CN212389394U - Turbine heat regenerative system for increasing parameters of thermal power generating unit to 650 DEG C - Google Patents
Turbine heat regenerative system for increasing parameters of thermal power generating unit to 650 DEG C Download PDFInfo
- Publication number
- CN212389394U CN212389394U CN202021902648.5U CN202021902648U CN212389394U CN 212389394 U CN212389394 U CN 212389394U CN 202021902648 U CN202021902648 U CN 202021902648U CN 212389394 U CN212389394 U CN 212389394U
- Authority
- CN
- China
- Prior art keywords
- steam
- port
- pressure heater
- cooler
- pressure cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Control Of Turbines (AREA)
Abstract
The utility model discloses a turbine heat recovery system for increasing the thermal power generating unit parameters to 650 ℃, which comprises a high-pressure cylinder and a medium-pressure cylinder; the first-stage steam extraction port is connected with a first external steam cooler, and the first external steam cooler is connected with a first high-pressure heater; the high-pressure cylinder steam exhaust port is divided into two paths, one path is sent to a boiler reheater, and the other path is connected with a second high-pressure heater; three-stage steam extraction port and the third stageThe external steam cooler is connected, and the second external steam cooler is connected with the third high-pressure heater. The utility model provides a regenerative system can show and reduce one-level, tertiary extraction superheat degree, reduces irreversible loss (a)
Loss), improves the operating condition of the high-pressure heater, reduces the manufacturing cost of the heater, simultaneously uses redundant heat of first-level and third-level steam extraction for heating boiler feed water, plays a certain coal-saving effect, improves the cycle efficiency of the unit, and has certain popularization significance for developing the 650 ℃ supercritical power generation technology of the thermal power unit.
Description
[ technical field ] A method for producing a semiconductor device
The utility model belongs to the technical field of thermal power, a steam turbine heat recovery system that promotes thermal power unit parameter to 650 ℃ is related to.
[ background of the invention ]
Coal still dominates in fossil energy at present, and the energy structure of "more coal, less oil and gas deficiency" determines that coal still is the main primary energy for a long time in the future. The efficient and clean utilization of coal is the most effective means for reducing the emission of atmospheric pollutants and carbon dioxide from the source, wherein the efficient and clean coal-electricity technology is the main way for efficiently and cleanly utilizing coal, high-parameter and high-capacity units with high efficiency are developed, the power generation efficiency of a thermal power plant is improved, the coal consumption of the thermal power plant is reduced, and the efficient and clean coal-electricity technology is the main development direction of the efficient and clean coal-electricity technology.
Since the end of the last 90 s, some countries have started the development plans of advanced 700 ℃ ultra-supercritical power generation technologies, but 700 ℃ ultra-supercritical units need to use a large amount of expensive nickel-based alloy, so that the manufacturing cost of power plants is greatly increased, and the 700 ℃ ultra-supercritical power generation technology is expected to be incapable of realizing engineering application in a long period. In recent years, research and development of high-temperature materials have been advanced, some materials with relatively low cost and middle performance are developed in the research and development process of 700 ℃ ultra-supercritical power generation technology, a batch of available materials such as ferrite heat-resistant steel, austenite heat-resistant steel, iron-nickel-based alloy and the like exist at present, and the technology and economic performance are good, so that 650 ℃ ultra-supercritical power generation technology becomes a feasible, economic and reasonable development direction of the current technology.
After the temperature of main and reheat steam of a thermal power unit is raised to 650 ℃, the extraction superheat degree of each level of heater of the prior turbine regenerative system is obviously raised, so that the steam inlet temperature of the corresponding heater is overhigh, the operation condition is severe, the manufacturing cost is improved, meanwhile, the utilization level of the ultrahigh superheat degree is unreasonable, the heat exchange temperature difference of the heater is large, and the irreversible loss is caused (the temperature of the main and reheat steam of the thermal power unit is increased to 650: (
Loss) is increased, and the energy consumption of the unit is further reduced.
[ Utility model ] content
The utility model discloses an aim at provides a steam turbine heat recovery system who promotes thermal power unit parameter to 650 ℃ to the demand that large capacity, high parameter orientation development carried the effect and reform transform to thermal power unit, reduces steam turbine heat recovery system high pressure heater extraction of vapour superheat degree, reduces irreversible loss (: (reduce the superheat degree of) and
loss), reduce heater manufacturing cost, improve unit circulation efficiency simultaneously.
In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:
a turbine heat recovery system for improving thermal power generating unit parameters to 650 ℃, comprising:
the high-pressure cylinder is coaxially connected with the intermediate-pressure cylinder, a primary steam extraction port of the high-pressure cylinder is connected with the heat recovery unit through a heat regulation system, steam inlet of the high-pressure cylinder is boiler main steam, a steam exhaust port of the high-pressure cylinder is divided into two paths, the first path is connected with a boiler reheater, and the second path is connected with the heat recovery unit;
the steam inlet of the intermediate pressure cylinder is boiler reheating steam, and a three-stage steam extraction port of the intermediate pressure cylinder is connected with a reheating unit through a heat regulating system;
the system comprises a water supply pipeline, wherein an inlet of the water supply pipeline is connected with a deaerator, an outlet of the water supply pipeline is connected with a boiler economizer, a heat regulating system and a heat regenerative unit are both arranged on the water supply pipeline, and the heat regenerative system is arranged in the upstream direction of the heat regulating system.
The utility model discloses further improvement lies in:
the heat regulating system comprises a second branch port, a second valve group, a second confluence port, a first branch port, a first valve group and a first confluence port which are sequentially arranged along the water supply direction; the first valve group is connected with a first external steam cooler in parallel, and the second valve group is connected with a second external steam cooler in parallel.
The first diversion port divides the water supply into two paths, the first path is conveyed to the first valve group, the second path is conveyed to the water side inlet of the first external steam cooler through the third valve group, and the water side outlet of the first external steam cooler is connected with the first confluence port; the second branch port divides the feed water into two paths, the first path is conveyed to the second valve group, the second path is conveyed to the water side inlet of the second external steam cooler through the fourth valve group, and the water side outlet of the second external steam cooler is connected with the second confluence port;
a steam side inlet of the first external steam cooler is connected with a first-stage steam extraction port of the high-pressure cylinder, and a steam side outlet of the first external steam cooler is connected with the first high-pressure heater; the steam side inlet of the second external steam cooler is connected with the three-stage steam extraction port of the intermediate pressure cylinder, and the steam side outlet of the second external steam cooler is connected with the second high-pressure heater.
The heat recovery unit comprises a first high-pressure heater, a second high-pressure heater and a third high-pressure heater; the steam side inlet of the first high-pressure heater is connected with the steam side outlet of the first external steam cooler, the drain port of the first high-pressure heater is connected with the second high-pressure heater, the drain port of the second high-pressure heater is connected with the third high-pressure heater, and the drain port of the third high-pressure heater is connected with the deaerator; the steam side inlet of the second high-pressure heater is connected with the steam outlet of the high-pressure cylinder, and the steam side inlet of the third high-pressure heater is connected with the steam side outlet of the second external steam cooler.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses main, the reheat steam temperature of thermal power generating unit is carried to 650 ℃ after, and the heater at all levels of former steam turbine regenerative system is taken out the equal great rise of vapour superheat degree, and one-level and tertiary extraction are especially obvious, the utility model provides a regenerative system can show and reduce one-level, tertiary extraction superheat degree, reduces irreversible loss (reduce), (reheat steam temperature raises to 650 ℃
Loss), improve high pressure feed water heater operating condition, reduce heater manufacturing cost, simultaneously use the unnecessary heat of one-level, tertiary extraction steam to heat boiler feed water, play certain coal-saving effect, improved unit circulation efficiency.
[ description of the drawings ]
Fig. 1 is a schematic view of the overall structure of the present invention.
Wherein, 1-high pressure cylinder; 2-intermediate pressure cylinder; 3-a high-pressure cylinder steam outlet; 4-first-stage steam extraction port; 5-three-stage steam extraction ports; 6-a first external steam cooler; 7-a second external steam cooler; 8-a water supply pipeline; 9-a first high pressure heater; 10-a second high pressure heater; 11-a third high pressure heater; 12-a first manifold port; 13-a first valve group; 14-a first tap orifice; 15-a second manifold port; 16-a second valve group; 17-a second split port; 18-a third set of valves; 19-fourth valve set.
[ detailed description ] embodiments
In order to make the technical solution of the present invention better understood, the following figures in the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments, and do not limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
Various structural schematics according to the disclosed embodiments of the invention are shown in the drawings. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.
In the context of the present disclosure, when a layer/element is referred to as being "on" another layer/element, it can be directly on the other layer/element or intervening layers/elements may be present. In addition, if a layer/element is "on" another layer/element in one orientation, then that layer/element may be "under" the other layer/element when the orientation is reversed.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1, the steam turbine regenerative system for increasing the parameters of the thermal power generating unit to 650 ℃ of the utility model comprises a high pressure cylinder 1 and a medium pressure cylinder 2, wherein a primary steam extraction port 4 and a high pressure cylinder steam exhaust port 3 are arranged on the high pressure cylinder 1; the intermediate pressure cylinder 2 is provided with a three-stage steam extraction port 5.
The feed water in the boiler feed water pipeline 8 enters a boiler economizer after passing through a third high-pressure heater 11, a second high-pressure heater 10 and a first high-pressure heater 9 in sequence from a deaerator; the outlet water supply pipeline 8 of the first high-pressure heater 9 is sequentially provided with a second branch port 17, a second valve group 16, a second confluence port 15, a first branch port 14, a first valve group 13 and a first confluence port 12 along the water supply direction.
A third valve group 18 and a first external steam cooler 6 are arranged on the leading-out pipeline of the first shunt port 14; a fourth valve group 19 and a second external steam cooler 7 are arranged on the outlet pipeline of the second branch opening 17.
The primary steam extraction port 4 is connected with a first external steam cooler 6, and the first external steam cooler 6 is connected with a first high-pressure heater 9; the high-pressure cylinder steam exhaust port 3 is divided into two paths, the first path is sent to a boiler reheater, and the second path is connected with a second high-pressure heater 10; the third-stage steam extraction port 5 is connected with a second external steam cooler 7, and the second external steam cooler 7 is connected with a third high-pressure heater 11.
The drain port of the first high-pressure heater 9 is connected with the second high-pressure heater 10, the drain port of the second high-pressure heater 10 is connected with the third high-pressure heater 11, and the drain port of the third high-pressure heater 11 is connected with the deaerator.
The utility model discloses a working process:
a steam pipeline is led out from a first-stage steam extraction port 4 on a high-pressure cylinder 1 and is connected with a steam side inlet of a first external steam cooler 6, a steam side outlet of the first external steam cooler 6 is connected with a steam side inlet of a first high-pressure heater 9, a water pipeline is led out from a first diversion port 14 on a water supply pipeline and is connected with a water side inlet of the first external steam cooler 6 through a third valve group, a water side outlet of the first external steam cooler 6 is connected with a first confluence port 12 on a water supply pipeline 8, and the first external steam cooler 6 is arranged in parallel with a first valve group 13. When the unit is operated, if the superheat degree of the primary extraction steam is high, the third valve group 18 is opened, the first valve group 13 is closed, a certain amount of feed water is shunted to enter the first external steam cooler 6, and the primary extraction steam is cooled and then returns to the feed water pipeline 8 through the first confluence port 12.
A steam pipeline led out from a tertiary steam extraction port 5 on the intermediate pressure cylinder 2 is connected with a steam side inlet of a second external steam cooler 7, a steam side outlet of the second external steam cooler 7 is connected with a steam side inlet of a third high-pressure heater 11, a water pipeline led out from a second branch port 17 on a water supply pipeline 8 is connected with a water side inlet of the second external steam cooler 7 through a fourth valve group 19, a water side outlet of the second external steam cooler 7 is connected with a second confluence port 15 on the water supply pipeline 8, and the second external steam cooler 7 is connected with the second valve group 16 in parallel. When the unit is operated, if the superheat degree of the three-stage extracted steam is high, the fourth valve group 19 is opened, the second valve group 16 is closed, a certain amount of water supply is shunted to enter the second external steam cooler 7, and the three-stage extracted steam is cooled and then returns to the water supply pipeline 8 through the second confluence port 15. The feed water is sent to a boiler economizer after the temperature of the feed water is raised.
Other heaters, such as a high-pressure heater, a deaerator and a low-pressure heater, can also have the problem of high steam extraction temperature, and an external steam cooler can be arranged to reduce the steam superheat degree, or a method of increasing the number of regenerative steam extraction stages and adjusting the steam extraction port of the heater can be adopted.
The utility model provides a regenerative system can show and reduce one-level, tertiary extraction superheat degree, reduces irreversible loss (a)
Loss), improves the operating condition of the high-pressure heater, reduces the manufacturing cost of the heater, simultaneously uses redundant heat of first-level and third-level steam extraction for heating boiler feed water, plays a certain coal-saving effect, improves the cycle efficiency of the unit, and has certain popularization significance for developing the 650 ℃ supercritical power generation technology of the thermal power unit.
The above contents are only for explaining the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby, and any modification made on the basis of the technical solution according to the technical idea of the present invention all fall within the protection scope of the claims of the present invention.
Claims (4)
1. A steam turbine heat recovery system for improving parameters of a thermal power generating unit to 650 ℃ is characterized by comprising:
the high-pressure steam boiler comprises a high-pressure cylinder (1), wherein the high-pressure cylinder (1) is coaxially connected with a medium-pressure cylinder (2), a primary steam extraction port (4) of the high-pressure cylinder (1) is connected with a heat recovery unit through a heat regulation system, steam inlet of the high-pressure cylinder (1) is boiler main steam, a steam exhaust port of the high-pressure cylinder is divided into two paths, the first path is connected with a boiler reheater, and the second path is connected with the heat recovery unit;
the steam inlet of the intermediate pressure cylinder (2) is boiler reheating steam, and a three-stage steam extraction port (5) of the intermediate pressure cylinder (2) is connected with a heat regeneration unit through a heat regulation system;
the system comprises a water supply pipeline (8), wherein the inlet of the water supply pipeline (8) is connected with a deaerator, the outlet of the water supply pipeline is connected with a boiler economizer, a heat regulating system and a heat regenerative unit are both arranged on the water supply pipeline (8), and the heat regenerative system is arranged in the upstream direction of the heat regulating system.
2. The steam turbine regenerative system for improving the parameters of the thermal power generating unit to 650 ℃ according to claim 1, wherein the heat regulating system comprises a second branch port (17), a second valve set (16), a second confluence port (15), a first branch port (14), a first valve set (13) and a first confluence port (12) which are sequentially arranged along a water supply direction; the first valve group (13) is connected with a first external steam cooler (6) in parallel, and the second valve group (16) is connected with a second external steam cooler (7) in parallel.
3. The steam turbine regenerative system for increasing the parameters of the thermal power generating unit to 650 ℃ according to claim 2, characterized in that the first branch port (14) divides the feed water into two paths, the first path is transmitted to the first valve set (13), the second path is transmitted to the water side inlet of the first external steam cooler (6) through the third valve set (18), and the water side outlet of the first external steam cooler (6) is connected to the first junction port (12); the second branch port (17) divides the feed water into two paths, the first path is conveyed to the second valve group (16), the second path is conveyed to the water side inlet of the second external steam cooler (7) through the fourth valve group (19), and the water side outlet of the second external steam cooler (7) is connected with the second confluence port (15);
a steam side inlet of the first external steam cooler (6) is connected with a first-stage steam extraction port (4) of the high-pressure cylinder (1), and a steam side outlet is connected with a first high-pressure heater (9); the steam side inlet of the second external steam cooler (7) is connected with the three-stage steam extraction port (5) of the intermediate pressure cylinder (2), and the steam side outlet is connected with the second high-pressure heater (10).
4. The steam turbine regenerative system for increasing the parameters of a thermal power generating unit to 650 ℃ according to claim 3, characterized in that the regenerative unit comprises a first high-pressure heater (9), a second high-pressure heater (10) and a third high-pressure heater (11); a steam side inlet of the first high-pressure heater (9) is connected with a steam side outlet of the first external steam cooler (6), a drain port of the first high-pressure heater (9) is connected with the second high-pressure heater (10), a drain port of the second high-pressure heater (10) is connected with the third high-pressure heater (11), and a drain port of the third high-pressure heater (11) is connected with the deaerator; the steam side inlet of the second high-pressure heater (10) is connected with the steam outlet of the high-pressure cylinder (1), and the steam side inlet of the third high-pressure heater (11) is connected with the steam side outlet of the second external steam cooler (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021902648.5U CN212389394U (en) | 2020-09-03 | 2020-09-03 | Turbine heat regenerative system for increasing parameters of thermal power generating unit to 650 DEG C |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021902648.5U CN212389394U (en) | 2020-09-03 | 2020-09-03 | Turbine heat regenerative system for increasing parameters of thermal power generating unit to 650 DEG C |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212389394U true CN212389394U (en) | 2021-01-22 |
Family
ID=74254023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021902648.5U Active CN212389394U (en) | 2020-09-03 | 2020-09-03 | Turbine heat regenerative system for increasing parameters of thermal power generating unit to 650 DEG C |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212389394U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113137289A (en) * | 2021-05-28 | 2021-07-20 | 西安热工研究院有限公司 | Double-machine heat regeneration-based double reheating 650 ℃ ultra-supercritical coal-fired power generation system |
-
2020
- 2020-09-03 CN CN202021902648.5U patent/CN212389394U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113137289A (en) * | 2021-05-28 | 2021-07-20 | 西安热工研究院有限公司 | Double-machine heat regeneration-based double reheating 650 ℃ ultra-supercritical coal-fired power generation system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108757066B (en) | Thermal power generating unit regenerative heat storage system for load response and operation method | |
| CN107542506B (en) | Cascade utilization system for extraction condensing back of steam turbine and application thereof | |
| CN212389394U (en) | Turbine heat regenerative system for increasing parameters of thermal power generating unit to 650 DEG C | |
| CN110864343A (en) | Low-pressure cylinder zero-output heat supply system of circulating fluidized bed unit | |
| CN203499735U (en) | Combined cycle co-generation system | |
| CN111894690A (en) | Steam turbine heat regeneration system and method for improving parameters of thermal power generating unit to 650 DEG C | |
| CN112065520B (en) | Cold and hot re-cooperative steam supply system and method | |
| CN211116157U (en) | Low-pressure economizer and low-pressure cylinder zero-output heat supply coupling system | |
| CN110671161A (en) | High-parameter industrial steam supply system and method suitable for large coal-fired unit | |
| CN212408811U (en) | Heat supply network peak heating system | |
| CN109779705B (en) | Heating system for flexibly regulating steam inlet of steam turbine of coal-fired heat supply power plant | |
| CN111928316B (en) | Heating system and method for peak of heat supply network | |
| CN107883369B (en) | Boiler water supply cascade heating system suitable for wide-load denitration of unit and adjusting method | |
| CN214741514U (en) | Double-pumping industrial steam supply system based on heat storage tank | |
| CN214196424U (en) | Cylinder cutting operation system without cooling steam bypass | |
| CN213207819U (en) | Complementary energy recovery system for cogeneration cascade heat supply | |
| CN211952935U (en) | Low-pressure cylinder zero-output heat supply system of circulating fluidized bed unit | |
| CN212406830U (en) | Thermodynamic system for transforming back pressure unit into extraction condensing unit | |
| CN105561742B (en) | A kind of solar energy and geothermal energy united auxiliary carbon dioxide trapping system | |
| CN212202149U (en) | Gas-steam combined cycle thermodynamic system with steam extraction heat regeneration | |
| CN111706898B (en) | Method for improving heat supply capacity of unit after high-back-pressure heat supply transformation | |
| CN115031222A (en) | System and method for improving peak regulation capacity of thermal power generating unit by improved heat storage device | |
| CN210948817U (en) | Double-machine regenerative system participating in primary frequency modulation | |
| CN111911253A (en) | Deaerator combined cold recirculation system and method for improving steam supply capacity of boiler | |
| CN111927587A (en) | Condensate water combined circulation system and method for improving cold and steam supply capacity of boiler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |