16
GRUNDFOS ALLDOS DATA BOOKLET Selcoperm electrolytic chlorination system Reliable and easy generation of hypochlorite solution for disinfection applications

Selcoperm electrolytic chlorination system - wesdp.com€¦ · GRUNDFOS allDOS Data Booklet Selcoperm electrolytic chlorination system Reliable and easy generation of hypochlorite

Embed Size (px)

Citation preview

GRUNDFOS allDOS Data Booklet

Selcoperm electrolytic chlorination system Reliable and easy generation of hypochlorite solution

for disinfection applications

2

SelcopermGeneral

Fundamentals of disinfectionMany diseases are transmitted by drinking water. Among these diseases are typhus, paratyphoid, cholera and diarrhoea with vomiting, as well as viral infections such as hepatitis and poliomyelitis. Legionella in shower or bathing water can provoke pulmonary diseases.

Compared to the chemical contamination of water, where toxicity values are attained only slowly in general, in a drinking water epi-demic infections spread dramatically in the whole supply area. The best prevention of epidemics is to use microbiologically clean non polluted water, preferably deep ground water as drinking water. Unfortunately, in some regions this is not possible for hydrogeological or quantitative reasons. In these regions, surface water is used, which often has to be purified. Pathogens that are possibly encountered, can be removed from the water or killed by adding certain substances to the water, i.e. by disinfecting the water.

Disinfection with chlorineThe most widespread disinfectant used in the treatment of drinking water is chlorine, which can be applied in a variety of ways. History has taught us that, in bacteriological terms, chlorinating water is a quite safe way of disinfecting drinking water. After all, more than 75 years have passed since chlorine was used to disinfect drinking water for the first time. Many years of experience have shown that acute toxicity can be excluded, when chlorination is executed correctly.

The disinfecting properties of chlorine are based on the fact that hypochlorous acid (HClO) is produced when it is dissolved in water, according to the equation Cl

2 + H

20 D HCl + HClo

and depend strongly on the pH value. The best effect is obtained with pH values less than 7.5.

Generally, three methods are used for chlorinating drinking and process water:

1. Chlorine gas dosing

2. Dosing of sodium or calcium hypochlorite solution

3. Electrolytic chlorine generation

The third method in particular offers a number of advantages, which are incorporated in the Selcoperm chlorine electrolysis systems.

Dissociation of hypochlorous acid in dependence of the pH value

0

20

40

60

80

100

100

80

60

40

20

0

4 5 6 7

% HClO % Cl2

pH

HClO

Cl2 ClO-

1 2 3 8 9

3

Selcoperm

the Selcoperm electrolysis principleWith electrolysis, chlorine is produced directly from a solution of common salt using electricity.

General

The following reactions take place in the electrolytic cell:

2 NaCl + 2 H2o g 2 NaoH + Cl

2 + H

2

The chlorine produced reacts immediately with the caustic soda solution also formed, resulting in a hypochlorite solution:

Cl2 + 2 NaoH D NaCl + NaClo + H

2o

The solution generated has a pH value between 8.5 and 9.5, and a maximum equivalent chlorine concentration in the range of 6 - 8 g/l. It has a half-life of several months, which makes it ideal for storage in a buffer tank.

After dosing the solution into the water flow, no pH value correction is necessary, as it is often required e.g. in electrolysis according to the membrane principle. The sodium hypochlorite solution reacts in a balance reaction, resulting in hypochlorous acid, the efficient disinfectant:

NaClo + H2o D NaoH + HClo

The dosing quantity depends on the application as well as the local regulations. In general, the concentration after the injection unit is 0.3 to 2 ppm chlorine equivalent.

cathode anode

NaCl +H2O

NaClO solution

H2

H2ONaCl

NaClO

H+

NaOH

Na+

OH–

Cl2

Cl–

the benefits of the electrolysis with Selcoperm• Robustturn-key system

• Safe and reliable method of producing chlorine on-site

• Commonsaltisthebasematerial–itisnontoxic,easytostoreandtohandle.

• Onlywater,commonsaltandelectricityisneededfortheelectrolysis–lowoperatingcosts,world-wideuse

• Freshhypochloriteisalwaysonhand–thedisinfectantsolutiondoesnotdissociatelikecommercialhypochloritesolutions

• Lowerformationofchlorateasaby-product

• ApproveddisinfectionmethodcomplyingwiththeDWIdrinkingwaterregulations–analternativewithlesssafetyrequirementstochlorine-gas-based systems

• Robustandelementarycomponents–low-maintenanceandalongservicelife,comparedwiththemembranecellelectrolysis

• Lower pH of product compared with commercial sodium hypochlorite reduces scaling of injection points etc. in hard water areas.

the applicationsTypical disinfection applications for Selcoperm systems are especially in

• drinkingwatertreatment

• swimmingpoolwatertreatment

• industrial treatment for cooling towers or process water.

The systems are an excellent alternative to chlorine-gas or commercial hypochlorite applications.

4

SelcopermRequirements

Installation scheme of a Selcoperm system in a room

Requirements for the installation

Water • Goodwaterqualitywithlowiron(<200mg/m3)andmanganese(<50mg/m3) content, preferably drinking water

• Supplypressurerange:from2.5to10bars.Forlowerwaterpressures,boosterpumpsareavailable.• Waterinflowtemperaturemustbeintherangeof5°Cto20°C.

Water demand 125-150 litres per kg of prepared chlorine

Salt • Food-gradecommonsalt(DIN19604orEN973)

• Fordrinkingwaterdisinfection,saltwithalowbromideconcentrationmustbeused(max.0.01%)

Salt consumption 3 to 3.5 kg of salt per kg of prepared chlorine

electrical connection 185 to 265 V or 380 to 440 V; 50/60 Hz

Power consumption approx. 4.5-5.5 kWh per kg of prepared chlorine

Drain An on-site drain for the regeneration water of the water softener is necessary.

exhaust air • Theoutletoftheexhaustairhastobeascloseaspossibletotheelectrolyticchlorinationsystem.• Inaddition,naturalairsupplyviaaventilationholeintheroomisrequired.

1 The internal vent tube has to be piped to the exterior of the building. Minimum tube diameter 90 mm. Maximum length of the tubing 10 m. Must be installed without dips and adequately supported to a safe discharge point.

2 Minimum diameter 32 mm for tubing between the unit and the product tank. Tubing from the Tee above the product tank in an upwards direction until the Venturi Tee.

3 A Venturi Tee is supplied together with the system to assure the adequate dilution of the exhaust air. It should be mounted as close as possible to the vent discharge point.

4 The top edge of the brine has to be at least 100 mm above the brine outlet. 5 Around the electrolysing system, enough space should be left free for operation and maintenance work.6 It is recommended that the room has high and low level natural ventilation.

Components of the installation:

a Selcoperm electrolytic chlorination system

B Brine tankC Product tankD Dosing pumpse Vent tubing

A

B

C

D

E3

6

1

4

2

65 5

750 750

5

Selcoperm

Structure of a Selcoperm systemSelcoperm units comprise of the electrolyser, degassing column, brine dosing pump, exhaust fan with quantitative air flow monitor for air dilution of electrolyser chamber and a water softening system. Additional equipment which is required is a salt saturator, product tank for storage of the generated solution and dosing pumps. The installation can be rounded off with a measuring and control unit for chlorine dosing, if required.

The Selcoperm system is supplied as a turn-key solution, only the tubing for the water connection, the connections for the salt and prod-uct storage tanks and the exhaust air tubing have to be installed. The size of the storage tank depends on the space available and the amountofNaClObufferstoragerequired.Thesizingofthebrinetankalsodependsonthespaceavailableandonthesaltfillingoption:manual or automatic.

Unique selling Points• Quantitativeairflow-airisblowncontinuouslythroughtheelectrolyserchamber,andismonitoredbyaquantitativeairflowsensor

to ensure that the correct volume of air is flowing through the system at all times.

• Theelectrodesaswellasthehydrogendegassingcolumnaredualcontained,inordertoavoidhydrogenleakingfromthesystemintothe plant room.

• Noexternalriskzone–fullycompliantwithATEX.

• Negativepressureonproductstoragetank–aventuriteeisfittedinthehydrogenventilationpipework;thisservesasasiphonbreakand tank ventilation to ensure that all hydrogen in the product tank is safely removed to atmosphere.

• Productsolutionwith6-8g/lchlorineconcentrationcanbestoredforseveralweekswithoutanydegradation.

Structure / Dimensioning

DimensioningStandard Selcoperm systems are available in five capacity levels. The choice of the system depends on the maximum daily chlorine demand (dosing quantity x daily maximum water flow rate).

Selection diagram

Dosing quantity in mg/l

Water flow (log)

Corresponding chlorine quantity

Selcoperm 2000

Selcoperm 1000

Selcoperm 500

Selcoperm 250

Selcoperm 125

larger capacities available on request

smaller capacities available on request

6

SelcopermStructure

Structure of a Selcoperm system (description see pages 6 - 8)

electrolyser cell and hydrogen degassing column

• Installedinaseparatechamberwithaquantitativelymonitoredairflow• Electrolysercell(1) in a vertical transparent PVC pipe for easy process monitoring and visual electrode check• Electrodesaremadeoftitaniumcarriermaterialwithaverydurablecatalyticmetallicoxidecoating,alsosuitableforcoldwater

applicationsof5°Candhigher.• Thehydrogendegassingcolumn(2) removes the formed hydrogen via the vent hole and prevents it from penetrating the product

storage tank. The hydrogen is piped through the outlet (F) via a dual contained pipework into the ambient air. In the event of a block-age, an integrated sensor switches off the system.

Hydraulic chamber

• GrundfosAlldosdosingpump(3) with a wide adjustment range for precise dosing of the salt solution

• Flowmeter(4) with switch for safe process interruption, if the value falls below its critical minimum

• Waterflowvalve(5) for the reproducible adjustment of the dilution ratio

• Adjustablepressurereducingvalve(6) with pressure reading for the water supply

• Continuouslyoperatingwatersoftenersystem(7) for the reduction of the water hardness to below 20 mg/l (CaCO

3)

• Samplevalvesforsoftenedwater(B), brine solution (C) and product solution (D)

Control system

• Lockablecontrolpanel(10) IP 55 with integrated water cool-ing for the high-performance electronics

• Displaywithpresentationofsystemstatus,amperage,volt-age, service hours and air flow rate

• Functions:automatictankrefilling,manualsystemshutdownor remote Off

• Displayoferrormessages:low voltage, high voltage, overtemperature electrolyser cell, leakage, overtemperature electronics, ventilation error, water flow error.

• Potential-freealarmcontact

Ventilation

• Airdilutionfan(11) with air flow sensor (12)• Forcedventilationintheelectrolyserchamber.Atthevent

discharge point outside the building dilution of the hydrogen produced.

The turn-key Selcoperm systems are piped, wired, labelled and tested before delivery.

6 7

12 F

10

11

12

3

9

4

5

8

7

SelcopermStructure / Measurements

Structure and measurements of a Selcoperm system

View left side View right side

Measurements in mm

legend1 Electrolyser cell2 Hydrogen degassing column3 Dosing pump4 Water flow meter5 Water flow valve6 Pressure reducing valve7 Water softener8 Level sensor9 Non-returnvalve10 Control panel11 Air dilution fan12 Exhaust system with air flow sensor 13 Drain plug

D Outlet: product to storage tankF Ventdischargeoutlet

10

90

80

70

60

50

40

30

20

100

I/h

1000 (125-500)

1100 (1000 - 2000)

1800

1000 (125-500)

1100 (1000 - 2000)

1800

11.

12.

10.

11.

12.

10.

1.

2.

8.

5.

4.

9.

3.

6.7.

12.12.

8

Selcoperm

Connections

Connection Internal diameter

metric imperial

Water Inlet (A) 20 mm 1/2”

Softened water outlet (B) 20 mm 1/2”

Brine solution inlet (C) 20 mm 1/2”

Product outlet (D) 32 mm 1”

Rinsingwateroutlet(E) 32 mm 1”

Ventdischargeoutlet(F) 90 mm 3”

Measurements

Measurements in mm

Measurements of a Selcoperm system

FrontviewBack view

legend10 Control panel11 Air dilution fan12 Exhaust system13 Drain plug

A Water Inlet

B Softened water outlet

C Brine solution inlet

D Product outlet

E Rinsingwateroutlet

F Vent discharge outlet

12

A

B

C

E

1330

1430

1530

1660

125

D

F

700

12

1313

11

10

700

9

SelcopermIdentification

type key SeS electrolytic chlorination systemexample: type key SeS-250-M/1 = capacity 250 g/h, metric connections, supply voltage 220-260 V / 50 Hz

example: SeS -250 -M /1

type range

Max. capacity

125 125 g/h 250 250 g/h 500 500 g/h1000 1000 g/h2000 2000 g/h

Connection

I imperialM metric

Supply voltage

H 95-120 V / 50-60 Hz1 220-260 V / 50 Hz6 240-260 V / 60 Hz4 380-440V/50Hz;3+N*5 380-440V/60Hz;3+N*

N*=neutral

10

Selcopermtechnical Data

technical data / order data

Selcoperm Capacity Voltage Phases Frequency Connections order Number

type [g Cl2/h] [kg Cl

2/day] [V] [Hz]

SeS-125-I/1

125 3

220-260 1 50 imperial95702180

(195-125-10003)

SeS-125-I/6 240-260 1 60 imperial95702181

(195-125-10004)

SeS-125-I/H 95-120 1 50-60 imperial95702182

(195-125-10005)

SeS-125-M/1 220-260 1 50 metric95702167

(195-125-10000)

SeS-125-M/6 240-260 1 60 metric95702178

(195-125-10001)

SeS-125-M/H 95-120 1 50-60 metric95702179

(195-125-10002)

SeS-250-I/1

250 6

220-260 1 50 imperial95702192

(195-250-10003)

SeS-250-I/6 240-260 1 60 imperial95702193

(195-250-10004)

SeS-250-I/H 95-120 1 50-60 imperial95702194

(195-250-10005)

SeS-250-M/1 220-260 1 50 metric95702189

(195-250-10000)

SeS-250-M/6 240-260 1 60 metric95702190

(195-250-10001)

SeS-250-M/H 95-120 1 50-60 metric95702191

(195-250-10002)

SeS-500-I/1

500 12

220-260 1 50 imperial95702200

(195-500-10004)

SeS-500-I/6 240-260 1 60 imperial95702201

(195-500-10005)

SeS-500-I/4 380-440 3+N* 50 imperial95702202

(195-500-10006)

SeS-500-I/5 380-440 3+N* 60 imperial95702203

(195-500-10007)

SeS-500-M/1 220-260 1 50 metric95702196

195-500-10000

SeS-500-M/6 240-260 1 60 metric95702197

(195-500-10001)

SeS-500-M/4 380-440 3+N* 50 metric95702198

(195-500-10002)

SeS-500-M/5 380-440 3+N* 60 metric95702199

(195-500-10003)N*=neutral

11

Selcopermtechnical Data

technical data / order data (continuation)

Selcoperm Capacity Voltage Phases Frequency Connections order Number

type [g Cl2/h] [kg Cl

2/day] [V] [Hz]

SeS-1000-I/1

1000 24

220-260 1 50 imperial95702171

(195-1000-10004)

SeS-1000-I/6 240-260 1 60 imperial95702172

(195-1000-10005)

SeS-1000-I/4 380-440 3+N* 50 imperial95702173

(195-1000-10006)

SeS-1000-I/5 380-440 3+N* 60 imperial95702174

(195-1000-10007)

SeS-1000-M/1 220-260 1 50 metric95702205

(195-1000-10000)

SeS-1000-M/6 240-260 1 60 metric95702168

(195-1000-10001)

SeS-1000-M/4 380-440 3+N* 50 metric95702169

(195-1000-10002)

SeS-1000-M/5 380-440 3+N* 60 metric95702170

(195-1000-10003)

SeS-2000-I/4

2000 48

380-440 3+N* 50 imperial95702185

(195-2000-10002)

SeS-2000-I/5 380-440 3+N* 60 imperial95702186

(195-2000-10003)

SeS-2000-M/4 380-440 3+N* 50 metric95702183

(195-2000-10000)

SeS-2000-M/5 380-440 3+N* 60 metric95702184

(195-2000-10001)

N*=neutral

12

Selcopermaccessories

Brine tanks• fortheproductionofasaturatedsaltsolution.Material:Polyethylene• withwaterinletvalveandgravelbed

type Capacity [kg]

Ø [mm]

Height [mm]

Inlet connection [mm]

outlet connection [mm]

Weight approx. [kg]

order Number

Set-150-S 150 550 644 20 20 3895714317

(195-150S-1)

Set-300-S 300 640 930 20 20 9695714318

(195-300S-1)

Set-500-S 500 790 1035 20 20 15695714319

(195-500S-1)

Set-1250-S 1250 1148 1040 20 20 22095714320

(195-1250S-1)

Product storage tanks• tanksaremadeofPolyethylene,havealevelsensor,andarereadyforconnectionwithSelcoperm• tanksforupto1000litreshaveanintegratedPolypropylenebundwithleakagesensor

type Capacity [l]

Diamater [mm]

Width [mm]

length [mm]

Height [mm]

Inlet connec-tion [mm]

outlet con-nection [mm]

Weight approx. [kg]

order Number

Set-350-P 350 660 800 1160 1200* 32 25 7695714321

(195-350P-1)

Set-501-P 500 800 950 1300 1250** 32 25 9795714322

(195-500P-2)

Set-700-P700

(2 x 350)660 800 1850 1250** 32 25 135

95714323 (195-700P2-1)

Set-991-P 1000 1000 1150 1500 1500** 32 25 14195714324

(195-1000P-2)

Set-1001-P1000

(2 x 500)800 950 2130 1300*** 32 25 162

95714325 (195-1000P2-2)

Set-2000-P 2000 1350 – – 1800 32 32 8195714326

(195-2000P-1)

Set-3000-P 3000 1535 – – 2000 32 32 10795714327

(195-3000P-1)

Set-5000-P 5000 1950 – – 2400 50 50 17095714328

(195-5000P-1)

Set-10000-P 10000 2000 – – 3800 50 50 40895714329

(195-10000P-1)

brine outlet

Product tank with bundBrine tank

softened water inlet

Product tank

inlet connection

outlet connection

*bundheight:450mm **bundheight:500mm ***bundheight:630mm

13

Selcoperm

test kit• fortestingthegeneratedproductbytitrationmethod

Description order No.

Test Kit PWS T1000, comprising:5 pipettes, 1 measuring cylinder, 1 hardness test kit, 1 thermometer, 1 hydrometer, 1 chlorine concentration test kit for product solution, 1 encapsulated instruction sheet, 1 PP carry case

95702376

(553-1750)

acid rinsing set• forcleaningtheelectrolysercellincaseofdeposits

Description order No.

Acid rinsing set comprising a manual acid rinsing pump with hose95702377

(553-1751)

Maintenance kit• includedpartsformaintenanceaftertwoyears(maintenancekitforbrinepump,

set of sealings for Selcoperm)

Description order No.

Maintenance kit gaskets for Selcoperm 125 to 50095702281

(553-240)

Maintenance kit gaskets for Selcoperm 1000 to 200095702282

(553-241)

accessories

Acid rinsing pump

Test kit

14

Selcopermapplication scheme

Drinking water treatment with Selcoperm

legend1 Groundwater2 Measuring system3 Selcoperm electrolytic chlorination system4 Chemical tank5 Oxidation6 Filtration7 Chemical conditioning

12

34

56

7

2

15

Selcoperm

Swimming pool water treatment with Selcoperm

CAN3 - 12 x DIP-A.

PAC NaClO pH

legend1 Swimming pool2 Remotemaintenance,loggingperPC3 DIP compact measuring and control system4 DIT analysing system5 Selcoperm electrolytic chlorination system6 Dosing station for flocculent (PAC)7 Dosing station for hypochlorite8 Dosing station for pH-correction9 Injection units10 Surge basin11 Filter12 Circulating pump13 Sample water feeding line14 Sample water recycling line

1

10

2

5

4

3

6 7 8

9

9

9

11

12

13

14

application scheme

Being responsible is our foundationThinking ahead makes it possible

Innovation is the essence

Subject to change.95701824 1009eN

15.810048 V3.0

Grundfos alldosDosing & Disinfection

www.grundfosalldos.com