Underground hydrogen storage device of hydrogen refueling station

Abstract

The utility model discloses a hydrogen refueling station underground hydrogen storage device which comprises a hydrogen storage tank buried underground, a hydrogen refueling pipe is arranged in the hydrogen storage tank in a penetrating mode, one end of the hydrogen refueling pipe extends to the outside of the hydrogen storage tank and is provided with a filling connector, and a control valve is arranged on the portion, outside the hydrogen storage tank, of the hydrogen refueling pipe. The hydrogen storage tank is composed of an inner tank made of steel and an outer tank made of concrete. A plurality of exhaust holes are formed in the top of the outer tank, backfill soil is arranged outside the outer tank, and a cushion foundation is arranged at the bottom; a water collecting well is arranged at the position, close to the hydrogen storage tank, of the ground, the water collecting well is communicated with the bottom of the outer tank through a drainage pipe, and an automatic fire pump is arranged in the water collecting well. The volume of the hydrogen storage tank is not limited by the space of a hydrogen refueling station above the ground, the hydrogen storage capacity of the hydrogen refueling station can be improved to a great extent, the hydrogen storage capacity is improved, the hydrogen transportation frequency can be reduced, and the hydrogen transportation cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen refueling stations, in particular to an underground hydrogen storage device for a hydrogen refueling station. Background Art

[0002] Currently, hydrogen refueling stations at home and abroad primarily consist of a gas unloading column, compressor, hydrogen storage tank group, sequence control cabinet, hydrogen refueling machine, and chiller. Hydrogen entering the station is primarily supplied by hydrogen tube trailers or hydrogen tube bundle containers, or produced by nearby hydrogen production plants or in-station hydrogen production systems, and then transported via hydrogen pipelines to the station's ground-based hydrogen storage tank group.

[0003] In the existing technology, due to space limitations on the ground, the scale of hydrogen storage bottle groups at ground hydrogen refueling stations is generally based on a single gas cylinder as a unit. The hydrogen storage capacity of a single gas cylinder is 1 cubic meter. Each hydrogen refueling station generally has 2-3 groups of hydrogen storage bottle groups, each group has 18 bottles, which is about 18 cubic meters. The total fixed hydrogen storage capacity is about 50 cubic meters. Even if the hydrogen storage capacity of the long-tube trailer is added, the total hydrogen storage capacity is only about 2670 kg, and the hydrogen storage capacity is relatively small; the daily hydrogen refueling capacity of the hydrogen refueling station is 1000 kg, and the refueling time of a single hydrogen fuel cell logistics vehicle is about 5 minutes, and the refueling time of a single hydrogen fuel cell logistics vehicle is about 10 to 15 minutes. The maximum refueling flow rate of a single gun is about 3.6 kg / min, and the refueling amount of each hydrogen fuel cell vehicle is 180 kg each time. Therefore, the number of hydrogen fuel cell vehicles supplied by a hydrogen refueling station per day is about 14 vehicles, and the gas cylinder groups of the hydrogen refueling station need to be frequently transported.

[0004] Therefore, how to design a hydrogen storage device to expand the hydrogen storage capacity of a hydrogen refueling station while reducing the transportation cost of hydrogen has become a technical problem that technicians in this field urgently need to solve. Utility Model Content

[0005] In view of the above-mentioned defects of the prior art, the present invention provides an underground hydrogen storage device for a hydrogen refueling station, the purpose of which is to expand the hydrogen storage capacity of the hydrogen refueling station and reduce the transportation cost of hydrogen.

[0006] To achieve the above technical objectives, the present invention provides an underground hydrogen storage device for a hydrogen refueling station, comprising a hydrogen storage tank buried underground, a hydrogen refueling pipe passing through the hydrogen storage tank, one end of the hydrogen refueling pipe extending to the outside of the hydrogen storage tank and provided with a filling interface, and a control valve provided on the external portion of the hydrogen refueling pipe;

[0007] The hydrogen storage tank consists of an inner tank made of steel and an outer tank made of concrete;

[0008] The top of the outer tank is provided with a plurality of exhaust holes, the outside is provided with backfill soil, and the bottom is provided with a cushion foundation;

[0009] A water collection well is provided on the ground near the hydrogen storage tank, the water collection well is connected to the bottom of the outer tank through a drainage pipe, and an automatic fire pump is provided in the water collection well.

[0010] Preferably, the exhaust hole consists of a ventilation hole located at the top of the outer tank and a plurality of plum blossom-shaped emission holes.

[0011] Preferably, the backfill soil is plain soil, and geotextiles are arranged at intervals along the longitudinal direction.

[0012] Preferably, the cushion foundation consists of a three-layer structure, which comprises, from top to bottom, a crushed stone layer, a concrete base layer and a concrete cushion layer.

[0013] Preferably, an inner wall of the outer tank is provided with an inspection ladder, and a top of the outer tank is provided with an inspection hole corresponding to the position of the inspection ladder.

[0014] Beneficial effects of the utility model:

[0015] Due to the above-mentioned structural design, the volume of the hydrogen storage tank of the utility model is not limited by the space of the hydrogen refueling station above the ground, which can greatly increase the hydrogen storage capacity of the hydrogen refueling station. While increasing the hydrogen storage capacity, the frequency of hydrogen transportation can be reduced, thereby reducing the transportation cost of hydrogen. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the utility model

[0017] In the figure: 1 ground, 2 hydrogen storage tank, 21 inner tank, 22 outer tank, 3 hydrogenation pipe, 4 control valve, 5 filling interface, 6 ventilation hole, 7 backfill soil, 8 geotextile, 9 water collection well, 10 drainage pipe, 11 automatic fire pump, 12 cushion foundation, 13 inspection hole, 14 inspection ladder. DETAILED DESCRIPTION

[0018] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention.

[0019] Example:

[0020] like Figure 1 As shown, the underground hydrogen storage device of the hydrogen refueling station includes a 300 cubic meter hydrogen storage tank 2 buried under the ground 1. A hydrogenation pipe 3 is provided in the hydrogen storage tank 2. One end of the hydrogenation pipe 3 extends to the outside of the hydrogen storage tank 2 and is provided with a filling interface 5. The hydrogenation pipe 3 is provided with a control valve 4 on the external part of the hydrogen storage tank 2.

[0021] The hydrogen storage tank 2 consists of an inner tank 21 made of steel and an outer tank 22 made of concrete;

[0022] The top of the outer tank 22 is provided with a plurality of exhaust holes, the outside is provided with backfill soil 7, and the bottom is provided with a cushion foundation 12;

[0023] A water collection well 9 is provided on the ground 1 near the hydrogen storage tank 2 . The water collection well 9 is connected to the bottom of the outer tank 22 through a drainage pipe 10 . An automatic fire pump 11 is provided in the water collection well 9 .

[0024] The main innovation of the present invention is that the hydrogen storage tank 2 is buried under the ground 1, does not occupy the space above the ground 1 and can store more hydrogen, which can meet a wider range of hydrogenation peak regulation.

[0025] Specifically, an automated fire pump 11 and a water collection well 9 are used to remove water from the bottom of the hydrogen storage tank 2 beneath the ground 1. The water collection well 9 is made of DN600, No. 20 steel, and a drainage pipe 10 extends 1.5 meters beyond the bottom of the hydrogen storage tank 2. Water accumulated inside the hydrogen storage tank 2 is drained into the water collection well 9 through the drainage pipe 10. When the water reaches a certain capacity, the automated fire pump 11 automatically activates the drainage system.

[0026] More specifically, the outer tank 22 is cast with 10-C35 concrete, the top thickness of the outer tank 22 is 10 cm, and the exhaust holes are composed of a vent 6 with a diameter of 50 cm at the top of the outer tank 22 and a plurality of plum blossom-shaped vents ( Figure 1 Not shown) composition.

[0027] The outside of the outer tank 22 is backfilled with layered backfill soil 7. The backfill soil 7 is plain soil, and geotextiles 8 are arranged at intervals along the longitudinal direction. The interval between adjacent geotextiles 8 is 1 m.

[0028] Furthermore, the cushion foundation 12 consists of a three-layer structure, which is composed of a 10 cm thick gravel layer, a 20 cm thick C25 concrete base layer and a 15 cm thick C15 concrete cushion layer from top to bottom. Among them, the top gravel layer is convenient for draining the accumulated water falling from the top of the hydrogen storage tank 2 to the collection well 9 when it rains.

[0029] In order to facilitate routine maintenance of the hydrogen storage tank 2 , an inspection ladder 14 is provided on the inner wall of the outer tank 22 , and an inspection hole 13 is provided on the top of the outer tank 22 corresponding to the position of the inspection ladder 14 .

[0030] The above describes in detail the preferred embodiments of the present invention. It should be understood that those skilled in the art can make numerous modifications and variations based on the concepts of the present invention without inventive effort. Therefore, any technical solutions that can be derived by those skilled in the art based on the concepts of the present invention through logical analysis, reasoning, or limited experimentation based on the existing technology should be within the scope of protection defined by the claims.

Claims

1. The underground hydrogen storage device of the hydrogen refueling station includes a hydrogen storage tank buried underground, characterized in that: A hydrogenation pipe is provided in the hydrogen storage tank, one end of which extends to the outside of the hydrogen storage tank and is provided with a filling interface, and a control valve is provided on the external part of the hydrogenation pipe; The hydrogen storage tank is composed of an inner tank made of steel and an outer tank made of concrete; The top of the outer tank is provided with a plurality of exhaust holes, the outside is provided with backfill soil, and the bottom is provided with a cushion foundation; A water collection well is arranged on the ground near the hydrogen storage tank, the water collection well is connected with the bottom of the outer tank through a drainage pipe, and an automatic fire pump is arranged in the water collection well.

2. The underground hydrogen storage device for a hydrogen refueling station according to claim 1, characterized in that: The exhaust hole is composed of a ventilation hole located at the top of the outer tank and a plurality of plum blossom-shaped emission holes.

3. The underground hydrogen storage device for a hydrogen refueling station according to claim 2, characterized in that: The backfill soil is plain soil, and geotextiles are arranged at intervals along the longitudinal direction.

4. The underground hydrogen storage device for a hydrogen refueling station according to any one of claims 2 or 3, characterized in that: The cushion foundation consists of a three-layer structure, which is composed of a crushed stone layer, a concrete foundation layer and a concrete cushion layer from top to bottom.

5. The underground hydrogen storage device for a hydrogen refueling station according to claim 4, characterized in that: The inner wall of the outer tank is provided with a maintenance ladder, and the top of the outer tank is provided with an inspection hole corresponding to the position of the maintenance ladder.

Images