Efficient desulfurizing tower

Abstract

The invention relates to the technical field of desulfurizing towers, and discloses an efficient desulfurizing tower, which comprises a tower body with a smoke inlet at the bottom, and a first spraying part, a rotational flow part and a demister are sequentially arranged in the tower body from bottom to top, the first spraying part comprises a main pipe communicated with external lime slurry, a plurality of branch pipes which are communicated with the main pipe and are distributed in a tree shape relative to the main pipe, a plurality of spray heads which are connected and communicated with the branch pipes, and spraying adjusting parts which are respectively arranged on the spray heads. The spray adjusting part is arranged on the spray head, so that lime slurry can be sprayed downwards and dispersed from the interior of the spray head when the flue gas amount is small, the speed is low and the airflow power is small; when the flue gas amount is increased, the airflow speed is increased, and the airflow power is large, the airflow power pushes the spraying adjusting part to move so as to increase the spraying direction and position of the lime slurry, so that the spraying direction and height of part of the lime slurry are changed, the flue gas and the lime slurry are in multiple contact, and the purification effect of the flue gas is improved.

Description

Technical Field

[0001] The invention relates to the technical field of desulfurization towers, and in particular to a high-efficiency desulfurization tower. Background Art

[0002] With the development of equipment and the continuous progress of science and technology, people are becoming more and more aware of environmental protection. In the process of industrial coal combustion, flue gas is inevitably generated for emission. Coal-fired flue gas generally contains more dust, sulfide gas and greenhouse gas. Therefore, it is usually necessary to purify the flue gas when it is discharged, and purify the harmful substances in the flue gas to the maximum extent before discharging. However, the existing coal-fired flue gas is generally desulfurized by wet method when it is purified, and the desulfurization dilution liquid is directly sprayed to absorb the sulfide gas in the flue gas, so as to achieve the desulfurization effect. That is, by spraying lime slurry on the flue gas, the sulfur dioxide in the flue gas reacts with the calcium ions in the lime slurry to form calcium sulfite, which is then oxidized by oxygen to form calcium sulfate. The spray device for spraying lime slurry usually sprays downward, and the flue gas mixes with the lime slurry sprayed from the spray device during the upward process from the bottom of the spray device to react, but the direction of the airflow during the rising process of the flue gas is usually vertically upward. When the flue gas speed is slow, the mixing effect of the lime slurry and the flue gas is relatively good, and when the flue gas speed is fast, the contact time between the flue gas and the lime slurry is shorter, the reaction effect on the harmful substances in the flue gas will be relatively worse, and the effect of removing the harmful substances will be relatively poor. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a high-efficiency desulfurization tower to solve the problem that the desulfurization effect of the desulfurization tower on flue gas is greatly affected by the size and velocity of the flue gas.

[0004] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide a high-efficiency desulfurization tower including a tower body with a smoke inlet at the bottom, wherein a first spray part, a swirl part and a demister are arranged in sequence from bottom to top in the tower body, wherein the first spray part includes a main pipe connected to external lime slurry, a plurality of branch pipes connected to the main pipe and distributed in a tree shape relative to the main pipe, a plurality of nozzles connected and connected to the branch pipes, and a spray adjustment part arranged on each nozzle, wherein the spray adjustment part can change the spraying of lime slurry according to the change of the size of flue gas airflow, so as to increase the spraying direction of lime slurry when the airflow velocity is fast and the airflow thrust is sufficient, thereby realizing multi-directional and multi-angle injection, ensuring that the flue gas is in more sufficient contact with the lime slurry, and improving the purification effect.

[0005] Furthermore, the nozzle includes a liquid outlet pipe with one end connected to the corresponding branch pipe and a first nozzle connected to the other end of the liquid outlet pipe. The liquid outlet pipe is arranged to extend downward in a vertical direction, and a liquid outlet secondary hole is formed on the side wall of the liquid outlet pipe. The spray adjustment part is slidably installed on the liquid outlet pipe in the vertical direction and opens and closes the liquid outlet secondary hole, thereby realizing the change of spray direction as needed to adapt to different situations.

[0006] Furthermore, the spray adjustment part includes a sleeve slidably mounted on the liquid outlet pipe in a vertical direction and blades formed on the sleeve and distributed in a spiral shape. The sleeve is made of a lightweight material, and an annular cavity is recessed around the inner wall of the sleeve facing the liquid outlet pipe, and a plurality of connected annular cavities facing different flow channels are opened on the outer wall of the sleeve; the blades have a laterally extending flat section and an arc section that bends and tilts from the flat section toward the first nozzle side. When the flue gas flow reaches a certain pressure, the sleeve is pushed to move upward through contact with the flat section of the blade until the annular cavity connects to the liquid outlet secondary hole, so that the sleeve can be pushed upward when the flue gas flow reaches a certain power until the liquid outlet secondary hole is aligned with its annular cavity, so that only the lime slurry sprayed downward is sprayed from the flow channel through the liquid outlet secondary hole, thereby causing the lime slurry to be sprayed from different heights and directions, thereby increasing the purification effect of the flue gas.

[0007] Furthermore, the sleeve is rotatably mounted on the liquid outlet pipe, each of the flow channels is arc-shaped and spirally distributed, and a second nozzle is provided on one end of each flow channel away from the liquid outlet pipe, so that after the sleeve rotates, the centrifugal force can promote the output of the lime slurry in the flow channel to a certain extent.

[0008] Furthermore, each of the curved segments intersects with the spraying direction of the lime slurry output from each second nozzle, so that part of the sprayed lime slurry is further dispersed by the curved segment after hitting the curved segment, thereby improving the purification effect.

[0009] Furthermore, a connecting block is provided on one end of the liquid outlet pipe close to the first nozzle, and a first bearing is provided on the connecting block and is connected to the sliding sleeve so that the sliding sleeve can rotate relative to the liquid outlet pipe. A plurality of grooves are concavely provided on the side surface of the sliding sleeve facing the connecting block, and an elastic member is vertically arranged in each of the grooves, and two ends of the elastic member are respectively connected to the inner wall of the groove and the first bearing, and the elastic member and the sliding sleeve rotate synchronously with the first bearing to limit the sliding position of the sliding sleeve to a certain extent after the sliding sleeve is pushed upward by the flue gas power.

[0010] Furthermore, the swirl part includes a first connecting plate sealed and connected in the inner cavity of the tower body and a plurality of enhancers evenly distributed on the bottom surface of the first connecting plate, each of the enhancers passes through the first connecting plate in a vertical direction, and the enhancers are used to change the airflow direction when the flue gas passes through, so as to further enhance the full reaction of the flue gas.

[0011] Furthermore, the enhancer includes an outer tube connected to the first connecting plate and passing through vertically, and a plurality of spoiler sheets arranged in the outer tube and distributed in a spiral pattern. The smoke contacts the spoiler sheets to stir the airflow direction of the smoke, thereby increasing the residence time of the smoke.

[0012] Furthermore, the enhancer also includes at least one middle tube and an inner tube which are coaxially and spaced apart from each other on the inner side of the outer tube to divide the outer tube into at least two annular spoiler cavities, each of which passes through the first connecting plate, and the spoilers are arranged in a plurality of groups corresponding to the spoiler cavities and are spirally arranged in each spoiler cavity to enhance the spoiler effect of the enhancer.

[0013] Furthermore, a second spraying part having the same structure as the first spraying part is provided between the cyclone part and the demister, thereby increasing the spraying amount of the lime slurry at the same time and realizing secondary spray purification.

[0014] The high-efficiency desulfurization tower of the present invention has at least the following beneficial effects: by arranging a spray regulating part on the nozzle, when the flue gas volume is small, the speed is slow, and the airflow dynamics is small, the lime slurry is only sprayed downward from the nozzle and dispersed to form a conical spray range, thereby mixing and reacting the flue gas at this time; when the flue gas volume increases, the airflow speed becomes faster and the airflow dynamics become larger, the airflow dynamics pushes the spray regulating part to move and increase the injection direction and position of the lime slurry, thereby changing the injection direction and height of part of the lime slurry, so that the flue gas and the lime slurry have multiple contacts to enhance the flue gas purification effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0016] Figure 1 It is a structural schematic diagram of a high-efficiency desulfurization tower of the present invention;

[0017] Figure 2 It is a front cross-sectional view of a high-efficiency desulfurization tower of the present invention;

[0018] Figure 3 It is a structural schematic diagram of the demister of the present invention;

[0019] Figure 4 It is a structural schematic diagram of the first spray part of the present invention;

[0020] Figure 5 It is a front cross-sectional view of the cooperation between the spray head and the spray adjustment part of the present invention;

[0021] Figure 6It is a top cross-sectional view of the cooperation between the spray head and the spray adjustment part of the present invention;

[0022] Figure 7 It is a structural schematic diagram of the swirl portion of the present invention;

[0023] Figure 8 for Figure 7 Magnified view of part A shown.

[0024] The meanings of the symbols in the accompanying drawings are:

[0025] Tower body-1; smoke inlet-11; chimney-12; first spray part-2; main pipe-21; branch pipe-22; nozzle-23; liquid outlet pipe-231; first pipe section-2311; second pipe section-2312; liquid outlet secondary hole-2313; connecting end-2314; first nozzle-232; spray adjustment part-24; sliding sleeve-241; rolling groove-2411; blade-242; flat section-24 21; curved segment-2422; annular cavity-243; flow channel-244; second nozzle-245; connecting block-2461; first bearing-2462; groove-2463; elastic member-2464; swirl part-3; first connecting plate-31; enhancer-32; outer tube-321; spoiler-322; middle tube-323; inner tube-324; second spray part-4; demister-5. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] like Figures 1 to 8 As shown, the high-efficiency desulfurization tower of the present invention comprises a tower body 1 with a smoke inlet 11 at the bottom, a first spray part 2, a cyclone part 3, a second spray part 4 and a demister 5 arranged in the tower body 1, wherein the first spray part 2, the cyclone part 3, the second spray part 4 and the demister 5 are arranged in sequence from bottom to top; the smoke inlet 11 allows the smoke to enter the tower body 1, and the height of the smoke inlet 11 is lower than the first spray part 2, so that the smoke enters the tower body 1 and rises upward and passes through the first spray part 2, the cyclone part 3, the second spray part 4 and the demister 5 in sequence, and then is output from the top of the tower body 1, and the first spray part 2, the cyclone part 3, the second spray part 4 and the demister 5 are sequentially arranged. The first spraying part 2 and the second spraying part 4 are both used to spray lime slurry into the tower body 1, so that the sulfur dioxide in the flue gas can react with the calcium ions in the lime slurry to form calcium sulfite. The flue gas passing through the first spraying part 2 then passes through the cyclone part 3. The cyclone part 3 changes the direction of the airflow so that the calcium sulfite in the flue gas can be more fully in contact with the air and oxidized to form calcium sulfate, thereby purifying the harmful substance sulfur dioxide in the flue gas and achieving the purpose of desulfurization. The demister 5 is used to better remove the water vapor carried in the flue gas, so that the purified flue gas can be output from the top of the tower body 1, completing the preliminary purification of the flue gas.

[0028] In this embodiment, the smoke inlet 11 of the tower body 1 is arranged at the bottom of the tower body 1, and the smoke inlet 11 penetrates the side wall of the tower body 1. In order to facilitate the installation of the tower body 1 and each part, the tower body 1 is formed by connecting multiple tower sections in sequence along the vertical direction, and the adjacent tower sections are sealed and connected. The bottom of the tower section at the bottom is sealed and the top is open, while the other tower sections are penetrated along the vertical direction, and the smoke inlet 11 is arranged on the side wall of the bottom tower section. The second tower section at the top is in a trumpet shape and is narrow at the top and wide at the bottom. The first tower section at the top and other tower sections can be cylindrical tubular structures. The diameter of the first tower section at the top is the same as the narrow end diameter of the second tower section at the top. The first tower section at the top is defined as the chimney 12 of the tower body 1, so that the flue gas after desulfurization can be output therefrom. The cooperation between the chimney 12 and the second tower section at the top can increase the flow rate of the flue gas output from the chimney 12 section according to the Venturi principle, improve the airflow dynamics, and facilitate the subsequent flue gas purification treatment.

[0029] In this embodiment, at least one first spraying part 2 is provided and arranged in the tower body 1 at intervals along the vertical direction. The first spraying part 2 includes a main pipe 21 connected to the external lime slurry, a plurality of branch pipes 22 connected to the main pipe 21 and distributed in a tree shape relative to the main pipe 21, a plurality of nozzles 23 connected and connected to each branch pipe 22, and a spraying regulating part 24 provided on each nozzle 23. The main pipe 21 is convenient for connecting with the source pipeline of the external lime slurry, and each branch pipe 22 is convenient for distributing the lime slurry in various directions and positions when outputting the lime slurry and spraying the lime slurry downward from different positions through the nozzle 23. The spraying regulating part 24 changes the spraying range of the lime slurry according to the airflow size of the flue gas and driven by the airflow power of the flue gas. For a small amount of flue gas, the flue gas flow rate is usually slightly larger than that of a large amount of flue gas. The spray regulating part 24 is slow and the corresponding air dynamics are low. For this reason, the spray regulating part 24 does not work temporarily, and the flue gas is only mixed with the lime slurry sprayed from the nozzle 23 to react with more than 90% of the sulfur dioxide in the flue gas; when the flue gas volume increases, the flue gas flow rate increases and the dynamics increase, the rising airflow drives the spray regulating part 24 to move upward, so that the spray regulating part 24 increases the output position and direction of the lime slurry, so that part of the flue gas that does not have time to react with the lime slurry continues to pass through the increased spray range of the spray regulating part 24 after passing through the spray range of the nozzle 23, thereby increasing the treatment effect on the sulfur dioxide in the flue gas, thereby being able to automatically adapt the corresponding spray range according to the flue gas flow rate to improve the desulfurization effect.

[0030] In the content defined in this embodiment, the main pipe 21 includes at least two sections of secondary pipes, each of which is sealed and connected in sequence, and the diameters of each secondary pipe from one end connected to the external lime slurry pipeline to one end extending into the tower body 1 are from large to small, that is, the diameter of the secondary pipe close to the external lime slurry pipeline is larger than the diameter of the secondary pipe close to the tower body 1, and the connection between any adjacent secondary pipes is a truncated cone tube structure, so that the lime slurry increases its flow rate according to the Venturi principle when entering the next secondary pipe, thereby ensuring that the pressure of the lime slurry output by the branch pipe 22 from the secondary pipe at each position is sufficient. In the content defined in this embodiment, each branch pipe 22 is symmetrically connected to each secondary pipe and arranged in parallel with each other, and each main pipe 21 has the same structure as the main pipe 21 and the diameter gradually decreases from one side of the main pipe 21 to the side away from the main pipe 21, so as to ensure the relative balance of pressure.

[0031] In the content defined in this embodiment, a plurality of nozzles 23 are arranged on each branch pipe 22, and the plurality of nozzles 23 are evenly arranged to ensure that each nozzle 23 can cover the inner cavity of the tower body 1, thereby ensuring the desulfurization effect on the flue gas. Each nozzle 23 includes a liquid outlet pipe 231 connected to the corresponding branch pipe 22 at one end and a first nozzle 232 connected to the other end of the liquid outlet pipe 231. The liquid outlet pipe 231 includes a first pipe section 2311 connected to the branch pipe 22 and parallel to the main pipe 21 in the horizontal direction, and a second pipe section 2312 connected to the first pipe section 2311 and extending downward in the vertical direction. The position of each first pipe section 2311 is set according to the inner cavity of the tower body 1, including the adjustment of the length and position, and the length and position of the corresponding branch pipe 22 are also adjusted accordingly. A liquid outlet secondary hole 2313 is formed through the side wall of the second pipe section 2312 of the liquid outlet pipe 231. The liquid outlet secondary hole 2313 is spaced a certain distance from the first nozzle 232 and is located above the first nozzle 232, so that the lime slurry can be output from the first nozzle 232 and the liquid outlet secondary hole 2313 respectively after output. The opening direction of the liquid outlet secondary hole 2313 is opened along the radial direction of the second pipe section 2312, and can also be opened in other directions. The spray adjustment part 24 is slidably installed on the liquid outlet pipe 231 in the vertical direction to block the liquid outlet secondary hole 2313 or open the liquid outlet secondary hole 2313 to realize the opening and closing of the liquid outlet secondary hole 2313. The first nozzle 232 is arranged on the bottom end of the second pipe section 2312 and sprays downward. The spray ranges of adjacent first nozzles 232 are connected to each other to ensure a more comprehensive coverage of the inner cavity of the tower body 1. It should be noted that the spray head 23 may be any conventional spray head 23 .

[0032] In the content defined in this embodiment, the number of spray adjustment parts 24 and liquid outlet pipes 231 corresponds to each other, and each spray adjustment part 24 is arranged on the second pipe section 2312 of the liquid outlet pipe 231 (hereinafter referred to as "liquid outlet pipe 231"). Each spray adjustment part 24 includes a sliding sleeve 241 slidably sleeved on the liquid outlet pipe 231 along the vertical direction and blades 242 formed on the sliding sleeve 241. Each blade 242 is distributed in an annular array and is spiral. When the airflow power brought by the flue gas is sufficient, the flue gas from bottom to top can push the sliding sleeve 241 to slide upward through the resistance between the flue gas and the blades 242 until the liquid outlet secondary hole 2313 is opened to allow the lime slurry to be discharged from the liquid outlet secondary hole 2313. In this embodiment, the sliding sleeve 241 is made of a light material such as polycarbonate PC material, or directly made of high temperature resistant glass, so that the glass is hollow inside and open at the bottom, and the blades 242 are attached to its outer wall by bonding, and its internal structure is attached to its inside by bonding, so as to ensure that the overall weight of the sliding sleeve 241 is sufficient to be supported by the high flow rate of smoke. An annular cavity 243 is concavely provided around the inner wall of the sliding sleeve 241 facing the liquid outlet pipe 231, and a convex ring is convexly provided on the inner wall of the sliding sleeve 241 on the upper and lower sides of the annular cavity 243, and the convex ring is semi-spherical on the side facing the liquid outlet pipe 231 and slides against the outer wall of the liquid outlet pipe 231, so as to achieve a seal between the two convex rings to a certain extent. A linear bearing (not shown in the figure) can be provided on the inner side wall of the sliding sleeve 241, so that the liquid outlet pipe 231 can be slidably penetrated in the linear bearing, and the sliding sleeve 241 and the liquid outlet pipe 231 can be slidably matched. The presence of the linear bearing should not affect the sealing of the convex ring and the setting of the annular cavity 243. A rotary bearing (not shown in the figure) is sleeved on the linear bearing, and the linear bearing is fixedly connected to the inner ring part of the rotary bearing, while the sliding sleeve 241 is fixedly connected to the outer ring part of the rotary bearing, so that the sliding sleeve 241 can rotate around the central axis relative to the linear bearing and the liquid outlet pipe 231 while sliding in the vertical direction according to the linear bearing relative to the liquid outlet pipe 231. The blade 242 has a flat section 2421 extending laterally from the top of the sleeve 241 and a curved section 2422 that bends and tilts from the flat section 2421 toward one side of the first nozzle 232. The blades 242 are distributed in a circular array and are spirally shaped, so that when the flue gas airflow reaches a certain power, it contacts the flat section 2421 of the blade 242 and pushes the sleeve 241 to move upward until the annular cavity 243 is connected to the liquid outlet secondary hole 2313. The airflow power of the flue gas can also cooperate with the curved section 2422 to push the blade 242 to move to a certain extent, thereby causing the sleeve 241 to rotate.It should be noted that although the curved segment 2422 may affect the coordination of the airflow and the flat segment 2421 to a certain extent, when the airflow power is sufficient, it can also ensure that the sliding sleeve 241 rises and rotates at the same time; the existence of the flat segment 2421 and the curved segment 2422 can also disturb the direction of the airflow to a certain extent, thereby increasing the residence time and direction of the flue gas, thereby increasing the reaction amount of sulfur dioxide in the flue gas and the lime slurry, and greatly improving the desulfurization and purification effect. In another embodiment, the blade 242 may also include only the flat segment 2421 to ensure the rise of the sliding sleeve 241.

[0033] In this embodiment, a plurality of communicating annular cavities 243 and flow channels 244 facing different directions are provided on the outer wall of the sleeve 241. Each flow channel 244 is provided on the sleeve 241 in an annular array, so that each flow channel 244 can be located at the same height, or each flow channel 244 can be bent at different heights at one end away from the liquid outlet pipe 231. Each flow channel 244 is arc-shaped and spirally distributed. A second nozzle 245 is provided at one end away from the liquid storage pipe. The output spray direction of the lime slurry by the second nozzle 245 is within 45° of the angle between the output point of the flow channel 244 and the tangent of the sleeve 241, so that each flow channel 244 forms a centrifugal force when outputting the lime slurry and increases the output pressure of the lime slurry, ensuring that the lime slurry passing through the second nozzle 245 is better sprayed out, and the pressure is sufficient to ensure that the spray range is sufficient, thereby increasing the output of the lime slurry without increasing the number of sprays 23. Preferably, the number of the flow channels 244 is consistent with the number of the blades 242, and each curved segment 2422 may be correspondingly provided with at least one flow channel 244, therefore, the flow channels 244 may be provided as at least one group, and each group of flow channels 244 is provided in the sliding sleeve 241 along the vertical direction and parallel to each other. Each curved segment 2422 intersects with the injection direction of the lime slurry output from each second nozzle 245, respectively, so that part of the lime slurry output from the flow channel 244 can be injected on the curved segment 2422, thereby changing the direction of part of the lime slurry, and causing it to collide with the curved segment 2422 and further disperse, thereby increasing the distribution range of the lime slurry. Preferably, a connection block 2461 is fixedly provided on one end of the liquid outlet pipe 231 close to the first nozzle 232, and a first bearing 2462 connected to the sleeve 241 is provided on the connection block 2461 so that the sleeve 241 can rotate relative to the liquid outlet pipe 231. The first bearing 2462 is coaxial with the liquid outlet pipe 231 and the inner ring is fixedly connected to the liquid outlet pipe 231. The sleeve 241 and the first bearing 2462 are not connected and are independent of each other. A plurality of grooves 2463 are concavely provided on one side of the sleeve 241 facing the connection block 2461, and the grooves 2463 are specifically provided in at least three forms, and each groove 2463 is arranged in a ring array around the liquid outlet pipe 231.An elastic member 2464 is vertically arranged in each groove 2463. The elastic member 2464 can be a spring. The two ends of the elastic member 2464 are respectively connected to the inner wall of the groove 2463 and the outer ring of the first bearing 2462, so that the elastic member 2464 and the sleeve 241 can rotate synchronously relative to the first bearing 2462. The spring is made of elastic metal with a small diameter such as 0.5 mm. When the sleeve 241 contacts the first bearing 2462, the spring is in a compressed state (or normal state). When the smoke is sufficient to push the sleeve 241 to move, the spring gradually stretches with the movement of the sleeve 241, and is in a normal state (or stretched state) when the annular cavity 243 is against its liquid outlet secondary hole 2313. When in the normal state, the spring cooperates with the smoke to slightly support the sleeve 241. When in the stretched state, the spring can pull the sleeve 241 to a certain extent. It should be noted that a hemispherical rolling groove 2411 may be provided on the top of the sliding sleeve 241, and a spherical connecting end 2314 may be provided on the top of the second pipe section 2312 of the liquid outlet pipe 231. When the annular cavity 243 of the sliding sleeve 241 is aligned with the liquid outlet secondary hole 2313, the connecting end 2314 is located in the rolling groove 2411, and the outer surface of the connecting end 2314 is smoothly provided to limit the sliding sleeve 241 from continuing to move and affecting the output of the lime slurry in the liquid outlet secondary hole 2313. In another embodiment, the spring may not be connected to the first bearing 2462.

[0034] In this embodiment, the cyclone portion 3 includes a first connecting plate 31 sealed and connected to the inner cavity of the tower body 1 and a plurality of enhancers 32 uniformly distributed on the bottom surface of the first connecting plate 31. Through holes are vertically opened on the first connecting plate 31 and at positions corresponding to each enhancer 32. Each enhancer 32 is connected to the through hole in the vertical direction to relatively penetrate the first connecting plate 31. The enhancer 32 is used to change the airflow direction when the flue gas passes through, increase the contact between the flue gas and the air, thereby ensuring that the calcium sulfite generated after the reaction with the lime slurry is oxidized into calcium sulfate, thereby achieving the purpose of desulfurization.

[0035] In the content defined in this embodiment, the first connecting plate 31 is a circular sheet structure, and the enhancer 32 includes an outer tube 321 connected to the first connecting plate 31 and vertically passing through, and a spoiler 322 arranged in the outer tube 321 and spirally distributed. The outer tube 321 is connected to the corresponding through hole so that the flue gas after the reaction of the lime slurry passes through the outer tube 321 and through the hole. The spoiler 322 collides with the flue gas when passing through and changes the direction of the airflow, so that the flue gas forms turbulence and increases the residence time, reduces the flow rate, and is more fully mixed with the air. Preferably, the booster 32 also includes at least one middle tube 323 and an inner tube 324 which are coaxially and spaced from each other on the inner side of the outer tube 321 to divide the outer tube 321 into at least two annular flow disturbance chambers. In this embodiment, the middle tube 323 is set as one, and there is a flow disturbance chamber between the middle tube 323 and the outer tube 321, and between the middle tube 323 and the inner tube 324. If there are two or more middle tubes 323, a flow disturbance chamber is also formed between two adjacent middle tubes 323. Each flow disturbance chamber has a through hole to penetrate the first connecting plate 31. The spoiler 322 is set as a plurality of groups corresponding to the flow disturbance chamber and is spirally arranged in each flow disturbance chamber. The outer tube 321, the middle tube 323 and the inner tube 324 are connected by the spoiler 322, and each spoiler 322 is inclined relative to the vertical direction to achieve a flow disturbance effect.

[0036] In this embodiment, the demister 5 uses an existing structure, and may have a plurality of bent demister plates or a demister pipe with a plurality of alternately inclined baffles disposed therein.

[0037] In this embodiment, the second spray part 4 has the same structure as the first spray part 2 , and the second spray part 4 can spray lime slurry or air to increase the amount of oxygen in the tower body 1 .

[0038] One embodiment of the high-efficiency desulfurization tower of the present invention works as follows: the flue gas enters the inner cavity of the tower body 1 through the smoke inlet 11, and the first spray part 2 sprays lime slurry through the first nozzle 232. The flue gas floats upward and passes through the first spray part 2, so that the sulfur dioxide in the flue gas reacts with the lime slurry to form calcium sulfite, and then cooperates with the sliding sleeve 241 according to the airflow dynamics of the flue gas. Subsequently, the flue gas passes through the cyclone part 3 and contacts with the air in the turbulence cavity to oxidize the calcium sulfite into calcium sulfate, and then continues to rise and passes through the injection area of ​​the second injection part, and finally passes through the demister 5 to remove water vapor and the like in the flue gas, thereby completing the preliminary desulfurization.

Claims

1. A high-efficiency desulfurization tower, comprising a tower body with a smoke inlet at the bottom, wherein a first spraying part, a cyclone part and a demister are sequentially arranged in the tower body from bottom to top, characterized in that: The first spraying part includes a main pipe connected to external lime slurry, a plurality of branch pipes connected to the main pipe and distributed in a tree shape relative to the main pipe, a plurality of nozzles connected and connected to the branch pipes, and a spray regulating part arranged on each nozzle. The spray regulating part can change the spraying of the lime slurry according to the change of the size of the flue gas flow.

2. The high-efficiency desulfurization tower according to claim 1, characterized in that: The nozzle includes a liquid outlet pipe with one end connected to the corresponding branch pipe and a first nozzle connected to the other end of the liquid outlet pipe. The liquid outlet pipe is arranged to extend downward in a vertical direction, and a liquid outlet secondary hole is formed on the side wall of the liquid outlet pipe. The spray adjustment part is slidably installed on the liquid outlet pipe in the vertical direction and opens and closes the liquid outlet secondary hole.

3. The high-efficiency desulfurization tower according to claim 2, characterized in that: The spray adjustment part includes a sleeve slidably mounted on the liquid outlet pipe in a vertical direction and blades formed on the sleeve and distributed in a spiral pattern. The sleeve is made of a lightweight material. An annular cavity is recessed around the inner wall of the sleeve facing the liquid outlet pipe, and a plurality of interconnected annular cavities facing different flow channels are opened on the outer wall of the sleeve. The blades have a flat section extending laterally and a curved section that is curved and inclined from the flat section toward the first nozzle. When the flue gas flow reaches a certain pressure, the sleeve is pushed to move upward by contacting the flat section of the blade until the annular cavity is connected to the secondary liquid outlet hole.

4. The high-efficiency desulfurization tower according to claim 3, characterized in that: The sliding sleeve is rotatably sleeved on the liquid outlet pipe, each of the flow channels is arc-shaped and spirally distributed, and a second nozzle is arranged on one end of each of the flow channels away from the liquid outlet pipe.

5. The high-efficiency desulfurization tower according to claim 4, characterized in that: Each of the curved arc sections intersects with a spraying direction of the lime slurry output from each of the second nozzles.

6. The high-efficiency desulfurization tower according to claim 5, characterized in that: A connecting block is provided on one end of the liquid outlet pipe close to the first nozzle, and a first bearing connected to the sliding sleeve is provided on the connecting block to enable the sliding sleeve to rotate relative to the liquid outlet pipe. A plurality of grooves are concavely provided on a side surface of the sliding sleeve facing the connecting block, and an elastic member is vertically arranged in each of the grooves, and two ends of the elastic member are respectively connected to the inner wall of the groove and the first bearing, and the elastic member and the sliding sleeve rotate synchronously relative to the first bearing.

7. The high-efficiency desulfurization tower according to claim 6, characterized in that: The swirl part includes a first connecting plate sealed and connected in the tower body cavity and a plurality of enhancers evenly distributed on the bottom surface of the first connecting plate, each of the enhancers passes through the first connecting plate in the vertical direction, and the enhancers are used to change the airflow direction when the smoke passes through.

8. The high-efficiency desulfurization tower according to claim 7, characterized in that: The amplifier comprises an outer tube connected to the first connecting plate and penetrating vertically, and several interference flow sheets arranged in the outer tube and distributed in a spiral shape.

9. The high-efficiency desulfurization tower according to claim 8, characterized in that: The enhancer also includes at least one middle tube and an inner tube which are coaxially arranged and spaced apart inside the outer tube in sequence to divide the outer tube into at least two annular spoiler cavities, each of which passes through the first connecting plate, and the spoilers are arranged in a plurality of groups corresponding to the spoiler cavities and are spirally arranged in each spoiler cavity.

10. The high-efficiency desulfurization tower according to claim 1, characterized in that: A second spray portion having the same structure as the first spray portion is arranged between the cyclone portion and the demister.

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