Amid the wave of digitalization, computing power has become the core productive force of the digital era. As critical infrastructure that hosts massive volumes of data, cloud services and internet applications, cloud data centers impose stringent requirements on power supply continuity. Diesel generator sets serve as the final safety barrier of emergency power supply to keep servers, storage and network equipment running when utility power fails.
The operating conditions of backup diesel generators in cloud data centers differ significantly from those of conventional engineering generators. Characterized by long standby periods, infrequent startup, short-duration load operation during power faults, frequent start-stop cycles, wide load fluctuations and low exhaust temperatures, such special operating conditions raise higher requirements for the reliability, backpressure control, regeneration and safety protection of exhaust purifiers. Based on project emission requirements, DOC+DPF soot purification, integrated DOCF+SCR denitrification, and DOC+DPF+SCR integrated exhaust aftertreatment solutions are available for selection.
Green Valley’s DPF diesel particulate filter adopts wall-flow honeycomb ceramic filters to physically trap soot particles. It achieves a soot removal rate of over 95% with Ringelmann blackness ≤ Level 1, meaning no visible black smoke. Given the low operating frequency and difficulty of active regeneration for backup generators, the system adopts a passive regeneration strategy to reduce frequent manual ash cleaning. It is also equipped with real-time backpressure monitoring and automatic bypass protection. When the filter is clogged and backpressure exceeds the threshold, the bypass channel opens automatically to ensure the generator can start and carry load normally and prevent power outage risks.
Green Valley ’s SCR selective catalytic reduction denitrification system adopts precise urea injection and an optimized flow field mixing structure. Under suitable temperature and catalyst conditions, it reduces NOₓ into nitrogen and water, with a maximum denitrification efficiency of 97%. It meets strict emission standards including regional low-NOₓ requirements, Tier 4 and EU Stage V.
Green Valley ’s DOC diesel oxidation catalyst is installed at the upstream position. With precious metal catalysts, it oxidizes CO and HC in exhaust gas into CO₂ and H₂O. Meanwhile, it raises exhaust temperature to create favorable thermal conditions for downstream particulate filtration and denitrification, and also eliminates exhaust odor.
The exhaust purifier for diesel generator sets is not only an environmental accessory for the emergency power system, but also a vital component for the safe, compliant and sustainable operation of computing infrastructure. It adapts to the low-frequency start-stop feature of backup generators to cut frequent maintenance and reduce the workload of operation teams. Equipped with remote control and early fault warning functions, it guarantees stable power supply while enabling the backup generator to operate within emission limits upon startup. It stably controls pollutants such as black smoke, NOₓ and CO to satisfy local atmospheric emission standards.
Post time: Nov-13-2026