Nitrogen charging system for hydrogen production device

Abstract

The utility model relates to the technical field of hydrogen production equipment, in particular to a nitrogen charging system for a hydrogen production device, which comprises a nitrogen supply pipeline, a gas-liquid separation pipeline and a nitrogen inlet pipeline which are communicated in sequence, the gas-liquid separation pipeline is provided with a separation assembly used for separating alkali liquor in nitrogen, the nitrogen inlet pipeline is sequentially provided with an automatic shut-off valve, a one-way valve and a manual shut-off valve, and the automatic shut-off valve is connected with the hydrogen production device. The problem that the alkali liquor is poured back due to inner leakage of the one-way valve is solved, and a small amount of alkali liquor can be separated and discharged through the gas-liquid separator after being replaced each time and flows back.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydrogen production equipment technical field especially relates to a nitrogen filling system for hydrogen production device. BACKGROUND

[0002] In order to prevent the hydrogen production system operation generated hydrogen and air mixed explosive gas, hydrogen production equipment needs to use inert gas to purge frame system before putting into operation, replaces the air in container, pipeline etc., plays the role of safe operation.

[0003] The nitrogen filling device of conventional configuration is provided with check valve and shut-off valve, once check valve leaks, lye will enter nitrogen pipeline, and lye has corrosivity, will damage corresponding instrument and equipment of nitrogen system, produces loss. SUMMARY

[0004] The utility model discloses a nitrogen filling system for hydrogen production device, which solves the above-mentioned shortcomings in the prior art.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] Design a kind of nitrogen filling system for hydrogen production device, including the communication of nitrogen supply pipeline, gas-liquid separation pipeline, nitrogen inlet pipeline in proper order, it is equipped with total shut-off valve on the nitrogen supply pipeline, the total shut-off valve and nitrogen gas supply system are connected, it is equipped with the separation component for separating lye in nitrogen on the gas-liquid separation pipeline, it is equipped with automatic shut-off valve, check valve, manual shut-off valve in proper order on the nitrogen inlet pipeline, the automatic shut-off valve is connected with hydrogen production device.

[0007] Further, the separation component includes a gas-liquid separator and a manual blowdown valve connected to the gas-liquid separator.

[0008] Further, the manual blowdown valve is located below the gas-liquid separator.

[0009] Further, the nitrogen supply pipeline and the gas-liquid separation pipeline are horizontally arranged, and the height of the nitrogen supply pipeline is lower than the height of the gas-liquid separation pipeline.

[0010] Further, the nitrogen inlet pipeline is vertically arranged, and the automatic shut-off valve, check valve and manual shut-off valve are distributed from high to low on the nitrogen inlet pipeline.

[0011] The nitrogen filling system for hydrogen production device has the following advantages:

[0012] The utility model discloses a prevent replacement lye pour back nitrogen gas pipeline to destroy nitrogen gas system, and independently optimizes a set of nitrogen filling system, needs nitrogen replacement system every time, opens the manual blow-off valve first, discharges the liquid remaining of gas-liquid separator, and determines whether the one-way valve leaks again to have lye flow, if no, can remote start automatic closing valve and manual closing valve and hydrogen production device are filled with nitrogen, and after the nitrogen filling is finished, closes the corresponding valve, and opens the manual blow-off valve of gas-liquid separator and removes the residual liquid, ensures that no lye enters nitrogen gas pipeline,

[0013] The utility model discloses setting up automatic closing valve and manual closing valve double protection, solve the problem of lye pour back caused by one-way valve leakage, and the small amount of lye reflux of replacement every time can also be separated and discharged through gas-liquid separator. DRAWINGS

[0014] Figure 1 It is structure schematic drawing for the utility model; CONCRETE IMPLEMENTING METHOD

[0015] The technical scheme in the embodiments of the utility model will be apparently and completely described below in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments.

[0016] Embodiment, refer to Figure 1 A nitrogen filling system for hydrogen production device, including in turn communicating nitrogen supply pipeline 1, gas-liquid separation pipeline 2, nitrogen inlet pipeline 3, be equipped with total closing valve 4 on nitrogen supply pipeline 1, total closing valve 4 and nitrogen gas supply system 9 are connected, be equipped with the separation assembly 5 for separating lye in nitrogen on gas-liquid separation pipeline 2, be equipped with automatic closing valve 6, one-way valve 7, manual closing valve 8 in turn on nitrogen inlet pipeline 3, automatic closing valve 6 and hydrogen production device 10 are connected.

[0017] The utility model discloses to prevent replacement lye pour back nitrogen gas pipeline to destroy nitrogen gas system, and independently optimizes a set of nitrogen filling system, needs nitrogen replacement system every time, opens the manual blow-off valve first, discharges the liquid remaining of gas-liquid separator, and determines whether the one-way valve leaks again to have lye flow, if no, can remote start automatic closing valve and manual closing valve and hydrogen production device are filled with nitrogen, and after the nitrogen filling is finished, closes the corresponding valve, and opens the manual blow-off valve of gas-liquid separator and removes the residual liquid, ensures that no lye enters nitrogen gas pipeline.The utility model discloses setting up automatic closing valve and manual closing valve double protection, solve the problem of lye pour back caused by one-way valve leakage, and the small amount of lye reflux of replacement every time can also be separated and discharged through gas-liquid separator.

[0018] In an optional embodiment of the utility model, in order to prevent lye backflow into nitrogen pipeline, the applicant sets separation assembly 5 on gas-liquid separation pipeline 2, and separation assembly 5 includes gas-liquid separator 501 and hand blowdown valve 502 connected with gas-liquid separator 501.

[0019] In an optional embodiment of the utility model, hand blowdown valve 502 is below gas-liquid separator 501, and by opening hand blowdown valve 502, the lye separated by gas-liquid separator 501 is discharged, ensuring that no lye enters nitrogen pipeline.

[0020] In an optional embodiment of the utility model, nitrogen supply pipeline 1 and gas-liquid separation pipeline 2 are horizontally arranged, and the height of nitrogen supply pipeline 1 is lower than the height of gas-liquid separation pipeline 2, which can prevent lye backflow.

[0021] In an optional embodiment of the utility model, nitrogen inlet pipeline 3 is vertically arranged, and automatic shut-off valve 6, check valve 7 and hand shut-off valve 8 are distributed from high to low on nitrogen inlet pipeline 3, each time nitrogen replacement system is needed, first open hand blowdown valve 502, discharge the residual liquid in gas-liquid separator 501, and determine whether check valve 7 leaks, and if not, open automatic shut-off valve 6 and hand shut-off valve 8 to charge nitrogen for hydrogen production device, after charging nitrogen, close the corresponding valve, and open hand blowdown valve 502 of gas-liquid separator 501 to discharge residual liquid, ensuring that no lye enters nitrogen pipeline. By setting automatic shut-off valve 6 and hand shut-off valve 8, the problem of lye backflow caused by check valve 7 leakage is solved.

[0022] Although the embodiments of the utility model have been shown and described above, it should be understood that the above embodiments are exemplary and cannot be understood as limiting the utility model, and those skilled in the art can change, modify, replace and modify the above embodiments within the scope of the utility model.

[0023] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the technical scheme of the patent and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the present application.

[0024] In addition, the terms "first", "second", etc. are used only for descriptive purposes and do not connote or imply a relative importance of or a specific order of the indicated features. Thus, a feature defined with "first" or "second" can include at least one of the features. In the description of the present patent application, the meaning of "a plurality" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0025] In the present specification, unless specifically and particularly defined otherwise, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, or can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically defined. For those skilled in the art, the specific meaning of the above terms in the present specification can be understood according to the specific circumstances.

[0026] In the present specification, unless specifically and particularly defined otherwise, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0027] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present specification and the features of different embodiments or examples, without contradiction.

[0028] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and modifications to the above embodiments within the scope of the present application.

Claims

1. A nitrogen charging system for a hydrogen production unit, characterized in that: It includes a nitrogen supply pipeline (1), a gas-liquid separation pipeline (2), and a nitrogen inlet pipeline (3) connected in sequence. The nitrogen supply pipeline (1) is equipped with a main shut-off valve (4), which is connected to the nitrogen supply system (9). The gas-liquid separation pipeline (2) is equipped with a separation component (5) for separating alkaline liquid from nitrogen. The nitrogen inlet pipeline (3) is equipped with an automatic shut-off valve (6), a one-way valve (7), and a manual shut-off valve (8) in sequence. The automatic shut-off valve (6) is connected to the hydrogen production device (10).

2. The nitrogen filling system according to claim 1, characterized in that: The separation component (5) includes a gas-liquid separator (501) and a manual drain valve (502) connected to the gas-liquid separator (501).

3. The nitrogen filling system according to claim 2, characterized in that: The manual drain valve (502) is located below the gas-liquid separator (501).

4. The nitrogen filling system according to claim 1, characterized in that: The nitrogen supply pipeline (1) and the gas-liquid separation pipeline (2) are arranged horizontally, and the height of the nitrogen supply pipeline (1) is lower than the height of the gas-liquid separation pipeline (2).

5. The nitrogen filling system according to claim 1, characterized in that: The nitrogen inlet pipeline (3) is arranged longitudinally, and the automatic shut-off valve (6), check valve (7), and manual shut-off valve (8) are distributed on the nitrogen inlet pipeline (3) from high to low.

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