Fractionating tower sealing gas supply device

Abstract

The utility model discloses a sealing gas supply device for a fractionating tower, which relates to the field of technical equipment and can be used for filling nitrogen into the outer wall of the fractionating tower, so that the air pressure inside the outer wall of the fractionating tower is greater than the atmospheric pressure outside the outer wall of the fractionating tower and wet air is prevented from entering a shell and freezing at a low-temperature part of a cold box. Normal operation of devices in the fractionating tower is influenced. The device comprises a fractionating tower outer wall and a gas supply device arranged on the fractionating tower outer wall, the gas supply device comprises a plurality of gas supply units, each gas supply unit is provided with a gas supply pipeline and a gas supply control device, and a processing control unit, a power supply, a pressure sensor, a motor and the like are arranged in each gas supply control device. The pressure sensor and the air inlet branch valve are arranged on the air supply pipeline, the motor is installed in the shell and connected with the air inlet branch valve, the processing control unit is electrically connected with the pressure sensor and the motor, and the processing control unit controls the motor to work according to the numerical value change of the pressure sensor so that the air inlet branch valve can be opened or closed.

Description

TECHNICAL FIELD

[0001] The utility model relates to air separation technical equipment field especially relates to a fractionating column sealing gas supply device. BACKGROUND

[0002] The nitrogen-oxygen fractionating column is a device for separating nitrogen (N2) and oxygen (O2) in air, usually used for industrial-scale gas production. This process is based on the principle of air liquefaction and cryogenic distillation, that is, by cooling the air to extremely low temperature (usually close to -196℃) to form liquid air, and then separating oxygen and nitrogen by using their different boiling points. The core principle of the nitrogen-oxygen fractionating column is distillation, that is, by using the boiling point difference of different components in the mixture, through repeated evaporation and condensation process to realize separation. In air, the boiling point of nitrogen is -195.8℃, while the boiling point of oxygen is -183℃, the difference in boiling point provides the basis for their separation.

[0003] The fractionating column includes an outer shell and a pipeline and various instruments arranged inside the outer shell, and the gap between the outer shell and the pipeline and the container is filled with thermal insulation material perlite, but the thermal insulation material is not airtight, the outside humid air can be sucked in, and ice can be formed at low temperature, especially near the cold box, which can bring many adverse effects such as energy loss, equipment damage, safety hazards, process condition out of control, environmental impact and economic loss, etc. SUMMARY

[0004] In view of the above shortcomings, the utility model provides a fractionating column sealing gas supply device, which can fill nitrogen into the outer shell, so that the atmospheric pressure inside the outer shell is greater than that outside the outer shell, preventing humid air from entering the outer shell and freezing at the low temperature of the cold box, affecting the normal operation of the device in the fractionating column.

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

[0006] A fractionating column sealing gas supply device, comprising a fractionating column outer wall and a gas supply device arranged on the fractionating column outer wall, the gas supply device comprising a plurality of gas supply units, characterized in that: each gas supply unit is provided with a gas supply pipeline and a gas supply control device, the gas supply control device comprising an outer shell, a processing control unit, a power supply, an inlet valve, a pressure sensor and a motor, the outer shell being arranged on the fractionating column outer wall and covering the remaining parts inside, the gas supply pipeline passing through the outer shell, the pressure sensor and the inlet valve being arranged on the gas supply pipeline, the motor being installed in the outer shell and connected with the inlet valve, the processing control unit being electrically connected with the pressure sensor and the motor, and the processing control unit controlling the motor to work to make the inlet valve open or close according to the value change of the pressure sensor.

[0007] Preferably, the connecting pipeline is arranged on the gas supply pipeline and is located at the air inlet end of the gas supply control device.

[0008] Preferably, the connecting pipeline is arranged on the gas supply pipeline and is located at the air inlet end of the gas supply control device.

[0009] Preferably, the shell comprises a side wall, a bottom plate and a cover plate, the bottom plate is arranged at the bottom of the side wall, the bottom plate is fixed to the outer wall of the fractionating tower, the power supply and the processing control unit are mounted on the bottom plate, the motor is mounted on the side wall, and the cover plate is detachably mounted on the side wall.

[0010] Preferably, the air inlet main pipeline is further provided with an air inlet main valve.

[0011] Preferably, the outer wall of the fractionating tower comprises an outer wall body and a plurality of connecting pieces, the connecting pieces are uniformly arranged on the outer wall body from bottom to top, and the plurality of connecting pieces communicate the outside and the inside of the outer wall body; the gas supply pipeline comprises an exhaust pipeline and an air inlet sub-pipeline, the air inlet sub-pipeline is mounted on the side of the connecting piece located outside the outer wall body, and the exhaust pipeline is mounted on the side of the connecting piece located inside the outer wall body and surrounds the outer wall body.

[0012] Preferably, the exhaust pipeline is provided with a plurality of exhaust holes which are uniformly arranged on the exhaust pipeline.

[0013] Preferably, the shell further comprises a plurality of supporting pieces which are arranged around the outer wall body and are used for supporting the exhaust pipeline.

[0014] Preferably, the exhaust pipelines in the plurality of gas supply units are uniformly arranged on the outer wall of the fractionating tower from bottom to top, and the distance between the two nearest exhaust pipelines is five meters.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] 1. By maintaining the air pressure inside the outer wall of the fractionating tower to be higher than the atmospheric pressure outside, the device effectively prevents the entry of external air and water vapor, thereby avoiding the formation of ice at cold spots, which helps to improve the working efficiency and service life of the fractionating tower. The arrangement of the plurality of gas supply units can meet the gas demand at different positions inside the outer wall of the fractionating tower, ensure the uniform distribution of the gas in the outer wall of the fractionating tower, and prevent the absorption of external humid air due to uneven air pressure. At the same time, the combination of the pressure sensor and the processing control unit in the gas supply control device can monitor the gas pressure in real time and automatically adjust the opening and closing of the air inlet sub-valve, maintain the stability of the gas supply, and thus ensure that the air pressure inside the outer wall of the fractionating tower has a positive pressure of 200 Pa-500 Pa.

[0017] 2. The arrangement of the air intake main pipeline and the air intake main valve makes the overall supply of gas more efficient, facilitates centralized management and control, can be quickly closed when gas supply is not needed, and reduces energy consumption. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0020] Figure 2 It is a top view of the present application.

[0021] Figure 3 It is a schematic diagram of the pipeline arrangement structure in the present application.

[0022] Figure 4 It is a schematic diagram of the structure of the outer wall of the fractionating tower in the present application.

[0023] Figure 5 It is a schematic diagram of the structure of a single gas supply unit in the present application.

[0024] Figure 6 It is a schematic diagram of the internal structure of the gas supply control device in the present application.

[0025] Figure 7 It is a schematic diagram of the internal structure of the gas supply control device in the present application. Figure 5

[0026] Reference signs: 1, outer wall of the fractionating tower; 100, outer wall body; 101, connecting piece; 2, air intake main pipeline; 3, air intake main valve; 4, connecting pipeline; 5, gas supply control device; 500, side wall; 501, bottom plate; 502, cover plate; 503, processing control unit; 504, power supply; 505, air intake sub-valve; 506, pressure sensor; 507, motor; 6, air intake sub-pipeline; 7, exhaust pipeline; 8, supporting piece. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0028] ​In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element indicated must have a particular orientation, a particular orientation and operation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0029] In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element indicated must have a particular orientation, a particular orientation and operation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0030] As Figures 1-7 The utility model discloses a fractionating tower sealing gas supply device, including fractionating tower outer wall 1 and the gas supply device of setting on fractionating tower outer wall 1, and the gas supply device is used to provide the gas supply of proper amount in the working process of fractionating tower, and the gas supplied is usually nitrogen, so that the internal gas pressure of fractionating tower outer wall 1 is greater than the atmospheric pressure outside, prevents air from being sucked into fractionating tower outer wall 1 avoids the water vapor in air to enter fractionating tower outer wall 1 in cold point and freezes, influences the working efficiency and service life of internal device, ensures the safe and efficient operation of fractionating tower system in fractionating tower outer wall 1.

[0031] The gas supply device includes a plurality of gas supply units, and the arrangement of the plurality of gas supply units of the gas supply device can effectively meet the gas demand of different positions of the fractionating tower. Each gas supply unit is provided with an independent gas supply pipeline and a gas supply control device 5. These gas supply units are arranged along the fractionating tower outer wall 1, so that the gas can uniformly enter different areas of the fractionating tower outer wall 1, and the uniform distribution of the gas in the fractionating tower outer wall 1 is ensured to prevent air from being sucked into the fractionating tower outer wall 1 due to different gas pressures in different parts.

[0032] Each gas supply unit is provided with a gas supply pipeline and a gas supply control device 5, which includes a shell, a processing control unit 503, a power supply 504, an inlet valve 505, a pressure sensor 506 and a motor 507. The shell is mounted on the outer wall 1 of the fractionating tower to protect the power supply 504, the pressure sensor 506, the motor 507 and the inlet valve 505 from the influence of the external environment. The gas supply pipeline passes through the shell and is directly connected to the inside of the fractionating tower to ensure smooth entry of the gas from the gas supply unit into the fractionating tower. The pressure sensor 506 and the inlet valve 505 are both mounted on the gas supply pipeline, wherein the pressure sensor 506 is used to monitor the gas pressure in the pipeline in real time and feed back the detected pressure value to the processing control unit 503. The motor 507 in the gas supply control device 5 is mounted inside the shell and is directly connected to the inlet valve 505.

[0033] When the motor 507 receives the instruction from the processing control unit 503, it drives the opening or closing of the inlet valve 505 to control the flow of the gas into the fractionating tower. The processing control unit 503 is connected to the pressure sensor 506 and the motor 507, can receive the real-time pressure data fed back by the pressure sensor 506, and can determine whether the opening or closing state of the inlet valve 505 needs to be adjusted according to the pressure change. When the pressure sensor 506 detects that the gas pressure exceeds or does not reach the preset range, the processing control unit 503 will start the motor 507 to adjust the opening or closing of the inlet valve 505, so as to stabilize the gas supply and ensure that the gas pressure in the outer wall 1 of the fractionating tower has a positive pressure of 200-500 Pa.

[0034] In a preferred fractionating tower sealing gas supply device, a connecting pipeline 4 is further included to connect multiple gas supply units, and the connecting pipeline 4 is arranged on the gas supply pipeline and located at the gas inlet end of the gas supply control device 5. This enables smooth flow when multiple gas supply units share the gas inlet resource, and facilitates centralized management of the multiple gas supply units.

[0035] In a preferred fractionating tower sealing gas supply device, an inlet main pipeline 2 is further arranged, and an inlet main valve 3 is further arranged on the inlet main pipeline 2 to better manage and control the overall supply of the gas. When the gas supply device does not need to work, the entire gas supply system can be closed by operating the inlet main valve 3. The gas outlet end of the inlet main pipeline 2 is connected to the connecting pipeline 4 to realize centralized delivery of the gas. The inlet main pipeline 2 serves as the main gas pipeline of the entire fractionating tower sealing gas supply device, and communicates the gas source with each gas supply unit to provide a stable and unified gas source for the gas supply units. The connecting pipeline 4, the gas supply pipeline and the inlet main pipeline 2 are connected by a tee joint.

[0036] In a preferred fractionating column sealing gas supply device, the outer shell is composed of a side wall 500, a bottom plate 501 and a cover plate 502, wherein the bottom plate 501 is located at the bottom of the side wall 500 and is firmly connected to the outer wall of the fractionating column through a fixing device, ensuring the stability and firmness of the outer shell. The bottom plate 501 is the basic support surface of the gas supply device, and the power supply 504 and the processing control unit 503 are installed on the bottom plate 501, so that these core components can operate stably, while ensuring the power supply and control functions of the system. The side wall 500 serves as the main support structure of the outer shell and is fixed with the bottom plate 501. The motor 507 is installed on the side wall 500, facilitating the transmission of force by the side wall 500. The cover plate 502 is installed on the side wall 500 through a detachable design, so that the operator can easily remove the cover plate 502 when needed for maintenance, repair or component replacement. This design not only facilitates the installation and debugging of the device, but also significantly improves the efficiency of daily maintenance. When it is necessary to detect or repair the internal components such as the power supply 504, the processing control unit 503 and the motor 507, the cover plate 502 can be removed to easily access the internal equipment, reducing the difficulty and time cost of equipment maintenance. This shell design not only provides good protection, but also achieves effective sealing to prevent dust, moisture or other contaminants in the external environment from entering and affecting the normal operation of the internal equipment.

[0037] In a preferred fractionating column sealing gas supply device, the outer wall 1 of the fractionating column includes an outer wall body 100 and a connecting piece 101, which are used to realize efficient transmission and sealing of the gas inside the outer wall 1 of the fractionating column. The connecting piece 101 is designed as a pipe with flanges at both ends, which provides a standardized connection interface for the ends of the pipe to ensure airtight connection with other components and reduce the possibility of gas leakage. The connecting piece 101 is fixed to the outer wall body 100 and connects the inner space of the outer wall, providing a stable connection interface for the external gas pipe. The exhaust pipe 7 is designed with a flange at one end away from the main gas inlet valve, which matches the flange of the connecting piece 101. By flange connection, the exhaust pipe 7 is stably connected inside the outer wall body 100, realizing the control and discharge of the gas flow inside and outside the fractionating column. The gas inlet sub-pipe 6 is installed on the side of the connecting piece 101 outside the outer wall body 100 through the flange, forming an external gas inlet interface to ensure that external gas can enter the fractionating column through the connecting piece 101. This double-flange design not only makes the installation more stable, but also facilitates the disassembly and reinstallation of the operator during maintenance, improving the maintenance efficiency of the equipment. The overall profile of the exhaust pipe 7 is similar to that of the outer wall of the fractionating column, and is arranged in a surrounding manner inside the outer wall body 100, closely following the outer wall structure of the fractionating column. This ring-shaped exhaust pipe 7 layout makes full use of the internal space of the fractionating column, improving the efficiency of gas transmission. The gas inlet end of the exhaust pipe 7 is also provided with a flange, which matches the inner flange of the connecting piece 101, so that the exhaust pipe 7 can be stably installed at the connecting piece 101 through the flange. The flange connection ensures the stability and airtightness of the connection between the exhaust pipe 7 and the outer wall 1 of the fractionating column, effectively preventing gas leakage.

[0038] In a preferred fractionating column sealing gas supply device, a plurality of exhaust holes are designed on the exhaust pipe 7, which are uniformly arranged on the surface of the exhaust pipe 7 to ensure the stability and uniformity of the gas during the discharge process. The uniform distribution of exhaust holes helps the effective diffusion of gas, making the exhaust process more smooth.

[0039] In a preferred fractionating column sealing gas supply device, a plurality of support pieces 8 are also included, which are firmly fixed to the outer wall body 100 and mainly used to support the exhaust pipe 7. The arrangement of this support structure not only improves the stability of the exhaust pipe 7, but also effectively reduces the risk of vibration and deformation caused by the weight of the pipe and the change of gas flow pressure.

[0040] In a preferred fractionating column sealing gas supply device, the exhaust pipes 7 in the plurality of gas supply units are uniformly arranged on the outer wall body 100 from bottom to top, and the distance between two closest exhaust pipes 7 is preferably five meters, too close leading to cost increase, and too loose possibly leading to uneven pressure in each part of the outer wall body 100, thereby leading to the absorption of external humid air into the outer wall body 100.

[0041] The above merely describes the specific implementation of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A fractionating column seal gas supply device comprising a fractionating column outer wall (1) and a gas supply device provided on the fractionating column outer wall (1), the gas supply device comprising a plurality of gas supply units, characterized in that: Each of the gas supply units is provided with a gas supply pipeline and a gas supply control device (5), the gas supply control device (5) comprising a shell, a processing control unit (503), a power supply (504), an air inlet sub-valve (505), a pressure sensor (506) and a motor (507), the shell being arranged on the outer wall (1) of the fractionating tower and covering the remaining components inside, the gas supply pipeline penetrating through the shell, the pressure sensor (506) and the air inlet sub-valve (505) being arranged on the gas supply pipeline, the motor (507) being installed in the shell and connected with the air inlet sub-valve (505), the processing control unit (503) being electrically connected with the pressure sensor (506) and the motor (507), the processing control unit (503) controlling the motor (507) to work according to the value change of the pressure sensor (506) so as to open or close the air inlet sub-valve (505).

2. A fractionating column seal gas supply apparatus according to claim 1, characterized by: Further comprising a connecting pipeline (4) for connecting a plurality of the gas supply units, the connecting pipeline (4) being arranged on the gas supply pipeline and located at the air inlet end of the gas supply control device (5).

3. A fractionating column seal gas supply apparatus according to claim 2, wherein: Further comprising an air inlet main pipeline (2), the air outlet end of the air inlet main pipeline (2) being connected with the connecting pipeline (4).

4. A fractionating column seal gas supply apparatus according to claim 1, wherein: The shell comprises a side wall (500), a bottom plate (501) and a cover plate (502), the bottom plate (501) being arranged at the bottom of the side wall (500), the bottom plate (501) being fixedly connected with the outer wall (1) of the fractionating tower, the power supply (504) and the processing control unit (503) being installed on the bottom plate (501), the motor (507) being installed on the side wall (500), and the cover plate (502) being detachably installed on the side wall (500).

5. A fractionating column seal gas supply apparatus according to claim 3, wherein: The air inlet main pipeline (2) is further provided with an air inlet main valve (3).

6. A fractionating column seal gas supply apparatus according to claim 1, wherein: The outer wall (1) of the fractionating tower comprises an outer wall body (100) and a plurality of connecting pieces (101) which are uniformly arranged on the outer wall body (100) from bottom to top, the plurality of connecting pieces (101) communicating the outside and the inside of the outer wall body (100); the gas supply pipeline comprises an air outlet pipeline (7) and an air inlet sub-pipeline (6), the air inlet sub-pipeline (6) being installed on the side of the connecting piece (101) located outside the outer wall body (100), and the air outlet pipeline (7) being installed on the side of the connecting piece (101) located inside the outer wall body (100) and surrounding the outer wall body (100).

7. A fractionating column seal gas supply apparatus according to claim 6, wherein: The air outlet pipeline (7) is provided with a plurality of air outlet holes which are uniformly arranged on the air outlet pipeline (7).

8. A fractionating column seal gas supply apparatus according to claim 6, wherein: Further comprising a plurality of supporting pieces (8) which are arranged around the outer wall body (100) to support the air outlet pipeline (7).

9. A fractionating column seal gas supply apparatus according to claim 6, wherein: The exhaust pipes (7) in the plurality of gas supply units are uniformly arranged along the outer wall (1) of the fractionating tower from bottom to top, and the distance between two closest exhaust pipes (7) is five meters.

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