Separation and utilization process of carbon dioxide

Abstract

The invention relates to the technical field of gas separation, in particular to a carbon dioxide separation and utilization process which comprises the following steps: separating carbon dioxide from air of a building or circulating air of the building, introducing the carbon dioxide into a carbon dioxide treatment section, extracting fluid from the carbon dioxide treatment section, and inputting the fluid into a separator for gas-liquid separation treatment, hydrogen is obtained; heat generated by hydrogen formation is subjected to liquid removal through a liquid remover, and removed water is introduced into electrolysis and then input into a front compressor for pressurization treatment; the pressurized hydrogen is directly input into mixed injection equipment for mixing treatment or input into dehydration and decarburization equipment for dehydration and decarburization treatment; the present invention has the advantages of improving the indoor air of any building by removing carbon dioxide therefrom, and also reducing the degree of air intake and ventilation in the building, thereby reducing the need for heating or cooling energy, and thus reducing the operating cost of ventilation.

Description

Technical Field

[0001] The present invention relates to the technical field of gas separation, and in particular to a process for separating and utilizing carbon dioxide. Background Art

[0002] In the prior art, various methods are known for separating and recovering carbon dioxide from gaseous materials or gaseous streams, and it is also known that carbon dioxide is harmful to health at high levels. The problem is that the level of carbon dioxide often increases in the indoor air of buildings. Moreover, in large cities, the level of carbon dioxide in the air is always very high, as well as outdoors.

[0003] The object of the present invention is to disclose a new method for separating carbon dioxide from the air of a building and for recovering and utilizing carbon dioxide. Furthermore, the object of the present invention is to disclose a method for reducing the level of carbon dioxide in a building and improving the quality of indoor air. Furthermore, the object of the present invention is to disclose a new device to improve the quality of indoor air. Furthermore, the object of the present invention is to disclose an energy-saving assembly for separating carbon dioxide from the air of a building and for utilizing the separated carbon dioxide. Summary of the invention

[0004] The technical problem to be solved by the present invention is the level of carbon dioxide in the indoor air of a building;

[0005] In order to solve the above technical problems, the present invention provides a technical solution: a process for separating and utilizing carbon dioxide, comprising the following steps:

[0006] Step S1: separating carbon dioxide from the air of a building or from the circulating air of a building, introducing the carbon dioxide into a carbon dioxide treatment section, and introducing the fluid produced in the carbon dioxide treatment section into a separator for gas-liquid separation treatment to obtain hydrogen;

[0007] Step S2: remove the heat generated by hydrogen formation by dehydrating the liquid, and introduce the removed water into electrolysis, and then input it into the front compressor for pressurization treatment;

[0008] Step S3: directly inputting the pressurized hydrogen into a mixing injection device for mixing treatment or inputting the pressurized hydrogen into a dehydration and decarbonization device for dehydration and decarbonization treatment;

[0009] Step S4: After hydrogen is dehydrated and decarbonized, carbon dioxide is separated, and the carbon dioxide is input into a supercritical compressor for pressurization, and then input into a mixing injection device for mixing treatment;

[0010] Step S5: introducing the mixed gas in step S3 or step S4 into the air of the building or the circulating air of the building,

[0011] As an improvement, in step 2, methane is formed in the carbon dioxide processing section, and the heat generated in the carbon dioxide processing section is introduced into the separation of carbon dioxide.

[0012] The carbon dioxide equipment comprises a separator, a liquid remover, a dehydration and decarbonization device, a compressor, and an electrolysis device; the separator is used to separate carbon dioxide from the air introduced into the building or from the circulating air of the building to reduce the carbon dioxide level in the indoor air of the building; the outlet of the separator is connected to the liquid remover, the outlet of the liquid remover is connected to the electrolysis device, the outlet of the electrolysis device is connected to the compressor, and the outlet of the compressor is connected to the decarbonization device, which comprises at least one processing device, and the processing device processes carbon dioxide through hydrogen to form compounds.

[0013] As an improvement, the carbon dioxide equipment further comprises at least a device for arranging the treated air as indoor air of a building.

[0014] As an improvement, in the carbon dioxide equipment, the electrolysis device is used to form hydrogen from water.

[0015] The advantages of the present invention over the prior art are that by means of the present invention, the indoor air of any building can be improved by removing carbon dioxide therefrom. The air introduced into the building can be treated with the apparatus of the present invention and the indoor air quality can be improved in large or small buildings. By means of the present invention, the indoor air in small locations can be cleaned flexibly and efficiently. By means of the present invention, the extent of air intake and ventilation in a building can also be reduced, thereby reducing the need for heating or cooling energy and thereby reducing the operating costs of ventilation. DETAILED DESCRIPTION

[0016] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] The present application fully explains the problems of the prior art in the technical background, and there are no superordinate or general problems. The problems to be solved by the present application are described in detail in the following invention content and specific implementation methods, the technical problems to be solved by the technical scheme are clarified, and it is determined that the technical scheme of the present application has beneficial effects relative to the objective prior art.

[0018] An embodiment provided by the present invention:

[0019] A process for separating and utilizing carbon dioxide comprises the following steps:

[0020] Step S1: separating carbon dioxide from the air of a building or from the circulating air of a building, introducing the carbon dioxide into a carbon dioxide treatment section, and introducing the fluid produced in the carbon dioxide treatment section into a separator for gas-liquid separation treatment to obtain hydrogen;

[0021] Step S2: The heat generated by the formation of hydrogen is removed by a deliquidator, the removed water is introduced into electrolysis, and then input into a front compressor for pressurization treatment; methane is formed in the carbon dioxide treatment section, and the heat generated in the carbon dioxide treatment section is introduced into the separation of carbon dioxide.

[0022] Step S3: directly inputting the pressurized hydrogen into a mixing injection device for mixing treatment or inputting the pressurized hydrogen into a dehydration and decarbonization device for dehydration and decarbonization treatment;

[0023] Step S4: After hydrogen is dehydrated and decarbonized, carbon dioxide is separated, and the carbon dioxide is input into a supercritical compressor for pressurization, and then input into a mixing injection device for mixing treatment;

[0024] Step S5: introducing the mixed gas in step S3 or step S4 into the air of the building or the circulating air of the building,

[0025] A carbon dioxide device comprises a separator, a liquid remover, a dehydration and decarbonization device, a compressor, and an electrolysis device; the separator is used to separate carbon dioxide from air introduced into a building or from the circulating air of the building to reduce the carbon dioxide level in the indoor air of the building; the outlet of the separator is connected to the liquid remover, the outlet of the liquid remover is connected to the electrolysis device, the outlet of the electrolysis device is connected to the compressor, the electrolysis device is used to form a hydrogen device from water, the outlet of the compressor is connected to the decarbonization device, and it comprises at least one processing device, and the processing device processes carbon dioxide by hydrogen to form a compound.

[0026] The carbon dioxide plant also comprises at least means for arranging the treated air as indoor air of a building.

[0027] In actual usage of the above structure, building is intended to refer to any real property or building, such as a residential building, industrial building, hall, office space, public building or other such buildings.

[0028] Air introduced into a building is intended to refer to any air introduced as indoor air of a building, wherein the air may be directly derived from the atmosphere, or the atmospheric air may be pre-treated in a particular manner before being introduced into the building. In one embodiment, the air is intended to refer to air flowing to a ventilation system (e.g., a mechanical ventilation system) of the building.

[0029] In this respect, air circulated in a building is intended to mean any recirculated air or exhaust air of the building that is circulated or returned as indoor air of the building. The portion of air circulated in the indoor air of the building may vary from 0 to 100%. In addition to separating carbon dioxide, the circulated air may be treated and / or cleaned, for example by removing water or moisture.

[0030] Separation of carbon dioxide from air can be carried out by means of any separation device, which is known in the art and suitable for the intended purpose; the separation device can be any separation or recovery device known in the art, wherein separation of carbon dioxide from air can be based on chemical methods, physical methods, absorption methods, dissolution methods, membrane methods, other suitable methods or combinations thereof. In one embodiment, separation of carbon dioxide from air can be carried out by a scrubber. In one embodiment, separation of carbon dioxide from air can be carried out by solid chemical active agents. As a feed device for feeding air into the separation device, any known device or equipment can be used, which is suitable for the intended purpose and is known in the art for guiding or sucking air into or through the separation device.

[0031] Carbon dioxide is separated from air introduced into a building and from circulating air of the building to reduce the level of carbon dioxide in the indoor air of the building; in one embodiment, the circulating air is air exhausted from the building and directed and mixed into the air introduced into the building before the separation stage, and carbon dioxide is separated from the mixture of air introduced into the building and circulating air of the building. In one embodiment, the circulating air is air exhausted from a building, carbon dioxide is separated therefrom, and the treated air is directed for use as indoor air of the building or mixed into indoor air introduced into the building; in one embodiment, carbon dioxide is separated from air introduced into the building; in one embodiment, carbon dioxide is separated from circulating air of the building;

[0032] adjusting the carbon dioxide level of air introduced for use as indoor air of a building to less than 800 ppm, in one embodiment less than 700 ppm, in one embodiment less than 600 ppm by separating the carbon dioxide; thereby, the carbon dioxide level in the indoor air of the building is at a level suitable for health; high levels of carbon dioxide in indoor air have a tiring effect on humans and reduce endurance;

[0033] In combination with the separation of carbon dioxide, water is removed from the air introduced into the building or from the circulating air of the building; thereby, the humidity of the indoor air of the building can be reduced; in one embodiment, the moisture is removed by heat, such as by a heat exchanger; the removed water can be recovered and utilized, or transported as waste water through a pipeline; in one embodiment, the water removed from the air can be introduced into hydrogen formation, such as electrolysis; in one embodiment, the device also includes at least one set of devices for removing water from the air introduced into the building or from the circulating air of the building in combination with the carbon dioxide separation device, and oxygen is introduced into the air introduced into the building or the circulating air of the building or the indoor air of the building in combination with or after the separation of carbon dioxide.

[0034] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the application disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope of the present application is indicated by the claims.

[0035] It should be understood that the present application is not limited to the above description, and various modifications and changes can be made without departing from its scope. The above-described embodiments of the present application do not constitute a limitation on the scope of protection of the present application.

Claims

1. A process for separation and utilization of carbon dioxide, characterized in that: The steps include: Step S1: separating carbon dioxide from the air of a building or from the circulating air of a building, introducing the carbon dioxide into a carbon dioxide treatment section, and introducing the fluid produced in the carbon dioxide treatment section into a separator for gas-liquid separation treatment to obtain hydrogen; Step S2: remove the heat generated by hydrogen formation by dehydrating the liquid, and introduce the removed water into electrolysis, and then input it into the front compressor for pressurization treatment; Step S3: directly inputting the pressurized hydrogen into a mixing injection device for mixing treatment or inputting the pressurized hydrogen into a dehydration and decarbonization device for dehydration and decarbonization treatment; Step S4: After hydrogen is dehydrated and decarbonized, carbon dioxide is separated, and the carbon dioxide is input into a supercritical compressor for pressurization, and then input into a mixing injection device for mixing treatment; Step S5: Introducing the mixed gas in step S3 or step S4 into the air of the building or the circulating air of the building.

2. A process for separation and utilization of carbon dioxide according to claim 1, characterized in that: In step 2, methane is formed in the carbon dioxide treatment section, and the heat generated in the carbon dioxide treatment section is introduced into the separation of carbon dioxide.

3. A carbon dioxide device according to claim 1, characterized in that: It includes a separator, a liquid remover, a dehydration and decarbonization device, a compressor, and an electrolysis device; the separator is used to separate carbon dioxide from the air introduced into the building or from the circulating air of the building to reduce the carbon dioxide level in the indoor air of the building; the outlet of the separator is connected to the liquid remover, the outlet of the liquid remover is connected to the electrolysis device, the outlet of the electrolysis device is connected to the compressor, and the outlet of the compressor is connected to the decarbonization device. It includes at least one processing device, and the processing device processes carbon dioxide by hydrogen to form compounds.

4. A carbon dioxide device according to claim 3, characterized in that: The carbon dioxide plant also comprises at least means for arranging the treated air as indoor air of a building.

5. The carbon dioxide device according to claim 3, characterized in that: The electrolysis device is used to generate hydrogen from water.