Project Name: Automatic Control System of Suqian Sewage Chemical Park Water Treatment Plant
Contractor: Nanjing Kangzhuo Environmental Technology Co., Ltd.
Nanjing Kangzhuo Environmental Technology Co., Ltd. is a professional manufacturer engaged in the design and construction of urban sewage treatment plants, automatic control systems for pump stations, central control systems, monitoring systems, and electrical control systems. Kang Zhuo Technology is the top expert of domestic sewage treatment plant automatic control system, strong technical lineup, perfect after-sales service. Consultation hotline of sewage treatment plant automatic control system: 400-0940-400
Automatic control system of sewage treatment plant
I. Overview of Automation System Design
The automatic operation and management of the water treatment plant in Suqian Sewage Chemical Industry Park relies on the real-time detection and analysis of the main equipment and various detection instruments running in the pumping station. In order to detect, display, and display the physical parameters of the pumping station in real time, accurately, and reliably, and to facilitate the connection with the computer control system and the convenience of maintenance management, the full pumping station control system uses fast data processing speed, high accuracy, and good stability. Calais high-performance PCC control system, the instrument selection of high precision, good stability, maintenance-free and smart instrument with on-site LCD display unit. The control system of the Suqian Sewage Chemical Park Water Treatment Plant has a dedicated communication interface connected to the dispatching center for data exchange with the comprehensive dispatching system of the Suqian Sewage Chemical Park Water Treatment Plant.
Design Principles of Automation System
The automation control system of Suqian Sewage Chemical Park Water Treatment Plant requires safety, practicality, economy, and efficiency, which can reach the current advanced level of production automation of pumping stations. The automatic monitoring system of the pumping station complies with the principle of "centralized management and decentralized control". Each part of the system is relatively independent. Vertical and horizontal expansion of the system is completed through network technology. Any part of the maintenance system will not affect the normal operation of other parts. .
3. The main process equipment of this construction project includes:
——Two 280KW submersible mixed flow pumps use soft start control. Get the current and power failure signals of the pump through communication;
——3 sets of submersible mixed flow pumps with 800KW high pressure straight. Get the current and power failure signals of the pump through communication;
——1 mobile grab grill;
——2 sets of electric gates;
—— 2 sets of flat steel gates;
—— 3 sets of ultrasonic level gauges, model of ultrasonic level gauges: ULR1000 0 ~ 9m;
——Two factory transformers are required to take the transformer over-temperature alarm signal, and the incoming line and low-voltage busbar switch to take the opening and closing signals, only for display and not for controlling the switch.
Fourth, the automatic control design function
The control system of Suqian Sewage Chemical Park Water Treatment Plant adopts a distributed secondary distributed computer control system. The central centralized monitoring system is installed in the central control room of the pumping station, and is used to achieve centralized control and management of the entire station. The control system adopts a centralized monitoring method in the control room. The monitoring and management computer communicates with field-level electrical control equipment and instruments such as the PCC control system through industrial Ethernet for data communication, providing comprehensive monitoring, protection, information and regulation for the normal operation of the entire station. The parameters of the pumping station and the operating status of the equipment are processed through the PCC control cabinet and touch screen. At the same time, data exchange is performed with the industrial control computer of the upper operation station. The monitoring screen of the upper computer can display the equipment of the main process sections of the entire pumping station. Operating status and water quality status. Based on these status parameters, the operator can control the field equipment and understand the water treatment status through the mouse and keyboard. The upper operation station adopts fully redundant standby mode. After any one of them fails, the other can continue to work, thereby ensuring the reliable operation of the system.
The selected PCC control system has the current international advanced level of European and American imported brand company product series, and the selected control system has the following performance requirements:
1) Stability: based on a stable, secure, and open source operating system;
2) Scalability structure: The software system adopts a real client / server (C / S) architecture, which can be expanded flexibly and conveniently, and there is no need to modify the server when adding clients. Restrictions; the operation bus (operator station connection server) and process bus (field control station connection server) networks are separated;
3) Openness: Support multiple fieldbus protocols, Profibus-DP / FMS / CAN / CAN OPEN / Modubs / Industrial Ethernet, etc .;
4) All support XML / OPC / MySQL / PVI open system connection protocol and internal X2X communication;
5) Debug directly from the graphic function block (can directly go to variables, IO, trend graphs, etc.);
6) Support disturbance-free download or single task download;
7) Support audit trail function;
8) Integrate various professional industry libraries;
9) With powerful control and monitoring functions and excellent man-machine interface system;
10) The lower-level control and higher-level control have a global system database. The configuration of the system and control strategy need only be done once, and all functions related to the control and reality are accessed through the unique variable name. Avoid data mapping between HMI database and control database to reduce the probability of errors;
11) The upper monitoring software, programming software and system hardware of this system must be the same brand and genuine software;
12) The control system needs to support disturbance-free download, that is, it is not necessary to stop or restart the system when upgrading I / O modules or adjusting some control programs;
13) The control system needs to have strong self-diagnostic capabilities for I / O or network nodes, without the need for third-party software support;
14) The control program can be selected to run on-site control station or host server according to the actual situation, and can be simply set through software.
15) The local expansion of the PCC system must use the POWERLINK bus mode.
16) The touch screen and CPU communication must use CAN BUS mode.
17) With GPRS data receiving and sending functions.
Company Name: Nanjing Kangzhuo Environmental Technology Co., Ltd.
Address: Xiongzhou Industrial Park, Liuhe District, Nanjing
Consulting Tel: 4000-940-400
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