A flue gas desulfurization spray tower

Abstract

This utility model discloses a flue gas desulfurization spray tower, including a base, a support frame fixedly connected to the top of the base, a tower body fixedly connected to the inner wall of the support frame, and a filtration device at the bottom of the tower body. The filtration device includes a recovery box, a first connecting pipe, a filter screen, filter balls, filter plates, and a water outlet pipe. The recovery box is located below the tower body. This utility model relates to the technical field of desulfurization spray towers. This flue gas desulfurization spray tower, through the cooperation of the recovery box, the first connecting pipe, the filter screen, the filter balls, the filter plates, and the water outlet pipe, achieves the effect of filtering the spray liquid after the flue gas desulfurizes the flue gas. This solves the problems of existing flue gas desulfurization spray towers, where the absorbent liquid in the spray tower carries impurities such as gypsum particles and dust generated during the reaction. If recycled, this may lead to pipe blockage and equipment wear, and the traditional filtration device has a complex structure.

Description

Technical Field

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

[0002] A desulfurization tower is a tower-type equipment used to desulfurize industrial waste gas. It utilizes the principle of water film desulfurization and dust removal and is also known as a granite water film desulfurization and dust removal device or a marble water film desulfurization and dust removal device.

[0003] Existing flue gas desulfurization spray towers generally desulfurize flue gas by making the flue gas and the spray liquid come into countercurrent contact inside the tower and using the liquid to wash the flue gas. However, during the use of existing flue gas desulfurization spray towers, the absorbent liquid inside the spray tower will carry impurities such as gypsum particles and dust generated by the reaction. If it is directly discharged or recycled, it may cause pipe blockage and equipment wear. In addition, traditional filtration devices have complex structures and are difficult to maintain. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a flue gas desulfurization spray tower, which solves the problems of existing flue gas desulfurization spray towers where the absorbent liquid in the spray tower carries impurities such as gypsum particles and dust generated during the reaction. Direct discharge or recycling may lead to pipe blockage and equipment wear, and traditional filtration devices have complex structures and are difficult to maintain.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a flue gas desulfurization spray tower, comprising a base, a support frame fixedly connected to the top of the base, a tower body fixedly connected to the inner wall of the support frame, a filtration device at the bottom of the tower body, the filtration device comprising a recovery box, a first connecting pipe, a filter screen, filter balls, a filter plate, and a water outlet pipe, the recovery box being located below the tower body and fixedly connected to the top of the base, the first connecting pipe connecting the tower body and the recovery box, a filter screen movably connected to the inner wall of the tower body being located above the first connecting pipe, a filter plate fixedly connected to the inner wall of the tower body being located below the filter screen, a filter ball being placed between the filter plate and the filter screen, a water outlet pipe connecting to the bottom of one side of the outer wall of the recovery box, a ball discharge pipe connecting to one side of the outer wall of the tower body, a ball replenishment pipe connecting to the side of the outer wall of the tower body away from the ball discharge pipe, and a sliding door located above the ball discharge pipe, the sliding door being hinged to the outer wall of the tower body via a hinge.

[0006] Preferably, a replenishment device is provided on the side of the recycling tank away from the outlet pipe. The replenishment device includes a water storage tank, a second connecting pipe, a solenoid valve, a pH sensor, and a controller. The water storage tank is fixedly connected to the outer wall of the support frame on the side away from the tower body. The bottom of the water storage tank is connected to the second connecting pipe. The end of the second connecting pipe away from the water storage tank is connected to the solenoid valve. The output end of the solenoid valve passes through the recycling tank. The top and bottom of the inner wall of the recycling tank are fixedly connected to the pH sensor. A controller is fixedly connected to the outer wall of the support frame on the side away from the tower body below the second connecting pipe.

[0007] Preferably, a water pump is connected to the side of the outlet pipe away from the water storage tank, the bottom of the water pump is fixedly connected to the side of the support frame away from the tower body, the output end of the water pump is connected to a circulation pipe, and the other end of the circulation pipe passes through the tower body and extends into the interior of the tower body.

[0008] Preferably, the circulation pipe extends to one side of the tower body and is connected to a water distribution tank. The bottom of the water distribution tank is connected to a number of water spray nozzles at equal intervals. Below the water spray nozzles, a water distribution plate is fixedly connected to the inner wall of the tower body.

[0009] Preferably, an air inlet pipe is connected to the side of the tower body away from the water pump, a support plate is fixedly connected to the inner wall of the tower body below the water distribution plate, a rotating shaft is rotatably connected to the inner wall of the support plate through a sealed bearing, a fan is fixedly connected to the top of the rotating shaft, the fan is parallel to the axial direction of the air inlet pipe, and an air outlet pipe is connected to the top of the tower body.

[0010] Preferably, an oxygen pump is fixedly connected to the outer wall of the tower body away from the water pump below the air inlet pipe. The output end of the oxygen pump is connected to a third connecting pipe. The other end of the third connecting pipe passes through the side wall of the tower body and is fixedly connected to the inner wall of the tower body. Three manhole doors are equidistantly connected to the side of the tower body away from the oxygen pump.

[0011] Beneficial effects This utility model provides a flue gas desulfurization spray tower. It has the following beneficial effects: Through the cooperation of the recovery tank, the first connecting pipe, the filter screen, the filter balls, the filter plates, and the outlet pipe, this flue gas desulfurization spray tower achieves the following: after the flue gas is desulfurized, the spray liquid flows to the bottom of the spray tower under the influence of gravity. The filter screen, filter balls, and filter plates filter the spray liquid, and the filtered spray liquid flows into the recovery tank through the first connecting pipe. This solves the problems of existing flue gas desulfurization spray towers where the absorbent liquid carries impurities such as gypsum particles and dust generated during the reaction. Direct discharge or recycling may lead to pipe blockage and equipment wear. Furthermore, traditional filtration devices have complex structures and are difficult to maintain.

[0012] Through the coordination of the water storage tank, the second connecting pipe, the solenoid valve, the pH sensor, and the controller, the system achieves the following effect: when the recycling tank stores the spray liquid, the pH sensor detects the spray liquid, the controller controls the solenoid valve to open, and the concentrated spray liquid inside the water storage tank enters the recycling tank through the second connecting pipe. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 An exterior schematic diagram; Figure 3 for Figure 1 A schematic diagram of the structure of the filter screen, filter balls, and filter plate; Figure 4 for Figure 1 A schematic diagram of the structure of the water storage tank, the second connecting pipe, and the controller.

[0014] In the diagram: 1. Base; 2. Support frame; 3. Tower body; 4. Recycling bin; 5. First connecting pipe; 6. Filter screen; 7. Filter ball; 8. Filter plate; 9. Water outlet pipe; 10. Water storage tank; 11. Second connecting pipe; 12. Solenoid valve; 13. pH sensor; 14. Controller; 15. Water pump; 16. Circulation pipe; 17. Water distribution tank; 18. Spray nozzle; 19. Water distribution plate; 20. Air inlet pipe; 21. Support plate; 22. Shaft; 23. Fan; 24. Air outlet pipe; 25. Oxygen pump; 26. Third connecting pipe; 27. Manhole door; 28. Ball venting pipe; 29. ​​Ball replenishment pipe; 30. Sliding door. Detailed Implementation

[0015] 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.

[0016] During operation, the absorbent liquid in existing flue gas desulfurization spray towers carries impurities such as gypsum particles and dust generated during the reaction. Direct discharge or recycling may lead to pipe blockage and equipment wear. Furthermore, traditional filtration devices have complex structures and are difficult to maintain.

[0017] In view of this, the present invention provides a flue gas desulfurization spray tower. This flue gas desulfurization spray tower, through the cooperation of a recovery tank, a first connecting pipe, a filter screen, filter balls, filter plates, and a water outlet pipe, achieves the following effect: after the flue gas is desulfurized, the spray liquid flows to the bottom of the spray tower under the influence of gravity. The filter screen, filter balls, and filter plates filter the spray liquid, and the filtered spray liquid flows into the recovery tank through the first connecting pipe. This solves the problem that in existing flue gas desulfurization spray towers, the absorbent liquid inside the spray tower carries impurities such as gypsum particles and dust generated during the reaction. Direct discharge or recycling may lead to pipe blockage and equipment wear. Furthermore, traditional filtration devices have complex structures and are difficult to maintain.

[0018] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle below. The detailed connection methods are well-known technologies in the field. The working principle and process are mainly introduced below.

[0019] Example 1, by Figure 1-4 As can be seen, the flue gas desulfurization spray tower in this case includes a base 1, a support frame 2 fixedly connected to the top of the base 1, a tower body 3 fixedly connected to the inner wall of the support frame 2, and a filtration device at the bottom of the tower body 3. The filtration device includes a recovery box 4, a first connecting pipe 5, a filter screen 6, a filter ball 7, a filter plate 8, and a water outlet pipe 9. The recovery box 4 is located below the tower body 3 and fixedly connected to the top of the base 1. The first connecting pipe 5 connects the tower body 3 and the recovery box 4. A filter screen 6 is movably connected to the inner wall of the tower body 3 above the 5. A filter plate 8 is fixedly connected to the inner wall of the tower body 3 below the filter screen 6. A filter ball 7 is placed between the filter plate 8 and the filter screen 6. A water outlet pipe 9 is connected to the bottom of one side of the outer wall of the recovery box 4. A ball discharge pipe 28 is connected to one side of the outer wall of the tower body 3. A ball replenishment pipe 29 is connected to the side of the outer wall of the tower body 3 away from the ball discharge pipe 28. A sliding door 30 is provided above the ball discharge pipe 28. The sliding door 30 is hinged to the outer wall of the tower body 3 by a hinge. In the specific implementation process, it is worth noting that the base 1 is entirely composed of four channel steels spliced ​​together, ensuring the sturdiness and stability of the base 1. The support frame 2 is made of cast iron or carbon steel, ensuring that the support frame 2 can provide stable support for the tower body 3. The tower body 3 is made of 316L stainless steel, ensuring the corrosion resistance and oxidation resistance of the tower body 3, ensuring that the tower body 3 will not be damaged by external corrosion. The filter balls 7 are made of activated carbon balls of different sizes. The filter balls 7 can absorb sulfides and small particulate matter floating in the spray liquid. 6 is fixed to the inner wall of the tower body 3 by bolts. When it is necessary to clean or replace the filter screen 6 and filter balls 7, the filter screen 6 and filter balls 7 can be cleaned or replaced by rotating the bolts. The surface of the filter plate 8 has several water passage holes. The filter plate 8 provides stable support for the filter balls 7. Through the cooperation of the recovery box 4, the first connecting pipe 5, the filter screen 6, the filter balls 7, the filter plate 8 and the water outlet pipe 9, when the spray liquid is affected by gravity, it flows into the bottom of the tower body 3. The filter screen 6 filters impurities and solid particles in the spray liquid, and the filter balls 7 filter and decolorize the spray liquid. The spray liquid flows into the bottom of the tower body 3 through the water passage holes of the filter plate 8, and enters the recovery tank 4 through the first connecting pipe 5. The filtered spray liquid is discharged from the recovery tank 4 through the outlet pipe 9. The recovery tank 4 is made of thickened engineering plastic, which is not only lightweight, but also has strong wear resistance and corrosion resistance. The first connecting pipe 5 is made of stainless steel, and the inner wall of the first connecting pipe 5 is coated with polyethylene material to ensure that the first connecting pipe 5 and the recovery tank 4 will not be corroded by the spray liquid. In order to prevent the spray liquid from overflowing from the inside of the tower body 3, a sliding door 30 and a connection to the tower body 3 can be used. A locking device is installed between the two parts to fix the sliding door 30. A sealing gasket is fixedly connected between the sliding door 30 and the tower body 3 to prevent the spray liquid from overflowing from the tower body 3. Through the cooperation between the ball discharge pipe 28, the ball replenishment pipe 29 and the sliding door 30, when the filter ball 7 needs to be replaced, first open the ball discharge pipe 28, and the filter ball 7 is discharged from the tower body 3 under the action of gravity. After that, close the ball discharge pipe 28 with bolts, then open the ball replenishment pipe 29 to replenish new filter balls 7, and replace the filter screen 6 by pulling open the sliding door 30. Furthermore, a replenishment device is provided on the side of the recycling tank 4 away from the outlet pipe 9. The replenishment device includes a water storage tank 10, a second connecting pipe 11, a solenoid valve 12, a pH sensor 13, and a controller 14. The water storage tank 10 is fixedly connected to the outer wall of the support frame 2 on the side away from the tower body 3. The bottom of the water storage tank 10 is connected to the second connecting pipe 11. The end of the second connecting pipe 11 away from the water storage tank 10 passes through the support frame 2 and is connected to the solenoid valve 12. The output end of the solenoid valve 12 is connected to one side of the recycling tank 4. The pH sensor 13 is fixedly connected to the top and bottom of the inner wall of the recycling tank 4. The controller 14 is fixedly connected to the outer wall of the support frame 2 on the side away from the tower body 3 below the second connecting pipe 11. In the specific implementation process, it is worth noting that a fixing plate is fixedly connected to the bottom of the water storage tank 10. The fixing plate is fixedly connected to the outer wall of the support frame 2, and the fixing plate fixes the water storage tank 10. The inner wall of the water storage tank 10 is coated with a polyethylene coating to ensure that the water storage tank 10 will not be damaged by the corrosion of the spray liquid. The inside of the water storage tank 10 contains concentrated spray liquid. The solenoid valve 12 is a step-by-step direct-acting type to ensure that the solenoid valve 12 can meet the actual use requirements. The controller 14 is a PLC type, which has the characteristics of strong anti-interference and high accuracy. The pH sensor 13 is a LE438 type, which has high corrosion resistance to ensure that the pH sensor 13 can be used in the spray liquid for a long time. When installing the pH sensor 13, firstly, a hole is drilled on the surface of the recovery box 4 and a waterproof gland is installed. After the line of the pH sensor 13 passes through the gland, the nut is tightened. A water-sealed rubber ring is used for sealing. The circuit of the pH sensor 13 is made of shielded twisted pair cable to ensure that the pH sensor 13 can transmit data out of the recycling tank 4. A vent hole is connected to the top side of the outer wall of the water tank 10. Through the cooperation between the water tank 10, the second connecting pipe 11, the solenoid valve 12, the pH sensor 13 and the controller 14, the pH sensor 13 detects the pH value of the spray liquid. When the pH value of the spray liquid is less than 5.0, it sends an electrical signal to the controller 14. The controller 14 receives the electrical signal from the pH sensor 13 and converts the electrical signal into information data. The controller 14 drives the solenoid valve 12 to be energized. Under the influence of gravity, the concentrated spray liquid inside the water tank 10 enters the recycling tank 4 through the second connecting pipe 11 and the solenoid valve 12. When the pH sensor 13 detects that the pH value of the spray liquid is greater than 6.5, it transmits an electrical signal to the controller 14. The controller 14 drives the solenoid valve 12 to be de-energized. Furthermore, a water pump 15 is connected to the side of the water outlet pipe 9 away from the water storage tank 10. The bottom of the water pump 15 is fixedly connected to the side of the support frame 2 away from the tower body 3. The output end of the water pump 15 is connected to a circulation pipe 16. The other end of the circulation pipe 16 passes through the tower body 3 and extends into the interior of the tower body 3. In the specific implementation process, it is worth noting that the water pump 15 is an IH type multistage centrifugal pump to ensure that the water pump 15 can meet the actual use requirements. The circulation pipe 16 consists of one vertical pipe and two horizontal pipes. Both horizontal pipes penetrate the tower body 3 and extend into the interior of the tower body 3. Through the cooperation between the water pump 15 and the circulation pipe 16, the water pump 15 draws the spray liquid inside the recovery tank 4 and transports the spray liquid back to the top of the tower body 3 through the circulation pipe 16. Example 2, by Figure 1-4 It can be seen that the circulation pipe 16 extends to one side of the tower body 3 and is connected to the water distribution tank 17. Several water spray nozzles 18 are connected at equal intervals at the bottom of the water distribution tank 17. A water distribution plate 19 is fixedly connected to the inner wall of the tower body 3 below the water spray nozzles 18. In the specific implementation process, it is worth noting that several water spray pipes are equidistantly connected at the bottom of the water distribution plate 19. The flue gas below the water distribution plate 19 enters the area above the water distribution plate 19 through the water spray pipes of the water distribution plate 19. A fixing frame is fixedly connected to the side of the outer wall of the water distribution tank 17 away from the circulation pipe 16. The fixing frame is fixedly connected to the inner wall of the tower body 3. The fixing frame fixes and supports the water distribution tank 17. Through the cooperation between the water distribution tank 17, the water spray nozzles 18 and the water distribution plate 19, the water distribution tank 17 delivers the spray liquid to the interior of multiple water spray nozzles 18, and disperses the spray liquid into a fine water mist through the water spray nozzles 18. The water mist falls on the top of the water distribution plate 19 and increases the contact area between the flue gas and the spray liquid. The spray liquid washes and desulfurizes the flue gas. Furthermore, an air inlet pipe 20 is connected to the side of the tower body 3 away from the water pump 15. A support plate 21 is fixedly connected to the inner wall of the tower body 3 below the water distribution plate 19. A rotating shaft 22 is rotatably connected to the inner wall of the support plate 21 through a sealed bearing. A fan 23 is fixedly connected to the top of the rotating shaft 22. The fan 23 is parallel to the axial direction of the air inlet pipe 20. An air outlet pipe 24 is connected to the top of the tower body 3. In the specific implementation process, it is worth noting that the surface of the support plate 21 is provided with several round holes. The spray liquid flows into the bottom of the tower body 3 through the round holes. Through the cooperation between the air inlet pipe 20, the support plate 21, the rotating shaft 22, the fan 23 and the air outlet pipe 24, the staff first connects the air inlet pipe 20 to the external flue gas pipe. The flue gas passes through the air inlet pipe 20 and drives the fan 23 to rotate around the rotating shaft 22. The fan 23 stirs the flue gas, mixes the high-concentration flue gas and the low-concentration flue gas, so that the flue gas inside the tower body 3 is evenly distributed. After desulfurization, the gas leaves the inside of the tower body 3 through the air outlet pipe 24. This is conducive to the full reaction of the flue gas and the spray liquid after desulfurization, ensuring the desulfurization effect. Furthermore, below the air inlet pipe 20, an oxygen pump 25 is fixedly connected to the outer wall of the tower body 3 on the side away from the water pump 15. The output end of the oxygen pump 25 is connected to a third connecting pipe 26. The other end of the third connecting pipe 26 passes through the side wall of the tower body 3 and is fixedly connected to the inner wall of the tower body 3. Three manhole doors 27 are equidistantly connected to the side of the tower body 3 away from the oxygen pump 25. In the specific implementation process, it is worth noting that the oxygen pump 25 is an impeller-type aerator to ensure that it can meet the actual needs of the deoxygenation process. Several dispersion holes are opened on the surface of the third connecting pipe 26, through which oxygen enters the tower body 3. The oxygen pump 25 drives the impeller to rotate, drawing air into its input end and compressing it. The compressed oxygen then enters the tower body 3 through the third connecting pipe 26. The spray liquid at the bottom of the tower body 3 comes into contact with the oxygen. The ammonium sulfate in the spray liquid is located at the top of the filter screen 6. To prevent excessive crystallization inside tower 3 from clogging the pipes, the staff can clean the inside of tower 3 regularly. The manhole door 27 consists of a door frame and a door panel. A sealing ring is fixedly connected between the door frame and the door panel to prevent liquid from overflowing from inside tower 3. The door frame and the door panel are fixed with fixing bolts. When it is necessary to clean the inside of tower 3, the staff first drills a hole in the door panel of manhole door 27 and enters the inside of tower 3 to clean the crystals adsorbed on the inner wall of tower 3 and maintain the devices inside tower 3. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flue gas desulfurization spray tower, comprising a base (1), characterized in that: The top of the base (1) is fixedly connected to a support frame (2), the inner wall of the support frame (2) is fixedly connected to a tower body (3), and a filter device is provided at the bottom of the tower body (3). The filtration device includes a recovery box (4), a first connecting pipe (5), a filter screen (6), a filter ball (7), a filter plate (8), and an outlet pipe (9); The recycling bin (4) is located below the tower body (3) and is fixedly connected to the top of the base (1). A first connecting pipe (5) is connected between the tower body (3) and the recycling bin (4). A filter screen (6) is movably connected to the inner wall of the tower body (3) above the first connecting pipe (5). A filter plate (8) is fixedly connected to the inner wall of the tower body (3) below the filter screen (6). A filter ball (7) is placed between the filter plate (8) and the filter screen (6). A water outlet pipe (9) is connected to the bottom of one side of the outer wall of the recycling bin (4). A volleyball pipe (28) is connected to one side of the outer wall of the tower body (3). A ball replenishment pipe (29) is connected to the side of the outer wall of the tower body (3) away from the volleyball pipe (28). A sliding door (30) is provided above the volleyball pipe (28). The sliding door (30) is hinged to the outer wall of the tower body (3) by a hinge.

2. The flue gas desulfurization spray tower according to claim 1, characterized in that: A medicine replenishment device is provided on the side of the recycling box (4) away from the water outlet pipe (9); The medication replenishment device includes a water tank (10), a second connecting pipe (11), a solenoid valve (12), a pH sensor (13), and a controller (14). The water storage tank (10) is fixedly connected to the outer wall of the support frame (2) on the side away from the tower body (3). The bottom of the water storage tank (10) is connected to a second connecting pipe (11). The end of the second connecting pipe (11) away from the water storage tank (10) is connected to a solenoid valve (12). The output end of the solenoid valve (12) is connected to one side of the recycling box (4). The top and bottom of the inner wall of the recycling box (4) are both fixedly connected to a pH sensor (13). Below the second connecting pipe (11) is a controller (14) fixedly connected to the outer wall of the support frame (2) on the side away from the tower body (3).

3. The flue gas desulfurization spray tower according to claim 2, characterized in that: The water outlet pipe (9) is connected to a water pump (15) on the side away from the water storage tank (10). The bottom of the water pump (15) is fixedly connected to the support frame (2) on the side away from the tower body (3). The output end of the water pump (15) is connected to a circulation pipe (16). The other end of the circulation pipe (16) passes through the tower body (3) and extends into the interior of the tower body (3).

4. The flue gas desulfurization spray tower according to claim 3, characterized in that: The circulation pipe (16) extends to one side of the tower body (3) and is connected to a water distribution tank (17). Several water spray nozzles (18) are equidistantly connected to the bottom of the water distribution tank (17). A water distribution plate (19) is provided below the water spray nozzles (18) and is fixedly connected to the inner wall of the tower body (3) by bolts.

5. A flue gas desulfurization spray tower according to claim 4, characterized in that: The tower body (3) is connected to an air inlet pipe (20) on the side away from the water pump (15). A support plate (21) is fixedly connected to the inner wall of the tower body (3) below the water distribution plate (19). A rotating shaft (22) is rotatably connected to the inner wall of the support plate (21) through a sealed bearing. A fan (23) is fixedly connected to the top of the rotating shaft (22). The fan (23) is parallel to the axial direction of the air inlet pipe (20). An air outlet pipe (24) is connected to the top of the tower body (3).

6. A flue gas desulfurization spray tower according to claim 5, characterized in that: Below the air inlet pipe (20), there is an oxygen pump (25) fixedly connected to the outer wall of the tower body (3) away from the water pump (15). The output end of the oxygen pump (25) is connected to a third connecting pipe (26). The other end of the third connecting pipe (26) passes through the side wall of the tower body (3) and is fixedly connected to the inner wall of the tower body (3). Three manhole doors (27) are equidistantly connected to the side of the tower body (3) away from the oxygen pump (25).

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