“SHS”法是针对中小型全循环法尿素装置状况而提出的节能增产并举的方案。基本思路是:(1)采用新颖结构的尿素合成塔,以等温合成概念进行设计,改善尿素合成工况;(2)充分挖掘现有设备潜力。在小型装置上实施,可使尿素产量由140吨/天～180吨/天提高至320吨/天～380吨/天,中型装置的产量可增加约10％,二者均可节能30％。 “SHS” law is for small and medium-sized full-cycle urea plant put forward the situation of energy-saving program to increase production simultaneously. The basic idea is: (1) Uses the novel structure urea synthesis tower, designs with the isothermal synthesis concept, improves the urea synthesis condition; (2) Fully tap the existing equipment potential. When implemented on small plants, the urea output can be increased from 140 tons / day to 180 tons / day to 320 tons / day to 380 tons / day, while the production of medium plants can be increased by about 10%, both saving 30%.