Method and system for filter bag unit assembly and filter bag unit

Patent metadata

Field	Value
Publication number	US-10532308-B2
Application number	US-201615569520-A
Country	US
Kind code	B2
Filing date	May 3, 2016
Priority date	May 5, 2015
Publication date	Jan 14, 2020
Grant date	Jan 14, 2020

Abstract

A method and a system to assemble a plurality of filter bags within one another using a pole and a pulling guide, and a filter bag unit which includes a plurality of assembled filter bags with creases and stitches oriented relative to each other.

First claim

The invention claimed is:

1. Method for assembly of a plurality of filter bags within each other comprising the steps of:
pulling a first filter bag on a pole until said filter bag is stretched in its length over said pole,
pulling at least a second filter bag over the first filter bag until said at least second filter bag is stretched in its length over said first filter bag and said pole, and
retracting the assembled plurality of filter bags as one unit from the pole,
wherein the filter bags to be pulled have a flat shape with two longitudinal creases, and a longitudinal stitch, and wherein the stitch of each filter bag in a unit of assembled plurality of filter bags is oriented differently with respect to the longitudinal creases, and
wherein a first open end of each of said filter bags is attached to a pulling guide before they are being pulled, said pulling guide automatically releasing each of the filter bags when they have been pulled over the pole, said pulling guide then automatically returning to its start position, ready to pull a further filter bag.

2. Method according to claim 1 further comprising the step of pulling a third filter bag over the first and second filter bag until said third filter bag is stretched in its length over said first filter bag, said second filter bag and said pole, before the step of retracting the assembled plurality of filter bags as one unit from the pole.

3. Method according to claim 1 , wherein said pulling guide comprises a claw.

4. Method according to claim 1 , wherein said pulling guide has a variable geometry adapted to connect to said first open end of each of said filter bags.

5. Method according to claim 1 , wherein said pulling guide pulls said filter bags by means of an actuator.

6. Method according to claim 1 , wherein said pole has a maximum outer diameter which is smaller than the inner diameter of any of said filter bags.

7. Method according to claim 1 , wherein said pole has a maximum outer diameter which is between 2 mm and 100 mm, preferably between 2 mm and 40 mm smaller than the inner diameter of any of said filter bags.

8. Method according to claim 1 , wherein said pole is mounted horizontally, fixed at a first end and with the second end and the length of the pole hanging freely, and wherein the second end of the pole has a circular shaped head with rounded edges.

9. Method according to claim 1 , wherein each filter bag has at least one strap for handling placed at its closed end.

10. Filter bag assembly system comprising a pole for inserting within a filter bag, a movable guide for releasable connecting to a first open end of a filter bag and pulling the filter bag, and an actuator for moving said guide along said pole, wherein said pole is at least as long as the filter bag to be pulled and wherein the maximum diameter of said pole is smaller than the inner diameter of the filter bag to be pulled, wherein the guide is adapted in height and side wards position to center the first open end of the filter bag with the pole.

11. Filter bag assembly system according to claim 10 , wherein the guide has a variable geometry adapted to connect to said first open end of a filter bag.

12. Filter bag assembly system according to claim 10 , wherein the pulling distance of the guide can be adapted to fit the filter bag length, and wherein the guide releases the filter bag when it has been pulled in its length over the pole, where after the guide returns to its starting position, ready to pull another filter bag.

13. Filter bag assembly system according to claim 10 , wherein the pulling force of the guide is variable and adapted to be set, and wherein the pulling of the guide stops if the pulling force exceeds the set value of the pulling force.

14. Filter bag assembly system according to claim 10 , wherein the system comprises a plurality of sets of poles and pulling guides.

Assignees

• Haldor Topsoe As

Inventors

• Boe Michael

Classifications

• B01D2275/10

  Multiple layers · CPC title

• B01D46/0027

  with additional separating or treating functions · CPC title

• B01D46/0001 Primary

  Making filtering elements · CPC title

• F01N3/035

  with catalytic reactors · CPC title

• B01D46/04

  Cleaning filters · CPC title