CN214119696U - Mutually-communicated auxiliary steam system - Google Patents
Mutually-communicated auxiliary steam system Download PDFInfo
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- CN214119696U CN214119696U CN202023025287.3U CN202023025287U CN214119696U CN 214119696 U CN214119696 U CN 214119696U CN 202023025287 U CN202023025287 U CN 202023025287U CN 214119696 U CN214119696 U CN 214119696U
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Abstract
The embodiment of the utility model provides an auxiliary steam system which is communicated with each other, wherein each auxiliary steam header is respectively connected with an auxiliary steam self-supply pipeline and a communication pipeline; the plurality of communicating pipelines are converged and then are connected to one end of the starting steam source pipeline; the communication pipeline is provided with a first manual valve; the other end of the starting steam source pipeline is communicated with the starting furnace and used for conveying starting steam generated by the starting furnace; the control valve set is arranged on the starting steam source pipeline and used for controlling the circulation of starting steam in the starting steam source pipeline. The utility model discloses the unit by supplementary steam system normal operating stops or supplies the unusual unit of vapour to supply supplementary steam for the unit group entirely, and vapour source quality has the controllability, and stability is high, and system structure is simple, arranges in the factory, and the pipeline is shorter, and hydrophobic point is less, and steam transport cost is low, and system installation cost is low, need not to purchase vapour outward, need not to start the stove, and cost is cheap relatively, has improved the security and the stability of the interior supplementary steam system of factory.
Description
Technical Field
The utility model relates to an auxiliary steam system technical field particularly, relates to an auxiliary steam system of mutual intercommunication.
Background
In addition to the main steam-water cycle, the combined gas-steam cycle unit also requires a steam supply system for heating and backup steam, i.e., an auxiliary steam system, which is related to the start-up, shutdown and normal operation of the boiler, the steam turbine and auxiliary equipment thereof. The auxiliary steam system is used as a public steam system of the unit and the whole plant and provides auxiliary steam for related auxiliary equipment and systems so as to meet the requirements of various operation conditions such as unit starting, normal operation, load reduction, load shedding, shutdown and the like.
Currently, auxiliary steam in a gas-steam combined cycle unit generally adopts an external auxiliary steam source, such as: the steam supply system comprises an external steam supply system, a starting furnace steam supply system and the like, wherein in the prior art, each set of two-in-one combined cycle unit auxiliary steam systems in a plant are mutually independent, when one set of two-in-one combined cycle unit stops completely, an external auxiliary steam source is required to be used for starting the combined cycle unit, steam is mainly provided for a low-pressure steam pocket and a deaerator of a waste heat boiler when a combustion engine is started, the use cost is high, the economy is not high, the pipeline arrangement of the steam systems is long, and the safety is poor.
SUMMERY OF THE UTILITY MODEL
The present specification provides an intercommunicating auxiliary steam system to overcome at least one technical problem in the prior art.
According to an embodiment of the present description, there is provided an intercommunicating auxiliary steam system, including: the system comprises a plurality of auxiliary steam headers, a plurality of auxiliary steam self-supply pipelines, a starting steam source pipeline, a control valve group, a plurality of communication pipelines and a plurality of first manual valves; wherein:
each auxiliary steam header is respectively connected with one auxiliary steam self-supply pipeline and one communication pipeline; the plurality of communicating pipelines are converged and then are connected to one end of the starting steam source pipeline; the first manual valve is arranged on the communication pipeline; the other end of the starting steam source pipeline is communicated with a starting furnace and used for conveying starting steam generated by the starting furnace; the control valve group is arranged on the starting steam source pipeline and used for controlling the circulation of starting steam in the starting steam source pipeline.
Optionally, the control valve set comprises a second manual valve, an electric valve and a check valve.
Optionally, the auxiliary steam is communicated with an exhaust port of the high-pressure cylinder of the steam turbine from a supply pipeline.
Optionally, the auxiliary steam system further comprises a third manual valve, which is disposed on the auxiliary steam self-supply pipeline and controls the circulation of steam in the auxiliary steam self-supply pipeline.
Further optionally, the first manual valve, the second manual valve and the third manual valve are all manual stop valves.
The beneficial effects of the embodiment of the specification are as follows:
the auxiliary steam systems of the two-to-one combined cycle units are connected in a hooked mode to form an interconnected auxiliary steam system, when one two-to-one combined cycle unit group stops completely, the other two-to-one combined cycle unit group supplies auxiliary steam to the other two-to-one combined cycle unit group, meanwhile when the auxiliary steam systems of the one two-to-one combined cycle unit group supply steam abnormally, the other two-to-one combined cycle unit group can also supply auxiliary steam to the other two-to-one combined cycle unit group in time, and normal operation of the combined cycle unit is guaranteed. The unit of by supplementary steam system normal operating stops for the unit group completely or supplies the unusual unit of vapour to supply supplementary steam, the vapour source quality has the controllability, and stability is high, system architecture is simple, and the in-plant arrangement, the pipeline is shorter, and it is less to drain, and steam transport cost is low, and system installation cost is low, need not to purchase vapour outward, need not to start the stove, and the cost is cheap relatively, and the system is simple nimble, can deal with different situations, and the suitability is strong, has improved the security and the stability of supplementary steam system in the factory.
The innovation points of the embodiment of the specification comprise:
1. in this embodiment, the auxiliary steam systems of the two-to-one combined cycle units are hooked to form an interconnected auxiliary steam system, and when one two-to-one combined cycle unit group is completely stopped, the other set supplies auxiliary steam to the one two-to-one combined cycle unit group, and meanwhile, when the auxiliary steam systems of the one two-to-one combined cycle unit group supply steam abnormally, the other set can also supply auxiliary steam to the one two-to-one combined cycle unit group in time, so that normal operation of the combined cycle unit is ensured, and the steam system is one of innovation points of the embodiments of the description.
2. In this embodiment, the unit in which the auxiliary steam system normally operates supplies auxiliary steam to the unit in which the unit group completely stops or the steam supply is abnormal, and the steam source quality has controllability and high stability, which is one of the innovative points in the embodiments of the present specification.
3. In the embodiment, the system has a simple structure, is arranged in a plant, has short pipelines, fewer drainage points, low steam conveying cost and low system installation cost, and is one of the innovation points of the embodiment of the specification.
4. In the embodiment, external steam purchase is not needed, starting of the furnace is not needed when one set of two-in-one set of the two-in-one set of the two-in the two sets of the.
5. In the embodiment, the system is simple and flexible, has strong applicability to different conditions, improves the safety and stability of the auxiliary steam system in the plant, and is one of the innovation points of the embodiment of the specification.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of an interconnected auxiliary steam system provided in an embodiment of the present disclosure;
in the figure, 1 is an auxiliary steam header, 2 is an auxiliary steam self-supply pipe, 3 is a startup steam source pipe, 4 is a communication pipe, 5 is a first manual valve, 6 is a second manual valve, 7 is an electric valve, 8 is a check valve, and 9 is a third manual valve.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only some embodiments of the present disclosure, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.
It should be noted that the terms "including" and "having" and any variations thereof in the embodiments of the present specification and the drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
The embodiment of the specification discloses an auxiliary steam system communicated with each other. The following are detailed below.
The utility model provides an auxiliary steam system of intercommunication each other includes: a plurality of auxiliary steam headers 1, a plurality of auxiliary steam self-supply pipelines 2, a starting steam source pipeline 3, a control valve group, a plurality of communication pipelines 4 and a plurality of first manual valves 5; wherein, each auxiliary steam header 1 is respectively connected with one auxiliary steam self-supply pipeline 2 and one communication pipeline 4; a plurality of the communication pipelines 4 are converged and then are commonly connected to one end of the starting steam source pipeline 3; the first manual valve 5 is arranged on the communication pipeline 4; the other end of the starting steam source pipeline 3 is communicated with a starting furnace and used for conveying starting steam generated by the starting furnace; the control valve group is arranged on the starting steam source pipeline 3 and controls the circulation of starting steam in the starting steam source pipeline 3.
Hooking a plurality of sets of auxiliary steam systems of the two-in-one combined cycle unit to form an interconnected auxiliary steam system, wherein each set of the two-in-one combined cycle unit supplies auxiliary steam in the normal operation process, when one set of two-in-one combined cycle set completely stops or steam supply is abnormal, the other set of two-in-one combined cycle set supplies auxiliary steam for the combined cycle set, so that the intercommunication of the auxiliary steam between the units in the plant is realized, the auxiliary steam of the unit normally running in the plant is adopted to replace an external auxiliary steam source, the steam source has stable and controllable quality and high stability, this supplementary steam system only needs to collude the supplementary steam system that links of dragging a combined cycle unit with each set of two in the factory, and the pipeline is shorter, and hydrophobic point is less, and steam transport cost is low, has improved the holistic security of supplementary steam system, and need not to purchase vapour outward, need not to start-up the stove, cost is cheap relatively.
Specifically, the auxiliary steam header 1 of each two-in-one combined cycle unit realizes the self-supply and conveying of steam in the unit through the auxiliary steam self-supply pipeline 2 and is communicated with the starting furnace through the communication pipeline 4 and the starting steam source pipeline 3, so that the unit obtains a starting steam source from the starting furnace when being started initially, and the communication pipelines 4 in each two-in-one combined cycle unit are communicated with each other, so that an interconnected auxiliary steam system is formed between each two-in-one combined cycle unit, and the mutual supply of auxiliary steam among each unit can be realized. The control valve set is used for controlling and starting the steam circulation in the steam source pipeline 3, the first manual valves 5 are used for controlling the steam circulation in the corresponding communication pipelines 4, and therefore the control valve set and the first manual valves 5 are used for controlling the steam source of the auxiliary steam header 1.
Furthermore, the control valve group comprises a second manual valve 6, an electric valve 7 and a check valve 8, auxiliary steam is supplied to the auxiliary steam header 1 through the second manual valve 6 and the electric valve 7, the check valve 8 is arranged and used for preventing steam return when the auxiliary steam header 1 is supplied with steam by the commissioning starting furnace, the double-valve control is realized, and meanwhile, a device for preventing steam return is arranged, so that the control is more reliable, and the safety of the system is improved.
In order to realize the self-supply of the auxiliary steam of the combined cycle unit, the auxiliary steam self-supply pipeline 2 is communicated with an exhaust port of a high-pressure cylinder of a steam turbine, the exhaust steam of the high-pressure cylinder of the steam turbine is used for supplying the auxiliary steam after being regulated in pressure and temperature, and is led to the auxiliary steam header 1 through the auxiliary steam self-supply pipeline 2, so that the self-supply of the shaft seal system of the unit is realized, an external auxiliary steam source is not needed, the problems of long pipeline arrangement and poor safety of the steam system when the external auxiliary steam source is adopted are solved, and the steam conveying cost is low and the manufacturing cost is low. Preferably, the auxiliary steam system further comprises a third manual valve 9, wherein the third manual valve 9 is disposed on the auxiliary steam self-supply pipeline 2, and controls the steam circulation in the auxiliary steam self-supply pipeline 2, so that the steam source switching of the auxiliary steam header 1 at different periods is realized by using a control valve set, the first manual valve 5 and the third manual valve 9.
In a specific embodiment, the first manual valve 5, the second manual valve 6 and the third manual valve 9 are all manual cut-off valves, the auxiliary steam flow in the communication pipeline 4 is connected or blocked through the first manual valve 5, the steam flow in the starting steam source pipeline 3 is connected or blocked through the second manual valve 6, and the auxiliary steam flow in the self-supply pipeline 2 is connected or blocked through the third manual valve 9.
The following description will be given in detail by taking two sets of two-by-one combined cycle units as an example, as shown in fig. 1, the auxiliary steam headers 1 in the two sets of two-by-one combined cycle units are respectively connected with an auxiliary steam self-supply pipeline 2 and a communication pipeline 4, the auxiliary steam self-supply pipeline 2 realizes the self-supply steam delivery, a third manual valve 9 is installed on the auxiliary steam self-supply pipeline 2, a first manual valve 5 is installed on the communication pipeline 4, the other ends of the two communication pipelines 4 are mutually communicated and are jointly connected with a starting steam source pipeline 3, the starting steam source pipeline 3 is communicated with a starting furnace to realize the delivery of a starting steam source, and a control valve set is installed on the starting steam source pipeline 3.
When two sets of two-driving-one combined cycle units are initially started, a control valve set and two first manual valves 5 are opened, the starting sources of the auxiliary steam headers 1 of the two sets come from a starting furnace, when the auxiliary steam headers 1 of the two sets of units normally run, the first manual valves 5 are closed, the third manual valves 9 on the auxiliary steam self-supply pipelines 2 of the two sets of units are opened, and the two sets of units respectively supply auxiliary steam sources to the auxiliary steam headers 1 of the unit. When one set of two-driving-one machine group is completely stopped, the control valve set is closed, the first manual valves 5 on the two communication pipelines 4 are opened, and auxiliary steam in the other set of auxiliary steam header 1 which normally operates is conveyed to the auxiliary steam header 1 which completely stops in the machine group, so that the auxiliary steam header 1 which normally operates supplies a starting steam source to the auxiliary steam header 1 which completely stops in the machine group, time is saved, and cost is saved. In addition, when the steam supply of the auxiliary steam system of one two-driving-one combined set is abnormal, the third manual valve 9 of the abnormal steam supply set is closed, and the first manual valve 5 on the communication pipeline in the two-driving-one combined cycle sets is opened, so that the auxiliary steam can be supplied to the other set in time.
In summary, the present specification discloses an interconnected auxiliary steam system, each set of two-to-one combined cycle unit auxiliary steam systems are hooked to form an interconnected auxiliary steam system, and when one set of two-to-one combined cycle unit group completely stops, the other set of two-to-one combined cycle unit group supplies auxiliary steam to the other set of two-to-one combined cycle unit group, and meanwhile, when the steam supply of one set of two-to-one combined cycle unit group auxiliary steam system is abnormal, the other set of two-to-one combined cycle unit group auxiliary steam system can also supply auxiliary steam to the other set of two-to-one combined cycle unit group in time, so as to ensure the normal operation of the combined cycle unit. The unit of by supplementary steam system normal operating stops for the unit group completely or supplies the unusual unit of vapour to supply supplementary steam, the vapour source quality has the controllability, and stability is high, system architecture is simple, and the in-plant arrangement, the pipeline is shorter, and it is less to drain, and steam transport cost is low, and system installation cost is low, need not to purchase vapour outward, need not to start the stove, and the cost is cheap relatively, and the system is simple nimble, can deal with different situations, and the suitability is strong, has improved the security and the stability of supplementary steam system in the factory.
Those of ordinary skill in the art will understand that: the figures are schematic representations of one embodiment, and the blocks or processes in the figures are not necessarily required to practice the present invention.
Those of ordinary skill in the art will understand that: modules in the devices in the embodiments may be distributed in the devices in the embodiments according to the description of the embodiments, or may be located in one or more devices different from the embodiments with corresponding changes. The modules of the above embodiments may be combined into one module, or further split into multiple sub-modules.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.
Claims (5)
1. An interconnected auxiliary steam system, the auxiliary steam system comprising: the system comprises a plurality of auxiliary steam headers, a plurality of auxiliary steam self-supply pipelines, a starting steam source pipeline, a control valve group, a plurality of communication pipelines and a plurality of first manual valves; wherein:
each auxiliary steam header is respectively connected with one auxiliary steam self-supply pipeline and one communication pipeline; the plurality of communicating pipelines are converged and then are connected to one end of the starting steam source pipeline; the first manual valve is arranged on the communication pipeline; the other end of the starting steam source pipeline is communicated with a starting furnace and used for conveying starting steam generated by the starting furnace; the control valve group is arranged on the starting steam source pipeline and used for controlling the circulation of starting steam in the starting steam source pipeline.
2. The interconnected auxiliary steam system of claim 1, wherein the set of control valves includes a second manual valve, an electric valve, and a check valve.
3. The interconnected auxiliary steam system of claim 1, wherein the auxiliary steam is communicated from a supply line to an exhaust port of a high pressure cylinder of the steam turbine.
4. The interconnected auxiliary steam system of claim 1, further comprising a third manual valve disposed on the auxiliary steam self-supply conduit for controlling steam circulation within the auxiliary steam self-supply conduit.
5. The interconnected auxiliary steam system of claim 2 or 4, wherein the first, second, and third manual valves are all manual shut-off valves.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023025287.3U CN214119696U (en) | 2020-12-15 | 2020-12-15 | Mutually-communicated auxiliary steam system |
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| CN202023025287.3U CN214119696U (en) | 2020-12-15 | 2020-12-15 | Mutually-communicated auxiliary steam system |
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| CN214119696U true CN214119696U (en) | 2021-09-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115466827A (en) * | 2022-08-29 | 2022-12-13 | 武汉钢铁有限公司 | Double-plant three-unit combined heat storage RH vacuum refining steam system |
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- 2020-12-15 CN CN202023025287.3U patent/CN214119696U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115466827A (en) * | 2022-08-29 | 2022-12-13 | 武汉钢铁有限公司 | Double-plant three-unit combined heat storage RH vacuum refining steam system |
| CN115466827B (en) * | 2022-08-29 | 2023-08-18 | 武汉钢铁有限公司 | Double-factory three-unit combined heat storage RH vacuum refining steam system |
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