Methanol preparation system and method using comprehensive energy

Abstract

The invention provides a methanol preparation system and method utilizing comprehensive energy. The system comprises an off-grid green power supply subsystem, a hydrogen supply subsystem, a gasification subsystem, a power generation subsystem, a power supply center and a methanol synthesis subsystem, the off-grid green power supply subsystem is used for providing electric energy for the hydrogen supply subsystem and the power supply center; the hydrogen supply subsystem is used for providing hydrogen for the power generation subsystem and the methanol synthesis subsystem; the gasification subsystem is used for providing synthesis gas for the power generation subsystem and the methanol synthesis subsystem; the power generation subsystem is used for providing electric energy for the power supply center and providing heat energy for the methanol synthesis subsystem, the power supply center is used for integrating the electric energy and providing the integrated electric energy for the methanol synthesis subsystem and the gasification subsystem, and the methanol synthesis subsystem is used for providing methanol for the power generation subsystem. According to the scheme, a comprehensive energy methanol preparation system is formed by utilizing off-grid green electricity and biomass resources, and the economical efficiency and the stability of a methanol synthesis process can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of methanol preparation, and in particular to a methanol preparation system and method utilizing comprehensive energy. Background Art

[0002] In the field of methanol production, traditional production processes mostly rely on fossil energy, which not only consumes a large amount of resources such as coal and natural gas, but also produces a large amount of carbon dioxide and other pollutants, causing serious impacts on the environment. In addition, the energy consumption in the methanol production process is also high, which increases production costs. Therefore, in order to reduce dependence on fossil energy and reduce environmental pollution, it is particularly important to develop new methanol production technologies. Summary of the invention

[0003] In view of the defects in the prior art, the purpose of the present invention is to provide a methanol preparation system and method using comprehensive energy. By utilizing off-grid green electricity and biomass resources to form a comprehensive energy methanol preparation system, the economy and stability of the methanol synthesis process can be improved, environmental pollution can be reduced, and sustainable development can be promoted.

[0004] In order to solve the above technical problems, this application provides the following technical solutions:

[0005] According to a first aspect of an embodiment of the present application, there is provided a methanol production system utilizing comprehensive energy, including an off-grid green electricity supply subsystem, a hydrogen supply subsystem, a gasification subsystem, a power generation subsystem, a power supply center, and a methanol synthesis subsystem;

[0006] The off-grid green electricity supply subsystem is electrically connected to the hydrogen supply subsystem and the power supply center respectively, and is used to provide electrical energy to the hydrogen supply subsystem and the power supply center;

[0007] The hydrogen supply subsystem is connected to the power generation subsystem and the methanol synthesis subsystem respectively, and is used to provide hydrogen to the power generation subsystem and the methanol synthesis subsystem;

[0008] The gasification subsystem is connected to the power generation subsystem, the power supply center and the methanol synthesis subsystem respectively, and is used to provide synthesis gas for the power generation subsystem and the methanol synthesis subsystem; the synthesis gas is generated by biomass through a gasification process;

[0009] The power generation subsystem, the power supply center and the methanol synthesis subsystem are connected in pairs. The power generation subsystem is used to provide electrical energy to the power supply center and to provide thermal energy to the methanol synthesis subsystem. The power supply center is used to integrate electrical energy and provide the integrated electrical energy to the methanol synthesis subsystem and the gasification subsystem. The methanol synthesis subsystem is used to provide methanol to the power generation subsystem.

[0010] Furthermore, the hydrogen supply subsystem includes a hydrogen production device and a hydrogen storage device;

[0011] The off-grid green electricity supply subsystem is electrically connected to the hydrogen production equipment for providing electrical energy to the hydrogen production equipment. The hydrogen production equipment is connected to the hydrogen storage equipment for providing hydrogen to the hydrogen storage equipment. The hydrogen storage equipment is respectively connected to the methanol synthesis subsystem and the power generation subsystem for providing hydrogen to the methanol synthesis subsystem and the power generation subsystem.

[0012] Further, the gasification subsystem includes biomass collection equipment, gasification equipment and syngas storage equipment;

[0013] The biomass collection device is connected to the gasification device and is used to provide biomass for the gasification device. The gasification device is respectively connected to the power supply center, the methanol synthesis subsystem and the synthesis gas storage device, and is used to receive the electric energy provided by the power supply center to realize the operation of the gasification process, and is used to provide synthesis gas for the methanol synthesis subsystem and the synthesis gas storage device. The synthesis gas storage device is respectively connected to the power generation subsystem and the methanol synthesis subsystem, and is used to provide synthesis gas for the power generation subsystem and the methanol synthesis subsystem.

[0014] Furthermore, the off-grid green electricity supply subsystem includes off-grid green electricity and electricity storage equipment;

[0015] The off-grid green electricity is electrically connected to the hydrogen supply subsystem, the power supply center and the power storage device respectively, and is used to provide electrical energy to the hydrogen supply subsystem, the power supply center and the power storage device;

[0016] The power storage device is electrically connected to the power supply center and is used to provide electric energy to the power supply center.

[0017] Furthermore, the off-grid green electricity is off-grid wind / solar power generation.

[0018] Furthermore, the power generation subsystem adopts a gas turbine generator set.

[0019] According to a second aspect of an embodiment of the present application, a method for preparing methanol using comprehensive energy is provided, which is applied to any one of the above-mentioned systems for preparing methanol using comprehensive energy, comprising:

[0020] Acquire generated electric energy data corresponding to the electric energy generated by the off-grid green electricity supply subsystem;

[0021] Determine whether the generated electric energy data can simultaneously satisfy the normal operation of the hydrogen production process of the hydrogen supply subsystem, the gasification process of the gasification subsystem, and the methanol synthesis process of the methanol synthesis subsystem; the normal operation indicates that the operation index of the process within the preset time is within a preset range;

[0022] In the case where the generated power data cannot simultaneously satisfy the normal operation of the hydrogen production process of the hydrogen supply subsystem, the gasification process of the gasification subsystem, and the methanol synthesis process of the methanol synthesis subsystem, determining whether the generated power data can satisfy the normal operation of the methanol synthesis process of the methanol synthesis subsystem;

[0023] In the case where the generated power data cannot satisfy the normal operation of the methanol synthesis process of the methanol synthesis subsystem, determining whether the sum of the generated power data and the stored power data corresponding to the power stored in the off-grid green electricity supply subsystem can satisfy the normal operation of the methanol synthesis process of the methanol synthesis subsystem;

[0024] When the sum of the generated electric energy data and the stored electric energy data can satisfy the normal operation of the methanol synthesis process of the methanol synthesis subsystem, the electric energy generated and stored by the off-grid green electricity supply subsystem is provided to the power supply center, so that the power supply center integrates the electric energy and provides the integrated electric energy to the methanol synthesis subsystem, and when the electric energy provided by the power supply center exceeds the electric energy required by the methanol synthesis subsystem, the remaining electric energy is provided to the gasification subsystem, so that the gasification subsystem generates synthesis gas through the gasification process, and the hydrogen stored in the hydrogen supply subsystem and the synthesis gas generated and / or stored by the gasification subsystem are provided to the methanol synthesis subsystem, so that the methanol synthesis process can operate normally.

[0025] Furthermore, the method further comprises:

[0026] In the case where the sum of the generated electric energy data and the stored electric energy data cannot satisfy the normal operation of the methanol synthesis process of the methanol synthesis subsystem, it is determined whether the hydrogen stored in the hydrogen supply subsystem and the synthesis gas stored in the gasification subsystem can simultaneously satisfy the need to provide gas for the methanol synthesis subsystem and the power generation subsystem to achieve the normal operation of the methanol synthesis process;

[0027] In the case that the hydrogen stored in the hydrogen supply subsystem and the synthesis gas stored in the gasification subsystem can simultaneously provide gas for the methanol synthesis subsystem and the power generation subsystem, the electric energy generated and stored by the off-grid green electricity supply subsystem is provided to the power supply center, and the hydrogen stored in the hydrogen supply subsystem and / or the synthesis gas stored in the gasification subsystem is provided to the power generation subsystem, so that the power generation subsystem generates electric energy and provides the generated electric energy to the power supply center, so that the power supply center integrates the electric energy and provides the integrated electric energy to the methanol synthesis subsystem, and the hydrogen stored in the hydrogen supply subsystem and the synthesis gas stored in the gasification subsystem are provided to the methanol synthesis subsystem, and the power generation subsystem is used to provide thermal energy for the methanol synthesis subsystem, so that the methanol synthesis process of the methanol synthesis subsystem can operate normally.

[0028] Furthermore, the method further comprises:

[0029] In the case that the hydrogen stored in the hydrogen supply subsystem and the synthesis gas stored in the gasification subsystem cannot simultaneously meet the needs of providing gas for the methanol synthesis subsystem and the power generation subsystem, the electric energy generated and stored by the off-grid green electricity supply subsystem is provided to the power supply center, and the methanol synthesis subsystem is used to provide methanol for the power generation subsystem, so that the power generation subsystem generates electric energy and provides it to the power supply center, and then the power supply center integrates the electric energy and provides the integrated electric energy to the methanol synthesis subsystem, and the power generation subsystem provides thermal energy for the methanol synthesis subsystem, and the hydrogen stored in the hydrogen supply subsystem and the synthesis gas stored in the gasification subsystem are used to provide gas for the methanol synthesis subsystem, so that the methanol synthesis process of the methanol synthesis subsystem operates at minimum load conditions.

[0030] Furthermore, the method further comprises:

[0031] When the sum of the generated electric energy data and the stored electric energy data can simultaneously meet the normal operation of the gasification process of the gasification subsystem and the methanol synthesis process of the methanol synthesis subsystem, the electric energy generated and the stored electric energy of the off-grid green electricity supply subsystem are provided to the power supply center, so that the power supply center integrates the electric energy and provides the integrated electric energy to the methanol synthesis subsystem and the gasification subsystem, and provides the hydrogen stored in the hydrogen supply subsystem and the synthesis gas generated by the gasification subsystem to the methanol synthesis subsystem, so that the methanol synthesis process can operate normally.

[0032] Furthermore, the method further comprises:

[0033] In the case where the generated electric energy data can simultaneously satisfy the normal operation of the hydrogen production process of the hydrogen supply subsystem, the gasification process of the gasification subsystem and the methanol synthesis process of the methanol synthesis subsystem, the off-grid green electricity supply subsystem provides electric energy for the hydrogen supply subsystem, and provides electric energy for the gasification subsystem and the methanol synthesis subsystem through the power supply center, so that the hydrogen supply subsystem generates hydrogen through the hydrogen production process and the gasification subsystem generates synthesis gas through the gasification process and provides the synthesis gas to the methanol synthesis subsystem to realize the methanol synthesis process;

[0034] Determine whether there is redundant power;

[0035] In the presence of redundant electric energy, a portion of the redundant electric energy is stored in the off-grid green electricity supply subsystem, and another portion of the redundant electric energy is used to provide electric energy to the hydrogen supply subsystem and the gasification subsystem, so that the hydrogen supply subsystem and the gasification subsystem can produce gas for storage.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] The methanol preparation system using comprehensive energy provided by the present invention forms a comprehensive energy methanol preparation system by using off-grid green electricity and biomass resources, so that even in remote areas or areas with underdeveloped power grids, it can provide stable clean energy for the methanol synthesis process, reduce carbon emissions, accelerate carbon circulation, improve energy utilization efficiency, optimize energy structure and energy storage and power regulation, reduce production costs and environmental pollution, achieve improved economy and stability of the methanol synthesis process, and promote sustainable development; at the same time, the power generation subsystem is also used to provide thermal energy for the methanol synthesis subsystem, so that it is applied to the methanol synthesis process, further improving the utilization rate of energy and achieving efficient operation of the process; in addition, the system avoids the shutdown of the methanol synthesis process by integrating the off-grid green electricity supply subsystem, the hydrogen supply subsystem and the power generation subsystem, and effectively avoids problems such as affecting production efficiency, damaging equipment life, increasing production costs and bringing safety hazards.

[0038] The present invention also provides a method for preparing methanol using comprehensive energy. The method for preparing methanol using comprehensive energy is applied to the above-mentioned methanol preparation system using comprehensive energy. Since the method for preparing methanol using comprehensive energy includes the technical solution of the above-mentioned methanol preparation system using comprehensive energy, it has corresponding technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0040] Figure 1A schematic structural diagram of a methanol preparation system utilizing comprehensive energy provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0042] Embodiment 1:

[0043] See also Figure 1 , a methanol production system using comprehensive energy provided in an embodiment of the present application includes an off-grid green electricity supply subsystem, a hydrogen supply subsystem, a gasification subsystem, a power generation subsystem, a power supply center and a methanol synthesis subsystem;

[0044] The off-grid green electricity supply subsystem is electrically connected to the hydrogen supply subsystem and the power supply center respectively, and is used to provide electric energy to the hydrogen supply subsystem and the power supply center;

[0045] The hydrogen supply subsystem is connected to the power generation subsystem and the methanol synthesis subsystem respectively, and is used to provide hydrogen to the power generation subsystem and the methanol synthesis subsystem;

[0046] The gasification subsystem is connected to the power generation subsystem, the power supply center and the methanol synthesis subsystem respectively, and is used to provide synthesis gas for the power generation subsystem and the methanol synthesis subsystem; the synthesis gas is produced by the gasification process of biomass;

[0047] The power generation subsystem, the power supply center and the methanol synthesis subsystem are connected in pairs. The power generation subsystem is used to provide electrical energy to the power supply center and to provide thermal energy to the methanol synthesis subsystem. The power supply center is used to integrate electrical energy and provide the integrated electrical energy to the methanol synthesis subsystem and the gasification subsystem. The methanol synthesis subsystem is used to provide methanol to the power generation subsystem.

[0048] In a specific embodiment, the off-grid green electricity supply subsystem includes off-grid green electricity and power storage equipment; the off-grid green electricity is electrically connected to the hydrogen supply subsystem, the power supply center and the power storage equipment respectively, and is used to provide electric energy to the hydrogen supply subsystem, the power supply center and the power storage equipment; the power storage equipment is electrically connected to the power supply center, and is used to provide electric energy to the power supply center; wherein the off-grid green electricity is off-grid wind / solar power generation, that is, the off-grid green electricity adopts off-grid wind power generation or off-grid solar power generation, and the power storage equipment can adopt battery energy storage;

[0049] The hydrogen supply subsystem includes hydrogen production equipment and hydrogen storage equipment;

[0050] The off-grid green electricity supply subsystem is electrically connected to the hydrogen production equipment to provide electric energy to the hydrogen production equipment. The hydrogen production equipment is connected to the hydrogen storage equipment to provide hydrogen to the hydrogen storage equipment. The hydrogen storage equipment is respectively connected to the methanol synthesis subsystem and the power generation subsystem to provide hydrogen to the methanol synthesis subsystem and the power generation subsystem. The electric energy source of the hydrogen production equipment is off-grid green electricity, and it produces hydrogen by electrolyzing water.

[0051] The gasification subsystem includes biomass collection equipment, gasification equipment and synthesis gas storage equipment; the biomass collection equipment is connected to the gasification equipment to provide biomass for the gasification equipment, the gasification equipment is respectively connected to the power supply center, the methanol synthesis subsystem and the synthesis gas storage equipment to receive the electric energy provided by the power supply center to realize the operation of the gasification process, and to provide synthesis gas for the methanol synthesis subsystem and the synthesis gas storage equipment, the synthesis gas storage equipment is respectively connected to the power generation subsystem and the methanol synthesis subsystem to provide synthesis gas for the power generation subsystem and the methanol synthesis subsystem; wherein the main components of the synthesis gas include CO, H2, CH4, CO2, N2, etc.;

[0052] The power generation subsystem uses a gas turbine generator set;

[0053] The power supply center is used to integrate the electric energy provided by off-grid green electricity, power storage equipment, and power generation subsystems, and provide the integrated electric energy to the methanol synthesis subsystem so that the methanol synthesis subsystem can obtain a stable power supply; and, when there is sufficient electric energy, the power supply center can also provide the integrated electric energy to the gasification subsystem so that the gasification subsystem can obtain power supply to realize the operation of the gasification process.

[0054] In a specific implementation scenario, the structure of the system is as follows Figure 1 As shown, the specific operating principle is as follows:

[0055] 1. Off-grid wind and solar power generation, including ① for water electrolysis to produce hydrogen; ② for direct power supply to the power supply center; ③ for battery energy storage (short-term energy storage);

[0056] 2. Biomass undergoes gasification to produce synthesis gas (main components CO, H2, CH4, CO2, N2, etc.); synthesis gas and hydrogen are used to produce methanol using the synthetic methanol process;

[0057] 3. The methanol synthesis process requires stable electricity, and the power supply center is used to provide stable power supply; typical situation:

[0058] 1) When the electricity generated by wind / solar power generation is sufficient and exceeds the requirements of the above-mentioned process devices: that is, when the electrolysis of water to produce hydrogen, gasification process, methanol synthesis process and other processes are operating normally, the excess wind / solar power generation energy is stored in batteries and hydrogen and synthesis gas are stored;

[0059] 2) When the electricity generated by wind / solar power generation cannot simultaneously meet the normal operation of water electrolysis hydrogen production, gasification process, methanol synthesis process, etc., battery energy storage can be used to supplement electricity. The power supply center can provide stable electricity to the gasification process and methanol synthesis process, and use the stored hydrogen to ensure the normal operation of the methanol synthesis process;

[0060] 3) When the electricity generated by wind / solar power generation cannot simultaneously meet the normal operation of water electrolysis hydrogen production, gasification process, methanol synthesis process, etc., the battery energy storage is first used to supplement the electricity, and then the stored hydrogen or synthesis gas is burned by the gas turbine unit to generate electricity, ensuring that the power supply center can provide stable electricity to the methanol synthesis process, and use the stored hydrogen and synthesis gas to enable the normal operation of the methanol synthesis process;

[0061] At the same time, the exhaust waste heat of the gas turbine generator set can also be used in the methanol synthesis process to improve energy utilization;

[0062] 4) When the electricity generated by wind / solar power generation cannot simultaneously meet the normal operation of water electrolysis hydrogen production, gasification process, methanol synthesis process, etc., the gas turbine unit is used to burn methanol to generate electricity, and the stored hydrogen and synthesis gas are used to maintain the methanol synthesis process at the minimum load condition to avoid process shutdown;

[0063] The power supply center serves as an electricity integration center, providing the gasification process and methanol synthesis process with stable required electricity.

[0064] In this embodiment, the system is designed to operate off-grid using wind / solar power generation, supplemented by battery energy storage and hydrogen / synthesis gas / methanol fuel to generate electricity for the gas turbine generator set, which can provide more stable electricity and make the overall process more economical and efficient.

[0065] Embodiment 2:

[0066] The present application also provides a method for preparing methanol using comprehensive energy, including:

[0067] Obtaining generated power data corresponding to the power generated by the off-grid green power supply subsystem;

[0068] Determine whether the generated electric energy data can simultaneously meet the normal operation of the hydrogen production process of the hydrogen supply subsystem, the gasification process of the gasification subsystem, and the methanol synthesis process of the methanol synthesis subsystem; normal operation indicates that the operating indicators of the process within the preset time are within the preset range;

[0069] In the case where the generated power data cannot simultaneously satisfy the normal operation of the hydrogen production process of the hydrogen supply subsystem, the gasification process of the gasification subsystem and the methanol synthesis process of the methanol synthesis subsystem, it is determined whether the generated power data can satisfy the normal operation of the methanol synthesis process of the methanol synthesis subsystem;

[0070] In the case where the generated power data cannot satisfy the normal operation of the methanol synthesis process of the methanol synthesis subsystem, it is determined whether the sum of the generated power data and the stored power data corresponding to the power stored in the off-grid green power supply subsystem can satisfy the normal operation of the methanol synthesis process of the methanol synthesis subsystem;

[0071] When the sum of the generated electricity data and the stored electricity data can meet the normal operation of the methanol synthesis process of the methanol synthesis subsystem, the electricity generated and stored by the off-grid green electricity supply subsystem is provided to the power supply center, so that the power supply center integrates the electricity and provides the integrated electricity to the methanol synthesis subsystem, and when the electricity provided by the power supply center exceeds the electricity required by the methanol synthesis subsystem, the remaining electricity is provided to the gasification subsystem, so that the gasification subsystem produces synthesis gas through the gasification process, and the hydrogen stored in the hydrogen supply subsystem and the synthesis gas produced and / or stored by the gasification subsystem are provided to the methanol synthesis subsystem, so that the methanol synthesis process can operate normally.

[0072] In an optional embodiment, the method further includes:

[0073] In the case where the sum of the generated power data and the stored power data cannot satisfy the normal operation of the methanol synthesis process of the methanol synthesis subsystem, it is determined whether the hydrogen stored in the hydrogen supply subsystem and the synthesis gas stored in the gasification subsystem can simultaneously satisfy the supply of gas to the methanol synthesis subsystem and the power generation subsystem to achieve the normal operation of the methanol synthesis process;

[0074] When the hydrogen stored in the hydrogen supply subsystem and the synthesis gas stored in the gasification subsystem can simultaneously provide gas for the methanol synthesis subsystem and the power generation subsystem, the electric energy generated and stored in the off-grid green power supply subsystem is provided to the power supply center, and the hydrogen stored in the hydrogen supply subsystem and / or the synthesis gas stored in the gasification subsystem is provided to the power generation subsystem, so that the power generation subsystem generates electric energy and provides the generated electric energy to the power supply center, so that the power supply center integrates the electric energy and provides the integrated electric energy to the methanol synthesis subsystem, and the hydrogen stored in the hydrogen supply subsystem and the synthesis gas stored in the gasification subsystem are provided to the methanol synthesis subsystem, and the power generation subsystem is used to provide heat energy for the methanol synthesis subsystem, so that the methanol synthesis process of the methanol synthesis subsystem can operate normally.

[0075] In an optional embodiment, the method further includes:

[0076] When the hydrogen stored in the hydrogen supply subsystem and the synthesis gas stored in the gasification subsystem cannot simultaneously provide gas for the methanol synthesis subsystem and the power generation subsystem, the electric energy generated and stored in the off-grid green power supply subsystem is provided to the power supply center, and the methanol synthesis subsystem is used to provide methanol for the power generation subsystem, so that the power generation subsystem generates electric energy and provides it to the power supply center, and then the power supply center integrates the electric energy and provides the integrated electric energy to the methanol synthesis subsystem, and the power generation subsystem provides thermal energy to the methanol synthesis subsystem, and the hydrogen stored in the hydrogen supply subsystem and the synthesis gas stored in the gasification subsystem are used to provide gas for the methanol synthesis subsystem, so that the methanol synthesis process of the methanol synthesis subsystem operates at minimum load conditions.

[0077] In an optional embodiment, the method further includes:

[0078] Under the condition that the generated power data can satisfy the normal operation of the methanol synthesis process of the methanol synthesis subsystem, it is determined whether the sum of the generated power data and the stored power data can satisfy the normal operation of the gasification process of the gasification subsystem and the methanol synthesis process of the methanol synthesis subsystem at the same time;

[0079] When the sum of the generated electricity data and the stored electricity data can simultaneously meet the normal operation of the gasification process of the gasification subsystem and the methanol synthesis process of the methanol synthesis subsystem, the electricity generated and stored by the off-grid green electricity supply subsystem are provided to the power supply center, so that the power supply center integrates the electricity and provides the integrated electricity to the methanol synthesis subsystem and the gasification subsystem, and the hydrogen stored in the hydrogen supply subsystem and the synthesis gas generated by the gasification subsystem are provided to the methanol synthesis subsystem, so that the methanol synthesis process can operate normally.

[0080] In an optional embodiment, the method further includes:

[0081] When the sum of the generated electricity data and the stored electricity data cannot simultaneously meet the normal operation of the gasification process of the gasification subsystem and the methanol synthesis process of the methanol synthesis subsystem, the electricity generated and stored by the off-grid green electricity supply subsystem shall be provided to the power supply center, so that the power supply center can integrate the electricity and provide the integrated electricity to the methanol synthesis subsystem first, and provide the remaining electricity to the gasification subsystem when the electricity demand of the methanol synthesis subsystem is met, so that the gasification subsystem produces synthesis gas, and the hydrogen stored in the hydrogen supply subsystem and the synthesis gas produced and stored in the gasification subsystem shall be provided to the methanol synthesis subsystem, so that the methanol synthesis process can operate normally.

[0082] In an optional embodiment, the method further includes:

[0083] Under the condition that the generated electric energy data can simultaneously meet the normal operation of the hydrogen production process of the hydrogen supply subsystem, the gasification process of the gasification subsystem and the methanol synthesis process of the methanol synthesis subsystem, the off-grid green electricity supply subsystem provides electric energy for the hydrogen supply subsystem, and provides electric energy for the gasification subsystem and the methanol synthesis subsystem through the power supply center, so that the hydrogen supply subsystem generates hydrogen through the hydrogen production process and the gasification subsystem generates synthesis gas through the gasification process and provides it to the methanol synthesis subsystem to realize the methanol synthesis process;

[0084] Determine whether there is redundant power;

[0085] In the presence of redundant electric energy, a portion of the redundant electric energy is stored in the off-grid green electricity supply subsystem, while another portion of the redundant electric energy is used to provide electric energy for the hydrogen supply subsystem and the gasification subsystem, so that the hydrogen supply subsystem and the gasification subsystem can generate gas for storage.

[0086] It should be noted that the above method embodiment and the system embodiment described in Example 1 belong to the same concept and correspond to each other. Therefore, the implementation method in Example 1 is also applicable to this embodiment and will not be repeated here.

[0087] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A methanol production system using comprehensive energy, characterized in that: It includes off-grid green electricity supply subsystem, hydrogen supply subsystem, gasification subsystem, power generation subsystem, power supply center and methanol synthesis subsystem; The off-grid green electricity supply subsystem is electrically connected to the hydrogen supply subsystem and the power supply center respectively, and is used to provide electrical energy to the hydrogen supply subsystem and the power supply center; The hydrogen supply subsystem is connected to the power generation subsystem and the methanol synthesis subsystem respectively, and is used to provide hydrogen to the power generation subsystem and the methanol synthesis subsystem; The gasification subsystem is respectively connected to the power generation subsystem, the power supply center and the methanol synthesis subsystem, and is used to provide synthesis gas for the power generation subsystem and the methanol synthesis subsystem; The synthesis gas is produced by a gasification process of biomass; The power generation subsystem, the power supply center and the methanol synthesis subsystem are connected in pairs. The power generation subsystem is used to provide electrical energy to the power supply center and to provide thermal energy to the methanol synthesis subsystem. The power supply center is used to integrate electrical energy and provide the integrated electrical energy to the methanol synthesis subsystem and the gasification subsystem. The methanol synthesis subsystem is used to provide methanol to the power generation subsystem.

2. The methanol production system using comprehensive energy according to claim 1, characterized in that: The hydrogen supply subsystem includes hydrogen production equipment and hydrogen storage equipment; The off-grid green electricity supply subsystem is electrically connected to the hydrogen production equipment for providing electrical energy to the hydrogen production equipment. The hydrogen production equipment is connected to the hydrogen storage equipment for providing hydrogen to the hydrogen storage equipment. The hydrogen storage equipment is respectively connected to the methanol synthesis subsystem and the power generation subsystem for providing hydrogen to the methanol synthesis subsystem and the power generation subsystem.

3. The methanol production system using comprehensive energy according to claim 1, characterized in that: The gasification subsystem includes biomass collection equipment, gasification equipment and synthesis gas storage equipment; The biomass collection device is connected to the gasification device and is used to provide biomass for the gasification device. The gasification device is respectively connected to the power supply center, the methanol synthesis subsystem and the synthesis gas storage device, and is used to receive the electric energy provided by the power supply center to realize the operation of the gasification process, and is used to provide synthesis gas for the methanol synthesis subsystem and the synthesis gas storage device. The synthesis gas storage device is respectively connected to the power generation subsystem and the methanol synthesis subsystem, and is used to provide synthesis gas for the power generation subsystem and the methanol synthesis subsystem.

4. The methanol production system using comprehensive energy according to any one of claims 1 to 3, characterized in that: The off-grid green electricity supply subsystem includes off-grid green electricity and electricity storage equipment; The off-grid green electricity is electrically connected to the hydrogen supply subsystem, the power supply center and the power storage device respectively, and is used to provide electrical energy to the hydrogen supply subsystem, the power supply center and the power storage device; The power storage device is electrically connected to the power supply center and is used to provide electric energy to the power supply center.

5. The methanol production system using comprehensive energy according to claim 4, characterized in that: The off-grid green electricity is off-grid wind / solar power generation.

6. A method for preparing methanol using comprehensive energy, applied to the methanol preparation system using comprehensive energy as claimed in any one of claims 1 to 5, characterized in that: include: Acquire generated electric energy data corresponding to the electric energy generated by the off-grid green electricity supply subsystem; Determine whether the generated electric energy data can simultaneously satisfy the normal operation of the hydrogen production process of the hydrogen supply subsystem, the gasification process of the gasification subsystem, and the methanol synthesis process of the methanol synthesis subsystem; the normal operation indicates that the operation index of the process within the preset time is within a preset range; In the case where the generated power data cannot simultaneously satisfy the normal operation of the hydrogen production process of the hydrogen supply subsystem, the gasification process of the gasification subsystem, and the methanol synthesis process of the methanol synthesis subsystem, determining whether the generated power data can satisfy the normal operation of the methanol synthesis process of the methanol synthesis subsystem; In the case where the generated power data cannot satisfy the normal operation of the methanol synthesis process of the methanol synthesis subsystem, determining whether the sum of the generated power data and the stored power data corresponding to the power stored in the off-grid green electricity supply subsystem can satisfy the normal operation of the methanol synthesis process of the methanol synthesis subsystem; When the sum of the generated electric energy data and the stored electric energy data can satisfy the normal operation of the methanol synthesis process of the methanol synthesis subsystem, the electric energy generated and stored by the off-grid green electricity supply subsystem is provided to the power supply center, so that the power supply center integrates the electric energy and provides the integrated electric energy to the methanol synthesis subsystem, and when the electric energy provided by the power supply center exceeds the electric energy required by the methanol synthesis subsystem, the remaining electric energy is provided to the gasification subsystem, so that the gasification subsystem generates synthesis gas through the gasification process, and the hydrogen stored in the hydrogen supply subsystem and the synthesis gas generated and / or stored by the gasification subsystem are provided to the methanol synthesis subsystem, so that the methanol synthesis process can operate normally.

7. The method for preparing methanol using comprehensive energy according to claim 6, characterized in that: Also includes: In the case where the sum of the generated electric energy data and the stored electric energy data cannot satisfy the normal operation of the methanol synthesis process of the methanol synthesis subsystem, it is determined whether the hydrogen stored in the hydrogen supply subsystem and the synthesis gas stored in the gasification subsystem can simultaneously satisfy the need to provide gas for the methanol synthesis subsystem and the power generation subsystem to achieve the normal operation of the methanol synthesis process; In the case that the hydrogen stored in the hydrogen supply subsystem and the synthesis gas stored in the gasification subsystem can simultaneously provide gas for the methanol synthesis subsystem and the power generation subsystem, the electric energy generated and stored by the off-grid green electricity supply subsystem is provided to the power supply center, and the hydrogen stored in the hydrogen supply subsystem and / or the synthesis gas stored in the gasification subsystem is provided to the power generation subsystem, so that the power generation subsystem generates electric energy and provides the generated electric energy to the power supply center, so that the power supply center integrates the electric energy and provides the integrated electric energy to the methanol synthesis subsystem, and the hydrogen stored in the hydrogen supply subsystem and the synthesis gas stored in the gasification subsystem are provided to the methanol synthesis subsystem, and the power generation subsystem is used to provide thermal energy for the methanol synthesis subsystem, so that the methanol synthesis process of the methanol synthesis subsystem can operate normally.

8. The method for preparing methanol using comprehensive energy according to claim 7, characterized in that: Also includes: In the case that the hydrogen stored in the hydrogen supply subsystem and the synthesis gas stored in the gasification subsystem cannot simultaneously meet the needs of providing gas for the methanol synthesis subsystem and the power generation subsystem, the electric energy generated and stored by the off-grid green electricity supply subsystem is provided to the power supply center, and the methanol synthesis subsystem is used to provide methanol for the power generation subsystem, so that the power generation subsystem generates electric energy and provides it to the power supply center, and then the power supply center integrates the electric energy and provides the integrated electric energy to the methanol synthesis subsystem, and the power generation subsystem provides thermal energy for the methanol synthesis subsystem, and the hydrogen stored in the hydrogen supply subsystem and the synthesis gas stored in the gasification subsystem are used to provide gas for the methanol synthesis subsystem, so that the methanol synthesis process of the methanol synthesis subsystem operates at minimum load conditions.

9. The method for preparing methanol using comprehensive energy according to claim 6, characterized in that: Also includes: In the case where the generated power data can satisfy the normal operation of the methanol synthesis process of the methanol synthesis subsystem, determining whether the sum of the generated power data and the stored power data can simultaneously satisfy the normal operation of the gasification process of the gasification subsystem and the methanol synthesis process of the methanol synthesis subsystem; When the sum of the generated electric energy data and the stored electric energy data can simultaneously meet the normal operation of the gasification process of the gasification subsystem and the methanol synthesis process of the methanol synthesis subsystem, the electric energy generated and the stored electric energy of the off-grid green electricity supply subsystem are provided to the power supply center, so that the power supply center integrates the electric energy and provides the integrated electric energy to the methanol synthesis subsystem and the gasification subsystem, and provides the hydrogen stored in the hydrogen supply subsystem and the synthesis gas generated by the gasification subsystem to the methanol synthesis subsystem, so that the methanol synthesis process can operate normally.

10. The method for preparing methanol using comprehensive energy according to any one of claims 6 to 9, characterized in that: Also includes: In the case where the generated electric energy data can simultaneously satisfy the normal operation of the hydrogen production process of the hydrogen supply subsystem, the gasification process of the gasification subsystem and the methanol synthesis process of the methanol synthesis subsystem, the off-grid green electricity supply subsystem provides electric energy for the hydrogen supply subsystem, and provides electric energy for the gasification subsystem and the methanol synthesis subsystem through the power supply center, so that the hydrogen supply subsystem generates hydrogen through the hydrogen production process and the gasification subsystem generates synthesis gas through the gasification process and provides the synthesis gas to the methanol synthesis subsystem to realize the methanol synthesis process; Determine whether there is redundant power; In the presence of redundant electric energy, a portion of the redundant electric energy is stored in the off-grid green electricity supply subsystem, and another portion of the redundant electric energy is used to provide electric energy to the hydrogen supply subsystem and the gasification subsystem, so that the hydrogen supply subsystem and the gasification subsystem can produce gas for storage.

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