High-Performance EETC Electrostatic Precipitator: Scraper Technology

1. Technical Overview

The design of the EETC electrostatic precipitator integrates multiple advanced technologies, utilizing a flat bottom structure with?internal drag scrapers?and hoppers.

The drag scrapers?are?installed above the flat bottom and hoppers?of the precipitator, with the movement direction of the drag scrapers?perpendicular to the flue gas direction to ensure efficient ash transport.

At the bottom area of the inlet nozzle?of the precipitator, the same flat bottom design with an internal drag scraper and hopper is adopted, further enhancing the overall system's ash conveying efficiency.

The scrapers inside the electric fields?and the inlet nozzle?continuously transport the ash to the hoppers.?This design effectively solves the problem of ash caking and blockage common in traditional hoppers.

2. Technical Features

2.1 Wear-resistant Materials:

• The drag scraper is made of highly wear-resistant materials such as NM400 and Hardox400, ensuring high durability and strength, which guarantees the scraper's long-term stability and reliability.
• The application of these materials extends the equipment's service life and reduces maintenance frequency and costs.

2.2 Reasonable Scraper Spacing and Movement Speed:

• The drag scraper spacing is set to 919.2mm, with a complete movement cycle of the scraper taking 15-30 minutes (varying depending on the number of channels).
• This design ensures that the collected ash can be promptly cleared, preventing dust accumulation that could damage the equipment.

2.3 Efficient Bearing Seat Design:

• The bearing seat uses graphite-embedded bushings, ensuring smooth and reliable shaft rotation.
• Each bearing seat is equipped with an automatic lubrication device, providing timed and quantitative oil addition to the bushings, ensuring long-term stable operation of the equipment.

2.4 High-Temperature Stability Design:

• The tail shaft of the drag scraper is designed with an adjustable chain tension device, allowing for chain tension adjustments as needed, ensuring effective operation of the drag scraper system in high-temperature environments.
• This design significantly improves the equipment's adaptability and operational stability under high-temperature conditions.

2.5 Half-structure Bearing Seats and Bushings:

• The bearing seats and bushings use a half-structure design, simplifying maintenance processes, reducing the labor intensity and difficulty for maintenance personnel.
• This design makes equipment maintenance more efficient, shortens maintenance time, and improves overall operational efficiency.

2.6 Proximity Switch Detection System:

• Each electric field drag scraper is equipped with a proximity switch at the front of the drive shaft, used to monitor the normal movement of the scraper in real-time.
• In case of an abnormal situation, the proximity switch will send feedback signals to the DCS monitor, triggering an operational anomaly alarm to alert the operating personnel for timely inspection and troubleshooting.

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3. Design Advantages

Efficient Ash Removal:?The drag scraper design enables the precipitator to efficiently clear ash during operation, preventing dust accumulation and ensuring the high efficiency of the equipment.

Convenient Maintenance:?The half-structure design of the bearing seats and bushings, combined with the automatic lubrication device, significantly simplifies daily maintenance work and reduces maintenance costs.

Stable Operation:?The application of wear-resistant materials and high-temperature stability design ensures the equipment's stable operation under various working conditions.

Intelligent Monitoring:?The proximity switch detection system provides real-time monitoring and alarm functions, enhancing the equipment's safety and reliability.

4. Conclusion

The drag scraper technology of the EETC electrostatic precipitator offers exceptional performance and reliability through advanced design concepts and high-quality materials. Its efficient ash removal capability, convenient maintenance design, stable operational performance, and intelligent monitoring system make it an ideal choice for various industrial dust removal applications. Through continuous optimization and enhancement, the EETC electrostatic precipitator will continue to provide high-quality solutions to meet diverse customer needs.