CN2570462Y - Large-scale heat supply and power-generating turbine separate high and low pressure cylinder arrangement - Google Patents
Large-scale heat supply and power-generating turbine separate high and low pressure cylinder arrangement Download PDFInfo
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- CN2570462Y CN2570462Y CN 02275369 CN02275369U CN2570462Y CN 2570462 Y CN2570462 Y CN 2570462Y CN 02275369 CN02275369 CN 02275369 CN 02275369 U CN02275369 U CN 02275369U CN 2570462 Y CN2570462 Y CN 2570462Y
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Abstract
The utility model relates to a large-scale heat supply and electricity generation steam turbine with the separating high and low pressure cylinder arrangement. The utility model comprises a high pressure cylinder, a low pressure cylinder, a shaft coupling between the high pressure cylinder and the lower pressure cylinder, and a steam condenser. Rotors are arranged in the high pressure cylinder and the low pressure cylinder; each rotor is provided with a movable blade; partition plates are installed at the inner wall of each cylinder; the partition plates are provided with static blades; two sets of partition plates and the static blades are arranged in the low pressure cylinder; one set is the electricity generation partition plates with long static blades, and the other set is the heat supply partition plate with short static blades; one partition plate at the top part of the static blades of the heat supply partition is provided with an auxiliary steam flow path. The utility model has the advantages that the utility model has stable running and safety, simultaneously, the utility model can realize the purpose of secondary heating the water in the heat supply network, so that the utility model has high heat energy utilization rate, and the utility model is suitable for the large-scale steam turbine of the more than 100MW high and low pressure cylinders separating arrangement, etc.
Description
(1), affiliated field
The utility model relates to a kind of heat supply steam turbine, specifically a kind of steam turbine with generating and heat supply dual functions, and be the large-size steam turbine that a kind of high low pressure divides cylinder structure.
(2), background technique
Steam turbine is a kind of important power generating equipment, usually steam turbine is in pure condensing condition generating, and at this moment the exhaust steam pressure of steam turbine is at 0.005-0.006Mpa, and vapour condenser is in vacuum state, the outlet temperature of cooling water is at 28-40 ℃, because of low can't the utilization of outlet temperature of cooling water.Can cause a large amount of heat loss (cold source energy) like this.If the cooling water of vapour condenser can be used as heating thermal source etc., just must make the outlet temperature of condenser cooling water reach 60-70 ℃.So just the degree of vacuum of vapour condenser must be lowered, just must improve the exhaust steam pressure of steam turbine, make the exhaust steam pressure of steam turbine reach 0.05-0.04Mpa (definitely), steam turbine is in the low vacuum state operation.When steam turbine is in the low vacuum state operation, will bring very big difficulty to steam turbine, mainly be after the exhaust steam pressure raising of steam turbine, making final stage and penultimate pressure fall (enthalpy drop) reduces greatly, thereby steam is greatly reduced through the flow velocity of stator blade, compare with former pure condensation design conditions, steam can not be by the flow velocity of former design conditions, flow direction enters final stage and time final stage moving blade, serious bump loss takes place, blade is long more serious more, causes the serious eddy current of root and the separation of flow of blade, and the friction windage loss increases, this level is done work hardly, even do negative work.For steam turbine can be moved under the low vacuum state in the heat supply phase, final stage, inferior final stage should be pulled down theoretically, but will change a rotor that final stage and time final stage moving blade are arranged in the non-heat supply phase.This method needs frequent exchanging rotor, and operation is trouble very, and the power plant that for this reason has is exchanging rotor not simply, but final stage, inferior last stage movable vane then are badly damaged.The patent No. is 98245541.0, and name is called in the utility model patent file of " the double-deck steam passage stator blade of condensing steam turbine low pressure stage mechanism ", discloses a kind of new method that addresses this problem.But this mechanism is suitable for smaller unit.Because eddy current that the blade of Large Steam Turbine Sets is long, low-vacuum-operating causes final stage moving blade and friction windage loss are more serious, and the condenser cooling water of the Large Steam Turbine Sets design water yield is very big, often greater than the flow of hot net water, so be less than the heat of vapour condenser design conditions at the heat of heating period hot net water absorption, therefore the steam flow that enters low pressure (LP) cylinder is less than design conditions, so more makes low pressure (LP) cylinder admission aisle spare at different levels reduce.So large-size steam turbine, the moving vane that when the heating period low-vacuum-operating, is adopted compare with stator blade to exceed bigger one section, eddy current and friction windage loss that the raised area is in operation and can causes serious steam.
(3), summary of the invention
The purpose of this utility model is to provide a kind of and operates steadily, the above high low pressure of 100MW that is applicable to safe and reliable, that the heat energy utilization rate is high divides large-scale heat supply, the electric turbine of cylinder structure.The purpose of this utility model is achieved in that it comprises coupling, vapour condenser between high-pressure cylinder, low pressure (LP) cylinder, the high and low pressure cylinder, the rotor that in high and low pressure cylinder, is provided with, moving vane is housed on rotor, be installed in the dividing plate of inboard wall of cylinder block, stator blade is housed on dividing plate, and the dividing plate in the low pressure (LP) cylinder, stator blade respectively have two covers, and a cover is the generating dividing plate of long stator blade, another set of heat supply dividing plate for short stator blade has auxiliary steam flow passage on the dividing plate at the stator blade top of heat supply dividing plate.The utility model also comprises the secondary heater that is connected with vapour condenser, on the connecting tube between high-pressure cylinder and the low pressure (LP) cylinder extraction steam pipe is set, and the other end of extraction steam pipe links to each other with the secondary heater.Advantage of the present utility model is: divides the large-size steam turbine of cylinder structure and designs at high low pressure, and when steam turbine is in simple generating state, the generating dividing plate of the long stator blade of installation code design in the low pressure (LP) cylinder.When steam turbine is in the heat supply state, change the heat supply dividing plate of short stator blade in the low pressure (LP) cylinder.At this moment owing to have auxiliary steam flow passage on the dividing plate, can in time discharge moving vane and exceed the long-pending vapour of eddy current that the stator blade part is produced, reduce the eddy current and the friction windage loss of steam, guarantee the Safety performance that operates steadily, improves steam turbine of large-size steam turbine.Owing to have auxiliary steam flow passage on the dividing plate, so that the height of stator blade can drop to is lower than the height of previous stage moving vane.The utility model is when the conversion of the state that generates electricity and heat, and high-pressure cylinder is motionless, only needs to change the dividing plate in the low pressure (LP) cylinder, and main structures such as the rotor in the low pressure (LP) cylinder all do not need to change, and are easy to operate.Because the blade of large-scale unit low pressure (LP) cylinder is longer, the flow of steam at average diameter place can not be represented the flowing state of whole blade.Therefore when specific design, must use three-dimensional flow theory and calculate, finally determine the area of main steam flow passage and auxiliary steam flow passage, and suitably reduce the exit angle of stator blade.To guarantee that the steam (vapor) outlet angle that stator blade master steam flow passage is complementary with grade Inlet cone angle of back moving vane.The steam flow that also should guarantee accessory channel simultaneously can exceed movable vane the long-pending vapour of eddy current that the stator blade part produced to be taken away, and reduces eddy current and friction windage loss.Device of the present utility model can be realized heating step by step, and vapour condenser is the hot net water primary heater, and drawing gas that high-pressure cylinder and low pressure (LP) cylinder connecting tube are located is used for hot net water second level heater.Improve the utilization ratio of heat energy, reduce thermal loss.Structure of the present utility model can be used for newly-designed unit, also can be used for old unit is transformed.
(4), description of drawings
Fig. 1 is that structure of the present utility model is formed schematic representation;
Fig. 2 is the layout plan of low pressure (LP) cylinder;
Fig. 3 is the structural representation of stator blade.
(5), specific embodiments
For example the utility model is done thinner detailed description below in conjunction with accompanying drawing:
In conjunction with Fig. 1, high low pressure divides the composition of large-scale heat supply, the electric turbine of cylinder structure to comprise coupling 12, vapour condenser 17 between high-pressure cylinder 11, low pressure (LP) cylinder 13, the high and low pressure cylinder.In conjunction with Fig. 2 and 3, rotor 6 is set in high and low pressure cylinder, moving vane 5 is installed on the rotor.Dividing plate 2 is installed on cylinder body 1 inwall.Stator blade 4 is installed on the dividing plate.Dividing plate in the low pressure (LP) cylinder, stator blade respectively have two covers.One cover is the generating dividing plate of long stator blade, and it is the dividing plate that the steam turbine of one group of standard design is in generating state.Another set of heat supply dividing plate for short stator blade has auxiliary steam flow passage 2 on the dividing plate at the stator blade top of heat supply dividing plate, stator blade group.
In conjunction with Fig. 1, be connected with secondary heater 19 behind the vapour condenser again, the high-pressure cylinder and the extraction steam pipe 10 that links to each other with the secondary heater that is provided with connecting tube 15 between the low pressure (LP) cylinder.Have quick closing valve 18 on the extraction steam pipe, have butterfly valve 16 on the connecting tube between high-pressure cylinder and the low pressure (LP) cylinder.The rotor of low pressure (LP) cylinder links to each other with generator 14.
Claims (2)
1, a kind of high low pressure divides large-scale heat supply, the electric turbine of cylinder structure, it comprises coupling, vapour condenser between high-pressure cylinder, low pressure (LP) cylinder, the high and low pressure cylinder, the rotor that in high and low pressure cylinder, is provided with, moving vane is housed on rotor, be installed in the dividing plate of inboard wall of cylinder block, stator blade is housed on dividing plate, it is characterized in that: the dividing plate in the low pressure (LP) cylinder, stator blade respectively have two covers, one cover is the generating dividing plate of long stator blade, another set of heat supply dividing plate for short stator blade has auxiliary steam flow passage on the dividing plate at the stator blade top of heat supply dividing plate.
2, high low pressure according to claim 1 divides large-scale heat supply, the electric turbine of cylinder structure, it is characterized in that: it also comprises the secondary heater that is connected with vapour condenser, on the connecting tube between high-pressure cylinder and the low pressure (LP) cylinder extraction steam pipe is set, the other end of extraction steam pipe links to each other with the secondary heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02275369 CN2570462Y (en) | 2002-09-19 | 2002-09-19 | Large-scale heat supply and power-generating turbine separate high and low pressure cylinder arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02275369 CN2570462Y (en) | 2002-09-19 | 2002-09-19 | Large-scale heat supply and power-generating turbine separate high and low pressure cylinder arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2570462Y true CN2570462Y (en) | 2003-09-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02275369 Expired - Fee Related CN2570462Y (en) | 2002-09-19 | 2002-09-19 | Large-scale heat supply and power-generating turbine separate high and low pressure cylinder arrangement |
Country Status (1)
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| CN (1) | CN2570462Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1880732B (en) * | 2005-06-14 | 2011-11-23 | 阿尔斯托姆科技有限公司 | Dampfturbine |
| CN102612601A (en) * | 2009-11-11 | 2012-07-25 | 西门子公司 | Intermediate floor for a radial turbine engine |
| CN104454028A (en) * | 2014-11-14 | 2015-03-25 | 东方电气集团东方汽轮机有限公司 | Method for improving running efficiency of steam turbine generator unit in heat supply season |
| CN109339873A (en) * | 2018-09-30 | 2019-02-15 | 东方电气集团东方汽轮机有限公司 | Last stage vane of steam turbine protective device for high back pressure heat supply |
-
2002
- 2002-09-19 CN CN 02275369 patent/CN2570462Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1880732B (en) * | 2005-06-14 | 2011-11-23 | 阿尔斯托姆科技有限公司 | Dampfturbine |
| CN102612601A (en) * | 2009-11-11 | 2012-07-25 | 西门子公司 | Intermediate floor for a radial turbine engine |
| CN102612601B (en) * | 2009-11-11 | 2014-12-24 | 西门子公司 | Intermediate floor for a radial turbine engine |
| US8967954B2 (en) | 2009-11-11 | 2015-03-03 | Siemens Aktiengesellschaft | Intermediate floor for a radial turbine engine |
| CN104454028A (en) * | 2014-11-14 | 2015-03-25 | 东方电气集团东方汽轮机有限公司 | Method for improving running efficiency of steam turbine generator unit in heat supply season |
| CN109339873A (en) * | 2018-09-30 | 2019-02-15 | 东方电气集团东方汽轮机有限公司 | Last stage vane of steam turbine protective device for high back pressure heat supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |