脫硫廢水處理方案

精選優(yōu)質(zhì)文檔-----傾情為你奉上/r/n精選優(yōu)質(zhì)文檔-----傾情為你奉上/r/n專心---專注---專業(yè)/r/n專心---專注---專業(yè)/r/n精選優(yōu)質(zhì)文檔-----傾情為你奉上/r/n專心---專注---專業(yè)/r/n脫硫廢水處理系統(tǒng)/r/n設/r/n計/r/n方/r/n案/r/n2011年12月7日/r/n

/r/n目錄/r/n/r/n/r/n/r/n概述/r/n1.1/r/n/r/n脫硫廢水質(zhì)資料/r/n脫硫廢水主要是鍋爐煙氣濕法脫硫（石灰石/石膏法）過程中為了維持脫硫裝置漿液循環(huán)系統(tǒng)物質(zhì)的平衡，防止煙氣中可溶部分即氯濃度超過規(guī)定值和保證石膏質(zhì)量，從吸收塔系統(tǒng)中排放的廢水。一般來自于石膏脫水和清洗系統(tǒng)，或是水力旋流器的溢流水及皮帶過濾機的濾液。/r/n呈弱酸性；懸浮物高；含鹽量高；含/r/nHg/r/n、P/r/nb/r/n等重金屬離子。脫硫廢水的超標項目主要為懸浮物，pH值，重金屬離子，氟化物等。/r/n一般/r/n脫硫/r/n廢水水質(zhì)/r/n表/r/n如下/r/n項目/r/n單位/r/n數(shù)據(jù)/r/nMCR工況下廢水流量/r/nm/r/n3/r/n/h/r/n12/r/nMCR工況下廢水質(zhì)量/r/nkg/h/r/n12120/r/n溫度/r/n℃/r/n50/r/nPH/r/n5~6/r/n含固量/r/n%/r/n1/r/nCaSO/r/n4/r/n.2H/r/n2/r/nO/r/nkg/h/r/n220/r/nCaSO/r/n3/r/n.1/2H/r/n2/r/nO/r/nkg/h/r/n6/r/nCa/r/nC/r/nO/r/n3/r/nkg/h/r/n18/r/nMg/r/nC/r/nO/r/n3/r/nkg/h/r/n0/r/nA/r/nSH/r/nkg/h/r/n78/r/nCl/r/n-/r/nmg/l/r/n20/r/n,/r/n000/r/n1/r/n./r/n2/r/n/r/n處理后達標排放水質(zhì)/r/n廢水處理后水質(zhì)排放達到國家污水綜合排放標準（GB8978－1996）一級標準要求。/r/n系統(tǒng)概況/r/n2.1脫硫廢水處理工藝/r/n /r/nFGD來脫硫廢水/r/n→/r/n混合反應器（2臺）/r/n→/r/n脫硫廢水池（1座）/r/n→/r/n脫硫廢水泵（2臺）/r/n→/r/npH調(diào)整槽/r/n→/r/n沉降槽/r/n→/r/n絮凝槽/r/n→/r/n澄清器（1臺）/r/n→/r/n清水池（1座）/r/n→/r/n清水泵（2臺）/r/n→/r/n達標排放/r/n2.2/r/n污泥處理工藝流程如下：/r/n澄清器（1臺）排泥/r/n→/r/n污泥輸送泵（2臺）/r/n→/r/n板框/r/n壓濾機/r/n（1臺）/r/n→/r/n泥餅外運/r/n系統(tǒng)出力本處理系統(tǒng)設計出力/r/n5-/r/n1/r/n0/r/nt/h。/r/n本系統(tǒng)按10t/h設計。/r/n系統(tǒng)連接與運行/r/n3/r/n.1/r/n/r/n脫硫廢水池/r/n從FGD工藝樓來的廢水，/r/n通過投加次氯酸鈉，在混合反應器中反應以降低/r/n廢水的COD/r/n（也可在澄清池出水中投加次氯酸鈉，而后在混合反應器中反應，具體由調(diào)試確定），/r/n混合反應器出水進入脫硫/r/n廢水/r/n池/r/n貯存/r/n（若采用澄清池出水氧化方式運行，則混合反應器出水進入清水池）。廢水池/r/n容積為150m/r/n3/r/n，通過/r/n廢水池/r/n的緩沖作用，使處理系統(tǒng)能以穩(wěn)定的流量運行。/r/n在廢水池中通入空氣進行曝氣，起到攪拌混合作用和降低廢水的COD。曝氣空氣由曝氣風機提供，曝氣風機數(shù)量2臺，1用1備。風機進出口設有消音器，以降低風機的噪音。2臺曝氣風機的運行、停運均由脫硫島DCS自動控制，也可就地啟停。/r/n廢水池頂設2臺脫硫廢水泵，1用1備，出力均為12～16m/r/n3/r/n/h，與廢水池液位信號連鎖。2臺廢水泵的運行、停運均由脫硫島DCS自動控制，也可就地啟停。/r/n3/r/n.2/r/n/r/n中和、沉降及絮凝/r/n廢水箱中的脫硫廢水通過廢水泵提升至三聯(lián)箱（pH調(diào)整槽、沉降槽、絮凝槽合稱為三聯(lián)箱）。在三聯(lián)箱中，通過加入石灰乳、凝聚劑、有機硫，完成pH調(diào)整、飽和硫酸鈣結(jié)晶析出、混凝反應等，同時從澄清器底部回流部分泥渣至pH調(diào)整槽，加快反應沉淀速度。/r/n在三聯(lián)箱出水中加入助凝劑，通過管道混合，使/r/n絮凝物變得更大、更容易沉/r/n淀/r/n，使其能在澄清器中沉淀，分離出來。/r/n3/r/n.3/r/n/r/n澄清器/r/n廢水從三聯(lián)箱自流進入澄清器，廢水中的絮凝物通過重力作用沉積在澄清器底部，濃縮成泥渣，由刮泥裝置清除，清水則上升至頂部通過環(huán)形三角溢流堰自流至清水/r/n池/r/n。/r/n澄清器旁設/r/n2臺/r/n污泥循環(huán)泵/r/n，1/r/n用/r/n1/r/n備/r/n，出力均為3.5m/r/n3/r/n/h，/r/n將濃縮泥渣一部分作為接觸泥渣持續(xù)返回至/r/npH調(diào)整/r/n槽，提供沉淀所需要的晶核。/r/n澄清器旁設/r/n2臺/r/n污泥輸送泵/r/n，A污泥輸送泵出力為7m/r/n3/r/n/h，B污泥輸送泵出力為50～/r/n0.1/r/nm/r/n3/r/n/h，/r/n當澄清器/r/n底部/r/n泥渣積累到一定高度時/r/n（也可由泥位計控制）/r/n，啟動污泥輸送泵，向壓濾機供料，進行污泥壓濾操作。/r/n3/r/n.4/r/n/r/n清水池/r/n澄清器/r/n出水自流進入清水池，容積為200m/r/n3/r/n。在清水池中通入空氣進行曝氣，起混合攪拌作用。在/r/n澄清器/r/n出水管上中，加入HCl調(diào)節(jié)清水pH值，/r/n使其/r/npH在6~9之間/r/n。如清水未達到排放標準，可/r/n返回至/r/npH調(diào)整槽/r/n，再進行處理。/r/n清水池頂設2臺清水泵，1用1備，出力均為16m/r/n3/r/n/h，與清水池液位信號連鎖。2臺清水泵及其出口母管電動閥門的運行、停運均由脫硫島DCS自動控制，也可就地啟停。/r/n3/r/n.5壓濾機及附屬設施/r/n澄清器/r/n底部/r/n泥渣/r/n通過/r/n污泥輸送泵/r/n送至壓濾機，由壓濾機完成泥渣壓濾，/r/n壓濾后的泥餅由汽車外運處置，濾液則返回/r/n脫硫廢水池/r/n。/r/n壓濾機可由脫硫島DCS自動控制，也可實現(xiàn)就地自動運行。/r/n加藥系統(tǒng)/r/n本處理系統(tǒng)加藥系統(tǒng)由石灰乳加藥裝置、凝聚劑加藥裝置、有機硫加藥裝置、助凝劑加藥裝置、鹽酸加藥裝置、次氯酸鈉加藥裝置組成。/r/n安裝在/r/n組合/r/n框架上的設備包括/r/n各/r/n溶液箱、計量泵、平臺扶梯及其所有的管路、管件、閥門等配件。/r/n(1)加藥裝置的布置/r/n在廢水處理車間一層澄清加藥區(qū)布置了石灰乳、凝聚劑、有機硫、助凝劑加藥裝置。石灰乳溶液箱、石灰乳計量泵布置在一個底盤上；凝聚劑溶液箱、凝聚劑計量箱、凝聚劑計量泵、助凝劑溶液箱、助凝劑計量泵、助凝劑計量箱、有機硫溶液箱、有機硫計量泵集中布置在一個底盤上。/r/n在低位藥品貯存區(qū)布置了鹽酸加藥裝置、次氯酸鈉加藥裝置，其中鹽酸計量泵、pH計清洗計量泵、次氯酸鈉計量泵布置在一個底盤上。/r/n(2)加藥量的控制/r/n石灰乳計量泵加藥量由調(diào)試確定，根據(jù)三聯(lián)箱pH計測定之pH值，由/r/n脫硫島/r/nDCS調(diào)整石灰乳計量泵頻率，使三聯(lián)箱pH值穩(wěn)定在9~9.5之間。/r/n助凝劑計量泵加藥量由調(diào)試確定，根據(jù)/r/n三聯(lián)箱進水電磁流量計/r/n測定之水量，由脫硫島DCS調(diào)整助凝劑計量泵頻率，實現(xiàn)流量比例加藥。/r/n凝聚劑/r/n計量泵加藥量由調(diào)試確定，根據(jù)三聯(lián)箱進水電磁流量計測定之水量，由/r/n脫硫島/r/nDCS調(diào)整/r/n凝聚劑/r/n計量泵頻率，實現(xiàn)流量比例加藥。/r/n有機硫計量泵加藥量由調(diào)試確定，根據(jù)三聯(lián)箱進水電磁流量計測定之水量，由/r/n脫硫島/r/nDCS通過計量泵附帶之脈沖轉(zhuǎn)換器，調(diào)整計量泵頻率，實現(xiàn)流量比例加藥。/r/n次氯酸鈉/r/n計量泵加藥量由調(diào)試確定，根據(jù)進水流量，由/r/n脫硫島/r/nDCS調(diào)整/r/n次氯酸鈉/r/n計量泵頻率，實現(xiàn)流量比例加藥。/r/n鹽酸加藥計量泵加藥量由調(diào)試確定，根據(jù)澄清器出水流通池/r/npH計/r/n測定之清水pH值，由/r/n脫硫島/r/nDCS通過計量泵附帶之脈沖轉(zhuǎn)換器，調(diào)整計量泵頻率，使清水箱/r/npH/r/n值穩(wěn)定在7~9之間。/r/n廢水排放系統(tǒng)/r/n /r/n壓濾機濾液、澄清器排泥、加藥裝置以及其他沖洗水等通過排水溝排至脫硫廢水池，進入廢水處理系統(tǒng)統(tǒng)一處理。室外低位藥品貯存區(qū)底設一臺排污泵，排污泵根據(jù)泵坑液位連鎖，自動起停，將貯存區(qū)污水排入脫硫廢水池內(nèi)。/r/n設備及構筑物布置/r/n本處理系統(tǒng)包括：廢水池、清水池、混合反應器、三聯(lián)箱、澄清器、壓濾機、各種加藥裝置等。/r/n混合反應器、脫硫廢水泵、清水泵、曝氣風機等布置在廢水、清水水池池頂；次氯酸鈉貯存箱、鹽酸貯存箱、次氯酸鈉加藥裝置、鹽酸加藥裝置、酸霧吸收器及安全淋浴器等布置在低位藥品貯存槽。/r/n三聯(lián)箱和壓濾機布置在廢水處理樓二層（+7.0）；石灰乳制備箱、石灰乳輸送泵、凝聚劑、助凝劑、有機硫加藥裝置、石灰乳加藥裝置、澄清器、污泥輸送泵、污泥循環(huán)泵、壓濾機清洗水貯罐、壓濾機清洗水泵等布置在廢水處理樓一層（0.0）泥餅收集倉吊在廢水處理樓一層壓濾機下方。/r/n主要設備及構筑物清冊/r/n序號/r/n名/r/n/r/n稱/r/n/r/n及/r/n/r/n項/r/n/r/n目/r/n單/r/n/r/n位/r/n數(shù)/r/n/r/n量/r/n數(shù)/r/n/r/n據(jù)/r/n備/r/n/r/n注/r/n1/r/n脫硫廢水池/r/n座/r/n1/r/n6000×/r/n100/r/n00×/r/n25/r/n00V/r/n＝15/r/n0m/r/n3/r/n鋼砼/r/n花崗巖或玻璃鋼防腐/r/n2/r/n混合反應器/r/n臺/r/n2/r/n鋼制內(nèi)襯膠/r/nΦ/r/n28/r/n00/r/nX2300/r/n/r/n/r/nV/r/n＝12/r/nm/r/n3/r/n攪拌機/r/nN=2.2kW/r/n3/r/npH/r/n調(diào)整槽/r/n臺/r/n1/r/n鋼制內(nèi)襯玻璃鋼/r/n2500×2500×2/r/n2/r/n00/r/n/r/nV/r/n＝/r/n1/r/n2/r/nm/r/n3/r/n攪拌器/r/nN=/r/n2.2/r/nkW/r/n4/r/n沉降槽/r/n臺/r/n1/r/n鋼制內(nèi)襯玻璃鋼/r/n2500×2500×2/r/n2/r/n00V/r/n＝/r/n1/r/n2/r/nm/r/n3/r/n攪拌器/r/nN=/r/n2.2/r/nkW/r/n5/r/n絮凝槽/r/n臺/r/n1/r/n鋼制內(nèi)襯玻璃鋼/r/n2500×2500×2/r/n2/r/n00V/r/n＝/r/n1/r/n2/r/nm/r/n3/r/n攪拌器/r/nN=1.1kW/r/n6/r/n澄清/濃縮器/r/n臺/r/n1/r/n鋼制內(nèi)襯玻璃鋼/r/nΦ/r/n7/r/n000H/r/n＝/r/n7000/r/n攪拌器/r/nN=0./r/n7/r/n5kW/r/n7/r/n清水池/r/n座/r/n1/r/n6000×/r/n40/r/n00×/r/n25/r/n00V/r/n＝6/r/n0m/r/n3/r/n鋼砼花崗巖或玻璃鋼防腐/r/n8/r/n石灰乳制備箱/r/n臺/r/n2/r/n鋼制/r/nΦ/r/n25/r/n00/r/nX2900/r/nV/r/n＝12/r/nm/r/n3/r/n攪拌器/r/nN=5.5kW/r/n9/r/n石灰乳輸送泵/r/n臺/r/n2/r/n型號：/r/n11/2/1B-AH/r/n出力/r/nm/r/n3/r/n/h/r/n正常/r/n/r/n9～11/r/n揚程/r/nMPa/r/n0.27～0.29/r/n電機功率/r/nkW/r/n4/r/n10/r/n石灰乳加藥裝置/r/n套/r/n1/r/n(1)/r/n石灰乳溶液箱/r/n臺/r/n1/r/n鋼制/r/nV/r/n＝5/r/nm/r/n3/r/n/r/nΦ/r/n20/r/n00/r/nX2500/r/n/r/n攪拌器:/r/nN=/r/n2/r/n./r/n2/r/nkW/r/n(2)/r/n石灰乳計量泵/r/n臺/r/n2/r/n出力/r/nQ=656L/h/r/n，P=0.35MpaN=0.75Kw/r/n型號：/r/nGB0700SP4MNN/r/n11/r/n凝聚劑加藥裝置/r/n套/r/n1/r/n(1)/r/n凝聚劑攪拌溶液箱/r/n臺/r/n1/r/n鋼制內(nèi)襯膠/r/nV/r/n＝2/r/nm/r/n3/r/n/r/nΦ1/r/n5/r/n00/r/nX2500/r/n/r/n攪拌器/r/nN=1./r/n1/r/nkW/r/n(2)/r/n凝聚劑計量箱/r/n臺/r/n1/r/nV=0.8m/r/n3/r/n/r/n/r/nΦ/r/n1000/r/n×/r/n1400鋼襯膠/r/n(3)/r/n凝聚劑計量泵/r/n臺/r/n2/r/n出力/r/n50L/h/r/n型號：/r/nGM0050PR1MNN/r/n12/r/n助凝劑加藥裝置/r/n套/r/n1/r/n(1)/r/n助凝劑溶液箱/r/n臺/r/n1/r/n鋼制內(nèi)襯膠/r/nV/r/n＝2/r/nm/r/n3/r/n/r/nΦ1/r/n5/r/n00/r/n攪拌器/r/nN=1./r/n1/r/nkW/r/n(2)/r/n助凝劑計量泵/r/n臺/r/n2/r/n出力/r/n50L/h/r/n型號：/r/nGM0050PR1MNN/r/n(3)/r/n脫水劑計量泵/r/n臺/r/n1/r/n出力17/r/n0L/h/r/n型號：/r/nGM0050PR1MNN/r/n13/r/n有機硫加藥裝置/r/n套/r/n1/r/n(1)/r/n有機硫貯存箱/r/n臺/r/n1/r/n鋼制內(nèi)襯膠/r/nV=0.5m/r/n3/r/n/r/nΦ1000/r/n(2)/r/n有機硫計量泵/r/n臺/r/n2/r/n出力3/r/n./r/n8/r/n/h/r/n型號：/r/nP756-398TI/r/n14/r/n鹽酸貯存箱/r/n臺/r/n1/r/n碳鋼襯膠/r/nΦ/r/n20/r/n00V/r/n＝5/r/nm/r/n3/r/n15/r/n鹽酸加藥裝置/r/n套/r/n1/r/n(1)/r/n鹽酸加藥計量泵/r/n臺/r/n2/r/n出力/r/nQ=7.6L/h/r/nP=0.35MpaN=22w/r/n型號：/r/nP766-368TI/r/n(2)/r/npH/r/n計清洗泵/r/n臺/r/n1/r/n出力/r/nQ=/r/n1.6/r/nL/h/r/nP=0.76MpaN=22w/r/n型號：/r/nP136-398TI/r/n16/r/n安全淋浴器/r/n臺/r/n1/r/n不銹鋼雙噴頭/r/n17/r/n酸霧吸收器/r/n臺/r/n1/r/nPVCDN350/r/n18/r/n次氯酸鈉貯存箱/r/n臺/r/n1/r/n碳鋼襯膠/r/nΦ/r/n20/r/n00V/r/n＝5/r/nm/r/n3/r/n19/r/n次氯酸鈉加藥裝置/r/n套/r/n1/r/n次氯酸鈉計量泵/r/n臺/r/n2/r/n出力/r/nQ=/r/n22/r/nL/h/r/nP=1.2MpaN=0.25Kw/r/n型號：/r/nGM0025PR1MNN/r/n20/r/n曝氣風機/r/n臺/r/n2/r/nJTS-80b/r/n出力/r/nm/r/n3/r/n//r/nmin/r/n正常/r/n4.26/r/n風壓/r/nkPa/r/n49/r/n電機功率/r/nkW/r/n7.5/r/n21/r/n脫硫廢水泵/r/n臺/r/n2/r/n型號：/r/nNM053BT01L06V/r/n出力/r/nm/r/n3/r/n/h/r/n正常/r/n12/r/n～/r/n1/r/n6/r/n揚程/r/nMPa/r/n0.30/r/n電機功率/r/nkW/r/n4/r/n22/r/n清水泵/r/n臺/r/n2/r/n型號：/r/nNM053BT01L06V/r/n出力/r/nm/r/n3/r/n/h/r/n1/r/n6/r/n揚程/r/nMPa/r/n0.50/r/n電機功率/r/nkW/r/n5.5/r/n23/r/n污泥循環(huán)泵/r/n臺/r/n2/r/n型號：/r/nNM038BY01L06B/r/n出力/r/nm/r/n3/r/n/h/r/n正常/r/n2.5/r/n～/r/n3.5/r/n揚程/r/nMPa/r/n0.30/r/n電機功率/r/nkW/r/n2.2/r/n24/r/nA污泥輸送泵/r/n臺/r/n1/r/n出力/r/nm/r/n3/r/n/h/r/n正常/r/n/r/n7/r/n揚程/r