基于plc的污水處理系統(tǒng)外文翻譯(存儲(chǔ)版)
【正文】 整個(gè)控制系統(tǒng)成功地解決了PLC在污水處理中的自動(dòng)化控制問(wèn)題，提高了污水處理設(shè)備運(yùn)行效率和管理水平。t need to operate a personnel an intervention. Various spot data spreads a highest machine through a PLC, e out in the place of honor on board description and make the craft, equipments movement of whole factories get an overall control. The living creature processing part of the PLC3 station control is the whole wastewater treatment of key part, be limited by space, only with the PLC3 stand of program design for example. Process of controlThe PLC3 stations were used to control to get into Pu spirit from sewage, the pond is everywhere sewage run off Pu after manage spirit the whole process of the pond. Include turn of sequence and time switch moderate breezes machine of control various valve, pump, breeze machine to soon regulate etc. in this process .The Pu spirit pond is the core of wastewater treatment to construct a thing, sewage is to e and go through a microbial living creature oxygenation in the pond in addition to organic matter, the processing effect of content to sewage of the oxygen in water is to go to a pass important .Request according to the SBR craft, the deliquescence oxygen in the Pu spirit pond content usually controls within the scope of 1~3 mgs/L and annoy a stage end to fuse an oxygen content in the Pu should be not over the 2 mgs/L. Contain the oxygen once measured low or lead Gao, all will influence a fluid matter quantity. Handle 4 sets of the 10 104 t the SBR of 8 pond modes to respond pond to the day, each one responds that the pond go together with a pedestal from change Pin machine control of breeze machine, used for annoying pond Pu spirit to by turn provide oxygen toward two Pus. Establish 4 pieces of deliquescence oxygen test instruments in the different location of each Pu spirit pond, measure contain of sewage amount of oxygen in pond, the PLC separates a 5 mines to examine a deliquescence oxygen in a Pu spirit pond value each time, according to fuse oxygen of average value to control breeze machine to turn soon. If fuse oxygen low limit at the bottom of the enactment, the frequency modulation breeze machine turns to soon increase 5%。 the long一distance control and monitoring of field equipment are uncharged of the upper puter。When fuse an oxygen value small at the 2 mgs/L, the breeze machine turns to soon rise 5%.If the breeze machine turns to soon rise to allow of tallest turn soon, fuse an oxygen value return small then maintain tallest to turn soon at the 2 mgs/L. This kind of circumstance may annoy the last phase of period to appear in the Pu, but also will not clearly influence wastewater treatment quality.Supervise and control an exportation electric current of change the Pin machine value at any time in the Pu the spirit of the whole period, make it not exceed change the sum of Pin machine settle a value. If meet a surprised circumstance to make to output electric current exceed when the sum settle value, immediately lower breeze machine to turn soon. If the breeze machine turns to soon decline to allow of lowest turn soon, output electric current to return exceed the sum settle a value, then stop breeze machine and send out to report to the police signal in the meantimeAlong with automatic control technical development, the UNITANK craft more and more gets extensively applied. Regard experience as principle currently, use DO, time, discharge as a craft control parameter, adjust the Pu spirit circulate of machine and line up mire the etc. lack accurate mathematics model to carry out the automatic control of higher layer of SBR method for time. Someone once put forward took the COD or the do as parameter of misty control of thought. The research direction of the automatic control of SBR method mainly is to look for several control parameters from now on, since can reflect into water of fluid matter water quantity variety and reaction process in of decline a solution circumstance, and then can do for the calculator control parameter.The PLC gathers in prop
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