The Tech Inc. Walnut Shell Filter polishes produced water after primary separation, removing residual oil and suspended solids so the water can be injected back into the reservoir or sent to disposal wells. Each vessel holds a deep bed of crushed walnut shell that traps oil droplets and fine solids, and the bed is scrubbed and backwashed in place, so the media is reused rather than replaced. Tech Inc. supplies complete multi-vessel trains for onshore and offshore production facilities, engineered to the site's water and footprint.

Main components

Filter vessels with crushed walnut-shell (nutshell) media, inlet distributor and outlet screens
Media scrubbing and backwash system, with backwash returned to the upstream separation stage
Inlet, outlet and backwash headers with automated valves
Differential-pressure, flow and level instruments, with sample points for oil-in-water checks
PLC control panel for filtration and backwash sequencing, with signals to the plant DCS or SCADA
Structural skid with platforms, ladders and lifting points

Applications: produced-water deoiling, water injection for reservoir pressure support, disposal-well protection, gathering centres and central processing facilities, and offshore platforms.

Send your process data and specification to mail@techincresearch.com or call +1 (289) 622-1032 for a P&ID, GA drawing and quotation.

Walnut Shell Filter

TI-NSF100 – walnut-shell filter train for 100,000 barrels of produced water a day.

Multi-train installations – several trains in parallel for larger water-handling facilities.

Duty and backwash arrangement – vessel count chosen to keep the train on line while one vessel backwashes.
Capacity: typically 100,000 barrels a day per TI-NSF100 train (about 662 m³/h), or to client specification

Filter media: crushed walnut shell, cleaned by scrubbing and backwash

Inlet oil and solids loading: sized to the duty, or to client specification

Outlet quality: to the project's injection or disposal specification

Design pressure and temperature: to client specification

Vessels: designed to ASME VIII or client specification

Materials: carbon steel with internal lining or coating, or to client specification

Backwash initiation: on differential pressure, timer or operator command
What capacity does one train treat?
Typically 100,000 barrels of produced water a day (about 662 m³/h) per TI-NSF100 train, with trains in parallel for larger facilities.

Does the media need replacing?
No routine replacement: the crushed walnut shell is cleaned in place by scrubbing and backwash and reused.

How does it stay on line during backwash?
The vessel count is chosen so the train keeps filtering while one vessel backwashes, started on differential pressure or a timer.

What outlet quality does it achieve?
Outlet quality is engineered to the project's injection or disposal specification.
The walnut shell filter is the final deoiling step in most produced-water trains, downstream of hydrocyclones or gas flotation. Water-injection and waterflood projects use it to reach the low oil and solids content that protects injection wells and the reservoir, and the same filter runs ahead of disposal wells. Trains suit onshore gathering centres, central processing facilities and offshore platforms.
Reusable media – the walnut-shell bed is scrubbed and backwashed in place, with only periodic top-up.

Captures fine oil – the deep bed traps droplets and solids that pass primary separation.

Continuous duty – one vessel backwashes while the rest of the train stays on line.

Backwash recovered – backwash water and oil return to the upstream separation stage.

Automatic operation – PLC sequencing limits operator work to routine checks.

Factory tested – trains are piped, wired and tested on the skid before shipment.
Established manufacturer – part of the Davey Group since 1990, exporting to more than 110 countries.

Everything under one roof – in-house mechanical fabrication, electrical works, PLC and SCADA automation, and R&D.

Complete scope – design, supply, installation, commissioning, factory acceptance testing (FAT) and site acceptance testing (SAT).

Trusted by Saudi Aramco – an established supplier to Saudi Aramco.

Certified management systems – ISO 9001, ISO 14001 and ISO 45001, with CE marking.

Close to your project – offices in Chennai (India), Toronto (Canada), Tallinn (Estonia) and Al Khobar (Saudi Arabia).

For this product – vessels, internals, piping and the backwash control system fabricated, assembled and tested under one roof.
Engineering to your P&ID, data sheets and company standards; drawings submitted for approval before manufacture; factory acceptance testing (FAT) with client or third-party inspection; export packing and full documentation dossier; installation, commissioning and site acceptance testing (SAT); operator training, spares and after-sales support worldwide. Contact mail@techincresearch.com or +1 (289) 622-1032.
Produced Water Treatment: How to Choose the Right Train from Separator to Injection Well
Deoiling Hydrocyclone Skid – the primary deoiling step ahead of the nutshell filter.

Induced Gas Flotation (IGF) Unit – secondary deoiling that reduces the oil load on the filter bed.

Produced Water Cartridge Polishing Skid – fine-solids polishing after the nutshell filter, before injection.

Test Separator Package – upstream separation of oil, gas and water.

Produced Water Treatment Package – complete package that this unit forms part of.

mail@techincresearch.com

+1 (289) 622-1032

Walnut Shell Filter

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