CN202090960U - Wet steam waste heat power generation steam turbine - Google Patents
Wet steam waste heat power generation steam turbine Download PDFInfo
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- CN202090960U CN202090960U CN2011202126330U CN201120212633U CN202090960U CN 202090960 U CN202090960 U CN 202090960U CN 2011202126330 U CN2011202126330 U CN 2011202126330U CN 201120212633 U CN201120212633 U CN 201120212633U CN 202090960 U CN202090960 U CN 202090960U
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Abstract
The utility model discloses a wet steam waste heat power generation steam turbine, which belongs to the field of steam turbines. In order to resolve the problem that service life of an existing steam turbine is affected because the steam turbine works in a wet steam environment, and suffers cavitations and erosions, the wet steam waste heat power generation steam turbine comprises a cylinder, a steam chamber connected to the cylinder and an integral rotor installed inside the cylinder through a front bearing and a rear bearing. A nozzle is installed at the front end of the cylinder, multistage ladder-like moving blades are installed on the integral rotor, a separating plate disposed on the inner wall of the cylinder is respectively arranged between every two adjacent stages of moving blades, and dehumidification grooves are arranged on inlet edges and outlet edges of outer rings of part of the separating plates. The steam turbine is capable of making fuller use of low-grade saturated steam for waste heat generation, compact in structure, light in weight, low in cost, good in effect, simple and convenient to operate, capable of dehumidifying, resistant to corrosion and erosion, long in service life, easy to install and debug, convenient to maintain, energy-saving and environment-friendly.
Description
Technical field
The utility model relates to a kind of steam turbine, is specially a kind of wet vapor cogeneration steam turbine.
Background technique
Be called wet steam turbine with the steam of saturation state as the steam turbine of initial steam, this wet steam turbine and is widely used in geothermal power power plant and other relevant industries in the nuclear power station and nuclear power ships of industrial exhaust heat, nuclear reactor type.Because the wet vapor pressure and temp is lower, the available heat (enthalpy drop) that takes place when the steam of unit mass expands in steam turbine lacks half approximately, be that the required live steam mass flow rate of specific power is big approximately 1 times, low because of initial steam pressure again, volume flow is big approximately 3 times, and the enthalpy drop of wet steam turbine steam causes progression required in the steam turbine to reduce than conventional steam turbine much less thus, advances the steam discharge part simultaneously and increases 1 times relatively.The flow area of corresponding final stage moving blade, final stage stator blade increases 1 times, so final stage sound blade is the design key of wet steam turbine.Because the specific enthalpy of saturated vapour and wet vapor is lower, so consumption of steam is many, in order to satisfy the big requirement of exhaust passage, cylinder steam-expelling port last stage movable vane and stator blade lengthening design after must increasing.
In addition, steam turbine is at different levels all works under the wet vapor environment, often can see that the working surface of moving vane and stator blade is caused metal to come off by water erosion, thereby cause the vibration of blade and the change of strength characteristics, even cause interruption of services such as leaf destruction.And the small water droplet of wet vapor not only influences Efficiency of Steam Turbine under the high speed rotating, and turbine component is had very big abrasion, and souring influences working life of steam turbine.Therefore in steam turbine, produce a large amount of moisture content in the expansion acting process in order to eliminate or to reduce steam, must be provided with during design and remove wet device.
Simultaneously, the power-saving technology that country of low-grade steam waste heat generation technology actively encourages, widelys popularize has splendid society and economic benefit.Low-grade steam waste heat generating is to produce steam by reclaiming the useless flue gas of the middle low temperature that discharges in the industry production processes such as iron and steel, cement, papermaking, glass, petrochemical industry by exhaust heat boiler, and being generated electricity by the tow taste heat that produces steam gained more than needed in the production process is a high-efficiency energy-saving technology of turning waste into wealth.This technology obtains the support energetically of national correlation department mechanism, therefore researches and develops novel wet steam turbine, and is imperative.
Summary of the invention
Work under the wet vapor environment in order to overcome existing steam turbine, easily influenced Efficiency of Steam Turbine by the small water droplet of wet vapor, and turbine component is caused cavitation, washes away, influence the deficiency in working life, the utility model aims to provide a kind of wet vapor cogeneration steam turbine, and this steam turbine removes wet sump, corrosion protection by being provided with, protection against erosion, long service life.
To achieve these goals, the technological scheme that the utility model adopted is: described wet vapor cogeneration steam turbine, comprise cylinder and the vaporium that is connected with cylinder, and be contained in integral rotor in the cylinder by bearing; Described cylinder front end is equipped with nozzle, its structural feature is, the multistage moving vane that ladder is arranged that is is housed on the described integral rotor, between every adjacent two-stage moving vane, is provided with the dividing plate that is contained on the cylinder inner wall, and the inlet side of part dividing plate outer shroud is provided with except that wet sump with the outlet limit.
Described cylinder is made up of cylinder under preceding upper cylinder half, back upper cylinder half, preceding cylinder down, the back, and this preceding upper cylinder half, back upper cylinder half, preceding cylinder down, back connect by flange between the cylinder down.
Wherein, the throttle (steam) temperature of described steam turbine is preferably 150 ℃ ~ 190 ℃, and vapor pressure is 0.5MPa ~ 1.1MPa.
As to further improvement of the present invention:
Seven grades of moving vanes preferably are housed on the described integral rotor, wherein preceding Pyatyi moving vane is the uniform section prismatic blade, six, seven grades of moving vanes are the bent blade of variable cross section, and the root of described six, seven grades of moving vanes is a bulbous root, makes smaller, the compact structure of steam turbine type thus.
Further, described dividing plate preferably has six grades of dividing plates, and wherein the inlet side of the 5th, six grade of dividing plate outer shroud and outlet limit are respectively equipped with except that wet sump, and the axial groove width of removing wet sump is 0.1mm ~ 0.15mm, and the blade of the 5th, six grade of dividing plate is thick to be 4.5mm ~ 6mm.
Further, be respectively equipped with forward and backward packing between the front end and back end of described integral rotor and the cylinder inner wall, the radially total backlash between this forward and backward packing and the cylinder is 0.3mm ~ 0.4mm.
Regulate the rotating speed of integral rotor for convenience, plate valve is carried in the employing that is located at the air inflow of control steam turbine on the described cylinder, this aperture of carrying plate valve is regulated by an electrohydaulic speed governor system, and the rotating speed of described integral rotor is 6500rpm ~ 11000rpm, and suitable power is 1500kW-4500kW.
By said structure, the ladder form is pressed in second design of cylinder, adopts and removes wet sump and remove the water hole design, and ponding in the cylinder can in time be discharged the suction condenser.
Five, wet vapor working area, six grades of dividing plate positions, the steam that the flows through water droplet that to freeze-out, strike is on blade inlet edge, of a specified duration can cause the water erosion phenomenon, in order to prevent blade erosion, be equipped with the above-mentioned wet sump that removes in the inlet side of dividing plate outer shroud and outlet limit, import and export water droplet in the steam to collect movable vane, by the back down each aperture of cylinder bottom dredge through condenser.Before the steam turbine admission, increase steam trap, can solve the effect on moisture extraction that under the minimum pressure loss, has maximum.Wet steam turbine design dehumidifying just seems very important.By the condenser pumping action, its dehumidifying effect is strengthened greatly,
Compared with prior art, the beneficial effects of the utility model are: this steamer function utilizes low-grade saturated vapour to carry out cogeneration more fully, its compact structure, in light weight, cost is low, and is effective, easy and simple to handle, the dehumidifying corrosion protection, protection against erosion, long service life, easily Installation and Debugging, easy to maintenance, and have numerous advantages such as high rotating speed, thermal efficiency height, energy-conserving and environment-protective.
Below in conjunction with drawings and Examples the utility model is further elaborated.
Description of drawings
Fig. 1 is a kind of embodiment's of the utility model a structural representation;
Fig. 2 is the structural representation of dehumidifier described in the utility model;
Fig. 3 is the structural representation of bulbous root described in the utility model.
In the drawings
The 1-rear bearing block; Upper cylinder half behind the 2-; Upper cylinder half before the 3-;
The 4-nozzle; 5-carries plate valve; 6-electrohydaulic speed governor system;
The 7-front-end bearing pedestal; The 8-emergency overspeed governor; Flexible plate before the 9-;
The 10-radial bearing; 11-tile fragment formula thrust-bearing; The 12-tachometer disc;
The 13-vaporium; The 14-front steam seal; Cylinder under before the 15-;
Cylinder under behind the 16-; Flexible plate behind the 17-; The 18-rear bearing;
The 19-rotor; 20-dividing plate vapour; 21-one-level dividing plate;
22-secondary dividing plate; Three grades of dividing plates of 23-; 24-level Four dividing plate;
25-Pyatyi dividing plate; Six grades of dividing plates of 26-; 27-one-level moving vane;
28-secondary moving vane; Three grades of moving vanes of 29-; 30-level Four moving vane;
31-Pyatyi moving vane; Six grades of moving vanes of 32-; Seven grades of moving vanes of 33-;
34-removes wet sump for six grades; 35-removes wet sump for seven grades; 36-removes the water hole;
The 37-bulbous root; The 38-valve head; Packing behind the 39-.
Embodiment
A kind of wet vapor cogeneration steam turbine as illustrated in fig. 1 and 2, comprises by preceding upper cylinder half 3, back upper cylinder half 2, preceding down cylinder 15, back cylinder 16 cylinder of forming and the vaporium 13 that is connected with cylinder down, is contained in integral rotor 19 in the cylinder by bearing; Be respectively equipped with forward and backward packing 14,39 between the front end and back end of described integral rotor 19 and the cylinder inner wall, the radial clearance between this forward and backward packing 14,39 and the cylinder is 0.3mm ~ 0.4mm.Described cylinder front end is equipped with nozzle 1, be equipped with seven grades on the described integral rotor 19 and be the moving vane 27 that ladder is arranged, 28,29,30,31,32,33, between every adjacent two-stage moving vane, be provided with the dividing plate that is contained on the cylinder inner wall, totally six grades of dividing plates 21,22,23,24,25,26, and the inlet side of the 5th, six grade of dividing plate 25,26 outer shrouds and outlet limit are provided with except that wet sump 34,35.The described axial groove width of removing wet sump 34,35 is 0.1 mm ~ 0.15mm, five, the material of six grades of dividing plates is preferably 2Cr13, five, the blade of six grades of dividing plates 25,26 is thick is 4.5mm ~ 6mm, adopt quenching with Subsequent tempering HB229-277, outer flow passage surface nitrocarburizing is handled, nitride layer depth is 0.1mm ~ 0.15mm, and surface hardness is HV 〉=900, and fragility is no more than 2 grades.
As shown in Figure 2, seven grades of moving vanes preferably are housed, preceding Pyatyi moving vane 27 on the described integral rotor 19,28,29,30,31 is the uniform section prismatic blade, six, seven grades of moving vanes 32,33 is the bent blade of variable cross section, as shown in Figure 3, and described six, seven grades of moving vanes 32,33 root is a bulbous root 37, does not use at home.Wherein the material of the 6th, seven grade of moving vane 32,33 is preferably 1Cr12WMoV, and the flow passage component of blade and blade profile place adopt inner quenching with Subsequent tempering HB269-311, the outer surface nitrocarburizing is handled, nitride layer depth is 0.1mm ~ 0.15mm, and surface hardness is HV 〉=900, and fragility is no more than 2 grades.
By to measures such as modified, the nitrocarburizing processing of blade and dividing plate, make blade and dividing plate possess the function of protection against erosion, strengthened the protection against erosion ability of steam turbine widely.
The throttle (steam) temperature of described steam turbine is 150 ℃ ~ 190 ℃, and vapor pressure is 0.5MPa ~ 1.1MPa.One end of described integral rotor 19 is equipped with tachometer disc 12, and the rotating speed of steam turbine is by 6 controls of electrohydaulic speed governor system, and speed control system preferably adopts the ZT2000-1A type speed control system of WOODWARD company, and the rotating speed of integral rotor 19 is 6500rpm ~ 11000rpm.
Described bearing 10 is five radially tilting-pad bearings, tilting pad formula thrust-bearing 11 more preferably, and the both sides symmetry can be born the thrust of both direction.This tilting pad formula thrust-bearing top-pour is cast with ASTM-B23.2 level Babbitt.
Referring to accompanying drawing 1, preceding cylinder 3,15 and front-end bearing pedestal 7 are designed to integral body, and exhaust casing 2,16 is designed to integral body with rear bearing block 1.Because of throttle flow is bigger, be located on the described cylinder control steam turbine air inflow carry plate valve 5 and four valve heads 38, this aperture of carrying plate valve 5 is regulated by electrohydaulic speed governor system 6, thereby reaches the rotating speed by the size adjustment integral rotor 19 of control air inflow.
Described electrohydaulic speed governor system 6 is by the control of PLC programmed control system, and steam turbine control system adopts SDH-6, and this steam turbine also comprises safety monitoring system, emergency trip system, alarm system and protective system.Described safety monitoring system preferably adopts TSI type safety monitoring system, and the emergency trip system adopts ETS type emergency trip system, and protective system is the emergency overspeed governor 8 that is arranged on integral rotor 19 1 ends.
Certain Iron And Steel Plant's converter and heating-furnace cogeneration project, the waste steam that comes by multichannel enters steam-water separator, after contained humidity separation in the steam, by doing work in main stop valve, the modulating valve admission turbine, drive speed reducer and generator, steam is finished merit in steam turbine after, be discharged in the condenser, be condensed into behind the water feed water pump and get to oxygen-eliminating device and handle the back feed water pump and return process system, form a cover circulation system.161 ℃ of vapor (steam) temperatures, vapor pressure 0.64MPa, steam flow 12-29 ton/hour.The power of selected two units is 1500KW, realizes energy-saving effect.
Generator set estimates that by calculating in annual 8000 hours gross generation reaches 2,400 ten thousand KW/, and single 0.5 yuan/KWh estimates that annual saving benefit is 1,200 ten thousand yuan/year, saves 25600 tons/year in mark coal, and by 650 yuan/jin, then income is 16,640,000 yuan/year.Equipment investment can be regained then, creates relatively considerable economic and social benefit.
The utility model is on major company bases such as Siemens, Mitsubishi heavy industry, AM General, U.S. Te Lawa, comprehensive various saturated vapour condensing turbine design advantage, carry out design selection and parameter designing, its maximum characteristics are waste vapour, low grade heat energy abundant more, that effectively utilize in enterprise's technological process to do cogeneration.
The content that the foregoing description is illustrated should be understood to these embodiments and only is used to be illustrated more clearly in the utility model, and be not used in the restriction scope of the present utility model, after having read the utility model, those skilled in the art all fall within the application's claims institute restricted portion to the modification of the various equivalent form of values of the present utility model.
Claims (10)
1. a wet vapor cogeneration steam turbine comprises cylinder and the vaporium that is connected with cylinder (13), is contained in integral rotor (19) in the cylinder by bearing; Described cylinder front end is equipped with nozzle (1), it is characterized in that, the multistage moving vane that ladder is arranged that is is housed on the described integral rotor (19), between every adjacent two-stage moving vane, is provided with the dividing plate that is contained on the cylinder inner wall, and the inlet side of part dividing plate outer shroud is provided with except that wet sump with the outlet limit.
2. wet vapor cogeneration steam turbine according to claim 1 is characterized in that, described cylinder is made up of cylinder (16) under preceding upper cylinder half (3), back upper cylinder half (2), preceding cylinder (15) down, the back.
3. wet vapor cogeneration steam turbine according to claim 1 is characterized in that, seven grades of moving vanes (27 are housed on the described integral rotor (19), 28,29,30,31,32,33), its preceding Pyatyi moving vane (27,28,29,30,31) be the uniform section prismatic blade, the 6th, seven grade of moving vane (32,33) be the bent blade of variable cross section, the root of described six, seven grades of moving vanes (32,33) is bulbous root (37).
4. wet vapor cogeneration steam turbine according to claim 3, it is characterized in that, described the 6th, seven grade of moving vane (32,33) material is 1Cr12WMoV, the flow passage component of blade and blade profile place adopt inner quenching with Subsequent tempering HB269-311, and the outer surface nitrocarburizing is handled, and nitride layer depth is 0.1mm ~ 0.15mm, surface hardness is HV 〉=900, and fragility is no more than 2 grades.
5. wet vapor cogeneration steam turbine according to claim 1, it is characterized in that, described dividing plate has six grades of dividing plates (21,22,23,24,25,26), and the inlet side of its 5th, six grade of dividing plate (25,26) outer shroud and outlet limit are respectively equipped with except that wet sump (34,35).
6. wet vapor cogeneration steam turbine according to claim 5 is characterized in that, the described axial groove width of removing wet sump (34,35) is 0.1 mm ~ 0.15mm.
7. wet vapor cogeneration steam turbine according to claim 5, it is characterized in that, the material of described the 5th, six grade of dividing plate is 2Cr13, its dividing plate vane thickness is 4.5mm ~ 6mm, adopt quenching with Subsequent tempering HB229-277, outer flow passage surface nitrocarburizing is handled, and nitride layer depth is 0.1mm ~ 0.15mm, surface hardness is HV 〉=900, and fragility is no more than 2 grades.
8. according to the described wet vapor cogeneration of one of claim 1 ~ 7 steam turbine, it is characterized in that, be respectively equipped with forward and backward packing (14,39) between the front end and back end of described integral rotor (19) and the cylinder inner wall, the radial clearance between this forward and backward packing (14,39) and the cylinder is 0.3mm ~ 0.4mm.
9. according to the described wet vapor cogeneration of one of claim 1 ~ 7 steam turbine, it is characterized in that the throttle (steam) temperature of described steam turbine is 150 ℃ ~ 190 ℃, vapor pressure is 0.5MPa ~ 1.1MPa.
10. according to the described wet vapor cogeneration of one of claim 1 ~ 7 steam turbine, it is characterized in that, be located on the described cylinder control steam turbine air inflow carry plate valve (5), this aperture of carrying plate valve (5) is regulated by an electrohydaulic speed governor system (6), the rotating speed of described integral rotor (19) is 6500rpm ~ 11000rpm, and suitable power is 1500kW-4500kW.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202126330U CN202090960U (en) | 2011-06-22 | 2011-06-22 | Wet steam waste heat power generation steam turbine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202126330U CN202090960U (en) | 2011-06-22 | 2011-06-22 | Wet steam waste heat power generation steam turbine |
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| CN202090960U true CN202090960U (en) | 2011-12-28 |
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| CN2011202126330U Expired - Lifetime CN202090960U (en) | 2011-06-22 | 2011-06-22 | Wet steam waste heat power generation steam turbine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103133062A (en) * | 2013-02-26 | 2013-06-05 | 青岛捷能汽轮机集团股份有限公司 | Steam turbine and dehumidifying device in steam cylinder of steam turbine |
| CN103452606A (en) * | 2013-08-05 | 2013-12-18 | 国家电网公司 | Novel steam turbine |
| CN103806955A (en) * | 2014-02-25 | 2014-05-21 | 华电国际电力股份有限公司山东分公司 | Through-flow structure of steam turbine |
-
2011
- 2011-06-22 CN CN2011202126330U patent/CN202090960U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103133062A (en) * | 2013-02-26 | 2013-06-05 | 青岛捷能汽轮机集团股份有限公司 | Steam turbine and dehumidifying device in steam cylinder of steam turbine |
| CN103133062B (en) * | 2013-02-26 | 2015-08-05 | 青岛捷能汽轮机集团股份有限公司 | Dehumidifier in steam turbine and cylinder thereof |
| CN103452606A (en) * | 2013-08-05 | 2013-12-18 | 国家电网公司 | Novel steam turbine |
| CN103452606B (en) * | 2013-08-05 | 2015-05-13 | 国家电网公司 | Novel steam turbine |
| CN103806955A (en) * | 2014-02-25 | 2014-05-21 | 华电国际电力股份有限公司山东分公司 | Through-flow structure of steam turbine |
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| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
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Effective date of registration: 20160203 Address after: 411201 No. 28, Bai Shi Road, Xiangtan City, Hunan Province Patentee after: Weisheng Energy Industrial Technology (Changsha) Co., Ltd. Address before: 410013, 352, Jia Jia Lake Road, Changsha, Hunan, Yuelu District Patentee before: Hunan Li'neng Science & Technology Co., Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20111228 |
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