The application of NA400 in water treatment

An overview, as the deputy center urban area of nanjing, XX district economic development and urban construction has entered a period of high-speed growth. With the rapid development of economy, the region's environmental problems are increasingly prominent. At present, the industrial park of the majority of untreated industrial wastewater and sewage direct emissions to water, seriously polluted the ground, underground water system, affecting people's lives and health, restricted the development of the city. At the same time, people also more and more high to the requirement of environmental protection. Therefore, the construction of sewage treatment plant has become a top priority. According to the urban planning, XX sewage treatment plant scale are divided into two stages: the stage 4. 00000 m3 / d, phase ii 8. 00000 m3 / d. The whole production area has a coarse grid, improve pump room, fine grille, vortex grit chamber, biochemical pool, sludge storage pool, sludge dewatering, blower room and drainage pump room and other ancillary buildings, etc. Process flow diagram is as follows: the system structure, control system design of this system adopts NA400PLC controller as core control station, a total of 6 sets, respectively, biochemical pool biochemical pool 1 #, 2 #, 3 # biochemical biochemical pool, pool, 4 # blower room, pump room. Each set of PLC is equipped with a touch screen, NA400 bring 485, Modbus communication with touch screen directly to realize the site operation, convenient and economic. Considering the distance between each control station are far apart, provided by the optical fiber transmission network transmission rate and bandwidth are much higher than twisted-pair, optical fiber transmission is not affected by EMI and RFI, lightning and other interference, fully comply with the requirement of industrial network performance and reliability. NA400 series CPU built-in Ethernet front-end ports and optical switches of TCP/IP network, save the communication module, economic and reliable. Field control station through field bus and communication between each manufacturer supporting the scene control sub station, field data collected, to various production process parameters such as water quality, flow rate, dissolved oxygen, water and electricity parameters such as current, voltage, power, power and other testing and data processing, at the same time for each production equipment condition monitoring and control. Three, the conclusion NA400 series PLC in the industry are widely used, reliable performance and can meet the demand of all kinds of control. As an independent design research and development of domestic medium-sized PLC controller, improve the performance of our products is perfect, certainly will replace foreign products in the near future, become the pride of Chinese.
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