Flue gas purification system

Abstract

The utility model discloses a flue gas purification system, which belongs to the technical field of flue gas desulfurization and comprises a spraying bin, a gas inlet structure arranged in the spraying bin and used for guiding flue gas to circulate in the spraying bin, and a spraying structure arranged in the spraying bin and used for spraying limestone solution. When the device is used, a flue gas pipeline can be communicated with the flue gas inlet pipe for conveying, meanwhile, the conveying pipe can be communicated with a limestone solution conveying pipe, the limestone solution is sprayed out through the spray head and the conveying spray pipe, and the flue gas can be discharged by the flue gas outlet holes and can move circularly at the same time by starting the motor, so that the flue gas can be uniformly distributed in the spraying bin; the flue gas is in full contact with a limestone solution, then the flue gas is guided by the spiral guide plate to move upwards spirally, the residence time of the flue gas in the spraying bin is prolonged, the flue gas can be sprayed for multiple times in cooperation with the spray head, the flue gas can react with the limestone solution more sufficiently, the amount of unreacted flue gas is reduced, and the desulfurization effect is further improved.

Description

Technical Field

[0001] This utility model relates to the field of flue gas desulfurization technology, specifically to a flue gas purification system. Background Technology

[0002] Flue gas purification refers to the use of treatment technologies to eliminate pollutants in flue gas to control flue gas emissions and effectively improve air quality. Flue gas desulfurization refers to the process of removing sulfur oxides from flue gas or other industrial waste gas. Desulfurizing agents (such as limestone, ammonia water, etc.) can be used to react chemically with sulfur dioxide (SO2) in flue gas to generate harmless substances such as sulfates.

[0003] Chinese Patent Publication No. CN113617198B discloses a flue gas desulfurization and purification system, including a gas conveying device, a desulfurization tower, a slurry preparation device, a slurry conveying device, and a slurry recovery device. The gas conveying device is used to convey flue gas into the desulfurization tower. This invention utilizes the arrangement of blades, which scrape the inner wall of the tower under the blowing of flue gas. This causes scale particles on the inner wall of the tower to fall off, preventing the accumulation of scale. On the one hand, this prevents the scale from becoming too large when it falls off, thus blocking the slurry recovery pipe. On the other hand, the blades guide the flue gas. When there is a lot of scale on the inner wall of the tower, the scraping speed of the blades is reduced due to the scale obstruction, resulting in a decrease in the flue gas velocity at the blades. This increases the contact time between the flue gas and the alkaline limestone solution, enhancing the desulfurization effect of the alkaline limestone solution on the flue gas, thereby improving the desulfurization efficiency of the desulfurization tower.

[0004] In the aforementioned prior art, desulfurization can be achieved by spraying limestone solution to react with flue gas. The flue gas will have its flow velocity reduced under the guidance of the blades. However, the blades can rotate during use, and the rotating blades will accelerate the upward speed of the flue gas. The effect of limiting the flow velocity of the flue gas by relying solely on the guidance of the blades is limited, resulting in insufficient contact time between the sprayed solution and the flue gas, thereby reducing the purification effect. Utility Model Content

[0005] In view of the above-mentioned technical deficiencies, the purpose of this utility model is to provide a flue gas purification system to solve some or all of the problems in the background art.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A flue gas purification system, comprising:

[0008] Spray chamber;

[0009] The air intake structure is located inside the spray chamber and is used to guide the flue gas to circulate within the spray chamber.

[0010] The spray structure, located inside the spray chamber, is used to spray limestone solution;

[0011] The filter structure, arranged inside the spray chamber, works in conjunction with the air intake structure to filter particulate impurities.

[0012] Preferably, the air intake structure includes:

[0013] The support frame is located inside the spray chamber;

[0014] A ring-shaped tube is arranged above the support frame;

[0015] A connecting sleeve is rotatably fitted onto the annular pipe and connected to the annular pipe;

[0016] Several smoke outlets are located inside the connecting sleeve and are used to transport flue gas into the spray chamber.

[0017] The flue gas inlet pipe passes through the spray chamber and is located below the annular pipe. The flue gas inlet pipe is connected to the annular pipe and is used to transport flue gas.

[0018] The exhaust pipe is located above and connected to the spray chamber, and is used to exhaust the flue gas inside the spray chamber.

[0019] A drive component, arranged on the connecting sleeve, is used to control the rotation of the connecting sleeve;

[0020] The flow guiding component, located inside the spray chamber, is used to guide the direction of flue gas flow.

[0021] Preferably, the driving component includes:

[0022] A bevel-toothed ring is fixedly fitted onto the connecting sleeve;

[0023] The motor is located on one side of the spray chamber;

[0024] The bevel gear is located on the output end of the motor. The bevel gear meshes with the bevel ring gear and is used for transmission.

[0025] Preferably, the driving assembly further includes a limiting ring fixedly sleeved on the annular tube and an annular groove formed inside the communicating sleeve. The limiting ring is rotatably installed in the annular groove to limit the rotational position of the communicating sleeve.

[0026] Preferably, the flow guiding component includes:

[0027] Support columns are installed inside the spray chamber;

[0028] Spiral guide plates are arranged inside the spray chamber and are fixedly sleeved on the support columns.

[0029] Preferably, the spray structure includes:

[0030] The delivery pipes are arranged inside the spray chamber and the support columns;

[0031] Several connecting pipes all pass through the support column and are arranged on the conveying pipe, and the connecting pipes are connected to the conveying pipe;

[0032] Several nozzles are arranged on corresponding connecting pipes;

[0033] Several delivery nozzles are evenly arranged on the delivery pipe, and the delivery nozzles are located below the spiral guide plate.

[0034] Preferably, the filter structure includes:

[0035] The connecting rod can be detachably installed inside the spray chamber;

[0036] The flue gas filter plate is arranged on one side of the connecting rod and is movably installed inside the spiral guide plate.

[0037] A fixed frame is positioned on the bottom side of the connecting rod;

[0038] The solution filter plate is arranged inside the fixed frame and is located inside the spray chamber.

[0039] The positioning groove is formed inside the support column, and the connecting pipe is movably installed in the positioning groove.

[0040] Preferably, the filter structure further includes a bolt movably installed inside the connecting rod, one end of which is threaded inside the spray chamber to fix the position of the connecting rod.

[0041] The beneficial effects of this utility model are as follows:

[0042] This invention allows for the connection of a flue gas pipeline to an inlet pipe for transport, and simultaneously, the transport pipe to a limestone solution transport pipe. The limestone solution is sprayed out through nozzles and the transport pipe. By activating the motor, the flue gas outlet can rotate in a circular motion while discharging the flue gas, ensuring even distribution of the flue gas within the spray chamber and full contact with the limestone solution. Subsequently, guided by a spiral guide plate, the flue gas spirals upward, increasing its residence time within the spray chamber. Combined with the nozzles, multiple sprays of the flue gas can be achieved, allowing for more thorough reaction between the flue gas and the limestone solution, reducing the amount of unreacted flue gas, and further improving the desulfurization effect.

[0043] In this invention, as the flue gas moves upward within the spiral guide plate, it passes through the flue gas filter plate. The flue gas filter plate can further filter particulate impurities in the flue gas, while the sprayed limestone solution is filtered through the solution filter plate before being discharged for recycling and reuse. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0045] Figure 1 A schematic diagram of the structure of a flue gas purification system provided in an embodiment of this utility model;

[0046] Figure 2 This is a side view of a flue gas purification system provided in an embodiment of the present invention.

[0047] Figure 3 This is a cross-sectional structural diagram of a flue gas purification system provided in an embodiment of the present utility model;

[0048] Figure 4 A schematic diagram of the connecting sleeve structure of a flue gas purification system provided in this embodiment of the present utility model;

[0049] Figure 5 A schematic diagram of a spiral guide plate structure for a flue gas purification system provided in this embodiment of the present utility model.

[0050] Explanation of reference numerals in the attached figures:

[0051] 1. Spray chamber; 2. Support frame; 201. Annular pipe; 202. Connecting sleeve; 203. Smoke outlet; 204. Smoke inlet pipe; 205. Smoke exhaust pipe; 206. Bevel gear ring; 207. Motor; 208. Bevel gear; 209. Limiting ring; 210. Annular groove; 211. Support column; 212. Spiral guide plate; 3. Conveying pipe; 301. Connecting pipe; 302. Nozzle; 303. Conveying spray pipe; 4. Connecting rod; 401. Smoke filter plate; 402. Fixing frame; 403. Solution filter plate; 404. Positioning groove; 405. Bolt. Detailed Implementation

[0052] 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.

[0053] Example 1:

[0054] like Figures 1 to 5As shown, this utility model provides a flue gas purification system, including: a spray chamber 1 and an air intake structure arranged inside the spray chamber 1 for guiding the flue gas to circulate within the spray chamber 1, and a spray structure arranged inside the spray chamber 1 for spraying limestone solution.

[0055] The air intake structure includes a support frame 2 arranged inside the spray chamber 1, an annular pipe 201 arranged above the support frame 2, a connecting sleeve 202 rotatably sleeved on and connected to the annular pipe 201, several smoke outlet holes 203 opened inside the connecting sleeve 202 for conveying flue gas to the spray chamber 1, a smoke inlet pipe 204 passing through the spray chamber 1 and arranged below the annular pipe 201 for conveying flue gas, the smoke inlet pipe 204 being connected to the annular pipe 201, a smoke exhaust pipe 205 arranged above and connected to the spray chamber 1 for discharging flue gas from the spray chamber 1, a drive component arranged on the connecting sleeve 202 for controlling the rotation of the connecting sleeve 202, and a flow guide component arranged inside the spray chamber 1 for guiding the flow direction of the flue gas. The flue gas is conveyed to the annular pipe 201 through the smoke inlet pipe 204, and then the flue gas enters the interior of the spray chamber 1 through the smoke outlet holes 203 on the connecting sleeve 202.

[0056] Specifically, the drive assembly includes a bevel ring 206 fixedly sleeved on the connecting sleeve 202, a motor 207 arranged on one side of the spray chamber 1, and a bevel gear 208 arranged on the output end of the motor 207 for transmission. The bevel gear 208 meshes with the bevel ring 206. The motor 207 is turned on to control the rotation of the bevel gear 208. When the bevel gear 208 rotates, it can drive the connecting sleeve 202 to rotate through meshing with the bevel ring 206. The rotating connecting sleeve 202 will drive the smoke outlet 203 to rotate in a circular motion, so that the smoke outlet 203 can evenly deliver the flue gas into the spray chamber 1 and avoid the flue gas from being too concentrated.

[0057] Specifically, the drive assembly also includes a limiting ring 209 fixedly sleeved on the annular tube 201 to limit the rotational position of the connecting sleeve 202, and an annular groove 210 opened inside the connecting sleeve 202. The limiting ring 209 is rotatably installed in the annular groove 210. When the connecting sleeve 202 rotates, it can rotate on the limiting ring 209 through the annular groove 210. The setting of the limiting ring 209 and the annular groove 210 can prevent the position of the connecting sleeve 202 from shifting during rotation.

[0058] Specifically, the flow guiding component includes a support column 211 arranged inside the spray chamber 1 and a spiral guide plate 212 arranged inside the spray chamber 1. The spiral guide plate 212 is fixedly sleeved on the support column 211. The flue gas will flow upward naturally in the spray chamber 1. Under the guidance of the spiral guide plate 212, the flue gas can move spirally upward, increasing the residence time of the flue gas in the spray chamber 1.

[0059] The spray structure includes a conveying pipe 3 arranged inside the spray chamber 1 and the support column 211, several connecting pipes 301 passing through the support column 211 and arranged on the conveying pipe 3, the connecting pipes 301 being connected to the conveying pipe 3, several nozzles 302 arranged on the corresponding connecting pipes 301, and several conveying spray pipes 303 evenly arranged on the conveying pipe 3. The conveying spray pipes 303 are located below the spiral guide plate 212. The conveying pipe 3 is connected to the conveying pipe of limestone solution, and the limestone solution is conveyed into the conveying pipe 3 and then sprayed out through the conveying spray pipes 303 to contact the flue gas for desulfurization. Some of the solution can be sprayed out from the nozzles 302 through the connecting pipes 301 to spray the passing flue gas multiple times.

[0060] Example 2:

[0061] Based on Example 1, in order to filter out dust impurities in the flue gas and filter the sprayed limestone solution, a filter structure for filtering particulate impurities is arranged inside the spray chamber 1.

[0062] The filtration structure includes a connecting rod 4 detachably installed inside the spray chamber 1, a flue gas filter plate 401 arranged on one side of the connecting rod 4, the flue gas filter plate 401 being movably installed inside the spiral guide plate 212, a fixed frame 402 arranged on the bottom side of the connecting rod 4, a solution filter plate 403 arranged inside the fixed frame 402, the solution filter plate 403 being located inside the spray chamber 1, a positioning groove 404 opened inside the support column 211, and a connecting pipe 301 being movably installed in the positioning groove 404. When the flue gas passes through the spiral guide plate 212, the flue gas filter plate 401 can further filter out particulate impurities, while the sprayed limestone solution will flow downwards and be discharged after being filtered by the solution filter plate 403.

[0063] The filter structure also includes a bolt 405 that is movably installed inside the connecting rod 4 to fix the position of the connecting rod 4. One end of the bolt 405 is threaded inside the spray chamber 1. By unscrewing the bolt 405, the connection restriction between the connecting rod 4 and the spray chamber 1 can be released. At this time, the connecting rod 4 can be pulled to remove the flue gas filter plate 401 and the solution filter plate 403 from the spray chamber 1 for cleaning.

[0064] Working principle: Flue gas is conveyed into the annular pipe 201 through the inlet pipe 204. Then, the flue gas enters the spray chamber 1 through the outlet hole 203 on the connecting sleeve 202. Simultaneously, the motor 207 can be turned on to control the rotation of the bevel gear 208. When the bevel gear 208 rotates, it meshes with the bevel gear ring 206, driving the connecting sleeve 202 to rotate. The rotating connecting sleeve 202 causes the outlet hole 203 to rotate circumferentially. During this process, the connecting sleeve 202 and the annular pipe 201 remain connected, ensuring that the outlet hole 203 evenly distributes the flue gas into the spray chamber 1, preventing excessive concentration of flue gas. At the same time, the conveying pipe 3 can be connected to the limestone solution conveying pipe, conveying the limestone solution into the conveying pipe 3. The solution is then sprayed out through the conveying spray pipe 303, contacting the flue gas for desulfurization. Afterwards, the flue gas will... The flue gas flows upwards, and under the guidance of the spiral guide plate 212, it can move upwards in a spiral motion, increasing the residence time of the flue gas in the spray chamber 1. At the same time, some of the solution can be sprayed out from the nozzle 302 through the connecting pipe 301, spraying the passing flue gas multiple times to improve the desulfurization effect. The sprayed limestone solution will flow downwards, be filtered by the solution filter plate 403 and then discharged, making it convenient to recover the limestone solution for reuse. When the flue gas passes through the spiral guide plate 212, the flue gas filter plate 401 can further filter out particulate impurities. By unscrewing the bolt 405, the connection restriction between the connecting rod 4 and the spray chamber 1 can be released. At this time, the connecting rod 4 can be pulled to pull the flue gas filter plate 401 and the solution filter plate 403 out of the spray chamber 1, thereby cleaning the particulate impurities attached to their surfaces.

[0065] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A flue gas purification system, characterized in that, include: Spray chamber (1); An air intake structure is arranged inside the spray chamber (1) to guide the flue gas to circulate within the spray chamber (1); The spray structure is arranged inside the spray chamber (1) and is used to spray limestone solution; The filter structure is arranged inside the spray chamber (1) and works in conjunction with the air intake structure to filter particulate impurities.

2. The flue gas purification system as described in claim 1, characterized in that, The air intake structure includes: The support frame (2) is arranged inside the spray chamber (1); The annular tube (201) is arranged above the support frame (2); The connecting sleeve (202) is rotatably sleeved on the annular pipe (201) and connected to the annular pipe (201); Several smoke outlets (203) are all opened inside the connecting sleeve (202) for conveying flue gas to the spray chamber (1); The flue gas inlet pipe (204) passes through the spray chamber (1) and is arranged below the annular pipe (201). The flue gas inlet pipe (204) is connected to the annular pipe (201) and is used to transport flue gas. The exhaust pipe (205) is arranged above the spray chamber (1) and connected to the spray chamber (1) to exhaust the flue gas in the spray chamber (1); A drive assembly, arranged on the connecting sleeve (202), is used to control the rotation of the connecting sleeve (202); A flow guiding component is arranged inside the spray chamber (1) to guide the flow direction of flue gas.

3. The flue gas purification system as described in claim 2, characterized in that, The driving component includes: A bevel-toothed ring (206) is fixedly sleeved on the connecting sleeve (202); The motor (207) is located on one side of the spray chamber (1); A bevel gear (208) is arranged on the output end of the motor (207). The bevel gear (208) meshes with the bevel ring (206) for transmission.

4. The flue gas purification system as described in claim 2, characterized in that, The drive assembly also includes a limiting ring (209) fixedly sleeved on the annular tube (201) and an annular groove (210) opened inside the connecting sleeve (202). The limiting ring (209) is rotatably installed in the annular groove (210) to limit the rotation position of the connecting sleeve (202).

5. The flue gas purification system as described in claim 2, characterized in that, The flow guiding component includes: Support columns (211) are arranged inside the spray chamber (1); A spiral guide plate (212) is arranged inside the spray chamber (1) and fixedly sleeved on the support column (211).

6. The flue gas purification system as described in claim 1, characterized in that, The spray structure includes: The conveying pipe (3) is arranged inside the spray chamber (1) and the support column (211); Several connecting pipes (301) pass through the support column (211) and are arranged on the conveying pipe (3). The connecting pipes (301) are connected to the conveying pipe (3). Several nozzles (302) are arranged on corresponding connecting pipes (301); Several delivery nozzles (303) are evenly arranged on the delivery pipe (3), and the delivery nozzles (303) are located below the spiral guide plate (212).

7. The flue gas purification system as described in claim 1, characterized in that, The filtering structure includes: The connecting rod (4) is detachably installed inside the spray chamber (1); The flue gas filter plate (401) is arranged on one side of the connecting rod (4), and the flue gas filter plate (401) is movably installed inside the spiral guide plate (212); A fixed frame (402) is arranged on the bottom side of the connecting rod (4); The solution filter plate (403) is arranged inside the fixed frame (402) and is located inside the spray chamber (1); The positioning groove (404) is opened inside the support column (211), and the connecting pipe (301) is movably installed in the positioning groove (404).

8. The flue gas purification system as described in claim 1, characterized in that, The filter structure also includes a bolt (405) that is movably installed inside the connecting rod (4). One end of the bolt (405) is threaded inside the spray chamber (1) to fix the position of the connecting rod (4).

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