CN210485839U - Heat supply system - Google Patents
Heat supply system Download PDFInfo
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- CN210485839U CN210485839U CN201921206827.2U CN201921206827U CN210485839U CN 210485839 U CN210485839 U CN 210485839U CN 201921206827 U CN201921206827 U CN 201921206827U CN 210485839 U CN210485839 U CN 210485839U
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Abstract
The utility model discloses a heating system, including boiler, steam turbine, high-pressure bypass, low side valve, heat supply network heater, condenser, heat supply network extraction pipeline the steam turbine include high pressure cylinder, intermediate pressure cylinder and low pressure jar, the heat supply network heater passes through the heat supply network extraction pipeline with the intermediate pressure cylinder is linked together, low side valve with set up the pipe connection piece between the condenser, the low pressure bypass pass through pipe connection piece respectively with the condenser with the heat supply network extraction pipeline is linked together, pipe connection piece department sets up electric butterfly valve, electric butterfly valve's diameter with pipe connection piece's diameter is the same. The heating system can continue to supply heat to the heating network heater when the steam turbine fails.
Description
Technical Field
The utility model belongs to the heat supply field, specifically speaking relates to a heating system.
Background
With the continuous and deep implementation of the national policy of energy conservation and emission reduction, a thermal power plant equipped with a high-efficiency and environment-friendly cogeneration generator set becomes a main thermal source for heating and heat supply in winter in cities. Meanwhile, power generation enterprises also play an increasingly greater social responsibility, and whether the power generation enterprises can safely and stably supply heat is directly related to the social life and the public is motivated to cool and warm. Therefore, the safety and stability of the operation of the heat supply network system of the power generation enterprise are practically improved, the continuous heat supply of the main equipment of the steam turbine generator unit during the failure outage period is realized, the problem that the power generation enterprise fulfills social responsibility is further solved, the heat supply quantity in the city is seriously influenced after the failure unit of the steam turbine or the generator is in outage, and the steam can not meet the heat supply requirement in the city in severe cold days.
Chinese patent application No. CN201820824514.2 discloses an emergency heating system for realizing shutdown and non-shutdown of a large coal-fired generator set, which comprises a heat supply network heater, a heat supply network drain pump, a deaerator, a first regulating valve, a boiler, a second regulating valve, a high pressure cylinder, a high pressure bypass valve, an auxiliary steam header, a low pressure cylinder, a heat supply network heater and an intermediate pressure cylinder. However, the low-pressure bypass of the emergency heating system is not directly communicated with the heat supply network air exhaust pipeline, the pipeline design is complex, and the safety is low.
In view of this, the present invention is provided.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in overcoming prior art's not enough, provides a heating system, and this heating system still can continue to supply heat to the heat supply network heater when the steam turbine breaks down.
In order to solve the technical problem, the utility model adopts the following basic concept:
the utility model provides a heating system, includes boiler, steam turbine, high pressure bypass, low side valve, heat supply network heater, condenser, heat supply network extraction pipeline the steam turbine include high pressure jar, intermediate pressure jar and low pressure jar, the heat supply network heater passes through heat supply network extraction pipeline with the intermediate pressure jar is linked together, low side valve with set up the pipe connection spare between the condenser, the low pressure bypass pass through pipe connection spare respectively with the condenser with heat supply network extraction pipeline is linked together, pipe connection spare department sets up electric butterfly valve, electric butterfly valve's diameter with pipe connection spare's diameter is the same.
As an embodiment, the utility model discloses a drainage pump and oxygen-eliminating device, the entry of heat supply network heater with the heat supply network steam extraction pipeline is linked together, the export of heat supply network heater passes through the drainage pump is connected the condenser with between the oxygen-eliminating device.
As an embodiment, the utility model discloses a leading pump and low pressure feed water heater, the one end of oxygen-eliminating device is passed through low pressure feed water heater with the condenser is linked together, the other end with leading pump communicates mutually.
As an implementation mode, the utility model discloses a feed pump and high pressure feed water heater, the leading pump with the feed pump is linked together, the feed pump passes through high pressure feed water heater with the boiler is linked together.
As an implementation mode, a reducing pipeline is arranged between the pipeline connecting piece and the heat supply network steam extraction pipeline, and the reducing pipeline comprises a first pipeline communicated with the pipeline connecting piece and a second pipeline communicated with the heat supply network steam extraction pipeline.
As an embodiment, the first pipeline is communicated with the second pipeline through the reducing element.
In one embodiment, the first pipe has a pipe diameter smaller than the pipe diameter of the second pipe.
As an embodiment, the heat supply network steam extraction pipeline is provided with a heat supply quick-closing valve, and one end of the second pipeline is connected between the inlet of the heat supply network heater and the heat supply quick-closing valve.
In one embodiment, a flange is mounted at the joint of the first pipeline and the pipeline connecting piece and the joint of the second pipeline and the heat network steam extraction pipeline.
After the technical scheme is adopted, compared with the prior art, the utility model following beneficial effect has:
the utility model discloses be linked together low pressure bypass and heat supply network extraction of steam pipeline, when realizing generator or steam turbine trouble, the steam in the boiler can reach the heat supply network heater, supplies heat to the heat supply network heater, has improved heating system's reliability, and on the other hand, because a large amount of boiler steam directly supplies heat to the heat supply network heater, improves heat supply network heat supply temperature 15-20 ℃, satisfies the heat supply needs of extremely cold weather.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
fig. 1 is a schematic view of the piping of the heating system of the present invention;
fig. 2 is a schematic view of the heating system in case of a steam turbine failure according to the present invention.
In the figure: 1. a boiler; 2. a low pressure bypass; 3. a pipe connection; 4. a condenser; 5. a heat supply network heater; 6. a heat supply network steam extraction pipeline; 7. an intermediate pressure cylinder; 8. provided is a reducing pipeline.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept by those skilled in the art with reference to specific embodiments.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments, and the following embodiments are used for illustrating the present invention, but do not limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 and 2, a heating system comprises a boiler 1, a steam turbine, a low-pressure bypass 2, a low side valve, a heat supply network heater 5, a condenser 4, a heat supply network steam extraction pipeline 6, a drain pump, a deaerator, a pre-pump, a water feed pump, a low-pressure heater and a high heater, wherein the steam turbine comprises a high-pressure cylinder, a medium-pressure cylinder 7 and a low-pressure cylinder, the low-pressure bypass 2 is arranged behind the low side valve and is respectively communicated with the condenser 4 and the heat supply network steam extraction pipeline 6 through a pipeline connecting piece 3, an inlet of the heat supply network heater 5 is communicated with the heat supply network steam extraction pipeline 6, and an outlet of the heat supply network heater 5 is connected with the condenser 4 and the deaerator through the drain pump. When steam turbine or generator trouble stoppage in transit, the utility model discloses a will low pressure bypass 2 with heat supply network heater 5 be linked together, heat the heat supply network circulating water with the steam of low pressure bypass 2, guaranteed still can last the heat supply after steam turbine or generator trouble unit stoppage in transit.
Example 1
In this embodiment, a part of the main steam generated by the boiler superheater enters the high-pressure cylinder, another part of the main steam enters the high-pressure bypass connected in parallel with the high-pressure cylinder for temperature and pressure reduction, the steam after temperature and pressure reduction is merged with the exhaust steam of the high-pressure cylinder and enters the boiler reheater, a part of the reheated steam from the boiler reheater enters the intermediate pressure cylinder 7, another part of the reheated steam enters the low-pressure bypass 2, and the exhaust steam of the intermediate pressure cylinder 7 reaches the heat grid heater 5 through the heat grid steam extraction pipeline 6 for heating. When the steam turbine is in fault, the intermediate pressure cylinder 7 can not provide a heat source for the heat supply network heater 5 any more, and the low-pressure bypass 2 is communicated with the condenser 4 and the heat supply network steam extraction pipeline 6 through the pipeline connecting piece 3 after the low side valve, so that steam of the low-pressure bypass 2 can reach the heat supply network steam extraction pipeline 6 to continuously supply heat to the heat supply network heater 5.
Example 2
In this embodiment, the one end of oxygen-eliminating device with condenser 4 be linked together, the other end with the pre-pump communicate mutually, steam cooling back in the heat supply network heater 5 through the drain pump arrive the oxygen-eliminating device in carry out the deoxidization, the vapour source of oxygen-eliminating device comes from the auxiliary steam header, the steam of auxiliary header comes from the reheater cold section, thereby realizes the deoxidization function, the pre-pump improve the oxygen-eliminating device economy when the sliding pressure operation, ensure the operation safety of feed pump again simultaneously, with feed pump series operation, feed pump will carry boiler 1 from the feedwater in the pre-pump, before carrying boiler 1, in order to make the feedwater have certain temperature, need the high to add to carry out the heating, consequently the feed pump with the high and be linked together, the high add with boiler 1 be linked together.
Example 3
In this embodiment, the pipeline connector 3 divides the low-pressure bypass 2 into two paths, one path of the low-pressure bypass is communicated with the condenser 4, and the other path of the low-pressure bypass is communicated with the heat supply network steam extraction pipeline 6. In order to realize shutdown without stopping the boiler, an electric butterfly valve is arranged at the pipeline connecting piece 3, the diameter of the electric butterfly valve is the same as that of the pipeline connecting piece 3, when the steam turbine is normal, the electric butterfly valve automatically closes a pipeline communicated with a heat supply network steam extraction pipeline 6, and opens a pipeline communicated with the condenser 4, so that steam in the low-pressure bypass 2 can only enter the condenser 4 and cannot enter the heat supply network steam extraction pipeline 6; when the steam turbine is in failure, the electric butterfly valve automatically closes the pipeline communicated with the condenser 4, and simultaneously opens the pipeline communicated with the heat supply network steam extraction pipeline 6, so that the steam in the low-pressure bypass 2 can only enter the heat supply network steam extraction pipeline 6 and then enters the heat supply network heater 5 to supply heat to the heat supply network heater 5. The electric butterfly valve controls the opening and closing of the butterfly valve through a power signal, and is additionally provided with a manual control device, so that once a power failure occurs, manual operation can be performed temporarily, and the use is not influenced. The electric butterfly valve is a double-clip butterfly valve and a flange butterfly valve, the double-clip butterfly valve is formed by connecting a valve between two pipeline flanges through a stud bolt, the flange butterfly valve is provided with a flange on the valve, and the flanges at two ends of the valve are connected on the pipeline flanges through bolts.
Example 4
In this embodiment, the low-pressure bypass 2 is communicated with the heat supply network steam extraction pipeline 6, the pipeline communicating the low-pressure bypass 2 and the heat supply network steam extraction pipeline 6 is a variable diameter pipeline 8, the variable diameter pipeline 8 comprises a first pipeline and a second pipeline, the low-pressure bypass 2 and the first pipeline are phi 820 x 10, the pipeline connecting piece 3 is phi 820 x 10, the heat supply network steam extraction pipeline 6 and the second pipeline are phi 1020 x 10, the first pipeline is communicated with the pipeline connecting piece 3, the second pipeline is communicated with the heat supply network steam extraction pipeline 6, the first pipeline is communicated with the second pipeline through a variable diameter element, and the variable diameter element is a reducer.
Example 5
On the basis of the above embodiment 4, the joints of the first pipeline and the pipeline connecting piece 3 and the joints of the second pipeline and the heat supply network steam extraction pipeline 6 are both provided with flanges, wherein the low-pressure bypass 2 is welded and provided with a DN800 flange, and the heat supply network steam extraction pipeline 6 is welded and provided with a DN1200 flange, so that the safety and the steam tightness of the pipeline joints are ensured.
Example 6
In this embodiment, when the steam turbine fails, and the boiler 1 starts the steam turbine set without steam admission, the flow of the heat supply network heater 5 leading the steam is as follows: superheater outlet main steam → high-pressure bypass attemperation and depressurization → reheat cold section → reheat hot section → low-pressure bypass attemperation and depressurization → heat network extraction steam pipe 6 → heat network heater 5.
Example 7
In this embodiment, the heating system set up main steam valve, speed governing steam valve, high side valve, low side valve, high row check valve, middling pressure main steam valve, heat supply fast closing valve and low pressure heater outlet valve, avoid the steam in the boiler 1 to enter into high-pressure jar, intermediate pressure jar 7 and low pressure jar, realize the complete isolation of boiler steam and steam turbine body, guarantee the safety of steam turbine side, when the steam turbine broke down, main steam valve closes in the twinkling of an eye, high side valve and low side valve open rapidly, prevent the super-temperature superpressure to can continue the heating.
The equipment on the machine side is a main object for evaluation, and all main systems on the machine side are comprehensively evaluated, and the method is shown in table 1:
TABLE 1 comprehensive evaluation results of all major systems on machine side
From table 1 can know, appear not tight problem and when the steam turbine breaks down, the utility model discloses a heating system can not realize right the direct heating of heat supply network heater when the steam turbine breaks down in the heat supply interruption that oxygen-eliminating device or system trouble caused when the arbitrary valve that links to each other with the steam turbine.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and although the present invention has been disclosed with reference to the above preferred embodiment, but not to limit the present invention, any person skilled in the art can make modifications or changes to equivalent embodiments using the above-mentioned teachings without departing from the scope of the present invention, and the embodiments in the above embodiments can be further combined or replaced, but any simple modification, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention are also within the scope of the present invention.
Claims (9)
1. The utility model provides a heating system, includes boiler, steam turbine, high pressure bypass, low side valve, heat supply network heater, condenser, heat supply network extraction pipeline the steam turbine include high pressure jar, intermediate pressure jar and low pressure jar, the heat supply network heater is linked together its characterized in that through heat supply network extraction pipeline and intermediate pressure jar: a pipeline connecting piece is arranged between the low side valve and the condenser, the low pressure bypass is respectively communicated with the condenser and a heat supply network steam extraction pipeline through the pipeline connecting piece, an electric butterfly valve is arranged at the pipeline connecting piece, and the diameter of the electric butterfly valve is the same as that of the pipeline connecting piece.
2. A heating system according to claim 1, wherein: the steam-water separator comprises a drain pump and a deaerator, wherein an inlet of a heat supply network heater is communicated with a heat supply network steam extraction pipeline, and an outlet of the heat supply network heater is connected between the condenser and the deaerator through the drain pump.
3. A heating system according to claim 2, wherein: the low-pressure deaerator comprises a pre-pump and a low-pressure heater, wherein one end of the deaerator is communicated with a condenser through the low-pressure heater, and the other end of the deaerator is communicated with the pre-pump.
4. A heating system according to claim 3, wherein: the boiler water-feeding system comprises a water-feeding pump and a high-pressure heater, wherein the pre-pump is communicated with the water-feeding pump, and the water-feeding pump is communicated with a boiler through the high-pressure heater.
5. A heating system according to claim 1, wherein: a reducing pipeline is arranged between the pipeline connecting piece and the heat supply network steam extraction pipeline and comprises a first pipeline communicated with the pipeline connecting piece and a second pipeline communicated with the heat supply network steam extraction pipeline.
6. A heating system according to claim 5, wherein: the pipeline comprises a variable diameter element, and the first pipeline is communicated with the second pipeline through the variable diameter element.
7. A heating system according to claim 6, wherein: the first conduit has a conduit diameter that is less than the conduit diameter of the second conduit.
8. A heating system according to claim 7, wherein: the heat supply network steam extraction pipeline is provided with a heat supply quick closing valve, and one end of the second pipeline is connected between an inlet of the heat supply network heater and the heat supply quick closing valve.
9. A heating system according to claim 8, wherein: flanges are arranged at the joint of the first pipeline and the pipeline connecting piece and the joint of the second pipeline and the heat supply network steam extraction pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921206827.2U CN210485839U (en) | 2019-07-29 | 2019-07-29 | Heat supply system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921206827.2U CN210485839U (en) | 2019-07-29 | 2019-07-29 | Heat supply system |
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| CN210485839U true CN210485839U (en) | 2020-05-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114646084A (en) * | 2022-03-23 | 2022-06-21 | 润电能源科学技术有限公司 | Low-pressure bypass heating system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114646084A (en) * | 2022-03-23 | 2022-06-21 | 润电能源科学技术有限公司 | Low-pressure bypass heating system |
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