SECTION STAINLESS STEEL INCLINED PLATE SETTLERS

lovinggudgeonMécanique

22 févr. 2014 (il y a 3 années et 10 mois)

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1

SECTION


STAINLESS STEEL

INCLINED PLATE SETTLERS


PART
I GENERAL





This section covers the
technical specifications for
inlet
infusers
,
inclined plate

settlers, baffles,

flow control de
ck, effluent troughs and appurte
n
an
ces for a

complete working syst
em.


1.1 Work

Included



A.

Under this section of the specification, the contractor shall provide and install



the sedimentation equipment for the pre
-
treatment facility, including inclined



plate settlers
, inlet infusers, collection troughs and suppo
rts

as shown in the




contract drawings and as described herein.



B.

The sedimentation equipment shall include, but not be limited to, inclined plate

settlers with integrated side baffles, flow control deck, collection launders,
support structures, end

baffles, inlet
in
fusers, mounting brackets, anchor bolts

and fasteners, and related appurtenances. This equipment shall be provided as

an integral package by a single manufacturer who shall take responsibility for

coordination of
all components

to assure
proper functioning of the sedimentation

equipment as a system.


1.2 Related

Work


A.

Flocculation baffles

B.

Flocculators

C.

Sludge Collectors


1.3
Submittals



A.

The contractor shall provide product data, drawings and calculations as follows:




1.

Basic design, la
yout, including inlet
arrangement (
baffles/in
fusers), plates





effluent laund
ers, weirs, and support structures.




2.

Design velocities including inlet velocity, velocity at
inlet
in
fusers, velocity




through plates, velocities at flow control points a
t top of plates and at inlet to




trough and velocities

in trough
s




3.

Head loss calculation through plate settling units at maximum/average design



flow.


2




4.

A statement of the terms of the warranties.




5
.

List of spare parts which should be p
urchased and kept on hand.




6
.

All ancillary equipment to be provided by the manufacturer shall be listed.




7
.

Complete shop drawings of all equipment furnished including cut
-
sheets





describing sub
-
components with the specific components highlighte
d.




8
.

Operation & Maintenance Manuals


1.4 Storage

Protection



Equipment shall be stored and protected in accordance with the manufacturers


recommendations.


1.5
Delivery



A.

Plate packs shall be shipped on flat bed trucks to allow access by crane





provided by the contractor.






B.

If access by crane to the basins is not possible, then the plate settlers shall be

shipped

as a pack which can be disassembled for individual component
installation
.



1.6
Skilled Supervision


A.

Manufacturer shall
have avai
lable

skilled installation, supervision and start
-
up
services as specified.


1.7 Supplier

Qualifications and Experience



A.

Manufacturer shall have been in continuous business for a period of at least 10



years, engaged in the manufacture of water treat
ment equipment for






municipalities. Said manufacturer shall have
at least 10 years

experience in the



design and building of high rate lamin
ar flow clarification equipment.




B.

Prior to bid each m
anufacturer must
provide a list of at least ten

(
1
0
)






installations of all
stainless steel plate settlers used in municipal applications




along with names and phone numbers of references to be contacted. A list of



FRP plate installations will not be acceptable.




C.

Manufacturer
must provide
a certificate of NS
F

standard

61 certification of the



proposed
s
tainless steel inclined plate settlers.
NSF approval on the material by


3



itself is not acceptable.

Said certificate must accompany

the manufacturer’s bid



package to the contractor befo
re bid opening.



D.

Any manufacturer bidding alternate un
-
named items of equipment shall provide



a written indemnification against patent infringement to the owner.


1.8
Guaranties



A.

The manufacturer of the plate settler shall guarantee all componen
ts provided by


said manufacturer including buy
-
out items

not manufactured by said






m
anufacturer for a period of twelve (12) months, commencing from the date the



equipment is put into service, or eighteen (18) months from delivery of the





equip
ment, whichever is shortest.



PART 2


PLATE SETTLERS
:




This section covers the individual components which make up the plate settler



system.


2.1
Design & Scope of the Work



A.

The work includes the supply, delivery, supervising the installation,







commissioning, and training in use and maintenance of the plate settler
s.





B.

The basins shall be in number and dimension as shown in the contract drawings



and as specified herein.




C.

The manufacturer shall provide plate settling equipment that
will provide the




maximum settling performance
.





D.

The inclined plate settler system shall comprise the following elements:




1.

Stainless steel

plates and frames with integral side baffles.



2.

Stainless steel e
ffluent collection troughs

with adju
stable weirs
.



3
.

Stainless steel e
nd baffles
.



4
.

Stainless steel
Inlet
in
fusers
.



5
.

Stainless steel support beams

which span the basin to support the ends of




the plate packs. Said beams shall be provided by the manufacture of the





plate settl
ers.



6.

All wall mounted brackets as required.








2.2
Acceptable Manufacturers



4


A.

The plate settler shall be manufactured by Meurer
Research
, Inc. of






Colorado.




B.

To assure system integrity and responsibility, all items of equipment described in



this section shall be manufactured by a single manufacturer regularly engaged in


the production of this equipment.


2.3
Process Requirements/Conditions (Any blanks to be filled in by manufacturer)



A.

Design flow (process)






___________


B.

Maximum f
low (Hydraulic)





___________


C.

Maximum Influent Turbidity




___________


D.

Average Influent Turbidity





___________

E.

Required Effluent Turbidity





___________

F.

Effectiv
e Rise Rate (Hazen velocity)


___________

G.

Allowed Plate Efficiency





____
__
___
__


H.

Angle of Inclination







______
___
__

I.

Effluent Trough Loading





___________

J.

Design Velocity between plates



___
________

K.

Design Velocity in Feed Channels


___________

L.

Number of Basins







___________

M.

Dimension of Basins






___________

N.

Number

Rows per Basin





___________

O.

Number

Plates per Row





___________


2.4
Inlet System



A.

The plate manufacture shall provide an effective inlet diffusion system to reduce



the velocity to
less than

.5 ft. per second when entering the feed flumes o
f the



plate

settlers.




B.

The inlet velocity shall not exceed 2 ft
. /
second in order to prevent floc damage.


2.5
Plates



A.

The plate settling units shall operate in counter
-
current mode with clarified water

flowing upward while settled solids move do
wn. The incoming water shall be

fed

near the lower end of the plate from the side to allow the settled solids to fall to


the floor of the clarifier without being re
-
entrained by the incoming flow.



B.

The plates shall be arranged in packs
.

The packs shall
be installed on cross
beams provided by the manufacturer.


C.

The incoming water shall be fed near the lower end of the plate from the side to
allow the settled solids to fall to the floor of the basin while minimizing re
-
entrainment by the incoming flow.


5



D.

T
he plates shall be inclined at an angle of 55° from the horizontal. The plate
settlers shall have no moving parts.



E.

The effluent
flow
at the top of the plate shall be removed in at least four (4)
points to insure even distribution across the full width of

the plate.

Plate settlers
with
less than four (4)

take off point
s

per plate
are not acceptable.


F.

The plates shall be removable individually for
inspection

or repair and to ease
initial installation.
No

structures or troughs
shall

be
required to be remove
d in
order
to
extract

the plates.

The effluent troughs shall be located to the side of the
plate rows.



G.

If each plate has a tubular top support structure, the plate shall be manufactured
of 24 gauge (minimum), T
-
304 stainless steel. If each plate does not

have a top
tube, then plate material shall be 22 gauge, T
-
304 stainless steel. FRP
(fiberglass) will not be accepted.



H.

The plate
packs

shall
be self supporting and shall
not exceed the maximum
allowable deflection limits stipulated below.


I.

The plate sett
lers shall be designed so that an operator may walk out onto the
plates at any time, even during operation, without the need to remove any
components.
The entire top of each plate settler must be visible for inspection.
Local OSHA regulations should be fol
lowed.



J.

The plates shall be designed structurally for the following conditions:


1.

Loading of
3
0 lbs. per
plate

live

l
oad.


2
.

A maximum deflection of 1/360 for all structures, troughs, etc.


3
.

A concentrated load of 250 lbs. anywhere on the flow deck (t
op tubes) or top



edge of plates.


2.6 Effluent

Collection Troughs


A.

The effluent troughs shall be located to the
side of the plate rows. Troughs
located over the plate settlers obstructing access to the tops of the plates will

not

be

accepted.


B.

The effluent collection troughs shall be manufactured of T
-
3
04

stainless steel.
All brackets trough supports, reinforcing sections, stiffeners, flanges
, weirs

and
fasteners shall be of
T
-
304
stainless steel.





6

2.7
Structural Support System Requi
rements



A.

The manufacturer
o
f the plate settlers
shall provide stainless steel beams to




support the plate

settler packs to insure compatibility
.




B.

Support frames and beams shall be adequately sized to carry the load of the




p
l
ate settling syst
em under both wet and dry conditions without exceeding a




maximum deflection
of L
/360 of the span.


C.

The manufacturer will be required to coordinate the structural details of the
design with the engineer
.

This will be required to determine the final loc
ation of
beams t
h
rough wall openings, sludge collection mechanism and other design
details which may affect the supply of structural support components.



END OF SECTION