A spray type ammonia absorption tower

Abstract

The present invention relates to the technical field of ammonia recovery and treatment, and specifically to a spray-type ammonia water absorption tower. It includes an absorption tower and a spray assembly. The bottom end of the absorption tower is provided with a drain pipe, the top end of the absorption tower is provided with an exhaust port, the bottom fixed sleeve of the absorption tower is provided with an annular cover, a first mixing chamber is formed in the annular cover, a jet pump that passes into the first mixing chamber is fixedly provided on the annular cover, an annular baffle is provided in the first mixing chamber, an overflow channel is formed between the top of the annular baffle and the top wall of the annular cover, an annular baffle extending downward is provided at the bottom end of the absorption tower, the annular baffle is spaced inside the annular baffle, a conical cover is provided inside the bottom end of the annular cover, and a second mixing chamber is formed between the outer wall of the conical cover and the inner wall of the annular baffle. The jet pump of the present invention injects the mixture into the first mixing chamber, and gradually increases the absorption rate of ammonia through different mixing chambers, while preventing the bubbles generated by the jet pump from carrying ammonia to escape.

Description

Technical Field

[0001] The invention relates to the technical field of ammonia recovery and treatment, and in particular to a spray-type ammonia water absorption tower. Background Art

[0002] Ammonia is a toxic and flammable gas with a strong pungent odor. If ammonia-containing gas is discharged directly into the atmosphere without treatment, it will cause serious pollution to the environment, affect air quality, and may even form photochemical smog, aggravating environmental pollution. In addition, ammonia is an important chemical raw material. By recycling and treating ammonia in ammonia-containing gas, resources can be reused, production costs can be reduced, and economic benefits can be improved. The current spray-type ammonia absorption tower mainly relies on the contact absorption of liquid and ammonia, but during the absorption process, the droplets do not contact much with the gas, and the absorption efficiency is low. However, adding an absorption tower requires a lot of equipment and space.

[0003] In the prior art, the patent application document with application publication number CN110665337A discloses an ammonia tail gas recovery device, including a storage tank and an ejector, wherein the ejector is arranged on one side of the top of the storage tank, and a clean water storage chamber and a liquid ammonia storage chamber are arranged in the storage tank, wherein the clean water storage chamber is arranged at the bottom of the liquid ammonia storage chamber, and a falling film absorber is fixedly arranged on the top of the storage tank, wherein the bottom of the falling film absorber penetrates the top wall of the storage tank and extends into the liquid ammonia storage chamber, and an exhaust pipe is fixedly arranged on the top of the falling film absorber. In the specific working process, the ejector is used to form a vacuum to suck the tail gas into the ejector through the air intake port, and the ammonia in the tail gas is dissolved in water by using the property that ammonia is easily soluble in water, so that the ammonia in the tail gas is combined with the clean water in the ejector to generate low-concentration ammonia water. Since the working principle of the jet pump involves the rapid mixing of high-pressure fluid and low-pressure fluid. In this process, the speed, pressure and temperature of the two fluids may change, resulting in the precipitation of dissolved gas in the fluid and the formation of bubbles. On the one hand, bubbles accumulate in the liquid ammonia storage chamber to form froth. The bubbles carry a lot of ammonia. After being directly sprayed with the spray water produced by the falling film absorber, the discharged gas still carries a lot of ammonia. On the other hand, the mixed liquid sprayed by the jet pump will be directly discharged in the liquid ammonia storage chamber, resulting in a low overall ammonia absorption rate. Summary of the invention

[0004] The invention provides a spraying ammonia water absorption tower to solve the technical problem of low ammonia absorption rate in the process of premixing ammonia with a single jet pump in the prior art.

[0005] In order to solve the above problems, the present invention provides a spray-type ammonia water absorption tower adopts the following technical solution:

[0006] The invention comprises an absorption tower and a spray assembly arranged in the absorption tower, wherein the bottom end of the absorption tower is provided with a drain pipe, the top end of the absorption tower is provided with an exhaust port, the bottom fixed sleeve of the absorption tower is provided with an annular cover, a first mixing chamber is formed in the annular cover, a jet pump which leads into the first mixing chamber is fixedly provided on the annular cover, an annular baffle is provided in the first mixing chamber, an overflow channel is formed between the top end of the annular baffle and the top wall of the annular cover, an annular baffle extending downward is provided at the bottom end of the absorption tower, the annular baffle is spaced inside the annular baffle, a conical cover is provided inside the bottom end of the annular cover, a second mixing chamber is formed between the outer wall of the conical cover and the inner wall of the annular baffle, the drain pipe is provided in the conical cover and is used for discharging the second mixing chamber and the mixed liquid in the absorption tower.

[0007] The top end surface of the conical cover is located below the top end surface of the annular baffle, and the conical cover is located below the annular spoiler.

[0008] By adopting the above technical solution, the mixed gas to be treated containing ammonia is ejected by the jet pump and mixed with the high-speed fluid to form a mixed fluid. This process realizes the premixing effect and significantly improves the absorption rate of ammonia. The mixed fluid passes through the first mixing chamber and the second mixing chamber in sequence to gradually further improve the absorption rate of ammonia.

[0009] The large number of bubbles generated after being ejected by the jet pump will form floating foam. After passing through the overflow channel and contacting the mixed liquid in the second mixing chamber for absorption, the floating foam enters the absorption tower and gradually breaks up and is sprayed and absorbed by the spray component. The spraying effect of the spray component further promotes the breaking up and absorption of the floating foam, ensuring the efficient absorption of ammonia.

[0010] Furthermore, the top end of the annular baffle extends upwardly out of the bottom edge of the annular spoiler, and a buffer area is formed between the top side wall of the annular baffle and the bottom side wall of the annular spoiler.

[0011] With the above technical solution, the floating foam passing through the overflow channel will first enter the buffer area. The existence of the buffer area provides a buffer space for the floating foam, allowing it to temporarily stay here and partially dissipate, reducing the amount of floating foam that directly enters the absorption tower body. This helps to reduce the burden on the spray component and improve the spray efficiency.

[0012] Furthermore, the distance between the top surface of the conical cover and the bottom surface of the annular spoiler is L, and L is 1 cm-3 cm.

[0013] By adopting the above technical solution, a small slit is formed between the top surface of the conical cover and the bottom surface of the annular baffle. When the foam in the buffer zone enters the absorption tower, it needs to pass through the slit. The lower layer of the slit is the mixed liquid fluid of the second mixing chamber. On the one hand, when passing through the slit, the bubbles may be squeezed and broken into smaller bubbles, or even completely dissipated, so that the gas contacts the mixed liquid of the second mixing chamber, which is convenient for ammonia absorption. On the other hand, the mixed liquid fluid of the second mixing chamber will form a certain shear force on the bubbles. This shear force not only helps to further break the bubbles, but also promotes the mixing of gas and liquid, so that ammonia is dissolved in the mixed liquid more quickly. The mass transfer efficiency is improved and the absorption process of ammonia is accelerated.

[0014] Furthermore, a defoaming mechanism located above the annular cover is provided in the absorption tower, and the spray assembly is located above the defoaming mechanism.

[0015] Furthermore, the defoaming mechanism includes a defoaming component supported in the absorption tower by an annular support plate, the defoaming component includes folding plates distributed in a circular shape, annular brackets are provided at the upper and lower ends of the folding plates, and the defoaming component also includes a power component for driving the annular bracket to rotate.

[0016] With the above technical solution, the folding plate causes the bubbles to be hit and sheared multiple times when passing through the folding plate area. This physical action can effectively break the bubbles, refine them into smaller bubbles or make them dissipate directly. The contact area between the gas and the spray liquid is increased, the mass transfer efficiency is improved, and the absorption of ammonia is promoted.

[0017] The power assembly drives the annular bracket to rotate, and the folding plate rotates accordingly. This dynamic defoaming method is more effective than static defoaming. The rotational motion also increases the contact frequency and intensity between the bubbles and the folding plate, improving the defoaming efficiency.

[0018] Furthermore, the folding plates distributed in a circular shape are two groups that are spaced apart from each other, and an annular limiting plate is provided at the bottom end of the annular bracket located at the bottom and in the inner circle.

[0019] Furthermore, the annular bracket at the top of the folding plate is rotatably matched with the annular support plate, the power assembly includes a motor fixed on the annular support plate and a gear driven to rotate by the motor, and a toothed plate meshing with the gear is formed on the side wall of the annular bracket.

[0020] With the above technical solution, two groups of folded plates distributed in a circular shape are arranged in a spaced-apart manner, and the gap between the two groups of folded plates forms a defoaming area. When driven by the gears, the folded plates on one side of the defoaming area rotate clockwise, and the folded plates on the other side rotate counterclockwise. The rotation in opposite directions causes the bubbles to be subjected to shear and impact forces from different directions when passing through the defoaming area. This multi-directional mechanical action can more effectively break the bubbles, refine them into smaller bubbles or make them dissipate. It can more thoroughly eliminate the floating foam and bubbles in the spray tower.

[0021] Furthermore, the spray assembly comprises a spray pipe which penetrates the side wall of the absorption tower and is located above the annular support plate, and a plurality of spray heads are arranged on the spray pipe.

[0022] Furthermore, a louvered demister is provided in the absorption tower above the spray assembly.

[0023] By adopting the above technical solution, after the gas-liquid separation through the louver demister, the gas is discharged from the exhaust port, and the liquid on the louver demister drips, preventing the droplets in the gas from being discharged into the atmosphere.

[0024] The spray-type ammonia absorption tower provided by the present invention has the following beneficial effects: the mixed gas to be treated containing ammonia is ejected by a jet pump and mixed with a high-speed fluid to form a mixed fluid. This process realizes a premixing effect and significantly improves the absorption rate of ammonia. The mixed fluid passes through the first mixing chamber and the second mixing chamber in sequence to gradually further improve the absorption rate of ammonia.

[0025] The large number of bubbles generated after being ejected by the jet pump will form floating foam. After passing through the overflow channel and contacting the mixed liquid in the second mixing chamber for absorption, the floating foam enters the absorption tower and gradually breaks up and is sprayed and absorbed by the spray component. The spraying effect of the spray component further promotes the breaking up and absorption of the floating foam, ensuring the efficient absorption of ammonia.

[0026] The defoaming mechanism effectively removes bubbles and foam during the defoaming process, avoiding interference caused by foam during the spraying process. The presence of foam will reduce the effective area of ​​gas-liquid contact and reduce the absorption efficiency. Through defoaming, sufficient contact between the spray liquid and ammonia can be ensured, thereby improving the absorption efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0028] Figure 1 It is a structural schematic diagram of the spray-type ammonia water absorption tower of the present invention;

[0029] Figure 2 It is a schematic diagram of the internal structure of the spray-type ammonia water absorption tower of the present invention;

[0030] Figure 3 for Figure 2 A partial enlarged view of the middle area A;

[0031] Figure 4 It is a schematic diagram of the structure of the folding plate and the annular bracket in the present invention;

[0032] Figure 5 It is a top view of the cooperation between the annular support plate, the power assembly and the annular support in the present invention;

[0033] Figure 6 It is a structural schematic diagram of the cooperation between the annular support plate, the power assembly and the annular support in the present invention;

[0034] Figure 7 for Figure 6 A partial enlarged view of the middle area B;

[0035] Figure 8 It is a schematic diagram of the structure of the louvered plate demister in the present invention.

[0036] Description of reference numerals:

[0037] 1. Absorption tower; 11. Spray assembly; 111. Spray pipe; 12. Exhaust port; 13. Annular baffle; 14. Drain pipe; 2. Annular cover; 21. First mixing chamber; 22. Jet pump; 23. Annular baffle; 231. Buffer area; 24. Overflow channel; 25. Conical cover; 26. Second mixing chamber; 3. Defoaming mechanism; 31. Annular support plate; 32. Defoaming assembly; 321. Folding plate; 322. Annular bracket; 3221. Tooth plate; 323. Power assembly; 3231. Motor; 3232. Gear; 324. Annular limit plate; 4. Louver demister. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0039] Any number of elements in the drawings is for illustration and not limitation, and any naming is for distinction only and does not have any limiting meaning.

[0040] The principle and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0041] An embodiment of a spray-type ammonia water absorption tower provided by the present invention:

[0042] like Figures 1 to 8 As shown, it includes an absorption tower 1, a spray assembly 11, an annular cover 2, a defoaming mechanism 3 and a louvered demister 4.

[0043] The spray assembly 11 is arranged in the absorption tower 1, the annular cover 2 is fixedly sleeved at the bottom of the absorption tower 1, the defoaming mechanism 3 is arranged in the absorption tower 1 and is located below the spray assembly 11, and the louver plate demister 4 is arranged in the absorption tower 1 and is located above the spray assembly 11. A drain pipe 14 is arranged at the bottom end of the absorption tower 1, and an exhaust port 12 is arranged at the top end of the absorption tower 1.

[0044] The spray assembly 11 includes a spray pipe 111 penetrating the side wall of the absorption tower 1 and located above the annular support plate 31 , and a plurality of spray heads are disposed on the spray pipe 111 .

[0045] The gas to be treated containing ammonia enters from the annular cover 2 and then undergoes multi-stage treatment and mixing to improve the absorption rate of ammonia. The ammonia that has not been absorbed enters the absorption tower 1 and continues to be sprayed and absorbed. The mixed liquid that absorbs ammonia is discharged through the drain pipe 14, and other gases are discharged through the exhaust port 12.

[0046] A first mixing chamber 21 is formed in the annular cover 2, and a jet pump 22 is fixedly provided on the annular cover 2 and is introduced into the first mixing chamber 21. The mixed gas to be treated containing ammonia is ejected by the jet pump 22 and mixed with the high-speed fluid to form a mixed fluid. This process realizes the premixing effect and significantly improves the absorption rate of ammonia.

[0047] An annular baffle 23 is provided in the first mixing chamber 21, and the height of the annular baffle 23 is lower than that of the annular cover 2, so an overflow channel 24 is formed between the top of the annular baffle 23 and the top wall of the annular cover 2, and the mixed fluid passing through the jet pump 22 forms a reaction zone for the absorption of ammonia in the first mixing chamber 21, thereby improving the absorption rate of ammonia. The large number of bubbles generated after being ejected by the jet pump 22 will form floating foam, which will enter the absorption tower 1 through the overflow channel 24 and gradually break up and be sprayed and absorbed by the spray assembly 11. The spraying action of the spray assembly 11 further promotes the breaking up and absorption of the floating foam, thereby ensuring the efficient absorption of ammonia.

[0048] The bottom end of the absorption tower 1 is provided with an annular baffle 13 extending downward, and the annular baffle 13 is located inside the annular baffle 23 in the air. A conical cover 25 is provided inside the bottom end of the annular cover 2, and a second mixing chamber 26 is formed between the outer wall of the conical cover 25 and the inner wall of the annular baffle 23. The mixed fluid in the first mixing chamber 21 will enter the second mixing chamber 26 to further improve the absorption rate of ammonia.

[0049] The liquid discharge pipe 14 is specifically L-shaped, with a bottom end extending out of the conical cover 25 and disposed outside the conical cover 25 and used for discharging the mixed liquid in the second mixing chamber 26 and the absorption tower 1 .

[0050] The top surface of the conical cover 25 is below the top surface of the annular baffle 23. Specifically, the top of the annular baffle 23 extends upwardly out of the bottom edge of the annular baffle 13, and a buffer area 231 is formed between the top side wall of the annular baffle 23 and the bottom side wall of the annular baffle 13. The floating foam passing through the overflow channel 24 will first enter the buffer area 231. The existence of the buffer area 231 provides a buffer space for the floating foam, so that it can temporarily stay here and partially dissipate, reducing the amount of floating foam that directly enters the main body of the absorption tower 1. It helps to reduce the burden of the spray component 11 and improve the spray efficiency.

[0051] The conical cover 25 is located below the annular baffle 13. The distance between the top surface of the conical cover 25 and the bottom surface of the annular baffle 13 is L1, and L1 is 1.5 cm. The upper end surface of the conical cover 25 determines the liquid level of the second mixing chamber 26, and the distance between the bottom surface of the annular baffle 13 and the second mixing chamber 26 is L1. The distance L1 forms a small slit between the top surface of the conical cover 25, i.e., the liquid level of the second mixing chamber 26, and the bottom surface of the annular baffle 13. When the froth in the buffer area 231 enters the absorption tower 1, it needs to pass through the slit. The lower layer of the slit is the mixed liquid fluid of the second mixing chamber 26. On the one hand, when passing through the slit, the bubbles may be squeezed and broken into smaller bubbles, or even completely dissipated, so that the gas contacts the mixed liquid of the second mixing chamber 26, which is convenient for ammonia absorption. On the other hand, the mixed liquid fluid of the second mixing chamber 26 will form a certain shear on the bubbles. This shear force not only helps to further break up the bubbles, but also promotes the mixing of gas and liquid, allowing ammonia to dissolve more quickly in the mixed liquid, thereby improving mass transfer efficiency and accelerating the absorption process of ammonia.

[0052] In this embodiment, a defoaming mechanism 3 is provided above the annular cover 2 in the absorption tower 1, and a spray assembly 11 is located above the defoaming mechanism 3. The defoaming process effectively removes bubbles and foam, avoiding interference caused by foam during the spraying process. The presence of foam will reduce the effective area of ​​gas-liquid contact and reduce the absorption efficiency. By defoaming, sufficient contact between the spray liquid and ammonia can be ensured, thereby improving the absorption efficiency.

[0053] The defoaming mechanism 3 includes a defoaming assembly 32 supported in the absorption tower 1 by an annular support plate 31. The defoaming assembly 32 includes a circumferentially distributed folding plate 321. The upper and lower ends of the folding plate 321 are provided with annular brackets 322. The circumferentially distributed folding plates 321 are two groups of spaced-apart folding plates. The bottom end of the annular bracket 322 at the bottom and located in the inner circle is provided with an annular limiting plate 324.

[0054] The annular limiting plate 324 assists the foam formed by the bubbles to enter between the two folding plates 321. A small slit is formed between the annular limiting plate 324 and the conical cover 25, which ensures that the mixed liquid in the second mixing chamber 26 enters the conical cover 25 through the small hole and is discharged through the drain pipe 14, and prevents the foam formed by the bubbles from entering the conical cover 25.

[0055] The defoaming assembly 32 also includes a power assembly 323 for driving the annular bracket 322 to rotate. The annular bracket 322 at the top of the folding plate 321 is rotatably matched with the annular support plate 31. Specifically, the upper end surface of the annular bracket 322 at the top of the folding plate 321 is provided with a T-shaped block, and the lower surface of the annular support plate 31 adjacent thereto is provided with an annular T-shaped groove, and the T-shaped block is slidably matched in the T-shaped groove.

[0056] The inner wall of the bottom of the absorption tower 1 is provided with an annular partition, and the side of the annular bracket 322 at the bottom of the folded plate 321 and at the outer circle abuts against the inner side of the annular partition, so that the annular bracket 322 can rotate while avoiding a large gap between the annular bracket and the annular partition.

[0057] The power assembly 323 includes a motor 3231 fixed on the annular support plate 31 and a gear 3232 driven to rotate by the motor 3231. A tooth plate 3221 meshing with the gear 3232 is formed on the side wall of the annular support 322. The two groups of folding plates 321 distributed in a circular shape are set in space, and the gap between the two groups of folding plates 321 forms a defoaming area. When driven to rotate by the gear 3232, the folding plate 321 on one side of the defoaming area rotates clockwise, and the folding plate 321 on the other side rotates counterclockwise. The rotation in the opposite direction causes the bubbles to be subjected to shear and impact forces from different directions when passing through the defoaming area. This multi-directional mechanical action can more effectively break the bubbles, refine them into smaller bubbles or make them dissipate. It can more thoroughly eliminate the floating foam and bubbles in the spray tower.

[0058] In this embodiment, a louvered demister 4 is provided in the absorption tower 1 and is located above the spray assembly 11 .

[0059] In this embodiment, after the gas and liquid are separated by the louver demister 4, the gas is discharged from the exhaust port 12, and the liquid on the louver demister 4 drips to prevent the liquid droplets in the gas from being discharged into the atmosphere.

[0060] The louvered plate demister 4 comprises a conical air inlet, at the top of which two circular plates are arranged at intervals, and between the two circular plates there are louvers arranged at intervals.

[0061] When the spray-type ammonia water absorption tower of this embodiment is used, the mixed gas to be treated containing ammonia is injected by the jet pump 22 and mixed with the high-speed fluid to form a mixed fluid, wherein the high-speed fluid is water that absorbs ammonia. The mixed fluid enters the first mixing chamber 21 and flows over the annular baffle 23 into the second mixing chamber 26 when the liquid level gradually increases. When the liquid level in the second mixing chamber 26 gradually increases, it flows over the top of the conical cover 25, enters the conical cover 25 through the small hole, and is discharged through the drain pipe 14.

[0062] The large number of bubbles generated after being ejected by the jet pump 22 will form floating foam, which will enter the buffer area 231 through the overflow channel 24 as the liquid level rises in the first mixing chamber 21, and then pass through the upper liquid surface of the second mixing chamber 26 and the bottom end of the annular baffle 13 to enter between the inner wall of the annular baffle 13 and the outer wall of the annular limit plate 324, and gradually enter the defoaming area formed between the two groups of folding plates 321, and the gear 3232 rotates and drives the folding plate 321 to rotate, and the defoaming treatment is carried out to achieve a more complete release of the ammonia in the bubbles, so that the ammonia is sprayed through the spray assembly 11, and the absorption treatment of the ammonia is further improved. After the sprayed gas passes through the gas-liquid separation of the louver plate demister 4, the gas is discharged from the exhaust port 12, and the liquid on the louver plate demister 4 drips to prevent the droplets in the gas from being discharged into the atmosphere.

[0063] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "width", "horizontal", "top", "bottom", "inside", "outside" and the like, which indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the drawings of this specification, and are only for the purpose of facilitating the explanation of the scheme of the present invention and simplifying the description, rather than explicitly or implicitly indicating that the devices or elements involved must have the specific orientation, be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms cannot be understood or interpreted as limitations on the scheme of the present invention.

[0064] In addition, in the description of this specification, “plurality” means at least two, for example, two, three or more, etc., unless otherwise clearly and specifically defined.

Claims

1. A spray-type ammonia water absorption tower, comprising an absorption tower (1) and a spray assembly (11) arranged in the absorption tower (1), wherein a liquid discharge pipe (14) is arranged at the bottom end of the absorption tower (1), and an exhaust port (12) is arranged at the top end of the absorption tower (1), characterized in that: The bottom of the absorption tower (1) is provided with an annular cover (2) fixedly sleeved therein, a first mixing chamber (21) being formed in the annular cover (2), a jet pump (22) being fixedly provided on the annular cover (2) and being connected to the first mixing chamber (21), an annular baffle (23) being provided in the first mixing chamber (21), an overflow channel (24) being formed between the top of the annular baffle (23) and the top wall of the annular cover (2), an annular baffle (13) extending downwardly being provided at the bottom end of the absorption tower (1), the annular baffle (13) being spaced apart and located inside the annular baffle (23), a conical cover (25) being provided inside the bottom end of the annular cover (2), a second mixing chamber (26) being formed between the outer wall of the conical cover (25) and the inner wall of the annular baffle (23), the liquid discharge pipe (14) being provided in the conical cover (25) and being used for discharging the mixed liquid in the second mixing chamber (26) and the absorption tower (1); The top end surface of the conical cover (25) is located below the top end surface of the annular baffle (23), and the conical cover (25) is located below the annular spoiler (13).

2. The spray-type ammonia absorption tower according to claim 1, characterized in that: The top end of the annular baffle (23) extends upwards beyond the bottom edge of the annular spoiler (13), and a buffer area (231) is formed between the top side wall of the annular baffle (23) and the bottom side wall of the annular spoiler (13).

3. The spray type ammonia water absorption tower according to claim 2, characterized in that: The distance between the top end surface of the conical cover (25) and the bottom surface of the annular spoiler (13) is L1, and L1 is 1 cm-3 cm.

4. The spray-type ammonia absorption tower according to any one of claims 1 to 3, characterized in that: The absorption tower (1) is provided with a defoaming mechanism (3) located above the annular cover (2), and the spray assembly (11) is located above the defoaming mechanism (3).

5. The spray-type ammonia absorption tower according to claim 4, characterized in that: The defoaming mechanism (3) comprises a defoaming component (32) supported in the absorption tower (1) via an annular support plate (31); the defoaming component (32) comprises folding plates (321) distributed in a circumferential manner; annular brackets (322) are provided at both upper and lower ends of the folding plates (321); and the defoaming component (32) further comprises a power component (323) for driving the annular bracket (322) to rotate.

6. The spray-type ammonia water absorption tower according to claim 5, characterized in that: The folding plates (321) distributed in a circular shape are two groups that are spaced apart from each other, and an annular limiting plate (324) is provided at the bottom end of the annular bracket (322) located at the bottom and in the inner circle.

7. The spray-type ammonia absorption tower according to claim 6, characterized in that: The annular bracket (322) at the top end of the folding plate (321) is rotatably matched with the annular support plate (31); the power assembly (323) comprises a motor (3231) fixed on the annular support plate (31) and a gear (3232) driven to rotate by the motor (3231); and a toothed plate (3221) meshing with the gear (3232) is formed on the side wall of the annular bracket (322).

8. The spray-type ammonia water absorption tower according to claim 5, characterized in that: The spray assembly (11) comprises a spray pipe (111) penetrating the side wall of the absorption tower (1) and located above the annular support plate (31), and a plurality of spray heads are provided on the spray pipe (111).

9. The spray-type ammonia water absorption tower according to claim 4, characterized in that: The absorption tower (1) is provided with a louvered demister (4) located above the spray assembly (11).

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