Coal light and carbon capture integrated system and control method thereof

Abstract

The invention discloses a light coal and carbon capture integrated system and a control method thereof, a tail flue outlet of a boiler is communicated with an inlet of an absorption tower through a fourth valve, a rich liquid outlet of the absorption tower is communicated with an inlet of a desorption tower through a pipe side of a lean and rich liquid heat exchanger, and a carbon dioxide outlet is formed in the top of the desorption tower; the barren liquor outlet of the desorption tower is communicated with the barren liquor inlet of the absorption tower through the heat absorption side of the reboiler and the shell side of the barren and rich liquor heat exchanger; the outlet of the collector is communicated with the shell side of the low-pressure heater through a second valve, the outlet of the collector is communicated with the heat release side of the reboiler through a third valve, and the outlet of the medium-pressure cylinder is communicated with the inlet of the collector through a first valve; the system and the control method thereof can realize organic combination and cooperative work of the coal-fired power plant, the solar power generation system, the energy storage facility and the carbon capture device.

Description

Technical Field

[0001] The present invention belongs to the field of energy conservation and emission reduction, and relates to an integrated system for light coal carbon capture and its control method. Background Art

[0002] Global warming has become one of the most severe challenges faced by humanity. The coal-fired power generation industry, as one of the main greenhouse gas emission sources, is facing huge emission reduction pressures. The integrated system for light storage and carbon capture proposed in this study can significantly reduce the carbon emissions of coal-fired power plants by combining renewable energy and carbon capture technologies. Although renewable energy has developed rapidly, considering factors such as energy security, economic development, and grid stability, coal-fired power generation will still occupy an important position in the global energy structure for a long time, especially in developing countries. Traditional coal-fired power plants, solar power generation systems, energy storage facilities, and carbon capture devices usually operate independently, and this decentralized operation mode has problems such as low efficiency and difficult coordination. Summary of the Invention

[0003] The purpose of the present invention is to overcome the above-mentioned disadvantages of the prior art, and provides an integrated system for light coal carbon capture and its control method, which can organically combine and work together coal-fired power plants, solar power generation systems, energy storage facilities, and carbon capture devices.

[0004] To achieve the above purpose, the present invention discloses an integrated system for light coal carbon capture, including a collector, an oil-water heat exchanger, a steam-water separator, a collector, a boiler, an absorption tower, a rich-lean liquid heat exchanger, a desorption tower, a reboiler, and an intermediate pressure cylinder;

[0005] The collector is connected to the oil side of the oil-water heat exchanger, the water side outlet of the oil-water heat exchanger is connected to the inlet of the steam-water separator, and the steam side outlet of the steam-water separator is connected to the inlet of the collector; the outlet of the tail flue of the boiler is connected to the inlet of the absorption tower through a fourth valve, the rich liquid outlet of the absorption tower is connected to the inlet of the desorption tower through the tube side of the rich-lean liquid heat exchanger, the top of the desorption tower is provided with a carbon dioxide outlet, and the lean liquid outlet of the desorption tower is connected to the lean liquid inlet of the absorption tower through the heat absorption side of the reboiler and the shell side of the rich-lean liquid heat exchanger;

[0006] The outlet of the collector is connected to the shell side of the low-pressure heater through a second valve, the outlet of the collector is connected to the heat release side of the reboiler through a third valve, and the outlet of the intermediate pressure cylinder is connected to the inlet of the collector through a first valve.

[0007] A further improvement of the integrated system for light coal carbon capture of the present invention lies in:

[0008] Further, the outlet of the tail flue of the boiler is connected to the inlet of the absorption tower through a flue gas storage tank and a fourth valve.

[0009] Further, the lean liquid outlet of the desorption tower is connected to the inlet of the mixer through the heat absorption side of the reboiler and the shell side of the lean-rich liquid heat exchanger, and the outlet of the mixer is connected to the lean liquid inlet of the absorption tower.

[0010] Further, it also includes a make-up liquid pipeline, and the make-up liquid pipeline is connected to the inlet of the mixer.

[0011] The present invention discloses a control method for an integrated optical coal carbon capture system, including the following steps:

[0012] When the light intensity becomes stronger and the unit load is constant, the amount of steam at the outlet of the steam-water separator increases, then control the opening degrees of the third valve and the fourth valve to increase, and at the same time keep the opening degrees of the first valve and the second valve;

[0013] When the light intensity becomes weaker and the unit load is constant, the amount of steam at the outlet of the steam-water separator decreases, then control the opening degrees of the fourth valve and the third valve to decrease, and at the same time keep the opening degrees of the first valve and the second valve unchanged;

[0014] When the light intensity remains unchanged and the unit load decreases, at this time the amount of flue gas entering the flue gas storage tank decreases, then control the opening degrees of the first valve, the third valve and the fourth valve to decrease, and at the same time control the opening degree of the second valve to increase;

[0015] When the light intensity remains unchanged and the unit load increases, at this time the amount of flue gas entering the flue gas storage tank increases, then control the opening degrees of the first valve, the second valve, the third valve and the fourth valve to increase.

[0016] A further improvement of the control method for the integrated optical coal carbon capture system of the present invention lies in:

[0017] Further, the pressure of the steam-water separator is 0.5 Mpa.

[0018] Further, in the oil-water heat exchanger, the temperature range of the heat transfer oil is 300 - 350 °C, and the temperature range of the water is 140 - 152 °C.

[0019] Further, the temperature range of the steam in the reboiler is 120 - 125 °C.

[0020] Further, the outlet of the tail flue of the boiler is connected to the inlet of the absorption tower through the flue gas storage tank and the fourth valve.

[0021] Further, the location of the flue gas storage tank is an abandoned coal mine shaft.

[0022] The present invention has the following beneficial effects:

[0023] When the integrated light and coal carbon capture system and its control method of the present invention are specifically operated, a coal-fired power plant, a solar power generation system, an energy storage facility, and a carbon capture device are organically combined. At the same time, according to different conditions, by adjusting the opening degrees of the first valve, the second valve, the third valve, and the fourth valve, the complementary operation of each module is realized. The structure is simple and the practicability is extremely strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The specification drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0025] Figure 1 It is a structural diagram of the present invention.

[0026] Among them, 1 is a collector, 2 is an oil-water heat exchanger, 3 is a steam-water separator, 4 is a flue gas storage tank, 5 is an absorption tower, 6 is a mixer, 7 is a rich and lean liquid exchanger, 8 is a desorption tower, 9 is a reboiler, 10 is a collector, 11a is a first valve, 11b is a second valve, 11c is a third valve, and 11d is a fourth valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts fall within the protection scope of the present invention.

[0028] In the description of the present invention, it should be understood that the terms "include" and "comprise" indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their collections.

[0029] It should also be understood that the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to include the plural forms.

[0030] It should be further understood that the term "and / or" used in the specification and appended claims of the present invention refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations. For example, A and / or B can represent three cases: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the present invention, the character " / " generally indicates an "or" relationship between the associated objects before and after.

[0031] It should be understood that although terms such as first, second, and third may be used in the embodiments of the present invention to describe preset ranges, etc., these preset ranges should not be limited to these terms. These terms are only used to distinguish the preset ranges from each other. For example, without departing from the scope of the embodiments of the present invention, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

[0032] Depending on the context, the word "if" as used herein can be interpreted as "when" or "while" or "in response to determining" or "in response to detecting". Similarly, depending on the context, the phrase "if determined" or "if detected (stated condition or event)" can be interpreted as "when determined" or "in response to determining" or "when detected (stated condition or event)" or "in response to detecting (stated condition or event)".

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Usually, the components described and shown in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents the selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0034] Schematic diagrams of various structures according to the disclosed embodiments of the present invention are shown in the drawings. These figures are not drawn to scale, where for the purpose of clear expression, some details are enlarged and some details may be omitted. The shapes of various regions and layers shown in the figures and their relative sizes and positional relationships are only exemplary, and may actually deviate due to manufacturing tolerances or technical limitations. And those skilled in the art can design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0035] Embodiment 1

[0036] Reference Figure 1 For the integrated optical coal carbon capture system of the present invention, it includes a collector 1, an oil-water heat exchanger 2, a steam-water separator 3, a flue gas storage tank 4, an absorption tower 5, a mixer 6, a rich and lean liquid heat exchanger 7, a desorption tower 8, a reboiler 9, a collector 10, a first valve 11a, a second valve 11b, a third valve 11c and a fourth valve 11d;

[0037] The main steam outlet of the boiler is communicated with the inlet of the high-pressure cylinder, the outlet of the high-pressure cylinder is communicated with the inlet of the reheating side of the boiler, the outlet of the reheating side of the boiler is communicated with the inlet of the intermediate-pressure cylinder, the outlet of the intermediate-pressure cylinder is communicated with the inlet of the low-pressure cylinder, and the outlet of the intermediate-pressure cylinder is communicated with the inlet of the collector 10 through the first valve 11a;

[0038] The collector 1 is communicated with the oil side of the oil-water heat exchanger 2, the water side outlet of the oil-water heat exchanger 2 is communicated with the inlet of the steam-water separator 3, and the steam side outlet of the steam-water separator 3 is communicated with the inlet of the collector 10;

[0039] The outlet of the tail flue of the boiler is communicated with the inlet of the flue gas storage tank 4, the outlet of the flue gas storage tank 4 is communicated with the inlet of the absorption tower 5 through the fourth valve 11d, the rich liquid outlet of the absorption tower 5 is communicated with the inlet of the desorption tower 8 through the tube side of the rich and lean liquid heat exchanger 7, a carbon dioxide outlet is arranged at the top of the desorption tower 8, the lean liquid outlet of the desorption tower 8 is communicated with the inlet of the mixer 6 through the heat absorption side of the reboiler 9 and the shell side of the rich and lean liquid heat exchanger 7, the outlet of the mixer 6 is communicated with the lean liquid inlet of the absorption tower 5, and the make-up liquid pipeline is communicated with the inlet of the mixer 6;

[0040] The outlet of the collector 10 is communicated with the shell side of the low-pressure heater through the second valve 11b, and the outlet of the collector 10 is communicated with the heat release side of the reboiler 9 through the third valve 11c.

[0041] The working process of the present invention is as follows:

[0042] The heat-conducting oil output by the collector 1 enters the oil-water heat exchanger 2 to release heat and then returns to the oil-water heat exchanger 2. Water absorbs heat and increases in temperature in the oil-water heat exchanger 2 and then enters the steam-water separator 3 for separation. Among them, the gas output by the steam-water separator 3 enters the collector 10, and the water output by the steam-water separator 3 enters the oil-water heat exchanger 2. The flue gas output by the boiler enters the flue gas storage tank 4, and the flue gas output by the flue gas storage tank 4 enters the absorption tower 5 through the fourth valve 11d to absorb carbon dioxide and then is discharged from the top of the absorption tower 5. The rich liquid output by the absorption tower 5 enters the rich and lean liquid heat exchanger 7 and then enters the desorption tower 8 for desorption. Among them, the carbon dioxide output by the desorption tower 8 is discharged, and the lean liquid output by the desorption tower 8 enters the rich and lean liquid heat exchanger 7 after absorbing heat through the reboiler 9 for heat exchange and then returns to the absorption tower 5 through the mixer 6. Part of the exhaust steam output by the intermediate pressure cylinder enters the collector 10, and the steam output by the collector 10 is divided into two paths. One path enters the low-pressure heater through the second valve 11b, and the other path enters the reboiler 9 through the third valve 11c to release heat.

[0043] Embodiment 2

[0044] Reference Figure 1 , the control method of the integrated optical coal carbon capture system of the present invention includes the following steps:

[0045] When the light intensity becomes stronger and the unit load is constant, the amount of steam at the outlet of the steam-water separator 3 increases, so the opening degrees of the third valve 11c and the fourth valve 11d are controlled to increase, and at the same time, the opening degrees of the first valve 11a and the second valve 11b are maintained.

[0046] When the light intensity becomes weaker and the unit load is constant, the amount of steam at the outlet of the steam-water separator 3 decreases, so the opening degrees of the fourth valve 11d and the third valve 11c are controlled to decrease, and at the same time, the opening degrees of the first valve 11a and the second valve 11b are maintained unchanged.

[0047] When the light intensity remains unchanged and the unit load decreases, at this time, the amount of flue gas entering the flue gas storage tank 4 decreases, so the opening degrees of the first valve 11a, the third valve 11c, and the fourth valve 11d are controlled to decrease, and at the same time, the opening degree of the second valve 11b is controlled to increase.

[0048] When the light intensity remains unchanged and the unit load increases, at this time, the amount of flue gas entering the flue gas storage tank 4 increases, so the opening degrees of the first valve 11a, the second valve 11b, the third valve 11c, and the fourth valve 11d are controlled to increase.

[0049] The minimum carbon dioxide capture rate of the present invention is 90%; the pressure of the steam-water separator 3 is 0.5 Mpa.

[0050] In the oil-water heat exchanger 2, the temperature range of the heat-conducting oil is 300 - 350 °C, and the temperature range of the water is 140 - 152 °C; in the reboiler 9, the temperature range of the steam is 120 - 125 °C.

[0051] In this embodiment, the waste gas coal mine is selected as the location of the flue gas storage tank 4.

[0052] The present invention has the following characteristics:

[0053] The present invention organically combines photovoltaic power generation, coal power generation, and carbon capture technologies to achieve the coordinated operation of multiple energy sources and environmental protection technologies.

[0054] By adjusting the collector 10, the flue gas storage tank 4, the first valve 11a, the second valve 11b, the third valve 11c, and the fourth valve 11d, the present invention can flexibly adjust the operation mode according to the changes in light intensity and unit load, improving the overall operation efficiency.

[0055] The present invention integrates a carbon capture system, which can effectively reduce the carbon emissions of coal-fired power units and achieve clean production.

[0056] By using the collector 10, the present invention realizes the multiple distribution and flow of heat, improving the stability of the system.

[0057] Finally, it should be noted that the present invention organically combines each independent unit. Through unified scheduling and optimized operation, the energy utilization efficiency and economy of the overall system can be significantly improved. For example, the surplus power generated by solar power generation can be used to drive the carbon capture process, or the excess power can be used for carbon capture during the low load period of the power grid to achieve the optimal allocation of resources.

[0058] The division of modules in the embodiments of the present application is illustrative, merely a logical function division. In actual implementation, there may be other division methods. In addition, in each embodiment of the present application, each functional module can be integrated in a processor, or can exist alone physically, or two or more modules can be integrated in one module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. The integrated optical coal carbon capture system and its control method proposed by the present invention provide a feasible path for the green transformation of traditional coal-fired power plants, enabling them to gradually integrate renewable energy and low-carbon technologies while maintaining their basic functions and achieving a smooth transition.

[0059] Embodiment 3

[0060] A computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the steps of the control method of the integrated optical coal carbon capture system. For example, it includes: when the light intensity becomes stronger and the unit load is constant, the steam volume at the outlet of the steam separator 3 increases, then control the opening degrees of the third valve 11c and the fourth valve 11d to increase, while keeping the opening degrees of the first valve 11a and the second valve 11b; when the light intensity becomes weaker and the unit load is constant, the steam volume at the outlet of the steam separator 3 decreases, then control the opening degrees of the fourth valve 11d and the third valve 11c to decrease, while keeping the opening degrees of the first valve 11a and the second valve 11b unchanged; when the light intensity remains unchanged and the unit load decreases, at this time the flue gas volume entering the flue gas storage tank 4 decreases, then control the opening degrees of the first valve 11a, the third valve 11c, and the fourth valve 11d to decrease, while controlling the opening degree of the second valve 11b to increase; when the light intensity remains unchanged and the unit load increases, at this time the flue gas volume entering the flue gas storage tank 4 increases, then control the opening degrees of the first valve 11a, the second valve 11b, the third valve 11c, and the fourth valve 11d to increase. Among them, the memory may include internal memory, such as high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk memory, etc.; the processor, network interface, and memory are interconnected through an internal bus, and this internal bus can be an Industry Standard Architecture bus, a Peripheral Component Interconnect standard bus, an Extended Industry Standard Architecture bus, etc., and the bus can be divided into an address bus, a data bus, a control bus, etc. The memory is used to store programs. Specifically, the program can include program code, and the program code includes computer operation instructions. The memory can include internal memory and non-volatile memory, and provide instructions and data to the processor.

[0061] Embodiment Four

[0062] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, it implements the steps of the control method of the integrated optical coal carbon capture system. For example, it includes: when the light intensity becomes stronger and the unit load is constant, the steam volume at the outlet of the steam separator 3 increases, then control the opening degrees of the third valve 11c and the fourth valve 11d to increase, and at the same time maintain the opening degrees of the first valve 11a and the second valve 11b; when the light intensity becomes weaker and the unit load is constant, the steam volume at the outlet of the steam separator 3 decreases, then control the opening degrees of the fourth valve 11d and the third valve 11c to decrease, and at the same time maintain the opening degrees of the first valve 11a and the second valve 11b unchanged; when the light intensity remains unchanged and the unit load decreases, at this time the flue gas volume entering the flue gas storage tank 4 decreases, then control the opening degrees of the first valve 11a, the third valve 11c and the fourth valve 11d to decrease, and at the same time control the opening degree of the second valve 11b to increase; when the light intensity remains unchanged and the unit load increases, at this time the flue gas volume entering the flue gas storage tank 4 increases, then control the opening degrees of the first valve 11a, the second valve 11b, the third valve 11c and the fourth valve 11d to increase. Specifically, the computer-readable storage medium includes but is not limited to, for example, volatile memory and / or non-volatile memory. The volatile memory may include random access memory (RAM) and / or cache memory, etc. The non-volatile memory may include read-only memory (ROM), hard disk, flash memory, optical disc, magnetic disk, etc.

[0063] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0064] The present application is described with reference to the flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram can be implemented by computer program instructions, and the combination of the flows and / or blocks in the flowchart and / or block diagram can also be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for implementing the specified functions in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0065] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to operate in a particular manner, such that the instructions stored in the computer-readable memory produce a manufacture including an instruction device that implements the functions specified in one or more of the processes and / or blocks Figure 1 of one or more of the processes and / or blocks Figure 1 specified in the flowcharts or block diagrams.

[0066] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process, so that the instructions executed on the computer or other programmable apparatus provide steps for implementing the functions specified in one or more of the processes and / or blocks Figure 1 of one or more of the processes and / or blocks Figure 1 specified in the flowcharts or block diagrams.

[0067] Other embodiments of the present invention will be readily apparent to those skilled in the art upon consideration of the specification and the disclosure of the invention. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice in the art to which the invention pertains and which are not disclosed herein. The specification and examples are to be considered exemplary only, with the true scope and spirit of the invention being indicated by the following claims.

[0068] It should be understood that the present invention is not limited to the exact construction described above and shown in the accompanying drawings and that various modifications and changes may be made without departing from its scope. The scope of the invention is limited only by the appended claims.

[0069] The above are only the preferred embodiments of the present invention and do not limit the present invention in any way. Any simple modifications, changes, and equivalent structural changes made to the above embodiments according to the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. An integrated system for light coal carbon capture, characterized in that, It includes a collector (1), an oil-water heat exchanger (2), a steam-water separator (3), a collector (10), a boiler, an absorption tower (5), a rich-lean liquid heat exchanger (7), a desorption tower (8), a reboiler (9) and a medium-pressure cylinder; The collector (1) is connected to the oil side of the oil-water heat exchanger (2). The water-side outlet of the oil-water heat exchanger (2) is connected to the inlet of the steam-water separator (3). The steam-side outlet of the steam-water separator (3) is connected to the inlet of the collector (10). The outlet of the tail flue of the boiler is connected to the inlet of the absorption tower (5) via a fourth valve (11d). The rich liquid outlet of the absorption tower (5) is connected to the inlet of the desorption tower (8) via the tube side of the rich-lean liquid heat exchanger (7). A carbon dioxide outlet is provided at the top of the desorption tower (8). The lean liquid outlet of the desorption tower (8) is connected to the lean liquid inlet of the absorption tower (5) via the heat absorption side of the reboiler (9) and the shell side of the rich-lean liquid heat exchanger (7); The outlet of the collector (10) is connected to the shell side of the low-pressure heater via a second valve (11b). The outlet of the collector (10) is connected to the heat release side of the reboiler (9) via a third valve (11c). The outlet of the medium-pressure cylinder is connected to the inlet of the collector (10) via a first valve (11a).

2. The integrated optical coal carbon capture system according to claim 1, characterized in that, The outlet of the tail flue of the boiler is connected to the inlet of the absorption tower (5) via a flue gas storage tank (4) and a fourth valve (11d).

3. The integrated light and coal carbon capture system according to claim 1, characterized in that The lean liquid outlet of the desorption tower (8) is connected to the inlet of a mixer (6) via the heat absorption side of the reboiler (9) and the shell side of the rich-lean liquid heat exchanger (7). The outlet of the mixer (6) is connected to the lean liquid inlet of the absorption tower (5).

4. The integrated optical coal carbon capture system according to claim 1, wherein It further includes a makeup liquid pipeline which is connected to the inlet of the mixer (6).

5. A control method for the integrated optical coal carbon capture system according to claim 1, characterized in that, It includes the following steps: When the light intensity becomes stronger and the unit load is constant, the amount of steam at the outlet of the steam-water separator (3) increases. Then, control the opening degrees of the third valve (11c) and the fourth valve (11d) to increase, while keeping the opening degrees of the first valve (11a) and the second valve (11b); When the light intensity becomes weaker and the unit load is constant, the amount of steam at the outlet of the steam-water separator (3) decreases. Then, control the opening degrees of the fourth valve (11d) and the third valve (11c) to decrease, while keeping the opening degrees of the first valve (11a) and the second valve (11b) unchanged; When the light intensity remains unchanged and the unit load decreases, at this time the amount of flue gas entering the flue gas storage tank (4) decreases. Then, control the opening degrees of the first valve (11a), the third valve (11c) and the fourth valve (11d) to decrease, while controlling the opening degree of the second valve (11b) to increase; When the light intensity remains unchanged and the unit load increases, at this time the amount of flue gas entering the flue gas storage tank (4) increases. Then, control the opening degrees of the first valve (11a), the second valve (11b), the third valve (11c) and the fourth valve (11d) to increase.

6. The control method of the integrated light and coal carbon capture system according to claim 5, characterized in that, The pressure of the steam-water separator (3) is 0.5 Mpa.

7. The control method of the integrated system for optical coal carbon capture according to claim 5, characterized in that In the oil-water heat exchanger (2), the temperature range of the heat transfer oil is 300 - 350 °C, and the temperature range of the water is 140 - 152 °C.

8. The control method of the integrated optical coal carbon capture system according to claim 5, characterized in that, The temperature range of the steam in the reboiler (9) is 120 - 125 °C.

9. The control method of the integrated light and coal carbon capture system according to claim 5, characterized in that, The outlet of the tail flue of the boiler is connected to the inlet of the absorption tower (5) through the flue gas storage tank (4) and the fourth valve (11d).

10. The control method of the integrated optical coal carbon capture system according to claim 9, characterized in that, The location of the flue gas storage tank (4) is an exhaust coal mine shaft.

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