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阐述硝酸磷肥生产中,硝酸钙与碳铵液反应形成硝酸铵和碳酸钙的工艺过程与工艺指标。生产存在的主要问题是氨耗高,分析其原因是:m(NH3)/m(CO2)控制偏高,平均值均超过0.86;转化料浆pH和CO2过量偏高;转化反应温度偏高(超过70℃)。提出降低氨耗的一些措施。
In the process of nitrophosphate production, the process and process of the reaction between calcium nitrate and ammonium bicarbonate to form ammonium nitrate and calcium carbonate are described. The main problem of production is the high ammonia consumption. The reasons for the analysis are as follows: the control of m (NH3) / m (CO2) is relatively high with the average values exceeding 0.86; the conversion slurry is too high in pH and CO2 excessively; Over 70 ° C). Some measures to reduce ammonia consumption are proposed.