CN116219449A - A system and method for hydrogen production, boiler oxygen-enriched combustion and carbon dioxide capture - Google Patents

Abstract

The invention discloses a system and method for hydrogen production, boiler oxygen-enriched combustion and carbon dioxide capture, including ion membrane electrolysis hydrogen production system, boiler oxygen-enriched combustion system and carbon dioxide capture system, wherein the ion membrane electrolysis hydrogen production system The oxygen outlet is connected to the inlet of the boiler oxygen-enriched combustion system, and the flue gas outlet of the boiler oxygen-enriched combustion system and the sodium hydroxide solution outlet and hydrochloric acid solution outlet of the ion membrane electrolysis hydrogen production system are connected to the inlet of the carbon dioxide capture system. The outlet of the collection system is connected with the inlet of the ionic membrane electrolysis hydrogen production system. The system and method can prepare hydrogen, oxygen and carbon dioxide capture agents, and at the same time realize hydrogen energy storage, boiler oxygen-enriched combustion and carbon dioxide capture, and realize traditional energy and Coupling application of new energy.

Description

A system and method for hydrogen production, boiler oxygen-enriched combustion and carbon dioxide capture

technical field

The invention belongs to the technical field of new energy hydrogen production, carbon dioxide capture and boiler oxygen-enriched combustion, and relates to a system and method for hydrogen production, boiler oxygen-enriched combustion and carbon dioxide capture.

Background technique

There are three main ways to capture carbon dioxide: pre-combustion capture, oxyfuel combustion, and post-combustion capture. Among them, oxygen-enriched combustion is based on the technical process of traditional thermal power generation, using a mixture of high-concentration oxygen (O ₂ ) and part of the flue gas (flue gas) to replace air, so that the obtained flue gas has a high concentration of CO ₂ gas can be directly processed and stored; CO ₂ is captured in the flue gas emitted by combustion after combustion. The commonly used CO ₂ separation technologies mainly include chemical absorption (using acid-base absorption) and physical absorption, etc. However, the pressure of ordinary flue gas is small, the volume is large, the concentration of CO ₂ is low, and it contains a lot of N ₂ , so the capture system is huge and consumes a lot of energy; there is no carbon dioxide emission in the hydrogen production process of new energy, and the generated hydrogen Green hydrogen is the development direction of hydrogen production technology. Can the by-product oxygen of new energy electrolytic hydrogen production be used in the oxygen-enriched combustion of the boiler to realize the enrichment of carbon dioxide during the combustion process? At the same time, when the oxygen reserve is insufficient, the post-combustion capture technology can be used to capture the whole process of carbon dioxide? The key to realizing hydrogen production from new energy sources and reducing carbon emissions from boiler combustion.

Contents of the invention

The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, and provide a system and method for hydrogen production, boiler oxygen-enriched combustion, and carbon dioxide capture. The system and method can prepare hydrogen, oxygen, and carbon dioxide capture agents, and realize Hydrogen energy storage, boiler oxygen-enriched combustion and carbon dioxide capture realize the coupling application of traditional energy and new energy.

In order to achieve the above purpose, the system of hydrogen production, boiler oxygen-enriched combustion and carbon dioxide capture described in the present invention includes ion membrane electrolysis hydrogen production system, boiler oxygen-enriched combustion system and carbon dioxide capture system, wherein the ion membrane electrolysis hydrogen production system The oxygen outlet of the boiler is connected with the inlet of the boiler oxygen-enriched combustion system, the flue gas outlet of the boiler oxygen-enriched combustion system and the sodium hydroxide solution outlet and the hydrochloric acid solution outlet of the ion membrane electrolysis hydrogen production system are connected with the inlet of the carbon dioxide capture system, and the carbon dioxide The outlet of the capture system is connected with the inlet of the ion membrane electrolysis hydrogen production system.

The ion membrane electrolytic hydrogen production system includes a saturated sodium chloride solution refining and concentrating device, a desalinated water adding device prepared by hydrogen and caustic soda, a sodium chloride solution adding device, a desalted water adding device prepared by hydrochloric acid, and a desalted water adding device prepared by oxygen , new energy power generation device, ionic membrane electrolysis hydrogen production device, hydrogen collection and delivery device, sodium hydroxide solution collection and delivery device, sodium chloride dilute solution collection and delivery device, hydrochloric acid solution collection and delivery device and oxygen collection and delivery device;

Wherein, the ionic membrane electrolytic hydrogen production device includes a negative electrode, a cation exchange membrane prepared by sodium hydroxide, an anion exchange membrane, a cation exchange membrane prepared by hydrochloric acid, and a positive electrode distributed in sequence, wherein the positive electrode and the negative electrode are respectively connected with the new energy power generation device. connect;

The inlet of the channel formed between the negative electrode and the cation exchange membrane prepared by sodium hydroxide is connected with the outlet of the desalted water adding device prepared by hydrogen and caustic soda; the sodium hydroxide solution of the channel formed between the negative electrode and the cation exchange membrane prepared by sodium hydroxide The outlet is connected to the inlet of the sodium hydroxide solution collection and delivery device, and the hydrogen outlet of the channel formed between the negative electrode and the sodium hydroxide prepared cation exchange membrane is connected to the inlet of the hydrogen collection and delivery device;

The inlet of the channel formed between the cation exchange membrane prepared by sodium hydroxide and the anion exchange membrane is connected with the outlet of the sodium chloride solution adding device, and the outlet of the channel formed between the cation exchange membrane and the anion exchange membrane prepared by sodium hydroxide is connected with the chlorine The inlet of the sodium chloride dilute solution collection and delivery device is connected;

The inlet of the channel formed between the anion exchange membrane and the cation exchange membrane prepared by hydrochloric acid is connected with the outlet of the demineralized water adding device prepared by hydrochloric acid; the outlet of the channel formed between the anion exchange membrane and the cation exchange membrane prepared by hydrochloric acid is connected to the collection and delivery of the hydrochloric acid solution The inlet of the device is connected;

The inlet of the channel formed between the cation exchange membrane prepared by hydrochloric acid and the positive electrode is connected to the outlet of the desalted water adding device prepared by oxygen; the oxygen outlet of the channel formed between the cation exchange membrane prepared by hydrochloric acid and the positive electrode is connected to the inlet of the oxygen collection and delivery device Pass.

The saturated sodium chloride solution refining and concentrating device is connected with the outlet of the sodium chloride dilute solution collecting and conveying device and the outlet of the carbon dioxide capture system, and the outlet of the oxygen collecting and conveying device is connected with the boiler oxygen-enriched combustion system.

The outlet of the hydrogen collecting and conveying device is communicated with the hydrogen storage and conveying device.

The boiler oxygen-enriched combustion system includes an oxygen storage and delivery device, an air delivery device, a boiler, a fuel delivery device, a high-concentration carbon dioxide storage and delivery device, a carbon dioxide compression and separation device, and a carbon dioxide mixed gas storage and delivery device;

Wherein, the outlet of the oxygen collection and delivery device is connected to the inlet of the oxygen storage and delivery device, and the outlet of the oxygen storage and delivery device is connected to the inlet of the boiler and the fuel delivery device;

The outlet of the air conveying device is connected with the inlet of the boiler and the fuel conveying device;

The inlet of the high-concentration carbon dioxide storage and delivery device is connected to the tail flue of the boiler; the outlet of the high-concentration carbon dioxide storage and delivery device is connected to the inlet of the boiler and the fuel delivery device;

The inlet of the carbon dioxide mixed gas storage and delivery device is connected with the tail flue of the boiler; the outlet of the carbon dioxide mixed gas storage and delivery device is connected with the carbon dioxide capture system.

The outlet of the high-concentration carbon dioxide storage and delivery device is also connected with a carbon dioxide compression and separation device.

The carbon dioxide capture system includes a carbon dioxide capture device and a carbon dioxide separation device;

The outlet of the sodium hydroxide solution collection and delivery device is connected with the inlet of the carbon dioxide capture device; the outlet of the hydrochloric acid solution collection and delivery device is connected with the inlet of the carbon dioxide separation device;

The outlet of the carbon dioxide mixed gas storage and delivery device is connected to the inlet of the carbon dioxide capture device, the liquid outlet of the carbon dioxide capture device is connected to the carbon dioxide separation device, and the high-concentration carbon dioxide outlet of the carbon dioxide separation device is connected to the inlet of the high-concentration carbon dioxide storage and delivery device Through, the sodium chloride solution outlet of the carbon dioxide separation device is connected with the inlet of the saturated sodium chloride solution refining and concentrating device.

The outlet of the sodium hydroxide solution collecting and conveying device communicates with the inlet of the carbon dioxide capture device through the sodium hydroxide solution storing and conveying device.

The outlet of the hydrochloric acid solution collecting and conveying device communicates with the inlet of the carbon dioxide separating device through the hydrochloric acid solution storing and conveying device.

The method for hydrogen production, boiler oxygen-enriched combustion and carbon dioxide capture of the present invention comprises the following steps:

The ionic membrane electrolysis hydrogen production system uses the electricity output by the new energy power generation device to generate hydrogen, oxygen, sodium hydroxide solution and hydrochloric acid solution. Among them, the generated hydrogen is green hydrogen, and the generated oxygen is sent to the boiler oxygen-enriched combustion system for oxygen enrichment Combustion, to realize the enrichment of carbon dioxide in the combustion process of the boiler, and the generated sodium hydroxide solution and hydrochloric acid solution are sent to the carbon dioxide capture system as raw materials for carbon dioxide capture, so as to realize the capture of carbon dioxide in the flue gas generated by boiler combustion when the oxygen reserve is insufficient .

The present invention has the following beneficial effects:

During the specific operation of the system and method for hydrogen production, boiler oxygen-enriched combustion and carbon dioxide capture described in the present invention, the ion membrane electrolysis hydrogen production system uses the electricity output by the new energy power generation device to generate hydrogen, oxygen, sodium hydroxide solution and hydrochloric acid solution, wherein the generated hydrogen is green hydrogen to realize new energy storage, and the generated oxygen is used for boiler oxygen-enriched combustion to realize carbon dioxide enrichment in the boiler combustion process, and the generated sodium hydroxide solution and hydrochloric acid solution can be used as carbon dioxide capture The collected raw materials can capture the carbon dioxide in the flue gas generated by boiler combustion when the oxygen reserve is insufficient, and then realize the clean coupled application of traditional energy and new energy, and capture the carbon dioxide produced by boiler combustion while preparing green hydrogen.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a structural diagram of an ion-exchange membrane electrolysis hydrogen production device 7 in the present invention.

Among them, 1 is the refining and concentrating device of saturated sodium chloride solution, 2 is the demineralized water adding device prepared by hydrogen and caustic soda, 3 is the sodium chloride solution adding device, 4 is the demineralized water adding device prepared by hydrochloric acid, and 5 is the demineralized water adding device prepared by oxygen Salt water adding device, 6 is new energy power generation device, 7 is ion membrane electrolysis hydrogen production device, 8 is hydrogen collection and delivery device, 9 is sodium hydroxide solution collection and delivery device, 10 is sodium chloride dilute solution collection and delivery device, 11 is Hydrochloric acid solution collection and delivery device, 12 for oxygen collection and delivery device, 13 for oxygen storage and delivery device, 14 for air delivery device, 15 for boiler, 16 for fuel delivery device, 17 for high-concentration carbon dioxide storage and delivery device, 18 for carbon dioxide compression and separation device, 19 is a carbon dioxide mixed gas storage and delivery device, 20 is a carbon dioxide capture device, 21 is a carbon dioxide separation device, 22 is a sodium hydroxide solution storage and delivery device, 23 is a hydrochloric acid solution storage and delivery device, 24 is a hydrogen storage and delivery device, 25 26 is sodium hydroxide to prepare cation-exchange membrane, 27 is anion-exchange membrane, 28 is hydrochloric acid to prepare cation-exchange membrane, and 29 is positive electrode.

Detailed ways

In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only The embodiments are a part of the present invention, not all embodiments, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concepts disclosed in the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

The schematic diagrams of the structures according to the disclosed embodiments of the present invention are shown in the accompanying drawings. The figures are not drawn to scale, with certain details exaggerated and possibly omitted for clarity of presentation. The shapes of various regions and layers shown in the figure and their relative sizes and positional relationships are only exemplary, and may deviate due to manufacturing tolerances or technical limitations in practice, and those skilled in the art may Regions/layers with different shapes, sizes, and relative positions can be additionally designed as needed.

Referring to Fig. 1 and Fig. 2, the system of hydrogen production, boiler oxygen-enriched combustion and carbon dioxide capture according to the present invention includes ion membrane electrolysis hydrogen production system, boiler oxygen-enriched combustion system and carbon dioxide capture system.

Ion membrane electrolysis hydrogen production system includes saturated sodium chloride solution refining concentration device 1, desalted water addition device prepared by hydrogen and caustic soda 2, sodium chloride solution addition device 3, desalted water addition device prepared by hydrochloric acid 4, desalted water prepared by oxygen Adding device 5, new energy power generation device 6, ion membrane electrolysis hydrogen production device 7, hydrogen gas collection and delivery device 8, sodium hydroxide solution collection and delivery device 9, sodium chloride dilute solution collection and delivery device 10, hydrochloric acid solution collection and delivery device 11, Oxygen collection and delivery device 12 and hydrogen storage and delivery device 24 .

Wherein, the ionic membrane electrolytic hydrogen production device 7 includes a negative electrode 25 distributed in sequence, a cation exchange membrane 26 prepared by sodium hydroxide, an anion exchange membrane 27, a cation exchange membrane 28 prepared by hydrochloric acid, and a positive electrode 29, wherein the positive electrode 29 and the negative electrode 25 are connected with new energy generating device 6 respectively.

The inlet of the channel formed between the negative electrode 25 and the cation exchange membrane 26 prepared by sodium hydroxide is connected with the outlet of the desalted water adding device 2 prepared by hydrogen and caustic soda; the channel formed between the negative electrode 25 and the cation exchange membrane 26 prepared by sodium hydroxide The outlet of the sodium hydroxide solution is connected with the inlet of the sodium hydroxide solution collecting and conveying device 9, and the hydrogen outlet of the channel formed between the negative electrode 25 and the sodium hydroxide prepared cation exchange membrane 26 is connected with the inlet of the hydrogen collecting and conveying device 8, The outlet of the hydrogen collecting and conveying device 8 communicates with the hydrogen storage and conveying device 24 .

The inlet of the channel formed between the cation exchange membrane 26 and the anion exchange membrane 27 prepared by sodium hydroxide communicates with the outlet of the sodium chloride solution adding device 3, and the channel formed between the cation exchange membrane 26 and the anion exchange membrane 27 is prepared by sodium hydroxide. The outlet of the channel communicates with the inlet of the dilute sodium chloride solution collecting and conveying device 10 .

The inlet of the channel formed between the anion exchange membrane 27 and the cation exchange membrane 28 prepared by hydrochloric acid communicates with the outlet of the desalted water adding device 4 prepared by hydrochloric acid; the outlet of the channel formed between the anion exchange membrane 27 and the cation exchange membrane 28 prepared by hydrochloric acid It communicates with the inlet of the hydrochloric acid solution collection and delivery device 11.

The inlet of the channel formed between the cation exchange membrane 28 and the positive electrode 29 prepared by hydrochloric acid communicates with the outlet of the desalted water adding device 5 prepared by oxygen; The inlets of the delivery device 12 are connected.

The boiler oxygen-enriched combustion system includes an oxygen storage and delivery device 13 , an air delivery device 14 , a boiler 15 , a fuel delivery device 16 , a high-concentration carbon dioxide storage and delivery device 17 , a carbon dioxide compression and separation device 18 and a carbon dioxide mixed gas storage and delivery device 19 .

Wherein, the outlet of the oxygen collection and delivery device 12 is connected with the inlet of the oxygen storage and delivery device 13 , and the outlet of the oxygen storage and delivery device 13 is connected with the inlets of the boiler 15 and the fuel delivery device 16 .

The outlet of the air conveying device 14 communicates with the inlet of the boiler 15 and the fuel conveying device 16 .

The inlet of the high-concentration carbon dioxide storage and delivery device 17 is connected with the tail flue of the boiler 15; the outlet of the high-concentration carbon dioxide storage and delivery device 17 is connected with the inlet of the carbon dioxide compression and separation device 18, the inlet of the boiler 15 and the fuel delivery device 16.

The inlet of the carbon dioxide mixed gas storage and delivery device 19 is connected with the tail flue of the boiler 15; the outlet of the carbon dioxide mixed gas storage and delivery device 19 is connected with the carbon dioxide capture system.

The carbon dioxide capture system includes a sodium hydroxide solution storage and delivery device 22 , a hydrochloric acid solution storage and delivery device 23 , a carbon dioxide capture device 20 and a carbon dioxide separation device 21 .

The outlet of the sodium hydroxide solution collection delivery device 9 is connected with the inlet of the sodium hydroxide solution storage delivery device 22, and the outlet of the sodium hydroxide solution storage delivery device 22 is connected with the inlet of the carbon dioxide capture device 20; the hydrochloric acid solution collection delivery device The outlet of 11 communicates with the inlet of the hydrochloric acid solution storage and delivery device 23 , and the outlet of the hydrochloric acid solution storage and delivery device 23 communicates with the inlet of the carbon dioxide separation device 21 .

The outlet of the carbon dioxide mixed gas storage delivery device 19 is connected with the inlet of the carbon dioxide capture device 20, the liquid outlet of the carbon dioxide capture device 20 is connected with the carbon dioxide separation device 21, and the high-concentration carbon dioxide outlet of the carbon dioxide separation device 21 is connected with the high-concentration carbon dioxide storage The inlet of the conveying device 17 is connected, and the outlet of the sodium chloride solution of the carbon dioxide separation device 21 is connected with the inlet of the saturated sodium chloride solution refining and concentrating device 1 .

The method for hydrogen production, boiler oxygen-enriched combustion and carbon dioxide capture of the present invention comprises the following steps:

Equipped with a new energy power generation device 6 next to the thermal power generating set, thermal power generation and new energy power generation are complementary, and at the same time, the new energy power generation device 6 should ensure sufficient capacity to ensure the power supply of the ionic membrane electrolysis hydrogen production device 7 to produce enough hydrogen, Oxygen, sodium hydroxide solution and hydrochloric acid solution.

When the new energy power generation device 6 starts to supply power to the negative electrode 25 and the positive electrode 29 of the ion membrane electrolysis hydrogen production device 7, the desalted water prepared by hydrogen and caustic soda is added to the negative electrode 25 and the cation exchange membrane 26 formed between the sodium hydroxide preparation device 2 Desalted water is passed into the channel, wherein the flow rate of desalted water is adjusted according to the current density and the concentration of sodium hydroxide solution, the current density is controlled at 3.0kA/m ² ~ 9.0kA/m ² , and the concentration of sodium hydroxide is controlled at 1mol /L or so. The sodium chloride solution adding device 3 feeds saturated sodium chloride solution into the channel formed between the sodium hydroxide prepared cation exchange membrane 26 and the anion exchange membrane 27 . The desalinated water adding device 4 prepared by hydrochloric acid feeds desalted water into the channel formed between the anion exchange membrane 27 and the cation exchange membrane 28 prepared by hydrochloric acid. Hydrochloric acid is used to prepare desalted water in the channel formed between the cation exchange membrane 28 and the positive electrode 29 .

The desalinated water is reduced to hydrogen gas at the negative electrode 25, and hydroxide ions are generated at the same time. Under the action of the electric field, the sodium ions pass through the sodium hydroxide to prepare a cation exchange membrane 26 and combine with the hydroxide ions to form sodium hydroxide; the desalted water is at the positive electrode 29 Oxygen is oxidized to generate hydrogen ions at the same time. Under the action of electric field, the generated hydrogen ions pass through hydrochloric acid to prepare cation exchange membrane 28 and combine with chloride ions that pass through anion exchange membrane 27 under the action of electric field to form hydrochloric acid; saturated sodium chloride solution passes through Sodium hydroxide prepares the ion exchange of cation exchange membrane 26 and anion exchange membrane 27 and becomes sodium chloride dilute solution after ion exchange.

The generated hydrogen is transported to the hydrogen storage and delivery device 24 by the hydrogen gas collection and delivery device 8 and delivered to the user after being dried and compressed; the generated sodium hydroxide solution is transported to the sodium hydroxide solution storage and delivery device 22 by the sodium hydroxide solution collection and delivery device 99 The hydrochloric acid solution generated is transported to the hydrochloric acid solution storage transport unit 23 by the hydrochloric acid solution collection transport unit 11 for storage; the generated oxygen is transported to the oxygen storage transport unit 13 by the oxygen collection transport unit 12 for compression and storage; The exchanged dilute sodium chloride solution is recovered to the saturated sodium chloride solution refining and concentrating device 1 through the dilute sodium chloride solution collecting and conveying device 10 for refining and concentrating.

When the oxygen supply in the oxygen storage and delivery device 13 is sufficient, the boiler 15 adopts the oxygen-enriched combustion process, at this time, the air delivery device 14 is closed, and the oxygen in the oxygen storage and delivery device 13 is mixed with the carbon dioxide in the high-concentration carbon dioxide storage and delivery device 17, A mixed gas is formed, and the proportion of oxygen content is controlled at 26% to 30%. A part of the mixed gas is sent into the furnace to participate in combustion, and the other part of the mixed gas is sent to the furnace for combustion through the fuel delivery device 16, and the fuel generated by combustion in the boiler 15 contains The high-concentration carbon dioxide flue gas is recycled back to the high-concentration carbon dioxide storage and delivery device 17, and the remaining high-concentration carbon dioxide is compressed and separated by the carbon dioxide compression and separation device 18 and delivered to users.

When the oxygen in the oxygen storage and delivery device 13 is exhausted, the boiler 15 adopts the traditional air combustion process. At this time, the air delivery device 14 is started, the oxygen storage and delivery device 13 and the high-concentration carbon dioxide storage and delivery device 17 are closed, and a part of the air is sent into the furnace. Participate in the combustion, another part of the air passes through the fuel delivery device 16 to send the fuel into the boiler 15 for combustion, and the mixed flue gas containing carbon dioxide, nitrogen and other gases generated by combustion in the boiler 15 is sent to the carbon dioxide mixed gas storage and delivery device 19, and the carbon dioxide is mixed The gas storage and delivery device 19 transports the mixed gas to the carbon dioxide capture system, and the carbon dioxide captured by the carbon dioxide capture system is transported to the high-concentration carbon dioxide storage and delivery device 17 for storage, and the high-concentration carbon dioxide is compressed and separated by the carbon dioxide compression and separation device 18 before being transported to the user.

When the traditional air combustion process is adopted, carbon dioxide needs to be captured. At this time, the sodium hydroxide solution storage and delivery device 22 transports the sodium hydroxide solution to the carbon dioxide capture device 20, and the carbon dioxide capture device 20 contains a mixed gas of carbon dioxide. It operates countercurrently with the sodium hydroxide solution. By controlling the delivery flow of the sodium hydroxide solution, the excess carbon dioxide reacts with the sodium hydroxide solution to form a solution mainly composed of sodium bicarbonate, thereby maximizing the use of sodium hydroxide.

The hydrochloric acid solution storage and delivery device 23 transports the hydrochloric acid solution to the carbon dioxide separation device 21. In the carbon dioxide separation device 21, the sodium bicarbonate-based solution and the hydrochloric acid solution produced by the carbon dioxide capture device 20 are operated in a countercurrent manner to control the flow rate of the hydrochloric acid solution. The delivery flow makes the solution mainly composed of sodium bicarbonate completely react with hydrochloric acid to generate sodium chloride solution and carbon dioxide. Among them, by monitoring the pH value of the hydrochloric acid flow path, when the pH is close to 7.0, the hydrochloric acid completely reacts with the sodium bicarbonate solution Reaction, in addition, the generated sodium chloride solution is refluxed to the saturated sodium chloride solution refining and concentrating device 1 for refining and concentration, and the generated carbon dioxide is transported to the high-concentration carbon dioxide storage and delivery device 17 for storage.

The power generation method of the new energy power generation device 6 is wind power generation, photovoltaic power generation, geothermal power generation and tidal power generation, etc.; the fuel in the fuel delivery device 16 is coal and biomass fuel.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention can still be Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention shall fall within the protection scope of the claims of the present invention.

Claims (7)

1. A system for hydrogen production, boiler oxygen-enriched combustion and carbon dioxide capture, characterized in that it includes an ion-exchange membrane electrolysis hydrogen production system, a boiler oxygen-enrichment combustion system and a carbon dioxide capture system, wherein the ion-exchange membrane electrolysis hydrogen production system The oxygen outlet is connected to the inlet of the boiler oxygen-enriched combustion system, the flue gas outlet of the boiler oxygen-enriched combustion system and the sodium hydroxide solution outlet and the hydrochloric acid solution outlet of the ion membrane electrolysis hydrogen production system are connected to the inlet of the carbon dioxide capture system. The outlet of the collection system is connected with the inlet of the ion membrane electrolysis hydrogen production system. 2. The system of hydrogen production, boiler oxygen-enriched combustion and carbon dioxide capture according to claim 1, characterized in that, the ion membrane electrolysis hydrogen production system comprises a saturated sodium chloride solution refining concentration device (1), hydrogen and Adding device for desalinated water prepared by caustic soda (2), adding device for sodium chloride solution (3), adding device for desalinated water prepared by hydrochloric acid (4), adding device for desalinated water prepared by oxygen (5), new energy power generation device (6) , ion membrane electrolysis hydrogen production device (7), hydrogen collection and delivery device (8), sodium hydroxide solution collection and delivery device (9), sodium chloride dilute solution collection and delivery device (10), hydrochloric acid solution collection and delivery device (11) And oxygen collection delivery device (12); Wherein, the ion membrane electrolytic hydrogen production device (7) comprises a negative electrode (25), a cation exchange membrane (26) prepared by sodium hydroxide, an anion exchange membrane (27), a cation exchange membrane (28) prepared by hydrochloric acid, and a positive electrode distributed sequentially. (29), wherein, the positive pole (29) and the negative pole (25) are respectively connected to the new energy power generation device (6); The entrance of the channel formed between the negative pole (25) and the cation exchange membrane (26) prepared by sodium hydroxide is connected with the outlet of the desalted water adding device (2) prepared by hydrogen and caustic soda; The outlet of the sodium hydroxide solution of the channel formed between the exchange membranes (26) communicates with the inlet of the sodium hydroxide solution collection and delivery device (9), and the negative electrode (25) prepares the cation exchange membrane (26) between the negative electrode (25) and the sodium hydroxide solution. The hydrogen outlet that forms channel is communicated with the inlet of hydrogen collection conveying device (8); The entrance of the channel formed between the sodium hydroxide prepared cation exchange membrane (26) and the anion exchange membrane (27) is connected with the outlet of the sodium chloride solution adding device (3), and the sodium hydroxide prepares the cation exchange membrane (26) and The outlet of the channel formed between the anion exchange membranes (27) is communicated with the inlet of the sodium chloride dilute solution collecting and conveying device (10); The inlet of the channel formed between the anion exchange membrane (27) and the cation exchange membrane (28) prepared by hydrochloric acid is connected with the outlet of the desalted water adding device (4) prepared by hydrochloric acid; (28) The outlet of the channel formed between is communicated with the inlet of the hydrochloric acid solution collection delivery device (11); The entrance of the channel formed between the cation exchange membrane (28) prepared by hydrochloric acid and the positive electrode (29) is connected with the outlet of the desalted water adding device (5) prepared by oxygen; The oxygen outlet of the channel formed between is communicated with the inlet of the oxygen collection delivery device (12); The saturated sodium chloride solution refining concentration device (1) is connected with the outlet of the sodium chloride dilute solution collection and delivery device (10) and the outlet of the carbon dioxide capture system, and the outlet of the oxygen collection and delivery device (12) is connected with the boiler oxygen-enriched combustion system connected. 3. The system for hydrogen production, boiler oxygen-enriched combustion and carbon dioxide capture according to claim 1, characterized in that the outlet of the hydrogen collection and delivery device (8) is connected with a hydrogen storage and delivery device (24). 4. The system of hydrogen production, boiler oxygen-enriched combustion and carbon dioxide capture according to claim 2, characterized in that, the boiler oxygen-enriched combustion system comprises an oxygen storage and delivery device (13), an air delivery device (14), Boiler (15), fuel delivery device (16), high-concentration carbon dioxide storage and delivery device (17), carbon dioxide compression and separation device (18), and carbon dioxide mixed gas storage and delivery device (19); Wherein, the outlet of the oxygen collection and delivery device (12) is connected with the inlet of the oxygen storage and delivery device (13), and the outlet of the oxygen storage and delivery device (13) is connected with the inlet of the boiler (15) and the fuel delivery device (16); The outlet of the air conveying device (14) communicates with the inlet of the boiler (15) and the fuel conveying device (16); The inlet of the high-concentration carbon dioxide storage and delivery device (17) is connected with the tail flue of the boiler (15); the outlet of the high-concentration carbon dioxide storage and delivery device (17) is connected with the inlet of the boiler (15) and the fuel delivery device (16) ; The inlet of the carbon dioxide mixed gas storage and delivery device (19) is connected with the tail flue of the boiler (15); the outlet of the carbon dioxide mixed gas storage and delivery device (19) is connected with the carbon dioxide capture system. 5. The system of hydrogen production, boiler oxygen-enriched combustion and carbon dioxide capture according to claim 4, characterized in that the outlet of the high-concentration carbon dioxide storage and delivery device (17) is also connected to a carbon dioxide compression and separation device (18). 6. The system of hydrogen production, boiler oxygen-enriched combustion and carbon dioxide capture according to claim 4, characterized in that, the carbon dioxide capture system comprises a carbon dioxide capture device (20) and a carbon dioxide separation device (21); The outlet of the sodium hydroxide solution collection delivery device (9) is communicated with the inlet of the carbon dioxide capture device (20) through the sodium hydroxide solution storage delivery device (22); the outlet of the hydrochloric acid solution collection delivery device (11) is stored through the hydrochloric acid solution The conveying device (23) is communicated with the inlet of the carbon dioxide separator (21); The outlet of the carbon dioxide mixed gas storage delivery device (19) communicates with the inlet of the carbon dioxide capture device (20), the liquid outlet of the carbon dioxide capture device (20) communicates with the carbon dioxide separation device (21), and the carbon dioxide separation device (21) The high-concentration carbon dioxide outlet is connected with the inlet of the high-concentration carbon dioxide storage delivery device (17), and the sodium chloride solution outlet of the carbon dioxide separation device (21) is connected with the inlet of the saturated sodium chloride solution refining concentration device (1). 7. A method for hydrogen production, boiler oxygen-enriched combustion and carbon dioxide capture, characterized in that, based on the system of hydrogen production, boiler oxygen-enriched combustion and carbon dioxide capture according to claim 1, comprising the following steps: The ionic membrane electrolysis hydrogen production system uses the electricity output by the new energy power generation device to generate hydrogen, oxygen, sodium hydroxide solution and hydrochloric acid solution. Among them, the generated hydrogen is green hydrogen, and the generated oxygen is sent to the boiler oxygen-enriched combustion system for oxygen enrichment Combustion, realize the enrichment of carbon dioxide during the combustion process of the boiler (15), the generated sodium hydroxide solution and hydrochloric acid solution are sent to the carbon dioxide capture system as raw materials for carbon dioxide capture, and realize the combustion of the boiler (15) when the oxygen reserve is insufficient. Carbon dioxide capture from the air.

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