The interference of the acid solution with the laver net of the raw liquid discharge part is reduced more than the conventional one.Solution: a processing tank for storing an acid treatment liquid, a roll which is provided inside a processing tank, rolls around a laver net, is provided in a processing tank along the roll, a discharge part for discharging the acid raw liquid, and a supply device for supplying the acid raw liquid to the discharge part, and the discharge part is a through hole formed in the processing tank The raw liquid is supplied from the outside of the treatment vessel in the through hole.Diagram【課題】酸原液を原液吐出部の海苔網との干渉を従来よりも低減する。【解決手段】酸処理液を貯留する処理槽と、処理槽の内側に設けられ、海苔網を巻き付けるロールと、ロールに沿って処理槽に設けられ、酸原液を吐出する吐出部と、酸原液を吐出部に供給する供給装置とを備え、上記吐出部は、処理槽に形成された貫通孔を備え、貫通孔において処理槽の外側から酸原液が供給される。【選択図】図２
