selcoperm electrolytic chlorination system systems/selcoperm ele… · the best prevention of...
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GRUNDFOS allDOS Data Booklet
Selcoperm electrolytic chlorination system Reliable and easy generation of a hypochlorite solution
for disinfection applications
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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
�. 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
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 and 8.5, 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 � ppm chlorine equivalent.
cathode anode
NaCl +H2O
NaClOsolution
H2
H2ONaCl
NaClO
H+
NaOH
Na+
OH–
Cl2
Cl–
the benefits of the Selcoperm electrolysis method• Common salt is the base material – it is nontoxic and easy to store.
• Only water, common salt and electricity is needed for the electrolysis – low operating costs, world-wide use.
• Fresh hypochlorite is always on hand – the disinfectant solution does not dissociate like commercial hypochlorite solutions. Lower formation of chlorate as a by-product.
• Approved disinfection method complying with the DWI drinking water regulations – an alternative with less safety requirements to chlorine-gas-based systems.
• Robust and elementary components – low-maintenance and a long service life, compared with the membrane cell electrolysis.
• 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
• drinking water treatment
• swimming pool water treatment
• industrial treatment for cooling towers or process water.
The systems are an excellent alternative to chlorine-gas or commercial hypochlorite applications.
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SelcopermRequirements
Installation scheme of a Selcoperm system in a room
Requirements for the installation
Water • Good water quality, preferably drinking water
• Supply pressure range: from �.5 to 10 bars. For lower water pressures, booster pumps are available.• Water inflow temperature must be in the range of 5 °C to �0 °C.
Water consumption max. 1�5 litres per kg of prepared chlorine
Salt • Food-grade common salt (DIN 1960�)
• For drinking water disinfection, salt with a low bromide concentration must be used (max. 0.01%)
Salt consumption 3 to 3.5 kg of salt per kg of prepared chlorine
electrical connection 185 to �65 V or 380 to ��0 V; 50/60 Hz
Power consumption approx. �.5 kW per kg of prepared chlorine
Drain An on-site drain for the regeneration water of the water softener is necessary.
exhaust air • The outlet of the exhaust air has to be as close as possible to the electrolytic chlorination system.• In addition, natural air supply via a ventilation hole in the room is required.
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 3� 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 salt solution has to be at least 100 mm above the inlet for the salt solution at the system.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 level natural ventilation.
0
1
min
.10
0 m
m
min. 50 cm min. 50 cm
max.30 cm
3
2
E16
5 5
B4
A D
C
Components of the installation:
a Selcoperm electrolytic chlorination system
B Brine tankC Product tankD Dosing pumpse Vent tubing
5
Selcoperm
Selection diagram
Structure of a Selcoperm systemSelcoperm unit comprises 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 is 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 amount of NaClO buffer storage required. The sizing of the brine tank also depends on the space available and on the salt filling option: manual or automatic.
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).
Dosing quantity in mg/l
Water flow (log)
Corresponding chlorine quantity
Selcoperm �000
Selcoperm 1000
Selcoperm 500
Selcoperm �50
Selcoperm 1�5
Information on larger or smaller capacities available on request.
6
SelcopermStructure
Structure of a Selcoperm system (description see pages 6 - 8)
electrolyser cell and hydrogen degassing column
• Installed in a separate chamber with a quantitatively monitored air flow• Electrolyser cell (1) in a vertical transparent PVC pipe for easy process monitoring and visual electrode check• Electrodes are made of titanium carrier material with a very durable catalytic metallic oxide coating, also suitable for cold water
applications of 5 °C and higher.• The hydrogen degassing column (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
• Grundfos Alldos dosing pump (3) with a wide adjustment range for precise dosing of the salt solution
• Flow meter (4) with switch for safe process interruption, if the value falls below its critical minimum
• Water flow valve (5) for the reproducible adjustment of the dilution ratio
• Adjustable pressure reducing valve (6) with pressure reading for the water supply
• Continuously operating water softener system (7) for the reduction of the water hardness to below �0 mg/l (CaCO
3)
• Sample valves for softened water (B), brine solution (C) and product solution (D)
Control system
• Lockable control panel (10) IP 55 with integrated water cool-ing for the high-performance electronics
• Display with presentation of system status, amperage, volt-age, service hours and temperature of the electrolyser cell
• Functions: automatic tank refilling, manual system shutdown or remote Off
• Potentiometer for voltage adjustment (11)• Display of error messages: current too high, current too low,
overtemperature electrolyser cell, leakage, overtemperature electronics, ventilation error, water flow error.
• Potential-free alarm contact
Ventilation
• Air dilution fan with flow rate indication (12)• Forced ventilation in the electrolyser chamber. At the vent
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
13 F
10
12
13
3
9
4
5
8
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SelcopermStructure / Measurements
Structure and measurements of a Selcoperm system
View left side View right side
Measurements in mm
legend1 Electrolyser cell� Hydrogen degassing column3 Dosing pump� Water flow meter5 Water flow valve6 Pressure reducing valve7 Water softener8 Level sensor9 Non-return valve10 Control panel11 Potentiometer for voltage control1� Air dilution fan13 Exhaust system with air flow meter1� Drain plug
D Outlet: product to storage tankF Vent discharge outlet
1800
950 (125 - 500)
1050 (1000 - 2000)18
00
950 (125 - 500)
1050 (1000 - 2000)
13 13
10 10
12 12
1
2
3
4
5
9
8
F F
D
13 13
6 7
8
Selcoperm
Connections
Connection Internal diameter
metric imperial
Water Inlet (A) �0 mm 1/�”
Softened water outlet (B) �0 mm 1/�”
Brine solution inlet (C) �0 mm 1/�”
Product outlet (D) 3� mm 1”
Rinsing water outlet (E) 3� mm 1”
Vent discharge outlet (F) 90 mm 3”
Measurements
Measurements in mm
1800
700
Measurements of a Selcoperm system
700
1800
Front viewBack view
D
e
13
C
B
a
legend10 Control panel11 Voltage controller1� Air dilution fan13 Exhaust system1� Drain plug
A Water Inlet
B Softened water outlet
C Brine solution inlet
D Product outlet
E Rinsing water outlet
F Vent discharge outlet
13
10
12
14 14
11
FF
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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
1�5 1�5 g/h �50 �50 g/h 500 500 g/h1000 1000 g/h�000 �000 g/h
Connection
I imperialM metric
Supply voltage
H 95-1�0 V / 50-60 Hz1 ��0-�60 V / 50 Hz6 ��0-�60 V / 60 Hz� 380-��0 V / 50 Hz; 3+N*5 380-��0 V / 60 Hz; 3+N*
N* = neutral
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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
1�5 3
��0-�60 1 50 imperial95702180
(195-125-10003)
SeS-125-I/6 ��0-�60 1 60 imperial95702181
(195-125-10004)
SeS-125-I/H 95-1�0 1 50-60 imperial95702182
(195-125-10005)
SeS-125-M/1 ��0-�60 1 50 metric95702167
(195-125-10000)
SeS-125-M/6 ��0-�60 1 60 metric95702178
(195-125-10001)
SeS-125-M/H 95-1�0 1 50-60 metric95702179
(195-125-10002)
SeS-250-I/1
�50 6
��0-�60 1 50 imperial95702192
(195-250-10003)
SeS-250-I/6 ��0-�60 1 60 imperial95702193
(195-250-10004)
SeS-250-I/H 95-1�0 1 50-60 imperial95702194
(195-250-10005)
SeS-250-M/1 ��0-�60 1 50 metric95702189
(195-250-10000)
SeS-250-M/6 ��0-�60 1 60 metric95702190
(195-250-10001)
SeS-250-M/H 95-1�0 1 50-60 metric95702191
(195-250-10002)
SeS-500-I/1
500 1�
��0-�60 1 50 imperial95702200
(195-500-10004)
SeS-500-I/6 ��0-�60 1 60 imperial95702201
(195-500-10005)
SeS-500-I/4 380-��0 3 + N* 50 imperial95702202
(195-500-10006)
SeS-500-I/5 380-��0 3 + N* 60 imperial95702203
(195-500-10007)
SeS-500-M/1 ��0-�60 1 50 metric95702196
195-500-10000
SeS-500-M/6 ��0-�60 1 60 metric95702197
(195-500-10001)
SeS-500-M/4 380-��0 3 + N* 50 metric95702198
(195-500-10002)
SeS-500-M/5 380-��0 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 ��
��0-�60 1 50 imperial95702171
(195-1000-10004)
SeS-1000-I/6 ��0-�60 1 60 imperial95702172
(195-1000-10005)
SeS-1000-I/4 380-��0 3 + N* 50 imperial95702173
(195-1000-10006)
SeS-1000-I/5 380-��0 3 + N* 60 imperial95702174
(195-1000-10007)
SeS-1000-M/1 ��0-�60 1 50 metric95702205
(195-1000-10000)
SeS-1000-M/6 ��0-�60 1 60 metric95702168
(195-1000-10001)
SeS-1000-M/4 380-��0 3 + N* 50 metric95702169
(195-1000-10002)
SeS-1000-M/5 380-��0 3 + N* 60 metric95702170
(195-1000-10003)
SeS-2000-I/4
�000 �8
380-��0 3 + N* 50 imperial95702185
(195-2000-10002)
SeS-2000-I/5 380-��0 3 + N* 60 imperial95702186
(195-2000-10003)
SeS-2000-M/4 380-��0 3 + N* 50 metric95702183
(195-2000-10000)
SeS-2000-M/5 380-��0 3 + N* 60 metric95702184
(195-2000-10001)
N* = neutral
1�
Selcopermaccessories
accessories
Salt tanks• for the production of a saturated salt solution. Material: Polyethylene• with water inlet valve and gravel bed
type Capacity Diameter Height order Number
[kg] [mm] [mm]
Set-120-S 100 500 77095702177
(195-100S-1)
Set-330-S �00 650 1��095702188
(195-200S-1)
Set-1180-S 800 1050 150095702234
(195-800S-1)
Other tank sizes on request.
Product storage tanks• with integrated bund, leakage and level sensor, ready for connection with Selcoperm. Material: Polypropylene
type Capacity Width Depth Height order Number
[l] [mm] [mm] [mm]
Set-200-P �00 1100 780 60095702187
(195-200P-1)
Set-300-P 300 1100 780 60095702195
(195-300P-1)
Set-500-P 500 1300 900 60095702235
(195-500P-1)
Set-600-P 600 (� x 300) 1800 780 60095702236
(195-600P2-1)
Set-990-P 1000 1500 1150 65095702175
(195-1000P-1)
Set-1000-P 1000 (� x 500) �1�0 900 60095702176
(195-1000P2-1)
Other tank sizes on request.
Product tank with bundBrine tank
Outlet brine solutionØ �0 mm
Inlet softened waterØ �0 mm
Supply connection Ø 3� mmDrain connection � x Ø �5 mm
13
Selcoperm
test kit• for testing the generated product by titration method
Description order No.
Test Kit PWS T1000, comprising:5 pipettes, 1 measuring cylinder, 1 hardness test kit, 1 thermometer, 1 hydrometer, 1 encapsulated instruction sheet, 1 PP carry case
95702376
(553-1750)
acid rinsing set• for cleaning the electrolyser cell in case of deposits
Description order No.
Acid rinsing set95702377
(553-1751)
Maintenance kit
Description order No.
Maintenance kit gaskets for Selcoperm 1�5 bis 50095702281
(553-240)
Maintenance kit gaskets for Selcoperm 1000 bis �00095702282
(553-241)
accessories
1�
Selcopermapplication scheme
Drinking water treatment with Selcoperm
legend1 Groundwater� Chemical tanks3 Measuring system� Selcoperm electrolytic chlorination system5 Oxidation6 Filtration7 Chemical conditioning
1
2
3
4
56
7
2 4
3
15
Selcoperm
Swimming pool water treatment with Selcoperm
CAN3 - 12 x DIP-A.
PAC NaClO pH
legend1 Swimming pool� Remote maintenance, logging per PC3 DIP compact measuring and control system� 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 Filter1� Circulating pump13 Sample water feeding line1� 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 0608eN
15.810048 V2.0
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