Seaclean filter - Protect the core of reverse osmosis membranes with multimedia filtration
Upcoming SlideShare
Loading in...5
×
 

Seaclean filter - Protect the core of reverse osmosis membranes with multimedia filtration

on

  • 645 views

Pressurized multi-media filtration for desalination the clarification of seawater

Pressurized multi-media filtration for desalination the clarification of seawater

Statistics

Views

Total Views
645
Views on SlideShare
645
Embed Views
0

Actions

Likes
0
Downloads
9
Comments
0

0 Embeds 0

No embeds

Accessibility

Categories

Upload Details

Uploaded via as Adobe PDF

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

Seaclean filter - Protect the core of reverse osmosis membranes with multimedia filtration Seaclean filter - Protect the core of reverse osmosis membranes with multimedia filtration Presentation Transcript

  • Seaclean™ Filter PRESSURIZED MULTI-MEDIA FILTRATION FOR DESALINATION THE CLARIFICATION OF SEAWATER PROTECT THE CORE OF REVERSE OSMOSIS MEMBRANES WITH MULTI-P-PPT-D-003-EN-1004 MEDIA FILTRATION
  • DESALINATIONDESSALEMENT CONTENTS Seaclean™ Filter Seawater Pre-treatment Objectives Seaclean™ Filter Description Seaclean™ Filter in Treatment Lines Product Performances Advantages of Seaclean™ Filter Case Study: Al Dur, Bahrain 2
  • DESALINATIONDESSALEMENT PRE-TREATEMENT OBJECTIVES Seaclean™ Filter To maximize the efficiency and lifespan of a desalination plant using reverse osmosis, pretreatment aims to prevent clogging of osmosis membranes by: • removing algae/suspended solids/colloids, • obtaining a low clog power of water. 3
  • DESALINATIONDESSALEMENT Seaclean™ Filter DESCRIPTION (1/2) Seaclean™ Filter • Seaclean™ Filter is a pressurized horizontal filter that applies a downflow through 2 layers of media: − A top layer of anthracite – A bottom layer of sand • The characteristics of Seaclean™ Filter: – Diameter 4m – Length 12,5 or 16 m – Nominal surface area: 51 m² or 63m² • Backwash is divided in 2 phases: – One air phase – One water phase ANTHRACITE SAND 4
  • DESALINATIONDESSALEMENT Seaclean™ Filter DESCRIPTION (2/2) Seaclean™ • The innovation consists in applying the new Anthracite / Sand Filter pair while the pressurized twin-layer technique remains unchanged. • The first layer is used to screen out suspended solids. • The second layer is used to reduce the SDI (Silt Density Index) • There are 2 possible media combinations: – Type A combination: Anthracite = 1.5mm / Sand = 0.28mm – Type B combination: Anthracite = 1.2mm / Sand = 0.28mm 5
  • DESALINATIONDESSALEMENT Seaclean™ Filter IN TREATMENT LINES Seaclean™ Seaclean™ Filter forms part of Reverse Osmosis pre-treatment Filter in seawater desalination line. • Downstream from a flash flotation tank (Seadaf™) on water that has occasional organic matter and algae bloom peaks: Coagulant Coagulant H2SO4 H2SO4 Coag. aid RO Seaclean™ Seadaf™ • In direct filtration application for treating turbidity: Coagulant H2SO4 Coag. aid RO Seaclean™ 6
  • DESALINATIONDESSALEMENT Seaclean™ PERFORMANCE (1/2) Seaclean™ • FILTRATION VELOCITIES: Filter − Depending on the quality and temperature of the water − Depending on whether or not the clarification stage is included (flotation or sedimentation) FILTRATION VELOCITY ON DUAL MEDIA FILTER * Velocity n : nominal velocity range with all the filters in operation 7
  • DESALINATIONDESSALEMENT Seaclean™ PERFORMANCE (2/2) Seaclean™ • BACKWASH VELOCITIES: Filter Backwash velocity during water alone phase at 20°C for media combinations. (NES = Nominal Effective Size in mm) 8
  • Seaclean™ Filter ADVANTAGESDESALINATIONDESSALEMENT Seaclean™ Filter• FILTERED WATER OF A STABLE QUALITY: – Good layer re-grading after washing – Regular cycle times• MINIMIZED DANGER OF MEDIA LOSS: – Thanks to the optimized process (filtration / backwash rate)• WASH EQUIPMENT REDUCED TO A MINIMUM• EFFICIENT REVERSE OSMOSIS PRE-TREATMENT 9
  • CASE STUDY: AL DUR, BAHRAINCONTEXT:• Client: Hyundai Heavy Industries (GDF Suez Energy Int. / Gulf Investment Corporation 50/50 consortium)• Contract: BOO – Commissioning: 2011• Electricity generating and seawater desalination plantDESIGN:• Drinking water production capacity: 218,000 m3/jour• Treatment line: − Pumping − 14 Seadaf™ flotation units − 44 Seaclean™ units − 26 reverse osmosis racks, 1st pass − Energy recovery (Pelton Turbine) − 12 reverse osmosis racks, 2nd pass 10