A boiler exhaust gas desulfurization device

Abstract

The utility model discloses a kind of boiler waste gas desulfurization devices, including bottom plate, the top of the bottom plate is fixedly connected with first box, the top of the first box is communicated with exhaust port, the lower portion of the exhaust port is provided with processing device, processing device includes water distribution tank, motor, connecting column and stirring vane, the water distribution tank is fixedly connected to the inner wall top of second box.This utility model relates to the technical field of boiler waste gas treatment device, the boiler waste gas desulfurization device, by the cooperation between water distribution tank, motor, connecting column and stirring vane, realize when desulfurization to boiler waste gas, the effect that stirring vane stirs lime water inside water distribution tank, solve the lime water containing not completely dissolved lime particles when the existing boiler waste gas desulfurization device works, further cause lime water concentration unstable, further influence the efficiency of desulfurization, and the lime particles that settle can possibly jam the nozzle of desulfurization device, increase maintenance cost and downtime problem.

Description

Technical Field

[0001] This utility model relates to the technical field of boiler exhaust gas treatment devices, specifically a boiler exhaust gas desulfurization device. Background Technology

[0002] With rapid economic development, the number of electric furnaces for metallurgical steelmaking and boilers fueled by raw coal has increased significantly. The air pollutants emitted by these furnaces and kilns cause great harm to the surrounding environment. Therefore, technologies for removing particulate matter from dusty gases to reduce their emissions into the atmosphere are becoming increasingly important.

[0003] Existing boiler flue gas desulfurization devices generally use lime water as an absorbent to react with sulfides in the flue gas to desulfurize the boiler flue gas.

[0004] However, when existing boiler exhaust gas desulfurization devices are in operation, the lime water contains incompletely dissolved lime particles. These lime particles are prone to settling, which leads to unstable lime water concentration and affects desulfurization efficiency. Furthermore, the settled lime particles may clog the nozzles of the desulfurization device, thus affecting the normal operation of the boiler exhaust gas desulfurization device and increasing maintenance costs and downtime. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a boiler exhaust gas desulfurization device, which solves the problem that in existing boiler exhaust gas desulfurization devices, undissolved lime particles in the lime water easily settle, leading to unstable lime water concentration, which in turn affects desulfurization efficiency. Furthermore, the settled lime particles may clog the nozzles of the desulfurization device, thus affecting the normal operation of the boiler exhaust gas desulfurization device and increasing maintenance costs and downtime.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a boiler exhaust gas desulfurization device, comprising a base plate, a first housing fixedly connected to the top of the base plate, an exhaust port connected to the top of the first housing, and a processing device disposed below the exhaust port. The processing device includes a water distribution tank, a first filter screen, a second filter screen, a motor, a connecting column, and stirring blades. The water distribution tank is fixedly connected to the top of the inner wall of the second housing. The first filter screen is disposed below the inner wall of the water distribution tank, and the second filter screen is attached to the bottom of the first filter screen. A motor is fixedly connected to the outer wall of the first housing on one side of the water distribution tank. The output end of the motor passes through the first housing through a sealed bearing and is fixedly connected to a connecting column. The connecting column passes through the outer wall of the water distribution tank through a sealed bearing. Several stirring blades are fixedly connected at equal intervals on the outer wall of the connecting column located inside the water distribution tank.

[0007] Preferably, a fixing device is provided below the stirring blade. The fixing device includes a first slider, a second slider, a groove, and a cover plate. Two first sliders are provided and are respectively fixedly connected to both sides of the first filter screen. A second slider is provided below the first filter screen and is respectively fixedly connected to both sides of the second filter screen. The outer walls of the first slider and the second slider are slidably engaged with the groove. The groove is opened below both sides of the inner wall of the water distribution tank. A cover plate is provided in front of the groove. The cover plate is engaged with the front of the outer wall of the water distribution tank by a hinge.

[0008] Preferably, the bottom of the water distribution tank is equidistantly connected with a plurality of nozzles, and a second tank is fixedly connected to the top of the base plate on the side away from the first tank below the nozzles. A connecting pipe connects the second tank and the first tank. A water pump is fixedly connected to the top of the second tank. The input end of the water pump is connected to a suction pipe, which passes through the second tank and extends into the interior of the second tank. The output end of the water pump is connected to an outlet pipe, and the other end of the outlet pipe passes through the first tank and is connected to the side of the water distribution tank away from the motor.

[0009] Preferably, an air intake pipe is connected to the side of the first box away from the second box. The air intake pipe passes through the first box and is fixedly connected to a dispersion box. A baffle fixedly connected to the top of the first box is provided above the exhaust port.

[0010] Preferably, a grid is provided above the dispersion box, and the two sides of the grid are respectively fixedly connected to the two sides of the inner wall of the first box. Water dividing plates are provided above and below the grid, and the two sides of the two water dividing plates are respectively fixedly connected to the two sides of the inner wall of the first box.

[0011] Beneficial effects

[0012] This utility model provides a boiler exhaust gas desulfurization device. It has the following beneficial effects: Through the cooperation of a water distribution tank, a first filter screen, a second filter screen, a motor, a connecting column, and stirring blades, this boiler exhaust gas desulfurization device achieves the effect that, during desulfurization, the motor drives the connecting column to rotate inside the water distribution tank, and the connecting column drives the stirring blades to stir the lime water inside the water distribution tank. This solves the problem in existing boiler exhaust gas desulfurization devices where undissolved lime particles in the lime water easily settle, leading to unstable lime water concentration and affecting desulfurization efficiency. Furthermore, settled lime particles may clog the nozzles of the desulfurization device, affecting its normal operation and increasing maintenance costs and downtime.

[0013] By coordinating the first slider, the second slider, the chute, and the cover plate, the first and second filter screens filter the lime water before desulfurizing the boiler exhaust gas. The first and second sliders replace the first and second filter screens, and the filtered lime water filters the boiler exhaust gas through the nozzle. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 for Figure 1 An exterior schematic diagram;

[0016] Figure 3 for Figure 1 Front view of the central water tank;

[0017] Figure 4 for Figure 3 A schematic diagram of the structure of the first filter, the second filter, and the nozzle;

[0018] Figure 5 for Figure 1 A schematic diagram of the structure of the connecting pipe, the second housing, and the water pump.

[0019] In the diagram: 1. Base plate; 2. First chamber; 3. Exhaust port; 4. Water distribution tank; 5. First filter screen; 6. Second filter screen; 7. Motor; 8. Connecting column; 9. Stirring blade; 10. First slider; 11. Second slider; 12. Slide groove; 13. Cover plate; 14. Nozzle; 15. Connecting pipe; 16. Second chamber; 17. Water pump; 18. Suction pipe; 19. Water outlet pipe; 20. Air inlet pipe; 21. Dispersion box; 22. Grille; 23. Water distribution plate; 24. Baffle. Detailed Implementation

[0020] 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.

[0021] When existing boiler flue gas desulfurization devices are in operation, lime water solvent may precipitate and separate into layers, which can then form scale inside pipes and spray nozzles, clogging them and affecting the normal operation of the boiler flue gas desulfurization device, increasing maintenance costs and downtime.

[0022] In view of this, the present invention provides a boiler exhaust gas desulfurization device. This device, through the cooperation of a water distribution tank, a motor, a connecting column, and a stirring blades, achieves the effect that when desulfurizing boiler exhaust gas, the motor drives the connecting column to rotate inside the water distribution tank, and the connecting column drives the stirring blades to stir the lime water inside the water distribution tank. This solves the problem that in existing boiler exhaust gas desulfurization devices, the lime water solvent may precipitate and separate during operation, leading to scale buildup inside pipes and spray nozzles, clogging them, and thus affecting the normal operation of the boiler exhaust gas desulfurization device, increasing maintenance costs and downtime.

[0023] 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.

[0024] Example 1, by Figure 1-5 It is understood that the boiler exhaust gas desulfurization device in this case includes a base plate 1, a first box 2 fixedly connected to the top of the base plate 1, an exhaust port 3 connected to the top of the first box 2, and a processing device below the exhaust port 3. The processing device includes a water distribution tank 4, a first filter screen 5, a second filter screen 6, a motor 7, a connecting column 8, and stirring blades 9. The water distribution tank 4 is fixedly connected to the top of the inner wall of the first box 2. The first filter screen 5 is provided below the inner wall of the water distribution tank 4. The second filter screen 6 is attached to the bottom of the first filter screen 5. A motor 7 is fixedly connected to the outer wall of the first box 2 on one side of the water distribution tank 4. The output end of the motor 7 passes through the first box 2 through a sealed bearing and is fixedly connected to the connecting column 8. The connecting column 8 passes through the outer wall of the water distribution tank 4 through a sealed bearing. Several stirring blades 9 are fixedly connected at equal intervals on the outer wall of the connecting column 8 located inside the water distribution tank 4.

[0025] In the specific implementation process, it is worth noting that the base plate 1 is made of cast iron or carbon steel to ensure that the base plate 1 can provide stable support for the boiler exhaust gas desulfurization device. The first box 2 is made of 316L stainless steel, which has excellent corrosion resistance and stability, ensuring that the first box 2 can meet the actual use conditions. The motor 7 is an MR series servo motor. Through the cooperation between the water distribution tank 4, the motor 7, the connecting column 8 and the stirring blade 9, the motor 7 drives the connecting column 8 to rotate, which in turn drives the stirring blade 9 to rotate. The stirring blade 9 stirs the lime water inside the water distribution tank 4. Through the cooperation between the first filter screen 5 and the second filter screen 6, larger undissolved particles in the lime water are intercepted and filtered. This can prevent the lime water from settling and stratifying, thus preventing the nozzle 14 from being blocked. Moreover, the filtered lime water is finer and can have more full contact with the boiler exhaust gas, increasing the reaction area.

[0026] Furthermore, a fixing device is provided below the stirring blade 9. The fixing device includes a first slider 10, a second slider 11, a chute 12, and a cover plate 13. There are two first sliders 10, which are fixedly connected to both sides of the first filter screen 5. Below the first filter screen 5, there are second sliders 11 that are fixedly connected to both sides of the second filter screen 6. The outer walls of the first slider 10 and the second slider 11 are slidably engaged with the chute 12. The chute 12 is opened below both sides of the inner wall of the water distribution tank 4. A cover plate 13 is provided in front of the chute 12. The cover plate 13 is connected to the front of the outer wall of the water distribution tank 4 by a hinge.

[0027] In the specific implementation process, it is worth noting that the front of the first box 2 is connected to a sealing door by a hinge. The staff can open the sealing door to inspect and clean the internal mechanism of the first box 2. The cover plate 13 is fixedly connected to a sealing strip on the side near the water distribution tank 4. The sealing strip seals the water distribution tank 4. The water distribution tank 4 and the cover plate 13 are fixedly connected by a locking device. The lime water inside the water distribution tank 4 is filtered by the first filter screen 5 and the second filter screen 6 to prevent the lime water from containing limestone lumps, which would block the pipes. Through the cooperation between the first slider 10, the second slider 11, the slide groove 12 and the cover plate 13, the staff first opens the cover plate 13 and takes out the first filter screen 5 and the second filter screen 6. The slide groove 12 limits the first slider 10 and the second slider 11, which facilitates the quick replacement of the first filter screen 5 and the second filter screen 6 and reduces the maintenance and replacement time of the first filter screen 5 and the second filter screen 6.

[0028] Furthermore, a number of nozzles 14 are equidistantly connected to the bottom of the water distribution tank 4. Below the nozzles 14, a second tank 16 is fixedly connected to the top of the base plate 1 on the side away from the first tank 2. A connecting pipe 15 connects the second tank 16 and the first tank 2. A water pump 17 is fixedly connected to the top of the second tank 16. The input end of the water pump 17 is connected to a suction pipe 18, which passes through the second tank 16 and extends into the interior of the second tank 16. The output end of the water pump 17 is connected to an outlet pipe 19, and the other end of the outlet pipe 19 passes through the first tank 2 and is connected to the side of the water distribution tank 4 away from the motor 7.

[0029] In the specific implementation process, it is worth noting that the nozzle 14 is a hollow cone nozzle, and the specific model is not limited, as long as it meets the technical solution described in this embodiment. The water pump 17 is an IS80 centrifugal pump to ensure that the water pump 17 can transport lime water. Through the cooperation between the nozzle 14, connecting pipe 15, second box 16, water pump 17, suction pipe 18 and outlet pipe 19, the water pump 17 first drives the suction pipe 18 to draw lime water from the second box 16, and enters the water distribution tank 4 through the outlet pipe 19. Then, the nozzle 14 sprays the boiler exhaust gas. After spraying, the lime water flows into the bottom of the first box 2 under the action of gravity, and enters the second box 16 through the connecting pipe 15. This is conducive to the recycling of lime water for spraying and avoids the waste of resources caused by the inability to recycle lime water.

[0030] Example 2, by Figure 1-5 It can be seen that the side of the first box 2 away from the second box 16 is connected to an air inlet pipe 20. The air inlet pipe 20 passes through the first box 2 and is fixedly connected to a dispersion box 21. A baffle 24 is provided above the dispersion box 21, and the bottom of the baffle 24 is fixedly connected to the top of the first box 2.

[0031] In the specific implementation process, it is worth noting that the baffle 24 is composed of a horizontal plate and a column. The column supports the horizontal plate. Through the cooperation between the air inlet pipe 20 and the dispersion box 21, the air inlet pipe 20 is first connected to the external boiler exhaust pipe. The boiler exhaust gas enters the interior of the dispersion box 21 through the air inlet pipe 20. Several ventilation holes are opened on the outer wall of the dispersion box 21. The boiler exhaust gas leaves the dispersion box 21 through the ventilation holes and enters the lime water inside the first box 2. The lime water removes dust and desulfurizes the boiler exhaust gas. The baffle 24 can prevent external debris from entering the interior of the first box 2 through the exhaust port 3.

[0032] Furthermore, a grid 22 is provided above the dispersion box 21, and the two sides of the grid 22 are fixedly connected to the two sides of the inner wall of the first box 2 respectively. A water dividing plate 23 is provided above and below the grid 22, and the two sides of the two water dividing plates 23 are fixedly connected to the two sides of the inner wall of the first box 2 respectively.

[0033] In the specific implementation process, it is worth noting that the water distribution plate 23 is made of stainless steel plate with round holes on the surface of the stainless steel plate, and the surface of the grid 22 is coated with ceramic coating, which has strong corrosion resistance and oxidation resistance. Through the cooperation between the grid 22 and the water distribution plate 23, the contact area between lime water and boiler exhaust gas can be increased, so that the boiler exhaust gas is evenly distributed inside the first box 2. This is conducive to the full reaction between lime water and boiler exhaust gas, thereby improving the desulfurization effect of boiler exhaust gas.

[0034] Specifically, when desulfurizing boiler exhaust gas, the staff first connects the inlet pipe 20 to the external boiler exhaust gas discharge pipe. Part of the boiler exhaust gas reacts with lime water, and the remaining gas rises. The water pump 17 drives the lime water inside the second chamber 16 to replenish the water distribution tank 4 through the outlet pipe 19. The stirring blade 9 stirs the lime water in the water distribution tank 4. The stirred lime water enters the nozzle 14 through the first filter screen 5 and the second filter screen 6. The exhaust gas reacts fully with the lime water through the grid 22 and the water distribution plate 23. The nozzle 14 sprays the rising boiler exhaust gas. The desulfurized gas is discharged to the outside of the first chamber 2 through the exhaust port 3.

[0035] 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 boiler exhaust gas desulfurization device, comprising a base plate (1), characterized in that: The top of the base plate (1) is fixedly connected to a first box (2), the top of the first box (2) is connected to an exhaust port (3), and a processing device is provided below the exhaust port (3). The treatment device includes a water distribution tank (4), a first filter screen (5), a second filter screen (6), a motor (7), a connecting column (8), and a stirring blade (9); The water distribution tank (4) is fixedly connected to the top of the inner wall of the first tank (2). A first filter screen (5) is provided below the inner wall of the water distribution tank (4). A second filter screen (6) is attached to the bottom of the first filter screen (5). A motor (7) is fixedly connected to the outer wall of the first tank (2) on one side of the water distribution tank (4). The output end of the motor (7) passes through the first tank (2) through a sealed bearing and is fixedly connected to a connecting column (8). The connecting column (8) passes through the outer wall of the water distribution tank (4) through a sealed bearing. Several stirring blades (9) are fixedly connected at equal intervals on one side of the outer wall of the connecting column (8) inside the water distribution tank (4).

2. The boiler exhaust gas desulfurization device according to claim 1, characterized in that: A fixing device is provided below the stirring blade (9); The fixing device includes a first slider (10), a second slider (11), a groove (12), and a cover plate (13); Two first sliders (10) are provided and are fixedly connected to both sides of the first filter screen (5). A second slider (11) is provided below the first filter screen (5) and is fixedly connected to both sides of the second filter screen (6). The outer walls of the first slider (10) and the second slider (11) are slidably engaged with a groove (12). The groove (12) is opened on the lower side of both sides of the inner wall of the water distribution tank (4). A cover plate (13) is provided in front of the groove (12). The cover plate (13) is engaged with the front of the outer wall of the water distribution tank (4) by a hinge.

3. The boiler exhaust gas desulfurization device according to claim 1, characterized in that: The bottom of the water distribution tank (4) is connected to several nozzles (14) at equal intervals. Below the nozzles (14) is a second tank (16) fixedly connected to the top of the base plate (1) on the side away from the first tank (2). A connecting pipe (15) connects the second tank (16) and the first tank (2). A water pump (17) is fixedly connected to the top of the second tank (16). The input end of the water pump (17) is connected to a suction pipe (18). The suction pipe (18) passes through the second tank (16) and extends into the interior of the second tank (16). The output end of the water pump (17) is connected to a water outlet pipe (19). The other end of the water outlet pipe (19) passes through the first tank (2) and is connected to the side of the water distribution tank (4) away from the motor (7).

4. A boiler exhaust gas desulfurization device according to claim 3, characterized in that: An air inlet pipe (20) is connected to the side of the first box (2) away from the second box (16). The air inlet pipe (20) passes through the first box (2) and is fixedly connected to a dispersion box (21). A baffle (24) is fixedly connected to the top of the first box (2) above the exhaust port (3).

5. A boiler exhaust gas desulfurization device according to claim 4, characterized in that: A grid (22) is provided above the dispersion box (21). The two sides of the grid (22) are fixedly connected to the inner walls of the first box (2). Water dividing plates (23) are provided above and below the grid (22). The two sides of the two water dividing plates (23) are fixedly connected to the inner walls of the first box (2).

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