Application

RM1 ESP & RM 2 ESP of a cement plant located in West Malaysia.

Problem

  • There was excessive dust emission of around 250 mg/Nm3. The customer wants to rehabilitate the ESP to ensure that the final dust emission through the exhaust chimney is less than 50 mg/Nm3.
  • ESP had been in operation for more than forty years, and some of the internal parts have reached the end of their working life
  • The TR sets were not capable of maximizing the performance of the ESP

Solution

Tai & Chyun was invited to inspect the ESP and provide solutions in lowering the emission. Few options were provided, and it was finally decided to rehabilitate the internal parts of the ESP to new design and also replace the old TR sets with new ones. The rehabilitation works were completed in four (4) weeks. The scope is detailed below:

  • Installation of New CP & CP Suspension Beam, DE & DE Suspension Frame and Rapping System
  • Installation of New TR sets
  • Replacement of GD Screen & Support Insulators
  • Cleaning of Screw Conveyor

The difficulties encountered during the rehabilitation work were the bending of DE which was found due to installation process. It was corrected using the F spanner. More seriously bent DE was corrected with heat treatment.

Dismantling of Internal Parts
Installation of DE
Installation of GD Screen
Installation of DE Suspension Frame
Installation of CP
Installation of Support Insulator

Benefits

Dust Emission after rehabilitation becomes stable and satisfactorily reached the customer’s expectation.

ESP Before After
RM1 204mg/Nm3 50mg/Nm3
RM2 241mg/Nm3 59mg/Nm3

RM1- Before (left) & After (right) [*dark blue line indicates trends of emission]

RM2- Before (left) & After (right) [*dark blue line indicates trends of emission]

Field Number Before After (No Load)
RM1 Field 1 37kV/147mA 40.5kV/370mA
RM1 Field 2 54kV/112mA 56.0kV/360mA
RM2 Field 1 34kV/129mA 46.0kV/370mA
RM2 Field 2 34kV/98mA 41.0kV/360mA

 

Tai & Chyun is always ready to provide the modern way of enhancing precipitator performance and all the parts needed in ESP with good after sales service.