Hydrodehydrogenation system and control method thereof

Abstract

The application discloses a hydrogenation and dehydrogenation system and a control method thereof, wherein the hydrogenation and dehydrogenation system comprises a hydrogen / oil combination chamber, a hydrogen oil tank, a reaction chamber, a hydrogen purification chamber, a purification chamber, an impurity storage chamber and a hydrogen-using equipment; wherein the power P of the hydrogen-using equipment and the hydrogen oil liquid level height h in the reaction chamber have the following relationship: h=Pt / (ρS*Wt%*ηQ), wherein ρ is the hydrogen density, S is the cross-sectional area of the reaction chamber, Wt% is the mass ratio of hydrogen to hydrogen oil in the hydrogen oil mixture, η is the effective conversion efficiency of hydrogen, Q is the heat value of hydrogen, and t is the time for hydrogen flowing from the reaction chamber to the hydrogen-using equipment. The application purifies hydrogen oil and hydrogen generated by storage, improves hydrogenation and hydrogen utilization efficiency, adjusts the actual height of the hydrogen oil liquid level in the reaction chamber according to the mathematical relationship between the hydrogen-using equipment power and the hydrogen oil liquid level height in the reaction chamber, and realizes automatic adjustment of the hydrogen-using equipment power and the hydrogen oil amount in the reaction chamber of the hydrogenation and dehydrogenation system.

Description

Technical Field

[0001] This application relates to the field of hydrogen production and transportation, specifically a hydrogenation and dehydrogenation system and its control method. Background Technology

[0002] Hydrogen storage oil is a specific type of unsaturated organic liquid (organic liquid hydrogen storage carrier material). Under certain temperature and pressure conditions, it undergoes a hydrogenation reaction with hydrogen through the action of a catalyst to produce hydrogen oil. Under certain conditions, the hydrogen oil undergoes a dehydrogenation reaction to produce storage oil and hydrogen. The hydrogen is used in fuel cell systems or to supply hydrogen engines. The storage oil is recovered and reacts with hydrogen again to produce hydrogen oil, thus repeating the cycle. Currently, the storage oil generated after hydrogen oil dehydrogenation is pumped back to the ground refueling station. After simple processing, it undergoes a hydrogenation reaction to produce hydrogen oil. Then, the hydrogen oil is refueled onto the ground or into the tanks of long-tank trailers using hydrogen refueling guns and transported to the hydrogen-using site. After use, the resulting storage oil is towed back to the ground refueling station by trailer, and the cycle continues.

[0003] Due to the inconvenience and safety hazards of ground-based hydrogen oil storage and transportation, each step of hydrogen oil storage, hydrogen addition, dehydrogenation, and storage is cumbersome, resulting in low efficiency in hydrogen addition and use, and the inability to automatically adjust the power of hydrogen use equipment and the amount of hydrogen oil in the hydrogen oil supply.

[0004] Chinese invention patent application No. 201911060631.1 discloses a hydrogen-oil transportation system. In this system, hydrogen and oil from a hydrogen production unit and a recycled oil storage station flow to a hydrogen refueling unit. Gaseous hydrogen is stored in an organic liquid through a catalytic hydrogenation reaction to form hydrogen-oil. The hydrogen-oil flows from the hydrogen refueling unit to a hydrogen-oil storage station for storage, and then to a hydrogen-oil refueling station. The refueling station uses a catalytic dehydrogenation reaction to remove hydrogen from the organic liquid, using it as gaseous hydrogen. The dehydrogenated organic liquid flows as recycled oil to the recycled oil storage station, and then from the recycled oil storage station to the hydrogen refueling unit. This scheme, to a certain extent, connects hydrogen-oil production and hydrogen-oil recycling, achieving supply and demand balance and reducing energy loss in traditional vehicle-mounted transportation. However, it cannot automatically adjust the power of the hydrogen-using equipment and the amount of hydrogen-oil in the hydrogen-oil supply. Summary of the Invention

[0005] The present invention aims to provide a hydrodehydrogenation system and control method that automatically adjusts the power of the hydrogen-using equipment and the amount of hydrogen oil in the hydrogen oil supply.

[0006] To solve the above-mentioned technical problems, the solution adopted by the present invention is: a hydrodehydrogenation system, including a reaction chamber and a hydrogen-using device, wherein the reaction chamber is connected to the hydrogen-using device; the power P of the hydrogen-using device and the hydrogen-oil liquid level h in the reaction chamber are related as follows: h = Pt / (ρS*Wt%*ηQ), where ρ is the hydrogen density, S is the cross-sectional area of ​​the reaction chamber, Wt% is the mass ratio of hydrogen to hydrogen-oil in the hydrogen-oil mixture, η is the effective hydrogen conversion efficiency, Q is the calorific value of hydrogen, and t is the time for hydrogen to flow from the reaction chamber to the hydrogen-using device.

[0007] This invention establishes a system of "reaction chamber-hydrogen-using equipment". A mathematical model is established based on the power of the hydrogen-using equipment to determine the hydrogen flow rate and the hydrogen oil level in the reaction chamber. The actual height of the hydrogen oil level in the reaction chamber is then adjusted according to the model, thereby realizing the automatic adjustment of the power of the hydrogen-using equipment and the amount of hydrogen oil in the reaction chamber of the hydrodehydrogenation system.

[0008] Preferably, the hydrodehydrogenation system further includes a hydrogen / oil combination chamber, a hydrogen / oil tank, a reaction chamber, a purification chamber, and an impurity storage chamber; the hydrogen / oil combination chamber includes an oil storage chamber and a hydrogen / oil chamber, the oil storage chamber is provided with a first inlet and a second inlet, the hydrogen / oil chamber is connected to the hydrogen / oil tank, both the hydrogen / oil chamber and the hydrogen / oil tank are connected to the inlet of a pipeline, the outlet of the pipeline is connected to the reaction chamber, the reaction chamber is connected to the purification chamber and the oil storage chamber, and the purification chamber is connected to the impurity storage chamber.

[0009] This invention integrates the three stages of oil storage hydrogenation, hydrogen-oil dehydrogenation, and hydrogen-oil storage and transportation into a single control system, realizing the cycle of hydrogenation and dehydrogenation, and also adding oil storage purification operations, which greatly improves hydrogenation efficiency.

[0010] Furthermore, the hydrogenation and dehydrogenation system also includes a hydrogen purification chamber, one end of which is connected to the reaction chamber and the other end of which is connected to the hydrogen-using equipment. The hydrogen generated in the reaction chamber is purified by the hydrogen purification chamber and supplied to the hydrogen-using equipment to improve the hydrogen utilization efficiency.

[0011] A first valve is provided between the outlet of the pipeline and the reaction chamber to control the flow rate of hydrogen oil into the reaction chamber, thereby adjusting the hydrogen oil level in the reaction chamber.

[0012] As an inventive concept, this invention also provides a control method for a hydrodehydrogenation system, the specific implementation process of which includes: adjusting the valve opening on the hydrogen oil inlet pipe of the reaction chamber to make the hydrogen oil level height h in the reaction chamber and the actual hydrogen oil level height h1 in the reaction chamber have the following relationship: |h-h1|≤r, where 0 <r≤0.1。

[0013] This invention establishes a mathematical model of hydrogen flow rate and hydrogen oil level in the reaction chamber based on the power requirements of hydrogen-using equipment. Then, it adjusts the actual height of hydrogen oil level in the reaction chamber according to the model, thereby realizing automatic adjustment of the power of hydrogen-using equipment and the amount of hydrogen oil in the reaction chamber of the hydrodehydrogenation system.

[0014] Furthermore, the control method for the hydrodehydrogenation system also includes adjusting the power of the hydrogen-using equipment, specifically the adjustment process including:

[0015] The power reduction operation process of the hydrogen-using equipment includes: when the hydrogen oil level in the hydrogen oil chamber is h... max At this time, the power of the hydrogen-using equipment is P. max When the hydrogen oil level in the hydrogen oil chamber drops to h2, the power of the hydrogen-using equipment is reduced to P2; when the hydrogen oil level in the hydrogen oil chamber drops to h3, the power of the hydrogen-using equipment is reduced to P3; when the hydrogen oil level in the hydrogen oil chamber drops to h4, the hydrogen-using equipment stops working.

[0016] Among them, P max >P2>P3, h max >h2>h3>h4, P max The maximum power of the hydrogen-using equipment, h max This refers to the maximum liquid level of hydrogen oil in the hydrogen oil chamber.

[0017] In this invention, h2 is set to 80%-100%h max P2 = 80%P max h3 is 50%-80% h max P3 = 50% P max h4 is 50% h max the following.

[0018] Compared with existing technologies, the beneficial effects of this invention are as follows: This invention sets up a purification chamber and a hydrogen purification chamber to purify the generated oil and hydrogen, improving the efficiency of hydrogen addition and utilization; based on the power requirements of the hydrogen-using equipment, a mathematical model is established for the hydrogen flow rate and the hydrogen oil level in the reaction chamber. The opening of the first valve is adjusted according to the hydrogen oil level in the reaction chamber in the model, thereby adjusting the actual hydrogen oil level in the reaction chamber, achieving automatic adjustment of the power of the hydrogen-using equipment and the amount of hydrogen oil in the reaction chamber of the hydrogen addition and dehydrogenation system, ensuring a balanced supply; when the hydrogen-using equipment malfunctions, the first valve is closed based on the mathematical relationship between the power requirement P of the hydrogen-using equipment and the hydrogen oil level h in the reaction chamber, preventing ineffective circulation in the hydrogen addition and dehydrogenation system; when a malfunction occurs in some parts of the production process, causing a decrease in the hydrogen oil level in the hydrogen oil chamber, the power of the hydrogen-using equipment is adjusted to prevent sudden equipment shutdown and ensure the operation of the hydrogen-using equipment. Attached Figure Description

[0019] Figure 1This is a schematic diagram of the hydrogenation system according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the dehydrogenation system according to an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the control method of the hydrodehydrogenation system according to an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the control method of the hydrodehydrogenation system according to an embodiment of the present invention. Detailed Implementation

[0023] Figure 1 This is a schematic diagram of the hydrogenation system according to an embodiment of the present invention, including a hydrogen / oil combination chamber and a hydrogen / oil tank. The hydrogen / oil combination chamber includes an oil storage chamber and a hydrogen / oil chamber, which are separated by a solid membrane. The hydrogen / oil chamber and the hydrogen / oil tank are connected by a pipeline. Both the hydrogen / oil chamber and the hydrogen / oil tank are connected to the inlet of the pipeline, and the outlet of the pipeline is connected to the reaction chamber. A working valve and a first valve are sequentially installed on the pipeline between the outlet of the pipeline and the reaction chamber. The first valve is a three-way valve. The oil storage chamber has a first inlet and a second inlet. The first inlet is an oil storage inlet, and the second inlet is a hydrogen inlet. An oil replenishment valve is installed on the oil storage inlet, and a hydrogen addition valve is installed on the hydrogen inlet. An oil storage valve 1 and a return oil pump are sequentially installed on the pipeline between the oil storage chamber and the purification chamber. An oil storage valve 2, an oil storage pump, and an oil storage valve 3 are sequentially installed on the pipeline between the hydrogen / oil chamber and the oil storage tank. A liquid level monitoring device 1 is installed in the hydrogen / oil chamber, and a liquid level monitoring device 2 is installed in the hydrogen / oil tank.

[0024] Upon initial use, the stored oil passes through the replenishment valve, and the hydrogen passes through the hydrogenation valve. Both enter the hydrogen / oil combination chamber together. The generated hydrogen-oil is then transported to the hydrogen oil tank via the storage valve 2 and the storage pump. The hydrogen oil level in the tank is monitored in real time by the level monitoring device 2. When the hydrogen oil level in the tank reaches its maximum, the valve at the bottom of the hydrogen oil chamber opens to store the excess hydrogen oil. After starting the hydrogen-using equipment, the valves at the bottom of the hydrogen oil tank and the bottom of the hydrogen oil chamber are opened, along with the working valve and the three-way valve. The hydrogen oil then enters the delivery pipeline, ready to generate hydrogen for supplying the hydrogen-using equipment in subsequent stages.

[0025] Figure 2 The diagram shows the structure of the dehydrogenation system according to an embodiment of the present invention, including a reaction chamber, a purification chamber, a hydrogen purification chamber, and an impurity storage chamber. The reaction chamber and the purification chamber are connected by a pipeline, the reaction chamber and the hydrogen purification chamber are connected by a pipeline, and the purification chamber and the impurity storage chamber are connected by a pipeline. An oil drain valve is provided on the pipeline between the reaction chamber and the purification chamber. A liquid level monitoring device 3 is provided in the reaction chamber. A hydrogen valve is provided on the pipeline between the reaction chamber and the hydrogen purification chamber.

[0026] After the hydrogenated oil transported过来 undergoes gas-liquid separation in the reaction chamber, the generated hydrogen passes through the hydrogen valve and then is purified in the purification chamber and supplied to the hydrogen-consuming equipment. The stored oil after gas-liquid separation is transported to the purification chamber through the oil discharge valve for purification. The filtered impurities are stored in the impurity storage chamber, and the purified stored oil is transported to the oil storage chamber for recycling.

[0027] Figure 3 It is a schematic diagram of the control method of the hydrogenation and dehydrogenation system according to an embodiment of the present invention. Among them, the hydrogenation and dehydrogenation system of the present invention includes a hydrogen / oil combination chamber, a hydrogen oil tank, a reaction chamber, a purification chamber, an impurity storage chamber, and a hydrogen purification chamber; the hydrogen / oil combination chamber includes an oil storage chamber and a hydrogenated oil chamber. The hydrogenated oil chamber is connected to the hydrogen oil tank through a pipeline. Both the hydrogenated oil chamber and the hydrogen oil tank are connected to the input port of the pipeline. A working valve and a three-way valve are sequentially arranged on the pipeline between the output port of the pipeline and the reaction chamber. The reaction chamber, the purification chamber, and the oil storage chamber are connected through pipelines. The purification chamber is connected to the impurity storage chamber through a pipeline. The reaction chamber is connected to the hydrogen purification chamber and the hydrogen-consuming equipment through pipelines. Among them, a hydrogen valve is arranged on the pipeline between the reaction chamber and the hydrogen purification chamber.

[0028] Correspondingly, an embodiment of the present invention designs a control method for a hydrogenation and dehydrogenation system, and its working principle diagram is as Figure 3 shown, Figure 3 All valves in it can be adjusted and controlled, all liquid level monitoring devices can online monitor the height of the hydrogenated oil liquid level and feedback data, and the hydrogenation, hydrogen transportation, and hydrogen consumption links can be联动 controlled.

[0029] (1) After one hydrogenation hydrogen transportation and dehydrogenation hydrogen transportation are completed, the purified stored oil passes through the oil return pump, the oil storage valve 1 is opened, and it enters the oil storage chamber. Since there will be a small amount of stored oil loss in this process, at this time, the oil supply valve and the hydrogenation valve are opened, the stored oil and hydrogen are input, and the two enter the hydrogen / oil combination chamber to generate hydrogenated oil. According to the hydrogenated oil liquid level data of the liquid level monitoring device 1 and the liquid level monitoring device 2, when the hydrogenated oil liquid level heights in both the hydrogenated oil chamber and the hydrogen oil tank reach the maximum, the working valve and the three-way valve are opened, and the hydrogenated oil enters the reaction chamber for gas-liquid separation, generating stored oil and hydrogen, completing the second cycle of hydrogenated oil to stored oil and stored oil to hydrogenated oil, and so on.

[0030] (2) After starting the hydrogen-consuming equipment, according to the power demand of the hydrogen-consuming equipment, the adjustable flowmeter of the hydrogen valve is adjusted in real time, a mathematical model h = Pt / (ρS*Wt%*ηQ) of the hydrogen consumption flow and the hydrogenated oil liquid level in the reaction chamber is established, the height h of the hydrogenated oil liquid level in the reaction chamber is calculated, the actual height h1 of the hydrogenated oil liquid level in the reaction chamber is monitored, and the opening degree of the valve on the hydrogenated oil input side pipeline of the reaction chamber is adjusted, that is, the opening degree of the three-way valve (the first valve) is adjusted, so that the hydrogenated oil liquid level height h in the reaction chamber and the actual height h1 of the hydrogenated oil liquid level in the reaction chamber satisfy |h - h1| ≤ r, where 0 < r ≤ 0.1, to ensure supply balance.

[0031] It should be noted that in this embodiment of the invention, P is the power required by the hydrogen-using equipment, η is the effective hydrogen conversion efficiency, Q is the calorific value of hydrogen, f (unit g / s) is the hydrogen flow rate, and f = P / (ηQ); h is the hydrogen-oil liquid level height in the reaction chamber, S is the cross-sectional area of ​​the reaction chamber, Wt% is the mass ratio of hydrogen to hydrogen-oil in the hydrogen-oil mixture (wherein, the hydrogen-oil mixture is a mixture of hydrogen and hydrogen-oil, without other constituent substances), ρ is the hydrogen density, and at this time, the amount of hydrogen in the reaction chamber m = ρhS * Wt%; t is the time for hydrogen to flow from the reaction chamber into the hydrogen-using equipment, and the relationship between the hydrogen flow rate f and the hydrogen amount m is f = m / t; therefore, the mathematical model for the online monitoring of the hydrogen flow meter and the hydrogen-oil liquid level height in the reaction chamber is P / (ηQ) = ρhS * Wt% / t, and the hydrogen-oil liquid level height in the reaction chamber is h = Pt / (ρS * Wt% * ηQ).

[0032] (3) When the hydrogen-using equipment malfunctions, the hydrogen valve will automatically close. Based on the mathematical relationship between the power demand P of the hydrogen-using equipment and the hydrogen oil level h in the reaction chamber, the three-way valve will be closed to prevent the hydrogenation and dehydrogenation system from undergoing ineffective circulation.

[0033] (4) When the oil replenishment valve and hydrogenation valve fail or other links fail, the oil storage will decrease, which will cause the monitoring liquid level data of the hydrogen oil room liquid level monitoring device 1 to drop and become unstable. At this time, the liquid level monitoring device 1 will directly transmit the monitoring data to the hydrogen valve, adjust the opening of the hydrogen valve according to the monitoring data, and then adjust the hydrogen flow rate. The hydrogen equipment controller will adjust the power of the hydrogen equipment according to the change of hydrogen flow rate per unit time, and the hydrogen equipment will operate continuously with reduced power in stages to avoid the hydrogen equipment from suddenly stopping and ensure the operation of the hydrogen equipment.

[0034] It should be noted that the specific implementation process of reducing the power of the hydrogen equipment in this embodiment of the invention includes: when the monitored liquid level height of the liquid level monitoring device 1 is the maximum liquid level height h... max At this time, the power of the hydrogen-using equipment is at its maximum power P. max When the liquid level monitored by the liquid level monitoring device 1 decreases to 80%-100%h max At that time, the power of hydrogen-using equipment was reduced to 80% P. max When the liquid level monitored by the liquid level monitoring device 1 drops to 50%-80%h max At that time, the power of hydrogen-using equipment was reduced to 50% P. max When the liquid level monitored by the liquid level monitoring device 1 decreases to 50%h max When the following conditions are met, the hydrogen valve closes and the hydrogen-using equipment stops operating.

[0035] Figure 4This is a schematic diagram of the control method of the hydrodehydrogenation system according to an embodiment of the present invention. After the hydrogen-using equipment is started, the liquid level monitoring device 3 monitors the hydrogen oil level in the reaction chamber in real time. When the monitoring data is greater than 'a', the reaction chamber starts to generate hydrogen. When the monitoring data is less than or equal to 'a', the valves at the bottom of the hydrogen oil tank and the bottom of the hydrogen oil chamber, as well as the working valve and the three-way valve, are opened sequentially to transport hydrogen oil to the reaction chamber until the monitoring data of the liquid level monitoring device 3 is greater than 'b'. At this time, the working valve is closed. At the same time, the liquid level monitoring device 2 monitors the hydrogen oil level in the hydrogen oil tank in real time. When the monitoring data is greater than 'c', the oil storage valve 2 and the oil storage valve 3 are closed. When the monitoring data is less than or equal to 'c', the oil storage valve 2 and the oil storage valve 3 are opened to connect the hydrogen / oil mixture. The hydrogen oil generated in the hydrogen / oil combination chamber is transported to the hydrogen oil tank via oil storage valve 2, oil storage pump, and oil storage valve 3 until the monitoring data of the liquid level monitoring 2 in the hydrogen oil tank is greater than d. At this time, oil storage valve 2 and oil storage valve 3 are closed. At the same time, the liquid level monitoring device 1 monitors the hydrogen oil level in the hydrogen oil chamber in real time. When the monitoring data is less than or equal to e, the oil storage valve 1 and the hydrogen addition valve are opened, and the stored oil and hydrogen enter the hydrogen / oil combination chamber to generate hydrogen oil to replenish the hydrogen oil chamber. It should be noted that since there will be a small amount of stored oil loss during the hydrogen addition and dehydrogenation cycle, this embodiment of the invention will also monitor the stored oil flow rate in the pipeline of oil storage valve 1 per unit time. When the monitoring data is less than f, the refueling valve is opened to input stored oil into the stored oil chamber at a flow rate of fg per unit time.

[0036] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not limiting. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the scope of protection of the present invention.

Claims

1. A hydrodehydrogenation system, comprising a reaction chamber and hydrogen-using equipment; characterized in that: The power P of the hydrogen-using device and the hydrogen-oil liquid level h in the reaction chamber are related as follows: h = Pt / (ρS * Wt% * ηQ), where ρ is the hydrogen density, S is the cross-sectional area of ​​the reaction chamber, Wt% is the mass ratio of hydrogen to hydrogen-oil in the hydrogen-oil mixture, η is the effective hydrogen conversion efficiency, Q is the calorific value of hydrogen, and t is the time it takes for hydrogen to flow from the reaction chamber to the hydrogen-using device. The hydrodehydrogenation system further includes a hydrogen / oil combination chamber, a hydrogen oil tank, a purification chamber, and an impurity storage chamber. The hydrogen / oil combination chamber includes an oil storage chamber and a hydrogen oil chamber. The oil storage chamber has a first inlet and a second inlet. The hydrogen oil chamber is connected to the hydrogen oil tank. Both the hydrogen oil chamber and the hydrogen oil tank are connected to the inlet of a pipeline. The outlet of the pipeline is connected to the reaction chamber. The reaction chamber is connected to the purification chamber and the oil storage chamber. The purification chamber is connected to the impurity storage chamber. The hydrogen purification chamber is directly connected to the hydrogen-using equipment. A first valve is provided between the outlet of the pipeline and the reaction chamber. The opening degree of the first valve is adjusted according to the hydrogen oil level height in the reaction chamber. The hydrogen oil level height h in the reaction chamber is determined based on the relationship between the power P of the hydrogen-using equipment and the hydrogen oil level height h, and the power requirements of the hydrogen-using equipment. The first valve is a three-way valve. When a hydrogen-using device malfunctions, the hydrogen valve automatically closes. Based on the mathematical relationship between the power demand P of the hydrogen-using device and the hydrogen oil level h in the reaction chamber, the three-way valve is closed. When the replenishment valve and hydrogenation valve malfunction, resulting in a reduction in oil storage, the level monitoring device transmits the monitoring data to the hydrogen valve. Based on the monitoring data, the opening of the hydrogen valve is adjusted, thereby regulating the hydrogen flow rate. The hydrogen-using device controller adjusts the power of the hydrogen-using device according to the change in hydrogen flow rate per unit time.

2. The hydrodehydrogenation system according to claim 1, characterized in that, It also includes a hydrogen purification chamber, which is connected to the reaction chamber and the hydrogen-using equipment.

3. A control method for the hydrodehydrogenation system according to any one of claims 1 to 2, characterized in that, The method includes: After the hydrogen-using equipment is started, the hydrogen-oil level in the reaction chamber is obtained by using the established mathematical model of hydrogen flow rate and hydrogen oil level in the reaction chamber, based on the power requirements of the hydrogen-using equipment. The method further includes: when the hydrogen-using equipment malfunctions, closing the first valve according to the mathematical model; and adjusting the power of the hydrogen-using equipment when a malfunction occurs in the hydrogen oil production process, causing a decrease in the hydrogen oil level in the hydrogen oil chamber.

4. The control method for the hydrodehydrogenation system according to claim 3, characterized in that, The specific power adjustment process of the hydrogen-using equipment includes: When the hydrogen oil level in the hydrogen oil chamber is h max At that time, the power of the hydrogen-using equipment was P. max When the hydrogen oil level in the hydrogen oil chamber drops to h2, the power of the hydrogen-using equipment is reduced to P2; when the hydrogen oil level in the hydrogen oil chamber drops to h3, the power of the hydrogen-using equipment is reduced to P3; when the hydrogen oil level in the hydrogen oil chamber drops to h4, the hydrogen-using equipment stops working. Among them, P max >P2>P3, h max >h2>h3>h4, P max The maximum power of the hydrogen-using equipment, h max This refers to the maximum liquid level of hydrogen oil in the hydrogen oil chamber.

5. The control method for the hydrodehydrogenation system according to claim 4, characterized in that, h2 is 80%-100%h max P2 = 80%P max h3 is 50%-80%h max P3 = 50% max h4 is 50% h max the following.

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