Desulfurizing tower

Abstract

The utility model relates to the technical field of chemical equipment, and discloses a desulfurizing tower which comprises a tower bottom slurry oxidation section, a flue gas cooling and absorbing section, a flue gas spraying and dedusting section, a demisting section and a purified flue gas outlet section which are sequentially communicated from bottom to top. Wherein the tower bottom slurry oxidation section is provided with an oxidation tank, the flue gas cooling absorption section is sequentially provided with a flue gas inlet, a first flue gas distributor, a first spraying piece and a cyclone from bottom to top, the flue gas spraying dust removal section is sequentially provided with a second spraying piece and a second flue gas distributor from bottom to top, and the demisting section is provided with a demister and a third spraying piece. And the purified flue gas outlet section is provided with a flue gas outlet. Flue gas needs to pass through the first flue gas distributor and the second flue gas distributor when entering the desulfurization tower, the uniform diffusion effect on the flue gas can be effectively guaranteed, the flue gas can make full contact with desulfurization liquid and dust removal liquid, and therefore the desulfurization and dust removal efficiency is improved, and meanwhile blockage of a demisting device can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment, in particular to a desulfurization tower. Background Art

[0002] Limestone-gypsum wet desulfurization technology is currently the most mature desulfurization technology. It features high desulfurization efficiency, stable operation, and low operating costs. It also produces high-quality gypsum with a water content of 5% to 10%, making it widely used worldwide. Limestone desulfurization processes are typically implemented using a desulfurization tower. Flue gas enters the tower from the lower portion and comes into contact with an absorbent solution sprayed down from the upper portion. However, the flue gas in currently used desulfurization towers is often unevenly distributed, resulting in a small contact area with the absorbent solution. This results in poor desulfurization and dust removal, and can easily lead to blockage of the demisting device.

[0003] Therefore, a desulfurization tower is urgently needed to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a desulfurization tower, which can effectively increase the gas-liquid contact area, improve the desulfurization and dust removal efficiency, and avoid clogging of the demisting device.

[0005] As conceived above, the technical solution adopted by the utility model is:

[0006] Provided is a desulfurization tower, comprising a bottom slurry oxidation section, a flue gas cooling and absorption section, a flue gas spray dust removal section, a demisting section, and a clean flue gas outlet section, which are sequentially connected from bottom to top;

[0007] The slurry oxidation section at the bottom of the tower is provided with an oxidation tank, and the oxidation tank is used to accommodate the slurry;

[0008] The flue gas cooling and absorption section is provided with a flue gas inlet, a first flue gas distributor, a first spray element and a cyclone from bottom to top. The flue gas inlet is used to introduce flue gas into the desulfurization tower. The first flue gas distributor is used to evenly diffuse the flue gas. The first spray element is used to spray desulfurization liquid. The cyclone is used to perform gas-liquid separation on the flue gas carrying liquid droplets.

[0009] The flue gas spray dust removal section is provided with a second flue gas distributor and a second spraying member from bottom to top, the second spraying member is used to spray the dust removal liquid, and the second flue gas distributor is used to evenly diffuse the flue gas and receive the dust removal liquid;

[0010] The demisting section is provided with a demister and a third spraying element, the demister is used to remove droplets carried in the flue gas, and the third spraying element is used to flush the demister;

[0011] The clean flue gas outlet section is provided with a flue gas outlet, and the flue gas outlet is used to discharge the flue gas in the desulfurization tower.

[0012] Optionally, an oxidation gas collecting pipe and a slurry agitator are provided in the oxidation tank, the oxidation gas collecting pipe is used to introduce air into the oxidation tank, and the slurry agitator is used to stir the slurry in the oxidation tank.

[0013] Optionally, the oxidation gas collecting pipe includes an air inlet pipe and an air distribution pipe, the air inlet pipe is provided with an inlet and an outlet, the inlet is connected to an external air supply component, the outlet is connected to the air inlet of the air distribution pipe, the air distribution pipe includes a plurality of annular pipes, the annular pipes are provided with an air outlet, and the air outlet is used to introduce air into the oxidation tank.

[0014] Optionally, an inlet pipe is provided at the flue gas inlet, the inlet pipe extends into the desulfurization tower, and the extending direction of the inlet pipe forms a first angle a with the horizontal direction, 15°≤a≤30°.

[0015] Optionally, the first spray element includes a first lower spray layer, a first middle spray layer and a first upper spray layer arranged in sequence from bottom to top, the nozzles of the first lower spray layer and the first middle spray layer are non-atomizing nozzles, and the nozzle of the first upper spray layer is an atomizing nozzle.

[0016] Optionally, the second flue gas distributor includes a distributor body and a liquid collecting pipe. A distribution channel and a liquid collecting tank are provided on the distributor body. The distribution channel is used to evenly diffuse the flue gas. The liquid collecting tank is used to receive the dust removal liquid sprayed by the second spray part. One end of the liquid collecting pipe is connected to the liquid collecting tank, and the other end of the liquid collecting pipe extends out of the desulfurization tower.

[0017] Optionally, the distributor body includes a base, a plurality of through holes are provided on the base, a support sleeve is provided around the periphery of one of the through holes to form a flue gas channel, and the plurality of flue gas channels constitute the distribution channel;

[0018] The distributor body also includes a plurality of guide plates, each of which is a V-shaped structure. One guide plate is correspondingly arranged on one of the flue gas channels, and the open end of the V-shaped structure faces the side away from the flue gas channel. The projection of the guide plate in the vertical direction covers the opening of the flue gas channel.

[0019] Optionally, the second spray element includes a second lower spray layer and a second upper spray layer arranged in sequence from bottom to top, the demister is arranged between the second lower spray layer and the second upper spray layer, and the nozzles of the second lower spray layer and the second upper spray layer are both atomizing nozzles.

[0020] Optionally, the bottom slurry oxidation section includes a main section and a connecting section, the oxidation tank is arranged in the main section, the first end of the connecting section is connected to the main section, and the second end of the connecting section is connected to the flue gas cooling absorption section, and the cross-sectional area of the second end is smaller than the cross-sectional area of the first end.

[0021] Optionally, the clean flue gas outlet section is a conical structure, the large diameter end of the conical structure is connected to the demisting section, the small diameter end of the conical structure is provided with the flue gas outlet, an outlet pipe is provided at the flue gas outlet, and the outlet pipe extends in a horizontal direction.

[0022] The beneficial effects of the utility model are:

[0023] The desulfurization tower proposed by the utility model includes a tower bottom slurry oxidation section, a flue gas cooling and absorption section, a flue gas spray dust removal section, a mist removal section, and a clean flue gas outlet section, which are sequentially connected from bottom to top. Among them, the tower bottom slurry oxidation section is provided with an oxidation trough, which is used to accommodate slurry. The flue gas cooling and absorption section is sequentially provided with a flue gas inlet, a first flue gas distributor, a first spray element, and a cyclone from bottom to top. The flue gas inlet is used to introduce flue gas into the desulfurization tower, the first flue gas distributor is used to evenly diffuse the flue gas, the first spray element is used to spray desulfurization liquid, and the cyclone is used to perform gas-liquid separation on the flue gas carrying droplets. The flue gas spray dust removal section is sequentially provided with a second flue gas distributor and a second spray element from bottom to top. The second spray element is used to spray dust removal liquid, and the second flue gas distributor is used to evenly diffuse the flue gas and receive the dust removal liquid. The demister section is equipped with a demister and a third spray element. The demister is used to remove droplets carried in the flue gas and is located between the third spray elements, which are used to flush the demister. The clean flue gas outlet section is equipped with a flue gas outlet for exhausting flue gas from the tower body. The first and second flue gas distributors in this desulfurization tower effectively ensure uniform flue gas diffusion, ensuring sufficient contact between the flue gas and the desulfurization and dust removal liquids, thereby improving desulfurization and dust removal efficiency while also preventing clogging of the demister. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a partial structural diagram of a desulfurization tower provided by an embodiment of the present utility model;

[0025] Figure 2 This is a partial structural diagram of the second flue gas distributor provided by an embodiment of the present utility model;

[0026] Figure 3 This is a partial structural diagram of the oxidation gas collecting pipe provided by an embodiment of the utility model:

[0027] Figure 4 It is a partial structural diagram of the first spraying member provided in an embodiment of the present utility model.

[0028] In the picture:

[0029] 1. Slurry oxidation section at the bottom of the tower; 11. Slurry agitator; 12. Oxidation gas collecting pipe; 121. Gas inlet pipe; 122. Gas distribution pipe; 1221. Gas outlet;

[0030] 2. Flue gas cooling and absorption section; 201. Flue gas inlet; 21. First flue gas distributor; 22. First spray element; 221. First lower spray layer; 222. First middle spray layer; 223. First upper spray layer; 23. Cyclone;

[0031] 3. Flue gas spray dust removal section; 31. Second flue gas distributor; 311. Base; 3111. Bracket sleeve; 3112. Liquid receiving trough; 312. Guide plate; 313. Liquid collecting pipe; 32. Second spray element; 321. Second lower spray layer; 322. Second upper spray layer;

[0032] 4. Demisting section; 41. Demister; 42. Third spray element;

[0033] 5. Clean flue gas outlet section; 501. Flue gas outlet. DETAILED DESCRIPTION

[0034] To make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the present invention more clearly understood, the technical solutions of the present invention are further described below with reference to the accompanying drawings and through specific embodiments. It should be understood that the specific embodiments described herein are merely intended to explain the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of it.

[0035] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0036] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0037] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0038] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0039] like Figures 1 to 4 As shown, this embodiment provides a desulfurization tower comprising, from bottom to top, a tower bottom slurry oxidation section 1, a flue gas cooling and absorption section 2, a flue gas spray dust removal section 3, a demisting section 4, and a clean flue gas outlet section 5. The flue gas cooling and absorption section 2 is provided with a flue gas inlet 201, through which flue gas can enter the desulfurization tower, while the clean flue gas outlet section 5 is provided with a flue gas outlet 501, through which clean flue gas after desulfurization and dust removal can leave the desulfurization tower.

[0040] Specifically, the flue gas cooling and absorption section 2 is provided with a flue gas inlet 201, a first flue gas distributor 21, a first spray element 22, and a cyclone 23, sequentially from bottom to top. The flue gas inlet 201 is used to introduce flue gas into the desulfurization tower, the first flue gas distributor 21 is used to evenly diffuse the flue gas, and the first spray element 22 is used to spray the desulfurization liquid. In specific implementation, the flue gas will first pass through the first flue gas distributor 21 and be evenly divided during its flow from bottom to top, so that the flue gas is first evenly diffused before coming into contact with the desulfurization liquid, which can improve the desulfurization efficiency of the desulfurization tower. The desulfurization liquid can be limestone slurry. The limestone slurry from top to bottom contacts the flue gas from bottom to top, that is, the flue gas and limestone slurry flow in opposite directions, which facilitates full contact between the two. The limestone slurry will then fall into the oxidation tank of the slurry oxidation section 1 at the bottom of the tower for further reaction. After the flue gas contacts the limestone slurry, the flue gas that continues to flow upward will carry liquid droplets. The cyclone 23 can be used to separate the flue gas carrying liquid droplets into gas and liquid, so as to effectively reduce the water vapor in the flue gas after desulfurization.

[0041] The flue gas spray dust removal section 3 is provided with a second flue gas distributor 31 and a second spray element 32 from bottom to top. The second spray element 32 is used to spray the dust removal liquid, and the second flue gas distributor 31 is used to evenly diffuse the flue gas and receive the dust removal liquid. In specific implementation, after the flue gas is separated into gas and liquid, the flue gas flows in a cyclone shape. The second flue gas distributor 31 is provided to further evenly separate the flue gas, so that the flue gas is further evenly diffused. The dust removal liquid can be water. The water from top to bottom contacts the flue gas from bottom to top, which can intercept and wash particulate dust entrained in the rising flue gas, and at the same time remove sulfur trioxide entrained in the droplets. In addition, after the dust removal liquid contacts the flue gas above the second flue gas distributor 31, it can fall into the second flue gas distributor 31 instead of falling into the oxidation tank like the desulfurization liquid, so that the slurry volume in the oxidation tank is stable within a certain range, so that the limestone reaction in the oxidation tank proceeds normally.

[0042] The demister section 4 is provided with a demister 41 and a third spray element 42. The demister 41 is used to remove droplets carried in the flue gas. The third spray element 42 can flush the demister 41 when the demister 41 is not working to prevent the rising flue gas droplets from condensing on the demister 41 and affecting the demisting effect.

[0043] The desulfurization tower provided in this embodiment can effectively ensure the uniform diffusion effect of the flue gas by setting the first flue gas distributor 21 and the second flue gas distributor 31, so that the flue gas can fully contact with the desulfurization liquid and the dust removal liquid, thereby improving the desulfurization and dust removal efficiency, and also avoiding the blockage of the demisting device.

[0044] Optionally, the second flue gas distributor 31 includes a distributor body and a liquid collecting pipe 313. The distributor body is provided with a distribution channel and a liquid collecting tank 3112. The distribution channel runs through the distributor body so that the flue gas can flow through the distribution channel and pass through the distributor body, and evenly diffuses the flue gas passing through the distributor body. The liquid collecting tank 3112 is used to receive the dust removal liquid sprayed by the second spraying member 32 located above the distributor body, that is, the dust removal liquid and the flue gas come into contact above the distributor body. In addition, one end of the liquid collecting pipe 313 is connected to the liquid collecting tank 3112, and the other end of the liquid collecting pipe 313 extends outside the desulfurization tower. In other words, the dust removal liquid that falls into the liquid collecting tank 3112 can be discharged through the liquid collecting pipe 313 and flow into the circulating water storage tank outside the desulfurization tower.

[0045] Specifically, if Figure 2 As shown, the distributor body includes a base 311 and a guide plate 312. The base 311 is provided with multiple through-holes. A support sleeve 3111 is positioned around the periphery of each through-hole to form a flue gas channel. As flue gas flows through the second flue gas distributor 31, it must flow through multiple flue gas channels, which together constitute the distribution channel. Multiple guide plates 312 are also provided, each with a V-shaped structure. One guide plate 312 is positioned corresponding to a flue gas channel, with the open end of the V-shaped structure facing away from the flue gas channel, and the vertical projection of the guide plate 312 covers the flue gas channel opening. Therefore, as the dust removal liquid falls, some of the liquid will fall directly into the liquid receiving trough 3112, while the rest will fall into the V-shaped groove formed by the guide plate 312. Since the V-shaped groove is connected at both ends, the liquid accumulated in the V-shaped groove can flow back into the liquid receiving trough 3112 and then be discharged through the liquid collecting pipe 313.

[0046] Optionally, an oxidation collecting pipe 12 and a slurry agitator 11 are provided in the oxidation tank. The oxidation collecting pipe 12 is used to introduce air into the oxidation tank, and the slurry agitator 11 is used to stir the slurry in the oxidation tank. The air introduced into the oxidation tank by the oxidation collecting pipe 12 can further promote the oxidation reaction of the limestone slurry in the oxidation tank, thereby improving the desulfurization efficiency. The slurry agitator 11 is used to prevent the limestone slurry in the oxidation tank from producing solid sedimentation, thereby ensuring better uniform mixing of the limestone slurry and improving the desulfurization efficiency. In addition, a slurry circulation port is further provided on the side wall of the oxidation tank, and the slurry circulation port is connected to the first spray part 22 through a circulation pipe, so that the slurry in the oxidation tank can be recycled to the first spray part 22 for spraying as needed.

[0047] Specifically, if Figure 3As shown, the oxidation gas collection pipe 12 includes an air inlet pipe 121 and an air distribution pipe 122. The air inlet pipe 121 is provided with an inlet and an outlet. The inlet is connected to an external air supply assembly, and the outlet is connected to the air inlet of the air distribution pipe 122. The air distribution pipe 122 includes multiple annular tubes, each of which is provided with an air outlet 1221 for introducing air into the oxidation tank. The shape of the annular tubes is adapted to the inner wall of the oxidation tank, and the air outlets 1221 are evenly distributed on the annular tubes to ensure uniform air flow into the slurry.

[0048] Optionally, an inlet pipe is provided at the flue gas inlet 201. The inlet pipe extends at a first angle a with respect to the horizontal direction, 15°≤a≤30°. This allows the flue gas entering the desulfurization tower from the flue gas inlet 201 to first reach the bottom of the desulfurization tower and then return upward. Furthermore, extending the inlet pipe into the desulfurization tower effectively prevents slurry dripping from above from splashing or being sucked back into the inlet pipe, thereby causing siltation and compaction.

[0049] Optionally, the first spray element 22 includes a first lower spray layer 221, a first middle spray layer 222, and a first upper spray layer 223, arranged sequentially from bottom to top. The nozzles of the first lower spray layer 221 and the first middle spray layer 222 are both non-atomizing nozzles, while the nozzles of the first upper spray layer 223 are atomizing nozzles. In specific implementations, the first lower spray layer 221 and the first middle spray layer 222 both utilize large-diameter non-atomizing nozzles. Multiple large-diameter nozzles can form a multi-layer flat conical water curtain, which can reduce the flue gas temperature to saturation while washing large, high-concentration particulate matter. The first upper spray layer 223 utilizes atomizing nozzles with an outlet flow rate of approximately 10 m / s, a droplet diameter between 1.3 mm and 3.0 mm, a droplet residence time within the tower of 1 to 10 seconds, and a suspended state under certain conditions. In addition, the three spray layers can be arranged crosswise, for example, each spray layer can be rotated 120° along its own axis, so that the spray coverage rate can reach 200% to 300%.

[0050] Optionally, the second spray element 32 includes a second lower spray layer 321 and a second upper spray layer 322, arranged sequentially from bottom to top. The demister 41 is disposed between the second lower spray layer 321 and the second upper spray layer 322. The nozzles of the second lower spray layer 321 and the second upper spray layer 322 are both atomizing nozzles. The nozzles of the second lower spray layer 321 are arranged upward, while the nozzles of the second upper spray layer 322 are arranged downward to facilitate flushing of the demister 41. Preferably, the demister 41 is a two-stage demister to enhance the demisting effect on the flue gas.

[0051] Optionally, the bottom slurry oxidation section 1 includes a main section and a connecting section, the oxidation trough is provided in the main section, the first end of the connecting section is connected to the main section, and the second end of the connecting section is connected to the flue gas cooling and absorption section 2. The cross-sectional area of the second end is smaller than the cross-sectional area of the first end, that is, the connecting section has a conical structure. Because the solubility of lime is low, the bottom slurry oxidation section 1 has a larger cylinder diameter than the flue gas cooling and absorption section 2, the flue gas spray dust removal section 3, and the demisting section 4, so as to increase the volume of the oxidation trough and facilitate better dissolution of lime. During flue gas scrubbing, in order to maintain the stability of the pressure and flue gas flow rate in the desulfurization tower, it is not necessary to set a too large cylinder diameter. Therefore, the same cylinder diameter is maintained from the flue gas cooling and absorption section 2 where the flue gas inlet 201 is located to the demisting section 4.

[0052] Optionally, the clean flue gas outlet section 5 has a conical structure, with the larger diameter end of the conical structure connected to the demisting section 4, and the smaller diameter end of the conical structure providing a flue gas outlet 501. An outlet pipe is provided at the flue gas outlet 501, extending horizontally. After the flue gas passes through desulfurization and dust removal and flows into the clean flue gas outlet section 5, the flue gas flow rate at the flue gas outlet 501 can be further increased as the diameter of the clean flue gas outlet section 5 decreases, allowing the flue gas to be rapidly discharged from the desulfurization tower.

[0053] The above embodiments merely illustrate the basic principles and features of the present invention. The present invention is not limited to the above embodiments. Various changes and modifications are possible without departing from the spirit and scope of the present invention. Such changes and modifications are within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. Desulfurization tower, characterized in that: The invention comprises a tower bottom slurry oxidation section (1), a flue gas cooling absorption section (2), a flue gas spray dust removal section (3), a demisting section (4) and a clean flue gas outlet section (5) which are sequentially connected from bottom to top; The tower bottom slurry oxidation section (1) is provided with an oxidation tank, and the oxidation tank is used to accommodate the slurry; The flue gas cooling and absorption section (2) is provided with a flue gas inlet (201), a first flue gas distributor (21), a first spray element (22) and a cyclone (23) in sequence from bottom to top, the flue gas inlet (201) is used to introduce flue gas into the desulfurization tower, the first flue gas distributor (21) is used to uniformly diffuse the flue gas, the first spray element (22) is used to spray desulfurization liquid, and the cyclone (23) is used to perform gas-liquid separation on the flue gas carrying liquid droplets; The flue gas spray dust removal section (3) is provided with a second flue gas distributor (31) and a second spraying member (32) in sequence from bottom to top, the second spraying member (32) is used to spray the dust removal liquid, and the second flue gas distributor (31) is used to evenly diffuse the flue gas and receive the dust removal liquid; The demisting section (4) is provided with a demister (41) and a third spraying element (42), the demister (41) is used to remove liquid droplets carried in the flue gas, and the third spraying element (42) is used to flush the demister (41); The clean flue gas outlet section (5) is provided with a flue gas outlet (501), and the flue gas outlet (501) is used to discharge the flue gas in the desulfurization tower.

2. The desulfurization tower according to claim 1, characterized in that: An oxidation gas collecting pipe (12) and a slurry agitator (11) are arranged in the oxidation tank. The oxidation gas collecting pipe (12) is used to introduce air into the oxidation tank, and the slurry agitator (11) is used to stir the slurry in the oxidation tank.

3. The desulfurization tower according to claim 2, characterized in that: The oxidation gas collecting pipe (12) comprises an air inlet pipe (121) and an air distribution pipe (122); an inlet and an outlet are provided on the air inlet pipe (121); the inlet is communicated with an external air supply component; the outlet is communicated with the air inlet of the air distribution pipe (122); the air distribution pipe (122) comprises a plurality of annular pipes; an air outlet (1221) is provided on the annular pipes; the air outlet (1221) is used to introduce air into the oxidation tank.

4. The desulfurization tower according to claim 1, characterized in that An inlet pipe is provided at the flue gas inlet (201), and the inlet pipe extends into the desulfurization tower. The extending direction of the inlet pipe forms a first angle a with the horizontal direction, 15°≤a≤30°.

5. The desulfurization tower according to claim 1, characterized in that: The first spraying member (22) comprises a first lower spraying layer (221), a first middle spraying layer (222) and a first upper spraying layer (223) which are sequentially arranged from bottom to top; the spray heads of the first lower spraying layer (221) and the first middle spraying layer (222) are both non-atomizing spray heads, and the spray head of the first upper spraying layer (223) is an atomizing spray head.

6. The desulfurization tower according to claim 1, characterized in that: The second flue gas distributor (31) comprises a distributor body and a liquid collecting pipe (313). A distribution channel and a liquid receiving tank (3112) are provided on the distributor body. The distribution channel is used to evenly diffuse the flue gas. The liquid receiving tank (3112) is used to receive the dust removal liquid sprayed by the second spraying member (32). One end of the liquid collecting pipe (313) is connected to the liquid receiving tank (3112), and the other end of the liquid collecting pipe (313) extends out of the desulfurization tower.

7. The desulfurization tower according to claim 6, characterized in that: The distributor body comprises a base (311), a plurality of through holes are provided on the base (311), a support sleeve (3111) is provided around the periphery of one of the through holes to form a flue gas channel, and the plurality of flue gas channels constitute the distribution channel; The distributor body further comprises a plurality of guide plates (312), each of the guide plates (312) being a V-shaped structure, one guide plate (312) being correspondingly arranged on one of the flue gas channels, and an opening end of the V-shaped structure facing away from the flue gas channel, and a projection of the guide plate (312) in the vertical direction covering the opening of the flue gas channel.

8. The desulfurization tower according to claim 1, characterized in that: The second spraying member (32) comprises a second lower spraying layer (321) and a second upper spraying layer (322) arranged in sequence from bottom to top, the demister (41) is arranged between the second lower spraying layer (321) and the second upper spraying layer (322), and the spray heads of the second lower spraying layer (321) and the second upper spraying layer (322) are both atomizing spray heads.

9. The desulfurization tower according to any one of claims 1 to 8, characterized in that: The bottom slurry oxidation section (1) comprises a main section and a connecting section, the oxidation tank is arranged in the main section, the first end of the connecting section is connected to the main section, the second end of the connecting section is connected to the flue gas cooling absorption section (2), and the cross-sectional area of the second end is smaller than the cross-sectional area of the first end.

10. The desulfurization tower according to any one of claims 1 to 8, characterized in that: The clean flue gas outlet section (5) is a conical structure, the large diameter end of the conical structure is connected to the demisting section (4), the small diameter end of the conical structure is provided with the flue gas outlet (501), and an outlet pipe is provided at the flue gas outlet (501), and the outlet pipe extends in a horizontal direction.

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