Home page

Applications of Automated Control Cabinets in Water Treatment and Environmental Protection Fields

Release time:

2025-10-13

Author:

Source:

Abstract

As environmental standards continue to rise and industrial scales expand, the water treatment and environmental protection sectors are placing greater demands on equipment operational stability, energy efficiency optimization, and remote management capabilities. As the core component of industrial automation systems, automated control cabinets leverage integrated programmable logic controllers (PLCs), sensor networks, and advanced intelligent algorithms to achieve precise control over processes such as wastewater treatment and exhaust gas management. Their application not only enhances processing efficiency but also accelerates the green industry’s transition toward smarter, more energy-efficient operations.

I. Water Treatment Field: From Process Control to Full Lifecycle Management

1. Automated Reconfiguration of the Process Flow

In wastewater treatment scenarios, the automated control cabinet coordinates the synchronized operation of units such as coarse screens, grit chambers, and biochemical reaction tanks through pre-set programs. For instance, the PLC system designed by Beijing Chuangfu Xinrui can monitor the liquid levels in sewage tanks in real time, automatically controlling the start and stop of pumps to prevent flow fluctuations caused by manual operations. In the SBR (Sequencing Batch Reactor) process, the system dynamically adjusts the frequency of aeration blowers—using ultrasonic level gauges and dissolved oxygen sensors—to alternate between aerobic and anoxic conditions, thereby enhancing decarbonization and denitrification efficiency.

2. Energy Consumption Optimization and Fault Prediction

After adopting an intelligent backwashing mode at a certain underground wastewater treatment plant, the service life of the ultrafiltration membranes was extended by 23 days, while the cost of electricity and water per ton decreased by nearly 2 yuan. Key equipment, such as submersible mixers, now features a fault-prevention warning system that accurately predicted the risk of rotor burnout 11 hours in advance, preventing unplanned downtime. Additionally, by optimizing flow distribution through a fuzzy control algorithm, the effluent suspended solids (SS) concentration in the secondary settling tank was stabilized to within 8 NTU—significantly surpassing the performance achieved with conventional manual adjustments.

3. Remote Monitoring and Data Asset Accumulation

Shanghai's Hongqiao area deployed an acoustic wave detection system, accurately identifying 7 cases of early bearing damage faults and saving over 70,000 yuan in component replacement costs. Meanwhile, the Shenyang Tiexi Wastewater Treatment Plant has accumulated more than 70,000 sets of activated sludge sample data, which, combined with BP neural network calculations, helped determine the optimal sludge retention time (SRT), boosting the biological reactor's treatment efficiency by 16%. Additionally, a remote monitoring platform enables coordinated control across multiple sites, reducing response time to emergency conditions to just 6 seconds, while simultaneously displaying dispatch instructions that outline the resource allocation plan.

II. Environmental Protection Field: From End-of-Pipe Treatment to Source-Based Prevention and Control

1. Precise Control of Exhaust Gas Treatment Systems

In VOCs (volatile organic compounds) treatment scenarios, the automated control cabinet manages the adsorption-desorption cycle via PID control mode. For instance, a chemical company has implemented a dual-loop redundancy design: when the main PLC fails, the sub-module automatically takes over to adjust the brightness of the UV lamps, ensuring stable catalytic oxidation efficiency. Additionally, the pH probe drift compensation program boosts the daily measurement offset correction rate to 92%, preventing excessive chemical dosing caused by data inaccuracies.

2. The Dynamic Balance of Solid Waste Management

The automated system at the waste-to-energy plant uses weighing sensors and level gauges to dynamically adjust the feeder speed in real time, maintaining the furnace temperature above 850°C to ensure thorough decomposition of dioxins. In a pilot project, mechanical safety valves were introduced that automatically halt sand discharge operations when rainfall warnings reach the orange level, preventing erosion of the filter sand layer. This measure has successfully prevented equipment damage during flood seasons on three separate occasions.

3. Deep Integration of the Energy Management System

Shanxi Taiyuan Wastewater Treatment Plant uses energy data from its aeration units to calculate an efficiency map of the plant’s power distribution system, resulting in annual savings on electricity costs. Meanwhile, the Hangzhou Linping Lake Area Dispatch Platform integrates eight treatment stations, optimizing operations by leveraging pipeline pressure sensors and variable-frequency control of booster pumps—effectively reducing the energy consumption of intermediate water pumps. Additionally, domestically produced high-pressure gas valves achieve positioning accuracy as precise as 0.07 millimeters, perfectly meeting the stringent requirements for managing frequent fluctuations during disinfection processes, while offering a price that is 60% lower than imported alternatives.

III. Technological Breakthroughs and Industry Trends

Domestic Substitution and Cost Reduction

Anhui-based enterprises have developed a data collector featuring 94 control buses, effectively resolving compatibility issues with legacy equipment's hard-wired connections and reducing automation upgrade costs by 40%. Meanwhile, a Hangzhou manufacturer has produced dissolved oxygen sensors that have slashed the prices of imported products by 60% over the past four years, helping to popularize smart control systems in small- and medium-sized wastewater treatment plants.

2. Edge Computing and Cloud-Edge Collaboration

Zhuhai's township sewage treatment plants have adopted a micro-monitoring module combined with cloud computing, reducing operational costs by 17%. Meanwhile, Chongqing Water Group has implemented a visual dashboard that integrates process parameters from across the province. Managers can now review the annual compliance records of any specific process with just 3.5 touch interactions, significantly boosting decision-making efficiency.

3. Security Protection System Upgrade

After three projects in the Northwest region experienced pool overflows due to procedural anomalies, the industry has mandated the implementation of a three-key authorization framework, which separates and manages high-risk operation buttons from core algorithm start-and-stop permissions at different levels. Meanwhile, a project in Xuzhou successfully improved its digestion tank temperature control algorithm, resulting in an annual gas savings of 160,000 cubic meters—demonstrating the seamless compatibility between safety regulations and energy efficiency optimization.

The Ecological Evolution of Automated Control Cabinets

Currently, automation control cabinets are evolving from standalone device control toward integrated operation and maintenance ecosystems. The self-regulating medication dosage solution explored in Rizhao, Shandong, which is linked with intelligent scheduling of transportation fleet routes, and the 17-level mixing speed presets implemented in Shijiazhuang, Hebei, both exemplify the growing trend toward refined, customized configurations. As policies increasingly emphasize comprehensive lifecycle management, sewage treatment centers undergoing upgrades—projects exceeding 300 million yuan in investment—are now required to equip themselves with advanced asset maintenance software tailored for professional use, along with core documentation such as underlying source code for storage controllers. Looking ahead, automation control cabinets will serve as critical infrastructure driving the environmental protection industry’s transformation toward "data-driven asset management" and "service-oriented innovation."

Key words:

How can industrial power distribution equipment help reduce energy consumption and emissions?

Outdoor Meter Boxes in Smart Cities: Remote Meter Reading and Data Monitoring

Hunan Chengyuan Electrical CO.,LTD

Applications of Automated Control Cabinets in Water Treatment and Environmental Protection Fields

2. Energy Consumption Optimization and Fault Prediction

2. The Dynamic Balance of Solid Waste Management

3. Deep Integration of the Energy Management System

3. Security Protection System Upgrade