Internal heat exchange system of skid-mounted liquid hydrogen refueling station

Abstract

The utility model relates to the technical field of liquid hydrogen storage, in particular to an internal heat exchange system of a skid-mounted liquid hydrogen refueling station. The top of the liquid hydrogen storage tank is connected with the buffer tank through a pipeline, the buffer tank is connected with a gas inlet of the hydrogen booster pump through a pipeline, a gas outlet of the hydrogen booster pump is connected with the first-stage hydrogen cooler through a pipeline, and the first-stage hydrogen cooler is connected with the high-pressure buffer tank through a pipeline. The high-pressure buffer tank is connected with a secondary hydrogen cooler through a pipeline; the bottom of the liquid hydrogen storage tank is connected with the liquid hydrogen bottle through a pipeline, a liquid outlet of the liquid hydrogen booster pump is connected with an inlet of the heat exchange and cold supply assembly through a pipeline, and an outlet of the heat exchange and cold supply assembly is connected with the high-pressure buffer tank through a pipeline. The first-stage hydrogen cooler and the second-stage hydrogen cooler provide heat sources for the heat exchange and cold supply assembly to enable liquid hydrogen to be gasified, and the heat exchange and cold supply assembly provides cold sources for the first-stage hydrogen cooler and the second-stage hydrogen cooler to cool hydrogen, so that a large amount of energy can be saved, and the purposes of saving energy and reducing consumption are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to liquid hydrogen hydrogen storage technical field especially relates to a liquid hydrogen hydrogenation station internal heat exchange system. BACKGROUND

[0002] At present, in the hydrogenation pry station, the gas source of hydrogenation machine all comes from liquid hydrogen storage tank, and its specific conversion process is that liquid hydrogen in liquid hydrogen storage tank enters liquid hydrogen bottle first, carries out pressure boost to liquid hydrogen through liquid hydrogen booster pump, then enters vaporizer and carries out gasification, and finally enters hydrogenation machine to carry out hydrogenation operation to vehicle. In the present hydrogenation pry station, since part of liquid hydrogen will gasify in the actual hydrogen storage process of liquid hydrogen storage tank, hydrogen flash gas is generated at the top of liquid hydrogen storage tank, and this part of gas is not fully utilized in liquid hydrogen storage tank, forming waste. Moreover, when liquid hydrogen gasification, hydrogen cooler and other components work, some components need cold source, and some components need heat source, if heat exchange between these components can be carried out, a large amount of energy can be saved, and there is no good solution for the above problems at present.

[0003] In summary, how to fully utilize heat exchange between components in hydrogenation pry station has become a technical problem to be solved in the industry. UTILITY MODEL CONTENT

[0004] The utility model provides a liquid hydrogen hydrogenation station internal heat exchange system to make up for the deficiency of prior art, solves the problem of full utilization of heat exchange between components in hydrogenation pry station.

[0005] The utility model adopts the technical scheme that:

[0006] A liquid hydrogen hydrogenation station internal heat exchange system, including liquid hydrogen storage tank, the bottom of liquid hydrogen storage tank contains liquid hydrogen, and the top is hydrogen flash gas, the top of liquid hydrogen storage tank is connected with buffer tank through pipeline, buffer tank is connected with the gas inlet of hydrogen booster pump again through pipeline, the gas outlet of hydrogen booster pump is connected with primary hydrogen cooler through pipeline, primary hydrogen cooler is connected with high pressure buffer tank again through pipeline, high pressure buffer tank is connected with secondary hydrogen cooler again through pipeline, and secondary hydrogen cooler is connected with hydrogenation machine through pipeline again;The bottom of liquid hydrogen storage tank is connected with liquid hydrogen bottle through pipeline, liquid hydrogen booster pump is inserted in liquid hydrogen bottle, and the liquid outlet of liquid hydrogen booster pump is connected with the inlet of heat exchange cold supply assembly through pipeline, and the outlet of heat exchange cold supply assembly is connected with high pressure buffer tank through pipeline.

[0007] The heat exchange cold supply assembly includes air bath vaporizer and water bath vaporizer which are connected.

[0008] The liquid hydrogen booster pump is connected with the liquid hydrogen hydrogenation machine through a pipeline.

[0009] The above scheme has the following advantages:

[0010] The hydrogen flash gas on the top of the liquid hydrogen storage tank is first stored in the buffer tank, then is pressurized by the hydrogen booster pump, and after pressurization, needs to be cooled by the first hydrogen cooler and then enters the high-pressure buffer tank, and the hydrogen in the high-pressure buffer tank is cooled by the second hydrogen cooler and then enters the hydrogen hydrogenation machine, realizing the hydrogen hydrogenation function; at the same time, the liquid hydrogen at the bottom of the liquid hydrogen storage tank can enter the liquid hydrogen bottle, and after pressurization by the liquid hydrogen booster pump, enters the heat exchange cooling assembly, so that the liquid hydrogen is gasified, and then is supplied to the high-pressure buffer tank; during this period, the heat exchange cooling assembly is connected with the first hydrogen cooler and the second hydrogen cooler for heat exchange, and the first hydrogen cooler and the second hydrogen cooler provide heat source for the heat exchange cooling assembly to gasify the liquid hydrogen, and the heat exchange cooling assembly provides cold source for the first hydrogen cooler and the second hydrogen cooler to cool the hydrogen, which can save a large amount of energy and achieve the purpose of energy saving and consumption reduction. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 The utility model discloses a structure principle schematic diagram.

[0012] In the drawing, 1, liquid hydrogen storage tank, 2, buffer tank, 3, hydrogen booster pump, 4, first hydrogen cooler, 5, high-pressure buffer tank, 6, second hydrogen cooler, 7, hydrogen hydrogenation machine, 8, liquid hydrogen bottle, 9, liquid hydrogen booster pump, 10, heat exchange cooling assembly, 11, liquid hydrogen hydrogenation machine. DETAILED DESCRIPTION

[0013] In order to clearly illustrate the technical features of the scheme, the utility model will be described in detail below through specific implementation mode, and in combination with its drawings.

[0014] For example, the liquid hydrogen storage tank 1 is connected with the buffer tank 2 through a pipeline, and the buffer tank 2 is connected with the hydrogen booster pump 3 through a pipeline. Figure 1As shown, a liquid hydrogen sled-mounted hydrogen station internal heat exchange system, including a liquid hydrogen storage tank 1, the bottom of the liquid hydrogen storage tank 1 contains liquid hydrogen, the top is hydrogen flash gas, the top of the liquid hydrogen storage tank 1 is connected with the buffer tank 2 through the pipeline, the buffer tank 2 is connected with the hydrogen booster pump 3 inlet through the pipeline, the hydrogen booster pump 3 outlet is connected with the primary hydrogen cooler 4 through the pipeline, the primary hydrogen cooler 4 is connected with the high-pressure buffer tank 5 through the pipeline, the high-pressure buffer tank 5 is connected with the secondary hydrogen cooler 6 through the pipeline, and the secondary hydrogen cooler 6 is connected with the hydrogen hydrogenation machine 7 through the pipeline; the bottom of the liquid hydrogen storage tank 1 is connected with the liquid hydrogen bottle 8 through the pipeline, the liquid hydrogen bottle 8 is inserted with the liquid hydrogen booster pump 9, the liquid outlet of the liquid hydrogen booster pump 9 is connected with the inlet of the heat exchange cooling assembly 10 through the pipeline, and the outlet of the heat exchange cooling assembly 10 is connected with the high-pressure buffer tank 5 through the pipeline; the heat exchange cooling assembly 10 is connected with the primary hydrogen cooler 4 and the secondary hydrogen cooler 5 respectively for heat exchange.

[0015] The heat exchange cooling assembly 10 includes a connected air bath vaporizer and a water bath vaporizer, which can gasify liquid hydrogen and provide a cold source for the required components.

[0016] The liquid outlet of the liquid hydrogen booster pump 9 is also connected with the liquid hydrogen hydrogenation machine 11 through the pipeline to realize the liquid hydrogen hydrogenation function.

[0017] Working principle:

[0018] The hydrogen flash gas at the top of the liquid hydrogen storage tank 1 first enters the buffer tank 2 for storage, and then is pressurized by the hydrogen booster pump 3. The temperature of the hydrogen after pressurization will rise, so it needs to enter the primary hydrogen cooler 4 to cool the hydrogen, and then enter the high-pressure buffer tank 5 for storage. At the same time, the liquid hydrogen at the bottom of the liquid hydrogen storage tank 1 can enter the liquid hydrogen bottle 8, be pressurized by the liquid hydrogen booster pump 9, and then enter the heat exchange cooling assembly 10 to make the liquid hydrogen gasify, and also enter the high-pressure buffer tank 5 to meet the required pressure requirement. The hydrogen in the high-pressure buffer tank 5 enters the hydrogen hydrogenation machine 7 after being cooled by the secondary hydrogen cooler 6, realizing the hydrogen hydrogenation function. During this period, the heat exchange cooling assembly 10 is connected with the primary hydrogen cooler 4 and the secondary hydrogen cooler 6 respectively for heat exchange. The primary hydrogen cooler 4 and the secondary hydrogen cooler 6 provide a heat source for the heat exchange cooling assembly 10 to make the liquid hydrogen gasify, and the heat exchange cooling assembly 10 provides a cold source for the primary hydrogen cooler 4 and the secondary hydrogen cooler 6 to cool the hydrogen, realizing the internal heat exchange of the liquid hydrogen sled-mounted hydrogen station. In this way, a large amount of energy can be saved.

[0019] The above specific embodiments cannot be regarded as a limitation on the protection scope of the present application. Any alternative improvement or change made by those skilled in the art to the embodiments of the present application falls within the protection scope of the present application.

[0020] The utility model discloses a kind of, the detailed description of the utility model is as follows: the utility model discloses a kind of, the detailed description of the utility model is as follows:

Claims

1. A liquid hydrogen skid-mounted hydrogen station internal heat exchange system, characterized in that: The application relates to a hydrogen storage system, which comprises a liquid hydrogen storage tank, a buffer tank, a hydrogen booster pump, a primary hydrogen cooler, a high-pressure buffer tank, a secondary hydrogen cooler and a hydrogen hydrogenation machine.

2. The internal heat exchange system of a liquid hydrogen skid-mounted hydrogen station according to claim 1, characterized in that: The heat exchange and cooling assembly comprises an air bath vaporizer and a water bath vaporizer which are connected.

3. The internal heat exchange system of a liquid hydrogen skid-mounted hydrogen station according to claim 1, characterized in that: The liquid hydrogen booster pump is also connected with the liquid hydrogen hydrogenation machine through a pipeline.

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