徐圩新区达标尾水排海工程海域管道设计探讨

江苏省连云港市徐圩新区达标尾水排海工程将达标尾水通过海域管道输送至尾水扩散器,利用海洋净化功能达到最终处理目的。工程设计中对前期海域管道方案进行优化,采用DN1 400的单根Q235B钢管,扩散管总长度为300 m,使用100根上升管,每根上升管装有2个DN65的喷口,末端采用橡胶鸭嘴阀装置,管道内防腐采用磷化底漆加两道环氧沥青漆,外防腐采用3PE涂层加阴极保护(牺牲阳极法),为达标尾水排海工程的顺利建成提供了技术支撑,对保护该区的水体环境安全、促进该区可持续经济发展起到至关重要的作用。

Discussion on Design of the Pipeline for Wastewater Meeting Quality Requirement Discharging into the Sea in Xuwei New District

In Xuwei new district of Lianyungang City, Jiangsu Province, the wastewater meeting discharge quality requirement was discharged into the sea by a sea pipeline with diffusers, and the final treatment would be achieved by using the purification function of seawater. The preliminary design plan of sea pipelines was optimized. The single DN1 400 steel pipe with Q235B was used in the design plan. The total length of the diffuser pipe was 300 m. The number of 100 ascension pipes were used in the diffuser which was equipped with two DN65 spouts. The rubber duckbill valve device was used in the end of spout. The inner anticorrosion pipe was made of phosphating primer and two epoxy asphalt paints, using 3PE coating plus cathodic protection ( sacrificial anode method ) for external corrosion protection. The completion of the project could provide the technical support and played a crucial role in the protection of the water environment safety and the sustainable economic development.