AQUABLOC200 Prices Technical

8/13/2019 AQUABLOC200 Prices Technical

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DRINKING WATER REMOVABLE COMPACT UNIT OPERATING INSTRUCTIONS ANUARY 11. 2005/1/35

REMOVABLE COMPACT UNITFOR

DRINKING WATER PRODUCTIONNominal Flow rate: 200 m / hour

PRESENTATION


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CONTENTS

1 - PRESENTATION

1-1-General description1-2-lay1-3-General data and overall dimensions of the different units

2 - PRINCIPLE OF OPERATION2-1-Diagram of operating principle

2-2-Description of the main equipment2-2-1-Pumping unit2-2-2-Settling unit

2-2-3-Intermediate storage tank2-2-4-High lift pumping unit

2-2-5-Filtration unit2-2-6-Chlorination unit2-2-7-Pressure adjustment tank

2-2-8-Technical room

3 - TECHNICAL DESCRIPTION OF OPERATION

3-1-PUMPING PLANT UNIT3-1-1-Principe of operation3-1-2-Harnessing channel

3-1-3-Lifting pit3-1-4-Immersed pump3-1-5-Safeties

3-1-5-1-Level detectors3-1-5-2-Non return valves

3-1-5-3-Manual valves3-1-5-4-Main collector3-1-6-Connection between pumping station and compact unit

3-1-7-Preparation and injection of sulfate of alumina unit3-1-8-Safeties

3-2-SETTLING UNIT3-2-1-Principe of operation

3-2-2-Mixing chamber of waters / sulfate of alumina / chlorine3-2-3-Homogenization chamber

3-2-4-Flocculating chamber by lamella settling3-2-5-Chamber of transfer

3-3-INTERMEDIATE STORAGE UNIT3-3-1-Principe of operation

3-3-2-Main characteristics of this tank3-3-3-High lift pumps

3-3-4-Safeties


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3-4-FILTRATION UNIT3-4-1-Principe of operation

3-4-2-Sand Filters3-4-2-1-Technical characteristics3-4-2-2-Operating cycle

3-4-2-2-1-Filtration sequential operation3-4-2-2-2-Fonction Washing / rinsing3-4-3-Safeties

3-5-CHLORATION UNIT

3-5-1-Principe of operation3-5-2-Technical characteristics3-5-3-Safeties

3-6-PRESSURE ADJUSTMENT TANK ( HYDROFOR)

3-6-1-Principe of operation3-6-2-Technical characteristics3-6-3-Safeties

3-7-TECHNICAL ROOM

3-7-1-Presentation and overall dimensions3-7-2-Setting up intern view (top sight)3-7-3-Different Components

3-7-3-1-Preparation and injection unit of sulfate alumina3-7-3-2-Stocrage of gas chlorine unit

3-7-3-3-Pumps and compressor area3-7-3-4-Control units / dosing / distribution of gas chlorine3-7-3-5-Electrical general switchboard

3-7-3-6-Ventilation of the technical room3-7-3-7-Safeties

4 RECOMMENDATIONS4-1 Concerning the daily control


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1-PRESENTATION

1-1-GENERAL DESCRIPTION

The unit, described in this document is a removable compact unit for the production of drinking waterby collecting it from a river and with a flow rate of 200 m3per hour.

Apart from the pumping station built on site, the unit is delivered under the shape of containers or ofcontainerized equipment conveyed and assembled on the site chosen for the production of drinking

water.

1-2-LAYOUT STANDARD DIAGRAM

River

Pumping station

Pressure adjustment tank( BL1)

Water distribution

Filtration ( F1) D2 D1

Filtration ( F2) settling tank

Filtration ( F3)

Technical Room IntermediateStorage TankLT1 ST1


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1-3- GENERAL DATA

As far as the layout is concerned, the removable compact unit appears under the shape of seven units.The dimensions of which are the following ones :

??2 units length 12 192 mm, width 2 438 mm, height 2 591 mm for both settling tanks (D1, D2);??1 unit length 6 058 mm, width 2 438 mm, height 2 591 mm for the intermediate storage of 35

m3( ST1);??1 unit length 6 058 mm, width 2 438 mm, height 2 591 mm for the technical room ( LT1);

??3 units length 6 058 mm, width 2 438 mm, height 2 591 mm for three elements of finalfiltration (F1, F2, F3).

All these units with accessories represent a total weight of about 60 Tons.

Apart the pumping station located near the river, the containerized unit is laid on a platform (civilengineering) with the following dimensions : 18 meters by 17 meters, that is a surface of 306 m .

2-OPERATING PRINCIPLE

2-1-DIAGRAM OF OPERATING PRINCIPLE

Pumping the water to be

treated in a lifting pit

Contact and settlingIn a lamella system

Storage of the water settled in oneintermediate storage tank and pumping to

Final Filtration in

Sand filters

Analysis of residual chlorineAnd addition if its necessary

pressure control and adjustment

for distribution in"Users network"

Addition of chlorine in aqueous phase in

order to obtain a chloro -sulfate of

alumina

Introduction of sulfate

of alumina


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2-2-DESCRIPTION OF THE MAIN EQUIPMENT

2-2-1- PUMPING STATION

It is located near the river, and it consists of a concrete lifting pit supplied by water catchment pipe.

Two immersed pumps, running in normal/assistance mode and controlled by level controllers ensurethe pumping and the discharge of raw waters to treat towards the containerized treatment unit.

2-2-2- SETTLING STATION

During the first stage of the process, the settling is performed through two lamella settling units of100 m /h each that work in parallel, they are fitted with a homogenization system and withflocculationmade of an addition of sulfate of alumina and chlorine, as well as with a sludge extracting

system.

2-2-3- INTERMEDIATE STORAGE TANK

With a capacity of 35 m3, the intermediate storage tank collects settled waters. It is used as a retention

tank during the starting of the high lift pumps before the final filtration of waters. The volume takesinto account the need of input flow rate of both pumps started simultaneously during the washing/

rinsing operation of the filters.

2-2-4-HIGH LIFT PUMPING STATION

Fitted with two pumps running alternately or simultaneously, this station supplies the sand filters for

the filtration or the washing / rinsing of filters according to the operating mode.

2-2-5-FILTRATION STATION

Fitted with three sand filters, the filtration station proceeds to the treatment of the settled water byeliminating suspension particles up to 25 microns in order to obtain a turbiditylower than 2 NTU.

2-2-6-CHLORINATION STATION

In order to improve the increase the potability of settled and filtered water, dosed chlorine must becarefully added thanks to a chlorination station that distils chlorous gas when required according to

permanent checking. This addition of chlorine enables to avoid water from being re-polluted withbacteria in pipelines. The addition of chlorine in settling tanks may also be required in order toremove bacteria from water and to improve flocculation by chloro-sulfate alumina.


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2-2-7- PRESSURE ADJUSTMENT TANKThe treated water, ready for human consumption, must be supplied by an external network toward theremovable compact unit and requires an inlet in the supplying network with a defined pressure. Asystem called "Hydrophor" enables pressure maintenance of the supplying network, head of network

(5 Bars).

2-2-8-EQUIPMENT ROOMThe water cleansing unit requires numerous checking, dosing, and supplying of varied additives, and

their ordering including varied pumps and booster pumps as well as the storing of aluminate sulfateand of gaseous chlorine are gathered in an only one secured and aerated container called equipment.This room also contains the electric cabinet for control purposes.

3-TECHNICAL DESCRIPTION OF OPERATION

3-1- PUMPING PLANT UNIT

3-1-1-Principle of operation

(111A)

River water lifting manual valve DN 300 main Collector

catchment pit non return valvepipe link pumping unit/

water treatment plant

screenning Immersed Pump

(Channelling in DN150 DN200 DN300)

3-1-2- water catchment pipeDug between the bank of the river and the lifting pit, the water catchment pipe is of a width of about

500 mm and of a height to define site by site according to the high and low levels of the river in thisplace.In order to ensure a good operation of the immersed pumps, the user will have to prevent foreign

bodies from getting into the lifting pit to avoid the obstruction of suction pumps. These foreign bodiescan be varied like floating objects and fauna. As noticed the station has often been stopped because of

the presence of eels or other fishes in pipes and also because of an increase of algae.

It is highly recommended to set up a screening of vertical rollers type (e.g), before the inlet of raw

waters to the lifting pit .


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Plan typifies of installation of harnessing :

River

Water catchment pipe lifting pit

SCREENING

3-1-3-LIFTING PIT

Being a civil engineering structure of approximately 2 m x 2 m and of a depth of 4.5 metres (to be

defined according to location), this pit which volume is about 18 m3 is meant to receive bothimmersed pumps running on normal/assistance mode in order to supply the water cleansing unit.

In this pit, there are 2 level contactors with level switch meant to enable the starting or stopping ofpumps according to the level required. A third identical pump is provided for replacement.

3-1-4-Immersed Pumps

Benchmarked thanks to the symbols P0, P1 and P2on the diagram of principle N 001, thesepumps are fromITT FLYGT Manufacturerand present the following technical characteristics:

electro pump immersed type FLYGTref : BIBO on 2151 MT 241 20.0 kw

HYDRAULIC PERFORMANCES:- - Nominal flow rate : 209,50 m3 / hour- - HMT : 20,00 mcl- - Hydraulic efficiency : 65,60 %

- - Global efficiency : 58,90 %- - Hydraulic absorbed Power : 17,42 KW

- - Electrical Power absorbed : 19,40 KW

TECHNICAL SPECIFICATIONS:Characteristics of electric motor:

- - Nominal Power : 20,0 KW- - Speed of rotation : 2 945 tr/ mn- - Modeof starting up : Direct

- - Voltage / frequency : 400 V threephased/ 50 Hz- - Intensity of starting up : 315,00 A

- - Nominal Intensity : 36,00 A- - Protection : IP68 class FConnecting :

- outlet diameter : 150 mmGuarantees of performances :

- - According to the standard ISO 2548 classifies C, annexes B


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3-1-5-Safeties

3-1-5-1-Level detectors

In order to ensure the operation of the immersed pumps, which accept no vacuous functioning, thelatter are controlled by two level detectors, one benchmarked NB2and called Low level, the other,

benchmarked NH2and called High Level.

These detectors are of level switch type with a breaking capacity of the electrical contact of 18 ( 8 )amps. Their technical characteristics are the following ones :

- Using maximum temperature : 50 C- Degree of protection : IP68

Their function is the following one :

NB2 Low level = Stopping the pump in operationNH2 High level = authorized starting up pumps

3-1-5-2-vallenoid valvesSituated on the outlet circuit of pumps P1 and P2, these non-return valves allow to maintain the

piping in load and to prevent, besides, the driving back of a pump towards the other one.

3-1-5-3-Manual valvesSituated after the non-return valves, these manual valves in DN200 allow to isolate one or both outlet

circuits of the pumping plant for different actions of maintenance of pumps, imperfection of the joints,

etc... .

3-1-5-4-Main CollectorBoth of outlet circuits of pumps P1, P2 in DN150 and DN200,are connected to a collector in DN300

before going to the water treatment unit by a channeling in DN300 called Link between liftingpumping pit /compact water treatment unit

3-1-6-Connection between pumping station and compact unitIt is realized in ductile cast iron pipe in DN 300. This connection pipe has a variable length according

to the pumping place regarding to the mobile compact unit (48 linear meter).

It connects the main outlet collector of pumps P1 and P2 at the settling unit D1, D2.

In the inlet of this last one is installed an electromagnetic flow-meter Q1in DN 150 (reduction

DN300 / DN150) for the control and addition of the inlet flow rate fo the water treatment plant.

The sulfate of alumina, coming from the preparation and injection unit situated in the technical room

LT1is sent up stream to the flow-meter Q1by means of dosing pumps.


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DRINKING WATER REMOVABLE COMPACT UNIT OPERATING INSTRUCTIONS ANUARY 11.2005/10/35

3-1-7- preparation and injection of Sulfate of Alumina unit

Situated in the technical room, it consists of a storage of sulfate of alumina in two plastic containersreferenced B1 and B2, of 1600 liters of unit capacity. Every container is equipped with a mixer, calledrespectivelyAG5 and AG6.

An operator introduces the necessary quantity of sulfate of alumina (bags) as well as the quantity ofnecessary water, taken in exit station (pumps P5 / P6). The set (water & sulfate) is in solution through

the mixers AG5/AG6. The concentration recommended is 200 gr/liter.

The overall dimensions of the containers ( B1 / B2)are : 1085 x 1085 mm, height 1380 mm

The technical characteristics of the mixers" AG5 / AG6 "are the following ones :

MANUFACTURER : DOSAPROType : VDEon 1060 S 130Dimensions

Type of the blades : navy

Diameter of the blades : 160 mmLength of the stalk : 1300 mm

Rotation speed : 1500rpmElectric motor

Voltage supply : 230/400 v

Installed Power : 1.1 kW

Rotation speed : 1500 tr/ mnClass : f IP55

The aqueous solution of sulfate of alumina is pumped in the lower part of each of both containers bymeans of dosing pumps called PD1 and PD2having a rated outlet capacity from 0 to 235 liters per

hour.In running position", only a single set is in operation, the dosing pumps PD1 and PD2workingalternatively, are controlled by the operator.

Technical characteristics of dosing pumps,"PD1 " and "PD2"

Manufacturer : DOSAPROType : GM240-P40-Q3

Electric motor :Voltage supply : 230/400 v

Nominal Power : 0.25 kWRotation speed : 1500rpm

Class : fProtection : tropicalized IP55

Maximum (Output) flow : 240 l/h

Maximum Pressure : 7 Bar


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NB :

For information, considering the temperature of operation, it is necessary to know that the sulfate ofalumina breaks up at 60C. In that case, we advise, if necessary, the use of a flocculant / coagulating

based of talc and called AQUATAL.

By a channeling in DN15, the dosing solution of sulfate of alumina is sent upstream to the flow-meter

Q1.

3-1-8-Safeties (securities)

In each container, is installed a level indicator,(pear type), and mentioned respectivelyNB4 205 andNB5 205.

Their function are the following ones :

NB4 ( 205 ) low level detection in container B1 = STOP mixer AG5

STOP pumps PD1NB5 ( 205 ) low level detection in container B2 = STOP mixer AG6

STOP pumps PD2

The dosing pumps are enslaved to the operation of the immersed pumps P1 and in the following way :

P1 ON starting up PD1authorisedP1 OFF starting up PD1 cancelled

P2 ON starting up PD2authorised

P2 OFF starting up PD2 cancelled


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3-2-2-Mixing chamber : waters / sulfate of alumina / chlorine

Pumped in the pumping pit, the raw water to be treated is directed in a cell called " Mixing chamber".

In this chamber is installed a leading mixer DOSAPRO with helical blades 550 mm in diameter andwith a rotation speed of which is 124 rpm.

This mixer serves for uniting the fluid consisted of some raw water, and the gas chlorine resultingfrom the mixer gas / water MIX 302.

There is one agitator by settling equipment , tracked down under reference AG1for the settling unit

D1 andAG3for the for the settling unit D2.

The technical characteristics of the mixer are the following ones

Manufacturer : DOSAPROType : VREon 2041Dimensions

Type of blades : glide tilted to 45

Diameter of blades : 500 mmLength of the stalk : 1.000 mm

rotation speed : 124 tr/ mn

Electric motorVoltage supply : 230/400 vInstalled Power : 0.55 kWRotation speedine : 1500 rpm

Class :F IP55

The volume of this chamber is 3.5 m3. It is fed by a channeling steel pipe DN250 and its lower partpresents two openings of diameter 250 mm for the water solution mixed towards the homogenization

chamber

3-2-3-The homogenization chamber

Raw waters, added by sulfate of alumina and chlorine, are transferred in the bottom part of the

homogenization chamber by two openings of diameter 250 mm. This chamber is a cell of 20 m3equipped with a mixer equipped with blades of a 1 200 mm diameter and the rotatio n speed of which

is 26 rpm.From DOSAPRO manufacturer and, in case of one mixer by settling unit, these equipments aretracked down on diagram of principle "AG2"for settling unitD1 and"AG4"for settling unitD2.

The mixer allows during the time the water stays in this chamber, to homogenize well the mixturewaters / sulfate of alumina and chlorine before the solution pass through the flocculating and settling

chamber.


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The technical characteristics of the mixer are the following ones :

Manufacturer : DOSAPROType : HM1200 / B115

DimensionsType of blades : profiledDiameter of blades : 1.200 mm

Length of the stalk : 2.050 mmRotation speed : 26 rpm

Electric motorVoltage supply : 230/400 vRotation speed : 1500 rpm

Installed(Settled) Power : 0.37 kWClassify : f IP55

After homogenization, the fluid goes naturally by gravity by the upper part of the wall separation to

the flocculationg and settling chamber

3-2-4-Flocculating chamber by lamella settling

Taking the biggest volume of the settling unit , the cell, said flocculating and settling chamber,mainly consists of a block alveolar type in the upper part and of a collector for introduction of thesludge in the lower part..

This block is sized according to the following characteristics:Width : 2.250 mLength : 6.450 mHeight : 0.820 m

Waters, from the homogenization chamber are transferred by gravity at the bottom of the lamellablock go back up(raise) through this one by the principle of communicating vessels.

The flocculating and settling device is made with an approximate speed for the fluid between 0,8 and

1 m/hour.It is during the passage in the lamella block that slows down the speed of the fluid, which the flocks

and the heavy particles rush downward, and are held(retained) in the canals of racking.

Cleared of most great majority of its sludge and particles, the settled water pours by gravity in the

chamber of transfer.

3-2-5-Chamber of tranferSituated in the continuation of the settling chamber, the chamber of transfer presents a surface of2.250 m on 1.350 m and a height of water of 1.700 m, is a volume of 5 m3.

An exit pipe in DN250, situated partially low of the chamber, allows the supply by hydrostatic

pressure of a storage tank of settled waters ST1.


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3-3-3-High Lift Pumps

In exit of the intermediate storage, settled waters are resumed by pumps P3 / P4 working

simultaneously or in alternate operation according to the sequential needs of the station of filtration.These two pumps are situated in the technical Room LT1.

These pumps have the following technical characteristics:

Manufacturer : ENSIVAL-MORETType : MFR150.125.400

Output flow rate : 200 m3 / hourHMT : 50 mwc

Speed : 1450 rpmEfficiency : 72 %

Absorbed Power : 37.8 kWRequired NPSH : 2 m

Electrical motor :Type : 225 M4

Installed Power : 45 kwRotation Speed : 1450 rpm

Voltage supply : 400/690 vClass : F/BB3

Protection : IP55

3-3-4- Safeties (securities)

NTH2, NH2, NM2 and NB2 level detectors has roles allowing to reassure the intermediate storageby enslaving stops and starting up of the lifting pumps P1 or P2, and the High lifting pumps P3 orP4:

NTH2 Very high detection level = STOP P1 OR P2NH2 High detection level = RESTART P1 OR P2NM2 Average detection level = STARTING UP P3 OR P4

NB2 Low detection level = STOP P3 OR P4


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3-4- FILTRATION UNIT

3-4-1-Principle of operation

In this case, the filtration unit consists of three sand filtersof capacity of filtration of 100 m3 / hourfor every filter. Three filters are tracked downF1, F2, F3.

The principle of operation of a filter is the following one :

Seen in section lateral

1 - Reception of waters to be filtered in canal

2 - Drainage by flood andsupply in surface

3 - Passage (cross) in sand- layer 0.5/1.2mm

4 - Passage (cross) in sand- layer 0.8/2mm

5 - Passage (cross) in sand- layer 1.7/3.15mm

6 Passage(cross) in sand- layer 5/10mm

7 Passage(cross) in a floor with cauls

(System of air blown for wash)

7 - Reception in a collector beforewater distribution towards local network

3-4-2-Sand Filters

3-4-2-1- Technical Characteristics

The filter equipped with sand appears in the form of horizontal cylinder of diameter 2.200 mm and of6.058 mm length, positioned in a horizontal way and set up in a stiff structure of type container. Everyset represents a total weight of 7.670 kg.


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The capacity of the installation requires the presence of three filters working by cycles, either of

filtration, or washing / rinsing (2 in filtration, 1 in washing or in stand-by).

The water to be filtered uses a ramp of distribution in DN250. This channeling is drilled by amultitude of openings in its top to distribute the water on all the surface of filtration.

Different layers of sand, with different aggregate, namely from top to bottom 0.5/1.2 on 300mm, 0.8/2on 300mm,1.7/3.15 on 150mm et 5/10mm on 150mm are arranged on a floor equipped with filteringcauls ( 1004 ).

The water crosses these different layers which insure its filtration and, is collected partially low before

to be sent towards the distributive network by a channeling in DN250.

Between the floor retaining the layers and the receiving tub , is arranged a channeling of air pulsed on

all the length with exits in"T"form, to distribute the air flow and their action of cleaning of the layersof sands without creating of phenomena susceptible to mix the different layers.

In phase of washing, the circulation of the water is made from the bottom to the top.

The distribution of air pulsed done by the compressors S1 and S2appears in broad outline, top sight,

as below :

Distribution cauls

Collector for distribution

The collector is in DN250 and the distribution cauls are in diameter 60 mm with three openings of

diameter 22 mm distributed on the length of the arm.


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Compressors S1 and S2works simultaneously during the cycle of washing / rinsing.

Characteristics of compressors S1 and S2:

Manufacturer : GEFIType : GEFI on 2-65 SH

Capacity : 370 Nm3 / hourPressure : 350 mBar

Electric motorVoltage supply : 400/690 v

Nominal Power : 11 kWRotation Speed : 2930 rpmClass : F Tropicalised

Protection : IP55

Blowing machineSpeed of the blowing machine : 4150 rpmPressure(output) : 1363 mBar

Inlet flow rate : 482 m /h

3-4-2-2- Operating cycle

F1 F1

V1 V3

VP3

P3

F2

VF2 V5 V2

P4 VP4

V6

V4

F3 F3Water circuit

air circuit

S1 VS1 VS2 S2


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3-4-2-2-1- "FILTRATION" sequential operation

P3 VP3 P4 VP4 VF2 V1 V2 V3 V4 V5 V6 S1 VS1 S2 VS2In O Out F O O O F F F F Out F Out F

(In caseP3 is controlled). Idem changing P4instead ofP3)

ON = RunningOFF = Stop

O = Valve openedF = Valve closed

In function "FILTRATION", the duration is determined by the fouling index with a maximum loss of

load of 0.8 Bar.

The output) flow rate is 100 m3 / hour for each filter.

A clock allows to adjust the time of cycle between two washes, which is estimated at 8 hours and

which has to be adjusted according to the suspended solid in raw water.

3-4-4-2-2-2-Fonction"WASHING / RINSING"

The function washing / rinsing is made in a sequential way according to the following operations:

1-Partly sewage(drain)

This sequence aims at unwinding the filter and to drain away the upper part at the level of thecollector to facilitate the sending of the air.

The duration of this sequence is estimated at 1 minute.

2-Send of air

The air from the compressor in operation is uniformly breathed to the collector equipped withdistributions cauls arranged in the bottom of the filter (See drawing in 3-4-2-1-).

It is breathed under the floor, where from the interest of cauls equipped with long tails to obtain auniform mattress.

The air is breathed with a output flow rate of 370 Nm3 / hour and under a pressure of 1363 mBar. Itsoutput flow rate was calculated for 40 Nm3 / hour by m .

The duration of this sequence is estimated at 10 minutes.


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3-Purge of the inflatable mattress

This sequence aims at chasing away the inflatable mattress formed under the floor through cauls.

The importance of this sequence is to avoid creating whirlwinds during the sending of the washingwater and to avoid so the displacement of the layers supports sandy.

The duration of this sequence is estimated at 2 minutes.

4-Washing

This sequence is made by making circulate the water in opposite way to the nominal output flow rateto raise and chase away suspended solids materials in the sewer.

The duration of this sequence is estimated at 8 minutes with a output flow rate , by filter of 100 m3 /

hour.

5-Rinsing

The filter having been washed in the simply settled raw water, the purpose of this sequence is to rinsethe bottom and the collector of exit

The duration of this sequence is estimated at 3 minutes with a output flow rate of 50 m3 / hour.

The sequential operation of valves , V1 to V6, in the function"Washing / rinsing", is the followingone :

valve

SequenceV1 V2 V3 V4 V5 V6

Partial draining F F O F F F

Sending of air F F O O F F

Purge inflatable mattress F F O F F F

Washing F F O F O F

Rinsing O F F F F O


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The distribution of the times of sequences of the cycle is the following one:

Sequence duration

1 Partial Draining 1 minute

2 Sending of air 10 minutes

3 Purge inflatable mattress 2 minutes

4 Washing 8 minutes

5 Rinsing 3 minutes

3-4-3- Safeties (securities)

Pumps P3 and P4being enslaved by level detectors, as demonstrated in the previous paragraph, theoperation of the sequences of filtration, washing / rinsing, is controlled from the general electricalswitchboard which controls the good operation of solenoid-valves and warns of any faults

Every filter is equipped with a air drain which avoids an abnormal increase of the pressure.

3-5- CHLORINATION UNIT

3-5-1- Principle of operation

Before sending the filtered water in the distributive network to the users and to avoid any pollution in

the channeling, this water has to confirm bacteriological requirements what requires to maintain apossible contribution of residual gas chlorine by means of a system of chlorination working according

to the following conditions :

HydrophorPreservation in pressure

Analyze Rate Insufficient Injectionconcentration Residual gas Chlorine

of chlorine

according to standard

The purpose of this unit is double because he allows not only to adjust the concentration of chlorine

in the water filtered before his connection to the distribution network but also to distribute some gaschlorine in the station at the level of the settling unit for sterilization of river waters got before their

treatment.


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The principle of operation of the chlorination unit , situated in the technicalroom, is the following

one :Controller Rate of concentration of Chlorine

Info towards EV3Taken out water filter

P5

P6

Mixer EV2

302

distrib network Mixer EV3

302 EV1

Settling unit 1Mixer

302Settling unit 2

Water

Flow-meter 301 Chlorine Gas

Chlorinated Water

Distributor 303

300 300

Chlorine Chlorine

GAS GAS

Out of supply


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3-6- PRESSURE ADJUSTMENT TANK (HYDROFOR)

3-6-1- Operating PrincipleTo put in adequate pressure the distributive network, it is necessary to adjust the pressure at the head

of network thanks to a system " HYDROFOR " BL1 the principle of operation of which is thefollowing one :

Compressed air

Treated Water

Compressed airColumnControl

LevelWater

208 102208A

116DN32 C1

DN32116 Technical Room

DN150NH3 serves for controlling the high level of the water whereas NB3 serves for controlling the lowlevel of the water.

Equipments 308 and 308Aallow a visual control of the level in BL1.C1is the compressor situated in the technical room and insuring the production of compressed air for

the good operation of the hydroforBL1.During the started of the hydrofor, the pressure of the circuit allows to fill the hydroforand as soon asthe high level of the water NH3 is reached, the compressor C1starts. Conversely, as soon as the

water level NB3is reached, the compressor puts itself in Stop.

The pressure about 5 Bar of the volume of air contained in the hydroforBL1 allows to look an almostconstant pressure in the network by preventing the water treated to go back up in the hydrofor, thevariations of volume of air and water being made by the mattress bounded by the high and low levelsNH3 and NB3.

3-6-2- Technical Characteristics

The hydrophore BL1 consists of a vertical cylinder of diameter 1.600 mm and of a height excepteverything (structure of inclusive base) of 2.985 mm.

Of a empty total weight of 970 kg, and a volume of 5 m3, its envelope is steel galvanizedThe compressed air is distributed from the technical room by means of a compressor C1the technical

characteristics of which are the following ones :

Compressed air

Treated water

NH3 (206)

NB3 (206)


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Manufacturer : AIR STREAM

Type : PIP(TOP) 200/2

Compression mode : compressor with pistonsEngendered Volume : 10.9m3 / hour 182 l / minReal Output flow rate : 6.3 m3 / hour 105 l / min

Pressure : 8 barVolume of tank 3 to 100 litersElectric motor

Power : 0.75 kWVoltage supply : 220 V/ 380 V

Rotation speed : 1400 rpmType of training : coaxial feederClass : tropicalised

Protection : IP54

3-6-3- Safeties

The functions ON and Stopof the compressor are enslaved by the level detectors.

Level NH3 on started Compressor C1

Level NB3 on Compressor C1 stopped

3-7- TECHNICAL ROOM

3-7-1- Presentation and overall dimensions

The basic principle of the unit being the containerized size, the technical room appears under the shapeof a container at the following dimensions:

Length : 6.058 mm

Width : 2.438 mm

Height : 2.591 mmThe surface in the floor is divided into cells separated by partitions and what we can define accordingto their feature namely:- Storage / dosing / distribution Sulfate of alumina

- Storage Gas Chlorine- Machinery (pumps/ /compresseur/air blower)-Electricity-Dosing/Distribution of chlorinegas

Everything around this container are arranged all connectings devices and supports necessary for thedifferent energies, chlorine gas and water.


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3-7-2- Setting-up intern view ( top sight)S1 S2

EX2

P3 P4

C1

P5

P6

EX1

Electric switchboard

Chlorine gas

Sulfate of Alumina

AG5 AG6

B1 B2

PD1 PD2


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Air blowers S1 and S2are assembled in superimposing on a skidfixed to the ground of the container

with air inlet outside. As regards their technical characteristics,please refer to the paragraph 3-4-2-1-.Pipes link them with the system of aeration of filters F1 /F2/F3 for their cleaning.

Arranged on each side of the room the high lifting pumps P3 and P4are linked through the wall with

the intermediate storage ST1and their outlet piping are arranged for their connecting in filters F1/F2/F3. The technical characteristics of pumps P3 and P4are enumerated in the paragraph 3-3-3.

Positioned against the wall above the pump P3, the compressor C1 is intended to produce thecompressed air necessary for the good operation of HydrophorBL1. The technical characteristics of

the compressor C1are enumerated in the paragraph 3-6-2.

3-7-3-4-control units / dosing / distribution of gas chlorine

Situated near the storeroom of chlorine gas, this installation mainly consists of piping, solenoid valvesEV1 / EV2 / EV3 and pumps P5 / P6, the technical characteristics of which were mentionned in the

paragraph 3-5-2-. The controlling of these motors and solenoid valves is made from organs ofcontrol, distribution and dosing such :

Analyzer see technical documentation ALLDOS in file N1Flow-meter see technical documentation ALLDOS in file N1

Distributor see technical documentation ALLDOS in file N1

3-7-3-5-Electrical general Switchboard

This unit of control and supervision is situated in the area Air blower/ pumps / Compressor.The

general switchboard allows to control, and to feed all the equipments.

,Its overall dimensions are : :Height : 2.000 mmWidth : 1.600 mm

Depth : 370 mm

Both opening panels composing its front view contain all the visual elements for controlling allrunning or stop state or faulty alarm as well as the display(visualization) of the cycles in the operationof sand filters.

To respect the breaking capacity of the electrical equipments, the preservation in maximum

temperature of 35 / 40C, is obtained by a heat exchanger Air / water situated opposite before right-hand side of the switchboard.

Following both pages present elements arranged on each of both panels of the front door as frontview, the right panel and the leftpanel.


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Left panel on front doorVoltmeter Switch of Voltemeter Electrical panel Switch Ammeter Ammeter

Pump P 1 Pump P 2 Air blower S1 Air blower S2 Filter/Wash pump P3 Filter/Wash Pump P4

A A A A A A

On Defect On Defect On Defect On Defect On Defect On Defect

Auto Off On Auto Off On AutoOff On AutoOff On AutoOff On Auto Off On

Mixer AG5 Mixer AG6 Mixer AG1 Mixer AG2 Mixer AG3 Mixer AG4On Defect On Defect On Defect On Defect On Defect On Defect

On Off On Off On Off On Off On Off On Off

Detection level river Detection level intermediate storage tank ST1 Detection level Hydrofor Flocculant B1 Flocculant B2

Low level High level Low level Mean level High level Very high level Low level High level Low level High levelNB1 NH1 NB2 NM2 NH2 NTH2 NB3 NH3 NB4 NB5

Pressure switch Chlorine analyser Escape of chlorine Detector of escape External lighting Flowmeter Pressure switch Electric valvesPS1 CL2 DT1 ECL PS2

Defect Defect Low level Defect Defect Defect Alarm Defect

Test lamps General Defect Emergency stop Siren Stop siren

Electric socket 24 VElectric socket 400 V

Electric socket 230 V

0 0 0 0 0 0 0 0 0 0 0 00 0 00 0 0


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3-7-3-6-The ventilation of the technical room

As already developed previously, the technical room is divided into three very different areas some ofthe others.

Every area has a simple door of easy access (storage of chlorinate gas and Pumps/Compressor/ Airblowers area) or double doors (for the storage of the sulfate of alumina).

Concerning the ventilation of the storage of chlorine gas, it was arranged a railing of air inlet of 400 x600 mm in the lower part of the door and an extractor EX1in the upper part of the door.

This extractor has a capacity of extraction of 900 m3 / hour. its technical characteristics were already

specified in 3-7-3-2-.

The area of storage and distribution of sulfate of alumina contains no mechanical ventilation but its

two doors are equipped, each, with two railings grids (air inlet and outlet )of 400 x 600 mm.

The third area containing Air blowers/Pumps/Compressor and the electric general switchboard isventilated from two railing grid of air inlet of 400 x 600 mm situated on the access door and oneextractor EX2situated on the partition opposite to the access door

This extractor has the same capacity of extraction (900m3 / h) and the same characteristics as the

extractor EX1.

3-7-3-7-The safeties (securities)

The conception of the electric switchboard and its components allow to control the faults of operationof the installation by forbidding started auxiliaries and by showing the noticed defects.

The use of gas chlorine required the installation of a leak detector of gas (DT1) and any suspectdetection pulls an alarm according to a siren. Of more a mask is given to the staff in this area Air

blower/Pumps/Compressor .


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4 RECOMMENDATIONS

4-1-Concerning the daily control

To insure a high level ,of accuracy of the installation, daily, we recommend the following actions :

A - TECHNICAL ROOM

- Control visually that the installation presents no defect by a simple glance on the doors of the

general switchboard ,

- Make sure of the normal ventilation of the technical room with visual check that no plastic or otherbag is applied against the railing grid of air inlet ;

- Control the rate of concentration of the sulfate of alumina and verify the levels of storage toanticipate the renewal ;

- Control the state of stock of the bottles of gas chlorine to order their renewal ;

- Verify that no leak of water or air inside the technical room;

B - REST OF THE INSTALLATION

- Verify that no important residue blocks the entrance(entry) of the canal of harnessing from the riverwaters and to loosen them in case of presence ;

- Verify the absence of residue like plastic, animal, other bags) in the lifting pit which would havebeen able to be deposited by the wind for example and being able to pull one closing of pumps ;

- To verify the absence of leaks whether it is on the outside walls of the settling, intermediate storage

or sand filters as well as on the connection pipes (PVC, PEHD, Steel);

- Verify visually containers "open top " (settling units, intermediate storage) to make sure that noatmospheric pollution is put down;

C - HOLDING OF AN EXPLOITATION AND OPERATION BOOK

- Any problem or noticed defect must be recorded on an Maintenance book of exploitation to beable to make of the prevention ;

- Record quite the operations of maintenance necessary for the normal operation of the installation(start/end and description of the works with renewal of spare parts);

- Record the evolution of the different rate of concentration of the sulfate of alumina or some chlorine

in order to optimize so the consumption of reagent.

AQUABLOC200 Prices Technical

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