More than three years ago, an international forest products company made the decision to replace an aging boiler in order to meet the increasing energy and steam needs of the mill.

In the crowded mill, space was a premium and some “out of the box” thinking was required to keep the mill on-line during their expansion. Barnhart was asked to evaluate the feasibility of relocating two elevated electrostatic precipitator (ESP) boxes from one side of the boiler to the other to make room for the new contruction. Barnhart evaluation…it can be done!

The two independent ESP boxes were effectively 60’ cubes weighing over 600 Tons installed on structures about 50’ in the air. Barnhart had to develop a system that would jack, slide and lower the boxes to the ground for transportation to the new site where the process would be repeated for installation on the new structure.

A methodology was developed that allowed the installation of jacks on each column of the box prior to the outage. In addition, the “elevator” style Modular Lift Tower was erected while the mill was running. Then Barnhart was given only 12 days to completely relocate each precipitator box.

Once each ESP box was off-line, the Barnhart team worked around the clock to jack, slide, lower, transport and re-erect the 600 Ton ESP boxes.

The job featured many unique tools such as the custom integrated jacking system, a 1,000 Ton slide system, the Barnhart Modular Lift Tower and our new Goldhofer PSTe electronic steer trailer. Each move was completed ahead of schedule in only 11 days!


PRIMARY EQUIPMENT USED:

• Two - Modular Lift Towers

• Four - 450 Ton Strand Jacks

• 28 lines of PSTe Goldhofer Platform Trailers

• Four - 200 Ton “Valliant” Jacks

• Five Foot Girder Slide System

Equipment Used in this Project

• Hydraulic Slide System
• Modular Lift Tower: Custom Configurations
• Strand Jacks