CN218816563U - System for steam turbine heat supply under degree of depth peak regulation - Google Patents
System for steam turbine heat supply under degree of depth peak regulation Download PDFInfo
- Publication number
- CN218816563U CN218816563U CN202222956523.6U CN202222956523U CN218816563U CN 218816563 U CN218816563 U CN 218816563U CN 202222956523 U CN202222956523 U CN 202222956523U CN 218816563 U CN218816563 U CN 218816563U
- Authority
- CN
- China
- Prior art keywords
- steam
- heater
- pressure
- pressure heater
- heat supply
- 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
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The utility model discloses a system of steam turbine heat supply under degree of depth peak shaving belongs to thermal power plant's steam turbine heat supply technical field, to the hot steam heat supply (steam bypass heat supply promptly) in the unit flexibility transformation technique, there is hot steam and heat supply network heater thermal parameter between the two to mismatch, pass through the decompression with high-grade energy hot steam, the temperature reduction becomes low-grade energy steam supply heat supply network heater, its irreversible entropy increases the process, lead to the acting capacity loss, make unit economic nature greatly reduced's problem. The system comprises a boiler, a steam turbine, a heat supply network heater, an auxiliary high-pressure heater, a pressure reduction desuperheater, a low-pressure heater, a steam (water) pipeline, an adjusting valve and the like, and under the deep peak regulation working condition, the auxiliary high-pressure heater is preferably selected to be put into operation, so that the steam energy is utilized in a gradient manner, the feed water temperature of the boiler is improved, the denitration effect of the boiler is improved, the thermoelectric decoupling of a unit is realized, and the system has higher economical efficiency and practical value.
Description
Technical Field
The utility model belongs to the technical field of thermal power plant's steam turbine heat supply, the system of steam turbine heat supply under specific degree of depth peak shaving.
Background
With the advance of the double-carbon target, new energy such as wind power, photoelectricity and the like is successively and massively connected to the grid for generating electricity, and in order to furthest consume clean energy, the power grid requires a coal-electric set to improve the peak regulation capacity. For the extraction condensing heat supply unit, the heating period runs in a mode of 'heating and power fixing', the minimum output of the heating period is generally about 60-70%, the heat load and the electric load are related, so that the electric load cannot be effectively reduced for ensuring heat supply, the peak regulation capacity is only about 10%, the power balance of the power grid at the valley is extremely difficult, and the electric-heat coupling contradiction is very prominent. In order to relieve the contradiction between power grid peak regulation and unit heat supply, different schemes are adopted to technically transform the extraction condensing heat supply unit, and the common technical scheme comprises the following steps: the system comprises a low-pressure cylinder, a low-pressure rotor, a high-back-pressure circulating water, a heat accumulating electric boiler, an absorption heat pump, a steam turbine and the like.
The prior heat-steam heat supply technology comprises the following steps: set up the pressure reduction desuperheater between original unit main steam pipe and reheat cold section steam conduit, the desuperheating water comes from the high-pressure feed water pipeline of boiler feed water pump export, send main steam to reheat cold section steam conduit and get back to the boiler reheater after the pressure reduction desuperheats, thereby guarantees the reheater flow and ensures that the reheater is not overtemperature. A set of pressure reduction attemperator is arranged on a reheating section steam pipeline of an original unit, the attemperator water is from a condensed water system, and partial reheating section steam is sent to a heat supply network heating steam main pipe after being subjected to pressure reduction and temperature reduction so as to provide a steam source for a heat supply network heater. The high-pressure and low-pressure two-stage pressure reduction desuperheater is arranged in the middle layer of a steam turbine plant.
The heat is supplied by steam again, the steam does not enter the high-pressure cylinder and the medium-pressure cylinder to do work, the unit output is reduced, the heat supply capacity is increased, the balance of the axial thrust of the high-pressure cylinder and the medium-pressure cylinder is realized by adjusting the flow of the high-pressure bypass and the low-pressure bypass, the requirement of the maximum heat load can be met, and the deep peak shaving of the power grid can also be participated. The unit operation flexibility has been promoted after the transformation, can realize the degree of depth peak regulation of certain period of time every day, and the load level reaches paid compensation range, increases the income of power plant.
The heating net heater is of a surface type. The heat supply backwater returns to the inlet of the heat supply network heater, the high-temperature high-pressure steam in the steam turbine heats the heat supply backwater in the heat supply network heater, the heated hot water supplies heat to the outside, and a heat supply steam source (usually medium pressure cylinder exhaust steam) of the original heat supply network heater is matched with the thermal parameters of the heat supply network water. In order to meet the requirement of deep peak regulation, flexible modification is carried out, a heat supply network heater steam source is added, reheater hot section steam is selected as the heat supply steam source, the steam pressure and temperature state parameters are not matched with the thermal parameters required by the heat supply network heater, the pressure reduction and temperature reduction of the hot reheat steam are required, and then the heat supply network heater is introduced. Decompressing and cooling the steam, and keeping energy constant from the first thermodynamic law; from the second law of thermodynamics, it is an irreversible entropy-increasing process, resulting in a loss of work-doing ability. The heat supply mode of reducing pressure and temperature by using the hot re-steam is adopted, so that the heat supply requirement is met, the thermoelectric decoupling is realized, and the high-grade energy steam is changed into the low-grade energy steam through reducing pressure and temperature, so that the economic efficiency of the unit is greatly reduced. When the peak is deeply regulated, the feed water temperature of the boiler is low, and the denitration effect of the boiler is influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the above-mentioned not enough that exists among the prior art, and provide a system that steam turbine heat supply under reasonable in design, operation are reliable, are favorable to degree of depth peak shaver.
The utility model provides a technical scheme that above-mentioned problem adopted is: the utility model provides a system of steam turbine heat supply under degree of depth peak regulation which characterized in that: the system comprises a boiler, a steam turbine, a pressure reducing desuperheater, an auxiliary high-pressure heater, a heat supply network heater, a low-pressure heater, a third high-pressure heater, a second high-pressure heater and a first high-pressure heater, wherein one path of a hot re-steam outlet of the boiler is connected with the steam turbine through a first hot re-steam pipe, the other path of the reheated steam outlet of the boiler is connected with the pressure reducing desuperheater and the auxiliary high-pressure heater through a second hot re-steam pipe respectively, the auxiliary high-pressure heater is connected with the heat supply network heater through a steam exhaust pipe of the auxiliary high-pressure heater, the pressure reducing desuperheater is connected with the heat supply network heater through a steam exhaust pipe of the pressure reducing desuperheater, the heat supply network heater is connected with a steam exhaust pipe of a medium pressure cylinder of the steam turbine, the heat supply network heater is connected with the low-pressure heater through a steam drain pipe of the heat supply network heater and a heat supply water return pipe respectively, the water side of the third high-pressure heater, the water side of the second high-pressure heater and the water side of the first high-pressure heater are sequentially connected through a water supply pipe of the high-pressure heater, the steam side of the third high-pressure heater, the steam side of the second high-pressure heater and the steam side of the first high-pressure heater are respectively connected with a steam inlet pipe of the third high-pressure heater, a steam inlet pipe of the second high-pressure heater and a steam inlet pipe of the first high-pressure heater (steam is extracted from a steam turbine), a drain port of the first high-pressure heater is connected with the second high-pressure heater through a drain pipe of the first high-pressure heater, a drain port of the second high-pressure heater is connected with the third high-pressure heater through a drain pipe of the second high-pressure heater, a drain port of the third high-pressure heater is connected with a drain pipe of the third high-pressure heater, and a water supply outlet of the first high-pressure heater is connected with the auxiliary high-pressure heater through an inlet water supply pipe of the auxiliary high-pressure heater, the other path of the water supply outlet of the first high-pressure heater is connected with the boiler through a boiler inlet water supply pipe, and the water supply outlet of the auxiliary high-pressure heater is connected with the boiler through an auxiliary high-pressure heater outlet water supply pipe.
Furthermore, a first valve is installed at a hot re-steam inlet of the pressure reduction desuperheater, a second valve is installed at a hot re-steam inlet of the auxiliary high-pressure heater, a third valve is installed on a water supply pipe at the inlet of the auxiliary high-pressure heater, a fourth valve is installed on a water supply pipe at the inlet of the boiler, and a fifth valve is installed on a steam exhaust pipe of a steam turbine intermediate pressure cylinder.
Compared with the prior art, the utility model, have following advantage and effect: the utility model discloses low in manufacturing cost, dependable performance, simple to use have feasibility, maneuverability and novelty. Implement the utility model discloses afterwards, abandoned the heat supply mode that hot reheat passes through the decompression desuperheater, under the degree of depth peak regulation operating mode, steam energy has obtained the step utilization, has improved boiler feed water temperature, has improved boiler denitration effect, has realized the thermoelectric decoupling zero of unit, has higher economic nature and practical value.
Drawings
Fig. 1 is a schematic diagram of the system structure of the present invention.
In the figure: the system comprises a boiler 1, a steam turbine 2, a pressure reducing desuperheater 3, an auxiliary high-pressure heater 4, a heat supply network heater 5, a heat consumer 6, a low-pressure heater 7, a third high-pressure heater 8, a second high-pressure heater 9, a first high-pressure heater 10, a high-pressure heater water supply pipe 11, an auxiliary high-pressure heater inlet water supply pipe 12, an auxiliary high-pressure heater outlet water supply pipe 13, a boiler inlet water supply pipe 14, a heat re-steam pipe 15, a heat re-steam pipe 16, a pressure reducing desuperheater steam exhaust pipe 17, an auxiliary high-pressure heater steam exhaust pipe 18, a heat supply water outlet pipe 19, a heat supply water return pipe 20, a heat supply network heater steam trap 21, a third high-pressure heater steam inlet pipe 22, a second high-pressure heater steam inlet pipe 23, a first high-pressure heater steam inlet pipe 24, a first high-pressure heater steam trap 25, a second high-pressure heater steam trap 26, a third high-pressure heater steam trap 27, a steam turbine steam trap 28, a valve first 29, a valve second valve 30, a valve third valve 31, a valve fourth 32 and a valve fifth 33.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.
Examples
Referring to fig. 1, in the present embodiment, a system for supplying heat to a steam turbine under deep peak shaving comprises a boiler 1, a steam turbine 2, a pressure-reducing desuperheater 3, an auxiliary high-pressure heater 4, a heating network heater 5, a low-pressure heater 7, a third high-pressure heater 8, a second high-pressure heater 9 and a first high-pressure heater 10, wherein one path of a hot reheat steam outlet of the boiler 1 is connected with the steam turbine 2 through a hot reheat pipe 15, the other path of the reheated steam outlet of the boiler 1 is connected with the pressure-reducing desuperheater 3 and the auxiliary high-pressure heater 4 through a hot reheat pipe 16, the auxiliary high-pressure heater 4 is connected with the heating network heater 5 through an auxiliary high-pressure heater exhaust pipe 18, the pressure-reducing desuperheater 3 is connected with the heating network heater 5 through a pressure-reducing desuperheater exhaust pipe 17, the heating network heater 5 is connected with a steam network heater 5, the steam network heater 5 is connected with a steam exhaust pipe 28 of a steam turbine medium-pressure cylinder, the heating network heater 5 is connected with the low-pressure heater 7 through a steam network heater drain pipe 21, the heating network heater 5 is connected with a heat network heater 6 through a heat supply water return pipe 19 and a heat supply pipe 20, the third high-pressure steam heater 9 and a high-pressure steam inlet pipe 10 are connected with the high-pressure steam drain pipe 10, the first high-pressure steam heater 9 and the high-steam heater 9 and the second high-pressure steam heater 9, the drain port of the third high-pressure heater 8 is connected with a drain pipe 27 of the third high-pressure heater, one path of the water supply outlet of the first high-pressure heater 10 is connected with the auxiliary high-pressure heater 4 through an inlet water supply pipe 12 of the auxiliary high-pressure heater, the other path of the water supply outlet of the first high-pressure heater 10 is connected with the boiler 1 through an inlet water supply pipe 14 of the boiler, and the water supply outlet of the auxiliary high-pressure heater 4 is connected with the boiler 1 through an outlet water supply pipe 13 of the auxiliary high-pressure heater; a first valve 29 is installed at a hot re-steam inlet of the pressure reduction desuperheater 3, a second valve 30 is installed at a hot re-steam inlet of the auxiliary high-pressure heater 4, a third valve 31 is installed on an inlet water supply pipe 12 of the auxiliary high-pressure heater, a fourth valve 32 is installed on an inlet water supply pipe 14 of the boiler, and a fifth valve 33 is installed on an exhaust pipe 28 of a steam turbine intermediate pressure cylinder.
The working method of the system comprises the following steps:
1. during deep peak regulation, according to the requirements of electric load and heat load, fully closing or partially closing the first valve 29, fully opening or partially opening the second valve 30, fully opening or partially opening the fifth valve 33, and optimally selecting hot re-steam through the auxiliary high-pressure heater 4 to realize the gradient utilization of hot re-steam energy;
2. during deep peak regulation, according to the requirements of electric load and heat load, fully opening or partially opening the third valve 31, fully closing or partially closing the fourth valve 32, and preferably feeding water to the boiler 1 through the auxiliary high-pressure heater 4, so that the feeding water temperature of the boiler 1 is increased, and the denitration effect of the boiler 1 is improved;
3. when the peak regulation is normal, the heat supply steam source preferably selects the steam discharge of a medium pressure cylinder of the steam turbine 2, the valve I29 and the valve II 30 are fully closed, and the valve V33 is fully opened or partially opened;
4. when the peak is regulated normally, the third valve 31 is opened fully, the fourth valve 32 is closed fully, and the water fed by the boiler 1 preferably passes through the auxiliary high-pressure heater 4;
5. when the unit operates, other equipment and systems operate according to a conventional method.
The utility model discloses based on steam turbine heat is steam heating technology again, rational design and realized the heat steam heating system again that accords with the required admission thermodynamic parameter of heat supply network heater, the application the utility model discloses afterwards, abandoned the heat supply mode that heat steam passes through the decompression desuperheater again, under the degree of depth peak regulation operating mode, steam energy has obtained the step and has utilized, has improved boiler feed water temperature, has improved boiler denitration effect, has realized the thermoelectric decoupling zero of unit, has higher economic nature and practical value.
Those not described in detail in this specification are well within the skill of the art.
Although the present invention has been described with reference to the above embodiments, it should not be construed as being limited to the scope of the present invention, and any modifications and alterations made by those skilled in the art without departing from the spirit and scope of the present invention should fall within the scope of the present invention.
Claims (4)
1. The utility model provides a system of steam turbine heat supply under degree of depth peak regulation which characterized in that: comprises a boiler (1), a steam turbine (2), a pressure reducing desuperheater (3), an auxiliary high-pressure heater (4), a heat supply network heater (5), a low-pressure heater (7), a third high-pressure heater (8), a second high-pressure heater (9) and a first high-pressure heater (10), wherein a hot re-steam outlet of the boiler (1) passes through a first heat re-steam pipe (15) to be connected with the steam turbine (2), the other hot re-steam outlet of the boiler (1) passes through a second heat re-steam pipe (16) to be respectively connected with the pressure reducing desuperheater (3) and the auxiliary high-pressure heater (4), the auxiliary high-pressure heater (4) is connected with the heat supply network heater (5) through a steam exhaust pipe (18) of the auxiliary high-pressure heater, the pressure reducing desuperheater (3) is connected with the heat supply network heater (5) through a steam exhaust pipe (17) of the pressure reducing desuperheater, the heat supply network heater (5) is connected with a steam exhaust pipe (28) of a steam turbine medium-pressure cylinder, the heat supply network heater (5) is connected with the low-pressure heater (7) through a steam supply network heater (6) and a water supply pipe (10), and a water outlet pipe (11) of the heat supply network heater (10), the steam side of the third high-pressure heater (8), the second high-pressure heater (9) and the first high-pressure heater (10) is respectively connected with a steam inlet pipe (22) of the third high-pressure heater, a steam inlet pipe (23) of the second high-pressure heater and a steam inlet pipe (24) of the first high-pressure heater (10), a drain port of the first high-pressure heater (10) is connected with the second high-pressure heater (9) through a drain pipe (25) of the first high-pressure heater, a drain port of the second high-pressure heater (9) is connected with the third high-pressure heater (8) through a drain pipe (26) of the second high-pressure heater, a drain port of the third high-pressure heater (8) is connected with a drain pipe (27) of the third high-pressure heater, a water supply outlet of the first high-pressure heater (10) is connected with the auxiliary high-pressure heater (4) through an inlet pipe (12) of the auxiliary high-pressure heater, a water supply outlet of the first high-pressure heater (10) is connected with the boiler (1) through an inlet pipe (14), and a water supply outlet of the auxiliary high-pressure heater (4) is connected with the boiler (1) through an outlet pipe (13).
2. The system for turbine heating with deep peaking of claim 1, wherein: and a first valve (29) is arranged at a hot re-steam inlet of the pressure-reducing desuperheater (3), and a second valve (30) is arranged at a hot re-steam inlet of the auxiliary high-pressure heater (4).
3. The system for turbine heating with deep peaking of claim 1, wherein: and a third valve (31) is arranged on the inlet water feeding pipe (12) of the auxiliary high-pressure heater, and a fourth valve (32) is arranged on the inlet water feeding pipe (14) of the boiler.
4. The system for turbine heating with deep peaking of claim 1, wherein: and a fifth valve (33) is arranged on the steam exhaust pipe (28) of the intermediate pressure cylinder of the steam turbine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222956523.6U CN218816563U (en) | 2022-11-07 | 2022-11-07 | System for steam turbine heat supply under degree of depth peak regulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222956523.6U CN218816563U (en) | 2022-11-07 | 2022-11-07 | System for steam turbine heat supply under degree of depth peak regulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218816563U true CN218816563U (en) | 2023-04-07 |
Family
ID=87264603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222956523.6U Active CN218816563U (en) | 2022-11-07 | 2022-11-07 | System for steam turbine heat supply under degree of depth peak regulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218816563U (en) |
-
2022
- 2022-11-07 CN CN202222956523.6U patent/CN218816563U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108035777B (en) | Low-pressure cylinder combined zero-output heat supply system and method in thermal power generating unit | |
| CN108757066B (en) | Thermal power generating unit regenerative heat storage system for load response and operation method | |
| CN108049923B (en) | Three-exhaust 200MW unit medium-low pressure cylinder combined zero-output heat supply system and method | |
| CN107859538B (en) | Combined heat and power generation system for condensing back heat supply and operation method thereof | |
| CN113669117A (en) | Steam turbine bypass coupling low-pressure cylinder zero-output heat supply system and method for improving operation flexibility of heat supply unit | |
| CN106838865A (en) | The extraction for heat supply electric power station system and method for work of a kind of complete thermoelectricity decoupling | |
| CN112611010B (en) | Adjusting method of flexible adjusting system for power generation load of multi-heat-source cogeneration unit | |
| CN112065520B (en) | Cold and hot re-cooperative steam supply system and method | |
| CN211174242U (en) | Heating season cogeneration unit on-line electricity load adjusting system | |
| CN113187569A (en) | Double-extraction and condensation dual-purpose system based on steam ejector and operation method | |
| CN210179723U (en) | Combined cycle device based on heat supply and electric power peak regulation coupling | |
| CN109779705B (en) | Heating system for flexibly regulating steam inlet of steam turbine of coal-fired heat supply power plant | |
| CN210088955U (en) | Combined cycle device for steam extraction integration and heat storage peak regulation coupling | |
| CN112833378A (en) | Reheating system capable of improving heat supply capacity | |
| CN218816563U (en) | System for steam turbine heat supply under degree of depth peak regulation | |
| CN110700909A (en) | Heating season cogeneration unit on-line electricity load adjusting system and adjusting method | |
| CN217950479U (en) | Power plant cylinder cutting system capable of reducing steam consumption of cooling steam | |
| CN114234264B (en) | Thermoelectric cooperative system coupled with steam ejector and operation method | |
| CN111706898B (en) | Method for improving heat supply capacity of unit after high-back-pressure heat supply transformation | |
| CN113280390B (en) | Deep peak regulation heat supply grade improving system and method based on heat pump boosting reheating | |
| CN210178429U (en) | Heating system for steam extraction integration of gas-steam combined cycle unit | |
| CN114233421A (en) | Thermoelectric cooperative system integrated with steam ejector and operation method | |
| CN212406830U (en) | Thermodynamic system for transforming back pressure unit into extraction condensing unit | |
| CN115898573A (en) | System for supplying heat to steam turbine under deep peak shaving and working method thereof | |
| CN110056402B (en) | Steam complementary energy utilization coupling steam extraction heat supply system and adjusting method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |