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According to Sinochem New Network, recently, the technical improvement project aimed at increasing the concentration of coal slurry in Wanhua Chemical (Fujian) Co., Ltd.’s gas generation unit, thereby reducing costs and improving efficiency, was successfully completed and approved. This project applies the Sanfeng-grade coal water slurry concentration technology developed by China National Coal Technology & Engineering Group Clean Energy Co., Ltd. to large-scale four-nozzle coal water slurry gasification units, achieving significant benefits in terms of concentration and cost reduction; it provides a new practical reference for energy savings and efficiency improvement for domestic users of four-nozzle gasification systems. It is reported that Phase 1 and Phase 2 of Wanhua (Fujian) gas generation facility employ Texaco single-nozzle and Huali four-nozzle water-coal slurry pressurized gasification technologies, respectively. Phase 1 is equipped with three Ø3200 mm gasification furnaces, with each furnace capable of processing 1,440 tons of coal per day; Phase 2 features two Ø4000 mm gasification furnaces, with each furnace able to process 4,000 tons of coal per day. The pulping unit employs a three-peak graded water-coal slurry concentration technology, which combines rod milling, fine grinding, and ultra-fine grinding in an optimized manner. It allows for precise control of the mixing ratio between fine and ultra-fine slurries, thereby improving the particle size distribution of the final coal slurry and producing high-quality water-coal slurry for use in gasification furnaces. The technical improvement project subject to this acceptance was successfully commissioned for the first time on January 5, and passed the 72-hour performance test on March 24. During this period, the unit operated continuously and stably; under the same raw material conditions, the coal slurry concentration increased by about 3 percentage points, and when non-coal raw materials such as tar were mixed in, the coal slurry concentration increased by about 2.6 percentage points. This technological upgrade has effectively expanded the range of raw coal options available to Wanhua (Fujian). The high-quality coal slurry produced is compatible with both types of furnaces used in gasification units, enabling flexible adaptation and stable supply under complex operating conditions. Furthermore, the project achieves significant improvements in energy efficiency and emission reductions. After preliminary tuning, the effective gas ratio of the four-nozzle gasifier increased by more than 1.5 percentage points.