Heat supply system based on organic liquid hydrogen storage and hydrogen catalytic oxidation technology

Abstract

The utility model is suitable for the technical field of heat supply systems, and provides a heat supply system based on an organic liquid hydrogen storage and hydrogen catalytic oxidation technology, which comprises a dehydrogenation reactor and a catalytic oxidation reactor, the liquid inlet end of the dehydrogenation reactor is connected with a liquid inlet pump, the dehydrogenation reactor is also connected with a condenser and a liquid discharge controller, the condenser is connected with a gas-liquid separator, and the gas-liquid separator is simultaneously connected with the catalytic oxidation reactor and the liquid discharge controller; and the catalytic oxidation reactor is connected with an air blower and a first heat exchanger. According to the device, safe, efficient, clean and flexible heat supply is achieved while the basic heating comfort requirement is met, and the hydrogen energy heat supply application scene is greatly expanded.

Description

Technical Field

[0001] This utility model belongs to the technical field of heating systems, and in particular relates to a heating system based on organic liquid hydrogen storage and hydrogen catalytic oxidation technology. Background Technology

[0002] Heating technology converts energy into heat energy, which is then transferred to media such as air and water to provide warmth or heat other objects. Heating technology mainly includes energy supply technology, heat conversion technology, and heat exchange technology.

[0003] Currently, the main energy supply methods for heating technology include electricity, coal, natural gas, liquefied petroleum gas, gasoline, diesel, etc. The heat conversion technologies include electric heating materials, direct combustion heating, catalytic combustion heating, etc. The heat dissipation methods include radiation heat dissipation, natural convection heat dissipation, forced convection heat dissipation, or a combination of multiple methods, to transfer heat to space or other objects.

[0004] Heating technologies powered by electricity suffer from problems such as poor safety, short lifespan, limited power, high operating costs, significant impact on the power grid, and dry air after prolonged use. Heating technologies powered by traditional fossil fuels pose safety risks such as explosions and poisoning due to gas (liquid) leaks, burns from high temperatures, equipment malfunctions and reduced lifespan due to high-temperature flame erosion, and emissions of greenhouse gases such as carbon dioxide, as well as toxic and harmful substances such as carbon monoxide, nitrogen oxides, VOCs, and dust. Heating technologies based on gaseous hydrogen and direct combustion suffer from poor safety, nitrogen oxide emissions, and short burner lifespan due to extremely high flame temperatures, limiting their application scenarios. Utility Model Content

[0005] The purpose of this utility model embodiment is to provide a heating system based on organic liquid hydrogen storage and hydrogen catalytic oxidation technology, which aims to solve the problems mentioned in the background art.

[0006] This utility model embodiment is implemented as follows: a heating system based on organic liquid hydrogen storage and hydrogen catalytic oxidation technology includes a dehydrogenation reactor and a catalytic oxidation reactor.

[0007] The dehydrogenation reactor is connected to a liquid inlet pump at its inlet end. The dehydrogenation reactor is also connected to a condenser and a liquid discharge controller. The condenser is connected to a gas-liquid separator. The gas-liquid separator is connected to both the catalytic oxidation reactor and the liquid discharge controller.

[0008] The catalytic oxidation reactor is connected to a blower and a first heat exchanger.

[0009] In a further technical solution, the first heat exchanger exchanges heat with the user end through heat exchange medium a.

[0010] In a further technical solution, a second heat exchanger is connected between the inlet pump and the dehydrogenation reactor, and the drain controller is also connected to the second heat exchanger.

[0011] In a further technical solution, the catalytic oxidation reactor and the dehydrogenation reactor exchange heat through heat exchange medium b.

[0012] In a further technical solution, a start-up burner is also provided between the catalytic oxidation reactor and the dehydrogenation reactor.

[0013] In a further technical solution, a temperature sensor is installed at the outlet of the catalytic oxidation reactor to monitor the temperature T1 of the heat exchange medium b.

[0014] This utility model provides a heating system based on organic liquid hydrogen storage and hydrogen catalytic oxidation technology, which has the following advantages:

[0015] (1) Clean and pollution-free: It does not require the consumption of traditional fossil energy sources such as gas, oil, and coal, which is of great significance for reconstructing the energy structure;

[0016] (2) High safety: It eliminates the prominent problems that restrict the widespread application of hydrogen energy, such as pressure vessels, open flame combustion, and hazardous chemical storage, which exist in traditional hydrogen energy heating technology, and can promote the application of hydrogen energy.

[0017] (3) Good comfort: The water produced during the hydrogen catalytic oxidation process can be used to humidify the indoor air, avoiding the dryness caused by long-term use of traditional heating technology, and effectively improving comfort;

[0018] (4) Easy to use: It uses non-hazardous chemical liquid energy, and there are no special restrictions on storage and transportation. There are no restricted areas and it does not rely on infrastructure. Attached Figure Description

[0019] Figure 1 A schematic diagram of a heating system based on organic liquid hydrogen storage and hydrogen catalytic oxidation technology is provided for an embodiment of this utility model;

[0020] Figure 2 A flowchart illustrating the operation of a heating system based on organic liquid hydrogen storage and hydrogen catalytic oxidation technology, provided for an embodiment of this utility model.

[0021] In the attached diagram: 1. First heat exchanger; 2. Blower; 3. Catalytic oxidation reactor; 4. Start-up burner; 5. Dehydrogenation reactor; 6. Condenser; 7. Gas-liquid separator; 8. Drainage controller; 9. Second heat exchanger; 10. Inlet pump. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0024] like Figure 1 As shown, a heating system based on organic liquid hydrogen storage and hydrogen catalytic oxidation technology is provided in one embodiment of the present invention, including a dehydrogenation reactor 5 and a catalytic oxidation reactor 3;

[0025] The dehydrogenation reactor 5 is connected to the liquid inlet end by a liquid inlet pump 10. The dehydrogenation reactor 5 is also connected to a condenser 6 and a liquid discharge controller 8. The condenser 6 is connected to a gas-liquid separator 7. The gas-liquid separator 7 is connected to both the catalytic oxidation reactor 3 and the liquid discharge controller 8.

[0026] The catalytic oxidation reactor 3 is connected to a blower 2 and a first heat exchanger 1.

[0027] In this embodiment of the invention, during use, the inlet pump 10 pumps the safe hydrogen-containing organic liquid into the dehydrogenation reactor 5, where it undergoes a catalytic dehydrogenation reaction, decomposing into hydrogen and the safe organic liquid. The hydrogen is used as fuel in the catalytic oxidation reactor, and the safe organic liquid is recycled and reused. The hydrogen enters the catalytic oxidation reactor and undergoes a catalytic oxidation reaction with oxygen in the air. This reaction is exothermic and can provide external heat, while simultaneously generating water. The heat is transferred to the user end through a heat exchanger, ultimately achieving the function of safe heating.

[0028] like Figure 1 As shown, in a preferred embodiment of the present invention, the first heat exchanger 1 exchanges heat with the user end through heat exchange medium a.

[0029] like Figure 1 As shown, in a preferred embodiment of the present invention, a second heat exchanger 9 is connected between the inlet pump 10 and the dehydrogenation reactor 5, and the drain controller 8 is also connected to the second heat exchanger 9.

[0030] In this embodiment of the invention, during the reaction process, before the inlet pump 10 pumps the safe hydrogen-containing organic liquid into the dehydrogenation reactor 5, it first pumps the safe hydrogen-containing organic liquid into the heat exchanger 9, so that the safe hydrogen-containing organic liquid exchanges heat with the high-temperature safe organic liquid discharged by the drain controller 8, achieving three objectives: firstly, to preheat the safe hydrogen-containing organic liquid to meet the temperature requirements of the subsequent dehydrogenation reaction; secondly, to recover energy by using the heat of the safe organic liquid to preheat the safe hydrogen-containing organic liquid, reducing energy waste; and thirdly, to reduce the temperature of the safe organic liquid to avoid damage to the container caused by high temperature.

[0031] like Figure 1 As shown, in a preferred embodiment of the present invention, the catalytic oxidation reactor 3 and the dehydrogenation reactor 5 exchange heat through heat exchange medium b, which can transfer the heat generated by the catalytic oxidation reactor 3 to the dehydrogenation reactor 5, thereby providing the required temperature for the hydrogen release reaction of the dehydrogenation reactor 5.

[0032] like Figure 1 As shown, in a preferred embodiment of the present invention, a start-up burner 4 is also provided between the catalytic oxidation reactor 3 and the dehydrogenation reactor 5.

[0033] In this embodiment of the invention, in the initial state, the starting fuel (such as liquefied butane, ethanol, etc.) is delivered to the starting burner 4, ignited in the air, and heat is generated and input into the dehydrogenation reactor 5 as starting heat. After the dehydrogenation reactor 5 stably produces hydrogen, the starting burner 4 can be controlled to shut down.

[0034] like Figure 2 As shown in the preferred embodiment of this utility model, the stability of the catalytic oxidation reaction temperature has a significant impact on the smooth progress of the dehydrogenation reaction and the stability of the user-side heating temperature. Therefore, it is necessary to control the reaction temperature. The air blown into the catalytic oxidation reactor 3 by the blower 2 not only meets the reaction requirements but also serves as a cooling medium to control the reaction temperature. Increased airflow leads to a decrease in temperature, while decreased airflow leads to an increase in temperature. Therefore, a temperature sensor is installed at the outlet of the catalytic oxidation reactor 3. This temperature can be approximated as the catalytic oxidation reaction temperature, thereby allowing real-time monitoring of the temperature T1 of the heat exchange medium b. The catalytic oxidation reaction temperature setpoint T is set... sp1 The deviation from the measured temperature T1 of the heat exchange medium b is calculated using PID (this can be achieved using existing technology and will not be elaborated in detail). The output of the PID calculation is used as the adjustment input for the speed of blower 2, thereby indirectly adjusting the cold air intake flow rate and completing the adjustment of the catalytic oxidation reaction temperature.

[0035] The system operation process is as follows:

[0036] 1) In the initial state, the starting fuel (such as liquefied butane, ethanol, etc.) enters the starter burner 4, is ignited in the air, generates heat, and is input into the dehydrogenation reactor 5 as start-up heat. After the dehydrogenation reactor 5 stably produces hydrogen, the starter burner 4 is controlled to shut down.

[0037] 2) The inlet pump 10 draws in safe hydrogen-containing organic liquid and pumps it into the second heat exchanger 9 to exchange heat with the discharged high-temperature safe organic liquid.

[0038] 3) The preheated safe hydrogen-containing organic liquid enters the dehydrogenation reactor 5, where it decomposes under the action of a catalyst and heat (from the catalytic oxidation reactor 3) to produce high-temperature hydrogen and high-temperature safe organic liquid at a temperature of about 300°C.

[0039] 4) The high-temperature hydrogen contains some safe organic liquid vapor. After the mixed gas enters the condenser 6 to cool down, the safe organic liquid is fully liquefied and separated from the hydrogen. At the same time, the safe organic liquid enters the second heat exchanger 9 after passing through the drain controller 8, and exchanges heat with the safe hydrogen-containing organic liquid at room temperature. The function of the drain controller 8 is to control the liquid level in the dehydrogenation reactor 5 to prevent system fluctuations caused by excessively high or low liquid levels.

[0040] 5) The separated hydrogen enters the catalytic oxidation reactor 3, while the ambient air enters the catalytic oxidation reactor 3 under the action of the blower 2. Oxygen and hydrogen react on the surface of the catalyst to produce water and release heat.

[0041] 6) The heat generated by the catalytic oxidation reactor 3 is divided into two parts: one part of the heat is input into the dehydrogenation reactor 5 through the heat exchange medium b (high temperature heat transfer oil, etc.) to provide heat for the dehydrogenation reaction; the other part of the heat is carried out by the hot tail gas composed of residual air and water vapor, and then enters the first heat exchanger 1 to transfer the heat to the heat exchange medium a (the heat exchange method can be convection, conduction, thermal radiation, etc., and the medium can be air, water, etc.) to provide heat to users and realize the safe heating function.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A heat supply system based on organic liquid hydrogen storage and hydrogen catalytic oxidation technology, characterized in that, The dehydrogenation reactor and the catalytic oxidation reactor are connected with a liquid inlet pump, a condenser and a liquid outlet controller. The condenser is connected with a gas-liquid separator, which is connected with the catalytic oxidation reactor and the liquid outlet controller. The catalytic oxidation reactor is connected with a blower and a first heat exchanger.

2. The heat supply system based on organic liquid hydrogen storage and hydrogen catalytic oxidation technology according to claim 1, characterized in that, The first heat exchanger exchanges heat with a user terminal through a heat exchange medium a.

3. The heat supply system based on organic liquid hydrogen storage and hydrogen catalytic oxidation technology according to claim 1, characterized in that, The liquid inlet pump and the dehydrogenation reactor are further connected with a second heat exchanger, and the liquid outlet controller is also connected with the second heat exchanger.

4. The heat supply system based on organic liquid hydrogen storage and hydrogen catalytic oxidation technology according to claim 1, characterized in that, The catalytic oxidation reactor and the dehydrogenation reactor exchange heat through a heat exchange medium b.

5. The heat supply system based on organic liquid hydrogen storage and hydrogen catalytic oxidation technology according to claim 1, characterized in that, The catalytic oxidation reactor and the dehydrogenation reactor are further provided with a start-up burner.

6. The heat supply system based on organic liquid hydrogen storage and hydrogen catalytic oxidation technology according to claim 4, characterized in that, A temperature sensor is arranged at the outlet of the catalytic oxidation reactor to monitor the temperature T1 of the heat exchange medium b.

Images