ESP power supply

Introduction

 

Electrostatic precipitator is used to collect fine particulates in various process or waste gases. When dirty airstream enters ESP, fine particulates are electrically charged in ionized environment and move towards collecting plates. ESP filtration performance is closely realted to corona discharge. There are different ways to improve ESP collection efficiency, such as placing more electric fields, increasing collecting plates, etc. These methods are not good options for a crowded site. Common way is to boost corona power, which is generated by high voltage electrostatic precipitator power supply.

 

Since ESP was invented, different types of ESP power supply are used during the long history. There are typically 4 generations:

 

1. Single phase power supply
2. Single/three phase silicon-controlled power supply.
3. High frequency switch mode power supply (SMPS)
4. Pulse power supply (PPS)

 

SMPS

 

High frequency switch mode electrostatic precipitator power supply (SMPS) could convert 3 phase AC current into high voltage DC current by inverter, transformer, rectifier. Compared with silicon-controlled power supply, SMPS is featured with low ripple, high average voltage, high energy conversion efficiency, high power factor (up to 93%), lower input power required (20-30%).

 

PPS

 

Pulse power supply (PPS) is specially developed for dry type ESP, where particulate diameter is very small and specific resistance is high. Filtration performance is not satisfying because these particulates are difficult to be charged. A high voltage pulse current is coupled with DC current to create secondary voltage with peak up to 140kV. Its high corona power could overcome anti-corona phenomenon to make particulate charged. Emission could be reduced more than 30% for particulates with high specific resistance.

 

Our electrostatic precipitator power supply is featured with small size, integrated assembly, low weight, weather-proof. Its self-protection programm design could guarantee ESP power supply in good shape when unexpected condition happens.

 

Now our electrostatic precipitator power supply is widely used in power plants, iron & steel works, coking plant, chemical industry, paper mill, building material industry, etc.