| 摘要 |
PURPOSE:To supply continuously a fixed quantity of a solution in an intermediate tank to a reactor, by constituting so that a liquid level in the intermediate tank provided between a solution storage tank and the reactor is kept constant. CONSTITUTION:For instance, a solution admixed with particle-like chemicals in a solution storage tank 2 having an eductor 3 is made to pass through liquid feed pipes 5, 8 and 12 by a pump 6 and is fed to an intermediate tank 13 having an eductor 14. Liquid level detectors 19, 19' are provided in the intermediate tank 13. A controller 20 consisting of a setting circuit, a compare-operating circuit, an operation commanding circuit, etc. receives a detecting signal from the liquid level detectors 19, 19', controls valves 4, 7, 9, 10, 16 and 18, and controls them so that the liquid level of the intermediate tank is always in a fixed position. A fixed quantity of the solution is always supplied continuously to a reaction tank 1 from the intermediate tank 13 by a head difference H between the liquid level position of the intermediate tank 13 and the supplying part position of the reaction tank 1. |
