| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for eliminating stains inside a liquid feed pipe without using a cleaning liquid or halting the operation of a plant. <P>SOLUTION: This method for eliminating stains inside the liquid feed pipe is characterized in that the stains inside the liquid feed pipe accompanied with deposition of solutes in a solution are eliminated by mixing a gas into the discharge part of a liquid feed pump in a plant continuously transferring the solution. In the above method, it is preferable that the solution is cooling wastewater of a polymer in a polymer pelletizing process and an aqueous solution containing the eluted additives of the polymer. In the figure: 1 is wastewater of the pelletizing plant, 2 strainer, 3 wastewater pit, 4 wastewater pump, 5 air piping, 6 level controller, and 7 liquid feed pipe to wastewater treating facilities. <P>COPYRIGHT: (C)2004,JPO&NCIPI</p> |
