Method and device for preparing methanol through hydrogenation of biomass raw material

Abstract

The invention relates to a method and a device for preparing methanol by hydrogenation of a biomass raw material, and belongs to the field of hydrogen production. The invention relates to a method for preparing methanol by hydrogenation of a biomass raw material, which is characterized in that a methanol preparation center comprises a smelting furnace, a purification furnace, a vehicle-mounted PEM hydrogen production coupling device, a mixing furnace, a synthesis tower, a feedback furnace, a gas-liquid separation furnace and a methanol storage tank, and the method comprises the following steps: step 1, filling the smelting furnace with the biomass raw material, biomass raw materials in the smelting furnace are subjected to gasification reaction to generate CO and CO2 crude synthesis gas, and the CO and CO2 crude synthesis gas is sent into a purification furnace for purification; 2, mixing the purified gas with hydrogen supplied by the vehicle-mounted PEM hydrogen production coupling device in a mixing furnace to form mixed gas; 3, the mixed gas is sent to a synthesis tower for a catalytic reaction to generate a methanol mixture, the methanol mixture is separated through a gas-liquid separation furnace, then methanol is stored in a methanol storage tank, and gas separated from the gas-liquid separation furnace is sent back to the synthesis tower for secondary utilization after being subjected to temperature adjustment through a feedback furnace.

Description

Technical Field

[0001] The present invention belongs to the field of hydrogen production, and in particular relates to a method, a device and a method for preparing methanol by hydrogenating biomass raw materials. Background Art

[0002] The installed capacity and capacity of existing hydrogen production stations are mostly fixed. When new energy is connected to hydrogen production for power supply, when new energy power generation such as photovoltaic and wind turbines is connected, the fixed modular hydrogen production device cannot absorb the new energy electricity. Due to the installed capacity and capacity limitations of the hydrogen production station, it cannot absorb the new energy electricity, resulting in a waste of clean energy; when the fixed modular hydrogen production device is under maintenance, the fixed hydrogen production station cannot utilize new energy electricity on the one hand, and on the other hand, it causes a decrease in hydrogen production capacity, affecting the stable supply of hydrogen.

[0003] However, in the cold winter, due to snow accumulation and low temperatures, when solar or wind power is abandoned, it is difficult to connect the PEM hydrogen production equipment to the power supply when the photovoltaic system is coupled with the PEM hydrogen production equipment. For example, when using a cable connection, the cable needs to be manually dragged and crimped to the cable terminal board, which is time-consuming and difficult to operate. In addition, when using a vehicle-mounted hydrogen production device to produce hydrogen, due to the deviation in the positioning of the wheels and the baffle, the distance between the first power device or the second power connection unit of the PEM hydrogen production equipment and the power control cabinet deviates. When manual operation is used to connect the power supply, the cable length is insufficient due to the distance deviation, or the cable terminal holes do not match, making it impossible to screw the connecting cable terminal board between the PEM hydrogen production equipment and the power control cabinet.

[0004] Currently, 80% of methanol production comes from coal, and the proportion of methanol produced by coal gasification has continued to expand since 2010. However, coal or coal gasification to produce methanol not only brings environmental pressure, but also consumes a large amount of non-renewable resources. Using new energy to produce hydrogen and apply it to methanol production is a problem that needs to be solved to improve the renewable cycle of resources. Summary of the invention

[0005] The purpose of the present invention is to provide a method, device and method for preparing methanol by hydrogenating biomass raw materials, so as to realize the scheduling of hydrogen produced by distributed hydrogen production stations, which not only makes full use of photovoltaic and wind energy, but also avoids the consumption of coal and gas by synthesizing methanol from biomass gas, and improves the utilization rate of clean energy.

[0006] A method for preparing methanol by hydrogenating biomass raw materials, wherein the methanol preparation center comprises a refining furnace, a purification furnace, a vehicle-mounted PEM hydrogen production coupling device, a mixing furnace, a synthesis tower, a feedback furnace, a gas-liquid separation furnace and a methanol storage tank, and the method comprises the following steps:

[0007] Step 1: Fill the biomass raw materials into the furnace, and the biomass raw materials in the furnace undergo gasification reaction to generate CO and CO2 crude synthesis gas, which is then sent to the purification furnace for purification;

[0008] Step 2: The purified gas purified by the purification furnace and the hydrogen supplied by the on-board PEM hydrogen production coupling device are mixed evenly in a mixing furnace to form a mixed gas;

[0009] Step 3, the mixed gas in the mixing furnace is sent to the synthesis tower, and a catalytic reaction is carried out in the synthesis tower to generate a methanol mixture. The methanol mixture is separated by the gas-liquid separation furnace and the methanol is stored in a methanol storage tank. The gas separated by the gas-liquid separation furnace is temperature-controlled by the feedback furnace and then returned to the synthesis tower for secondary utilization.

[0010] Preferably, the method steps for preparing hydrogen by the vehicle-mounted PEM hydrogen production coupling device include:

[0011] m basic hydrogen production stations are provided within a first preset distance from the methanol production center; n regulating hydrogen production stations are provided between the first preset distance and the second preset distance from the methanol production center, and m and n are both integers greater than 1;

[0012] Each basic hydrogen production station and regulating hydrogen production station is equipped with photovoltaic panels and / or wind turbines, and the photovoltaic panels or wind turbines generate electricity to provide power for the basic hydrogen production station and the regulating hydrogen production station;

[0013] Each basic hydrogen production station and regulating hydrogen production station includes an on-board PEM hydrogen production coupling device;

[0014] The method comprises:

[0015] Step M1: Each basic hydrogen production station sets a flag a i Each regulating hydrogen production station sets a flag b j , i and j are integers greater than 1; each basic hydrogen production station a i At a fixed time or a scheduled time on the day, count the remaining hydrogen S of the on-board PEM hydrogen production coupling device in the station i ; Each regulating hydrogen production station b j At a fixed time or a scheduled time on the day, count the remaining hydrogen T of the on-board PEM hydrogen production coupling device in the station j ;

[0016] Step M2, when ∑S i >0.9P, each regulating hydrogen production station b j The distance from the methanol production center is marked as Db j , in regulating hydrogen production station b j Hydrogen balance T of vehicle-mounted PEM hydrogen production coupling device j >0.1P Select Db jThe smallest regulating hydrogen production station serves as a regulating station, and transports the basic hydrogen production station and the on-board PEM hydrogen production coupling device in the regulating station to the methanol production center.

[0017] Preferably, in step M2, if there is no hydrogen production station b j Hydrogen balance T of vehicle-mounted PEM hydrogen production coupling device j >0.1P, select Db j The minimum q regulating hydrogen production stations are used as a regulating station group, and the sum of the hydrogen surpluses of the on-board PEM hydrogen production coupling devices in the regulating station group is greater than 0.2P, [n / 8]≤q≤[n / 3], [n / 3] and [n / 8] are the integers of n / 3 and n / 8 respectively, and q is an integer. The basic hydrogen production station and the on-board PEM hydrogen production coupling device in the regulating station group are transported to the methanol preparation center.

[0018] Preferably, after step M2, the method further includes:

[0019] Step M3, when 0.6P≤∑S i ≤0.9P, for each regulating hydrogen production station b j The remaining amount of hydrogen in the on-board PEM hydrogen production coupling device on that day is T j Arrange in descending order and record it as R k , that is, sort from large to small, k is 1, 2, 3, 4...n, and sort R in descending order k Sum the first c of c is an integer and satisfies 1≤c≤n, n1 is an integer, d is the first adjustment coefficient, and d is 1.5-2; the basic hydrogen production stations and the descending order R k The first c in the figure correspond to the on-board PEM hydrogen production coupling device in the regulating hydrogen production station being transported to the methanol production center.

[0020] Preferably, after step M3, the method further includes:

[0021] Step M4, ∑S i When the pressure is <0.6P, all the on-board PEM hydrogen production coupling devices in the basic hydrogen production station and the regulating hydrogen production station will be transported to the methanol production center.

[0022] Preferably, the second preset distance is greater than the first preset distance.

[0023] Preferably, the second preset distance is the first preset distance plus the adjustment distance.

[0024] Preferably, the biomass raw materials include: one or more of straw, leaves, fruit tree branches, animal manure or fruit and vegetable leaves.

[0025] Preferably, the on-board PEM hydrogen production coupling device includes: a PEM hydrogen production device, a first power device, a second power device and a baffle, the first power device has a first power connection unit, and the second power device has a second power connection unit; the new energy photovoltaic system or wind turbine generates electricity and converges it to the power control cabinet, the power of the power control cabinet is connected to the hydrogen production control switch cabinet, and the hydrogen production control switch cabinet provides power to the on-board PEM hydrogen production coupling device through the first power connection unit or the second power connection unit.

[0026] Preferably, it also includes a device for preparing methanol by hydrogenating biomass raw materials, wherein the volume ratio of the components of the mixed gas in the device is CO:CO2:H2=9-13:8-15:70-80.

[0027] Preferably, the temperature of the catalytic reaction is 160-360° C., the reaction pressure is 5-10 MPa, and the catalyst is zirconium oxide.

[0028] Preferably, it also includes a device for preparing methanol by hydrogenating biomass raw materials, and the PEM hydrogen production coupling device includes a protection device, which cuts off the power supply of the PEM hydrogen production coupling device when the power supply fluctuation exceeds the voltage, current or frequency limit.

[0029] Optionally, a computer control device is provided in the methanol preparation center, the basic hydrogen production station and the regulating hydrogen production station, and the methanol preparation center is communicatively connected with the basic hydrogen production station and the regulating hydrogen production station.

[0030] Beneficial technical effects:

[0031] Using renewable energy sources such as photovoltaics and wind power to produce hydrogen at distributed hydrogen production stations, and transporting the produced hydrogen to methanol preparation centers for further synthesis of methanol, not only improves the absorption capacity of photovoltaic and wind energy, but also avoids the additional energy, process equipment and electrode materials consumed by electrolysis of water to produce hydrogen, and also improves the utilization rate of renewable energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0033] Figure 1A This is a schematic diagram of the methanol production center process.

[0034] Figure 1B This is the layout diagram of the existing hydrogen production station.

[0035] Figure 2This is a schematic diagram of installing a skid-mounted parking space at a fixed modular hydrogen production device site according to an embodiment of the present invention.

[0036] Figure 3 This is a schematic diagram of the connection between multiple hydrogen production stations and a methanol production center according to an embodiment of the present invention.

[0037] Figure 4 This is a structural diagram of a new energy PEM hydrogen production system according to an embodiment of the present invention.

[0038] Figure 5 This is a schematic diagram of a vehicle-mounted hydrogen production device according to an embodiment of the present invention.

[0039] Figure 6 Schematic diagram of a PEM hydrogen production unit according to an embodiment of the present invention.

[0040] Figure 7 This is a schematic diagram of the vehicle-mounted hydrogen production device and the baffle position according to an embodiment of the present invention.

[0041] Figure 8 This is a schematic diagram of the connection between the PEM hydrogen production equipment and the hydrogen production control switch cabinet according to an embodiment of the present invention.

[0042] Fig. 9 It is a schematic diagram of angle correction of PEM hydrogen production equipment and hydrogen production control switch cabinet according to an embodiment of the present invention.

[0043] Fig.10 Schematic diagram of the embodiment of the present invention before and after angle correction.

[0044] Fig.11 It is a schematic diagram of vertical direction correction and horizontal direction correction according to an embodiment of the present invention.

[0045] Fig.12 This is a schematic diagram of a gas storage cylinder and a valve according to an embodiment of the present invention.

[0046] Figure 13-14 Schematic diagram of a servo motor according to an embodiment of the present invention.

[0047] Figure 15-23 It is a partial schematic diagram of the tooth roots and tooth shoes of the teeth on the stator core of the servo motor according to an embodiment of the present invention.

[0048] Fig.24 Schematic diagram of the output driving force and rotation angle of the servo motor according to an embodiment of the present invention. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0050] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0051] Embodiment 1

[0052] As shown in FIG1-3, a method for preparing methanol by hydrogenating biomass raw materials includes a methanol preparation center 9, and m basic hydrogen production stations are arranged within a first preset distance from the methanol preparation center 9, denoted as a1, a2, a3, a4...a m ; n regulating hydrogen production stations are provided between the first preset distance and the second preset distance from the methanol production center 9, denoted as b1, b2, b3, b4, b5, b6, ... b n , m and n are both integers greater than 1, the first preset distance can be 100-300km, the second preset distance can be the first preset distance plus the adjustment distance, and the adjustment distance can be 200-400km.

[0053] Optionally, the first preset distance and the second preset distance are both ranges within which a circle with the methanol preparation center 9 as the center lies.

[0054] Each basic hydrogen production station and regulating hydrogen production station is equipped with photovoltaic panels and / or wind turbines, and the photovoltaic panels or wind turbines generate electricity to provide power for the basic hydrogen production station and the regulating hydrogen production station.

[0055] Optionally, the distance between each basic hydrogen production station and the methanol production center 9 is the same or different.

[0056] Optionally, the distance between each regulating hydrogen production station and the methanol production center 9 is the same or different.

[0057] Each basic hydrogen production station and regulating hydrogen production station includes a skid-mounted modular hydrogen production device and / or a fixed modular hydrogen production device.

[0058] The fixed modular hydrogen production device includes an electrolyzer 100, hydrogen production auxiliary equipment 101, purification equipment 102, a water supply tank 104, a water supply pump 105, a catalyst box 106, a power conversion device 107, a transformer 108, a control cabinet 103 and a hydrogen storage area 109. The water supply tank 104, the catalyst box 106 and the water supply pump 105 are connected in sequence and connected to the electrolyzer 100 to provide electrolyte; the control cabinet 103 is connected to the power conversion device 107 and the transformer 108 to monitor and control the power system, and the power of the transformer 8 is converted by the power conversion device 107 to supply power to the electrolyzer 100.

[0059] The hydrogen in the electrolyzer 100 is transported to the hydrogen production auxiliary equipment 101 and the purification equipment 102 through an underwater gas pipeline for processing to produce high-purity hydrogen, which is then transported to the hydrogen storage area 109 through a gas pipeline 1091 for storage.

[0060] See Figure 1- Figure 4 The skid-mounted modular hydrogen production device is a vehicle-mounted PEM hydrogen production coupling device 4, and the vehicle-mounted PEM hydrogen production coupling device 4 is movable.

[0061] The site of the fixed modular hydrogen production device is provided with a skid-mounted parking space 110, which is specifically divided into skid-mounted parking space 1, parking space 2, parking space 3, ..., parking space n1, where n1 is a positive integer. The skid-mounted parking space is used for parking the vehicle-mounted PEM hydrogen production coupling device 4. The fixed modular hydrogen production device and the skid-mounted modular hydrogen production device respectively utilize the photovoltaic or wind power energy in the basic hydrogen production station and the regulating hydrogen production station to produce hydrogen.

[0062] like Figure 4-Figure 11 As shown, the new energy photovoltaic system 1, the power control cabinet 2, the hydrogen production control switch cabinet 3 and the PEM hydrogen production equipment 4, the new energy photovoltaic system 1 generates electricity and converges it to the power control cabinet 2, and the hydrogen production control switch cabinet 3 controls the power on and off between the power control cabinet 2 and the PEM hydrogen production equipment 4. The power control cabinet 2 and the hydrogen production control switch cabinet 3 are located at the site where the fixed modular hydrogen production device of the hydrogen production station is located.

[0063] Optionally, the PEM hydrogen production equipment 4 is also a vehicle-mounted PEM hydrogen production coupling device 4, which includes a PEM hydrogen production device 7, a first power device 5, a second power device 6 and a baffle 8, the first power device 5 has a first power connection unit 51, and the second power device 6 has a second power connection unit 61.

[0064] Modularization means that the vehicle-mounted PEM hydrogen production coupling device 4 is driven into the skid-mounted parking space set up in the area where the modular hydrogen production device is fixed like multiple modules. Only one vehicle-mounted PEM hydrogen production coupling device 4 can work, or multiple vehicle-mounted PEM hydrogen production coupling devices 4 can work simultaneously.

[0065] like Figure 5As shown, the PEM hydrogen production device 7 includes a hydrogen production unit, a power input terminal 71 and a hydrogen storage unit, and the first power connection unit 51 or the second power connection unit 61 is electrically connected to the power input terminal 71.

[0066] Hydrogen production unit: Hydrogen is produced by direct decomposition of water, which can be achieved in a variety of ways: the water decomposition method for hydrogen production specifically includes electrolysis of water, photocatalytic decomposition of water, or thermochemical cycle decomposition of water. Use electricity to electrolyze water to generate hydrogen and oxygen; use solar energy, wind energy, or geothermal energy to decompose water to produce hydrogen through a thermochemical cycle; use light energy to directly decompose water through a catalyst to produce hydrogen. The produced hydrogen enters the hydrogen storage unit for storage. Hydrogen is mainly produced by decomposing water, and the implementation method can be, but is not limited to, photolysis of water, electrolysis of water, pyrolysis of water, etc.

[0067] Hydrogen storage unit: includes hydrogen storage material and hydrogen storage tank, which is provided with hydrogen inlet and hydrogen outlet, and the hydrogen storage material is located inside the hydrogen storage tank. The tank body of the hydrogen storage tank can be made of polytetrafluoroethylene material, stainless steel and other materials, which are characterized by high pressure resistance, anti-permeability and corrosion resistance.

[0068] Hydrogen storage materials mainly include the following categories: 1) Physical adsorption hydrogen storage materials - reversibly adsorbed on high specific surface area porous materials through physical action, such as carbon-based materials (graphite, activated carbon, carbon nanotubes) or inorganic porous materials (such as zeolite molecular sieves) and metal organic frameworks (MOFs), etc. The metal organic framework (MOF) is Cu2(L2)(H2O)2, IRMOF-11 or IRMOF-20, etc. 2) Metal hydride hydrogen storage materials - including light metal hydrides (such as Mg-based series, specifically single magnesium hydrogen storage materials, magnesium-based composite hydrogen storage materials and magnesium-based alloy hydrogen storage materials) or advanced alloy hydrides (such as LaNi5 or TiFe alloys, etc.). 3) Chemical hydride hydrogen storage materials - including sodium aluminum hydride, lithium aluminum hydride, calcium aluminum hydride, lithium nitrogen hydrogen system or ammonia borane, etc. 4) Organic liquid hydrogen storage materials - including aromatic ring compounds such as benzene, toluene, naphthalene and condensed heterocyclic compounds. The catalyst is a noble metal catalyst, a Ni catalyst, a homogeneous catalyst, or the like.

[0069] In the cold winter, due to snow accumulation and low temperatures, when solar or wind power is abandoned, it is difficult to connect the PEM hydrogen production equipment 4 to the power supply when the photovoltaic system 1 is coupled to the PEM hydrogen production equipment 4. For example, when a cable is used for connection, the cable needs to be manually dragged and crimped to the cable terminal board, which is time-consuming and difficult to operate. In addition, when hydrogen is produced using a vehicle-mounted hydrogen production device, due to the positioning deviation of the wheels and the baffle 8, the distance between the first power connection unit 51 or the second power connection unit 61 of the PEM hydrogen production equipment 4 and the power control cabinet 2 deviates. When manual operation is used to connect the power supply, the cable length is insufficient and cannot be connected due to the distance deviation, or the cable terminal holes do not match, making it impossible to screw the connecting cable terminal board between the PEM hydrogen production equipment 4 and the power control cabinet 2.

[0070] The present application sets up a hydrogen production control switch cabinet 3 between the PEM hydrogen production equipment 4 and the power control cabinet 2 to facilitate the automatic connection of the PEM hydrogen production equipment 4 to the power control cabinet 2, thereby reducing the problem of insufficient cable length for connection or mismatched cable terminal holes causing the inability to screw the connecting cable terminal board between the PEM hydrogen production equipment 4 and the power control cabinet 2.

[0071] Figure 7 This is a schematic diagram of the vehicle-mounted hydrogen production equipment and the baffle position according to an embodiment of the present invention, wherein Figure 7 Part 7a is when the wheels of the PEM hydrogen production equipment 4 are precisely positioned through the baffle 8, the first power connection unit 51 of the first power device 5 is directly opposite to the power interface 31 of the hydrogen production control switch cabinet 3; Figure 7 Part 7b shows that when the wheels of the PEM hydrogen production equipment 4 do not contact the baffle 8, a distance deviation occurs between the first power connection unit 51 of the first power device 5 and the power interface 31 of the hydrogen production control switch cabinet 3; Figure 7 Part 7c shows that when the wheels of the PEM hydrogen production equipment 4 exceed the baffle 8, a distance deviation occurs between the first power connection unit 51 of the first power device 5 and the power interface 31 of the hydrogen production control switch cabinet 3; Figure 7 Part 7d shows that when an angle deviation occurs between the wheel of the PEM hydrogen production equipment 4 and the baffle 8 , an angle deviation occurs between the first power connection unit 51 of the first power device 5 and the power interface 31 of the hydrogen production control switch cabinet 3 .

[0072] The first power connection unit 51 of the first power device 5 of the PEM hydrogen production equipment 4 has a telescopic rod 52 and L1~L3 three-phase terminals 53 located at the end of the telescopic rod 52. After the telescopic rod 52 extends out of the first power connection unit 51, it pushes the L1~L3 three-phase terminals 53 to contact the power terminals on the power interface 31 of the hydrogen production control switch cabinet 3 to provide power to the PEM hydrogen production equipment 4.

[0073] See also Figure 7Parts 7b-7d show that when there is a distance or angle deviation between the wheel of the PEM hydrogen production equipment 4 and the baffle 8, the contact between the telescopic rod 52 and the power terminal on the power interface 31 of the hydrogen production control switch cabinet 3 after extending out of the first power connection unit 51 will deviate, affecting the reliability of power supply.

[0074] Angle correction: The wheels of the PEM hydrogen production equipment 4 are positioned by the baffle 8 and then angle corrected. A first infrared distance sensor 54 and a second infrared distance sensor 55 are symmetrically arranged on the left and right sides of the first power connection unit 51. The distance between the first infrared distance sensor 54 and the second infrared distance sensor 55 is CD. The center lines of the first infrared distance sensor 54 and the second infrared distance sensor 55 are perpendicular to their installation planes on the first power device 5. The first infrared distance sensor 54 measures the distance between the PEM hydrogen production equipment 4 and the hydrogen production control switch cabinet 3 as AD. The second infrared distance sensor 55 measures the distance between the PEM hydrogen production equipment 4 and the hydrogen production control switch cabinet 3 as BC. A line parallel to the line segment CD through point A intersects the line segment BC at point E. After the telescopic rod 52 extends out of the first power connection unit 51, the deflection angle is ∠BAE=arc(tan((BC-AD) / CD)). Since BC>AD, the deflection direction is from the second infrared distance sensor 55 to the first infrared distance sensor 54.

[0075] Due to the distance or angle deviation between the wheel of the PEM hydrogen production equipment 4 and the baffle 8, as well as the displacement change in the vertical direction of the first power connection unit 51 caused by the wheel air pressure, after the angle correction, there is a vertical and horizontal deviation between the L1~L3 three-phase terminals 53 and the power terminals on the power interface 31 of the hydrogen production control switch cabinet 3 after the telescopic rod 52 extends out of the first power connection unit 51.

[0076] Vertical correction: Since the deviation caused by the wheel air pressure generally causes the center of gravity of the first power connection unit 51 to drop, a first position sensor 32 and a second position sensor 33 are provided on the hydrogen production control switch cabinet 3. After the telescopic rod 52 extends out of the first power connection unit 51, the L1-L3 three-phase terminals 53 contact the hydrogen production control switch cabinet 3 and then move vertically upward. After the L1-L3 three-phase terminals 53 contact the first position sensor 32, the movement of the telescopic rod 52 is stopped, and the vertical correction is in place.

[0077] Horizontal correction: Due to the distance or angle deviation between the wheels of the PEM hydrogen production equipment 4 and the baffle 8, the second position sensor 33 is set on the side close to the baffle 8. After the vertical correction is in place, the L1~L3 three-phase terminals 53 move horizontally toward the second position sensor 33. After the L1~L3 three-phase terminals 53 contact the second position sensor 33, the movement of the telescopic rod 52 is stopped, and the horizontal correction is in place.

[0078] After the angle correction, vertical direction correction and horizontal direction correction are in place, the circuit breaker in the hydrogen production control switch cabinet 3 is controlled to close, so as to realize the power supply of the PEM hydrogen production equipment 4 to prepare hydrogen.

[0079] A plurality of baffles 8 are provided to position a plurality of rear wheels of the PEM hydrogen production device 4 .

[0080] The methanol preparation center includes a refining furnace, a purification furnace, a vehicle-mounted PEM hydrogen production coupling device, a mixing furnace, a synthesis tower, a feedback furnace, a gas-liquid separation furnace and a methanol storage tank. The method includes the following steps:

[0081] Step 1: Fill the biomass raw materials into the furnace, and the biomass raw materials in the furnace undergo gasification reaction to generate CO and CO2 crude synthesis gas, which is then sent to the purification furnace for purification;

[0082] Step 2: The purified gas purified by the purification furnace and the hydrogen supplied by the vehicle-mounted PEM hydrogen production coupling device are mixed evenly in a mixing furnace to form a mixed gas;

[0083] Step 3, the mixed gas in the mixing furnace is sent to the synthesis tower, and a catalytic reaction is carried out in the synthesis tower to generate a methanol mixture. The methanol mixture is separated by the gas-liquid separation furnace and the methanol is stored in a methanol storage tank. The gas separated by the gas-liquid separation furnace is temperature-controlled by the feedback furnace and then returned to the synthesis tower for secondary utilization.

[0084] The methanol production center 9 dispatches each basic hydrogen production station and adjusts the on-board PEM hydrogen production coupling device in the hydrogen production station. The on-board PEM hydrogen production coupling device transports the prepared hydrogen along the road to the methanol production center 9 to synthesize methanol in the methanol production center 9. The method for preparing methanol by hydrogenating biomass raw materials includes the following steps:

[0085] Step M1: Each basic hydrogen production station sets a flag a i Each regulating hydrogen production station sets a flag b j , i and j are integers greater than 1; each basic hydrogen production station a i At a fixed time or a scheduled time on the day, count the remaining hydrogen S of the on-board PEM hydrogen production coupling device in the station i ; Each regulating hydrogen production station b j At a fixed time or a scheduled time on the day, count the remaining hydrogen T of the on-board PEM hydrogen production coupling device in the station j The fixed time may be, for example, 17:00-19:00 or 19:00-20:00 every day; the amount of hydrogen required by the methanol preparation center 9 for the next day is recorded as P, and the next day is the day after the current day or the day after the current day. For example, if the current day is June 3, the next day is June 4;

[0086] Step M2, when ∑S i >0.9P,∑Si For S i Sum, each regulating hydrogen production station b j The distance from the methanol production center 9 is marked as Db j , in regulating hydrogen production station b j Hydrogen balance T of vehicle-mounted PEM hydrogen production coupling device j >0.1P Select Db j The smallest regulating hydrogen production station is used as a regulating station, and the basic hydrogen production station and the vehicle-mounted PEM hydrogen production coupling device in the regulating station are transported to the methanol preparation center 9; in this step, since the regulating hydrogen production station is far away from the methanol preparation center 9, only part of the vehicle-mounted PEM hydrogen production coupling devices of the regulating hydrogen production station are dispatched, which saves transportation capacity and energy, improves device efficiency, and improves the economic efficiency of methanol preparation;

[0087] Optionally, in step M2, if there is no hydrogen production station b j Hydrogen balance T of vehicle-mounted PEM hydrogen production coupling device j >0.1P, select Db j The minimum q regulating hydrogen production stations are used as a regulating station group, and the sum of the hydrogen surplus of the on-board PEM hydrogen production coupling device of the regulating station group is greater than 0.2P, [n / 8]≤q≤[n / 3], [n / 3] and [n / 8] are the integers of n / 3 and n / 8 respectively, and q is an integer. The basic hydrogen production station and the on-board PEM hydrogen production coupling device in the regulating station group are transported to the methanol preparation center 9; in this step, a plurality of regulating hydrogen production stations are used to form a regulating station group, which reduces the dispatch of the on-board PEM hydrogen production coupling devices in all regulating hydrogen production stations, saves transportation capacity and energy, improves device efficiency, and improves the economic efficiency of methanol preparation;

[0088] Step M3, when 0.6P≤∑S i ≤0.9P, for each regulating hydrogen production station b j The remaining amount of hydrogen in the on-board PEM hydrogen production coupling device on that day is T j Arrange in descending order and record it as R k , that is, sort from large to small, k is 1, 2, 3, 4...n, it can be understood that R1>R2, R2>R3, for descending order R k Sum the first c of c is an integer and satisfies 1≤c≤n, n1 is an integer, d is the first adjustment coefficient, d is 1.5-2, and by setting the first adjustment coefficient, the hydrogen surplus of the selected basic hydrogen production station and the on-board PEM hydrogen production coupling device of the adjustment hydrogen production station is greater than the hydrogen demand P of the methanol preparation center 9, and a margin is left; the basic hydrogen production station and the vehicle-mounted PEM hydrogen production coupling device of the adjustment hydrogen production station are arranged in descending order R kThe first c corresponding on-board PEM hydrogen production coupling devices in the regulating hydrogen production station are transported to the methanol preparation center 9, reducing the dispatch of all on-board PEM hydrogen production coupling devices in the regulating hydrogen production station, saving transportation capacity and energy, improving device efficiency, and improving the economic efficiency of methanol preparation;

[0089] Step M4, ∑S i When the pressure is less than 0.6P, all the on-board PEM hydrogen production coupling devices in the basic hydrogen production station and the regulating hydrogen production station shall be transported to the methanol production center 9.

[0090] The biomass raw materials include: one or more of straws, leaves, fruit tree branches, animal excrement or fruit and vegetable leaves.

[0091] Embodiment 2

[0092] The difference between this embodiment and the first embodiment is that the second power device 6 is used to realize that the power control cabinet 2 supplies power to the PEM hydrogen production equipment 4 .

[0093] Embodiment 3

[0094] The present embodiment is different from the first embodiment in that the second power device 5 and the second power device 6 are simultaneously used to realize that the power control cabinet 2 supplies power to the PEM hydrogen production equipment.

[0095] Embodiment 4

[0096] The difference between this embodiment and the first embodiment is that the method further includes the steps of: after the controller automatically controls the telescopic rod 52 to extend out of the first power connection unit 51 located on the PEM hydrogen production equipment 4, when the moving distance of the telescopic rod 52 reaches 0.6-0.8 times the distance of the line segment AD, the controller controls the telescopic rod 52 to stop for a preset time, for example, 10-30 seconds or 1 minute, and turns on the warm air nozzle on the hydrogen production control switch cabinet 3 for 1-2 minutes to remove rain, snow or moisture on the L1~L3 three-phase terminals 53 on the telescopic rod 52 to improve electrical safety.

[0097] Optionally, the telescopic rod 52 is covered with an insulating outer sheath to improve electrical safety.

[0098] Embodiment 5

[0099] The difference between this embodiment and the first embodiment is that the basic hydrogen production station with the shortest distance from the methanol production center among all the basic hydrogen production stations is the first backup hydrogen storage station;

[0100] The regulating hydrogen production station that is the shortest distance from the methanol production center among all regulating hydrogen production stations is the second backup hydrogen storage station;

[0101] In ∑S iWhen the pressure is less than 0.3P, the hydrogen produced by the fixed modular hydrogen production devices of the first backup hydrogen storage station and the second backup hydrogen storage station will be transported to the methanol preparation center to compensate for the shortage of hydrogen produced by the on-board PEM hydrogen production coupling device in the basic hydrogen production station.

[0102] Embodiment 6

[0103] The difference between this embodiment and the first embodiment is that the first embodiment considers transporting hydrogen from the distributed hydrogen production station to the methanol production center, but the ratio of hydrogen and other gases when mixed is precisely controlled, and the on-board PEM hydrogen production coupling device controls the on-off of the gas cylinder pipeline by a valve. According to the ratio of hydrogen and other gases, the gas cylinder valve is sometimes opened, and sometimes reduced or closed, that is, the opening of the gas cylinder valve increases and decreases in a certain range. This feature requires the gas cylinder valve to be more accurately and reliably controlled to avoid the instability of the hydrogen ratio and thus affect the yield rate of methanol production. This embodiment controls the valve opening by a servo motor, thereby improving the valve control accuracy and reliability.

[0104] like Figure 12-14 As shown, the box of the PEM hydrogen production device 7 of the vehicle-mounted PEM hydrogen production coupling device includes a fixed bracket 204, and each row of the fixed bracket 204 is fixedly provided with a plurality of gas cylinders 205. The upper end of each gas cylinder 205 is provided with a separate valve 202 which is serially connected in the gas distribution pipe and controls the opening and closing of the gas cylinder 205. The gas distribution pipes on each row of gas cylinders 205 are connected in parallel to the trunk pipe, and the trunk pipe is provided with a main gas valve 201 and a pressure gauge 203; a weight sensor 206 is provided at the bottom of the gas cylinder 205. The trunk pipe after the pressure gauge 203 is connected to the pipeline leading to the central mixing furnace of methanol preparation through a flange.

[0105] The opening degrees of the separate valve 202 and the main gas valve 201 are controlled by different servo motors, that is, the servo motor controls the opening and closing of the separate valve 202 and the main gas valve 201 .

[0106] Optionally, the separate valve 202 and the main gas valve 201 are controlled by servo motors with different current levels, and the different current levels result in different output driving forces of the servo motors. For example, the current level of the servo motor corresponding to the separate valve 202 is 0.5A, and the current level of the servo motor corresponding to the main gas valve 201 is 1.5A.

[0107] The servo motor includes a stator core 301, a rotor, a stator winding 302, an angle detection device, a housing 308, an end cover 310 and a bearing 309. The stator core 301 is arranged in the housing 308. The inner side of the stator core 301 of the stator is provided with four teeth arranged at equal angles along the circumferential direction. The stator winding 302 is wound around the four teeth respectively. The rotating shaft 306 of the rotor is assembled between the end cover 310 and the housing 308 through the bearing 309. The rotor is located inside the stator for rotation. The tooth includes a tooth root 311 and a tooth shoe 312. A stator slot 313 is provided between two teeth. The angle detection device includes a Hall sensor 303 and an annular Hall rack 304. The annular Hall rack 304 is arranged outside the bearing seat of the bearing 309. The Hall sensor 303 is fixed on the annular Hall rack 304. The Hall sensor is used to sense the magnetic field strength of the permanent magnet 307.

[0108] The rotor includes a rotating shaft 306, a yoke 305 and a permanent magnet 307. The rotating shaft 306 fixes the yoke 305 and the permanent magnet 307 and outputs driving force as the output axial discrete valve 202 and the main gas valve 201. The yoke 305 is made of soft magnetic material; the permanent magnet 307 is made of neodymium iron boron. Two adjacent permanent magnets 307 close to the Hall sensor 303 in the angle detection device provide induced magnetic flux for the Hall sensor 303, so that the Hall sensor 303 outputs a corresponding voltage signal, thereby determining the displacement of the rotor, thereby measuring the angular position of the servo motor in real time to control the rotation angle of the servo motor. The yoke 305 is sleeved and fixed on the rotating shaft 306. An even number of radially magnetized permanent magnets 307 are evenly distributed around the yoke 305. In this embodiment, the number of permanent magnets 307 is 4, and the polarities of the four permanent magnets 307 are staggered, that is, the four permanent magnets 307 are staggered along NSNS. Optionally, the four permanent magnets 307 are tile-shaped or arc-shaped and have equal thickness along the radial direction of the rotor, so as to reduce the change of the magnetic lines of force of the teeth during the movement of the rotor, thereby eliminating the torque fluctuation caused by the change of magnetic flux.

[0109] Optionally, a gap is provided between two adjacent permanent magnets 307 , and the gap is 0.5-0.8 of the air gap between the tooth shoe 312 and the permanent magnet 307 .

[0110] Changing the current polarity and amplitude of the stator winding 302 can adjust the direction and magnitude of the output torque of the servo motor. The Hall sensor 303 monitors the angular position in real time to achieve the function of accurately controlling the rotation angle of the servo motor.

[0111] like Figure 15-23 A partial schematic diagram of a tooth root 311 and a tooth shoe 312 is shown. Figure 16-23 For identification of the middle tooth root 311, tooth shoe 312 and axis, see Fig.15 .

[0112] Preferably, Fig.15 As shown, the tooth shoe 312 has three arc surfaces on one side of the axis of the tooth root 311, and the three arc surfaces include a first arc surface f, a second arc surface f1 and a third arc surface f2. The centers of the first arc surface f, the second arc surface f1 and the third arc surface f2 are all facing the permanent magnet 307 side, the first arc surface f faces the permanent magnet 307, the second arc surface f1 and the third arc surface f2 are away from the permanent magnet 307, wherein the second arc surface f1 connects the tooth root 311, the third arc surface f2 connects the first arc surface f and the second arc surface f1, the radius r1 of the second arc surface f1 is smaller than the radius r2 of the third arc surface f2, and the distances between each point on the first arc surface f and the outer arc surface of the permanent magnet 307 are equal.

[0113] Preferably, Fig.16 As shown, the tooth shoe 312 has three arc surfaces on one side of the axis of the tooth root 311, and the three arc surfaces include a first arc surface f, a second arc surface f4 and a third arc surface f3. The centers of the first arc surface f and the second arc surface f4 are both toward the permanent magnet 307 side, and the center of the third arc surface f3 is toward the tooth root 311 side. The first arc surface f faces the permanent magnet 307, and the second arc surface f4 faces away from the permanent magnet 307, wherein the second arc surface f4 is connected to the tooth root 311, and the third arc surface f3 is connected to the first arc surface f and the second arc surface f4, and the radius r3 of the third arc surface f4 is 2mm≤r3≤8mm.

[0114] Preferably, Fig.17 As shown, the tooth shoe 312 has two arc surfaces and a plane f6 on one side of the axis of the tooth root 311, the two arc surfaces include a first arc surface f and a second arc surface f5, the centers of the first arc surface f and the second arc surface f5 are both facing the permanent magnet 307 side, the plane f6 connects the tooth root 311, the second arc surface f5 connects the first arc surface f and the plane f6, the radius r4 of the second arc surface f5, 10mm≤r4≤40mm.

[0115] Preferably, Fig.18 As shown, the tooth shoe 312 has three arc surfaces on one side of the axis of the tooth root 311, and the three arc surfaces include a first arc surface f, a second arc surface f18 and a third arc surface f19. The centers of the first arc surface f and the third arc surface f19 are both toward the permanent magnet 307 side, and the center of the second arc surface f18 is toward the stator slot 313 side. The first arc surface f faces the permanent magnet 307, and the second arc surface f18 and the third arc surface f19 are away from the permanent magnet 307. The second arc surface f18 is tangent to the straight line surface f17 on the tooth root 311, and the third arc surface f19 connects the first arc surface f and the second arc surface f18. By setting the second arc surface f18 tangent to the straight line surface f17 on the tooth root 311, the output driving force of the rotating shaft 306 is more stable.

[0116] Preferably, Fig.19As shown, the tooth shoe 312 has an arc surface and two planes on one side of the axis of the tooth root 311, the two planes include a first plane f8 and a second plane f9, the arc surface includes a first arc surface f, the center of the first arc surface f faces the permanent magnet 307 side, the first plane f8 connects the straight line surface f7 on the tooth root 311, the second plane f9 connects the first arc surface f and the first plane f8, and the angle r4 between the first plane f8 and the second plane f9 is 120°≤r4≤160°; optionally, the second plane f9 is parallel to the straight line surface f7 on the tooth root 311.

[0117] Preferably, Fig. 20 As shown, the tooth shoe 312 has two arc surfaces and one plane on one side of the axis of the tooth root 311, the plane includes a first plane f12, the arc surface includes a first arc surface f and a second arc surface f11, the centers of the first arc surface f and the second arc surface f11 are both facing the permanent magnet 307 side, the second plane f11 connects the straight line surface f10 on the tooth root 311, and the first plane f12 connects the first arc surface f and the second arc surface f11; optionally, the first plane f12 is parallel to the straight line surface f10 on the tooth root 311.

[0118] Preferably, Fig.21 As shown, the tooth shoe 312 has three arc surfaces and a plane f14 on one side of the axis of the tooth root 311, the three arc surfaces include a first arc surface f, a second arc surface f13 and a third arc surface f15, the centers of the first arc surface f and the second arc surface f13 are both facing the permanent magnet 307 side, the center of the third arc surface f15 is facing the tooth root 311 side, the second arc surface f13 is connected to the straight line surface f16 on the tooth root 311, the third arc surface f15 is connected to the first arc surface f, the plane f14 connects the second arc surface f13 and the third arc surface f15, the radius r6 of the third arc surface f15, 5mm≤r4≤65mm; optionally, the plane f14 is parallel to the straight line surface f16 on the tooth root 311.

[0119] Preferably, Fig. 22 As shown, the tooth shoe 312 has two arc surfaces and a plane f22 on one side of the axis of the tooth root 311, the two arc surfaces include a first arc surface f and a second arc surface f21, the center of the first arc surface f faces the permanent magnet 307 side, the center of the second arc surface f21 faces the stator slot 313 side, the first arc surface f faces the permanent magnet 307, and the second arc surface f21 faces away from the permanent magnet 307, wherein the second arc surface f21 is tangent to the straight line surface f20 on the tooth root 311, and the plane f22 connects the first arc surface f and the second arc surface f21, and by setting the second arc surface f21 tangent to the straight line surface f20 on the tooth root 311, the output driving force of the rotating shaft 306 is more stable.

[0120] Preferably, Fig.23As shown, the tooth shoe 312 has three arc surfaces and one plane f26 on one side of the axis of the tooth root 311, the three arc surfaces include a first arc surface f, a second arc surface f24 and a third arc surface f25, the centers of the first arc surface f and the third arc surface f25 are both facing the permanent magnet 307 side, the center of the second arc surface f24 is facing the stator slot 313 side, the first arc surface f faces the permanent magnet 307, the second arc surface f24 and the third arc surface f25 are away from the permanent magnet 307, wherein the second arc surface f24 is tangent to the straight line surface f23 on the tooth root 311, the third arc surface f25 connects the second arc surface f24, and the plane f26 connects the third arc surface f25 and the first arc surface f; optionally, the plane f26 is parallel to the straight line surface f23 on the tooth root 311.

[0121] like Fig.24 As shown, the servo motor of this embodiment achieves stability in the output driving force at different driving currents in the angle range of -50°-50°, thereby avoiding the influence of the fluctuation of the output driving force on the opening of the separate valve 202 and the main gas valve 201, improving the accuracy of the hydrogen supply, and improving the yield rate of methanol preparation.

[0122] Optionally, in step M5, a servo motor is used to control the opening of a separate valve 202 and a main gas valve 201 connected to a gas storage bottle 205 in the vehicle-mounted PEM hydrogen production coupling device. Optionally, the servo motor is set to 1-8 drive current levels, and an intelligent controller is also set on the servo motor. The intelligent controller automatically sets different drive current levels according to different output driving forces to improve the supply accuracy of hydrogen components and improve the yield rate of methanol preparation.

[0123] Preferably, three gas cylinders 205 are arranged in each row of the fixed bracket 204, and a separate valve 202 is arranged in the gas distribution pipe on each gas cylinder 205 in each row, and the gas distribution pipes on the three gas cylinders 205 in each row are connected to the trunk pipe in parallel after passing through the separate valve 202, and a main gas valve 201 is arranged on the trunk pipe. When at least one corresponding separate valve 202 of the three gas cylinders 205 arranged in each row is driven by a servo motor to rotate at an angle between -10° and 10°, the main gas valve 201 is driven by a servo motor to rotate at an angle between -15° and 15°. ° to 15°; when at least one of the three gas cylinders 205 arranged in each row has a corresponding separate valve 202 that is driven by a servo motor to rotate at an angle in the range of -15° to 15°, the main gas valve 201 is driven by a servo motor to rotate at an angle in the range of -25° to 25°; when at least one of the three gas cylinders 205 arranged in each row has a corresponding separate valve 202 that is driven by a servo motor to rotate at an angle in the range of -20° to 20°, the main gas valve 201 is driven by a servo motor to rotate at an angle in the range of -35° to 35°.

[0124] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0125] It should be noted that the serial numbers of the embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0126] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, and the contents of the above embodiments can be arbitrarily combined in part or in whole, or directly or indirectly applied to other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for preparing methanol by hydrogenating biomass raw materials, used in a methanol preparation system, characterized in that: The methanol preparation system includes a methanol preparation center, which includes a refining furnace, a purification furnace, a vehicle-mounted PEM hydrogen production coupling device, a mixing furnace, a synthesis tower, a feedback furnace, a gas-liquid separation furnace and a methanol storage tank. The method includes the following steps: Step 1: Fill the biomass raw materials into the furnace, and the biomass raw materials in the furnace undergo gasification reaction to generate CO and CO2 crude synthesis gas, which is then sent to the purification furnace for purification; Step 2: The purified gas purified by the purification furnace and the hydrogen supplied by the on-board PEM hydrogen production coupling device are mixed evenly in a mixing furnace to form a mixed gas; Step 3, the mixed gas in the mixing furnace is sent to the synthesis tower for catalytic reaction to generate a methanol mixture, the methanol mixture is separated by the gas-liquid separation furnace and the methanol is stored in a methanol storage tank, and the gas separated by the gas-liquid separation furnace is temperature-controlled by the feedback furnace and then returned to the synthesis tower for secondary utilization.

2. The method according to claim 1, characterized in that: The methanol preparation system vehicle is provided with m basic hydrogen production stations within a first preset distance from the methanol preparation center; n regulating hydrogen production stations are provided between the first preset distance and the second preset distance from the methanol preparation center, and m and n are both integers greater than 1; Each basic hydrogen production station and regulating hydrogen production station is equipped with photovoltaic panels and / or wind turbines, and the photovoltaic panels or wind turbines generate electricity to provide power for the basic hydrogen production station and the regulating hydrogen production station; Each basic hydrogen production station and regulating hydrogen production station includes an on-board PEM hydrogen production coupling device; The method steps of preparing hydrogen by the vehicle-mounted PEM hydrogen production coupling device include: Step M1: Each basic hydrogen production station sets a flag a i Each regulating hydrogen production station sets a flag b j , i and j are integers greater than 1; Each basic hydrogen production station a i At a fixed time or a scheduled time on the day, count the remaining hydrogen S of the on-board PEM hydrogen production coupling device in the station i ; Each regulating hydrogen production station b j At a fixed time or a scheduled time on the day, count the remaining hydrogen T of the on-board PEM hydrogen production coupling device in the station j ; Step M2, when ∑S i >0.9P, each regulating hydrogen production station b j The distance from the methanol production center is marked as Db j , in regulating hydrogen production station b j Hydrogen balance T of vehicle-mounted PEM hydrogen production coupling device j >0.1P Select Db j The smallest regulating hydrogen production station serves as a regulating station, and transports the basic hydrogen production station and the on-board PEM hydrogen production coupling device in the regulating station to the methanol production center.

3. The method according to claim 2, characterized in that In step M2, if there is no hydrogen production station b j Hydrogen balance T of vehicle-mounted PEM hydrogen production coupling device j >0.1P, select Db j The minimum q regulating hydrogen production stations are used as a regulating station group, and the sum of the hydrogen surpluses of the on-board PEM hydrogen production coupling devices in the regulating station group is greater than 0.2P, [n / 8]≤q≤[n / 3], [n / 3] and [n / 8] are the integers of n / 3 and n / 8 respectively, and q is an integer. The basic hydrogen production station and the on-board PEM hydrogen production coupling device in the regulating station group are transported to the methanol preparation center.

4. The method according to claim 3, characterized in that After step M2, the method further includes: Step M3, when 0.6P≤∑S i ≤0.9P, for each regulating hydrogen production station b j The remaining amount of hydrogen in the on-board PEM hydrogen production coupling device on that day is T j Arrange in descending order and record it as R k , that is, sort from large to small, k is 1, 2, 3, 4...n, and sort R in descending order k Sum the first c of c is an integer and satisfies 1≤c≤n, n1 is an integer, d is the first adjustment coefficient, and d is 1.5-2; the basic hydrogen production stations and the descending order R k The first c in the figure correspond to the on-board PEM hydrogen production coupling device in the regulating hydrogen production station being transported to the methanol production center.

5. The method according to claim 4, characterized in that After step M3, the method further includes: Step M4, ∑S i When the pressure is <0.6P, all the on-board PEM hydrogen production coupling devices in the basic hydrogen production station and the regulating hydrogen production station will be transported to the methanol production center.

6. The method according to claim 1, characterized in that The second preset distance is greater than the first preset distance, and the second preset distance is the first preset distance plus the adjustment distance.

7. The method according to claim 1, characterized in that The on-board PEM hydrogen production coupling device includes: a PEM hydrogen production device, a first power device, a second power device and a baffle, the first power device has a first power connection unit, and the second power device has a second power connection unit; the power generated by the new energy photovoltaic system or the wind turbine is converged to the power control cabinet, and the power of the power control cabinet is connected to the hydrogen production control switch cabinet, and the hydrogen production control switch cabinet provides power to the on-board PEM hydrogen production coupling device through the first power connection unit or the second power connection unit.

8. A device for preparing methanol by hydrogenating biomass raw materials, the device executing the method according to any one of claims 1 to 7, characterized in that: The volume ratio of each component of the mixed gas is CO:CO2:H2=9-13:8-15:70-80.

9. A device for preparing methanol by hydrogenating biomass raw materials, characterized in that: The temperature of the catalytic reaction is 160-360° C., the reaction pressure is 5-10 MPa, and the catalyst is zirconium oxide.

10. The device according to claim 9, characterized in that Computer control devices are installed in the methanol preparation center, the basic hydrogen production station and the regulating hydrogen production station, and the methanol preparation center is communicatively connected with the basic hydrogen production station and the regulating hydrogen production station.

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