200902140 九、發明說明 【發明所屬之技術領域】 本發明係關於一種例如高效率地混合海水脫硫裝置之 排海水與稀釋海水之流體的混合流路構造及混合方法。 【先前技術】 以往，從脫硫塔排出的排海水，係進行一種在進行充 氣（aeration)之後再排放至海域中之作業作爲環境對策。 然而，在排放至海域中之前，由於會按照需要而調整排放 海水（排海水）之性狀（PH、DO、COD等）’所以有混合新 (fresh)的稀釋海水之情況。 作爲混合該種排放海水及稀釋海水的混合流路構造， 已知者有一種使流出排放海水之排放水路、與流出稀釋海 水之導水路或導水管匯流的水路混合方式。另外，在將脫 硫塔之排海水予以稀釋並排放的情況時，由於通常處理的 排海水較爲多量，所以相對於流路截面積較大之排放水路 可採用使流路截面積較小之導水路或導水管匯流的混合流 路構造。 在此，係根據第19圖至第22圖簡單地說明採用上述水 路混合方式的混合流路構造。 第19圖及第20圖所示的混合流路構造，係以流出排海 水的排放水路1與流出稀釋海水的導水路2會在大致同一水 面WL上正交的方式匯流成T字狀。然後，如第22圖所示 ，在排放水路1，設置有距離與導水路2匯流的匯流位置3 -5- 200902140 所必要的混合距離L。該混合距離L，係爲藉由流動來混 合匯流後的排海水及稀釋海水，且形成被稀釋成性狀爲預 定値以下之大致均一濃度後的混合海水所必要的排放水路 1之流路長度。因而，流動於排放水路1的排海水，係在混 合距離L之間成爲與稀釋海水大致均一地混合後的混合海 水並排放至海域中。 又，第21圖所示的混合流路構造，係採用導水管4來 取代導水路2。該導水管4，係在比流動於排放水路1的排 海水之水面還較低的位置匯流成T字狀，且在設置於匯流 位置3之下游的混合距離L之間成爲與稀釋海水大致均一 地混合後的混合海水並排放至海域中。 另外，並未發現關於一種在將從脫硫塔排出的排海水 排放至海域時，可縮短混合稀釋海水以成爲大致均一地稀 釋後的混合海水所必要的混合距離L之混合流路構造的技 術文獻。 【發明內容】 (發明所欲解決之問題） 然而，採用上述習知之水路混合方式的混合流路構造 ’由於係使稀釋海水從水路側面流入於排放水路1並予以 混合，所以在完成大致均一的混合海水之混合作業之前需 要較長的混合距離L。此可看作係因相對於排海水之流動 使稀釋海水從側面匯流，而使排放水路1內之稀釋海水受 到排海水之流動極大的影響，因而，稀釋海水，在排放水 200902140 路1之流路寬度方向’無法容易地到達（橫斷）已流入的側 壁之相反側所致。 然後’爲了設置上述混合距離L較長的排放水路1， 需要較大的地基以及巨額的建設費用。因此，在將從脫硫 塔排出的排海水排放至海域時，爲了稀釋排放於符合預定 環境基準的混合海水中，用地確保或建設費增大等的問題 成爲極大的障礙。另外，上述的混合距離L，係依排海水 及稀釋海水之流量或水路形狀等的諸條件而異。 本發明係有鑒於上述之情事而開發完成者，其目的在 於提供一種可減低雙流體之混合所必要的混合距離L，且 可進行高效率之混合之流體的混合流路構造及混合方法。 (解決問題之手段） 本發明係爲了解決上述課題，採用如下手段。 本發明之第1態樣的流體的混合流路構造，係使流動 於第2流路的稀釋流體匯流至流動於第1流路的被稀釋流體 中並將稀釋後的混合流體予以排放之流體的混合流路構造 ，其特徵在於：使前述第2流路從流路側面匯流至流動於 前述第1流路的被稀釋流體之水中，並且在前述第2流路與 前述第1流路之匯流部水中設置堰，用以限制前述被稀釋 流體流動於流路流動方向之底面部的流動。 依據該種流體的混合流路構造’則由於使第2流路從 流路側面匯流至流動於第1流路的被稀釋流體之水中’並 且在第2流路與第1流路之匯流部水中設置堰’用以限制被 200902140 稀釋流體流動於流路流動方向之底面部的流動，所以可減 低從流路側面匯流後的稀釋流體受到被稀釋流體之流動的 影響，可使流入於第1流路內的稀釋流體容易地到達流路 寬度方向之相反側側壁。 該情況，設置於第2流路與第1流路之匯流部水中的堰 ，雖然只要至少設置於第2流路之流路寬度之下游側的近 旁位置即可，但是較佳爲設置於第2流路之流路寬度之上 游側及下游側的近旁位置之兩側。又，該情況的堰，與流 路於第2流路之稀釋流體所匯流的位置相較，係以設置於 相同或較高的位置爲佳。另外，作爲使稀釋流體從流路側 面匯流至被稀釋流體之水中的手段’只要採用所謂的潛堰 或導水管即可。 本發明之第2態樣的流體的混合流路構造’係使流動 於第2流路的稀釋流體匯流至流動於第1流路的被稀釋流體 中並將稀釋後的混合流體予以排放之流體的混合流路構造 ，其特徵在於：使前述第2流路從流路側面匯流至流動於 前述第1流路的被稀釋流體之水中’並且在使前述第2流路 匯流後的前述第1流路之匯流部’於從成爲前述第2流路的 流路寬度之上游側及下游側的水中位置，及於流路寬度地 設置有高於前述第2流路之流路高度以上的堰。 依據該種流體的混合流路構造，則由於使第2流路從 流路側面匯流至流動於第1流路的被稀釋流體之水中’並 且在使第2流路匯流後的第1流路之匯流部，於從成爲第2 流路的流路寬度之上游側及下游側的水中位置’及於流路 200902140 寬度地設置有高於第2流路之流路高度以上的堰，所以可 減低從第1流路之流路側面匯流至被稀釋流體之水中的稀 釋流體，受到被稀釋流體之流動的影響，可使流入於第1 流路內的稀釋流體容易地到達流路寬度方向之相反側側壁 。另外，作爲使稀釋流體從流路側面匯流至被稀釋流體之 水中的手段，只要採用所謂的潛堰或導水管即可。 在關於上述第1態樣或第2態樣之流體的混合流路構造 中’較佳爲，在前述下游側之堰的上端部，形成有朝流路 流動方向延伸的平面部，藉此，水深會變淺可形成縮窄流 路截面積的區域。在該區域中，由於匯流後的被稀釋流體 及稀釋流體會匯流並增加流速，所以可促進兩流體的混合 擴散。另外，該情況的平面部，亦可只在堰之下游側、上 游側、或是下游側及上游側中之任一側。 較佳爲，在該種平面部之水流表面形成有凹凸，藉此 ，流動可藉由凹凸而成紊流進而促進混合。 在上述的任一個流體的混合流路構造中，較佳爲，配 置於前述第2流路之流路寬度的上游側之堰，係在前述第1 流路之流路寬度方向，從使前述第2流路匯流後的流路壁 側起點朝相對向的流路壁側終點，向前述被稀釋流體之流 動方向下游側傾斜，藉此，在第1流路之流路寬度方向， 可使稀釋流體均一地分佈並混合於被稀釋流體中。 本發明之第3態樣的流體的混合方法，係使流動於第2 流路的稀釋流體匯流至流動於第1流路路的被稀釋流體中 並將稀釋後的混合流體予以排放之流體的混合方法，其特 200902140 徵在於：使前述稀釋流體從流路側面匯流至前述被稀釋流 體之水中，並且以前述稀釋流體與前述被稀釋流體之匯^ 部，限制前述被稀釋流體沿著前述第1流路的流動方向流 動的流路底面部側之流動。 依據該種流體的混合方法’則在使流動於第2流路的 稀釋流體匯流至流動於第1流路路的被稀釋流體中並將稀 釋後的混合流體予以排放之流體的混合方法中’由於使稀 釋流體從流路側面匯流至被稀釋流體之水中’並且以稀釋 流體與被稀釋流體之匯流部，限制被稀釋流體沿著第1流 路的流動方向流動的流路底面部側之流動，所以可減低從 流路側面匯流後的稀釋流體受到被稀釋流體之流動的影響 ，且流入於第1流路內的稀釋流體，可容易地到達流路寬 度方向之相反側側壁。 (發明效果） 依據上述的本發明，則可提供一種在例如將混合有從 脫硫塔排出的排海水與稀釋海水而得的混合海水排放於海 域中的情況’可減低雙流體之混合所必要的混合距離L , 且可進行高效率的混合之流體的混合流路構造及混合方法 。因而’可縮短混合距離L之本發明的混合流路及混合方 法’可獲得減低包含流體混合用之流路構造的工廠設備建 設所必要的地基或建設費’且可增加設計自由度的顯著效 果。 -10- 200902140 【實施方式】 以下，係根據圖式說明本發明之流體的混合流路構造 及混合方法之一實施形態。 <第1實施形態> 第1圖至第3圖所示的混合流路1 〇，係被使用於例如藉 由將新的稀釋海水混合於從排煙脫硫裝置之脫硫塔排出的 多量排放海水（排海水）中，以排海水之性狀符合環境基準 等的方式當作被稀釋後的混合海水而排放於海域中的情況 。亦即，圖示的混合流路1 〇，係具備流出排海水（被稀釋 流體）的排放水路（第1流路）11 ;以及流出稀釋海水（稀釋流 體）的導水路（第2流路）12，二個水路1 1、12，係使其中一 方的導水路12與其中另一方的排放水路11正交，並朝其中 —方的流路側面1 1 a匯流成T字狀。換言之，混合流路1 0 ，係形成爲了流出比較少量的稀釋海水而流路截面積亦變 得較小的導水路1 2，相對於爲了流出多量的排海水而流路 截面積較大的排放水路1 1之流路側面1 1 a，匯流成T字狀 的結構。 另外，本實施形態中的排放水路11及導水路12，係均 爲流路剖面形狀爲矩形之開放水路，且排海水及稀釋海水 之水面WL係成爲同一局度。 在排放水路1 1與導水路1 2所匯流的匯流位置1 3，爲了 要限制排海水流動於排放水路1 1之流路流動方向（圖中之 鏤空箭頭F)的底面部之流動，而從排海水之流動方向上 -11 - 200902140 游側開始，依序於匯流部水中設置有第1堰1 4及第2堰1 5。 該情況的第1堰14及第2堰15，係以與導水路12之流路 寬度Wd大致一致的間隔平行地配置，且橫斷排放水路11 之流路寬度Wh而以與排海水之流動方向正交的方式設置 。亦即，第1堰14及第2堰15，係在將形成導水路12的左右 一對之側壁1 2a予以延長的位置相對向並從水路底面1 1 b 大致垂直地豎設，形成用以限制從排放水路1 1之水路底面 lib至高度Η之底面部流動的壁面。 上述的第1堰1 4及第2堰1 5，係只要形成具有足以承受 水壓之強度的壁面即可，因而，在本實施形態中，例如可 採用較薄的混泥土製之壁面等。但是，第1堰1 4及第2堰1 5 ，並未被限定於混泥土製，例如亦可採用鋼鐵構造體或鋼 板等。 另一方面，在導水路1 2，爲了使稀釋海水從流路側面 1 1 a匯流至排放水路1 1內之排海水、即流動於排放水路1 1 內的排海水之水中，而在導水路1 2之出口 1 2b設置有第3 堰1 6。該第3堰1 6，一般被稱爲潛堰，用以限制導水路1 2 之上部流動，並且將底面部側予以開口而形成稀釋海水之 流路。該情況之第3堰1 6，係以從流路底面至高度h的範 圍開口而形成稀釋海水之流動的方式所設置的潛堰，因而 ，被設定於與流路底面1 1 b距離高度h比水面WL還低的 位置。另外，圖中之鏤空箭頭f，係顯示稀釋海水之流動 方向。 又，由第3堰1 6所形成的稀釋海水之流路高度h，係 -12- 200902140 以與上述的第1堰14及第2堰I5之高度Η相同或還低（h$H) 的方式而設定。因而，由於第1堰14及第2堰15之咼度Η 比水面WL還低，所以從導水路1 2通過高度h之開口部而 匯流的稀釋海水，必然會匯流至排海水之水中。 如此，上述的混合流路1 0 ’係朝流動於排放流路1 1的 排海水之水中，使稀釋海水從排放水路1 1之流路側面1 1 a 所開口的出口開口被限制於高度h的導水路1 2匯流’並且 由於在使該稀釋海水匯流後的排放流路1 1之匯流部1 3 ’具 備用以將排海水之底面部流動限制於高度Η的第1堰1 4及 第2堰1 5，所以匯流至排放流路1 1的稀釋海水’會通過形 成於第1堰丨4及第2堰1 5之間的橫斷流路，而在可減低受到 排海水之流動的影響之狀態下’橫穿流路寬度Wh之排放 流路11而朝相反側之側壁11 c流動。 亦即，藉由高度Η之第1堰1 4及第2堰1 5而形成的橫 斷流路1 7由於遍及地設置於流路寬度Wh ’所以從出口開 口之高度依第3堰1 6而被限制於h的導水路1 2匯流至排海 水之流動（水中）的稀釋海水，其主流會通過藉由第1堰1 4 及第2堰1 5而限制流動的橫斷流路1 7並可容易地到達相反 側之流路側面（側壁）1 1 c ° 然後，流動於橫斷流路1 7的稀釋海水，由於係藉由第 1堰14及第2堰15而限制流路底面1 lb側之流動，所以對於 在依流路截面積減少而增加流速的狀態下流動於上方的排 海水，在朝流路寬度Wh之方向流動時會以朝上方溢出的 方式依次匯流，故而會發生流動之紊流而高效率地混合。 -13- 200902140 因此，在排放流路Π之流路寬度wh方向’由於稀釋海水 會大致均一地匯流至流動於排放流路1 1之排海水中而混合 ，所以可縮短排海水與稀釋海水匯流而使流動全體成爲大 致均一之性狀所必要的混合距離L。 而且，有關上述的第1堰14及第2堰15之高度Η與出 口開口之高度h的關係’由於稀釋海水會匯流至比橫斷流 路17之高度Η還低的水中’亦即出口開口之高度h越設 定爲比堰之高度Η還低就越不易受到排海水之流動的影 響，所以較佳。但是，即使在稀釋海水所匯流的高度h比 橫斷流路1 7之高度Η還高的情況’雖然混合距離L多少 會延長，但是若有由第1堰14及第2堰15所形成的橫斷流路 1 7，則由於可利用排海水之底面部來限制流動，所以比完 全沒有橫斷流路1 7的情況還更能減低混合距離L ° <第2實施形態> 其次，就本發明之流體的混合流路構造，根據第4圖 及第5圖說明第2實施形態。另外，在與上述實施形態同樣 的部分附記相同的元件符號，並省略其詳細說明。 而且，在上述實施形態中，雖然係將第1堰14及第2堰 1 5形成較薄的混泥土製之壁面，但是在本實施形態的混合 流路1 〇 A，係採用於上端部形成有朝流路流動方向F延伸 之平面部20的第2堰15A，作爲設置於排海水之流動方向 下游側的堰。亦即，第2堰1 5 A，係在排海水之流動方向 ，設爲形成有平面部20的柱狀構件，該平面部20係與強度 -14- 200902140 上所必要之寬度（厚度）相較具有足夠大的長度α。另外， 在該情況的第2堰1 5 A，可採用例如混泥土製或鋼鐵構造 體。 一旦採用該種的第2堰15A，就會在橫斷流路17之下 游側遍及於平面部2 0之長度α形成有流路截面積較窄的排 放水路1 1。因此，流動於平面部2 0的混合海水，由於除了 排海水之外只增加從橫斷流路1 7所匯流而得的稀釋海水之 流量份，所以混合海水之流速會增加，並且也增大流動的 紊流。因而’在平面部2 0之區域，由於流動於排放水路！ } 而來的排海水與從橫斷流路1 7所匯流而得的稀釋海水被混 合擴散所以可高效率地確實混合，即使以更短的混合距離 L亦可將流動全體形成大致均一的性狀。 接著，將上述的平面部20之變化例顯示於第6圖至第8 圖並加以說明。另外，在與上述實施形態同樣的部分附記 相同的元件符號，並省略其詳細說明。 第6圖所示的第1變化例之平面部20 A，係更形成於安 裝在第1實施形態所示的第2堰1 5之上端的板狀構件2 1之上 端面。該情況的板狀構件21，由於係從第2堰15之上端朝 向流路流動方向F之下游側安裝成L字狀，所以亦可獲得 與上述第2實施形態之第2堰15A實質相同的作用效果。亦 即，從第2實施形態所示的柱狀之第2堰1 5 A中’將形成無 助於流動之面的部分予以去除所得者。 第7圖所示的第2變化例之平面部2〇B’係與安裝於下 游側的第1變化例之板狀構件2 1不同’藉由從第2堰1 5之上 -15- 200902140 端朝向上游側安裝所得的板狀構件2 2之上端面所形成。若 依據該種的構成’則由於從橫斷流路1 7匯流至排海水的流 路寬度會被縮窄至/3，所以匯流至排海水的稀釋海水可在 排放水路π之流路寬度Wh方向更被均一化。另外，與上 述第2實施形態及第1變化例相同，在平面部20B之區域， 由於流動於排放水路1 1而來的排海水與從橫斷流路1 7所匯 流而得的稀釋海水會被混合擴散所以可高效率地確實混合 ，且即使在更短的混合距離L亦可將流動全體形成大致均 一的性狀。 第8圖所示的第3變化例之平面部20C，係組合上述第1 變化例及第2變化例而得者，藉由安裝於下游側的板狀構 件2 1及安裝於上游側的板狀構件22之上端面所形成。另外 ，該情況的板狀構件2 1、22，可爲不同個體或爲一體中之 一種。 若爲該種構成，則由於從橫斷流路1 7匯流至排海水中 的流路寬度會被縮窄至；S，所以匯流至排海水的稀釋海水 可在排放水路1 1之流路寬度W h方向更被均一化，更且， 在平面部20C之區域，由於流動於排放水路1 1而來的排海 水與從橫斷流路1 7所匯流而得的稀釋海水會被混合擴散所 以可高效率地確實混合，且即使在更短的混合距離L亦可 將流動全體形成大致均一的性狀。 <第3實施形態> 其次，就本發明之流體的混合流路構造’根據第9圖 -16- 200902140 說明第3實施形態。另外，在與上述實施形態相同的部分 附記相同的元件符號，並省略其詳細說明。 而且，上述實施形態中，雖係平行地配置第1堰1 4及 第2堰1 5 A，但是本實施形態之混合水路1 〇B，係在排放水 路1 1之流路流動方向F中使配置於上游側的第1堰1 4 A傾 斜。具體說明，配置於導水路12之流路寬度Wd之上游側 的第1堰1 4A，在排放水路1 1之流路寬度Wh方向，係從使 導水路1 2匯流而成的流路壁側起點s朝相對向的流路壁側 終點E，朝排海水之流動方向下游側傾斜。 亦即，第1堰1 4 A，係以連結於使導水路1 2匯流而成 的流路側面1 1 a之流路壁側起點s比連結於流路側面1 1 c 的流路壁側終點E還成爲上游側的方式而傾斜，所以形成 於匯流位置1 3 A的橫斷流路1 7 A之流路截面積，會隨著離 開導水路1 2之匯流側側壁面而逐漸減少。 藉由形成該種的橫斷流路1 7 A，則流動於橫斷流路 1 7 A的稀釋海水之分佈就會在流路寬度Wh之方向均一化 。換言之，橫斷流路1 7A之平面視流路寬度Wf，由於係 在流路中途匯流至排海水中並且越靠近流量減少的流路終 點E側就越變窄，所以流動於橫斷流路1 7內的稀釋海水之 高度（深度）會在流路寬度Wh之方向均一化。因此’從橫 斷流路1 7 A匯流至排海水中的稀釋海水量由於在流路寬度 Wh之方向均一化，所以即使縮短混合距離L亦可高效率 地混合並使流動全體形成大致均一的性狀。另外，圖示雖 然省略，但是有關第2堰15，亦可爲組合上述第2實施形態 -17- 200902140 及其變化例的結構。 <第4實施形態> 其次，就本發明之流體的混合流路構造，根據第1 〇圖 說明第4實施形態。另外’在與上述實施形態相同的部分 附記相同的元件符號’並省略其詳細說明。 本實施形態的混合流路10C ’係廢除第1堰14而只設置 有第2堰1 5。亦即，流動於排放水路1 1的排海水之底面部 的流動，係受限於第2堰1 5。該種結構’係只要使用較少 的堰即可完成而可減低建設成本’而且’亦可縮短混合距 離L。另外，雖然圖示已省略，但是有關第2堰15，亦可 爲組合上述第2實施形態及其變化例的結構。 又，雖然圖示已省略，但是作爲本實施形態的變化例 ，亦可將堰只設置在導水路1 2之上游側。在該變化例的情 況，只設置有上述第1堰14，而並未使用上述第2堰15。 <第5實施形態> 其次，就本發明之流體的混合流路構造’根據第1 1圖 及第1 2圖說明第5實施形態。另外，在與上述實施形態相 同的部分附記相同的元件符號’並省略其詳細說明。 本實施形態的混合流路1 〇D，係採用導水管1 2A ’取 代上述第1實施形態的導水路1 2。亦即，從開放水路之導 水路1 2，變更爲由配管所構成的導水管1 2 A。 依據該種結構，則藉由排放水路1 1、與匯流至排放水 -18- 200902140 路1 1之側面的導水管1 2 A之位置關係’即使沒有設置如第 3堰1 6的潛堰，亦可使稀釋海水容易地匯流至排海水之水 中。亦即，流出少流量的稀釋海水之導水管1 2 A由於可使 用比較小徑的管，所以只要將下端部設定於與排放水路1 1 之底面lib大致相同的位置，並且導水管12A之上端部成 爲比排海水之水面WL還低’連結於排放水路1 1之流路側 面1 1 a而使匯流即可。 另外，有關藉由第1堰14及第2堰15所形成的橫斷流路 1 7之作用效果，係與上述導水路1 2之情況相同。 又，有關導水管12A開口的高度h、與第1堰14及第2 堰1 5 A的高度Η之關係，爲了要獲得良好的混合效率’較 佳爲設定成與上述實施形態相同（h S Η)。 另外，使用上述導水路1 2 A的混合流路’雖然圖示已 省略，但是可爲上述各實施形態之組合’可分別獲得相同 的作用效果。 <第6實施形態> 其次，就本發明之流體的混合流路構造’根據第1 3圖 及第1 4圖說明第6實施形態。另外’在與上述實施形態相 同的部分附記相同的元件符號’並省略其詳細說明。 本實施形態中，係在上述的平面部2 0之水流表面形成 凹凸3 0。第1 3圖及第1 4圖所示的凹凸3 0 ’係與排海水或混 合海水之流動交叉成大致直角’並從與流動相接的水流表 面以等間距凸設複數個呈直線狀的薄板。 -19- 200902140 形成有該種凹凸30的平面部20，由於係在排海水或混 合海水之流動上產生漩渦等而於流動中發生紊流，所以可 更加促進排海水與稀釋海水之混合。因而，於平面部20設 置凹凸30，對於縮短混合距離L很有效。另外，該種的凹 凸3 0，設置於作爲平面部2 0之變化例所說明的平面部2 0 A 、2 OB、20C的情況當然亦可獲得相同的作用效果，更且 ，有關比較厚度較薄的混泥土製之第1堰14及第2堰15，只 要形成於上端面即可擾亂流動而提高混合效率。 而且，有關上述的凹凸30可爲各種的變化例，將其一 部分顯示於第1 5圖至第1 7圖中加以說明。 第1 5圖所示的第1變化例中，在直線上以斷斷續續方 式配置的凹凸3 1係朝流動方向以預定的間距設置有複數排 。該情況的凹凸3 1，係各個突設薄板所成，各凹凸3 1係配 置成千鳥狀。 第1 6圖及第1 7圖所示的第2變化例中，形成鋸齒折線 狀的凹凸32係朝流動方向以預定的間距設置有複數排。該 情況的凹凸3 2，係如第1 7圖所示的剖面圖，例如將薄板予 以折彎而固設於平面部20之表面所成者。又，例如第1 8圖 U)及（b)所示的第3變化例，亦可將薄板折彎成鱗狀而得的 凹凸33A、33B取代該種凹凸32來固設於平面20之表面。 即使採用該種從第1變化例至第3變化例所示的凹凸3 1 、3 2、3 3 A、3 3 B，由於亦會在排海水或混合海水之流動 上產生漩渦等而於流動中發生紊流，所以可更加促進排海 水與稀釋海水之混合。 -20- 200902140 上述的各實施形態之混合流路構造，係可提供以下流 體的混合方法，亦即在使流動於導水路1 2或導水管1 2 A的 稀釋海水從流路側面匯流至流動於排放水路1 1之排海水中 並將稀釋後的混合海水予以排放的情況，藉由使稀釋海水 匯流至排海水之水中，並且利用稀釋海水與排海水之匯流 部，來限制排海水沿著排放水路11之流動方向F而流動的 流路底面部側之流動，即可減低從流路側面匯流後的稀釋 海水受到排海水之流動的影響，且可使流入於排放水路11 的稀釋海水容易地到達流路寬度Wh方向之相反側側壁。 然後，依據上述本發明之流體的混合流路構造及混合 方法，例如將混合有從脫硫塔排出的排海水與稀釋海水的 混合海水排放至海域中的情況般，可縮短雙流體之混合所 必要的混合距離L，且可進行高效率的混合作業。一旦如 此地可達成混合距離L之縮短，則如排放水路1 1或導水路 12，在需要流體混合用之流路構造的工廠設備建設中便可 減低地基或建設費，尤其是，由於可縮短成爲匯流位置1 3 之下游側的排放水路1 1，所以可增加設計的自由度。 而且，上述的各實施形態中，雖然已說明作爲在從排 煙脫硫裝置之脫硫塔排出的多量排放海水（排海水）中混合 新的稀釋海水而予以稀釋用的混合流路構造，但是本發明 並非被限定於此，當然亦可適用作爲高效率地混合其他的 雙流體並形成大致均一的性狀或濃度之混合流體的混合流 路構造及混合方法。 另外，本發明並非被限定於上述的實施形態，只要在 -21 - 200902140 未脫離本發明之要旨的範圍內仍可做適當變更。 【圖式簡單說明】 第1圖係顯示流體的混合流路構造作爲本發明第1實施 形態的立體圖。 第2圖係第1圖之a-A剖面圖。 第3圖係第1圖之平面圖。 第4圖係顯示流體的混合流路構造作爲本發明第丨實施 形態的平面圖。 第5圖係第4圖之A - A剖面圖。 第6圖係顯示第4圖所示之平面部的第1變化例之剖面 圖。 第7圖係顯示第4圖所示之平面部的第2變化例之剖面 圖。 第8圖係顯示第4圖所示之平面部的第3變化例之剖面 圖。 第9圖係顯示流體的混合流路構造作爲本發明第3實施 形態的平面圖。 第1 〇圖係顯示流體的混合流路構造作爲本發明第4實 施形態的平面圖。 第1 1圖係顯示流體的混合流路構造作爲本發明第5實 施形態的平面圖。 第12圖係第11圖之C_C剖面圖。 第1 3圖係顯示設置有凹凸的平面部作爲本發明第6實 -22- 200902140 施形態的平面圖。 第14圖係第13圖之C-C剖面圖。 第15圖係顯示第13圖所示之凹凸的第1變化例之平面 圖。 第16圖係顯示第13圖所示之凹凸的第2變化例之平面 圖 第17圖係第16圖之E-E剖面圖。 鱗狀凹凸作爲第1 3 路·的流體的混合流 的痕合流路構造作 合流路構造之平面 第18圖（a)及（b)係顯示不同方向之 圖所示之凹凸的第3變化例之平面圖。 第1 9圖係顯示具備開放水路之導水 路構造作爲習知例的立體圖。 第20圖係第19圖之側面圖。 第2 1圖係顯示具備有導水管的流體 爲另一習知例的立體圖。 第2 2圖係第1 9圖及第2 1圖所示的混BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mixed flow path structure and a mixing method for, for example, highly efficient mixing of a seawater of a seawater desulfurization apparatus and a fluid of a diluted seawater. [Prior Art] Conventionally, the seawater discharged from the desulfurization tower is subjected to an operation for discharging into the sea after aeration, as an environmental countermeasure. However, before the discharge to the sea area, the characteristics of the discharged seawater (water discharge) (PH, DO, COD, etc.) are adjusted as needed, so there is a case where fresh diluted seawater is mixed. As a mixed flow path structure in which such a seawater and a diluted seawater are mixed, it is known that a water passage for discharging the discharge water passage out of the discharged seawater and a water conduit or a water conduit which flows out of the diluted seawater is mixed. In addition, when the seawater of the desulfurization tower is diluted and discharged, since the amount of the seawater to be treated is generally large, the discharge waterway having a larger cross-sectional area with the flow path can be used to make the cross-sectional area of the flow path smaller. A mixed flow path structure in which a water conduit or a water conduit merges. Here, the mixing flow path structure using the above-described water mixing method will be briefly explained based on Figs. 19 to 22 . The mixed flow path structure shown in Fig. 19 and Fig. 20 is formed such that the discharge water passage 1 through which the discharged seawater flows out and the water conduit 2 through which the diluted seawater flows out are converged in a T-shape so as to be orthogonal to the substantially same water surface WL. Then, as shown in Fig. 22, the discharge water path 1 is provided with a mixing distance L necessary for the confluence position 3 - 5 - 200902140 where the flow is converged with the water conduit 2 . The mixing distance L is a flow path length of the discharge water passage 1 necessary for mixing the seawater and the diluted seawater after the flow by the flow, and forming the mixed seawater diluted to a substantially uniform concentration of a predetermined value or less. Therefore, the discharged seawater flowing through the discharge water passage 1 is mixed seawater which is substantially uniformly mixed with the diluted seawater between the mixing distances L and is discharged into the sea area. Further, in the mixed flow path structure shown in Fig. 21, the water conduit 4 is used instead of the water conduit 2. The water conduit 4 is converged into a T-shape at a position lower than the water surface of the discharged seawater flowing through the discharge water passage 1, and is substantially uniform with the diluted seawater between the mixing distances L disposed downstream of the confluent position 3. The mixed seawater after mixing is discharged into the sea. Further, a technique for a mixed flow path structure which can shorten the mixing distance L necessary for mixing the diluted seawater to be a substantially uniformly diluted seawater mixture when the seawater discharged from the desulfurization tower is discharged to the sea area is not found. literature. SUMMARY OF THE INVENTION (Problems to be Solved by the Invention) However, the mixed flow path structure using the above-described conventional waterway mixing method is such that the diluted seawater flows into the discharge water path 1 from the side of the water passage and is mixed, so that the substantially uniform is completed. A long mixing distance L is required before the mixing operation of the mixed seawater. This can be seen as the divergence of seawater flowing from the side due to the flow of the discharged seawater, so that the dilute seawater in the discharge waterway 1 is greatly affected by the flow of the discharged seawater, thus diluting the seawater in the discharge water 200902140 The road width direction 'cannot easily reach (transverse) the opposite side of the inflowing side wall. Then, in order to set the discharge water path 1 having the above-described mixing distance L, a large foundation and a large construction cost are required. Therefore, when discharging the seawater discharged from the desulfurization tower to the sea area, it is a great obstacle to dilute the discharge into the mixed seawater meeting the predetermined environmental standard, and the problem of land use increase or construction cost increase. Further, the above-described mixing distance L varies depending on conditions such as the flow rate of the discharged seawater and the diluted seawater, or the shape of the water passage. The present invention has been made in view of the above circumstances, and an object thereof is to provide a mixing flow path structure and a mixing method of a fluid capable of reducing the mixing distance L necessary for mixing of two fluids and performing high-efficiency mixing. (Means for Solving the Problem) In order to solve the above problems, the present invention employs the following means. The mixing flow path structure of the fluid according to the first aspect of the present invention is a fluid in which the dilution fluid flowing in the second flow path is merged into the diluted fluid flowing in the first flow path and the diluted mixed fluid is discharged. The mixed flow path structure is characterized in that the second flow path is merged from the flow path side surface to the water of the diluted fluid flowing in the first flow path, and the second flow path and the first flow path are A weir is disposed in the water in the confluence portion to restrict the flow of the diluted fluid flowing in the bottom surface portion of the flow path. According to the mixed flow path structure of the fluid, the second flow path is merged from the flow path side surface into the water of the diluted fluid flowing in the first flow path, and the second flow path and the first flow path are connected to each other. The water is set to "limit" the flow of the diluted fluid flowing in the flow direction of the flow path by the 200902140, so that the dilution fluid that is converged from the side of the flow path can be reduced by the flow of the diluted fluid, and can flow into the first The dilution fluid in the flow path easily reaches the side wall opposite to the flow path width direction. In this case, the crucible provided in the water in the confluent portion of the second flow path and the first flow path may be provided at least in the vicinity of the downstream side of the flow path width of the second flow path, but is preferably provided in the first place. 2 Both sides of the upstream side and the downstream side of the flow path width of the flow path. Further, in this case, it is preferable to provide the same or higher position than the position where the flow of the dilution fluid flowing through the second flow path is merged. Further, the means for causing the dilution fluid to flow from the flow path side surface to the water of the diluted fluid may be a so-called latent weir or a water conduit. The mixed flow path structure of the fluid according to the second aspect of the present invention is a fluid that causes the diluted fluid flowing in the second flow path to flow into the diluted fluid flowing in the first flow path and discharges the diluted mixed fluid. The mixed flow path structure is characterized in that the second flow path is merged from the side surface of the flow path to the water flowing in the diluted fluid flowing in the first flow path, and the first flow after the second flow path is merged The manifold portion of the flow path is provided at a position higher than the flow path width of the second flow path from the upstream side and the downstream side of the flow path width of the second flow path, and is higher than the flow path width of the second flow path. . According to the mixed flow path structure of the fluid, the first flow path is formed by converging the second flow path from the flow path side to the water of the diluted fluid flowing in the first flow path and converging the second flow path. The confluence portion has a width higher than the flow path height of the second flow path from the water position 'on the upstream side and the downstream side of the flow path width of the second flow path and the flow path 200902140. The dilution fluid that flows from the side of the flow path of the first flow path to the water of the diluted fluid is affected by the flow of the diluted fluid, so that the dilution fluid flowing into the first flow path can easily reach the flow path width direction. Opposite side wall. Further, as means for causing the dilution fluid to flow from the side of the flow path to the water of the liquid to be diluted, a so-called latent weir or a water conduit may be used. In the mixed flow path structure of the fluid of the first aspect or the second aspect, it is preferable that a flat portion extending in the flow direction of the flow path is formed at the upper end portion of the downstream side of the crucible. The shallower water depth can form an area that narrows the cross-sectional area of the flow path. In this region, since the diluted fluid and the dilution fluid after the confluence merge and increase the flow rate, the mixing and diffusion of the two fluids can be promoted. Further, the flat portion in this case may be on only one of the downstream side, the upstream side, or the downstream side and the upstream side of the crucible. Preferably, irregularities are formed on the surface of the water flow of the flat portion, whereby the flow can be turbulent by the unevenness to promote mixing. In the above-described mixed flow path structure of any of the fluids, it is preferable that the upstream side of the flow path width of the second flow path is in the flow path width direction of the first flow path. The flow path wall side starting point after the second flow path is merged toward the opposite flow path wall side end point, and is inclined toward the downstream side in the flow direction of the diluted fluid, whereby the flow path width direction of the first flow path can be made The dilution fluid is uniformly distributed and mixed in the diluted fluid. A method of mixing a fluid according to a third aspect of the present invention is a method in which a dilution fluid flowing in a second flow path is merged into a fluid flowing in a diluted fluid flowing through a first flow path, and a diluted mixed fluid is discharged. The mixing method is characterized in that: the dilution fluid is condensed from the side of the flow path to the water of the diluted fluid, and the diluted fluid and the portion of the diluted fluid are used to restrict the diluted fluid along the foregoing The flow of the flow path bottom surface side in the flow direction of the flow path. According to the mixing method of the fluid, in the method of mixing the fluid flowing in the second flow path to the fluid to be diluted in the first flow path and discharging the diluted mixed fluid' The flow of the bottom surface side of the flow path in which the diluted fluid flows in the flow direction of the first flow path is restricted by the flow of the dilution fluid from the side of the flow path to the water of the diluted fluid and the confluent portion of the diluted fluid and the diluted fluid. Therefore, the dilution fluid that has flowed from the side of the flow path can be reduced by the flow of the diluted fluid, and the dilution fluid flowing into the first flow path can easily reach the side wall opposite to the flow path width direction. (Effect of the Invention) According to the present invention described above, it is possible to provide a method of discharging mixed seawater obtained by mixing the discharged seawater discharged from the desulfurization tower with the diluted seawater in the sea, which is necessary for reducing the mixing of the two fluids. The mixing path L and the mixing flow path structure and mixing method of the highly efficient mixed fluid. Therefore, the "mixing flow path and mixing method of the present invention which can shorten the mixing distance L" can obtain a foundation or construction fee necessary for reducing the construction of a plant including a flow path structure for fluid mixing, and can increase the degree of design freedom. . -10-200902140 [Embodiment] Hereinafter, an embodiment of a mixing flow path structure and a mixing method of a fluid according to the present invention will be described based on the drawings. <First Embodiment> The mixing channel 1 第 shown in Figs. 1 to 3 is used, for example, by mixing new diluted seawater with a desulfurization tower discharged from a flue gas desulfurization apparatus. In a large amount of discharged seawater (drainage water), it is treated as a mixed seawater to be discharged into the sea as a method of discharging seawater in accordance with environmental standards. In other words, the illustrated mixing channel 1 具备 is provided with a discharge water passage (first flow path) 11 through which the seawater (diluted fluid) flows out, and a water conduit (second flow path) through which the diluted seawater (dilution fluid) flows out. 12. The two water passages 1 1 and 12 are such that one of the water conduits 12 is orthogonal to the other of the discharge water passages 11 and merges into the T-shaped side of the flow passage side surface 1 1 a of the flow path. In other words, the mixing flow path 10 forms a water conduit 12 that has a smaller flow path cross-sectional area in order to flow out a relatively small amount of diluted seawater, and has a larger flow passage cross-sectional area with respect to a large amount of discharged seawater. The side of the flow path of the water channel 1 1 is 1 1 a, and the confluence is a T-shaped structure. Further, the discharge water passage 11 and the water conduit 12 in the present embodiment are both open water passages having a rectangular cross-sectional shape, and the water surface WL of the seawater and the diluted seawater are in the same degree. At the confluence point 13 where the discharge water path 11 and the water conduit 12 are converged, in order to restrict the flow of the bottom surface portion of the flow path of the discharge water passage 1 (the hollow arrow F in the figure), The flow direction of the seawater is -11 - 200902140. On the swim side, the first 堰1 4 and the second 堰1 5 are arranged in the confluence water. In this case, the first 堰14 and the second 堰15 are arranged in parallel at intervals substantially coincident with the flow path width Wd of the water conduit 12, and cross the flow path width Wh of the discharge water passage 11 to flow with the seawater discharged. The direction is set in an orthogonal manner. In other words, the first side 14 and the second side 15 are opposed to each other at a position where the pair of right and left side walls 1 2a forming the water conduit 12 are extended, and are vertically erected from the water passage bottom surface 1 1 b to form The wall surface flowing from the bottom surface lib of the water passage of the discharge water path 11 to the bottom surface of the height Η is restricted. In the first aspect and the second aspect, the wall surface having a strength sufficient to withstand the water pressure can be formed. Therefore, in the present embodiment, for example, a wall surface made of a thin concrete can be used. However, the first one is not limited to the concrete system, and for example, a steel structure or a steel plate may be used. On the other hand, in the water conduit 12, in order to cause the diluted seawater to flow from the flow path side surface 1 1 a to the drain water in the discharge water passage 1 1 , that is, the water flowing through the drain water in the discharge water passage 1 1 , in the water conduit The exit 1 2b of 1 2 is set to have the third 堰16. The third paragraph 16 is generally referred to as a latent weir to restrict the flow of the upper portion of the water conduit 12, and the bottom portion side is opened to form a flow path for diluting seawater. In the third aspect of this case, the sputum provided so as to form a flow of the diluted seawater from the bottom surface of the flow path to the height h is set to be at a height h from the bottom surface 1 1 b of the flow path. It is lower than the water surface WL. In addition, the hollow arrow f in the figure shows the flow direction of the diluted seawater. Further, the flow path height h of the diluted seawater formed by the third point 16 is -12-200902140 which is the same as or lower than the height Η of the first 堰14 and the second 堰I5 described above (h$H). Set by mode. Therefore, since the first 堰14 and the second 堰15 have a lower twist Η than the water surface WL, the diluted seawater that has flowed from the water conduit 12 through the opening of the height h is inevitably converged into the water discharged from the seawater. In this way, the above-described mixing flow path 10' is directed to the water flowing into the seawater flowing through the discharge flow path 1 1 so that the outlet opening of the diluted seawater opened from the side surface 1 1 a of the flow path 1 1 is restricted to the height h. The water conduit 12 is merged and the first flow portion 1 3 ' of the discharge flow path 1 1 after the dilution of the seawater is provided is provided with a first 堰 14 and a 2堰1 5, so the dilute seawater that flows to the discharge flow path 1 will pass through the cross-flow path formed between the first to fourth and the second to the fifth, and the flow of the discharged seawater can be reduced. In the affected state, 'the flow path 11 across the flow path width Wh flows toward the side wall 11 c on the opposite side. In other words, the transverse flow path 17 formed by the first 堰1 4 and the second 堰1 5 of the height 由于 is provided in the flow path width Wh ' throughout the height, so that the height from the outlet opening depends on the third 堰 16 The dilute seawater, which is confined to the water channel 12 of h, flows to the flow (water) of the seawater, and the main stream passes through the cross-flow path that restricts the flow by the first and fourth passages. And can easily reach the side (side wall) of the opposite side of the flow path 1 1 c ° Then, the molten seawater flowing through the cross-cut flow path 17 is limited by the first 堰 14 and the second 堰 15 to limit the flow path bottom surface In the case of the flow of the lb side, the flow of the seawater flowing upward in the state in which the flow rate is increased in accordance with the decrease in the cross-sectional area of the flow path is converged upward in the direction of the flow path width Wh, so that it will flow in order. A turbulent flow occurs and the mixing is performed efficiently. -13- 200902140 Therefore, in the flow path width wh direction of the discharge flow path, since the diluted seawater will be substantially uniformly merged into the seawater flowing in the discharge flow path 1 1 and mixed, the drainage of the seawater and the diluted seawater can be shortened. The mixing distance L necessary for the entire flow to be a substantially uniform trait. Further, regarding the relationship between the height Η of the first 堰14 and the second 堰15 and the height h of the outlet opening, 'the diluted seawater converges to the water lower than the height 横 of the traverse flow path 17,' The height h is set to be lower than the height 堰 of the crucible, and the more difficult it is to be affected by the flow of the seawater, it is preferable. However, even if the height h of the confluent seawater is higher than the height 横 of the transverse flow path 177, the mixing distance L is somewhat extended, but if it is formed by the first 堰14 and the second 堰15, In the transverse flow path 17, the flow can be restricted by the bottom surface portion of the seawater discharge. Therefore, the mixing distance L° can be further reduced than in the case where the flow path 17 is not completely cut. Second Embodiment> Next, The second embodiment will be described with reference to Figs. 4 and 5 in the mixed flow path structure of the fluid of the present invention. The same components as those of the above-described embodiment are denoted by the same reference numerals, and their detailed description is omitted. Further, in the above-described embodiment, the first 堰14 and the second 堰15 are formed into a thin wall surface made of a concrete, but the mixing channel 1 〇A of the present embodiment is formed at the upper end portion. The second weir 15A having the flat portion 20 extending in the flow direction F of the flow path is a weir disposed on the downstream side in the flow direction of the drain water. In other words, the second 堰 15 A is a columnar member in which the flat portion 20 is formed in the flow direction of the seawater, and the flat portion 20 is the width (thickness) necessary for the strength -14 - 200902140. It has a sufficiently large length α. Further, in the second aspect of this case, for example, a concrete or a steel structure can be used. When the second type 15A of this type is used, the discharge water path 11 having a narrow flow path cross-sectional area is formed over the length α of the flat portion 20 below the transverse flow path 17. Therefore, the mixed seawater flowing in the flat portion 20 increases the flow rate of the diluted seawater which is converged from the transverse flow path 17 except for the seawater discharge, so the flow velocity of the mixed seawater increases and also increases. Flowing turbulence. Therefore, in the area of the plane portion 20, it flows in the discharge water path! } The seawater discharged from the seawater and the dilute seawater that has flowed from the cross-flow channel 17 are mixed and diffused, so that it can be efficiently mixed with high efficiency, and the flow can be formed into a substantially uniform trait even at a shorter mixing distance L. . Next, a variation of the above-described planar portion 20 will be described with reference to Figs. 6 to 8 . The same components as those of the above-described embodiment are denoted by the same reference numerals, and their detailed description is omitted. The flat portion 20A of the first modification shown in Fig. 6 is formed on the upper end surface of the plate-like member 2 1 which is attached to the upper end of the second crucible 1 shown in the first embodiment. In this case, the plate-like member 21 is attached in an L shape from the upper end of the second weir 15 toward the downstream side of the flow path flow direction F, so that substantially the same as the second weave 15A of the second embodiment described above can be obtained. Effect. In other words, the portion in which the surface which does not contribute to the flow is removed from the columnar second 堰 15 A shown in the second embodiment is removed. The plane portion 2〇B' of the second modification shown in Fig. 7 is different from the plate-shaped member 2 1 of the first modification attached to the downstream side' by the second -15 1 - 15 - 200902140 The end is formed by mounting the upper end surface of the plate-like member 2 2 toward the upstream side. According to the configuration of the species, since the width of the flow path from the cross flow path 17 to the seawater discharge is narrowed to /3, the dilution seawater confluent to the seawater discharge can be in the flow path width Hz of the discharge water path π. The direction is more uniform. In the same manner as in the second embodiment and the first modification, in the region of the flat portion 20B, the seawater flowing through the discharge water passage 1 and the diluted seawater which is converged from the transverse flow passage 17 will be When it is mixed and diffused, it can be efficiently mixed, and even in a shorter mixing distance L, the entire flow can be formed into a substantially uniform property. The flat portion 20C of the third modified example shown in Fig. 8 is obtained by combining the first modified example and the second modified example, and is attached to the plate member 21 on the downstream side and the plate attached to the upstream side. The upper end surface of the member 22 is formed. Further, the plate-like members 2, 22 in this case may be one of different individuals or one body. According to this configuration, since the width of the flow path converging from the transverse flow path 17 to the discharged seawater is narrowed to S; so, the dilution seawater confluent to the discharged seawater can be in the flow path width of the discharge water path 1 1 The W h direction is more uniform, and in the region of the plane portion 20C, the seawater flowing from the discharge water passage 11 and the diluted seawater which is converged from the transverse flow passage 17 are mixed and diffused. The mixing can be carried out efficiently and efficiently, and even at a shorter mixing distance L, the flow can be formed into a substantially uniform property. <Third Embodiment> Next, a third embodiment of the mixed flow path structure of the fluid of the present invention will be described with reference to Figs. 9 to 16 to 200902140. The same components as those of the above-described embodiment are denoted by the same reference numerals, and their detailed description is omitted. Further, in the above-described embodiment, the first 堰1 4 and the second 堰15 A are disposed in parallel, but the mixed water passage 1 〇B of the present embodiment is made in the flow direction F of the flow path of the discharge water passage 1 1 . The first 堰1 4 A disposed on the upstream side is inclined. Specifically, the first 堰1 4A disposed on the upstream side of the flow path width Wd of the water conduit 12 is in the flow path wall side in which the water conduit 12 is converged in the flow path width Wh direction of the discharge water channel 1 1 . The starting point s is inclined toward the downstream end side of the flow path side of the discharge water. In other words, the first channel 14A is connected to the channel wall side starting point s of the channel side surface 1 1 a where the water conduit 12 is converged, and is connected to the channel wall side of the channel side surface 1 1 c. Since the end point E is also inclined to the upstream side, the cross-sectional area of the flow path of the transverse flow path 17 7 formed at the confluent position 1 3 A gradually decreases as it exits the side wall surface of the water guide side 12 . By forming the transverse flow path 1 7 A of this kind, the distribution of the diluted seawater flowing through the transverse flow path 1 7 A is uniformized in the direction of the flow path width Wh. In other words, the plane-view flow path width Wf of the cross-cut flow path 17A is narrowed in the flow path end point E which is converged in the drainage water in the middle of the flow path and is closer to the flow rate reduction, so that it flows in the transverse flow path. The height (depth) of the diluted seawater in 1 7 is uniformized in the direction of the flow path width Wh. Therefore, the amount of the diluted seawater that flows from the transverse flow path 17A to the discharge seawater is uniformized in the direction of the flow path width Wh, so that even if the mixing distance L is shortened, the flow can be efficiently mixed and the flow can be formed to be substantially uniform. Traits. Further, although the illustration is omitted, the second aspect 15 may be a combination of the above-described second embodiment -17-200902140 and its modification. <Fourth Embodiment> Next, a fourth embodiment will be described based on the first schematic diagram of the fluid flow path structure of the fluid of the present invention. The same components as those of the above-described embodiment are denoted by the same reference numerals, and their detailed description is omitted. In the mixing channel 10C' of the present embodiment, the first port 14 is abolished and only the second port 15 is provided. That is, the flow of the bottom surface portion of the discharged seawater flowing through the discharge water passage 11 is limited to the second 堰15. This type of structure can be completed by using less hydrazine and can reduce the construction cost 'and' can also shorten the mixing distance L. Further, although the illustration has been omitted, the second aspect 15 may be a combination of the above-described second embodiment and its modifications. Further, although the illustration has been omitted, as a modification of the embodiment, the crucible may be provided only on the upstream side of the water conduit 12. In the case of this modification, only the first 堰14 described above is provided, and the second 堰15 is not used. <Fifth Embodiment> Next, the fifth embodiment will be described based on the first and second figures of the fluid flow path structure of the present invention. The same components as those in the above-described embodiment are denoted by the same reference numerals, and the detailed description thereof will be omitted. In the mixing flow path 1 〇D of the present embodiment, the water conduit 1 2A' is used instead of the water conduit 1 2 of the first embodiment. That is, the water conduit 12 from the open waterway is changed to the water conduit 1 2 A composed of the piping. According to this configuration, the positional relationship between the water discharge pipe 1 1 and the water conduit 1 2 A converging to the side of the discharge water -18-200902140 road 1 1 is even if the sneak as in the third 堰 16 is not provided. The diluted seawater can also be easily condensed into the water of the discharged seawater. That is, since the water conduit 1 2 A from which the flow of the diluted seawater flows out can be used, the lower end portion can be set at substantially the same position as the bottom surface lib of the discharge water passage 1 1 and the upper end of the water conduit 12A. The portion is lower than the water surface WL of the seawater discharge, and the side surface of the flow path connected to the discharge water channel 11 is 1 1 a, and the flow can be made. Further, the effect of the transverse flow path 17 formed by the first 堰14 and the second 堰15 is the same as that of the above-described water conduit 12. Further, the relationship between the height h of the opening of the water conduit 12A and the height Η of the first 堰14 and the second 堰15 A is preferably set to be the same as in the above embodiment in order to obtain good mixing efficiency (h S Η). Further, the mixing flow path '' using the water conduit 1 2 A is omitted, but the combination of the above embodiments can achieve the same operational effects. <Sixth Embodiment> Next, the sixth embodiment will be described with reference to Figs. 3 and 14 in the mixed flow path structure of the fluid of the present invention. The same components as those of the above-described embodiment are denoted by the same reference numerals, and the detailed description thereof will be omitted. In the present embodiment, the unevenness 30 is formed on the surface of the water flow of the flat portion 20 described above. The concavity and convexity 3 0 ' shown in Fig. 1 and Fig. 14 intersects with the flow of the seawater or the mixed seawater at a substantially right angle' and protrudes from the surface of the water flow connected to the flow at equal intervals in a plurality of straight lines. sheet. -19- 200902140 The flat portion 20 in which the irregularities 30 are formed is turbulent in the flow due to the occurrence of vortexes in the flow of the seawater or the mixed seawater, so that the mixing of the seawater and the diluted seawater can be further promoted. Therefore, it is effective to reduce the mixing distance L by providing the unevenness 30 in the flat portion 20. In addition, it is a matter of course that the unevenness 30 of this kind is provided in the planar portions 20A, 2OB, and 20C described as a variation of the planar portion 20, and the same effect can be obtained. The first layer 14 and the second layer 15 made of a thin concrete can be disturbed by flow on the upper end surface to improve mixing efficiency. Further, the above-described unevenness 30 can be variously modified, and a part thereof will be described with reference to Figs. 15 to 17. In the first modification shown in Fig. 5, the concavities and convexities 3 1 arranged in a straight line on a straight line are provided with a plurality of rows at a predetermined pitch in the flow direction. In this case, the concavities and convexities 3 1 are formed by the respective protruding thin plates, and the respective concavities and convexities 3 1 are arranged in a thousand bird shape. In the second modification shown in Figs. 16 and 17, the irregularities 32 having the zigzag line shape are provided in a plurality of rows at a predetermined pitch in the flow direction. The unevenness 3 2 in this case is a cross-sectional view as shown in Fig. 17, for example, a thin plate is bent and fixed on the surface of the flat portion 20. Further, for example, in the third modification shown in Figs. 8(U) and (b), the irregularities 33A and 33B obtained by bending the thin plate into a scaly shape may be fixed to the surface of the flat surface 20 instead of the irregularities 32. . Even if the concavities and convexities 3 1 , 3 2 , 3 3 A, and 3 3 B shown in the first to third modifications are used, a vortex or the like is generated in the flow of the seawater or the mixed seawater. Turbulence occurs in the middle, so it can promote the mixing of seawater and diluted seawater. -20- 200902140 The mixed flow path structure of each of the above embodiments is capable of providing a method of mixing the following fluids, that is, diverging seawater flowing through the water conduit 12 or the water conduit 1 2 A from the side of the flow path to the flow In the case of discharging the diluted mixed seawater in the seawater discharged from the waterway 1 1 , the dilute seawater is restricted to flow along the water discharged into the seawater, and the confluence portion of the diluted seawater and the discharged seawater is used to restrict the drainage of the seawater along the seawater. The flow of the bottom surface side of the flow path which flows in the flow direction F of the discharge water passage 11 can reduce the influence of the flow of the seawater discharged from the side surface of the flow path by the discharge of the seawater, and can make the diluted seawater flowing into the discharge water passage 11 easy. The ground reaches the opposite side wall of the flow path width Wh direction. Then, according to the mixed flow path structure and the mixing method of the fluid of the present invention, for example, when the mixed seawater of the seawater discharged from the desulfurization tower and the diluted seawater is discharged into the sea, the mixing of the two fluids can be shortened. The necessary mixing distance L and high-efficiency mixing work can be performed. Once the shortening of the mixing distance L can be achieved in this way, for example, the discharge water path 11 or the water conduit 12 can reduce the foundation or construction cost in the construction of the plant equipment requiring the flow path structure for fluid mixing, in particular, because it can be shortened It becomes the discharge water path 1 1 on the downstream side of the confluence position 1 3, so the degree of freedom in design can be increased. In addition, in each of the above-described embodiments, a mixed flow path structure for diluting a large amount of discharged seawater (drainage water) discharged from a desulfurization tower of a flue gas desulfurization apparatus and diluting it is described. The present invention is not limited thereto, and it is of course also applicable to a mixed flow path structure and a mixing method which are a mixed fluid which efficiently mixes other two fluids and forms a substantially uniform property or concentration. In addition, the present invention is not limited to the above-described embodiments, and may be appropriately modified as long as it does not depart from the gist of the present invention in the range of -21 - 200902140. [Brief Description of the Drawings] Fig. 1 is a perspective view showing a mixed flow path structure of a fluid as a first embodiment of the present invention. Fig. 2 is a cross-sectional view taken along line a-A of Fig. 1. Figure 3 is a plan view of Figure 1. Fig. 4 is a plan view showing a mixed flow path structure of a fluid as a third embodiment of the present invention. Fig. 5 is a cross-sectional view taken along line A-A of Fig. 4. Fig. 6 is a cross-sectional view showing a first modification of the plane portion shown in Fig. 4. Fig. 7 is a cross-sectional view showing a second modification of the plane portion shown in Fig. 4. Fig. 8 is a cross-sectional view showing a third modification of the plane portion shown in Fig. 4. Fig. 9 is a plan view showing a mixed flow path structure of a fluid as a third embodiment of the present invention. Fig. 1 is a plan view showing a mixed flow path structure of a fluid as a fourth embodiment of the present invention. Fig. 1 is a plan view showing a mixed flow path structure of a fluid as a fifth embodiment of the present invention. Figure 12 is a cross-sectional view taken along line C_C of Figure 11. Fig. 13 is a plan view showing a flat portion provided with irregularities as a sixth embodiment of the present invention. Figure 14 is a cross-sectional view taken along line C-C of Figure 13. Fig. 15 is a plan view showing a first modification of the unevenness shown in Fig. 13. Fig. 16 is a plan view showing a second modification of the unevenness shown in Fig. 13. Fig. 17 is a sectional view taken along line E-E of Fig. 16. The squamous concavity and the concavity flow path of the mixed flow of the first three-way fluid are the planes of the combined flow path structure. Fig. 18 (a) and (b) show the third variation of the concavities and convexities shown in the different directions. Floor plan. Fig. 19 is a perspective view showing a structure of a water conduit having an open water path as a conventional example. Figure 20 is a side view of Figure 19. Fig. 2 is a perspective view showing a fluid having a water conduit as another conventional example. Figure 2 2 shows the mixture shown in Figure 19 and Figure 21
【主要元件符號說明】 10、10A〜10D ·混合水路 11 :排放水路（第1流路） 12 :導水路（第2流路） 12A :導水管（第2流路） 1 3 :匯流位置 14、14 A :第 1堰 -23- 200902140 15、 16 ： 17、 20、 30、 1 5 A :第2堰 第3堰 17A :橫斷流路 20A、20B、20C:平面部 31、32、33A、33B:凹凸 -24[Description of main component symbols] 10, 10A to 10D • Mixed water channel 11: Discharge waterway (first flow path) 12: Water conduit (second flow path) 12A: Water conduit (second flow path) 1 3 : Confluence position 14 , 14 A : 1堰-23- 200902140 15, 16 : 17, 20, 30, 1 5 A : 2nd, 3rd, 17A: Transverse flow paths 20A, 20B, 20C: Planar parts 31, 32, 33A , 33B: Bump-24