STEAM BYPASS CONDUIT

Abstract

An arrangement for making a flow uniform, having a housing, which is designed to limit the flow, wherein the housing has holes through which the flow flows, as a jet, into a space outside the housing, wherein the holes are spaced apart in such a way that it is not possible for jets coming from two adjacent holes to merge.

Claims

1. A bypass steam system for introducing a flow of high-energy steam into a condenser, comprising: an arrangement making the flow uniform, wherein the arrangement has a housing, which is designed to limit the flow, wherein the housing has holes, through which the flow flows as a jet into a space outside the housing, wherein the spacing D of the holes is such that, at a distance A from the housing, it is not possible for jets coming from two adjacent holes to merge, where D=A, wherein the spacing D of two adjacent hole centers is at least D=50 mm.

2. The arrangement as claimed in claim 1, wherein the arrangement is a perforated basket.

3. The arrangement as claimed in claim 1, when the arrangement is a dump tube.

4. The arrangement as claimed in claim 1, wherein the holes are formed as a hole differing from a circular cross section.

5. The arrangement as claimed in claim 4, wherein the ratio of hole circumference to hole cross section is maximized.

6. The arrangement as claimed in claim 4, wherein the hole is formed in the shape of a cloverleaf.

7. The arrangement as claimed in claim 1, wherein the holes are designed in the shape of a Laval nozzle.

8. A condenser comprising: an arrangement as claimed in claim 1.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In the figures:

[0026] FIG. 1 shows a perspective illustration of a part of a condenser.

[0027] FIG. 2 shows an enlarged illustration of a part from FIG. 1.

[0028] FIG. 3 shows a schematic illustration of an alternative embodiment of the arrangement.

[0029] FIG. 4 shows an enlarged illustration of an arrangement according to the invention.

[0030] FIG. 5 shows a perspective illustration of a part of the arrangement.

[0031] FIG. 6 shows a perspective illustration of an alternative embodiment of a part of the arrangement.

[0032] FIG. 7 shows a cross-sectional view of a part of the arrangement.

[0033] FIG. 8 shows a plan view of a part of the arrangement.

DETAILED DESCRIPTION OF INVENTION

[0034] FIG. 1 shows a condenser 1. The condenser 1 comprises a condenser housing 2 and condenser pipes 3. A cooling medium flows through the condenser pipes 3. On the surface of the condenser pipes 3, the steam supplied in the condenser housing 2 from a low-pressure part turbine condenses to form water. The supply of the steam from the low-pressure part turbine into the condenser 1 is not illustrated in detail in FIG. 1.

[0035] In bypass operation, steam with high energy flows via a bypass steam system via a bypass line 4 through the condenser housing 2 in an arrangement 5 which, in this case, is a perforated basket 6. Reinforcing elements 7 are arranged within the condenser 1. The arrangement 5 comprises a housing 8 which is designed to limit the flow from the bypass line 4.

[0036] The housing 8 has holes 9. The arrangement 5 and the housing 8 are formed in such a way that the steam from the bypass line 4 can flow into the condenser interior only through the holes 9, and it is not possible for the steam to flow out between the housing 8 and condenser housing 2.

[0037] FIG. 3 shows an alternative embodiment of the arrangement 5. In the embodiment illustrated in FIG. 3, the arrangement 5 is formed as a dump tube 10. The dump tube 10 likewise has a housing 8 in which holes 9 are arranged.

[0038] FIG. 6 shows an enlarged illustration of a part of the arrangement, which can be formed as a perforated basket 6 or as a dump tube 10. In FIG. 6, it is possible to see a part of the housing 8. Further, multiple holes 9 are shown. The hole centers 13 of two adjacent holes 9 have a spacing 11 from one another. This spacing 11 is such that a jet flowing through the hole 9 does not merge with another. The spacing 11 should therefore be at least 50 mm.

[0039] FIG. 5 shows an alternative embodiment of a hole 9a. The hole 9a is designed as a cloverleaf. The ratio of hole circumference and hole cross section is optimal.

[0040] FIG. 7 shows an embodiment of a hole 9. Here, the hole is designed as a Laval nozzle. The flow 12 takes place from left to right.

[0041] FIG. 8 shows an illustration of the spacing 11 of two adjacent holes 9. The hole centre 13 is identified by a cross. For reasons of clarity, only four hole centers are provided with the designation 13.