In scenarios such as energy emergency backup, oil and gas exploitation, polar scientific research, and backup power supplies in alpine regions of northern China, diesel/gas generator sets and industrial boilers often operate under extremely cold conditions ranging from -40°C to -20°C. Traditional SCR denitrification systems are prone to issues including catalyst freezing and clogging, urea crystallization, pipeline icing, a sharp drop in denitrification efficiency, and difficulties in system startup and shutdown, which have become bottlenecks for environmental compliance and stable equipment operation.
With years of deep expertise in internal combustion engine exhaust gas treatment, Guangdong Green Valley Environmental Protection has focused on pain points in extremely cold scenarios and developed a highly integrated SCR denitrification system dedicated to frigid conditions. Featuring full-chain low-temperature adaptive technology, integrated design, and intelligent operation and maintenance solutions, the system fills an industry gap and provides a reliable solution for compliant nitrogen oxide (NOₓ) emissions in extremely cold environments.
Extremely cold working conditions pose severe challenges to SCR denitrification systems, with three major pain points in traditional systems:
- Conventional catalysts feature a high activation temperature threshold, resulting in denitrification efficiency below 50% at low temperatures and frequent clogging;
- Standard urea solutions are susceptible to freezing, causing blockages in pipelines and nozzles and high maintenance costs;
- The split-type design incurs significant heat loss and energy consumption, with complex installation that fails to meet the demand for rapid deployment in frigid regions.
To address these pain points, Green Valley Environmental Protection has achieved breakthroughs across five dimensions, establishing a full-chain cold-resistant technical system:
- Stabilize NOₓ conversion rate at ≥92% and extend service life by 3–5 years;
- Equip with integrated heat-tracing and thermal insulation pipelines to completely eliminate crystallization and freezing blockages;
- Establish a fully closed-loop thermal management system that combines flue gas waste heat recovery with electric auxiliary heating for rapid temperature rise, enabling freeze-free cold start;
- Adopt a highly integrated skid-mounted design for prefabrication in factories and on-site hoisting, realizing plug-and-play operation. The installation and commissioning period is shortened by 3–5 days, adapting to harsh outdoor environments;
- Integrated with an intelligent cloud platform, supporting remote monitoring, automatic parameter adjustment, and proactive fault early warning, achieving unattended operation in extremely cold conditions.
SCR Denitrification System, Low-Nitrogen Retrofit, NOₓ Treatment, Integrated Low-Temperature SCR Denitrification System, PM Treatment
At present, the system has been successfully applied in frigid regions including Inner Mongolia, Northeast China, Belarus, Canada, and the United States. It has also been deployed in many countries worldwide, such as southern North America, Europe, Australia, and the Middle East. Centered on scenario-based technological breakthroughs, Green Valley Environmental Protection continues to advance denitrification technologies for extreme working conditions, supports the environmentally friendly design of energy equipment in frigid regions, and safeguards blue skies under harsh environments.
Post time: Apr-07-2026