Assembly for fossil fuel distribution

Patent metadata

Field	Value
Publication number	US-9657944-B2
Application number	US-201113821974-A
Country	US
Kind code	B2
Filing date	Aug 29, 2011
Priority date	Sep 9, 2010
Publication date	May 23, 2017
Grant date	May 23, 2017

Abstract

The present invention relates to the field of fossil fuel combustion arrangement. It relates in particular to a fuel distribution assembly for equal and homogenous pulverized fuel distribution in pulverized fuel conduits throughout. It also relates to a system for providing an equal and homogenous pulverized fuel distribution.

First claim

We claim:

1. A system for pulverized fuel distribution from a mill to a boiler comprising:
a heater that generates a primary air;
a mill that pulverizes the coal into pulverized fuel, the pulverized fuel being supplied with the help of primary air through a main pulverized fuel conduit;
an assembly that provides pulverized fuel into the main pulverized fuel conduit, the assembly having:
an outer tube;
an inner tube disposed within the outer tube along a common central axis;
a plurality of deflectors disposed circumferentially about the central axis between the inner tube and the outer tube to provide resistance to the pulverized fuel flow in the outer tube; and
at least one partition plate disposed within the inner tube to provide resistance to the pulverized fuel flow in the inner tube, the at least one partition plate extending substantially entirely across the inner tube through the common central axis;

a distributor that furcates the main pulverized fuel conduit into smaller pulverized fuel ducts, the smaller pulverized fuel ducts feeding homogenous pulverized fuel to the burners of a boiler.

2. The system for pulverized fuel distribution according to claim 1 , wherein the assembly is embedded inside the main pulverized fuel conduit.

3. The system for pulverized fuel distribution according to claim 1 , wherein the assembly is installed between the main conduit and the distributor.

4. The system according to claim 1 , wherein a portion of the deflectors direct the pulverized fuel towards the central axis and a portion of the deflectors direct the pulverized fuel away from the central axis.

5. The system according to claim 1 , wherein the deflectors in alternating manner direct the pulverized fuel towards the central axis and away from the central axis.

6. The system of claim 1 , wherein the pulverized fuel flow passing through the outer and the inner tube provides a homogenous pulverized fuel flow to a main pulverized fuel conduit prior to the furcation and distribution of the homogeneous pulverized fuel to the boiler.

7. The system of claim 1 , wherein each deflector comprises a first and a second tapered side walls attached to a base structure, the deflector is positioned such that the base structure forms an passage for a zig-zag movement of the pulverized fuel.

8. The system according to claim 1 , wherein the at least one partition plate is a pair of partition plates.

9. The system according to claim 1 , wherein the pair of partition plates are orthogonal to each other.

10. The system according to claim 8 , wherein at least one of the partition plates has a flat surface.

11. The system according to claim 7 , wherein the base structures are, in an alternating manner, attached to an inner surface of the outer tube and to an outer surface of the inner tube.

12. The system according to claim 7 , wherein the base structure is angled with respect to the central axis of the tube.

13. The system according to claim 7 wherein first and the second tapered sidewalls are angled alternatively towards and away respectively with respect to the central axis of the tube.

14. The system according to claim 1 , wherein the at least one partition plate is extending in a radial direction from the central axis of the tube.

Assignees

• Debashis Dey
• Banerjee Sauren
• Krishnendu Aditya
• General Electric Technology Gmbh

Inventors

• Debashis Dey
• Banerjee Sauren
• Krishnendu Aditya

Classifications

• F23K1/00

  Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus · CPC title

• F23K2203/105

  Flow splitting devices to feed a plurality of burners · CPC title

• F23K2201/101

  to a specific particle size · CPC title

• F23K2203/201

  using pneumatic means · CPC title

• F23K3/02 Primary

  Pneumatic feeding arrangements, i.e. by air blast · CPC title