Liquid hydrogen storage bottle empty emission hydrogen absorption treatment system and treatment method thereof

Abstract

The invention discloses a liquid hydrogen storage bottle empty discharge hydrogen absorption treatment system and a treatment method thereof.The treatment system comprises a liquid hydrogen storage bottle, a vapor hydrogen pressure detection component, a hydrogen discharge control valve, a hydrogen storage container, a hydrogen elimination reactor and an air inlet pipeline, and the liquid hydrogen storage bottle is sequentially connected with the hydrogen storage container and the hydrogen elimination reactor through the absorption pipeline; the liquid hydrogen storage bottle is used for storing liquid hydrogen, the hydrogen storage container is used for storing vaporized gaseous hydrogen, and the vapor hydrogen pressure detection part and the hydrogen discharge control valve are arranged on the absorption pipeline and located between the liquid hydrogen storage bottle and the hydrogen storage container. One end of the air inlet pipeline is connected to the position, between the hydrogen storage container and the hydrogen elimination reactor, of the absorption pipeline, and the air inlet pipeline is used for inputting air into the hydrogen elimination reactor to achieve the hydrogen elimination reaction of oxygen and hydrogen. The device is simple in structure and low in energy consumption, can realize effective treatment of vaporized hydrogen in the liquid hydrogen storage bottle, and avoids risks such as hydrogen accumulation caused by direct discharge of hydrogen.

Description

Technical Field

[0001] The present application relates to the technical field of hydrogen processing, and in particular to a system for accommodating and processing hydrogen discharged from empty liquid hydrogen storage bottles and a processing method thereof. Background Art

[0002] As global energy shortages and environmental problems become increasingly prominent, the development and utilization of low-carbon, clean, and renewable energy is imminent in all countries around the world. Hydrogen energy has the characteristics of wide sources, rich application scenarios, high calorific value, zero carbon emissions, and renewable energy. It is regarded as the energy with the greatest development potential in the 21st century. At present, hydrogen energy has been widely used in transportation, industry, electronics, and construction. At the same time, hydrogen energy can also be used as an energy reserve to solve the energy crisis. Therefore, the hydrogen energy industry will usher in a huge development opportunity. The hydrogen energy industry chain includes the production, storage, transportation, and application of hydrogen. Among them, the storage and transportation of hydrogen is the key link connecting the upstream and downstream of the hydrogen energy industry chain, and it is also the main bottleneck for the efficient storage and transportation and large-scale utilization of hydrogen energy. The storage and transportation methods of hydrogen energy include high-pressure gaseous hydrogen storage, low-temperature liquid hydrogen storage, and metal hydride hydrogen storage. Among them, low-temperature liquid hydrogen storage has the advantages of high mass hydrogen storage density, high filling efficiency, and good safety. It is an ideal hydrogen storage technology in the future.

[0003] The boiling point of liquid hydrogen is extremely low, and there will inevitably be vaporization losses during storage and transportation. When hydrogen vaporizes and accumulates to a certain pressure, it needs to be discharged through devices such as safety valves to avoid affecting the safety of liquid hydrogen bottles. Therefore, liquid hydrogen storage has high reliability requirements for storage devices such as liquid hydrogen storage bottles, and also puts forward high requirements for the discharge pressure and rate of vaporized hydrogen. It is necessary to evacuate the hydrogen within a certain reasonable pressure range. Some existing technologies will directly evacuate the vaporized hydrogen from liquid hydrogen storage bottles, but in closed or poorly ventilated places, hydrogen is prone to accumulation, bringing risks such as explosions. At the same time, studies have shown that hydrogen can react with ozone in the stratosphere to destroy the ozone layer, and hydrogen will react with hydroxyl radicals in the air, resulting in a decrease in hydroxyl radicals that react with methane in the atmosphere, exacerbating the greenhouse effect. There is also an existing technology that uses a liquid hydrogen recovery system. The liquid hydrogen recovery system includes a conversion module and a storage module. The vaporized hydrogen is converted back into liquid hydrogen through the conversion module and collected in the storage module to reduce the evaporation loss of liquid hydrogen. Although this technology can solve the problem of exhaust hydrogen directly entering the atmosphere, the required equipment is complex, the operation is cumbersome, the cost is high, and it is difficult to promote on a large scale. Summary of the invention

[0004] Based on this, it is necessary to provide a liquid hydrogen storage bottle empty hydrogen gas disposal processing system. The liquid hydrogen storage bottle empty hydrogen gas disposal processing system of the present invention has a simple structure and low energy consumption, and can regulate the gas output of the hydrogen path and the air path based on the target hydrogen concentration, so as to achieve effective treatment of vaporized hydrogen from the liquid hydrogen storage bottle, avoid the risks of hydrogen accumulation caused by direct hydrogen discharge, and reduce hydrogen emissions at the same time, avoid affecting the atmospheric environment, and have both economical, safe and environmentally friendly.

[0005] An embodiment of the present application provides a system for accommodating and processing hydrogen gas discharged from empty liquid hydrogen storage bottles.

[0006] A liquid hydrogen storage bottle empty exhaust hydrogen gas disposal processing system comprises a liquid hydrogen storage bottle, a steam-hydrogen pressure detection component, a hydrogen discharge control valve, a hydrogen storage container, a hydrogen elimination reactor and an air intake pipeline, wherein the liquid hydrogen storage bottle is sequentially connected to the hydrogen storage container and the hydrogen elimination reactor via a consumption pipeline, the liquid hydrogen storage bottle is used to store liquid hydrogen, the hydrogen storage container is used to store vaporized gaseous hydrogen, the steam-hydrogen pressure detection component and the hydrogen discharge control valve are arranged on the consumption pipeline and are located between the liquid hydrogen storage bottle and the hydrogen storage container, one end of the air intake pipeline is connected to a position on the consumption pipeline between the hydrogen storage container and the hydrogen elimination reactor, and the air intake pipeline is used to input air into the hydrogen elimination reactor to realize a hydrogen elimination reaction between oxygen and hydrogen.

[0007] In some of the embodiments, the liquid hydrogen storage bottle empty hydrogen disposal system also includes a hydrogen storage pressure detection component, which is arranged on the disposal pipeline and located between the hydrogen storage container and the hydrogen disposal reactor, and the hydrogen storage pressure detection component is close to the gas outlet end of the hydrogen storage container.

[0008] In some of the embodiments, the liquid hydrogen storage bottle empty hydrogen disposal processing system also includes a pulse width proportional valve, which is arranged on the disposal pipeline and located between the hydrogen storage container and the hydrogen disposal reactor, and the pulse width proportional valve is close to the gas outlet end of the hydrogen storage container.

[0009] In some of the embodiments, the liquid hydrogen storage bottle empty hydrogen disposal processing system also includes a hydrogen concentration detection component, which is arranged on the disposal pipeline and located between the hydrogen storage container and the hydrogen disposal reactor, and the hydrogen concentration detection component is close to the air inlet end of the hydrogen disposal reactor.

[0010] In some of the embodiments, the liquid hydrogen storage bottle empty hydrogen disposal processing system also includes a hydrogen disposal inlet pressure detection component, the hydrogen disposal inlet pressure detection component is arranged on the disposal pipeline and is located between the hydrogen storage container and the hydrogen disposal reactor, and the hydrogen disposal inlet pressure detection component is close to the air inlet end of the hydrogen disposal reactor.

[0011] In some of the embodiments, the liquid hydrogen storage bottle empty hydrogen gas disposal processing system further includes a hydrogen degassing device temperature detection component, and the hydrogen degassing device temperature detection component is connected to the hydrogen degassing reactor.

[0012] In some of the embodiments, the liquid hydrogen storage bottle empty hydrogen gas disposal processing system also includes a heat exchanger, and the heat exchanger is arranged on the disposal pipeline and located at the gas outlet end of the hydrogen disposal reactor.

[0013] In some of the embodiments, the liquid hydrogen storage bottle empty hydrogen gas disposal processing system also includes a flame arrester, which is arranged on the disposal pipeline and located between the hydrogen storage container and the hydrogen disposal reactor.

[0014] In some of the embodiments, the liquid hydrogen storage bottle empty hydrogen gas disposal and processing system further includes an air filter, and the air filter is disposed on the air intake pipe.

[0015] In some of the embodiments, the liquid hydrogen storage bottle empty hydrogen gas disposal processing system also includes a flow detection component, and the flow detection component is arranged on the air intake pipe.

[0016] In some of the embodiments, the liquid hydrogen storage bottle empty hydrogen gas disposal system also includes an air extraction pump, and the air extraction pump is arranged on the air intake pipe.

[0017] In some embodiments, the liquid hydrogen storage bottle empty hydrogen gas disposal processing system also includes a safety valve and a safety pipe, the safety pipe is connected to the disposal pipe at a position between the liquid hydrogen storage bottle and the hydrogen storage container, and the safety valve is connected to the safety pipe.

[0018] An embodiment of the present application also provides a method for accommodating and treating hydrogen gas discharged from a liquid hydrogen storage bottle.

[0019] A method for absorbing and treating hydrogen gas discharged from a liquid hydrogen storage bottle, using the above-mentioned system for absorbing and treating hydrogen gas discharged from a liquid hydrogen storage bottle, comprises the following steps:

[0020] Control the liquid hydrogen storage bottle to store liquid hydrogen, control the gas hydrogen pressure detection component to detect the pressure in the liquid hydrogen storage bottle and obtain a pressure value P1, and when the pressure value P1 ≥ the preset pressure value P, control the hydrogen exhaust control valve to open, so as to allow part of the gaseous hydrogen to enter the hydrogen storage container;

[0021] The gaseous hydrogen in the hydrogen storage container is controlled to enter the hydrogen removal reactor at a preset interval, and the air inlet pipeline is controlled to input air into the hydrogen removal reactor to realize the hydrogen removal reaction between oxygen and hydrogen, wherein the volume ratio of the input air to the volume of the gaseous hydrogen is not less than 2.7.

[0022] In some embodiments, the method for absorbing and treating the hydrogen discharged from the empty liquid hydrogen storage bottle further comprises the following steps:

[0023] The temperature detection component of the hydrogen removal reactor is controlled to detect the reaction temperature T1 in the hydrogen removal reactor. When the reaction temperature T1 is greater than or equal to the preset temperature T, the heat exchanger is controlled to be turned on to perform heat exchange and temperature reduction on the hydrogen removal reactor.

[0024] The above-mentioned liquid hydrogen storage bottle empty hydrogen gas disposal and treatment system can be applied to the field of liquid hydrogen storage and hydrogen supply. It adopts the mature technical route of hydrogen disposal by catalyst-catalyzed hydrogen-oxygen reaction to dispose of the hydrogen vaporization overpressure emission problem caused by the long-term storage or operation of the liquid hydrogen bottle. It can protect the atmospheric environment and avoid the risk of hydrogen accumulation and explosion caused by hydrogen emptying. At the same time, compared with the current recovery scheme of vaporized hydrogen in liquid hydrogen storage bottles, the present application has the advantages of less equipment used, simple operation and control, and low energy consumption.

[0025] The above-mentioned liquid hydrogen storage bottle empty hydrogen gas disposal and treatment system has a simple structure, is safe and friendly, and is efficient and long-lasting. The core of the hydrogen disposal in the present application is a hydrogen disposal reactor carrying Pd and Pt-based catalysts. By controlling the hydrogen and oxygen mixed gas with a certain hydrogen concentration to enter the hydrogen disposal reactor, hydrogen oxidation chemical reaction is carried out under the action of the catalyst to generate water, thereby achieving effective hydrogen disposal and treatment. The hydrogen discharged from the liquid hydrogen storage bottle can be disposed of, and the hydrogen disposal control is carried out based on the target mixed hydrogen concentration, thereby achieving slow, safe and stable treatment of hydrogen and avoiding the direct discharge of high-concentration hydrogen into the air.

[0026] Compared with the conventional technology, the liquid hydrogen storage bottle empty hydrogen gas disposal system of the present application has the following beneficial effects:

[0027] (1) After the hydrogen discharged from the liquid hydrogen storage tank is treated by the hydrogen removal system, the hydrogen concentration can be reduced to 100 ppm, which is 1 / 400 of the lower explosion limit of hydrogen, thus achieving effective treatment of hydrogen.

[0028] (2) The hydrogen storage container realizes the temporary storage of the exhausted hydrogen, and then the continuous and slow release of hydrogen is achieved through the adjustment of the pulse width proportional valve at the rear end, avoiding the temperature fluctuation of the hydrogen decomposition reactor caused by the intermittent opening of the hydrogen decomposition.

[0029] (3) The uniformity of hydrogen mixing based on the target hydrogen mixing concentration is achieved by controlling the duty cycle of the pulse width proportional valve and the speed of the vacuum pump.

[0030] (4) The heat exchanger is controlled to start when the dehydrogenation temperature is greater than a certain threshold value to prevent the gas temperature after the dehydrogenation reaction from being too high and affecting the equipment. The heat exchanger is not turned on when the temperature is within a reasonable threshold range, which can reduce energy consumption.

[0031] (5) The safety valve can be installed to directly release the pressure of the liquid hydrogen storage tank in emergency situations such as fire, violent collision, etc., to avoid safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0033] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings. In the following description, the same reference numerals represent the same parts.

[0034] FIG1 is a schematic diagram of a system for accommodating and treating hydrogen discharged from empty liquid hydrogen storage bottles according to an embodiment of the present invention;

[0035] FIG2 is a schematic diagram of a method for accommodating hydrogen gas discharged from a liquid hydrogen storage bottle according to an embodiment of the present invention.

[0036] Description of Reference Numerals

[0037] 10. Liquid hydrogen storage bottle empty hydrogen gas disposal treatment system; 100. Liquid hydrogen storage bottle; 200. Gas hydrogen pressure detection component; 300. Hydrogen discharge control valve; 400. Hydrogen gas storage container; 500. Hydrogen elimination reactor; 600. Air intake pipeline; 700. Hydrogen storage pressure detection component; 800. Pulse width proportional valve; 900. Hydrogen concentration detection component; 1000. Hydrogen elimination inlet pressure detection component; 1100. Hydrogen elimination device temperature detection component; 1200. Heat exchanger; 1300. Flame arrester; 1400. Air filter; 1500. Flow detection component; 1600. Vacuum pump; 1700. Safety valve; 1800. Safety pipeline; 1900. Disposal pipeline; 20. Hydrogen use equipment. DETAILED DESCRIPTION

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it 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.

[0041] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0042] In the description of the present invention, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0043] In this article, "optionally", "optional", "optional" means optional, that is, it means to be selected from any of the two parallel solutions of "yes" or "no". If there are multiple "optional" in a technical solution, unless otherwise specified and there is no contradiction or mutual restriction, each "optional" is independent. In this application, the descriptions such as "optionally contain" and "optionally include" mean "contain or not contain".

[0044] In the present application, when it comes to a numerical interval (i.e., a numerical range), unless otherwise specified, the distribution of the optional numerical values ​​in the numerical interval is considered to be continuous, and includes the two numerical endpoints (i.e., the minimum and maximum values) of the numerical interval, and each numerical value between the two numerical endpoints. Unless otherwise specified, when the numerical interval only refers to an integer in the numerical interval, it includes the two endpoint integers of the numerical range, and each integer between the two endpoints, which is equivalent to directly listing each integer. When multiple numerical ranges are provided to describe features or characteristics, these numerical ranges can be combined. In other words, unless otherwise specified, the numerical range disclosed in the present application should be understood to include any and all sub-ranges included therein. The "numerical value" in the numerical interval can be any quantitative value, such as a number, a percentage, a ratio, etc. "Numerical interval" allows for a broad range of quantitative intervals such as percentage intervals, ratio intervals, and ratio intervals.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0046] The embodiment of the present application provides a liquid hydrogen storage bottle empty hydrogen gas disposal treatment system to solve at least one of the following technical problems existing in the prior art: (1) hydrogen gas inevitably vaporizes during the storage and transportation of liquid hydrogen, and most of it is discharged into the atmosphere in the form of direct discharge, which will cause environmental problems as the amount of hydrogen used increases; (2) in a closed and poorly ventilated hydrogen use scenario, the direct discharge of hydrogen brings the risk of hydrogen accumulation; (3) recovering hydrogen by re-liquefaction of hydrogen, etc., the process equipment is complex and requires additional high-power consumption equipment such as liquid hydrogen pumps, which has the problem of high cost. The following will describe the liquid hydrogen storage bottle empty hydrogen gas disposal treatment system in conjunction with the accompanying drawings.

[0047] The liquid hydrogen storage bottle empty exhaust hydrogen gas disposal processing system 10 provided in the embodiment of the present application is exemplarily shown in FIG1 , which is a structural schematic diagram of the liquid hydrogen storage bottle empty exhaust hydrogen gas disposal processing system 10 provided in the embodiment of the present application. The liquid hydrogen storage bottle empty exhaust hydrogen gas disposal processing system 10 of the present application can be used for the purpose of disposing and processing the empty exhaust hydrogen gas of the liquid hydrogen storage bottle 100.

[0048] In order to more clearly illustrate the structure of the liquid hydrogen storage bottle empty hydrogen gas disposal and processing system 10, the liquid hydrogen storage bottle empty hydrogen gas disposal and processing system 10 will be introduced below with reference to the accompanying drawings.

[0049] For example, please refer to FIG1 , a liquid hydrogen storage bottle empty exhaust hydrogen gas disposal processing system 10 includes a liquid hydrogen storage bottle 100, a gas hydrogen pressure detection component 200, a hydrogen exhaust control valve 300, a hydrogen storage container 400, a hydrogen elimination reactor 500, and an air intake pipeline 600. Please refer to FIG1 , the liquid hydrogen storage bottle 100 can be connected to the hydrogen use equipment 20 on one hand, and connected to the consumption pipeline on the other hand.

[0050] Specifically, please refer to FIG. 1 , in which the liquid hydrogen storage bottle 100 is sequentially connected to the hydrogen gas storage container 400 and the hydrogen elimination reactor 500 through the consumption pipeline. The liquid hydrogen storage bottle 100 is used to store liquid hydrogen. The hydrogen gas storage container 400 is used to store vaporized gaseous hydrogen, and can also act as a buffer tank to prevent high-pressure vaporized hydrogen from directly entering the consumption pipeline and causing impact on the pulse width proportional valve 800. The vapor-hydrogen pressure detection component 200 and the hydrogen discharge control valve 300 are arranged on the consumption pipeline and are located between the liquid hydrogen storage bottle 100 and the hydrogen gas storage container 400. The vapor-hydrogen pressure detection component 200 is used to monitor the pressure of vaporized hydrogen in the liquid hydrogen storage bottle 100. The hydrogen discharge control valve 300 controls the discharge of vaporized hydrogen in the liquid hydrogen storage bottle 100. One end of the air intake pipe 600 is connected to the position between the hydrogen storage container 400 and the hydrogen removal reactor 500 on the consumption pipe, and the air intake pipe 600 is used to input air into the hydrogen removal reactor 500 to realize the hydrogen removal reaction between oxygen and hydrogen. The hydrogen removal reactor 500 provides a place for hydrogen and oxygen to react chemically, and the hydrogen removal reactor 500 contains a hydrogen removal catalyst.

[0051] The above-mentioned liquid hydrogen storage bottle empty hydrogen gas disposal and treatment system 10 can be applied to the field of liquid hydrogen storage and hydrogen supply, and adopts a mature technical route of hydrogen disposal by catalyzing hydrogen-oxygen reaction, and disposes of the hydrogen vaporization overpressure emission problem caused by long-term storage or operation of liquid hydrogen bottles. It can protect the atmospheric environment and avoid the risk of hydrogen accumulation and explosion caused by hydrogen emptying. At the same time, compared with the recovery scheme of vaporized hydrogen from liquid hydrogen storage bottles 100 in traditional technologies, the present application has the advantages of less equipment used, simple operation and control, and less energy consumption. The above-mentioned liquid hydrogen storage bottle empty hydrogen gas disposal and treatment system 10 has a simple structure, is safe and friendly, and is efficient and long-lasting. The core of the hydrogen disposal in the present application is a hydrogen disposal reactor 500 carrying a Pd or Pt-based catalyst. By controlling a hydrogen and oxygen mixed gas with a certain hydrogen concentration to enter the hydrogen disposal reactor 500, a hydrogen oxidation chemical reaction is carried out under the action of the catalyst to generate water, thereby achieving effective hydrogen disposal and treatment. The hydrogen discharged from the liquid hydrogen storage bottle 100 can be disposed of, and the hydrogen disposal control is performed based on the target mixed hydrogen concentration, thereby achieving slow, safe and stable treatment of hydrogen and avoiding direct discharge of high-concentration hydrogen into the air.

[0052] In some embodiments, the gas-hydrogen pressure detection component 200 is a gas-hydrogen pressure sensor.

[0053] In some embodiments, the hydrogen exhaust control valve 300 may be a hydrogen exhaust solenoid valve.

[0054] In some embodiments, as shown in FIG1 , the liquid hydrogen storage bottle empty hydrogen gas disposal processing system 10 further includes a hydrogen storage pressure detection component 700. The hydrogen storage pressure detection component 700 is disposed on the disposal pipeline and is located between the hydrogen gas storage container 400 and the hydrogen disposal reactor 500. The hydrogen storage pressure detection component 700 is close to the gas outlet end of the hydrogen gas storage container 400. The hydrogen storage pressure detection component 700 is used to monitor the pressure of the hydrogen gas storage container 400.

[0055] In some of the embodiments, the hydrogen storage pressure detection component 700 is a hydrogen storage pressure sensor.

[0056] In some of the embodiments, please refer to FIG. 1 , the liquid hydrogen storage bottle empty hydrogen gas disposal processing system 10 also includes a pulse width proportional valve 800. The pulse width proportional valve 800 is arranged on the disposal pipeline and is located between the hydrogen gas storage container 400 and the hydrogen disposal reactor 500, and the pulse width proportional valve 800 is close to the gas outlet of the hydrogen gas storage container 400. The pulse width proportional valve 800 controls the release amount of hydrogen by opening different duty ratios. In the present application, the pulse width proportional valve 800 (Pulse Width Modulation Proportional Valve, PWM Proportional Valve) is a valve that uses pulse width modulation technology to control the flow rate of a fluid (such as a gas or a liquid). The pulse width proportional valve 800 adjusts the valve opening by changing the width (ie, the duty ratio) of the pulse signal applied to the electromagnetic coil, thereby achieving precise control of the fluid flow rate. The pulse width proportional valve 800 of the present application has the characteristics of high precision, fast response speed, and strong adaptability.

[0057] In some embodiments, as shown in FIG. 1 , the liquid hydrogen storage bottle empty hydrogen gas disposal processing system 10 further includes a hydrogen concentration detection component 900. The hydrogen concentration detection component 900 is disposed on the disposal pipeline and is located between the hydrogen storage container 400 and the hydrogen disposal reactor 500. The hydrogen concentration detection component 900 is close to the gas inlet end of the hydrogen disposal reactor 500. The hydrogen concentration detection component 900 is used to monitor the hydrogen concentration entering the hydrogen disposal reactor 500 after hydrogen mixing.

[0058] In some of the embodiments, the hydrogen concentration detection component 900 is a hydrogen concentration sensor.

[0059] In some embodiments, as shown in FIG1 , the liquid hydrogen storage bottle empty hydrogen gas disposal processing system 10 further includes a hydrogen elimination inlet pressure detection component 1000. The hydrogen elimination inlet pressure detection component 1000 is arranged on the disposal pipeline and is located between the hydrogen gas storage container 400 and the hydrogen elimination reactor 500. The hydrogen elimination inlet pressure detection component 1000 is close to the gas inlet end of the hydrogen elimination reactor 500. The hydrogen elimination inlet pressure detection component 1000 is used to monitor the pressure of the hydrogen mixed gas at the inlet of the hydrogen elimination reactor 500.

[0060] In some of the embodiments, the hydrogen removal inlet pressure detection component 1000 is a hydrogen removal device temperature detection component 1100 .

[0061] In some embodiments, as shown in FIG1 , the liquid hydrogen storage tank empty exhaust hydrogen gas disposal processing system 10 further includes a hydrogen depletion device temperature detection component 1100. The hydrogen depletion device temperature detection component 1100 is connected to the hydrogen depletion reactor 500. The hydrogen depletion device temperature detection component 1100 is used to monitor the temperature of the reaction during hydrogen depletion.

[0062] In some embodiments, the hydrogen dissipator temperature detection component 1100 is a hydrogen dissipator temperature sensor.

[0063] In some embodiments, as shown in FIG1 , the liquid hydrogen storage tank empty hydrogen gas disposal processing system 10 further includes a heat exchanger 1200. The heat exchanger 1200 is disposed on the disposal pipeline and is located at the gas outlet end of the hydrogen disposal reactor 500.

[0064] In some embodiments, as shown in FIG. 1 , the liquid hydrogen storage tank empty exhaust hydrogen gas disposal processing system 10 further includes a flame arrester 1300. The flame arrester 1300 is arranged on the disposal pipeline and is located between the hydrogen storage container 400 and the hydrogen disposal reactor 500. The flame arrester 1300 prevents the hydrogen disposal reactor 500 from generating sparks or fire in an emergency to ignite the front hydrogen.

[0065] In some embodiments, as shown in FIG. 1 , the liquid hydrogen storage bottle empty hydrogen gas disposal processing system 10 further includes an air filter 1400. The air filter 1400 is disposed on the air intake pipe 600. The air filter 1400 is used to filter impurities mixed in the air in the air intake pipe 600 to prevent contamination of the catalyst in the hydrogen elimination reactor 500 and avoid affecting the catalytic efficiency.

[0066] In some embodiments, as shown in FIG1 , the liquid hydrogen storage bottle empty hydrogen gas disposal processing system 10 further includes a flow detection component 1500. The flow detection component 1500 is disposed on the air intake pipeline 600. The flow detection component 1500 is used to monitor the intake flow of the air.

[0067] In some of these embodiments, the flow detection component 1500 can be a flow meter.

[0068] In some embodiments, as shown in FIG1 , the liquid hydrogen storage bottle empty exhaust hydrogen gas disposal processing system 10 further includes an air pump 1600. The air pump 1600 is disposed on the air intake pipe 600. The air pump 1600 is used to extract air, and the air intake volume can be controlled by adjusting the rotation speed.

[0069] In some embodiments, as shown in FIG. 1 , the liquid hydrogen storage bottle empty hydrogen gas disposal processing system 10 further includes a safety valve 1700 and a safety pipe 1800. The safety pipe 1800 is connected to the disposal pipe between the liquid hydrogen storage bottle 100 and the hydrogen gas storage container 400, and the safety valve 1700 is connected to the safety pipe 1800. In the present application, the provision of the safety valve 1700 can realize direct pressure relief of the liquid hydrogen storage bottle 100 in emergency situations such as fire, severe collision, etc., to avoid safety accidents.

[0070] In some embodiments, the safety valve 1700 may be a manual valve or a solenoid valve. Preferably, the safety valve 1700 is a solenoid valve.

[0071] An embodiment of the present application also provides a method for absorbing and treating the hydrogen gas discharged from the liquid hydrogen storage bottle 100.

[0072] It should be noted that, in this article, unless otherwise specified, each reaction step can be carried out in the order described herein, or can be carried out in a non-sequential manner. For example, other steps may be included between each reaction step, and the order of the reaction steps may also be appropriately swapped. This can be determined by the technician based on conventional knowledge and experience. Preferably, the reaction method herein is carried out sequentially.

[0073] A method for absorbing and treating the hydrogen discharged from a liquid hydrogen storage bottle 100, using the above-mentioned liquid hydrogen storage bottle empty exhaust hydrogen disposal system 10, comprises the following steps:

[0074] Control the liquid hydrogen storage bottle 100 to store liquid hydrogen, control the gas hydrogen pressure detection component 200 to detect the pressure in the liquid hydrogen storage bottle 100 and obtain a pressure value P1, and when the pressure value P1 ≥ the preset pressure value P, control the hydrogen exhaust control valve 300 to open, so as to allow part of the gaseous hydrogen to enter the hydrogen storage container 400;

[0075] According to the preset interval time, the gaseous hydrogen in the hydrogen storage container 400 is controlled to enter the hydrogen elimination reactor 500, and the air intake pipe 600 is controlled to input air into the hydrogen elimination reactor 500 to realize the hydrogen elimination reaction between oxygen and hydrogen, wherein the volume ratio of the input air to the volume of the gaseous hydrogen is not less than 2.7; for example, the volume ratio of the input air to the volume of the gaseous hydrogen is 6:2~10:2. It should be noted that a catalyst is provided in the hydrogen elimination reactor 500. Preferably, the volume of the input air is slightly larger than the actual volume required for the reaction with the gaseous hydrogen to ensure that the hydrogen can react completely and achieve the purpose of complete hydrogen elimination.

[0076] It is not difficult to understand that in some embodiments, oxygen can be input into the hydrogen removal reactor 500 by controlling the air intake pipe 600. At this time, the molar ratio of the input oxygen to the gaseous hydrogen is 1:2. In order to reduce costs, the air intake pipe 600 is generally controlled to input air into the hydrogen removal reactor 500.

[0077] In some embodiments, the method for absorbing and treating the hydrogen discharged from the liquid hydrogen storage bottle 100 further includes the following steps:

[0078] The hydrogen removal reactor temperature detection component 1100 is controlled to detect the reaction temperature T1 in the hydrogen removal reactor 500 . When the reaction temperature T1 ≥ the preset temperature T, the heat exchanger 1200 is controlled to be turned on to perform heat exchange and temperature reduction on the hydrogen removal reactor 500 .

[0079] In the present application, when the hydrogen in the liquid hydrogen storage bottle 100 vaporizes and exceeds a certain pressure, the hydrogen discharge control valve 300 is controlled to open, and the vaporized hydrogen enters the hydrogen storage container 400. The hydrogen storage container 400 plays a role in buffering the discharge of vaporized hydrogen, and can temporarily store a portion of the vaporized hydrogen to reduce the pressure of the hydrogen in the liquid hydrogen storage bottle 100. The hydrogen in the hydrogen storage container 400 enters the hydrogen removal reactor 500 through the subsequent gas mixing device, and a hydrogen-oxygen reaction is carried out in the hydrogen removal reactor 500 to achieve the disposal of the tail exhaust hydrogen.

[0080] Example 1

[0081] This embodiment provides a system 10 for accommodating and treating hydrogen gas discharged from empty liquid hydrogen storage bottles.

[0082] Please refer to FIG. 1 , a liquid hydrogen storage bottle empty exhaust hydrogen gas disposal system 10 includes a liquid hydrogen storage bottle 100, a gas hydrogen pressure detection component 200, a hydrogen discharge control valve 300, a hydrogen storage container 400, a hydrogen elimination reactor 500, an air intake pipeline 600, a hydrogen storage pressure detection component 700, a pulse width proportional valve 800, a hydrogen concentration detection component 900, a hydrogen elimination inlet pressure detection component 1000, a hydrogen elimination device temperature detection component 1100, a heat exchanger 1200, a flame arrester 1300, an air filter 1400, a flow detection component 1500, an air pump 1600, a safety valve 1700 and a safety pipeline 1800. Among them, the liquid hydrogen storage bottle 100 is connected to the hydrogen storage container 400 and the hydrogen elimination reactor 500 in sequence through the absorption pipeline. The liquid hydrogen storage bottle 100 is used to store liquid hydrogen. The hydrogen storage container 400 is used to store vaporized gaseous hydrogen. The gas-hydrogen pressure detection component 200 and the hydrogen discharge control valve 300 are arranged on the consumption pipeline and located between the liquid hydrogen storage bottle 100 and the hydrogen storage container 400. The hydrogen storage pressure detection component 700, the pulse width proportional valve 800, the flame arrester 1300, the hydrogen concentration detection component 900, and the hydrogen consumption inlet pressure detection component 1000 are arranged in sequence between the hydrogen storage container 400 and the hydrogen consumption reactor 500. The hydrogen storage pressure detection component 700 is close to the gas outlet end of the hydrogen storage container 400. The pulse width proportional valve 800 is close to the gas outlet end of the hydrogen storage container 400. The air intake pipeline 600 is provided with an air filter 1400, a flow detection component 1500, and an air pump 1600. One end of the air intake pipe 600 is connected to the position between the hydrogen storage container 400 and the hydrogen removal reactor 500 on the consumption pipeline, and the air intake pipe 600 is specifically connected to the position between the pulse width proportional valve 800 and the flame arrester 1300. The hydrogen removal device temperature detection component 1100 is connected to the hydrogen removal reactor 500. The heat exchanger 1200 is arranged on the consumption pipeline and is located at the gas outlet end of the hydrogen removal reactor 500. The safety pipeline 1800 is connected to the position between the liquid hydrogen storage bottle 100 and the hydrogen storage container 400 on the consumption pipeline, and the safety valve 1700 is connected to the safety pipeline 1800.

[0083] The liquid hydrogen storage bottle empty hydrogen disposal and treatment system 10 of the present embodiment uses few equipments, has simple operation and control, and consumes little energy. It can adopt the mature technical route of hydrogen disposal by catalyzing the hydrogen-oxygen reaction, and can dispose of the hydrogen vaporization overpressure emission problem caused by the long-term storage or operation of the liquid hydrogen bottle, which can protect the atmospheric environment and avoid the risk of hydrogen accumulation and explosion caused by the empty hydrogen discharge.

[0084] Example 2

[0085] This embodiment provides a method for accommodating and treating the hydrogen gas discharged from a liquid hydrogen storage bottle 100.

[0086] The method for accommodating and treating the hydrogen gas discharged from the empty liquid hydrogen storage bottle 100 of the present embodiment adopts the system 10 for accommodating and treating the hydrogen gas discharged from the empty liquid hydrogen storage bottle in the above-mentioned embodiment 1.

[0087] The method for absorbing and treating the hydrogen discharged from the empty liquid hydrogen storage bottle 100 of this embodiment includes the following steps, as shown in FIG. 2 :

[0088] S1. Control the liquid hydrogen storage bottle 100 to store liquid hydrogen, control the gas-hydrogen pressure detection component 200 to detect the pressure in the liquid hydrogen storage bottle 100 and obtain a pressure value P1. When the pressure value P1 ≥ the preset pressure value P, control the hydrogen exhaust control valve 300 to open, so as to allow part of the gaseous hydrogen to enter the hydrogen storage container 400.

[0089] S2. According to the preset interval time, the gaseous hydrogen in the hydrogen storage container 400 is controlled to enter the hydrogen removal reactor 500, and the air intake pipe 600 is controlled to input air into the hydrogen removal reactor 500 to realize the hydrogen removal reaction between oxygen and hydrogen. A catalyst is arranged in the hydrogen removal reactor 500. Among them, the pulse width proportional valve 800 and the air pump 1600 are controlled to perform corresponding pulse width modulation and speed control based on the target mixed hydrogen concentration. The volume ratio of the input air to the volume of the gaseous hydrogen is 2.7. The mixed gas enters the hydrogen removal reactor 500, and the hydrogen oxidation chemical reaction occurs under the action of the catalyst.

[0090] S3, control the hydrogen removal temperature detection component 1100 to detect the reaction temperature T1 in the hydrogen removal reactor 500, monitor the internal temperature of the hydrogen removal reactor 500 and perform signal feedback processing during the hydrogen removal reaction, adjust the mixed hydrogen concentration, prevent the catalyst in the hydrogen removal reactor 500 from being deactivated due to excessively high temperature, and prevent the hydrogen removal efficiency from being low due to excessively low temperature. When the reaction temperature T1 ≥ the preset temperature T, control the heat exchanger 1200 to open to heat and cool the hydrogen removal reactor 500, and discharge the gas after the reaction in the hydrogen removal reactor 500 after cooling.

[0091] In summary, the liquid hydrogen storage tank empty hydrogen gas disposal processing system 10 of the present application has the following beneficial effects compared with the conventional technology:

[0092] (1) After the hydrogen discharged from the liquid hydrogen storage tank is treated by the hydrogen removal system, the hydrogen concentration can be reduced to 100 ppm, which is 1 / 400 of the lower explosion limit of hydrogen, thus achieving effective treatment of hydrogen.

[0093] (2) The hydrogen storage container 400 realizes temporary storage of the exhausted hydrogen, and then the pulse width proportional valve 800 at the rear end is adjusted to realize the continuous and slow release of hydrogen, thereby avoiding the temperature fluctuation of the hydrogen removal reactor 500 caused by the intermittent opening of the hydrogen removal.

[0094] (3) By controlling the duty cycle of the pulse width proportional valve at 800 and the speed of the vacuum pump at 1600, the uniformity of hydrogen mixing based on the target hydrogen mixing concentration is achieved, thereby improving the treatment effect.

[0095] (4) The heat exchanger 1200 is controlled to start when the dehydrogenation temperature is greater than a certain threshold value to prevent the gas temperature after the dehydrogenation reaction from being too high and affecting the equipment. When the temperature is within a reasonable threshold range, the heat exchanger 1200 is not turned on, which can reduce energy consumption.

[0096] (5) The safety valve 1700 can be provided to directly release the pressure of the liquid hydrogen storage bottle 100 in emergency situations such as fire, severe collision, etc., to avoid safety accidents.

[0097] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0098] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0099] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A liquid hydrogen storage tank empty hydrogen gas disposal system, characterized in that: It comprises a liquid hydrogen storage bottle, a steam-hydrogen pressure detection component, a hydrogen discharge control valve, a hydrogen storage container, a hydrogen elimination reactor and an air intake pipeline. The liquid hydrogen storage bottle is connected to the hydrogen storage container and the hydrogen elimination reactor in sequence through a consumption pipeline. The liquid hydrogen storage bottle is used to store liquid hydrogen, and the hydrogen storage container is used to store vaporized gaseous hydrogen. The steam-hydrogen pressure detection component and the hydrogen discharge control valve are arranged on the consumption pipeline and located between the liquid hydrogen storage bottle and the hydrogen storage container. One end of the air intake pipeline is connected to a position on the consumption pipeline between the hydrogen storage container and the hydrogen elimination reactor. The air intake pipeline is used to input air into the hydrogen elimination reactor to realize a hydrogen elimination reaction between oxygen and hydrogen.

2. The liquid hydrogen storage bottle empty hydrogen gas disposal processing system according to claim 1 is characterized in that: The liquid hydrogen storage bottle empty hydrogen disposal system also includes a hydrogen storage pressure detection component, which is arranged on the disposal pipeline and located between the hydrogen storage container and the hydrogen disposal reactor. The hydrogen storage pressure detection component is close to the gas outlet end of the hydrogen storage container.

3. The liquid hydrogen storage bottle empty hydrogen gas disposal processing system according to claim 1 is characterized in that: The liquid hydrogen storage bottle empty hydrogen disposal processing system also includes a pulse width proportional valve, which is arranged on the disposal pipeline and located between the hydrogen storage container and the hydrogen disposal reactor. The pulse width proportional valve is close to the gas outlet end of the hydrogen storage container.

4. The liquid hydrogen storage bottle empty hydrogen gas disposal processing system according to claim 1 is characterized in that: The liquid hydrogen storage bottle empty hydrogen disposal processing system also includes a hydrogen concentration detection component, which is arranged on the disposal pipeline and located between the hydrogen storage container and the hydrogen disposal reactor. The hydrogen concentration detection component is close to the air inlet end of the hydrogen disposal reactor.

5. The liquid hydrogen storage bottle empty hydrogen gas disposal processing system according to claim 1 is characterized in that: The liquid hydrogen storage bottle empty hydrogen disposal processing system also includes a hydrogen disposal inlet pressure detection component, which is arranged on the disposal pipeline and located between the hydrogen storage container and the hydrogen disposal reactor. The hydrogen disposal inlet pressure detection component is close to the air inlet end of the hydrogen disposal reactor.

6. The liquid hydrogen storage bottle empty hydrogen gas disposal processing system according to claim 1 is characterized in that: The liquid hydrogen storage tank empty hydrogen gas disposal processing system also meets at least one of the following conditions: (1) The liquid hydrogen storage tank empty hydrogen gas disposal processing system further includes a hydrogen degassing device temperature detection component, and the hydrogen degassing device temperature detection component is connected to the hydrogen degassing reactor; (2) The liquid hydrogen storage tank empty hydrogen gas disposal system also includes a heat exchanger, which is arranged on the disposal pipeline and located at the gas outlet end of the hydrogen disposal reactor.

7. The liquid hydrogen storage bottle empty hydrogen gas disposal processing system according to claim 1 is characterized in that: The liquid hydrogen storage tank empty hydrogen gas disposal processing system also meets at least one of the following conditions: (1) The liquid hydrogen storage tank empty hydrogen gas disposal processing system further includes a flame arrester, which is arranged on the disposal pipeline and located between the hydrogen storage container and the hydrogen disposal reactor; (2) The liquid hydrogen storage bottle empty hydrogen gas disposal and treatment system further includes an air filter, and the air filter is arranged on the air intake pipe; (3) The liquid hydrogen storage bottle empty hydrogen gas disposal processing system further includes a flow detection component, and the flow detection component is arranged on the air intake pipe; (4) The liquid hydrogen storage bottle empty hydrogen gas disposal system also includes an air extraction pump, which is arranged on the air intake pipe.

8. The liquid hydrogen storage bottle empty hydrogen gas disposal processing system according to any one of claims 1 to 7, characterized in that: The liquid hydrogen storage bottle empty hydrogen gas disposal processing system also includes a safety valve and a safety pipeline. The safety pipeline is connected to the disposal pipeline at a position between the liquid hydrogen storage bottle and the hydrogen gas storage container, and the safety valve is connected to the safety pipeline.

9. A method for absorbing and treating hydrogen gas discharged from a liquid hydrogen storage bottle, characterized in that: The liquid hydrogen storage bottle empty hydrogen gas disposal processing system according to any one of claims 1 to 8 comprises the following steps: Control the liquid hydrogen storage bottle to store liquid hydrogen, control the gas hydrogen pressure detection component to detect the pressure in the liquid hydrogen storage bottle and obtain a pressure value P1, and when the pressure value P1 ≥ the preset pressure value P, control the hydrogen exhaust control valve to open, so as to allow part of the gaseous hydrogen to enter the hydrogen storage container; The gaseous hydrogen in the hydrogen storage container is controlled to enter the hydrogen removal reactor at a preset interval, and the air inlet pipeline is controlled to input air into the hydrogen removal reactor to realize the hydrogen removal reaction between oxygen and hydrogen, wherein the volume ratio of the input air to the volume of the gaseous hydrogen is not less than 2.

7.

10. The method for accommodating and treating hydrogen discharged from empty liquid hydrogen storage bottles according to claim 9, characterized in that: The method for absorbing and treating the hydrogen discharged from the empty liquid hydrogen storage bottle further comprises the following steps: The temperature detection component of the hydrogen removal reactor is controlled to detect the reaction temperature T1 in the hydrogen removal reactor. When the reaction temperature T1 ≥ the preset temperature T, the heat exchanger is controlled to be turned on to perform heat exchange and temperature reduction on the hydrogen removal reactor.

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