本文選題：礦井水 + 資源化��； 參考：《河北工程大學(xué)》2015年碩士論文

【摘要】：對河北南部某集團(tuán)礦區(qū)礦井水資源化利用現(xiàn)狀進(jìn)行了調(diào)研,針對高懸浮物高礦化度礦井水資源化關(guān)鍵技術(shù)進(jìn)行了試驗(yàn)研究、方案設(shè)計(jì)及應(yīng)用研究。河北南部地區(qū)礦井水總排放量37500 m3/d,礦區(qū)自用水量24950 m3/d,自用率67%,包括用于農(nóng)田灌溉的20-25%的水量,礦井水總利用率達(dá)到90%以上。根據(jù)礦井水水質(zhì)分析,主要有常規(guī)礦井水、高懸浮物礦井水、高礦化度礦井水和特殊污染礦井水四大類。針對懸浮物的去除全部采用澄清(混凝沉淀)+過濾工藝,處理率達(dá)到100%�？偨Y(jié)高懸浮物礦井水資源化關(guān)鍵技術(shù)主要有:預(yù)沉調(diào)節(jié)作用,混凝劑的選擇和水力條件(GT值)的優(yōu)化,污泥回流作用。通過對五礦六礦高懸浮物礦井水的粒度分析和沉降性能試驗(yàn)表明,礦井水中懸浮物粒徑在1-20μm之間,自由沉淀時間大于1h,懸浮物去除率可達(dá)80%�？衫妙A(yù)沉調(diào)節(jié)池去除易沉降的懸浮物,為后續(xù)工藝減輕負(fù)荷。五礦礦井水水質(zhì)變化大,在處理過程中需要根據(jù)水質(zhì)情況更換不同的藥劑,才能達(dá)到排放標(biāo)準(zhǔn)。針對五礦三種水質(zhì)的混凝試驗(yàn)得出最佳藥劑組合和投藥量為:PAC(80mg/L)+NPAM(0.4mg/L),PAC(80mg/L)+CPAM(0.4mg/L),PAC(80mg/L)+200目磁粉(100mg/L)。將試驗(yàn)結(jié)果應(yīng)用于工程后,澄清池澄清效果良好,濾池反沖洗周期恢復(fù)正常。六礦礦井水的混凝試驗(yàn)表明,最佳的藥劑組合和投藥量為PAC(80mg/L)+NPAM(1mg/L)+200目磁粉(100mg/L)。試驗(yàn)結(jié)果應(yīng)用于工程后,系統(tǒng)運(yùn)行正常,處理效果好�？偨Y(jié)高礦化度礦井水資源化關(guān)鍵技術(shù)主要有:強(qiáng)化預(yù)處理,反滲透除鹽工藝優(yōu)化設(shè)計(jì),膜污染控制。針對五礦高礦化度礦井水,通過方案比較,采用超濾—反滲透工藝,估算總投資390萬元,制水成本為2.01元/m3,年收益可達(dá)98.3萬元。針對六礦反滲透系統(tǒng)的膜污染,采用先堿洗后酸洗再殺菌的清洗方法,清洗液為:堿溶液0.2%NaOH,酸溶液0.2%HCl,殺菌劑1%甲醛。清洗后RO出水各項(xiàng)指標(biāo)基本上恢復(fù)到了初始狀態(tài),系統(tǒng)能夠穩(wěn)定運(yùn)行,產(chǎn)水水量和除鹽率接近設(shè)計(jì)值,達(dá)到了預(yù)期的效果。
[Abstract]:The present situation of mine water resource utilization in a certain mining area in southern Hebei province is investigated. The key technology of water resources utilization in high suspended solids and high salinity mine is studied experimentally, scheme design and application research are carried out. The total discharge of mine water in southern Hebei province is 37500 m3 / d, and the self-water consumption in mining area is 24950 m3 / d. The self-use rate is 67%, including 20-25% of the water used for irrigation of farmland, and the total utilization ratio of mine water is over 90%. According to the analysis of mine water quality, there are four kinds of mine water: conventional mine water, high suspended substance mine water, high salinity mine water and special polluted mine water. For the removal of suspended matter, clarification (coagulation and sedimentation) filtration process is adopted, and the treatment rate reaches 100%. The key technologies of water resources in high suspended mine are summarized as follows: the regulation of pre-settling, the selection of coagulants and the optimization of hydraulic conditions (GT), and the reflux of sludge. The particle size analysis and settling performance test of mine water with high suspended matter in No. 6 mine show that the particle size of suspended matter in mine water is between 1-20 渭 m, the free settling time is more than 1 h, and the removal rate of suspended matter can reach 80%. The pre-settling regulating tank can be used to remove the easy settling suspended matter, which can reduce the load for the subsequent process. The water quality of Minmetals mine water varies greatly, so it is necessary to change different chemicals according to the water quality in order to meet the discharge standard. According to the coagulation test of three kinds of water quality of Minmetals, the best combination and dosage is: 80 mg / L) NPAMN 0.4 mg / L) CPAM 0.4 mg / L) PAC80 mg / L) 200 mesh magnetic powder 100 mg 路L ~ (-1). After applying the test results to the project, the clarification effect of the clarifier is good, and the backwashing cycle of the filter returns to normal. The coagulation test of mine water in No. 6 Mine shows that the best combination of chemicals and dosage is PAC80 mg / L) NPAM 1 mg / L) 200 mesh magnetic powder 100 mg / L ~ (-1) ~ (-1) 路L ~ (-1) ~ (-1) 路L ~ (-1) 路L ~ (-1). The test results show that the system runs normally and the processing effect is good. The key technologies of high salinity mine water resources are summarized as follows: strengthening pretreatment optimizing design of reverse osmosis desalination process and membrane fouling control. In view of the mine water with high salinity in Minmetals, the total investment is estimated to be 3.9 million yuan, the cost of water production is 2.01 yuan / m ~ (3), and the annual income can reach 983000 yuan by comparing the schemes and adopting ultrafiltration and reverse osmosis process. In view of membrane fouling of reverse osmosis system in No. 6 mine, the cleaning method of alkali washing, acid washing and sterilizing was adopted. The cleaning solution was: alkali solution 0.2 NaOH, acid solution 0.2 HCl, fungicide 1% formaldehyde. After cleaning, each index of RO effluent is basically restored to the initial state, the system can operate stably, the water yield and desalination rate are close to the design value, and the expected effect is achieved.
【學(xué)位授予單位】：河北工程大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：X751

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