| 摘要 |
A method of feeding chemical to a liquid flowing in an open space, the method including: feeding the chemical to the liquid by at least one special mixing device; introducing a feed liquid to the at least one special mixing device separately from the chemical; contacting the chemical and the feed liquid together essentially simultaneously with the discharge of the chemical and the feed liquid through a nozzle opening of the mixing device, wherein the nozzle opening is located under a surface of the liquid flowing into the open space.
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