CN216554044U - 600MW unit steam-heat output integrated device - Google Patents
600MW unit steam-heat output integrated device Download PDFInfo
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- CN216554044U CN216554044U CN202122854194.XU CN202122854194U CN216554044U CN 216554044 U CN216554044 U CN 216554044U CN 202122854194 U CN202122854194 U CN 202122854194U CN 216554044 U CN216554044 U CN 216554044U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
Abstract
The invention discloses a steam and heat output integrated device of a 600MW unit, which comprises a first pipeline and a second pipeline: the first pipeline and the second pipeline are connected with a middle exhaust main pipe, the first pipeline is provided with a first water spray regulating valve, the second pipeline is provided with a second water spray regulating valve, one side of the second pipeline is provided with a low-pressure cylinder steam inlet main pipe, the middle part of the low-pressure cylinder steam inlet main pipe is provided with a water spray temperature reducing device, the bottom ends of the first pipeline and the second pipeline are provided with a fifth section of air pumping pipeline and a sixth section of air pumping pipeline, the joint of the first pipeline and the fifth section of air pumping pipeline and the joint of the sixth section of air pumping pipeline are respectively provided with a first isolation valve and a second isolation valve, and the joint of the second pipeline and the fifth section of air pumping pipeline and the joint of the sixth section of air pumping pipeline are respectively provided with a third isolation valve and a fourth isolation valve. The utility model discloses a through carrying out heat supply integration transformation to 600MW unit, take the low pressure jar promptly and cut the jar, add little backpressure machine supply station power, well row industry steam supply, add a series of measures such as high-power roots vacuum pump, promote heat supply ability and peak regulation ability.
Description
Technical Field
The invention relates to the technical field of thermal power generation and cogeneration, in particular to a steam-heat output integrated device of a 600MW unit.
Background
The heat supply unit at the present stage is a 300 MW-grade unit basically, and compared with a 600MW unit, the heat supply unit has the advantages of small heat supply amount, high unit energy consumption level and large investment of a reconstruction unit. Therefore, the 600MW unit is subjected to heat supply transformation, the method has obvious advantages, at present, only a small part of the 600MW unit is subjected to heat supply transformation, the steam is basically perforated and extracted by a simple middle exhaust pipeline, integrated transformation such as zero output of a low pressure cylinder and steam supply by cascade utilization of backpressure is not carried out, and the heat supply amount, the peak regulation capacity and the energy saving effect have large promotion spaces;
because the heat supply demand constantly increases, and current 600MW unit energy consumption level is lower, the heat supply technique is also more ripe, consequently, it has been tendency to use 600MW straight condensing unit to carry out heat supply, because electric load also correspondingly increases when the heat supply capacity increases, great contradiction appears in heat supply and peak regulation, peak regulation ability is poor when leading to 600MW straight condensing unit heat supply, need carry out heat supply integration and reform transform, promptly in the heat supply output, still should carry out corresponding low cylinder zero output and reform transform, backpressure steam supply is reformed transform, thereby satisfy the needs of degree of depth peak regulation and energy cascade utilization.
Disclosure of Invention
Aiming at the technical problems in the related art, the invention provides a 600MW unit steam-heat output integrated system which can overcome the defects in the prior art.
In order to achieve the technical purpose, the technical scheme of the invention is realized as follows:
the utility model provides a 600MW unit vapour heat output integrated device, includes first low-pressure pipeline, second low-pressure pipeline, first low-pressure pipeline, second low-pressure pipeline all with well female union coupling of arranging, first low-pressure pipeline is equipped with first water spray governing valve, second low-pressure pipeline is equipped with second water spray governing valve, second low-pressure pipeline one side is equipped with the female pipe of low pressure jar admission, the female pipe middle part of low pressure jar admission is equipped with water spray attemperator, well arrange female pipe top and heat supply network supply vapour pipeline and industry and supply vapour pipe connection, the heat supply network supplies vapour pipeline one end and little backpressure machine of merit heat and heat supply network heater connection, the female pipe right side of low pressure jar admission is equipped with the intermediate pressure jar.
Furthermore, a fifth section of air pumping pipeline and a sixth section of air pumping pipeline are arranged at the bottom ends of the first low-pressure pipeline and the second low-pressure pipeline, a first isolation valve and a second isolation valve are respectively arranged at the connection positions of the first low-pressure pipeline and the fifth section of air pumping pipeline as well as the connection positions of the first low-pressure pipeline and the sixth section of air pumping pipeline, and a third isolation valve and a fourth isolation valve are respectively arranged at the connection positions of the second low-pressure pipeline and the fifth section of air pumping pipeline as well as the connection positions of the second low-pressure pipeline and the sixth section of air pumping pipeline.
Further, be equipped with the little backpressure machine of merit heat admission governing valve between heat supply network steam supply pipeline and the little backpressure machine of merit heat, the little backpressure machine of merit heat is connected with the heat supply network heater, be equipped with the little backpressure machine of merit heat exhaust isolation valve between the little backpressure machine of merit heat and the heat supply network heater, be equipped with the little backpressure machine bypass pipeline governing valve of merit heat between heat supply network heater and the heat supply network steam supply pipeline.
Furthermore, a medium pressure air inlet pipeline is arranged outside the medium pressure cylinder, the medium pressure cylinder is connected with the high pressure cylinder, the high pressure cylinder is connected with the high pressure air inlet pipeline, and high pressure exhaust is arranged at the bottom of the high pressure cylinder.
Furthermore, a second cooling steam regulating valve is arranged between the first low-pressure pipeline and the second low-pressure pipeline.
Furthermore, a first cooling steam regulating valve is arranged on one side of the second low-pressure pipeline.
The invention has the beneficial effects that: the utility model discloses a through carrying out heat supply integration transformation to 600MW unit, take promptly the low pressure jar to cut the jar, add little backpressure machine supply station power, well row industry steam supply, increase a series of measures such as high-power roots vacuum pump, promote heat supply ability and peak regulation ability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic diagram of a 600MW unit steam-heat output integrated device according to an embodiment of the invention.
In the figure: 1. a high pressure cylinder; 2. An intermediate pressure cylinder; 3. A water spray desuperheating device; 4. A heat supply network steam supply pipeline; 5. An industrial steam supply pipeline; 6. A second water spray regulating valve; 7. A first cooling steam regulating valve; 8. A second low pressure line; 9. A first water spray regulating valve; 10. A second cooling steam regulating valve; 11. A first low pressure line; 12. A power-heated small back press; 13. A heat supply network heater; 14. A third water spray regulating valve; 15. a fourth water spray regulating valve; 16. A first isolation valve; 17. a second isolation valve; 18. A third isolation valve; 19. A fourth isolation valve; 20. a bypass pipeline regulating valve of the power-heating small back pressure machine; 21. The steam inlet regulating valve of the power-heating small back pressure machine; 22. A power-heating small back pressure machine steam exhaust isolation valve; 23. and a middle row of mother pipes.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
As shown in fig. 1, the steam-heat output integrated device for a 600MW unit according to the embodiment of the present invention includes a first low-pressure pipeline 11 and a second low-pressure pipeline 8, both the first low-pressure pipeline 11 and the second low-pressure pipeline 8 are connected to a main intermediate steam exhaust pipe 23, the first low-pressure pipeline 11 is provided with a first water spray regulating valve 9, the second low-pressure pipeline 8 is provided with a second water spray regulating valve 6, one side of the second low-pressure pipeline 8 is provided with a main low-pressure cylinder steam intake pipe, the middle of the main low-pressure cylinder steam intake pipe is provided with a water spray temperature reducing device 3, the top of the main intermediate steam exhaust pipe is connected to a heat supply network steam supply pipeline 4 and an industrial steam supply pipeline 5, one end of the heat supply network steam supply pipeline 4 is connected to a small power-heat backpressure machine 12 and a heat supply network heater 13, and the right side of the main low-pressure cylinder steam intake pipe is provided with an intermediate pressure cylinder 2.
In a specific embodiment, a fifth section of air pumping pipeline and a sixth section of air pumping pipeline are arranged at the bottom ends of the first low-pressure pipeline 11 and the second low-pressure pipeline 8, a first isolation valve 16 and a second isolation valve 17 are respectively arranged at the connection positions of the first low-pressure pipeline and the fifth section of air pumping pipeline and the sixth section of air pumping pipeline, and a third isolation valve 18 and a fourth isolation valve 19 are respectively arranged at the connection positions of the second low-pressure pipeline 8 and the fifth section of air pumping pipeline and the sixth section of air pumping pipeline.
In a specific embodiment, a power and heat small back pressure machine steam inlet adjusting valve 21 is arranged between the heat supply network steam supply pipeline 4 and the power and heat small back pressure machine 12, the power and heat small back pressure machine 12 is connected with the heat supply network heater 13, a power and heat small back pressure machine steam exhaust isolation valve 22 is arranged between the power and heat small back pressure machine 12 and the heat supply network heater 13, and a power and heat small back pressure machine bypass pipeline adjusting valve 20 is arranged between the heat supply network heater 13 and the heat supply network steam supply pipeline 4.
In a specific embodiment, a medium pressure air inlet pipeline is arranged outside the medium pressure cylinder 2, the medium pressure cylinder 2 is connected with the high pressure cylinder 1, the high pressure cylinder 1 is connected with a high pressure air inlet pipeline, and high pressure exhaust is arranged at the bottom of the high pressure cylinder 1.
In the exemplary embodiment, a second cooling steam control valve 10 is provided between first low-pressure line 11 and second low-pressure line 8.
In the specific embodiment, a first cooling steam regulating valve 7 is arranged on one side of the second low-pressure pipeline 8.
In the embodiment, a third water injection regulating valve 14 is disposed at the bottom of the first low pressure pipeline 11, and a fourth water injection regulating valve 15 is disposed at the bottom of the second low pressure pipeline 8.
In order to facilitate understanding of the above-described technical aspects of the present invention, the above-described technical aspects of the present invention will be described in detail below in terms of specific usage.
When the device is used specifically, the heat supply quantity and the matching technology meeting deep peak regulation simultaneously are provided. Temperature measuring points are added at the last stage and the next last stage of the low-pressure pipeline, and the vibration, the blade top clearance and the expansion difference of the blades can operate in a normal range as long as the temperature is controlled. The length of the last stage blade is 1016mm, the strength can meet the requirement of cylinder cutting, spraying can be carried out, and the water erosion resistance is improved.
The low-pressure cylinder is transformed with zero output, so that deep peak regulation and heat supply capacity increase can be realized.
The back pressure machine is added to the heat supply network steam extraction pipeline to supply service power to realize the energy gradient utilization technology.
The heating steam extraction point of the domestic cogeneration unit is generally positioned at the last stage of the intermediate pressure cylinder, and the larger the unit capacity is, the higher the heating steam extraction parameter is, and the larger the pressure difference energy loss is. The medium discharge pressure is rated as 1.0MPa, the superheated steam works through the small power heating back pressure machine 12, the energy loss in the heat supply system is extracted, the part of energy is converted into kinetic energy to drag a load, the plant power consumption rate is reduced, and the energy-saving purpose is achieved. The extracted steam of the heat supply network enters the small power-heat back-pressure machine 12, and the exhausted steam of the small power-heat back-pressure machine 12 is sent to a steam inlet of a heat supply network heater 13 corresponding to the host machine. A bypass pipeline regulating valve 20 of the power and heat small back pressure machine is arranged, and if the steam extraction flow of the main machine exceeds the maximum steam inlet flow of the power and heat small back pressure machine, the exceeding part of steam can be sent to the front of an inlet regulating valve of a heat supply network heater through the bypass steam extraction pipeline 20; when the power-heating small back pressure machine is in a stop state, the steam inlet regulating valve 21 and the steam exhaust isolation valve 22 from the main machine to the steam exhaust pipe of the back pressure machine are closed, and the extracted steam directly enters the heating network heater through the bypass 20.
The medium-exhaust industrial steam supply technology.
The medium discharge pressure is rated to be 1.0MPa, and can meet the industrial steam supply requirement of 5, and the pressure matching can be carried out from the high discharge, and the steam supply requirement can be met when the load is low. One path of steam supply pipeline, a corresponding steam supply check valve, a partition door and an adjusting door are respectively added in the middle exhaust and the high exhaust, pressure adjustment is carried out on a pressure matcher, the energy consumption level can be reduced, the steam supply quantity can be increased, and the defects that the high exhaust steam supply quantity is limited and the safety of hot re-steam supply quantity adjustment is not high are overcome.
High-power Roots vacuum pump technology
By additionally arranging the high-power Roots vacuum pump, the exhaust back pressure of the air cooling unit can be reduced, the low-pressure cylinder can be cut off to operate more favorably, the exhaust cylinder does not spray water or sprays less water, and the water erosion harm of the blades is reduced.
In summary, according to the above technical solutions of the present invention:
the heating capacity is increased. After the transformation, the steam inlet of the two low-pressure cylinders needs 60T/H of cooling flow, the steam exhaust of the intermediate-pressure cylinder can be used for heat supply, and theoretically, the single-machine heat supply steam extraction amount can be 1057T/H at present.
And the loss of a cold source of the unit is reduced. After the low-pressure cylinder is cut off, only 60t/h of cooling flow is needed, so that the steam exhaust heat loss of the low-pressure cylinder is greatly reduced, the cold source loss of a unit is reduced, and the coal consumption for power generation is greatly reduced;
and realizing deep peak regulation. Due to the fact that the low-pressure cylinder is cut off to operate, the electric load is reduced under the condition that the heat supply amount is increased, and deep peak regulation is achieved;
the operation mode is flexible. In the peak regulation process, the operation of cutting and switching the low-pressure cylinder can be carried out according to the requirement, the operation amount is small, the time is short, and the peak regulation requirement of a power grid can be met. The system and the equipment can be flexibly switched in a condensing, pumping and backing mode without major transformation;
the safety is high. When the low-pressure cylinder is cut off, if the heat supply network fails, the low-pressure cylinder can be put into operation in time, and the operation safety of the main engine is ensured.
The extraction energy of the heat supply network is utilized in a gradient manner, the superheated steam works through a small steam turbine, the energy loss in a heat supply system is extracted, the energy is converted into kinetic energy to drag a load, the plant power consumption rate is reduced, and the energy-saving aim is achieved.
And the middle exhaust is used for industrial steam. The medium exhaust pressure is rated to be 1.0MPa, the requirement of industrial steam supply can be met, the industrial steam supply at the present stage is basically high exhaust steam supply, or the temperature and pressure are reduced again, compared with the medium exhaust steam supply, the energy consumption level can be reduced, the steam supply amount can be increased, and the defects of limitation of high exhaust steam supply amount and low safety of adjustment of the heat re-steam supply amount are overcome.
By adding the high-power Roots vacuum pump to replace a raw water ring pump, energy can be saved, the pumping capacity can be improved, the unit backpressure is reduced, the cooling flow is reduced after the low-pressure cylinder is cut off after the unit backpressure is reduced, no water or less water is sprayed to the exhaust cylinder, and the water erosion hazard of the blade is reduced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A600 MW unit steam-heat output integrated device is characterized by comprising a first low-pressure pipeline (11) and a second low-pressure pipeline (8), the first low-pressure pipeline (11) and the second low-pressure pipeline (8) are both connected with the middle row of main pipes (23), the first low-pressure pipeline (11) is provided with a first water spray regulating valve (9), the second low-pressure pipeline (8) is provided with a second water spray regulating valve (6), a low-pressure cylinder steam inlet main pipe is arranged at one side of the second low-pressure pipeline (8), a water spray temperature reduction device (3) is arranged in the middle of the low-pressure cylinder steam inlet main pipe, the top of the middle row main pipe is connected with a heat supply network steam supply pipeline (4) and an industrial steam supply pipeline (5), one end of the heat supply network steam supply pipeline (4) is connected with the power heating small back press machine (12) and the heat supply network heater (13), and the middle pressure cylinder (2) is arranged on the right side of the low pressure cylinder steam inlet main pipe.
2. The steam-heat output integrated device for the 600MW unit according to claim 1, wherein a fifth section of air extraction pipeline and a sixth section of air extraction pipeline are arranged at the bottom ends of the first low-pressure pipeline (11) and the second low-pressure pipeline (8), a first isolation valve (16) and a second isolation valve (17) are respectively arranged at the connection positions of the first low-pressure pipeline (11) and the fifth section of air extraction pipeline and the sixth section of air extraction pipeline, and a third isolation valve (18) and a fourth isolation valve (19) are respectively arranged at the connection positions of the second low-pressure pipeline (8) and the fifth section of air extraction pipeline and the sixth section of air extraction pipeline.
3. The steam-heat output integrated device of the 600MW unit according to claim 1, wherein a steam inlet regulating valve (21) of the small power-heat backpressure machine is arranged between the steam supply pipeline (4) of the heat supply network and the small power-heat backpressure machine (12), the small power-heat backpressure machine (12) is connected with the heat supply network heater (13), a steam exhaust isolation valve (22) of the small power-heat backpressure machine is arranged between the small power-heat backpressure machine (12) and the heat supply network heater (13), and a bypass pipeline regulating valve (20) of the small power-heat backpressure machine is arranged between the heat supply network heater (13) and the steam supply pipeline (4).
4. The steam-heat output integrated device for the 600MW unit according to claim 1, wherein a medium pressure air inlet pipeline is arranged outside the medium pressure cylinder (2), the medium pressure cylinder (2) is connected with the high pressure cylinder (1), a high pressure air inlet pipeline is connected outside the high pressure cylinder (1), and a high pressure exhaust is arranged at the bottom of the high pressure cylinder (1).
5. The steam-heat output integrated device of the 600MW unit according to claim 1, wherein a second cooling steam regulating valve (10) is arranged between the first low-pressure pipeline (11) and the second low-pressure pipeline (8).
6. The steam-heat output integrated device of the 600MW unit according to claim 5, wherein a first cooling steam regulating valve (7) is arranged on one side of the second low-pressure pipeline (8).
7. The steam-heat output integrated device for the 600MW unit according to claim 1, wherein a third water spray regulating valve (14) is arranged at the bottom of the first low-pressure pipeline (11), and a fourth water spray regulating valve (15) is arranged at the bottom of the second low-pressure pipeline (8).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122854194.XU CN216554044U (en) | 2021-11-22 | 2021-11-22 | 600MW unit steam-heat output integrated device |
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| CN202122854194.XU CN216554044U (en) | 2021-11-22 | 2021-11-22 | 600MW unit steam-heat output integrated device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114810250A (en) * | 2022-04-14 | 2022-07-29 | 重庆赛迪热工环保工程技术有限公司 | Power generation thermodynamic system for reducing heat loss of steam turbine exhaust |
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2021
- 2021-11-22 CN CN202122854194.XU patent/CN216554044U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114810250A (en) * | 2022-04-14 | 2022-07-29 | 重庆赛迪热工环保工程技术有限公司 | Power generation thermodynamic system for reducing heat loss of steam turbine exhaust |
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