CN209761510U - Ultrahigh-pressure reheating-free steam extraction and condensing type 150MW steam turbine - Google Patents
Ultrahigh-pressure reheating-free steam extraction and condensing type 150MW steam turbine Download PDFInfo
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- CN209761510U CN209761510U CN201920738520.0U CN201920738520U CN209761510U CN 209761510 U CN209761510 U CN 209761510U CN 201920738520 U CN201920738520 U CN 201920738520U CN 209761510 U CN209761510 U CN 209761510U
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Abstract
An ultrahigh pressure reheating-free steam extraction condensing type 150MW steam turbine belongs to the field of steam turbines. The existing reheating type 150MW steam turbine has the problems of small steam extraction amount, complex machine-furnace configuration, high cost and the like. The utility model comprises a front bearing box, a high pressure cylinder, a middle bearing box, a communicating pipe, a low pressure cylinder, a rear bearing box, a high pressure main steam adjusting combination valve, a high pressure steam guide pipe and a end steam seal; the one end of high pressure jar is passed through the cat claw and is supported on the bearing box in the front, the other end of high pressure jar passes through the one end that the middle bearing box is connected at the low pressure jar, the other end and the rear bearing box of low pressure jar are connected, arrange two communicating pipes that set up side by side between high pressure jar and low pressure jar, the one end of communicating pipe is connected in the steam outlet of high pressure jar, the other end of communicating pipe passes through the compensation festival and connects in the steam inlet of low pressure jar, arrange a high pressure main vapour regulation joint valve respectively in the both sides of high pressure jar, every high pressure main vapour regulation joint valve leads the steam pipe to connect on the steam inlet of high pressure jar through two. The utility model is used for the electricity generation.
Description
Technical Field
the utility model belongs to the steam turbine field, concretely relates to superhigh pressure does not have reheat steam extraction condensing 150MW steam turbine.
Background
At present, a 150MW steam turbine in operation in the market mostly adopts a reheating mode, and main steam parameters mainly adopt pressure of about 13MPa and temperature of 535 ℃. The reheat type 150MW steam turbine has the problems of small steam extraction amount, complex machine furnace configuration, high cost and the like, and no non-reheat type 150MW steam turbine with the main steam temperature of 555 ℃ exists at present.
Disclosure of Invention
The utility model relates to a solve the current reheat formula 150MW steam turbine extraction volume little, the machine stove configuration is complicated and with high costs scheduling problem. The condensing steam turbine with the ultrahigh pressure, non-reheating and large extraction steam quantity of 150MW and the main steam temperature of 555 ℃ is provided.
The utility model adopts the technical proposal that:
The ultrahigh pressure reheating-free steam extraction condensing type 150MW steam turbine comprises a front bearing box 1, a high pressure cylinder 3, a middle bearing box 5, a communicating pipe 4, a low pressure cylinder 6, a rear bearing box 7, a high pressure main steam adjusting joint valve 9, a high pressure steam guide pipe 10 and an end steam seal;
One end of a high-pressure cylinder 3 is supported on a front bearing box 1 through a cat claw, the lower half of the high-pressure cylinder 3 is provided with a centering beam which is axially fixed with the front bearing box 1, the other end of the high-pressure cylinder 3 is connected with one end of a low-pressure cylinder 6 through a middle bearing box 5, the other end of the low-pressure cylinder 6 is connected with a rear bearing box 7, two communicating pipes 4 which are arranged in parallel are arranged between the high-pressure cylinder 3 and the low-pressure cylinder 6, one end of each communicating pipe 4 is connected with a steam outlet of the high-pressure cylinder 3, the other end of each communicating pipe 4 is connected with a steam inlet of the low-pressure cylinder 6 through a compensation joint, the steam inlets are positioned in the middle of the low-pressure cylinder 6, two sides of the high-pressure cylinder 3 are respectively provided with a high-pressure main steam adjusting joint valve 9, each high-pressure main steam adjusting joint valve 9 is connected with the steam inlets.
Further, the front bearing box 1 is supported on the front base frame by adopting a floor structure, the middle bearing box 5 and the rear bearing box 7 are both in the floor structure, and the middle bearing box 5, the rear bearing box 7 and the low-pressure cylinder 6 are supported on the rear base frame together.
further, the high-pressure cylinder 3 adopts an inner-outer double-layer cylinder structure, the high-pressure part is in 7-stage reverse arrangement and 10-stage forward arrangement, wherein the 7-stage reverse arrangement comprises a first-stage single-row adjusting stage and a 6-stage pressure stage, and the 10-stage forward arrangement comprises a 10-stage pressure stage.
Furthermore, the low-pressure cylinder 6 adopts a double-split double-layer cylinder structure, and the low-pressure part consists of 7-level reverse pressure levels and 7-level forward pressure levels.
Compared with the prior art, the utility model the beneficial effect who produces is:
1. The temperature of main steam of the unit is increased to 555 ℃, the degree of superheat of steam is increased to reduce the humidity of low-pressure partial steam, and the steam extraction amount is increased by 20%;
2. The steam system is simplified by adopting a non-reheating design, so that the equipment cost of a reheating valve, a boiler reheater and the like is saved;
3. the unit adopts the steam cylinder to perform baffling, so that the pressure loss of a baffling pipeline outside the cylinder is reduced.
Drawings
FIG. 1 is a schematic view of an overall structure of an extra-high pressure, reheat-free extraction and condensing type 150MW steam turbine;
FIG. 2 is a longitudinal cross-sectional view of FIG. 1;
Fig. 3 is a top view of fig. 1.
Detailed Description
the technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings:
The first embodiment is as follows: the embodiment is described with reference to fig. 1 to 3, and the ultra-high pressure reheat-free extraction condensing type 150MW steam turbine described in the embodiment includes a front bearing box 1, a high pressure cylinder 3, a middle bearing box 5, a communicating pipe 4, a low pressure cylinder 6, a rear bearing box 7, a high pressure main steam adjusting joint valve 9, a high pressure steam guide pipe 10 and an end steam seal;
One end of a high pressure cylinder 3 is supported on a front bearing box 1 through a cat claw, the lower half of the high pressure cylinder 3 is provided with a centering beam which is axially fixed with the front bearing box 1, the other end of the high pressure cylinder 3 is connected with one end of a low pressure cylinder 6 through a middle bearing box 5, the other end of the low pressure cylinder 6 is connected with a rear bearing box 7, one end of an inner rotor of the high pressure cylinder 3 is arranged in the front bearing box 1, the other end of the inner rotor of the high pressure cylinder 3 is arranged in the middle bearing box 5, one end of the inner rotor of the low pressure cylinder 6 is arranged in the middle bearing box 5, the other end of the inner rotor of the low pressure cylinder 6 is arranged in the rear bearing box 7, the other end of the rotor is connected with a generator, two communicating pipes 4 which are arranged in parallel are arranged between the high pressure cylinder 3 and the low pressure cylinder 6, one end of each communicating pipe 4 is connected with a steam outlet of the high pressure cylinder 3, the communicating pipe 4 is arranged at the top of the high-pressure cylinder 3 and the low-pressure cylinder 6, two sides of the high-pressure cylinder 3 are respectively provided with a high-pressure main steam adjusting combined valve 9, each high-pressure main steam adjusting combined valve 9 is connected to a steam inlet of the high-pressure cylinder 3 through two high-pressure steam guide pipes 10, and the steam inlet is positioned in the middle of the high-pressure cylinder 3.
in the embodiment, the unit is designed according to 7-stage heat regeneration, wherein the 1 st, 2 nd, 3 rd, 4 th and 5 th stage heat regeneration are designed in a high-pressure cylinder, the 6 th and 7 th stage heat regeneration are designed in a low-pressure cylinder, and the 3 rd stage heat regeneration is a deaerator.
the second embodiment is as follows: in the present embodiment, in order to ensure the stability of the shafting, the front bearing housing 1 is supported on the front base frame by adopting a landing structure, the middle bearing housing 5 and the rear bearing housing 7 are both in a landing structure, and the middle bearing housing 5, the rear bearing housing 7 and the low-pressure cylinder 6 are supported on the rear base frame together.
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. 2, the high-pressure cylinder 3 in the embodiment adopts an inner-outer double-layer cylinder structure, in order to balance thrust, the high-pressure part is arranged in 7-stage reverse direction and 10-stage forward direction, and the high-pressure part flows back in the cylinder, so that the pressure loss generated by the pipeline outside the cylinder is effectively reduced, wherein the 7-stage reverse direction is composed of a first-stage single-row adjusting stage and a 6-stage pressure stage, and the 10-stage forward direction is composed of a 10-stage pressure stage.
The high-pressure cylinder adopts a double-layer cylinder structure, so that the high-pressure cylinder adapts to the characteristics of the high-temperature working environment of the unit, the cylinder body is good in strength, good in rigidity and small in thermal stress, the high-pressure inner cylinder and the high-pressure outer cylinder are both cast, and the high-narrow flange structure is adopted to adapt to the requirement of quick start of the unit. High-pressure steam enters through flow from the middle of the cylinder, the temperature and the pressure of the front-end steam seal are effectively reduced, the axial size of the front-end steam seal of the rotor is reduced, and the risk of bending the rotor can be effectively reduced.
Other components and connection modes are the same as those of the first embodiment.
The fourth concrete implementation mode: the present embodiment is described with reference to fig. 2, and the low pressure cylinder 6 of the present embodiment has a double split double cylinder structure, and the low pressure portion is composed of 7 stages of reverse pressure stages and 7 stages of forward pressure stages.
The main steam enters the high-pressure cylinder after entering the main steam adjusting combined valve, flows through the high-pressure through-flow, then enters the low-pressure cylinder through a communicating pipe arranged at the top of the high-pressure cylinder, flows through the symmetrically arranged low-pressure through-flow, and then enters the condenser through the lower steam outlet.
The other components and the connection mode are the same as those of the first embodiment, the second embodiment or the third embodiment.
The utility model discloses the theory of operation:
The new steam enters two main steam regulating combined valves 9 arranged in front of the machine head (two sides of the high pressure cylinder), flows out of 4 regulating valves and enters the high pressure cylinder 3 through 4 high pressure steam guide pipes 10. The steam entering the high-pressure inner cylinder reversely flows through the first-stage single-row adjusting stage and the 6 pressure stages and is discharged from the high-pressure inner cylinder; steam flows into the 1 st pressure level of forward after the intermediate layer expands, after doing work through 10 pressure levels of forward, discharge from 2 high pressure steam vents at high-pressure cylinder rear portion, get into the low pressure jar through two communicating pipes 4, the low pressure jar is symmetrical double split structure, steam flows in from the middle part of low pressure jar, after each 7 pressure levels of forward and reverse, discharge downwards through the steam vent of low pressure jar and get into the condenser, steam condenses into water behind the condenser, the condensate water is beaten out by the condensate pump, pass through the gland cooler, the low pressure heater, the oxygen-eliminating device, get into high pressure heater and get back to the boiler after the pressurization of electronic feed pump.
Claims (4)
1. The utility model provides an ultrahigh pressure does not have reheat extraction condensing 150MW steam turbine which characterized in that: the device comprises a front bearing box (1), a high-pressure cylinder (3), a middle bearing box (5), a communicating pipe (4), a low-pressure cylinder (6), a rear bearing box (7), a high-pressure main steam adjusting joint valve (9), a high-pressure steam guide pipe (10) and an end steam seal;
One end of a high pressure cylinder (3) is supported on a front bearing box (1) through a cat claw, the lower half of the high pressure cylinder (3) is provided with a centering beam which is axially fixed with the front bearing box (1), the other end of the high pressure cylinder (3) is connected with one end of a low pressure cylinder (6) through a middle bearing box (5), the other end of the low pressure cylinder (6) is connected with a rear bearing box (7), two communicating pipes (4) which are arranged in parallel are arranged between the high pressure cylinder (3) and the low pressure cylinder (6), one end of each communicating pipe (4) is connected with a steam outlet of the high pressure cylinder (3), the other end of each communicating pipe (4) is connected with a steam inlet of the low pressure cylinder (6) through a compensation joint, the steam inlets are positioned at the middle position of the low pressure cylinder (6), two high pressure main steam adjusting joint valves (9) are respectively arranged on two sides of the high pressure cylinder (3), and each high pressure main steam adjusting joint valve (9) is connected with the steam inlet of the high pressure cylinder (3, the steam inlet is positioned in the middle of the high-pressure cylinder (3).
2. The ultra-high pressure, reheat-free extraction and condensing 150MW steam turbine of claim 1, wherein: the front bearing box (1) is supported on the front base frame by adopting a floor structure, the middle bearing box (5) and the rear bearing box (7) are of the floor structure, and the middle bearing box (5), the rear bearing box (7) and the low-pressure cylinder (6) are supported on the rear base frame together.
3. The ultra-high pressure, reheat-free extraction and condensing 150MW steam turbine of claim 1, wherein: the high-pressure cylinder (3) adopts an inner-outer double-layer cylinder structure, the high-pressure part is in 7-level reverse arrangement and 10-level forward arrangement, wherein the 7-level reverse arrangement is composed of a one-level single-row adjusting level and a 6-level pressure level, and the 10-level forward arrangement is composed of a 10-level pressure level.
4. the ultra-high pressure, reheat-free extraction and condensing 150MW steam turbine according to any one of claims 1 to 3, wherein: the low-pressure cylinder (6) adopts a double-split double-layer cylinder structure, and the low-pressure part consists of 7-level reverse pressure levels and 7-level forward pressure levels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920738520.0U CN209761510U (en) | 2019-05-21 | 2019-05-21 | Ultrahigh-pressure reheating-free steam extraction and condensing type 150MW steam turbine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920738520.0U CN209761510U (en) | 2019-05-21 | 2019-05-21 | Ultrahigh-pressure reheating-free steam extraction and condensing type 150MW steam turbine |
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| Publication Number | Publication Date |
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| CN209761510U true CN209761510U (en) | 2019-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920738520.0U Active CN209761510U (en) | 2019-05-21 | 2019-05-21 | Ultrahigh-pressure reheating-free steam extraction and condensing type 150MW steam turbine |
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| CN (1) | CN209761510U (en) |
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