Optimization of raw material processing route at Zhongyuan Dahuahua: Modification of acidic gas removal unit and methanol feeding
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Optimization of raw material processing routes at Zhongyuan Dahuahua: Methanol feeding to the acidic gas removal unit completed on 2025-11-10. According to a report from Shiyi Huajian in November 2025, the acidic gas removal unit as part of the technical upgrade project carried out by Shiyi Huajian’s subsidiary in Sri Lanka has successfully undergone methanol feeding; this represents a significant breakthrough in the project’s development, marking the start of the final stages of completion and laying the foundation for achieving the annual targets. The technological upgrade for optimizing the raw material route at Zhongyuan Dahuahua involves modifying the air separation, shift, and acidic gas removal units in the coal chemical plant, while keeping the scale of the gasification unit (which produces methanol/ethylene glycol) unchanged. New liquid nitrogen washing facilities are added to supply purified syngas for ammonia synthesis and CO2 gas for the urea production unit. This setup connects the methanol gasification feed gas with the natural gas-based ammonia and urea production systems, enabling seamless switching between different products; gasification can thus be used to produce both ammonia and urea.
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