System and method for filtering a gas-solids mixture

Patent metadata

Field	Value
Publication number	US-10293295-B2
Application number	US-201516062697-A
Country	US
Kind code	B2
Filing date	Dec 23, 2015
Priority date	Dec 23, 2015
Publication date	May 21, 2019
Grant date	May 21, 2019

Abstract

A system for filtering a gas-solids mixture, comprises: a housing; a separating body dividing the housing in a raw gas chamber and a clean gas chamber, the raw gas chamber being accessible via an inlet for the gas-solids mixture and the clean gas chamber comprising an outlet for discharging a cleaned gas; a number of filter elements suspended from the separating body; lower ends of the filter elements being connected to a support grid, the support grid comprising a number of arms; one or more cleaning elements provided on the arms of the support grid for cleaning thereof.

First claim

The invention claimed is:

1. System for filtering a gas-solids mixture, the system comprising:
a housing;
a separating body dividing the housing into a raw gas section and a clean gas section, the raw gas section being accessible via an inlet for the gas-solids mixture and the clean gas section comprising an outlet for discharging a cleaned gas;
a number of filter elements suspended from the separating body;
a support grid, the support grid comprising a number of arms interconnected at nodes, the lower ends of the filter elements being connected to the support grid;
one or more cleaning elements movably arranged on the arms of the support grid between adjacent nodes for cleaning of the arms.

2. The system of claim 1 , the cleaning elements being adapted to vibrate to remove accumulation of solids.

3. The system of claim 1 , the cleaning elements comprising helical springs wound around the arms of the support grid.

4. The system of claim 3 , the helical springs being round, square or rectangular in cross section.

5. The system of claim 3 , subsequent windings of the helical springs having an increasing diameter.

6. The system of claim 1 , comprising at least one impact device for providing a mechanical and/or hydraulic impulse to the filter elements for the removal of accumulated solids from a surface of the filter elements, said impulse being adapted to provide excitation energy causing vibration of the cleaning elements.

7. The system of claim 6 , comprising a back-pulsing system for providing a gas pulse through the filter elements for cleaning thereof, said gas pulse being adapted to provide the hydraulic impulse.

8. The system of claim 1 , the cleaning elements being adapted to limit accumulation of solids on the support grid to a maximum threshold level, by tuning one or more parameters selected from the group of: flow rate of the gas-solids mixture; energy of the mechanical and/or hydraulic impulse; vibrations in the support grid resulting from the impulse; frequency of repeating the mechanical and/or hydraulic impulse; number of mechanical and/or hydraulic impulses at a time; and time period of the mechanical and/or hydraulic impulse.

9. The system of claim 1 , the cleaning elements comprising a fixation section for fixating the respective cleaning element with respect to the support grid, and one or more vibration extensions connected to the fixation section for vibrating with respect to the support grid.

10. The system of claim 9 , the vibration extensions comprising helically wound sections.

11. The system of claim 10 , the helically wound sections having an increasing diameter in a direction away from the fixation section.

12. The system of claim 10 , the fixation section comprising a band.

13. The system of claim 12 , the vibration extensions comprising elongate vibration elements, having a first end connected to the band.

14. The system of claim 13 , an end of the elongate vibration elements being provided with a weight.

15. The system of claim 1 wherein the cleaning elements comprise a wire and are adapted to vibrate to remove accumulations of solids.

16. Method for filtering a gas mixture, the method comprising the steps of:
providing a filter system, comprising a housing, a support grid fixedly arranged in the housing, the support grid comprising a number of arms interconnected at nodes, a number of filter elements arranged on the nodes of the support structure, and cleaning elements movably arranged on the arms of the support grid between adjacent nodes; and
cleaning of the support grid by vibration and movement of the cleaning elements.

17. The method of claim 16 , comprising a step of inducing the vibration and movement of the cleaning elements by dynamic fluid forces of the gas mixture.

18. The method of claim 16 , comprising a step of inducing the vibration and movement of the cleaning elements by a gas pulse through the filter elements for cleaning thereof, said gas pulse being adapted to activate the cleaning elements by kinetic energy.

19. The method of claim 16 wherein the cleaning elements comprise a wire and are adapted to vibrate to remove accumulation of solids.

Assignees

• Air Prod & Chem

Inventors

• Wang Guoqiang
• Wong Chii-King
• Zalman Lucien

Classifications

• B01D46/0071

  Operations & Transport · mapped topic

• B01D2267/30

  Same type of filters · CPC title

• B01D46/0068

  Operations & Transport · mapped topic

• B01D2267/60

  Vertical arrangement · CPC title

• B01D2265/06

  Details of supporting structures for filtering material, e.g. cores · CPC title