The Sewage Treatment Plant Of Langfang Development Zone Control System Analysis

The sewage plant is to be processed so as to achieve the purpose of reproduction,re-use of industrial and domestic wastewater. The association between devices due to thelarge wastewater treatment plant equipment, and close by personnel operating verydifficult to accomplish, so the wastewater treatment plant automation has also become amust.A simple description of the first sewage treatment plant in Langfang DevelopmentZone program design and process design. Langfang Economic Development Zone SewageTreatment Plant uses a commonly used process SBR process for the town’s small-scalesewage treatment plant plus pottery biofilter and the V-filter.Second, the process requirements, the design of the wastewater treatment plantelectrical, sewage electricity load calculation sheet made according to the coefficient at thesame time the legal system to calculate the monomer and the total electrical load of thewastewater treatment plant, which selected the10KV transformer. Start and control circuitof the electrical and sewage treatment plants in major equipment was introduced.Again, the sewage treatment plant instrumentation automation design and networkdesign. Is expected to reach the level of automation and equipment selection for a briefdescription of the work environment. Instrument selection and design. PLC of the wholeplant sub-station planning and design, and draw a flow chart of the various PLC controlequipment and instrumentation. Backbone transmission network of sewage treatment plantMbps multimode fiber-optic Ethernet network topology for the ring, the support theIEEE802.3Statute and the standard TCP/IP protocol. Sewage treatment plant a variety ofcontrol devices to be seamlessly connected through the industrial-grade Ethernet,high-speed data transmission and real-time control.Finally, this chapter will be specific to each PLC to achieve the specific situationdescribed, and the whole system commissioning and operation are described. Describedthe scene controller, how to control their functions, including process and control ofvarious PLC sub-station, and how they are implemented in the UNITY the PRO and the program features introduced. For debugging problems, adjustment of the monitoringsystem so as to achieve good running condition. And run four years, the authors have beenmonitoring the sewage treatment plant for gradual improvement.In this thesis, the actual engineering, automation design and operation of sewagetreatment plant has a certain reference value.