US2010081102A1PendingUtilityA1
Systems and methods for facilitating varying size coal pipes for a pulverized coal burner
Est. expirySep 30, 2028(~2.2 yrs left)· nominal 20-yr term from priority
F27D 99/0033C21C 5/5217F27D 99/0003F23D 17/00Y02P10/20F23D 1/00
50
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Claims
Abstract
Embodiments of the invention can include systems and methods for facilitating varying coal pipes for a pulverized coal burner. In one embodiment, a method for improving operation of a pulverized coal burner comprising at least one burner comprising at least one coal pipe having an inner diameter, and an outer diameter. The method can include installing at least one sleeve or at least one liner within the coal pipe between the inner and outer diameter of the coal pipe, wherein velocity of a primary air and pulverized coal mixture is increased in an upstream portion of the coal pipe. The method can also include reducing the at least one sleeve or liner, wherein velocity of the primary air and pulverized coal mixture is reduced in a downstream portion of the coal pipe.
Claims
exact text as granted — not AI-modified1 . A method for improving operation of a pulverized coal burner comprising at least one coal pipe having an inner diameter, and an outer diameter, the method comprising:
installing at least one sleeve or at least one liner within the coal pipe between the inner and outer diameter of the coal pipe, wherein velocity of a primary air and pulverized coal mixture is increased in an upstream portion of the coal pipe; and reducing the at least one sleeve or liner, wherein velocity of the primary air and pulverized coal mixture is reduced in a downstream portion of the coal pipe.
2 . The method of claim 1 , wherein the at least one sleeve or at least one liner terminates within about 10 to about 20 inches (25.4 to 50.8 cm) from a downstream end of the burner.
3 . The method of claim 1 , wherein the at least one sleeve or at least one liner comprises a ceramic, metal, or a high temperature resistant material.
4 . The method of claim 1 , wherein the at least one sleeve or at least one liner comprises at least one transition ramp or device to prevent flow recirculation.
5 . The method of claim 1 , wherein the at least one sleeve or at least one liner comprises a plurality of sleeve or liner components or sections.
6 . The method of claim 1 , wherein a thickness of the at least one sleeve or at least one liner is determined by the equations:
ds
=
do
2
·
(
V
2
-
V
1
)
+
di
2
·
V
1
V
2
Thickness
=
ds
-
di
2
wherein, ds is an outer diameter of the at least one sleeve, do is an outer diameter of the coal pipe, di is an inner diameter of the coal pipe, V 2 is a target velocity of the primary air and pulverized coal mixture within the upstream portion of the coal pipe, and V 1 is a target exit velocity of the primary air and pulverized coal mixture.
7 . The method of claim 1 , wherein the at least one sleeve or at least one liner is mounted coaxially and in close proximity to an inner diameter, of at least one coal pipe, or coaxially and in close proximity to an outer diameter, of the at least one coal pipe.
8 . An apparatus for improving operation of a pulverized coal burner comprising at least one coal pipe having an inner diameter, and an outer diameter, the apparatus comprising:
at least one sleeve or at least one liner installed within the coal pipe between the inner and outer diameter of the coal pipe, wherein velocity of a primary air and pulverized coal mixture is increased in an upstream portion of the coal pipe; and wherein the at least one sleeve or at least one liner is reduced in a downstream portion of the coal pipe to reduce the velocity of the primary air and pulverized coal mixture.
9 . The apparatus of claim 8 , wherein the at least one sleeve or at least one liner terminates within about 10 to about 20 inches (25.4 to 50.8 cm) from a downstream end of the burner.
10 . The apparatus of claim 8 , wherein the at least one sleeve or at least one liner comprises a ceramic, a metal, or a high temperature resistant material.
11 . The apparatus of claim 8 , wherein the at least one sleeve or at least one liner comprises at least one transition ramp or device to prevent flow recirculation.
12 . The apparatus of claim 8 , wherein the at least one sleeve or at least one liner comprises a plurality of sleeve or liner components or sections.
13 . The apparatus of claim 8 , wherein a thickness of the at least one sleeve or at least one liner is determined by the equations:
ds
=
do
2
·
(
V
2
-
V
1
)
+
di
2
·
V
1
V
2
Thickness
=
ds
-
di
2
wherein, ds is an outer diameter of the at least one sleeve, do is an outer diameter of the coal pipe, di is an inner diameter of the coal pipe, V 2 is a target velocity of the primary air and pulverized coal mixture within the coal pipe, and V 1 is a target exit velocity of the primary air and pulverized coal mixture.
14 . A combustion system comprising:
at least one burner starter; at least one core pipe, wherein the at least one burner starter is mounted within at least one core pipe; at least one coal pipe having an inner diameter and an outer diameter; at least one sleeve or at least one liner between the coal pipe inner diameter, and outer diameter, wherein the velocity of a primary air and pulverized coal mixture is increased in an upstream portion of the coal pipe, and wherein velocity of the primary air and pulverized coal mixture is reduced in a downstream portion of the coal pipe.
15 . The system of claim 14 , wherein the at least one sleeve or at least one liner terminates within about 10 to about 20 inches (25.4 to 50.8 cm) from a downstream end of the burner.
16 . The system of claim 14 , wherein the at least one sleeve or at least one liner comprises a ceramic, metal, or a high temperature resistant material.
17 . The system of claim 14 , wherein the at least one sleeve or at least one liner comprises at least one transition ramp or device to prevent flow recirculation.
18 . The system of claim 14 , wherein the at least one sleeve or at least one liner comprises a plurality of sleeve or liner components or sections.
19 . The system of claim 14 , wherein a thickness of the at least one sleeve or at least one liner is determined by the equations;
ds
=
do
2
·
(
V
2
-
V
1
)
+
di
2
·
V
1
V
2
Thickness
=
ds
-
di
2
wherein, ds is an outer diameter of the at least one sleeve, do is an outer diameter of the coal pipe, di is an inner diameter of the coal pipe, V 2 is a target velocity of the primary air and pulverized coal mixture within the coal pipe, and V 1 is a target exit velocity of the primary air and pulverized coal mixture at the burner.
20 . The system of claim 14 , wherein the at least one sleeve or at least one liner is mounted coaxially and in close proximity to an outer diameter, of the at least one coal pipe, or coaxially and in close proximity to an inner diameter, of the at least one coal pipe.Cited by (0)
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