CN214145586U - 100MW subcritical single-cylinder single-exhaust steam turbine - Google Patents
100MW subcritical single-cylinder single-exhaust steam turbine Download PDFInfo
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- CN214145586U CN214145586U CN202023336249.XU CN202023336249U CN214145586U CN 214145586 U CN214145586 U CN 214145586U CN 202023336249 U CN202023336249 U CN 202023336249U CN 214145586 U CN214145586 U CN 214145586U
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Abstract
The utility model provides a 100MW subcritical single cylinder single exhaust steam turbine, the utility model belongs to the steam turbine field of reforming transform, this utility model discloses a solve under the equal parameter unit type all be two jar single exhaust structures, the design is unreasonable, unit circulation efficiency is low, jar efficiency is low, the overall performance is poor, the problem of higher cost, it includes front bearing case, rear bearing case, high pressure main vapour regulation joint valve, middling pressure reheat regulation joint valve, high pressure cylinder, low-middle pressure jar, low pressure exhaust steam jar and rotor whole; high pressure jar, well low pressure jar and low pressure steam extraction jar fixed connection in order, the front bearing case is close to the high pressure jar setting, and the rear bearing case is close to the setting of low pressure steam extraction jar, and the rotor is whole to be set gradually in front bearing case, high pressure jar, well low pressure jar, low pressure steam extraction jar and rear bearing case, and the combination valve is adjusted to high pressure main vapour and the reheat regulation combination valve of middling pressure sets up the both sides of adjusting the combination valve at high pressure main vapour respectively, the utility model is used for the steam turbine field.
Description
Technical Field
The utility model belongs to the steam turbine field of reforming transform, concretely relates to subcritical single cylinder single exhaust steam turbine of 100 MW.
Background
Along with the continuous development of society, the continuous progress of industry level, current steam turbine shaping design is early, and the main steam parameter is low, can't satisfy present industrial production, for satisfying the required steam needs of current production, and the unit type all is two jars list steam exhaust structure to the equal parameter down to needle 100MW in the prior art, and the design is unreasonable, and unit circulation efficiency is low, jar inefficiency, and overall performance is poor, and the cost is higher.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve under the equal parameter unit pattern all be two jar single steam structures, the design is unreasonable, and unit circulation efficiency is low, jar inefficiency, and the totality performance is poor, the higher problem of cost, and then provide a 100MW subcritical single cylinder single steam turbine.
The technical scheme provided by the application for solving the problems is as follows:
the high-pressure main steam regulating combined valve comprises a front bearing box, a rear bearing box, a high-pressure main steam regulating combined valve, a medium-pressure reheating regulating combined valve, a high-pressure cylinder, a medium-low pressure cylinder, a low-pressure steam exhaust cylinder and a rotor whole; the high pressure cylinder, the medium and low pressure cylinder and the low pressure steam exhaust cylinder are fixedly connected in sequence, the front bearing box is arranged close to the high pressure cylinder, the rear bearing box is arranged close to the low pressure steam exhaust cylinder, the rotor is integrally and sequentially arranged on the front bearing box and the high pressure cylinder, the high-pressure main steam adjusting combination valve and the medium-pressure reheating adjusting combination valve are arranged on two sides of the high-pressure cylinder respectively, a steam outlet end of the high-pressure main steam adjusting combination valve is connected with the high-pressure cylinder, a steam inlet end of the high-pressure main steam adjusting combination valve is communicated with a boiler superheater, a steam inlet end of the medium-pressure reheating adjusting combination valve is communicated with a boiler reheater, a steam outlet end of the medium-pressure reheating adjusting combination valve is communicated with the medium-low pressure cylinder, the high-pressure module is arranged between a high-pressure cylinder body and a rotor body of the high-pressure cylinder, the medium-pressure module is arranged between the medium-low pressure cylinder body and the rotor body of the medium-low pressure cylinder, and the low-pressure module is arranged between the low-pressure steam exhaust pressure cylinder body and the rotor body of the low-pressure steam exhaust cylinder.
Compared with the prior art, the utility model following beneficial effect has:
1. the unit of this application is the single cylinder design, and is efficient, and the low pressure steam extraction jar unilateral is to the steam extraction down. The shafting length is shortened, the unit length is shortened to the maximum extent on the premise of ensuring high cycle efficiency and high safety of the unit, the occupied area of the unit is reduced, the space is saved, and the construction cost of a power plant is reduced.
2. This application unit adopts the nozzle to adjust, and steam gets into the high pressure cylinder through two high pressure regulating valves, and every governing valve corresponds 15 admission nozzles, improvement unit efficiency that can furthest.
3. Except the last two-stage baffle of low pressure in this application, all other high, well, all quiet leaf of low pressure, movable blade adopt to turn round assembled structure in advance, compare with traditional welding baffle, and the assembled structure does not have the welding seam, avoids welding deformation, has guaranteed the through-flow precision better.
4. The high-pressure double-layer cylinder structure is adopted in the high-pressure double-layer cylinder structure, the characteristics of the high-temperature working environment of the unit are adapted, the good strength, good rigidity and small thermal stress of the cylinder body are guaranteed, and the high-narrow flange structure is adopted to adapt to the requirement of quick start of the unit.
Drawings
Figure 1 is a schematic longitudinal section of a steam turbine according to the present application,
figure 2 is a top plan view of the steam turbine of the present application,
FIG. 3 is a front view of the steam turbine of the present application.
Detailed Description
The first embodiment is as follows: the embodiment is described with reference to fig. 1 to 3, and the embodiment provides a 100MW subcritical single-cylinder single-exhaust steam turbine, which comprises a front bearing box 1, a rear bearing box 2, a high-pressure main steam regulating combined valve 3, an intermediate-pressure reheating regulating combined valve 4, a high-pressure cylinder 5, a medium-low pressure cylinder 6, a low-pressure exhaust steam cylinder 7 and a rotor whole body 8; the high-pressure cylinder 5, the medium-low pressure cylinder 6 and the low-pressure steam exhaust cylinder 7 are fixedly connected in sequence, the front bearing box 1 is arranged close to the high-pressure cylinder 5, the rear bearing box 2 is arranged close to the low-pressure steam exhaust cylinder 7, the rotor whole 8 is sequentially arranged in the front bearing box 1, the high-pressure cylinder 5, the medium-low pressure cylinder 6, the low-pressure steam exhaust cylinder 7 and the rear bearing box 2, the high-pressure main steam regulation combination valve 3 and the medium-pressure reheating regulation combination valve 4 are respectively arranged at two sides of the high-pressure cylinder 5, the steam outlet end of the high-pressure main steam regulation combination valve 3 is connected with the high-pressure cylinder 5, the steam inlet end of the high-pressure main steam regulation combination valve 3 is communicated with a boiler superheater, the steam inlet end of the medium-pressure reheating regulation combination valve 4 is communicated with a boiler reheater, the steam outlet end of the medium-pressure reheating regulation combination valve 4 is communicated with the medium-low pressure cylinder 6, the high-pressure module is arranged between the high-pressure cylinder body of the high-pressure cylinder 5 and the rotor whole 8, the medium-pressure module is arranged between the medium-low-pressure cylinder body of the medium-low pressure cylinder 6 and the rotor whole 8, the low-pressure module is arranged between a low-pressure exhaust steam pressure cylinder body of the low-pressure exhaust steam pressure cylinder 7 and the rotor whole body 8.
The second embodiment is as follows: the embodiment is described with reference to fig. 1 to 3, and provides a 100MW subcritical single-cylinder single-exhaust steam turbine, wherein the rotor whole body 8 comprises a high-temperature-region rotor, a low-temperature-region rotor and a plurality of rotor connecting bolts, the high-temperature-region rotor and the low-temperature-region rotor are coaxially arranged along a linear direction, and one end of the high-temperature-region rotor and one end of the low-temperature-region rotor are fixedly connected through the plurality of rotor connecting bolts. Other components and connection modes are the same as those of the first embodiment.
The third concrete implementation mode: the embodiment is described with reference to fig. 1 to 3, and provides a 100MW subcritical single-cylinder single-exhaust steam turbine, wherein a front bearing box 1 and a rear bearing box 2 are both arranged on the ground, and a single dead point is arranged at the joint of the front bearing box 1 and a rotor whole body 8.
The clearance between the low-pressure end steam seal arranged on the low-pressure end steam seal and the rotor is not influenced by the deformation and the temperature of the low-pressure cylinder. The front section and the rear section have different mechanical properties, which not only meets the high-temperature strength requirement of the high-temperature section, but also meets the performances of the high strength and the low brittle transition temperature value of the low-temperature section. Other components and connection modes are the same as those of the first embodiment.
In this embodiment, the high-pressure main steam regulation combined valve 3 corresponds to a certain number of regulation stage nozzles, and the flow rate of the main steam entering the high-pressure cylinder 5 is controlled by the opening number and the opening degree of the high-pressure main steam regulation combined valve 3.
The fourth concrete implementation mode: the embodiment is described with reference to fig. 1 to 3, and provides a 100MW subcritical single-cylinder single-exhaust steam turbine, wherein a front bearing box 1 is supported on a base frame by adopting a floor structure, a high-pressure cylinder 5 adjusting end is supported on the front bearing box through a lower cat claw, and the cat claw is in sliding fit with the front bearing box. Other components and connection modes are the same as those of the third embodiment.
In the embodiment, the unit adopts a steam guide pipe design, and the flow of the reheated steam entering the middle-low pressure cylinder 6 is controlled by the steam reheated by the boiler through the middle-pressure reheating regulation combined valve 4.
The fifth concrete implementation mode: the embodiment is described with reference to fig. 1, and the embodiment provides a 100MW subcritical single-cylinder single-exhaust steam turbine, which further comprises two high-pressure steam inlet gas guide pipes 9 and two medium-pressure steam inlet gas guide pipes 10, the high-pressure main steam regulation combined valve 3 is communicated with a high-pressure cylinder body of a high-pressure cylinder 5 through the two high-pressure steam inlet gas guide pipes 9, one high-pressure steam inlet gas guide pipe 9 is communicated with the bottom of the high-pressure cylinder body, the other high-pressure steam inlet gas guide pipe 9 is communicated with the top of the high-pressure cylinder body, and the medium-pressure reheating regulation combined valve 4 is communicated with the bottom of a medium-low pressure cylinder body of a medium-low pressure cylinder 6 through the two medium-pressure steam inlet gas guide pipes 10. The other components and the connection mode are the same as those of the fourth embodiment.
The sixth specific implementation mode: referring to fig. 1 to 3, the embodiment is described, and provides a 100MW subcritical single-cylinder single-exhaust steam turbine, and each high-pressure steam inlet gas guide pipe 9 is communicated with a high-pressure cylinder body of a high-pressure cylinder 5 through fifteen steam inlet nozzles. Other components and connection modes are the same as those of the first embodiment.
The seventh embodiment: the embodiment is described with reference to fig. 1 to 3, and provides a 100MW subcritical single-cylinder single-exhaust steam turbine, two partition plates are mounted at the end part of a rotor whole body 8 close to a rear bearing box 2, and static blades and moving blades are mounted between the rotor whole body 8 in a high-pressure cylinder 5, a medium-low pressure cylinder 6 and a low-pressure exhaust steam pressure cylinder 7 by adopting a pre-twisted assembly structure. Compared with the traditional welding partition plate, the assembly type structure has no welding line, avoids welding deformation and better ensures the through-flow precision. Other components and connection modes are the same as those of the first embodiment.
The specific implementation mode is eight: the present embodiment is described with reference to fig. 1 to 3, and provides a 100MW subcritical single-cylinder single-exhaust steam turbine, and the high-pressure cylinder 5 has a double-cylinder structure.
The high-temperature working environment of the unit is adapted, the strength of the cylinder body is good, the rigidity is good, the thermal stress is small, and the high-narrow flange structure is adopted to adapt to the requirement of quick start of the unit. Other components and connection modes are the same as those of the first embodiment.
The specific implementation method nine: the embodiment is described with reference to fig. 1 to 3, and the embodiment provides a 100MW subcritical single-cylinder single-exhaust steam turbine, and the low-pressure exhaust steam cylinder 7 is welded by a steel plate tailor welding method. Other components and connection modes are the same as those of the first embodiment.
The detailed implementation mode is ten: the embodiment is described with reference to fig. 1 to 3, and provides a 100MW subcritical single-cylinder single-exhaust steam turbine, the single-exhaust steam turbine in the embodiment is an 8-stage regenerative mode, the 1 st stage and the 2 nd stage are thermally installed on the cylinder body of the high-pressure cylinder 5 through regenerative steam extraction pipelines, the 3 rd stage, the 4 th stage, the 5 th stage, the 6 th stage, the 7 th stage and the 8 th stage are thermally installed on the cylinder body of the medium-low pressure cylinder 6 through regenerative steam extraction pipelines, wherein the 4 th stage is a regenerative deaerator steam extraction pipeline. Compared with the subcritical single-cylinder single-exhaust steam turbine without 8-stage regenerative heat, the regenerative efficiency of the embodiment is improved by 3% -5%. Other components and connection modes are the same as those of the first embodiment.
Principle of operation
The steam turbine drives the generator to generate electricity, and mechanical energy is converted into electric energy.
At first, accomplish each part according to the relation of connection in the embodiment one to the embodiment ten and assemble, the utility model discloses at during operation steam is according to following sequence motion, come from boiler superheater's main steam, loop through high pressure main vapour regulation joint valve 3, high pressure admission air duct 9 gets into high-pressure cylinder 5, get into boiler reheater cold section through high-pressure cylinder steam vent after high-pressure cylinder 5 does work, reheat steam through reheat passes through middling pressure main vapour regulation joint valve 4 in proper order, middling pressure admission pipe 10 gets into low pressure cylinder 6, reheat steam discharges into the condenser through low pressure exhaust cylinder 7 after low pressure exhaust cylinder 6 has done work, accomplishes whole work process.
The utility model provides a 100MW subcritical single cylinder single exhaust steam turbine, long-term operation admission parameter are 16.7MPa 566 ℃/566 ℃, and the highest operational parameter is 16.7MPa 600 ℃/600 ℃, and high pressure main vapour regulation combination valve 3 participates in the regulation with middling pressure main vapour regulation combination valve 4 in real time, is equipped with eight levels and backheat and takes out the vapour. The steam turbine body adopts single cylinder list steam exhaust structure, shortens shafting length, under the prerequisite that the assurance unit has high cycle efficiency, high security, furthest shortens unit length, reduces unit area, practices thrift the space, reduces the construction cost of power plant.
Claims (9)
1. The utility model provides a 100MW subcritical single cylinder single exhaust steam turbine which characterized in that: the high-pressure main steam control system comprises a front bearing box (1), a rear bearing box (2), a high-pressure main steam adjusting combined valve (3), a medium-pressure reheating adjusting combined valve (4), a high-pressure cylinder (5), a medium-low pressure cylinder (6), a low-pressure steam exhaust cylinder (7) and a rotor whole body (8); the high-pressure cylinder (5), the medium-low pressure cylinder (6) and the low-pressure steam exhaust cylinder (7) are fixedly connected in sequence, the front bearing box (1) is arranged close to the high-pressure cylinder (5), the rear bearing box (2) is arranged close to the low-pressure steam exhaust cylinder (7), the rotor whole body (8) is sequentially arranged in the front bearing box (1), the high-pressure cylinder (5), the medium-low pressure cylinder (6), the low-pressure steam exhaust cylinder (7) and the rear bearing box (2), the high-pressure main steam regulation combination valve (3) and the medium-pressure reheating regulation combination valve (4) are respectively arranged on two sides of the high-pressure cylinder (5), the steam outlet end of the high-pressure main steam regulation combination valve (3) is connected with the high-pressure cylinder (5), the steam inlet end of the high-pressure main steam regulation combination valve (3) is communicated with the boiler superheater, the steam inlet end of the medium-pressure reheating regulation combination valve (4) is communicated with the boiler reheater, the steam outlet end of the medium-pressure reheating regulation combination valve (4) is communicated with the medium-low pressure cylinder (6), the high-pressure module is arranged between a high-pressure cylinder body of the high-pressure cylinder (5) and the whole rotor body (8), the medium-pressure module is arranged between a medium-low pressure cylinder body of the medium-low pressure cylinder (6) and the whole rotor body (8), and the low-pressure module is arranged between a low-pressure exhaust steam pressure cylinder body of the low-pressure exhaust steam cylinder (7) and the whole rotor body (8).
2. The 100MW subcritical single cylinder single exhaust steam turbine according to claim 1, wherein: the rotor whole body (8) comprises a high-temperature-region rotor, a low-temperature-region rotor and a plurality of rotor connecting bolts, the high-temperature-region rotor and the low-temperature-region rotor are coaxially arranged along the linear direction, and one end of the high-temperature-region rotor and one end of the low-temperature-region rotor are fixedly connected through the plurality of rotor connecting bolts.
3. The 100MW subcritical single cylinder single exhaust steam turbine according to claim 1, wherein: the front bearing box (1) and the rear bearing box (2) are arranged in a floor mode, and an independent dead point is arranged at the joint of the front bearing box (1) and the rotor whole body (8).
4. The 100MW subcritical single cylinder single exhaust steam turbine according to claim 3, wherein: the front bearing box (1) is supported on the base frame by adopting a floor structure, the adjusting end of the high-pressure cylinder (5) is supported on the front bearing box through a lower cat claw, and the cat claw is in sliding fit with the front bearing box.
5. The 100MW subcritical single cylinder single exhaust steam turbine according to claim 1, wherein: the high-pressure main steam adjusting combination valve comprises a high-pressure main steam adjusting combination valve body, a high-pressure main steam adjusting combination valve body and a medium-pressure reheating adjusting combination valve body, and is characterized by further comprising two high-pressure steam inlet air guide pipes (9) and two medium-pressure steam inlet air guide pipes (10), the high-pressure main steam adjusting combination valve body (3) is communicated with a high-pressure cylinder body of a high-pressure cylinder (5) through the two high-pressure steam inlet air guide pipes (9), one high-pressure steam inlet air guide pipe (9) is communicated with the bottom of the high-pressure cylinder body, the other high-pressure steam inlet air guide pipe (9) is communicated with the top of the high-pressure cylinder body, and the medium-pressure reheating adjusting combination valve body (4) is communicated with the bottom of a medium-low pressure cylinder body of a medium-low pressure cylinder (6) through the two medium-pressure steam inlet air guide pipes (10).
6. The 100MW subcritical single cylinder single exhaust steam turbine according to claim 1, wherein: each high-pressure steam inlet air duct (9) is communicated with a high-pressure cylinder body of the high-pressure cylinder (5) through fifteen steam inlet nozzles.
7. The 100MW subcritical single cylinder single exhaust steam turbine according to claim 1, wherein: two clapboards are installed at the end part of the rotor whole body (8) close to the rear bearing box (2), and the stator blades and the rotor blades are installed among the rotor whole body (8) in the high-pressure cylinder (5), the medium-low pressure cylinder (6) and the low-pressure steam exhaust pressure cylinder (7) by adopting a pre-twisting assembly structure.
8. The 100MW subcritical single cylinder single exhaust steam turbine according to claim 1, wherein: the high pressure cylinder (5) is a double-layer cylinder structure.
9. The 100MW subcritical single cylinder single exhaust steam turbine according to claim 1, wherein: the low-pressure exhaust steam cylinder (7) is formed by welding in a steel plate tailor welding mode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023336249.XU CN214145586U (en) | 2020-12-30 | 2020-12-30 | 100MW subcritical single-cylinder single-exhaust steam turbine |
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| CN202023336249.XU CN214145586U (en) | 2020-12-30 | 2020-12-30 | 100MW subcritical single-cylinder single-exhaust steam turbine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112627911A (en) * | 2020-12-30 | 2021-04-09 | 哈尔滨汽轮机厂有限责任公司 | 100MW subcritical single-cylinder single-exhaust steam turbine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112627911A (en) * | 2020-12-30 | 2021-04-09 | 哈尔滨汽轮机厂有限责任公司 | 100MW subcritical single-cylinder single-exhaust steam turbine |
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