Novel energy storage type dry peak cooling system

Abstract

The invention relates to the technical field of energy conservation and consumption reduction of coal-fired units, in particular to a novel energy storage type dry peak cooling system which comprises a peak condenser, a dry air cooling tower, a reservoir, a reservoir circulating pump, a cooling tower circulating pump and a DCS control center. And a corresponding instruction is made according to a comparison result after the back pressure threshold value is compared with a built-in back pressure threshold value. On the basis of the energy storage type design concept, cooling water resources are reasonably allocated and stored, the capacity requirement of the dry type air cooling tower is reduced, and the problem that the space in a plant is limited is solved; meanwhile, by adopting a mixed cooling mode of cold water of the dry-type air cooling tower and cold water of the reservoir, the temperature of the peak condenser is effectively reduced, the back pressure of the unit is further reduced, the on-load capacity of the unit is improved, and the unit can stably operate under nameplate output in the high-temperature period in summer; the problems that an original direct air cooling system is high in back pressure and limited in load in summer are solved.

Description

Technical Field

[0001] The invention relates to the technical field of energy saving and consumption reduction of coal-fired units, and in particular to a novel energy storage type dry peak cooling system. Background Art

[0002] Direct air-cooling units are widely used in my country's "Three North Regions" where there is abundant coal and insufficient water. Direct air-cooling systems are generally composed of exhaust devices, exhaust pipes, downstream radiator bundles, countercurrent radiator bundles, axial flow fans, condensate systems, vacuum systems and cleaning systems. At present, the proportion of downstream and countercurrent radiator bundles used in my country's direct air-cooling units is: for single-row tubes, the countercurrent ratio is about 20%; for double-row tubes, the countercurrent ratio is about 20% to 30%; for three-row tubes, the countercurrent ratio is about 15% to 30%; for special temperature conditions, the countercurrent ratio can vary. In recent years, most condenser bundle structures use single-row tubes.

[0003] Direct air-cooled units use air to cool the steam turbine exhaust. Compared with the conventional cooling system of the wet cooling tower, the cooling capacity of the air-cooled system is more affected by environmental factors and is more sensitive to changes in ambient temperature and natural wind. When designing direct air-cooled units, the economic relationship between the heat dissipation area of ​​the air-cooled radiator and the number of full-load hours at the local hottest temperature throughout the year must be considered. The heat exchange end difference of the air-cooled units put into production early is too large. In addition, due to the influence of factors such as the increased heat consumption of the unit itself, dirty heat dissipation surfaces, and hot air recirculation, the actual operating back pressure of the unit is far higher than the design characteristics. It is common that the steam turbine exhaust back pressure is high during the high temperature period in summer and it is not fully loaded.

[0004] Traditional peak cooling systems mostly use direct air cooling system capacity expansion or new wet peak systems. On the one hand, the capacity expansion of the direct air cooling system requires a high space in the plant, and on the other hand, the construction period is long and difficult, especially in the connection method between the new and old steel structure platforms, and the safety hazards when the old platform fan is running during the construction of the new platform. Therefore, this method is rarely used in domestic projects; the new wet peak system is currently widely used, but this method is restricted by the water resources of the power plant and is limited in the application of power plants with high water consumption requirements.

[0005] Therefore, there is an urgent need to develop a peak cooling system to solve the problem of difficulty in increasing the capacity of air cooling systems in power plants in water-scarce areas and with limited space within the plant. Summary of the invention

[0006] In view of the above-mentioned deficiencies in the prior art, the present invention provides a novel energy storage dry peak cooling system to solve the problem of difficulty in increasing the capacity of air cooling systems in power plants in water-scarce areas and with limited space within the plant.

[0007] The present invention is based on the design concept of energy storage. By rationally allocating and storing cooling water resources, the capacity requirement of the dry air cooling tower is greatly reduced, solving the problem of limited space in the factory. At the same time, by adopting a mixed cooling method of cold water from the dry air cooling tower and cold water from the reservoir, the temperature of the peak condenser is effectively reduced, thereby reducing the back pressure of the unit, improving the load-carrying capacity of the unit, and enabling the unit to operate stably under the nameplate output during the high temperature period in summer, thus achieving efficient management of the direct air cooling system and solving the problems of high back pressure and load limit in summer of the original direct air cooling system. In addition, the present invention also realizes the requirements of different working modes by setting two working modes and flexibly switching the cooling mode under different working conditions, thus meeting the dual goals of efficient system operation and environmental protection and energy saving.

[0008] The present invention provides a novel energy storage dry peak cooling system, comprising: a peak condenser, a dry air cooling tower, a water reservoir, a water reservoir circulating pump, a cooling tower circulating pump and a DCS control center, wherein the peak condenser is connected to an exhaust pipe, the peak condenser, the dry air cooling tower and the water reservoir are connected through a pipe, and the DCS control center is electrically connected to the peak condenser, the dry air cooling tower, the water reservoir circulating pump and the cooling tower circulating pump; A first valve and a second valve are provided at the connection between the peak condenser and the pipeline, a third valve and a fourth valve are provided at the connection between the dry air cooling tower and the pipeline, a fifth valve, a sixth valve and a seventh valve are provided at the connection between the water storage tank and the pipeline, and the pipeline includes a first pipeline, a second pipeline, a third pipeline, a fourth pipeline and a fifth pipeline; The water storage tank circulation pump is arranged on the first pipeline on one side of the fifth valve, and the eighth valve and the ninth valve are arranged at both ends of the water storage tank circulation pump; the cooling tower circulation pump is arranged on the third pipeline, and the tenth valve is arranged at both ends of the cooling tower circulation pump; The DCS control center receives the exhaust pressure data of the steam turbine monitored by the pressure sensor, that is, the back pressure data, in real time, and compares it with the built-in back pressure threshold. If the back pressure data received by the DCS control center is ≥ the built-in back pressure threshold, the DCS control center operates in the high back pressure working mode, otherwise the DCS control center operates in the low back pressure working mode. The high back pressure working mode is that the cold water of the dry air cooling tower is mixed with the cold water of the water reservoir, and then the temperature is increased by heat exchange with the exhaust steam from the exhaust pipe in the peak condenser, and then the heated hot water is returned to the dry air cooling tower and the water reservoir, and the cycle is repeated to improve the heat exchange capacity of the direct air cooling system; the low back pressure working mode is that the peak condenser is shut down, the cold water of the dry air cooling tower is transported to the water reservoir, the hot water in the water reservoir is cooled, and the hot water in the water reservoir is circulated back to the dry air cooling tower, and the cycle is repeated to cool the hot water in the water reservoir.

[0009] Preferably, the peak condenser is connected to the water reservoir via the first valve, the first pipeline, and the fifth valve, and the dry air cooling tower is connected to the water reservoir via the fourth valve, the fourth pipeline, and the sixth valve.

[0010] Preferably, the peak condenser is connected to the fourth pipeline via the second valve and the fifth pipeline, and the dry air cooling tower is connected to the first pipeline via the third valve and the third pipeline.

[0011] Preferably, both ends of the second pipeline are connected to the first pipeline, and the seventh valve is arranged on the second pipeline.

[0012] Preferably, one end of the second pipeline is communicated with the first pipeline on one side of the fifth valve, and the other end of the second pipeline is communicated with the first pipeline on one side of the eighth valve.

[0013] Preferably, the DCS control center is electrically connected to the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve, the eighth valve, the ninth valve and the tenth valve.

[0014] Preferably, the DCS control center is also used for the staff to set the water delivery of the peak condenser, dry air cooling tower and water storage tank according to actual needs, and to adjust the corresponding valve opening based on the water delivery set by the staff.

[0015] Preferably, the high back pressure working mode is specifically as follows: the DCS control center controls the seventh valve to close, and the other valves to open. At the same time, the DCS control center also controls the water reservoir circulation pump and the cooling tower circulation pump to start working. The cold water of the water reservoir is transported to the peak condenser through the first pipeline under the boosting effect of the water reservoir circulation pump. At the same time, the cold water of the dry air cooling tower is also transported to the first pipeline through the third pipeline under the boosting effect of the cooling tower circulation pump. After being mixed with the cold water from the water reservoir in the first pipeline, they are transported to the peak condenser together. The peak condenser heats up with the exhaust steam from the exhaust pipe through heat exchange, and then enters the fourth pipeline through the fifth pipeline and is divided into two paths. One path flows back to the dry air cooling tower through the fourth valve, and the other path flows back to the water reservoir through the sixth valve. This cycle is repeated to improve the heat exchange capacity of the direct air cooling system. The low back pressure working mode is specifically as follows: the DCS control center controls the peak condenser, the first valve, the second valve, the water reservoir circulation pump, the eighth valve and the ninth valve to be closed, and other valves to be opened. At the same time, the DCS control center also controls the cooling tower circulation pump to start working. The cold water of the dry air cooling tower is transported to the first pipeline through the third pipeline under the pressure increase effect of the cooling tower circulation pump. When the peak condenser, the first valve and the second valve are closed, the cold water is transported to the water reservoir through the first pipeline, the seventh valve and the fifth valve. Subsequently, the hot water in the water reservoir is circulated back to the dry air cooling tower through the sixth valve, the fourth pipeline and the fourth valve. In this cycle, the hot water in the water reservoir is cooled.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention adopts an energy storage design concept. By rationally allocating and storing cooling water resources, it not only greatly reduces the capacity demand of the dry air cooling tower, solves the problem of limited space in the factory, but also reduces dependence on land resources.

[0017] 2. The present invention adopts a mixed cooling method of cold water from a dry air-cooling tower and cold water from a water reservoir, which effectively reduces the temperature of the peak condenser, thereby reducing the back pressure of the unit and improving the load-carrying capacity of the unit, so that the unit can operate stably under the nameplate output during high temperature periods in summer, thereby achieving efficient management of the direct air cooling system and solving the problems of high back pressure and load limit in summer in the original direct air cooling system; in addition, the mixed cooling method recycles the cold water in the water reservoir, does not require additional water resource consumption, and meets the requirements of water conservation and environmental protection.

[0018] 3. The present invention realizes the requirements of different working modes by flexibly switching the cooling mode, and meets the dual goals of efficient operation of the system and environmental protection and energy saving.

[0019] 4. The present invention significantly reduces the cost of transformation investment and land use scale, bringing significant economic benefits to the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A structural diagram of a novel energy storage dry peak cooling system in an embodiment of the present invention; Figure 2 This is a flow chart of the operation of the high back pressure working mode in an embodiment of the present invention; Figure 3 This is a flow chart of the operation of the low back pressure working mode in an embodiment of the present invention. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] like Figure 1 As shown, the present invention provides a novel energy storage dry peak cooling system, comprising: a peak condenser 1, a dry air cooling tower 2, a water reservoir 3, a water reservoir circulating pump 4, a cooling tower circulating pump 5 and a DCS control center, wherein the peak condenser 1 is connected to the exhaust pipe, the peak condenser 1, the dry air cooling tower 2 and the water reservoir 3 are connected through a pipe, and the DCS control center is electrically connected to the peak condenser 1, the dry air cooling tower 2, the water reservoir circulating pump 4, and the cooling tower circulating pump 5.

[0025] In the present application, a first valve 11 and a second valve 12 are provided at the connection between the peak condenser 1 and the pipeline, a third valve 21 and a fourth valve 22 are provided at the connection between the dry air cooling tower 2 and the pipeline, and a fifth valve 31, a sixth valve 32 and a seventh valve 33 are provided at the connection between the water reservoir 3 and the pipeline.

[0026] The pipelines involved in the embodiment of the present application include a first pipeline 6 , a second pipeline 7 , a third pipeline 8 , a fourth pipeline 9 and a fifth pipeline 10 .

[0027] In the embodiment of the present application, the peak condenser 1 is connected to the water reservoir 3 via the first valve 11 , the first pipeline 6 , and the fifth valve 31 , and the peak condenser 1 is connected to the fourth pipeline 9 via the second valve 12 , the fifth pipeline 10 .

[0028] In the embodiment of the present application, the water reservoir circulation pump 4 is arranged on the first pipeline 6 on one side of the fifth valve 31 , and an eighth valve 41 and a ninth valve 42 are provided at both ends of the water reservoir circulation pump 4 .

[0029] In the embodiment of the present application, both ends of the second pipeline 7 are connected to the first pipeline 6 , and the seventh valve 33 is disposed on the second pipeline 7 .

[0030] Preferably, one end of the second pipeline 7 is communicated with the first pipeline 6 on one side of the fifth valve 31 , and the other end is communicated with the first pipeline 6 on one side of the eighth valve 41 .

[0031] In the embodiment of the present application, the dry air cooling tower 2 is connected to the first pipeline 6 via the third valve 21 and the third pipeline 8, and the dry air cooling tower 2 is connected to the water reservoir 3 via the fourth valve 22, the fourth pipeline 9 and the sixth valve 32.

[0032] In the embodiment of the present application, the cooling tower circulation pump 5 is arranged on the third pipeline 8, and a tenth valve 51 is provided at both ends of the cooling tower circulation pump 5.

[0033] In the embodiment of the present application, the DCS control center is electrically connected to the first valve 11 , the second valve 12 , the third valve 21 , the fourth valve 22 , the fifth valve 31 , the sixth valve 32 , the seventh valve 33 , the eighth valve 41 , the ninth valve 42 and the tenth valve 51 .

[0034] In the present application, the DCS control center receives exhaust pressure data of the steam turbine monitored by the pressure sensor, i.e., back pressure data, in real time, and compares it with the built-in back pressure threshold. If the back pressure data received by the DCS control center is ≥ the built-in back pressure threshold, the DCS control center operates in a high back pressure working mode, otherwise the DCS control center operates in a low back pressure working mode, wherein the high back pressure working mode is that the cold water of the dry air cooling tower 2 is mixed with the cold water of the water reservoir 3, and then the temperature is increased by heat exchange with the exhaust steam from the exhaust pipe in the peak condenser 1, and then the heated hot water is returned to the dry air cooling tower 2 and the water reservoir 3, and the cycle is repeated to improve the heat exchange capacity of the direct air cooling system; the low back pressure working mode is that the peak condenser 1 is shut down, the cold water of the dry air cooling tower 2 is transported to the water reservoir 3, the hot water in the water reservoir 3 is cooled, and the hot water in the water reservoir 3 is circulated back to the dry air cooling tower 2, and the cycle is repeated to achieve cooling of the hot water in the water reservoir 3.

[0035] When the system is running at high load, the application adopts a mixed cooling method of cold water from a dry air cooling tower and cold water from a water reservoir, which effectively reduces the temperature of the peak condenser and ensures the stable operation of the system. When the system load is low, the application stops the peak condenser from running and only uses a dry air cooling tower to cool the hot water in the water reservoir, further improving the energy efficiency and flexibility of the system.

[0036] It needs to be explained that the pressure sensor is arranged on the exhaust pipe to obtain the measured value of the back pressure, which is a conventional setting in this field, so this application will not explain it in detail.

[0037] like Figure 1 , 2 As shown, in the embodiment of the present application, the high back pressure working mode is specifically: The DCS control center controls the seventh valve 33 to close and other valves to open. At the same time, the DCS control center also controls the water reservoir circulation pump 4 and the cooling tower circulation pump 5 to start working. The cold water of the water reservoir 3 is transported to the peak condenser 1 through the first pipeline 6 under the boosting effect of the water reservoir circulation pump 4. At the same time, the cold water of the dry air cooling tower 2 is also transported to the first pipeline 6 through the third pipeline 8 under the boosting effect of the cooling tower circulation pump 5. After being mixed with the cold water from the water reservoir 3 in the first pipeline 6, they are transported to the peak condenser 1 together. The peak condenser 1 exchanges heat with the exhaust steam from the exhaust pipe to increase the temperature, and then enters the fourth pipeline 9 through the fifth pipeline 10 and is divided into two paths. One path flows back to the dry air cooling tower 2 through the fourth valve 22, and the other path flows back to the water reservoir 3 through the sixth valve 32. This cycle is repeated to improve the heat exchange capacity of the direct air cooling system.

[0038] like Figure 1 , 3 As shown, in the embodiment of the present application, the low back pressure working mode is specifically: The DCS control center controls the peak condenser 1, the first valve 11, the second valve 12, the water reservoir circulation pump 4, the eighth valve 41 and the ninth valve 42 to be closed, and other valves to be opened. At the same time, the DCS control center also controls the cooling tower circulation pump 5 to start working. The cold water of the dry air cooling tower 2 is transported to the first pipeline 6 through the third pipeline 8 under the boosting effect of the cooling tower circulation pump 5. When the peak condenser 1, the first valve 11 and the second valve 12 are closed, the cold water is transported to the water reservoir 3 through the first pipeline 6, the seventh valve 33 and the fifth valve 31. Subsequently, the hot water of the water reservoir 3 circulates back to the dry air cooling tower 2 through the sixth valve 32, the fourth pipeline 9 and the fourth valve 22. In this cycle, the hot water in the water reservoir 3 is cooled.

[0039] Preferably, the DCS control center is also used for the staff to set the water delivery of the peak condenser 1, the dry air cooling tower 2 and the water reservoir 3 according to actual needs, and to adjust the corresponding valve openings based on the water delivery set by the staff.

[0040] It should be noted that the water delivery of the peak condenser 1, the dry air cooling tower 2 and the water reservoir 3 is set according to the actual situation; in addition, after the DCS receives the expected water delivery set by the staff, it will calculate the opening degree of each valve through its built-in algorithm or control strategy, and send the corresponding control signal to each valve. After receiving the signal, each valve will make corresponding adjustments to the opening degree. This is a conventional function of DCS in industrial automation and is not specifically limited in this application.

[0041] Embodiment 1

[0042] High back pressure working mode: the water reservoir 3 delivers 50°C water to the peak condenser 1 through the first pipeline 6 at a speed of 3000 t / h under the boosting effect of the water reservoir circulation pump 4. At the same time, the dry air cooling tower 2 also delivers 40°C water to the first pipeline 6 through the third pipeline 8 at a speed of 3000 t / h under the boosting effect of the cooling tower circulation pump 5. After the two are mixed in the first pipeline 6, they begin to deliver 45°C water to the peak condenser 1 at a speed of 6000 t / h. After the peak condenser 1 is heated by heat exchange with the exhaust steam from the exhaust pipe, 60°C water is formed. Then, it enters the fourth pipeline 9 through the fifth pipeline 10 and is divided into two paths. One path returns the 60°C water to the dry air cooling tower 2 through the fourth valve 22, and the other path returns the 60°C water to the water reservoir 3 through the sixth valve 32. This cycle is repeated to improve the heat exchange capacity of the direct air cooling system.

[0043] Low back pressure working mode: The cold water of the dry air cooling tower 2 is pressurized by the cooling tower circulation pump 5 at a speed of 3000t / h to transport 40°C water to the water reservoir 3 through the third pipe 8, the first pipe 6, the seventh valve 33 and the fifth valve 31. Then the water reservoir 3 circulates the 60°C water in the pool back to the dry air cooling tower 2 through the sixth valve 32, the fourth pipe 9 and the fourth valve 22. This cycle is repeated to cool the hot water in the water reservoir 3.

[0044] Embodiment 2

[0045] High back pressure working mode: the water reservoir 3 delivers 40°C water to the peak condenser 1 through the first pipeline 6 at a speed of 4000 t / h under the boosting effect of the water reservoir circulation pump 4. At the same time, the dry air cooling tower 2 also delivers 55°C water to the first pipeline 6 through the third pipeline 8 at a speed of 4000 t / h under the boosting effect of the cooling tower circulation pump 5. After the two are mixed in the first pipeline 6, they begin to deliver 47.5°C water to the peak condenser 1 at a speed of 8000 t / h. After the peak condenser 1 and the exhaust steam from the exhaust pipe are heated by heat exchange, 65°C water is formed. Then, it enters the fourth pipeline 9 through the fifth pipeline 10 and is divided into two paths. One path returns the 65°C water to the dry air cooling tower 2 through the fourth valve 22, and the other path returns the 65°C water to the water reservoir 3 through the sixth valve 32. This cycle is repeated to improve the heat exchange capacity of the direct air cooling system.

[0046] Low back pressure working mode: The cold water of the dry air cooling tower 2 is conveyed to the water reservoir 3 at a speed of 4000 t / h through the third pipe 8, the first pipe 6, the seventh valve 33 and the fifth valve 31 under the boosting action of the cooling tower circulation pump 5. Then the water reservoir 3 circulates the 65°C water in the pool back to the dry air cooling tower 2 through the sixth valve 32, the fourth pipe 9 and the fourth valve 22. The cycle is repeated in this way to cool the hot water in the water reservoir 3.

[0047] Embodiment 3

[0048] High back pressure working mode: the water reservoir 3 delivers 40°C water to the peak condenser 1 through the first pipeline 6 at a speed of 5000 t / h under the boosting effect of the water reservoir circulation pump 4. At the same time, the dry air cooling tower 2 also delivers 60°C water to the first pipeline 6 through the third pipeline 8 at a speed of 5000 t / h under the boosting effect of the cooling tower circulation pump 5. After the two are mixed in the first pipeline 6, they begin to deliver 50°C water to the peak condenser 1 at a speed of 10000 t / h. After the peak condenser 1 is heated by heat exchange with the exhaust steam from the exhaust pipe, 70°C water is formed. Then, it enters the fourth pipeline 9 through the fifth pipeline 10 and is divided into two paths. One path returns the 70°C water to the dry air cooling tower 2 through the fourth valve 22, and the other path returns the 70°C water to the water reservoir 3 through the sixth valve 32. This cycle is repeated to improve the heat exchange capacity of the direct air cooling system.

[0049] Low back pressure working mode: The cold water of the dry air cooling tower 2 is pressurized by the cooling tower circulation pump 5 at a speed of 5000t / h to transport 40°C water to the water reservoir 3 through the third pipe 8, the first pipe 6, the seventh valve 33 and the fifth valve 31. Then the water reservoir 3 circulates the 70°C water in the pool back to the dry air cooling tower 2 through the sixth valve 32, the fourth pipe 9 and the fourth valve 22. This cycle is repeated to cool the hot water in the water reservoir 3.

[0050] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. 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 new energy storage dry peak cooling system, characterized in that: include: Peak condenser, dry air cooling tower, water reservoir, water reservoir circulation pump, cooling tower circulation pump and DCS control center, wherein the peak condenser is connected to the exhaust pipe, the peak condenser, dry air cooling tower and water reservoir are connected through pipelines, and the DCS control center is electrically connected to the peak condenser, dry air cooling tower, water reservoir circulation pump and cooling tower circulation pump; A first valve and a second valve are provided at the connection between the peak condenser and the pipeline, a third valve and a fourth valve are provided at the connection between the dry air cooling tower and the pipeline, a fifth valve, a sixth valve and a seventh valve are provided at the connection between the water storage tank and the pipeline, and the pipeline includes a first pipeline, a second pipeline, a third pipeline, a fourth pipeline and a fifth pipeline; The water storage tank circulation pump is arranged on the first pipeline on one side of the fifth valve, and the eighth valve and the ninth valve are arranged at both ends of the water storage tank circulation pump; the cooling tower circulation pump is arranged on the third pipeline, and the tenth valve is arranged at both ends of the cooling tower circulation pump; The DCS control center receives the exhaust pressure data of the steam turbine monitored by the pressure sensor, that is, the back pressure data, in real time, and compares it with the built-in back pressure threshold. If the back pressure data received by the DCS control center is ≥ the built-in back pressure threshold, the DCS control center operates in the high back pressure working mode, otherwise the DCS control center operates in the low back pressure working mode. The high back pressure working mode is that the cold water of the dry air cooling tower is mixed with the cold water of the water reservoir, and then the temperature is increased by heat exchange with the exhaust steam from the exhaust pipe in the peak condenser, and then the heated hot water is returned to the dry air cooling tower and the water reservoir, and the cycle is repeated to improve the heat exchange capacity of the direct air cooling system; the low back pressure working mode is that the peak condenser is shut down, the cold water of the dry air cooling tower is transported to the water reservoir, the hot water in the water reservoir is cooled, and the hot water in the water reservoir is circulated back to the dry air cooling tower, and the cycle is repeated to cool the hot water in the water reservoir.

2. A novel energy storage dry peak cooling system according to claim 1, characterized in that: The peak condenser is connected to the water reservoir via the first valve, the first pipeline and the fifth valve, and the dry air cooling tower is connected to the water reservoir via the fourth valve, the fourth pipeline and the sixth valve.

3. A novel energy storage dry peak cooling system according to claim 2, characterized in that: The peak condenser is connected to the fourth pipeline via the second valve and the fifth pipeline, and the dry air cooling tower is connected to the first pipeline via the third valve and the third pipeline.

4. A novel energy storage dry peak cooling system according to claim 3, characterized in that: Both ends of the second pipeline are communicated with the first pipeline, and the seventh valve is arranged on the second pipeline.

5. A novel energy storage dry peak cooling system according to claim 4, characterized in that: One end of the second pipeline is communicated with the first pipeline on one side of the fifth valve, and the other end of the second pipeline is communicated with the first pipeline on one side of the eighth valve.

6. A novel energy storage dry peak cooling system according to claim 5, characterized in that: The DCS control center is electrically connected to the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve, the eighth valve, the ninth valve and the tenth valve.

7. A novel energy storage dry peak cooling system according to claim 6, characterized in that: The DCS control center is also used by the staff to set the water delivery volume of the peak condenser, dry air cooling tower and water storage tank according to actual needs, and to adjust the corresponding valve opening based on the water delivery volume set by the staff.

8. A novel energy storage dry peak cooling system according to claim 7, characterized in that: The high back pressure working mode is specifically as follows: the DCS control center controls the seventh valve to close, and the other valves to open. At the same time, the DCS control center also controls the water storage tank circulation pump and the cooling tower circulation pump to start working. The cold water of the water storage tank is transported to the peak condenser through the first pipeline under the boosting effect of the water storage tank circulation pump. At the same time, the cold water of the dry air cooling tower is also transported to the first pipeline through the third pipeline under the boosting effect of the cooling tower circulation pump. After being mixed with the cold water from the water storage tank in the first pipeline, they are transported to the peak condenser together. The peak condenser heats up with the exhaust steam from the exhaust pipe through heat exchange, and then enters the fourth pipeline through the fifth pipeline and is divided into two paths. One path flows back to the dry air cooling tower through the fourth valve, and the other path flows back to the water storage tank through the sixth valve. This cycle is repeated to improve the heat exchange capacity of the direct air cooling system. The low back pressure working mode is specifically as follows: the DCS control center controls the peak condenser, the first valve, the second valve, the water reservoir circulation pump, the eighth valve and the ninth valve to be closed, and other valves to be opened. At the same time, the DCS control center also controls the cooling tower circulation pump to start working. The cold water of the dry air cooling tower is transported to the first pipeline through the third pipeline under the pressure increase effect of the cooling tower circulation pump. When the peak condenser, the first valve and the second valve are closed, the cold water is transported to the water reservoir through the first pipeline, the seventh valve and the fifth valve. Subsequently, the hot water in the water reservoir is circulated back to the dry air cooling tower through the sixth valve, the fourth pipeline and the fourth valve. In this cycle, the hot water in the water reservoir is cooled.

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