The PetroChina Dushanzi Petrochemical Tarim 1.2 million tons/year Phase II Ethylene Project achieved successful first-feed commissioning, marking the official commissioning of China's first ethylene plant with fully electric-driven compressors using indigenous technology. Shanghai Nancal Electric Co., Ltd. overcame multiple technical bottlenecks and successfully developed ultra-large capacity, high-reliability medium voltage drives for the million-ton-class ethylene plant. This solution can be applied to both new million-ton-class ethylene projects and retrofit upgrades of existing units.
A well-known domestic chemical enterprise planned to implement an energy-saving, emission-reduction, and capacity-expansion project for its polycarbonate production unit. This included converting the originally steam-driven MVR steam compressor to electric drive. The MVR steam compressor system was originally driven by a high-speed steam turbine (referred to as the steam turbine), directly connected to the drive shaft of the high-speed centrifugal compressor. The NC HVVF series medium voltage drives provided by Nancal Electric delivered excellent high-frequency drive performance and system safety control performance for the high-speed PMSM in this MVR steam compressor "steam-to-electric" retrofit project of a polycarbonate production unit, providing highly reliable and sustainable technical support for the project retrofit.
The aromatic hydrocarbon plant is one of the largest single-train crystallization process facilities in China, with a required annual operation time exceeding 8,000 hours. Nancal Electric's high-capacity water-cooling medium voltage drive stood out due to its superior performance and high-reliability technological advantages. Over two years of operation, the system achieved zero unplanned downtime, meeting all process and reliability requirements for aromatic hydrocarbon production.
In a chemical gasification plant, the propylene compressor plays a crucial role with high demands for operational reliability and stability. Equipment failure can have severe impacts on the plant and downstream production. The plant originally used an imported medium-voltage drive, but its failure rate has been increasing. A significant failure, especially one that cannot be quickly repaired, could halt gasification operations, disrupt downstream production, and lead to substantial economic losses. After extensive research and technical discussions, the user selected Shanghai Nancal’s medium-voltage drive for hot standby, enabling the redundant automatic switching technology of NC HVVF to resolve issues caused by failures in the original imported drive and ensure uninterrupted production.
IndustryPetrochemical ObjectiveIn petrochemical industry, the one of main energy consuming equipment is the pump. The traditional drive solution can only run at the grid with fixed speed through the valve throttling to hydraulic coupling for speed regulation.
IndustryMiningObjectiveAccording to the environmental requirements, the offgas in coking plant needs to be desulfurized and denitrified before discharged.There are 4 induced draft fans on the customer site to guide the coking flue gas to the desulfurization tower and denitrification reactor.