Research on mining method of submarine natural gas hydrates based on a double-channel lift pump
Based on the geological characteristics of the submarine natural gas hydrates storage and the requirement of the mining environment, combined with the deep sea mining technology and the main characteristics of the double-channel lift pump, a new mining method called the mining method of submarine natural gas hydrates based on a doublechannel lift pump is proposed in this paper , whose operating principle is that the hydrates are firstly cut into particles and extracted by a spiral reamer of a mining vehicle, next hoisted by a double-channel lift pump to the decomposing pool on the surface, and then decomposed and collected. After the mining method has been introduced, the hydraulic hoisting system parameters such as the pump head of the double-channel lift pump and the hoisting system parameters are analyzed. From calculation and analysis, it is obtained that the gas hydrate particles at the depth of 4000 m pumped up to the sea surface require the pump head only 145 m and the working power only 236 kw,which can be easily implemented by the existing technology, and the hydrates at the depth of 1000 m pumped up to the sea surface just require the pump head about 50m and the working power about 80kw, which the existing doublechannel slurry pump can meet the requirements. Because the density of the mixture flow of the gas hydrates, the seafloor surface sediments and the seawater is similar to the seawater, the transportation mode that the hydrates are transported as ore slurries directly can ensure that the hoisting system keep working steadily and reliably for a long time. It is proved theoretically that the mining method is suited to exploit the submarine natural gas hydrates.
Mining method Submarine natural gas hydrates Double-channel lift pump Deep sea
Yicong Zeng Hailiang Xu Wanrong Wu Bo Wu
School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China Sc School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China
国际会议
厦门
英文
509-516
2012-06-05（万方平台首次上网日期，不代表论文的发表时间）