Flue gas desulfurization spray tower

Abstract

The utility model relates to atmospheric pollution control technical field discloses flue gas desulfurization spray tower, including frame, the outer wall intercommunication of frame has the smoke inlet, the outer wall bottom of frame is fixedly connected with base, the outer wall top of base is provided with stirring mechanism, the inner wall of frame is provided with flow guide mechanism, the inner wall of frame is provided with a plurality of spray mechanism, the stirring mechanism includes flow guide groove, the outer wall bottom of flow guide groove is fixedly connected in the outer wall top of base, the inner wall of base is provided with recess, the outer wall top of flow guide groove is provided with stirring subassembly, in the utility model, the flow guide groove is equipped with in the slurry pool bottom and makes the slurry gather in first stirring paddle, and first stirring paddle cooperates second stirring paddle and stirs the slurry in different directions, and the stirring effect is enhanced, for further preventing the deposition, through the drainage pipe and centrifugal nozzle extraction slurry to the deposition slurry place carries out the injection, avoids the slurry concentration difference too big.

Description

Technical Field

[0001] This utility model relates to the field of air pollution control technology, and in particular to a flue gas desulfurization spray tower. Background Technology

[0002] Flue gas is a mixture of gases produced during fuel combustion and industrial production, containing sulfur dioxide, nitrogen oxides, and particulate pollutants. Sulfur dioxide is a major contributor to acid rain and requires purification. Desulfurization spray towers are desulfurization devices that atomize a slurry made of desulfurizing agent through a spray layer inside the tower, allowing it to fully contact the flue gas flowing counter-currently. The sulfur dioxide reacts with the slurry to produce harmless calcium sulfate, thus achieving desulfurization. With its simple structure and high efficiency, it is widely used in flue gas purification in the thermal power and steel industries.

[0003] Traditional flue gas desulfurization spray towers consist of a tower body and an inlet flue structure. The core function is to achieve desulfurization by atomizing the desulfurization slurry through a spray layer and reacting it with the counter-current flue gas. The purified flue gas is discharged from the top of the tower after the demister removes the liquid droplets it carries. However, the simple design of the connection structure between the tower body and the inlet flue is still a problem. This causes the flue gas to deflect when it enters the tower, resulting in excessively high flue gas velocity in some areas, which shortens the reaction time and affects the overall purification effect.

[0004] Compared to traditional flue gas desulfurization spray towers, modern ones maintain the same core working principle, but have improved the spray layer by increasing the number of spray layers and optimizing the type and arrangement of nozzles to reduce atomization overlap and improve the uniformity of contact between flue gas and slurry. The demister has also been upgraded from the traditional flat plate and folded plate type to a high-efficiency structure, reducing slurry loss and corrosion risks to downstream equipment. However, the problem of local sedimentation still exists when the slurry concentration in the slurry pool fluctuates greatly. Therefore, flue gas desulfurization spray towers are proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a flue gas desulfurization spray tower, which aims to improve the problem of local sedimentation that occurs when the slurry concentration in the slurry tank fluctuates greatly in the existing technology.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a flue gas desulfurization spray tower, including a frame, an inlet connected to the outer wall of the frame, a base fixedly connected to the bottom of the outer wall of the frame, a stirring mechanism provided at the top of the outer wall of the base, a flow guiding mechanism provided on the inner wall of the frame, and multiple spraying mechanisms provided on the inner wall of the frame. The stirring mechanism includes a guide channel, the bottom of the outer wall of the guide channel is fixedly connected to the top of the outer wall of the base, the inner wall of the base is provided with a groove, the top of the outer wall of the guide channel is provided with a stirring assembly, the bottom of the inner wall of the frame is fixedly connected with a water guide ring, the top of the outer wall of the guide channel is fixedly connected with a concentration sensor, and the inner wall of the frame is provided with a jet assembly.

[0007] As a further description of the above technical solution: The flow guiding mechanism includes an empty chamber, the outer wall of which is fixedly connected to the inner wall of the frame. A flow diversion component is provided on the inner wall of the smoke inlet. An air equalization grid is fixedly connected to the outer wall of the empty chamber. A support ring is fixedly connected to the top of the air equalization grid. A flow guiding inclined plate is fixedly connected to the top of the support ring.

[0008] As a further description of the above technical solution: The spraying mechanism includes a main spray pipe, the top end of which is fixedly connected to the inner wall of the frame, and the outer wall of the main spray pipe is connected to multiple branch pipes, with nozzles connected to the bottom of the outer wall of each branch pipe.

[0009] As a further description of the above technical solution: The stirring assembly includes a first motor, the outer wall of which is fixedly connected to the bottom of the outer wall of the guide channel, a rotating shaft fixedly connected to the output end of the first motor, a first stirring paddle fixedly connected to the top of the rotating shaft, and multiple second motors fixedly connected to the inner wall of the frame, with second stirring paddles fixedly connected to the output ends of the second motors.

[0010] As a further description of the above technical solution: The jet assembly includes multiple guide tubes, the outer wall of which is connected to the outer wall of the water guide ring, and the top end of the guide tube is connected to a fixing ring. Multiple centrifugal nozzles are fixedly connected to the outer wall of the fixing ring.

[0011] As a further description of the above technical solution: The diversion assembly includes a miniature telescopic rod, the outer wall of which is fixedly connected to the inner wall of the smoke inlet. A transmission bar is fixedly connected to the top of the miniature telescopic rod, and two rollers are fixedly connected to the bottom of the outer wall of the transmission bar. A track is slidably connected to the outer wall of the two rollers, and a baffle is fixedly connected to the outer wall of the track. A fixed shaft is rotatably connected to the inner wall of the baffle.

[0012] As a further description of the above technical solution: The outer wall of the frame is connected to two pipes, and the outer walls of the two pipes are connected to the outer wall of the main drain pipe.

[0013] As a further description of the above technical solution: A demister is fixedly connected to the inner wall of the frame, and a smoke outlet is fixedly connected to the outer wall of the frame.

[0014] This utility model has the following beneficial effects: In this invention, a guide channel is provided at the bottom of the slurry tank to allow the slurry to gather near the first stirring paddle. The first stirring paddle works in conjunction with the second stirring paddle to stir the slurry in different directions, thereby enhancing the stirring effect. To further prevent slurry sedimentation, slurry is extracted through a drainage pipe and a centrifugal nozzle and sprayed onto areas prone to sedimentation to avoid excessive differences in slurry concentration at different locations.

[0015] In this invention, a baffle is provided inside the flue gas inlet, the size of which can be adjusted by a micro telescopic rod to control the velocity of the incoming flue gas. After the flue gas enters the empty chamber, it is discharged through the uneven holes of the gas equalization grid to achieve a uniform velocity of the flue gas entering the reaction. At the same time, in order to prevent the slurry from entering the empty chamber and affecting its efficiency, a guide plate is isolated above the empty chamber to guide the flow of the slurry, ensuring the normal operation of the empty chamber and the gas equalization grid. The gas enters the frame at a uniform speed to participate in the reaction. Attached Figure Description

[0016] Figure 1 This is a perspective view of the flue gas desulfurization spray tower proposed in this utility model; Figure 2 This is a front view of the flue gas desulfurization spray tower proposed in this utility model; Figure 3 This is a cross-sectional view of the flue gas desulfurization spray tower proposed in this utility model; Figure 4 This is a cross-sectional view of the stirring mechanism of the flue gas desulfurization spray tower proposed in this utility model; Figure 5 This is a schematic diagram of the flow distribution component of the flue gas desulfurization spray tower proposed in this utility model; Figure 6 This is a cross-sectional view of the flow guiding mechanism of the flue gas desulfurization spray tower proposed in this utility model. Figure 7 This is a partial cross-sectional view of A in the flue gas desulfurization spray tower proposed in this utility model.

[0017] Legend: 1. Frame; 2. Smoke inlet; 3. Base; 4. Stirring mechanism; 401. Guide channel; 402. Groove; 403. Stirring assembly; 4031. First motor; 4032. Rotating shaft; 4033. First stirring paddle; 4034. Second stirring paddle; 4035. Second motor; 404. Water guide ring; 405. Concentration sensor; 406. Jet assembly; 4061. Drainage pipe; 4062. Fixing ring; 4063. Centrifugal... 5. Nozzle; 6. Flow guiding mechanism; 7. Flow splitting assembly; 8. Miniature telescopic rod; 9. Drive bar; 10. Roller; 11. Track; 12. Baffle; 13. Fixed shaft; 14. Empty chamber; 15. Air distribution grid; 16. Support ring; 17. Flow guide plate; 18. Pipe; 29. ​​Smoke outlet; 20. Spraying mechanism; 10. Main spray pipe; 11. Branch pipe; 12. Nozzle; 13. Demister. Detailed Implementation

[0018] 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.

[0019] Reference Figure 1 , Figure 2 and Figure 4 An embodiment of this utility model provides a flue gas desulfurization spray tower, including a frame 1. The main function of the frame 1 is to provide an installation foundation and structural support for various components. The outer wall of the frame 1 is connected to a flue gas inlet 2. The main function of the flue gas inlet 2 is to introduce the flue gas to be treated and start the desulfurization reaction. A base 3 is fixedly connected to the bottom of the outer wall of the frame 1. A stirring mechanism 4 is provided on the top of the outer wall of the base 3. A flow guiding mechanism 5 is provided on the inner wall of the frame 1. Multiple spraying mechanisms 8 are provided on the inner wall of the frame 1. The stirring mechanism 4 includes a guide channel 401, whose main function is to guide the slurry to gather near the stirring component. The bottom of the outer wall of the guide channel 401 is fixedly connected to the top of the outer wall of the base 3. The inner wall of the base 3 has a groove 402. The top of the outer wall of the guide channel 401 is provided with a stirring component 403, whose main function is to stir the slurry and prevent excessive concentration differences in the slurry. The stirring component 403 includes a first motor 4031, the outer wall of which is fixedly connected to the bottom of the outer wall of the guide channel 401. The output end of the first motor 4031 is fixedly connected to a rotating shaft 4032, which provides power to the stirring component. The top of the rotating shaft 4032 is fixedly connected to a first stirring paddle 4033. The inner wall of the frame 1... Multiple second motors 4035 are fixedly connected, and the output end of the second motors 4035 is fixedly connected to a second stirring paddle 4034. A water guide ring 404 is fixedly connected to the bottom of the inner wall of the frame 1. A concentration sensor 405 is fixedly connected to the top of the outer wall of the guide channel 401 to monitor the concentration of the slurry and intelligently adjust the stirring speed. A jet assembly 406 is provided on the inner wall of the frame 1. Its main function is to prevent local slurry sedimentation by spraying water jets. The jet assembly 406 includes multiple guide pipes 4061. The outer wall of the guide pipes 4061 is connected to the outer wall of the water guide ring 404. The top end of the guide pipes 4061 is connected to a fixed ring 4062. Multiple centrifugal nozzles 4063 are fixedly connected to the outer wall of the fixed ring 4062. Specifically, the slurry falling from the upper layer gathers in the center of the guide channel 401, and then the first stirring paddle 4033 fixed on the outer wall of the guide channel 401 stirs the slurry clockwise. At the same time, multiple second stirring paddles 4034 fixed on the inner wall of the frame 1 start to rotate, making the slurry rotate counterclockwise. The dual effect makes the stirring more uniform. In order to further prevent the slurry from settling, multiple guide pipes 4061 are connected to the outer wall of the water guide ring 404. The ends of these pipes are fixedly connected to the fixed ring 4062. Multiple centrifugal nozzles 4063 fixed on the outer wall of the fixed ring 4062 draw up the slurry through the guide pipes 4061 after starting, and then spray the slurry at the bottom through the nozzles 803 connected to the outer wall of the branch pipe 802 to prevent the slurry from accumulating.

[0020] Reference Figure 5 , Figure 6 and Figure 7The flow guiding mechanism 5 includes an empty chamber 502, the outer wall of which is fixedly connected to the inner wall of the frame 1. The inner wall of the smoke inlet 2 is provided with a flow diversion component 501, which includes a miniature telescopic rod 5011. The outer wall of the miniature telescopic rod 5011 is fixedly connected to the inner wall of the smoke inlet 2. The top of the miniature telescopic rod 5011 is fixedly connected to a transmission bar 5012. The bottom of the outer wall of the transmission bar 5012 is fixedly connected to two rollers 5013. The outer walls of the two rollers 5013 are slidably connected to a track 5014. The outer wall of the track 5014 is fixedly connected to a baffle 5015. The inner wall of the baffle 5015 is rotatably connected to a fixed shaft 5016. The outer wall of the empty chamber 502 is fixedly connected to an air equalization grid 503. The top of the air equalization grid 503 is fixedly connected to a support ring 504. The top of the support ring 504 is fixedly connected to a flow guiding inclined plate 505. Specifically, the flue gas entering through the inlet 2 is diverted by the baffle 5015 to prevent the flue gas from directly impacting the inner wall of the frame 1, causing a sudden change in the flow rate and resulting in eddies. The movement of the transmission bar 5012 is controlled by the extension and retraction of the miniature telescopic rod 5011 fixed on the inner wall of the inlet 2. The movement of the transmission bar 5012 controls the opening and closing angle of the baffle 5015 through the roller 5013 and the track 5014, thereby controlling the flow rate of the flue gas. After the flue gas enters the empty chamber 502, in order to control its flow rate uniformly, a uniform air grid 503 is fixedly connected to the outer wall of the empty chamber 502. The number of air holes in the front and rear of the uniform air grid 503 increases from few to many to control the flow rate of the flue gas. To prevent the slurry after the reaction from falling into the empty chamber 502, a support ring 504 is fixedly connected to the top of the uniform air grid 503, and a guide plate 505 is fixedly connected to the top of the support ring 504. The falling slurry flows into the slurry pool under the guidance of the guide plate 505.

[0021] Reference Figure 1 , Figure 2 and Figure 3 Two pipes 6 are connected to the outer wall of the frame 1. The outer walls of the two pipes 6 are connected to the outer wall of the shower head pipe 801. A demister 9 is fixedly connected to the inner wall of the frame 1. A smoke outlet 7 is connected to the outer wall of the frame 1. Specifically, the outer wall of the frame 1 is connected to two pipes 6, which are responsible for transporting the slurry to the main pipe 801 connected to its outer wall. In order to further treat the slurry droplets, a demister 9 is fixedly connected to the inner wall of the frame 1 to block the slurry. The treated flue gas will be discharged through the flue gas outlet 7.

[0022] Working principle: First, the first stirring blade 4033, driven by the first motor 4031, stirs the slurry gathered in the guide channel 401. The multiple second stirring blades 4034, fixed on the inner wall of the frame 1, stir the slurry under the drive of the second motor 4035. The two rotate in opposite directions to make the stirring more uniform. At the same time, the centrifugal nozzle 4063 draws the slurry through the diversion pipe 4061 and sprays the deposited slurry to prevent the slurry from settling. Furthermore, in order to control the uneven flow rate of the incoming flue gas, the opening and closing angle of the baffle 5015 is controlled by the miniature telescopic rod 5011 to divert the flue gas. At the same time, in order to further ensure that the flue gas is uniform in speed during the reaction, a uniform gas grid 503 is fixed on the outer wall of the empty chamber 502, and the distribution of its air holes gradually increases from front to back. In addition, in order to prevent the slurry from entering the empty chamber 502 and affecting the flow rate, a guide plate 505 is provided. Under the guidance of the guide plate, the slurry will not fall into the empty chamber 502, ensuring that the guidance of the empty chamber 502 is not disturbed and that the gas flowing out of the grid has a uniform speed.

[0023] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., 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 flue gas desulfurization spray tower, including a frame (1), characterized in that: The outer wall of the frame (1) is connected to a smoke inlet (2), the bottom of the outer wall of the frame (1) is fixedly connected to a base (3), the top of the outer wall of the base (3) is provided with a stirring mechanism (4), the inner wall of the frame (1) is provided with a flow guiding mechanism (5), and the inner wall of the frame (1) is provided with multiple spraying mechanisms (8). The stirring mechanism (4) includes a guide channel (401), the bottom of the outer wall of the guide channel (401) is fixedly connected to the top of the outer wall of the base (3), the inner wall of the base (3) is provided with a groove (402), the top of the outer wall of the guide channel (401) is provided with a stirring assembly (403), the bottom of the inner wall of the frame (1) is fixedly connected with a water guide ring (404), the top of the outer wall of the guide channel (401) is fixedly connected with a concentration sensor (405), and the inner wall of the frame (1) is provided with a jet assembly (406).

2. The flue gas desulfurization spray tower according to claim 1, characterized in that: The flow guiding mechanism (5) includes an empty chamber (502), the outer wall of which is fixedly connected to the inner wall of the frame (1), the inner wall of the smoke inlet (2) is provided with a flow diversion component (501), the outer wall of which is fixedly connected to a uniform air grid (503), the top of which is fixedly connected to a support ring (504), and the top of which is fixedly connected to a flow guiding inclined plate (505).

3. The flue gas desulfurization spray tower according to claim 1, characterized in that: The spraying mechanism (8) includes a main spray pipe (801), the top of which is connected to the inner wall of the frame (1), and the outer wall of the main spray pipe (801) is connected to multiple branch pipes (802). The bottom of the outer wall of the branch pipe (802) is fixedly connected to a nozzle (803).

4. The flue gas desulfurization spray tower according to claim 1, characterized in that: The stirring assembly (403) includes a first motor (4031), the outer wall of the first motor (4031) is fixedly connected to the bottom of the outer wall of the guide channel (401), the output end of the first motor (4031) is fixedly connected to a rotating shaft (4032), the rotating shaft (4032) is fixedly connected to a first stirring paddle (4033), and the inner wall of the frame (1) is fixedly connected to a plurality of second motors (4035), the output end of the second motors (4035) is fixedly connected to a second stirring paddle (4034).

5. The flue gas desulfurization spray tower according to claim 1, characterized in that: The jet assembly (406) includes multiple drainage pipes (4061), the outer wall of which is connected to the outer wall of the water-guiding ring (404), and the top end of which is connected to a fixing ring (4062). Multiple centrifugal nozzles (4063) are fixedly connected to the outer wall of the fixing ring (4062).

6. The flue gas desulfurization spray tower according to claim 2, characterized in that: The diversion assembly (501) includes a miniature telescopic rod (5011), the outer wall of which is fixedly connected to the inner wall of the smoke inlet (2). A transmission bar (5012) is fixedly connected to the top of the miniature telescopic rod (5011). Two rollers (5013) are fixedly connected to the bottom of the outer wall of the transmission bar (5012). A track (5014) is slidably connected to the outer wall of the two rollers (5013). A baffle (5015) is fixedly connected to the outer wall of the track (5014). A fixed shaft (5016) is rotatably connected to the inner wall of the baffle (5015).

7. The flue gas desulfurization spray tower according to claim 3, characterized in that: The outer wall of the frame (1) is fixedly connected to two pipes (6), and the outer walls of the two pipes (6) are connected to the outer wall of the main pipe (801).

8. The flue gas desulfurization spray tower according to claim 1, characterized in that: A demister (9) is fixedly connected to the inner wall of the frame (1), and a smoke outlet (7) is connected to the outer wall of the frame (1).

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