Gas stove

Abstract

The invention provides a gas stove, and relates to the technical field of liquid hydrogen storage. A gas stove comprises a first container, a second container, a liquid conveying pump, a dehydrogenation module, a valve and a cooking bench, the first container is used for storing hydrogen-rich hydrogen oil, and the second container is used for storing hydrogen-poor hydrogen oil; the first container is communicated with the second container through the dehydrogenation module, the dehydrogenation module is communicated with the cooking bench through the valve, and the infusion pump is arranged between the first container and the dehydrogenation module. According to the invention, the hydrogen-rich hydrogen oil can be directly utilized to carry out dehydrogenation reaction, so that stable hydrogen is generated to supply hydrogen to a cooking bench for combustion.

Description

Technical Field

[0001] The present application relates to the technical field of liquid hydrogen storage, and in particular to a gas stove. Background Art

[0002] Hydrogen energy is an ideal substitute for traditional fossil fuels. Countries around the world are accelerating the development and utilization of clean energy. Hydrogen energy is an ideal substitute for traditional fossil fuels and is gradually becoming one of the important carriers of global energy transformation and development.

[0003] At present, my country's overall hydrogen production capacity is relatively strong. In 2021, my country's hydrogen production reached 33 million tons. From the current terminal demand, more than 90% is used in the industrial field, of which synthetic ammonia and synthetic methanol account for more than 60% of the total demand for hydrogen, and other industrial fields such as refinery hydrogen and coal chemical industry account for more than 30%. The China Hydrogen Energy Alliance predicts that my country's annual demand for hydrogen will increase to about 130 million tons, accounting for about 20% of terminal energy consumption. Among them, industrial hydrogen accounts for 60%, about 77.94 million tons, transportation accounts for 31%, about 40.51 million tons, and construction and power sectors account for about 9% in total.

[0004] Liquid organic hydrogen storage (LOHC) technology is a new type of hydrogen storage technology with high hydrogen storage density. It has great development potential in large-scale storage and transportation of hydrogen, transoceanic transportation and international hydrogen trade. Its principle is to store hydrogen by means of the reversible reaction and hydrogenation reaction of unsaturated liquid organic matter such as olefins, alkynes or aromatic hydrocarbons and hydrogen, and to release hydrogen by means of dehydrogenation reaction. The mass hydrogen storage density is 5%-7.5%, the hydrogen storage capacity is large, and the hydrogen storage material is liquid organic matter, which can be transported at room temperature and pressure, which is convenient and safe. The dehydrogenation link is based on the catalytic dehydrogenation reaction of organic liquid under certain temperature conditions. After the reaction product is separated by gas and liquid, hydrogen is transported to the hydrogen use end. At present, the organic hydrogen storage carriers that are widely studied at home and abroad include cyclohexane, methylcyclohexane (MCH), decahydronaphthalene, dibenzyltoluene, dodecahydro-N-ethylcarbazole (12H-NEC), etc. With the continuous development of organic liquid hydrogen storage technology, methylcyclohexane system, ethylcarbazole system and dibenzyltoluene system gradually show commercial potential.

[0005] However, the prior art lacks a device suitable for organic liquid hydrogen storage technology to directly supply hydrogen combustion to the stove.

[0006] The above information disclosed in the above Background section is only for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not form the prior art that is already known to one of ordinary skill in the art. Summary of the invention

[0007] The main purpose of the present application is to provide a gas stove that can directly utilize hydrogen-rich hydrogen oil for dehydrogenation reaction, thereby generating stable hydrogen to provide hydrogen combustion for the stove.

[0008] In order to solve the aforementioned technical problems, the present application provides a gas stove, comprising a first container, a second container, an infusion pump, a dehydrogenation module, a valve and a stove top, wherein the first container is used to store hydrogen-rich hydrogen oil, and the second container is used to store hydrogen-poor hydrogen oil; the first container and the second container are connected through the dehydrogenation module, the dehydrogenation module and the stove top are connected through the valve, and the infusion pump is arranged between the first container and the dehydrogenation module.

[0009] Optionally, in some embodiments of the present invention, a regulating valve is connected between the first container and the dehydrogenation module.

[0010] Optionally, in some embodiments of the present invention, the dehydrogenation module comprises a dehydrogenation container, in which a heating device and a dehydrogenation catalyst are provided.

[0011] Optionally, in some embodiments of the present invention, the dehydrogenation catalyst comprises a supported or unsupported catalyst having at least one of Pt, Pd, Ni, and Ru metals as an active component.

[0012] Optionally, in some embodiments of the present invention, the above also includes a gas-liquid separation tank, which is arranged between the dehydrogenation module and the stove, the gas-liquid separation tank is connected to the stove, and the gas-liquid separation tank is also connected to the second container.

[0013] Optionally, in some embodiments of the present invention, the above also includes a one-way valve and a flashback preventer, and the one-way valve and the flashback preventer are arranged between the dehydrogenation module and the cooktop.

[0014] Optionally, in some embodiments of the present invention, an adsorption device is connected between the dehydrogenation module and the stove, and an adsorption material is provided in the adsorption device.

[0015] Optionally, in some embodiments of the present invention, the adsorption material includes a mixture of one or more of activated carbon, alumina, and molecular sieves.

[0016] Optionally, in some embodiments of the present invention, the stove is provided with a reflux pipe connected to the dehydrogenation module for passing the separated hydrogen to the dehydrogenation module, and the reflux pipe is provided with an igniter for igniting the hydrogen.

[0017] Optionally, in some embodiments of the present invention, the hydrogen-rich hydrogen oil includes at least one mixture of hydrogenated N-ethylcarbazole, hydrogenated N-propylcarbazole, hydrogenated N-methylindole, hydrogenated dimethylindole, methylcyclohexane, and hydrogenated dibenzyltoluene.

[0018] The beneficial effects that can be achieved by this application.

[0019] A gas stove proposed in an embodiment of the present application includes a first container, a second container, an infusion pump, a dehydrogenation module, a valve and a stove top; the first container and the second container are connected through the dehydrogenation module, the dehydrogenation module and the stove top are connected through the valve, and the infusion pump is arranged between the first container and the dehydrogenation module.

[0020] Among them, the first container is used to place hydrogen-rich hydrogen oil, and the second container is used to place hydrogen-poor hydrogen oil. The first container and the second container are connected through a dehydrogenation module, and the hydrogen-rich hydrogen oil in the hydrogen-rich hydrogen oil storage container can be passed into the dehydrogenation module through an infusion pump, and the hydrogen-rich hydrogen oil undergoes a dehydrogenation reaction to produce hydrogen and hydrogen-poor hydrogen oil. The produced hydrogen-poor hydrogen oil is passed into the second container through a transport pipe, and the produced hydrogen is passed into the stove through an air duct, so that the hydrogen-rich hydrogen oil is directly used for a dehydrogenation reaction, thereby producing stable hydrogen to supply hydrogen combustion for the stove. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the structure of a gas stove provided by an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of the structure of the reflux of the gas stove provided in an embodiment of the present invention.

[0023] Icons: 1-first container, 2-second container, 3-infusion pump, 4-dehydrogenation module, 5-gas-liquid separation tank, 6-adsorption equipment, 7-check valve, 8-valve, 9-stove, 10-igniter, 11-heating equipment, 12-backfire preventer.

[0024] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in 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.

[0026] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0029] Liquid Organic Hydrogen Carriers Technology (LOHC) is an innovative hydrogen storage method that uses liquid organics containing unsaturated carbon bonds such as certain olefins, alkynes or aromatic hydrocarbons as hydrogen storage carriers. These organics achieve the storage and release of hydrogen through a one-to-one reversible reaction. Specifically, during the hydrogenation process, hydrogen is fixed to organic compounds to form a stable hydrogen organic compound liquid; in the dehydrogenation stage, hydrogen is released and the carrier liquid returns to its original state, ready for hydrogenation again.

[0030] The main advantage of this technology is that it can safely store and transport hydrogen at room temperature and pressure, which is compatible with existing fuel infrastructure. In addition, hydrogen will not be lost during long-term storage or transportation, compared to the large amount of evaporation losses in the liquid hydrogen delivery chain. Therefore, organic liquid hydrogen storage plays an important role in the storage, transportation and trading of energy from different sources.

[0031] Since this hydrogen fuel stove is suitable for civilian use, it not only has a broad market but also can create huge economic benefits. However, the existing technology has not been able to implement this technology well in civilian scenarios.

[0032] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0033] In order to achieve the above purpose, refer to Figure 1 The embodiment of the present application provides a gas stove, comprising a first container 1, a second container 2, an infusion pump 3, a dehydrogenation module 4, a valve 8 and a stove 9.

[0034] The first container 1 and the second container 2 are connected via the dehydrogenation module 4 , and the dehydrogenation module 4 and the stove 9 are connected via the valve 8 .

[0035] In this embodiment, the organic matter after hydrogenation of the organic hydrogen storage carrier used in the organic liquid hydrogen storage is referred to as hydrogen-rich hydrogen oil, and the organic hydrogen storage carrier after dehydrogenation is referred to as hydrogen-poor hydrogen oil, wherein the hydrogen-rich hydrogen oil can be at least one mixture of hydrogenated N-ethylcarbazole, hydrogenated N-propylcarbazole, hydrogenated N-methylindole, hydrogenated dimethylindole, methylcyclohexane, hydrogenated dibenzyltoluene and the like, and the hydrogen-poor hydrogen oil is the corresponding N-ethylcarbazole, N-propylcarbazole, N-methylindole, dimethylindole, toluene, dibenzyltoluene and the like substances after dehydrogenation of the hydrogen-rich hydrogen oil.

[0036] These media have different characteristics in terms of hydrogen storage mass and volume hydrogen storage performance, non-volatility, carrier stability, dehydrogenation rate, hydrogen release purity, carrier cost, safety, and environmental protection.

[0037] The first container 1 is used to place hydrogen-rich hydrogen oil, and the second container 2 is used to place hydrogen-poor hydrogen oil. The first container 1 and the second container 2 are connected through the dehydrogenation module 4. The hydrogen-rich hydrogen oil in the hydrogen-rich hydrogen oil storage container can be introduced into the dehydrogenation module 4 through a transport pipe, and the hydrogen-rich hydrogen oil undergoes a dehydrogenation reaction to generate hydrogen and hydrogen-poor hydrogen oil. The generated hydrogen is introduced into the stove 9 through an air duct, and the hydrogen-poor hydrogen oil is introduced into the second container 2 through a transport pipe. A valve 8 is provided between the dehydrogenation module 4 and the stove 9 to control the connection or closing of the pipeline between the dehydrogenation module 4 and the stove 9. An infusion pump 3 is provided between the first container 1 and the dehydrogenation module 4 to drive the transportation of the hydrogen-rich hydrogen oil in the first container 1 through the infusion pump 3.

[0038] Optionally, a regulating valve is connected between the first container 1 and the dehydrogenation module 4 of the present embodiment. The regulating valve is provided to adjust the amount of material introduced from the first container 1 into the dehydrogenation module 4, thereby adjusting the generated hydrogen to achieve the purpose of controlling the temperature of the stove 9. When turning off the fire, first close the valve 8 and then turn off the regulating pump to stop the hydrogen supply and turn off the fire.

[0039] The stove 9 is provided with a corresponding ignition device for igniting the separated hydrogen.

[0040] As an optional implementation, the dehydrogenation module 4 of this embodiment includes a dehydrogenation container, and a heating device 11 and a dehydrogenation catalyst are arranged in the dehydrogenation container.

[0041] The hydrogen-rich oil introduced into the dehydrogenation container is heated to a temperature suitable for dehydrogenation. The dehydrogenation temperature is usually in the range of 100°C-250°C. The dehydrogenation efficiency can be further accelerated by setting a dehydrogenation catalyst.

[0042] Optionally, the outside of the dehydrogenation container of this embodiment is a thermal insulation material layer, and the heating device 11 can use an electric heating device 11 such as an electric heating wire or a heating rod. The heating device 11 is arranged in the thermal insulation material layer of the dehydrogenation container. The heating device 11 can be powered by an external power supply or connected to the mains. At the same time, a high-temperature resistant temperature detection device can be set in the dehydrogenation container to perform real-time detection of the temperature in the dehydrogenation container, so as to set different preset temperature adjustment ranges according to the dehydrogenation temperatures of different hydrogen-rich oils.

[0043] Specifically, the dehydrogenation catalyst of this embodiment may include a supported or unsupported catalyst with metals such as Pt, Pd, Ni, Ru, etc. as active components. The specific catalyst ratio needs to be adjusted according to the actual components of the hydrogen-rich oil.

[0044] As an optional implementation, the dehydrogenation module 4 of this embodiment further includes a gas-liquid separation tank 5, which is disposed between the dehydrogenation container and the second container 2, and is connected to the stove 9, and is also connected to the second container 2.

[0045] When the viscosity of the liquid is low, for example, lower than 5 mPa·S, the separated hydrogen can be directly introduced into the stove 9 and used directly without the need to additionally set up a gas-liquid separation tank 5. When the viscosity of the liquid is relatively high, for example, greater than 5 mPa·S, the liquid and the hydrogen are not easy to separate. At this time, after the hydrogen-rich hydrogen oil has been subjected to high-temperature catalytic treatment in the dehydrogenation container, it is first introduced into the gas-liquid separation tank 5 for separation, thereby improving the separation efficiency.

[0046] The gas-liquid separation tank 5 can use cryogenic separation or centrifugal separation technology to achieve gas-liquid separation. When the liquid separated from the gas-liquid separation tank 5 enters the second container 2, it is connected by the connecting vessel principle or a one-way valve 7 is installed to prevent the gas at the tail end from entering the gas-liquid separation tank 5 in reverse;

[0047] At the same time, the gas-liquid separation tank 5 can be disassembled or installed from the pipeline according to the actual use situation to be applicable to more situations.

[0048] It can be understood that the dehydrogenation module 4 of this embodiment further includes a one-way valve 7 and a flashback preventer 12 , and the one-way valve 7 and the flashback preventer 12 are arranged between the dehydrogenation container and the stove 9 .

[0049] The one-way valve 7 and the flashback preventer 12 are provided to realize the one-way flow and safety protection of hydrogen in the pipeline between the dehydrogenation module 4 and the stove 9.

[0050] As an optional implementation, in this embodiment, an adsorption device 6 is connected between the dehydrogenation module 4 and the stove 9, and an adsorption material is provided in the adsorption device 6.

[0051] The separated hydrogen is introduced into the adsorption device 6, so that the small amount of organic impurities carried by it are adsorbed by the adsorption material in the adsorption device 6, and purer hydrogen is discharged, thereby avoiding the negative impact of organic impurities during combustion. The hydrogen flows into the one-way valve 7 and the flashback preventer 12 to achieve one-way flow and safety protection of hydrogen.

[0052] The adsorption material of this embodiment includes one or more mixtures of activated carbon, alumina, and molecular sieves.

[0053] Furthermore, the adsorption material saturated with organic matter can be removed from the pipeline together with the adsorption device 6 and replaced with clean adsorption material. At the same time, the adsorption device 6 can also be cooled to improve the adsorption effect of organic impurities carried in hydrogen.

[0054] Reference Figure 2 As an optional implementation, the stove 9 of this embodiment is provided with a reflux pipe connected to the dehydrogenation module 4 for passing the separated hydrogen to the dehydrogenation module 4, and the reflux pipe is provided with an igniter 10 for igniting the hydrogen.

[0055] In actual use, the separated hydrogen passes through the one-way valve 7 and the backfire preventer 12, and then passes through the valve 8, and most of it flows into the stove 9, and a small part is sent back to the dehydrogenation module 4 through the reflux pipe, and then ignited by the igniter 10 so that the dehydrogenation module 4 can be kept at the dehydrogenation temperature. At the same time, the function of the heating device 11 in the dehydrogenation module 4 is turned off, thereby reducing the consumption of electricity, and a small amount of hydrogen is burned to achieve the effect of heat preservation, so as to achieve the purpose of energy saving.

[0056] The dehydrogenation container is made of a high temperature resistant heat-insulating material. A temperature detection device can be provided in the dehydrogenation module 4 and a solenoid valve electrically connected to the temperature detection device can be provided in the reflux pipe, so that the amount of hydrogen can be adjusted according to the temperature in the dehydrogenation container. At the same time, a one-way valve 7 and a flashback preventer 12 can be provided to achieve one-way flow and safety protection of hydrogen.

[0057] Based on the above structure, the specific steps of generating hydrogen gas from the hydrogen-rich hydrogen oil of this embodiment and using the hydrogen gas are as follows:

[0058] (1) The hydrogen-rich oil in the first container 1 is delivered to the dehydrogenation container by the action of the infusion pump 3;

[0059] (2) The dehydrogenation container is heated by the heating device 11 and the dehydrogenation catalyst is arranged in the dehydrogenation container, so that the hydrogen-rich oil is separated into hydrogen gas and hydrogen-poor oil, and sent to the gas-liquid separation tank 5.

[0060] (3) The hydrogen-rich oil that was not separated thoroughly enough in the previous step is further separated thoroughly by the gas-liquid separation tank 5, the separated liquid enters the hydrogen-poor oil storage container and is collected, and the separated gas enters the adsorption device 6;

[0061] (4) The adsorption module is filled with adsorption material, and the very small amount of organic matter in the separated gas is adsorbed by the adsorption material, and pure hydrogen flows out. The pure hydrogen flows into the one-way valve 7 and the backfire preventer 12 to achieve one-way flow of hydrogen and safety protection;

[0062] (5) The hydrogen flowing out of the one-way valve 7 and the flashback arrester 12 flows into the stove 9 and is ignited by the igniter 10 to achieve combustion of the hydrogen;

[0063] (6) When the temperature in the dehydrogenation container reaches the preset temperature, the heating device 11 is turned off, and a portion of the hydrogen flowing out of the one-way valve 7 and the backfire preventer 12 is returned to the dehydrogenation container, and ignited by the igniter 10 so that the hydrogen can heat the dehydrogenation container and keep it at the dehydrogenation temperature, thereby achieving the effect of reducing energy consumption and emissions.

[0064] In summary, the hydrogen-rich oil is treated by the dehydrogenation module 4 to decompose it into hydrogen and hydrogen-poor oil. The hydrogen-poor oil is collected and subjected to hydrogen storage treatment to be converted into hydrogen-rich oil. The generated hydrogen can be directly introduced into the inverted stove 9 for combustion, thereby realizing the full use of the organic liquid hydrogen storage technology.

[0065] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or basic features of the present application.

Claims

1. A gas stove, characterized in that: It comprises a first container, a second container, an infusion pump, a dehydrogenation module, a valve and a stove; wherein the first container is used to store hydrogen-rich oil, and the second container is used to store hydrogen-poor oil; The first container and the second container are connected via a dehydrogenation module, the dehydrogenation module and the stove are connected via the valve, and the infusion pump is arranged between the first container and the dehydrogenation module.

2. The gas stove according to claim 1, characterized in that: A regulating valve is connected between the first container and the dehydrogenation module.

3. The gas stove according to claim 1, characterized in that: The dehydrogenation module comprises a dehydrogenation container, in which a heating device and a dehydrogenation catalyst are arranged.

4. The gas stove according to claim 3, characterized in that: The dehydrogenation catalyst includes a supported or unsupported catalyst having at least one of Pt, Pd, Ni and Ru metals as an active component.

5. The gas stove according to claim 1, characterized in that: It also includes a gas-liquid separation tank, which is arranged between the dehydrogenation module and the stove, the gas-liquid separation tank is communicated with the stove, and the gas-liquid separation tank is also communicated with the second container.

6. The gas stove according to claim 1, characterized in that: It also includes a one-way valve and a flashback preventer, wherein the one-way valve and the flashback preventer are arranged between the dehydrogenation module and the stove.

7. The gas stove according to claim 1, characterized in that: An adsorption device is connected between the dehydrogenation module and the stove, and an adsorption material is arranged in the adsorption device.

8. The gas stove according to claim 7, characterized in that: The adsorption material includes one or more mixtures of activated carbon, alumina and molecular sieve.

9. The gas stove according to claim 1, characterized in that: The stove is provided with a reflux pipe connected with the dehydrogenation module for passing the separated hydrogen to the dehydrogenation module, and the reflux pipe is provided with an igniter for igniting the hydrogen.

10. The gas stove according to claim 1, characterized in that: The hydrogen-rich oil comprises at least one mixture of hydrogenated N-ethylcarbazole, hydrogenated N-propylcarbazole, hydrogenated N-methylindole, hydrogenated dimethylindole, methylcyclohexane, and hydrogenated dibenzyltoluene.

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