我国近二十年多年来先后从荷兰、意大利等国引进大型氮肥装置约 2 0套。装置中的汽提塔、合成塔等高压设备的液位测量均采用了德国Ｂｅｒｔｈｏｌｄ公司或美国Ｏｈｍａｒｔ公司的γ射线液位计 ,这些液位计都采用了棒状γ放射源。原引进大氮肥装置用的γ棒源的高成本在于它的呈 Over the past two decades, China has successively introduced about 20 sets of large-scale nitrogenous fertilizer installations from the Netherlands, Italy and other countries. Devices such as the stripper, tower and other high-pressure equipment, liquid level measurement using the German Berthold company or the United States Ohmart’s gamma-ray level gauge, these level gauges are using a rod-shaped γ-ray source. The original cost of introducing a large source of nitrogen fertilizers is its high cost