A gas-liquid separation nitric acid absorption tower

Abstract

This utility model relates to the field of absorption tower technology, specifically to a gas-liquid separation nitric acid absorption tower, comprising an absorption tower body, a discharge pipe fixedly installed at the bottom end of the absorption tower body, a gas outlet hood fixedly installed at the top of the absorption tower body, a raw liquid pipe fixedly installed at the bottom of the absorption tower body, and multiple inclined pipes provided at the liquid outlet end of the raw liquid pipe, with adjacent inclined pipes connected by a connecting pipe. One end of one inclined pipe is fixedly installed on the raw liquid pipe, and multiple vertical holes are provided on the inclined pipe, arranged vertically, with the top and bottom of the vertical holes connected to the outside, and the bottom opening of the vertical holes located on the bottom surface of the inclined pipe. The absorption tower body also includes two symmetrically arranged spraying components for spraying the chemical solution for reaction processing. This utility model facilitates gas-liquid separation operations and reduces liquid residue.

Description

Technical Field

[0001] This utility model relates to the field of absorption tower technology, and more specifically, to a gas-liquid separation nitric acid absorption tower. Background Technology

[0002] In the nitric acid production process, the nitric acid absorption tower is one of the key pieces of equipment. Its function is to absorb nitrogen oxide-containing gases by contacting them with the absorption liquid, thereby converting the nitrogen oxides into nitric acid. However, existing nitric acid absorption towers have many problems in terms of gas-liquid separation. For example, the gas-liquid separation effect is not good, resulting in the exhaust gas still containing a lot of mist droplets. This not only wastes nitric acid, but also causes corrosion and blockage to subsequent gas treatment equipment.

[0003] Utility model patent CN221580177U discloses a nitric acid absorption tower for improving gas-liquid separation. The tower includes a tower body with a tail gas outlet at the top, a liquid outlet at the bottom, and an air inlet at the lower part. It includes a baffle plate demister and a swirl plate. Multiple baffle plate demisters are fixed sequentially from top to bottom inside the tower body. A swirl plate is fixed inside the tower body below the baffle plate demisters. A first atomizing disc is fixed inside the tower body below the swirl plate. At least one second atomizing disc is fixed inside the tower body between the swirl plate and its adjacent baffle plate demister. At least one third atomizing disc is fixed inside the tower body between two adjacent baffle plate demisters.

[0004] While this technical solution has its advantages, most current nitric acid absorption towers have horizontally positioned feed inlets with upward-facing openings. This configuration results in some raw liquid remaining in the pipeline, preventing complete discharge. Furthermore, this design causes spray liquid generated during subsequent spraying processes to enter and remain in the pipeline, affecting liquid drainage and causing inconvenience to users. Therefore, we propose a gas-liquid separation nitric acid absorption tower. Utility Model Content

[0005] The purpose of this invention is to provide a gas-liquid separation nitric acid absorption tower to solve the defects mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A gas-liquid separation nitric acid absorption tower includes an absorption tower body, a discharge pipe fixedly installed at the bottom end of the absorption tower body, a gas outlet hood fixedly installed at the top of the absorption tower body, a raw liquid pipe fixedly installed at the bottom of the absorption tower body and inclined downwards, and multiple inclined tubes provided at the liquid outlet end of the raw liquid pipe, with adjacent inclined tubes connected by a connecting pipe, one end of one inclined tube fixedly installed on the raw liquid pipe, and multiple vertical holes arranged linearly and equally spaced along the length of the inclined tube, the vertical holes being arranged vertically, with the top and bottom of the vertical holes connected to the outside, and the bottom opening of the vertical holes located on the bottom surface of the inclined tube; the absorption tower body also includes two symmetrically arranged uniformly distributed spraying components for spraying the chemical solution for reaction processing.

[0008] Preferably, the bottom of the absorption tower is funnel-shaped, and a valve is fixedly installed on the discharge pipe.

[0009] Preferably, an air outlet pipe is fixedly installed at the top of the air outlet hood, and a fan is fixedly installed on the air outlet pipe;

[0010] This feature facilitates the smooth discharge of gas.

[0011] Preferably, the original liquid tube is inclined downward at 30 to 45 degrees, and the inclined tube is inclined downward at 15 to 30 degrees.

[0012] This feature facilitates the emptying of the original liquid tube and the inclined tube, preventing liquid residue.

[0013] Preferably, the outlet end of the inclined pipe is connected to the outside, and the uniform spraying assembly delivers the medicine through the medicine delivery pipe and the outlet pipe.

[0014] Preferably, the uniformly distributed spraying assembly includes a central liquid storage tray disposed within the absorption tower body, one end of the liquid outlet pipe is connected to the liquid delivery pipe, the other end of the liquid outlet pipe is connected to the central liquid storage tray, multiple ring pipes are disposed outside the central liquid storage tray, and multiple connecting pipes are connected between the ring pipes and between the ring pipes and the central liquid storage tray, and multiple spray nozzles are fixedly installed at the bottom of the central liquid storage tray and the ring pipes;

[0015] This setting allows the spraying process to proceed normally.

[0016] Preferably, ventilation gaps are provided between the ring pipes and between the ring pipes and the central liquid storage pan, and the ventilation gaps are used for gas escape.

[0017] Preferably, two symmetrically arranged breathable liners are fixedly installed on the inner wall of the absorption tower, and the breathable liners are located below the corresponding nozzles.

[0018] The breathable liner in this design, once wetted, increases the contact area and reaction time with the gas, thereby improving the gas-liquid separation effect.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1. This utility model, by setting a downward-sloping raw liquid pipe and an inclined pipe, and setting a vertical hole on the inclined pipe, allows gas and liquid to be discharged, while connecting the liquid outlet of the inclined pipe to the outside, so that the raw liquid and spray liquid can be discharged smoothly, avoiding liquid residue in the pipe, achieving a good liquid drainage effect, and bringing convenience to the user.

[0021] 2. This utility model designs a symmetrical, evenly distributed spray assembly, consisting of a central liquid storage pan, a ring pipe, a connecting pipe, and spray nozzles. An air gap is provided between the ring pipe and the central liquid storage pan, allowing the absorption tower to perform uniform and sufficient spraying treatment, ensuring full contact between the gas and the liquid, improving reaction efficiency, and ensuring effective gas-liquid separation.

[0022] 3. By setting a breathable liner on the inner wall of the absorption tower, the gas-liquid separation effect is further optimized after the liner is wetted, which increases the contact area and reaction time with the gas. This makes the nitric acid absorption tower perform better in gas-liquid separation and improves the overall working quality and efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a partial structural schematic diagram of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of the uniformly distributed spray assembly of this utility model;

[0026] The meanings of the labels in the diagram are as follows:

[0027] 1. Absorption tower body; 10. Breathable liner; 11. Discharge pipe; 12. Valve; 13. Exhaust hood; 14. Exhaust pipe; 141. Fan;

[0028] 2. Raw material tube; 20. Inclined tube; 21. Conducting tube; 22. Vertical hole;

[0029] 3. Medicine delivery pipe; 30. Discharge pipe;

[0030] 4. Uniformly distributed spray assembly; 40. Central liquid storage tray; 41. Ring pipe; 42. Connecting pipe; 43. Air passage gap; 44. Sprayer head. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0032] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "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.

[0033] Please see Figures 1-3 This utility model provides a technical solution: a gas-liquid separation nitric acid absorption tower, including an absorption tower body 1, a discharge pipe 11 fixedly installed at the bottom end of the absorption tower body 1, a gas outlet hood 13 fixedly installed at the top of the absorption tower body 1, a raw liquid pipe 2 fixedly installed at the bottom of the absorption tower body 1 and inclined downwards, and a plurality of inclined pipes 20 provided at the liquid outlet end of the raw liquid pipe 2, with two adjacent inclined pipes 20 connected by a connecting pipe 21, one end of which is fixedly installed on the raw liquid pipe 2, the raw liquid pipe 2 being inclined downwards at 30 to 45 degrees, and the inclined pipes 20 being inclined downwards at 15 to 30 degrees, so that the raw liquid and spray liquid can be smoothly discharged under the action of gravity, avoiding liquid residue in the pipe, achieving a good liquid drainage effect, and reducing the inconvenience and potential problems caused by liquid residue.

[0034] like Figure 1 and Figure 2 As shown, the inclined pipe 20 is provided with a plurality of vertical holes 22 arranged linearly and at equal intervals along the length of the inclined pipe 20. The vertical holes 22 are arranged in the vertical direction, and the top and bottom of the vertical holes 22 are connected to the outside. The bottom opening of the vertical hole 22 is located on the bottom surface of the inclined pipe 20. The liquid outlet end of the inclined pipe 20 is connected to the outside, which facilitates the uniform discharge of gas and liquid along the end of the inclined pipe 20 and the upper and lower openings of the vertical holes 22, thereby improving the effect of subsequent spraying treatment.

[0035] like Figure 1 As shown, the bottom of the absorption tower 1 is funnel-shaped, and a valve 12 is fixedly installed on the discharge pipe 11. The funnel-shaped structure can guide the absorbed liquid to quickly converge to the discharge pipe 11. The valve 12 facilitates the control of liquid discharge, making the liquid discharge operation more convenient and controllable.

[0036] like Figure 1 As shown, an exhaust pipe 14 is fixedly installed at the top of the exhaust hood 13, and a fan 141 is fixedly installed on the exhaust pipe 14. The fan 141 provides suction power to accelerate the gas flow inside the tower, so that the gas after the reaction can be discharged smoothly and efficiently from the absorption tower 1, ensuring smooth airflow inside the absorption tower.

[0037] like Figure 1 and Figure 3 As shown, the absorption tower body 1 is also equipped with two symmetrical, uniformly distributed spraying components 4 for spraying the chemical solution for reaction processing. The uniformly distributed spraying components 4 transport the chemical solution through the chemical solution delivery pipe 3 and the outlet pipe 30. The uniformly distributed spraying components 4 include a central storage pan 40 installed inside the absorption tower body 1. One end of the outlet pipe 30 is connected to the chemical solution delivery pipe 3, and the other end of the outlet pipe 30 is connected to the central storage pan 40. Multiple ring pipes 4 are installed outside the central storage pan 40. 1. The loops 41 are connected to each other and to the central storage pan 40 by multiple connecting pipes 42. Multiple nozzles 44 are fixedly installed at the bottom of the central storage pan 40 and the loops 41. The liquid enters the central storage pan 40 through the liquid delivery pipe 3 and the outlet pipe 30, and is then evenly distributed to each loop 41 through the connecting pipes 42. Finally, it is evenly sprayed by the nozzles 44 at the bottom, which realizes the uniform and sufficient spraying of the gas in the tower, ensures that the gas and the liquid are in full contact, and improves the reaction effect.

[0038] like Figure 3 As shown, ventilation gaps 43 are provided between the ring pipes 41 and between the ring pipes 41 and the central liquid storage pan 40. The ventilation gaps 43 are used for the gas to escape, providing a channel for the gas to flow in the tower, so that the gas can pass smoothly through the spray area, avoiding the obstruction of gas flow by the spray components, and ensuring the smooth escape of gas during the gas-liquid reaction process.

[0039] like Figure 1 As shown, two symmetrically arranged permeable liners 10 are fixedly installed on the inner wall of the absorption tower body 1. The permeable liners 10 are located below the corresponding nozzles 44. When the permeable liners 10 are wetted by the sprayed liquid, a liquid film is formed on their surface, which increases the contact area with the gas and prolongs the reaction time between the gas and the liquid, thereby improving the gas-liquid separation treatment effect and optimizing the gas-liquid separation performance of the absorption tower.

[0040] It is worth noting that the original liquid pipe 2 is connected to the external gas-liquid delivery pipeline, the medicine delivery pipe 3 is connected to the external medicine delivery pump, and the medicine delivery pump is connected to the corresponding medicine storage tank.

[0041] When the gas-liquid separation nitric acid absorption tower of this utility model is in use, the external gas and liquid enter through the raw liquid pipe 2. Because it is inclined, and the inclined pipe 20 connected to the liquid outlet is also inclined downward, the gas and liquid can be evenly discharged through the vertical hole 22 and the end of the inclined pipe 20 under the action of gravity.

[0042] At the same time, the external liquid delivery pump delivers the liquid from the liquid storage tank through the liquid delivery pipe 3 and the outlet pipe 30 to the central liquid storage pan 40, then disperses it to the ring pipe 41 through the connecting pipe 42, and finally sprays it evenly by the nozzle 44 to fully react with the gas and liquid.

[0043] During the reaction, the gas rises in the absorption tower 1 and passes through the ventilation gap 43 between the ring pipe 41 and the central liquid storage plate 40. After the permeable liner 10 below the nozzle 44 is wetted by the liquid, the contact area with the gas increases, prolonging the reaction time and optimizing the gas-liquid separation effect.

[0044] The absorbed liquid, due to the funnel-shaped structure at the bottom of the absorption tower 1, converges to the discharge pipe 11 and is discharged through the valve 12; the reacted gas, under the action of the blower 141, is discharged outside the tower through the gas outlet hood 13 and the gas outlet pipe 14, thus completing the entire gas-liquid separation and absorption process.

[0045] 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. A gas-liquid separation nitric acid absorption tower, comprising an absorption tower body (1), characterized in that: A discharge pipe (11) is fixedly installed at the bottom of the absorption tower body (1), and an exhaust hood (13) is fixedly installed at the top of the absorption tower body (1). A raw liquid pipe (2) is fixedly installed at the bottom of the absorption tower body (1) and is inclined downwards. Multiple inclined pipes (20) are provided at the outlet end of the raw liquid pipe (2). Two adjacent inclined pipes (20) are connected by a connecting pipe (21). The end of one of the inclined pipes (20) is fixedly installed on the raw liquid pipe (2). On the inclined tube (20), a plurality of vertical holes (22) are arranged linearly and equally spaced along the length of the inclined tube (20). The vertical holes (22) are arranged in the vertical direction. The top and bottom of the vertical holes (22) are connected to the outside. The bottom opening of the vertical hole (22) is located on the bottom surface of the inclined tube (20). The absorption tower body (1) is also provided with two symmetrical spraying components (4) for spraying the liquid medicine for reaction treatment.

2. The gas-liquid separation nitric acid absorption tower according to claim 1, characterized in that: The bottom of the absorption tower body (1) is funnel-shaped, and a valve (12) is fixedly installed on the discharge pipe (11).

3. The gas-liquid separation nitric acid absorption tower according to claim 1, characterized in that: An air outlet pipe (14) is fixedly installed at the top of the air outlet hood (13), and a fan (141) is fixedly installed on the air outlet pipe (14).

4. The gas-liquid separation nitric acid absorption tower according to claim 1, characterized in that: The original liquid tube (2) is inclined downward at 30 to 45 degrees, and the inclined tube (20) is inclined downward at 15 to 30 degrees.

5. The gas-liquid separation nitric acid absorption tower according to claim 1, characterized in that: The outlet end of the inclined pipe (20) is connected to the outside, and the uniform spraying assembly (4) delivers the medicine through the medicine delivery pipe (3) and the outlet pipe (30).

6. The gas-liquid separation nitric acid absorption tower according to claim 5, characterized in that: The uniformly distributed spray assembly (4) includes a central liquid storage tray (40) disposed in the absorption tower body (1). One end of the liquid outlet pipe (30) is connected to the liquid delivery pipe (3), and the other end of the liquid outlet pipe (30) is connected to the central liquid storage tray (40). Multiple ring pipes (41) are disposed outside the central liquid storage tray (40). The ring pipes (41) are connected to each other and to the central liquid storage tray (40) through multiple connecting pipes (42). Multiple nozzles (44) are fixedly installed at the bottom of the central liquid storage tray (40) and the ring pipes (41).

7. The gas-liquid separation nitric acid absorption tower according to claim 6, characterized in that: Ventilation gaps (43) are provided between the ring pipes (41) and between the ring pipes (41) and the central liquid storage plate (40), and the ventilation gaps (43) are used for gas escape.

8. The gas-liquid separation nitric acid absorption tower according to claim 6, characterized in that: The inner wall of the absorption tower (1) is fixedly installed with two symmetrical breathable pads (10), which are located below the corresponding nozzles (44).

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