Maximize your operational efficiency, sustainability, and safety with Metso's sulfuric acid plant solutions. Our technology is based on more than 90 years of experience in a diverse range of projects – we have delivered over 650 complete plants globally, with daily capacities ranging from 100 to 5,000 tons. We also offer a comprehensive range of service solutions to assist you throughout your plant’s lifecycle.
Benefits
- Focuses on safety and reliability
- Includes proprietary design of primary sulfuric acid equipment
- Uses energy-efficient, low-emission technologies
- Minimizes water consumption
- Offers solutions for a full range of production needs, from modular options to low capacity, right up to mega-capacity plants
Operation
In a pyrometallurgical process, gas from the gas-cleaning section enters the sulfuric acid plant via a drying tower, where most of the humidity is removed to minimize the potential for corrosion inside the plant. Before entering the stainless steel converter, the gas temperature must be increased to accommodate the operating temperature of the catalyst. Sulfur dioxide is converted into sulfur trioxide, and the process gas is sent to the first absorption step where the sulfur trioxide is removed and sulfuric acid is formed. After further conversion, the gas is routed to the stack via the final absorber.
Offerings
Modular solution for efficient NOx mitigation in sulphuric acid plants
The NOx Removal Unit is a fully modularized and prefabricated system designed to eliminate nitrogen oxides (NOx) from sulphuric acid contaminated with nitrogen oxides (typically from the candle filters) in sulphuric acid production. Engineered for seamless integration near the drying tower, this compact package unit reprocesses nitrosyl sulphuric acid - formed in absorption towers - into valuable sulphuric acid and nitrogen gas compunds.
Leveraging a controlled reaction with SO₂-saturated acid, the unit transforms NOx-laden condensates into recyclable H₂SO₄ and N₂, significantly reducing environmental impact and enhancing plant efficiency.
Key benefits
- Modular & prefabricated design: fast installation, minimal site work, and easy relocation or expansion
- Effective NOx neutralization: converts harmful nitrous compounds into usable sulphuric acid and nitrogen without the need for chemical addition
- Acid recovery & recycling: reintegrates purified acid back into the production cycle
- Emission reduction: NOx and nitrous compound emissions reduced
- Compact integration: designed for optimal placement within existing sulphuric acid plant infrastructure
With its advanced reaction control, acid recovery system, and plug-and-play modularity, the NOx Removal Unit supports sustainable operations while ensuring high performance and compliance with environmental standards.
Services
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