PLC application - a waterworks in jiangxi Industrial control -

Water and electricity is an important and indispensable means of production, human life saving water and energy saving has become the era characteristic. Hydropower energy shortages of our country, in the face of the urban sewage wanton emissions, declining water quality, how to make water quality reach the daily life, industrial production reliability, stability, directly affects the normal work of the residents and the development of economy.

with the rapid development of industrial production, equipment is more and more high quality requirements. Traditional methods of different level waste water, electricity, low efficiency, poor reliability, automation degree is not high faults, seriously affecting the industrial system of water. The present water supply mode should be toward the direction of the high efficiency, energy saving, automatic and reliable, based on PLC control technology, electrical automation technology in a body. Through the use of the system can improve the stability and reliability of water supply system of water supply, the system has good energy saving at the same time, it is particularly important in today's increasingly scarce energy, therefore, the design of the system, improve the efficiency of enterprises and people's living standards, and reduce the energy consumption has important practical significance.

jiangxi the preparation of a water plant water system consists of two parts: reverse osmosis pure water system and water injection system. Reverse osmosis pure water system the main control object are raw water valve, the water pump, sand filter after the water temperature control valve, inlet valve, high-pressure pump, flush valve, pure water pump, metering pump, etc.

water injection system is mainly controlled object has a raw water inlet valve, injection water outlet valve and outlet valve, pure steam injection pump, cooling water pump, water pump, the raw cooling water pump, cooling water control valve and steam regulating valve.

in order to adapt to the trend of the development of the water treatment industry, water treatment industry to meet the demand for automatic control system, automatic control system in the future development of water treatment industry main direction includes the following aspects:

redundant control system structure of PLC reasonable communication port Settings

configuration software rich driver professional program module

data analysis, technical support

remote monitoring based on the system requirements, the Siemens S7 - local control 200 series CPU, expand the more letter DP slave station EM277 intelligence module, the other the letter 200 series IO module, through Profibus - DP fieldbus is controlled to transfer field data to the remote the Siemens S7-313 c 2 dp host CPU. So the configuration of the lower cost, convenient wiring, strong scalability, independent running from stand can not depend on the host. PC monitoring using kingview 6. 55 by MPI agreement with Siemens S7-313 c 2 dp communication, the state of each part of the real-time monitoring system and data analysis.

system process flow diagram:

conclusion: PLC electrical automation control system of water treatment. The system USES PLC to realize to start and stop the operation of the many sets of water pump motor, the pump motor control into automatic control system at the same time. Pressure sensor signals transmitted to the control module according to the high-pressure pump pressure control start-stop, guarantee the safe operation of the high pressure pump. Using electrical conductivity table production, resistance rate in real-time monitoring of water quality, the system not only effectively ensure the quality of the water treatment systems, water production, and has reliable operation, simple construction and energy saving effect is remarkable, automatic control, no secondary pollution, etc.

PLC controller technology zone a waterworks, the application of PLC in jiangxi province for industrial wastewater treatment system, provides effective control method is the more the letter OYES 300 PLC application in a domestic steel pipe production line PLC application in the tunnel kiln temperature control system in PLC application in rotary screen printing machine
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