High-temperature and high-pressure superheated steam storage system of thermal generator set

Abstract

The high-temperature and high-pressure superheated steam storage system comprises a boiler and a high-pressure bypass temperature and pressure reducer, the input end is provided with a unit high-pressure cylinder inlet valve, and the output end is connected with a high-pressure cylinder, a unit high-pressure bypass valve and a steam pressure balancer inner cylinder. Through improvement, a single double-layer cylinder steam pressure balancer forms an array, so that high-temperature and high-pressure superheated steam is stored, and the stored steam passes through an outlet mother pipe of an inner cylinder or an outer cylinder of the steam pressure balancer and then passes through a control valve to enter a fast-assembled steam turbine to do work, drag a generator to generate electricity or enter a main steam turbine to generate electricity. The total output electric power of the unit is quickly increased; on the contrary, when the power demand of the power grid is rapidly reduced, redundant high-temperature and high-pressure superheated steam generated by the boiler is rapidly stored in the steam pressure balancer array, and the total output electric power of the unit is rapidly reduced. The demand of matching rapid load change of a power grid is effectively met, and the safety and stability of power grid operation are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal power generation and thermal energy storage, and in particular to a high-temperature and high-pressure superheated steam storage system for a thermal power generating set. Background Art

[0002] With the development of China's economy and society and the improvement of living standards, the demand for electricity has increased rapidly, and the absolute value of the peak-to-valley difference in the grid load has increased, reaching 1 / 3 of the maximum load of the grid. At the same time, the frequency of large and rapid fluctuations in the grid load has also increased. In addition, the large-scale grid connection of renewable energy wind power and photovoltaic power generation has caused the frequency of large and rapid fluctuations in the grid load to be very large.

[0003] However, due to the types of power generation and structural characteristics of China's power grid, the tasks of power grid frequency regulation, peak regulation and rapid load climbing are mainly undertaken by coal-fired thermal power generating units, while the load characteristics of in-service thermal power units or heating units and the power generation load adjustment capabilities and rates cannot meet the power grid frequency regulation, peak regulation and rapid load climbing requirements.

[0004] In order to tap and give full play to the potential and advantages of thermal power generating units, using their advantages of high power, long duration, and not being affected by weather, climate, geography, day and night, and seasons, they can play the role of stabilizer and regulator for the power supply of the power grid. However, the speed of generating new steam by the boiler of the thermal power generating unit is slow, and it lags behind the load change signal of the power grid by 6 to 10 minutes. The response rate of the power output of the steam turbine generator is extremely mismatched with the load change rate of the power grid, which seriously affects the safety and stability of the power grid operation.

[0005] In order to overcome this shortcoming, the high-temperature and high-pressure superheated steam of part of its energy medium is directly stored by utilizing the large energy capacity of thermal power units, so as to form a thermal energy with high grade and high working capacity of high-temperature and high-pressure superheated steam of thermal power units, which is directly stored. When the power grid needs a large and rapid increase in power, the stored steam quickly enters the fast-installed steam turbine to generate power and drive the generator to generate electricity; when the power grid quickly reduces the load, the steam pressure balancer quickly absorbs and stores excess superheated steam, and quickly reduces the power output of the thermal power host. In this way, the shortcomings of the serious lag in the generation of steam and the reduction of the steam generation process of the thermal power unit boiler are overcome, and the purpose of energy saving is also achieved. In this way, the thermal power generation host can be coupled to match the rapid load change requirements of the power grid. Utility Model Content

[0006] In view of the above technical problems in the related technology, the utility model proposes a high-temperature and high-pressure superheated steam storage system for a thermal power generating set, which can overcome the above shortcomings of the prior art.

[0007] In order to achieve the above technical purpose, the technical solution of the utility model is implemented as follows:

[0008] A high-temperature and high-pressure superheated steam storage system for a thermal power generating unit;

[0009] The high-temperature and high-pressure superheated steam storage system of the thermal power generating set comprises a boiler and a thermal power generating set high-pressure bypass temperature and pressure reducing device, wherein the input end of the boiler is provided with a thermal power generating set high-pressure cylinder inlet valve, and the output end of the boiler is respectively connected with the high-pressure cylinder, the thermal power generating set high-pressure bypass valve, and the steam pressure balancer inner cylinder;

[0010] The input end of the steam pressure balancer inner cylinder is provided with a steam pressure balancer inner cylinder inlet valve, the input end of the thermal power unit high-pressure bypass temperature and pressure reducer is provided with a thermal power unit high-pressure bypass valve, and the output end of the high-pressure cylinder is connected to the cold end of the boiler reheater; the output end pipeline branch of the steam pressure balancer inner cylinder is connected to the quick-installed steam turbine bypass valve, and is further connected to the high-pressure bypass system of the unit;

[0011] The inner cylinder outlet valve of the steam pressure balancer is connected to the quick-assembled steam turbine, the quick-assembled steam turbine is connected to the first generator, and the output end of the first generator is connected to the first main transformer of the unit.

[0012] Further, the reheat steam hot end of the boiler is connected to the steam pressure balancer outer cylinder inlet valve, and the steam pressure balancer outer cylinder inlet valve is connected to the steam pressure balancer outer cylinder;

[0013] The steam pressure balancer outer cylinder is connected to the steam pressure balancer outer cylinder outlet valve, the steam pressure balancer outer cylinder outlet valve is connected to the steam pressure balancer outer cylinder outlet steam pressure regulator, and is further connected to the thermal power generator set intermediate pressure cylinder inlet valve and intermediate pressure cylinder;

[0014] The pipeline branch before the steam pressure balancer outer cylinder outlet valve of the steam pressure balancer outer cylinder is connected to the steam pressure balancer outer cylinder steam entering the quick-installed steam turbine control valve, further connected to the steam pressure balancer array outer cylinder outlet mother pipe, further connected to the steam pressure balancer inner cylinder outlet valve, and further connected to the quick-installed steam turbine;

[0015] The stored high-temperature and high-pressure superheated steam is connected to the inlet of the high-pressure cylinder of the main steam turbine through the main steam turbine valve under some operating conditions.

[0016] Further, a plurality of steam pressure balancers are connected to form an array through an inner cylinder outlet main pipe of the steam pressure balancer array and an outer cylinder outlet main pipe of the steam pressure balancer array;

[0017] The steam pressure balancer array inner cylinder outlet mother pipe is connected to the steam pressure balancer inner cylinder outlet valve, and the steam pressure balancer array outer cylinder outlet mother pipe is connected to the quick-installed steam turbine inlet regulating valve.

[0018] Furthermore, the high-temperature and high-pressure superheated steam stored in the steam pressure balancer inner cylinder and the steam pressure balancer outer cylinder can be used for the quick-assembled steam turbine to perform external work and drive the first generator or the second generator to generate electricity.

[0019] Furthermore, high-temperature and high-pressure superheated steam can be stored by connecting several individual steam pressure balancers in parallel to form an array arrangement;

[0020] High-temperature and high-pressure superheated steam passes through the inlet main pipe of the steam pressure balancer inner cylinder and the respective inlet valves into the inner cylinder of the single steam pressure balancer for storage; high-temperature and high-pressure reheated steam passes through the inlet main pipe of the steam pressure balancer inner cylinder and the respective inlet valves into the outer cylinder of the single steam pressure balancer for storage.

[0021] Furthermore, high-temperature and high-pressure superheated steam passes through the respective outlet valves from the inner cylinder of the steam pressure balancer, enters the outlet main pipe in turn, passes through the outlet valve of the inner cylinder of the steam pressure balancer, and then enters the quick-installed steam turbine to perform external work, driving the first generator or the second generator to generate electricity.

[0022] Furthermore, high-temperature and high-pressure reheated steam exits from the steam pressure balancer outer cylinder outlet, passes through the steam pressure balancer outer cylinder outlet main pipe, and enters the quick-installed steam turbine alone or mixed with the high-temperature and high-pressure superheated steam in the steam pressure balancer inner cylinder through the steam pressure balancer inner cylinder outlet valve to perform external work, thereby driving the first generator or the second generator to generate electricity.

[0023] Furthermore, the steam pressure balancer is a double-layer cylinder structure, and the inner cylinder of the steam pressure balancer stores high-temperature and high-pressure superheated steam, the steam source is boiler fresh steam or other steam sources, the pressure is Pn, Pn = 3MPa ~ 18MPa, the temperature is Tn, Tn = 350℃ ~ 580℃;

[0024] The outer cylinder of the steam pressure balancer stores high-temperature and high-pressure superheated steam. The steam source is boiler reheat steam or other steam sources. The pressure is Pw, Pw = 3MPa ~ 10MPa, and the temperature is Tw, Tw = 350℃ ~ 580℃.

[0025] Furthermore, the steam pressure balancer has a double-cylinder structure, the inner cylinder of the steam pressure balancer stores high-temperature and high-pressure superheated steam, the steam source is boiler new steam or other steam sources, the pressure is Pn, and the temperature is Tn; the outer cylinder of the steam pressure balancer stores high-temperature and high-pressure superheated steam, the steam source is boiler reheat steam or other steam sources, the pressure is Pw, and the temperature is Tw; wherein, pressure Pn>Pw=(1 / 2~1 / 3)Pn, temperature Tw=Tn.

[0026] Furthermore, the steam inlet pressure of the quick-assembled steam turbine is P0″=3~18MPa, T0″=350~580℃, the rated speed n≥3000~7200 rpm, and the relative internal efficiency η= 89~93%.

[0027] The beneficial effects of the utility model are as follows: through the optimized and improved design of the product of the utility model, in a single double-layer cylinder steam pressure balancer, that is, the high-temperature and high-pressure superheated steam generated by the thermal power unit, is stored in the inner cylinder and the outer cylinder of the double-layer cylinder steam pressure balancer, which is composed of a single array, so that the high-temperature and high-pressure superheated steam can be stored, and the stored high-temperature and high-pressure superheated steam passes through the outlet mother pipe of the inner cylinder or the outer cylinder of the steam pressure balancer, and then enters the quick-installed steam turbine through the control valve to do work, driving the generator to generate electricity; thereby overcoming the shortcomings of the thermal power unit boiler in generating steam and reducing the serious lag in the steam generation process, achieving the purpose of energy saving, and at the same time effectively solving the need to match the rapid load changes of the power grid, and improving the safety and stability of the power grid operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a structural schematic diagram of a high-temperature and high-pressure superheated steam storage system for a thermal power generator set according to an embodiment of the utility model;

[0030] In the figure: 1. boiler superheater; 2. boiler reheater; 3. steam pressure balancer inner cylinder inlet valve; 4. steam pressure balancer outer cylinder inlet valve; 5. steam pressure balancer inner cylinder outlet valve; 6. steam pressure balancer outer cylinder outlet valve; 7. thermal power generator set high pressure cylinder inlet valve; 8. thermal power generator set medium pressure cylinder inlet valve; 9. thermal power generator set low pressure cylinder inlet valve; 10. thermal power generator set high pressure bypass valve; 11. thermal power generator set medium pressure cylinder extraction steam into the heat network control valve; 12. steam pressure regulator at the steam pressure balancer outer cylinder outlet; 15. Boiler; 16. Steam pressure balancer; 17. Steam pressure balancer inner cylinder; 18. Steam pressure balancer outer cylinder; 19. Quick-install steam turbine; 20. High-pressure cylinder; 21. Medium-pressure cylinder; 22. Medium-pressure cylinder; 23. High-pressure bypass temperature and pressure reducer of thermal power unit; 24. Steam from steam pressure balancer outer cylinder enters quick-install steam turbine control valve; 25. Quick-install steam turbine bypass valve; 26. First steam pressure balancer inner cylinder array outlet valve; 27. Second steam pressure balancer inner cylinder array outlet valve; 28. Third steam pressure balancer inner cylinder array outlet valve; 29. ​​Steam pressure balancer array inner cylinder outlet mother pipe; 30. Steam pressure balancer array outer cylinder outlet mother pipe; 31. Steam pressure balancer array outer cylinder inlet mother pipe; 32. Steam Main pipe at the inlet of the inner cylinder of the steam pressure balancer array; 33, without the main steam turbine valve; 34, without the high-pressure bypass system of the unit; 35, without the main steam turbine system; 36, heating network heater; 37, the first generator; 38, the first without the main transformer of the unit; 39, the second generator; 40, the second without the main transformer of the unit; 41, the first exhaust end; 42, the second exhaust end; Pr, boiler reheat steam pressure; Tr, boiler reheat steam temperature; P0, superheated steam pressure at the inlet of the inner cylinder of the steam pressure balancer; T0, superheated steam temperature at the inlet of the inner cylinder of the steam pressure balancer; P0', new superheated steam pressure of the boiler; T0', new superheated steam temperature of the boiler; P0″, superheated steam pressure at the inlet of the quick-installed steam turbine; T0″, superheated steam temperature at the inlet of the quick-installed steam turbine. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0032] It should be understood that in the description of the embodiments of the present utility model, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0033] like Figure 1 As shown, a high-temperature and high-pressure superheated steam storage system for a thermal power generator set according to an embodiment of the utility model comprises a boiler 15 and a thermal power generator set high-pressure bypass temperature and pressure reducer 23, the input end of the boiler 15 is provided with a thermal power generator set high-pressure cylinder inlet valve 7, and the output end of the boiler 15 is respectively connected to the high-pressure cylinder 20, the thermal power generator set high-pressure bypass valve 10, and the steam pressure balancer inner cylinder 17;

[0034] The input end of the steam pressure balancer inner cylinder 17 is provided with a steam pressure balancer inner cylinder inlet valve 3, the input end of the thermal power unit high-pressure bypass temperature and pressure reducer 23 is provided with a thermal power unit high-pressure bypass valve 10, and the output end of the high-pressure cylinder 20 is connected to the reheater cold end of the boiler 15; the output end pipeline branch of the steam pressure balancer inner cylinder 17 is connected to the quick-installed turbine bypass valve 25, and is further connected to the unit high-pressure bypass system 34;

[0035] The steam pressure balancer inner cylinder outlet valve 5 is connected to the quick-assembled steam turbine 19 , the quick-assembled steam turbine 19 is connected to the first generator 37 , and the output end of the first generator 37 is connected to the first de-unit main transformer 38 .

[0036] In a specific embodiment, the reheat steam hot end of the boiler 15 is connected to the steam pressure balancer outer cylinder inlet valve 4, and the steam pressure balancer outer cylinder inlet valve 4 is connected to the steam pressure balancer outer cylinder 18;

[0037] The steam pressure balancer outer cylinder 18 is connected to the steam pressure balancer outer cylinder outlet valve 6, and the steam pressure balancer outer cylinder outlet valve 6 is connected to the steam pressure balancer outer cylinder outlet steam pressure regulator 12, and further connected to the thermal power generator set intermediate pressure cylinder inlet valve 8 and intermediate pressure cylinder 21;

[0038] The pipeline branch before the steam pressure balancer outer cylinder outlet valve 6 of the steam pressure balancer outer cylinder 18 is connected to the steam pressure balancer outer cylinder steam entering the quick-installed steam turbine control valve 24, further connected to the steam pressure balancer array outer cylinder outlet mother pipe 30, further connected to the steam pressure balancer inner cylinder outlet valve 5, and further connected to the quick-installed steam turbine 19;

[0039] The stored high-temperature and high-pressure superheated steam is connected to the inlet of the high-pressure cylinder of the main steam turbine through the main steam turbine valve 33 under some operating conditions.

[0040] In a specific embodiment, a plurality of steam pressure balancers 16 are connected to form an array through a steam pressure balancer array inner cylinder outlet header 29 and a steam pressure balancer array outer cylinder outlet header 30;

[0041] The steam pressure balancer array inner cylinder outlet mother pipe 29 is connected to the steam pressure balancer inner cylinder outlet valve 5, and the steam pressure balancer array outer cylinder outlet mother pipe 30 is connected to the quick-installed steam turbine inlet regulating valve.

[0042] In a specific embodiment, the high-temperature and high-pressure superheated steam stored in the steam pressure balancer inner cylinder 17 and the steam pressure balancer outer cylinder 18 can be used for the quick-installed steam turbine 19 to perform external work and drive the first generator 37 or the second generator 39 to generate electricity.

[0043] In a specific embodiment, high-temperature and high-pressure superheated steam can be stored by connecting a plurality of individual steam pressure balancers 16 in parallel to form an array arrangement;

[0044] High-temperature and high-pressure superheated steam passes through the inlet main pipe of the steam pressure balancer inner cylinder 17 and the respective inlet valves into the monomer steam pressure balancer inner cylinder 17 for storage; high-temperature and high-pressure reheated steam passes through the inlet main pipe of the steam pressure balancer inner cylinder 17 and the respective inlet valves into the monomer steam pressure balancer outer cylinder 18 for storage.

[0045] In a specific embodiment, high-temperature and high-pressure superheated steam passes through the respective outlet valves from the inner cylinder 17 of the steam pressure balancer, enters the outlet main pipe in turn, passes through the inner cylinder outlet valve 5 of the steam pressure balancer, and then enters the quick-installed steam turbine 19 to perform external work, driving the first generator 37 or the second generator 39 to generate electricity.

[0046] In a specific embodiment, high-temperature and high-pressure reheated steam exits from the steam pressure balancer outer cylinder 18, passes through the outlet main pipe of the steam pressure balancer outer cylinder 18, and enters the quick-installed steam turbine 19 alone or mixed with the high-temperature and high-pressure superheated steam of the steam pressure balancer inner cylinder 17 through the steam pressure balancer inner cylinder outlet valve 5 to perform external work, thereby driving the first generator 37 or the second generator 39 to generate electricity.

[0047] In a specific embodiment, the steam pressure balancer 16 is a double-layer cylinder structure, and the inner cylinder 17 of the steam pressure balancer stores high-temperature and high-pressure superheated steam, the steam source is the new steam from the boiler 15 or other steam sources, the pressure is Pn, Pn = 3MPa ~ 18MPa, the temperature is Tn, Tn = 350 ° C ~ 580 ° C;

[0048] The steam pressure balancer outer cylinder 18 stores high-temperature and high-pressure superheated steam. The steam source is the reheated steam from the boiler 15 or other steam sources. The pressure is Pw, Pw=3MPa~10MPa, and the temperature is Tw, Tw=350℃~580℃.

[0049] In a specific embodiment, the steam pressure balancer 16 is a double-layer cylinder structure, the inner cylinder 17 of the steam pressure balancer stores high-temperature and high-pressure superheated steam, the steam source is the new steam of the boiler 15 or other steam sources, the pressure is Pn, and the temperature is Tn. The outer cylinder 18 of the steam pressure balancer stores high-temperature and high-pressure superheated steam, the steam source is the reheated steam of the boiler 15 or other steam sources, the pressure is Pw, and the temperature is Tw; wherein, the pressure Pn>Pw=(1 / 2~1 / 3)Pn, and the temperature Tw=Tn.

[0050] In a specific embodiment, the steam inlet pressure P0″ of the quick-assembled steam turbine 19 is 3-18 MPa, T0″ is 350-580° C., the rated speed n is ≥ 3000-7200 rpm, and the relative internal efficiency η is 89-93%.

[0051] In order to facilitate understanding of the above technical solution of the present invention, the above technical solution of the present invention is described in detail below through specific usage.

[0052] In specific use, a high-temperature and high-pressure superheated steam storage system for a thermal power generator set according to the utility model includes a boiler 15, the output end of the boiler 15 is respectively connected to the high-pressure cylinder 20, the high-pressure bypass valve 10 of the thermal power generator set, and the steam pressure balancer inner cylinder 17, and the new high-temperature and high-pressure superheated steam of the thermal power generator set is stored in the steam pressure balancer inner cylinder 17.

[0053] The input end of the high-pressure cylinder 20 is provided with a high-pressure cylinder inlet valve 7 of the thermal power generator set;

[0054] The input end of the steam pressure balancer inner cylinder 17 is provided with a steam pressure balancer inner cylinder inlet valve 3;

[0055] The input end of the thermal power unit high-pressure bypass temperature and pressure reducer 23 is provided with a thermal power unit high-pressure bypass valve 10;

[0056] The output end of the high pressure cylinder 20 is connected to the cold end of the reheater of the boiler 15;

[0057] The output end of the steam pressure balancer inner cylinder 17 is connected to the steam pressure balancer inner cylinder outlet valve 5;

[0058] The output end of the high-pressure bypass temperature and pressure reducing device 23 of the thermal power unit is connected to the cold end of the reheater of the boiler 15;

[0059] The output end pipeline branch of the steam pressure balancer inner cylinder 17 is connected to the quick-installed turbine bypass valve 25, and is further connected to the high-pressure bypass system of the unit.

[0060] Further,

[0061] The steam pressure balancer inner cylinder outlet valve 5 is also the quick-installed steam turbine inlet valve. The steam pressure balancer inner cylinder outlet valve 5 is connected to the quick-installed steam turbine 19. The quick-installed steam turbine 19 is connected to the first generator 37. The output end of the first generator 37 is connected to the first de-unit main transformer 38.

[0062] The hot end of the reheated steam of the boiler 15 is connected to the steam pressure balancer outer cylinder inlet valve 4, and the steam pressure balancer outer cylinder inlet valve 4 is connected to the steam pressure balancer outer cylinder 18; the high-temperature and high-pressure superheated steam reheated by the thermal power generator set is stored in the steam pressure balancer outer cylinder 18.

[0063] The steam pressure balancer outer cylinder 18 is connected to the steam pressure balancer outer cylinder outlet valve 6, the steam pressure balancer outer cylinder outlet valve 6 is connected to the steam pressure balancer outer cylinder outlet steam pressure regulator 12, and is further connected to the thermal power generator set intermediate pressure cylinder inlet valve 8 and intermediate pressure cylinder 21;

[0064] The pipeline branch in front of the steam pressure balancer outer cylinder outlet valve 6 of the steam pressure balancer outer cylinder 18 is connected to the steam pressure balancer outer cylinder steam entering the quick-installed steam turbine control valve 24, further connected to the steam pressure balancer array outer cylinder outlet mother pipe 30, further connected to the steam pressure balancer inner cylinder outlet valve 5, and further connected to the quick-installed steam turbine 19.

[0065] A plurality of steam pressure balancers 16 are connected to form an array through the steam pressure balancer inner cylinder outlet mother pipe and the outer cylinder outlet mother pipe. The steam pressure balancer inner cylinder outlet mother pipe is connected to the quick-installed steam turbine inlet regulating valve 5. In addition, the steam pressure balancer outer cylinder outlet mother pipe is connected to the quick-installed steam turbine inlet regulating valve 5. High-temperature and high-pressure superheated steam enters the quick-installed steam turbine to perform work and drive the generator to generate electricity.

[0066] To sum up, with the help of the above-mentioned technical scheme of the utility model, through the optimization and improvement design of the product of the utility model, in a single double-layer cylinder steam pressure balancer, that is, the high-temperature and high-pressure superheated steam generated by the thermal power unit, is stored in the inner cylinder and the outer cylinder of the double-layer cylinder steam pressure balancer, and the array is composed of a single unit, so that the high-temperature and high-pressure superheated steam can be stored. The stored high-temperature and high-pressure superheated steam passes through the outlet mother pipe of the inner cylinder or the outer cylinder of the steam pressure balancer, and then enters the fast-installed steam turbine through the control valve to do work, driving the generator to generate electricity; thereby overcoming the shortcomings of the thermal power unit boiler in generating steam and reducing the serious lag in the steam generation process, achieving the purpose of energy saving, and at the same time effectively solving the need to match the rapid load changes of the power grid, and improving the safety and stability of the power grid operation.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-temperature and high-pressure superheated steam storage system for a thermal power generating unit, characterized in that: It comprises a boiler (15) and a thermal power unit high-pressure bypass temperature and pressure reducing device (23), wherein the input end of the boiler (15) is provided with a thermal power unit high-pressure cylinder inlet valve (7), and the output end of the boiler (15) is respectively connected to the high-pressure cylinder (20), the thermal power unit high-pressure bypass valve (10), and the steam pressure balancer inner cylinder (17); The input end of the steam pressure balancer inner cylinder (17) is provided with a steam pressure balancer inner cylinder inlet valve (3); the input end of the thermal power unit high-pressure bypass temperature and pressure reducing device (23) is provided with a thermal power unit high-pressure bypass valve (10); the output end of the high-pressure cylinder (20) is connected to the reheater cold end of the boiler (15); the output end pipeline branch of the steam pressure balancer inner cylinder (17) is connected to the quick-installed turbine bypass valve (25), and is further connected to the unit high-pressure bypass system (34); The steam pressure balancer inner cylinder outlet valve (5) is connected to the quick-installed steam turbine (19), the quick-installed steam turbine (19) is connected to the first generator (37), and the output end of the first generator (37) is connected to the first de-unit main transformer (38).

2. A high-temperature and high-pressure superheated steam storage system for a thermal power generating unit according to claim 1, characterized in that: The reheat steam hot end of the boiler (15) is connected to the steam pressure balancer outer cylinder inlet valve (4), and the steam pressure balancer outer cylinder inlet valve (4) is connected to the steam pressure balancer outer cylinder (18); The steam pressure balancer outer cylinder (18) is connected to the steam pressure balancer outer cylinder outlet valve (6), the steam pressure balancer outer cylinder outlet valve (6) is connected to the steam pressure balancer outer cylinder outlet steam pressure regulator (12), and is further connected to the thermal power generator set intermediate pressure cylinder inlet valve (8) and the intermediate pressure cylinder (21); A pipeline branch before the steam pressure balancer outer cylinder outlet valve (6) of the steam pressure balancer outer cylinder (18) is connected to the steam pressure balancer outer cylinder steam entering the quick-installed steam turbine control valve (24), further connected to the steam pressure balancer array outer cylinder outlet mother pipe (30), further connected to the steam pressure balancer inner cylinder outlet valve (5), and further connected to the quick-installed steam turbine (19); The stored high-temperature and high-pressure superheated steam is connected to the inlet of the high-pressure cylinder of the main steam turbine through the main steam turbine valve (33) under certain operating conditions.

3. A high-temperature and high-pressure superheated steam storage system for a thermal power generating unit according to claim 2, characterized in that: A plurality of steam pressure balancers (16) are connected to form an array through a steam pressure balancer array inner cylinder outlet mother pipe (29) and a steam pressure balancer array outer cylinder outlet mother pipe (30); The steam pressure balancer array inner cylinder outlet mother pipe (29) is connected to the steam pressure balancer inner cylinder outlet valve (5), and the steam pressure balancer array outer cylinder outlet mother pipe (30) is connected to the quick-installed steam turbine inlet regulating valve.

4. A high-temperature and high-pressure superheated steam storage system for a thermal power generating unit according to claim 1 or 2, characterized in that: The high-temperature and high-pressure superheated steam stored in the steam pressure balancer inner cylinder (17) and the steam pressure balancer outer cylinder (18) can be used by the quick-installed steam turbine (19) to perform external work and drive the first generator (37) or the second generator (39) to generate electricity.

5. A high-temperature and high-pressure superheated steam storage system for a thermal power generating unit according to claim 1 or 2, characterized in that: High-temperature and high-pressure superheated steam can be stored by connecting a plurality of individual steam pressure balancers (16) in parallel to form an array arrangement; High-temperature and high-pressure superheated steam passes through the inlet main pipe of the steam pressure balancer inner cylinder (17) and through respective inlet valves to enter the single-unit steam pressure balancer inner cylinder (17) for storage; high-temperature and high-pressure reheated steam passes through the inlet main pipe of the steam pressure balancer inner cylinder (17) and through respective inlet valves to enter the single-unit steam pressure balancer outer cylinder (18) for storage.

6. A high-temperature and high-pressure superheated steam storage system for a thermal power generating unit according to claim 1 or 2, characterized in that: High-temperature and high-pressure superheated steam passes through the steam pressure balancer inner cylinder (17) through respective outlet valves, enters the outlet main pipe in sequence, passes through the steam pressure balancer inner cylinder outlet valve (5), and then enters the quick-installed steam turbine (19) to perform external work, thereby driving the first generator (37) or the second generator (39) to generate electricity.

7. A high-temperature and high-pressure superheated steam storage system for a thermal power generating unit according to claim 1 or 2, characterized in that: High-temperature and high-pressure reheated steam is discharged from the steam pressure balancer outer cylinder (18), passes through the steam pressure balancer outer cylinder (18) outlet main pipe, and enters the quick-installed steam turbine (19) alone or mixed with the high-temperature and high-pressure superheated steam in the steam pressure balancer inner cylinder (17) through the steam pressure balancer inner cylinder outlet valve (5) to perform external work and drive the first generator (37) or the second generator (39) to generate electricity.

8. A high-temperature and high-pressure superheated steam storage system for a thermal power generating unit according to claim 1, characterized in that: The steam pressure balancer (16) is a double-layer cylinder structure. The inner cylinder (17) of the steam pressure balancer stores high-temperature and high-pressure superheated steam. The steam source is new steam from the boiler (15) or other steam sources. The pressure is Pn, Pn = 3MPa ~ 18MPa, and the temperature is Tn, Tn = 350°C ~ 580°C. The steam pressure balancer outer cylinder (18) stores high-temperature and high-pressure superheated steam, the steam source of which is the reheated steam of the boiler (15) or other steam sources, the pressure of which is Pw, Pw=3MPa~10MPa, and the temperature of which is Tw, Tw=350°C~580°C.

9. A high-temperature and high-pressure superheated steam storage system for a thermal power generating unit according to claim 8, characterized in that: The steam pressure balancer (16) is a double-layer cylinder structure. The inner cylinder (17) of the steam pressure balancer stores high-temperature and high-pressure superheated steam. The steam source is the new steam from the boiler (15) or other steam sources. The pressure is Pn and the temperature is Tn. The outer cylinder (18) of the steam pressure balancer stores high-temperature and high-pressure superheated steam. The steam source is the reheated steam from the boiler (15) or other steam sources. The pressure is Pw and the temperature is Tw. Among them, the pressure Pn>Pw=(1 / 2~1 / 3)Pn, and the temperature Tw=Tn.

10. A high-temperature and high-pressure superheated steam storage system for a thermal power generating unit according to claim 1 or 8, characterized in that: The steam inlet pressure of the quick-assembled steam turbine (19) is P0″=3~18MPa, T0″=350~580℃, the rated speed n≥3000~7200 rpm, and the relative internal efficiency η=89~93%.

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