CN115162464A - Carbon dioxide and fresh water capturing system and capturing method thereof - Google Patents

Abstract

The invention provides a carbon dioxide and fresh water capture system and its capture method. The system includes an adsorption fan, a water adsorption rotor, a first condenser, a carbon adsorption rotor, an air heater, a first regeneration fan, and a second regeneration fan. The fan, the second condenser, the water storage tank and the gas cylinder, the water adsorption runner and the carbon adsorption runner are divided into an adsorption area and a regeneration area. The ambient air in the present invention passes through the adsorption fan, the water adsorption runner adsorption area, The first condenser, the carbon adsorption rotor adsorption zone, the air heater, the first regeneration fan, the carbon adsorption rotor regeneration zone, the second regeneration fan and the water adsorption rotor regeneration zone finally form high-carbon steam, and the high-carbon steam passes through the The condenser is condensed, and the water and carbon dioxide are stored in the water storage tank and the gas storage cylinder respectively. The present invention proposes a system for the first time to directly capture the air for both water and carbon dioxide, thereby realizing an uninterrupted capture and regeneration process. And the system structure is simple and easy to use.

Description

A carbon dioxide and fresh water capture system and its capture method

technical field

The invention belongs to the technical field of capturing carbon dioxide and water, and particularly relates to a capturing system for carbon dioxide and fresh water and a capturing method thereof.

Background technique

In recent years, the massive burning of fossil fuels has increased the concentration of carbon dioxide in the air, leading to an increasingly serious global warming problem. In addition to reducing carbon dioxide emissions, carbon capture is also key to achieving "carbon peaking" and "carbon neutrality" goals. Traditional carbon capture models, such as pre-combustion and post-combustion capture from coal-fired power plants, can slow the rise in atmospheric CO2 concentrations, but only capturing CO2 directly from the air can actually significantly reduce airborne CO2 concentrations "Negative Carbon Technology".

Due to the contradiction between the limited freshwater resources and the population explosion, water shortage has always been a serious crisis facing human beings. The air-harvesting technology, which can directly capture fresh water from the air, has little dependence on geographical water resources, and is a promising technology.

SUMMARY OF THE INVENTION

In view of the defects of carbon dioxide capture technology and air water intake, the present invention provides an adsorption runner type direct air carbon dioxide and fresh water combined capture system and method thereof, so as to realize all-weather fast capture of carbon dioxide and fresh water in the air.

The technical scheme of the present invention is as follows:

A carbon dioxide and fresh water capture system, including a fan, a condenser, a runner, an air heater, a water storage tank and a gas cylinder, the fan includes an adsorption fan and a regeneration fan, and the regeneration fan includes a first regeneration fan and a second regeneration fan; the condenser includes a first condenser and a second condenser; the runner includes a water adsorption runner and a carbon adsorption runner, and both the water adsorption runner and the carbon adsorption runner are an electric motor for providing power is provided, and the inside of the water adsorption runner and the carbon adsorption runner both include an adsorption zone and a regeneration zone;

The adsorption fan, the adsorption zone of the water adsorption rotor, the first condenser, the adsorption zone of the carbon adsorption rotor, the air heater, the first regeneration fan, the regeneration zone of the carbon adsorption rotor, the second regeneration fan, the water adsorption The regeneration area of the runner and the second condenser are arranged in sequence in the air passage, and the second condenser is respectively connected to the water storage tank and the gas storage bottle through pipes.

Further, both the adsorption zone and the regeneration zone in the water adsorption runner are provided with a water adsorbent, and both the adsorption zone and the regeneration zone in the carbon adsorption runner are provided with a carbon dioxide adsorbent.

Further, the water adsorbent is a mixture of one or more of salt-based composite materials, porous materials, hydrogels, and metal-organic framework materials.

Further, the carbon dioxide adsorbent is a mixture of one or more of amine-functionalized porous materials, amine-functionalized resins and metal organic framework materials.

Further, the area ratio of the adsorption zone to the regeneration zone in the water adsorption rotor and the carbon adsorption rotor is 1:1-3:1.

A capture method for a carbon dioxide and fresh water capture system, comprising the following steps:

S1: Turn on the power, the motor, fan and air heating machine start to run;

S2: The ambient air is supplied by the adsorption fan in sequence, the adsorption area of the water adsorption runner performs water adsorption, the first condenser performs cooling, the adsorption area of the carbon adsorption runner performs carbon adsorption, the air heater performs heating, and the first regeneration fan Air supply, carbon regeneration in the regeneration area of the carbon adsorption runner, air supply by the second regeneration fan, water regeneration in the regeneration area of the water adsorption runner to form high-carbon steam, and the second condenser condenses the high-carbon steam. The water and carbon dioxide enter the water storage tank and the gas storage cylinder respectively for storage.

Compared with the prior art, the beneficial effects of the present invention are mainly reflected in:

1. The adsorption runner type direct air carbon dioxide and fresh water combined capture system of the present invention uses the runner to directly capture carbon dioxide and moisture in the air, and uses high-temperature air to regenerate the adsorbent under negative pressure. The fixed bed type trapping device has high flexibility, small gas flow pressure drop, and temperature cascade utilization of regeneration gas, which can effectively improve energy utilization efficiency.

2. The present invention proposes for the first time a system to directly capture water and carbon dioxide in the air, which realizes an uninterrupted capture and regeneration process, and the system has a simple structure and is easy to use; compared with the traditional single carbon dioxide capture or air Water intake device, this device uses the principle of temperature swing adsorption to realize the rapid combined capture of carbon dioxide and moisture directly from the air, which greatly expands the use boundary of the two technologies. The mixed gas can be condensed to separate water and carbon dioxide to obtain high-purity carbon dioxide gas and relatively pure fresh water, so that the two can be used or stored to achieve low-energy consumption driven high-efficiency fresh water in the whole scene with complementary materials and energy. and carbon dioxide acquisition.

3. The present invention uses the adsorption material with good adsorption kinetic performance, the rotor rotates at a suitable speed, the adsorbent passing through the adsorption zone can reach the state of re-adsorption saturation, and the adsorbent passing through the regeneration zone can return to the adsorption zone. The regeneration and activation have been completed before, so it can meet the requirements of runner-type continuous capture.

Description of drawings

Fig. 1 is the structure diagram of a kind of carbon dioxide and fresh water capture system of the present invention;

Fig. 2 is the structure diagram of the runner of the present invention.

Among them, 1, adsorption fan; 2, water adsorption rotor; 3, first condenser; 4, carbon adsorption rotor; 5, air heater; 6, first regeneration fan; 7, second regeneration fan; 8, first 2. Condenser; 9. Water storage tank; 10. Gas storage cylinder; 11. Electric motor; 12. Adsorption zone; 13. Regeneration zone.

Detailed ways

A carbon dioxide and fresh water capture system and a capture method thereof of the present invention will be described in more detail below in conjunction with schematic diagrams, wherein preferred embodiments of the present invention are shown, and it should be understood that those skilled in the art can modify the present invention described herein , and still achieve the advantageous effects of the present invention, therefore, the following description should be construed as widely known to those skilled in the art, rather than as a limitation of the present invention.

Referring to Figures 1 and 2, a carbon dioxide and fresh water capture system includes an adsorption fan 1, a water adsorption rotor 2, a first condenser 3, a carbon adsorption rotor 4, an air heater 5, and a first regeneration fan 6 , the second regeneration fan 7, the second condenser 8, the water storage tank 9 and the gas storage cylinder 10, wherein, the water adsorption runner 2 and the carbon adsorption runner 4 are equipped with a motor 11, and the motor 11 drives the water adsorption runner. 2 and the carbon adsorption wheel 4 rotate, and the rotation may be a constant speed rotation or a variable speed rotation. The interiors of the water adsorption runner 2 and the carbon adsorption runner 4 are divided into an adsorption zone 11 and a regeneration zone 12, and the area ratio of the adsorption zone 11 and the regeneration zone 12 is 1:1-3:1.

The air heater 5 is used to heat the air fed into the carbon adsorption runner 4, and its heat source is one or more of electric energy, solar energy, geothermal energy and industrial waste heat.

Both the adsorption zone and the regeneration zone of the water adsorption rotor 2 are provided with a water adsorbent, and the water adsorbent is one or more of salt-based composite materials, porous materials, hydrogels, and metal-organic framework materials, such as impregnated lithium salts Silica gel, activated carbon fiber felt impregnated with lithium salt, PAM hydrogel, sodium alginate composite gel and MIL-101(Cr).

Both the adsorption zone and the regeneration zone of the carbon adsorption wheel 4 are provided with carbon dioxide adsorbents, and the carbon dioxide adsorbent is one or more of amine-functionalized porous materials, amine-functionalized resins, and metal-organic framework materials, such as polymer materials. Ethyleneimine impregnated silica gel and polyethyleneimine impregnated activated carbon fiber felt.

The present invention is a carbon dioxide and fresh water capture system, an adsorption fan 1, a water adsorption rotor 2, a first condenser 3, a carbon adsorption rotor 4, an air heater 5, a first regeneration fan 6, and a second regeneration fan 7 It is connected with the second condenser 8 through industrial ventilation pipes, and the second condenser 8 is respectively connected to the water storage tank 7 and the gas storage cylinder 10 through ppr thermoplastic pipes.

The operation method of a carbon dioxide and fresh water capture system of the present invention comprises the following steps:

When electrical energy is input to the device, the motor 11, the fan and the air heater 5 start to operate, and the ambient air is sent to the adsorption area of the water adsorption rotor 2 by the adsorption fan 1, so that the water in the ambient air is adsorbed by the water adsorbent, and the air The humidity in the air is reduced, and the treated air is sent to the first condenser 3 . The low-temperature and low-humidity air passing through the first condenser is sent to the adsorption area of the carbon adsorption rotor 4 , so that carbon in the air is adsorbed by the carbon dioxide adsorbent, and the treated air is sent to the air heater 5 .

During the regeneration process, the high-temperature air from the air heater 5 is induced by the first regeneration fan 6 to flow through the regeneration area of the carbon adsorption runner 4, and the carbon dioxide adsorbent is heated to desorb carbon dioxide for regeneration. The treated air is induced by the second regeneration fan 7 to flow through the regeneration area of the water adsorption runner 2, and the water adsorbent is heated to desorb the water for regeneration. After that, the high-carbon steam is condensed in the second condenser 8 and flows into the water storage tank 9 , and the carbon dioxide is collected and stored in the gas storage cylinder 10 .

During the operation of the carbon dioxide and fresh water capture system of the present invention, the criterion for judging the working conditions of the water adsorption runner 2 and the carbon adsorption runner 4 is whether the concentration of moisture and carbon dioxide in the air output to the environment is lower than the required value, and whether water and carbon dioxide are collected in the water storage tank 9 and the gas storage cylinder 10 after a certain period of time.

The above are only preferred embodiments of the present invention, and do not have any limiting effect on the present invention. Any person skilled in the art, within the scope of not departing from the technical solution of the present invention, makes any form of equivalent replacement or modification to the technical solution and technical content disclosed in the present invention, and does not depart from the technical solution of the present invention. content still falls within the protection scope of the present invention.

Claims (6)

1. a collection system of carbon dioxide and fresh water, is characterized in that, comprises fan, condenser, runner, air heater, water storage tank and gas cylinder, described fan comprises adsorption fan and regeneration fan, described regeneration The fan includes a first regeneration fan and a second regeneration fan; the condenser includes a first condenser and a second condenser; the runner includes a water adsorption runner and a carbon adsorption runner, the water adsorption runner and the The carbon adsorption runners are all provided with electric motors for providing power, and the interiors of the water adsorption runners and the carbon adsorption runners both include an adsorption zone and a regeneration zone; The adsorption fan, the adsorption zone of the water adsorption rotor, the first condenser, the adsorption zone of the carbon adsorption rotor, the air heater, the first regeneration fan, the regeneration zone of the carbon adsorption rotor, the second regeneration fan, the water adsorption The regeneration area of the runner and the second condenser are connected through ventilation pipes and are arranged in air passages in sequence, and the second condenser is respectively connected with the water storage tank and the gas storage bottle through pipes. 2 . The carbon dioxide and fresh water capture system according to claim 1 , wherein the adsorption zone and the regeneration zone in the water adsorption wheel are both provided with water adsorbents, and the adsorption in the carbon adsorption wheel Both the zone and the regeneration zone are provided with carbon dioxide adsorbents. 3. The carbon dioxide and fresh water capture system according to claim 2, wherein the water adsorbent is one or more of salt-based composite materials, porous materials, hydrogels, and metal organic framework materials mix. 4. The carbon dioxide and fresh water capture system according to claim 2, wherein the carbon dioxide adsorbent is one of an amine-functionalized porous material, an amine-functionalized resin, and a metal-organic framework material or Various mixes. 5 . The carbon dioxide and fresh water capture system according to claim 1 , wherein the area ratio of the adsorption zone to the regeneration zone in the water adsorption runner and the carbon adsorption runner is 1:1-3:1. 6 . 6. a capture method of carbon dioxide and fresh water capture system, using the capture system of carbon dioxide and fresh water as described in any one of claims 1-5, is characterized in that, comprises the steps: S1: Turn on the power, the motor, fan and air heating machine start to run; S2: The ambient air is supplied by the adsorption fan in sequence, the adsorption area of the water adsorption runner performs water adsorption, the first condenser performs cooling, the adsorption area of the carbon adsorption runner performs carbon adsorption, the air heater performs heating, and the first regeneration fan Air supply, carbon regeneration in the regeneration area of the carbon adsorption runner, air supply by the second regeneration fan, water regeneration in the regeneration area of the water adsorption runner to form high-carbon steam, and the second condenser condenses the high-carbon steam. The water and carbon dioxide enter the water storage tank and the gas storage cylinder respectively for storage.

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