CO2 removal equipment and combustion equipment

Abstract

Running costs can be reduced. [Solution] The CO2 removal device for removing CO2 from a gas comprises: an absorption tower configured to introduce gas into its internal space and scatter adsorbent powder into the internal space to adsorb CO2 contained in the gas onto the adsorbent powder; a dust collector configured to collect the adsorbent powder from the gas that has passed through the absorption tower; a transport line connected to the dust collector and the absorption tower, configured to transport the adsorbent powder collected by the dust collector toward the absorption tower; and a heating device configured to heat the adsorbent powder transported by the transport line.

Description

Technical Field

[0001] The present disclosure relates to a CO2 removal device for removing CO2 from a gas, and a combustion facility including the CO2 removal device.

Background Art

[0002] As a CO2 removal device, for example, Patent Document 1 discloses a technique of blowing an amine-containing polymer carbon adsorbent into a duct and mixing it with exhaust gas flowing through the duct, and adsorbing a target substance to be collected containing CO2 by the adsorbent. Further, Patent Document 1 describes providing a dust collector for collecting the adsorbent that has adsorbed CO2, and regenerating the adsorbent collected by the dust collector.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, Patent Document 1 does not disclose a specific configuration for regenerating the adsorbent. Further, the CO2 removal device is desirably configured so that the adsorbent is efficiently regenerated and the running cost is suppressed.

[0005] The present disclosure has been made in view of the above problems, and an object thereof is to provide a CO2 removal device capable of suppressing the running cost.

Means for Solving the Problems

[0006] To achieve the above object, a CO2 removal device according to the present disclosure is a CO2 removal device that removes CO2 from a gas, and includes an absorption tower configured to introduce the gas into an internal space and scatter an adsorbent powder in the internal space to adsorb CO2 contained in the gas onto the adsorbent powder, a dust collector configured to collect the adsorbent powder from the gas that has passed through the absorption tower, a transfer line configured to connect the dust collector and the absorption tower and transfer the adsorbent powder collected by the dust collector toward the absorption tower, and a heating device configured to heat the adsorbent powder transferred in the transfer line.

Advantages of the Invention

[0007] According to the CO2 removal device of the present disclosure, the running cost can be suppressed.

Brief Description of the Drawings

[0008] [Figure 1] It is a diagram schematically showing the configuration of a CO2 removal device according to an embodiment. [Figure 2] It is a diagram schematically showing the configuration of a combustion facility including a CO2 removal device according to an embodiment. [Figure 3] It is a diagram schematically showing an example of the configuration of a combustion facility different from that in FIG. 2.

Modes for Carrying Out the Invention

[0009] Hereinafter, a CO2 removal device according to an embodiment of the present disclosure and a combustion facility including this CO2 removal device will be described based on the drawings. Such an embodiment shows one aspect of the present disclosure, does not limit this disclosure, and can be arbitrarily changed within the scope of the technical idea of this disclosure.

[0010] <CO2 Removal Device> (Configuration) The CO2 removal device described herein removes CO2 from a gas. The gas from which CO2 is to be removed is not particularly limited. In some embodiments, the CO2 removal device employs direct air capture (DAC) to recover CO2 from the atmosphere.

[0011] Figure 1 is a schematic diagram showing the configuration of a CO2 removal device 1 according to one embodiment. As shown in Figure 1, the CO2 removal device 1 includes an absorption tower 2, a dust collector 4, a transport line 6, and a heating device 8. In the embodiment illustrated in Figure 1, the CO2 removal device 1 further includes a humidifier 10 and a fan 12.

[0012] The absorption tower 2 has a cylindrical shape extending in one direction and introduces gas into its internal space 3. This absorption tower 2 is configured to scatter adsorbent powder P into the internal space 3 and adsorb CO2 contained in the gas onto the adsorbent powder P. In the embodiment illustrated in Figure 1, the absorption tower 2 extends along the vertical direction D1 and introduces air A into the internal space 3. The inlet 3a of the internal space 3 is located below the outlet 3b of the internal space 3. In the vertical direction D1, the absorption tower 2 has a supply port 5 formed in the portion between the inlet 3a and the outlet 3b of the internal space 3. The CO2 removal device 1 further includes a supply device 14 that supplies adsorbent powder P into the internal space 3 through this supply port 5. The absorption tower 2 includes an expanding section 16 that expands the diameter of the internal space 3 as it extends upward above the supply port 5.

[0013] The adsorbent powder P supplied into the internal space 3 by the supply device 14 flows upward with the air A and adsorbs CO2 contained in the air A. This adsorbent powder P is an aggregate of multiple particles. In one embodiment, the particles contain amines and absorb CO2. The shape and particle size are not particularly limited, but for example, 10 μm or more and 5 mm or less are preferred and are controlled in relation to the backwashing function of the bag filter device. In this disclosure, particles containing amines are used as the adsorbent powder P, but particles containing components other than amines may be used as the adsorbent powder P as long as they can absorb CO2.

[0014] The dust collector 4 is configured to collect adsorbent powder P from the air A (gas) that has passed through the absorption tower 2. In the embodiment illustrated in Figure 1, the dust collector 4 includes a filter casing 20 and a bag filter 22.

[0015] The filter casing 20 has a box shape and has a containment chamber 21 through which air A flows. The filter casing 20 is connected to the absorption tower 2 via a connection line 24 that communicates with the outlet 3b of the internal space 3. Air A that has passed through the absorption tower 2 flows through the connection line 24 and into the filter casing 20 (i.e., the containment chamber 21). The adsorbent powder P flows through the connection line 24 and the containment chamber 21 together with the air A, adsorbing CO2 contained in the air A. The filter casing 20 has an exhaust port 25 for discharging the air A from the containment chamber 21 in which the adsorbent powder P has been collected (hereinafter referred to as CO2-removed air A1). The exhaust port 25 may be open to the atmosphere or may be connected to piping through which the CO2-removed air A1 flows.

[0016] In one embodiment, as illustrated in Figure 1, the floor surface 26 of the filter casing 20 includes an inclined portion 28 that slopes downward toward the inlet 6a of the conveyor line 6. The inclined portion 28 is located below the bag filter 22 and is designed to guide the adsorbent powder P that has been brushed off from the bag filter 22 toward the inlet 6a of the conveyor line 6. In one embodiment, as illustrated in Figure 1, the floor surface 26 of the filter casing 20 has a discharge hole 27 for discharging clumps PM formed by multiple adsorbent powders P binding together. The entire floor surface 26 of the filter casing 20 may be the inclined portion 28, or only a part of it may be the inclined portion 28.

[0017] The bag filter 22 is a bag-shaped filter cloth, and multiple bag filters are housed in the containment chamber 21. The bag filter 22 collects adsorbent powder P from the air A flowing through the containment chamber 21. Specifically, the bag filter 22 collects the adsorbent powder P as the air A passes through the bag filter 22. The air A from which the adsorbent powder P has been collected by the bag filter 22 is discharged to the outside of the filter casing 20 through the exhaust port 25 as CO2-removed air A1.

[0018] In one embodiment, as illustrated in Figure 1, the dust collector 4 further includes an injection device 30 that injects pressurized air Ab so that it flows from the inside to the outside of a bag-shaped bag filter 22. The adsorbent powder P collected in the bag filter 22 is brushed off the bag filter 22 by the pressurized air Ab injected from the injection device 30. Such a dust collector 4 employs a brushing method known as the pulse jet method. However, the dust collector 4 may also employ a brushing method other than the pulse jet method (for example, a pulsating back pressure method that imparts a pulsating airflow to the backwash air).

[0019] The transport line 6 connects the dust collector 4 and the absorption tower 2. In other words, the transport line 6 connects the containment chamber 21 and the internal space 3. This transport line 6 is configured to transport the adsorbent powder P collected by the dust collector 4 toward the absorption tower 2. In one embodiment, the inlet 6a of the transport line 6 is formed on the side surface 32 of the filter casing 20. This inlet 6a of the transport line 6 is formed on the side surface 32 below the bag filter 22. The outlet 6b of the transport line 6 communicates with the internal space 3 of the absorption tower 2. The outlet 6b of the transport line 6 is located above the supply port 5. The transport line 6 is configured to transport the adsorbent powder P toward the absorption tower 2 by the drive of a fan 12, which will be described later. In some embodiments, the transport line 6 is configured to extend downward from the inlet 6a toward the outlet 6b. With such a configuration, the adsorbent powder P can be smoothly transported within the transport line 6 with the support of gravity.

[0020] The heating device 8 is configured to heat the adsorbent powder P conveyed in the conveyance line 6. In one embodiment, the heating device 8 is provided in the conveyance line 6 and is configured to heat the adsorbent powder P in a batch manner. That is, the heating device 8 includes an inlet through which the adsorbent powder P is introduced and an outlet through which the adsorbent powder P is discharged, and each of the inlet and the outlet is configured to be openable and closable. The heating device 8 closes the inlet and the outlet to seal the internal space, and then heats the adsorbent powder P in the internal space. By this heating, the adsorbent powder P that has adsorbed CO2 regenerates by separating the CO2. The heating device 8 is configured to discharge the CO2 separated from the adsorbent powder P by heating to the outside. The heating method by the heating device 8 is not particularly limited, and it may be indirect heating or direct heating.

[0021] The humidifying device 10 is provided on the downstream side of the conveyance line 6 (on the side of the absorption tower 2) with respect to the heating device 8. The humidifying device 10 is configured to humidify the adsorbent powder P from which CO2 has been separated by the heating of the heating device 8. Specifically, the humidifying device 10 supplies water into the conveyance line 6 to moisten the adsorbent powder P. The moistened adsorbent powder P is supplied into the internal space 3 of the absorption tower 2 through the outlet 6b of the conveyance line 6.

[0022] The fan 12 is provided on the upstream side of the conveyance line 6 (on the side of the dust collector 4) with respect to the heating device 8. By driving the fan 12, the adsorbent powder P is sucked from the storage chamber 21 into the conveyance line 6 together with the air A. Then, the adsorbent powder P flows through the inside of the conveyance line 6 together with the air A toward the internal space 3 of the absorption tower 2.

[0023] (Function and Effect) The operation and effects of a CO2 removal device 1 according to one embodiment will be described. According to one embodiment, by circulating the adsorbent powder P together with air A into the internal space 3 of the absorption tower 2 and into the containment chamber 21 of the filter casing 20, it becomes easy to keep the adsorbent powder P in the CO2 removal device 1 for a certain period of time or longer. As a result, the amount of CO2 adsorbed by the adsorbent powder P from the air A can be increased. In some embodiments, the CO2 removal device 1 further includes an air circulation device (e.g., a fan or a vacuum pump) for circulating air A to the absorption tower 2 and the dust collector 4, respectively.

[0024] In one embodiment, the adsorbent powder P that has adsorbed CO2 returns to the absorption tower 2 through the transport line 6 and is regenerated by heating in the heating device 8. As a result, the regenerated adsorbent powder P can re-adsorb CO2 contained in the air A. In other words, the amount of adsorbent powder P supplied from the supply device 14 can be reduced. Furthermore, since a carrier to support the adsorbent powder P is not required, the heat energy supplied from the heating device 8 is not taken away by the carrier (the carrier is not heated), and the heat energy required to separate CO2 from the adsorbent powder P can be suppressed. As a result, running costs can be reduced.

[0025] In order to regenerate the adsorbent powder P that has adsorbed CO2 by heating it, it is necessary to ensure a certain amount of heating time. According to one embodiment, a batch-type heating method is applied to the heating device 8, so that a large amount of adsorbent powder P can be regenerated at once while suppressing an increase in the size of the heating device 8. However, this disclosure is not limited to a batch-type heating device 8. In some embodiments, the heating device 8 is configured to heat the adsorbent powder P as it flows through the conveyor line 6.

[0026] When the adsorbent powder P is heated and regenerated, moisture is separated along with CO2, which may result in low CO2 adsorption performance by the regenerated adsorbent powder P. In one embodiment, a humidifier 10 is provided so that the regenerated adsorbent powder P is moistened before being returned to the internal space 3 of the absorption tower 2. This improves the CO2 adsorption performance of the regenerated adsorbent powder P. In another embodiment, a fan 12 is provided so that the adsorbent powder P can be introduced into the transport line 6 along with air A, and also released into the absorption tower 2 along with air A.

[0027] According to one embodiment, the dust collector 4 includes a filter casing 20 and a bag filter 22, so that a dust collector 4 capable of efficiently collecting adsorbent powder P can be provided. However, this disclosure is not limited to the form of dust collector 4 illustrated in Figure 1 (bag filter). In some embodiments, the dust collector 4 is an electrostatic precipitator that collects dust by charging the particles of adsorbent powder P with corona discharge and attaching them to positively and negatively charged attachment surfaces by electrical attraction. In some embodiments, the dust collector 4 is a cyclone dust collector that separates the adsorbent powder P by centrifugal separation.

[0028] According to one embodiment, since the floor surface 26 of the filter casing 20 includes an inclined portion 28, the adsorbent powder P brushed off from the bag filter 22 can be guided to the conveyor line 6. If the volume of the clumps of PM is large, it may be difficult to heat the clumps of PM with the heating device 8. According to one embodiment, since a discharge hole 27 is formed in the floor surface 26 of the filter casing 20, clumps of adsorbent powder P unsuitable for regeneration are discharged to the outside of the dust collector 4 through the discharge hole 27. This suppresses the supply of clumps of PM to the conveyor line 6 and suppresses a decrease in regeneration efficiency. According to one embodiment, since an inlet 6a for the conveyor line 6 is formed on the side surface 32 of the filter casing 20, adsorbent powder P or small clumps of adsorbent powder P that are small in volume and suitable for regeneration can be supplied to the conveyor line 6, improving regeneration efficiency.

[0029] <Combustion equipment> Figure 2 is a schematic diagram showing the configuration of a combustion facility 100 equipped with a CO2 removal device 1 according to one embodiment. As shown in Figure 2, the combustion facility 100 includes a CO2 removal device 1, a combustion device 102, a generator 104, a boiler 106, a CO2 recovery device 130, and a processing device 140.

[0030] The combustion device 102 is configured to receive CO2-removed air A1, which is air A from which CO2 has been removed by the CO2 removal device 1. In other words, in the direction in which the combustion air of the combustion equipment 100 flows, the CO2 removal device 1 is located upstream of the combustion device 102. In one embodiment, the combustion device 102 is a gas turbine 102A (102), which includes a compressor 110, a combustor 112, and a turbine 114. The generator 104 is connected to the turbine 114. In the embodiment illustrated in Figure 2, the gas turbine 102A is a single-shaft gas turbine, and the compressor 110 and the turbine 114 are connected by a connecting shaft 116 and configured to rotate as a single unit. The turbine 114 and the generator 104 are connected via the connecting shaft 116, and the generator 104 is driven by the turbine 114 to generate electricity.

[0031] The compressor 110 compresses the CO2-removed air A1 supplied from the CO2 removal device 1 to produce compressed air A2, and supplies this compressed air A2 to the combustor 112. The combustor 112 mixes the compressed air A2 supplied from the compressor 110 with fuel F and burns it to produce combustion gas G1. The combustion gas G1 produced in the combustor 112 flows into the turbine 114 and drives the turbine 114. This drives the compressor 110 and the generator 104 connected to the turbine 114, and the generator 104 generates electricity. The combustion gas G1 that has passed through the turbine 114 is supplied to the boiler 106 as exhaust gas G2 of the gas turbine 102A.

[0032] The boiler 106 is configured to generate steam S using the heat from the exhaust gas G2 discharged from the gas turbine 102A. In the configuration illustrated in Figure 2, the boiler 106 is a waste heat recovery boiler that generates steam S by evaporating boiler feedwater W through heat exchange with the exhaust gas G2. In the configuration illustrated in Figure 2, the combustion equipment 100 further includes a steam turbine 118 driven by the steam S supplied from the boiler 106, which is connected to a generator 104 via a connecting shaft 116. Such a combustion equipment 100 is configured to recover the energy of the steam S by generating electricity using the steam S produced in the boiler 106. The exhaust gas G2 that has passed through the boiler 106 is discharged from the chimney 120. The steam S discharged from the steam turbine 118 is returned to water by the condenser 122 and used as boiler feedwater W.

[0033] The heating device 8 of the CO2 removal device 1 is configured to heat the adsorbent powder P using steam S generated in the boiler 106 as a heat source. In the embodiment illustrated in Figure 2, the combustion equipment 100 is configured to extract a portion of the steam S supplied to the steam turbine 118 (hereinafter referred to as heat source steam Sh) and supply the heat source steam Sh to the CO2 removal device 1. Specifically, the combustion equipment 100 includes an extraction line 124 that connects the steam line through which the steam S supplied to the steam turbine 118 flows to the CO2 removal device 1. This extraction line 124 is configured to allow the heat source steam Sh to flow toward the CO2 removal device 1. The heating device 8 indirectly heats the adsorbent powder P without bringing the heat source steam Sh into contact with the adsorbent powder P. In some embodiments, the fan 12 of the CO2 removal device 1 is configured to be driven by electricity generated by the generator 104.

[0034] The CO2 recovery device 130 recovers CO2 from the combustion gas G1. In the embodiment illustrated in Figure 2, the CO2 recovery device 130 recovers CO2 from the exhaust gas G2 flowing from the boiler 106 to the chimney 120 and discharges gaseous CO2 (referred to as the first CO2 gas CG1). The configuration of the CO2 recovery device 130 is not particularly limited, but for example, it may include an absorption tower that absorbs CO2 by bringing an absorbent liquid for CO2 absorption into contact with the exhaust gas G2, and a regeneration tower that heats the absorbent liquid that has absorbed CO2 in the absorption tower to separate and discharge the CO2.

[0035] The processing unit 140 is configured to process the CO2 recovered by the CO2 recovery unit 130 together with the CO2 removed by the CO2 removal unit 1. In the embodiment illustrated in Figure 2, the combustion equipment 100 includes a confluence line 150 for confluence with the gaseous CO2 (referred to as the second CO2 gas CG2) removed by the CO2 removal unit 1, which is supplied to the processing unit 140. Therefore, the processing unit 140 is supplied with both the first CO2 gas CG1 and the second CO2 gas CG2. The processing unit 140 is, for example, a compressor that compresses the first CO2 gas CG1 and the second CO2 gas CG2 together. With this configuration, the CO2 in the atmosphere and the CO2 generated by the combustion of carbon-containing fuel in the combustion equipment 102 can be efficiently compressed together, and the overall configuration of the combustion equipment 100 can be simplified.

[0036] In the configuration illustrated in Figure 2, by positioning the CO2 removal device 1 upstream of the gas turbine 102A, air A can be circulated to the CO2 removal device 1 using the intake air from the gas turbine 102A. Therefore, it is not necessary to provide an air circulation device such as a fan or vacuum pump in the CO2 removal device 1. Note that the combustion device 102 is not limited to the gas turbine 102A. The combustion device 102 may be a boiler or incinerator equipped with a ventilation device (e.g., a fan) for ventilating intake or exhaust air. The gas turbine 102A is particularly suitable for the installation of the CO2 removal device 1 compared to other combustion devices such as boilers and incinerators due to its large airflow capacity.

[0037] In the embodiment illustrated in Figure 2, the combustion equipment 100 is a power generation facility employing a gas turbine combined cycle including a steam turbine 118 and a boiler 106 (heat recovery boiler; HRSG), but the disclosure is not limited to this embodiment. The combustion equipment 100 may also be a facility employing a simple cycle in which exhaust gas G2 flows directly from the turbine 114 to the CO2 recovery device 130, without including a steam turbine 118 and a boiler 106.

[0038] According to the embodiment illustrated in Figure 2, the heating device 8 heats the adsorbent powder P using the heat source steam Sh as a heat source, so the heating device 8 itself does not need to generate the thermal energy required to heat the adsorbent powder P.

[0039] This disclosure is not limited to the configuration of the combustion equipment 100 as illustrated in Figure 2. Figure 3 is a schematic diagram showing an example of a configuration of the combustion equipment 100 different from that in Figure 2. As illustrated in Figure 3, the combustion equipment 100 includes a CO2 removal device 1, a combustion device 102, a generator 104, a boiler 106, a steam turbine 118, a chimney 120, a CO2 recovery device 130, a processing device 140, and a heater 160. The components of the combustion equipment 100 illustrated in Figure 3 that are the same as those of the combustion equipment 100 illustrated in Figure 2 (CO2 removal device 1, combustion device 102, generator 104, boiler 106, steam turbine 118, chimney 120, CO2 recovery device 130, and processing device 140) are denoted by the same reference numerals, and their detailed descriptions are omitted.

[0040] In the configuration illustrated in Figure 3, the combustion device 102 is an incinerator 102B (102). The incinerator 102B is positioned downstream of the CO2 removal device 1 in the direction in which the combustion air of the combustion equipment 100 flows, so that CO2-removed air A1 is introduced. The boiler 106 generates steam S using the heat of the exhaust gas Gx discharged from the incinerator 102B. The CO2 recovery device 130 recovers CO2 from the exhaust gas Gx of the incinerator 102B heading from the boiler 106 towards the chimney 120 and discharges the first CO2 gas CG1.

[0041] The heater 160 heats the CO2-removed air A1. The CO2-removed air A1 heated by the heater 160 is introduced into the incinerator 102B. In the configuration illustrated in Figure 3, the heater 160 is an air preheater 160A(160), which heats the CO2-removed air A1 flowing toward the incinerator 102B with the heat from the exhaust gas Gx of the incinerator 102B flowing from the boiler 106 toward the CO2 recovery device 130.

[0042] In the configuration illustrated in Figure 3, the combustion equipment 100 further includes a heated air line 162 for extracting a portion of the CO2-removed air A1 heated by the heater 160 and supplying it to the CO2 removal device 1. Such a heated air line 162 is, for example, a pipe connecting the air supply piping that connects the air preheater 160A and the incinerator 102B and the CO2 removal device 1.

[0043] According to the combustion equipment 100 illustrated in Figure 3, CO2-removed air A1 heated by the air preheater 160A is introduced into the incinerator 102B, thereby improving the combustion efficiency in the incinerator 102B. According to the combustion equipment 100 illustrated in Figure 3, a portion of the CO2-removed air A1 heated by the air preheater 160A is supplied to the CO2 removal device 1 via the heated air line 162. In other words, the heating device 8 heats the adsorbent powder P using the exhaust gas Gx of the incinerator 102B as a heat source, so the heating device 8 itself does not need to generate the thermal energy required to heat the adsorbent powder P.

[0044] The contents described in each of the above embodiments can be understood, for example, as follows:

[0045] [1] The CO2 removal device (1) relating to this disclosure is A CO2 removal device that removes CO2 from gas (A), An absorption tower (2) is configured such that the gas is introduced into the internal space (3), and adsorbent powder (P) is scattered into the internal space to adsorb CO2 contained in the gas onto the adsorbent powder, A dust collector (4) configured to collect the adsorbent powder from the gas that has passed through the absorption tower, A transport line (6) is configured to connect the dust collector and the absorption tower, and to transport the adsorbent powder collected by the dust collector toward the absorption tower, The system includes a heating device (8) configured to heat the adsorbent powder being transported in the transport line.

[0046] According to the configuration described in [1] above, the adsorbent powder that has adsorbed CO2 returns to the absorption tower through the transport line and is regenerated by heating in the heating device. As a result, the regenerated adsorbent powder can re-adsorb CO2 contained in the gas. Furthermore, since a carrier to support the adsorbent powder is not required, the heat energy supplied from the heating device to the carrier is not taken away (the carrier is not heated), and the heat energy required to separate CO2 from the adsorbent powder can be suppressed. As a result, running costs can be reduced.

[0047] [2] In some embodiments, in the configuration described in [1] above, The heating device is installed in the transport line and is configured to heat the adsorbent powder in a batch manner.

[0048] In order to regenerate the adsorbent powder that has adsorbed CO2 by heating it, it is necessary to ensure a certain amount of heating time. According to the configuration described in [2] above, batch heating is applied, so a large amount of adsorbent powder can be regenerated at once while suppressing an increase in the size of the heating device.

[0049] [3] In some embodiments, in the configuration described in [2] above, The system further includes a humidifier (10) provided downstream of the heating device in the transport line and configured to humidify the adsorbent powder.

[0050] According to the configuration described in [3] above, the CO2 adsorption performance of the recycled adsorbent powder can be improved.

[0051] [4] In some embodiments, in the configuration described in any one of [1] to [3] above, The dust collector includes a filter casing (20) having a containment chamber (21) through which the gas flows, and a bag filter (22) contained in the containment chamber and collecting the adsorbent powder from the gas flowing through the containment chamber.

[0052] According to the configuration described in [4] above, a dust collector capable of efficiently collecting adsorbent powder can be provided.

[0053] [5] In some embodiments, in the configuration described in [4] above, The floor surface (26) of the filter casing includes an inclined portion (28) that slopes downward toward the entrance (6a) of the transport line.

[0054] According to the configuration described in [5] above, the adsorbent powder brushed off the bag filter can be guided to the transport line.

[0055] [6] In some embodiments, in the configuration described in [4] or [5] above, Discharge holes (27) are formed in the floor surface (26) of the filter casing for discharging clumps (PM) formed by the bonding of multiple adsorbent powders together.

[0056] According to the configuration described in [6] above, it is possible to suppress the supply of clumps of adsorbent powder unsuitable for regeneration to the conveyor line, thereby suppressing a decrease in regeneration efficiency.

[0057] [7] In some embodiments, in the configuration described in any one of [4] to [6] above, An inlet (6a) for the transport line is formed in the portion of the side surface (32) of the filter casing below the bag filter.

[0058] According to the configuration described in [7] above, adsorbent powder or small lumps of adsorbent powder suitable for regeneration can be supplied to the transport line, thereby improving regeneration efficiency.

[0059] [8] In some embodiments, in the configuration described in any one of [1] to [7] above, The system further includes a fan (12) located upstream of the heating device in the conveying line.

[0060] According to the configuration described above [8], the adsorbent powder can be introduced into the transport line together with the gas and discharged into the absorption tower together with the gas.

[0061] [9] The combustion equipment (100) relating to this disclosure is A CO2 removal device (1) described in any one of the above [1] to [8], The system includes a combustion device (102) configured to introduce the gas (A1) from which CO2 has been removed by the CO2 removal device.

[0062] According to the configuration described in [9] above, the gas can be circulated to the CO2 removal device by utilizing the intake air to the combustion device. Therefore, it is not necessary to provide a separate device for circulating the gas to the CO2 removal device.

[0063]

[10] In some embodiments, in the configuration described in [9] above, The system further comprises a boiler (106) configured to generate steam (S) using the heat of the combustion gas (G1) discharged from the combustion device, The heating device is configured to heat the adsorbent powder using the steam generated in the boiler as a heat source.

[0064] According to the configuration described in

[10] above, the heating device itself does not need to generate the thermal energy required to heat the adsorbent powder.

[0065]

[11] In some embodiments, in the configuration described in [9] or

[10] above, The combustion device is a gas turbine (102A).

[0066] According to the configuration described above

[11] , the gas turbine has a much larger airflow capacity compared to other combustion devices such as boilers and incinerators. Therefore, by utilizing the intake air to the gas turbine, the amount of CO2 removed can be increased.

[0067]

[12] In some embodiments, in the configuration described in any one of [9] to

[11] above, The system further includes a processing apparatus configured to process the CO2 removed by the CO2 removal apparatus together with CO2 recovered from the combustion gas discharged from the combustion apparatus.

[0068] According to the configuration described in

[12] above, by using the processing device, it is not necessary to provide a separate device for processing the CO2 removed by the CO2 removal device.

[0069]

[13] In some embodiments, in the configuration described in any one of [9] to

[12] above, The system further includes a heater (160) for heating the CO2-removed air (A1), which is the gas from which CO2 has been removed by the CO2 removal device. The combustion apparatus is configured to introduce the CO2-removed air heated by the heater.

[0070] According to the configuration described in

[13] above, the combustion efficiency of the combustion device can be improved.

[0071]

[14] In some embodiments, in the configuration described in

[13] above, The heater is an air preheater (160A) that heats the CO2-removed air with exhaust gas (Gx) discharged from the combustion device, The system further includes a heated air line (162) for extracting a portion of the CO2-removed air heated by the heater and supplying it to the CO2 removal device 1.

[0072] According to the configuration described in

[14] above, the heating device itself does not need to generate the thermal energy required to heat the adsorbent powder. [Explanation of Symbols]

[0073] 1 CO2 removal device 2. Absorption Tower 3. Interior space 3a Entrance to the interior space 3b Exit of the interior space 4. Dust collector 5 supply ports 6 Conveyor Line 6a Entrance to the conveyor line 6b Outlet of the conveyor line 8 Heating device 10 Humidifier 12 Fans 14 Feeding device 16 Expanded diameter part 20 Filter casings 21 Confinement Chambers 22 Bug Filter 24 connection lines 25 Exhaust vents 26. The floor surface of the filter casing. 27 Discharge hole 28 Slope 30 Injector 32 Side view of the filter casing 100 Combustion equipment 102 Combustion device 102A Gas Turbine 104 Generator 106 Boiler 110 Compressor 112 Combustor 114 Turbine 116 Connecting shaft 118 Steam Turbine 120 Chimney 122 Condenser 130 CO2 recovery device 140 Processing Units 160 Heater 160A Air Preheater 162 Heated air line A air A1 CO2-removed air A2 Compressed air Ab Pressurized air D1 Vertical direction F fuel G1 Combustion Gas G2 exhaust gas P adsorbent powder S Steam Sh Steam for heat source W Boiler Feedwater

Claims

1. A CO2 removal device that removes CO2 from a gas, An absorption tower is configured such that the gas is introduced into the internal space, and adsorbent powder is scattered into the internal space to adsorb CO2 contained in the gas onto the adsorbent powder, A dust collector configured to collect the adsorbent powder from the gas that has passed through the absorption tower, A conveying line is configured to connect the dust collector and the absorption tower, and to convey the adsorbent powder collected by the dust collector toward the absorption tower, The system includes a heating device configured to heat the adsorbent powder being transported in the transport line, CO2 removal device.

2. The heating device is provided on the transport line and is configured to heat the adsorbent powder in a batch manner. The CO2 removal apparatus according to claim 1.

3. The system further includes a humidifier provided downstream of the heating device in the transport line, configured to humidify the adsorbent powder. The CO2 removal apparatus according to claim 2.

4. The dust collector includes a filter casing having a containment chamber through which the gas flows, and a bag filter contained in the containment chamber that collects the adsorbent powder from the gas flowing through the containment chamber. A CO2 removal apparatus according to any one of claims 1 to 3.

5. The floor surface of the filter casing includes an inclined portion that slopes downward toward the entrance of the conveying line. The CO2 removal apparatus according to claim 4.

6. The bottom surface of the filter casing has discharge holes formed for discharging clumps in which multiple adsorbent powders have bonded together. The CO2 removal apparatus according to claim 4.

7. The portion of the side of the filter casing below the bag filter has an inlet for the transport line. The CO2 removal apparatus according to claim 4.

8. The system further includes a fan located upstream of the heating device in the conveying line. The CO2 removal apparatus according to claim 1.

9. A CO2 removal device according to any one of claims 1 to 3, The combustion apparatus comprises a combustion apparatus configured to introduce the gas from which CO2 has been removed by the CO2 removal device, Combustion equipment.

10. The boiler is further configured to generate steam using the heat of the combustion gas discharged from the aforementioned combustion device. The heating device is configured to heat the adsorbent powder using the steam generated in the boiler as a heat source. The combustion apparatus according to claim 9.

11. The aforementioned combustion device is a gas turbine. The combustion apparatus according to claim 9.

12. The apparatus further comprises a processing device configured to process the CO2 removed by the CO2 removal device together with CO2 recovered from the combustion gas discharged from the combustion device. The combustion apparatus according to claim 9.

13. The system further includes a heater for heating the CO2-removed air, which is the gas from which CO2 has been removed by the CO2 removal device. The combustion apparatus is configured to introduce the CO2-removed air heated by the heater. The combustion apparatus according to claim 9.

14. The heater is an air preheater that heats the CO2-removed air with exhaust gas discharged from the combustion device. The system further includes a heated air line for extracting a portion of the CO2-removed air heated by the heater and supplying it to the CO2 removal device 1. The combustion apparatus according to claim 13.

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