CN111140554A - Device integrating steam injection, air exhaust and steam seal cooling functions - Google Patents
Device integrating steam injection, air exhaust and steam seal cooling functions Download PDFInfo
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- CN111140554A CN111140554A CN202010054126.2A CN202010054126A CN111140554A CN 111140554 A CN111140554 A CN 111140554A CN 202010054126 A CN202010054126 A CN 202010054126A CN 111140554 A CN111140554 A CN 111140554A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/54—Installations characterised by use of jet pumps, e.g. combinations of two or more jet pumps of different type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/12—Cooling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
- F04F5/16—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids
- F04F5/20—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids for evacuating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
- F04F5/16—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids
- F04F5/20—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids for evacuating
- F04F5/22—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids for evacuating of multi-stage type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/08—Auxiliary systems, arrangements, or devices for collecting and removing condensate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/10—Auxiliary systems, arrangements, or devices for extracting, cooling, and removing non-condensable gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D19/00—Starting of machines or engines; Regulating, controlling, or safety means in connection therewith
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
The invention discloses a device integrating steam injection, air extraction and steam seal cooling functions, which comprises a working steam generating pipe, a steam-gas mixture suction pipe, a starting ejector, a primary ejector, a secondary ejector, a steam seal ejector, an air extraction primary shell-and-tube heat exchanger, a secondary shell-and-tube heat exchanger and a steam seal primary shell-and-tube heat exchanger, wherein the working steam generating pipe is connected with the working steam generating pipe; the primary air-extracting shell-and-tube heat exchanger is connected with the secondary shell-and-tube heat exchanger through an inlet water chamber and an outlet water chamber, and the secondary shell-and-tube heat exchanger is connected with the vapor seal primary shell-and-tube heat exchanger through a transition water chamber; the air-extracting primary shell-and-tube heat exchanger, the diode shell-and-tube heat exchanger and the stage steam-sealing primary shell-and-tube heat exchanger are coaxially arranged, and the diode shell-and-tube heat exchanger is positioned between the air-extracting primary shell-and-tube heat exchanger and the steam-sealing primary shell-and-tube heat exchanger. The device integrating the functions of steam injection, air extraction and steam seal cooling reduces the occupation of the plant area, reduces the arrangement of steam pipelines and the arrangement of heat exchangers, and is more convenient to operate.
Description
Technical Field
The invention relates to the technical field of turbine air extraction machinery, in particular to a device integrating steam injection and extraction and steam seal cooling functions.
Background
The air extractor is used for continuously extracting air which leaks into a space on the side of the condenser through an unclean part of a turbine condenser and a pipeline which are under negative pressure so as to maintain the vacuum of the condenser and good heat transfer. The air extractor comprises a single-stage starting air extractor and a two-stage main air extractor. The start-up air extractor is used to quickly create a vacuum in the condenser sufficient to start the turbine before the turbine is started, and the main air extractor is operated in conjunction with the operation of the condenser during normal operation of the turbine. The starting air extractor is a single-stage steam-jet air extractor without a heat exchanger, and directly discharges all steam-air mixtures into the atmosphere during working. The main air extractor is composed of two single-stage steam-jet air extractors and two corresponding heat exchangers which are connected in series. The air extractor is an independent device which is arranged in the factory building independently.
The steam seal cooler is used for leading the air leakage pipeline of the front and rear steam seals of the steam turbine to have slight negative pressure, leading the air leakage to continuously enter the steam seal cooler through the air leakage pipeline and condensing the air leakage into water for the reuse of the boiler. The operation of the gland cooler is generally as follows, the gland seal steam from the front and back of the steam turbine enters the heat exchanger of the gland cooler from the leakage air inlet of the gland cooler through the leakage steam pipeline, and is condensed into water and discharged from the drain outlet. Since there is some non-condensable air in the blow-by gas, the gas needs to be extracted in order to make the blow-by gas continuously pass through the blow-by gas pipeline and enter the steam seal cooler, and the air and residual steam need to be exhausted to the atmosphere through the steam ejector. The steam seal cooler is also an independent device and is arranged in a plant independently.
It can be seen that the air extractor and the steam seal cooler are two separate devices, and the steam pipeline and the heat exchanger need to be configured separately when in use, so that too much factory space is occupied, and the operation of a plurality of separate devices is inconvenient.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a device integrating steam injection and extraction and steam seal cooling functions, which reduces the occupation of a factory building area, reduces the arrangement of steam pipelines and the arrangement of heat exchangers and ensures that the operation is more convenient.
The purpose of the invention is realized by adopting the following technical scheme:
a device integrating steam injection and extraction and steam seal cooling functions comprises a working steam generating pipe, a steam-gas mixture suction pipe, a starting ejector, a primary ejector, a secondary ejector, a steam seal ejector and a shell-and-tube heat exchanger; the starting injector comprises a starting nozzle, a starting mixing chamber and a starting diffuser pipe; the primary ejector comprises a primary nozzle, a primary mixing chamber and a primary diffuser pipe; the secondary ejector comprises a secondary nozzle, a secondary mixing chamber and a secondary diffuser pipe; the steam seal ejector comprises a steam seal nozzle, a steam seal mixing chamber and a steam seal diffuser pipe; the shell-and-tube heat exchanger comprises an air extraction primary shell-and-tube heat exchanger, a two-stage shell-and-tube heat exchanger and a steam seal primary shell-and-tube heat exchanger; the secondary shell-and-tube heat exchanger is connected with the vapor seal primary shell-and-tube heat exchanger through a transition water chamber; the air-extracting primary shell-and-tube heat exchanger, the diode shell-and-tube heat exchanger and the steam-sealing primary shell-and-tube heat exchanger are coaxially arranged, the secondary shell-and-tube heat exchanger is positioned between the air-extracting primary shell-and-tube heat exchanger and the steam-sealing primary shell-and-tube heat exchanger, and return water chambers are arranged at the end parts of the air-extracting primary shell-and-tube heat exchanger and the steam-sealing primary shell-and-;
the starting nozzle, the primary nozzle, the secondary nozzle and the steam seal nozzle are communicated with the working steam generating pipe through steam pipes arranged in parallel; the primary mixing chamber is communicated with the steam-gas mixture suction pipe; the gradual expansion section of the starting diffuser pipe is connected with a vent pipe; the divergent section of the primary diffuser pipe is communicated with the air-extracting primary shell-and-tube heat exchanger, the secondary mixing chamber is communicated with the air-extracting primary shell-and-tube heat exchanger, and the divergent section of the secondary diffuser pipe is communicated with the diode shell-and-tube heat exchanger; the steam seal mixing chamber is communicated with the steam seal primary shell-and-tube heat exchanger, and the divergent section of the steam seal diffuser pipe is communicated with the secondary shell-and-tube heat exchanger;
an air-extracting primary drain port is arranged on the air-extracting primary shell-and-tube heat exchanger; the secondary shell-and-tube heat exchanger is provided with a secondary exhaust port and a secondary drain port; and a steam seal air leakage port and a steam seal primary drain port are arranged on the steam seal primary shell-and-tube heat exchanger.
Further, a water chamber water outlet is formed in the bottom of the backflow water chamber, and a water chamber air outlet is formed in the top of the backflow water chamber.
Further, the number of the primary injectors and the secondary injectors is two.
Furthermore, the bottoms of the air-extracting primary shell-and-tube heat exchanger, the secondary shell-and-tube heat exchanger and the steam-sealing primary shell-and-tube heat exchanger are all provided with a bracket.
Further, the water inlet of the inlet and outlet water chamber is located at the bottom, and the water outlet of the inlet water chamber is located at the top.
Furthermore, a silencer is connected between the gradually expanding section of the starting diffuser pipe and the emptying pipe.
Furthermore, a safety valve is also arranged on the air extraction primary shell-and-tube heat exchanger.
Compared with the prior art, the invention has the beneficial effects that: the first-stage ejector, the second-stage ejector, the air-extracting first-stage shell-and-tube heat exchanger and the two-stage shell-and-tube heat exchanger actually form a two-stage steam-injecting air extractor, so that the steam-injecting and air-extracting functions are realized; the steam seal ejector, the steam seal primary shell-and-tube heat exchanger and the two-stage shell-and-tube heat exchanger actually form a steam seal cooler, so that the steam seal cooling function is realized; the invention integrates the functions of steam ejection, air exhaust and steam seal cooling, and shares a diode shell-and-tube heat exchanger and a working steam generating tube when integrating the functions, and because the air exhaust primary shell-and-tube heat exchanger, the diode shell-and-tube heat exchanger and the steam seal primary shell-and-tube heat exchanger are coaxially arranged, the end parts of the air exhaust primary shell-and-tube heat exchanger and the steam seal primary shell-and-tube heat exchanger are respectively provided with a circulating water chamber, so that three shell-and-tube heat exchangers can share a path of circulating water.
Drawings
FIG. 1 is a schematic diagram of the structure of an injector;
FIG. 2 is a perspective view of the integrated jet extraction and gland seal cooling apparatus of the present invention;
FIG. 3 is a front view of the apparatus of the present invention incorporating steam injection and extraction and gland seal cooling functions;
FIG. 4 is a left side view of the apparatus of the present invention incorporating steam injection and extraction and gland cooling functions;
FIG. 5 is a top view of the apparatus of the present invention incorporating steam injection and extraction and steam seal cooling functions;
FIG. 6 is a schematic view showing the flow direction of cooling water in the tube bundle type tube heater.
In the figure: 11. a nozzle; 12. a mixing chamber; 13. a diffuser pipe; 131. a contraction section; 132. a gradual expansion section; 21. a working steam generating tube; 22. a vapor-gas mixture suction pipe; 23. starting the mixing chamber; 24. a primary mixing chamber; 25. a secondary mixing chamber; 26. a vapor seal mixing chamber; 31. a primary shell-and-tube heat exchanger for air extraction; 311. a first-stage drain port for air extraction; 32. a two-stage shell and tube heat exchanger; 321. a secondary exhaust port; 322. a secondary drain port; 33. a steam seal primary shell-and-tube heat exchanger; 331. a vapor seal vent; 332. steam sealing a primary drain port; 41. an inlet and outlet water chamber; 411. a water inlet; 412. a water outlet; 42. a transition water chamber; 43. a return flow water chamber; 431. a water discharge outlet; 432. an air release port; 5. a support; 6. an emptying pipe; 7. a muffler; 8. a safety valve.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
It should be noted that the injector belongs to the prior art, and the injector is composed of three parts, namely a nozzle 11, a mixing chamber 12 and a diffuser pipe 13, and the structure of the injector is shown in fig. 1. The working principle is as follows: working steam enters the nozzle 11, is subjected to pressure reduction and expansion, forms high-speed airflow at the outlet section 1-1, enters the mixing chamber 12, injects a low-speed steam-air mixture from the condenser, enters the inlet section 2-2 of the diffuser pipe 13, passes through the contraction section 131, the throat part and the gradual expansion section 132 of the diffuser pipe 13, is subjected to adiabatic compression to a certain pressure, and then enters the heat exchanger to condense the steam. In the present invention, the starting ejector, the primary ejector, the secondary ejector, and the gland ejector are the same as the above-described principle.
As shown in fig. 2-5, the apparatus for integrating steam extraction and steam seal cooling provided by the embodiment of the present invention is shown, and comprises a working steam generating pipe 21, a steam-gas mixture suction pipe 22, a starting ejector, a primary ejector, a secondary ejector, a steam seal ejector and a shell-and-tube heat exchanger. The starting injector comprises a starting nozzle, a starting mixing chamber 23 and a starting diffuser pipe (only the starting mixing chamber 23 is shown in fig. 2); the primary injector includes a primary nozzle, a primary mixing chamber 24, and a primary diffuser (only the primary mixing chamber 24 is shown in FIG. 2); the secondary injector comprises a secondary nozzle, a secondary mixing chamber 25 and a secondary diffuser pipe (only the secondary mixing chamber 25 is shown in fig. 2); the gland injector includes a gland nozzle, a gland mixing chamber 26, and a gland diffuser (only the gland mixing chamber 26 is shown in fig. 2).
The shell-and-tube heat exchanger comprises an air extraction primary shell-and-tube heat exchanger 31, a secondary shell-and-tube heat exchanger 32 and a steam seal primary shell-and-tube heat exchanger 33; the bottoms of the air extraction primary shell-and-tube heat exchanger 31, the secondary shell-and-tube heat exchanger 32 and the steam seal primary shell-and-tube heat exchanger 33 are all provided with a bracket 5. Specifically, the extraction primary shell-and-tube heat exchanger 31, the secondary shell-and-tube heat exchanger 32 and the vapor seal primary shell-and-tube heat exchanger 33 all adopt a floating head tube plate type structure, and in the invention, three shell-and-tube heat exchangers all adopt a two-tube pass structure. The primary air-extracting shell-and-tube heat exchanger 31 is connected with the secondary shell-and-tube heat exchanger 32 through an inlet and outlet water chamber 41, a water inlet 411 of the inlet and outlet water chamber 41 is positioned at the bottom, and a water outlet 412 of the inlet and outlet water chamber 41 is positioned at the top. The secondary shell-and-tube heat exchanger 32 is connected with the vapor seal primary shell-and-tube heat exchanger 33 through a transition water chamber 42; the primary air-extracting shell-and-tube heat exchanger 31, the secondary shell-and-tube heat exchanger 32 and the primary air-sealing shell-and-tube heat exchanger 33 are coaxially arranged, the secondary shell-and-tube heat exchanger 32 is positioned between the primary air-extracting shell-and-tube heat exchanger 31 and the primary air-sealing shell-and-tube heat exchanger 33, and return water chambers 43 are arranged at the end parts of the primary air-extracting shell-and-tube heat exchanger 31 and the primary air-sealing. Specifically, a water chamber drain opening 431 is provided at the bottom of the return water chamber 43, and a water chamber drain opening 432 is provided at the top of the return water chamber 43. As shown in fig. 6, the flow direction of the cooling water in the tube bundle type tube heater is schematically shown (the arrows in the figure represent the flow direction of the cooling water).
The starting nozzle, the primary nozzle, the secondary nozzle and the steam seal nozzle are communicated with the working steam generating pipe 21 through steam pipes arranged in parallel; the primary mixing chamber 24 is communicated with the steam-gas mixture suction pipe 22; the gradual expansion section of the starting diffuser pipe is connected with a vent pipe 6; the gradually expanding section of the primary diffuser pipe is communicated with the air-extracting primary shell-and-tube heat exchanger 31, the secondary mixing chamber 25 is communicated with the air-extracting primary shell-and-tube heat exchanger 31, and the gradually expanding section of the secondary diffuser pipe is communicated with the secondary shell-and-tube heat exchanger 32; the steam seal mixing chamber 26 is communicated with a steam seal primary shell-and-tube heat exchanger 33, and the gradually expanding section of a steam seal diffuser pipe is communicated with a secondary shell-and-tube heat exchanger 32.
The primary air-extracting shell-and-tube heat exchanger 31 is provided with a primary air-extracting drain port 311; the secondary shell-and-tube heat exchanger 32 is provided with a secondary exhaust port 321 and a secondary drain port 322; the steam seal primary shell-and-tube heat exchanger 33 is provided with a steam seal air leakage port 331 and a steam seal primary drain port 332.
The working process of the device integrating the functions of steam injection, air extraction and steam seal cooling is as follows, before the steam turbine is started, the working steam generating pipe 21 and the starting ejector are firstly used for enabling the condenser to quickly establish vacuum enough for starting the steam turbine, and therefore the purpose of starting the steam turbine is achieved. When the turbine is started, the starting injector is deactivated (in practice by the valve cutting off the connection of the operating steam pipe to the starting nozzle). And then, the steam-gas mixture in the steam-gas mixture suction pipe 22 is condensed through a primary ejector and a primary pumping shell-and-tube heat exchanger 31, and the steam-gas mixture which is not condensed in the previous step is further condensed through a secondary ejector and a secondary shell-and-tube heat exchanger 32, so that the function of two-stage steam injection and pumping is realized. The specific process is as follows: the steam-gas mixture enters the air-extracting one-level shell-and-tube heat exchanger 31 to be condensed after passing through the one-level mixing chamber 24 and the one-level diffuser pipe, condensed water flows out through the air-extracting one-level drain hole 311, the uncondensed steam-gas mixture continues to enter the second-level shell-and-tube heat exchanger 32 to be condensed after passing through the second-level mixing chamber 25 and the second-level diffuser pipe, the condensed water flows out through the second-level drain hole 322, and a small amount of uncondensed steam-gas mixture is discharged into the.
In order to enable the air leakage pipeline of the front and rear steam seals of the steam turbine to have slight negative pressure, the air leakage needs to enter the steam seal primary shell-and-tube heat exchanger 33 through a steam seal air leakage port 331, the air leakage is firstly directly condensed in the steam seal primary tube bundle type tube heat exchanger, the condensed water flows out through a steam seal primary drain port 332, the uncondensed air leakage is condensed again through a steam seal ejector and a secondary shell-and-tube heat exchanger 32, at this time, the condensed water flows out through a secondary drain port 322, and a small amount of uncondensed steam-gas mixture is discharged into the atmosphere through a secondary exhaust port.
The primary ejector, the secondary ejector, the air extraction primary shell-and-tube heat exchanger 31 and the secondary shell-and-tube heat exchanger 32 actually form a two-stage steam jet air extractor, so that the steam jet air extraction function is realized; the steam seal ejector, the steam seal primary shell-and-tube heat exchanger 33 and the secondary shell-and-tube heat exchanger 32 actually form a steam seal cooler, so that the steam seal cooling function is realized; the invention integrates the functions of steam ejection, air extraction and steam seal cooling, and shares the diode shell-and-tube heat exchanger 32 and the working steam generating tube 21 when integrating the functions, and because the air extraction primary shell-and-tube heat exchanger 31, the diode shell-and-tube heat exchanger 32 and the steam seal primary shell-and-tube heat exchanger 33 are coaxially arranged, the water return chambers 43 are arranged at the end parts of the air extraction primary shell-and-tube heat exchanger 31 and the steam seal primary shell-and-tube heat exchanger 33, so that the three shell-and-tube heat exchangers can share one path of circulating water.
In a preferred embodiment, the number of primary injectors and secondary injectors is two. Therefore, the purpose of one use and one spare use can be realized, and the device integrating the functions of steam injection and extraction and steam seal cooling has higher reliability in use.
Preferably, a silencer 7 is also connected between the divergent section of the starting diffuser and the flare 6. Because the starting ejector works for about half an hour when the steam turbine is started, and the noise is very loud, the noise can be effectively reduced by arranging the silencer, so that the invention is more environment-friendly.
Preferably, the primary air-extracting shell-and-tube heat exchanger 31 is also provided with a safety valve 8. Because the secondary shell-and-tube heat exchanger 32 can be communicated with the atmosphere through the secondary exhaust port 321, the pressure can be relieved through the secondary exhaust port 321, and the problem of overlarge pressure cannot be caused. The primary shell-and-tube heat exchanger 31 for air extraction is a relatively closed space, so that the problem that pressure cannot be released due to overlarge pressure possibly exists, and safety accidents are caused, so that the pressure can be released when the pressure is overlarge by arranging the safety valve 8, and the safety of the device integrating the functions of steam injection and air extraction and steam seal cooling is ensured.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (7)
1. The utility model provides an integrated device that penetrates vapour and extract air and gland sealing cooling function which characterized in that includes: the device comprises a working steam generating pipe, a steam-gas mixture suction pipe, a starting ejector, a primary ejector, a secondary ejector, a steam seal ejector and a shell-and-tube heat exchanger; the starting injector comprises a starting nozzle, a starting mixing chamber and a starting diffuser pipe; the primary ejector comprises a primary nozzle, a primary mixing chamber and a primary diffuser pipe; the secondary ejector comprises a secondary nozzle, a secondary mixing chamber and a secondary diffuser pipe; the steam seal ejector comprises a steam seal nozzle, a steam seal mixing chamber and a steam seal diffuser pipe; the shell-and-tube heat exchanger comprises an air extraction primary shell-and-tube heat exchanger, a two-stage shell-and-tube heat exchanger and a steam seal primary shell-and-tube heat exchanger; the secondary shell-and-tube heat exchanger is connected with the vapor seal primary shell-and-tube heat exchanger through a transition water chamber; the air-extracting primary shell-and-tube heat exchanger, the diode shell-and-tube heat exchanger and the steam-sealing primary shell-and-tube heat exchanger are coaxially arranged, the secondary shell-and-tube heat exchanger is positioned between the air-extracting primary shell-and-tube heat exchanger and the steam-sealing primary shell-and-tube heat exchanger, and return water chambers are arranged at the end parts of the air-extracting primary shell-and-tube heat exchanger and the steam-sealing primary shell-and-;
the starting nozzle, the primary nozzle, the secondary nozzle and the steam seal nozzle are communicated with the working steam generating pipe through steam pipes arranged in parallel; the primary mixing chamber is communicated with the steam-gas mixture suction pipe; the gradual expansion section of the starting diffuser pipe is connected with a vent pipe; the divergent section of the primary diffuser pipe is communicated with the air-extracting primary shell-and-tube heat exchanger, the secondary mixing chamber is communicated with the air-extracting primary shell-and-tube heat exchanger, and the divergent section of the secondary diffuser pipe is communicated with the diode shell-and-tube heat exchanger; the steam seal mixing chamber is communicated with the steam seal primary shell-and-tube heat exchanger, and the divergent section of the steam seal diffuser pipe is communicated with the secondary shell-and-tube heat exchanger;
an air-extracting primary drain port is arranged on the air-extracting primary shell-and-tube heat exchanger; the secondary shell-and-tube heat exchanger is provided with a secondary exhaust port and a secondary drain port; and a steam seal air leakage port and a steam seal primary drain port are arranged on the steam seal primary shell-and-tube heat exchanger.
2. The device integrating steam injection and extraction and steam seal cooling functions as claimed in claim 1, wherein the bottom of the backflow water chamber is provided with a water chamber water outlet, and the top of the backflow water chamber is provided with a water chamber air outlet.
3. The apparatus for integrating steam extraction and gland cooling functions of claim 1 wherein the number of said primary and secondary ejectors is two.
4. The device integrating steam-jet air exhaust and steam seal cooling functions as claimed in claim 1, wherein the bottoms of the air exhaust primary shell-and-tube heat exchanger, the secondary shell-and-tube heat exchanger and the steam seal primary shell-and-tube heat exchanger are provided with brackets.
5. The apparatus of claim 1, wherein the inlet of the inlet/outlet water chamber is located at the bottom and the outlet of the inlet/outlet water chamber is located at the top.
6. The apparatus for integrating steam injection, extraction and gland cooling functions as claimed in claim 1, wherein a silencer is further connected between the divergent section of the starting diffuser pipe and the flare.
7. The apparatus for integrating steam injection, extraction and gland-sealing cooling functions as claimed in claim 1, wherein the extraction primary shell-and-tube heat exchanger is further provided with a safety valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010054126.2A CN111140554A (en) | 2020-01-17 | 2020-01-17 | Device integrating steam injection, air exhaust and steam seal cooling functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010054126.2A CN111140554A (en) | 2020-01-17 | 2020-01-17 | Device integrating steam injection, air exhaust and steam seal cooling functions |
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| Publication Number | Publication Date |
|---|---|
| CN111140554A true CN111140554A (en) | 2020-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010054126.2A Pending CN111140554A (en) | 2020-01-17 | 2020-01-17 | Device integrating steam injection, air exhaust and steam seal cooling functions |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117469212A (en) * | 2023-12-26 | 2024-01-30 | 青州凯能热动设备有限公司 | Multistage steam jet air extractor system for steam turbine |
-
2020
- 2020-01-17 CN CN202010054126.2A patent/CN111140554A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117469212A (en) * | 2023-12-26 | 2024-01-30 | 青州凯能热动设备有限公司 | Multistage steam jet air extractor system for steam turbine |
| CN117469212B (en) * | 2023-12-26 | 2024-03-26 | 青州凯能热动设备有限公司 | Multistage steam jet air extractor system for steam turbine |
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