main control unit is used C200HE PLC OMRON PLC products for small and medium companies to facilitate the realization of extension of good manufacturing site; it can further enhance the PC s basic functions, reliable and convenient data processing to improve the efficiency of the production site; CX-Programmer is used in the development of OMRON C200H PLC programming software, running on Windows2000 operating system, in all aspects of automation engineering with user-friendly features. It is committed to enrich the production field of information technology to adapt to Windows software; its full range of units, on a wide range of machinery and equipment for optimal control. 1 Introduction Process In this case according to the raw water quality conditions, the boiler water system supplies water to the water quality requirements, boiler feed water treatment system process: the original raw water tank ???? ???? ???? original pump heat exchanger ???? ???? Multi Media Filters Activated Carbon Pre-filter ???? reverse osmosis desalination intermediate tank system ???? ???? ???? intermediate pump mixed bed ion exchange desalting water tank ???? ???? ???? main plant desalination pumps. Another anti-laundering system, including filters, mixed bed ion exchange regeneration system, chemical dosing systems. The original water tank for storage of raw water entering the system, its purpose is to adjustSection water flow changes, to prevent fluctuations in the influent to the system running, to ensure the system into the water and water quality stability. The original water pump system for pretreatment of raw water to provide adequate flow and pressure. The role is to water heat exchanger to maintain a certain temperature range, in order to facilitate efforts to ensure the stability of reverse osmosis systems. The role of multi-media filter is to filter the raw water caused by small particles, suspended solids, colloids, organic matter and other impurities, and by dosing after the formation of alum, to ensure its water SDI (pollution index) ????è 4. The role of activated carbon filter to remove low molecular weight organic matter in water, free chlorine, but also less water, odor, color and odor. Reverse osmosis desalination system using reverse osmosis membrane pre-feature to remove the most soluble salt in water, colloids, organic matter and microorganisms. Intermediate tank to withstand reverse osmosis water production side of the lower pressure, to avoid back-pressure reverse osmosis membrane Shoudao which cause unrecoverable damage, while the buffer stage ion exchange system as the valve after switching the pressure fluctuations, and through the middle of the water tank Kai Level Control reverse osmosis, stop running. The role of the middle of the post-pumpContinued to provide a stable water treatment system and water pressure. The role of mixed bed ion exchange reverse osmosis water is retained for further removal of the ion. Demineralized water tank for water storage capacity of the system, its purpose is to ensure the stability of the boiler water supply. The role of desalination water pump to provide stability for the boiler system pressure and water.
Figure 1, boiler feed water treatment process 2 control system configuration and description 2.1 Overall control requirements and functional Boiler water treatment requirements of automatic control system is the water treatment process control and automatic adjustment to make the treated water quality objectives to achieve the required range. Water control room PC in the company issued a directive, it will run during the current time the main working parameters (water quality parameters, flow, level, etc.), operating status and a certain period of time the main process and other information from the field on the curve Water reached the control room PC. Functions as follows: [This total of 5 pages, Current Page 1] < < Previous Next > >