Multistage atomization semi-dry flue gas desulfurization reaction tower

Abstract

The utility model discloses a multistage atomization semi-dry method flue gas desulfurization reaction tower, belongs to the technical field of flue gas desulfurization, and adopts the technical scheme that the multistage atomization semi-dry method flue gas desulfurization reaction tower comprises a reaction tower, an atomization flow equalizing mechanism is arranged, a desulfurizing agent reaches a regulation and control valve along a guide pipe through a one-way agent conveying valve, and the regulation and control valve can flexibly regulate the conveying amount of the desulfurizing agent according to different working conditions; then the desulfurizer is accurately distributed into three round pipes arranged in the reaction tower in a layered mode, a primary atomization nozzle, a fine atomization nozzle and a superfine atomization nozzle corresponding to the bottoms of the three round pipes sequentially conduct layered fine atomization treatment on the desulfurizer, the primary atomization nozzle primarily disperses the desulfurizer, and the fine atomization nozzle further refines particles; the superfine atomizing nozzles form superfine fog drops, so that the contact area between the desulfurizing agent and the flue gas entering from the flue gas inlet pipe is greatly increased, the desulfurizing agent and the flue gas are in full contact, the desulfurizing efficiency is remarkably improved, and the content of sulfur dioxide in the desulfurized flue gas is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of flue gas desulfurization technology, and in particular to a multi-stage atomized semi-dry flue gas desulfurization reaction tower. Background Technology

[0002] With increasingly stringent environmental standards, flue gas desulfurization has become a crucial link in industrial waste gas treatment. Semi-dry flue gas desulfurization technology has been widely used in the industrial field due to its advantages such as high desulfurization efficiency, low investment and operating costs, and no wastewater discharge. As the core equipment of this technology, the performance of the semi-dry flue gas desulfurization reaction tower directly affects the desulfurization effect.

[0003] In current dry desulfurization reaction towers, the catalyst falls into the tower after the reaction, which is not very convenient for later recovery, reuse or treatment.

[0004] An existing patent (publication number: CN214437957U) discloses a desulfurization reaction for flue gas from an electric arc furnace. Compared with the traditional dry desulfurization reaction tower, this utility model has an internal catalyst that absorbs the sulfides in the flue gas and then falls into the interior of the tower body. This effectively prevents the floating mixture from flowing back into the pipe body when the exhaust stops, making it easier to collect and clean.

[0005] To address the aforementioned issues, existing patents offer solutions. However, existing flue gas desulfurization reaction towers suffer from numerous problems during actual operation. First, the atomization effect is poor. Many reaction towers employ a single-stage atomization method, resulting in insufficient contact between the desulfurizing agent and the flue gas. The atomized desulfurizing agent particles are relatively large, limiting the contact area with the flue gas and leading to incomplete reactions. Consequently, the sulfur dioxide content in the desulfurized flue gas remains high, making it difficult to meet increasingly stringent emission standards. Second, the gas-liquid mixing uniformity within the reaction tower is poor. Due to uneven airflow distribution within the tower, the desulfurizing agent and flue gas in some areas cannot mix effectively, resulting in incomplete local reactions and reducing overall desulfurization efficiency.

[0006] Therefore, a multi-stage atomization semi-dry flue gas desulfurization reaction tower is proposed. Utility Model Content

[0007] The purpose of this invention is to provide a multi-stage atomization semi-dry flue gas desulfurization reaction tower, which can solve many problems existing in the actual operation of current flue gas desulfurization reaction towers. First, the atomization effect is poor. Many reaction towers use a single-stage atomization method, which results in the desulfurizing agent not being able to fully contact the flue gas. The atomized desulfurizing agent particles are relatively large, and the contact area with the flue gas is limited, resulting in insufficient reaction. This makes it difficult to meet increasingly stringent emission standards, as the sulfur dioxide content in the desulfurized flue gas is still high. Second, the gas-liquid mixing uniformity in the reaction tower is poor. Due to the uneven airflow distribution in the tower, the desulfurizing agent and flue gas in some areas cannot be effectively mixed, resulting in incomplete local reaction and reducing the overall desulfurization efficiency.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage atomizing semi-dry flue gas desulfurization reaction tower, comprising a reaction tower, a flue gas inlet pipe connected to the left side of the reaction tower, an air inlet pipe connected to the right side of the reaction tower, an exhaust pipe connected to the top of the reaction tower, and an atomizing flow equalization mechanism provided on the top side inside the reaction tower.

[0009] The atomizing flow equalization mechanism includes a circular tube disposed on the top side inside the reaction tower. The bottom of the bottom circular tube is connected to a primary atomizing nozzle, the bottom of the middle circular tube is connected to a fine atomizing nozzle, and the bottom of the top circular tube is connected to an ultra-fine atomizing nozzle. A control valve is disposed on the right side of the reaction tower. The left side of the control valve penetrates the right side of the reaction tower and is connected to the right side of the circular tube. A conduit is connected to the right side of the control valve, and a one-way delivery valve is connected to the right side of the conduit. A spiral flow guiding structure is disposed at the bottom of the primary atomizing nozzle, the fine atomizing nozzle, and the ultra-fine atomizing nozzle.

[0010] Preferably, the spiral flow guiding structure includes a semi-circular sleeve rod fixedly connected to the middle of the inside of the reaction tower, and support rods are welded to both sides of the rear side inside the semi-circular sleeve rod.

[0011] Preferably, a support sleeve is welded to the front side of the support rod, and a vertical rod is fixedly connected to the top of the support sleeve. The vertical rod is located inside the circular tube.

[0012] Preferably, spiral guide plates are fixedly connected to the top, middle and bottom of the surface of the pole, and the spiral guide plates are respectively located at the bottom of the primary atomizing nozzle, the fine atomizing nozzle and the ultra-fine atomizing nozzle.

[0013] Preferably, a spray structure is provided on the bottom side inside the reaction tower. The spray structure includes a water guide ring disposed on the bottom side inside the reaction tower, and a spray head is connected to the bottom of the water guide ring.

[0014] Preferably, a double-ended water pipe is provided at the bottom right side of the reaction tower, with the left side of the double-ended water pipe penetrating through the right side of the reaction tower, the left side of the double-ended water pipe communicating with the right side of the water guide ring, and a water valve communicating with the right side of the double-ended water pipe.

[0015] Preferably, an airflow distribution plate is provided on the bottom side inside the reaction tower, the airflow distribution plate is located on the left side of the air inlet pipe, and the airflow distribution plate is located at the bottom right side of the flue gas inlet pipe.

[0016] Preferably, a demister is provided on the top side inside the reaction tower, and the demister is located at the top of the ultra-fine atomizing nozzle.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This application, by setting up an atomization and flow equalization mechanism, allows the desulfurizing agent to reach the control valve via a one-way delivery valve and a conduit. The control valve can flexibly adjust the delivery volume of the desulfurizing agent according to different operating conditions, and then accurately distribute it to three circular pipes arranged in layers inside the reaction tower. The bottom of the three circular pipes corresponds to the primary atomizing nozzle, fine atomizing nozzle, and ultra-fine atomizing nozzle, which sequentially perform layered and fine atomization treatment on the desulfurizing agent. The primary atomizing nozzle initially disperses the desulfurizing agent, the fine atomizing nozzle further refines the particles, and the ultra-fine atomizing nozzle forms ultra-fine droplets. This greatly increases the contact area between the desulfurizing agent and the flue gas entering from the flue gas inlet pipe, allowing the two to fully contact each other, significantly improving the desulfurization efficiency, effectively reducing the sulfur dioxide content in the flue gas after desulfurization, and meeting increasingly stringent emission standards.

[0019] 2. This application sets up a spiral guide structure to guide the atomized desulfurizing agent and flue gas to mix in a spiral manner. This not only prolongs the contact time between the two, but also improves the problem of uneven gas-liquid mixing in the reaction tower, avoids incomplete local reaction, optimizes the reaction environment in the reaction tower as a whole, and further ensures the stability of the desulfurization effect. Attached Figure Description

[0020] Figure 1 This is an overall structural diagram of the multi-stage atomization semi-dry flue gas desulfurization reaction tower of this utility model;

[0021] Figure 2 This is a structural diagram of the reaction tower of this utility model;

[0022] Figure 3 This is a structural diagram of the atomizing flow equalization mechanism of this utility model;

[0023] Figure 4 This is a structural diagram of the spiral flow guiding structure of this utility model;

[0024] Figure 5 This is a structural diagram of the spray structure of this utility model.

[0025] In the diagram, 1. Reaction tower; 2. Flue gas inlet pipe; 3. Air inlet pipe; 4. Exhaust pipe; 5. Atomizing flow equalization mechanism; 51. Circular pipe; 52. Primary atomizing nozzle; 53. Fine atomizing nozzle; 54. Ultra-fine atomizing nozzle; 55. Control valve; 56. Conduit; 57. One-way delivery valve; 58. Spiral guide structure; 581. Semi-circular sleeve; 582. Support rod; 583. Support sleeve; 584. Vertical pole; 585. Spiral guide plate; 6. Spray structure; 61. Water guide ring; 62. Spray head; 63. Double-ended water pipe; 64. Water valve; 7. Airflow distribution plate; 8. Demister. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-5 The present invention provides the following technical solution:

[0028] A multi-stage atomizing semi-dry flue gas desulfurization reaction tower includes a reaction tower 1, a flue gas inlet pipe 2 connected to the left side of the reaction tower 1, an air inlet pipe 3 connected to the right side of the reaction tower 1, an exhaust pipe 4 connected to the top of the reaction tower 1, and an atomizing flow equalization mechanism 5 provided on the top side inside the reaction tower 1.

[0029] The atomizing flow equalization mechanism 5 includes a circular tube 51 located on the top side inside the reaction tower 1. The bottom of the bottom circular tube 51 is connected to a primary atomizing nozzle 52, the bottom of the middle circular tube 51 is connected to a fine atomizing nozzle 53, and the bottom of the top circular tube 51 is connected to an ultra-fine atomizing nozzle 54. A control valve 55 is located on the right side of the reaction tower 1. The left side of the control valve 55 extends through the right side of the reaction tower 1, and the left side of the control valve 55 is connected to the right side of the circular tube 51. A conduit 56 is connected to the right side of the control valve 55, and a one-way delivery valve 57 is connected to the right side of the conduit 56. A spiral flow guiding structure 58 is located at the bottom of the primary atomizing nozzle 52, the fine atomizing nozzle 53, and the ultra-fine atomizing nozzle 54.

[0030] In this embodiment: By setting up an atomizing flow equalization mechanism 5, the desulfurizing agent enters the conduit 56 through a one-way delivery valve 57, and is then transported to the control valve 55. The control valve 55 precisely controls the delivery amount of the desulfurizing agent based on different operating conditions and distributes it to the three circular pipes 51 at the top of the reaction tower 1. The primary atomizing nozzle 52, fine atomizing nozzle 53, and ultra-fine atomizing nozzle 54 at the bottom of the circular pipes 51 sequentially perform layered fine atomization of the desulfurizing agent. The primary atomizing nozzle 52 first disperses the desulfurizing agent initially, then the fine atomizing nozzle 53 refines the particles, and the ultra-fine atomizing nozzle 54 converts the desulfurizing agent into ultra-fine droplets, greatly increasing the specific surface area of ​​the desulfurizing agent. The surface area allows for full contact between the desulfurizing agent droplets and the flue gas entering from the flue gas inlet pipe 2, significantly improving desulfurization efficiency. During this process, the spiral guide structure 58 located below the primary atomizing nozzle 52, fine atomizing nozzle 53, and ultra-fine atomizing nozzle 54 guides the desulfurizing agent droplets and flue gas to undergo spiral mixing. This not only greatly extends the contact time between the two but also makes the gas-liquid mixing in the tower more uniform, improving the gas-liquid mixing environment in the reaction tower 1, avoiding incomplete local reactions, and further improving and stabilizing the desulfurization effect. In addition, the air introduced from the air inlet pipe 3 also participates in the gas-liquid mixing process, providing the necessary oxygen for the desulfurization reaction and assisting in improving the desulfurization efficiency.

[0031] Specifically, such as Figure 4 As shown, the spiral flow guiding structure 58 includes a semi-circular sleeve rod 581 fixedly connected to the middle of the inside of the reaction tower 1, and support rods 582 are welded to both sides of the rear side inside the semi-circular sleeve rod 581.

[0032] Specifically, such as Figure 4 As shown, a support sleeve 583 is welded to the front side of the support rod 582, and a vertical rod 584 is fixedly connected to the top of the support sleeve 583. The vertical rod 584 is located inside the round tube 51.

[0033] Specifically, such as Figure 4 As shown, spiral guide plates 585 are fixedly connected to the top, middle and bottom of the surface of the upright 584. The spiral guide plates 585 are located at the bottom of the primary atomizing nozzle 52, the fine atomizing nozzle 53 and the ultra-fine atomizing nozzle 54, respectively.

[0034] In this embodiment: by setting a spiral guide structure 58, the semi-circular sleeve 581 is fixedly connected to the support sleeve 583 through the support rod 582, and the upright rod 584 on the support sleeve 583 provides support for the spiral guide plate 585. After the desulfurizing agent is atomized by the primary atomizing nozzle 52, the fine atomizing nozzle 53 and the ultra-fine atomizing nozzle 54, the corresponding spiral guide plate 585 below can guide the flue gas and the desulfurizing agent droplets to be mixed in a spiral manner. This spiral mixing method greatly prolongs the contact time between the desulfurizing agent droplets and the flue gas, allowing the two to react fully. At the same time, it makes the gas-liquid mixing in the reaction tower 1 more uniform, effectively avoiding the phenomenon of incomplete local reaction, and further improving and stabilizing the desulfurization effect.

[0035] Specifically, such as Figure 5 As shown, a spray structure 6 is provided on the bottom side inside the reaction tower 1. The spray structure 6 includes a water guide ring 61 provided on the bottom side inside the reaction tower 1, and a spray head 62 is connected to the bottom of the water guide ring 61.

[0036] Specifically, such as Figure 5 As shown, a double-ended water pipe 63 is installed at the bottom right side of the reaction tower 1. The left side of the double-ended water pipe 63 passes through the right side of the reaction tower 1. The left side of the double-ended water pipe 63 is connected to the right side of the water guide ring 61. A water valve 64 is connected to the right side of the double-ended water pipe 63.

[0037] In this embodiment: by setting up a spray structure 6, water enters the double-ended water pipe 63 through the water valve 64, then flows into the water guide ring 61, and finally sprays out from the spray head 62 at the bottom of the water guide ring 61. The spray head 62 is located on the bottom side inside the reaction tower 1. The sprayed water can clean the bottom of the reaction tower 1, reduce the temperature inside the tower, and also help treat some unreacted desulfurizing agent and impurities, which helps to improve the overall desulfurization efficiency and the service life of the equipment.

[0038] Specifically, such as Figure 2 As shown, an airflow distribution plate 7 is installed on the bottom side inside the reaction tower 1. The airflow distribution plate 7 is located on the left side of the air inlet pipe 3 and at the bottom right side of the flue gas inlet pipe 2.

[0039] Specifically, such as Figure 2 As shown, a demister 8 is installed on the top side inside the reaction tower 1, and the demister 8 is located on top of the ultra-fine atomizing nozzle 54.

[0040] In this embodiment: by setting up the airflow distribution plate 7 and the demister 8, the air entering from the air inlet pipe 3 is evenly distributed in the reaction tower 1, and fully contacts the flue gas entering through the flue gas inlet pipe 2, creating a good gas-liquid mixing environment for the desulfurization reaction, improving the reaction efficiency. In addition, the demister 8 is located at the top of the ultra-fine atomizing nozzle 54, which can remove the mist droplets carried in the purified flue gas, prevent them from damaging the downstream equipment, and ensure that the emitted flue gas meets environmental protection requirements.

[0041] Working Principle: In the operation of the multi-stage atomization semi-dry flue gas desulfurization reaction tower 1, sulfur-containing flue gas first enters the reaction tower 1 through the flue gas inlet pipe 2. Simultaneously, air enters through the air inlet pipe 3 and flows through the airflow distribution plate 7, causing the incoming air to be split. The split air and sulfur-containing flue gas are evenly distributed within the tower, creating a favorable gas-liquid mixing environment for the desulfurization reaction. Next, the desulfurizing agent enters the conduit 56 through the one-way delivery valve 57 and is delivered to the control valve 55. The control valve 55 precisely regulates the delivery volume according to different operating conditions, distributing the desulfurizing agent to the three circular pipes 51 at the top of the reaction tower 1. The primary atomizing nozzle 52, fine atomizing nozzle 53, and ultra-fine atomizing nozzle 54 at the bottom of the circular pipes 51 sequentially perform stratified fine atomization of the desulfurizing agent, greatly expanding the contact area between the desulfurizing agent and the flue gas, and significantly improving the desulfurization efficiency. The spiral guide plate 585 below the primary atomizing nozzle 52, fine atomizing nozzle 53, and ultra-fine atomizing nozzle 54 guides the desulfurizing agent droplets and flue gas to mix in a spiral manner, prolonging the contact time, making the gas-liquid mixing more uniform, avoiding incomplete local reactions, and further improving and stabilizing the desulfurization effect. The air introduced from the air inlet pipe 3 participates in the gas-liquid mixing, providing the necessary oxygen for the desulfurization reaction. At the same time, the water from the spray structure 6 is sprayed out from the spray head 62 through the water valve 64, the double-headed water pipe 63, and the water guide ring 61 to clean the bottom of the reaction tower 1, reduce the temperature inside the tower, and assist in the treatment of unreacted desulfurizing agent and impurities, thereby improving the overall desulfurization efficiency and equipment service life. Finally, the demister 8 removes the droplets carried in the purified flue gas to prevent them from damaging subsequent equipment and ensure that the emitted flue gas meets environmental protection requirements. The treated flue gas is discharged from the exhaust pipe 4.

[0042] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-stage atomizing semi-dry flue gas desulfurization reaction tower, comprising a reaction tower (1), characterized in that: The left side of the reaction tower (1) is connected to a flue gas inlet pipe (2), the right side of the reaction tower (1) is connected to an air inlet pipe (3), the top of the reaction tower (1) is connected to an exhaust pipe (4), and an atomizing flow equalization mechanism (5) is provided on the top side inside the reaction tower (1). The atomizing flow equalization mechanism (5) includes a circular tube (51) disposed on the top side inside the reaction tower (1). The bottom of the bottom circular tube (51) is connected to a primary atomizing nozzle (52), the bottom of the middle circular tube (51) is connected to a fine atomizing nozzle (53), and the bottom of the top circular tube (51) is connected to an ultrafine atomizing nozzle (54). A control valve (55) is disposed on the right side of the reaction tower (1). The left side of the control valve (55) penetrates the right side of the reaction tower (1). The left side of the control valve (55) is connected to the right side of the circular tube (51). A conduit (56) is connected to the right side of the control valve (55). A one-way delivery valve (57) is connected to the right side of the conduit (56). A spiral flow guiding structure (58) is disposed at the bottom of the primary atomizing nozzle (52), the fine atomizing nozzle (53), and the ultrafine atomizing nozzle (54).

2. The multi-stage atomizing semi-dry flue gas desulfurization reaction tower according to claim 1, characterized in that: The spiral flow guiding structure (58) includes a semi-circular sleeve rod (581) fixedly connected to the middle of the inside of the reaction tower (1), and support rods (582) are welded to both sides of the rear side inside the semi-circular sleeve rod (581).

3. The multi-stage atomizing semi-dry flue gas desulfurization reaction tower according to claim 2, characterized in that: A support sleeve (583) is welded to the front side of the support rod (582), and a vertical rod (584) is fixedly connected to the top of the support sleeve (583). The vertical rod (584) is located inside the round tube (51).

4. The multi-stage atomizing semi-dry flue gas desulfurization reaction tower according to claim 3, characterized in that: Spiral guide plates (585) are fixedly connected to the top, middle and bottom of the surface of the upright (584). The spiral guide plates (585) are located at the bottom of the primary atomizing nozzle (52), the fine atomizing nozzle (53) and the ultra-fine atomizing nozzle (54), respectively.

5. The multi-stage atomizing semi-dry flue gas desulfurization reaction tower according to claim 1, characterized in that: A spray structure (6) is provided on the bottom side inside the reaction tower (1). The spray structure (6) includes a water guide ring (61) provided on the bottom side inside the reaction tower (1). The bottom of the water guide ring (61) is connected to a spray head (62).

6. The multi-stage atomizing semi-dry flue gas desulfurization reaction tower according to claim 5, characterized in that: A double-ended water pipe (63) is provided at the bottom right side of the reaction tower (1). The left side of the double-ended water pipe (63) passes through the right side of the reaction tower (1). The left side of the double-ended water pipe (63) is connected to the right side of the water guide ring (61). A water valve (64) is connected to the right side of the double-ended water pipe (63).

7. The multi-stage atomizing semi-dry flue gas desulfurization reaction tower according to claim 1, characterized in that: An airflow distribution plate (7) is provided on the bottom side inside the reaction tower (1). The airflow distribution plate (7) is located on the left side of the air inlet pipe (3) and on the bottom right side of the flue gas inlet pipe (2).

8. The multi-stage atomizing semi-dry flue gas desulfurization reaction tower according to claim 1, characterized in that: A demister (8) is provided on the top side inside the reaction tower (1), and the demister (8) is located on top of the ultra-fine atomizing nozzle (54).

Images