Waste nitrogen treatment device of air separation tower

Abstract

The utility model provides a waste nitrogen treatment device for an air separation tower, which relates to the field of air separation equipment, and comprises a cold box, a silencer and an expansion machine fan, the expansion machine fan is connected with the silencer through a main heat exchanger, the silencer is connected with the cold box, the cold box is connected with a waste nitrogen pipeline at a waste nitrogen outlet, and the waste nitrogen pipeline is connected with the main heat exchanger. The waste nitrogen pipeline is connected with an expansion machine fan, so that waste nitrogen is emptied along with clean air; noise reduction and emission of waste nitrogen can be achieved through the silencer, waste nitrogen waste gas discharged out of the cold box is connected with the expansion machine draught fan through the waste nitrogen pipeline, the waste nitrogen waste gas of the cold box is led out of the expansion machine draught fan end, the waste nitrogen waste gas and clean air are silenced together and then emptied, and rapid and efficient treatment of the waste nitrogen is achieved.

Description

Technical Field

[0001] This utility model relates to the field of air separation equipment, and in particular to a waste nitrogen treatment device for an air separation tower. Background Technology

[0002] Air separation technology plays a vital role in modern industry, especially in sectors such as chemical, steel, electronics, and medical, where there is a widespread demand for high-purity gases such as oxygen, nitrogen, and argon. Self-drying air separation towers, as key equipment in the air separation process, can efficiently separate various components in the air and achieve self-drying to ensure the purity and quality of the produced gas.

[0003] Air separation technology uses specific processes to separate and purify components such as oxygen, nitrogen, and argon from the air to meet the widespread demand for high-purity gases in modern industry. These high-purity gases play an irreplaceable role in many industries, including chemical, steel, electronics, and medical. For example, in the steel industry, high-purity oxygen is used to improve combustion efficiency and facilitate the smooth progress of the smelting process; in the electronics industry, high-purity nitrogen is used to create a protective atmosphere, prevent oxidation of sensitive components such as chips, and ensure product quality and stability.

[0004] Air separation towers, as key equipment in the air separation process, efficiently separate various components from the air and dry themselves to ensure the purity and quality of the produced gas. In air separation towers, nitrogen primarily originates from the cold box. However, the high-oxygen-content contaminated nitrogen in the cold box presents a problem that requires proper handling. Direct utilization of this contaminated nitrogen may lead to decreased operating efficiency and increased safety hazards in the air separation unit; direct discharge, on the other hand, increases costs and wastes resources.

[0005] Therefore, for the high-oxygen-content waste nitrogen in the cold box, appropriate treatment measures need to be taken, such as reducing its oxygen content through purification and regeneration to meet the standards for reuse, or making rational use of these resources through other means to reduce waste and lower costs. Summary of the Invention

[0006] This invention addresses the shortcomings of existing technologies by providing an air separation tower nitrogen treatment device that mixes nitrogen waste gas with clean air before venting it for treatment.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An air separation tower waste nitrogen treatment device includes a cold box, an air filter and an expander fan. The cold box is connected to a waste nitrogen pipeline at the waste nitrogen outlet, and the expander fan is connected to the air filter.

[0009] The waste nitrogen pipeline is connected to the air filter. The waste nitrogen mixed air is drawn away by the expander fan, passes through the silencer, and is then released into the air.

[0010] The air filter is installed on one side of the cold box, and the air filter is equipped with an air duct to filter the air used for mixing polluted nitrogen.

[0011] The air duct is supported by a support structure to maintain stability.

[0012] Preferably, the support structure includes a support base and a base, the base being mounted on the support base and contacting the air duct for support.

[0013] Preferably, the support base is height-adjustable, and the bottom surface is configured as an arc to partially enclose the gas pipeline support.

[0014] Preferably, the support base includes a base, a support sleeve, and an external threaded rod. The support sleeve is rotatably mounted on the base, and the external threaded rod is partially inserted into the support sleeve and threadedly connected to it. The base and the external threaded rod are fixedly set, and rotating the support sleeve controls the vertical movement of the external threaded rod.

[0015] Preferably, multiple base supports are provided, and adjacent base supports can be magnetically connected.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This utility model provides a waste nitrogen treatment device for an air separation tower. The waste nitrogen exhaust gas from the cold box is connected to the expander fan through a waste nitrogen pipeline. The waste nitrogen exhaust gas from the cold box is led out at the expander fan end, and the waste nitrogen exhaust gas is mixed with clean air, silenced, and then released into the air, thus achieving rapid and efficient treatment of waste nitrogen.

[0018] The expander fan in this application is used to drive the mixing of waste nitrogen and clean air, and the mixture is discharged through a silencer. Direct discharge of waste nitrogen may lead to localized oxygen enrichment, posing a safety hazard. This device ensures that the exhaust gas is always within a safe range by controlling the proportion of clean air mixed.

[0019] This utility model incorporates a support structure at the connection between the waste nitrogen pipeline and the air pipeline to support gas flow, ensure pipeline stability, and reduce loosening and abnormal noise. Furthermore, since the waste nitrogen pipeline and the air pipeline are connected before reaching the expander fan, the support structure of this application also provides support for the expander fan. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall process structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the connection structure between the nitrogen waste pipe and the air pipe of this utility model;

[0023] Figure 3 This is a schematic diagram of the support structure of this utility model;

[0024] Figure 4 This is a schematic diagram of the support structure with multiple base supports of this utility model.

[0025] Drawing number explanation: 1. Cold box; 2. Air filter; 3. Expander fan; 4. Sludge and nitrogen pipeline; 5. Air pipeline; 6. Support structure; 7. Support base; 71. Base; 72. Support sleeve; 73. External threaded support rod; 8. Base support; 9. Silencer. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings.

[0027] The following description is intended to disclose the present invention and to enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the present invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0028] Those skilled in the art should understand that, in the disclosure of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0029] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0030] Please see Figure 1 - Figure 4 This utility model provides a waste nitrogen treatment device for an air separation tower, including a cold box 1, an air filter 2, and an expander fan 3. The cold box 1 is connected to a waste nitrogen pipe 4 at the waste nitrogen outlet. The expander fan 3 is connected to the air filter 2, and the waste nitrogen pipe 4 is connected to the air filter 2. The waste nitrogen mixed air is drawn away by the expander fan 3, passes through a silencer 9, and is then released into the air.

[0031] Connect the waste nitrogen pipe 4 to the waste nitrogen outlet of the cold box 1, connect the expander fan 3 to the silencer 9, install the air pipe 5 on the expander fan 3, connect the waste nitrogen pipe 4 and the air pipe 5, and release the waste nitrogen mixed with clean air through the silencer 9.

[0032] Among them, polluted nitrogen refers to nitrogen gas with high oxygen content. High oxygen content may lead to a decrease in the operating efficiency of the air separation unit and an increase in safety hazards.

[0033] In this application, the waste nitrogen exhaust gas from the cold box 1 is mixed with clean air for treatment. The waste nitrogen exhaust gas from the cold box 1 is drawn out by the blower 3 of the expander, and the waste nitrogen exhaust gas passes through the silencer 9 along with the clean air before being released into the air, thereby achieving efficient and convenient waste nitrogen treatment.

[0034] Furthermore, a waste nitrogen pipe 4 is installed on the cold box 1, and the waste nitrogen pipe 4 is connected to the air pipe 5 of the expander fan 3. A support structure 6 is installed on the side of the cold box 1 to support the air pipe 5 and the waste nitrogen pipe 4 to maintain their stable delivery.

[0035] In the specific implementation process, the mixing ratio of waste nitrogen pipeline 4 and air pipeline 5 is adjusted by the flow valve to ensure that waste nitrogen and clean air are mixed at a ratio of 1:1 to 1:3, thereby reducing the oxygen content of the exhaust gas by more than 25%.

[0036] Preferably, the oxygen content sensor in the device is linked to the control system to optimize the mixing ratio in real time.

[0037] The support structure 6 consists of a support base 7 and a base 8. The base 8 is mounted on the support base 7 and is supported by the support base 7, which in turn supports the air duct 5. The support base 7 is height-adjustable, and the surface of the base 8 is designed to be curved to provide a wrapping effect on the air duct 5, resulting in greater stability.

[0038] The support base 7 is adjustable by combining a base 71, a support sleeve 72, and an external threaded rod 73. The base 71 is fixed to the ground or platform, the support sleeve 72 is rotatably installed on the base 71, and the external threaded rod 73 is threaded into the support sleeve 72. The top of the external threaded rod 73 is fixed to the base 8. The height of the external threaded rod 73 can be adjusted by simply rotating the support sleeve 72.

[0039] In addition, in some embodiments, in order to extend the support range, multiple base supports 8 are provided. Adjacent base supports 8 are connected by magnetic attraction. Multiple base supports 8 can share a support base 7, or each base support 8 can be equipped with a support base 7.

[0040] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the principles, the implementation of the present invention may have any changes or modifications.

Claims

1. An air separation column contaminated nitrogen treatment apparatus, characterized by: It includes a cold box (1), an air filter (2) and an expander fan (3). The cold box (1) is connected to a nitrogen pipe (4) at the nitrogen outlet. The expander fan (3) is connected to the air filter (2). The waste nitrogen pipe (4) is connected to the air filter (2). The waste nitrogen mixed air is drawn away by the expander fan (3), passes through the silencer (9), and is then released into the air.

2. The air separation tower nitrogen treatment device according to claim 1, characterized in that: The air filter (2) is installed on one side of the cold box (1), and the air filter (2) is provided with an air duct (5) to filter the air used for mixing polluted nitrogen.

3. The air separation tower nitrogen treatment device according to claim 2, characterized in that: The air duct (5) is supported by the support structure (6) to maintain stability.

4. The air separation tower nitrogen treatment device according to claim 3, characterized in that: The support structure (6) includes a support base (7) and a base (8). The base (8) is installed on the support base (7) and is in contact with the air duct (5) for support.

5. The air separation tower nitrogen treatment device according to claim 4, characterized in that: The support base (7) is height adjustable, and the surface of the base (8) is set to be arc-shaped to form a semi-enclosed support for the air duct (5).

6. The air separation tower nitrogen treatment device according to claim 5, characterized in that: The support base (7) includes a base (71), a support sleeve (72), and an external threaded rod (73). The support sleeve (72) is rotatably mounted on the base (71). The external threaded rod (73) is partially inserted into the support sleeve (72) and threadedly connected to it. The base (71) and the external threaded rod (73) are fixedly set. Rotating the support sleeve (72) controls the vertical movement of the external threaded rod (73).

7. The air separation tower nitrogen treatment device according to claim 6, characterized in that: Multiple bases (8) are provided, and adjacent bases (8) can be magnetically connected.

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