分岐管式給炭装置を用いた石炭の水力輸送に関する研究
1966 年 82 巻 936 号 p. 333-341
詳細
1966 年 82 巻 936 号 p. 333-341
The results of fundamental experiments revealed that the coal filled in a pipe was moved by low water pressure, and it flowed in a pipeline with little delay when velocity of stream exceeded 3.5m/s. According to these results a multi-pipe type coal feeder was invented. It consists of several parallel long lock chambers which are branched from a delivery pipe of a high pressure pump. And they have approximately the same diameter of the conveying pipe. One of these is fed coal and water mixture by means of a low pressure sand pump. After this, the mixture is pushed into the conveying pipe by the high pressure water. This process is repeated one after another, and coal is transported continuously.
The auther produced a hand-operated model of this coal feeder for laboratory tests, then made its valves act automatically. The practical tests of this feeder was carried out at Yoshima colliery. 20.000t of coal was transported by 7 in. pipeline with it. The test results revealed that it had the transporting capacity of 100t/h, registering the volume concentration 20% Now the test is continued on commercial basis at Sunagawa colliery. The transportation height is 490m and the length of pipeline 2, 046m. There automatic control of concentration of coal in the pipeline is attemped to economize the transportation cost.
