Back to results
US 9,541,286 B2Granted
Method for expanding a chemical recovery boiler
AssigneeAndritz Inc.
InventorsJan Storbacka, Petri Tikka
Life of this patent
Estimating the term…
Abstract
In a boiler, a space is reserved to expand the boiler by increasing the front and rear walls. To expand the boiler, wall additions are added to increase the width of the front and rear walls. After the expansion, the distance between the front and rear walls is substantially the same distance between the front and rear walls before the expansion.
Claims12
A method for expanding a chemical recovery boiler having a front wall, a rear wall and a pair of side walls between the front and rear walls, the method comprises:
- operating the chemical recovery boiler in a first capacity range wherein the front wall, the rear wall and the pair of sidewalls define a combustion zone and the pair of sidewalls is separated by a first distance and the front wall and the rear wall are separated by a third distance, wherein at least one of the front wall and rear wall includes a secondary air nozzle;
- positioning at least one sidewall such that the pair of sidewalls is separated by a second distance greater than the first distance;
- attaching the at least one sidewall to the front wall and the rear wall, wherein the pair of sidewalls is separated by a second distance greater than the first distance and the combustion zone has an increased volume due to the greater distance between the pair of sidewalls and wherein the front wall and the rear wall remains separated by the third distance after attaching the at least one sidewall;
- in cooperation with attaching the at least one sidewall to the front wall and the rear wall, increasing a width of the front wall and the rear wall such that the third distance between the front wall and the rear wall when the boiler operates in the first capacity range is substantially equal to the third distance between the front wall and the rear wall when the boiler operates at a capacity greater the first capacity range;
- adding at least one secondary air nozzle to at least one of the front wall and the rear wall, wherein the added secondary air nozzle is on a section of the front wall or rear wall added in conjunction with the increase of the width of the front wall and the rear wall, and
- after attaching the at least one sidewall, increasing the width of the front wall and the rear wall and adding the at least one secondary air nozzle, operating the chemical recovery boiler at the capacity greater than the first capacity range.
3 more elements
A method to expand a chemical recovery boiler having a front wall, a rear wall and a pair of side walls defining a combustion zone, the method comprises:
- operating the chemical recovery boiler in a first capacity range wherein the front wall, the rear wall and the pair of sidewalls define a combustion zone and the pair of sidewalls is separated by a first distance and the front wall and the rear wall are separated by a third distance, wherein at least one of the front wall and rear wall includes a secondary air nozzle;
- removing a sidewall of the pair of sidewalls from between the front wall and rear wall;
- positioning the removed sidewall a distance from the opposite sidewall greater than the first distance;
- extending the front wall and the rear wall;
- connecting the extended front wall and extended rear wall to the pair of the side walls after the positioning of the removed sidewall , wherein the extended front wall and the extended rear wall remain separated by the third distance after being connected to the pair of the side walls;
- adding at least one air nozzle to an extended portion of the front wall or the rear wall, and
- after the connection of the extended front wall and the extended rear wall to the pair of the side walls and after the addition of the at least one air nozzle, operating the chemical recovery boiler at a capacity greater than the first capacity range.
4 more elements
Dependencies are inferred from the claim text.