分析水溶液全循环法尿素装置能耗高的原因，介绍改进型溶液法的特点。

This article analyses the cause of high energy consumption of urea plant with aqueous solution total recycle process and the feature of modified aqueous solution process.

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该文介绍了热循环尿素工艺的主要技术特点及工艺流程，并就该工艺的特点对水溶液全循环法尿素生产装置的增产节能改造提出了参考意见。

Introduce the main technical features and process flow of heat-cycle urea process. Also put forward some Suggestions for the expansion of heat-cycle urea plant.

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