auto-Shell™ Filter: Walnut Shell
Filtration.” 2009. [Online]. Retrieved October 15, 2013 from http://www.water.siemens.com/SiteCollectionDocuments/Product_Lines/Monosep/Brochures/ZP-AUSH-DS-0310.pdf
24
![Page 25: Walnut shell filters](https://reader033.vdocuments.us/reader033/viewer/2022061503/56814178550346895dad6547/html5/thumbnails/25.jpg)
25
ADDITIONAL REFERENCES
Filtra Systems Technology. “Deep Bed Media Filter.” n.d. [Online]. Retrieved October 15, 2013 from: http://filtrasystems.com/products/deep-bed-media-filter/