Ammonia-containing tail gas absorption tower with double structures of inner ring and outer ring

Abstract

The ammonia-containing tail gas absorption tower comprises a shell, the top end of the shell is of an open structure, a mounting hole is formed in the middle of the lower surface of the shell, a gas inlet pipe is fixedly connected to the interior of the mounting hole, a flow guide cover is fixedly connected to the top end of the gas inlet pipe through a connecting rod, and an upper sealing plate is clamped to the upper end of the shell; an inner cylinder is fixedly connected to the lower surface of the upper sealing plate, an inner ring and an outer ring are designed, the inner ring and the outer ring are provided with an independent spraying system and an independent packing layer respectively, the inner ring is mainly used for preliminarily absorbing high-concentration ammonia gas in ammonia-containing tail gas, and the outer ring is used for further deeply purifying the tail gas. According to the double-structure design, the gas-liquid contact area is increased, the gas-liquid contact time is prolonged, the absorption efficiency is improved, meanwhile, reasonable flowing and distribution of absorption liquid are achieved between the inner ring and the outer ring through a special communication structure, the absorption process is optimized, and the absorption tower is novel in structure, remarkable in purification effect and capable of effectively treating ammonia-containing tail gas.

Description

Technical Field

[0001] This utility model relates to the field of tail gas absorption tower technology, specifically to an ammonia-containing tail gas absorption tower with an inner and outer ring dual structure. Background Technology

[0002] Chemical reactions produce various wastes; solid, liquid, and gaseous wastes can all be generated. Among the gaseous wastes, common ones are toxic and harmful gases such as ammonia and hydrogen sulfide, which seriously pollute the environment.

[0003] Ammonia can also be used as an important chemical raw material. If it is recovered, it can save resources. Therefore, special equipment is needed to treat ammonia generated in industrial production or laboratory chemical research. Such equipment is called ammonia tail gas treatment equipment.

[0004] However, existing ammonia-containing tail gas absorption towers have a small gas-liquid contact area and short contact time during use, resulting in low absorption efficiency and poor absorbent fluidity. Consequently, the equipment has low treatment efficiency and poor treatment quality for ammonia-containing tail gas. Therefore, we propose an ammonia-containing tail gas absorption tower with a dual inner and outer ring structure. Utility Model Content

[0005] The technical problem this invention aims to solve is to overcome the shortcomings of existing technologies and provide a dual-structure ammonia-containing tail gas absorption tower with inner and outer rings. The tower employs an inner and outer ring design, with each ring having its own independent spray system and packing layer. The inner ring primarily absorbs high-concentration ammonia from the tail gas, while the outer ring further purifies the gas. This dual-structure design increases the gas-liquid contact area and contact time, improving absorption efficiency. Simultaneously, a special interconnecting structure between the inner and outer rings enables the rational flow and distribution of the absorbent liquid, optimizing the absorption process. This novel absorption tower exhibits significant purification effects and can effectively treat ammonia-containing tail gas, thus effectively solving the problems in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an ammonia-containing tail gas absorption tower with an inner and outer ring dual structure, comprising an outer shell, the top of which is an open structure, and an installation hole is provided in the middle of the lower surface of the outer shell. An air inlet pipe is fixedly connected inside the installation hole, and a flow guide is fixedly connected to the top of the air inlet pipe via a connecting rod. An upper sealing plate is snapped onto the upper end of the outer shell, and an inner cylinder is fixedly connected to the lower surface of the upper sealing plate. A vent hole is provided at the upper end of the inner cylinder, and the lower outer ring of the outer shell is arranged in a circular array. It has an exhaust port. A booster pump is fixedly connected to the left side of the lower surface of the outer shell. A diverter valve is fixedly connected to the middle of the upper surface of the upper sealing plate. The inlet end of the booster pump is connected to the inside of the outer shell. The outlet end of the booster pump is connected to the inlet end of the diverter valve through a return pipe. The outlet end of the diverter valve is connected to a spray pipe. The outlet end of the spray pipe is connected to the inside of the outer shell. Support legs are fixedly connected in a circular array on the lower surface of the outer shell. Hangers are fixedly connected in a circular array on the inner surface of the outer shell and the inner surface of the inner cylinder, respectively.

[0007] Wherein: the input end of the booster pump is connected to the output end of an external power supply via a switch.

[0008] Furthermore, it also includes a reflux hood, which is an inclined structure. The reflux hood is fixedly connected to the lower end of the exhaust hole opened on the outer ring side of the shell, and baffles are provided on both sides of the reflux hood. The reflux hood can effectively prevent the absorbent liquid from flowing out of the equipment when spraying, thereby preventing the absorbent liquid from polluting the surrounding environment and making the use of the absorption tower safer.

[0009] Furthermore, it also includes a rain cover, which is fixedly connected to the lower end of the outer ring surface of the outer shell in a circumferential array, and the rain cover covers the upper opening of the reflux shroud; the rain cover can effectively prevent rainwater from entering the interior of the absorption tower, prevent the absorbent liquid from being contaminated by rainwater and affecting the concentration of the absorbent liquid, and prevent affecting the normal use of the absorption tower, thereby making the use of the absorption tower more stable.

[0010] Furthermore, the lower end of the inner cylinder is designed to be non-contact with the inner bottom surface of the outer shell, and the inner ring surface of the lower end of the inner cylinder is provided with a cross brace that is fixedly connected to the outer surface of the air inlet pipe; the non-contact inner cylinder and outer shell facilitate the flow of the absorbent liquid, and the connection between the inner cylinder and the air inlet pipe can strengthen the structural strength of the inner cylinder and prevent the inner cylinder from shifting and affecting the normal use of the absorption tower.

[0011] Furthermore, the hangers are arranged in pairs, with an L-shaped structure. The two hangers hold the corresponding filler material in the middle, and a support plate is fixedly connected to the lower end of the hanger. The upper surface of the support plate is in contact with the filler material. The two hangers arranged in pairs can more stably hold the filler material, and the support plate can prevent the filler material from falling and affecting the absorption effect, thereby making the absorption tower more stable in use.

[0012] Furthermore, the reflux pipe is a flexible pipe, and both the outer shell and the inner cylinder are electroplated with a nickel-based alloy corrosion-resistant layer; the flexible structure of the reflux pipe allows workers to easily install and remove the top sealing plate, and the plating on the outer shell and the inner cylinder can extend the service life of the absorption tower.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This ammonia-containing tail gas absorption tower with a dual inner and outer ring structure has the following advantages:

[0014] 1. The tower adopts an inner and outer ring design, with independent spray systems and packing layers in the inner and outer rings respectively. The inner ring is mainly used for the initial absorption of high-concentration ammonia in ammonia-containing tail gas, while the outer ring further purifies the tail gas. This dual-structure design increases the gas-liquid contact area and contact time, improving absorption efficiency. At the same time, the inner and outer rings are connected by a special structure to achieve reasonable flow and distribution of the absorbent liquid, optimizing the absorption process. This absorption tower has a novel structure, significant purification effect, and can effectively treat ammonia-containing tail gas.

[0015] 2. The reflux hood effectively prevents the absorbent liquid from flowing out of the equipment during spraying, thereby preventing the absorbent liquid from polluting the surrounding environment and making the use of the absorption tower safer.

[0016] 3. The rainproof cover effectively prevents rainwater from entering the absorption tower, avoiding contamination of the absorbent liquid and affecting its concentration, thus ensuring the normal operation of the absorption tower and making its use more stable. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the front cross-sectional structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the upper cross-sectional structure of this utility model.

[0020] In the diagram: 1. Outer shell, 2. Upper sealing plate, 3. Inner cylinder, 4. Air inlet pipe, 5. Flow guide, 6. Return flow cover, 7. Rain cover, 8. Booster pump, 9. Return flow pipe, 10. Diverter valve, 11. Spray pipe, 12. Support leg, 13. Hanger. Detailed Implementation

[0021] 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.

[0022] Please see Figure 1-3 This embodiment provides a technical solution: an ammonia-containing tail gas absorption tower with an inner and outer ring dual structure, including an outer shell 1. The top of the outer shell 1 is an open structure, and an installation hole is provided in the middle of the lower surface of the outer shell 1. An air inlet pipe 4 is fixedly connected inside the installation hole. A flow guide shroud 5 is fixedly connected to the top of the air inlet pipe 4 through a connecting rod. An upper sealing plate 2 is snapped onto the upper end of the outer shell 1, and an inner cylinder 3 is fixedly connected to the lower surface of the upper sealing plate 2. A vent hole is provided at the upper end of the inner cylinder 3. Exhaust holes are arranged in a circular array on the outer ring side of the lower end of the outer shell 1. A booster pump 8 is fixedly connected to the left side of the lower surface of the upper cover plate 2. A diversion valve 10 is fixedly connected to the middle of the upper surface of the upper cover plate 2. The inlet end of the booster pump 8 is connected to the inside of the outer shell 1. The outlet end of the booster pump 8 is connected to the inlet end of the diversion valve 10 through the return pipe 9. The outlet end of the diversion valve 10 is connected to the spray pipe 11. The outlet end of the spray pipe 11 is connected to the inside of the outer shell 1. Support legs 12 are fixedly connected in a circular array on the lower surface of the outer shell 1. Hangers 13 are fixedly connected in a circular array on the inner surfaces of the outer shell 1 and the inner surfaces of the inner cylinder 3, respectively.

[0023] Among them, the input end of the booster pump 8 is connected to the output end of the external power supply through a switch.

[0024] In this embodiment, a reflux hood 6 is also included. The reflux hood 6 has an inclined structure and is fixedly connected to the lower end of the exhaust hole opened on the outer ring side of the outer shell 1. Baffles are provided on both sides of the reflux hood 6. The reflux hood 6 can effectively prevent the absorbent liquid from flowing out of the equipment when it is sprayed, thereby preventing the absorbent liquid from polluting the surrounding environment and making the use of the absorption tower safer.

[0025] In this embodiment, a rain cover 7 is also included. The rain cover 7 is fixedly connected to the lower end of the outer ring surface of the outer shell 1 in a circumferential array, and the rain cover 7 covers the upper opening of the reflux hood 6. The rain cover 7 can effectively prevent rainwater from entering the absorption tower, prevent the absorbent liquid from being contaminated by rainwater and affecting the concentration of the absorbent liquid, and prevent the normal use of the absorption tower from being affected, thereby making the use of the absorption tower more stable.

[0026] In this embodiment, the lower end of the inner cylinder 3 is designed to be non-contact with the inner bottom surface of the outer shell 1, and the inner ring surface of the lower end of the inner cylinder 3 is provided with a cross brace that is fixedly connected to the outer surface of the air inlet pipe 4; the non-contact inner cylinder 3 and outer shell 1 can facilitate the flow of the absorbent liquid, and the connection between the inner cylinder 3 and the air inlet pipe 4 can strengthen the structural strength of the inner cylinder 3 and prevent the inner cylinder 3 from shifting and affecting the normal use of the absorption tower.

[0027] In this embodiment, the hangers 13 are arranged in pairs. The hangers 13 have an L-shaped structure. The two hangers 13 hold the corresponding filler in the middle, and the lower end of the hanger 13 is fixedly connected to a support plate. The upper surface of the support plate is in contact with the filler. The two hangers 13 can hold the filler more stably, and the support plate can prevent the filler from falling and affecting the absorption effect, thus making the use of the absorption tower more stable.

[0028] In this embodiment, the reflux pipe 9 is a flexible pipe, and the surfaces of the outer shell 1 and the inner cylinder 3 are electroplated with a nickel-based alloy corrosion-resistant layer; the flexible structure of the reflux pipe 9 makes it easy for staff to install and remove the top sealing plate 2, and the coating on the surfaces of the outer shell 1 and the inner cylinder 3 can extend the service life of the absorption tower.

[0029] The working principle of the ammonia-containing tail gas absorption tower with inner and outer ring double structure provided by this utility model is as follows: The ammonia-containing tail gas to be treated enters the absorption tower through the inlet pipe 4. As the amount of ammonia-containing tail gas entering increases, the gas pressure inside the absorption tower increases, causing the ammonia-containing gas to flow upward and be discharged through the upper vent hole from the inner cylinder 3 to the space between the inner cylinder 3 and the outer shell 1. Then, the ammonia-containing tail gas moves downward and is discharged through the exhaust hole on the side surface of the outer shell 1. When the ammonia-containing tail gas moves, the filling material hanging between the brackets 13 absorbs the ammonia element. At the same time, the absorbent liquid is sprayed into the absorption tower through the diversion valve 10 and the spray pipe 11. The guide hood 5 and the return hood 6 can prevent the absorbent liquid from dripping outside the absorption tower and affecting the surrounding environment. After the absorbent liquid is sprayed, it falls to the bottom of the outer shell 1. The booster pump 8 delivers it back to the diversion valve 10 for spraying again, thereby achieving the purpose of recycling the absorbent liquid.

[0030] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A dual-structure ammonia-containing tail gas absorption tower with inner and outer rings, characterized in that: Includes an outer shell (1), the top of the outer shell (1) is an open structure, and an installation hole is provided in the middle of the lower surface of the outer shell (1). An air inlet pipe (4) is fixedly connected inside the installation hole. A guide shroud (5) is fixedly connected to the top of the air inlet pipe (4) through a connecting rod. An upper sealing plate (2) is snapped onto the upper end of the outer shell (1), and an inner cylinder (3) is fixedly connected to the lower surface of the upper sealing plate (2). A vent is provided at the upper end of the inner cylinder (3). An exhaust hole is provided in a circular array on the outer ring side of the lower end of the outer shell (1). A booster pump (8) is fixedly connected to the left side of the lower surface of the outer shell (1). A diversion valve (10) is fixedly connected to the middle of the upper surface of the plate (2), and the inlet end of the booster pump (8) is connected to the inside of the outer shell (1). The outlet end of the booster pump (8) is connected to the inlet end of the diversion valve (10) through the return pipe (9). The outlet end of the diversion valve (10) is connected to the spray pipe (11), and the outlet end of the spray pipe (11) is connected to the inside of the outer shell (1). The lower surface of the outer shell (1) is fixedly connected to the support legs (12) in a circular array, and the inner surfaces of the outer shell (1) and the inner cylinder (3) are respectively fixedly connected to the hangers (13) in a circular array. Wherein: the input end of the booster pump (8) is connected to the output end of an external power supply via a switch.

2. The ammonia-containing tail gas absorption tower with an inner and outer ring dual structure according to claim 1, characterized in that: It also includes a return shroud (6), which is an inclined structure. The return shroud (6) is fixedly connected to the lower end of the exhaust hole opened on the outer ring side of the outer shell (1), and baffles are provided on both sides of the return shroud (6).

3. The ammonia-containing tail gas absorption tower with an inner and outer ring dual structure according to claim 2, characterized in that: It also includes a rain cover (7), which is fixedly connected to the lower end of the outer ring surface of the outer shell (1) in a circumferential array, and the rain cover (7) covers the upper opening of the return shroud (6).

4. The ammonia-containing tail gas absorption tower with an inner and outer ring dual structure according to claim 1, characterized in that: The lower end of the inner cylinder (3) is designed to be non-contact with the inner bottom surface of the outer shell (1), and the inner ring surface of the lower end of the inner cylinder (3) is provided with a cross brace that is fixedly connected to the outer surface of the air inlet pipe (4).

5. The ammonia-containing tail gas absorption tower with an inner and outer ring dual structure according to claim 1, characterized in that: The two hangers (13) are in a group. The hangers (13) are L-shaped structures. The two hangers (13) hold the corresponding fillers in the middle. The lower end of the hanger (13) is fixedly connected to a tray, and the upper surface of the tray is in contact with the filler.

6. The ammonia-containing tail gas absorption tower with an inner and outer ring dual structure according to claim 1, characterized in that: The return pipe (9) is a flexible pipe, and the surfaces of the outer shell (1) and the inner cylinder (3) are electroplated with a nickel-based alloy corrosion-resistant layer.

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