In the fertilizer industry, every overseas project brings unique challenges—climate, raw materials, process requirements, and schedule pressure. This case study documents how WEIWO fertilizer production line manufacturer helped a client in Vietnam transform an initial 150,000-ton per year fertilizer production line into a 200,000-ton annual capacity benchmark project.

The client is located in Vietnam, a region known for its consistently warm and humid climate, with average annual humidity often exceeding 80%. This environment places extraordinary demands on any NPK compound fertilizer production line, especially granulation and drying. The client initially approached WEIWO with a requirement to build a fertilizer production line with an annual output of 150,000 tons.

However, during preliminary technical discussions, the WEIWO engineering team quickly recognized a critical issue: if a standard rotary drum granulation line were applied directly, the client would face severe material clumping, reduced fertilizer granulation efficiency, and frequent shutdowns for cleaning.

In hot and humid regions like Vietnam, fertilizer raw materials continuously absorb moisture from the air during storage, conveying, and granulation. When moisture content exceeds the suitable range for granulation, several problems arise:

• Materials stick to the granulator walls and form lumps, lowering the pellet formation rate.
• The drying load increases, energy consumption rises, and moisture content becomes difficult to control at the target 2–3%.
• Discharge boxes and conveying equipment clog easily, causing unplanned downtime.
• Final granules lack sufficient strength and tend to break or cake during storage.

These issues are the exact challenges that a high humidity fertilizer granulation solution must address systematically.

For this specific project, the WEIWO engineering team proposed a comprehensive customized fertilizer production line solution:

Optimizing the overall process flow – Recalculating material residence time in granulation, drying, and cooling stages, and adjusting heat distribution.

Reselecting key equipment – Choosing granulators and dryers better suited to moisture-absorbing materials.

Extending the length of specific drum units – By increasing the effective length of the drying and cooling drums, material residence time was extended.

Redesigning the discharge box structure – To address material bridging and clogging, the internal structure and discharge angle were redesigned. This anti-clogging fertilizer equipment design became the key to stable line operation.

After these modifications, the production line not only stably reached the client’s original target of 150,000 tons per year but was further boosted to 200,000 tons per year, significantly surpassing expectations.

Equipment manufacturing is only the first step. The success of an overseas project depends even more on on-site execution. Throughout the project, WEIWO engineers remained on-site in Vietnam, providing hands-on support covering fertilizer plant commissioning and fertilizer equipment installation service.

Civil works stage: Assisted the client in confirming equipment foundation dimensions and embedded part locations.

Layout stage: Optimized equipment arrangement and material flow based on actual plant conditions.

Installation stage: Guided lifting, alignment, piping connections, and electrical wiring.

Commissioning stage: Conducted no-load and load trial runs for each machine.

In addition, WEIWO provided a complimentary one-year quality assurance period and established a comprehensive fertilizer equipment spare parts supply system to ensure reliable long-term operation.

After commissioning, the production line has operated stably, with granule strength, moisture control, and capacity all meeting target expectations. The client noted that WEIWO not only solved the technical challenges posed by the humid tropical climate but also increased capacity by 33%. Today, this 200,000 ton fertilizer production line stands as a benchmark project for local fertilizer production.

The Vietnam 200,000-ton annual capacity fertilizer production line is a typical example of how WEIWO uses a turnkey fertilizer plant solution to overcome complex operating conditions. From the initial 150,000-ton requirement to the final stable output of 200,000 tons, every step reflects WEIWO’s deep understanding of the fertilizer equipment supplier Southeast Asia market.

If you are also planning a fertilizer production line and face special requirements related to raw materials, climate, or capacity, contact the WEIWO engineering team for a customized fertilizer plant quotation and fertilizer production line cost estimation.