Fluid handling – Processes – With control of flow by a condition or characteristic of a...
Reexamination Certificate
2002-01-04
2004-07-06
Hepperle, Stephen M. (Department: 3753)
Fluid handling
Processes
With control of flow by a condition or characteristic of a...
C137S605000
Reexamination Certificate
active
06758232
ABSTRACT:
TECHNICAL FIELD OF THE INVENTION
The present invention concerns a steam pressure reducing and conditioning system.
RELATED APPLICATION
The present invention includes common subject matter disclosed in U.S. application Ser. No. 10/038,985, entitled Steam Pressure Reducing and Conditioning Valve by the same inventor Hiroyuki Higuchi filed concurrently on Jan. 04, 2002, the disclosure of which is incorporated herein by reference.
BACKGROUND OF THE INVENTION
Referring to Prior Art
FIG. 3
, it has been known to have a steam pressure reducing and conditioning system comprising a steam source
24
(such as boiler) for generating superheated steam S, a pressure reducing and conditioning valve
21
for depressurizing and desuperheating steam S generated by this steam source
24
, and a discharge pipe
23
connected to an outlet of steam pressure reducing and conditioning valve
21
, and connected to a steam work section
22
, downstream of valve
21
.
As illustrated in Prior Art
FIG. 3
, steam pressure and conditioning valve
21
receives superheated and pressurized steam S inflowing in inlet
21
a
. Steam S is desuperheated and depressurized by passing steam S valve
21
and injecting subcooled water mist W (not shown) from one or more nozzles
25
in the lower portion of valve
21
.
The desuperheated and depressurized steam S
1
, discharged from the valve
21
and the subcooled water mist W injected in valve
21
, flow into the discharge pipe
23
and are conveyed to the steam work section
22
. A portion of discharge pipe
23
is arranged horizontally
23
a
. Some of the subcooled water mist W condenses and clings to the discharge pipe at
23
a
and flows along the bottom of the horizontal section. Steam S
1
flows past these areas of condensation creating temperature differentials in the interior surface of the pipe
23
.
Consequently, the pipe
23
deforms (bends upward) and possibly breaks due to expansion and stress due to the temperature difference in horizontal section of pipe
23
, and moreover, the condensed moisture W
1
, flowing at the bottom of the pipe
23
is enrolled up by the high speed flow of steam S
1
(jumping phenomenon). The jumping phenomenon erroneous temperature measurements in temperature sensors in the pipe
23
for detecting the heat of the steam S
1
.
It is an object of the present invention to provide a steam pressure reducing and conditioning system that can solve the aforementioned problems.
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Hepperle Stephen M.
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