阅读说明：本技术 海上风电间冷再热式换热器及运行方法 (Cold reheating type heat exchanger of offshore wind power station and operation method ) 是由 韩万龙 姚明宇 于在松 顾建威 谢羽 蒋世希 于 2019-11-14 设计创作，主要内容包括：本发明公开了一种海上风电间冷再热式换热器及工作方法,该换热器包括换热器外壳、一次间冷/二次间冷/一次再热/二次再热子换热器、换热器入口/出口管路、各子换热器液态工质进出口管路及进口阀门、各子换热器空气进出口管路,可按电网需求将系统中高低压空压机产生的热能通过热交换存储在系统中,或将系统中存储的热能通过热交换转化为气体内能推动高低压空气透平做功而转化为电能,其中四套独立并联的子换热器可实现高低压空气压缩机的间冷过程和高低压空气透平的再热过程,子储热器管路流程短,间冷过程和再热过程液态工质流动压力损失少,两过程不同时进行且管路间无热量交换,可使海上风电间冷再热式换热器内的换热更加高效、节能。(The invention discloses an offshore wind power intercooling reheating heat exchanger and a working method thereof, the heat exchanger comprises a heat exchanger shell, a primary intercooling/secondary intercooling/primary reheating/secondary reheating sub heat exchanger, a heat exchanger inlet/outlet pipeline, liquid working medium inlet/outlet pipelines and inlet valves of the sub heat exchangers, and air inlet/outlet pipelines of the sub heat exchangers, the heat energy generated by a high-low pressure air compressor in a system can be stored in the system through heat exchange according to the requirement of a power grid, or the heat energy stored in the system is converted into gas internal energy through heat exchange to drive a high-low pressure air turbine to do work and converted into electric energy, wherein four sets of independent parallel sub heat exchangers can realize the intercooling process of the high-low pressure air compressor and the reheating process of the high-low pressure air turbine, the pipeline flow of the sub heat accumulator is short, the liquid working medium flow pressure loss in the intercooling, the two processes are not carried out simultaneously, and no heat exchange exists between pipelines, so that the heat exchange in the cold reheating type heat exchanger of the offshore wind power plant room is more efficient and energy-saving.)

1. Cold reheat formula heat exchanger between offshore wind power, its characterized in that: the heat exchanger comprises a heat exchanger shell (1), a primary indirect cooling sub-heat exchanger (3), a secondary indirect cooling sub-heat exchanger (4), a primary reheating sub-heat exchanger (5), a secondary reheating sub-heat exchanger (6), a heat exchanger inlet pipeline (7), a primary indirect cooling inlet pipeline (8), a secondary indirect cooling inlet pipeline (9), a primary reheating inlet pipeline (10), a secondary reheating inlet pipeline (11), a primary indirect cooling inlet valve (45), a secondary indirect cooling inlet valve (12), a primary reheating inlet valve (13), a secondary reheating inlet valve (14), a primary indirect cooling outlet pipeline (15), a secondary indirect cooling outlet pipeline (16), a primary reheating outlet pipeline (17), a secondary reheating outlet pipeline (18), a primary indirect cooling air inlet pipeline (19), a secondary indirect cooling air inlet pipeline (20), a primary reheating air inlet pipeline (21), a secondary reheating air inlet pipeline (22), A primary indirect cooling air outlet pipeline (23), a secondary indirect cooling air outlet pipeline (24), a primary reheating air outlet pipeline (25), a secondary reheating air outlet pipeline (26) and a heat exchanger outlet pipeline (27), wherein the primary indirect cooling heat exchanger (3) is respectively connected with the outflow end of the primary indirect cooling inlet pipeline (8), the inflow end of the primary indirect cooling outlet pipeline (15), the outflow end of the primary indirect cooling air inlet pipeline (19) and the inflow end of the primary indirect cooling air outlet pipeline (23), the secondary indirect cooling heat exchanger (4) is respectively connected with the outflow end of the secondary indirect cooling inlet pipeline (9), the inflow end of the secondary indirect cooling outlet pipeline (16), the outflow end of the secondary indirect cooling air inlet pipeline (20) and the inflow end of the secondary indirect cooling air outlet pipeline (24), and the primary reheating sub-heat exchanger (5) is respectively connected with the outflow end of the primary reheating inlet pipeline (10), the outflow end of the secondary reheating inlet pipeline (26), the inflow end of the secondary indirect cooling air outlet pipeline (26) and the, The inflow end of a primary reheating outlet pipeline (17), the outflow end of a primary reheating air inlet pipeline (21) and the inflow end of a primary reheating air outlet pipeline (25) are connected, a secondary reheating sub-heat exchanger (6) is respectively connected with the outflow end of a secondary reheating inlet pipeline (11), the inflow end of a secondary reheating outlet pipeline (18), the outflow end of a secondary reheating air inlet pipeline (22) and the inflow end of a secondary reheating air outlet pipeline (26), a primary intercooling inlet valve (45), a secondary intercooling inlet valve (12), a primary reheating inlet valve (13) and a secondary reheating inlet valve (14) are respectively positioned on the primary intercooling inlet pipeline (8), the secondary intercooling inlet pipeline (9), the primary reheating inlet pipeline (10) and the secondary reheating inlet pipeline (11), the inflow end of a heat exchanger inlet pipeline (7) is connected with the outflow end of a heat reservoir outlet pipeline (28), the outflow end of a heat exchanger inlet pipeline (7) is connected with the inflow ends of a primary intermediate cold inlet pipeline (8), a secondary intermediate cold inlet pipeline (9), a primary reheating inlet pipeline (10) and a secondary reheating inlet pipeline (11), the outflow end of a heat exchanger outlet pipeline (27) is connected with the inflow end of a heat reservoir inlet pipeline (29), the inflow end of the heat exchanger outlet pipeline (27) is connected with the inflow ends of a primary intermediate cold outlet pipeline (15), a secondary intermediate cold outlet pipeline (16), a primary reheating outlet pipeline (17) and a secondary reheating outlet pipeline (18), the inflow end of a heat reservoir outlet pipeline (28) and the outflow end of a heat reservoir inlet pipeline (29) are connected with a heat reservoir (46), a low-pressure air compressor (30) is connected with the inflow end of a primary intermediate cold air inlet pipeline (19) through a low-pressure air compressor outlet pipeline (35), and a high-pressure air compressor (31) is connected with a primary intermediate cold air outlet pipeline (23) through a high-pressure air compressor inlet pipeline (36) The high-pressure air compressor (31) is connected with the inflow end of a secondary intermediate cold air inlet pipeline (20) through a high-pressure air compressor outlet pipeline (37), the underwater air bag (34) is connected with the outflow end of a secondary intermediate cold air outlet pipeline (24) through an air storage inflow pipeline (42), the underwater air bag (34) is connected with the inflow end of a primary reheat air inlet pipeline (21) through an air storage outflow pipeline (41), the high-pressure air turbine (32) is connected with the outflow end of a primary reheat air outlet pipeline (25) through a high-pressure turbine inflow pipeline (38), the high-pressure air turbine (32) is connected with the inflow end of a secondary reheat air inlet pipeline (22) through a high-pressure turbine outflow pipeline (39), and the low-pressure air turbine (33) is connected with the outflow end of a secondary reheat air outlet pipeline (26) through a low-pressure turbine inflow pipeline (40).

2. The offshore wind power plant cold reheat heat exchanger of claim 1, wherein: on heat exchanger shell (1) all was fixed in heat-retaining energy storage station platform (2) with heat reservoir (46), high-pressure air turbine (32), low pressure air turbine (33), high-pressure air compressor machine (31) and low pressure air compressor machine (30), gasbag (34) were located and are less than 500 to 1000 meters deep position below heat-retaining energy storage station platform (2), and heat-retaining energy storage station platform (2) are connected with the booster station of offshore wind power generation unit through submarine cable.

3. The offshore wind power plant cold reheat heat exchanger of claim 1, wherein: the primary indirect cooling heat exchanger (3), the secondary indirect cooling heat exchanger (4), the primary reheating heat exchanger (5) and the secondary reheating heat exchanger (6) are all shell-and-tube heat exchangers or micro-channel heat exchangers.

4. The offshore wind power plant cold reheat heat exchanger of claim 1, wherein: the heat exchanger comprises a heat exchanger shell (1), a primary indirect cooling sub-heat exchanger (3), a secondary indirect cooling sub-heat exchanger (4), a primary reheating sub-heat exchanger (5), a secondary reheating sub-heat exchanger (6), a heat exchanger inlet pipeline (7), a primary indirect cooling inlet pipeline (8), a secondary indirect cooling inlet pipeline (9), a primary reheating inlet pipeline (10), a secondary reheating inlet pipeline (11), a primary indirect cooling inlet valve (45), a secondary indirect cooling inlet valve (12), a primary reheating inlet valve (13), a secondary reheating inlet valve (14), a primary indirect cooling outlet pipeline (15), a secondary indirect cooling outlet pipeline (16), a primary reheating outlet pipeline (17), a secondary reheating outlet pipeline (18), a primary indirect cooling air inlet pipeline (19), a secondary indirect cooling air inlet pipeline (20), a primary reheating air inlet pipeline (21), a secondary reheating air inlet pipeline (22), And heat preservation layers are arranged outside the primary indirect cooling air outlet pipeline (23), the secondary indirect cooling air outlet pipeline (24), the primary reheating air outlet pipeline (25), the secondary reheating air outlet pipeline (26) and the heat exchanger outlet pipeline (27).

5. Method of operating an offshore wind power plant cold reheat heat exchanger as set forth in any of claims 1 to 4, characterized in that: the operation method of the offshore wind power inter-cooling reheating type heat exchanger comprises three stages, namely a maintaining stage, an inter-cooling stage and a reheating stage, the maintaining stage is that when the output power of the offshore wind power generation set in the indirect air heat storage and energy storage offshore wind power generation system is within the adjustable range of the power grid, the offshore wind power generation set directly supplies power to the power grid through the booster station, the offshore wind power inter-cooling reheating heat exchanger does not participate in the work of the indirect cooling type air heat storage energy storage offshore wind power generation system, at the moment, a primary indirect cooling inlet valve (45), a secondary indirect cooling inlet valve (12), a primary reheating inlet valve (13) and a secondary reheating inlet valve (14) in the offshore wind power indirect cooling-reheating heat exchanger are in a closed state, and a gas storage inflow valve (44) on a gas storage inflow pipeline (42) and a gas storage outflow valve (43) on a gas storage outflow pipeline (41) are in a closed state; the indirect cooling stage is that when the output power of an offshore wind power generation set in the indirect cooling type air heat storage and energy storage offshore wind power generation system is larger than the adjustable range of a power grid, a control system on a heat storage and energy storage station platform (2) sends a command to open a primary indirect cooling inlet valve (45), a secondary indirect cooling inlet valve (12) and an air storage inflow valve (44), and close a primary reheating inlet valve (13), a secondary reheating inlet valve (14) and an air storage outflow valve (43), the heat storage and energy storage station platform (2) supplies power to a low-pressure air compressor (30) and a high-pressure air compressor (31), the low-pressure air compressor (30) and the high-pressure air compressor (31) convert electric energy into compressed air potential energy and gas internal energy, air enters a primary indirect cooling heat exchanger (3) after being compressed for the first time by the low-pressure air compressor (30) to exchange heat with a, the heated liquid working medium is stored in a hot tank of the heat reservoir (46), the cooled air is compressed again by a high-pressure air compressor (31) and enters a secondary intercooler heat exchanger (4) to exchange heat with the liquid working medium flowing out of the cold tank in the heat reservoir (46), the heated liquid working medium is stored in the hot tank of the heat reservoir (46), and the cooled high-pressure air is stored in an underwater air bag (34); the reheating stage is that when the output power of an offshore wind power generation unit in the indirect air heat storage and energy storage offshore wind power generation system is smaller than the adjustable range of a power grid, a control system on a heat storage and energy storage station platform (2) sends instructions to open a primary reheating inlet valve (13), a secondary reheating inlet valve (14) and an air storage outflow valve (43), a primary indirect cooling inlet valve (45), a secondary indirect cooling inlet valve (12) and an air storage inflow valve (44) are closed, when high-pressure air stored in an underwater air bag (34) passes through a primary reheating sub-heat exchanger (5), the high-pressure air and high-temperature liquid working media flowing out of a heat tank in a heat storage device (46) are subjected to heat exchange to promote the internal energy of the high-pressure air, the cooled liquid working media are stored in a cold tank of the heat storage device (46), then the high-pressure air with the raised temperature pushes a high-pressure air turbine (32, and then the part of gas enters the secondary reheating sub heat exchanger (6) again to exchange heat with high-temperature liquid working medium flowing out of a hot tank in the heat reservoir (46) to increase the internal energy of the gas again, the liquid working medium after temperature reduction is stored in a cold tank of the heat reservoir (46), the part of gas with the temperature increased again flows out of the secondary reheating sub heat exchanger (6) to push the low-pressure air turbine (33) to do work and then is discharged into the atmosphere, the pressure potential energy and the internal energy of the remaining available part of gas are converted into electric energy, and the electric energy generated by the high-pressure air turbine (32) and the low-pressure air turbine (33) is transmitted to an offshore booster station or a power grid through a submarine cable connected with the heat storage energy storage station platform (.

Technical Field

The invention relates to the crossing field of offshore wind power generation and air heat storage and energy storage technologies, in particular to an offshore wind power inter-cooling reheating type heat exchanger applied to an indirect cooling type air heat storage and energy storage offshore wind power generation system and an operation method.

Background

Offshore wind energy has the advantages of large total reserve, long available hours and close distance to energy consumption, and similar to land wind energy utilization, offshore wind power also has the problem that the output power of an offshore wind power plant is not matched with the requirement of a power grid, and the impact of the offshore wind power on the power grid floats more greatly. By solving the problem, some researchers propose to combine offshore wind power with compressed air, heat storage technology and compressed air energy technology stored underwater, construct an indirect air heat storage energy storage offshore wind power generation system with higher energy conversion efficiency and less land space occupation, and can effectively stabilize the power output of an offshore wind power generation unit so as to better match the requirements of offshore wind power and a power grid. However, the above system scheme does not mention the specific structure and detailed technical characteristics of the heat exchanger with reheating and indirect cooling functions in the system, and if a heat exchange technology and an operation method applied to the above system can be developed in a targeted manner, the offshore wind turbine generator and the heat storage and energy storage system can be promoted to better realize self power regulation, the regional power grid is more friendly, and the offshore wind energy can be better utilized by human beings.

Disclosure of Invention

The invention aims to solve the problems and provide an offshore wind power intercooling and reheating heat exchanger and an operation method thereof, which can complete an intercooling process of a high-pressure air compressor and a low-pressure air compressor and a reheating process of a high-pressure air turbine.

The invention realizes the purpose through the following technical scheme:

the offshore wind power indirect heat-type heat exchanger comprises a heat exchanger shell 1, a primary indirect heat exchanger 3, a secondary indirect heat exchanger 4, a primary indirect heat exchanger 5, a secondary indirect heat exchanger 6, a heat exchanger inlet pipeline 7, a primary indirect cold inlet pipeline 8, a secondary indirect cold inlet pipeline 9, a primary reheating inlet pipeline 10, a secondary reheating inlet pipeline 11, a primary indirect cold inlet valve 45, a secondary indirect cold inlet valve 12, a primary reheating inlet valve 13, a secondary reheating inlet valve 14, a primary indirect cold outlet pipeline 15, a secondary indirect cold outlet pipeline 16, a primary reheating outlet pipeline 17, a secondary reheating outlet pipeline 18, a primary indirect cold air inlet pipeline 19, a secondary indirect cold air inlet pipeline 20, a primary reheating air inlet pipeline 21, a secondary reheating air inlet pipeline 22, a primary indirect cold air outlet pipeline 23, a secondary indirect cold air outlet pipeline 24, A primary reheat air outlet line 25, a secondary reheat air outlet line 26 and a heat exchanger outlet line 27, wherein the primary intercooling sub-heat exchanger 3 is respectively connected with the outflow end of the primary intercooling inlet line 8, the inflow end of the primary intercooling outlet line 15, the outflow end of the primary intercooling air inlet line 19 and the inflow end of the primary intercooling air outlet line 23, the secondary intercooling sub-heat exchanger 4 is respectively connected with the outflow end of the secondary intercooling inlet line 9, the inflow end of the secondary intercooling outlet line 16, the outflow end of the secondary intercooling air inlet line 20 and the inflow end of the secondary intercooling air outlet line 24, the primary reheat sub-heat exchanger 5 is respectively connected with the outflow end of the primary reheat inlet line 10, the inflow end of the primary reheat outlet line 17, the outflow end of the primary reheat air inlet line 21 and the inflow end of the primary reheat air outlet line 25, the secondary reheat sub-heat exchanger 6 is respectively connected with the outflow end of the secondary reheat inlet line 11, the outflow end of the secondary reheat, The inflow end of the secondary reheat outlet pipeline 18, the outflow end of the secondary reheat air inlet pipeline 22 and the inflow end of the secondary reheat air outlet pipeline 26 are connected, the inflow end of the primary intercooling inlet valve 45, the secondary intercooling inlet valve 12, the primary reheat inlet valve 13 and the secondary reheat inlet valve 14 are respectively positioned on the primary intercooling inlet pipeline 8, the secondary intercooling inlet pipeline 9, the primary reheat inlet pipeline 10 and the secondary reheat inlet pipeline 11, the inflow end of the heat exchanger inlet pipeline 7 is connected with the outflow end of the heat reservoir outlet pipeline 28, the outflow end of the heat exchanger inlet pipeline 7 is connected with the inflow ends of the primary intercooling inlet pipeline 8, the secondary intercooling inlet pipeline 9, the primary reheat inlet pipeline 10 and the secondary reheat inlet pipeline 11, the outflow end of the heat exchanger outlet pipeline 27 is connected with the inflow end of the heat reservoir inlet pipeline 29, the inflow end of the heat exchanger outlet pipeline 27 is connected with the primary intercooling outlet pipeline 15, the inflow end of the, The secondary cold outlet pipeline 16, the primary reheat outlet pipeline 17 and the secondary reheat outlet pipeline 18 are connected at the outflow ends thereof, the inflow end of the heat reservoir outlet pipeline 28 and the outflow end of the heat reservoir inlet pipeline 29 are connected with the heat reservoir 46, the low pressure air compressor 30 is connected with the inflow end of the primary cold air inlet pipeline 19 through the low pressure air compressor outlet pipeline 35, the high pressure air compressor 31 is connected with the outflow end of the primary cold air outlet pipeline 23 through the high pressure air compressor inlet pipeline 36, the high pressure air compressor 31 is connected with the inflow end of the secondary cold air inlet pipeline 20 through the high pressure air compressor outlet pipeline 37, the underwater air bag 34 is connected with the outflow end of the secondary cold air outlet pipeline 24 through the air storage inflow pipeline 42, the underwater air bag 34 is connected with the inflow end of the primary reheat air inlet pipeline 21 through the air storage outflow pipeline 41, the high pressure air turbine 32 is connected with the outflow end of the primary reheat air outlet pipeline 25 through the high pressure turbine inflow pipeline 38, the high pressure air turbine 32 is connected to the inlet end of the secondary reheat air inlet line 22 by a high pressure turbine outlet line 39, and the low pressure air turbine 33 is connected to the outlet end of the secondary reheat air outlet line 26 by a low pressure turbine inlet line 40.

The heat exchanger shell 1 and the heat reservoir 46, the high-pressure air turbine 32, the low-pressure air turbine 33, the high-pressure air compressor 31 and the low-pressure air compressor 30 are all fixed on the heat storage energy storage station platform 2, the underwater air bag 34 is located at a position which is 500-1000 meters deep below the heat storage energy storage station platform 2, and the heat storage energy storage station platform 2 is connected with a booster station of an offshore wind power generation unit through a submarine cable.

The primary intercooler heat exchanger 3, the secondary intercooler heat exchanger 4, the primary reheat sub heat exchanger 5 and the secondary reheat sub heat exchanger 6 are all shell-and-tube heat exchangers or micro-channel heat exchangers.

The heat exchanger shell 1, the primary indirect cooling heat exchanger 3, the secondary indirect cooling heat exchanger 4, the primary reheating heat exchanger 5, the secondary reheating heat exchanger 6, the heat exchanger inlet pipeline 7, the primary indirect cooling inlet pipeline 8, the secondary indirect cooling inlet pipeline 9, the primary reheating inlet pipeline 10, the secondary reheating inlet pipeline 11, the primary indirect cooling inlet valve 45, the secondary indirect cooling inlet valve 12, the primary reheating inlet valve 13, the secondary reheating inlet valve 14, the primary indirect cooling outlet pipeline 15, the secondary indirect cooling outlet pipeline 16, the primary reheating outlet pipeline 17, the secondary reheating outlet pipeline 18, the primary indirect cooling air inlet pipeline 19, the secondary indirect cooling air inlet pipeline 20, the primary reheating air inlet pipeline 21, the secondary reheating air inlet pipeline 22, the primary indirect cooling air outlet pipeline 23, the secondary indirect cooling air outlet pipeline 24, the primary reheating air outlet pipeline 25, And heat insulation layers are arranged outside the secondary reheat air outlet pipeline 26 and the heat exchanger outlet pipeline 27.

The operation method of the offshore wind power inter-cooling and reheating heat exchanger mainly comprises three stages, namely a holding stage, an inter-cooling stage and a reheating stage, wherein the holding stage is that when the output power of an offshore wind power generation unit in an inter-cooling type air heat storage and energy storage offshore wind power generation system is within an adjustable range of a power grid, the offshore wind power generation unit directly supplies power to the power grid through a booster station, the offshore wind power inter-cooling and reheating heat exchanger does not participate in the work of the inter-cooling type air heat storage and energy storage offshore wind power generation system, namely, a primary inter-cooling inlet valve 45, a secondary inter-reheating inlet valve 12, a primary reheating inlet valve 13 and a secondary reheating inlet valve 14 in the offshore wind power inter-cooling and reheating heat exchanger are in a closed state, and a gas storage inflow valve 44 on a gas storage inflow pipeline 42 and a gas storage outflow valve 43 on; the indirect cooling stage is that when the output power of an offshore wind power generation set in the indirect cooling type air heat storage and energy storage offshore wind power generation system is larger than the adjustable range of a power grid, a control system on a platform 2 of a heat storage and energy storage station sends out an instruction to open a primary indirect cooling inlet valve 45, a secondary indirect cooling inlet valve 12 and an air storage inflow valve 44, and close a primary reheating inlet valve 13, a secondary reheating inlet valve 14 and an air storage outflow valve 43, the platform 2 of the heat storage and energy storage station supplies power to a low-pressure air compressor 30 and a high-pressure air compressor 31, the low-pressure air compressor 30 and the high-pressure air compressor 31 convert electric energy into compressed air potential energy and gas internal energy, air enters a primary indirect cooling heat exchanger 3 to exchange heat with a liquid working medium flowing out of a cold tank of a heat reservoir 46 after being compressed for the first time by the low-pressure air compressor 30, the liquid working, the heat exchange is carried out between the secondary indirect cooling heat exchanger 4 and the liquid working medium flowing out of the cold tank in the heat reservoir 46, the liquid working medium after temperature rise is stored in the hot tank of the heat reservoir 46, and the high-pressure air after temperature reduction is stored in the underwater air bag 34; the reheating stage is that when the output power of an offshore wind power generation set in the indirect air heat storage and energy storage offshore wind power generation system is smaller than the adjustable range of a power grid, a control system on the heat storage and energy storage station platform 2 sends a command to open a primary reheating inlet valve 13, a secondary reheating inlet valve 14 and an air storage outflow valve 43, close a primary reheating inlet valve 45, a secondary reheating inlet valve 12 and an air storage inflow valve 44, when high-pressure air stored in the underwater air bag 34 passes through the primary reheating sub-heat exchanger 5, the high-pressure air exchanges heat with high-temperature liquid working media flowing out of a hot tank in the heat reservoir 46 to lift internal energy of the high-pressure air, the liquid working media after temperature reduction are stored in a cold tank of the heat reservoir 46, then the high-pressure air with the increased temperature pushes the high-pressure air turbine 32 to do work, pressure potential energy and internal energy of a part of the air are converted into electric energy, and then the part of the gas enters The internal energy of the gas is increased, the cooled liquid working medium is stored in a cold tank of the heat reservoir 46, the part of gas with the temperature increased again flows out of the secondary reheating sub-heat exchanger 6 to push the low-pressure air turbine 33 to do work and then is discharged into the atmosphere, the pressure potential energy and the internal energy of the rest available part of gas are converted into electric energy, and the electric energy generated by the high-pressure air turbine 32 and the low-pressure air turbine 33 is transmitted to an offshore booster station or a power grid through a submarine cable connected with the heat storage energy storage station platform 2.

The invention has the beneficial effects that:

at present, a mature technical scheme of a heat exchanger with indirect cooling and reheating functions, which can be used for an indirect air heat storage and energy storage offshore wind power generation system, is not seen. The invention provides complete technical characteristics and an operation scheme of an offshore wind power inter-cooling and reheating heat exchanger, which can realize that heat energy generated by a high-low pressure air compressor in a system is stored in the system after heat exchange, and the heat energy stored in the system is converted into internal gas energy to push a high-low pressure air turbine to do work and release the internal gas energy through heat exchange. The invention can promote the offshore wind power generator set and the heat storage and energy storage system to realize self power regulation more efficiently, and is beneficial to leading the offshore wind power to be better utilized by human beings.

Drawings

FIG. 1 is a schematic diagram of an offshore wind farm cold reheat heat exchanger of the present invention.

Detailed Description

The invention will be further described with reference to the accompanying drawings in which:

as shown in figure 1, the offshore wind power indirect heat exchanger comprises a heat exchanger shell 1, a primary indirect heat exchanger 3, a secondary indirect heat exchanger 4, a primary reheating sub heat exchanger 5, a secondary reheating sub heat exchanger 6, a heat exchanger inlet pipeline 7, a primary indirect cold inlet pipeline 8, a secondary indirect cold inlet pipeline 9, a primary reheating inlet pipeline 10, a secondary reheating inlet pipeline 11, a primary indirect cold inlet valve 45, a secondary indirect cold inlet valve 12, a primary reheating inlet valve 13, a secondary reheating inlet valve 14, a primary indirect cold outlet pipeline 15, a secondary indirect cold outlet pipeline 16, a primary reheating outlet pipeline 17, a secondary reheating outlet pipeline 18, a primary indirect cold air inlet pipeline 19, a secondary indirect cold air inlet pipeline 20, a primary reheating air inlet pipeline 21, a secondary reheating air inlet pipeline 22, a primary indirect cold air outlet pipeline 23, a secondary indirect cold air outlet pipeline 24, A primary reheat air outlet line 25, a secondary reheat air outlet line 26 and a heat exchanger outlet line 27, wherein the primary intercooling sub-heat exchanger 3 is respectively connected with the outflow end of the primary intercooling inlet line 8, the inflow end of the primary intercooling outlet line 15, the outflow end of the primary intercooling air inlet line 19 and the inflow end of the primary intercooling air outlet line 23, the secondary intercooling sub-heat exchanger 4 is respectively connected with the outflow end of the secondary intercooling inlet line 9, the inflow end of the secondary intercooling outlet line 16, the outflow end of the secondary intercooling air inlet line 20 and the inflow end of the secondary intercooling air outlet line 24, the primary reheat sub-heat exchanger 5 is respectively connected with the outflow end of the primary reheat inlet line 10, the inflow end of the primary reheat outlet line 17, the outflow end of the primary reheat air inlet line 21 and the inflow end of the primary reheat air outlet line 25, the secondary reheat sub-heat exchanger 6 is respectively connected with the outflow end of the secondary reheat inlet line 11, the outflow end of the secondary reheat, The inflow end of the secondary reheat outlet pipeline 18, the outflow end of the secondary reheat air inlet pipeline 22 and the inflow end of the secondary reheat air outlet pipeline 26 are connected, the inflow end of the primary intercooling inlet valve 45, the secondary intercooling inlet valve 12, the primary reheat inlet valve 13 and the secondary reheat inlet valve 14 are respectively positioned on the primary intercooling inlet pipeline 8, the secondary intercooling inlet pipeline 9, the primary reheat inlet pipeline 10 and the secondary reheat inlet pipeline 11, the inflow end of the heat exchanger inlet pipeline 7 is connected with the outflow end of the heat reservoir outlet pipeline 28, the outflow end of the heat exchanger inlet pipeline 7 is connected with the inflow ends of the primary intercooling inlet pipeline 8, the secondary intercooling inlet pipeline 9, the primary reheat inlet pipeline 10 and the secondary reheat inlet pipeline 11, the outflow end of the heat exchanger outlet pipeline 27 is connected with the inflow end of the heat reservoir inlet pipeline 29, the inflow end of the heat exchanger outlet pipeline 27 is connected with the primary intercooling outlet pipeline 15, the inflow end of the, The secondary cold outlet pipeline 16, the primary reheat outlet pipeline 17 and the secondary reheat outlet pipeline 18 are connected at the outflow ends thereof, the inflow end of the heat reservoir outlet pipeline 28 and the outflow end of the heat reservoir inlet pipeline 29 are connected with the heat reservoir 46, the low pressure air compressor 30 is connected with the inflow end of the primary cold air inlet pipeline 19 through the low pressure air compressor outlet pipeline 35, the high pressure air compressor 31 is connected with the outflow end of the primary cold air outlet pipeline 23 through the high pressure air compressor inlet pipeline 36, the high pressure air compressor 31 is connected with the inflow end of the secondary cold air inlet pipeline 20 through the high pressure air compressor outlet pipeline 37, the underwater air bag 34 is connected with the outflow end of the secondary cold air outlet pipeline 24 through the air storage inflow pipeline 42, the underwater air bag 34 is connected with the inflow end of the primary reheat air inlet pipeline 21 through the air storage outflow pipeline 41, the high pressure air turbine 32 is connected with the outflow end of the primary reheat air outlet pipeline 25 through the high pressure turbine inflow pipeline 38, the high pressure air turbine 32 is connected to the inlet end of the secondary reheat air inlet line 22 by a high pressure turbine outlet line 39, and the low pressure air turbine 33 is connected to the outlet end of the secondary reheat air outlet line 26 by a low pressure turbine inlet line 40.

As a preferred embodiment of the present invention, the heat exchanger housing 1, the heat reservoir 46, the high-pressure air turbine 32, the low-pressure air turbine 33, the high-pressure air compressor 31 and the low-pressure air compressor 30 are all fixed on the heat storage and energy storage station platform 2, the underwater air bag 34 is located at a position 500 to 1000 meters below the heat storage and energy storage station platform 2, and the heat storage and energy storage station platform 2 is connected with the booster station of the offshore wind power generation unit through a submarine cable.

As a preferred embodiment of the present invention, the primary intercooler heat exchanger 3, the secondary intercooler heat exchanger 4, the primary reheat sub heat exchanger 5, and the secondary reheat sub heat exchanger 6 are all shell-and-tube heat exchangers or microchannel heat exchangers, and have the advantages of high heat transfer coefficient, high structural strength, convenient installation, and long service life.

As a preferred embodiment of the present invention, the heat exchanger case 1, the primary intercooler heat exchanger 3, the secondary intercooler heat exchanger 4, the primary reheat heat exchanger 5, the secondary reheat heat exchanger 6, the heat exchanger inlet line 7, the primary intercooler inlet line 8, the secondary intercooler inlet line 9, the primary reheat inlet line 10, the secondary reheat inlet line 11, the primary intercooler inlet valve 45, the secondary intercooler inlet valve 12, the primary reheat inlet valve 13, the secondary reheat inlet valve 14, the primary intercooler outlet line 15, the secondary intercooler outlet line 16, the primary reheat outlet line 17, the secondary reheat outlet line 18, the primary intercooler air inlet line 19, the secondary intercooler air inlet line 20, the primary reheat air inlet line 21, the secondary reheat air inlet line 22, the primary intercooler air outlet line 23, the secondary intercooler air outlet line 24, the secondary intercooler air inlet line 19, the secondary intercooler air inlet line 20, the secondary reheat inlet line 21, the secondary reheat outlet line, The heat preservation layers are arranged outside the primary reheat air outlet pipeline 25, the secondary reheat air outlet pipeline 26 and the heat exchanger outlet pipeline 27, so that heat transfer among internal parts of the heat exchanger and heat transfer between the heat exchanger and the outside can be reduced to the maximum extent.

As shown in fig. 1, the operation method of the offshore wind power inter-cooling and reheating heat exchanger mainly comprises three stages, namely a holding stage, an inter-cooling stage and a reheating stage, the maintaining stage is that when the output power of the offshore wind power generation set in the indirect air heat storage and energy storage offshore wind power generation system is within the adjustable range of the power grid, the offshore wind power generation set directly supplies power to the power grid through the booster station, the offshore wind power inter-cooling reheating heat exchanger does not participate in the work of the indirect cooling type air heat storage energy storage offshore wind power generation system, namely, at this time, the primary intermediate cold inlet valve 45, the secondary intermediate cold inlet valve 12, the primary reheat inlet valve 13 and the secondary reheat inlet valve 14 in the offshore wind power intermediate cold-reheat type heat exchanger are in a closed state, and the gas storage inflow valve 44 on the gas storage inflow pipeline 42 and the gas storage outflow valve 43 on the gas storage outflow pipeline 41 are in a closed state; the indirect cooling stage is that when the output power of an offshore wind power generation set in the indirect cooling type air heat storage and energy storage offshore wind power generation system is larger than the adjustable range of a power grid, a control system on a platform 2 of a heat storage and energy storage station sends out an instruction to open a primary indirect cooling inlet valve 45, a secondary indirect cooling inlet valve 12 and an air storage inflow valve 44, and close a primary reheating inlet valve 13, a secondary reheating inlet valve 14 and an air storage outflow valve 43, the platform 2 of the heat storage and energy storage station supplies power to a low-pressure air compressor 30 and a high-pressure air compressor 31, the low-pressure air compressor 30 and the high-pressure air compressor 31 convert electric energy into compressed air potential energy and gas internal energy, air enters a primary indirect cooling heat exchanger 3 to exchange heat with a liquid working medium flowing out of a cold tank of a heat reservoir 46 after being compressed for the first time by the low-pressure air compressor 30, the liquid working, the heat exchange is carried out between the secondary indirect cooling heat exchanger 4 and the liquid working medium flowing out of the cold tank in the heat reservoir 46, the liquid working medium after temperature rise is stored in the hot tank of the heat reservoir 46, and the high-pressure air after temperature reduction is stored in the underwater air bag 34; the reheating stage is that when the output power of an offshore wind power generation set in the indirect air heat storage and energy storage offshore wind power generation system is smaller than the adjustable range of a power grid, a control system on the heat storage and energy storage station platform 2 sends a command to open a primary reheating inlet valve 13, a secondary reheating inlet valve 14 and an air storage outflow valve 43, close a primary reheating inlet valve 45, a secondary reheating inlet valve 12 and an air storage inflow valve 44, when high-pressure air stored in the underwater air bag 34 passes through the primary reheating sub-heat exchanger 5, the high-pressure air exchanges heat with high-temperature liquid working media flowing out of a hot tank in the heat reservoir 46 to lift internal energy of the high-pressure air, the liquid working media after temperature reduction are stored in a cold tank of the heat reservoir 46, then the high-pressure air with the increased temperature pushes the high-pressure air turbine 32 to do work, pressure potential energy and internal energy of a part of the air are converted into electric energy, and then the part of the gas enters The internal energy of the gas is increased, the cooled liquid working medium is stored in a cold tank of the heat reservoir 46, the part of gas with the temperature increased again flows out of the secondary reheating sub-heat exchanger 6 to push the low-pressure air turbine 33 to do work and then is discharged into the atmosphere, the pressure potential energy and the internal energy of the rest available part of gas are converted into electric energy, and the electric energy generated by the high-pressure air turbine 32 and the low-pressure air turbine 33 is transmitted to an offshore booster station or a power grid through a submarine cable connected with the heat storage energy storage station platform 2.