XIAOQuan,DENGPei,CHANGChao,et al.Flow Monitoring Method of Sewage Deep Tunnel Drainage System in Wuhan Dadong Lake[J].China Water & Wastewater,2022,38(10):95-100.
Flow Monitoring Method of Sewage Deep Tunnel Drainage System in Wuhan Dadong Lake
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第10期
Page:
95-100
Column:
Date of publication:
2022-05-17
- Keywords:
- sewage deep tunnel drainage system; flow monitoring; ultrasonic cross-correlation flowmeter; cross section velocity distribution
- Abstract:
- Deep tunnel system has been applied to alleviate urban waterlogging and overflow pollution both at home and abroad. The key technology for the successful operation of a deep tunnel system depends on the flow monitoring of the deep tunnel, which needs to select the appropriate flow monitoring method according to the characteristics of the deep tunnel system.Through technology comparison, the ultrasonic flowmeter based on the principle of ultrasonic cross-correlation was selected as the flow monitoring equipment in a deep tunnel system in Wuhan Dadong Lake. The equipment realized visualized real-time flow rate monitoring and pipeline cross section scanning, which operated stably for long periods under 400 kPa water pressure and extreme conditions in the deep tunnel. The flow rate of 16 layers in the deep tunnel section was measured by the ultrasonic cross-correlation flowmeter. The results showed that the flow rate near the pipe wall was much lower than the average flow rate. Therefore, taking average rate as the evaluation criterion of non-silting flow rate of deep tunnel will bring silting risk to the operation of the deep tunnel.
Last Update:
2022-05-17