Nitrogen generation device

Abstract

The utility model provides a nitrogen making device. Comprising a base, a plurality of groups of nitrogen making modules arranged on the base in parallel, a plurality of gas inlet branch pipes arranged on one side of the plurality of groups of nitrogen making modules and connected with the plurality of groups of nitrogen making modules, a gas inlet main pipe connected with the plurality of gas inlet branch pipes, a plurality of gas outlet branch pipes connected with the plurality of groups of nitrogen making modules, and a gas outlet connecting pipe connected with the plurality of gas outlet branch pipes, the buffer tank is arranged on the outer side of the base, the exhaust connecting pipe is arranged on the other side of the nitrogen generation modules and connected with the buffer tank, the exhaust branch pipes are connected with the exhaust connecting pipe, and the flow detector is arranged on the exhaust connecting pipe. And the plurality of nitrogen generation modules, the plurality of gas inlet branch pipes and the plurality of gas exhaust branch pipes are in one-to-one correspondence. The nitrogen-making device comprises a plurality of nitrogen-making modules, when one nitrogen-making module fully adsorbs oxygen, the other nitrogen-making module can be switched to carry out nitrogen-making on the other nitrogen-making module, and the nitrogen-making efficiency is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of nitrogen making devices, in particular to a nitrogen making device. Background Art

[0002] Membrane separation nitrogen production is the world's most advanced air separation nitrogen production technology in the 1990s. Since nitrogen is an inert gas and is difficult to react with other substances at room temperature, it is necessary to use a nitrogen source to provide cover gas, purge gas, etc. for platform equipment during the production process of offshore platforms. Existing nitrogen generators usually only include one nitrogen production module (membrane). Each time the nitrogen production module produces nitrogen, a certain amount of time needs to be reserved to fully adsorb oxygen for nitrogen production. The reserved time is usually not less than 45 seconds, which directly leads to low efficiency and sometimes the problem of substandard nitrogen purity occurs. Utility Model Content

[0003] The technical problem solved by the utility model is to provide a nitrogen making device.

[0004] In order to solve the above technical problems, the utility model provides a nitrogen making device, comprising a base, a plurality of nitrogen making modules arranged in parallel on the base, a plurality of air intake branch pipes arranged on one side of the plurality of nitrogen making modules and respectively connected to the plurality of nitrogen making modules, an air intake main pipe connected to the plurality of air intake branch pipes, a plurality of air outlet branch pipes respectively connected to the plurality of nitrogen making modules, an air outlet connecting pipe connected to the plurality of air outlet branch pipes, a buffer tank arranged on the outside of the base, an exhaust connecting pipe arranged on the other side of the plurality of nitrogen making modules and connected to the buffer tank, a plurality of exhaust branch pipes connected to the exhaust connecting pipe, and a flow detector arranged on the exhaust connecting pipe; the plurality of nitrogen making modules, the plurality of air intake branch pipes, and the plurality of exhaust branch pipes correspond one to one.

[0005] Furthermore, a lower exhaust pipe is provided on one side of each nitrogen production module, and a lower exhaust valve and a muffler are provided on the lower exhaust pipe.

[0006] Furthermore, the upper portion of the exhaust connecting pipe is also connected to a drain pipe.

[0007] Furthermore, the plurality of air inlet branch pipes are located below the plurality of air outlet branch pipes.

[0008] Furthermore, a first pressure regulating valve is provided on the air intake main pipe, and air control valves are provided on the air intake branch pipe, the air outlet branch pipe, the air outlet connecting pipe, and the exhaust connecting pipe, respectively.

[0009] Furthermore, a second pressure regulating valve is provided on the exhaust branch pipe, and an oxygen sensor is connected to the second pressure regulating valve.

[0010] Furthermore, a filter is provided on the air outlet connecting pipe.

[0011] The nitrogen production device of the utility model has a small size, a compact structure, a high degree of integration, and adopts a modular design, which is easy to expand;

[0012] When the nitrogen making device of the utility model is in use, high-pressure air enters from the air inlet main pipe, enters the nitrogen making module through the air inlet branch pipe, the nitrogen making module separates nitrogen from the air, and the nitrogen enters the buffer tank through the air outlet branch pipe and the air outlet connecting pipe in sequence, and then enters the nitrogen storage tank or the occasion where high-pressure nitrogen is needed through the exhaust connecting pipe and the exhaust branch pipe. The nitrogen making device includes a plurality of nitrogen making modules. When one of the nitrogen making modules is fully absorbing oxygen, it can be switched to another nitrogen making module to carry out another group of nitrogen making, which effectively improves the nitrogen making efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. The drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a schematic diagram of a nitrogen production device of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the nitrogen production device of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the nitrogen production device of the utility model in another direction;

[0017] The markings in the figure are:

[0018] Base 1,

[0019] Nitrogen production module 2,

[0020] Intake main pipe 3, intake branch pipe 31, first pressure regulating valve 32,

[0021] Outlet connecting pipe 4, outlet branch pipe 41, filter 42,

[0022] Exhaust connecting pipe 5, exhaust branch pipe 51, flow detector 52, exhaust pipe 53, second pressure regulating valve 54, oxygen sensor 55,

[0023] Lower exhaust pipe 6, lower exhaust valve 61, muffler 62, air control valve 7. DETAILED DESCRIPTION

[0024] The above scheme is further described below in conjunction with specific examples. It should be understood that these examples are used to illustrate the utility model and are not limited to the scope of the utility model. The implementation conditions used in the examples can be further adjusted according to the conditions of the specific manufacturer, and the implementation conditions not specified are usually the conditions in conventional experiments.

[0025] See also Figures 1 to 3 As shown, a nitrogen making device comprises a base 1, a plurality of nitrogen making modules 2 arranged in parallel on the base 1, a plurality of air inlet branches 31 arranged on one side of the plurality of nitrogen making modules 2 and connected to the plurality of nitrogen making modules 2, an air inlet main pipe 3 connected to the plurality of air inlet branches 31, a plurality of air outlet branches 41 respectively connected to the plurality of nitrogen making modules 2, an air outlet connecting pipe 4 connected to the plurality of air outlet branches 41, a buffer tank (not shown) arranged outside the base 1, and a plurality of air inlet branches 31 connected to the plurality of air outlet branches 31. The other side of the nitrogen making module 2 is connected to the buffer tank with an exhaust connecting pipe 5, a plurality of exhaust branch pipes 51 connected to the exhaust connecting pipe 5, and a flow detector 52 arranged on the exhaust connecting pipe 5; a plurality of groups of the nitrogen making modules 2, a plurality of the intake branch pipes 31, and a plurality of the exhaust branch pipes 51 correspond one to one; a first pressure regulating valve 32 is arranged on the intake main pipe 3, and an air control valve 7 is respectively arranged on the intake branch pipe 31, the outlet branch pipe 41, the outlet connecting pipe 4, and the exhaust connecting pipe 5. When the nitrogen making device is in use, high-pressure air enters from the air inlet main pipe 3, enters the nitrogen making module 2 through the air inlet branch pipe 31, and the nitrogen making module 2 separates nitrogen from the air. The nitrogen enters the buffer tank through the air outlet branch pipe 41 and the air outlet connecting pipe 4 in sequence, and then enters the nitrogen storage tank or the occasion where high-pressure nitrogen is needed through the exhaust connecting pipe 5 and the exhaust branch pipe 51. The nitrogen making device includes a plurality of nitrogen making modules 2. When one of the nitrogen making modules 2 fully absorbs oxygen, it can be switched to another nitrogen making module 2 to perform another group of nitrogen making, which effectively improves the nitrogen making efficiency.

[0026] A lower exhaust pipe 6 is provided on one side of each nitrogen production module 2, and a lower exhaust valve 61 and a muffler 62 are provided on the lower exhaust pipe 6. The lower exhaust pipe 6 is used to discharge the residual gas during the switching process of the two groups of nitrogen production modules for the next use.

[0027] The upper part of the exhaust connecting pipe 5 is also connected to an exhaust pipe 53. The flow detector 52 is used to detect the flow of nitrogen entering the exhaust connecting pipe 5. If the nitrogen flow does not reach a preset range, it is directly discharged through the exhaust pipe 53.

[0028] The plurality of air inlet branches 31 are located below the plurality of air outlet branches 41. In this way, the high-pressure air can be fully contacted with the nitrogen production module 2, thereby increasing the amount of oxygen adsorbed during the nitrogen production process.

[0029] The exhaust branch pipe 51 is provided with a second pressure regulating valve 54 , and the second pressure regulating valve 54 is connected with an oxygen sensor 55 , which can detect the oxygen concentration of the gas in the exhaust branch pipe 51 . If the oxygen concentration exceeds a preset range, it is directly discharged through the exhaust pipe 53 .

[0030] The air outlet connecting pipe 4 is provided with a filter 42 .

[0031] The above examples are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A nitrogen production device, characterized in that: The invention comprises a base, a plurality of nitrogen making modules arranged in parallel on the base, a plurality of air inlet branches arranged on one side of the plurality of nitrogen making modules and connected to the plurality of nitrogen making modules respectively, an air inlet main pipe connected to the plurality of air inlet branches, a plurality of air outlet branches respectively connected to the plurality of nitrogen making modules, an air outlet connecting pipe connected to the plurality of air outlet branches, a buffer tank arranged on the outside of the base, an exhaust connecting pipe arranged on the other side of the plurality of nitrogen making modules and connected to the buffer tank, a plurality of exhaust branch pipes connected to the exhaust connecting pipe, and a flow detector arranged on the exhaust connecting pipe; the plurality of nitrogen making modules, the plurality of air inlet branches, and the plurality of exhaust branch pipes correspond to each other one by one.

2. The nitrogen generating device according to claim 1, characterized in that: A lower exhaust pipe is arranged on one side of each nitrogen production module, and a lower exhaust valve and a muffler are arranged on the lower exhaust pipe.

3. The nitrogen generating device according to claim 1, characterized in that: The upper portion of the exhaust connecting pipe is also connected with an exhaust pipe.

4. The nitrogen generating device according to claim 1, characterized in that: The plurality of air inlet branch pipes are located below the plurality of air outlet branch pipes.

5. The nitrogen generating device according to claim 1, characterized in that: The air intake main pipe is provided with a first pressure regulating valve, and the air intake branch pipe, the air outlet branch pipe, the air outlet connecting pipe, and the exhaust connecting pipe are respectively provided with air control valves.

6. The nitrogen generating device according to claim 1, characterized in that: The exhaust branch pipe is provided with a second pressure regulating valve, and the second pressure regulating valve is connected with an oxygen sensor.

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