DIFFERENT KIND OF LIQUID MIXING DEVICE AND WATER TREATMENT FACILITY

To provide a different kind of liquid mixing device capable of mixing a second liquid injected from an injection port into a flow course with a first liquid by sufficiently agitating the second liquid within the flow course.SOLUTION: In a different kind of a liquid mixing device 4 for injecting a second liquid 16 into a flow course 20 with a first liquid 2 flowing to mix them, a plurality of line mixers 9, 10 are connected in series, the respective line mixers 9, 10 sequentially have a second straight pipe part 32, an enlarged diameter part 33 with an inner diameter becoming larger as it goes downstream, and a third straight pipe part 34 having an inner diameter larger than the inner diameter of the second straight pipe part 32 from an upstream side of the flow course 20, an injection port 38 of an injection course 37 for injecting the second liquid 16 into the first liquid 2 is plunged into the line mixer 9 at an uppermost upstream end to be open, and the injection port 38 is opened at a position corresponding to the inside of the third straight pipe part 34 in an axial direction L of the flow course 20 and at a middle vicinity position between an inner surface of the second straight pipe 32 and an inner surface of the third straight pipe part 34 in the radial direction R of the flow course 20.SELECTED DRAWING: Figure 3 【課題】注入口から流れ経路内に注入された第２液体を流れ経路内で十分に攪拌して第１液体と混合することができる異種液体混合装置を提供する。【解決手段】第１液体２が流れる流れ経路２０中に第２液体１６を注入して混合する異種液体混合装置４であって、複数のラインミキサー９，１０が直列に接続され、各ラインミキサー９，１０は、流れ経路２０の上流側から、第２直管部３２と、内径が下流側ほど拡大する拡径部３３と、第２直管部３２の内径よりも大きい内径の第３直管部３４とを順次有しており、第２液体１６を第１液体２中に注入する注入経路３７の注入口３８が最上流端のラインミキサー９内へ突入して開口し、注入口３８は、流れ経路２０の軸方向Ｌにおいて第３直管部３４内に対応した位置で且つ流れ経路２０の径方向Ｒにおいて第２直管部３２の内面と第３直管部３４の内面との中間近傍位置で、開口している。【選択図】図３