介绍大型磷酸二铵(DAP)装置改产NPK的技术方案,包括改产NPK生产工艺流程、技术要点、需增加的设备和设施,以及公用工程变化等。建议在原料系统增加一些设施,根据使用固体或液体原料的不同,采用预中和加管式反应器或只用管式反应器工艺生产NPK,从而实现用一套装置生产DAP及多种NPK产品,提升企业市场竞争力。 This paper introduces the technological scheme of converting large DAP plant into NPK, including converting NPK production process, technical points, equipment and facilities to be added, and public utility changes. It is advisable to add some facilities to the raw material system to produce NPK using pre-neutralization plus tubular reactors or tubular reactor processes based on the use of solid or liquid feedstocks to produce DAP and a wide range of NPK products using one set of equipment , Enhance the market competitiveness of enterprises.