Filtering structure for inlet of high-pressure heater of steam turbine generator unit
By installing upper and lower filter screens at the inlet of the high-pressure heater of the steam turbine generator set, the problem of damage and blockage of the heat exchange tube bundle by high-temperature and high-pressure steam was solved, and the stability of steam circulation and power generation was achieved.
Patent Information
- Application Number
- CN202423061882.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-12-12
AI Technical Summary
The high-temperature and high-pressure steam at the inlet of the high-pressure heater of existing steam turbine generator sets can easily cause damage and blockage of the heat exchange tube bundle, affecting steam circulation and power generation.
A filtration structure comprising upper and lower filter screens was designed to filter high-temperature and high-pressure steam, reduce thermal stress, divert steam, and prevent debris from clogging the heat exchanger tube bundle.
It effectively reduces the thermal stress of high-temperature and high-pressure steam, prevents damage to the heat exchanger tube bundle, and avoids blockage by high-pressure debris, thus ensuring steam circulation and the power generation of the generator set.
Smart Images
Figure CN223628306U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to steam turbine power generation technical field, concretely to a filter structure for steam turbine generator unit high pressure heater import. BACKGROUND
[0002] Most of the existing power plants utilize the high-temperature steam generated by the boiler to make the steam turbine generator unit run to generate electricity, and the exhaust steam (300 DEG C) after the work of the steam turbine generator unit is sequentially treated by the condenser, the condensate pump, the low-pressure heater, the deaerator, the feedwater pump and the high-pressure heater and then returned to the boiler for recycling. Among them, the high-temperature and high-pressure steam needs to enter the multiple heat exchange tube bundles from the high-pressure heater superheating section steam inlet, and due to the large thermal stress of the high-temperature and high-pressure steam and the inclusion of some high-pressure impurities, the large thermal stress is easy to damage the heat exchange tube bundle, and the high-pressure impurities are easy to block the heat exchange tube bundle, which not only affects the steam circulation of the steam turbine generator unit, but also affects the power generation capacity of the steam turbine generator unit. SUMMARY
[0003] The utility model discloses to the above -mentioned insufficient, provide a filter structure for steam turbine generator unit high pressure heater import, can reduce the thermal stress in high-temperature and high-pressure steam, avoid the heat exchange tube bundle damage caused by the thermal stress is big, can also filter high-temperature and high-pressure steam, avoid the high-pressure impurities in high-temperature and high-pressure steam and block the heat exchange tube bundle, guarantee the steam circulation and power generation capacity of steam turbine generator unit.
[0004] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:
[0005] A filter structure for steam turbine generator unit high pressure heater import, including the bottom shell of one end sealed connection in high pressure heater, detachable connection on the bottom shell on the upper shell, the connecting port of intercommunication upper shell interior, the high-temperature and high-pressure steam inlet pipe of bottom end sealed connection connecting port, one end goes into the multiple heat exchange tubes of bottom shell, the upper layer filter screen and lower layer filter screen of upper and lower symmetry are provided with in the upper shell, and the upper layer filter screen and lower layer filter screen are opposite to the connecting port setting.
[0006] Further, the upper layer filter screen and lower layer filter screen all include a net clamp, a filter screen body installed in the net clamp, the outer edge part of the filter screen body is fixed on the inner wall of the upper shell, the middle part of the filter screen body gradually rises upward, and the rising position is opposite to the connecting port.
[0007] Further, a gap is left between the upper layer filter screen and the lower layer filter screen.
[0008] Further, the mesh of the upper layer filter screen is larger than the mesh of the lower layer filter screen.
[0009] Further, the upper shell is provided with an annular protrusion, the bottom shell is provided with an annular groove opposite to the annular protrusion, and a sealing ring is arranged in the annular groove, when the upper shell and the bottom shell are fastened by bolts, the annular protrusion abuts the sealing ring in the annular groove.
[0010] The utility model discloses the beneficial effect is:
[0011] In actual application, when using, high temperature and high pressure steam enters the upper shell from the high temperature and high pressure steam inlet pipe, and the high pressure sundries in the high temperature and high pressure steam are filtered through the upper filter screen and the lower filter screen, and the high temperature and high pressure steam with high thermal stress is branched, so that the thermal stress is reduced and dispersed and then enters the heat exchange pipe, the utility model can reduce the thermal stress of high temperature and high pressure steam, avoid the damage of heat exchange tube bundle caused by high thermal stress, and filter the high temperature and high pressure steam, avoid the high pressure sundries in the high temperature and high pressure steam from blocking the heat exchange tube bundle, and guarantee the steam circulation and power generation capacity of the steam turbine generator set. BRIEF DESCRIPTION OF DRAWINGS
[0012] Figure 1 It is the whole structure schematic diagram of the utility model;
[0013] Fig. 1 is the overall structure schematic diagram of the utility model, and the reference signs are as follows: bottom shell 1, upper shell 2, high temperature and high pressure steam inlet pipe 3, heat exchange pipe 4, upper filter screen 51, lower filter screen 52, net clamp 531, filter screen body 532, supply 533, sealing ring 61, bolt 62. DETAILED DESCRIPTION
[0014] As shown in Fig. Figure 1 A filtering structure for the inlet of high pressure heater of steam turbine generator set, which comprises a bottom shell 1 sealingly connected to the high pressure heater at one end, an upper shell 2 detachably connected to the bottom shell 1, a connecting port communicating with the inside of the upper shell 2, a high temperature and high pressure steam inlet pipe 3 sealingly connected to the connecting port at the bottom end, and a plurality of heat exchange pipes 4 extending into the bottom shell 1 at one end, wherein the upper shell 2 is symmetrically provided with an upper filter screen 51 and a lower filter screen 52, and the upper filter screen 51 and the lower filter screen 52 are arranged opposite to the connecting port.
[0015] When using, high temperature and high pressure steam enters the upper shell 2 from the high temperature and high pressure steam inlet pipe 3, and the high pressure sundries in the high temperature and high pressure steam are filtered through the upper filter screen 51 and the lower filter screen 52, and the high temperature and high pressure steam with high thermal stress is branched, so that the thermal stress is reduced and dispersed and then enters the heat exchange pipe 4, the utility model can reduce the thermal stress of high temperature and high pressure steam, avoid the damage of heat exchange tube bundle caused by high thermal stress, and filter the high temperature and high pressure steam, avoid the high pressure sundries in the high temperature and high pressure steam from blocking the heat exchange tube bundle, and guarantee the steam circulation and power generation capacity of the steam turbine generator set.
[0016] As shown in Fig. Figure 1As shown in the figure, the upper filter screen 51 and the lower filter screen 52 each comprise a net hoop 531, a filter screen body 532 installed in the net hoop 531, an outer edge portion of the filter screen body 532 fixed on the inner side wall of the upper shell 2, and a middle portion of the filter screen body 532 gradually upwardly provided with a supply 533, which is opposite to the connecting port; in this embodiment, the high-temperature and high-pressure steam output from the high-temperature and high-pressure steam inlet pipe 3 first impacts on the supply 533, and then gradually filters along the filter screen body and enters the heat exchange pipe 4 in the bottom shell 1, so that the filtering effect is better.
[0017] As shown in the figure, Figure 1 a gap is left between the upper filter screen 51 and the lower filter screen 52; in this embodiment, when the gap is left between the upper filter screen 51 and the lower filter screen 52, the flow speed of the hot steam is faster.
[0018] As shown in the figure, Figure 1 the mesh of the upper filter screen 51 is larger than that of the lower filter screen 52; in this embodiment, when the mesh of the upper filter screen 51 and that of the lower filter screen 52, the large-particle high-temperature sundries are less likely to block the lower filter screen 52.
[0019] As shown in the figure, Figure 1 the upper shell 2 is provided with an annular protrusion, the bottom shell 1 is provided with an annular groove opposite to the annular protrusion, a sealing ring 61 is arranged in the annular groove, and when the upper shell 2 and the bottom shell 1 are tightened by the bolt 62, the annular protrusion abuts the sealing ring 61 in the annular groove; in this embodiment, the upper shell 2 and the bottom shell 1 are tightened by the bolt 62, so that it is more convenient to clean the upper filter screen 51 and the lower filter screen 52; the annular protrusion abutting the sealing ring 61 in the annular groove can seal the upper shell 2 and the bottom shell 1, so as to prevent the high-temperature steam from leaking out.
[0020] The specific embodiments described herein are merely illustrative of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, without departing from the scope defined by the present application.
Claims
1. A filter arrangement for the inlet of a high pressure heater of a steam turbine generator unit, characterized by: The utility model relates to a high-temperature high-pressure steam filter, which comprises a bottom shell (1) sealedly connected to a high-pressure heater at one end, an upper shell (2) detachably connected to the bottom shell (1), a connecting port communicating the inside of the upper shell (2), a high-temperature high-pressure steam inlet pipe (3) sealingly connected to the connecting port at the bottom end, a plurality of heat exchange pipes (4) extending into the bottom shell (1) at one end, and upper and lower filter screens (51 and 52) symmetrically arranged in the upper shell (2), wherein the upper filter screen (51) and the lower filter screen (52) are arranged opposite to the connecting port.
2. The filtering structure for the high-pressure heater inlet of a steam turbine generator unit according to claim 1, characterized in that, The upper filter screen (51) and the lower filter screen (52) each comprise a screen hoop (531) and a filter screen body (532) installed in the screen hoop (531), wherein the outer edge of the filter screen body (532) is fixed to the inner side wall of the upper shell (2), the middle part of the filter screen body (532) gradually rises to a supply part (533), and the supply part (533) is arranged opposite to the connecting port.
3. The filtering structure for the high-pressure heater inlet of a steam turbine generator unit according to claim 1, characterized in that, A gap is left between the upper filter screen (51) and the lower filter screen (52).
4. The filtering structure for the high pressure heater inlet of a steam turbine generator unit according to claim 1, characterized in that, The mesh of the upper filter screen (51) is larger than that of the lower filter screen (52).
5. The filtering structure for the high pressure heater inlet of a steam turbine generator unit according to claim 1, characterized in that, An annular protrusion is arranged on the upper shell (2), an annular groove opposite to the annular protrusion is arranged on the bottom shell (1), a sealing ring (61) is arranged in the annular groove, and when the upper shell (2) and the bottom shell (1) are tightened by bolts (62), the annular protrusion tightly presses the sealing ring (61) in the annular groove.