A reaction device for high-concentration SO2 flue gas

Abstract

The utility model discloses a kind of reaction devices of high concentration SO2 flue gas, it is related to SO2 flue gas reaction technical field, including reaction tank, the bottom end of reaction tank is fixedly connected with multiple support legs, and the top of reaction tank is connected with cover plate by hexagon bolt, the top of cover plate is fixedly connected with gas-liquid separation tower, the outer wall of gas-liquid separation tower is fixedly connected with reverse spray mixing reaction tube;Circulation anti-blocking mechanism, circulation anti-blocking mechanism is set between reaction tank and gas-liquid separation tower, and circulation anti-blocking mechanism is used for the anti-blocking treatment of absorption liquid circulation flow;Gas oxidation mechanism, gas oxidation mechanism is set on reaction tank, and gas oxidation mechanism is used for the treatment of scale-forming reaction product.The utility model passes through gas oxidation mechanism and imports oxidizing air into reaction tank, oxidizes the CaSO3 of easy scale-forming into more stable gypsum, not easy to adhere in pipeline inner wall, can be discharged system along with slurry smoothly, to avoid causing pipeline blockage.

Description

Technical Field

[0001] This utility model belongs to the field of SO2 flue gas reaction technology, and in particular relates to a reaction device for high-concentration SO2 flue gas. Background Technology

[0002] In the non-ferrous metal smelting process, some high-temperature furnaces produce flue gas containing sulfur dioxide, with a concentration of 0-7% (of which a concentration greater than 3% is considered high). Direct emission of this concentration of sulfur dioxide gas will directly cause air pollution, which will then turn into local acid rain and cause soil pollution. Therefore, before emission, it is necessary to use an absorbent liquid (usually an alkaline solution, such as limestone slurry, ammonia water, alkaline solution, etc.) to react chemically with SO2, thereby converting the gaseous SO2 into liquid or solid salts and separating them from the flue gas for harmless or resource-based treatment.

[0003] For example, CN221432571U discloses a sulfur dioxide flue gas absorption tower with a trough separation absorption structure, relating to the field of sulfur dioxide flue gas absorption tower technology. Its key technical features include a gas-liquid separation tower, a reverse nozzle installed on the gas-liquid separation tower, and a circulation tank connected to the gas-liquid separation tower. It also includes a circulation spraying mechanism located between the reverse nozzle and the circulation tank, used to circulate the absorbent in the circulation tank to the interior of the reverse nozzle for spraying; and a power-enhancing mechanism installed on the circulation spraying mechanism to increase the conveying power of the sulfur dioxide flue gas. This technical solution increases the sufficiency of contact with the flue gas by incorporating a circulation spraying mechanism that allows for the recycling of insufficiently absorbed absorbent, ensuring a more complete reaction. Furthermore, the power-enhancing mechanism further increases the secondary power of the flue gas, resulting in a more complete reaction and a high-efficiency power transmission speed.

[0004] The above-mentioned patent has the following defects in use:

[0005] The absorbent, such as limestone slurry, is transported and mixed with sulfur dioxide flue gas in a reverse nozzle to react. After the absorption reaction is completed, the flue gas, carrying a large number of droplets, enters the lower gas-liquid separation tower. Here, the droplets (rich in CaSO3 slurry) in the flue gas are separated through gravity settling and baffle collision. The clean flue gas is finally discharged through the exhaust port at the top, while the separated CaSO3-rich slurry flows back into the circulation tank through the liquid delivery pipe. The corresponding reaction products also fall into the circulation tank. CaSO3 is prone to scaling, especially under high concentration SO2 flue gas reaction, where the reaction produces more, making it easy for CaSO3 to reach saturation and precipitate, forming solid particles. The precipitated CaSO3 crystals are usually small, irregular in shape, and viscous, forming a soft scale that can easily block the circulation of the absorbent in the delivery pipe. Therefore, this invention proposes a reaction device for high concentration SO2 flue gas. Utility Model Content

[0006] This invention provides a reaction device for high-concentration SO2 flue gas. A circulating anti-clogging mechanism drives a circulating pump to draw limestone slurry into a reverse-jet mixing reaction tube via connecting pipes, liquid guide pipes, and delivery pipes. This slurry reacts with the SO2 flue gas, absorbing the SO2 and preventing air pollution. After the reaction, the CaSO3-rich slurry flows back to the reaction tank through a gas-liquid separation tower for circulation and utilization. A filter screen filters out CaSO3 crystals and oxidized gypsum during the limestone slurry's flow, while an L-shaped cleaning brush repeatedly cleans the screen, reducing the adhesion of CaSO3 crystals and oxidized gypsum and preventing them from entering the connecting pipes, liquid guide pipes, and delivery pipes, thus avoiding blockage of the limestone slurry's circulation. An oxidizing air supply mechanism introduces oxidizing air into the reaction tank, oxidizing the easily scaling CaSO3 into more stable gypsum, which is less likely to adhere to the inner wall of the pipes and can be smoothly discharged from the system with the slurry, thus preventing pipe blockage. In summary, this invention solves the problems in the prior art.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0008] This utility model discloses a reaction device for high-concentration SO2 flue gas, comprising:

[0009] The reaction vessel has multiple support legs fixedly connected to its bottom end, and a cover plate is connected to its top end by hexagonal bolts. A gas-liquid separation tower is fixedly connected to the top end of the cover plate, and a reverse-jet mixing reaction pipe is fixedly connected to the outer wall of the gas-liquid separation tower.

[0010] A circulation anti-clogging mechanism is provided between the reaction tank and the gas-liquid separation tower, and the circulation anti-clogging mechanism is used to prevent clogging of the circulating flow of the absorbent liquid.

[0011] An air-feeding oxidation mechanism is installed on the reaction tank and is used to treat the scaling reaction products.

[0012] The circulating anti-clogging mechanism includes a delivery pipe fixedly connected to the outer wall of the backflow mixing reaction pipe. A circulation pump is provided at the bottom of the delivery pipe, and the bottom end of the delivery pipe is connected to the discharge end of the circulation pump via a flange and hexagonal bolts. A liquid guide pipe is fixedly connected to the extraction end of the circulation pump, and a pair of connecting pipes are provided on one side of the liquid guide pipe. The connecting pipe on one side is connected to the reaction tank via a flange and hexagonal bolts, and the connecting pipe on the other side is connected to the liquid guide pipe via a flange and hexagonal bolts. A filter screen is fixedly connected to the inner wall of the connecting pipe on one side. A pair of L-shaped cleaning brushes are provided inside the reaction tank, and the L-shaped cleaning brush on one side is in contact with the surface of the filter screen.

[0013] Furthermore, a servo motor is fixedly connected to the top of the reaction vessel, and a rotating rod is fixedly connected to the output end of the servo motor. The rotating rod is rotatably connected to the reaction vessel through a bearing, and multiple pairs of stirring blades are fixedly connected to the outer wall of the rotating rod. The opposite sides of a pair of stirring blades at the bottom are fixedly connected to the opposite sides of a pair of L-shaped cleaning brushes.

[0014] Furthermore, a tubular heat exchanger is fixedly connected between the pair of connecting pipes, and a fixing plate is fixedly connected between the top of the tubular heat exchanger and the bottom of the circulating pump body.

[0015] Furthermore, the gas-feeding oxidation mechanism includes an oxidation blower, a connecting plate is fixedly connected between the bottom end of the oxidation blower and one of the support legs, an annular pipe is fixedly connected to the inner bottom end of the reaction tank, and multiple aeration nozzles are fixedly connected to the top end of the annular pipe, an air supply pipe is fixedly connected to the air supply end of the oxidation blower, and one end of the air supply pipe penetrates the outer wall of the reaction tank and is connected to the annular pipe.

[0016] Furthermore, a plurality of breaking teeth are fixedly connected to the bottom end of the pair of stirring blades located at the bottom, and the breaking teeth are located at the top of the aeration nozzle.

[0017] Furthermore, multiple heat dissipation strips are fixedly connected to the outer wall of the reaction vessel.

[0018] Furthermore, the top of the cover plate has an opening for adding ingredients, and a sealing plug is fitted on the top of the opening for adding ingredients, with the outer wall of the sealing plug in contact with the inner wall of the opening for adding ingredients.

[0019] The present invention has the following advantages over the prior art:

[0020] 1. This technical solution, through its designed circulation anti-clogging mechanism, enables the circulation pump to work with the connecting pipe, liquid guide pipe, and delivery pipe to draw limestone slurry into the reverse-jet mixing reaction pipe. There, the slurry reacts with SO2 flue gas, absorbing the SO2 and preventing air pollution. After the reaction, the CaSO3-rich slurry flows back to the reaction tank through the gas-liquid separation tower, allowing for circulation and utilization. A filter screen blocks CaSO3 crystals during the limestone slurry's flow, and an L-shaped cleaning brush repeatedly cleans the screen, reducing CaSO3 crystal adhesion and preventing them from entering the connecting pipe, liquid guide pipe, and delivery pipe, thus avoiding blockage of the limestone slurry's circulation.

[0021] 2. This technical solution uses an air-feeding oxidation mechanism to introduce oxidizing air into the reaction tank through an oxidation blower, air supply pipe, and ring pipe. This oxidizes the easily scale-forming CaSO3 into more stable gypsum, which is less likely to adhere to the inner wall of the pipe and can be smoothly discharged from the system with the slurry, thus avoiding pipe blockage.

[0022] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a three-dimensional structural diagram of a reaction device for high-concentration SO2 flue gas according to the present invention;

[0025] Figure 2 This is a partial three-dimensional structural diagram of a reaction device for high-concentration SO2 flue gas according to the present invention;

[0026] Figure 3 This is a partial cross-sectional structural diagram of a reaction device for high-concentration SO2 flue gas according to the present invention;

[0027] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A;

[0028] Figure 5 This is a bottom-view three-dimensional structural diagram of the stirring blades, L-shaped cleaning brush body, and crushing teeth in this utility model.

[0029] The attached diagram lists the components represented by each number as follows:

[0030] 1. Reaction vessel; 2. Support leg; 3. Cover plate; 4. Gas-liquid separation tower; 5. Backspray mixing reaction pipe; 6. Circulation anti-clogging mechanism; 601. Conveying pipe body; 602. Circulation pump body; 603. Liquid guide pipe; 604. Connecting pipe; 605. Fixing plate; 606. Servo motor; 607. Rotating rod; 608. Stirring blade; 609. Filter screen; 6010. L-shaped cleaning brush body; 7. Tubular heat exchanger; 8. Gas supply oxidation mechanism; 801. Oxidation blower; 802. Connecting plate; 803. Gas supply pipe; 804. Annular pipe; 805. Aeration nozzle; 806. Crushing teeth; 9. Heat dissipation strip; 10. Addition port; 11. Sealing plug. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0032] In the description of this utility model, it should be understood that the terms "relative", "one end", "inner", "lateral", "end", "both ends", "both sides", "front", "one end face", "the other end face", etc., which indicate orientation or positional relationship, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Specific Implementation Example 1:

[0034] Please see Figures 1-5 As shown, the present invention provides a reaction device for high-concentration SO2 flue gas, comprising:

[0035] The reaction vessel 1 has multiple support legs 2 fixedly connected to its bottom end, and a cover plate 3 is connected to the top end of the reaction vessel 1 by hexagonal bolts. A gas-liquid separation tower 4 is fixedly connected to the top end of the cover plate 3, and a reverse spray mixing reaction pipe 5 is fixedly connected to the outer wall of the gas-liquid separation tower 4.

[0036] The circulation anti-blocking mechanism 6 is located between the reaction tank 1 and the gas-liquid separation tower 4, and is used to prevent blockage of the circulating flow of the absorbent liquid.

[0037] Gas-feeding oxidation mechanism 8 is installed on reaction tank 1 and is used to treat scaling reaction products.

[0038] The circulation anti-clogging mechanism 6 includes a delivery pipe 601 fixedly connected to the outer wall of the backflow mixing reaction pipe 5. A circulation pump 602 is provided at the bottom of the delivery pipe 601, and the bottom end of the delivery pipe 601 is connected to the discharge end of the circulation pump 602 by a flange and hexagonal bolts. A liquid guide pipe 603 is fixedly connected to the extraction end of the circulation pump 602, and a pair of connecting pipes 604 are provided on one side of the liquid guide pipe 603. The connecting pipe 604 on one side is connected to the reaction tank 1 by a flange and hexagonal bolts, and the connecting pipe 604 on the other side is connected to the liquid guide pipe 603 by a flange and hexagonal bolts. A filter screen 609 is fixedly connected to the inner wall of the connecting pipe 604 on one side. A pair of L-shaped cleaning brushes 6010 are provided inside the reaction tank 1, and the L-shaped cleaning brushes 6010 on one side are in contact with the surface of the filter screen 609.

[0039] In the specific implementation process, the driving circulation pump 602 draws the absorbent liquid (limestone slurry) from the reaction tank 1 through the connecting pipe 604, and then transports it through the liquid guide pipe 603 and the conveying pipe 601 to the reverse-jet mixing reaction pipe 5. At the same time, the external flue gas conveying equipment transports high-concentration SO2 flue gas to the reverse-jet mixing reaction pipe 5. The two react with each other. First, sulfur dioxide dissolves in water, i.e., SO2(g) + H2O → H2SO3 (sulfurous acid). Then, sulfurous acid reacts with limestone, and the reaction formula is: H2SO3 + CaCO3 → CaSO3 + CO2(g) + H2O. The reaction product is calcium sulfite. After the absorption reaction is completed, the flue gas, carrying the CaSO3-rich slurry, enters the lower gas-liquid separation tower 4. The CaSO3-rich slurry in the flue gas is separated through gravity settling and baffle collision. The clean flue gas is finally discharged through the exhaust port at the top, while the separated CaSO3-rich slurry flows back into the reaction tank 1 and is forcibly oxidized by the gas-feeding oxidation mechanism 8. The reaction formula is CaSO3 + ½O2 → CaSO4 (calcium sulfate). The calcium sulfate crystals produced are CaSO4 + 2H2O → CaSO4·2H2O(s), which is gypsum. The limestone slurry continues to flow and is filtered and blocked by the CaSO3 crystals and oxidized gypsum through the filter screen (609). At the same time, the L-shaped cleaning brush body 6010 repeatedly cleans the filter screen 609 to reduce the CaSO3 crystals. The design avoids the adhesion of oxidized gypsum, preventing it from entering the connecting pipe 604, the liquid guiding pipe 603, and the conveying pipe 601, thus preventing blockage of the circulating flow of limestone slurry. Furthermore, many components in this design require the use of appropriate corrosion-resistant materials to ensure their service life. For example, the reaction tank 1 is made of carbon steel with a PP / FRP lining to resist SO2 and sulfuric acid corrosion; the cover plate 3 is made of 316L stainless steel; the gas-liquid separation tower 4 is made of 2205 duplex stainless steel to resist gas-liquid erosion corrosion; the reverse-jet mixing reaction pipe 5 is made of Hastelloy C276 to resist the impact of high-concentration SO2 and 60℃ acidic slurry; the conveying pipe 601, the liquid guiding pipe 603, and the connecting pipe 604 are all made of ceramic-lined steel pipes; and the circulating pump body 602 is fully lined with fluoroplastics. The impeller of the unit is made of 2605 duplex steel lined with tungsten carbide coating; the filter screen 609 is made of 316L sintered metal filter element; the L-shaped cleaning brush body 6010 is made of nylon 66 + 30% glass fiber reinforcement, which is acid and alkali resistant and does not damage the surface of the filter screen 609; the rotating rod 607 is made of 4340 alloy steel + Hastelloy C276 coating; the stirring blades 608 are made of 2205 duplex steel with tungsten carbide overlay on the edges; the tubular heat exchanger 7 is made of titanium tubes (Gr1) / shell side carbon steel, which is resistant to slurry corrosion; the oxidation blower 801 is made of cast iron + epoxy coating; the gas transmission pipe 803 is made of fiberglass; the annular pipe 804 is made of titanium alloy Gr2; the aeration nozzle 805 is made of reaction sintered silicon carbide; the crushing teeth 806 are made of tungsten carbide hard alloy; and the sealing plug 11 is made of fluororubber.The flange uses a 316L+PTFE gasket, the bolts are B8M grade, resistant to stress corrosion cracking, and the bearings are ceramic rolling element bearings.

[0040] The top of the reaction vessel 1 is fixedly connected to a servo motor 606, and the output end of the servo motor 606 is fixedly connected to a rotating rod 607. The rotating rod 607 is rotatably connected to the reaction vessel 1 through a bearing, and multiple pairs of stirring blades 608 are fixedly connected to the outer wall of the rotating rod 607. The opposite sides of a pair of stirring blades 608 at the bottom are fixedly connected to the opposite sides of a pair of L-shaped cleaning brushes 6010.

[0041] The servo motor 606 drives multiple pairs of stirring blades 608 to rotate via the rotating rod 607, stirring CaSO3 and oxygen to fully mix and react. At the same time, during the rotation, a pair of L-shaped cleaning brushes 6010 drive the filter screen 609 to brush back and forth, reducing the adhesion of CaSO3 crystals and oxidized gypsum, and making it less likely to clog the filter screen 609.

[0042] A tubular heat exchanger 7 is fixedly connected between a pair of connecting pipes 604, and a fixing plate 605 is fixedly connected between the top of the tubular heat exchanger 7 and the bottom of the circulating pump body 602.

[0043] The tubular heat exchanger 7 is installed in the circulation pipeline of the connecting pipe 604, the liquid guiding pipe 603 and the conveying pipe body 601. It exchanges heat with the high-temperature limestone slurry through the cooling medium (such as cooling water) to control the liquid temperature within a suitable range, maintain the stability of the reaction temperature, and prevent the reaction from overheating, which would lead to a decrease in efficiency or damage to the equipment. The tubular heat exchanger 7 is common knowledge in the prior art, so it will not be described in detail here. Specific Implementation Example 2:

[0045] Please see Figures 1-5 As shown, in a preferred embodiment, the gas-feeding oxidation mechanism 8 includes an oxidation blower 801. A connecting plate 802 is fixedly connected between the bottom end of the oxidation blower 801 and one of the support legs 2. An annular pipe 804 is fixedly connected to the inner bottom end of the reaction tank 1, and a plurality of aeration nozzles 805 are fixedly connected to the top end of the annular pipe 804. An air supply pipe 803 is fixedly connected to the air supply end of the oxidation blower 801, and one end of the air supply pipe 803 penetrates the outer wall of the reaction tank 1 and is connected to the annular pipe 804.

[0046] In the specific implementation process, the oxidation blower 801 is a special blower used to forcibly deliver air or oxygen-enriched gas into liquids (usually slurry or wastewater) to promote the oxidation reaction of specific substances therein. In this embodiment, the HPSR200 double-lobe Roots blower is selected. The oxidation blower 801 delivers oxidizing air into the annular pipe 804 through the air supply pipe 803, and then sprays it out through multiple aeration nozzles 805 to introduce oxidizing air into the reaction tank 1. The easily scaled CaSO3 is oxidized into more stable gypsum, which is not easy to adhere to the inner wall of the pipe and can be smoothly discharged from the system with the slurry, thereby avoiding pipe blockage. Moreover, the gypsum produced by desulfurization (called FGD gypsum) has high purity and is a high-quality building material raw material. It can be widely used in the production of gypsum board, cement retarder, soil conditioner, etc., realizing the transformation of waste into treasure and creating economic value.

[0047] Among them, a pair of stirring blades 608 at the bottom are fixedly connected to a number of breaking teeth 806, and the breaking teeth 806 are located at the top of the aeration nozzle 805.

[0048] Multiple breaking teeth 806 can break up the ejected bubbles, enhancing mixing and oxygenation efficiency.

[0049] The outer wall of the reaction vessel 1 is fixedly connected with multiple heat dissipation strips 9.

[0050] The heat dissipation strip 9 enables the heat on the reaction vessel 1 to be dissipated quickly to reduce the temperature of the limestone slurry.

[0051] The top of the cover plate 3 has an addition port 10, and a sealing plug 11 is fitted on the top of the addition port 10. The outer wall of the sealing plug 11 is in contact with the inner wall of the addition port 10.

[0052] By adding port 10, when the limestone slurry is insufficient, limestone slurry is added to the reaction tank 1 through the adding port 10 to replenish it. After the addition is completed, the sealing plug 11 is closed to seal the tank.

[0053] The circuits, electronic components, and chip modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0054] All standard parts used in the application documents can be purchased from the market. All components in this application document can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The electrical components mentioned in this document are all electrically connected to the external main controller and power supply, and the main controller is a conventional known device that can play a control role.

[0055] The working principle of this utility model is as follows:

[0056] In use, the circulating pump 602 draws the absorbent liquid (limestone slurry) from the reaction tank 1 through the connecting pipe 604, and then transports it through the liquid guide pipe 603 and the conveying pipe 601 to the reverse-jet mixing reaction pipe 5. Simultaneously, an external flue gas conveying device delivers high-concentration SO2 flue gas to the reverse-jet mixing reaction pipe 5. The two react and mix, producing calcium sulfite as the reaction product. After the absorption reaction, the flue gas, carrying the CaSO3-rich slurry, enters the lower gas-liquid separation tower 4. Through gravity settling and baffle collision, the CaSO3-rich slurry is separated from the flue gas. The clean flue gas is finally discharged through the top exhaust port, while the separated CaSO3-rich slurry flows back into the reaction tank 1 and drives the oxidation blower 801 through the gas delivery pipe 803. Oxidizing air is supplied into the annular pipe 804 and then sprayed out by multiple aeration nozzles 805 into the reaction tank 1. The servo motor 606 drives multiple pairs of stirring blades 608 to rotate via the rotating rod 607, stirring CaSO3 and oxygen to fully mix and react, oxidizing the easily scale-forming CaSO3 into more stable gypsum. The limestone slurry continues to flow and is filtered and blocked by the filter screen (609) to prevent it from entering the connecting pipe 604, the liquid guide pipe 603 and the conveying pipe 601. At the same time, during the rotation, a pair of L-shaped cleaning brushes 6010 are driven to brush the surface of the filter screen 609 back and forth, reducing the adhesion of CaSO3 crystals and oxidized gypsum, thereby avoiding blockage of the circulating flow of limestone slurry.

[0057] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A reaction device for high-concentration SO2 flue gas, characterized in that, include: The reaction vessel (1) has multiple support legs (2) fixedly connected to its bottom end, and a cover plate (3) is connected to the top end of the reaction vessel (1) by hexagonal bolts. A gas-liquid separation tower (4) is fixedly connected to the top end of the cover plate (3), and a reverse spray mixing reaction pipe (5) is fixedly connected to the outer wall of the gas-liquid separation tower (4). The circulation anti-blocking mechanism (6) is located between the reaction tank (1) and the gas-liquid separation tower (4), and the circulation anti-blocking mechanism (6) is used for anti-blocking treatment of the circulating flow of the absorbent liquid; Gas-feeding oxidation mechanism (8) is provided on the reaction tank (1) and is used for the treatment of scaling reaction products; The circulating anti-clogging mechanism (6) includes a conveying pipe (601) fixedly connected to the outer wall of the reverse spray mixing reaction pipe (5). A circulating pump (602) is provided at the bottom of the conveying pipe (601), and the bottom end of the conveying pipe (601) is connected to the discharge end of the circulating pump (602) via a flange and hexagonal bolts. A liquid guide pipe (603) is fixedly connected to the extraction end of the circulating pump (602), and a pair of connecting pipes (604) are provided on one side of the liquid guide pipe (603). The connecting pipe (604) on one side is connected to the reaction vessel (1) by a flange and hex bolts, and the connecting pipe (604) on the other side is connected to the liquid guide pipe (603) by a flange and hex bolts. A filter screen (609) is fixedly connected to the inner wall of the connecting pipe (604) on one side. A pair of L-shaped cleaning brushes (6010) are provided inside the reaction vessel (1), and the L-shaped cleaning brushes (6010) on one side are in contact with the surface of the filter screen (609).

2. The reaction device for high-concentration SO2 flue gas according to claim 1, characterized in that, A servo motor (606) is fixedly connected to the top of the reaction vessel (1), and a rotating rod (607) is fixedly connected to the output end of the servo motor (606). The rotating rod (607) is rotatably connected to the reaction vessel (1) through a bearing, and multiple pairs of stirring blades (608) are fixedly connected to the outer wall of the rotating rod (607). The opposite sides of a pair of stirring blades (608) at the bottom are fixedly connected to the opposite sides of a pair of L-shaped cleaning brushes (6010).

3. The reaction device for high-concentration SO2 flue gas according to claim 1, characterized in that, A tubular heat exchanger (7) is fixedly connected between a pair of the connecting pipes (604), and a fixing plate (605) is fixedly connected between the top of the tubular heat exchanger (7) and the bottom of the circulating pump body (602).

4. The reaction device for high-concentration SO2 flue gas according to claim 1, characterized in that, The gas-feeding oxidation mechanism (8) includes an oxidation blower (801), a connecting plate (802) is fixedly connected between the bottom end of the oxidation blower (801) and one of the support legs (2), an annular pipe (804) is fixedly connected to the inner bottom end of the reaction tank (1), and multiple aeration nozzles (805) are fixedly connected to the top end of the annular pipe (804). A gas supply pipe (803) is fixedly connected to the gas supply end of the oxidation blower (801), and one end of the gas supply pipe (803) penetrates the outer wall of the reaction tank (1) and is connected to the annular pipe (804).

5. The reaction device for high-concentration SO2 flue gas according to claim 2, characterized in that, A pair of stirring blades (608) located at the bottom are fixedly connected to a plurality of breaking teeth (806) at their bottom ends, and the breaking teeth (806) are located at the top of the aeration nozzle (805).

6. The reaction device for high-concentration SO2 flue gas according to claim 1, characterized in that, The outer wall of the reaction vessel (1) is fixedly connected with multiple heat dissipation strips (9).

7. The reaction device for high-concentration SO2 flue gas according to claim 1, characterized in that, The top of the cover plate (3) has an addition port (10) and a sealing plug (11) is fitted on the top of the addition port (10). The outer wall of the sealing plug (11) is in contact with the inner wall of the addition port (10).

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