地下泥漿管路清淤安全裝置之設計

燃煤電廠將煤炭燒燼後的灰渣，混合海水形成泥漿（slurry），泵送至灰塘填海造地。泥漿管路由地上轉入地下涵洞之間的管路容易淤積灰渣而堵塞，清理淤積時，需拆卸管節法蘭（flange）進行吊掛作業後清除管內淤積，由於涵洞空間狹窄，使人員有被物件撞擊的危險，且傳統泥漿管路設計之洩水管朝向地面時會遭灰渣堵塞，朝上又無法洩除該高程以下之液體而使洩水管失去部分作用，因此研擬在地下涵洞中，橫向管路連接彎管的上緣處，增設本研究整合洩水管閥等多項安全設計的清淤裝置，以鋼管標準配件組合而成，價格低廉、工法簡單，對泵浦流量影響微小，可增設於既有管路監控淤積或破管程度，洩水後打開本裝置蓋子以真空吸泥車之吸泥管吸出即可，大幅降低作業難度及安全風險。

關鍵字

灰塘；泥漿管；淤積；安全

並列摘要

The coal-fired power plant mixes seawater with ash from coal burning to form slurry. The slurry flow is then pumped through the slurry pipe to the ash pond for reclamation. The ash particles are deposited when the slurry pipe to go vertically into the vertical well then turn into the culvert. When cleaning the silt, the flange needs to be disassembled and then hoisted to separate the pipe joints in order to remove the ash from the pipe. However, the working space in the well is very narrow and likely to cause damage due to falling objects and collisions. Slurry pipe traditional design makes drain pipe deposited when drain pipe towards the ground and drain pipe can not discharge low level liquid when drain pipe faces up. According to the research and analysis, a safety dredging device (with a drain pipe included) can be added to the connecting point of the upper edge of the elbow and the horizontal pipe in the well. The safety dredging device can be installed without using high hardness steel or wear resistant layer, making it easy to cut into the required size on site. It is a labor safety and economical method of dredging because you can drain the water and open the device to remove the ash at any time.