This paper introduced the basic control mode of automatic control system of coagulant dosage , taking the technique of streaming current defection for example , and then the merits and demerits of each control mode and the applicability was analyzed 以流动电流检测技术为例,介绍混凝投药自动控制系统的基本控制方式,并且对各种控制方式的优缺点及适用条件作了分析。
Abstract : this paper introduced the basic control mode of automatic control system of coagulant dosage , taking the technique of streaming current defection for example , and then the merits and demerits of each control mode and the applicability was analyzed 文摘:以流动电流检测技术为例,介绍混凝投药自动控制系统的基本控制方式,并且对各种控制方式的优缺点及适用条件作了分析。
Because of the influences of the turbidity , ph of raw water , current , temperature and the pollutions of raw water , the process of coagulant dosage is a very complex reaction . to find out the automation of coagulant dosage and reduce the cost of the coagulant , many domestic and international scientific research organizations make research into the theory and mechanism of automation of coagulant dosage , such as the streaming current control method ( scd ) , the emulation experimenting method in spot , mathematics model , flocculation control device ( fcd ) 由于受到原水浊度、 ph值、配水流量、原水温度和其他水质污染的影响,投药絮凝过程是一个非常复杂的反应过程,为实现投药系统的自动化和降低混凝剂耗率,国内外相当多的科研机构和院校在进行投药机理和自动化处理的研究,主要有流动电流仪检测法( scd ) 、现场模拟实验法、数学模型、显示絮凝控制法( fcd法)等自动投药方式的研究和实验。
stream: n. 1.河流,小河;川,溪。 2.流出,流注;一连串, ...current: adj. 1.通用的,流行的。 2.现在的,现时的,当时 ...current input stream: 当前输入流current output stream: 当前输出流fore and aft stream current: 沿船体纵向流stream current potential: 流动电势a stream of: 一连串,一系列; 一连串的..be on stream: 投入生产in a stream: 处于-状态of the stream: 小溪on stream: 进行生产; 在开发过程中; 在流程中; 在运转中on-stream: adv.,adj. 在生产中(的)。 stream: n. 1.河流,小河;川,溪。 2.流出,流注;一连串,(人物等的)辈出。 3.(事件等的)连续;(财富等的)滚滚而来。 4.趋势,倾向,潮流。 5.〔英国〕(一个年级学生中按智力划分的)班组。 A bridge is being built over the foaming stream. 正在这条怒流滚滚的河上建造一座桥。 The accident delayed a long stream of cars, buses and bicycles. 这一交通事故阻碍了一条汽车、公共汽车和脚踏车的长流。 a stream of lava 熔岩流。 sun streams 太阳光线。 the stream of time [times] 时代趋势。 the stream of popular opinion 舆论趋势。 the stream of thought 思潮。 against the stream 逆流;违反时势。 down (the) stream 顺流,向下游。 go by in a stream 一连串陆续通过。 in streams [a stream] 连续,陆续,接连,川流不息地。 in the stream 在河的中流。 up (the) stream 逆流,向上游。 with the stream 顺流;顺应时势。 vi. 1.流,流动;(泪等)流出;(光线等)射出。 2.蜂拥而进,鱼贯而行,川流不息地通过。 3.(旗等)飘扬,招展;(头发)飘动。 vt. 1.使流,使流出,倾注。 2.使飘扬;展开(旗帜等)。 3.把(学生)按智力等分班。 Students are now streaming back to their dormitories. 现在学生们川流不息地回到宿舍去。 I turned off the light and let the moonlight stream in through the window. 我关上电灯,让月光从窗间照射进来。 The flag is streaming in the wind. 旗帜在风中飘扬。 a streaming cold 流鼻涕淌眼泪的感冒。 a streaming umbrella 淌着雨水的伞。 crowd streaming past 接连不断走过的群众。 Her eyes streamed tears. 她的眼睛流泪。 The honeysuckle was streaming scent. 忍冬花放出香气。 The school streams pupils into three classes. 学校按智力把学生分成三班。 adj. -d 1.=streamline. 2.最新式的。 stream no: 物流号stream on: 在流程中current: adj. 1.通用的,流行的。 2.现在的,现时的,当时的。 3.流畅的;草写的。 the current price 市价。 current news 时事。 current expenditure 经常费。 current expenses 日常费用。 the current issue [number] (杂志的)本期。 the current week 本星期。 the current year 今年。 the 10th current [curt.] 本月十日。 current account 往来存款账;【法律】交互计算。 current English 现代通行英语,日常英语。 current handwriting 草书。 current money 通行货币。 current rate 现价,成交价。 current thoughts 现时代思潮。 pass [run, go]current 通用,流行。 n. 1.水流;气流;电流。 2.思潮,潮流;趋势,倾向。 3.进行,过程。 a cold current 寒流。 the Japan current 日本海流,黑潮。 the great current of events 天下大势。 a density 密着(海)流。 an alternating [a direct] current 【电学】交[直]流电。 current of air 气流。 current of time [the times] 时势,时代潮流 (go [swim] with [against] the current of the times 顺应[违反]时势)。 current the: 潮流; 柯伦特of current: 电流值revived stream;rejuvenated stream: 复活河stream-to-stream time: 停工检修时间a brawling stream: 哗哗哗流淌的小溪a day in the stream: 钓鱼的收获a gurgling stream: 流水淙淙; 溪水淙淙a limpid stream: 清亮的溪水a lucid stream: 清澈的溪流