Methanol filling and methanol hydrogen production filling integrated station

Abstract

The invention relates to the technical field of filling stations, in particular to a methanol filling and methanol hydrogen production filling integrated station. Comprising a methanol storage tank, a desalted water storage tank, a reforming reaction system, a hydrogen purification system, a hydrogen purity detector, a hydrogen storage system and a PLC (Programmable Logic Controller), an outlet of the reforming reaction system is sequentially communicated with a hydrogen purification system, a hydrogen purity detector and a hydrogen storage system through pipelines, the hydrogen purity detector and the two variable-frequency metering pumps are all electrically connected with the PLC, and the methanol storage tank is communicated with a methanol filling machine through a pipeline. A hydrogen storage tank of the hydrogen storage system is communicated with a hydrogen filling machine through a pipeline. According to the invention, methanol filling can be realized, and hydrogen can be prepared to meet the filling requirement of a hydrogen fuel automobile, so that the cost can be effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of refueling station technology, specifically to an integrated methanol refueling and methanol-to-hydrogen refueling station. Background Technology

[0002] With the rapid development of the new energy vehicle industry, hydrogen fuel cell vehicles are considered an important solution for future transportation due to their advantages such as zero emissions, long driving range, and fast refueling. However, hydrogen has a low density, and both high-pressure gaseous storage and transportation, as well as cryogenic liquid storage and transportation, are costly and pose certain safety risks. Setting up a single-function methanol-to-hydrogen station to produce and refuel hydrogen would require storing large amounts of methanol, but the number of hydrogen fuel cell electric vehicles is currently limited, resulting in low utilization and cost-effectiveness of methanol-to-hydrogen stations. For these reasons, neither transporting hydrogen nor setting up a single methanol-to-hydrogen station can achieve the required high efficiency and low cost. Therefore, there is an urgent need to design an integrated methanol refueling and methanol-to-hydrogen refueling station. Summary of the Invention

[0003] To address the problems existing in the prior art, this invention provides an integrated methanol refueling and methanol-to-hydrogen refueling station, and specifically discloses the following technical solutions: An integrated methanol refueling and methanol-to-hydrogen refueling station includes a methanol storage tank, a demineralized water storage tank, a reforming reaction system, a hydrogen purification system, a hydrogen purity detector, a hydrogen storage system, and a PLC controller. The methanol storage tank and the demineralized water storage tank are respectively connected to the inlet of the reforming reaction system via pipelines equipped with variable frequency metering pumps. The outlet of the reforming reaction system is sequentially connected to the hydrogen purification system, the hydrogen purity detector, and the hydrogen storage system via pipelines. The hydrogen purity detector and the two variable frequency metering pumps are electrically connected to the PLC controller. A methanol refueling machine is connected to the methanol storage tank via a pipeline, and a hydrogen refueling machine is connected to the hydrogen storage tank of the hydrogen storage system via a pipeline.

[0004] Furthermore, the reforming reaction system includes a heat exchanger, a gasification superheater, a thermal oil heater, and a reforming reactor group. The methanol storage tank and the demineralized water storage tank are respectively connected to the cold medium inlet of the heat exchanger through pipelines. The cold medium outlet of the heat exchanger is connected to the mixture inlet of the gasification superheater through a pipeline. The mixture outlet of the gasification superheater is connected to the inlet of the reforming reactor group through a pipeline. The outlet of the reforming reactor group is connected to the hot medium inlet of the heat exchanger through a pipeline. The hot medium outlet of the heat exchanger is connected to the hydrogen purification system. The thermal oil outlet of the thermal oil heater is connected to the thermal oil inlet of the gasification superheater through a pipeline with a circulation pump. The thermal oil inlet of the thermal oil heater is connected to the thermal oil outlet of the gasification superheater through a pipeline.

[0005] Furthermore, the reforming reactor group includes several reforming reactors connected in parallel via pipelines, and each reforming reactor has a solenoid valve installed on its inlet pipeline, and each solenoid valve is electrically connected to the PLC controller.

[0006] Furthermore, each of the reforming reactors is equipped with a temperature sensor, and the temperature sensor and the thermal oil heater are electrically connected to the PLC controller.

[0007] Furthermore, the hydrogen purification system includes a cooler, a gas-liquid separator, and a pressure swing adsorption (PSA) device. The inlet of the cooler is connected to the heat medium outlet of the heat exchanger via a pipeline, and the outlet of the cooler is connected to the gas-liquid separator and the PSA device in sequence via pipelines. The hydrogen outlet of the PSA device is connected to the hydrogen purity detector.

[0008] Furthermore, the liquid outlet of the gas-liquid separator is connected to the demineralized water storage tank via a pipeline.

[0009] Furthermore, the hydrogen storage system includes a buffer tank, a pressurizing pump, and a hydrogen storage tank. The inlet of the buffer tank is connected to the outlet of the hydrogen purity detector via a pipeline, and the outlet of the buffer tank is connected to the hydrogen storage tank via a pipeline with a pressurizing pump.

[0010] Furthermore, both the methanol storage tank and the demineralized water storage tank are equipped with level sensors to monitor the liquid levels in the methanol storage tank and the demineralized water storage tank in real time.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention employs a methanol storage tank, a demineralized water storage tank, a reforming reaction system, a hydrogen purification system, a hydrogen purity detector, a hydrogen storage system, and a PLC controller to form an integrated refueling station. The methanol storage tank is connected to a methanol refueling machine via pipeline, and the hydrogen storage tank of the hydrogen storage system is connected to a hydrogen refueling machine via pipeline. This not only enables methanol refueling but also produces hydrogen to meet the refueling needs of hydrogen fuel cell vehicles, thereby effectively reducing costs.

[0012] In this invention, the methanol storage tank and the demineralized water storage tank are respectively connected to the inlet of the reforming reaction system through pipelines equipped with variable frequency metering pumps. The hydrogen purity detector and the two variable frequency metering pumps are electrically connected to the PLC controller. The hydrogen purity detector can monitor the purity of the generated hydrogen in real time. When the purity does not meet the requirements, the PLC controller will control the two variable frequency metering pumps to adjust the ratio of methanol to demineralized water, thereby ensuring that the purity of the hydrogen meets the requirements. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0014] 1-Methanol dispenser, 2-Methanol storage tank, 3-Demineralized water storage tank, 4-Variable frequency metering pump, 5-Heat exchanger, 6-Gasification superheater, 7-Heat transfer oil heater, 8-Solenoid valve, 9-Reformer reactor, 10-Cooler, 11-Gas-liquid separator, 12-Pressure swing adsorption device, 13-Hydrogen purity detector, 14-Buffer tank, 15-Pressure pump, 16-Hydrogen storage tank, 17-Hydrogen dispenser, 18-Level sensor, 19-Temperature sensor, 20-Circulation pump. Detailed Implementation

[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0016] Reference Figure 1 A methanol refueling and methanol-to-hydrogen refueling integrated station includes a methanol storage tank 2, a demineralized water storage tank 3, a reforming reaction system, a hydrogen purification system, a hydrogen purity detector 13, a hydrogen storage system, and a PLC controller. The methanol storage tank 2 and the demineralized water storage tank 3 are connected to the inlet of the reforming reaction system via pipelines equipped with variable frequency metering pumps 4. The outlet of the reforming reaction system is connected sequentially to the hydrogen purification system, the hydrogen purity detector 13, and the hydrogen storage system via pipelines. The hydrogen purity detector 13 and the two variable frequency metering pumps 4 are electrically connected to the PLC controller. A methanol refueling machine 1 is connected to the methanol storage tank 2 via a pipeline, and a hydrogen refueling machine 17 is connected to the hydrogen storage tank 16 of the hydrogen storage system via a pipeline. This invention can refuel both methanol and hydrogen. Methanol and demineralized water are fed into the reforming reaction system in a certain proportion under the action of the variable frequency metering pump 4 to carry out the reforming reaction, thereby generating a mixed gas containing hydrogen. The mixed gas enters the hydrogen purification system to complete the purification, thereby obtaining hydrogen with higher purity. The purified hydrogen enters the hydrogen storage system for high-pressure storage to meet the refueling requirements of hydrogen fuel cell vehicles. The hydrogen purity detector 13 can monitor the purity of hydrogen in real time. When the purity does not meet the requirements, the PLC controller will control the two variable frequency metering pumps 4 to adjust the ratio of methanol to demineralized water, thereby ensuring that the purity of hydrogen meets the requirements.

[0017] In this embodiment, the methanol storage tank 2, the demineralized water storage tank 3, the reforming reaction system, the hydrogen purification system, the hydrogen purity detector 13, the hydrogen storage system, and the PLC controller are all integrated on the skid-mounted body, which facilitates assembly and relocation.

[0018] In this embodiment, the reforming reaction system includes a heat exchanger 5, a gasification superheater 6, a thermal oil heater 7, and a reforming reactor group. The methanol storage tank 2 and the demineralized water storage tank 3 are respectively connected to the cold medium inlet of the heat exchanger 5 through pipelines. The cold medium outlet of the heat exchanger 5 is connected to the mixture inlet of the gasification superheater 6 through a pipeline. The mixture outlet of the gasification superheater 6 is connected to the inlet of the reforming reactor group through a pipeline. The outlet of the reforming reactor group is connected to the hot medium inlet of the heat exchanger 5 through a pipeline. The hot medium outlet of the heat exchanger 5 is connected to the hydrogen purification system. The thermal oil outlet of the thermal oil heater 7 is connected to the thermal oil inlet of the gasification superheater 6 through a pipeline with a circulation pump 20. The thermal oil inlet of the thermal oil heater 7 is connected to the thermal oil outlet of the gasification superheater 6 through a pipeline. Methanol and demineralized water are mixed and then preheated in heat exchanger 5. After preheating, the mixture enters gasification superheater 6 and is converted into a mixture of methanol and water vapor. The high-temperature mixture then enters the reforming reactor group for a reforming reaction to produce hydrogen and carbon dioxide. The hydrogen and carbon dioxide are subsequently purified in a hydrogen purification system. In this embodiment, the waste heat from the hydrogen and carbon dioxide produced in the reforming reaction is used to preheat the methanol and demineralized water entering heat exchanger 5, thereby saving energy consumption.

[0019] In this embodiment, the reforming reactor group includes several reforming reactors 9 connected in parallel via pipelines. Each reforming reactor 9 has a solenoid valve 8 installed on its inlet pipeline, and each solenoid valve 8 is electrically connected to a PLC controller. By controlling the number of solenoid valves 8 opened by the PLC, the number of working reforming reactors 9 can be adjusted, thereby adjusting the hydrogen generation efficiency to meet different needs.

[0020] In this embodiment, each reforming reactor 9 is equipped with a temperature sensor 19, and both the temperature sensor 19 and the thermal oil heater 7 are electrically connected to the PLC controller. The temperature sensor 19 can monitor the temperature inside the reforming reactor in real time. When the temperature is too high or too low, the PLC controller can adjust the reaction temperature by adjusting the operating frequency of the thermal oil heater 7, thereby ensuring that the reaction temperature is maintained within a suitable range to improve the hydrogen production rate.

[0021] In this embodiment, the hydrogen purification system includes a cooler 10, a gas-liquid separator 11, and a pressure swing adsorption (PSA) device 12. The inlet of the cooler 10 is connected to the outlet of the heat medium of the heat exchanger 5 via a pipeline, and the outlet of the cooler 10 is connected to the gas-liquid separator 11 and the PSA device 12 in sequence via pipelines. The hydrogen outlet of the PSA device 12 is connected to a hydrogen purity detector 13. The hydrogen, carbon dioxide, and a small amount of water vapor generated by the reforming reaction first enter the cooler 10 for cooling, and then enter the gas-liquid separator 11 for gas-liquid separation. The separated hydrogen and carbon dioxide enter the PSA device 12 for purification, thereby obtaining purified hydrogen.

[0022] In this embodiment, the liquid outlet of the gas-liquid separator 11 is connected to the demineralized water storage tank 3 via a pipeline. The demineralized water separated by the gas-liquid separator 11 is discharged through the liquid outlet of the gas-liquid separator 11 and eventually enters the demineralized water storage tank 3 for recycling.

[0023] In this embodiment, the hydrogen storage system includes a buffer tank 14, a pressurizing pump 15, and a hydrogen storage tank 16. The inlet of the buffer tank 14 is connected to the outlet of the hydrogen purity detector 13 via a pipeline, and the outlet of the buffer tank 14 is connected to the hydrogen storage tank 16 via a pipeline connected to the pressurizing pump 15. The pressurizing pump 15 can pressurize the hydrogen in the buffer tank 14 and deliver it to the hydrogen storage tank 16 for high-pressure storage.

[0024] In this embodiment, both the methanol storage tank 2 and the demineralized water storage tank 3 are equipped with level sensors 18 to monitor the liquid levels in the methanol storage tank 2 and the demineralized water storage tank 3 in real time.

[0025] The above description is merely a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An integrated methanol refueling and methanol-to-hydrogen refueling station, characterized in that, The system includes a methanol storage tank, a demineralized water storage tank, a reforming reaction system, a hydrogen purification system, a hydrogen purity detector, a hydrogen storage system, and a PLC controller. The methanol storage tank and the demineralized water storage tank are connected to the inlet of the reforming reaction system via pipelines equipped with variable frequency metering pumps. The outlet of the reforming reaction system is connected in sequence via pipelines to the hydrogen purification system, the hydrogen purity detector, and the hydrogen storage system. The hydrogen purity detector and the two variable frequency metering pumps are electrically connected to the PLC controller. A methanol dispenser is connected to the methanol storage tank via a pipeline, and a hydrogen dispenser is connected to the hydrogen storage tank of the hydrogen storage system via a pipeline.

2. The integrated methanol refueling and methanol-to-hydrogen refueling station according to claim 1, characterized in that, The reforming reaction system includes a heat exchanger, a gasification superheater, a thermal oil heater, and a reforming reactor group. The methanol storage tank and the demineralized water storage tank are respectively connected to the cold medium inlet of the heat exchanger through pipelines. The cold medium outlet of the heat exchanger is connected to the mixture inlet of the gasification superheater through a pipeline. The mixture outlet of the gasification superheater is connected to the inlet of the reforming reactor group through a pipeline. The outlet of the reforming reactor group is connected to the hot medium inlet of the heat exchanger through a pipeline. The hot medium outlet of the heat exchanger is connected to the hydrogen purification system. The thermal oil outlet of the thermal oil heater is connected to the thermal oil inlet of the gasification superheater through a pipeline with a circulation pump. The thermal oil inlet of the thermal oil heater is connected to the thermal oil outlet of the gasification superheater through a pipeline.

3. The integrated methanol refueling and methanol-to-hydrogen refueling station according to claim 2, characterized in that, The reforming reactor group includes several reforming reactors connected in parallel via pipelines. Each reforming reactor has a solenoid valve installed on its inlet pipeline, and each solenoid valve is electrically connected to the PLC controller.

4. The integrated methanol refueling and methanol-to-hydrogen refueling station according to claim 3, characterized in that, Each of the reforming reactors is equipped with a temperature sensor, and the temperature sensor and the thermal oil heater are electrically connected to the PLC controller.

5. The integrated methanol refueling and methanol-to-hydrogen refueling station according to claim 2, characterized in that, The hydrogen purification system includes a cooler, a gas-liquid separator, and a pressure swing adsorption (PSA) device. The inlet of the cooler is connected to the heat medium outlet of the heat exchanger via a pipeline. The outlet of the cooler is connected to the gas-liquid separator and the PSA device in sequence via pipelines. The hydrogen outlet of the PSA device is connected to the hydrogen purity detector.

6. The integrated methanol refueling and methanol-to-hydrogen refueling station according to claim 5, characterized in that, The liquid outlet of the gas-liquid separator is connected to the demineralized water storage tank via a pipeline.

7. The integrated methanol refueling and methanol-to-hydrogen refueling station according to claim 1, characterized in that, The hydrogen storage system includes a buffer tank, a pressurizing pump, and a hydrogen storage tank. The inlet of the buffer tank is connected to the outlet of the hydrogen purity detector via a pipeline, and the outlet of the buffer tank is connected to the hydrogen storage tank via a pipeline with a pressurizing pump.

8. The integrated methanol refueling and methanol-to-hydrogen refueling station according to claim 1, characterized in that, Both the methanol storage tank and the demineralized water storage tank are equipped with level sensors to monitor the liquid levels in the methanol storage tank and the demineralized water storage tank in real time.

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