Reducing baghouse emissions to meet regulatory requirements

THE OBJECTIVE

A Chinese OEM approached SOLAFT with concerns around the tightening regulations around particulate emissions, to find a cost effective way to reduce PM10 emissions from the baghouse to meet regulatory targets.

THE ISSUE

China has a strict policy around these emission levels, with a high level of scrutiny and breaches attracting large fines and/or forced shut downs. An existing coal-fired plant needed to move from PM30 to PM10 compliance without a baghouse refit, and without adversely affecting differential pressure or filter bag life.

WHAT WE DID AND THE SOLUTION

SOLAFT Filtration Solutions technical team worked with the OEM to develop a specific Low Emission filter media that specifically addressed the need to lower PM10 emissions. Fine fibres were introduced into the fabric to optimise the pore size of the surface filtration media, this allowed particulate capture in the membrane micro-pores of the surface filtration media and increased the rate of dynamic filtration resistance.

A number of media were developed, and rigorously tested under dust load in SOLAFT’s VDI machine located in our Chinese laboratory. The resultant media was then successfully trialled on-site, before full installation of the Low Emission Filter Bags,

OUTCOME

The low emission filter bags were successfully trialled, and the benefits to the Coal-Fired Power Generation plant were:

  • 97% removal of PM10 particles under extreme hazardous air-quality conditions
  • Particulate emissions were maintained below 5mg/Nm3
  • Successfully maintained operating DP