Natural gas zero-carbon nitrogen-free combustion system

Abstract

The utility model relates to the technical field of natural gas emission reduction combustion systems, in particular to a natural gas zero-carbon nitrogen-free combustion system. According to the natural gas zero-carbon nitrogen-free combustion system, the photovoltaic power generation device is used for supplying power to the water electrolysis device, so that pure oxygen is generated, high-purity carbon dioxide flue gas can be generated in the pure oxygen combustion process, efficient carbon dioxide capture and treatment are facilitated through the combustion device, greenhouse gas emission is remarkably reduced, and the environment is protected. And moreover, by adopting photovoltaic power generation and electrolyzed water, renewable energy sources and oxygen resources are fully utilized, and a cleaner and more efficient combustion process is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of natural gas emission reduction combustion systems, in particular to a natural gas zero-carbon and nitrogen-free combustion system. Background Art

[0002] The combustion of fossil fuels, particularly in internal combustion engines, generates nitrogen oxides and their derivatives from nitrogen and oxygen at high temperatures, which have serious environmental and health impacts. Environmentally, nitrogen oxides have a high global warming potential and react with organic compounds to form photochemical smog. They also contribute to atmospheric ozone and secondary aerosols, increasing particulate matter emissions. High concentrations of nitrogen oxides are toxic to humans. Current technical approaches to reducing nitrogen oxide emissions include enhancing fuel-air mixing, modifying mechanical components, controlling ignition timing, and controlling the fuel-air mixture ratio. In recent years, research on reducing the environmental and human health impacts of nitrogen oxides emitted by internal combustion engines has attracted considerable attention.

[0003] The main reason for the above problems is that internal combustion engines usually use air as a combustion aid, which causes nitrogen and oxygen in the air to produce nitrogen oxides and their derivatives. Therefore, there is an urgent need to provide a combustion system that can effectively reduce the production of nitrogen oxides. Utility Model Content

[0004] In order to solve the technical problems mentioned in the background technology, the utility model provides a natural gas zero-carbon and nitrogen-free combustion system, comprising: a photovoltaic power generation device, a water electrolysis device and a combustion device; the photovoltaic power generation device is connected to the water electrolysis device to transmit electrical energy to the water electrolysis device; the water electrolysis device is connected to the combustion device to transport pure oxygen produced by hydrolysis to the combustion device; wherein the combustion device comprises: an internal combustion engine and a natural gas supply mechanism; the natural gas supply mechanism is connected to the internal combustion engine through a pipeline; and the internal combustion engine is suitable for receiving natural gas and pure oxygen, and mixing the two and then burning them to generate electricity.

[0005] Furthermore, the combustion device also includes: a capture mechanism; the capture mechanism is arranged at the flue gas pipe outlet of the internal combustion engine; and the capture mechanism is connected to the air supply pipeline; wherein the capture mechanism is suitable for capturing carbon dioxide and steam in the flue gas pipe and sending the two into the air supply pipeline to enter the internal combustion engine for combustion together with pure oxygen.

[0006] Furthermore, the photovoltaic power generation device is connected to the power supply end of the water electrolysis device through a power line.

[0007] Furthermore, the water electrolysis device includes: an electrolytic cell, an air supply pipeline and a hydrogen delivery pipe; the electrolytic cell is suitable for containing electrolyzed water; the air supply pipeline is suitable for delivering pure oxygen generated by electrolysis to the internal combustion engine; the hydrogen delivery pipe is suitable for delivering hydrogen generated by electrolysis to a hydrogen storage mechanism for storage.

[0008] Furthermore, the combustion device further comprises: a generator; the generator is connected to the internal combustion engine to generate electricity under the thermal drive of the internal combustion engine.

[0009] Furthermore, the natural gas zero-carbon and nitrogen-free combustion system also includes: a waste heat recovery device, which is connected to the combustion device and the water electrolysis device through corresponding pipelines, thereby recovering the heat generated by the two.

[0010] Furthermore, the inner wall of the internal combustion engine is coated with a thermal barrier coating.

[0011] The beneficial effect of the present invention is that the natural gas zero-carbon and nitrogen-free combustion system of the present invention supplies power to the water electrolysis device through the photovoltaic power generation device, thereby generating pure oxygen, and then high-purity carbon dioxide flue gas can be generated in the pure oxygen combustion process. The combustion device provided is conducive to efficient carbon dioxide capture and treatment, thereby significantly reducing greenhouse gas emissions. In addition, the use of photovoltaic power generation and water electrolysis fully utilizes renewable energy and oxygen resources to achieve a cleaner and more efficient combustion process.

[0012] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0013] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 A schematic diagram of the process structure of a natural gas zero-carbon and nitrogen-free combustion system involved in some embodiments is shown.

[0016] In the figure: photovoltaic power generation device 1, water electrolysis device 2, gas supply pipeline 21, hydrogen delivery pipe 22, internal combustion engine 3, generator 4, waste heat recovery device 5, capture mechanism 6. DETAILED DESCRIPTION

[0017] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0018] like Figure 1 As shown, at least one embodiment provides a natural gas zero-carbon and nitrogen-free combustion system, comprising: a photovoltaic power generation device 1, a water electrolysis device 2 and a combustion device; the photovoltaic power generation device 1 is connected to the water electrolysis device 2 to transmit electrical energy to the water electrolysis device 2; the water electrolysis device 2 is connected to the combustion device to transport pure oxygen produced by hydrolysis to the combustion device; wherein the combustion device comprises: an internal combustion engine 3 and a natural gas supply mechanism (not shown in the figure); the natural gas supply mechanism is connected to the internal combustion engine 3 through a pipeline; and the internal combustion engine 3 is suitable for receiving natural gas and pure oxygen, and mixing the two and then burning them to generate electricity.

[0019] In some embodiments, the water electrolysis device 2 is powered by a photovoltaic power generation device 1, thereby generating pure oxygen, and then generating high-purity carbon dioxide flue gas during the pure oxygen combustion process. The combustion device is conducive to efficient carbon dioxide capture and treatment, thereby significantly reducing greenhouse gas emissions. In addition, the use of photovoltaic power generation and water electrolysis fully utilizes renewable energy and oxygen resources to achieve a cleaner and more efficient combustion process.

[0020] In some embodiments, the capture mechanism 6 includes but is not limited to a flue gas pretreatment system, a packed absorption tower, a packed regeneration tower, an exhaust gas washing system, a solution boiler, an amine recovery heater, a product gas treatment system, and a system water balance maintenance system to fully capture and utilize carbon dioxide and steam in the flue gas.

[0021] As an optional embodiment, the capture mechanism 6 is disposed at the flue gas outlet of the internal combustion engine 3 and is connected to the gas supply line to collect carbon dioxide and steam from the flue gas and deliver them to the gas supply line for combustion in the internal combustion engine 3 along with pure oxygen. Furthermore, pure oxygen and carbon dioxide, replacing air as combustion aids, can minimize nitrogen oxides produced by combustion. Furthermore, carbon dioxide has a greater work capacity than nitrogen, thereby improving the system's power generation efficiency.

[0022] In some embodiments, the photovoltaic power generation device 1 and the water electrolysis device 2 include but are not limited to using a voltage converter and / or a voltage-current converter to adjust the voltage and current, so that the electric energy generated by the photovoltaic power generation device 1 is transmitted to the power supply of the water electrolysis device 2 via a power line.

[0023] In some embodiments, the water electrolysis device 2 includes: an electrolytic cell and a gas supply pipeline 21 and a hydrogen delivery pipe 22; the electrolytic cell is suitable for containing electrolyzed water; the gas supply pipeline 21 is suitable for delivering pure oxygen generated by electrolysis to the internal combustion engine 3; the hydrogen delivery pipe 22 is suitable for delivering the hydrogen generated by electrolysis to a hydrogen storage mechanism for storage.

[0024] In some embodiments, the combustion device further includes: a generator 4; the generator 4 is connected to the internal combustion engine 3, and the high-pressure and high-temperature gas generated by the mixed combustion of pure oxygen and natural gas in the internal combustion engine 3 drives the generator 4 to generate electricity.

[0025] In some embodiments, the natural gas zero-carbon and nitrogen-free combustion system further includes: a waste heat recovery device 5, which is respectively connected to the combustion device and the water electrolysis device 2 through corresponding pipelines, thereby recovering the heat generated by the two.

[0026] In some embodiments, the primary component of the flue gas during pure oxygen combustion of natural gas is carbon dioxide, rather than nitrogen as in conventional systems. This results in differences in combustion temperature, pressure, and performance across the entire system. Therefore, the addition of high-temperature materials, thermal barrier coatings, high-efficiency cooling, and a laser ignition system to internal combustion engine 3 improves its performance. Furthermore, the inclusion of a multi-pass heat exchanger in the pure oxygen combustion cycle can further enhance engine 3's performance.

[0027] In summary, the natural gas zero-carbon and nitrogen-free combustion system of the present invention powers the water electrolysis device 2 through the photovoltaic power generation device 1, thereby generating pure oxygen, and then generating high-purity carbon dioxide flue gas during the pure oxygen combustion process. The combustion device provided is conducive to efficient carbon dioxide capture and treatment, thereby significantly reducing greenhouse gas emissions. In addition, the use of photovoltaic power generation and water electrolysis fully utilizes renewable energy and oxygen resources to achieve a cleaner and more efficient combustion process.

[0028] In the description of the embodiments of the present invention, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. There may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. With the above-mentioned ideal embodiments of the present invention as inspiration, and through the above-mentioned description, relevant staff can make various changes and modifications without departing from the scope of the technical idea of ​​this utility model. The technical scope of this utility model is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A natural gas zero-carbon and nitrogen-free combustion system, characterized in that: include: Photovoltaic power generation devices, water electrolysis devices and combustion devices; The photovoltaic power generation device is connected to the water electrolysis device to transmit electrical energy to the water electrolysis device; The water electrolysis device is connected to the combustion device to transport the pure oxygen generated by hydrolysis to the combustion device; in The combustion device includes: an internal combustion engine and a natural gas supply mechanism; The natural gas supply mechanism is connected to the internal combustion engine via a pipeline; and The internal combustion engine is suitable for receiving natural gas and pure oxygen, mixing the two and then burning them to generate electricity; The water electrolysis device comprises: an electrolytic cell, a gas supply pipeline and a hydrogen delivery pipe; The electrolytic cell is suitable for containing electrolyzed water; The gas supply pipeline is suitable for delivering pure oxygen generated by electrolysis to the internal combustion engine; The hydrogen delivery pipe is suitable for delivering hydrogen generated by electrolysis to a hydrogen storage mechanism for storage; The combustion device further comprises: a capture mechanism; The capture mechanism is arranged at the flue gas pipe outlet of the internal combustion engine; and The capture mechanism is connected to the air supply pipeline; wherein The capture mechanism is suitable for capturing carbon dioxide and steam in the flue gas pipe and sending the two into the gas supply pipeline so as to enter the internal combustion engine for combustion together with pure oxygen.

2. The natural gas zero-carbon and nitrogen-free combustion system according to claim 1, characterized in that: The photovoltaic power generation device is connected to the power supply end of the water electrolysis device through a power line.

3. The natural gas zero-carbon and nitrogen-free combustion system according to claim 1, characterized in that: The combustion device further comprises: a generator; The generator is connected to the internal combustion engine to generate electricity under the thermal drive of the internal combustion engine.

4. The natural gas zero-carbon and nitrogen-free combustion system according to claim 1, characterized in that: Also includes: The waste heat recovery device is connected to the combustion device and the water electrolysis device through corresponding pipelines, thereby recovering the heat generated by the two.

5. The natural gas zero-carbon and nitrogen-free combustion system according to claim 1, characterized in that: The inner wall of the internal combustion engine is coated with a thermal barrier coating.

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