Stable supply system for hydrogen production by clean energy and control method thereof

Abstract

The invention relates to the technical field of hydrogen production, in particular to a stable supply system for hydrogen production through clean energy and a control method of the stable supply system. The gas mixing chamber is used for mixing methanol steam and desalted water steam to form mixed gas; the heat preservation chamber is arranged outside the gas mixing chamber and is used for preserving heat of the gas mixing chamber through hydrogen mixed gas output by the reaction chamber; the reaction hydrogen production unit is connected with the raw material mixing unit and is used for providing chemical reaction conditions of the mixed gas to generate hydrogen mixed gas of hydrogen and carbon dioxide; the gas separation unit is used for separating the hydrogen mixed gas to output pure hydrogen; the detection unit is used for detecting the internal air pressure of the gas mixing chamber, the air pressure of the gas inlet of the reaction chamber, the air pressure of the gas outlet of the reaction chamber and the vibration frequency of the gas mixing chamber; the hydrogen production stability is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydrogen production, in particular to a stable supply system for clean energy hydrogen production and a control method thereof. BACKGROUND

[0002] Traditional hydrogen production technologies such as fossil fuel hydrogen production produce a large amount of carbon dioxide, and water point hydrogen production has high energy consumption and is also more dependent on the stability of the power grid. If connected to new energy power supply, the stability of the power supply is insufficient, so methanol as a clean energy for hydrogen production has special advantages, but the process of methanol hydrogen production is complex, and the generated mixed gas is easy to interfere with the normal reaction process.

[0003] Chinese Patent Publication No. CN117658069A discloses a methanol hydrogen production system and a methanol hydrogen production process. The methanol hydrogen production system includes a vaporization unit, a reforming hydrogen production unit, a mixed gas separation unit, and a carbon sequestration agent regeneration unit. The vaporization unit is connected to the tube side of the heat exchanger of the reforming hydrogen production unit to input the steam of the methanol solution into the tube side of the heat exchanger to react with the methanol reforming catalyst. The tube side discharge end of the heat exchanger is connected to the shell side, which is filled with calcium oxide. The mixed gas of the reforming product enters the shell side of the heat exchanger, and the mixed gas reacts exothermically with calcium oxide. The released heat can exchange with the tube side of the heat exchanger to provide heat for the continuous reforming reaction, effectively reducing the energy consumption required for the reforming reaction. The shell side discharge end of the heat exchanger is connected to the mixed gas separation unit. Hydrogen and impurity gas are separated by the mixed gas separation unit. The impurity gas can be input from the mixed gas separation unit to the carbon sequestration agent regeneration unit as fuel to realize the recycling of the carbon sequestration agent. It can be seen that the methanol hydrogen production system and the methanol hydrogen production process have the problem that the high-temperature mixed gas of hydrogen and carbon dioxide causes the circulation pipeline to vibrate, so that when the vibration frequency is high, the original methanol vapor and desalted water vapor in the gas mixing chamber will cause the micro-droplets in the mixed gas to gather, causing the mixed gas containing droplets to instantaneously vaporize in the high-temperature environment when entering the reaction chamber, resulting in an instantaneous increase in gas pressure, and thus the impact on the catalyst becomes larger. SUMMARY

[0004] Therefore, the present application provides a stable supply system for clean energy hydrogen production and a control method thereof to overcome the problem in the prior art that the high-temperature mixed gas of hydrogen and carbon dioxide causes the circulation pipeline to vibrate, so that when the vibration frequency is high, the original methanol vapor and desalted water vapor in the gas mixing chamber will cause the micro-droplets in the mixed gas to gather, causing the mixed gas containing droplets to instantaneously vaporize in the high-temperature environment when entering the reaction chamber, resulting in an instantaneous increase in gas pressure, and thus the impact on the catalyst becomes larger.

[0005] To achieve the above object, the present application provides a stable supply system for hydrogen production of clean energy, comprising: a raw material mixing unit, comprising a gas mixing chamber for mixing methanol vapor and desalted water vapor to form a mixed gas, and a heat preservation chamber provided outside the gas mixing chamber and outputting the hydrogen mixed gas through the reaction chamber to heat the gas mixing chamber; a reaction hydrogen production unit connected with the raw material mixing unit, for providing a chemical reaction condition of the mixed gas to generate a hydrogen mixed gas of hydrogen and carbon dioxide, comprising a reaction chamber, a catalytic reaction bed provided inside the reaction chamber to provide a catalyst reaction position, and a heating assembly for heating the mixed gas inside the reaction chamber; a gas separation unit connected with the raw material mixing unit, for separating the hydrogen mixed gas to output pure hydrogen; a detection unit connected with the raw material mixing unit and the reaction hydrogen production unit, respectively, for detecting the internal gas pressure of the gas mixing chamber, the gas pressure of the gas inlet of the reaction chamber, the gas pressure of the gas outlet of the reaction chamber, and the vibration frequency of the gas mixing chamber, respectively; a control unit connected with the raw material mixing unit, the reaction hydrogen production unit, the gas separation unit, and the detection unit, respectively, for determining the gas flow entering the heat preservation chamber according to the decrease of the internal gas pressure and the vibration frequency of the gas mixing chamber, determining the gas inlet speed of the reaction chamber according to the switching frequency of the liquid droplet aggregation state, and determining the triggering frequency of the breathing mode of the reaction chamber according to the pressure difference between the inlet and outlet of the reaction chamber after the reaction chamber is operated according to the gas inlet speed of the reaction chamber, wherein the breathing mode of the reaction chamber is to adjust the inlet temperature of the reaction chamber and the gas inlet speed of the reaction chamber within a preset time period.

[0006] Further, the detection unit comprises: a first gas pressure sensor provided on the inner wall of the gas mixing chamber for detecting the internal gas pressure of the gas mixing chamber; a second gas pressure sensor provided in the gas inlet pipeline of the reaction chamber for detecting the gas pressure of the gas inlet of the reaction chamber; a third gas pressure sensor provided in the gas outlet pipeline of the reaction chamber for detecting the gas pressure of the gas outlet of the reaction chamber; a vibration sensor connected with the gas mixing chamber for detecting the vibration frequency of the gas mixing chamber.

[0007] Further, the control unit is connected with the first air pressure sensor and the vibration sensor respectively, to determine that the liquid droplet aggregation state is not qualified when the internal air pressure reduction is greater than a preset air pressure reduction and the vibration frequency of the gas mixing chamber is greater than a preset vibration frequency, and to reduce the gas flow into the heat preservation chamber.

[0008] Further, the gas flow into the heat preservation chamber is negatively correlated with the internal air pressure reduction.

[0009] Further, the control unit determines that the impact risk of the mixed gas on the catalyst is not qualified when the switching frequency of the aggregation state is greater than a preset switching frequency, and reduces the gas inlet speed of the reaction chamber, wherein, The gas inlet speed of the reaction chamber is negatively correlated with the switching frequency of the aggregation state.

[0010] Further, the switching frequency of the aggregation state is the number of times of triggering that the liquid droplet aggregation state is not qualified within a monitoring period and the length of the monitoring period.

[0011] Further, the control unit determines that the corrosion degree of the catalytic reaction bed is not qualified when the inlet and outlet pressure difference of the reaction chamber is less than a preset pressure difference, and increases the triggering frequency of the breathing mode of the reaction chamber.

[0012] Further, the inlet and outlet pressure difference of the reaction chamber is the difference between the air pressure of the gas inlet of the reaction chamber and the air pressure of the gas outlet of the reaction chamber.

[0013] Further, the triggering frequency of the coefficient mode of the reaction chamber is negatively correlated with the inlet and outlet pressure difference of the reaction chamber.

[0014] The application also provides a clean energy hydrogen production stable supply system control method, comprising: Respectively acquiring the internal air pressure of the gas mixing chamber and the vibration frequency of the gas mixing chamber; Determining the liquid droplet aggregation state according to the internal air pressure reduction and the vibration frequency to determine the gas flow into the heat preservation chamber; Collecting the switching frequency of the liquid droplet aggregation state; Determining the gas inlet speed of the reaction chamber according to the switching frequency; Acquiring the air pressure of the gas inlet of the reaction chamber and the air pressure of the gas outlet of the reaction chamber after the reaction chamber is operated according to the gas inlet speed of the reaction chamber; Calculating the inlet and outlet pressure difference of the reaction chamber according to the air pressure of the gas inlet of the reaction chamber and the air pressure of the gas outlet of the reaction chamber; Determining the triggering frequency of the breathing mode of the reaction chamber according to the inlet and outlet pressure difference of the reaction chamber.

[0015] Compared with the prior art, the present application has the beneficial effects that, by determining the liquid droplet aggregation state of the mixed gas according to the decrease amount of the internal gas pressure and the vibration frequency of the gas mixing chamber, and reducing the gas flow rate into the heat preservation chamber when the liquid droplet aggregation state does not meet the requirements, the present application reduces the vibration of the circulating pipeline caused by the high-temperature mixed gas of hydrogen and carbon dioxide output from the reaction chamber when there is a small amount of liquid droplets in the gas mixing chamber, so that the vibration frequency is higher, which causes the small amount of liquid droplets in the mixed gas of methanol vapor and desalted water vapor in the gas mixing chamber to aggregate, so that the mixed gas entering the reaction chamber contains liquid droplets, the liquid droplets vaporize instantaneously in the high-temperature environment of the reaction chamber, causing an instantaneous increase in gas pressure, and the impact of the entering mixed gas on the catalyst becomes larger, so that by reducing the gas flow rate of the mixed gas of hydrogen and carbon dioxide into the heat preservation chamber, the aggregation degree of the liquid droplets is reduced, the impact on the catalyst is improved, and the stability and completeness of the hydrogen production reaction are improved.

[0016] Further, by reducing the gas inlet speed of the reaction chamber according to the switching frequency of the liquid droplet aggregation state, if the switching frequency between the two states of the liquid droplet aggregation state not meeting the requirements and meeting the requirements exceeds a certain range, the impact on the catalyst will become serious, because the more the switching frequency, the more different the movement ability and impact strength of the mixed gas input into the reaction chamber each time, which will weaken the structure of the catalyst and increase the risk of breaking, so that the amount of the catalyst converted into powder form increases, the reaction process of the methanol mixed gas is incomplete, and the amount of hydrogen production is affected, by reducing the gas inlet speed of the reaction chamber, the impact strength is reduced, the influence of the impact on the catalyst on the integrity of the catalyst is reduced, and the stability of hydrogen production is improved.

[0017] Further, the present application determines the triggering frequency of the breathing mode of the reaction chamber according to the pressure difference between the inlet and outlet of the reaction chamber after the reaction chamber is operated at the gas inlet speed, so as to reduce the corrosion of trace amounts of chlorine ions to the catalytic reaction bed, for example, the reaction of the catalyst carrier aluminum oxide with the chlorine ions to generate volatile aluminum chloride, so that the generated aluminum chloride migrates and re-deposits in the bed layer, thereby destroying the pore structure of the catalytic reaction bed and reducing the structural strength, and thus the contact integrity of the mixed gas with the catalyst is reduced, therefore, by increasing the inlet temperature of the reaction chamber and reducing the gas inlet speed of the reaction chamber, the chlorine ions and other toxic substances adsorbed on the catalyst can be carried out of the reaction chamber at a higher temperature and a lower flow rate, and the reaction completeness of the catalyst is improved by deep breathing adjustment of the catalyst. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The overall structure block diagram of the stable supply system for clean energy hydrogen production of the embodiment of the present application; Figure 2 The structure block diagram of the raw material mixing unit of the stable supply system for clean energy hydrogen production of the embodiment of the present application Figure 3 The overall structure schematic diagram of the stable supply system for clean energy hydrogen production of the embodiment of the present application; Figure 4 The overall flow chart of the control method of the stable supply system for clean energy hydrogen production of the embodiment of the present application; The description of reference signs: 1-hydrogen PSA pressure swing adsorption device, 2-circulation pipeline, 3-third gas pressure sensor, 4-vibration sensor, 5-inlet valve, 6-heat preservation chamber, 7-first conveying pipeline, 8-second conveying pipeline, 9-first gas pressure sensor, 10-gas mixing chamber, 11-outlet pipeline, 12-conducting oil heating furnace, 13-conveying pump, 14-first outlet valve, 15-heat exchange cavity, 16-second outlet valve, 17-water cooler, 18-inlet pipeline, 19-second gas pressure sensor. DETAILED DESCRIPTION

[0019] In order to make the objects and advantages of the present application clearer, the present application will be further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0020] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application and are not intended to limit the protection scope of the present application.

[0021] It should be noted that in the description of the present application, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the direction or positional relationship terms based on the direction or positional relationship shown in the drawings, which are only for the convenience of description and do not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0022] Moreover, it needs to be explained that, in the description of the present application, unless explicitly defined and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0023] Please refer to Figure 1 and Figure 2 The overall structure block diagram of the stable supply system for hydrogen production by clean energy, the structure block diagram of the raw material mixing unit, the overall structure schematic diagram and the overall flow chart of the control method of the stable supply system for hydrogen production by clean energy are shown in Figs. 1 to 4 respectively; the stable supply system for hydrogen production by clean energy in the embodiment of the present application comprises: a raw material mixing unit, which comprises a gas mixing chamber 10 for mixing methanol vapor and desalted water vapor to form mixed gas, and a heat preservation chamber 6 arranged outside the gas mixing chamber 10 and outputting hydrogen mixed gas from the reaction chamber to heat the gas mixing chamber 10; a reaction hydrogen production unit connected with the raw material mixing unit, which provides chemical reaction conditions for the mixed gas to generate hydrogen mixed gas of hydrogen and carbon dioxide, and comprises a reaction chamber 20, a catalytic reaction bed arranged inside the reaction chamber to provide a catalyst reaction position, and a heating assembly for heating the mixed gas inside the reaction chamber; a gas separation unit connected with the raw material mixing unit, which separates the hydrogen mixed gas to output pure hydrogen; a detection unit connected with the raw material mixing unit and the reaction hydrogen production unit respectively, which detects the internal gas pressure of the gas mixing chamber 10, the gas pressure of the gas inlet of the reaction chamber, the gas pressure of the gas outlet of the reaction chamber and the vibration frequency of the gas mixing chamber 10 respectively; a control unit connected with the raw material mixing unit, the reaction hydrogen production unit, the gas separation unit and the detection unit respectively, which determines the gas flow entering the heat preservation chamber 6 according to the decrease of the internal gas pressure and the vibration frequency of the gas mixing chamber 10, determines the gas inlet speed of the reaction chamber according to the switching frequency of the liquid droplet aggregation state, and determines the triggering frequency of the breathing mode of the reaction chamber according to the pressure difference between the inlet and outlet of the reaction chamber after the reaction chamber is operated at the gas inlet speed of the reaction chamber, wherein the breathing mode of the reaction chamber is to adjust the inlet temperature of the reaction chamber and the gas inlet speed of the reaction chamber for a preset time period.

[0024] Specifically, the adjustment of the inlet temperature of the reaction chamber is achieved by adjusting the heating temperature of the device for heating methanol and the device for heating desalted water; the adjustment of the gas inlet speed of the reaction chamber is achieved by changing the opening size of the gas inlet valve.

[0025] Specifically, in the breathing mode of the reaction chamber, the adjustment of the inlet temperature of the reaction chamber is an increase adjustment, the adjustment of the gas inlet speed of the reaction chamber is a decrease adjustment, the preferred embodiment of the duration of the preset time period is 2 hours, the optional range of the increase amplitude of the inlet temperature of the reaction chamber is [6℃, 12℃], and the increase amplitude of the inlet temperature of the reaction chamber is 9℃; the optional range of the decrease amplitude of the gas inlet speed of the reaction chamber is [20%, 40%], and the preferred embodiment of the decrease amplitude of the gas inlet speed of the reaction chamber is 30%.

[0026] Those skilled in the art can understand that those skilled in the art can adaptively adjust the adjustment amplitudes of the inlet temperature of the reaction chamber and the gas inlet speed of the reaction chamber according to actual conditions, which will not be described here.

[0027] Specifically, when the breathing mode of the reaction chamber is triggered, the decrease amplitude of the gas inlet speed of the reaction chamber is calculated in percentage, which means that the designed gas inlet speed of the reaction chamber is decreased by a corresponding proportion.

[0028] Specifically, the gas separation unit includes a water cooler 17 and a hydrogen PSA pressure swing adsorption device 1.

[0029] Specifically, the heating assembly includes: a heat exchange cavity 15 arranged inside the reaction chamber to transfer heat to the inside of the reaction chamber; a heat conducting oil heating furnace 12 connected with the heat exchange cavity 15 through a delivery pump 13 to deliver heated heat conducting oil into the heat exchange cavity 15.

[0030] Specifically, the raw material mixing unit further includes: a first delivery pipeline 7 connected with the gas mixing chamber 10 to deliver methanol vapor to the gas mixing chamber 10; a second delivery pipeline 8 connected with the gas mixing chamber 10 through the first delivery pipeline 7 to deliver desalted water vapor to the gas mixing chamber 10.

[0031] Specifically, a gas inlet valve 5 for controlling the feed air speed is further arranged between the gas mixing chamber 10 and the reaction chamber.

[0032] Specifically, the reaction hydrogen production unit further includes: an outlet pipeline 11 connected with the reaction chamber to deliver part of the hydrogen mixed gas output by the reaction chamber to the heat preservation chamber 6; A first gas outlet valve 14 is arranged on the gas outlet pipe 11 to control the gas flow into the holding chamber 6. A second gas outlet valve 16 is arranged between the reaction chamber and the water cooler 17 to control the hydrogen mixed gas flow into the water cooler 17.

[0033] Specifically, a circulation pipe 2 is further arranged between the holding chamber 6 and the water cooler 17 to deliver the hydrogen mixed gas after passing through the holding chamber 6 into the water cooler 17.

[0034] Specifically, the detection unit comprises: A first gas pressure sensor 9 is arranged on the inner wall of the gas mixing chamber 10 to detect the internal gas pressure of the gas mixing chamber 10. A second gas pressure sensor 19 is arranged in the gas inlet pipe 18 of the reaction chamber to detect the gas pressure of the gas inlet of the reaction chamber. A third gas pressure sensor 3 is arranged in the gas outlet pipe 11 of the reaction chamber to detect the gas pressure of the gas outlet of the reaction chamber. A vibration sensor 4 is connected to the gas mixing chamber 10 to detect the vibration frequency of the gas mixing chamber 10.

[0035] Specifically, the control unit is connected to the first gas pressure sensor 9 and the vibration sensor 4 respectively, to determine that the liquid droplet aggregation state of the mixed gas does not meet the requirements when the internal gas pressure reduction is greater than a preset gas pressure reduction, and the vibration frequency of the gas mixing chamber 10 is greater than a preset vibration frequency, and to reduce the gas flow into the holding chamber 6.

[0036] Specifically, the gas flow into the holding chamber 6 is negatively correlated with the internal gas pressure reduction.

[0037] Optionally, under the condition that the internal gas pressure of the gas mixing chamber 10 is 0.1 MPa, the optional range of the preset gas pressure reduction is [50 Pa, 100 Pa], and the preferred embodiment of the preset gas pressure reduction is 80 Pa.

[0038] Optionally, under the condition that the rotation speed of the methanol feeding pump is 800 r / min, the optional range of the preset vibration frequency is [80 Hz, 100 Hz], and the preferred embodiment of the preset vibration frequency is 90 Hz.

[0039] In the implementation, when the decrease of the internal air pressure exceeds the preset air pressure decrease value by 20 Pa or less, the gas flow into the holding chamber 6 is reduced to 95% of the current gas flow into the holding chamber 6; when the decrease of the internal air pressure exceeds the preset air pressure decrease value by more than 20 Pa, the current gas flow into the holding chamber 6 is reduced by 1 m3 / h for each 1 Pa of excess, in a possible embodiment, the current gas flow into the holding chamber 6 is 150 m3 / h, and the decrease of the internal air pressure is 110 Pa, then the reduced gas flow into the holding chamber 6 is 150 m3 / h x 95% - (110 Pa - 80 Pa - 20 Pa) / 1 Pa x 1 m3 / h = 132.5 m3 / h.

[0040] In the implementation, the present application determines the liquid droplet aggregation state of the mixed gas according to the decrease of the internal air pressure and the vibration frequency of the gas mixing chamber 10, and reduces the gas flow into the holding chamber 6 when the liquid droplet aggregation state does not meet the requirements, thereby reducing the vibration of the circulating pipeline caused by the high-temperature mixed gas of hydrogen and carbon dioxide output by the reaction chamber when there are trace or small amounts of liquid droplets in the gas mixing chamber 10, so that the vibration frequency is higher when the trace liquid droplets in the mixed gas of methanol vapor and desalted water vapor in the gas mixing chamber 10 are aggregated, so that the mixed gas entering the reaction chamber contains liquid droplets, the liquid droplets vaporize instantaneously in the high-temperature environment of the reaction chamber, causing an instantaneous increase in air pressure, and the impact of the entering mixed gas on the catalyst is increased, therefore, by reducing the gas flow of the mixed gas of hydrogen and carbon dioxide into the holding chamber 6, the aggregation degree of the liquid droplets is reduced, thereby improving the impact on the catalyst, and the stability and completeness of the hydrogen production reaction are improved.

[0041] Specifically, the control unit determines that the risk of the mixed gas impacting the catalyst does not meet the requirements according to the switching frequency of the aggregation state being greater than a preset switching frequency, and reduces the gas inlet speed of the reaction chamber, wherein, The gas inlet speed of the reaction chamber and the switching frequency of the aggregation state are in a negative correlation.

[0042] Optionally, the optional range of the preset switching frequency is [2 times / hour, 4 times / hour], and the preferred embodiment of the preset switching frequency is 3 times / hour.

[0043] In implementation, when the switching frequency of the aggregation state exceeds the preset switching frequency by 2 times / hour or less, the gas inlet speed of the reaction chamber is reduced to 0.9 times of the current gas inlet speed of the reaction chamber; when the switching frequency of the aggregation state exceeds the preset switching frequency by more than 2 times / hour, the current gas inlet speed of the reaction chamber is reduced by 0.1 m3 / h for each excess of 1 time / hour. In a possible embodiment, the switching frequency of the aggregation state is 6 times / hour, and the current gas inlet speed of the reaction chamber is 8.2 m3 / h, so the reduced gas inlet speed of the reaction chamber is 8.2 m3 / h x 0.9 - (6 times / hour - 3 times / hour) / 1 time / hour x 0.1 m3 / h = 7.08 m3 / h.

[0044] In implementation, the present application reduces the gas inlet speed of the reaction chamber according to the switching frequency of the aggregation state. When the switching frequency of the aggregation state exceeds a certain range between the state of not meeting the requirements and the state of meeting the requirements, the impact on the catalyst becomes serious. The reason is that when the switching frequency is greater, the movement ability and impact intensity of the mixed gas input into the reaction chamber are different each time. The different impact intensities weaken the structure of the catalyst, which increases the risk of breaking of the catalyst and increases the amount of the catalyst converted into powder form, thereby affecting the reaction process of the methanol mixed gas and the amount of hydrogen produced. By reducing the gas inlet speed of the reaction chamber, the impact intensity is reduced, thereby reducing the influence of the impact on the catalyst on the integrity of the catalyst and improving the stability of hydrogen production.

[0045] Specifically, the switching frequency of the aggregation state is the number of times of triggering the state of the liquid droplet aggregation not meeting the requirements within the monitoring period and the length of the monitoring period.

[0046] Specifically, the control unit determines that the corrosion degree of the catalytic reaction bed does not meet the requirements according to the pressure difference between the inlet and outlet of the reaction chamber being less than the preset pressure difference, and increases the triggering frequency of the breathing mode of the reaction chamber.

[0047] Specifically, the pressure difference between the inlet and outlet of the reaction chamber is the difference between the gas pressure of the gas inlet of the reaction chamber and the gas pressure of the gas outlet of the reaction chamber.

[0048] Specifically, the triggering frequency of the breathing mode of the reaction chamber is negatively correlated with the pressure difference between the inlet and outlet of the reaction chamber.

[0049] Optionally, the optional range of the preset pressure difference is [0.05 MPa, 0.07 MPa], and the preferred embodiment of the preset pressure difference is 0.06 MPa.

[0050] In the implementation, when the difference between the preset pressure difference and the inlet-outlet pressure difference of the reaction chamber is within 0.01 MPa, the triggering frequency of the breathing mode of the reaction chamber is increased to 1.5 times of the current triggering frequency of the breathing mode of the reaction chamber, and when the difference between the preset pressure difference and the inlet-outlet pressure difference of the reaction chamber exceeds 0.01 MPa, the triggering frequency of the breathing mode of the reaction chamber is increased by 1 time per month for each 0.001 MPa exceeding 0.01 MPa. In an embodiment, the inlet-outlet pressure difference of the reaction chamber is 0.045 MPa, the current triggering frequency of the breathing mode of the reaction chamber is 8 times per hour, and then the increased triggering frequency of the breathing mode of the reaction chamber is 4 times per month*1.5+(0.06 MPa-0.045 MPa-0.01 MPa) / 0.001 MPa*1 time per month=11 times per month.

[0051] In the implementation, the triggering frequency of the breathing mode of the reaction chamber is determined according to the inlet-outlet pressure difference of the reaction chamber after the reaction chamber is operated at the gas inlet speed, so as to reduce the corrosion of trace chlorine ions to the catalytic reaction bed, for example, the reaction of the chlorine ions with the catalyst carrier aluminum oxide to generate volatile aluminum chloride, so that the generated aluminum chloride migrates and re-deposits in the bed layer, thereby destroying the pore structure of the catalytic reaction bed and reducing the structural strength, and thus the contact integrity of the mixed gas and the catalyst is reduced. Therefore, by increasing the inlet temperature of the reaction chamber and reducing the gas inlet speed of the reaction chamber, the chlorine ions and other toxic substances adsorbed on the catalyst can be taken out of the reaction chamber at a higher temperature and a lower flow rate, and the reaction completeness of the catalyst is improved through deep breathing adjustment of the catalyst.

[0052] The embodiment of the present application also provides a control method of a stable supply system for hydrogen production of clean energy, comprising: respectively acquiring the internal gas pressure of the gas mixing chamber 10 and the vibration frequency of the gas mixing chamber 10; determining the liquid drop aggregation state according to the decrease amount of the internal gas pressure and the vibration frequency, so as to determine the gas flow entering the heat preservation chamber 6; collecting the switching frequency of the liquid drop aggregation state; determining the gas inlet speed of the reaction chamber according to the switching frequency; acquiring the gas pressure of the gas inlet of the reaction chamber and the gas pressure of the gas outlet of the reaction chamber after the reaction chamber is operated at the gas inlet speed; calculating the inlet-outlet pressure difference of the reaction chamber according to the gas pressure of the gas inlet of the reaction chamber and the gas pressure of the gas outlet of the reaction chamber; determining the triggering frequency of the breathing mode of the reaction chamber according to the inlet-outlet pressure difference of the reaction chamber.

[0053] The technical scheme of the present application has been described in combination with the preferred embodiments shown in the drawings, but it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without departing from the principles of the present application, and the technical schemes after the changes or replacements will all fall within the protection scope of the present application.

Claims

1. A stable supply system of clean energy hydrogen production, characterized by, The application relates to a hydrogen production device, comprising: a raw material mixing unit, comprising a gas mixing chamber for mixing methanol vapor and desalted water vapor to form a mixed gas, and a heat preservation chamber arranged outside the gas mixing chamber and outputting a hydrogen mixed gas through a reaction chamber to heat preserve the gas mixing chamber; a reaction hydrogen production unit connected with the raw material mixing unit, for providing a chemical reaction condition of the mixed gas to produce a hydrogen mixed gas of hydrogen and carbon dioxide, comprising a reaction chamber, a catalytic reaction bed arranged inside the reaction chamber to provide a catalytic reaction position, and a heating assembly for heating the mixed gas inside the reaction chamber; a gas separation unit connected with the raw material mixing unit, for separating the hydrogen mixed gas to output pure hydrogen; a detection unit connected with the raw material mixing unit and the reaction hydrogen production unit respectively, for detecting an internal gas pressure of the gas mixing chamber, a gas pressure of an air inlet of the reaction chamber, a gas pressure of an air outlet of the reaction chamber, and a vibration frequency of the gas mixing chamber respectively; a control unit connected with the raw material mixing unit, the reaction hydrogen production unit, the gas separation unit and the detection unit respectively, for determining a gas flow entering the heat preservation chamber according to a reduction amount of the internal gas pressure and the vibration frequency of the gas mixing chamber, determining an air inlet speed of the reaction chamber according to a switching frequency of a liquid drop aggregation state, and determining a triggering frequency of a breathing mode of the reaction chamber according to a pressure difference between the air inlet and the air outlet of the reaction chamber after the reaction chamber is operated at the air inlet speed, wherein the breathing mode of the reaction chamber is to simultaneously adjust the inlet temperature of the reaction chamber and the air inlet speed of the reaction chamber for a preset time period.

2. The stable supply system of clean energy hydrogen production according to claim 1, characterized in that, The detection unit comprises: a first gas pressure sensor arranged on an inner wall of the gas mixing chamber, for detecting the internal gas pressure of the gas mixing chamber; a second gas pressure sensor arranged in an air inlet pipeline of the reaction chamber, for detecting the gas pressure of the air inlet of the reaction chamber; a third gas pressure sensor arranged in an air outlet pipeline of the reaction chamber, for detecting the gas pressure of the air outlet of the reaction chamber; a vibration sensor connected with the gas mixing chamber, for detecting the vibration frequency of the gas mixing chamber.

3. The stable supply system of clean energy hydrogen production according to claim 2, characterized in that, The control unit is connected with the first gas pressure sensor and the vibration sensor respectively, for determining that the liquid drop aggregation state of the mixed gas does not meet the requirement when the reduction amount of the internal gas pressure is greater than a preset gas pressure reduction amount and the vibration frequency of the gas mixing chamber is greater than a preset vibration frequency, and reducing the gas flow entering the heat preservation chamber.

4. The stable supply system of clean energy hydrogen production according to claim 3, characterized in that, The gas flow entering the heat preservation chamber is in a negative correlation with the reduction amount of the internal gas pressure.

5. The stable supply system of clean energy hydrogen production according to claim 4, characterized in that, The control unit determines that the impact risk of the mixed gas on the catalyst does not meet the requirement when the switching frequency of the aggregation state is greater than a preset switching frequency, and reduces the air inlet speed of the reaction chamber, wherein the air inlet speed of the reaction chamber is in a negative correlation with the switching frequency of the aggregation state. The switching frequency of the aggregation state is a number of times of triggering that the liquid drop aggregation state does not meet the requirement in a monitoring period and a length of the monitoring period.

6. The stable supply system of clean energy hydrogen production according to claim 5, characterized in that, ​ 7. The stable supply system of clean energy hydrogen production according to claim 6, characterized in that, The control unit determines that the corrosion degree of the catalytic reaction bed does not meet the requirement according to the fact that the inlet-outlet pressure difference of the reaction chamber is less than a preset pressure difference, and increases the triggering frequency of the breathing mode of the reaction chamber.

8. The stable supply system of clean energy hydrogen production according to claim 7, characterized in that, The inlet-outlet pressure difference of the reaction chamber is the difference between the gas pressure of the gas inlet of the reaction chamber and the gas pressure of the gas outlet of the reaction chamber.

9. The stable supply system of clean energy hydrogen production according to claim 8, characterized in that, The triggering frequency of the coefficient mode of the reaction chamber is in a negative correlation with the inlet-outlet pressure difference of the reaction chamber.

10. A control method applied to the stable supply system of hydrogen produced from clean energy according to any one of claims 1-9, characterized in that, The method comprises the following steps: respectively acquiring the internal gas pressure of the gas mixing chamber and the vibration frequency of the gas mixing chamber; determining the liquid drop aggregation state according to the decrease of the internal gas pressure and the vibration frequency, so as to determine the gas flow rate into the heat preservation chamber; acquiring the switching frequency of the liquid drop aggregation state; determining the gas inlet speed of the reaction chamber according to the switching frequency; acquiring the gas pressure of the gas inlet of the reaction chamber and the gas pressure of the gas outlet of the reaction chamber after the reaction chamber is operated according to the gas inlet speed of the reaction chamber; calculating the inlet-outlet pressure difference of the reaction chamber according to the gas pressure of the gas inlet of the reaction chamber and the gas pressure of the gas outlet of the reaction chamber; determining the triggering frequency of the breathing mode of the reaction chamber according to the inlet-outlet pressure difference of the reaction chamber.

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