Methods and systems for reducing piping vibration

Abstract

Methods and systems for a gasifier system are provided. The gasifier system includes a first substantially cylindrically shaped conduit that includes a radially inner surface, a second conduit at least partially within and substantially concentrically aligned with the first conduit, and at least one support member extending between a radially outer surface of the second conduit and the radially inner surface of the first conduit wherein the support member is positioned along a length of the second conduit to facilitate reducing a vibratory response of at least one of the first and second conduits to a flow of fluid through at least one of the first and second conduits.

1 . A gasifier system comprising:
 a first substantially cylindrically shaped conduit, said first conduit comprising a radially outer surface, a radially inner surface, and a thickness of material extending between the outer and inner surfaces, said first conduit further comprising a supply end, a discharge end and a length extending therebetween;   a second conduit at least partially within and substantially concentrically aligned with said first conduit, said second conduit comprising a radially outer surface, a radially inner surface, and a thickness of material extending between the outer and inner surfaces, said second conduit further comprising a supply end, a discharge end, and a length extending therebetween, said second conduit discharge end coupled to said first conduit discharge end; and   at least one support member extending between said radially outer surface of said second conduit and said radially inner surface of said first conduit, said support member positioned along a length of said second conduit such that a vibratory response of at least one of the first and the second conduits to a flow of fluid through at least one of the first and second conduits is facilitated being reduced.   
     
     
         2 . A system in accordance with  claim 1  wherein said at least one support member comprises a length, a width, and a thickness wherein the length is greater than the width and the width is greater than the thickness, said length of said support member aligned with the length of said second conduit. 
     
     
         3 . A system in accordance with  claim 1  wherein said support member comprises at least a first and a second cross-sectional area wherein the first cross-sectional area is less than the second cross-sectional area, said support member aligned such that the first cross-sectional area faces the flow of fluid through the first conduit. 
     
     
         4 . A system in accordance with  claim 1  further comprising a set of a plurality of support members spaced circumferentially about said outer surface of said second conduit at a single axial position along the length of the second conduit. 
     
     
         5 . A system in accordance with  claim 1  further comprising a plurality of sets of support members spaced circumferentially about said outer surface of said second conduit, the sets of support members spaced along the length of the second conduit. 
     
     
         6 . A method of assembling a gasifier feed injector comprising:
 providing a first feed pipe having a first outside diameter, the first pipe including a supply end, a discharge end, and a length extending therebetween;   providing a second feed pipe having a first inside diameter, the second pipe including a supply end, a discharge end, and a length extending therebetween;   coupling a support member to an outside surface of the first pipe at a position along the length of the first pipe that is determined to facilitate reducing a vibratory response of the first pipe to a flow of fluid through at least one of the first pipe and the second pipe, the support member sized to extend from the outside surface of the first pipe to an inside surface of the second pipe; and   inserting the first pipe into the second pipe such that the first pipe and the second pipe are substantially concentrically aligned.   
     
     
         7 . A method in accordance with  claim 6  wherein the support member includes a length, a width, and a thickness, the length being greater than the width and the width being greater than the thickness and wherein coupling a support member to an outside surface of the first pipe comprises aligning the length of the support member with the length of the first pipe. 
     
     
         8 . A method in accordance with  claim 6  wherein the support member includes a length, a width, and a thickness, the length being greater than the width and the width being greater than the thickness and wherein coupling a support member to an outside surface of the first pipe comprises aligning the length of the support member normally with the outer surface of the first pipe. 
     
     
         9 . A method in accordance with  claim 6  wherein coupling a support member to an outside surface of the first pipe comprises shaping the support member to a profile that facilitates laminar flow of the flow of fluid through the second pipe. 
     
     
         10 . A method in accordance with  claim 6  wherein coupling a support member to an outside surface of the first pipe comprises shaping the support member to a profile that facilitates turbulent flow of the flow of fluid through the second pipe. 
     
     
         11 . A method in accordance with  claim 6  wherein inserting the first pipe into the second pipe comprises slidingly engaging a distal end of the support member to the first inside diameter such that the support member remains wedged between the first pipe and the second pipe when fluid is flowing in at least one of the first pipe and the second pipe. 
     
     
         12 . A method in accordance with  claim 6  further comprising determining a position of the support members that facilitates reducing vibration of at least one of the first and the second pipe. 
     
     
         13 . A method in accordance with  claim 6  further comprising determining a position of the support members that facilitates increasing the lowest natural frequency of the first pipe. 
     
     
         14 . A method in accordance with  claim 6  further comprising determining a position and profile of the support members that facilitates reducing an irregularity of flow through the second pipe. 
     
     
         15 . A method in accordance with  claim 6  determining a position of the support members that facilitates increasing the lowest natural frequency of the first pipe from approximately 27 Hz to 107 Hz. 
     
     
         16 . A gasification system comprising:
 a pressure vessel for partially oxidizing a fuel;   a feed injector configured to inject a fuel into the pressure vessel;   wherein the feed injector further comprises:   a first substantially cylindrically shaped first conduit, said first conduit comprising a radially outer surface, a radially inner surface, and a thickness of material extending between the outer and inner surfaces, said first conduit further comprising a supply end, a discharge end and a length extending therebetween;   a second conduit at least partially within and substantially concentrically aligned with said first conduit, said second conduit comprising a radially outer surface, a radially inner surface, and a thickness of material extending between the outer and inner surfaces, said second conduit further comprising a supply end, a discharge end, and a length extending therebetween, said second conduit discharge end coupled to said first conduit discharge end; and   at least one support member extending between said radially outer surface of said second conduit and said radially inner surface of said first conduit, said support member positioned along a length of said second conduit to facilitate reducing a vibratory response of the second conduit to a flow of fluid through at least one of the first and second conduits.   
     
     
         17 . A system in accordance with  claim 16  wherein said at least one support member comprises a length, a width, and a thickness wherein the length is greater than the width and the width is greater than the thickness, said length of said support member aligned with the length of said first conduit. 
     
     
         18 . A system in accordance with  claim 16  wherein said support member comprises at least a first and a second cross-sectional area wherein the first cross-sectional area is less than the second cross-sectional area, said support member aligned such that the first cross-sectional area faces the flow of fluid through the first conduit. 
     
     
         19 . A system in accordance with  claim 16  further comprising a set of a plurality of support members spaced circumferentially about said outer surface of said second conduit at a single position along the length of the second conduit. 
     
     
         20 . A system in accordance with  claim 16  further comprising a plurality of sets of support members spaced circumferentially about said outer surface of said second conduit, the sets of support members spaced along the length of the second conduit.