Special power distribution system project for sewage treatment plant
Project overview
We provide a full-process power distribution and control system for a sewage treatment plant with a daily processing capacity of 50,000 tons, focusing on adapting heavy-duty equipment such as blowers, water pumps, and dehydrators, and supporting frequency conversion speed regulation and anti-corrosion design.
Indonesia fit
Help sewage plants complete the selection of cabinet materials, frequency conversion control, lightning protection grounding and remote monitoring in corrosion, high humidity and heavy load startup scenarios, and reduce the procurement risks of short life, frequent tripping and shutdown maintenance of ordinary industrial distribution cabinets; the solution adapts to the long-cycle operation of Indonesian coastal/hot and humid urban sewage treatment plants and the demand for local after-sales spare parts.
Professional configuration and standards
The low-voltage cabinet is in accordance with IEC 61439, the frequency converter is in accordance with IEC 61800, the motor circuit is configured in accordance with IEC 60947, the corrosion area is made of 304 stainless steel or WF2 heavy anti-corrosion coating, IP55 or above box and anti-condensation design; the blower/water pump is equipped with VFD Soft start, overload, phase loss and ground fault protection, complete insulation, withstand voltage, temperature rise, frequency conversion harmonics, corrosion protection and linkage control tests.
Key specification comparison table
| Configuration items | common practice | Optimized delivery specifications and value |
|---|---|---|
| Cabinet material | Ordinary cold rolled steel powder spraying | 304 stainless steel/WF2 heavy anti-corrosion, more suitable for corrosive gases |
| Motor starts | Direct start, large inrush current | VFD/soft start, reducing starting current and energy-saving speed regulation |
| Monitoring method | On-site manual inspection | Centralized monitoring and collection of current, frequency, faults and energy consumption |
Delivery challenges and solutions
a.Challenge: Corrosive gases and water vapor in sewage plants are heavy, and ordinary electrical equipment corrodes quickly and has a short lifespan.
Solution: Electrical equipment undergoes WF2 heavy anti-corrosion treatment, and key cabinets are made of 304 stainless steel, which doubles the service life of the equipment.
b.Challenge: Heavy-duty equipment such as blowers and water pumps have large starting currents and frequent tripping, which affects the treatment process.
Solution: Equipped with variable frequency soft start control, it can start smoothly without impact, and at the same time, the speed can be automatically adjusted according to the water quality and quantity.
c.Challenge: The process sections of the factory are scattered and the workload of operation and maintenance inspections is heavy.
Solution: Establishing a centralized power distribution monitoring system for the entire plant, enabling remote operation and maintenance, reducing on-site inspection workload by 60%.
Project results
The entire plant saves 25% of electricity, saving more than 1.2 million yuan in annual electricity bills; the process operation is stable, and the effluent water quality compliance rate is improved; the equipment update cost is reduced by 50% on average annually.