Urban sewage treatment self-control systemIt is required to operate stably, safely, and efficiently in a strict industrial environment for a long time. The design of system components must comply with industrial standards, meet domestic and international safety regulations, achieve easy configuration, easy maintenance, corrosion resistance, and adaptability to environmental temperature changes. During system operation, it is also required to support hot plugging.

Shanghai Yidong Sewage Treatment Plant Automatic Control System

Whether it is a domestic sewage treatment plant or an industrial sewage treatment plant, although there are differences in production processes, the composition of their self-control systems is similar, usually consisting of two core parts: the operation station and upper software located in the central control room, and the PLC control station located in the on-site process workshop. In addition, major municipal design institutes in China also classify the central control room screen, instruments, video security, etc. as self-control professional packages when providing design drawings. The self-control system of Shanghai Yidong's sewage treatment plant follows the principles of "centralized management, decentralized control, and resource sharing" in terms of upper software, and "process necessity, advanced practicality, and convenient maintenance" in terms of PLC control station. The system diagram is as follows:

Functional Plan Analysis of Automatic Control System in Sewage Treatment Plant

Solution for PLC water treatment automatic control system

The water treatment self-control system fully considers the design requirements and implementation characteristics of the project. In the overall implementation plan, a PLC control cabinet is used for on-site collection and control, which realizes the collection and display of sensor and equipment status, and controls the start stop switching of on-site equipment according to process requirements. Through the 4G wireless gateway, video signals, device status, and sensors are transmitted to the information management center, laying the foundation for centralized management in the later stage.

The sewage treatment automation control system platform provides real-time, rich, and accurate information management services for sewage plants from administrative planning, design, construction, operation, supervision, and other aspects, including production and operation, safety management, water quality monitoring, fault warning, data query, expert decision-making, etc; Provide big data support for analysis and decision-making; To achieve intelligent and precise unified management technology for unmanned operation, emergency response, energy conservation and emission reduction, and process improvement.

01. The layout of the upper software interface introduces the concept of "cockpit", and the screen adopts a three-dimensional height reproduction of the real scene, controlling the overall situation and making it clear at a glance;

02. High reliability, there are three control modes in system design, namely on-site control, centralized control, and automatic control. Each local control unit is relatively independent and can operate off grid;

03. Advanced network services, the system should be able to support data collection and programming simultaneously on the same media link Functions such as upload/download, I/O control, etc. should be able to achieve system transparent browsing, programming configuration, real-time control, data acquisition, and system diagnosis on the same medium on any level of network;

04. Implement production process automation and management informatization, using a PLC+PC control system that integrates centralized management and decentralized control, as well as various forms of data display, recording, analysis, statistics, accident alarm, printing, storage, etc. in Web/APP+OPC sub items;

Seven elements of urban sewage project design scheme

(1) One mechanical grille, controlling the separation of floating objects from sewage;

(6) The supernatant is further processed in the artificial wetland and treated with ultraviolet disinfection equipment to meet the discharge standards before being discharged into the river;

(7) All devices must achieve local and remote (touch screen and cloud) control functions.