RO System Design & CSMPRO v6.0 Program - csmfilter.co.kr · RO System Design & CSMPRO v6.0 Program...
Transcript of RO System Design & CSMPRO v6.0 Program - csmfilter.co.kr · RO System Design & CSMPRO v6.0 Program...
RO System Design &
CSMPRO v6.0 Program
1 Copyright © 2014 Toray Chemical Korea Inc.
CONTENTS
System Design
CSMPRO v6.0 Introduction
1
2
2 Copyright © 2014 Toray Chemical Korea Inc.
System Design 1
3 Copyright © 2014 Toray Chemical Korea Inc.
Consideration of Feed Source, Application
The membrane system design depends on
Feed Source, Feed Quality, Feed/Product Flow, and Required Product Quality.
Water Source
Well water
Surface water
Sea water
Waste water
Feed Quality
SDI, TSS, TDS
COD, BOD, TOC
Pretreatment
Type
Flowrate
Feed / product
Flowrate
Recovery
Product Quality
Application
Membrane
Model
4 Copyright © 2014 Toray Chemical Korea Inc.
Selection of configuration and No. Passes
Single Pass System Double Pass system
The standard flow configuration,
where the feed water is passed
once through the system.
Combination system of two conventional RO system where
permeate of the first system becomes the feed for the second
system. It is used to produce ultra pure water for semi-conductor
and pharmaceutical and sea water desalination.
5 Copyright © 2014 Toray Chemical Korea Inc.
Selection of configuration and No. Passes
Concentrate Recirculation Permeate Blending
Dilution of the feed of the 1st pass by the 2nd pass brine
improve the permeate water quality. (4% reduction)
and decrease specific energy. (5% reduction)
Reduction of the feed flowrate as much as that of
the 2nd pass reduce the system capacity and increase
system recovery.
The system, where some ratio of feed water or permeate
of 1st pass is mixed to final product.
The smaller system can be achieved.
6 Copyright © 2014 Toray Chemical Korea Inc.
Membrane Type Selection
Membranes are selected by
Feed Concentration, Fouling Tendency, Required Rejection and Energy Requirements.
• Feed Concentration
• Under 1,000 mg/L ; BL series
• Under 10,000 mg/L ; BN, BE
• Under 50,000 mg/L ; SHN, SHA, SHF
• Application
• Softening, Concentration, 1st Pass of Seawater ; NF
• Wastewater reuse, Zero discharge ; FEn, FL, FLR
• Ultra pure water, Hero System ; HUE, UL
• Energy Requirements
• Low pressure requirement ; BL, FL, UL
• Normal pressure requirement ; BE, FEn, HUE
• High pressure requirement ; BR, SHN, SHA, SHF
• Membrane Dimension
Under 4040 Size
8040 Size
1 m3/hr 2m3/hr 3 m3/hr 4 m3/hr 5 m3/hr
7 Copyright © 2014 Toray Chemical Korea Inc.
Determining of Average Flux
The average permeate flux should be determined by the Feed Water Quality (SDI) as well as
Feed Water Sources
Kinds of feed
water source
RO
Permeate
Well
Water Surface Water
Filtered Municipal Effluent
(Wastewater) Seawater
MF or UF
Pretreatment
Conven-
tional
Well
or MF
Open
intake
SDI < 1 < 3 < 3 < 5 < 3 < 5 < 3 < 5
Average Flux
(gfd) 21-25 16-20 13-17 12-16 10-14 8-12 8-12 7-10
8 Copyright © 2014 Toray Chemical Korea Inc.
Calculation of the No. of membranes & PV
For the Surface Feed Water (SDI < 5), to get 100 m3/hr of the product water
Determine the average flux
Design guide lines : 12- 16 gfd
Choose : 12 gfd
Determine module size and grade
Module size : 8” membrane
Grade : RE8040-BE (Area : 400 ft2)
Calculation flowrate
per one module
400 ft2/element x 12 gfd =
4,800gpd / element = 757ℓ/hr
How many RE 8040-BE elements are
required
100,000 ℓ/hr ÷ 757ℓ/hr/element
= 132.1 elements
133 elements are required
How many vessels
(6 elements/vessel) are required
133 elements ÷ 6elements/vessel
= 22.2
23 vessels are required
NE = f * SE
Qp Nv =
NE/PV
NE
NE
Qp
f
Nv
NE/PV
: The number of elements
: The design permeate flowrate
: The design flux
: The number of pressure vessel
: The number of elements per pressure vessel
9 Copyright © 2014 Toray Chemical Korea Inc.
Determining of System Array
The number of stages is a function of the planned system recovery,
the number of elements per vessel and the feed water quality.
• Designed system recovery depends on feed water source and quality in general
• For the Sea water feed : 30 - 60%
• For the Brackish water feed : 75 - 85%
• For the RO permeate feed : 85 - 95%
• Array on system recovery
• Less than the 50% Recovery : one array
• Less than the 80% Recovery : two array
• over 80% Recovery : three array
For the RO permeate : System is designed to get 90% recovery with 2 array
For the Waste water : System is designed to get 75% recovery with 3 array
10 Copyright © 2014 Toray Chemical Korea Inc.
Feed Water Guideline
Component Unit Max. level Comments & conditions
SDI 1 5
MFI 1 4 Target <1
Oil & Grease mg/L 0.1 Target = 0
TOC mg/L 3 Synthetic organic compounds(SOC) have generally more adverse effects
on RO/NF membranes compared with natural organic matters(NOM)
COD mg/L 10
BOD mg/L 5
Free Chlorine mg/L 0.1 Recommends removing residual free chlorine by pre-treatment prior to
membrane exposure.
TSS mg/L 1 Target=0
Ferrous iron
(Fe2+) mg/L 4 pH<6, oxygen <0.5ppm
Ferric iron
(Fe3+)
Manganese
Aluminum
mg/L 0.05 These accelerate oxidation of membrane
under existing an oxidizing component in feed water.
11 Copyright © 2014 Toray Chemical Korea Inc.
Saturation Limits
Scale or foulant Normal Maximum
Reported CSM alarm
LSI or SDSI
(calcium carbonate) +1.8 +2.9 +1.5
Calcium Sulfate 230% 400% 230%
Strontium Sulfate 800% 1,200% 800%
Barium Sulfate 6,000% 8,000% 6,000%
Calcium Fluoride 100% 12,000% 100%
Silica 100% 130% 100%
Iron Not alarm 5ppm Not alarm
Aluminum Not alarm 4ppm Not alarm
• LSI (Langlier Saturation Index) LSI is a method of reporting the scaling or corrosive potential of low TDS brackish water based on the level of saturation of calcium carbonate.
• SDSI (Stiff Davis Saturation Index) SDSI, in similar fashion as LSI, is a method of reporting the scaling or corrosion potential of high TDS seawater based on the level of saturation of calcium carbonate.
12 Copyright © 2014 Toray Chemical Korea Inc.
Consideration in Design
• Improve product quality
- Use part or all seawater elements for brackish feed water
- Use seawater elements in one or both stages of double pass system
- Recycle permeate of last stage into feed
- Use Split partial blending in double pass system
• Increase system recovery
- Feed the concentrate to a second system, after specific pretreatment
- Recycle the concentrate to feed stream
• Obtain high system recovery and uniform permeate flow
- Use booster pumps between stages to compensate for osmotic pressure increase
- Use permeate back pressure from first to last stage
- Use Hybrid system design with tighter membranes in the first stage than in the second stage
• Reduce the plant capacity to obtain just the required permeate quality
- Blend the permeate with feed water
13 Copyright © 2014 Toray Chemical Korea Inc.
Desalination cost
Typical Costs for a Reverse Osmosis Plant
* Source: ‘Desalination With A Grain of Salt’, 2006
14 Copyright © 2014 Toray Chemical Korea Inc.
Desalination cost
Evolution of the electrical consumption for seawater 1st pass RO
15 Copyright © 2014 Toray Chemical Korea Inc.
Split Partial Blending
Advantages of Split Partial
Split Partial Blending?
1. “Blending” Double Pass RO System 2. “Split-Partial” Double pass RO System
1. Smaller first & second pass RO trains
2. Better permeate quality than blending
3. Reduced capital & operating cost
4. Flexibility in system operation according to actual
conditions
Permeate is collected from both sides of the pressure vessel. Low TDS front permeate is than sent directly to final
product line, while higher TDS back permeate is treated by partial second pass RO plant.
16 Copyright © 2014 Toray Chemical Korea Inc.
Split Partial Blending
1. Fixed split ratio : by installing a permeate plug after 3rd or 4th RO membrane
2. Variable Split Ratio : utilizing flow control valves to control permeate split ratio
17 Copyright © 2014 Toray Chemical Korea Inc.
Hybrid
Hybrid?
To optimize feed pressure and system salt rejection, several kinds of membranes are installed to one pressure
vessel.
Installed Membrane
Permeate
Quality
TDS
(mg/l)
Expected
Power
Consump-
tion
(kWh/day)
Single
SHN 6 EA 140.7 18,158
SHA 6 EA 182.3 16,951
SHF 6 EA 265.9 16,204
Hybrid
A SHN 2 EA + SHA
3 EA + SHF 2 EA 177.1 16,834
B SHN 4 EA +
SHF 3 EA 182.4 17,237
C SHF 2 EA + SHA
3 EA + SHN 2 EA 191.2 16,222
D SHF 4 EA +
SHN 3 EA 229.2 16,379
Vessel (Single Stage)
Single
H
ybrid
18 Copyright © 2014 Toray Chemical Korea Inc.
System Design 2
19 Copyright © 2014 Toray Chemical Korea Inc.
Major Features
1. New Features ◆ Energy Recovery Device option is added
◆ Support of energy consumption result
◆ Br and PO4 ions are added
2. Improved Prediction Accuracy
◆ Concentration correction factors are updated
◆ pH correction factors are updated
◆ All of scale saturation data are updated
3. Improved NF Design ◆ A high concentration feed is applicable
◆ Improvement of convergence error
4. Improved User interface ◆ Revised Hybrid Option
◆ Changed the layout for user convenience
5. Various Output Print ◆ Save in PDF, Word, Excel, PowerPoint format
20 Copyright © 2014 Toray Chemical Korea Inc.
Registration
1. CSMPRO live update agent will appear on the screen to
download recent version
2 User can set a preference as left dialog box to use this
program easily.
User information, preferred units, and languages are able
to set and/or change with this windows.
[Option] – [Preference] on the head menus
21 Copyright © 2014 Toray Chemical Korea Inc.
System Design – Project Note
1
2
3
3. Unit Area
2. Project Information Area
1. Case Information Area
22 Copyright © 2014 Toray Chemical Korea Inc.
System Design - Feed
1. Select feed water source.
2. Feed water concentration. Using TDS term or Ionic concentration
5. Temperature of feed water
7. Additional feed water quality.
No use for calculation but for understand
the feed water condition
6. Using this button to balance ion
concentration between anion and cation.
2 4 5
6
4. pH of feed water
3. Conductivity will be calculated
automatically, but it’s not exact.
There is no exact conversion factor
between TDS and Conductivity.
3
7
1
8. Scale Calculation Area
(See the next page)
8
23 Copyright © 2014 Toray Chemical Korea Inc.
System Design – Feed – Scale Calculations
3. Softening
By using this option, almost Ca2+, Mg2+ will
changed into Na+
4. pH Adjustment
By using this option, Chemical consumption can
be calculated
1
2
2. Execution Buttons
[ Calculation ] button must be clicked
to activate, after all kinds of acting
3 4
1. System Saturation Information
pH is able to adjust with option
[ pH Adjustment ]
24 Copyright © 2014 Toray Chemical Korea Inc.
System Design – System
1
2
3
4
5
6
1. Choose a single pass / double pass
4. Options
3. Array Configurations
5. pH Adjustment for
2nd pass feed and/or
final product
6. Brief of flow diagram
2. Design parameters
7. Projection result 7
25 Copyright © 2014 Toray Chemical Korea Inc.
System Design – Cost
1. Toggle buttons for pass selection
2
1
3
4
5
2. Capital Cost
3. Membrane Replacement
4. Operation Cost
Check box should be
selected to insert values.
5. Energy Recovery Device
26 Copyright © 2014 Toray Chemical Korea Inc.
Result – Diagram
Flow Diagram with brief information
After click a [ RESULT ], the program will show a this diagram. Some information including flow rate, TDS, pressure,
flow diagram and recovery is demonstrated on the results.
For more details, choose a [ Result Scan ] Tab.
27 Copyright © 2014 Toray Chemical Korea Inc.
Result – Result Scan
1
2
3
4
5 7
6
2. Toggle buttons for pass and
each array data
3. Overall pass information
4. Each pass or array details
5. Ionic concentration information
for selected pass or array
6. Errors and Warnings
7. Saturation Information
Limitation Warning
Limitation tool tip will be appeared when mouse pointer locate on a red values which exceeded than limitation in Each pass or array
details ④ and saturation information ⑦
1. Overall projection data
28 Copyright © 2014 Toray Chemical Korea Inc.
Result – Cost
Cost Analysis
It provides capital and operation cost of each block and specific cost Pre & Post chemical consumption is based on each flow rate.
1
2
3
4
1. Unit Conversion
2. Overall Information
3. Capital Cost
4. Operation Cost
29 Copyright © 2014 Toray Chemical Korea Inc.
Print Out
1 2 1. Save
2. Print
4 4. Overview of
each format
3
3. Page
Option
Several Option to use it easily.
Save as PDF, Excel, PowerPoint, Word format Directly print out.