Fixed type mother-child hydrogen refueling station filling system for refinery enterprise pipeline hydrogen supply

Abstract

The utility model discloses a fixed mother-son hydrogen refueling station filling system for pipeline hydrogen supply of a refinery enterprise. The fixed mother-son hydrogen refueling station filling system comprises a hydrogen production device of the refinery enterprise, an outlet of the hydrogen production device is connected with a first-stage compression inlet of the third-stage compressor through a pipeline, and a third-stage compression outlet of the third-stage compressor is connected with an inlet of the hydrogen adding machine through a pipeline; a third-stage compression outlet of the third-stage compressor is further connected with the hydrogen filling column through a pipeline; a second-stage compression inlet of the third-stage compressor is connected with an outlet of the standby unloading column through a pipeline, and an inlet of the standby unloading column is connected with an outlet of the standby long pipe trailer through a pipeline. According to the utility model, a first hydrogen storage cylinder group and a second hydrogen storage cylinder group are omitted, so that the equipment investment is saved, and a hydrogen production device of a refinery enterprise at a pipeline hydrogen source is used as a hydrogen storage system of the fixed type mother-child hydrogen refueling station; due to the fact that the second hydrogen storage bottle set is omitted, a sequential control cabinet system for conducting pressurization and pressure release control on the second hydrogen storage bottle set is omitted, and investment of automatic control facilities is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydrogenation stations, and in particular relates to a fixed mother-child hydrogenation station filling system for pipeline hydrogen supply in a refinery enterprise. Background Art

[0002] Fixed mother-child hydrogen refueling stations can not only refuel fuel cell vehicles with hydrogen, but also refuel and charge long-tube trailers.

[0003] According to the actual needs of petrochemical enterprises to build fixed mother-child hydrogenation stations with pipeline hydrogen supply, the in-station filling and charging processes of 35MPa pressure level hydrogenation stations and 20MPa pressure level hydrogenation mother stations with fixed pipeline hydrogen supply are as follows: Figure 1 As shown, the hydrogen inlet pressure is 1.8-2.0MPa, and the pipeline hydrogen is compressed by the first compressor and the second compressor in turn before entering the hydrogen filling machine for hydrogen filling of fuel cell vehicles. The outlet of the first compressor is connected to the hydrogen filling column by a pipeline for filling and charging of the long tube trailer. The outlet of the spare long tube trailer is connected to the inlet of the second compressor by a pipeline through the spare unloading column. The first hydrogen storage bottle group is connected to the pipeline between the outlet of the first compressor and the inlet of the second compressor, and the second hydrogen storage bottle group is connected to the pipeline between the outlet of the second compressor and the hydrogen filling machine. The first compressor and the second compressor can both perform two-stage compression and are equipped with their own chillers. The design pressure of the first compressor is 20MPa, and the design pressure of the second compressor is 45Mpa. The hydrogen storage pressure of the first hydrogen storage bottle group is 20MPa, and the hydrogen storage pressure of the second hydrogen storage bottle group is 45MPa and is equipped with a sequential control cabinet system for controlling charging and depressurization. At the same time, the hydrogen filling machine is equipped with a hydrogen filling machine chiller and a heat exchanger.

[0004] In the above process, a first hydrogen storage bottle group with a hydrogen storage pressure of 20MPa and a second hydrogen storage bottle group with a hydrogen storage pressure of 45MPa are used to store hydrogen and increase the speed of hydrogen refueling. However, the use of hydrogen storage bottle groups will increase equipment investment. At the same time, the second hydrogen storage bottle group is also equipped with a sequential control cabinet system for controlling charging and depressurization, which further increases the investment in automatic control facilities. Utility Model Content

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and to provide a fixed mother-child hydrogen filling station filling system for pipeline hydrogen supply in a refinery enterprise.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A fixed mother-child hydrogen filling station filling system for pipeline hydrogen supply of a refinery enterprise, comprising a hydrogen production device of the refinery enterprise;

[0008] The outlet of the hydrogen production device is connected to the first compression inlet of the three-stage compressor by a pipeline, and the third compression outlet of the three-stage compressor is connected to the inlet of the hydrogenation machine by a pipeline;

[0009] The third-stage compression outlet of the three-stage compressor is also connected to the hydrogen filling column by pipeline;

[0010] The secondary compression inlet of the three-stage compressor is connected to the outlet of the spare unloading column through a pipeline, and the inlet of the spare unloading column is connected to the outlet of the spare long tube trailer through a pipeline.

[0011] Preferably, the design pressure of the three-stage compressor is 35 MPa.

[0012] Preferably, the three-stage compressor is a liquid-driven gas compressor.

[0013] Preferably, a first valve is provided on the pipeline between the third-stage compression outlet of the three-stage compressor and the hydrogenation machine inlet.

[0014] Preferably, a second valve and a third valve are sequentially arranged on the pipeline between the third-stage compression outlet of the three-stage compressor and the hydrogen filling column according to the medium flow direction.

[0015] Preferably, the pipeline between the second valve and the third valve is connected to a safety relief system.

[0016] Preferably, a pressure sensor for monitoring the pressure in front of the third valve is arranged on the pipeline between the second valve and the third valve.

[0017] Preferably, the three-stage compressor is connected to the chiller via a cooling circuit.

[0018] Preferably, the chiller comprises a first cooler, a second cooler, and a third cooler;

[0019] The first-stage compression outlet of the three-stage compressor is connected to the inlet of the first cooler, the outlet of the first cooler is connected to the second-stage compression inlet of the three-stage compressor, the second-stage compression outlet of the three-stage compressor is connected to the inlet of the second cooler, the outlet of the second cooler is connected to the third-stage compression inlet of the three-stage compressor, the third-stage compression outlet of the three-stage compressor is connected to the inlet of the third cooler, and the outlet of the third cooler is connected to the pipeline connecting the hydrogenator and the hydrogen filling column.

[0020] The beneficial effects of the utility model are:

[0021] (1) In the present invention, the first hydrogen storage bottle group with a hydrogen storage pressure of 20MPa and the second hydrogen storage bottle group with a hydrogen storage pressure of 45MPa are eliminated, thereby saving equipment investment and using the hydrogen production device of the refinery at the source of pipeline hydrogen as the hydrogen storage system of the fixed mother-child hydrogen refueling station; since the second hydrogen storage bottle group with a hydrogen storage pressure of 45MPa is eliminated, the sequential control cabinet system for controlling the pressure charging and pressure release thereof is also eliminated, saving investment in automatic control facilities.

[0022] (2) The design pressure of the three-stage compressor in the utility model is 35Mpa. A second hydrogen storage bottle group with a hydrogen storage pressure of 45MPa is provided in the existing filling process for the purpose of storing hydrogen and increasing the speed of hydrogenation. The present application uses the hydrogen production device of the refinery at the source of pipeline hydrogen as the hydrogen storage system of the fixed mother-child hydrogenation station. After canceling the second hydrogen storage bottle group with a hydrogen storage pressure of 45MPa, the compressor outlet pressure no longer needs to be 45MPa, and only needs to reach the design pressure of 35MPa of the on-board hydrogen storage bottle when filling the fuel cell vehicle.

[0023] (3) In the present invention, the first compressor of the secondary compression and the second compressor of the secondary compression are eliminated and optimized into a 35MPa liquid-driven compressor of the third-stage compression, thereby reducing the comprehensive equipment investment and energy consumption of the fixed mother-child hydrogenation station; the connecting pipelines of the spare long tube trailer and the spare unloading column that need to be activated when the hydrogen production device or the pipeline between the hydrogen production device and the third-stage compressor are shut down are connected to the secondary compression inlet of the third-stage compressor, which can also ensure the normal operation of the hydrogenation station in the event of a temporary interruption of the hydrogen production device or the pipeline between the hydrogen production device and the third-stage compressor of the refinery.

[0024] (4) The utility model eliminates the water chiller and heat exchanger of the hydrogen filling machine, simplifies the process, saves equipment investment, and reduces operating energy consumption; the existing hydrogen filling machine is equipped with a water chiller and a heat exchanger for the purpose of preventing the Joule-Thomson effect from occurring during the hydrogen pressure increase process when hydrogen is filled into a fuel cell vehicle, causing the on-board hydrogen storage bottle of the fuel cell vehicle to exceed the safe allowable temperature of 85°C; however, after the second hydrogen storage bottle group with a hydrogen storage pressure of 45MPa is eliminated in the present application, the pressure of hydrogen filled into the on-board hydrogen storage bottle of the fuel cell vehicle has been reduced from a maximum of 45MPa to a maximum of 35MPa. When hydrogen is filled into the on-board hydrogen storage bottle of the fuel cell vehicle under the maximum pressure of 35MPa, even if the maximum filling amount allowed by the hydrogen filling machine is reached, the temperature inside the on-board hydrogen storage bottle will not exceed 85°C. Therefore, eliminating the water chiller and the heat exchanger of the hydrogen filling machine meets the safety requirements for the temperature rise of the on-board hydrogen storage bottle of the fuel cell vehicle.

[0025] (5) The utility model is provided with a three-stage compression outlet dual-flow function of the three-stage compressor, that is, two hydrogen pipelines are led out from the three-stage compression outlet of the three-stage compressor, one of which goes to a hydrogen filling machine to fill hydrogen for fuel cell vehicles; and the other goes to a hydrogen filling column to fill hydrogen for long-tube trailers.

[0026] (6) The utility model realizes the functions of fueling fuel cell vehicles and charging long-tube trailers by setting the first valve, the second valve, and the third valve; regardless of whether there is hydrogen refueling for fuel cell vehicles, if it is necessary to charge the long-tube trailer with hydrogen, the opening of the second valve is controlled so that the pressure before the third valve does not exceed the first set value, such as 20MPa, to meet the requirement of safe charging of hydrogen to the long-tube trailer through the three-stage compression outlet of the three-stage compressor. If the pressure before the third valve exceeds the second set value, the second valve is closed; if the pressure before the third valve further increases and exceeds the third set value, the second valve is closed and the safety relief system is started at the same time to ensure that the hydrogen filling system is not over-pressurized, wherein the first set value, the second set value, and the third set value increase in sequence; under the condition that there is no hydrogen refueling for fuel cell vehicles, by closing the first valve, the hydrogen filling process can be temporarily stopped as appropriate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings in the specification, which constitute a part of the present application, are used to provide further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0028] Figure 1 It is a flow chart of filling and charging in a 35MPa pressure level hydrogenation station and a 20MPa pressure level hydrogenation mother station with fixed pipeline hydrogen supply in the background technology;

[0029] Figure 2 The utility model is a connection diagram of a fixed mother-child hydrogen filling station filling system for pipeline hydrogen supply in a refinery enterprise. DETAILED DESCRIPTION

[0030] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0031] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0032] In the present invention, the directions or positional relationships indicated by terms such as "upper", "lower", "bottom", "top", etc. are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention. They do not specifically refer to any part or element in the present invention and cannot be understood as limitations on the present invention.

[0033] In the present utility model, terms such as "connected" and "connection" should be understood in a broad sense, indicating that the connection can be fixed, integral or detachable; it can be directly connected or indirectly connected through an intermediate medium. For relevant scientific research or technical personnel in this field, the specific meaning of the above terms in the present utility model can be determined according to specific circumstances, and it cannot be understood as a limitation of the present utility model.

[0034] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0035] Embodiment 1:

[0036] like Figure 2 As shown, a fixed mother-child hydrogen filling station filling system for pipeline hydrogen supply of a refinery enterprise includes a hydrogen production device of the refinery enterprise;

[0037] The outlet of the hydrogen production device is connected to the first compression inlet of the three-stage compressor by a pipeline, and the third compression outlet of the three-stage compressor is connected to the inlet of the hydrogen filling machine by a pipeline, and the hydrogen filling machine is used to fill hydrogen for fuel cell vehicles;

[0038] The third-stage compression outlet of the three-stage compressor is also connected to a hydrogen filling column by a pipeline, and the hydrogen filling column is used to fill the long tube trailer with hydrogen;

[0039] The secondary compression inlet of the three-stage compressor is connected to the outlet of the spare unloading column through a pipeline, and the inlet of the spare unloading column is connected to the outlet of the spare long tube trailer through a pipeline.

[0040] Preferably, the design pressure of the three-stage compressor is 35 MPa.

[0041] Preferably, the three-stage compressor adopts a liquid-driven gas compressor to meet the requirements of starting and stopping at any time and reduce system energy consumption.

[0042] In the present application, the first hydrogen storage bottle group with a hydrogen storage pressure of 20MPa and the second hydrogen storage bottle group with a hydrogen storage pressure of 45MPa are cancelled, thereby saving equipment investment, and the hydrogen production device of the refinery at the source of pipeline hydrogen is used as the hydrogen storage system of the fixed mother-child hydrogen refueling station; since the second hydrogen storage bottle group with a hydrogen storage pressure of 45MPa is cancelled, the sequential control cabinet system for controlling the pressure charging and depressurization thereof is also cancelled, saving investment in automatic control facilities.

[0043] The design pressure of the three-stage compressor in this application is 35Mpa. A second hydrogen storage bottle group with a hydrogen storage pressure of 45MPa is provided in the existing filling process. The purpose is to store hydrogen and increase the speed of hydrogenation. This application uses the hydrogen production device of the refinery at the source of pipeline hydrogen as the hydrogen storage system of the fixed mother-child hydrogen filling station. After canceling the second hydrogen storage bottle group with a hydrogen storage pressure of 45MPa, the compressor outlet pressure no longer needs to be 45MPa, and it only needs to reach the design pressure of 35MP of the on-board hydrogen storage bottle when filling the fuel cell vehicle.

[0044] The present application cancels the first compressor of the secondary compression and the second compressor of the secondary compression, and optimizes them into a 35MPa liquid-driven compressor of the three-stage compression, thereby reducing the comprehensive equipment investment and energy consumption of the fixed mother-child hydrogenation station; the connecting pipes of the spare long tube trailer and the spare unloading column that need to be activated when the hydrogen production unit or the pipeline between the hydrogen production unit and the three-stage compressor are shut down are connected to the secondary compression inlet of the three-stage compressor, which can also ensure the normal operation of the hydrogenation station in the event of a temporary interruption of the hydrogen production unit or the pipeline between the hydrogen production unit and the three-stage compressor of the refining enterprise.

[0045] The present application eliminates the hydrogenation machine chiller and heat exchanger, simplifies the process, saves equipment investment, and reduces operating energy consumption; the existing hydrogenation machine is equipped with a hydrogenation machine chiller and a heat exchanger, the purpose of which is to prevent the Joule-Thomson effect from occurring during the hydrogen pressure increase process when hydrogen is refilled into a fuel cell vehicle, causing the on-board hydrogen storage bottle of the fuel cell vehicle to exceed the safe allowed 85°C; but after the present application eliminates the second hydrogen storage bottle group with a hydrogen storage pressure of 45MPa, the pressure of hydrogen refilled into the on-board hydrogen storage bottle of the fuel cell vehicle has been reduced from a maximum of 45MPa to a maximum of 35MPa. When hydrogen is refilled into the on-board hydrogen storage bottle of the fuel cell vehicle under a maximum pressure of 35MPa, even if the maximum refilling amount allowed by the hydrogenation machine is reached, the temperature inside the on-board hydrogen storage bottle will not exceed 85°C. Therefore, the hydrogenation machine chiller and heat exchanger are eliminated to meet the safety requirements for the temperature rise of the on-board hydrogen storage bottle of the fuel cell vehicle.

[0046] The present application sets up a dual-flow function for the three-stage compression outlet of the three-stage compressor, that is, two hydrogen pipelines are led out from the three-stage compression outlet of the three-stage compressor, one of which goes to the hydrogen filling machine to fill hydrogen for fuel cell vehicles; the other goes to the hydrogen filling column to fill hydrogen for long-tube trailers.

[0047] Embodiment 2:

[0048] On the basis of Example 1, a first valve is provided on the pipeline between the third-stage compression outlet of the three-stage compressor and the hydrogenation machine inlet.

[0049] Preferably, a second valve and a third valve are sequentially arranged on the pipeline between the third-stage compression outlet of the three-stage compressor and the hydrogen filling column according to the medium flow direction.

[0050] Preferably, the pipeline between the second valve and the third valve is connected to a safety relief system. Specifically, the safety relief system may be a safety relief system uniformly provided at a hydrogen refueling station, wherein components of the safety relief system are existing technologies.

[0051] Preferably, a pressure sensor for monitoring the pressure in front of the third valve is arranged on the pipeline between the second valve and the third valve.

[0052] This application realizes the functions of fuel cell vehicle filling and long tube trailer charging through the setting of the first valve, the second valve, and the third valve; regardless of whether there is hydrogen filling for the fuel cell vehicle, if the long tube trailer needs to be filled with hydrogen, the opening of the second valve is controlled so that the pressure before the third valve does not exceed the first set value, such as 20MPa, to meet the requirements for safe filling of hydrogen to the long tube trailer through the three-stage compression outlet of the three-stage compressor. If the pressure before the third valve exceeds the second set value, the second valve is closed; if the pressure before the third valve increases further and exceeds the third set value, the second valve is closed and the safety relief system is started to ensure that the hydrogen filling system is not over-pressurized, wherein the first set value, the second set value, and the third set value increase in sequence; under the condition that there is no hydrogen filling for the fuel cell vehicle, by closing the first valve, the hydrogen filling process can be temporarily stopped as appropriate.

[0053] Embodiment 3:

[0054] Based on Example 1 or Example 2, the three-stage compressor is connected to the chiller through a cooling circuit.

[0055] Preferably, the chiller comprises a first cooler, a second cooler, and a third cooler;

[0056] The first-stage compression outlet of the three-stage compressor is connected to the inlet of the first cooler, the outlet of the first cooler is connected to the second-stage compression inlet of the three-stage compressor, the second-stage compression outlet of the three-stage compressor is connected to the inlet of the second cooler, the outlet of the second cooler is connected to the third-stage compression inlet of the three-stage compressor, the third-stage compression outlet of the three-stage compressor is connected to the inlet of the third cooler, and the outlet of the third cooler is connected to the pipeline connecting the hydrogenator and the hydrogen filling column.

[0057] Although the specific implementation methods of the present invention are described above in conjunction with the accompanying drawings, this is not a limitation of the present invention. Technical personnel in the relevant field should understand that on the basis of the technical solution of the present invention, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the protection scope of the present invention.

Claims

1. A fixed mother-child hydrogen filling station filling system for pipeline hydrogen supply of a refinery enterprise, comprising a hydrogen production device of the refinery enterprise; characterized in that: The outlet of the hydrogen production device is connected to the first compression inlet of the three-stage compressor by a pipeline, and the third compression outlet of the three-stage compressor is connected to the inlet of the hydrogenation machine by a pipeline; The third-stage compression outlet of the three-stage compressor is also connected to the hydrogen filling column by pipeline; The secondary compression inlet of the three-stage compressor is connected to the outlet of the spare unloading column by a pipeline, and the inlet of the spare unloading column is connected to the outlet of the spare long tube trailer by a pipeline.

2. The fixed mother-child hydrogen filling station filling system for pipeline hydrogen supply of a refinery enterprise as claimed in claim 1, characterized in that: The design pressure of the three-stage compressor is 35Mpa.

3. The fixed mother-child hydrogen filling station filling system for pipeline hydrogen supply of a refinery enterprise as claimed in claim 1, characterized in that: The three-stage compressor is a liquid-driven gas compressor.

4. The fixed mother-child hydrogen filling station filling system for pipeline hydrogen supply of a refinery enterprise as claimed in claim 1, characterized in that: A first valve is provided on the pipeline between the third-stage compression outlet of the three-stage compressor and the hydrogenation machine inlet.

5. The fixed mother-child hydrogen filling station filling system for pipeline hydrogen supply of a refinery enterprise as claimed in claim 4, characterized in that: A second valve and a third valve are sequentially arranged on the pipeline between the third-stage compression outlet of the three-stage compressor and the hydrogen filling column according to the medium flow direction.

6. The fixed mother-child hydrogen filling station filling system for pipeline hydrogen supply of a refinery enterprise as claimed in claim 5, characterized in that: The pipeline between the second valve and the third valve is connected to the safety release system.

7. The fixed mother-child hydrogen filling station filling system for pipeline hydrogen supply of a refinery enterprise as claimed in claim 6, characterized in that: A pressure sensor for monitoring the pressure in front of the third valve is arranged on the pipeline between the second valve and the third valve.

8. The fixed mother-child hydrogen filling station filling system for pipeline hydrogen supply of a refinery enterprise as claimed in claim 1, characterized in that: The three-stage compressor is connected to the chiller through a cooling circuit.

9. The fixed mother-child hydrogen filling station filling system for pipeline hydrogen supply of a refinery enterprise as claimed in claim 8, characterized in that: The chiller comprises a first cooler, a second cooler and a third cooler; The first-stage compression outlet of the three-stage compressor is connected to the inlet of the first cooler, the outlet of the first cooler is connected to the second-stage compression inlet of the three-stage compressor, the second-stage compression outlet of the three-stage compressor is connected to the inlet of the second cooler, the outlet of the second cooler is connected to the third-stage compression inlet of the three-stage compressor, the third-stage compression outlet of the three-stage compressor is connected to the inlet of the third cooler, and the outlet of the third cooler is connected to the pipeline connecting the hydrogenator and the hydrogen filling column.

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