330100-90-00 | BENTLY | Zero Point C Series Distributed IO

Description

330100-90-00 | BENTLY | Zero Point C Series Distributed IO

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With the continuous development of human society and industrial modernization, the problem of water resource shortage is becoming increasingly serious. Optimizing and implementing automated control of urban domestic sewage treatment processes has profound theoretical significance and practical value in improving sewage treatment efficiency, saving funds, and improving environmental quality.

The process flow of sewage treatment can be roughly divided into pre-treatment, biochemical treatment, and deepening treatment. In the process of upgrading and renovating sewage treatment plants, technological innovation is crucial. The transformation and upgrading of the industry cannot be separated from the guarantee and support of new technologies and high-tech.
The sewage treatment plant adopts Siemens 1500 as the main control PLC, located in the central control room, and uses the Zero Point ES series switch to build a ring network platform. Each process section uses the CN-8032-L module as the slave station, and data collection and control of the process section are achieved through IO. The control is transmitted to the PLC through the connection to the ring network switch.
The process section includes:
1. Preprocessing section: This section sets up a CN-8032-L as the slave station. The pre-treatment section includes the control of coarse and fine grids and the aeration sedimentation tank. Remote start stop control of the grids is achieved through the CT-121F module and the CT-222F module. The aeration sedimentation tank is provided by a complete set of equipment manufacturers, with a 485 interface provided externally and supporting the standard Modbus RTU protocol. Monitoring is achieved through communication with the aeration sedimentation tank using the CT-5321 module, and linkage is achieved with the inlet and grid.

2. Carbon source addition room: In order to ensure that the total nitrogen emissions meet the standards, the amount of total nitrogen in wastewater is reduced by adding a carbon source. This process section is equipped with multiple flow meters and on/off valves to achieve automatic configuration of the chemical solution. CN-8032-L is also set as a slave station at the station, and the CT-121F module and CT-222F module are used to control the on/off valves. The PNM02 V2.0 gateway is used to collect the instantaneous flow and cumulative flow of 8 sets of flow meters on site, After connecting to the ring network, it is directly transmitted to the PLC.

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