共查询到20条相似文献,搜索用时 15 毫秒
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魏日强 《化工自动化及仪表》2006,33(3):22-25
介绍南洲水厂的工艺流程、投矾工艺及其控制系统的设计,通过研究国内外投矾自动控制的模式,提出采用自学习的模糊专家控制系统进行投矾自动控制,利用周边水厂和广州自来水公司的经验数据和实际运行的一些数据,初步建立一个模糊专家数据库,利用该数据库在线控制投矾泵的运行,并在实际运行中在线自学习修改模糊专家数据库,逐渐达到最优控制的目的.通过南洲水厂在线运行调试,证明此控制有较强的适应性、鲁棒性和自学习性,为水处理的加药控制提供了一种新的自动控制方式. 相似文献
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对实际综合印染废水采用厌氧酸化一好氧生化处理工艺.对比投加复合酶和未投加系统的处理效果。小试结果表明:投加复合酶的系统出水BOD5(平均为6.8mg/L)远低于未投加系统的出水(平均为28.8mg/L)。就CODCr指标而言,投加复合酶的系统出水平均为201mg/L,较之对照系统出水平均为336mg/L,有显著差异。说明在投加复合酶的系统中,在改善生物可降解污染物的去除能力的同时,也强化了对于某些较难降解污染物的降解能力。投加复合酶使系统出水的色度(平均为64倍)远低于对照系统的出水色度(平均为142倍),也说明了这种强化作用。污泥生物相的观察发现,投加复合酶系统中,原生动物和后生动物的种类、数量和活性都超过对照系统。 相似文献
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The effect of replacing AOD dosing units with Schenck Process dosing units is described. 相似文献
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This paper describes the behaviour observed during integration dyeing of a cross-wound wool package with an anionic dye of the supermilling type. The relationships between levelness and the variables dosing time, temperature, liquor flow rate and dye concentration in the fibre, at pH conditions corresponding to the isoelectric point of wool were examined. An increase in the flow rate and of the dye concentration during the dosing was found to improve dyeing levelness, while an increase in temperature and a decrease in dosing time impaired levelness. 相似文献
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针杆藻引起的堵塞是地表水处理中堵塞滤池的原因之一,利用数学模型分析针杆藻的去除率与滤池堵塞程度及反洗周期的对应关系,通过拟合负相关趋势线,相关系数可以达到0.866 9。研究并比较多种措施,如提高加药PAC浓度、投加PAM、加入活性炭、提高水厂加氯量,以及在水库源头进行预加氯等。结果表明,加氯工艺是去除针杆藻的有效措施,针杆藻的去除率与加氯CT中T(反应时间)有直接关系。 相似文献
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G. Vetter 《European Journal of Lipid Science and Technology》1967,69(1):14-20
Construction, Properties and Applications of Dosing Pumps in Processing Technology The construction of package-type dosing pumps is described. In addition to the stroke-adjustible driving mechanism, the different types of feed parts like piston-, membrane- and bellow-type pumping heads are of special importance. The feeding of small amounts, feeding directly from vacuum with dosing pumps, the dosing accuracy, the influence of the properties of the medium as well as installation problems require special construction. The vast field of application for dosing pumps is demonstrated. 相似文献
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文章介绍了大型滨海电厂海水循环冷却水四种杀生处理工艺:(1)电解海水制取氯;(2)加次氯酸钠;(3)加非氧化性杀菌剂;(4)加液氯.通过对这四种工艺进行技术经济比较,得出结论,在条件允许的情况下,大型滨海电厂采用电解海水制氯工艺在技术上和经济上优于其它工艺. 相似文献
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Na_2S药剂添加方法的研究和工艺改进 总被引:4,自引:0,他引:4
主要针对磷酸脱砷药剂Na2S添加方法进行研究和工艺改进,利用Na2S水解过程可逆的原理,通过在Na2S药剂加入前添加抑制剂石灰乳来抑制H2S气体的生成,从而达到改善工作环境,杜绝人员中毒的目的;同时能够减少Na2S药剂添加量,降低生产成本,在实际运用过程中取得了较好的环保效果和经济效益。 相似文献
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流动电流检测仪在混凝过程控制中的应用 总被引:1,自引:0,他引:1
采用流动电流检测法就能准确反映混凝效果。经过实践应用比较,以此建立的混凝投加自动控制系统能做到检测、投加量调节与原水水量、水质变化同步,并取得满意效果。 相似文献
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The use of seawater as a cooling agent in industrial plants is becoming a common practice in regions with water scarcity. One of the main problems of this approach is the heat transfer reduction due to biofouling in the heat exchangers. Biocide agents and scheduled maintenances are commonly used to control the biofilm growth. Dechlorination agents are also used to reduce the biocide concentration in the water discharge. In this work, a mathematical programming approach to develop optimal policies of biocide continuous dosing, dechlorination agents continuous dosing and maintenance scheduling for a seawater-cooled power desalination plant is presented. The resulting mixed integer nonlinear programming model can be used to test different dosing policies to detect a superior one. For the case study presented, results show that daily dosing policies offer an optimum economic policy, although biweekly and monthly dosing policies might provide a suitable compromise between economic and operating issues. 相似文献
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高锰酸盐复合药剂处理北方高色水研究 总被引:1,自引:0,他引:1
针对典型的东北水库水,采用高锰酸盐复合药剂(PPC)进行了强化除色的初步试验研究.对水厂中的两个投加点进行了最佳投药量的试验.确定了最佳投加方式为PPC和混凝剂同时投加,PPC最佳投加质量浓度为0.5-1.5 mg/L.在此条件下,可以提高色度、浊度和CODMn的去除率.表明PPC可以有效地解决色度超标问题.采用PPC替代原来的助凝剂聚丙烯酰胺,不但可以解决技术上的难题,同时还具有经济效益. 相似文献
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For some applications, e.g. processes with stoichiometric reactions or the mixing of powders in a static mixer, a high short-term dosing constancy is necessary. For the dosing of calcium carbonate with a median diameter of 2 μm, it is shown that the pulsation of a volumetric feeder can be reduced tremendously by the use of different attachments for the dosing tube. The best results were obtained with a self-developed rotating star attachment. The quantitative assessment of the efficiency was performed both in the time domain with the standard deviation and in the frequency domain with the fast Fourier transformation. 相似文献
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用微波-Fenton氧化法深度处理焦化废水,研究了微波处理时间、微波功率、FeSO4投加量、H2O2投加量、H2O2投加次数和pH值的影响。实验确定的最佳工艺条件为:废水pH为3,FeSO4投加量为300mg/L,H2O2总投加量为900mg/L,H2O2分3次投加,微波功率500W,温度设为50℃,反应时间为30min。废水浊度、色度和COD去除率分别为97.59%、95.62%、86.21%。处理后的废水澄清透明,剩余COD为50.34mg/L,浊度、色度和COD达到工业回用水标准。 相似文献