CN218882300U - Device for regulating steam turbine shaft seal steam desuperheating water - Google Patents
Device for regulating steam turbine shaft seal steam desuperheating water Download PDFInfo
- Publication number
- CN218882300U CN218882300U CN202223134720.6U CN202223134720U CN218882300U CN 218882300 U CN218882300 U CN 218882300U CN 202223134720 U CN202223134720 U CN 202223134720U CN 218882300 U CN218882300 U CN 218882300U
- Authority
- CN
- China
- Prior art keywords
- shaft seal
- water
- desuperheating
- pipeline
- supply pipeline
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The utility model discloses a device that is used for steam turbine shaft seal vapour desuperheating water to adjust relates to the steam turbine field, the technical scheme of the utility model include that No. 6 low adds female pipe of water, little shaft seal steam supply pipeline, big shaft seal steam supply pipeline and condensate pipe, no. 6 low adds female pipe of water and No. 6 low pressure feed water heaters intercommunication, condensate pipe communicates respectively to little shaft seal steam supply pipeline with big shaft seal steam supply pipeline, condensate pipe's water outlet end with be provided with the desuperheating pipeline between the female pipe of No. 6 low addition water, the desuperheating pipeline is provided with first flow control valve, condensate pipe's the end of intaking is provided with the second flow control valve. The temperature reduction requirement of matching operation can be better met, the adjusting performance of the flow adjusting valve is improved, and therefore the shaft seal steam temperature effect is optimal.
Description
Technical Field
The utility model relates to a steam turbine field especially relates to a device that is used for steam turbine shaft seal vapour desuperheating water to adjust.
Background
The steam turbine large and small shaft seal steam temperature reduction water is supplied for a condensate pump outlet main pipe, is respectively regulated by respective regulating valves, and is sprayed into a shaft seal steam main pipe for temperature reduction and pressure reduction after being atomized by a nozzle. In the practical application process, the following are found: the adjustment linearity of the desuperheating water is poor, and the adjustment of the steam temperature of the shaft seal is slow due to the influence of the desuperheating water parameters and the atomizing nozzle, so that the steam temperature and the pressure of the shaft seal cannot be effectively controlled.
The reasons for the difficulty in adjusting the temperature of the shaft seal steam are mainly as follows:
1. the shaft seal steam attemperation water pressure is high (about 1.2 MPa), the temperature is low (about 30 ℃), so that the attemperation water quantity required by the shaft seal steam in the attemperation process is very small, the on-site attemperation water adjusting door is large in flow adjustment span, and particularly when the flow is extremely small, the sensitivity of the adjusting door cannot meet the on-site production requirement;
2. in order to adapt to the minimum flow regulation of the on-site temperature-reducing water regulating valve, the opening of the shaft seal steam regulating valve is forced to be improved, and the pressure and the flow of the shaft seal steam are increased, so that the temperature-reducing water under the minimum opening of the regulating valve is matched, the pressure of the shaft seal steam is higher, and the leakage of the shaft seal steam is increased;
3. because the restriction of shaft seal vapour desuperheating discharge, atomizing nozzle is ordinary type no pressure adjustment atomizing nozzle, leads to desuperheating water atomizing effect relatively poor when the low discharge, and the desuperheating water can't mix with the shaft seal vapour fast to lead to that the sensitivity of desuperheating effect and real-time are relatively poor.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a device that is used for steam turbine shaft seal vapour desuperheating water to adjust, satisfying that can be better matches the operation desuperheating requirement, has increased the regulation performance of flow control valve to realize that bearing seal vapour temperature effect reaches the best, overall structure is simple, and the cost is lower, and the suitability is strong, has effectively avoided bearing seal vapour temperature too high and the low potential safety hazard of bringing of crossing.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a device for steam turbine shaft seal vapour desuperheating water is adjusted, includes No. 6 low female pipes that add, little shaft seal steam supply pipeline, big machine bearing seal steam supply pipeline and condensate pipe, no. 6 low female pipes that add go out and No. 6 low pressure feed water heaters intercommunication, condensate pipe communicates respectively to little shaft seal steam supply pipeline and big machine bearing seal steam supply pipeline, be provided with the desuperheating pipeline between condensate pipe's the outlet end and No. 6 low female pipes that add, the desuperheating pipeline is provided with first flow control valve, condensate pipe's the end of intaking is provided with the second flow control valve.
Can optimize desuperheating water source parameter, improve temperature regulation sensitivity, improve the initial parameter of desuperheating water for absorb under the same thermal prerequisite, increase desuperheating water flow, thereby avoid the minimum flow district of desuperheating water, increase desuperheating water flow control valve adaptation interval is with the flow span demand that adapts to the scene, promotes the regulation performance of governing valve.
Preferably, a large shaft seal branch pipe and a small shaft seal branch pipe are respectively arranged at the water outlet end of the condensed water pipeline, the large shaft seal branch pipe is communicated to the large shaft seal steam supply pipeline, and the small shaft seal branch pipe is communicated to the small shaft seal steam supply pipeline. So as to better provide the temperature-reducing water for the steam supply pipeline of the large shaft seal and the steam supply pipeline of the small shaft seal.
Preferably, the large engine shaft seal branch pipe is provided with a third flow regulating valve. So as to control the flow of the large shaft seal branch pipe.
Preferably, the third flow rate adjustment valve is an electric adjustment valve. So as to automatically control the flow of the shaft seal branch pipe of the large engine.
Preferably, the small shaft seal branch pipe is provided with a fourth flow regulating valve. So as to control the flow of the small shaft seal branch pipe.
Preferably, the fourth flow control valve is an electric control valve. So as to automatically control the flow of the small shaft seal branch pipe.
Preferably, the first flow regulating valve and/or the second flow regulating valve are manual regulating valves. So as to more autonomously control the flow of the desuperheating pipeline and the condensed water pipeline.
Preferably, the small shaft seal steam supply pipeline is provided with an atomizing nozzle. The temperature regulation effect is improved.
Preferably, the large engine shaft seal steam supply pipeline is provided with an atomizing nozzle. The effect of temperature regulation is improved.
The utility model has the advantages that:
this scheme can be better satisfy the requirement of matching the operation desuperheating, increased flow control valve's regulation performance, promoted the atomization effect that desuperheating water enters into the bearing seal vapour through the nozzle to realize that bearing seal vapour temperature effect reaches the best, overall structure is simple, and the cost is lower, and the suitability is strong, has effectively avoided bearing seal vapour temperature too high and has crossed the potential safety hazard that brings excessively, has ensured the safe and reliable operation of unit.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only one of the drawings of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of an embodiment of the present invention;
wherein, the No. 1 and No. 6 low water outlet main pipes are added; 2. a small machine shaft seal steam supply pipeline; 3. a large shaft seal steam supply pipeline; 4. a condensate pipeline; 5. number 6 low pressure heater; 6. a desuperheating pipeline; 7. a first flow regulating valve; 8. sealing the branch pipe by the small machine shaft; 9. a third flow rate regulating valve; 10. a fourth flow regulating valve; 11. a large machine shaft seal branch pipe; 12. an atomizing nozzle; 13. the shaft seal is used for a steam station; 14. a second flow regulating valve.
Detailed Description
In order to deepen the understanding of the present invention, the present invention will be described in further detail with reference to the attached drawings and the embodiment, which is only used to explain the present invention, and is not limited to the protection scope of the present invention.
Examples
As shown in fig. 1, a device for adjusting steam turbine shaft seal steam desuperheating water comprises a number 6 low-pressure water outlet main pipe 1, a small shaft seal steam supply pipeline 2, a large shaft seal steam supply pipeline 3 and a condensed water pipeline 4, wherein the number 6 low-pressure water outlet main pipe 1 is communicated with a number 6 low-pressure heater 5, the condensed water pipeline 4 is communicated to the small shaft seal steam supply pipeline 2 and the large shaft seal steam supply pipeline 3 respectively, a desuperheating pipeline 6 is arranged between a water outlet end of the condensed water pipeline 4 and the number 6 low-pressure water outlet main pipe 1, the desuperheating pipeline 6 is provided with a first flow regulating valve 7, and a water inlet end of the condensed water pipeline 4 is provided with a second flow regulating valve 14.
This embodiment can optimize desuperheating water source parameter, improves temperature regulation sensitivity, improves the initial parameter of desuperheating water for absorb under the same thermal prerequisite, increase desuperheating water flow, thereby avoid the minimum flow district of desuperheating water, increase desuperheating water flow control valve adaptation interval is with the flow span demand that adapts to the scene, promotes the regulation performance of governing valve.
The water outlet end of the condensed water pipeline 4 is respectively provided with a large machine shaft seal branch pipe 11 and a small machine shaft seal branch pipe 8, the large machine shaft seal branch pipe 11 is communicated to the large machine shaft seal steam supply pipeline 3, and the small machine shaft seal branch pipe 8 is communicated to the small machine shaft seal steam supply pipeline 2. So as to better provide the desuperheating water for the steam supply pipeline 3 of the large shaft seal and the steam supply pipeline 2 of the small shaft seal.
The large shaft seal branch pipe 11 is provided with a third flow regulating valve 9. So as to control the flow of the large machine shaft seal branch pipe 11. The third flow rate adjusting valve 9 is an electric adjusting valve. So as to automatically control the flow of the large machine shaft seal branch pipe 11.
The small machine shaft seal branch pipe 8 is provided with a fourth flow regulating valve 10. In order to control the flow of the small shaft seal branch 8. The fourth flow control valve 10 is an electric control valve. So as to automatically control the flow of the small shaft seal branch pipe 8. Preferably, remote control of the operation of the electrically operated regulator valve may be employed.
The first flow rate adjustment valve 7 and the second flow rate adjustment valve 14 are manual adjustment valves. So as to more autonomously control the flow of the desuperheating conduit 6 and the condensate conduit 4.
The small shaft seal steam supply pipeline 2 is provided with an atomizing nozzle 12, and the large shaft seal steam supply pipeline 3 is provided with an atomizing nozzle 12. The effect of temperature regulation can be improved.
This scheme can be better satisfy the requirement of matching the operation desuperheating, increased flow control valve's regulation performance, promoted the atomization effect that desuperheating water enters into the bearing seal vapour through the nozzle to realize that bearing seal vapour temperature effect reaches the best, overall structure is simple, and the cost is lower, and the suitability is strong, has effectively avoided bearing seal vapour temperature too high and has crossed the potential safety hazard that brings excessively, has ensured the safe and reliable operation of unit.
After the device is used on site, the accurate adjustment of shaft seal steam and desuperheating water can be ensured, the shaft seal steam temperature is reduced to 200 ℃ from the original maximum 300 ℃ after the temperature is reduced, the enthalpy value is reduced by delta h =198KJ/Kg (reduced by 6.4%) under the same steam flow, and the heat output of the shaft seal steam is as follows according to the original design: 10000MJ/h is calculated, the heat output is reduced by 100MJ/h, the heat is saved by calculating the running time of 300 days all the year, Q =300 × 24 × 640MJ =4.608 × 10^6MJ is calculated according to the heat consumption of a unit 7600 kj/(kw.h), the electricity is saved by 4.608 × 10^9/7600=606315kw.h every year, namely the annual cost =606315 × 0.352=21.3 ten thousand.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent application shall be subject to the appended claims.
Claims (9)
1. The device for regulating the steam turbine shaft seal steam desuperheating water comprises a No. 6 low-adding water main pipe (1), a small shaft seal steam supply pipeline (2), a large shaft seal steam supply pipeline (3) and a condensed water pipeline (4), wherein the No. 6 low-adding water main pipe (1) is communicated with a No. 6 low-pressure heater (5), the condensed water pipeline (4) is communicated to the small shaft seal steam supply pipeline (2) and the large shaft seal steam supply pipeline (3) respectively, the device is characterized in that a desuperheating pipeline (6) is arranged between the water outlet end of the condensed water pipeline (4) and the No. 6 low-adding water main pipe (1), the desuperheating pipeline (6) is provided with a first flow regulating valve (7), and the water inlet end of the condensed water pipeline (4) is provided with a second flow regulating valve (14).
2. The apparatus of claim 1 for steam turbine shaft seal steam desuperheating water conditioning, wherein: the water outlet end of the condensed water pipeline (4) is respectively provided with a large machine shaft seal branch pipe (11) and a small machine shaft seal branch pipe (8), the large machine shaft seal branch pipe (11) is communicated to the large machine shaft seal steam supply pipeline (3), and the small machine shaft seal branch pipe (8) is communicated to the small machine shaft seal steam supply pipeline (2).
3. The apparatus of claim 2 for steam turbine shaft seal desuperheating water conditioning, wherein: the large shaft seal branch pipe (11) is provided with a third flow regulating valve (9).
4. The apparatus of claim 3 for steam turbine shaft seal desuperheating water conditioning, wherein: the third flow regulating valve (9) is an electric regulating valve.
5. The apparatus of claim 2 for steam turbine shaft seal desuperheating water conditioning, wherein: the small machine shaft seal branch pipe (8) is provided with a fourth flow regulating valve (10).
6. The apparatus of claim 5 for steam turbine shaft seal desuperheating water conditioning, wherein: the fourth flow regulating valve (10) is an electric regulating valve.
7. The apparatus of claim 1 for steam turbine shaft seal steam desuperheating water conditioning, wherein: the first flow regulating valve (7) and/or the second flow regulating valve (14) are/is a manual regulating valve.
8. The apparatus of claim 1 for steam turbine shaft seal desuperheating water conditioning, wherein: the small shaft seal steam supply pipeline (2) is provided with an atomizing nozzle (12).
9. The apparatus of claim 1 for steam turbine shaft seal steam desuperheating water conditioning, wherein: the large machine shaft seal steam supply pipeline (3) is provided with an atomizing nozzle (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223134720.6U CN218882300U (en) | 2022-11-24 | 2022-11-24 | Device for regulating steam turbine shaft seal steam desuperheating water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223134720.6U CN218882300U (en) | 2022-11-24 | 2022-11-24 | Device for regulating steam turbine shaft seal steam desuperheating water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218882300U true CN218882300U (en) | 2023-04-18 |
Family
ID=85950061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223134720.6U Active CN218882300U (en) | 2022-11-24 | 2022-11-24 | Device for regulating steam turbine shaft seal steam desuperheating water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218882300U (en) |
-
2022
- 2022-11-24 CN CN202223134720.6U patent/CN218882300U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106089338B (en) | A kind of back pressure machine association system and method adjusting heat supply and power generation | |
| CN111852597A (en) | Variable-parameter multi-element cascade thermoelectric decoupling system of thermal power heat supply unit and adjusting method | |
| CN110344899A (en) | The system and method for high pressure industry steam supply ability is mentioned under a kind of power plant underload | |
| CN100558912C (en) | Saturation steam and superheated vapour are mixed for the device that vacuum refining furnace uses | |
| CN204552846U (en) | A kind of back pressure steam turbines utilization system | |
| CN218882300U (en) | Device for regulating steam turbine shaft seal steam desuperheating water | |
| CN103644032A (en) | System for heating natural gas through gradient utilization of water supplied at medium pressure from waste heat boiler of gas turbine power plant | |
| CN108468575A (en) | Extraction and condensing unit based on jet heat pump changes back pressure unit system and its operation method | |
| CN110700909B (en) | Internet surfing electric load adjusting system and adjusting method for heating Ji Re cogeneration unit | |
| CN211174242U (en) | Heating season cogeneration unit on-line electricity load adjusting system | |
| CN208504350U (en) | It is a kind of to improve low when thermal power plant unit peak regulation plus leaving water temperature device | |
| CN107387259B (en) | Heating system, refrigerating system and combined cooling heating and power system | |
| CN112460668B (en) | Undisturbed heat storage system and method for peak valley filling of back pressure type heat supply unit | |
| CN114837757A (en) | Thermal power plant high-pressure feed water bypass frequency modulation system with steam ejector and working method | |
| CN211975072U (en) | Steam working medium excess pressure utilization structure of thermal power factory | |
| CN111780198B (en) | Thermoelectric load wide-range adjusting system for water supply and temperature reduction heat supply | |
| CN107477649A (en) | Turbo-generator Set integrates afterheat utilizing system and method | |
| CN208184799U (en) | Extraction and condensing unit based on jet heat pump changes back pressure unit system | |
| CN206753663U (en) | A kind of hot water converts mechanical dynamic system | |
| CN105698162A (en) | System and method for adjusting air temperature of inlet of coal mill through fed water | |
| CN208252163U (en) | Turbo-generator Set novel energy-conserving system | |
| CN114718676B (en) | Heat storage and release system for fused salt heated by coal-fired unit steam | |
| CN208138009U (en) | A kind of low pressure cylinder cooling system applied to the operation of tri- cylinder three-exhauster turbine low pressure cylinder zero energy of 200MW | |
| CN219976371U (en) | Industrial steam supply temperature regulating system | |
| CN219389683U (en) | Regulation and control device of cogeneration unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |