A control system for heat storage and heat exchange device of fluctuating steam

Abstract

The present invention relates to a control system for a heat storage and heat exchange device for fluctuating steam, which is used to control the heat storage and heat exchange device for fluctuating steam and includes an input unit, a processor, and an output unit; the input unit is connected in parallel to the input end of the processor, and the output unit is connected in parallel to the output end of the processor; the input unit includes a temperature measurement unit, a pressure measurement unit, a flow measurement unit, and a liquid level measurement unit; and the output unit includes a relief valve, a steam regulating valve, a connecting valve, a drain valve, and a water pump. The present invention is used to control discontinuous fluctuating steam waste heat recovery equipment, and can achieve fully automated operation of the equipment, accurately control the circulating water flow, increase temperature difference control and average temperature control, improve the equipment's heat storage and heat exchange efficiency, ensure equipment operation safety, and take into account the equipment's economy, energy saving, and high efficiency.

Description

Technical Field

[0001] The present invention relates to a control system, in particular to a control system for a heat storage and heat exchange device of fluctuating steam. Background Art

[0002] The steel industry generates a large amount of waste heat during production. Currently, medium- and high-grade waste heat has been fully utilized, while the utilization rate of low-temperature waste heat resources is low. For example, the large amount of discontinuous fluctuating steam generated during the pressurized hot slag treatment process cannot be integrated into the plant's low-pressure steam network due to its low temperature and impurities. Furthermore, the intermittent and corrosive nature of this hot steam makes its recovery difficult, and currently it can only be discharged into the air. This not only pollutes the environment but also results in a significant waste of water and thermal energy resources.

[0003] The present invention is based on a fluctuating steam heat storage and heat exchange device, which is used to recover discontinuously fluctuating dirty steam and provides a control system to solve the problem of its fully automated, safe and efficient operation. Summary of the Invention

[0004] The present invention provides a control system for a fluctuating steam heat storage and heat exchange device, which includes heat storage tower liquid level control, heat storage tower pressure control, upper circulation flow control, lower circulation flow control, average temperature control, and heat exchanger outlet water temperature control, to solve the problem of how to fully automatically, safely and efficiently operate the fluctuating steam heat storage and heat exchange equipment.

[0005] The present invention adopts the following technical solutions:

[0006] Provided is a control system for a heat storage and heat exchange device for fluctuating steam, which is used to control the heat storage and heat exchange device for fluctuating steam, and includes an input unit, a processor, and an output unit; the input unit is connected to the input end of the processor, and the output unit is connected to the output end of the processor;

[0007] The input unit includes a temperature measuring unit, a pressure measuring unit, a flow measuring unit, and a liquid level measuring unit; the output unit includes a relief valve, a steam regulating valve, a connecting valve, a drain valve, and a water pump.

[0008] Preferably, the processor includes an operation module, a control module, an input port, and an output port; the signal measured by the input unit is transmitted from the input port to the operation module, and is transmitted to the control module after operation processing, and the control module sends the instruction from the output port to the output unit for execution.

[0009] Preferably, the heat storage and heat exchange device of the wave steam includes a heat storage tower, a heat exchanger, and a spray device, wherein the spray device is arranged at the upper part of the heat storage tower, and the heat exchanger is arranged at the lower part of the heat storage tower;

[0010] The bottom of the heat storage tower is connected to the spray device through the second upper pipe section via the second upper circulation inlet and is connected to the middle of the heat storage tower through the second lower pipe section via the lower circulation inlet through the second lifting pipeline;

[0011] A steam inlet is provided in the middle of the heat storage tower, and a steam pipe is connected to the steam inlet;

[0012] The heat exchanger is a liquid heat exchanger, comprising a heat exchanger inlet pipe at the bottom and a heat exchanger outlet pipe at the top.

[0013] Preferably, the temperature measuring unit includes a first temperature measuring unit provided at the upper part of the heat storage tower, a second temperature measuring unit provided at the middle part, and a third temperature measuring unit provided at the lower part, a fourth temperature measuring unit provided at the inlet pipe of the heat exchanger, a fifth temperature measuring unit provided at the outlet pipe of the heat exchanger, and a seventh temperature measuring unit provided at the second lifting pipeline;

[0014] The pressure measuring unit and the relief valve are arranged at the top of the heat storage tower; the liquid level measuring unit is arranged in the middle of the heat storage tower;

[0015] The flow measurement unit includes a fourth flow measurement unit provided on the steam pipe, a third flow measurement unit provided on the outlet pipe of the heat exchanger, and a second flow measurement unit provided on the second lifting pipe;

[0016] The steam regulating valve is arranged on the steam pipeline;

[0017] The connecting valve includes a second connecting valve for connecting the second lifting pipeline, the second upper pipe section, and the second lower pipe section;

[0018] The drain valve is arranged at the lower part of the second lifting pipeline;

[0019] The water pump includes a third water pump arranged on the heat exchanger inlet pipe and a second water pump arranged on the second lifting pipeline.

[0020] Preferably, the heat storage and heat exchange device for fluctuating steam further comprises a first lifting pipeline, which is connected to the spray device via the first upper circulation inlet by the first upper pipe section and is connected to the middle of the heat storage tower via the first lower circulation inlet by the first lower pipe section.

[0021] Preferably, the connecting valve further comprises a first connecting valve connecting the first lifting pipeline, the first upper pipe section and the first lower pipe section;

[0022] The water pump further includes a first water pump provided in a first lifting pipeline; the flow measurement unit further includes a first flow measurement unit provided in the first lifting pipeline; and the temperature measurement unit further includes a sixth temperature measurement unit provided in the first lifting pipeline.

[0023] Preferably, the control of the control system includes,

[0024] Heat storage tower pressure control: The pressure measurement unit transmits the measured pressure signal to the processor, which controls the opening of the relief valve, the first connecting valve, the second connecting valve, the frequency of the first water pump, and the start and stop of the second water pump;

[0025] Heat storage tower liquid level control: The liquid level measurement unit transmits the measured liquid level signal to the processor, which controls the opening of the drain valve and steam regulating valve and the start and stop of the second water pump;

[0026] Upper circulation flow control: The fourth flow measurement unit transmits the measured steam flow signal to the processor, which controls the frequency of the first water pump, the start and stop of the second water pump, and the opening of the first connecting valve and the second connecting valve;

[0027] Lower circulation flow control: The temperature signals measured by the second temperature measuring unit and the third temperature measuring unit are transmitted to the processor, and the processor controls the frequency of the first water pump, the start and stop of the second water pump, and the opening of the first connecting valve and the second connecting valve;

[0028] Average temperature control: The temperature signals measured by the second temperature measuring unit and the third temperature measuring unit are transmitted to the processor, which controls the opening of the drain valve and the start and stop of the second water pump;

[0029] Heat exchanger outlet water temperature control: The temperature signal measured by the fifth temperature measurement unit is transmitted to the processor, and the processor controls the start and stop of the third water pump;

[0030] The first water pump is a variable frequency pump, and the second and third water pumps are fixed frequency pumps.

[0031] Preferably, the processor includes an operation module, a control module, an input port, and an output port; in the lower circulation flow control, the temperature signals measured by the second temperature measuring unit and the third temperature measuring unit are transmitted to the operation module of the processor to calculate the difference and transmit the difference to the control module, and the control module transmits the instruction to the output port to control the opening of the sewage valve and the start and stop of the second water pump.

[0032] Preferably, the processor includes an operation module, a control module, an input port, and an output port; during average temperature control, the temperature signals measured by the second temperature measuring unit and the third temperature measuring unit are transmitted to the operation module of the processor to calculate the average and transmit the average to the control module, and the control module transmits the instruction to the output port to control the opening of the sewage valve and the start and stop of the second water pump.

[0033] Preferably, the first connecting valve, the second connecting valve and the drain valve are all three-way valves; and the three-way valves are all electric valves.

[0034] The control system provided by the present invention specifically includes:

[0035] Heat storage tower pressure control: The heat storage tower top pressure measurement unit, relief valve, first connecting valve, second connecting valve, first water pump and second water pump work together to ensure that the heat storage tower operates within a certain safe pressure range. When the pressure exceeds the system safety threshold, the system will shut down to ensure equipment safety.

[0036] Thermal storage tower liquid level control: The liquid level measurement unit, drain valve, steam regulating valve, and second water pump on the thermal storage tower work together to achieve liquid level control in the thermal storage tower. This design not only regularly removes dirt from the bottom of the thermal storage tower, but also keeps the liquid level in the thermal storage tower within a reasonable range.

[0037] Upstream Circulation Flow Control: Based on the steam flow rate measured by the fourth flow measurement unit at the steam inlet, the frequency of the variable frequency water pumps (the first water pump) and the start and stop of the second water pump are controlled. This control coordinates the opening and closing of the upstream channels of the first and second connecting valves to precisely control the upstream circulation flow rate. This control adjusts the flow rate of the circulating water in the heat storage tower according to the steam flow rate, achieving precise control of the upstream circulation flow rate.

[0038] Lower circulation flow control: The temperature difference is the difference between the temperatures measured by the second temperature measurement unit in the middle of the heat storage tower and the third temperature measurement unit at the bottom. The frequency of the first water pump and the start and stop of the second water pump are controlled according to the temperature difference, and the opening and closing of the downstream channels of the first and second connecting valves are coordinated to control the flow of the lower circulation loop;

[0039] Average temperature control: The average temperature is the average of the temperatures measured by the second temperature measurement unit in the middle of the heat storage tower and the third temperature measurement unit at the bottom. The change in the average temperature is used to control the start and stop of the drain valve and the second water pump, accurately controlling the liquid level and ensuring the storage temperature of the hot water.

[0040] Heat exchanger outlet water temperature control: Control the start and stop of the third water pump according to the temperature measured by the fifth temperature measurement unit at the heat exchanger outlet pipe.

[0041] The present invention has the following technical effects:

[0042] This invention provides a control system for a fluctuating steam heat storage and exchange system, including control of the heat storage tower liquid level, heat storage tower pressure, upper and lower circulation flow rates, average temperature, and heat exchanger outlet water temperature, enabling fully automatic and safe operation of the equipment. The design of two circulating water pumps, one fixed-frequency and one variable-frequency, achieves precise control of the circulating water flow while also ensuring economical and energy-efficient operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is a schematic diagram of the installation structure of the wave steam heat storage and heat exchange device and control system of the present invention;

[0044] Figure 2Schematic diagram of the control system connection relationship of the fluctuating steam heat storage and heat exchange device of the present invention. DETAILED DESCRIPTION

[0045] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be understood as limiting the present invention.

[0046] refer to Figure 1 、 2 The present invention provides a control system for a heat storage and heat exchange device of a fluctuating steam, which is used to control the heat storage and heat exchange device of the fluctuating steam, and includes an input unit, a processor, and an output unit; the input unit is connected to the input end of the processor, and the output unit is connected to the output end of the processor;

[0047] The input unit includes a temperature measuring unit, a pressure measuring unit 11, a flow measuring unit, and a liquid level measuring unit 13; the output unit includes a relief valve 6, a steam regulating valve 7, a connecting valve, a drain valve 16, and a water pump.

[0048] Furthermore, the processor includes an operation module, a control module, an input port, and an output port; the signal measured by the input unit is transmitted from the input port to the operation module, and after operation processing, is transmitted to the control module, and the control module sends the instruction from the output port to the output unit for execution.

[0049] Furthermore, the heat storage and heat exchange device of the fluctuating steam includes a heat storage tower 1, a heat exchanger 102, and a spray device 103, wherein the spray device 103 is arranged at the upper part of the heat storage tower 1, and the heat exchanger 102 is arranged at the lower part of the heat storage tower 1;

[0050] The bottom of the heat storage tower 1 is connected to the spray device 103 through the second upper pipe section via the second upper circulation inlet 14-2, and is connected to the middle part of the heat storage tower 1 through the second lower pipe section via the lower circulation inlet 15-2.

[0051] A steam inlet is provided in the middle of the heat storage tower 1, and a steam pipe 2 is connected to the steam inlet;

[0052] The heat exchanger 102 is a liquid heat exchanger, including a heat exchanger inlet pipe 4 at the bottom and a heat exchanger outlet pipe 5 at the top.

[0053] Furthermore, the temperature measuring unit includes a first temperature measuring unit 10-1 provided at the upper part of the heat storage tower 1, a second temperature measuring unit 10-2 in the middle part, and a third temperature measuring unit 10-3 at the lower part, a fourth temperature measuring unit 10-4 provided on the heat exchanger inlet pipe 4, a fifth temperature measuring unit 10-5 provided on the heat exchanger outlet pipe 5, and a seventh temperature measuring unit 10-7 provided on the second rising pipeline;

[0054] The pressure measuring unit 11 and the relief valve 6 are arranged at the top of the heat storage tower 1; the liquid level measuring unit 13 is arranged in the middle of the heat storage tower 1;

[0055] The flow measurement unit includes a fourth flow measurement unit 12-4 provided on the steam pipe 2, a third flow measurement unit 12-3 provided on the heat exchanger outlet pipe 5, and a second flow measurement unit 12-2 provided on the second lifting pipeline;

[0056] The steam regulating valve 7 is arranged on the steam pipe 2;

[0057] The connecting valve includes a second connecting valve 8-2 for connecting the second lifting pipeline, the second upper pipe section, and the second lower pipe section;

[0058] The drain valve 16 is arranged at the lower part of the second lifting pipeline;

[0059] The water pump includes a third water pump 9-3 provided on the heat exchanger inlet pipe 4 and a second water pump 9-2 provided on the second lifting pipeline.

[0060] Furthermore, the heat storage and heat exchange device for fluctuating steam also includes a first lifting pipeline, which is connected to the spray device 103 through the first upper circulation inlet 14-1 by the first upper pipe section and is connected to the middle of the heat storage tower 1 through the first lower circulation inlet 15-1 by the first lower pipe section.

[0061] Furthermore, the connecting valve further comprises a first connecting valve 8-1 connecting the first lifting pipeline, the first upper pipe section and the first lower pipe section;

[0062] The water pump further includes a first water pump 9-1 provided in a first lifting pipeline; the flow measurement unit further includes a first flow measurement unit 12-1 provided in the first lifting pipeline; and the temperature measurement unit further includes a sixth temperature measurement unit 10-6 provided in the first lifting pipeline.

[0063] Furthermore, the control of the control system includes:

[0064] Heat storage tower pressure control: The pressure measurement unit transmits the measured pressure signal to the processor, which controls the opening of the relief valve 6, the first connecting valve 8-1, the second connecting valve 8-2, the frequency of the first water pump 9-1, and the start and stop of the second water pump 9-2;

[0065] Heat storage tower liquid level control: The liquid level measurement unit 13 transmits the measured liquid level signal to the processor, which controls the opening of the drain valve 16 and the steam regulating valve 7 and the start and stop of the second water pump 9-2;

[0066] Up-circulation flow control: The fourth flow measurement unit 12-4 transmits the measured steam flow signal to the processor, which controls the frequency of the first water pump 9-1, the start and stop of the second water pump 9-2, and the opening of the first connecting valve 8-1 and the second connecting valve 8-2;

[0067] Lower circulation flow control: The temperature signals measured by the second temperature measuring unit 10-2 and the third temperature measuring unit 10-3 are transmitted to the processor, and the processor controls the frequency of the first water pump 9-1, the start and stop of the second water pump 9-2, and the opening of the first connecting valve 8-1 and the second connecting valve 8-2;

[0068] Average temperature control: The temperature signals measured by the second temperature measuring unit 10-2 and the third temperature measuring unit 10-3 are transmitted to the processor, which controls the opening of the drain valve 16 and the start and stop of the second water pump 9-2;

[0069] Heat exchanger outlet water temperature control: The temperature signal measured by the fifth temperature measurement unit 10-5 is transmitted to the processor, and the processor controls the start and stop of the third water pump 9-3;

[0070] The first water pump 9 - 1 is a variable frequency pump, and the second water pump 9 - 2 and the third water pump 9 - 3 are fixed frequency pumps.

[0071] Furthermore, the processor includes an operation module, a control module, an input port, and an output port; in the lower circulation flow control, the temperature signals measured by the second temperature measuring unit 10-2 and the third temperature measuring unit 10-3 are transmitted to the operation module of the processor to calculate the difference and transmit the difference to the control module, and the control module transmits the instruction to the output port to control the opening of the sewage valve 16 and the start and stop of the second water pump 9-2.

[0072] Furthermore, the processor includes an operation module, a control module, an input port, and an output port; during average temperature control, the temperature signals measured by the second temperature measuring unit 10-2 and the third temperature measuring unit 10-3 are transmitted to the operation module of the processor to calculate the average and transmit the average to the control module, and the control module transmits the instruction to the output port to control the opening of the sewage valve 16 and the start and stop of the second water pump 9-2.

[0073] The control system provided by the present invention specifically includes:

[0074] Heat storage tower pressure control: The pressure measurement unit at the top of the heat storage tower 1, the relief valve 6, the first connecting valve 8-1, the second connecting valve 8-2, the first water pump 9-1 and the second water pump 9-2 work together to ensure that the heat storage tower 1 operates within a certain safe pressure range. When the pressure exceeds the system safety threshold, the system will shut down to ensure equipment safety.

[0075] Liquid level control in the heat storage tower: The liquid level measurement unit 13, drain valve 16, steam regulating valve 7, and second water pump 9-2 on the heat storage tower 1 work together to achieve liquid level control in the heat storage tower. This design not only regularly removes dirt from the bottom of the heat storage tower 1, but also keeps the liquid level in the heat storage tower within a reasonable range.

[0076] Upstream Circulation Flow Control: Based on the steam flow rate measured by the fourth flow measurement unit 12-4 at the steam inlet, the frequency of the variable-frequency water pumps (first water pump 9-1) and the start and stop of the second water pump 9-2 are controlled. This control coordinates the opening and closing of the upstream passages of the first and second connecting valves 8-1 and 8-2 to precisely control the upstream circulation flow rate. This control adjusts the flow rate of the circulating water in the heat storage tower 1 according to the steam flow rate, achieving precise control of the upstream circulation flow rate.

[0077] Lower circulation flow control: The temperature difference is the difference between the temperatures measured by the second temperature measuring unit 10-2 in the middle of the heat storage tower 1 and the third temperature measuring unit 10-3 at the bottom. The frequency of the first water pump 9-1 and the start and stop of the second water pump 9-2 are controlled according to the temperature difference, and the opening and closing of the downstream channels of the first connecting valve 8-1 and the second connecting valve 8-2 are coordinated to control the flow of the lower circulation loop;

[0078] Average temperature control: The average temperature is the average of the temperatures measured by the second temperature measuring unit 10-2 in the middle of the heat storage tower 1 and the third temperature measuring unit 10-3 at the bottom. The change in the average temperature is used to control the start and stop of the drain valve 16 and the second water pump 9-2, accurately control the liquid level, and ensure the storage temperature of the hot water.

[0079] Heat exchanger outlet water temperature control: The start and stop of the third water pump 9-3 is controlled according to the temperature measured by the fifth temperature measuring unit 10-5 at the heat exchanger outlet pipe 5.

[0080] Furthermore, the first connecting valve 8 - 1 , the second connecting valve 8 - 2 , and the drain valve 16 are all three-way valves; and the three-way valves are all electric valves.

[0081] It should be noted that, in this document, relational terms such as first and second, etc., are used solely to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, the terms "include," "comprise," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or terminal device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or terminal device. Without further limitation, elements defined by the phrase "include..." or "comprising..." do not exclude the presence of additional elements in the process, method, article, or terminal device comprising the elements. Furthermore, in this document, "greater than," "less than," "exceeding," etc., are understood to exclude the number itself; "above," "below," "within," etc., are understood to include the number itself.

[0082] Although the above embodiments have been described, those skilled in the art may make additional changes and modifications to these embodiments once they know the basic creative concepts. Therefore, the above descriptions are merely embodiments of the present invention and do not limit the scope of patent protection of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention's description and drawings, or directly or indirectly applied in other related technical fields, are also included in the scope of patent protection of the present invention.

Claims

1. A control system for a heat storage and heat exchange device of a fluctuating steam, used to control a heat storage and heat exchange device of a fluctuating steam, characterized in that: It includes an input unit, a processor, and an output unit; the input unit is connected to the input end of the processor, and the output unit is connected to the output end of the processor; The input unit includes a temperature measuring unit, a pressure measuring unit (11), a flow measuring unit, and a liquid level measuring unit (13); the output unit includes a relief valve (6), a steam regulating valve (7), a connecting valve, a drain valve (16), and a water pump; The heat storage and heat exchange device for fluctuating steam comprises a heat storage tower (1), a heat exchanger (102), and a spray device (103), wherein the spray device (103) is arranged at the upper portion of the heat storage tower (1), and the heat exchanger (102) is arranged at the lower portion of the heat storage tower (1); The bottom of the heat storage tower (1) is connected to the spray device (103) through the second upper pipe section via the second upper circulation inlet (14-2) and to the middle of the heat storage tower (1) through the second lower pipe section via the lower circulation inlet (15-2) via the second lifting pipeline; A steam inlet is provided in the middle of the heat storage tower (1), and a steam pipe (2) is connected to the steam inlet; The heat exchanger (102) is a liquid heat exchanger, comprising a heat exchanger inlet pipe (4) at the bottom and a heat exchanger outlet pipe (5) at the top; The temperature measuring units include a first temperature measuring unit (10-1) arranged at the upper part of the heat storage tower (1), a second temperature measuring unit (10-2) at the middle part, and a third temperature measuring unit (10-3) at the lower part, a fourth temperature measuring unit (10-4) arranged on the heat exchanger inlet pipe (4), a fifth temperature measuring unit (10-5) arranged on the heat exchanger outlet pipe (5), and a seventh temperature measuring unit (10-7) arranged on the second lifting pipeline; The pressure measuring unit (11) and the relief valve (6) are arranged at the top of the heat storage tower (1); the liquid level measuring unit (13) is arranged in the middle of the heat storage tower (1); The flow measurement unit comprises a fourth flow measurement unit (12-4) provided on the steam pipe (2), a third flow measurement unit (12-3) provided on the heat exchanger outlet pipe (5), and a second flow measurement unit (12-2) provided on the second lifting pipeline; The steam regulating valve (7) is arranged on the steam pipeline (2); The connecting valve comprises a second connecting valve (8-2) for connecting a second lifting pipeline, a second upper pipe section, and a second lower pipe section; The drain valve (16) is arranged at the lower part of the second lifting pipeline; The water pump comprises a third water pump (9-3) arranged on the heat exchanger inlet pipe (4) and a second water pump (9-2) arranged on the second lifting pipeline.

2. A control system for a heat storage and heat exchange device for fluctuating steam according to claim 1, characterized in that: The processor includes a calculation module, a control module, an input port, and an output port; the signal measured by the input unit is transmitted from the input port to the calculation module, and after calculation processing, it is transmitted to the control module, and the control module sends the instruction from the output port to the output unit for execution.

3. A control system for a heat storage and heat exchange device for fluctuating steam according to claim 1, characterized in that: The fluctuating steam heat storage and heat exchange device further comprises a first lifting pipeline, which is connected to the spray device (103) via a first upper circulation inlet (14-1) from a first upper pipe section, and is connected to the middle of the heat storage tower (1) via a first lower circulation inlet (15-1) from a first lower pipe section.

4. A control system for a heat storage and heat exchange device for fluctuating steam according to claim 3, characterized in that: The connecting valve further comprises a first connecting valve (8-1) connecting the first lifting pipeline, the first upper pipe section and the first lower pipe section; The water pump further comprises a first water pump (9-1) arranged in a first lifting pipeline; the flow measurement unit further comprises a first flow measurement unit (12-1) arranged in the first lifting pipeline; and the temperature measurement unit further comprises a sixth temperature measurement unit (10-6) arranged in the first lifting pipeline.

5. A control system for a heat storage and heat exchange device for fluctuating steam according to claim 4, characterized in that: The control of the control system includes: Heat storage tower pressure control: The pressure measuring unit transmits the measured pressure signal to the processor, which controls the opening of the relief valve (6), the first connecting valve (8-1), the second connecting valve (8-2), the frequency of the first water pump (9-1), and the start and stop of the second water pump (9-2); Heat storage tower liquid level control: the liquid level measurement unit (13) transmits the measured liquid level signal to the processor, which controls the opening of the drain valve (16), the steam regulating valve (7) and the start and stop of the second water pump (9-2); Up-circulation flow control: the fourth flow measurement unit (12-4) transmits the measured steam flow signal to the processor, which controls the frequency of the first water pump (9-1), the start and stop of the second water pump (9-2), and the opening of the first connecting valve (8-1) and the second connecting valve (8-2); Lower circulation flow control: the temperature signals measured by the second temperature measuring unit (10-2) and the third temperature measuring unit (10-3) are transmitted to the processor, and the processor controls the frequency of the first water pump (9-1), the start and stop of the second water pump (9-2), and the opening degree of the first connecting valve (8-1) and the second connecting valve (8-2); Average temperature control: the temperature signals measured by the second temperature measuring unit (10-2) and the third temperature measuring unit (10-3) are transmitted to the processor, and the processor controls the opening of the sewage valve (16) and the start and stop of the second water pump (9-2); Heat exchanger outlet water temperature control: the temperature signal measured by the fifth temperature measurement unit (10-5) is transmitted to the processor, and the processor controls the start and stop of the third water pump (9-3); The first water pump (9-1) is a variable frequency pump, and the second water pump (9-2) and the third water pump (9-3) are fixed frequency pumps.

6. A control system for a heat storage and heat exchange device for fluctuating steam according to claim 5, characterized in that: The processor comprises an operation module, a control module, an input port, and an output port; in the lower circulation flow control, the temperature signals measured by the second temperature measuring unit (10-2) and the third temperature measuring unit (10-3) are transmitted to the operation module of the processor to calculate the difference and transmit the difference to the control module, and the control module transmits the instruction to the output port to control the opening of the sewage valve (16) and the start and stop of the second water pump (9-2).

7. A control system for a heat storage and heat exchange device for fluctuating steam according to claim 5, characterized in that: The processor comprises an operation module, a control module, an input port, and an output port; in average temperature control, the temperature signals measured by the second temperature measuring unit (10-2) and the third temperature measuring unit (10-3) are transmitted to the operation module of the processor to calculate the average value and transmit the average value to the control module, and the control module transmits the instruction to the output port to control the opening of the sewage valve (16) and the start and stop of the second water pump (9-2).

8. The control system for a heat storage and heat exchange device for fluctuating steam according to claim 5, characterized in that: The first connecting valve (8-1), the second connecting valve (8-2), and the drain valve (16) are all three-way valves; and the three-way valves are all electric valves.

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