Gas inlet device for nitric acid absorption tower

Abstract

The utility model relates to the technical field of pipeline accessories, concretely to a gas inlet device of nitric acid absorption tower, including parallelly arranged gas inlet seat and gas conveying seat, and the middle part between gas inlet seat and gas conveying seat is fixed through the connecting seat, and the both ends between gas inlet seat and gas conveying seat are respectively installed with the main filter pipeline and the standby filter pipeline that can be dismantled and are connected, the utility model discloses the parallel arrangement of the gas inlet seat and the gas conveying seat that are set up and the middle part are fixed by the connecting seat, and the both ends are installed with the main filter pipeline and the standby filter pipeline that can be dismantled and are connected, make the device possess double -channel filtering capacity, when the main filter pipeline needs maintenance or appears the fault, can switch to the standby filter pipeline, guarantee the continuous gas inlet of absorption tower, the control gate valve can respectively carry out the independent control to the gas inlet of main, the standby filter pipeline, and the switching and the adjustment are convenient, the filter screen cylinder is convenient to install and dismantle replacement, can effectively filter the impurity in the gas inlet, guarantee the stable operation of absorption tower.

Description

Technical Field

[0001] This utility model relates to the field of pipeline fittings technology, specifically to an air inlet device for a nitric acid absorption tower. Background Technology

[0002] In the nitric acid production process, the quality and stability of the inlet gas of the absorption tower play a crucial role in the yield and quality of nitric acid. While existing nitric acid absorption tower inlet technologies have met basic production needs to a certain extent after years of development, their problems are becoming increasingly prominent as the industry's requirements for production efficiency, product quality, and environmental protection continue to rise. For example, CN220834859U discloses an inlet device for a nitric acid absorption tower that only has a single inlet channel. If this channel malfunctions or requires maintenance, the absorption tower must be shut down, leading to production interruptions and impacting the company's production plans and economic benefits. Furthermore, frequent shutdowns and restarts increase equipment energy consumption and wear. Utility Model Content

[0003] The purpose of this invention is to provide an air inlet device for a nitric acid absorption tower to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] An air intake device for a nitric acid absorption tower includes an air intake seat and an air delivery seat arranged in parallel. The air intake seat and the air delivery seat are fixed in the middle by a connecting seat. A detachable and connected main filter pipe and a spare filter pipe are respectively installed at both ends of the air intake seat and the air delivery seat. Two sets of control gate valves are installed on the top surface of the air intake seat and the air delivery seat.

[0006] Both the main filter pipe and the backup filter pipe include a pipe body and a detachable filter screen cylinder installed inside. A ring-shaped limiting ring seat is installed on the inner wall of one end of the pipe body, and a fixing ring seat is installed at one end of the detachable filter screen cylinder.

[0007] Preferably, an air intake pipe connected to an external air supply pipe is installed in the middle of the side of the air intake seat away from the connecting seat.

[0008] Preferably, a gas supply pipe connected to the gas inlet of the nitric acid absorption tower is installed in the middle of the side of the gas supply seat away from the connecting seat.

[0009] Preferably, a connecting flange is installed at one end of both the air inlet pipe and the air delivery pipe.

[0010] Preferably, the air inlet seat, air outlet seat, and connecting seat are integrally formed and connected in an I-shape.

[0011] Preferably, both ends of the main filter pipe and the backup filter pipe are provided with mounting flanges.

[0012] Preferably, a sealing gasket with a thickness of 1-3mm is provided between the connection between the mounting flange and the air inlet seat and the air outlet seat.

[0013] Preferably, the distance between the limiting ring seat and the pipe opening is the same as the thickness of the fixing ring seat, and both are 5-20mm.

[0014] Compared with existing technologies, the beneficial effects of this utility model are:

[0015] 1. In the air intake device of this nitric acid absorption tower, the air intake seat and the air delivery seat are arranged in parallel and fixed in the middle by a connecting seat. The two ends are equipped with detachable and connected main filter pipes and backup filter pipes, which enable the device to have dual-channel filtration capability. When the main filter pipe needs maintenance or fails, it can be switched to the backup filter pipe to ensure continuous air intake to the absorption tower. Two sets of control gate valves installed on the top surface of the air intake seat and the air delivery seat can independently control the air intake of the main and backup filter pipes, which is convenient for switching and adjustment. The design of detachable filter screens, limit rings and fixing rings inside the main filter pipes and backup filter pipes makes it easy to install, remove and replace the filter screens, effectively filtering impurities in the air intake and ensuring the stable operation of the absorption tower. The overall structure improves the reliability and maintenance convenience of the air intake device.

[0016] 2. In the gas inlet device of this nitric acid absorption tower, a gas inlet pipe connected to an external gas supply pipe is installed in the middle of the side of the gas inlet seat away from the connecting seat, and a gas supply pipe connected to the gas inlet of the nitric acid absorption tower is installed in the middle of the side of the gas supply seat away from the connecting seat. A connecting flange is installed at one end of both the gas inlet pipe and the gas supply pipe, so that the gas inlet device can be easily connected to the external gas supply pipe and the nitric acid absorption tower. The connection method is standardized and easy to install, disassemble and maintain.

[0017] 3. In the gas inlet device of this nitric acid absorption tower, both ends of the main filter pipe and the backup filter pipe are equipped with mounting flanges. Sealing gaskets are installed between the mounting flanges and the gas inlet seat and the gas delivery seat, which can effectively improve the sealing between the main filter pipe, the backup filter pipe and the gas inlet seat and the gas delivery seat, prevent gas leakage, and ensure the normal operation of the gas inlet device. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are explained in detail together with the embodiments of the present invention, but do not constitute a limitation thereof.

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the cross-sectional structure of the spare filter pipe of this utility model;

[0022] The meaning of each label in the diagram:

[0023] 10. Air intake seat; 11. Air intake pipe; 12. Connecting flange;

[0024] 20. Gas supply seat; 21. Gas supply pipe;

[0025] 30. Connecting seat;

[0026] 40. Control gate valve;

[0027] 50. Main filter pipe; 51. Mounting flange;

[0028] 60. Spare filter pipe; 61. Pipe body; 62. Limiting ring seat; 63. Removable filter screen cylinder; 64. Fixing ring seat. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] In the description of this utility model, it should be understood that the terms "center", "vertical", "horizontal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0031] An inlet device for a nitric acid absorption tower, such as Figures 1-3As shown, the system includes an air inlet seat 10 and an air outlet seat 20 arranged in parallel. The air inlet seat 10 and the air outlet seat 20 are fixed at the middle by a connecting seat 30. A detachable and interconnected main filter pipe 50 and a backup filter pipe 60 are respectively installed at both ends of the air inlet seat 10 and the air outlet seat 20. Two sets of control gate valves 40 are installed on the top surface of both the air inlet seat 10 and the air outlet seat 20. Both the main filter pipe 50 and the backup filter pipe 60 include a pipe body 61 and a detachable filter screen 63 installed inside. A ring-shaped limiting ring seat 62 is installed on the inner wall of one end of the pipe body 61, and a fixing ring seat 64 is installed at one end of the detachable filter screen 63. The air inlet seat 10 and the air outlet seat 20 are arranged in parallel and fixed at the middle by the connecting seat 30, with detachable and interconnected main filter pipes 50 and backup filter pipes 60 installed at both ends. The interconnected main filter pipe 50 and backup filter pipe 60 enable the device to have dual-channel filtration capabilities. When the main filter pipe 50 requires maintenance or malfunctions, it can be switched to the backup filter pipe 60 to ensure continuous air intake to the absorption tower. The two sets of control gate valves 40 installed on the top surfaces of the air inlet seat 10 and the air delivery seat 20 can independently control the air intake of the main and backup filter pipes, facilitating switching and adjustment. The design of the detachable filter screen 63 inside the main filter pipe 50 and the backup filter pipe 60, as well as the limiting ring seat 62 and the fixing ring seat 64 inside the pipe body 61, makes the filter screen 63 easy to install, remove and replace, effectively filtering impurities in the air intake and ensuring the stable operation of the absorption tower. The overall structure improves the reliability and maintenance convenience of the air intake device.

[0032] Furthermore, an air inlet pipe 11 connected to an external air supply pipe is installed in the middle of the side of the air inlet seat 10 away from the connecting seat 30, and an air supply pipe 21 connected to the air inlet of the nitric acid absorption tower is installed in the middle of the side of the air supply seat 20 away from the connecting seat 30. A connecting flange 12 is installed at one end of both the air inlet pipe 11 and the air supply pipe 21, so that the air inlet device can be easily connected to the external air supply pipe and the nitric acid absorption tower. The connection method is standardized and easy to install, disassemble and maintain.

[0033] It is worth noting that the air intake seat 10, the air delivery seat 20 and the connecting seat 30 are integrally formed and connected in an I-shape, which makes the structure of the entire air intake device more stable, enhances the overall strength and stability of the device, and reduces the risk of air leakage caused by structural loosening.

[0034] Specifically, both ends of the main filter pipe 50 and the backup filter pipe 60 are equipped with mounting flanges 51. A sealing gasket with a thickness of 1-3mm is installed between the mounting flanges 51 and the air inlet seat 10 and the air delivery seat 20. This can effectively improve the sealing between the main filter pipe 50, the backup filter pipe 60 and the air inlet seat 10 and the air delivery seat 20, prevent gas leakage, and ensure the normal operation of the air intake device.

[0035] In addition, the spacing between the limiting ring seat 62 and the pipe opening is the same as the thickness of the fixed ring seat 64, and both are 5-20mm. This makes the installation of the detachable filter screen 63 in the pipe body 61 more precise and stable, ensuring the sealing and connection reliability between the filter screen 63 and the pipe body 61, which is conducive to the normal operation of filtration.

[0036] The working principle of the air inlet device of the nitric acid absorption tower of this utility model:

[0037] First, the air inlet device is connected to the external gas supply pipe through the connecting flange 12 of the air inlet pipe 11, and then the connecting flange 12 of the gas supply pipe 21 is used to connect it to the air inlet of the nitric acid absorption tower to ensure a tight connection. At this time, the stable structure formed by the air inlet seat 10, the gas supply seat 20 and the connecting seat 30 provides a channel for gas transportation.

[0038] Next, according to actual needs, the main filter pipe 50 or the backup filter pipe 60 can be opened by using the control gate valve 40 on the top surface of the inlet seat 10 and the outlet seat 20. If the main filter pipe 50 is opened, the gas enters the inlet seat 10 from the inlet pipe 11, and then passes through the pipe body 61 of the main filter pipe 50. The removable filter screen 63 inside the pipe filters the gas and removes impurities. The filtered gas passes through the outlet seat 20 and enters the nitric acid absorption tower from the outlet pipe 21.

[0039] When the main filter pipe 50 needs maintenance or malfunctions, the corresponding control gate valve 40 is closed and the control gate valve 40 of the backup filter pipe 60 is opened, switching to the backup filter pipe 60 to continue working. When replacing the filter cylinder 63, since the main and backup filter pipes have mounting flanges 51 at both ends and the limit ring seat 62 inside the pipe cooperates with the fixing ring seat 64 of the filter cylinder 63, the filter cylinder 63 can be easily disassembled and installed.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An air inlet device for a nitric acid absorption tower, characterized in that: It includes an air inlet seat (10) and an air delivery seat (20) arranged in parallel. The middle part of the air inlet seat (10) and the air delivery seat (20) is fixed by a connecting seat (30). A detachable and connected main filter pipe (50) and a spare filter pipe (60) are respectively installed at both ends of the air inlet seat (10) and the air delivery seat (20). Two sets of control gate valves (40) are installed on the top surface of the air inlet seat (10) and the air delivery seat (20). Both the main filter pipe (50) and the backup filter pipe (60) include a pipe body (61) and a detachable filter screen cylinder (63) disposed inside. A ring-shaped limiting ring seat (62) is installed on the inner wall of one end of the pipe body (61), and a fixing ring seat (64) is installed at one end of the detachable filter screen cylinder (63).

2. The air inlet device of the nitric acid absorption tower according to claim 1, characterized in that: An air inlet pipe (11) connected to an external air supply pipe is installed in the middle of the side of the air inlet seat (10) away from the connecting seat (30).

3. The air inlet device of the nitric acid absorption tower according to claim 2, characterized in that: The gas supply seat (20) is equipped with a gas supply pipe (21) connected to the gas inlet of the nitric acid absorption tower at the middle of the side away from the connecting seat (30).

4. The air inlet device of the nitric acid absorption tower according to claim 3, characterized in that: A connecting flange (12) is installed at one end of both the air inlet pipe (11) and the air delivery pipe (21).

5. The air inlet device for the nitric acid absorption tower according to claim 1, characterized in that: The air inlet seat (10), air outlet seat (20) and connecting seat (30) are integrally formed structures and are connected in an I-shape.

6. The air inlet device for the nitric acid absorption tower according to claim 1, characterized in that: Both ends of the main filter pipe (50) and the backup filter pipe (60) are equipped with mounting flanges (51).

7. The air inlet device for the nitric acid absorption tower according to claim 6, characterized in that: A sealing gasket with a thickness of 1-3mm is provided between the connection between the mounting flange (51) and the air inlet seat (10) and the air outlet seat (20).

8. The air inlet device for the nitric acid absorption tower according to claim 1, characterized in that: The distance between the limiting ring seat (62) and the pipe opening is the same as the thickness of the fixing ring seat (64), and both are 5-20mm.

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