关键词: 水煤浆气化, 煤制氢装置, 开工方案优化, 开工线, 气化工段, 变换工段, 联锁跳车, 黑水温度

Abstract:

The industrial application of start-up line of coal water slurry gasification section and transformation section is discussed and optimized. Corrosion, abrasion, easy blockage of pipes and equipment and other problems exist in the gasification process, which directly affect the start-up and shutdown process, stable operation and service life of the gasification unit. Therefore, it is necessary to optimize by adding flash system across the line in the gasification section. Establish the closed circulation of black water between the gasifier and the carbon washing tower, speed up the heating rate of black water, shorten the start-up time of the gasification section to 0.5 hours, and realize the maintenance of the flash system without shut down the gasification. In the transformation section, the catalyst can only be active at a certain temperature. During formal production, the bed shall be heated up in advance before the crude synthetic gas is introduced. The heat source for heating up comes from the external electric heater. The nitrogen circulates through the compressor as the heat carrier. An independent heating pipeline is added to heat up the catalyst bed in the transformation furnace, which shortens the circulation process, reduces the system resistance drop, and reduces the compressor power consumption. After optimization, the direct cost of start-up can be saved by 100,000 yuan each time, and the investment can be recovered within two to three overhaul cycles. The start-up line runs stably and reliably with remarkable benefits.

Key words: coal water slurry gasification, coal to hydrogen plant, optimization of start-up scheme, start-up line, gasification section, transformation section, interlocking tripping, black water temperature