Liquid nitrogen production equipment

Abstract

The utility model discloses liquid nitrogen production equipment which is characterized by further comprising a liquid nitrogen machine and a liquid nitrogen storage tank, wherein the liquid nitrogen machine is connected with a nitrogen buffer tank through a pipeline and is used for preparing nitrogen into liquid nitrogen; the liquid nitrogen storage tank is connected with the liquid nitrogen machine through a pipeline and is used for storing the liquid nitrogen; the control instrument is used for controlling the whole production equipment, the sampling pipe is arranged on a pipeline between the nitrogen buffer tank and the liquid nitrogen machine and used for sampling nitrogen, the sampling pipe is connected with a detector used for detecting the purity of the nitrogen, and the detector is connected with the control instrument. According to the utility model, the nitrogen is produced by the nitrogen production equipment, is conveyed into the nitrogen buffer tank and then is directly conveyed to the liquid nitrogen machine through the pipeline, and the nitrogen is directly produced into liquid nitrogen through the liquid nitrogen machine and then is conveyed to the liquid nitrogen storage tank, so that the liquid nitrogen is directly produced at one time; and the prepared nitrogen does not need to be stored in a nitrogen storage tank, conveyed to a liquid nitrogen machine and prepared into liquid nitrogen through the liquid nitrogen machine.

Description

Technical Field

[0001] The utility model relates to liquid nitrogen production, specifically to a production device for liquid nitrogen. Background Art

[0002] In the prior art, when producing liquid nitrogen, nitrogen is first produced by a nitrogen production device and then stored in a nitrogen storage tank. Then, the nitrogen storage tank storing nitrogen is moved to a liquid nitrogen machine, and the nitrogen is supplied to the liquid nitrogen machine. Then, the nitrogen is made into liquid nitrogen by the liquid nitrogen machine and stored in a liquid nitrogen storage tank. This method has some problems. Firstly, the transportation of the nitrogen storage tank is rather troublesome and the working efficiency is low. Secondly, if the purity of the produced nitrogen is insufficient, it will affect the subsequent use and use effect of the liquid nitrogen. If it is found that the nitrogen purity is insufficient when the nitrogen is supplied to the liquid nitrogen machine, then the stored nitrogen needs to be emptied, and then nitrogen with qualified purity is collected again, and then the nitrogen is transported to the liquid nitrogen machine and supplied to the liquid nitrogen machine. The whole production process is cumbersome and inefficient. Now, a production device that can produce nitrogen at one time and directly make nitrogen into liquid nitrogen is needed. Therefore, a production device for liquid nitrogen is proposed. Content of the Utility Model

[0003] The purpose of the utility model is to propose a production device for liquid nitrogen to solve the above problems.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A production device for liquid nitrogen, including an air compressor, a nitrogen production device connected to the air compressor through a pipeline, and a nitrogen buffer tank connected to the nitrogen production device through a pipeline; it is characterized in that it further includes a liquid nitrogen machine connected to the nitrogen buffer tank through a pipeline for making nitrogen into liquid nitrogen, and a liquid nitrogen storage tank connected to the liquid nitrogen machine through a pipeline for storing liquid nitrogen; it further includes a controller for controlling the whole production device and a sampling pipe arranged on the pipeline between the nitrogen buffer tank and the liquid nitrogen machine for sampling nitrogen. The sampling pipe is connected with a detector for detecting the purity of nitrogen, and the detector is connected with the controller.

[0005] Further preferably, it further includes a high-efficiency oil remover connected to the pipeline between the air compressor and the nitrogen production device, a precision filter connected to the high-efficiency oil remover through a pipeline, a heatless regeneration dryer connected to the precision filter through a pipeline, a dust fine filter connected to the heatless regeneration dryer through a pipeline, an activated carbon filter connected to the dust fine filter through a pipeline, and a buffer gas storage tank connected to the activated carbon filter through a pipeline and connected to the nitrogen production device through a pipeline.

[0006] Further preferably, it further includes a dust fine filter rack arranged between the nitrogen production device and the nitrogen buffer tank.

[0007] Further preferably, it further includes a blowdown pipeline connected to the nitrogen buffer tank, dust fine filter, buffer gas storage tank, activated carbon filter, precision filter and high-efficiency oil remover through pipelines.

[0008] Further preferably, it further includes an evacuation pipe arranged on the pipeline between the sampling pipe and the liquid nitrogen machine, and the evacuation pipe is further connected with a circulation pipe communicating with the pipelines between the buffer gas storage tank and the nitrogen production equipment.

[0009] Further preferably, it further includes a number of control valves arranged on the pipeline.

[0010] Advantages of the present utility model: After the nitrogen is produced by the nitrogen production equipment and transmitted to the nitrogen buffer tank, it is directly transmitted to the liquid nitrogen machine through the pipeline, and the liquid nitrogen machine directly makes the nitrogen into liquid nitrogen and then transmits it to the liquid nitrogen storage tank, directly producing liquid nitrogen at one time, without storing the produced nitrogen in the nitrogen storage tank and then transporting it to the liquid nitrogen machine and then making it into liquid nitrogen by the liquid nitrogen machine.

[0011] By arranging a sampling pipe on the pipeline connecting the nitrogen buffer tank and the liquid nitrogen machine, the nitrogen is sampled by the sampling pipe before being transmitted into the liquid nitrogen machine, and after sampling, it is transported to the detector. The purity of the nitrogen is detected by the detector. If the purity meets the standard, it is directly transmitted to the liquid nitrogen machine. If the detected nitrogen purity is insufficient, it is directly evacuated through the evacuation pipe or refluxed through the circulation pipe to the pipeline between the nitrogen gas storage tank and the nitrogen production equipment and re-produced by the nitrogen production equipment for secondary nitrogen production. The waste gas is circulated and refluxed for secondary nitrogen production, saving the gas treatment process before nitrogen production, saving energy consumption, reducing costs, and at the same time avoiding the nitrogen with insufficient purity being directly transmitted into the liquid nitrogen machine and making non-standard liquid nitrogen, affecting the subsequent use and effect of the liquid nitrogen. Description of the Drawings

[0012] Attached Figure 1 is a process flow schematic diagram of the present utility model.

[0013] Legend: 1, air compressor; 2, nitrogen buffer tank; 3, liquid nitrogen machine; 4, liquid nitrogen storage tank; 5, controller; 6, sampling pipe; 7, detector; 8, high-efficiency oil remover; 9, precision filter; 10, heatless regeneration dryer; 11, dust fine filter; 12, activated carbon filter; 13, buffer gas storage tank; 14, nitrogen production equipment; 15, blowdown pipeline; 16, evacuation pipe; 17, circulation pipe. Detailed Embodiments

[0014] Next, we will further explain a liquid nitrogen production equipment described in the present utility model with reference to the drawings.

[0015] It should be noted that all directional indications in the embodiments of the present utility model, such as up, down, left, right, front, back... are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture as shown in the attached drawings. If this specific posture changes, the directional indications will also change accordingly.

[0016] In the present utility model, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the connection inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0017] Refer to Figure 1 As shown in , a liquid nitrogen production device includes an air compressor 1, a nitrogen production device 14 connected to the air compressor 1 through a pipeline, and a nitrogen buffer tank 2 connected to the nitrogen production device 14 through a pipeline. It is characterized in that it further includes a liquid nitrogen machine 3 connected to the nitrogen buffer tank 2 through a pipeline for making nitrogen into liquid nitrogen, and a liquid nitrogen storage tank 4 connected to the liquid nitrogen machine 3 through a pipeline for storing liquid nitrogen. It also includes a controller 5 for controlling the entire production device and a sampling pipe 6 provided on the pipeline between the nitrogen buffer tank 2 and the liquid nitrogen machine 3 for sampling nitrogen. The sampling pipe 6 is connected to a detector 7 for detecting the purity of nitrogen, and the detector 7 is connected to the controller 5.

[0018] After the nitrogen is produced in the nitrogen production device 14 and transmitted into the nitrogen buffer tank 2, it is directly transmitted to the liquid nitrogen machine 3 through a pipeline. The liquid nitrogen machine 3 directly makes the nitrogen into liquid nitrogen and then transmits it to the liquid nitrogen storage tank 4, directly producing liquid nitrogen at one time, without storing the produced nitrogen in a nitrogen storage tank and then transporting it to the liquid nitrogen machine 3 and then making it into liquid nitrogen by the liquid nitrogen machine 3.

[0019] By setting a sampling pipe 6 on the pipeline connecting the nitrogen buffer tank 2 and the liquid nitrogen machine 3, nitrogen is sampled through the sampling pipe 6 before being transmitted into the liquid nitrogen machine 3. After sampling, it is transported to the detector 7, and the purity of nitrogen is detected by the detector 7. If the purity meets the standard, it is directly transmitted to the liquid nitrogen machine 3. If the detected nitrogen purity is insufficient, it is directly emptied through the exhaust pipe 16 or refluxed through the circulation pipe 17 to the pipeline between the nitrogen storage tank and the nitrogen production device 14 to be re-produced by the nitrogen production device 14 for secondary nitrogen production. At the same time, it avoids directly transporting nitrogen with insufficient purity into the liquid nitrogen machine 3 to make liquid nitrogen that does not meet the standard, affecting the subsequent use and effect of the liquid nitrogen.

[0020] In one embodiment, it further includes an efficient oil separator 8 connected to the pipeline between the air compressor 1 and the nitrogen production equipment 14, a precision filter 9 connected to the efficient oil separator 8 through a pipeline, a heatless regenerative dryer 10 connected to the precision filter 9 through a pipeline, a fine dust filter 11 connected to the heatless regenerative dryer 10 through a pipeline, an activated carbon filter 12 connected to the fine dust filter 11 through a pipeline, and a buffer gas storage tank 13 connected to the activated carbon filter 12 through a pipeline and also connected to the nitrogen production equipment 14 through a pipeline.

[0021] In one embodiment, it further includes a fine dust filter 11 provided between the nitrogen production equipment 14 and the nitrogen buffer tank 2.

[0022] In one embodiment, it further includes a sewage discharge pipeline 15 connected to the nitrogen buffer tank 2, the fine dust filter 11, the buffer gas storage tank 13, the activated carbon filter 12, the precision filter 9, and the efficient oil separator 8 through pipelines. The sewage discharge pipe is used for discharging waste and waste gas.

[0023] In one embodiment, it further includes an evacuation pipe 16 provided on the pipeline between the sampling pipe 6 and the liquid nitrogen machine 3. The evacuation pipe 16 is further connected to a circulation pipe 17 that communicates with the pipeline between the buffer gas storage tank 13 and the nitrogen production equipment 14;

[0024] By providing a sampling pipe 6 on the pipeline connecting the nitrogen buffer tank 2 and the liquid nitrogen machine 3, the nitrogen is sampled through the sampling pipe 6 before being transmitted into the liquid nitrogen machine 3. After sampling, it is transported to the detector 7, and the purity of the nitrogen is detected by the detector 7. If the purity meets the standard, it is directly transported to the liquid nitrogen machine 3. If the detected nitrogen purity is insufficient, it is directly evacuated through the evacuation pipe 16 or returned through the circulation pipe 17 to the pipeline between the nitrogen gas storage tank and the nitrogen production equipment 14 to be re-produced by the nitrogen production equipment 14 for secondary nitrogen production. The waste gas is circulated and returned for secondary nitrogen production, saving the gas treatment processes of the pre-nitrogen production air compressor 1, efficient oil separator 8, precision filter 9, heatless regenerative dryer 10, fine dust filter 11, and activated carbon filter, saving energy consumption, and reducing costs.

[0025] In one embodiment, it further includes a number of control valves provided on the pipeline. The control valves may include manual valves that can be manually controlled and adjusted by an operator or electric valves, pneumatic valves, etc. automatically controlled by the controller 5.

[0026] When the utility model is in use: the air extracted by the air compressor 1 first passes through the high-efficiency oil separator 8 for oil removal, then passes through the precision filter 9 for primary filtration, and then the air is dried by the heatless regeneration dryer 10. The dried gas then passes through the dust fine filter 11 and the activated carbon filter 12 for multi-stage filtration. Finally, the processed gas is stored in the buffer gas storage tank 13, and then supplied to the nitrogen production equipment 14 through the buffer gas storage tank 13 for nitrogen production. The nitrogen produced by the nitrogen production equipment 14 is transported to the nitrogen buffer tank 2 through a pipeline. The nitrogen buffer tank 2 then transports the nitrogen to the liquid nitrogen machine 3 through a pipeline. After the liquid nitrogen is produced by the liquid nitrogen machine 3, it is stored in the liquid nitrogen tank;

[0027] During the process of the nitrogen buffer tank 2 transporting nitrogen to the liquid nitrogen machine 3, the nitrogen is sampled through the sampling pipe 6, and the sampled nitrogen is transported to the detector 7 through a pipeline. The purity of the nitrogen is detected by the detector 7, and the detected data is sent to the controller 5. If the purity of the nitrogen meets the standard, the corresponding control valve is controlled to open, and the nitrogen is introduced into the liquid nitrogen machine 3;

[0028] If the purity of the nitrogen is insufficient, the corresponding control valve is controlled to open, and the nitrogen is directly emptied or refluxed through the exhaust pipe 16 and the circulation pipe 17 to the nitrogen production equipment 14 for secondary nitrogen production to improve the purity of the nitrogen.

[0029] The protection scope of the utility model is not limited to the above embodiments and their transformations. Conventional modifications and replacements made by those skilled in the art based on the content of this embodiment all fall within the protection scope of the utility model.

Claims

1. A liquid nitrogen production device, comprising an air compressor (1), a nitrogen generator (14) connected to the air compressor (1) via a pipeline, and a nitrogen buffer tank (2) connected to the nitrogen generator (14) via a pipeline; wherein: The invention also includes a liquid nitrogen machine (3) connected to the nitrogen buffer tank (2) through a pipeline for converting nitrogen into liquid nitrogen, and a liquid nitrogen storage tank (4) connected to the liquid nitrogen machine (3) through a pipeline for storing liquid nitrogen; and also includes a controller (5) for controlling the entire production equipment and a sampling tube (6) arranged on the pipeline between the nitrogen buffer tank (2) and the liquid nitrogen machine (3) for sampling nitrogen, wherein the sampling tube (6) is connected to a detector (7) for detecting the purity of nitrogen, and the detector (7) is connected to the controller (5).

2. The liquid nitrogen production equipment according to claim 1, characterized in that: The invention also includes a high-efficiency oil remover (8) connected to the pipeline between the air compressor (1) and the nitrogen generator (14), a precision filter (9) connected to the high-efficiency oil remover (8) through a pipeline, a heatless regeneration dryer (10) connected to the precision filter (9) through a pipeline, a dust fine filter (11) connected to the heatless regeneration dryer (10) through a pipeline, an activated carbon filter (12) connected to the dust fine filter (11) through a pipeline, and a buffer gas storage tank (13) connected to the activated carbon filter (12) through a pipeline and connected to the nitrogen generator (14) through a pipeline.

3. The liquid nitrogen production equipment according to claim 1, characterized in that: It also includes a dust fine filter (11) arranged between the nitrogen production equipment (14) and the nitrogen buffer tank (2).

4. The liquid nitrogen production equipment according to claim 3, characterized in that: It also includes a sewage discharge pipeline (15) connected to the nitrogen buffer tank (2), the dust fine filter (11), the buffer gas storage tank (13), the activated carbon filter (12), the precision filter (9) and the high-efficiency oil remover (8) through pipelines.

5. The liquid nitrogen production equipment according to claim 2, characterized in that: The apparatus further comprises an exhaust pipe (16) provided on the pipeline between the sampling pipe (6) and the liquid nitrogen machine (3), wherein the exhaust pipe (16) is further connected to a circulation pipe (17) which is in communication with the pipeline between the buffer gas storage tank (13) and the nitrogen generating equipment (14).

6. A liquid nitrogen production equipment according to any one of claims 1 to 5, characterized in that: It also includes several control valves arranged on the pipeline.

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