Electrostatic precipitation in the chimney?

For two decades prior to retirement I worked as Senior Staff Technical Engineer in coke oven research and operation for 2 different major steel corporations. Most coke oven batteries of that age (3 decades) require significant repair to the walls and heating systems. Dark smoke does not usually come from improper combustion unless there is oven to flue leakage. I am surprized that you state there is not significant cross leakage.

Have you obtained and studied the combustion data for the individual walls? I should think that would be wise. What type of battery and heating system is in use?

Unless your firm wishes to "bite the bullet" and do the reairs, which include taking walls out of service for partial rebuild or flue repairs there is no fix. You must seal the cracks with ceramic welding (permanent) or patching material (short term). Use of fused silica brick can be used for repairs.

Unless the heating system is put in good shape, it is impossible to operate batteries at full production without good heating.

If you need to collect the pushing emissions, try a single spot quench car with Minister Stein Hood system, or a cokeside battery shed. Sorry, there are no cheap fixes.

dr_hhatters@hotmail.com

Use better leak proof doors IKIO type. You can source them from Simplex Castings Ltd India. (simplexbhilai@yahoo.com)