南水北調(diào)山東受水區(qū)老舊管網(wǎng)水質(zhì)穩(wěn)定性控制的中試研究
發(fā)布時間：2018-12-29 21:22
【摘要】：本文以南水北調(diào)水作為主要實驗用水,在多水源供水條件下,研究濟寧和東營地區(qū)老舊管網(wǎng)鐵釋放的過程,研究的主要內(nèi)容如下:(1)對濟寧和東營兩地老舊管網(wǎng)管垢進行微觀形態(tài)分析和成分分析;(2)針對南水北調(diào)水質(zhì)特性,建立適合的水質(zhì)化學穩(wěn)定性判定體系,對南水北調(diào)水水質(zhì)化學穩(wěn)定性進行評估;(3)研究不同水質(zhì)條件(不同水源切換、氯離子、硫酸根)對濟寧和東營老舊管網(wǎng)鐵釋放的影響;(4)針對水源切換后,濟寧地區(qū)老舊管網(wǎng)出水鐵超標現(xiàn)象,開展多水源供水情況下鐵釋放控制性研究。本文的主要研究結(jié)果如下:1、通過管網(wǎng)管垢的電鏡掃描分析,元素能譜圖分析,物質(zhì)衍射分析,得出管垢主要成分為鐵的氧化物,東營地區(qū)管網(wǎng)管垢主要成分為Fe3O4(磁鐵礦)、α-Fe O(OH)(針鐵礦)和CaCO3(石灰石),而濟寧地區(qū)管垢檢測出較多的γ-FeO(OH)(纖鐵礦),究其原因,是由兩地不同水質(zhì)、水力條件導致。2、針對南水北調(diào)水質(zhì)特點,選取Langelier飽和指數(shù)、CCPP碳酸鈣沉淀勢以及拉森比率三個判定指數(shù),對水質(zhì)化學穩(wěn)定性進行綜合評價,水體為結(jié)垢性水質(zhì),拉森比率較高,管網(wǎng)應對南水北調(diào)水切換時,容易發(fā)生“黃水”現(xiàn)象。3、濟寧和東營地區(qū)老舊管網(wǎng)鐵釋放受進水硫酸根和氯離子濃度的影響較大,隨著進水硫酸根離子濃度和氯離子濃度增大,管網(wǎng)鐵釋放不斷增大;通過對南水北調(diào)水進行水源切換,運行至出水穩(wěn)定時,東營地區(qū)管網(wǎng)出水總鐵量0.27 mg/L,濁度0.87 NTU,滿足生活飲用水衛(wèi)生標準限值,濟寧地區(qū)管網(wǎng)出水總鐵為0.45 mg/L,濁度為1.49 NTU,均超過生活飲用水衛(wèi)生標準限值。4、研究表明,不同水源摻混可有效控制濟寧地區(qū)管網(wǎng)鐵釋放,增加濟寧地下水比例,當濟寧地下水與南水北調(diào)水摻混比例達到1:1時,管網(wǎng)出水總鐵和濁度均達標;通過投加NaHCO3藥劑調(diào)節(jié)進水堿度,當進水堿度達到340 mg/L時,管網(wǎng)出水總鐵滿足限值要求;通過投加Na2HPO3緩蝕劑,當進水磷酸根離子濃度達到2 mg/L,可有效控制管網(wǎng)鐵釋放;通過增加進水余氯量,當余氯值到達0.5 mg/L左右時,管網(wǎng)鐵釋放逐漸減少,隨著進水余氯值不斷增加,管網(wǎng)鐵釋放現(xiàn)象不再緩解,因此增加余氯量,不能有效控制出水濁度和鐵釋放量。
[Abstract]:In this paper, the process of iron release from old pipe network in Jining and Dongying areas is studied under the condition of multi-source water supply with South-to-North water transfer water as the main experimental water. The main contents of the study are as follows: (1) the microscopic morphology and composition analysis of the old network pipe scale in Jining and Dongying; (2) according to the water quality characteristics of South-to-North Water diversion Project, a suitable system for judging the chemical stability of water quality is established, and the chemical stability of South-to-North Water diversion Water quality is evaluated. (3) to study the effect of different water quality conditions (different water source switching, chloride ion, sulfate radical) on iron release from old pipe networks in Jining and Dongying; (4) aiming at the phenomenon that the effluent iron of the old pipe network in Jining area exceeded the standard after the water source switch, the control study of iron release was carried out under the condition of multi-source water supply. The main results of this paper are as follows: 1. Through the electron microscope scanning analysis, element energy spectrum analysis and material diffraction analysis, it is concluded that the main composition of the tube scale is the oxide of iron. The main components of pipe network scale in Dongying area are Fe3O4 (magnetite), 偽-Fe O (OH) (goethite (偽-Fe O (OH) (goethite) and CaCO3 (limestone), while more 緯-FeO (OH) (fiberite is detected in Jining area. It is caused by different water quality and hydraulic conditions in both places. According to the characteristics of water quality of South-to-North Water transfer, three judgement indexes, Langelier saturation index, CCPP calcium carbonate precipitation potential and Larson ratio, are selected to evaluate the chemical stability of water quality. The water is scale quality and Larsen ratio is high. Yellow water is easy to occur when the pipe network should switch water from south to north. 3. The iron release of the old pipe network in Jining and Dongying areas is influenced by the concentration of sulfate and chloride ion in the influent. With the increase of sulphate ion concentration and chloride ion concentration, the iron release from the pipe network increases. By switching the source of water from south to north water transfer, when the effluent is stable, the total iron content in Dongying area reaches 0.27 mg/L, turbidity of 0.87 NTU, meets the sanitary limit of drinking water. The total effluent iron of Jining area is 0. 45 mg/L, and turbidity is 1. 49 NTU,. 4. The study shows that mixing different water sources can effectively control iron release in Jining area. When the ratio of Jining groundwater and South-to-North Water transfer reaches 1:1, the total iron and turbidity of the effluent reach the standard. When the influent alkalinity is adjusted by adding NaHCO3 reagent, when the influent alkalinity reaches 340 mg/L, the total iron in the effluent meets the limit requirement, and the iron release can be effectively controlled by adding Na2HPO3 inhibitor when the influent concentration of phosphate ion reaches 2 mg/L,. By increasing the amount of residual chlorine in the influent, when the residual chlorine value reaches about 0.5 mg/L, the iron release decreases gradually. With the increase of the residual chlorine value of the influent, the phenomenon of iron release in the pipe network is no longer alleviated, so the residual chlorine content is increased. Water turbidity and iron release can not be effectively controlled.
【學位授予單位】：山東建筑大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TU991
[Abstract]:In this paper, the process of iron release from old pipe network in Jining and Dongying areas is studied under the condition of multi-source water supply with South-to-North water transfer water as the main experimental water. The main contents of the study are as follows: (1) the microscopic morphology and composition analysis of the old network pipe scale in Jining and Dongying; (2) according to the water quality characteristics of South-to-North Water diversion Project, a suitable system for judging the chemical stability of water quality is established, and the chemical stability of South-to-North Water diversion Water quality is evaluated. (3) to study the effect of different water quality conditions (different water source switching, chloride ion, sulfate radical) on iron release from old pipe networks in Jining and Dongying; (4) aiming at the phenomenon that the effluent iron of the old pipe network in Jining area exceeded the standard after the water source switch, the control study of iron release was carried out under the condition of multi-source water supply. The main results of this paper are as follows: 1. Through the electron microscope scanning analysis, element energy spectrum analysis and material diffraction analysis, it is concluded that the main composition of the tube scale is the oxide of iron. The main components of pipe network scale in Dongying area are Fe3O4 (magnetite), 偽-Fe O (OH) (goethite (偽-Fe O (OH) (goethite) and CaCO3 (limestone), while more 緯-FeO (OH) (fiberite is detected in Jining area. It is caused by different water quality and hydraulic conditions in both places. According to the characteristics of water quality of South-to-North Water transfer, three judgement indexes, Langelier saturation index, CCPP calcium carbonate precipitation potential and Larson ratio, are selected to evaluate the chemical stability of water quality. The water is scale quality and Larsen ratio is high. Yellow water is easy to occur when the pipe network should switch water from south to north. 3. The iron release of the old pipe network in Jining and Dongying areas is influenced by the concentration of sulfate and chloride ion in the influent. With the increase of sulphate ion concentration and chloride ion concentration, the iron release from the pipe network increases. By switching the source of water from south to north water transfer, when the effluent is stable, the total iron content in Dongying area reaches 0.27 mg/L, turbidity of 0.87 NTU, meets the sanitary limit of drinking water. The total effluent iron of Jining area is 0. 45 mg/L, and turbidity is 1. 49 NTU,. 4. The study shows that mixing different water sources can effectively control iron release in Jining area. When the ratio of Jining groundwater and South-to-North Water transfer reaches 1:1, the total iron and turbidity of the effluent reach the standard. When the influent alkalinity is adjusted by adding NaHCO3 reagent, when the influent alkalinity reaches 340 mg/L, the total iron in the effluent meets the limit requirement, and the iron release can be effectively controlled by adding Na2HPO3 inhibitor when the influent concentration of phosphate ion reaches 2 mg/L,. By increasing the amount of residual chlorine in the influent, when the residual chlorine value reaches about 0.5 mg/L, the iron release decreases gradually. With the increase of the residual chlorine value of the influent, the phenomenon of iron release in the pipe network is no longer alleviated, so the residual chlorine content is increased. Water turbidity and iron release can not be effectively controlled.
【學位授予單位】：山東建筑大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TU991
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