INDUSTRY NEWS
We were also impressed that Andritz was so flexible in tailoring their design to our requirements. We all knew this was not going to be a typical installation.
know us and our mill, was a big plus for us,” confirmed Hardin. The team from Graphic Packaging checked references at several European power boiler installations of Andritz (Estonia, Spain and Portugal) before making a decision. “We were impressed with what we saw,” said McGahee. “We were also impressed that Andritz was so flexible in tailoring their design to our requirements. We all knew this was not going to be a typical installation.”
Limited space
A single, large (800-ton) crane was the only option for the erection of the boiler modules and large equipment due to the limited space at the mill. The decided course of action, according to Hardin, was to ‘demolish in, build out’. The only location to place the crane was the spot where the new turbine-generator would be erected. “We had to rotate the boiler 180 degrees in order to place the steam drum where the crane could make the lift,” he explained.
The boiler was erected on top of some of the steel structure from the old recovery boiler. A ‘hole’ was created under an existing pipe bridge – the only space available to bring in trucks, people and equipment. “It was kind of like building a ship in a bottle,” said Hardin. Graphic Packaging gave Andritz Plant Design Engineer, Tapani Heikkilä*, the weight
and size limits for the lifting equipment and Heikkilä designed the modules to fit within those limits. “Tapani had the perfect vision of how the boiler would come together,” said Timo Bungert, Andritz Sales Manager. “He made drawings to show how each module could be lifted into place in a proper sequence.” This sequencing was critical stated Jeff Brown, Andritz Project Manager. “There was little laydown area at the erection site, so each module was transported by truck from a location on the other side of the mill and then lifted into position.”
Hardin added, “Normally, you would put the boiler bottom down, build the upper part of the furnace and then lift the bottom into place. Not here. We needed the space under the boiler to allow access for staging and lifting the fans, ducts, economisers and other components. So, the bottom was brought in last. We eliminated a corner support for our stair tower to make access easier. It was this kind of innovative thinking that
BIOMASS BOILER
An Andritz recovery boiler was delivered on an EPC basis in 1993-94 and established a good reference for the company at the mill.
Left to right: Phil Hardin, Construction Manager, Graphic Packaging; Dan Ash, Senior Product Engineer for Utilities, Graphic Packaging; Timo Bungert, Andritz Sales Manager; and Jim McGahee, Director of Engineering for Graphic Packaging’s Paperboard Division and Project Manager for the biomass boiler.
Spring 2015 11 11
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20