CN113623634A - System for greatly improving low-load feed water temperature of power station boiler - Google Patents
System for greatly improving low-load feed water temperature of power station boiler Download PDFInfo
- Publication number
- CN113623634A CN113623634A CN202111037471.6A CN202111037471A CN113623634A CN 113623634 A CN113623634 A CN 113623634A CN 202111037471 A CN202111037471 A CN 202111037471A CN 113623634 A CN113623634 A CN 113623634A
- Authority
- CN
- China
- Prior art keywords
- steam
- section
- pipeline
- pressure heater
- temperature
- 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.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/003—Feed-water heater systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/16—Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged otherwise than in the boiler furnace, fire tubes, or flue ways
- F22D1/18—Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged otherwise than in the boiler furnace, fire tubes, or flue ways and heated indirectly
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/16—Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged otherwise than in the boiler furnace, fire tubes, or flue ways
- F22D1/20—Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged otherwise than in the boiler furnace, fire tubes, or flue ways and directly connected to boilers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/32—Feed-water heaters, i.e. economisers or like preheaters arranged to be heated by steam, e.g. bled from turbines
- F22D1/34—Feed-water heaters, i.e. economisers or like preheaters arranged to be heated by steam, e.g. bled from turbines and returning condensate to boiler with main feed supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/50—Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses a system for greatly improving the low-load feed water temperature of a power station boiler.A heating steam source is added on a section of steam extraction pipeline of a first high-pressure heater of a unit regenerative system, and the steam source is taken from a superheated steam system or a main steam pipeline; and a second-section external steam source pipeline is additionally arranged between the first-section steam extraction pipeline and the second-section steam extraction pipeline, and a third-section external steam source pipeline is additionally arranged between the second-section steam extraction pipeline and the third-section steam extraction pipeline. The invention adjusts the temperature of the feed water entering the boiler economizer by adjusting the steam pressure entering the first high-pressure heater, the second high-pressure heater and the third high-pressure heater, and finally achieves the purpose of adjusting the temperature of the flue gas at the inlet of the SCR reactor. The scheme is simple in technology, does not occupy a large amount of space, and meanwhile only needs to add partial pipelines and valves on the original system, so that the problems that other low-load denitration technologies are limited in arrangement space, limited in temperature raising effect, high in investment, complex in system and the like are solved.
Description
Technical Field
The invention relates to a system, in particular to a system for greatly improving the low-load feedwater temperature of a utility boiler.
Background
The energy structure mainly based on coal and the utilization of the energy structure through direct combustion are one of the main causes of air pollution. In order to ensure the air quality, the coal-fired electric boiler must adopt the advanced pollutant control technology to control the pollutant emission total amount of the coal-fired unit and execute more strict emission standards. Nowadays, a great deal of new energy development is a trend, and the action of a coal-fired unit is gradually changed from power generation to power grid peak shaving. The change of the action of the coal-fired unit causes the change of the operation parameters of the unit, and the coal-fired unit is in a half-load or low-load state most of the time.
At present, large coal-fired units are completely upgraded and modified in denitration technology, and over 90 percent of the units are selected by a Selective Catalytic Reduction (SCR) method. In order to meet the temperature window of the SCR catalyst, the inlet flue gas temperature is required to be more than 300 ℃ in the running process of the unit. When the temperature of the SCR inlet smoke is lower than 300 ℃, the SCR cannot normally operate, and the problems of ultralow NOx emission concentration, catalyst inactivation, increased ammonia slip and the like can be caused. Therefore, a low-load denitration technology is required to meet the NOx emission requirement, and the full-load and full-time stable emission requirement is achieved by processing the above full-load by the lowest technology.
The current low-load denitration technology mainly comprises the following steps: additionally arranging a water side bypass of an economizer, a flue gas bypass of the economizer, feed water recycling of the economizer, a grading economizer, zero-grade high-pressure feeding, boiler water recycling and the like. Although the existing low-load denitration technology has a lot of measures, the problems of limited layout space, limited question asking effect, high investment, complex system and the like generally exist.
Disclosure of Invention
In order to solve the defects of the technology, the invention provides a system for greatly improving the low-load feed water temperature of a utility boiler.
In order to solve the technical problems, the invention adopts the technical scheme that: a system for greatly improving the low-load feed water temperature of a power station boiler is characterized in that a path of heating steam source is added on a section of steam extraction pipeline of a first high-pressure heater of a unit regenerative system, and the steam source is taken from a superheated steam system of the boiler or a main steam pipeline from the superheated steam system to a high-pressure cylinder of a steam turbine;
and a second-section external steam source pipeline is additionally arranged between the first-section steam extraction pipeline and the second-section steam extraction pipeline, and a third-section external steam source pipeline is additionally arranged between the second-section steam extraction pipeline and the third-section steam extraction pipeline.
Furthermore, a pressure reducing valve is arranged on the heating steam source pipe; a second-section external shutoff valve is arranged on the second-section external steam source pipeline; and the three-section external connection steam source pipeline is provided with a three-section external connection shutoff valve.
The invention discloses a system for greatly improving the low-load feed water temperature of a power station boiler, which adjusts the feed water temperature entering a boiler economizer by adjusting the steam pressure of a first high-pressure heater, a second high-pressure heater and a third high-pressure heater entering a unit regenerative system, and finally achieves the purpose of adjusting the inlet flue gas temperature of an SCR (selective catalytic reduction) reactor. This scheme technique is simple, does not occupy a large amount of spaces, only needs to increase partial pipeline and valve simultaneously on original system, has solved other low-load denitration technique and has arranged the limited, temperature raising effect is limited, the investment is high, the complicated scheduling problem of system, has not only richened the technological means of low-load denitration, is favorable to energy-concerving and environment-protective simultaneously.
Drawings
Fig. 1 is a schematic view of a conventional thermal flow of the present invention.
Fig. 2 is a schematic thermal flow diagram of the present invention.
In the figure: 1. a boiler; 2. a high-pressure cylinder of the steam turbine; 3. a turbine intermediate pressure cylinder; 4. a superheated steam system; 5. a reheat steam system; 6. a coal economizer; 7. an SCR reactor; 8. a first high pressure heater; 9. a second high-pressure heater; 10. a third high-pressure heater; 11. a deaerator; 12. a feed pump; 14. a pressure reducing valve; 15. the two sections are externally connected with a shutoff valve; 16. a first-stage steam extraction check valve; 17. a first-stage steam extraction shutoff valve; 18. a two-section steam extraction check valve; 19. a two-stage steam extraction shutoff valve; 20. a three-section steam extraction check valve; 21. a three-section steam extraction shutoff valve; 22. three sections are externally connected with shut-off valves; 23. a low pressure cylinder;
a. a main steam line; b. a reheat steam line; c. a cold re-steam line; d. a water supply pipe; e. a section of steam extraction pipeline; f. a second section of steam extraction pipeline; g. three sections of steam extraction pipelines; h. newly adding a hot steam source pipeline; i. the two sections are externally connected with a steam source pipeline; j. the three sections are externally connected with a steam source pipeline; k. a primary water pipeline; l, a secondary drainage pipeline; m, three-stage drainage pipelines.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Firstly, as shown in fig. 1, a conventional thermodynamic flow chart is provided, and the conventional thermodynamic flow of a unit specifically includes:
s1, after being pressurized by a water supply pump 12, condensed water at the outlet of the deaerator 11 enters a third high-pressure heater 10 of the unit regenerative system for heating, and extracted steam of the third high-pressure heater 10 is supplied through a three-section steam extraction pipeline g and comes from a steam turbine intermediate pressure cylinder 3; the three-section steam extraction pipeline g is provided with a three-section steam extraction check valve 20 and a three-section steam extraction shutoff valve 21 which respectively play roles of preventing backflow and controlling a pipeline passage;
s2, feeding water at the outlet of a third high-pressure heater 10 of the unit regenerative system into a second high-pressure heater 9 of the unit regenerative system for heating, and feeding extracted steam of the second high-pressure heater 9 through a second-stage steam extraction pipeline f to come from a steam turbine high-pressure cylinder 2; similarly, a two-stage steam extraction check valve 18 and a two-stage steam extraction shutoff valve 19 are arranged on the two-stage steam extraction pipeline f;
s3, feeding water at the outlet of the second high-pressure heater 9 of the unit regenerative system into the first high-pressure heater 8 of the unit regenerative system for heating, and feeding extracted steam of the first high-pressure heater 9 through a section of steam extraction pipeline e to come from the high-pressure cylinder 2 of the steam turbine; similarly, a section of steam extraction check valve 16 and a section of steam extraction shutoff valve 17 are arranged on the section of steam extraction pipeline e;
s4, feeding water at the outlet of a first high-pressure heater 8 of the unit regenerative system into an economizer 6 at the tail of a boiler 1, continuously feeding high-temperature water heated by the economizer 6 into a superheated steam system 4 of the boiler 1, and feeding superheated steam generated by the superheated steam system 4 into a high-pressure cylinder 2 of a steam turbine through a main steam pipeline a to do work;
s5, the finished steam in the turbine high-pressure cylinder 2 returns to the reheat steam system 5 in the boiler 1 through a cold reheat pipeline c for heating, the reheat steam at the outlet of the reheat steam system 5 enters the turbine intermediate-pressure cylinder 3 through a reheat steam pipeline b for continuous action, and the finished steam in the turbine intermediate-pressure cylinder 3 enters the subsequent turbine low-pressure cylinder 23;
s6, enabling the flue gas in the boiler 1 to enter an SCR reactor 7 after passing through an economizer 6, and carrying out denitration treatment on the flue gas.
In addition, the drained water of the first high-pressure heater 8, the second high-pressure heater 9 and the third high-pressure heater 10 of the unit heat recovery system respectively returns to the deaerator step by step through a primary water conveying pipeline k, a secondary drainage pipeline l and a tertiary drainage pipeline m.
When the unit is reduced to a certain degree, the temperature of the flue gas at the inlet of the SCR reactor is lower than 300 ℃, and at the moment, the activity of the catalyst of the SCR catalytic reactor is seriously influenced, so that the emission of NOx pollutants of the unit is not up to the standard, and the escape rate of ammonia is greatly increased.
In order to improve the inlet flue gas temperature of an SCR reactor under the low-load working condition of a boiler, the outlet temperature of a high-pressure heater 8 of a unit regenerative system, namely the water supply temperature of an inlet of an economizer 6, needs to be greatly improved, on the basis of the existing unit regenerative system shown in figure 1, the invention designs a system for greatly improving the low-load water supply temperature of a power station boiler, and as shown in figure 2, a heating steam source is added to a section of steam extraction pipeline e of the high-pressure heater 8 of the unit regenerative system, and the steam source is taken from an overheated steam system 4 of the boiler 1 or the overheated steam system 4 to a main steam pipeline a of a steam turbine high-pressure cylinder 2; a heating steam source pipeline h is communicated with a section of steam extraction pipeline e at one end and is communicated with a main steam pipeline a at the other end; a pressure reducing valve 14 is arranged on the heating steam source pipe h;
meanwhile, a two-section external steam source pipeline i is additionally arranged between the first-section steam extraction pipeline e and the second-section steam extraction pipeline f, and a three-section external steam source pipeline j is additionally arranged between the second-section steam extraction pipeline f and the third-section steam extraction pipeline g; wherein, one end of the two-section external steam source pipeline i is communicated behind the one-section steam extraction check valve 16 on the one-section steam extraction pipeline e, and the other end is communicated behind the two-section steam extraction shut-off valve 19 on the two-section steam extraction pipeline f; one end of the three-section external steam source pipeline j is communicated behind the two-section steam extraction check valve 18 of the two-section steam extraction pipeline f, and the other end of the three-section external steam source pipeline j is communicated behind the three-section steam extraction shutoff valve 21 of the three-section steam extraction pipeline g.
Therefore, under the condition of low-load operation of the boiler, the steam source of the third high-pressure heater 10 of the unit regenerative system is changed into the steam source of the second high-pressure heater 9, so that the steam pressure entering the third high-pressure heater 10 is improved, and the water supply temperature at the outlet of the third high-pressure heater 10 of the unit regenerative system is further improved; the steam source of the second high-pressure heater 9 of the unit regenerative system is changed into the steam source of the first high-pressure heater 8 (the feedwater heater with the highest extraction pressure), so that the steam pressure entering the second high-pressure heater 9 of the unit regenerative system is improved, and the feedwater temperature at the outlet of the second high-pressure heater 9 of the unit regenerative system is further improved; the original steam turbine high-pressure cylinder 2 of the steam source of the unit regenerative system with the high-pressure heater 8 is replaced by the steam extraction of the boiler superheated steam system 4 or the main steam pipeline a, so that the steam pressure entering the unit regenerative system with the high-pressure heater 8 is improved, and the water supply temperature at the outlet of the unit regenerative system with the high-pressure heater 8 is further improved. Therefore, the feed water temperature entering the economizer 6 of the boiler 1 is greatly increased, and the inlet flue gas temperature of the SCR reactor under the low-load working condition of the boiler is finally increased, so that the aim of low-load denitration of the boiler is fulfilled.
In addition, in order to facilitate the passage control of the two-stage external steam source pipeline i and prevent the reverse flow phenomenon, a two-stage external shutoff valve 15 is arranged in the two-stage external steam source pipeline i). Similarly, a three-section external shutoff valve 22 is arranged on the three-section external steam source pipeline j.
As also shown in fig. 2, the thermodynamic process of the method for greatly increasing the low-load feedwater temperature of the utility boiler disclosed by the invention is changed into:
s1, after being pressurized by the water supply pump 12, the condensed water at the outlet of the deaerator 11 enters a third high-pressure heater 10 of the unit regenerative system for heating, and a three-section steam extraction shutoff valve 21 on a three-section steam extraction pipeline g is closed; the extracted steam of the steam turbine high-pressure cylinder 2 enters the third high-pressure heater 10 through a second-stage steam extraction pipeline f, a second-stage steam extraction check valve 18, a third-stage external steam source pipeline j and a third-stage external shutoff valve 22; at the moment, the steam source of the third high-pressure heater 10 is changed into the heating steam source of the original unit heat recovery system second high-pressure heater 9; as the steam pressure entering the third high-pressure heater 10 rises, the saturated steam temperature of the steam rises, and the feed water temperature at the outlet of the third high-pressure heater 10 of the unit heat recovery system rises;
s2, feeding water at the outlet of a third high-pressure heater 19 of the unit heat recovery system into a second high-pressure heater 9 for heating, and closing a second-stage steam extraction shutoff valve 19 on a second-stage steam extraction pipeline f; steam extracted by the steam turbine high-pressure cylinder 2 enters a second high-pressure heater 9 of the heat recovery system of the unit through a first-stage steam extraction pipeline e, a first-stage steam extraction check valve 16, a second-stage external steam source pipeline i and a second-stage external shutoff valve 15; at the moment, the heat source of the second high-pressure heater 9 is changed into the heating steam source of the first high-pressure heater 8 of the original unit regenerative system; as the steam pressure of the second high-pressure heater 9 rises, the saturated steam temperature of the steam is increased, and the feed water temperature at the outlet of the second high-pressure heater 9 of the unit heat recovery system rises;
s3, feeding water at the outlet of the second high-pressure heater 9 of the unit heat recovery system into the first high-pressure heater 8 for heating, and closing the first steam extraction shutoff valve 17 on the first steam extraction pipeline e; part of superheated steam is taken from the superheated steam system 4 or the main steam pipeline a of the boiler 1 as a steam source of a first high-pressure heater 8 of the regenerative system of the unit, and the superheated steam enters the first high-pressure heater 8 of the regenerative system of the unit after passing through a newly-increased heat pipeline h and a pressure reducing valve 14; at this time, the heating steam source of the first high-pressure heater 8 becomes superheated steam after decompression; as the steam pressure of the first high-pressure heater 8 entering the heat recovery system of the unit rises, the saturated steam temperature of the steam rises, and the water supply temperature of the outlet of the first high-pressure heater 8 of the heat recovery system of the unit rises;
s4, feeding water from the outlet of the first high-pressure heater 8 after temperature rise into a tail economizer 6 of the boiler 1, heating the water by the economizer 6, feeding the high-temperature fed water into the superheated steam system 4 of the boiler 1, and feeding the superheated steam generated by the superheated steam system 4 into the high-pressure cylinder 2 of the steam turbine through a main steam pipeline a to do work;
s5, the steam which has done work in the turbine high pressure cylinder 2 continuously returns to the reheat steam system 5 in the boiler 1 through a cold reheat steam pipeline c for heating, the reheat steam at the outlet of the reheat steam system 5 enters the turbine intermediate pressure cylinder 3 through a reheat steam pipeline b for continuous action, and the steam which has done work in the turbine intermediate pressure cylinder 3 enters the subsequent turbine low pressure cylinder 23;
and S6, enabling the flue gas of the boiler 1 to enter the SCR reactor after passing through the economizer 6, and carrying out denitration treatment on the flue gas.
In addition, the drained water of the first high-pressure heater 8, the second high-pressure heater 9 and the third high-pressure heater 10 of the unit heat recovery system respectively returns to the deaerator 11 step by step through the primary water conveying pipeline k, the secondary drainage pipeline l and the tertiary drainage pipeline m.
Because the heat transfer of the first high-pressure heater 8, the second high-pressure heater 9 and the third high-pressure heater 10 of the unit heat return system is mainly limited by the self water supply end difference, the water supply end difference refers to that: the difference value between the saturated steam temperature corresponding to the steam inlet pressure of the heater and the water supply temperature at the outlet of the heater. This means that: the higher the steam pressure entering the heater, the higher the saturation temperature of the steam and the higher the feedwater temperature at the heater outlet. When the extraction pressure of each stage of high-pressure heater entering the heat recovery system of the unit rises, the corresponding saturated steam temperature rises, and the water supply temperature of the outlet of each stage of high-pressure heater also rises. And the rising of the feed water temperature is finally the rising of the flue gas temperature at the inlet of the SCR reactor 7, so that the denitration temperature requirement is met under the low-load working condition of the boiler 1.
Under the working condition of low load of the boiler 1, when the temperature of flue gas at the inlet of the SCR reactor 7 is lower, firstly, the opening of a pressure reducing valve 14 on a newly-added hot steam source pipeline h is adjusted, so that the steam inlet pressure of a unit regenerative system with the higher inlet of 8 is increased, and the water supply temperature of the unit regenerative system with the higher inlet of 8 is increased; secondly, opening the opening degree of a second-section external shutoff valve 16 on a second-section external steam source pipeline i, so that the steam inlet pressure of a second high-pressure steam inlet 9 of the heat regenerative system of the unit is increased, and the water supply temperature of an outlet of the second high-pressure steam inlet 9 of the heat regenerative system of the unit is increased; opening the three-section external shutoff valve 22 on the three-section external steam source pipeline j again, so that the steam inlet pressure of the third high-pressure heater 10 of the heat regenerative system of the unit is increased, and the water supply temperature of the third high-pressure heater 10 outlet of the heat regenerative system of the unit is increased. Through the adjustment, the effect of greatly improving the temperature of the water supply at the outlet of the unit regenerative system with the high-load 8 is achieved, and finally the purpose of improving the temperature of the flue gas at the inlet of the SCR reactor 7 with low load of the boiler 1 is achieved.
So far, according to the change situation of the inlet flue gas temperature of the SCR reactor 7, the regulation is repeated.
Therefore, the system for greatly improving the low-load water supply temperature of the utility boiler disclosed by the invention can greatly improve the water supply temperature entering a boiler economizer, finally improve the inlet flue gas temperature of the SCR reactor under the low-load working condition of the boiler, ensure the activity of the SCR catalyst under low load and widen the technical range of low-load denitration of the boiler. The method has the advantages of simple technology, no occupation of a large amount of space, and only addition of partial pipelines and valves on the original system, solves the problems of limited arrangement space, limited temperature raising effect, high investment, complex system and the like of other low-load denitration technologies, enriches the technical means of low-load denitration, and is beneficial to energy conservation and environmental protection.
The above embodiments are not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make variations, modifications, additions or substitutions within the technical scope of the present invention.
Claims (2)
1. The utility model provides a system for improve power plant boiler low-load feedwater temperature by a wide margin which characterized in that: a path of heating steam source is added on a section of steam extraction pipeline (e) of a first high-pressure heater (8) of a unit regenerative system, and the steam source is taken from a superheated steam system (4) of a boiler (1) or a main steam pipeline (a) from the superheated steam system (4) to a high-pressure cylinder (2) of a steam turbine; a two-section external steam source pipeline (i) is additionally arranged between the first-section steam extraction pipeline (e) and the second-section steam extraction pipeline (f), and a three-section external steam source pipeline (j) is additionally arranged between the second-section steam extraction pipeline (f) and the three-section steam extraction pipeline (g).
2. The system for substantially increasing the temperature of utility boiler low load feedwater according to claim 1, wherein: a pressure reducing valve (14) is arranged on the heating steam source pipe (h); a two-section external shutoff valve (15) is arranged on the two-section external steam source pipeline (i); three external shutoff valves (22) are arranged on the three external steam source pipelines (j).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111037471.6A CN113623634A (en) | 2021-09-06 | 2021-09-06 | System for greatly improving low-load feed water temperature of power station boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111037471.6A CN113623634A (en) | 2021-09-06 | 2021-09-06 | System for greatly improving low-load feed water temperature of power station boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113623634A true CN113623634A (en) | 2021-11-09 |
Family
ID=78389165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111037471.6A Pending CN113623634A (en) | 2021-09-06 | 2021-09-06 | System for greatly improving low-load feed water temperature of power station boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113623634A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114383129A (en) * | 2021-12-09 | 2022-04-22 | 广西电网有限责任公司电力科学研究院 | Method for adjusting main steam temperature of boiler with four tangential points of coal-electric machine set |
| CN114413251A (en) * | 2021-12-09 | 2022-04-29 | 广西电网有限责任公司电力科学研究院 | System for adjusting main steam temperature of Pi type hedging once-through boiler |
-
2021
- 2021-09-06 CN CN202111037471.6A patent/CN113623634A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114383129A (en) * | 2021-12-09 | 2022-04-22 | 广西电网有限责任公司电力科学研究院 | Method for adjusting main steam temperature of boiler with four tangential points of coal-electric machine set |
| CN114413251A (en) * | 2021-12-09 | 2022-04-29 | 广西电网有限责任公司电力科学研究院 | System for adjusting main steam temperature of Pi type hedging once-through boiler |
| CN114413251B (en) * | 2021-12-09 | 2023-10-27 | 广西电网有限责任公司电力科学研究院 | System for adjusting main steam temperature of Pi-type opposite-flow direct-current boiler |
| CN114383129B (en) * | 2021-12-09 | 2023-10-31 | 广西电网有限责任公司电力科学研究院 | Method for adjusting main steam temperature of four-corner tangential boiler of coal motor group |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113623634A (en) | System for greatly improving low-load feed water temperature of power station boiler | |
| CN203756252U (en) | Turbine regenerative system of ultra supercritical unit | |
| CN112197258A (en) | Stable operation system and method for denitration device in emergency operation without shutdown of coal-electricity machine | |
| CN103234364B (en) | Device with griddle and process for generating power by efficiently recycling sinter waste heat | |
| CN111649349A (en) | Full-load denitration system for deep peak shaving of boiler and operation method thereof | |
| CN107149873B (en) | Energy-saving full-load denitration system | |
| CN112283693A (en) | Automatic control system and method for smoke temperature and water temperature in low-temperature economizer of thermal power generating unit | |
| CN206694081U (en) | A kind of heat regenerative system for thermal power plant | |
| CN112065520B (en) | Cold and hot re-cooperative steam supply system and method | |
| CN113154356A (en) | High-temperature steam composite thermodynamic system and utilization method thereof | |
| CN112944431A (en) | Heating system and method for energy gradient utilization | |
| CN106765039B (en) | A kind of SCR inlet flue gas water side temperature raising system and method | |
| CN106705019A (en) | Wide-load efficient water supply regenerative system | |
| CN110553245A (en) | System for improving wide-load operation thermal efficiency of coal-fired unit | |
| CN216203276U (en) | System for greatly improving low-load feed water temperature of power station boiler | |
| CN210473607U (en) | Full-load SCR denitration system of coal-fired boiler | |
| CN112303604A (en) | Economizer temperature governing system that unit start-up process denitration was put into | |
| CN217082504U (en) | Wide-load denitration system with stable combustion performance of boiler | |
| CN113405086B (en) | Steam mixing system for realizing denitration and temperature raising and adjusting method thereof | |
| CN213577455U (en) | Stable denitration device commissioning system for shutdown emergency operation of coal electric unit without stopping furnace | |
| CN206439807U (en) | Wide load high-efficiency feedwater heat regenerative system | |
| CN109114583B (en) | Flue gas waste heat utilization system of coal-fired power plant and working method | |
| CN109372602B (en) | Steam coupling system and method for biomass incinerator and coal-fired unit | |
| CN203584486U (en) | Regenerative system of steam turbine generator unit | |
| CN113107621A (en) | 650 ℃ high-efficiency supercritical (super-supercritical) coal-fired power generation system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |