CN220249970U - Steam supply device and steam turbine backheating steam supply system - Google Patents
Steam supply device and steam turbine backheating steam supply system Download PDFInfo
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- CN220249970U CN220249970U CN202321995672.1U CN202321995672U CN220249970U CN 220249970 U CN220249970 U CN 220249970U CN 202321995672 U CN202321995672 U CN 202321995672U CN 220249970 U CN220249970 U CN 220249970U
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- 238000000605 extraction Methods 0.000 claims description 104
- 238000010438 heat treatment Methods 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 239000002699 waste material Substances 0.000 abstract description 6
- 238000011084 recovery Methods 0.000 description 4
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- 239000000463 material Substances 0.000 description 2
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Abstract
The utility model particularly discloses a steam supply device and a steam turbine regenerative steam supply system. The steam supply device comprises a plurality of branch pipelines, a control valve group and a main pipeline, wherein the plurality of branch pipelines are arranged in parallel and connected with the steam turbine regenerative system, and the plurality of branch pipelines are used for respectively extracting steam at different points on the steam turbine regenerative system so that the grade of the steam extracted from at least one branch pipeline meets the grade requirement of a user; the plurality of control valve groups are arranged on each branch pipe so as to respectively control the on-off of each branch pipe; the main pipeline is connected in series with the air outlet ends of the branch pipelines, and the main pipeline is used for supplying steam extracted by the branch pipelines to users. The steam supply device provided by the embodiment of the utility model can select the steam with different grade heat energy to supply heat during steam supply, so that the waste of energy sources is reduced.
Description
Technical Field
The utility model belongs to the technical field of heat supply of turbines, and particularly relates to a steam supply device and a steam turbine regenerative steam supply system.
Background
When the thermal power generating unit supplies steam in a low-flow industrial mode, heat is supplied by extracting steam from the heat recovery system of the steam turbine, but the extraction pressure of the heat recovery system fluctuates along with load, the heat recovery extraction with the lowest parameter matching is selected for supplying steam when the steam supply system is designed, and when the unit operates in a high-load mode, the industrial steam supply process is often faced with the condition of high-grade heat energy decompression supply, so that huge energy waste is caused.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems in the related art to some extent. Therefore, the embodiment of the utility model provides a steam supply device, which can select steam with corresponding grade heat energy for heating during steam supply, so that the waste of energy sources is reduced.
The embodiment of the utility model also provides a steam turbine regenerative steam supply system.
The steam supply device of the embodiment of the utility model comprises:
the multi-branch pipelines are arranged in parallel, and are connected with the steam turbine regenerative system, and are used for respectively extracting steam at different points on the steam turbine regenerative system so that the grade of the steam extracted from at least one branch pipeline meets the grade requirement of a user;
the plurality of control valve groups are arranged on each branch pipeline, and the control valve groups are arranged on each branch pipeline so as to respectively control the on-off of each branch pipeline;
the main pipeline is connected in series with the air outlet ends of the branch pipelines, and the main pipeline is used for supplying steam extracted by the branch pipelines to users.
According to the steam supply device provided by the embodiment of the utility model, the steam with different grade heat energy can be selected for supplying heat through the multiple branch pipelines, and the steam with corresponding grade heat energy is reasonably selected according to the steam supply requirement, so that the reduced pressure supply of high grade heat energy is reduced, and the waste of energy is reduced.
In some embodiments, the control valve block includes a check valve, a relief valve, and a first valve in series in the branch line.
In some embodiments, at least a portion of the control valve block further comprises a desuperheater in series in the branch line.
In some embodiments, the multi-branch circuit includes at least a first heating circuit, a second heating circuit, and a third heating circuit.
In some embodiments, the steam supply device further comprises a steam supply header connected in series on the main pipe.
In some embodiments, the steam supply device further comprises a second valve, and the second valve is connected in series to the main pipeline to control the on-off of the main pipeline.
The embodiment of the utility model provides a steam turbine regenerative steam supply system, which comprises:
the multi-channel steam extraction pipeline is connected to the steam turbine to extract steam with different grade heat energy respectively;
the steam supply device is the steam supply device according to any one of the above embodiments, and the multiple branch pipelines are respectively connected with the multiple steam extraction pipelines.
In some embodiments, the multi-channel extraction lines include at least a first extraction line, a second extraction line, and a third extraction line, the first extraction line, the second extraction line, and the third extraction line being connected to one of a high pressure cylinder, a medium pressure cylinder, or a low pressure cylinder of the steam turbine.
In some embodiments, the steam turbine regenerative steam supply system further includes a control module, where the control module is configured to detect a steam grade in the multi-channel steam extraction pipeline to control on-off of each branch pipeline.
In some embodiments, the steam turbine regenerative steam supply system further comprises a plurality of heaters, the plurality of heaters are arranged on a water supply pipeline of the boiler, and the plurality of heaters are respectively connected with the plurality of steam extraction pipelines so as to heat water passing through the heaters.
Drawings
Fig. 1 is a schematic structural view of a steam supply device according to an embodiment of the present utility model.
Reference numerals:
a main pipeline 1, a steam supply header 11 and a second valve 12;
branch line 2, check valve 21, pressure reducing valve 22, first valve 23, desuperheater 24, first heating line 251, second heating line 252, third heating line 253;
a steam extraction pipeline 3, a first steam extraction pipeline 31, a second steam extraction pipeline 32 and a third steam extraction pipeline 33;
a high pressure cylinder 41, a medium pressure cylinder 42;
a boiler 5;
a feed pump 6, a water supply line 61, and a heater 62.
Detailed Description
Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.
Referring to fig. 1, a steam supply device according to an embodiment of the present utility model includes a plurality of branch pipes 2, a plurality of control valve groups and a main pipe 1, the plurality of branch pipes 2 are connected in parallel, the plurality of branch pipes 2 are connected with a heat recovery system of a steam turbine, the main pipe 1 is connected in series with a gas outlet end of the plurality of branch pipes 2, the main pipe 1 is used for supplying steam extracted by the branch pipes 2 to a user, the plurality of control valve groups are provided, and each branch pipe 2 is provided with a control valve group to control on/off of each branch pipe 2.
The multi-branch pipelines 2 are used for respectively extracting the steam at different points on the steam turbine regenerative system, so that the grade of the steam extracted from at least one branch pipeline 2 meets the grade requirement of a user, that is, the grade of the steam extracted from the same point also changes under different loads in the operation process of the thermal power assembly. The steam at different point positions in the steam turbine regenerative system is extracted through the plurality of branch pipelines 2, so that the grade of the steam extracted from at least one branch pipeline 2 meets the grade requirement of a user no matter what working condition is, and when the grade of the steam extracted from the plurality of branch pipelines 2 meets the requirement of the user, the steam in the branch pipeline 2 close to the requirement of the user can be selected.
In other words, when the steam in the branch pipes 2 meets the needs of the user during the selection, the steam with the steam grade closer to the needs of the user is selected, so that the waste of energy is reduced, and the high-energy low-use is avoided.
According to the steam supply device provided by the embodiment of the utility model, the steam with different grade heat energy can be selected for supplying heat through the multi-branch pipeline 2, and the steam with corresponding grade heat energy is reasonably selected according to the steam supply requirement, so that the reduced pressure supply of high grade heat energy is reduced, and the waste of energy is reduced.
In some embodiments, the control valve group includes a check valve 21, a pressure reducing valve 22 and a first valve 23 connected in series in the branch pipeline 2, where the check valve 21 can prevent the medium from flowing backwards, the pressure reducing valve 22 can adjust the outlet pressure, so that the outlet pressure is kept relatively stable, and thus the subsequent steam supply is convenient, the first valve 23 is used to control the on-off of the branch pipeline 2, and the first valve 23 may be a gate valve or a stop valve.
In some embodiments, at least part of the control valve group further comprises a desuperheater 24 connected in series in the branch pipelines 2, and on the premise of meeting the steam supply requirement, the steam temperature in the corresponding branch pipelines 2 can be reduced by the desuperheater, so that the safety of equipment is protected, and the requirement of downstream equipment or systems is met.
In some embodiments, the multi-branch circuit 2 includes at least a first heating circuit 251, a second heating circuit 252, and a third heating circuit 253.
It should be noted that, the more branch pipes 2 are arranged in parallel, the more and finer the extracted steam grade sample is, the more steam grade can be selected closer to the requirement of the user, but too many pipes are arranged. The number of branch pipelines 2 is reasonably arranged, so that the practicability is better. The number of branch pipes 2 may be three, four or six.
Optionally, in this embodiment, the first heat supply pipeline 251, the second heat supply pipeline 252 and the third heat supply pipeline 253 are provided, and when the thermal power generating unit is under the same working condition, the steam grade in the first heat supply pipeline 251, the second heat supply pipeline 252 and the third heat supply pipeline 253 is sequentially reduced. Therefore, when the thermal power generating unit operates under low load, the grade of the steam extracted from each heating pipeline is relatively low, and at least the grade of the steam in the first heating pipeline 251 needs to be ensured to meet the requirement of a user; when the thermal power generating unit operates under high load, the grade of the steam extracted from each heat supply pipeline is relatively high, and at this time, the grade of the steam in the first heat supply pipeline 251, the second heat supply pipeline 252 and the third heat supply pipeline 253 all meet the requirements of users, but if the steam in the first heat supply pipeline 251 and the second heat supply pipeline 252 is adopted to supply steam to the users, a certain amount of heat is wasted, so that the energy consumption can be reduced by adopting the steam in the third heat supply pipeline 253.
Under the premise that the steam pressure for users is certain, according to the change of the steam extraction pressure in each stage of steam extraction pipelines in the thermal turbine regenerative system under different working conditions of high load, medium load and low load of the thermal power generating unit, the steam extraction points of branch pipelines 2 are reasonably selected, and the energy consumption can be reduced on the premise that the steam extracted in at least one branch pipeline 2 meets the steam pressure for users.
In some embodiments, the steam supply device further comprises a steam supply header 11, and the steam supply header 11 is connected in series to the main pipeline 1 and is used for collecting, mixing and redistributing steam so as to ensure the grade of steam supply.
In some embodiments, the steam supply device further includes a second valve 12, where the second valve 12 is connected in series to the main pipeline 1 to control the on/off of the main pipeline 1, that is, the second valve 12 is used to control the on/off of the main pipeline 1, and the second valve 12 may be a gate valve or a stop valve.
The steam turbine regenerative steam supply system of the embodiment of the utility model comprises a plurality of steam extraction pipelines 3 and steam supply devices, wherein the plurality of steam extraction pipelines 3 are connected to the steam turbine to respectively extract steam with different grade heat energy, the steam supply devices are the steam supply devices in any embodiment, and the plurality of branch pipelines 2 are respectively connected with the plurality of steam extraction pipelines 3.
In some embodiments, the multi-channel extraction line 3 includes at least a first extraction line 31, a second extraction line 32, and a third extraction line 33, with the first extraction line 31, the second extraction line 32, and the third extraction line 33 being connected to one of a high pressure cylinder 41, a medium pressure cylinder 42, or a low pressure cylinder of the steam turbine.
Specifically, the extraction pressures in the first extraction pipe 31, the second extraction pipe 32 and the third extraction pipe 33 are sequentially reduced, the steam turbine regenerative system is provided with a first section extraction pipe, a second section extraction pipe, a third section extraction pipe and a fourth section extraction pipe … …, taking a steam turbine with seven sections extraction pipes as an example, and the extraction pipes of different sections are respectively connected with different positions of the high pressure cylinder 41, the medium pressure cylinder 42 or the low pressure cylinder. The extraction points of the branch pipes can be selected according to the needs to extract steam with different pressures respectively, and the first steam extraction pipeline 31, the second steam extraction pipeline 32 and the third steam extraction pipeline 33 are any three of a first section steam extraction pipeline, a second section steam extraction pipeline, a third section steam extraction pipeline and a fourth section steam extraction pipeline … … of the steam turbine.
For example, the first heating pipeline 251 in the branch pipeline 2 is connected with a first section of steam extraction pipeline, the second heating pipeline 252 is connected with a second section of steam extraction pipeline, and the third heating pipeline 253 is connected with a third section of steam extraction pipeline so as to respectively obtain steam with different steam extraction pressures at three different points.
Or, the first steam extraction pipeline 31 is a two-section steam extraction pipeline, the second steam extraction pipeline 32 is a four-section steam extraction pipeline, the third steam extraction pipeline 33 is a five-section steam extraction pipeline, the first heat supply pipeline 251 in the branch pipeline 2 is connected with the two-section steam extraction pipeline, the second heat supply pipeline 252 is connected with the four-section steam extraction pipeline, and the third heat supply pipeline 253 is connected with the five-section steam extraction pipeline so as to respectively obtain steam with different steam extraction pressures at three different points.
According to the change of the pressure level of the user steam, the branch pipeline 2 can be utilized to extract steam from the steam extraction pipelines of different sections.
In some embodiments, the steam turbine regenerative steam supply system further includes a control module, where the control module is configured to detect a steam grade in the multiple steam extraction pipelines to control on/off of each branch pipeline 2. That is, the control module is configured to detect the extraction pressures in the first extraction pipe 31, the second extraction pipe 32, and the third extraction pipe 33, and sequentially determine the steam extracted from the branch pipe 2 under the current working condition to supply steam to the user, so as to determine the on-off condition of each branch pipe 2, and further control the on-off of the corresponding branch pipe 2.
For example, when the thermal power generating unit is in high-load operation, the pressures in the first steam extraction pipeline 31 and the second steam extraction pipeline 32 are higher, at this time, if the first steam extraction pipeline 31 and the second steam extraction pipeline 32 are directly used for supplying industrial steam, a certain amount of heat is wasted, at this time, the pressure of the third steam extraction pipeline 33 meets the requirements of steam supply users, and then the pressure reducing valve 22, the desuperheater 24 and the first valve 23 on the third steam extraction pipeline 33 are put into operation, and the first valves 23 on the first steam extraction pipeline 31 and the second steam extraction pipeline 32 are closed.
When the thermal power generating unit is in medium load operation, the steam extraction pressure on the third steam extraction pipeline 33 cannot meet the user requirement, the pressure on the first steam extraction pipeline 31 is higher, at the moment, if the first steam extraction pipeline 31 is directly used for supplying industrial steam, certain heat is wasted, the second steam extraction pipeline 32 is closest to the user requirement, at the moment, the second steam extraction pipeline 32 is selected for supplying steam, and the pressure reducing valve 22 and the first valve 23 on the second steam extraction pipeline 32 are put into operation; the first valve 23 on the first extraction line 31 and the third extraction line 33 is closed.
When the thermal power generating unit is in low-load operation, the pressures of the second steam extraction pipeline 32 and the third steam extraction pipeline 33 cannot meet the user requirements, the first steam extraction pipeline 31 is selected for steam supply, and the pressure reducing valve 22 and the first valve 23 on the first steam extraction pipeline 31 are put into operation; the first valve 23 on the second extraction line 32 and the third extraction line 33 is closed.
In some embodiments, the steam turbine regenerative steam supply system further includes a plurality of heaters 62, wherein the plurality of heaters 62 are disposed on the water supply line 61 of the boiler 5, and the plurality of heaters 62 are respectively connected with the plurality of steam extraction lines to heat the water passing through the heaters 62.
Specifically, the water supply pipe 61 is connected to the water supply pump 6, and the water supply pump 6 supplies water to the boiler 5 through the water supply pipe 61, and a plurality of heaters 62 are disposed on the water supply pipe 61, and the steam supplied through the plurality of steam extraction pipes flows through the heaters 62 and then heats the water flowing through the heaters 62.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While the above embodiments have been shown and described, it should be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the utility model.
Claims (10)
1. A steam supply device, comprising:
the multi-branch pipelines are arranged in parallel, and are connected with the steam turbine regenerative system, and are used for respectively extracting steam at different points on the steam turbine regenerative system so that the grade of the steam extracted from at least one branch pipeline meets the grade requirement of a user;
the plurality of control valve groups are arranged on each branch pipeline, and the control valve groups are arranged on each branch pipeline so as to respectively control the on-off of each branch pipeline;
the main pipeline is connected in series with the air outlet ends of the branch pipelines, and the main pipeline is used for supplying steam extracted by the branch pipelines to users.
2. The steam supply of claim 1, wherein the control valve block includes a check valve, a pressure relief valve, and a first valve in series in the branch line.
3. The steam supply of claim 2, wherein at least a portion of the control valve block further comprises a desuperheater in series with the branch line.
4. The steam supply device of claim 1, wherein the multi-branch line includes at least a first heating line, a second heating line, and a third heating line.
5. The steam supply device of claim 1, further comprising a steam supply header connected in series with the main pipe.
6. The steam supply device according to any one of claims 1 to 5, further comprising a second valve connected in series to the main pipe to control on-off of the main pipe.
7. A steam turbine regenerative steam supply system, comprising:
the multi-channel steam extraction pipeline is connected to the steam turbine to extract steam at different points respectively;
the steam supply device is as claimed in any one of claims 1 to 6, and the multiple branch pipelines are respectively connected with the multiple steam extraction pipelines.
8. The steam turbine regenerative steam supply system of claim 7, wherein the multi-pass steam extraction line comprises at least a first steam extraction line, a second steam extraction line, and a third steam extraction line, the first steam extraction line, the second steam extraction line, and the third steam extraction line being connected to one of a high pressure cylinder, a medium pressure cylinder, or a low pressure cylinder of the steam turbine.
9. The backheating steam supply system of claim 7, further comprising a control module for detecting steam levels in the plurality of steam extraction lines to control on-off of each of the branch lines.
10. The steam turbine regenerative steam supply system of claim 7, further comprising a plurality of heaters, wherein the plurality of heaters are arranged on a water supply pipeline of the boiler, and the plurality of heaters are respectively connected with the plurality of steam extraction pipelines to heat water passing through the heaters.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321995672.1U CN220249970U (en) | 2023-07-27 | 2023-07-27 | Steam supply device and steam turbine backheating steam supply system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321995672.1U CN220249970U (en) | 2023-07-27 | 2023-07-27 | Steam supply device and steam turbine backheating steam supply system |
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| CN220249970U true CN220249970U (en) | 2023-12-26 |
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| CN202321995672.1U Active CN220249970U (en) | 2023-07-27 | 2023-07-27 | Steam supply device and steam turbine backheating steam supply system |
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