23600 Nm3/h Natural Gas Demercurization Adsorption Tower – Completed & Shipped to Ghana

ZHM is proud to announce the successful completion, factory acceptance, and shipment of a high‑pressure natural gas demercurization pressure vessel tower for a Ghana on‑gas project. The equipment is designed to treat 23600 Nm³/h (200 mmscfd) of natural gas, ensuring mercury removal down to ultra‑low emission levels.

Parameter Value
Rated gas flow 23600 Nm³/h (200 mmscfd)
Design pressure 7.6 MPa (1100 psig)
Operating pressure 6.1 MPa (G)
Inlet mercury content ≤ 0.07 μg/m³
Outlet mercury content ≤ 0.01 μg/m³
Inlet gas temperature ≤ 49°C
Ambient temperature -10°C ~ +40°C
Operation mode Continuous duty
Inlet/outlet nozzle size DN400 (HG/T 20615 flanges, Class 600)
Installation Outdoor
Vessel material Carbon steel (full material traceability)
Total weight Approx. 70 tons

Advanced Design for Harsh Service

The adsorption tower is engineered for continuous, unattended field operation in tropical environments. The carbon steel pressure vessel is fabricated according to strict standards, with full penetration welds and reinforced supports. All flange connections comply with HG/T 20615 (latest edition) – the international equivalent to ASME B16.5, ensuring compatibility with global pipeline systems.

To facilitate future automation and remote monitoring, the tower is equipped with DN15/DN20 threaded ports (plugged) for pressure transmitters and temperature transmitters – a customer‑requested provision for distributed control system (DCS) integration. A dedicated safety valve connection is also included, with detailed sizing data (orifice diameter, set pressure, back pressure) provided in the technical datasheet, allowing safe venting into a common flare or relief header.

Uncompromised Quality Control – 100% NDT

Every critical weld and load‑bearing component has undergone stringent non‑destructive testing:

Ultrasonic Testing (UT) – per GB/T 11345-2013, performed by Level‑2 certified technicians (GB/T 9445 or EN 473). Applies to all main shell seams, flange‑to‑shell welds, and forging interfaces.

Radiographic Testing (RT) – per NB/T 47013.2, with Level‑2 national certification. Covers 100% of the circumferential and longitudinal welds on the pressure‑retaining envelope.

Complete UT/RT reports, including inspection records, evaluator qualifications, and acceptance conclusions, are provided with the shipment.

Logistics & Site Preparation Support

The tower, with a gross weight of approximately 70 tons, has been successfully loaded and transported from our ZHM facility to the port of Shanghai (or Lianyungang) using specialized heavy‑lift trailers and flat bed frame type container. We have supplied the customer with:

Base plate & anchor bolt layout drawings
Equipment net weight, operating weight, and total weight
Nozzle orientation & centricity data
Manifest and Spool Pipe support brackets (pre‑welded to the vessel at 30° intervals, allowing easy field installation of additional pipe supports)

Corrosion Protection & Painting

The external surface is protected with a multi‑layer coating system: primer + intermediate + topcoat, with specified dry film thickness (DFT) data provided per job requirements. The system is suitable for outdoor tropical service and salt‑laden environments.

Structural & Process Design

The tower integrates optimized gas distribution, high‑efficiency mercury adsorption media, and robust pressure vessel structure. Key components include main pressure shell, upper/lower packing supports, charging/discharging ports, manholes, pressure gauge connections, safety valve port, sampling tank (50 L, 10 MPa), and reserved ports for pressure transmitters and temperature transmitters (DN15/DN20 with plugs) for remote monitoring and automatic control system expansion.
Piping, elbows, and brackets are pre‑assembled in the workshop to simplify on‑site installation. All flanges, valves, and fittings comply with latest HG/T 20615 standards to ensure interchangeability and safety. A 50 L sampling tank with inlet, exhaust, relief valves and pressure gauge is equipped for real‑time gas component analysis.

Quality Control & Non‑Destructive Testing

Strict quality control is implemented throughout fabrication. Critical welds, pressure shell, and flange joints undergo 100% non‑destructive testing (NDT), including:
Ultrasonic Testing (UT): per GB/T 11345‑2013
Radiographic Testing (RT): per NB/T 47013.2

All inspectors hold Level 2 qualifications per GB/T 9445 and EN 473. Complete NDT reports are provided with delivery.

Application & Performance

This mercury removal tower is designed for Ghana’s natural gas gathering and processing system, efficiently removing elemental mercury and mercury compounds to meet stringent emission standards. It supports long‑term continuous operation with low maintenance cost, high adsorption efficiency, and stable pressure drop performance.

Delivery & Project Status

The unit has been fully fabricated, inspected, and shipped. Total weight is approximately 70 tons, with professional heavy‑haul transportation from Zhejiang to Shanghai Baoshan / Lianyungang port. Technical documents including general arrangement, anchor bolt layout, net weight, and operating weight are provided for on‑site piping and foundation construction.
This Ghana project mercury removal adsorption tower represents our mature capability in natural gas purification equipment, pressure vessel design, and customized gas processing solutions, supporting global customers with safe, efficient, and compliant natural gas treatment.

Why Choose ZHM Demercurization Solutions?

Proven design for high‑pressure natural gas (up to 7.6 MPa)
Mercury outlet guaranteed ≤ 0.01 μg/m³ – meeting global environmental standards
Full traceability of materials, welds, and NDT records
Flexible flanging – either loose flanges for field assembly or pre‑assembled elbows (shop‑welded) as requested; all dimensions verified before shipment
Rapid response for engineering, manufacturing, and logistics


Project Status – Shipped and Installed Successfully

The unit has passed factory acceptance testing (FAT) by the customer’s representative. All documentation, including technical drawings, NDT reports, material certificates, and as‑built GA drawings, is enclosed with the shipment. The pressure vessel tower is now en route to the Ghana LNG / natural gas treatment site and installed successfully by our site installation and supervision team; 

For inquiries or to request a similar solution for your natural gas mercury removal project, please contact ZHM:

We specialize in turnkey adsorption towers, pressure vessels, and skid‑mounted mercury removal systems for natural gas, associated gas, and refinery off‑gas.

Keywords:
natural gas mercury removal adsorption tower, Ghana gas purification, 23600 Nm³/h, 200 mmscfd, Q345R carbon steel, 7.6 MPa design pressure, mercury emission ≤0.01 μg/m³, HG/T 20615 flange, continuous operation, pressure vessel, UT/RT non-destructive testing, natural gas demercuration

Description:
This professional technical article introduces a 23600 Nm³/h (200 mmscfd) natural gas mercury removal adsorption tower customized for Ghana’s gas project. Built with Q345R carbon steel, it operates stably at 6.1 MPa working pressure, reduces mercury content to ≤0.01 μg/m³, and complies with HG/T 20615 standards. It has passed 100% UT/RT NDT and is ready for long-term outdoor continuous service.

1 Natural Gas Demercury Removal Tower Vessel

2 3D BIM Mercury Removal Tower

3 PID Process Instrument Diagram Drawing Piping Vessel Flow chart

4 Skid mounted 200 mmscfd 23600 m3ph adsorption vessel Production drawings

5 Heavy plate Rolling Bending Pressure Vessel wall shell

6 Pressure Vessel Flange Nozzle HGT 20615 ASME Class 600

7 pressure vessel carbon steel shell Q345E welding inspection

8 Prefabricated carbon steel charging ports full penetration welding reinforced support

9 nozzle orientation centricity head mounting gauge connection Q345R

10 vessel internal bracket partition filter upper lower packing supports

11 Internal parts packer filler supports

12 equipment hole plate stainless steel 304 with support frame

13 fillet welding ndt non destructive testing

14 safety valve port manhole welding seam preheating treatment

15 Heating Treatment Pressure Vessel

16 Connecting Pipe spools manifest Production Inspection

17 Hydraulic Testing water pressure inspection

18 Elbow spool manifesto painting

19 primer intermediate polyutherine Painting dry film thickness testing

20 Connecting Piping elbow brackets Spool preassembly Painting

21 Demercurized Absorption Tank Painting Packing

22 Hg Removal Tower Pressure vessel painting packing

23 Demercury tower reserved ports pressure reliefing safety valves

24 Demercury tower treated natural gas sampling tank cabinet

25 Demercury activated carbon sulfur loaded mercury removal agent reaction

26 mercury removal tower packing delivery

27 demercury tower frame type container loading

28 M2 module demercury system installation

29 mercury removal absorption tower piping instrument installation

30 large scale demercuration system installation onshore gas processing facilities

31 commissioning optimizing distribution absorption pressure vessel

32 charging discharging ports manholes safety valves transmitter installation

Why ZHM Huawu Metal Natural Gas Demercurization Adsorption Tower System and Accessories ?

Reliable and Customized Designs	Cutting Edge Designing Process	Free Online Price System	Easy Bolt-by-number Assembly
Over Two Decades of Experience	Value For Money	Unmatched in Quality and Craftmanship	Excellent Customer Service

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HOW CAN WE HELP YOU?

ZHM’s world-class team — together with our raw material suppliers and subcontractors — works to solve your most challenging design, engineering, farbrication or construction issues.

Contact ZHM by telephone at +86 135-8815-1981 (wechat and whatsapp) or send us your questions via email to info@zhmsteelworks.com