Carbon dioxide capture device and carbon capture system

Abstract

The invention discloses a carbon dioxide trapping device and a carbon trapping system.The carbon dioxide trapping device comprises a tower body, a spraying piece and a heat exchange piece are arranged in the tower body, a heat exchange medium flowing circularly is arranged in the heat exchange piece, the device operates in an absorption mode, the spraying piece sprays an absorbent, the absorbent is used for trapping carbon dioxide in smoke, and the carbon dioxide is collected by the absorption piece. And the heat exchange medium in the heat exchange piece cools the absorbent, the device operates in a regeneration mode, and the heat exchange medium in the heat exchange piece heats the absorbent sprayed by the regeneration spraying piece. According to the carbon dioxide capturing device, in the power grid peak regulation matching process, the device operates in an absorption mode, captures carbon dioxide and meets the emission standard, and in the non-peak regulation period, the device operates in a regeneration mode and heats and desorbs carbon dioxide, so that it is ensured that the device operates constantly, and the problem of resource waste caused by shutdown is solved. Moreover, only one tower is needed to realize capture and regeneration of carbon dioxide, so that the occupied area is reduced, and the economic cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas purification, and in particular to a carbon dioxide capture device and a carbon capture system. Background Art

[0002] A carbon capture power plant is a power plant that uses carbon capture technology to capture and process the carbon dioxide it emits. It usually installs an absorption tower and a regeneration tower to achieve the capture and regeneration of carbon dioxide. Since the power generation of a carbon capture power plant fluctuates, a carbon capture power plant is usually used to assist other types of main power plants in peak load regulation. In related technologies, when a carbon capture power plant is not in peak load regulation, the carbon capture system stops operating, resulting in a waste of resources. Summary of the invention

[0003] The present invention is based on the inventor's discovery and understanding of the following facts and problems:

[0004] For example, during the peak period of electricity consumption during the day, the grid load is high, and the carbon capture power plant provides additional power supply to help the main power plant cope with the load. However, at night, the grid load is low, and the carbon capture power plant does not need to cooperate with the grid operation. The carbon capture power plant power generation is adjusted to a low-load operation state, and the carbon capture system does not need to operate, resulting in a waste of resources.

[0005] Furthermore, in the related art, the carbon capture system needs to have at least an absorption tower and a regeneration tower, which results in the system occupying a large area and having a high economic cost.

[0006] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0007] To this end, an embodiment of the present invention proposes a carbon dioxide capture device to solve the problems of resource waste, large floor space and high economic cost.

[0008] The carbon dioxide capture device of the embodiment of the present invention comprises a tower body, the tower body having a gas inlet and a gas outlet, a spraying element and a heat exchange element are arranged in the tower body, the spraying element is used to spray the absorbent, and the heat exchange element has a circulating heat exchange medium in it, so that the heat exchange medium and the absorbent can exchange heat;

[0009] The carbon dioxide capture device has an absorption mode and a regeneration mode. In the absorption mode, the spray element sprays absorbent, and the absorbent is used to capture carbon dioxide in the flue gas entering the tower body through the gas inlet. The purified flue gas is discharged from the tower body through the gas outlet, and the heat exchange medium in the heat exchange element cools the absorbent. In the regeneration mode, the heat exchange medium in the heat exchange element heats and regenerates the absorbent sprayed by the spray element, and the regenerated gas generated by the heated absorbent is discharged from the tower body through the gas outlet.

[0010] The carbon dioxide capture device of the embodiment of the present invention operates in the absorption mode to capture carbon dioxide and meet the emission standards during the peak load regulation of the power grid. During the non-peak load regulation period, the device operates in the regeneration mode to heat and desorb carbon dioxide, thereby ensuring that the device is always running and avoiding the problem of resource waste caused by shutdown. In addition, only one tower is required to achieve carbon dioxide capture and regeneration, reducing the floor space and economic cost.

[0011] In some embodiments, the spray element and the heat exchange element are both in plurality, and the plurality of spray elements and the plurality of heat exchange elements are alternately arranged in a vertical direction.

[0012] In some embodiments, the spray element includes a liquid distribution pipe and a liquid return pipe, the liquid distribution pipe is located inside the tower body, and is provided with a plurality of liquid distribution ports, the liquid return pipe is located outside the tower body, the inlet of the liquid return pipe is connected to the bottom of the tower body, and the outlet of the liquid return pipe is connected to the liquid distribution pipe.

[0013] In some embodiments, the heat exchange element includes a filler and a heat exchange coil, the filler is arranged in the tower body, the heat exchange coil is buried in the filler, and a heat exchange medium circulates in the heat exchange coil.

[0014] In some embodiments, a wire mesh demister is disposed in the tower body, and the wire mesh demister is adjacent to the gas outlet.

[0015] An embodiment of the present invention further provides a carbon capture system.

[0016] The carbon capture system of an embodiment of the present invention comprises an absorbent supply device, a heat exchange medium supply device and the carbon dioxide capture device described in any one of the above embodiments, wherein the absorbent supply device is connected to the carbon dioxide capture device, and the absorbent supply device is used to provide absorbent to the carbon dioxide capture device, and the heat exchange medium supply device is connected to the carbon dioxide capture device, and the heat exchange medium supply device is used to provide heat exchange medium to the carbon dioxide capture device.

[0017] In some embodiments, the carbon dioxide capture device has an absorption mode, a preheating mode, a regeneration mode, and a precooling mode that operate cyclically;

[0018] The carbon dioxide capture device operates in the absorption mode, the absorbent flowing into the carbon dioxide capture device is a lean liquid, the carbon dioxide capture device is used to capture carbon dioxide in the flue gas using the lean liquid, and the lean liquid becomes a low-temperature rich liquid after being saturated with carbon dioxide;

[0019] The carbon dioxide capture device operates in the regeneration mode, the absorbent flowing into the carbon dioxide capture device is a rich liquid, the carbon dioxide capture device is used to heat and regenerate the rich liquid, and the rich liquid becomes a high-temperature lean liquid after heating and regeneration;

[0020] The carbon dioxide capture device operates in the preheating mode, the absorbent flowing into the carbon dioxide capture device is a low-temperature rich liquid, and the carbon dioxide capture device is used to preheat the low-temperature rich liquid with the high-temperature lean liquid;

[0021] The carbon dioxide capture device operates in the precooling mode, the absorbent flowing into the carbon dioxide capture device is a high-temperature lean liquid, and the carbon dioxide capture device is used to precool the high-temperature lean liquid with a low-temperature rich liquid.

[0022] In some embodiments, the carbon dioxide capture device has a plurality of devices, and at least one of the plurality of carbon dioxide capture devices operates in the absorption mode, the preheating mode, the regeneration mode, and the precooling mode.

[0023] In some embodiments, a heat exchanger is provided on the liquid return pipes of any two of the carbon dioxide capture devices, so that the low-temperature rich liquid and the high-temperature lean liquid can exchange heat in the heat exchanger.

[0024] In some embodiments, the heat exchange medium supply device includes a generator set and a cooling tower, the carbon dioxide capture device operates in the absorption mode or the precooling mode, the cooling tower provides cooling water to the carbon dioxide capture device, the carbon dioxide capture device operates in the regeneration mode or the preheating mode, and the generator set provides steam to the carbon dioxide capture device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of a carbon dioxide capture device according to an embodiment of the present invention.

[0026] Figure 2 Schematic diagram of a carbon capture system according to an embodiment of the present invention.

[0027] Figure 3 Schematic diagram of a portion of a carbon capture system according to an embodiment of the present invention.

[0028] Reference numerals:

[0029] 1-tower body, 101-gas inlet, 102-gas outlet, 11-spraying element, 12-heat exchange element, 13-wire mesh demister, 2-absorbent supply device, 3-heat exchange medium supply device, 4-carbon dioxide capture device, 5-heat exchanger. DETAILED DESCRIPTION

[0030] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0031] The carbon dioxide capture device according to the embodiment of the present invention will be described below with reference to the accompanying drawings.

[0032] like Figure 1 As shown, the carbon dioxide capture device 4 of the embodiment of the present invention includes a tower body 1, which is arranged in a vertical direction. The tower body 1 has a gas inlet 101 and a gas outlet 102. The gas inlet 101 is located at the bottom of the tower body 1, and the gas outlet 102 is located at the top of the tower body 1.

[0033] A spraying element 11 and a heat exchange element 12 are provided in the tower body 1. The spraying element 11 is used to spray an absorbent which is an organic amine solution. A circulating heat exchange medium is provided in the heat exchange element 12 so that the heat exchange medium and the absorbent can exchange heat.

[0034] The carbon dioxide capture device 4 according to the embodiment of the present invention has an absorption mode and a regeneration mode.

[0035] When the device operates in the absorption mode in cooperation with the peak load regulation of the power grid, the spraying element 11 sprays the absorbent, which is a lean liquid, and the flue gas enters the tower body 1 through the gas inlet 101. The absorbent is used to capture the carbon dioxide in the flue gas in the tower body 1, and the purified flue gas is discharged from the tower body 1 through the gas outlet 102. At this time, since heat is released during the carbon dioxide capture process, in order to avoid the temperature increase affecting the capture effect, the heat exchange medium in the heat exchange element 12 is used to cool the absorbent.

[0036] Compared with the absorption tower in the related art, a refrigeration unit needs to be added outside the absorption tower, and the absorbent is passed into the refrigeration unit for cooling and then returned to the absorption tower. The carbon dioxide capture device 4 in the embodiment of the present invention passes a heat exchange medium into the tower to promptly remove the heat generated by the capture process, which not only improves the cooling efficiency but also reduces the cost.

[0037] During non-peak-shaving periods, the device operates in regeneration mode, the gas inlet 101 is closed, and the heat exchange medium in the heat exchange element 12 is used to heat the absorbent sprayed by the regeneration spray element 11. The absorbent is a rich liquid after adsorbing carbon dioxide. The regeneration gas generated by heating the absorbent is discharged from the tower body 1 through the gas outlet 102.

[0038] Therefore, the carbon dioxide capture device 4 of the embodiment of the present invention is adapted to different modes of operation of the device by introducing heat exchange media of different temperatures. In the process of cooperating with the peak load regulation of the power grid, the device operates in the absorption mode to capture carbon dioxide and meet the emission standards. During the non-peak load regulation period, the device operates in the regeneration mode to heat and desorb carbon dioxide, thereby ensuring that the device is always running and avoiding the problem of waste of resources caused by shutdown. Moreover, only one tower is required to achieve the capture and regeneration of carbon dioxide, reducing the floor space and economic costs.

[0039] In some embodiments, Figure 1 As shown, there are multiple spraying elements 11 and multiple heat exchange elements 12, and the multiple spraying elements 11 and the multiple heat exchange elements 12 are alternately arranged in the vertical direction.

[0040] It can be understood that the carbon dioxide capture device 4 of the embodiment of the present invention improves the capture efficiency and effect during the capture process and the regeneration efficiency and effect during the regeneration process by providing a multi-stage spray heat exchange structure.

[0041] In some embodiments, Figure 1 As shown, the spraying element 11 includes a liquid distribution pipe and a liquid return pipe. The liquid distribution pipe is located in the tower body 1 and is provided with a plurality of liquid distribution ports. The liquid return pipe is located outside the tower body 1, the inlet of the liquid return pipe is connected to the bottom of the tower body 1, and the outlet of the liquid return pipe is connected to the liquid distribution pipe. The heat exchange element 12 includes a filler and a heat exchange coil. The filler is arranged in the tower body 1, and the heat exchange coil is buried in the filler. There is a circulating heat exchange medium in the heat exchange coil.

[0042] The absorbent is transported into the tower body 1 through the liquid distribution pipe. The absorbent falls into the packing due to its own weight, and the absorbent indirectly exchanges heat with the heat exchange medium in the heat exchange coil. The absorbent falls to the bottom of the tower body 1, and the absorbent is transported back to the middle and upper part of the tower body 1 through the liquid return pipe for full recycling.

[0043] Optionally, a pump (not shown in the figure) is provided on the liquid return pipe to drive the liquid to flow.

[0044] In some embodiments, Figure 1 As shown, a wire mesh demister 13 is provided in the tower body 1 , and the wire mesh demister 13 is adjacent to the gas outlet 102 .

[0045] It can be understood that the wire mesh demister 13 is used to intercept the gas (flue gas or regeneration gas) carrying the absorbent flowing out of the tower body 1, thereby reducing the loss of the absorbent.

[0046] The carbon capture system according to the embodiment of the present invention will be described below with reference to the accompanying drawings.

[0047] like Figures 1 to 3As shown, the carbon capture system according to the embodiment of the present invention comprises an absorbent supply device 2, a heat exchange medium supply device 3 and a carbon dioxide capture device 4 according to any one of the above embodiments.

[0048] The absorbent supply device 2 is connected to the carbon dioxide capture device 4 and is used to supply absorbent to the carbon dioxide capture device 4. The heat exchange medium supply device 3 is connected to the carbon dioxide capture device 4 and is used to supply heat exchange medium to the carbon dioxide capture device 4.

[0049] Optionally, the carbon dioxide capture device 4 has an absorption mode, a preheating mode, a regeneration mode and a precooling mode which are operated cyclically.

[0050] When the carbon dioxide capture device 4 operates in absorption mode, the absorbent flowing into the carbon dioxide capture device 4 is a lean liquid. The carbon dioxide capture device 4 is used to capture carbon dioxide in the flue gas with the lean liquid. The lean liquid becomes a low-temperature rich liquid after being saturated with carbon dioxide.

[0051] When the carbon dioxide capture device 4 operates in the regeneration mode, the absorbent flowing into the carbon dioxide capture device 4 is rich liquid. The carbon dioxide capture device 4 is used to heat and regenerate the rich liquid. The rich liquid is heated and regenerated to become a high-temperature lean liquid.

[0052] When the carbon dioxide capture device 4 operates in the preheating mode, the absorbent flowing into the carbon dioxide capture device 4 is low-temperature rich liquid, and the carbon dioxide capture device 4 is used to preheat the low-temperature rich liquid with the high-temperature lean liquid.

[0053] When the carbon dioxide capture device 4 operates in the precooling mode, the absorbent flowing into the carbon dioxide capture device 4 is a high-temperature lean liquid, and the carbon dioxide capture device 4 is used to precool the high-temperature lean liquid with a low-temperature rich liquid.

[0054] It is understandable that the temperature of the absorbent capturing carbon dioxide is lower than the temperature of the absorbent regeneration. After the carbon dioxide capture device 4 captures carbon dioxide in the flue gas, it uses the heat in the absorbent after heating and regeneration to preheat the absorbent after adsorption saturation, and at the same time reduces the temperature of the absorbent after heating and regeneration, and then heats and regenerates the absorbent after adsorption saturation, thereby improving energy utilization and reducing energy consumption.

[0055] In some embodiments, there are multiple carbon dioxide capture devices 4, and at least one of the multiple carbon dioxide capture devices 4 operates in an absorption mode, a preheating mode, a regeneration mode, and a precooling mode.

[0056] It is understandable that there are at least four carbon dioxide capture devices 4. When one operates in the absorption mode, the other three respectively operate in the preheating mode, the regeneration mode and the precooling mode. When the carbon dioxide capture device 4 operating in the absorption mode ends its operation, the device enters the preheating mode, and the other carbon dioxide capture devices 4 operating in the preheating mode end their operation and enter the regeneration mode, and so on, thereby ensuring the continuity of carbon capture.

[0057] Moreover, compared with the carbon capture system in the related art, the absorption tower only has the function of capturing carbon dioxide, and the regeneration tower only has the function of heating and desorbing carbon dioxide. The carbon capture system of the embodiment of the present invention can complete the two processes of adsorption and regeneration in one tower, avoiding the back and forth transportation of the absorbent, reducing the complexity of pipeline connection and control system, and improving the overall operation efficiency.

[0058] In some embodiments, Figure 3 As shown, a heat exchanger 5 is provided on the liquid return pipes of any two carbon dioxide capture devices 4 so that low-temperature rich liquid and high-temperature lean liquid can exchange heat in the heat exchanger 5 .

[0059] It can be understood that by adding a heat exchanger 5 to the circulation pipeline of the carbon dioxide capture device 4 itself, heat exchange between the liquids in the two towers can be achieved, which is simple to construct and less costly.

[0060] In some embodiments, Figure 2 As shown, the heat exchange medium supply device 3 includes a generator set and a cooling tower.

[0061] When the carbon dioxide capture device 4 operates in the absorption mode, the cooling tower provides cooling water to the carbon dioxide capture device 4. When the carbon dioxide capture device 4 operates in the pre-cooling mode, the high-temperature lean liquid and the low-temperature rich liquid first perform heat exchange, and when the temperature of the lean liquid can no longer be further cooled by the rich liquid, the cooling tower provides cooling water to the carbon dioxide capture device 4 to reduce the lean liquid to the temperature required for the absorption mode.

[0062] When the CO2 capture device 4 operates in the regeneration mode, steam is extracted from the intermediate pressure cylinder of the generator set and provided to the CO2 capture device 4 to heat the regenerated absorbent. When the CO2 capture device 4 operates in the preheating mode, the low-temperature rich liquid and the high-temperature lean liquid are first heat-exchanged until the temperature of the rich liquid can no longer be further heated by the lean liquid, and then the generator set provides steam to the CO2 capture device 4, and then the CO2 capture device 4 is switched to the regeneration mode.

[0063] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0064] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0065] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0067] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0068] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A carbon dioxide capture device, characterized in that: The tower body comprises a tower body having a gas inlet and a gas outlet, a spraying part and a heat exchange part are arranged in the tower body, the spraying part is used to spray the absorbent, and the heat exchange part has a circulating heat exchange medium in it so that the heat exchange medium and the absorbent can exchange heat; The carbon dioxide capture device has an absorption mode and a regeneration mode. In the absorption mode, the spray element sprays absorbent, and the absorbent is used to capture carbon dioxide in the flue gas entering the tower body through the gas inlet. The purified flue gas is discharged from the tower body through the gas outlet, and the heat exchange medium in the heat exchange element cools the absorbent. In the regeneration mode, the heat exchange medium in the heat exchange element heats and regenerates the absorbent sprayed by the spray element, and the regenerated gas generated by the heated absorbent is discharged from the tower body through the gas outlet.

2. The carbon dioxide capture device according to claim 1, characterized in that: There are a plurality of the spraying elements and a plurality of the heat exchanging elements, and the plurality of the spraying elements and the plurality of the heat exchanging elements are alternately arranged in a vertical direction.

3. The carbon dioxide capture device according to claim 2, characterized in that: The spray component includes a liquid distribution pipe and a liquid return pipe. The liquid distribution pipe is located inside the tower body and is provided with a plurality of liquid distribution ports. The liquid return pipe is located outside the tower body. The inlet of the liquid return pipe is connected to the bottom of the tower body, and the outlet of the liquid return pipe is connected to the liquid distribution pipe.

4. The carbon dioxide capture device according to claim 2, characterized in that: The heat exchange element comprises a filler and a heat exchange coil, wherein the filler is arranged in the tower body, the heat exchange coil is buried in the filler, and a heat exchange medium circulates in the heat exchange coil.

5. The carbon dioxide capture device according to any one of claims 1 to 4, characterized in that: A wire mesh demister is arranged in the tower body and is adjacent to the gas outlet.

6. A carbon capture system, characterized in that: It comprises an absorbent supply device, a heat exchange medium supply device and a carbon dioxide capture device according to any one of claims 1 to 5, wherein the absorbent supply device is connected to the carbon dioxide capture device, the absorbent supply device is used to provide absorbent to the carbon dioxide capture device, and the heat exchange medium supply device is connected to the carbon dioxide capture device, the heat exchange medium supply device is used to provide heat exchange medium to the carbon dioxide capture device.

7. The carbon capture system according to claim 6, characterized in that The carbon dioxide capture device has an absorption mode, a preheating mode, a regeneration mode and a precooling mode for cyclic operation; The carbon dioxide capture device operates in the absorption mode, the absorbent flowing into the carbon dioxide capture device is a lean liquid, the carbon dioxide capture device is used to capture carbon dioxide in the flue gas using the lean liquid, and the lean liquid becomes a low-temperature rich liquid after being saturated with carbon dioxide; The carbon dioxide capture device operates in the regeneration mode, the absorbent flowing into the carbon dioxide capture device is a rich liquid, the carbon dioxide capture device is used to heat and regenerate the rich liquid, and the rich liquid becomes a high-temperature lean liquid after heating and regeneration; The carbon dioxide capture device operates in the preheating mode, the absorbent flowing into the carbon dioxide capture device is a low-temperature rich liquid, and the carbon dioxide capture device is used to preheat the low-temperature rich liquid with the high-temperature lean liquid; The carbon dioxide capture device operates in the precooling mode, the absorbent flowing into the carbon dioxide capture device is a high-temperature lean liquid, and the carbon dioxide capture device is used to precool the high-temperature lean liquid with a low-temperature rich liquid.

8. The carbon capture system according to claim 7, characterized in that There are a plurality of the carbon dioxide capture devices, and at least one of the plurality of carbon dioxide capture devices operates in the absorption mode, the preheating mode, the regeneration mode, and the precooling mode.

9. The carbon capture system according to claim 8, characterized in that A heat exchanger is provided on the liquid return pipes of any two of the carbon dioxide capture devices, so that the low-temperature rich liquid and the high-temperature lean liquid can exchange heat in the heat exchanger.

10. The carbon capture system according to claim 9, characterized in that The heat exchange medium supply device includes a generator set and a cooling tower. The carbon dioxide capture device operates in the absorption mode or the precooling mode. The cooling tower provides cooling water to the carbon dioxide capture device. The carbon dioxide capture device operates in the regeneration mode or the preheating mode. The generator set provides steam to the carbon dioxide capture device.

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