JP-2026075917-A - Carbon dioxide capture system and carbon dioxide capture method

Abstract

[Problem] To provide a carbon dioxide capture system and carbon dioxide capture method that can capture carbon dioxide more easily than capturing carbon dioxide from the air in the atmosphere. [Solution] The carbon dioxide recovery system 1 comprises an exhaust channel 20 for exhausting air from inside room R to the outside of room R, and a carbon dioxide recovery unit 30 disposed within the exhaust channel 20 for collecting carbon dioxide in the air exhausted from inside room R. The carbon dioxide recovery method includes the step of collecting carbon dioxide in the air exhausted from inside room R within the exhaust channel 20 for exhausting air from inside room R to the outside of room R. [Selection Diagram] Figure 1

Inventors

• 崔 原栄
• 阿波野 俊彦

Assignees

• 株式会社IHI

Dates

Publication Date

20260511

Application Date

20241023

Claims (7)

1. An exhaust passage that exhausts indoor air to the outside, A carbon dioxide recovery unit is located within the exhaust passage and collects carbon dioxide from the air exhausted from the room. A carbon dioxide capture system equipped with this feature.
2. The carbon dioxide recovery system according to claim 1, wherein the carbon dioxide recovery unit includes a solid adsorbent that adsorbs carbon dioxide from the air.
3. The carbon dioxide recovery system includes an intake passage for supplying air into the room. The carbon dioxide recovery system according to claim 1 or 2, wherein at least a portion of the air in the room is circulated through the intake passage and the exhaust passage.
4. The carbon dioxide recovery system according to claim 3, wherein a fan is provided in at least one of the intake air passage and the exhaust air passage.
5. The carbon dioxide recovery system according to claim 3, wherein the concentration of carbon dioxide passing through the intake port of the exhaust passage is higher than the concentration of carbon dioxide in the air passing through the intake passage.
6. The carbon dioxide recovery system according to claim 3, wherein the concentration of carbon dioxide passing through the intake port of the intake passage is greater than 400 ppm.
7. A carbon dioxide recovery method comprising the step of capturing carbon dioxide in the air exhausted from a room within an exhaust channel that exhausts indoor air to the outside.

Description

This disclosure relates to a carbon dioxide capture system and a carbon dioxide capture method. Carbon dioxide is a major concern as a cause of global warming, and efforts to curb the rise in carbon dioxide concentrations are spreading worldwide. One method proposed to reduce atmospheric carbon dioxide concentrations is a technology called Direct Air Capture (DAC). DAC is a technology that directly captures carbon dioxide from the air and is attracting attention as a measure to reduce carbon dioxide emissions into the atmosphere. Patent Document 1 discloses a DAC system comprising a first DAC device for recovering carbon dioxide from the atmosphere, and a second DAC device installed such that its intake port is located on the exhaust port side of the first DAC device, and which also recovers carbon dioxide from the atmosphere. Japanese Patent Publication No. 2024-088414 This is a schematic diagram showing a carbon dioxide capture system according to one embodiment.This is a schematic diagram illustrating an example of desorption of carbon dioxide from a carbon dioxide capture unit. Several exemplary embodiments will be described below with reference to the drawings. Note that the dimensional ratios in the drawings are exaggerated for illustrative purposes and may differ from actual proportions. Figure 1 is a schematic diagram showing a carbon dioxide recovery system 1 according to one embodiment. As shown in Figure 1, the carbon dioxide recovery system 1 comprises an intake passage 10, an exhaust passage 20, and a carbon dioxide recovery unit 30. This embodiment shows an example in which the carbon dioxide recovery unit 30 is applied to the exhaust passage 20 of building B. In this embodiment, building B has multiple rooms R. Building B includes an intake air passage 10 and an exhaust air passage 20, and each room R is connected to the intake air passage 10 and the exhaust air passage 20. Building B also has an air conditioning room ACR containing an air conditioning system AC, and the air is conditioned using a central control system. At least a portion of the air in each room R circulates through the intake air passage 10 and the exhaust air passage 20. Room R is a partitioned space within Building B, where people and animals such as pets are active. Combustion equipment such as gas fan heaters, oil fan heaters, cooking burners, and water heaters may be placed within Room R. Carbon dioxide is generated within Room R through animal respiration and the operation of combustion equipment. Therefore, the carbon dioxide concentration in the air within Room R may be higher than that of the air outside Room R. The intake passage 10 supplies air into room R. In this embodiment, the intake passage 10 is equipped with an intake fan F1 that supplies air into room R. The intake passage 10 has a first intake port 11, a plurality of outlet ports 12, and a second intake port 13. The first intake port 11 is located in the atmosphere outside building B, and air from the atmosphere is supplied to the intake passage 10 through the first intake port 11. The intake passage 10 is branched, and the plurality of outlet ports 12 are provided at the ends of the branched intake passage 10. The plurality of outlet ports 12 are located in each room R, and the air from the atmosphere drawn in from the first intake port 11 is supplied to each room R from the outlet ports 12. The second intake port 13 is located in the air conditioning room ACR, and the air from the air conditioning room ACR drawn in from the second intake port 13 is supplied to each room R from the outlet ports 12 through the intake passage 10. The exhaust passage 20 exhausts the air inside room R to the outside of room R. In this embodiment, the exhaust passage 20 is equipped with an exhaust fan F2 that exhausts the air inside room R to the outside of room R. Specifically, the exhaust passage 20 exhausts the air inside room R to the outside of building B. The exhaust passage 20 has a plurality of intake ports 21 and exhaust ports 22. The plurality of intake ports 21 are located in each room R, and the air taken in from each intake port 21 is supplied to the exhaust passage 20 via the intake ports 21. The exhaust port 22 is located in the air conditioning room ACR, and exhausts the air taken in from each room R through each intake port 21 into the air conditioning room ACR. Alternatively, the exhaust passage 20 may exhaust the air inside room R to the outside of building B through an exhaust port (not shown). Air conditioning equipment (AC) is equipment for harmonizing the air within a room (R) to create a comfortable indoor environment. Air conditioning equipment (AC) may include at least one of a temperature controller and a humidity controller. The temperature controller can regulate the temperature within the room. The humidity controller can regulate the humidity within the room. The temperature controller may include at least one of a heater and a cooler. The humi