The overall structure of the on-line monitoring system for the production process parameters of the large ethylene production process in Fushun petrochemical industry is shown in the following picture. The system is divided into three levels, the first is the data acquisition layer, WIA-PA wireless adapter and the spot quality flow meter and electronic weigher connected through the HART interface, and then by the WIA-PA wireless adapter will upload the data to the WIA-PA intelligent wireless gateway, a data acquisition layer; second is the backbone of the network transport layer, realize the data transmission between the factory station and operation area through the internal network. The upper level is the control center application system, which mainly realizes the human-computer interaction function, which will collect data and analyze the data.
WIA-PA data acquisition subsystem
The WIA-PA data acquisition subsystem is mainly composed of two parts of WIA-PA wireless adapter and WIA-PA gateway, and the single boundary area structure is shown as shown above.
The WIA-PA wireless adapter is used to periodically collect data from the scene, the scene of mass flowmeter to WIA wireless gateway via wireless transmission; the main function of WIA wireless gateway is the management and maintenance of the whole data acquisition subsystem network, provide system analysis, diagnosis and real-time data to the user via Ethernet, real-time access.
Field data acquisition system
The on-site material flowmeter plus WIA-PA wireless adapter realizes the wireless transmission of instantaneous traffic volume, cumulative flow rate, density and temperature signal, and ultimately establishes a material balance network.