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Coal/Oilfield Gas Engine Exhaust SCR Treatment
Associated petroleum gas (APG) is a combustible gas generated as a by-product during crude oil extraction. Direct venting of APG leads to energy waste and air pollution. Recovering APG for power generation via internal combustion generator sets enables on-site energy utilization at oil and gas fields. The flue gas from APG-fired generator sets contains nitrogen oxides (NOₓ). Affected by fluctuations in APG composition and frequent load variations of the generator sets, NOₓ emissions vary significantly and fail to meet the current local and national emission standards for air pollutants.
This project adopts the Selective Catalytic Reduction (SCR) denitrification process for end-of-pipe NOₓ treatment of generator exhaust gas to reduce NOₓ emissions, achieve compliant exhaust discharge, and support the clean and resource-oriented utilization of oilfield associated gas.
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675kW Weichai Diesel Generator Set SCR Denitration – Czech
Green Valley designed an exhaust gas treatment solution for the 675kW Weichai diesel generator set, Model Weichai 6M33G825/5 in Czech Republic.
Green Valley SCR (Selective Catalytic Reduction) denitration technology is applied to achieve deep purification of nitrogen oxides from the high-temperature exhaust gas of the diesel engine.
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DPF+SCR system for Comprehensive Exhaust Gas Treatment of Diesel Generator Sets (North America Project)
Green Valley supplies a containerized integrated DPF+SCR exhaust gas treatment system for this North America project to purify exhaust gas from stationary diesel generator sets. The system adopts a serial process with front-mounted DPF and rear-mounted SCR. The DPF traps particulate matter and oxidizes CO and HC to protect the SCR catalyst; the SCR reduces NOₓ into nitrogen and water via urea injection to realize synergistic removal of multiple pollutants.
The complete equipment is prefabricated and integrated inside the container at the factory for easy on-site installation. Equipped with PLC automatic control, online monitoring and safety alarm systems, it features a high degree of automation and stable operation. It meets the strict stationary source exhaust emission standards in North America and is suitable for exhaust retrofitting of industrial standby diesel generator sets.
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SCR system for Exhaust Gas of 350kW Gas Generator Sets – Germany
This project serves a plant in Germany, supporting a 350kW gas generator set. The SCR (Selective Catalytic Reduction) denitration system supplied by Green Valley achieves deep removal of nitrogen oxides (NOₓ) from the high-temperature exhaust of the gas engine to meet stringent local German exhaust emission regulations.
The equipment is installed outdoors on the rooftop. The complete package integrates the denitration reactor, stainless steel pipelines, expansion joints and support & fixing systems. Designed to withstand outdoor climatic conditions including low temperatures and snowfall in German winters, the system features excellent weather resistance and guarantees stable operation of the generator set throughout the year.
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Comprehensive Exhaust Treatment System (DOC+SCR system) for High-power Diesel Generator Sets in North America
Green Valley DOC+SCR System provides an integrated exhaust treatment solution for high-power diesel generator sets and internal combustion engines. Integrating DOC (Diesel Oxidation Catalyst) and SCR system (Selective Catalytic Reduction) units, the system can simultaneously remove CO, HC, NOₓ and other pollutants in exhaust gas.
The DOC unit converts CO and HC into carbon dioxide and water through catalytic oxidation, and oxidizes particulate precursors in exhaust. With special catalysts and urea solution as reductant, the SCR unit reduces NOₓ into nitrogen and water to achieve high-efficiency denitrification.
The system features compact structure, low back pressure and excellent vibration resistance, complying with emission standards of North America, Europe and other regions. Adopting modular design, it can be customized according to engine power and exhaust parameters. Easy to maintain, it reliably meets emission requirements for off-road internal combustion engines under continuous operation.
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Comprehensive Exhaust Gas Treatment for Diesel Generator Sets (DOCF+SCR) – Europe, Australia
Green Valley integrated DOCF+SCR comprehensive exhaust gas treatment technology realizes synergistic purification of particulate matter (PM), carbon monoxide (CO), hydrocarbons (HC) and nitrogen oxides (NOₓ) emitted during generator operation. It meets strict stationary source emission limits for domestic and overseas projects, and is suitable for exhaust gas compliance retrofits of industrial standby power and continuous power supply generator sets. According to site layout, the whole system can adopt split-type or containerized integrated solutions. Flue gas from the two generators converges and enters the after-treatment system, ensuring stable emission compliance whether the two units run independently or simultaneously.
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Power Plant
Selective catalytic reduction (SCR) is used to control NOx in diesel engine exhaust. NH3 or urea (usually urea aqueous solution with mass ratio of 32.5%) is used as reducing substance. Under the condition that O2 concentration is more than two orders of magnitude higher than NOx concentration, under the action of certain temperature and catalyst, NH3 is used to reduce NOx to N2 and H2O. Because NH3 selectively reduces NOx without reacting with O2 first, Therefore, it is called “selective catalytic reduction”.
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Comprehensive Exhaust Gas Treatment (DOCF+SCR Denitration) for Diesel Generator Sets in Belarus
During the operation of diesel generator sets, the exhaust gas contains various pollutants including particulate matter (PM), carbon monoxide (CO), hydrocarbons (HC), and nitrogen oxides (NOₓ).
The integrated DOCF+SCR exhaust gas treatment process enables the synergistic purification of multiple pollutants. The front-mounted DOCF unit treats particulate matter, CO and HC, followed by the rear SCR denitration equipment. With a high degree of system integration, the whole set is suitable for exhaust gas compliance treatment of stationary diesel generator sets, and is widely applied in scenarios such as industrial standby power supplies and continuous generator sets.
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Containerized Exhaust Gas Comprehensive Treatment for Generator Sets (DOCF+SCR) – UK
Green Valley containerized DOCF+SCR exhaust gas treatment system combines DOCF pre-treatment and SCR denitration to remove PM, CO, HC and NOₓ simultaneously. Prefabricated in factory for quick on-site installation. It adopts PLC automatic control with multi safety protections. Heat tracing on urea pipes prevents crystallization in cold weather. The system meets European emission standards for stationary diesel generator retrofits.
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SCR system for Exhaust Gas of Backup Generator Sets, Shanghai Huawei Intelligent Computing Center
Green Valley SCR Denitration Project for Backup Generator Sets of Shanghai Huawei Intelligent Computing Center. Equipped with 24 sets of Weichai 12M55D2450E310 diesel generator sets (65.65L displacement), model GRVNEC100-TX-24. The SCR system reduces NOₓ from 2550mg/m³N down to 150mg/m³, meeting local emission requirements for the intelligent computing center under emergency operation conditions.
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Comprehensive Exhaust‑gas Treatment (DPF+SCR) for Diesel Generator Sets in the Semiconductor Industry
Comprehensive Exhaust‑gas Treatment Solution (DPF+SCR) for Diesel Generator Sets in the Semiconductor Industry.
Custom‑tailored by Green Valley for the working conditions of standby generator sets in semiconductor plants.
The DPF efficiently captures particulate matter, while the SCR deeply reduces nitrogen oxides. The combined system achieves dual compliance for particulate matter and NOₓ. Featuring a compact structure, the equipment is suitable for retrofitting inside generator rooms. It meets stringent environmental standards of semiconductor factories and ensures stable and safe operation of data centers and chip manufacturing plants.
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SCR Denitration of Annealing Furnace Flue Gas
Green Valley Annealing Furnace SCR Denitration System is custom‑developed for annealing furnace flue‑gas working conditions. It adapts to the flue‑gas temperature characteristics of the annealing process and achieves efficient removal of nitrogen oxides in flue gas.
The system features stable operation and high denitration efficiency, consistently complying with local environmental emission requirements. With compact structure, it is compatible with retrofitting of existing workshop pipelines. Widely applied in metallurgical annealing furnace production lines, it helps industrial enterprises achieve low‑nitrogen emission compliance.