| 摘要 |
PROBLEM TO BE SOLVED: To provide a device capable of high-precision concentration control in producing a dilute sodium hypochlorite aqueous solution such as drinking water. SOLUTION: The chemical solution injecting device to produce a dilute chemical solution by injecting a chemical (sodium hypochlorite) solution into raw water has a raw water channel divided into two shunt channels 3, 4. The shunt channel 3 is provided with a chemical injecting part 5 for injecting the chemical solution and a concentration sensing means 8 for detecting the chemical concentration at the downstream of the chemical injecting part 5. At the downstream of the concentration sensing means 8, the shunt channel 3 joins the shunt channel 4 again. The chemical concentration is controlled by regulating the amount of the chemical solution injected by the chemical injecting part 5 on the basis of the chemical concentration sensed by the concentration sensing means 8, or by regulating the ratio of the shunting of the shunt channel 3 and the shunt channel 4. COPYRIGHT: (C)2007,JPO&INPIT
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