CN205135734U - 660MW grade is middle reheat bleeding steam turbine unit once - Google Patents
660MW grade is middle reheat bleeding steam turbine unit once Download PDFInfo
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- CN205135734U CN205135734U CN201521003353.3U CN201521003353U CN205135734U CN 205135734 U CN205135734 U CN 205135734U CN 201521003353 U CN201521003353 U CN 201521003353U CN 205135734 U CN205135734 U CN 205135734U
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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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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
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Abstract
The utility model provides a 660MW grade is middle reheat bleeding steam turbine unit once, it relates to a bleeding steam turbine unit. The utility model discloses a to solve present coal -fired power unit equipment power supply coal consumption high, not only energy utilization is rateed lowly but also is had the problem that has increased the emission of pollutant. The utility model discloses a fore bearing case, high intermediate pressure cylinder, 2# bearing box, low pressure jar, 3# bearing box are arranged in the same direction as row in proper order, two main vapour governing valves of high pressure and two middling pressure reheats are adjusted joint valve and are located the high intermediate pressure cylinder left and right sides respectively, by communicating pipe channeling into the low pressure jar with well emission steam. The communicating pipe structure of liquid accuse butterfly valve is taken in the adoption, arranges the lower part position among the high intermediate pressure cylinder and establishes two steam extraction port, can measure enough greatly by regulated extraction steam, satisfies the demand of heating in winter. The utility model discloses an ultra supercritical, in the middle of once reheat, unipolar, two -cylinder two -exhaust, black soy sauce, grade eight regenerative extraction steam, condensing steam turbine. Utility model be applicable to coal -fired power unit purely when non - heating congeal the electricity generation, in heating phase cogeneration of heat and power.
Description
Technical field
The utility model relates to a kind of extraction turbine unit, is specifically related to a kind of 660MW grade resuperheat extraction turbine unit.
Background technique
Extraction turbine is that one extracts a part of steam supply user out by steam turbine intergrade, i.e. the steam turbine of also heat supply while generating.Need to be designed to Primary regulation steam-extracting type or Secondary Control steam-extracting type according to user.Day by day in short supply along with coal resources, China's existing fired power generating unit equipment net coal consumption rate is high, and not only energy utilization rate is low but also there is the problem adding the discharge amount of pollutant.
Model utility content
The purpose of this utility model is high in order to solve existing fired power generating unit equipment net coal consumption rate, and not only energy utilization rate is low but also there is the problem of the discharge amount of pollutant of adding, and then provides a kind of 660MW grade a resuperheat extraction turbine unit.
The technical solution of the utility model is: a kind of 660MW grade resuperheat extraction turbine unit, it comprises high intermediate pressure cylinder, low pressure (LP) cylinder, front bearing box, 2# bearing housing, 3# bearing housing, mesolow connecting tube, hydraulic butterfly valve and elastic tip packing assembly, front bearing box, high intermediate pressure cylinder, 2# bearing housing, low pressure (LP) cylinder and 3# bearing housing in-line arrangement successively from right to left; Low pressure (LP) cylinder is imported by arranging steam in high intermediate pressure cylinder by mesolow connecting tube, hydraulic butterfly valve is arranged on mesolow connecting tube, press steam supply extraction opening to be located at the bottom of high intermediate pressure cylinder in two low pressure heating extraction openings and one, elastic tip packing assembly is arranged on low pressure (LP) cylinder.
Front bearing box, 2# bearing housing and 3# bearing housing are floor bearing pedestal.
It also comprises in two high-pressure main steam regulating valves and two presses reheating to regulate union valve, presses reheating to regulate the equal symmetry of union valve to be arranged on the both sides of high intermediate pressure cylinder in two high-pressure main steam regulating valves and two.
Two high-pressure main steam regulating valves include high-pressure main steam regulating valve body and two high pressure regulating the qi flowing in the channels valve gaps and fastening piece, high-pressure main steam regulating valve body is arranged on the high intermediate pressure cylinder left and right sides, and two high pressure regulating the qi flowing in the channels valve gaps and fastening piece are arranged on high-pressure main steam regulating valve body respectively.
High pressure in high intermediate pressure cylinder is through-flow, and progression comprises a governing stage and ten reactionary style pressure levels, and a governing stage is connected from left to right successively with ten reactionary style pressure levels.
High intermediate pressure cylinder second have multiple extraction opening and steam-expelling port, wherein have two low pressure heating extraction openings, be positioned at the steam turbine center line left and right sides; Steam supply extraction opening is pressed, on steam turbine center line in one.
The utility model compared with prior art has following effect:
1, not yet there is low vapour parameter in China, the ultra supercritical that the thermal efficiency is high, single shaft, two-cylinder two-exhaust, a resuperheat extraction turbine at present.The utility model is applicable to medium-sized electrical network and bears base load, is more suitable for the Peak Load in large-scale power grid and base load.This unit is by optimizing through-flow reconstruct, adopt bearing housing to land elastic tip gland seal structure, band hydraulic butterfly valve communicating tube structure that structure, ripple joint connect, heating period meets the specified 600t/h low pressure heating amount of drawing gas, realize heating period cogeneration of heat and power, non-heating period pure condensate generating, has higher Economy.This unit durability is more than 30 years, and this type is applicable to the condition of the various coolant water temperature in the north and southern area, as usual completely sends out 660MW summer in south under water temperature condition.This unit annual mean service hours are not less than 7500 hours.For energy saving, the steam parameter improving conventional fired power generating unit is raised the efficiency, and the 660MW grade heat supply extra-supercritical unit that draws gas has stronger vitality and the market competitiveness
2, the utility model comprises the adjustment of high pressure flow progression, and enabling unit adapt to steam steam inlet condition is specified main steam initial steam pressure 25MPa, specified main steam throttle (steam) temperature 600 DEG C, specified reheated steam throttle (steam) temperature 600 DEG C;
3, the utility model adopts the main vapour of high pressure to regulate union valve, enables unit at specified main steam initial steam pressure 25MPa, can safely and steadily run under specified main steam throttle (steam) temperature 600 DEG C of operating modes;
4, the utility model is provided with hydraulic butterfly valve in connecting tube, is provided with heating extraction opening in high pressure bottom, adopts black soy sauce steam ports form, and rate of air sucked in required is enough large, can be good at meeting the requirement that power plant's winter heating draws gas;
5, the utility model adopts elastic tip gland seal structure, can avoid, because back pressure is high, economy causes greatly unit low pressure sound parts to misalign, causing unit impact and rub problem;
6, the utility model adopts floor model bearing housing, existing type bearing seated on turbine casing case can be avoided because back pressure is high, economy causes greatly unit low pressure sound parts to misalign, cause unit impact and rub problem;
7, the utility model adopts low vapour parameter, and main steam pressure is 25MPa, and main steam temperature is 600 DEG C, and reheat steam temperature is 600 DEG C.Cylinder structure of the present utility model is advanced, and complete machine is arranged unique, and generatine set heat efficiency is high.Medium-sized electrical network bears base load, is more suitable for the Peak Load in large-scale power grid and base load.This unit durability is more than 30 years, and this type is applicable to the condition of the various coolant water temperature in the north and southern area, as usual completely sends out 660MW summer in south under water temperature condition.This unit annual mean service hours are not less than 7500 hours.Due to this unit meet various specific condition under run, be more and more subject to the favor of the investor of each department power plant construction project.
Accompanying drawing explanation
Fig. 1 is vertical section structure schematic diagram of the present utility model, and Fig. 2 is plan view of the present utility model; Fig. 3 is plan view of the present utility model; Fig. 4 is that the main vapour of high pressure regulates union valve schematic diagram, and Fig. 5 is high pressure flow schematic diagram, and Fig. 6 is mesolow connecting tube schematic diagram, and Fig. 7 is low pressure floor bearing pedestal schematic diagram, and Fig. 8 is heating extraction opening position view; Fig. 9 is the close-up schematic view of high intermediate pressure cylinder 1 and front bearing box 3.
Embodiment
Embodiment one: composition graphs 1 to Fig. 9 illustrates present embodiment, a kind of 660MW grade resuperheat extraction turbine unit of present embodiment, it comprises high intermediate pressure cylinder 1, low pressure (LP) cylinder 2, front bearing box 3,2# bearing housing 4,3# bearing housing 5, mesolow connecting tube 6, hydraulic butterfly valve 7 and elastic tip packing assembly 8
Front bearing box 3, high intermediate pressure cylinder 1,2# bearing housing 4, low pressure (LP) cylinder 2 and 3# bearing housing 5 in-line arrangement successively from right to left; Low pressure (LP) cylinder 2 (being seen to motor side by speed regulator end) is imported by arranging steam in high intermediate pressure cylinder 1 by mesolow connecting tube 6, hydraulic butterfly valve 7 is arranged on mesolow connecting tube 6, press steam supply extraction opening 11-2 to be located at the bottom of high intermediate pressure cylinder 1 in two low pressure heating extraction opening 11-1 and, elastic tip packing assembly 8 is arranged on low pressure (LP) cylinder 2.
Arrange lower portion in high intermediate pressure cylinder 1 and install black soy sauce steam ports 11-1, can adjust the amount of drawing gas enough large, heating period meets the specified 600t/h low pressure heating amount of drawing gas, and realizes heating period cogeneration of heat and power, non-heating period pure condensate generating.
Embodiment two: composition graphs 1 illustrates present embodiment, the front bearing box 3 of present embodiment, 2# bearing housing 4 and 3# bearing housing 5 are floor bearing pedestal.Setting like this, can avoid existing type bearing seated on turbine casing case because back pressure is high, economy causes greatly unit low pressure sound parts to misalign, cause unit impact and rub problem.Other composition is identical with embodiment one with annexation.
Embodiment three: composition graphs 1 to Fig. 2 illustrates present embodiment, present embodiment also comprises in two high-pressure main steam regulating valves 9 and two pressing in reheating adjustment union valve 10, two high-pressure main steam regulating valves 9 and two presses reheating to regulate the equal symmetry of union valve 10 to be arranged on the left and right sides of high intermediate pressure cylinder 1.Setting like this, can realize the high pressure combined launch of unit.Other composition is identical with embodiment two with annexation.
Embodiment four: composition graphs 4 illustrates present embodiment, two high-pressure main steam regulating valves 9 of present embodiment include high-pressure main steam regulating valve body 9-1 and two high pressure regulating the qi flowing in the channels valve gap and fastening piece 9-2, high-pressure main steam regulating valve body 9-1 is arranged on the lower end of high intermediate pressure cylinder module 1, and two high pressure regulating the qi flowing in the channels valve gaps and fastening piece 9-2 are arranged on high-pressure main steam regulating valve body 9-1 both sides respectively.Setting like this, can make valve interface position enough firm, and to meet existing unit specified main steam initial steam pressure 25MPa, specified main steam throttle (steam) temperature 600 DEG C of parameters are run.Other composition is identical with embodiment two or three with annexation.
Embodiment five: composition graphs 5 illustrates present embodiment, the through-flow progression of high pressure in the high intermediate pressure cylinder 1 of present embodiment comprises a governing stage 1-1 and ten reactionary style pressure level 1-2, and a governing stage 1-1 is connected from left to right successively with ten reactionary style pressure level 1-2.Setting like this is specified main steam initial steam pressure 25MPa to adapt to steam inlet condition, the 600 DEG C of requirements of specified main steam throttle (steam) temperature, and optimize high pressure enthalpy drop at different levels, the high pressure flow progression of redesign is made up of a governing stage and 10 reactionary style pressure levels.Other composition is identical with embodiment four with annexation.
Embodiment six: composition graphs 8 illustrates present embodiment, present embodiment is heating extraction opening position view, and figure mesolow heating extraction opening 11-1, be positioned at high intermediate pressure cylinder bottom symmetrical relative to steam turbine center line, nominal diameter is 610mm.Setting like this, adopts black soy sauce steam ports form, and rate of air sucked in required is enough large, can meet heat supply in winter demand.Other composition is identical with embodiment five with annexation.
The high-pressure main steam regulating valve of present embodiment, be specified main steam initial steam pressure 25MPa to adapt to steam inlet condition, the 600 DEG C of requirements of specified main steam throttle (steam) temperature, design high-pressure main steam regulating valve body, high pressure main stop valve lid and fastening piece and high-pressure regulation valve gap and fastening piece.
The mesolow connecting tube of present embodiment, with hydraulic butterfly valve, can realize the heat supply of low pressure adjustable and draw gas.
The middle pressure steam supply of present embodiment draws gas (non-adjustment is drawn gas) parameter: extraction pressure 2.1Mpa, and extraction temperature is more than or equal to 250 DEG C, and design heating load corresponding to the specified amount of drawing gas is 80t/h, and the enthalpy of design heating load parameter is 3407.8KJ/Kg; Design heating load corresponding to the maximum amount of drawing gas is 100t/h, and the enthalpy of design heating load parameter is 3408.3KJ/Kg; Middle pressure heat supply exhaust point position: middle pressure three sections draws gas (in Fig. 2 and 8 11-2); Middle pressure heat supply extraction pressure is 2.1Mpa; Middle pressure heat supply extraction temperature is 473.7 DEG C.
The low pressure heat supply of present embodiment is drawn gas (adjustable steam extraction) parameter: extraction pressure 1.0Mpa, and extraction temperature is more than or equal to 230 DEG C, and design heating load corresponding to the specified amount of drawing gas is 600t/h, and the enthalpy of design heating load parameter is 3181.4KJ/Kg; Design heating load corresponding to the maximum amount of drawing gas is 800t/h, and the enthalpy of design heating load parameter is 3167.4KJ/Kg; Low pressure heat supply exhaust point position (in Fig. 2 and 8 11-1): middle pressure vapour; Low pressure heat supply extraction pressure is 1.0Mpa; Low pressure heat supply extraction temperature is 360.8 DEG C.
The floor model bearing housing structure of present embodiment, by bearing housing and lp outer casing separate design, makes bearing housing and lp outer casing be supported in respectively on basis, realizes landing object.Existing type bearing seated on turbine casing case can be avoided because back pressure is high, economy causes greatly unit low pressure sound parts to misalign, cause unit impact and rub problem.
The elastic tip gland seal structure of present embodiment.This end packing is installed between lp outer casing and bearing housing, leaks for avoiding that steam in cylinder leaks outside, in cylinder outer air.Adopt expansion joint structure and tight and bearing housing, the problem that low voltage terminal packing of can avoiding in the past being rigidly connected is out of shape with lp outer casing, avoid, because back pressure is high, economy causes greatly unit low pressure sound parts to misalign, causing unit impact and rub problem;
Working principle:
Ultra supercritical 660MW grade resuperheat extraction turbine unit is applicable to the condition of the various coolant water temperature in the north and southern area, as usual completely sends out 660MW summer in south under water temperature condition.Due to this unit meet various specific condition under run, be more and more subject to the favor of the investor of each department power plant construction project.The utility model specified main steam initial steam pressure 25MPa, the steam of specified main steam throttle (steam) temperature 600 DEG C regulates union valve through the main vapour of high pressure being arranged in unit both sides, the steam guiding tube flowed through again between high-pressure main steam regulating valve and high pressure cylinder enters high pressure flow (being made up of 1 governing stage and 10 reactionary style pressure levels), steam is arranged by height and is entered boiler reheater and carry out after increasing temperature and pressure reaches specified reheated steam throttle (steam) temperature 600 DEG C to steam after high pressure flow completes acting, reheated steam regulates union valve and steam guiding tube thereof to enter middle pressure through-flow (being made up of 7 reactionary style pressure levels) through the main vapour of middle pressure reheating being arranged in unit both sides, steam middle pressure is through-flow complete acting after through entering low pressure (LP) cylinder module by mesolow connecting tube, steam forward and reverse through-flow (each 5 grades of reactionary style pressure levels) do work backward under drain into vapour condenser, the requirement that steam-expelling port flow draws gas to meet heating in heating period is regulated by hydraulic butterfly valve.Finally realize unit pure condensate generating when non-heating, in heating period cogeneration of heat and power.
Claims (5)
1. 660MW grade resuperheat extraction turbine unit, it is characterized in that: it comprises high intermediate pressure cylinder (1), low pressure (LP) cylinder (2), front bearing box (3), 2# bearing housing (4), 3# bearing housing (5), mesolow connecting tube (6), hydraulic butterfly valve (7) and elastic tip packing assembly (8)
Front bearing box (3), high intermediate pressure cylinder (1), 2# bearing housing (4), low pressure (LP) cylinder (2) and 3# bearing housing (5) in-line arrangement successively from right to left; By mesolow connecting tube (6), middle row's steam of high intermediate pressure cylinder (1) is imported low pressure (LP) cylinder (2), hydraulic butterfly valve (7) is arranged on mesolow connecting tube (6), press steam supply extraction opening (11-2) to be located at the bottom of high intermediate pressure cylinder (1) in two low pressure heating extraction openings (11-1) and one, elastic tip packing assembly (8) is arranged on low pressure (LP) cylinder (2).
2. a kind of 660MW grade according to claim 1 resuperheat extraction turbine unit, is characterized in that: front bearing box (3), 2# bearing housing (4) and 3# bearing housing (5) are floor bearing pedestal.
3. a kind of 660MW grade according to claim 2 resuperheat extraction turbine unit, it is characterized in that: it also comprises in two high-pressure main steam regulating valves (9) and two presses reheating to regulate union valve (10), in two high-pressure main steam regulating valves (9) and two, press reheating to regulate the equal symmetry of union valve (10) to be arranged on the left and right sides of high intermediate pressure cylinder (1).
4. a kind of 660MW grade according to claim 3 resuperheat extraction turbine unit, it is characterized in that: two high-pressure main steam regulating valves (9) include high-pressure main steam regulating valve body (9-1) and two high pressure regulating the qi flowing in the channels valve gaps and fastening piece (9-2), high-pressure main steam regulating valve body (9-1) is arranged on the left and right sides of high intermediate pressure cylinder (1), and two high pressure regulating the qi flowing in the channels valve gaps and fastening piece (9-2) are arranged on high-pressure main steam regulating valve body (9-1) respectively.
5. a kind of 660MW grade according to claim 4 resuperheat extraction turbine unit, it is characterized in that: the through-flow progression of high pressure in high intermediate pressure cylinder (1) comprises a governing stage (1-1) and ten reactionary style pressure levels (1-2), a governing stage (1-1) is connected from left to right successively with ten reactionary style pressure levels (1-2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201521003353.3U CN205135734U (en) | 2015-12-04 | 2015-12-04 | 660MW grade is middle reheat bleeding steam turbine unit once |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201521003353.3U CN205135734U (en) | 2015-12-04 | 2015-12-04 | 660MW grade is middle reheat bleeding steam turbine unit once |
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| CN205135734U true CN205135734U (en) | 2016-04-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105370330A (en) * | 2015-12-04 | 2016-03-02 | 哈尔滨汽轮机厂有限责任公司 | 660MW-grade primary intermediate reheat extraction steam turbine unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105370330A (en) * | 2015-12-04 | 2016-03-02 | 哈尔滨汽轮机厂有限责任公司 | 660MW-grade primary intermediate reheat extraction steam turbine unit |
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