in-ground cpi issue 04 - krofta engineering stetfield in-ground.pdfwater bypass channel, ... (trash...

IN-GROUND

APPLICATIONS Oily wastes and rainwater run-off streams at oil refineries, power stations, rail yards, maintenance depots, transport depots, industrial sites, waste treatment facilities, oil storage sites and onshore bilge and ballast treatment. In fact, any place where free oil contamination is a problem. The units may used as pre-treatment to further processes such as dissolved air flotation or biological treatment and should be selected where especially stringent effluent requirements have been specified, in environmentally sensitive areas or where the risk of oil contamination to further processes would have significant effects.

OIL INTERCEPTORS

OPTIONS & ACCESSORIES The design of new in-ground units enables various features to be incorporated that may benefit operation of the system. These include: - Trash rack and screenings trough, storm water bypass channel, Vortex Pipes for storm water flow, clarified water pumping well, handrail, sump access ladders, open grid or chequer plate flooring panels over the sump, walkway platforms over the sump for access, sludge discharge pipes, A range of complementary equipment is also available to facilitate installation and operation including: feed pumps, recovered oil pumps, clarified water pumps, level switches, oil in water monitor, pack removing frame and control equipment for motors and other ancillary items.

SINGLE OR TWO STAGE CONCRETE (RCC) SUMPS

PERFORMANCE The system is designed to capture 100% of 50 micron oil droplets at s.g. 0.86 from water of s.g. 1.0. Typically, effluents are achieved in the range of 10 - 60ppm but the addition of a separate coalescing media stage can improve performance to 5ppm or less.

RANGE The In-Ground kits are generally used for very high flow-rates or where concrete sumps already exist or where our Stetpack range cannot be used. Kits can be supplied for flow-rates from 2m³/h to 2,500m³/h. The equipment utilises a patented corrugated plate arrangement for the first stage. This basic building block can be adapted to a wide variety of configurations and process designs. See our Stetpack data sheets for details of fabricated steel units that can be installed above or below ground

In-ground RCC system with Polypropylene plates housed in stainless steel casings

A T O N E W I T H S E P A R A T I O N T E C H N O L O G Y

DESIGNS Stetfield Separators can supply outline design drawings for the concrete sump for these in-ground units sufficient for a civil engineer to do the detailed design work and arrange the construction details for the sump. Please contact us to discuss individual applications. It is important to determine invert levels for new sumps.

Stainless steel plate pack with corrugated plates

KROFTA

We have considerable experience in the refurbishment of old concrete sumps. We can undertake full sump refurbishment and can normally supply replacement parts even for in-ground units supplied by other companies.

REFURBISHING EXISTING SUMPS

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New plate packs installed

Our standard packages include a readily accessible inlet coarse screening device (trash rack) with a screenings trough for water run-back, adjustable or fixed inlet weir, adjustable rotary oil discharge weirs/skimmers, corrugated plate packs. Corrugated plates are available in Polypropylene, PVC, FRP or Stainless Steel. The component parts of the sump can be manufactured in Carbon Steel with either Epoxy painted or Galvanised finish. Full Stainless Steel manufactured parts are available to ensure a long, trouble-free working life. Where flooring is provided, special kerbing usually needs to be allowed for in the civil design and needs to be installed in conjunction with civil construction work. All handrails and ladders are in accordance with current Standards. Whilst most units are expected to be installed in-ground, concrete tanks can be either partly or fully above ground. In any in-ground system it is important that accurate information be provided on invert levels to ensure good hydraulic flow through the separator. The inlet and outlet connections can be adapted as required.

FEATURES

For Europe, Middle East & North Africa Stetfield Separators Limited

Parkengue, Kernick Industrial Estate,

Penryn, Cornwall, TR10 9EP United Kingdom

Tel: +44 (0)13 2656 2635 Fax: +44 (0)13 2656 3316

Web Site: www.stetfield.com email: [email protected]

For India, Far East and Middle East Krofta Engineering Limited

204 Ideal House, 69 Nehru Place,

New Delhi — 110019 India

Tel: +91-11-4724 2500 Fax: +91-11-2644 3695

Web Site: www.kroftaengineering.com email: [email protected]

Stainless steel/PVC packs

Pack support frame and plate pack

Plate pack being lowered into position

Inlet Trash Screen

KROFTA

STETPACK

APPLICATIONS Oily wastes and rainwater run-off streams at power stations, rail yards, maintenance depots, transport depots, industrial sites, waste treatment facilities, oil storage sites and onshore bilge and ballast treatment. In fact, any place where free oil contamination is a problem. The units are often used as pre-treatment to further processes such as dissolved or induced air flotation, electrocoagulation and/or biological treatment and should be selected where especially stringent effluent requirements have been specified, in environmentally sensitive areas or where the risk of oil contamination to further processes would have significant effects.

OIL INTERCEPTORS

OPTIONS & ACCESSORIES The following optional features are available for all separators: clarified water pumping well, extension of free board for below ground installation, handrail, access ladder and flooring, sludge discharge pipes, stiffened base for mounting on bearers in place of standard flat fully supported base and stainless steel or non-metallic materials of construction. A range of complementary equipment is also available to facilitate installation and operation including: feed pumps, recovered oil pumps, clarified water pumps, oil in water monitor, pack removing frame and control equipment for motors and other ancillary items.

SINGLE STAGE RECTANGULAR UNIT (SS)

PERFORMANCE The system is designed to capture 100% of 50 micron oil droplets at SG 0.86 from water of SG 1.0. Typically, effluents are achieved in the range of 10 - 60mg/l.

RANGE Stetpack is a range of oil water separation equipment in three standard types: Circular Single-Stage Units Rectangular Single-Stage Units Rectangular Two-Stage Units The equipment utilises a patented corrugated plate arrangement for the first stage. This basic building block can be adapted to a wide variety of mechanical configurations and process designs.

Typical Stetpack SS180 separators with inlet end seen on LH unit and outlet end on RH

APPROX. DIMENSIONS (mm)


SPECIAL DESIGNS Stetfield Separators specialise in the design and manufacture of purpose-built units to suit individual applications as well as providing our full range of standard units. Please contact us to discuss individual applications..

Model No. SS15 SS30 SS60 SS90 SS120 SS180 SS270 SS360 SS540 SS720

Flow (m³/h) 4 8 16 24 32 48 72 96 144 192

A (mm) 2300 2650 2650 3050 4050 4350 4350 4350 4350 4350

B (mm) 1750 2150 2150 2500 3050 3200 3200 3200 3200 3200

C (mm) 570 570 1136 1136 1136 1136 1700 2270 3390 4500

Static wt (kg) 620 870 1190 1920 2800 3350 4950 6490 9000 13000

Full wt (kg) 1985 3045 5540 7810 13000 14950 22340 28950 45000 58000

SS1080

288

4350

3200

6760

19300

82500

SS900

240

4350

3200

5640

16000

70000

KROFTA

The enhanced sedimentation characteristics utilised in our Stetpack range of oil separators can also be used to improve gravity settling of suspended solids. If necessary, the plates can be arranged in Lamella fashion to provide larger passages for the waste and avoid blockage where large volumes or a lack of mobility of the settled solids occurs. Units can be provided with multiple stages for the separation of solids in the primary section, followed by further plate or coalescing stages for free and dispersed oils. If necessary, drag conveyors can be provided beneath the initial stages to remove suspended solids as they are precipitated. Alternatively, sludge draw-off points can be provided for removal by tanker. Provision can be made and plant provided for the addition of chemicals to assist in both solid and oil separation.

SOLIDS SETTLING APPLICATIONS

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Fabricated in substantial stainless steel, or mild steel sheet with two-pack epoxy paint finish for corrosion prevention. GRP units available to special order. Certificates of Conformity and Hydraulic tests can be provided, if required. Stetpacks include a readily accessible inlet coarse screening device, an integral separated oil receiving tank, adjustable oil discharge weirs and a corrugated plate pack, located in a stainless steel case with a lifting bar for ease of removal. Corrugated plates are available in PVC, Polypropylene, GRP or Stainless Steel Where flooring is provided, access points are available as required and the floor may be fully bolted, sealed and vented for explosion-proof installations. Where loose covers are specified, these are interlocked to prevent rainwater ingress. All handrails and ladders are in accordance with British Standards. Whilst most units are expected to be installed above ground, the design is suitable for in-ground location. It is suggested that the units be positioned on a dry lean mix base and backfilled with dry lean concrete. To prevent distortion, they should be filled with water

FEATURES

The standard Stetpack range provides capacities up to a nominal 288m³/h. For capacities above this level, the modules can be combined to operate in parallel to achieve capacities greater than 1,000m³/h. These larger units can be provided as stand alone steel weldments for installation either above ground or for dropping into a prepared foundation and backfilled, as indicated for the smaller units. Alternatively, sets of internals can be provided for building into concrete (RCC) interceptors. We can supply a full kit of parts for in-ground concrete sumps, i.e. plate packs, weirs, support frames, media baskets, etc. These units can be supplied for flow rates of 1m³/h to >1000m³/h

LARGE CAPACITY PLANTS


Final water weir and oil weirs

A stainless steel plate pack for corrosive applications




Tel: +44 (0)13 2656 2635 Fax: +44 (0)13 2656 3316



204 Ideal House,, 69 Nehru Place,

New Delhi—110019 India

Tel: +91-11-4724 2500 Fax: +91-11-2644 3695


KROFTA

STETPACK

APPLICATIONS Oily wastes and rainwater run-off streams at power stations, rail yards, maintenance depots, transport depots, industrial sites, waste treatment facilities, oil storage sites and ships’ bilge and ballast onshore treatment. In fact, any place where free oil contamination is a problem. The units are often used as pre-treatment to further processes such as dissolved or induced air flotation, electrocoagulation and/or biological treatment. They should be selected where especially stringent effluent requirements have been specified, in environmentally sensitive areas or where the risk of oil contamination to further processes would have significant effects.

OPTIONS & ACCESSORIES Stetpack two-stage units can be supplied with all the same options as for the single-stage units, but with the addition of an Automatic Air Backflushing feature for the second stage coalescer. The latter item comprises an air manifold located beneath the media bed with associated controls. It is arranged to admit compressed air, either on an automatic timed basis or for manual initiation via a control valve. This feature allows denser media to be employed with better separation and lessens the risk of blockage by any entrained solids.

TWO STAGE RECTANGULAR UNIT (TS)


PERFORMANCE The system is designed to capture 100% of 50 micron oil droplets, under the same conditions as the single stage unit, plus a high proportion of smaller dispersed droplets, depending upon the density of coalescing media employed. The second stage, which is mounted in stainless steel baskets, can be specified to suit the required performance, possibly at some cost in terms of maintenance. Typically, effluents are achieved in the range 10 - 30mg/l with 5 - 2mg/l being possible. In some cases, where a further treatment such as Dissolved Air Flotation (DAF) or Electrocoagulation are being considered, the two-stage unit may achieve an adequate performance in a single stage, rendering further treatment unnecessary.

Model No. TS15 TS30 TS60 TS90 TS120 TS180 TS270 TS360 TS540 TS720

Flow (m³/h) 4 8 16 24 32 48 72 96 144 192

A (mm) 2700 3100 3100 3700 4850 5250 5250 5250 5250 5250

B (mm) 1750 2150 2150 2500 3050 3200 3200 3200 3200 3200

C (mm) 570 570 1136 1136 1136 1136 1700 2270 3390 4500

Static wt (kg) 1150 1650 2500 2750 3600 4750 6400 8900 11600 15400

Laden wt (kg) 2800 4250 8000 11000 14800 17550 27500 37000 53000 62000

TS6

2

1890

1450

570

850

2180

RANGE Stetpack is a range of oil water separation equipment in three standard types: Circular Single-Stage Units Rectangular Single-Stage Units Rectangular Two-Stage Units The equipment utilises a corrugated plate arrangement for the first stage and a porous media coalescing second stage. These basic building blocks can be adapted to a wide variety of mechanical configurations and process designs.

Mobile Stetpack TS6 separator with self-cleaning inlet strainer and oil-water monitor

DIMENSIONS (mm) ‘A

‘C

‘B

OIL INTERCEPTORS

KROFTA

The enhanced sedimentation characteristics utilised in our Stetpack range of oil separators can also be used to improve gravity settling of suspended solids. If necessary, the plates can be arranged in Lamella fashion to provide larger passages for the waste and avoid blockage where large volumes or a lack of mobility of the settled solids occurs. Units can be provided with multiple stages for the separation of solids in the primary section, followed by further plate or coalescing stages for free and dispersed oils. If necessary, drag conveyors can be provided beneath the initial stages to remove suspended solids as they are precipitated. Alternatively, sludge draw-off points can be provided for removal by tanker. Provision can be made and plant provided for the addition of chemicals to assist in both solid and oil separation.

SOLIDS SETTLING APPLICATIONS




Tel: +44 (0)13 2656 2635 Fax: +44 (0)13 2656 3316


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Fabricated in substantial mild steel sheet with an epoxy finish for corrosion prevention. Certificates of Conformity and Hydraulic testing are provided as standard. Stetpacks include an inlet filter device, an integral separated oil receiving tank, adjustable oil discharge weirs, a corrugated plate pack, located in a stainless steel case, with a lifting bar for ease of removal. In the case of two-stage units, a porous media coalescing stage is also located in stainless steel baskets for ease of removal. Where flooring is provided, access points are available as required and the floor may be fully bolted, sealed and vented for explosion-proof installations. Where loose covers are specified, these are interlocked to prevent rainwater ingress. All handrails and ladders are in accordance with British Standards. Whilst most units are expected to be installed above ground, the design is suitable for in-ground location. It is suggested that the units be positioned on a dry lean mix base and backfilled with dry lean concrete. To prevent distortion, they should be filled with water before backfilling. The inlet and outlet connections can be specified to suit.

FEATURES


The standard Stetpack range provides capacities up to a nominal 192m³/h. For capacities above this level, the modules can be combined to operate in parallel to achieve capacities greater than 1,000m³/h.

All units can be provided as stand alone steel weldments for installation above ground, or for dropping into a prepared foundation and backfilled, as indicated for the smaller units. Alternatively, sets of internals can be provided for building into concrete (RCC) interceptors.

We can undertake basic sump design and supply a full kit of parts for in-ground concrete sumps, i.e. plate packs, weirs, support frames, media baskets, etc. These units can be supplied from a flow-rate of 1m³/h to >1000m³/h.

LARGE CAPACITY PLANTS

Two Stage Stetpack with Drag Conveyor for Solids Removal

Plate Pack section


204 Ideal House,, 69 Nehru Place,

New Delhi—110019 India

Tel: +91-11-4724 2500 Fax: +91-11-2644 3695


KROFTA

in-ground cpi issue 04 - krofta engineering stetfield in-ground.pdfwater bypass channel, ... (trash...

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