在小型合成氨生产中,前工段制得的半水煤气脱硫后,需由压缩机抽送,再去变换、碳化,并精炼、合成。一般压缩机进口压力为150毫米水柱,但若前工段供气紧张,压缩机进口压力往往很小。由于没有灵敏可靠的负压报警仪,尽管有气柜水封作安全保证,工人操作时,精神还是十分紧张,担心万一 In the small-scale ammonia production, the semi-water gas obtained in the previous section is desulfurized, which needs to be pumped by the compressor and then transformed, carbonized, refined and synthesized. General compressor inlet pressure of 150 mm water column, but if the previous section of the gas supply tension, the compressor inlet pressure is often small. Because there is no sensitive and reliable negative pressure alarm, despite the gas tank water seal for safety assurance, the operation of workers, the spirit is still very nervous, worried about in case