Nitrogen-treated-water generating device, nitrogen-treated-water generating method, nitrogen-treated water, and processing method for maintaining freshness of fresh fishery products processed by means of nitrogen-treated water
In order to greatly increase the efficiency of reducing the amount of dissolved oxygen in treated water, this nitrogen-treated-water generating device is provided with: a circulation duct that circulates a fluid a tank that holds treated water and that is provided partway along the circulation duct a nitrogen gas supplying unit that is connected partway along the circulation duct in order to supply nitrogen gas to the treated water that flows out from the tank and a fluid mixing processing unit provided partway along the circulation duct in order to mix the nitrogen gas with the treated water while the nitrogen gas forms a bubble group having ultrafine bubbles by means of applying shearing force to the liquid-gas mixed phase of treated water and nitrogen gas supplied from the nitrogen gas supplying unit. The treated water mixed with the bubble group and emitted from the fluid mixing processing unit is circulated within the tank, and by diffusing the oxygen dissolved in the treated water into the nitrogen gas that is in the form of minute bubbles within the tank, the minute nitrogen gas into which the oxygen diffuses is allowed to float up within the treated water and is allowed to escape from the treated water.本發明之課題係在於大幅地提升處理水中的溶氧量之減低化效率。用以解決課題之手段為,一種氮處理水產生裝置,其特徵為,具備有:循環流路,其用來使流體循環;槽,其設置於循環流路的中途部,用來收容處理水;氮氣供給部,其接續於循環流路的中途部,為了用來對自槽流出之處理水供給氮氣;及流體混合處理部,其設置於循環流路的中途部,用來使剪斷力作用於自氮氣供給部所供給的氮氣與處理水的氣液混相,將氮氣形成為具有超細微的氣泡之氣泡群而與處理水混合,自流體混合處理部流出之混合有氣泡群的處理水係在槽內循環流動,在槽內藉由使溶解於處理水中之氧擴散於成為細微的氣泡之氮氣,使擴散有氧之細微的氮氣在處理水中浮起,並且從處理水脫出。A...氮處理水產生裝置C...控制手段G...回收部J...循環管Jb...回收管K...處理水供給部M...流體混合處理部N...氮氣供給部P...壓送泵R...循環流路S...流體攪拌部T...槽Ta...溫度檢測手段V...壓力調整閥Va...三方切換閥W...處理水
