MLS-ESP-024A Waste Air Ducts%

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PROJECT:

DOCUMENT TITLE:

DESCRIPTION

FIRST ISSUE PELR LLBZ RAAI

REV.

A

R. ARDESTANI

27/05/2010

-

S10 NMO 015

APPR.

KINGDOM OF SAUDI ARABIA

P. LECARPENTIER

L. BARDEZ

MLS-ESP-024

DATE

SOUTH OF JEDDAH

AL KHUMRA MAIN LIFT STATION

PRELIMINARY DESIGN

DOCUMENT N:

Tel.: (33-1) 0146.14.71.00 Fax : (33-1) 01.47.24.77.88

WASTE AIR DUCTS

27/05/2010

PREP. CHECK.

REVISION:

Parc de l'Ile - 15/27, rue du Port - B.P. 727 - 92007 Nanterre Cedex

PREPARED:

CHECKED:

APPROVED:

DATE:

SCALE:

PROJECT N:

A

FILE:MLS-ESP-024A Waste air ducts


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SUMMARY

page

1 - Location / Purpose / Quantity 3

2 - Environment 4

3 - Process data 5

- Field of application 5

- Sizing data 5

- Terms of service 5

4 - Ducts 5

5 - Balancing volume dampers 6

6 - Control volume dampers 6

7 - Louvres 6

8 - Inspection, maintenance and cleaning of duct network 6

9 - Drawings 7

10 - Operating philosophy 8

11 - Guarantees / Other specifications 8

- Guarantees 8

- Other specifications 8

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MLS-ESP-024

WASTE AIR DUCTS

AL KHUMRA MAIN LIFT STATION PRELIMINARY DESIGN

27/05/2010

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1 - Location / Purpose / Quantity

Localisation Main Lift Station

Odour treatment building

Purpose Transfert waste air from polluted chambers to odour

treatment

Quantity of equipment

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2 - Environment

Outdoor

Indoor, ventilated

Outdoor, under cover

Outdoor temperature

Lower C

Higher C

Indoor temperature C

Relative humidity

Lower %

Higher %

Corosive atmosphere: yes no

Dusty atmosphere: yes no

Explosive area: yes no

Altitude: .. m

Sandstorm: yes no

Seaside: yes no

Presence of hydrogen sulphide: yes no

Presence of chloride: yes no

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5,18

50

100

25


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3 - Process data

- Field of application

Waste air blowing

- Sizing data

Static pressure Maximum 2 000 Pa

- Terms of service

24 hours/day

7 days/week

Automatic control.

4 - Ducts

Ducts shall be HDPE or PVC

Duct air speed (in accordance with INRS recommandations)

MLS-ESP-024

WASTE AIR DUCTS


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Diameter

mm

Flow

m/h

Flow

m/s

Diameter

mm

Flow

m/h

Flow

m/s

Diameter

mm

Flow

m/h

Flow

m/s

DN 100 100 3,8 DN 355 2 200 6,3 DN 710 11 200 8,4

DN 125 190 4,2 DN 400 3 000 6,5 DN 800 16 000 9,0

DN 160 320 4,5 DN 450 4 000 7,0 DN 900 21 000 9,4

DN 200 550 5,0 DN 500 5 200 7,2 DN 1 000 26 000 9,8

DN 250 1 000 5,5 DN 560 7 000 7,8 DN 1 120 35 000 10,2

DN 315 1 600 6,0 DN 630 9 000 8,2 DN 1 250 45 000 10,6


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Construction Ducts are primarily circular section, which ensures a better

mechanical resistance to pressure or vacuum, and betteraerodynamics profile.

Ducts will be stiffened in order not to deform under pressure

or vacuum. Deformation shall be less than 1%

Installation The materials will be adapted to the location and the possibilities

of supporting from the concrete structure, ceilings, walls or floor.

The distance between 2 stands must be such that the duct

does not suffer any deformation regardless of the type of stands .

All accessories (dampers, valves, taps, ...) will be supported at

each end. The ducts should be supported every 2.50 m with

collars and stainless steel threaded rods.

Materials used will be stainless steel and plastics.

Interpose flexible joints between the supports and duct.

5 - Balancing volume dampers

Balancing volume dampers shall be provided where flow rates in ducts must be adjusted.

Dampers shall be made of the same kind of material as that of the ducts, and where it is not applicable

they shall be made of stainless steel. For every pump sump, a balancing volume damper shall be

provided on all exhaust ducts. Balancing dampers shall be motorised so that they can be closed when

not in use and open to their preset position when resuming operation.

6 - Control volume dampers

Motorised volume dampers shall be provided on fresh air supply ducts and exhaust air ducts

so as to extend control range of air flow rate or pressure. Like Variable Speed Drives

the motorised volume dampers shall be controlled by the PLC

Each motorised damper shall be bypassed by a manual volume damper of smaller size.

7 - Louvres

Louvers shall be sized to meet the maximum air flow requirements. They shall be provided with

volume dampers where required.

8 - Inspection, maintenance and cleaning of duct network

Realization of hatches in sufficient quantity

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Traps will be placed judiciously:

On straight ducts

Near the elbowsUpstream and downstream of a damper

On plenums.

They will be built with the same material as the ducts and the same thickness.

9 - Drawings

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10 - Operating philosophy

Fans are driven by frequency converters. Variable Frequency Drives

They maintain a low pressure in the plenum: 500 Pa below atmospheric pressure

11 - Guarantees / Other specifications

- Guarantees

The equipment will be guaranteed two years against defects in design, manufacture or

installation.

Special guaranty against corrosion (5 years for coating)

- Other specifications

The product shall comply with the general requirements.

On-site installation.

Ten years spare parts list.

Manufacturer documentation: dimensional drawings with loads, electric schemes,

Operating and Maintenance Manual.

Test reports.

Certificate of compliance.

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MLS-ESP-024

WASTE AIR DUCTS


27/05/2010

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MLS-ESP-024A Waste Air Ducts%