China Comprehensive Exhaust Gas Treatment for Diesel Generator Sets (DOCF+SCR) – Europe, Australia Manufacturer and Supplier

Comprehensive Exhaust Gas Treatment for Diesel Generator Sets (DOCF+SCR) – Europe, Australia

Short Description:

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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Technical introduction

The system uses serial process: DOCF pre-treatment + SCR denitration.

1、DOCF Unit (Diesel Oxidation Catalyst + Particulate Filter) Exhaust gas first passes through DOCF. The DOC noble metal catalyst oxidizes CO and HC into CO₂ and H₂O. Meanwhile, DOC produces NO₂ to support passive regeneration of the particulate filter, capturing PM efficiently. It prevents soot entering downstream SCR reactor and protects SCR catalyst from clogging.

2、SCR Denitration Unit Clean flue gas flows into SCR reactor. Urea solution is precisely injected and atomized to mix fully with exhaust gas. Within the suitable temperature window of catalyst, NH₃ decomposed from urea selectively reacts with NOₓ, reducing NOₓ into harmless nitrogen and water. Ammonia slip is strictly controlled to avoid secondary pollution.

3、 System Composition

The whole system consists of DOCF reactor, SCR reactor, urea storage & metering injection system, mixing pipeline, PLC automatic control system, online monitoring module, bypass pipeline, urea heat tracing & insulation assembly, sensors for pressure, temperature, NOₓ and ammonia slip. Customized flue gas collecting manifold for 2×800kW units. The system automatically adapts to flue gas flow under single-unit or dual-unit operation, and dynamically adjusts urea injection rate.

Technical advantages

1、Synergistic removal of multiple pollutants: Single system removes PM, CO, HC and NOₓ simultaneously. Front DOCF intercepts particles to protect SCR catalyst and extend service life with stable denitrification efficiency.
2.、Adaptive for dual-generator working conditions：Customized for 2×800kW sets, supporting single start-stop or dual full-load operation. PLC adjusts urea injection automatically according to flue gas parameters to guarantee stable emission.
3.、Intelligent control & high safety: Fully automatic PLC operation, real-time monitoring of temperature, differential pressure, NOₓ and ammonia slip. Interlock protection and fault alarm for over-temperature, excessive pressure and high ammonia slip. Emergency bypass valve protects generators against high backpressure.
4、Good low-temperature performance: Heat tracing and insulation on urea pipelines prevent urea crystallization and freezing in cold winter.
5.、Modular design & easy installation: Modular equipment, available as containerized prefabrication or on-site assembly. Optimized piping layout reduces construction work. Components are easy to maintain, filter elements can be regenerated to lower operating cost.
6、Complies with environmental emission requirements at home and abroad.Exhaust emission retrofit for 2×800kW diesel standby generator sets in industrial plants, data centers, hospitals and commercial buildings, complying with China, EU and other regional environmental regulations.