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Application Case of Frequency Converter in Sewage Treatment Plant

Views: 90 Author: Site Editor Publish Time: 2025-01-15 Origin: Site

Introduction: With the acceleration of urbanization, the energy consumption problem of sewage treatment plants has become increasingly prominent. As an efficient power regulation device, frequency converters have been widely used in sewage treatment plants to achieve energy saving and consumption reduction, improve equipment operation efficiency and stability. This article will introduce the application of frequency converters in sewage treatment plants and the benefits they bring through a specific case.

Before transformation

Before the transformation, a sewage treatment plant mainly relied on traditional mechanical speed regulation methods, such as valve regulation and motor start and stop control. This method has the following problems:

1. High energy consumption: When the motor is running at full speed, the energy consumption is large, especially when the flow demand is low, a lot of energy is wasted on the valve.

2. Severe equipment wear: The frequent start and stop of the motor has a great impact on the equipment and the power grid, shortening the service life of the equipment.

3. Complex operation: The valve needs to be adjusted frequently by manual operation, which is complex and prone to errors.

Renovation design

In order to improve energy efficiency and equipment operation stability, the sewage treatment plant decided to carry out frequency conversion transformation on the main equipment. The specific design is as follows:

1. Blower: ANYHZ's FST-650L series general-purpose inverter is used to achieve soft start and adjust the air volume according to process requirements.

2. Submersible pump: The FST-650L series general-purpose inverter is also installed to achieve soft start/soft stop, avoid rapids and water cones, and adjust the pump speed according to flow requirements.

3. Control system: PLC is used as the core, combined with inverters and sensors to achieve closed-loop regulation and automatic control.

Later benefits

The renovated sewage treatment plant has achieved significant benefits in many aspects:

1. Significant energy-saving effect: Through frequency conversion speed regulation, the energy consumption of the motor at low load is greatly reduced. According to statistics, the annual electricity saving cost reached 5 million yuan, accounting for 6.3% of the total electricity cost.

2. Extended equipment life: The soft start function of the inverter reduces the impact of motor start and stop, and extends the service life of the equipment.

3. Improved operation stability: The automated control system achieves precise control of the equipment, improving the stability and reliability of the system.

4. Easy operation: Reduces manual operation, reduces the difficulty of operation and the error rate.

Conclusion:

Through the application of frequency converters, the sewage treatment plant not only achieves significant energy-saving effects, but also improves the operation stability and service life of the equipment, and reduces the operation and maintenance costs. The application of frequency converters in sewage treatment plants not only has important economic significance, but also has a positive role in promoting environmental protection and sustainable development. In the future, with the continuous advancement of technology, the application of frequency converters in the field of sewage treatment will be more extensive and in-depth.