RO System Design & CSMPRO v6.0 Program - csmfilter.co.kr · RO System Design & CSMPRO v6.0 Program . ... • Softening, Concentration, ... • Reduce the plant capacity to obtain

RO System Design &

CSMPRO v6.0 Program

1 Copyright © 2014 Toray Chemical Korea Inc.

CONTENTS

System Design

CSMPRO v6.0 Introduction

1

2


System Design 1


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


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.


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.


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


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


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


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


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.


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.


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


Desalination cost

Typical Costs for a Reverse Osmosis Plant

* Source: ‘Desalination With A Grain of Salt’, 2006


Desalination cost

Evolution of the electrical consumption for seawater 1st pass RO


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.


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


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


System Design 2


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


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


System Design – Project Note

1

2

3

3. Unit Area

2. Project Information Area

1. Case Information Area


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


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 ]


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


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


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.


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


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


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.

Documents

RO System Design & CSMPRO v6.0 Program - csmfilter.co.kr · RO System Design & CSMPRO v6.0 Program . ... • Softening, Concentration, ... • Reduce the plant capacity to obtain