CN219061777U - Drainage system of high-low steam turbine unit - Google Patents
Drainage system of high-low steam turbine unit Download PDFInfo
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- CN219061777U CN219061777U CN202223540391.5U CN202223540391U CN219061777U CN 219061777 U CN219061777 U CN 219061777U CN 202223540391 U CN202223540391 U CN 202223540391U CN 219061777 U CN219061777 U CN 219061777U
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Abstract
The utility model discloses a drainage system of a high-low steam turbine unit, which comprises a high-level unit and a low-level unit which are arranged in a high-low structure, wherein the high-level unit and the low-level unit are provided with drainage expansion vessels which are mutually independent; each first hydrophobic pipeline of the high-level unit is connected with a first hydrophobic expansion vessel; and each second hydrophobic pipeline of the low-level unit is connected with a second hydrophobic expansion vessel. The utility model aims at the specificity of the high-low-level turbine unit, and can effectively shorten the flow of the corresponding hydrophobic pipeline, thereby simplifying the arrangement structure of the hydrophobic pipeline and reducing the technical difficulty of the arrangement of the hydrophobic pipeline. Meanwhile, the condensed water in the drainage pipeline can be effectively reduced, the flow resistance of drainage on the drainage pipeline is effectively reduced, the hidden danger of safe operation technology caused by unsmooth drainage of the high-low-level turbine unit is avoided, the reliability is good, and the pertinence is strong.
Description
Technical Field
The utility model relates to a turbine unit, in particular to a drainage system for the turbine unit which is arranged in a high-low structure.
Background
The conventional turbine unit is of a single-shaft configuration structure, namely all cylinders (high-pressure cylinder, medium-pressure cylinder, low-pressure cylinder and the like) of the turbine unit are arranged on the same shaft system. In order to adapt to energy conservation and efficiency improvement, a brand new turbine unit structure, namely a high-position double-shafting configuration structure and a low-position double-shafting configuration structure, is currently available.
Fig. 1 schematically illustrates a typical high-low turbine unit (in the drawing, HP is a high-pressure cylinder, IP1 is a medium-pressure cylinder one, IP2 is a medium-pressure cylinder two, LP1 is a low-pressure cylinder one, LP2 is a low-pressure cylinder two, arrowed lines are steam system flows) having a high-level unit portion (typically a high-pressure cylinder, a medium-pressure cylinder, etc.) and a low-level unit portion (typically a medium-pressure cylinder, a low-pressure cylinder, etc.). The cylinders of the high-order unit are arranged on the same shaft system (namely, the high-order shaft system). The cylinders of the low-order unit are arranged on the same shaft system (namely, the low-order shaft system). The high-level unit and the low-level unit are arranged in floors with different elevations, and the height between the floors is Cheng Yao m or more.
Compared with the conventional turbine unit, the high-low steam turbine unit has the advantages that the cylinders of the high-level shafting are arranged close to the boiler, the distance between the cylinders and the outlet of the boiler is short, that is, the length of a high-temperature high-pressure pipeline of the boiler connected with the cylinders of the high-pressure shafting is short, and the consumption is low. Therefore, the steam parameters and the running efficiency of the whole unit are improved, the manufacturing cost of the whole project can be greatly reduced, the economic benefit for coal-fired power generation is remarkable, and the environmental protection technical requirements of carbon peak and carbon neutralization are met.
The steam turbine unit is driven by steam to do work, so that steam systems such as a steam acting cylinder body and a pipeline for conveying steam and the like inevitably have steam condensation drainage, and the steam systems of the steam turbine unit are required to be provided with smooth and reliable drainage systems so as to avoid drainage entering the cylinder body.
The drain system of the conventional turbine unit mainly comprises a drain expansion vessel connected with a condenser and drain pipelines connected with each drain part on the steam system, wherein the drain pipelines are connected with the drain expansion vessel through on/off control of a drain valve, namely, a cylinder body generating drain and a pipeline generating drain are connected to the drain expansion vessel through corresponding drain pipelines, and finally enter the condenser at the downstream of the low-pressure cylinder.
As for the high-low steam turbine unit, the elevation difference between the high-level unit and the low-level unit is more than about 50m, so that the elevation between the condenser and the high-level unit is even higher, the flow of the hydrophobic pipeline of the hydrophobic system is greatly increased, the technical difficulty of arrangement of the hydrophobic pipeline can be increased, water is extremely easily condensed in the hydrophobic pipeline, the flow resistance of the hydrophobic pipeline along the way is obviously increased, the hydrophobic is unsmooth, the blocking risk of the hydrophobic pipeline is increased, and the technical hidden trouble is brought to the safe operation of the steam turbine unit.
Based on the particularity of the high-low-level turbine unit and the particularity of the drainage system of the existing turbine unit, the existing drainage system cannot be reliably applied to the operation conditions of the high-low-level turbine unit, and the specific design is necessary for the specificity of the high-low-level turbine unit.
Disclosure of Invention
The technical purpose of the utility model is that: aiming at the particularity of the high-low steam turbine set and the technical defects of the existing drainage system, the drainage system which can be reliably applied to the high-low steam turbine set is provided.
The technical aim of the utility model is achieved by the following technical scheme that the drainage system of the high-low steam turbine unit comprises a high-level unit and a low-level unit which are arranged in a high-low structure;
the high-level unit and the low-level unit are provided with mutually independent hydrophobic expansion tanks;
each first hydrophobic pipeline of the high-level unit is connected with a first hydrophobic expansion vessel;
and each second hydrophobic pipeline of the low-level unit is connected with a second hydrophobic expansion vessel.
The technical measures are aimed at the specificity of the high-low turbine unit, and the high-low turbine unit and the low turbine unit are provided with mutually independent water-repellent expanders, namely, the high turbine unit is provided with a set of water-repellent systems which are basically independent of the low turbine unit, and the low turbine unit is provided with a set of water-repellent systems which are basically independent of the high turbine unit. Therefore, the water repellent generated by the high-level unit is discharged through the matched independent water repellent system, and the water repellent generated by the low-level unit is discharged through the matched independent water repellent system, so that the water repellent system between the high-level unit and the low-level unit is not influenced by elevation between the high-level unit and the low-level unit.
Therefore, the technical measures are beneficial to greatly shortening the flow of the drainage pipeline of the high-level unit, thereby simplifying the drainage pipeline arrangement structure of the high-level unit and the low-level unit and reducing the technical difficulty of drainage pipeline arrangement. Meanwhile, the technical measures are beneficial to reducing condensation ponding in the drainage pipeline, effectively reducing the flow resistance of drainage along the drainage pipeline, further being beneficial to reducing the potential safety operation technical hazards of a drainage system to the high-low steam turbine unit, and being good in reliability and strong in pertinence.
As one of preferable schemes, the arrangement position of the first hydrophobic diffusion vessel is close to the high-level unit. The technical measure can directly and greatly shorten the flow of the drainage pipeline of the high-level unit, is beneficial to simplifying the arrangement structure of the drainage pipeline of the high-level unit, and is also beneficial to reliably reducing condensation accumulated water in the drainage pipeline of the high-level unit.
As one of the preferable schemes, the first hydrophobic expansion vessel is an atmospheric hydrophobic expansion structure;
the top of the first drainage expansion vessel is connected with a steam exhaust pipeline which is used for exhausting uncondensed gas in the first drainage expansion vessel to the atmosphere;
the bottom of the first drainage expansion tank is connected with a drainage pipeline, and the drainage pipeline is used for draining the drainage in the first drainage expansion tank.
The technical measures aim at the technical characteristics of relatively less drainage generated by a high-level unit, and the drainage expander is an atmospheric drainage expander, so that the structure is simple and the manufacturing cost is low.
Further, a spraying structure is arranged at the top of the first hydrophobic diffusion vessel;
the spray structure is connected with a first cooling water pipeline, and the first cooling water pipeline is used for conveying cooling water to the spray structure.
The technical measures are to spray and cool the high-temperature hydrophobic water entering the hydrophobic diffusion vessel through cooling water, so that the temperature of the external exhaust gas and the hydrophobic water is reliably reduced, and the heat radiation to the surrounding environment is low.
Further, a liquid level meter is connected to the first hydrophobic diffusion vessel;
the liquid level meter is used for monitoring the drain liquid level in the drain flash tank I and controlling the opening/closing action of a valve on the drain pipeline.
The technical measures can effectively improve the running stability of the hydrophobic diffusion vessel through monitoring the hydrophobic liquid level in the hydrophobic diffusion vessel by the liquid level meter. The monitoring signal of the liquid level meter is fed back to the controller for controlling the valve to act, so that the automatic drainage can be reliably realized, and the operation stability is better.
As one of the preferable schemes, a manual drain valve I and a pneumatic drain valve I which control the on/off action of the drain pipeline I are connected to the drain pipeline I;
and the connection position of the first manual drain valve and the first pneumatic drain valve on the first drain pipeline is close to the high-level unit.
The technical measures are to set the drain valve on the drain pipe close to the high-level turbine unit, so that the length of the drain pipe at the upstream of the drain valve can be effectively reduced, the condensed water accumulated at the upstream of the drain valve can be reliably reduced during operation, the condensed water is prevented from entering the cylinder, and the technical hidden danger of the drain system on the safe operation of the high-level turbine unit and the low-level turbine unit is further reduced.
As one of the preferable schemes, the second drainage expander is connected to the side surface of the condenser;
the arrangement position of the condenser is close to the low-level unit.
Furthermore, the two hydrophobic expansion vessels are connected to two sides of the condenser and are arranged in a knapsack mode.
The technical measures do not need to consider the drainage system of the high-order unit, can effectively shorten the drainage pipeline flow of the low-order unit, are also beneficial to simplifying the drainage pipeline arrangement structure of the low-order unit, and are beneficial to reliably reducing condensation ponding in the drainage pipeline of the low-order unit. Meanwhile, the two drain expanders are respectively arranged on two sides of the condenser, so that the condenser is favorable for being uniformly stressed, and the condenser connected with the drain expanders is ensured to stably operate.
Further, a steam exhaust channel is arranged between the top of the second drainage expansion vessel and the condenser, and the steam exhaust channel is used for discharging uncondensed gas in the second drainage expansion vessel to the condenser;
a drainage channel is arranged between the bottom of the second drainage expansion tank and the condenser, and the drainage channel is used for draining the drainage in the second drainage expansion tank to the condenser.
Further, a spraying structure is arranged at the top of the second hydrophobic diffusion vessel;
the spray structure is connected with a second cooling water pipeline which is used for conveying cooling water to the spray structure.
According to the technical measure, the cooling water sprays and cools the high-temperature drain water entering the drain flash tank, so that the temperature of steam and drain water is reliably reduced, and the influence on the condenser is reduced. Meanwhile, the steam and the water in the water-repellent expansion vessel are discharged to the condenser, so that further treatment is facilitated, and working media are recovered.
As one of the preferable schemes, the second drain pipeline is connected with a second manual drain valve and a second pneumatic drain valve which control the on/off action of the drain pipeline;
and the connection position of the manual drain valve II and the pneumatic drain valve II on the drain pipeline II is close to the low-level unit.
The technical measures are to set the drain valve on the drain pipe close to the low-level unit, so that the length of the drain pipe at the upstream of the drain valve can be effectively reduced, the condensed water accumulated at the upstream of the drain valve can be reliably reduced during operation, the condensed water is prevented from entering the cylinder, and the technical hidden trouble of the drain system on the safe operation of the high-level and low-level steam turbine unit is further reduced.
The beneficial technical effects of the utility model are as follows: the technical measures are aimed at the specificity of the high-low-level turbine unit, and the flow of the corresponding drainage pipeline can be effectively shortened, so that the arrangement structure of the drainage pipeline is simplified, and the technical difficulty of arrangement of the drainage pipeline is reduced. Meanwhile, the condensed water in the drainage pipeline can be effectively reduced, the flow resistance of drainage on the drainage pipeline along the drainage pipeline is effectively reduced, the potential safety hazard of the drainage system to the safe operation technology of the high-low steam turbine unit is reduced, the reliability is good, and the pertinence is strong.
Drawings
FIG. 1 is a schematic diagram of a steam working flow of a steam turbine unit arranged in a high and low configuration.
Fig. 2 is a schematic structural view of the present utility model.
The meaning of the symbols in the figures: 1-a high-level unit; 11-a hydrophobic diffusion vessel I; 12-a first drainage pipeline; 13-manual drain valve one; 14-a pneumatic drain valve I; 15-a steam exhaust pipeline; 16-a drainage pipeline; 17-a first cooling pipeline; 18-a level gauge;
2-low-level units; 21-a second hydrophobic diffusion vessel; 22-a second drainage pipeline; 23-a manual drain valve II; 24-a pneumatic drain valve II; 25-a condenser; 26-cooling pipeline two.
Detailed Description
The utility model relates to a turbine unit, in particular to a drainage system for the turbine unit which is arranged in a high-level and low-level structure, and the technical scheme of the main body of the utility model is specifically described below by combining a plurality of embodiments. Wherein, the embodiment 1 is combined with the attached drawing in the specification, namely, fig. 2, to clearly and specifically explain the technical scheme of the utility model; other embodiments, although not drawn separately, may still refer to the drawings of embodiment 1 for its main structure.
It is to be noted here in particular that the figures of the utility model are schematic, which for the sake of clarity have simplified unnecessary details in order to avoid obscuring the technical solutions of the utility model which contribute to the state of the art.
Example 1
Referring to fig. 2, the present utility model includes a high-order unit 1 and a low-order unit 2 arranged in a high-order and low-order configuration.
The cylinder type and arrangement structure of the high-level turbine unit 1 can be a combination of an ultrahigh pressure cylinder, a high pressure cylinder and a medium pressure cylinder, a combination of the high pressure cylinder and the medium pressure cylinder, a combination of the ultrahigh pressure cylinder and the high pressure cylinder and the like according to the design requirements of the high-level turbine unit.
The cylinder type and arrangement structure of the low-level unit 2 can be a combination of a medium-pressure cylinder and a low-pressure cylinder or a combination of simple low-pressure cylinders according to the design requirements of the high-level turbine unit.
In the present embodiment, the high-order bank 1 is a combination of a high-pressure cylinder HP and a medium-pressure cylinder IP1, and the low-order bank 2 is a combination of a medium-pressure cylinder IP2, a low-pressure cylinder LP1, and a low-pressure cylinder LP 2.
The hydrophobic diffusion vessel 11 which is as close to the high-level unit 1 as possible is arranged near the operation platform of the high-level unit 1 at a position which does not affect the safe operation of the high-level unit 1.
The first hydrophobic expansion vessel 11 adopts an atmospheric hydrophobic expansion structure. A steam exhaust pipe 15 is connected to the top of the first hydrophobic diffusion vessel 11, and the steam exhaust pipe 15 is used for directly exhausting the uncondensed gas in the first hydrophobic diffusion vessel 11 to the atmosphere. A drain pipeline 16 is connected to the bottom of the first drainage expansion tank 11, and the drain pipeline 16 is used for draining the drainage in the first drainage expansion tank 11, wherein the drainage can be directly drained or recycled; the drain line 16 is provided with a valve for controlling the on/off state thereof. The top of the first drainage expansion tank 11 is provided with a spraying structure, the spraying structure is connected with a first cooling water pipeline 17, the first cooling water pipeline 17 is used for conveying cooling water (usually condensation water from a condensation pump) to the spraying structure, and the spraying structure is used for spraying, cooling and energy dissipation of the drainage entering the first drainage expansion tank 11.
In order to ensure stable operation of the first hydrophobic diffusion vessel 11, the hydrophobic liquid level entering the first hydrophobic diffusion vessel 11 is always in a controllable range, and a liquid level meter 18 is connected to the first hydrophobic diffusion vessel 11, and the liquid level meter 18 is used for monitoring the hydrophobic liquid level in the first hydrophobic diffusion vessel 11. To achieve automatic control, the level gauge 18 sends a drain level monitoring signal to the controller in the drain flash tank 11, and the controller controls the opening/closing action of the valve on the drain pipeline 16 according to the level setting height, thereby controlling the on/off state of the drain pipeline 16.
The steam system composed of the cylinders and the steam pipes of the high-level unit 1 is respectively connected with a first drainage pipeline 12 at each drainage part of the steam system. The downstream ends of the first drain pipes 12 are connected to the first drain header 11 independently or collectively, and serve to supply the drain generated at each drain portion of the steam system of the high-level unit 1 to the first drain header 11.
Each drain pipe I12 is connected with a manual drain valve I13 and a pneumatic drain valve I14 which control the on/off action of the drain pipe I12. The first manual drain valve 13 is positioned upstream of the first pneumatic drain valve 14, the first manual drain valve 13 is in a normally open state, and the first manual drain valve 13 is used for manually controlling the on/off state of the first drain pipeline 12. The first pneumatic drain valve 14 is an automatic valve and operates according to a control signal of a controller. The connection position of the first manual drain valve 13 and the first pneumatic drain valve 14 on the first drain pipeline 12 is as close to the high-level unit 1 as possible on the premise of not influencing the operation of the steam system.
The low-level unit 2 is provided with a condenser 25 at the downstream, which is near the operation platform of the low-level unit 2, and the condenser 25 is as close to the low-level unit 2 as possible at a position which does not affect the safe operation of the low-level unit 1 and the condenser 25.
Two sides of the condenser 25 are in a knapsack type externally hung structure, and are connected with two second hydrophobic expansion vessels 21, and the two second hydrophobic expansion vessels 21 are oppositely arranged at two sides of the condenser 25.
A steam exhaust channel is arranged between the top of each second hydrophobic diffusion container 21 and the condenser 25, and the steam exhaust channel is used for discharging uncondensed gas in the second hydrophobic diffusion container 21 to the condenser 25. A drain channel is arranged between the bottom of each second drain diffusion container 21 and the condenser 25, and is used for draining the drain water in the second drain diffusion container 21 to the condenser 25. The top of each second hydrophobic diffusion container 21 is provided with a spraying structure, the spraying structure is connected with a second cooling water pipeline 26, the second cooling water pipeline 26 is used for conveying cooling water (usually condensation water from a condensation pump) to the spraying structure, and the spraying structure sprays, cools and dissipates energy of the hydrophobic water entering the corresponding second hydrophobic diffusion container 21.
The steam system composed of the cylinders and the steam pipes of the low-level unit 2 is respectively connected with a second drainage pipeline 22 at each drainage part of the steam system. The second hydrophobic pipelines 22 are divided into two groups, and each group of the second hydrophobic pipelines 22 corresponds to one second hydrophobic diffusion vessel 21; the downstream ends of the second hydrophobic pipelines 22 of the same group are independently or collectively connected to the second hydrophobic expansion tank 21 corresponding thereto, and serve to convey the hydrophobic water generated at the hydrophobic portions of the steam system of the low-level unit 2 to the second hydrophobic expansion tank 21.
Each second drain pipe 22 is connected with a second manual drain valve 23 and a second pneumatic drain valve 24 for controlling the on/off action of the second drain pipe 22. The manual drain valve II 23 is positioned upstream of the pneumatic drain valve II 24, the manual drain valve II 23 is in a normally open state, and the manual drain valve II 23 is used for manually controlling the on/off state of the drain pipeline II 22. The pneumatic drain valve II 24 is an automatic valve and acts according to a control signal of the controller. The connection position of the manual drain valve II 23 and the pneumatic drain valve II 24 on the drain pipeline II 22 is as close to the low-level unit 2 as possible on the premise of not influencing the operation of the steam system.
During operation, the condenser 25 downstream of the low-level unit 2 is in a high vacuum state. The drain water generated by each drain position of the steam system of the low-level unit 2 enters a corresponding drain expansion tank II 21 through a corresponding drain pipeline II 22 under the drive of pressure difference and height difference, is subjected to flash evaporation, expansion and depressurization, and is cooled through cooling water. The uncondensed gas in the second drainage expansion vessel 21 enters the condenser 25 through the steam discharge channel for further condensation, and the drainage automatically flows into the condenser 25 through the drainage channel.
Therefore, the high-level unit 1 and the low-level unit 2 correspond to two sets of basically mutually independent drainage systems, and the pipeline flow of the drainage system of the whole unit is not influenced by elevation between the high-level unit 1 and the low-level unit 2.
Example 2
The utility model comprises a high-level unit and a low-level unit which are arranged in a high-level structure and a low-level structure.
The cylinder type and arrangement structure of the high-level turbine unit can be a combination of an ultrahigh pressure cylinder, a high pressure cylinder and a medium pressure cylinder, a combination of the high pressure cylinder and the medium pressure cylinder, a combination of the ultrahigh pressure cylinder and the high pressure cylinder and the like according to the design requirements of the high-level turbine unit. The cylinder type and arrangement structure of the low-level unit can be a combination of a medium-pressure cylinder and a low-pressure cylinder or a combination of simple low-pressure cylinders according to the design requirements of the high-level turbine unit.
In this embodiment, the high-order unit is a combination of the high-pressure cylinder HP and the middle-pressure cylinder IP1, and the low-order unit is a combination of the middle-pressure cylinder IP2, the low-pressure cylinder LP1, and the low-pressure cylinder LP 2.
And a first drainage expander which is as close to the high-level unit as possible is arranged near the operation platform of the high-level unit at a position which does not influence the safe operation of the high-level unit.
The first hydrophobic expansion vessel adopts an atmospheric hydrophobic expansion structure. The top of the first drainage expansion vessel is connected with a steam exhaust pipeline which is used for directly exhausting the uncondensed gas in the first drainage expansion vessel to the atmosphere. The bottom of the first drainage expansion tank is connected with a drainage pipeline, and the drainage pipeline is used for draining the drainage in the first drainage expansion tank, and the drainage pipeline can be directly drained or drained and recycled; the water outlet pipe is provided with a valve for controlling the on/off state of the water outlet pipe. The top of the first drainage expansion vessel is provided with a spraying structure, the spraying structure is connected with a first cooling water pipeline, the first cooling water pipeline is used for conveying cooling water (usually condensation water from a condensation pump) to the spraying structure, and the spraying structure is used for spraying, cooling and energy dissipation of drainage entering the first drainage expansion vessel.
In order to ensure the stable operation of the first hydrophobic diffusion container, the liquid level of the hydrophobic liquid entering the first hydrophobic diffusion container is always in a controllable range, and a liquid level meter is connected to the first hydrophobic diffusion container and used for monitoring the liquid level of the hydrophobic liquid in the first hydrophobic diffusion container. In order to realize automatic control, the liquid level meter transmits a drainage liquid level monitoring signal in the drainage expansion tank I to the controller, and the controller controls the opening/closing action of a valve on the drainage pipeline according to the liquid level setting height so as to control the on/off state of the drainage pipeline.
The steam system composed of each cylinder body and each steam pipeline of the high-level unit is respectively connected with a first drainage pipeline at each drainage part of the steam system. The downstream ends of the first drainage pipelines are independently or collectively connected to the first drainage expander and are used for conveying drainage generated by each drainage part of the steam system of the high-level unit to the first drainage expander.
Each drain pipeline I is connected with a manual drain valve I and a pneumatic drain valve I which control the on/off action of the drain pipeline I. The first manual drain valve is arranged at the upstream of the first pneumatic drain valve, the first manual drain valve is in a normally open state, and the first manual drain valve is used for manually controlling the on/off state of the first drain pipeline. The first pneumatic drain valve is an automatic valve and acts according to a control signal of the controller. The connection position of the manual drain valve I and the pneumatic drain valve I on the drain pipeline I is as close to the high-level unit as possible on the premise of not influencing the operation of the steam system.
The low-level unit is provided with a condenser at the downstream, which is near the operation platform of the low-level unit, and is as close to the low-level unit as possible at a position which does not affect the safe operation of the low-level unit and the condenser.
A second drainage expansion vessel is arranged beside the condenser. And a steam exhaust pipeline is connected between the top of the second drainage expansion vessel and the condenser and is used for discharging uncondensed gas in the second drainage expansion vessel to the condenser. A drainage pipeline is connected between the bottom of the second drainage expansion tank and the condenser, and the drainage pipeline is used for draining the drainage in the second drainage expansion tank to the condenser. The top of the second hydrophobic expansion vessel is provided with a spraying structure, the spraying structure is connected with a second cooling water pipeline, the second cooling water pipeline is used for conveying cooling water (usually condensation water from a condensation pump) to the spraying structure, and the spraying structure is used for spraying, cooling and energy dissipation of the hydrophobic water entering the second hydrophobic expansion vessel.
And a steam system formed by each cylinder body and each steam pipeline of the low-level unit is respectively connected with a second drainage pipeline at each drainage part of the steam system. The downstream ends of the second hydrophobic pipelines are independently or collectively connected to the second hydrophobic diffusion vessel and are used for conveying the hydrophobic generated by each hydrophobic part of the steam system of the low-level unit to the second hydrophobic diffusion vessel.
Each second drain pipeline is connected with a second manual drain valve and a second pneumatic drain valve which control the on/off action of the second drain pipeline. The manual drain valve II is positioned at the upstream of the pneumatic drain valve II and is in a normally open state, and the manual drain valve II is used for manually controlling the on/off state of the drain pipeline II. The pneumatic drain valve II is an automatic valve and acts according to a control signal of the controller. The connection position of the manual drain valve II and the pneumatic drain valve II on the drain pipeline II is as close to the low-level unit as possible on the premise of not influencing the operation of the steam system.
In the operation process, the condenser at the downstream of the low-level unit is in a high vacuum state. The drainage generated at each drainage part of the steam system of the low-level unit enters a drainage expansion tank II through a corresponding drainage pipeline II under the drive of pressure difference and height difference, is subjected to flash evaporation, expansion and depressurization, and is cooled through cooling water. Non-condensed gas in the second drainage expansion vessel enters the condenser through the steam exhaust pipeline to be further condensed, and drainage automatically flows into the condenser through the drainage pipeline.
Therefore, the high-level unit and the low-level unit correspond to two sets of basically mutually independent drainage systems, and the pipeline flow of the drainage system of the whole unit is not influenced by elevation between the high-level unit and the low-level unit.
The above examples are only intended to illustrate the present utility model, not to limit it.
Although the utility model has been described in detail with reference to the above embodiments, it will be understood by those of ordinary skill in the art that: the above embodiments can be modified or some technical features thereof can be replaced by others; such modifications and substitutions do not depart from the spirit and scope of the utility model.
Claims (10)
1. A drainage system of a high-low steam turbine unit comprises a high-level unit (1) and a low-level unit (2) which are arranged in a high-level structure and a low-level structure;
the method is characterized in that:
the high-level unit (1) and the low-level unit (2) are provided with mutually independent hydrophobic expansion tanks;
each first hydrophobic pipeline (12) of the high-level unit (1) is connected with a first hydrophobic expansion tank (11);
and each second hydrophobic pipeline (22) of the low-level unit (2) is connected with a second hydrophobic expansion tank (21).
2. The steam trap system of a high and low steam turbine set of claim 1, wherein:
the arrangement position of the first hydrophobic diffusion vessel (11) is close to the high-level unit (1).
3. The steam trap system of a high-low steam turbine set according to claim 1 or 2, wherein:
the first hydrophobic expansion vessel (11) is of an atmospheric hydrophobic expansion structure;
the top of the first hydrophobic diffusion vessel (11) is connected with a steam exhaust pipeline (15), and the steam exhaust pipeline (15) is used for exhausting uncondensed gas in the first hydrophobic diffusion vessel (11) to the atmosphere;
the bottom of the first drainage expansion tank (11) is connected with a drainage pipeline (16), and the drainage pipeline (16) is used for draining water in the first drainage expansion tank (11) out.
4. A steam trap system for a high and low steam turbine set according to claim 3, wherein:
a spraying structure is arranged at the top of the first hydrophobic diffusion vessel (11);
the spray structure is connected with a first cooling water pipeline (17), and the first cooling water pipeline (17) is used for conveying cooling water to the spray structure.
5. A steam trap system for a high and low steam turbine set according to claim 3, wherein:
the first hydrophobic diffusion vessel (11) is connected with a liquid level meter (18);
the liquid level meter (18) is used for monitoring the drain liquid level in the drain flash tank I (11) and controlling the opening/closing action of a valve on the drain pipeline (16).
6. The steam trap system of a high and low steam turbine set of claim 1, wherein:
a manual drain valve I (13) and a pneumatic drain valve I (14) which control the on/off action of the drain pipeline I (12) are connected to the drain pipeline I (12);
the connection position of the first manual drain valve (13) and the first pneumatic drain valve (14) on the first drain pipeline (12) is close to the high-level unit (1).
7. The steam trap system of a high and low steam turbine set of claim 1, wherein:
the second drainage expander (21) is connected to the side surface of the condenser (25);
the condenser (25) is arranged close to the low-level unit (2).
8. The steam trap system of a high and low steam turbine set of claim 7, wherein:
a steam exhaust channel is arranged between the top of the second hydrophobic diffusion vessel (21) and the condenser (25), and is used for discharging uncondensed gas in the second hydrophobic diffusion vessel (21) to the condenser (25);
a drainage channel is arranged between the bottom of the second drainage expansion tank (21) and the condenser (25), and the drainage channel is used for draining the drainage in the second drainage expansion tank (21) to the condenser (25).
9. The steam trap system of a high-low steam turbine set according to claim 7 or 8, wherein:
a spraying structure is arranged at the top of the second hydrophobic diffusion vessel (21);
and the spray structure is connected with a second cooling water pipeline (26), and the second cooling water pipeline (26) is used for conveying cooling water to the spray structure.
10. The steam trap system of a high and low steam turbine set of claim 1, wherein:
a manual drain valve II (23) and a pneumatic drain valve II (24) for controlling the on/off action of the drain pipeline II (22) are connected to the drain pipeline II (22);
the connection position of the manual drain valve II (23) and the pneumatic drain valve II (24) on the drain pipeline II (22) is close to the low-level unit (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223540391.5U CN219061777U (en) | 2022-12-29 | 2022-12-29 | Drainage system of high-low steam turbine unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223540391.5U CN219061777U (en) | 2022-12-29 | 2022-12-29 | Drainage system of high-low steam turbine unit |
Publications (1)
| Publication Number | Publication Date |
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| CN219061777U true CN219061777U (en) | 2023-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223540391.5U Active CN219061777U (en) | 2022-12-29 | 2022-12-29 | Drainage system of high-low steam turbine unit |
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| Country | Link |
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| CN (1) | CN219061777U (en) |
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2022
- 2022-12-29 CN CN202223540391.5U patent/CN219061777U/en active Active
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