Wet dust removal system

Abstract

The utility model discloses a wet dust removal system, including the dust collection and removal system, exhaust system and blowdown system, dust collection and removal system includes dust collection pipe, dust outlet pipe, spraying device and dust collection mixing drum, the inlet of dust collection pipe is communicated with the upside of dust collection mixing drum, the dust outlet pipe is communicated with the downside of dust collection mixing drum, exhaust system includes processing drum, the processing drum is equipped with the spray device. A main fan is arranged at the upper part of the treatment cylinder, a demisting device is arranged in the treatment cylinder, a drain outlet is formed in the lower part of the treatment cylinder, the dust outlet pipe is connected with the lower part of the treatment cylinder after being obliquely arranged relative to the horizontal plane, and the drain outlet is connected with a sewage treatment tank of a sewage discharge system; dust-containing waste gas is effectively mixed at a high speed for multiple times, so that the dust removal efficiency and effect are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of dust collectors, and particularly relates to a wet dust removal system. Background Art

[0002] With the development of the economic society, dust removal technology has been widely applied to the production and life of all walks of life. However, in industries such as metallurgical smelting and mining, due to low dust removal efficiency and poor effect, and often increasing the power of the dust collector to improve the dust removal effect, the dust removal mechanism is huge, covering a large area, with large investment, while the dust removal effect has not been significantly improved. Summary of the Invention

[0003] To improve the dust removal effect, the utility model adopts the following technical scheme: a wet dust removal system, including a dust collection system, an exhaust system and a sewage discharge system. The dust collection system includes a dust collection mixing cylinder. One end of a dust collection pipe is connected to the upper part of the dust collection mixing cylinder, and the lower part of the dust collection mixing cylinder is connected to a dust outlet pipe. A spraying device is arranged inside the dust collection mixing cylinder. The exhaust system includes a treatment cylinder. A main fan is arranged in the upper part of the treatment cylinder. A demisting device is arranged inside the treatment cylinder. A sewage discharge port is arranged in the lower part of the treatment cylinder. The dust outlet pipe is obliquely arranged and then connected to the lower part of the treatment cylinder. The sewage discharge port is connected to a sewage treatment pool of the sewage discharge system.

[0004] Further, a cyclone separator is arranged above the sewage discharge port to pre-separate large dust particles containing water and directly enter the sewage treatment pool for the first demisting.

[0005] Further, an air inlet and an air outlet are arranged on the cylinder body of the dust collection mixing cylinder. The air inlet is connected to the dust collection pipe. A flow dividing device and a mixing pipe are arranged inside the dust collection mixing cylinder. The mixing pipe is arranged below the flow dividing device. The dust inlet end of the mixing pipe close to the flow dividing device is in a flared shape. The length of the mixing pipe is not less than three times the diameter of the mixing pipe. The central lines of the air inlet, the flow dividing device and the mixing pipe coincide with the central line of the cylinder body of the dust collection mixing cylinder. The spraying device includes a spray head and connected pipelines and a water pump. The spray head is arranged on the central line above the flow dividing device. The spraying direction of the spray head is the same as the air direction of the incoming dust. The air outlet is connected to the dust outlet pipe.

[0006] Further, one end of the dust collection pipe is connected to the air inlet, and the other end is connected with a flared dust suction hood.

[0007] Further, an air outlet pipe is also arranged. The air outlet pipe is connected to the air outlet of the main fan. The air volume introduced by the air outlet pipe is not more than 80% of the air volume of the main fan outlet. The air outlet pipe is provided with a plurality of outlets, and all the outlets extend into the dust suction hood.

[0008] Furthermore, the dust collection pipes are symmetrically and evenly distributed on the outer side of the dust collection and mixing cylinder body, and their outlets all extend into the dust suction hood. The even distribution can improve the uniformity and efficiency of the air in the dust suction hood, resulting in better dust removal effect.

[0009] Furthermore, the mixing pipe is connected to the dust collection and mixing cylinder body through a partition plate. One end of the partition plate is fixedly connected to the dust collection and mixing cylinder body, and the other end is provided with an arc connected to the mixing pipe. The mixing pipe is connected to the outer tangent of the arc to form a flared dust inlet port, and the diameter of the arc is 0.1 - 0.4 times the diameter of the mixing pipe.

[0010] Furthermore, the flow splitting device is arranged in an umbrella shape and includes an umbrella plate and a bracket, and the bracket is connected to the dust collection and mixing cylinder body.

[0011] Furthermore, the flow splitting device includes an inclined plate, a water receiving tank and a mounting frame, and the mounting frame is fixedly connected to the dust collection and mixing cylinder body.

[0012] Furthermore, a static mixer is arranged in the mixing pipe. The static mixer is n non-axis helices, where n is an integer not less than 1, and the helix lead is the same as the diameter. The angle between adjacent ones of the n helices is 180° / n, and the length of the static mixer is not greater than 0.5 times the length of the mixing pipe; for larger-sized mixing pipes, the static mixer can also be arranged as an axis helical blade to increase strength.

[0013] Furthermore, a baffle groove is arranged in the dust collection and mixing cylinder body. The baffle groove is arranged below the mixing pipe, and multiple rows of through holes are evenly arranged on the bottom plate and the peripheral baffle of the baffle groove.

[0014] Furthermore, a fan and a driving motor are arranged in the mixing pipe. The driving motor drives the fan through a transmission shaft, and the other end of the transmission shaft is connected to the flow splitting device to drive the flow splitting device and the fan to rotate simultaneously.

[0015] Furthermore, the demisting device is a rotary demisting disc. The rotary demisting disc is connected to one end of the driving shaft of the main fan and rotates simultaneously with the main fan, which is beneficial for the driving power of the main fan to drive the rotary demisting disc to rotate for secondary demisting. It is not only energy-saving but also has a better demisting effect than ordinary static demisting.

[0016] Furthermore, an exhaust fan is arranged near the dust outlet.

[0017] Beneficial effects

[0018] 1. Set up an air outlet pipe to rationally utilize the air outlet of the main fan. The outlet at the other end of the air outlet pipe extends into the dust suction hood, introducing the clean air after demisting into the dust suction hood, increasing the flow rate of the dust-containing air in the dust suction hood, and improving the dust removal efficiency and effect.

[0019] 2. Align the dust inlet, the shunt device with the central axis of the dust collection mixing cylinder body, making the mixing of the dust airflow and water mist in the dust collection mixing cylinder body more uniform, ensuring the uniformity of the dust removal effect. The dust inlet port of the mixing pipe is set in a flared shape, which can effectively reduce the intake resistance, make the air containing dust and water flow faster, improve the dust removal efficiency, and moreover, the mud deposited on the partition plate at the dust inlet port forms a flowing cofferdam, reducing the generation of eddy currents and further improving the dust removal effect.

[0020] 3. The shunt device is set in an umbrella shape and cooperates with the sprinkler head to spray, forming a "water curtain" under the umbrella plate, enabling the dust-containing waste gas to mix better with water. Moreover, the spraying direction of the sprinkler head is the same as the direction of the incoming dust-containing air, accelerating the flow of the dust-containing waste gas, thereby improving the dust removal efficiency and effect. And, under the action of the water mist and negative pressure air, a turbulent flow area will be formed under the umbrella plate for the dust-containing waste gas and water mist. Because the flow rate is large enough, the streamline is no longer clearly distinguishable, and there are many small vortices in the flow field. There is not only sliding but also mixing between adjacent flow layers, accelerating the flow of the dust-containing waste gas and the combination area and efficiency with the water mist.

[0021] 4. When the shunt device is provided with a water receiving tank, the dust-containing and water-containing air partially changes its original movement trajectory and speed, thereby creating a speed difference between the dust-containing waste gas and water, and combining again, prolonging the combination time and improving the dust removal effect.

[0022] 5. Set up a static mixer in the mixing pipe, enabling the dust-containing waste gas and water mist to be turbulently stirred in the mixing pipe, changing the travel direction trajectory multiple times, making the combination of dust and water more sufficient, and multiple spirals can be set according to actual needs. When the spiral lead is the same as the diameter, it can improve the mixing effect of water and dust.

[0023] 6. Set up a retaining groove below the mixing pipe, changing the direction of the dust-containing wastewater, increasing the mixing effect again, improving the dust removal cleanliness, and also playing a role in decompression, slowing down the pressure of the pressurized dust-containing sewage and protecting the life and reliability of the device.

[0024] 7. Set up a rotating demister disk connected to one end of the drive shaft of the main fan and rotating simultaneously with the main fan. Utilize the driving power of the main fan to drive the rotating demister disk to rotate for secondary dynamic demisting. It is not only energy-saving but also has a better demisting effect than ordinary static demisting.

[0025] 8. An induced draft fan is provided at the dust outlet of the dust collection mixing cylinder. Moving the dust removal step forward can improve efficiency, reduce the workload of the main fan, and lower the power of the main fan.

[0026] In summary, the utility model enables the dust-containing waste gas to be effectively mixed with water multiple times inside the dust collection mixing cylinder, greatly improving the dust removal efficiency and effect. Moreover, by introducing the air outlet of the main fan, the dust fluidity inside the dust suction hood is improved, eliminating the need for a large dust removal mechanism, thus saving floor space and equipment investment. Description of the Drawings

[0027] Appendix Figure 1 、 3 Figures 5 and 6 are schematic structural diagrams provided in Embodiment 1 of the present application;

[0028] Appendix Figure 2 is a schematic structural diagram provided in Embodiment 2 of the present application;

[0029] Appendix Figure 4 is a schematic structural diagram of a dust collection pipe provided in Embodiment 3 of the present application;

[0030] Appendix Figure 7 is a schematic structural diagram of a flow splitting device provided in an embodiment of the present application;

[0031] Appendix Figure 8 is a schematic structural diagram of a mixing pipe provided in an embodiment of the present application;

[0032] Appendix Figure 9 is a schematic structural diagram of a retaining groove provided in an embodiment of the present application;

[0033] Appendix Figure 10 、 11 Figures 11 and 12 are schematic structural diagrams provided in Embodiment 8 of the present application;

[0034] Appendix Figure 13 is a schematic structural diagram provided in Embodiment 9 of the present application;

[0035] Appendix Figure 14 is a schematic structural diagram provided in Embodiment 10 of the present application;

[0036] The descriptions of the reference numerals are as follows:

[0037] 1. Dust collection and removal system; 11. Dust collection pipe; 12. Dust outlet pipe; 13. Spraying device; 131. Nozzle; 14. Dust collection mixing cylinder; 141. Dust inlet; 142. Dust outlet; 143. Diverting device; 1431. Umbrella plate; 1432. Bracket; 1433. Inclined plate; 1434. Water receiving tank; 1435. Mounting frame; 144. Mixing pipe; 1441. Dust inlet port; 1442. Static mixer; 145. Partition board; 146. Retaining groove; 15. Dust suction hood; 2. Exhaust system; 21. Treatment cylinder; 211. Exhaust pipe; 22. Main fan; 23. Demisting device; 24. Drainage port; 25. Sound-absorbing cotton; 26. Rotating demisting disk; 3. Drainage system;

[0038] 31. Sewage treatment tank; 4. Cyclone separator; 5. Exhaust fan; 6. Fan; 7. Motor; 71. Transmission shaft. Specific implementation mode

[0039] Embodiment 1

[0040] As Figure 1 、As Figure 3 、 Figure 5 、 Figure 6 As shown in the figure: A wet dust removal system includes a dust collection and removal system 1, an exhaust system 2 and a drainage system 3. The dust collection and removal system includes a dust collection pipe 11, a dust outlet pipe 12, a spraying device 13 and a dust collection mixing cylinder 14. The spraying device 13 includes a nozzle 131 and a water pump and a water pipe connected thereto. The inlet of the dust collection pipe 11 is connected to the upper part of the dust collection mixing cylinder 14, and the dust outlet pipe 12 is connected to the lower part of the dust collection mixing cylinder 14. The exhaust system 2 includes a treatment cylinder 21. A main fan 22 is arranged on the upper part of the treatment cylinder 21. A demisting device 23 is arranged in the treatment cylinder 21. The demisting device uses general technologies such as a cyclone demister or a turbulent flow demister for demisting, and the structure will not be elaborated. Sound-absorbing cotton 25 is arranged at the connection between the main fan 22 and the inner wall of the treatment cylinder 21 to isolate the noise of the fan. A drainage port 24 is arranged at the lower part of the treatment cylinder 21. The dust outlet pipe 12 is arranged obliquely with respect to the horizontal plane and then connected to the lower part of the treatment cylinder 21. The drainage port 24 is connected to the sewage treatment tank 31.

[0041] A cyclone separator 4 is arranged above the drainage port 24. As Figure 3 shown in the figure, the dust-containing waste gas mixed with water mist enters the cyclone separator 4 from the dust outlet pipe 12, and the large dust particles containing water are separated. The sewage carrying dust directly enters the sewage treatment tank 31 for the first demisting.

[0042] As Figure 5In the figures shown, the large arrows represent the movement direction trajectory of the dusty waste gas, and the small arrows represent the movement trajectory of the water mist. An air inlet 141 and an air outlet 142 are provided on the dust collection mixing cylinder 14. A flow dividing device 143 and a mixing pipe 144 are arranged inside the dust collection mixing cylinder 14. The mixing pipe 144 is arranged below the flow dividing device 143. The dust inlet port 1441 of the mixing pipe 144 near the flow dividing device 143 is in a flared shape. The length of the mixing pipe 144 is not less than three times the diameter of the mixing pipe 144. The length of the mixing pipe 144 should not be less than 3 times the diameter of the mixing pipe, otherwise it will affect the mixing effect of the dusty waste gas. The central axes of the air inlet 141, the flow dividing device 143, and the mixing pipe 144 coincide with the central axis of the dust collection mixing cylinder 14, making the mixing of the air flow and the water mist in the dust collection mixing cylinder 14 more uniform and improving the uniformity of the dust removal effect. A spraying device 13 is arranged above the flow dividing device 143. The spraying device 13 includes a spray head 131. The spraying direction of the spray head 131 is the same as the air inlet direction of the dust. The spray head 131 is externally connected to a water pump through a pipeline. The air outlet 142 is arranged at the bottom of the dust collection mixing cylinder 14 and is connected to an air outlet pipe 12. The air outlet pipe 12 is set at a certain slope with the horizontal plane to facilitate the flow of the sludge deposited at the bottom. The dust inlet port 1441 of the mixing pipe 144 is set in a flared shape, which can reduce the intake resistance, make the flow of the dusty and water-containing waste gas faster, improve the dust removal efficiency, and form a circular flow cofferdam at the dust inlet port, reducing the generation of eddy currents and improving the dust removal effect.

[0043] Further, the mixing pipe 144 is connected to the cylinder body of the dust collection mixing cylinder 14 through a partition plate 145. One end of the partition plate 145 is fixedly connected to the inner wall of the cylinder body of the dust collection mixing cylinder 14. The fixed connection is by welding or riveting. The other end is set in an arc shape. The mixing pipe 144 is connected to the outer tangent of the arc to form a flared dust inlet port 1441. The diameter of the arc is 0.1 - 0.4 times the diameter of the mixing pipe. The setting of the arc-shaped flared dust inlet port 1441 can reduce the intake resistance of the air entering the mixing pipe 144, make the flow of the dusty and water-containing waste gas faster. The waste gas mixed with water drives the deposited mud on the partition plate to flow together along the outer edge of the arc-shaped flared dust inlet port 1441, forming a circular area, making the deposited mud flow quickly into the mixing pipe and fall to the bottom of the dust collection mixing cylinder 14. As shown by the large arrows in the figure representing the movement direction trajectory of the dusty waste gas, it improves the dust removal efficiency, and forms a flowing cofferdam at the dust inlet port, reducing the generation of eddy currents. Holes can also be opened on the partition plate 145 according to the amount of deposited mud as Figure 6 shown, making the deposited mud flow faster.

[0044] Further, on the basis of the above embodiment, as Figure 3 shown, one end of the dust collection pipe 11 is connected to the air inlet 141, and the other end is connected to a flared dust suction hood 15.

[0045] Embodiment 2

[0046] Further, on the basis of the above embodiments, as Figure 2 shown: The air outlet pipe 211 is connected to the air outlet of the main fan 22. The air volume introduced by the air outlet pipe 211 is not greater than 80% of the air volume discharged by the main fan 22. The air outlet pipe 211 can be provided with multiple outlets, and all the outlets extend into the dust suction hood 15, improving the uniformity and efficiency of the air in the dust suction hood, introducing the clean air after demisting into the dust suction hood, increasing the flow rate of the dust-containing air in the dust suction hood, improving the fluidity and thus improving the working efficiency.

[0047] Embodiment 3

[0048] Further, on the basis of the above embodiments, as Figure 4 shown: The dust collection pipes 11 are evenly arranged on the outer side of the cylinder body of the dust collection mixing cylinder 14 and share a dust suction hood 15, making the structure more compact and having good air inlet uniformity. Multiple dust collection pipes 11 can be arranged.

[0049] Embodiment 4

[0050] Further, on the basis of the above embodiments, the shunt device 143 is set to be umbrella-shaped, including an umbrella plate 1431 and a bracket 1432. The bracket 1432 is fixedly connected to the inner wall of the cylinder body of the dust collection mixing cylinder 14. A spray head 131 is provided above the shunt device 143. The spraying direction of the spray head 131 is the same as the direction of the incoming dusty air. The umbrella-shaped shunt device 143 cooperates with the spray head 131 to form a "water curtain" under the umbrella plate 1431, as shown by the dotted line under the umbrella plate 1431 in the figure, enabling the dusty waste gas to better mix with the water mist. Moreover, the spraying direction of the spray head 131 is the same as the flowing direction of the incoming dusty air, accelerating the flow of the dusty waste gas, and thus improving the dust removal efficiency and effect. At the same time, under the combined action of the water mist and the negative-pressure air, as shown by the small arrows in the figure, part of the water mist and the dusty waste gas will form a turbulent flow region under the umbrella plate 1431. Because the flow rate is large enough, the streamline is no longer clearly distinguishable, and there are many small vortices in the flow field. There is not only sliding but also mixing between adjacent flow layers, accelerating the flow of the dusty waste gas and the combination area and efficiency with the water mist.

[0051] Embodiment 5

[0052] Further, different from Embodiment 4, as Figure 7 shown: The shunt device 143 includes an inclined plate 1433, a water receiving tank 1434 and a mounting frame 1435. The mounting frame 1435 is fixedly connected to the inner wall of the cylinder body of the dust collection mixing cylinder 14. A water receiving tank is first arranged below the spray head 131, so that the dusty and water-containing air partially changes its original movement trajectory and speed, thereby creating a speed difference between the dusty waste gas and the water mist, making the flow rate faster, and enabling the dust to combine with the water mist again, further improving the dust removal effect.

[0053] Example 6

[0054] Further, on the basis of the above embodiments, as Figure 8 shown: A static mixer 1442 is provided in the mixing pipe 144. The static mixer 1442 can be provided with at least one set of spiral blades according to needs, and the spiral lead is the same as the diameter; multiple sets can also be provided, which can make the dust and the water-containing waste gas change the traveling direction trajectory multiple times, so that the dust and water are combined more fully. When 3 sets of spirals are provided, the adjacent angle is 60°. The static mixer 1442 should not be filled with the entire length of the mixing pipe 144, and its length reaching 0.3 - 0.5 times the length of the mixing pipe 144 is sufficient. The spiral blades can be fixedly connected to the inner wall of the mixing pipe 144; for a mixing pipe 144 with a larger size, the static mixer 1442 can also be set as a shafted spiral blade to increase the strength.

[0055] Example 7

[0056] Further, on the basis of the above embodiments, as Figure 5 、 Figure 9 shown, a retaining groove 146 is provided in the dust collection mixing cylinder 14. The retaining groove 146 is provided below the mixing pipe 144. The retaining groove 146 can be fixedly connected to the mixing pipe 144 or to the dust collection mixing cylinder 14. Multiple rows of through holes are evenly provided on the bottom plate and the surrounding baffle of the retaining groove 146, and the size of the holes can be set according to the actual working conditions to facilitate the passage of the dust-containing sewage; the setting of the retaining groove 146 changes the original trajectory direction of the dust-containing wastewater, increases the mixing effect, improves the dust removal cleanliness, and also plays a role in pressure reduction, reducing the pressure of the pressurized dust-containing sewage and waste gas, improving the reliability of the device, and extending the service life.

[0057] Example 8

[0058] Further, on the basis of the above embodiments, as Figure 10 、 Figure 11 、 Figure 12 shown, the demisting device is a rotating demisting disk 26. One end of the extended drive shaft of the main fan 22 is fixedly connected to the rotating demisting disk 26. The drive device of the main fan 22 drives the main fan 22 and the rotating demisting disk 26 to rotate simultaneously. When the rotating demisting disk 26 rotates, the large-particle water-containing dust is thrown to a position far from the center of the drive shaft and flows down along the inner wall of the treatment cylinder 21, which is more efficient and effective than static demisting. Different usage scenarios can be used in combination with static demisting as Figure 12 shown.

[0059] Example 9

[0060] Further, as Figure 13As shown in the figure, a blower 6 and a driving motor 7 are arranged in the mixing pipe. The driving motor 7 drives the blower 6 through a transmission shaft 71. The other end of the transmission shaft 71 is connected to a flow dividing device 143, driving the flow dividing device 143 to rotate simultaneously with the blower 6, which not only saves energy but also improves the dust removal effect. When the flow dividing device 143 rotates, the speed of the water mist can be increased. The dust collection mixing cylinder 14 can be set as a cylinder, and the dust inlet 141 is arranged above the side of the dust collection mixing cylinder 14. The dust entering the dust collection mixing cylinder 14 generates a cyclone effect under negative pressure.

[0061] Embodiment 10

[0062] Further, on the basis of the above embodiment, as Figure 14 shown, an exhaust fan 5 is arranged near the dust outlet 142 to increase the dust removal efficiency and effectively reduce the power of the main fan 22.

[0063] The dust treatment route of this application is as follows: First, the dust is sucked into the dust collection mixing cylinder 14 through the dust suction hood 15. The water-containing dust after multiple mixings in the dust collection mixing cylinder 14 first enters the lower part of the exhaust system 2 through the dust outlet pipe 12, and is initially subjected to fog separation by the cyclone separator 4. The larger-particle water-containing dust falls into the sewage treatment pool 31, and the remaining water-containing dust enters the demisting device 23. Then, a part of the clean air is discharged into the atmosphere, and a part is introduced into the dust suction hood 15 through the air outlet pipe 211, increasing the flow rate of the dust-containing air in the dust suction hood 15.

[0064] The advantages of this application are as follows: First, the air outlet of the main fan 22 is connected to the air outlet pipe 211, and the air output of the main fan 22 is utilized. The air volume introduced by the air outlet pipe 211 is not greater than 80% of the air output of the main fan 22. The outlet at the other end of the air outlet pipe 211 extends into the dust suction hood 15, introducing the clean air after demisting into the dust suction hood 15, increasing the flow rate of the dust-containing air in the dust suction hood 15. Second, the center lines of the dust inlet 141 and the flow dividing device 143 respectively coincide with the center line of the dust collection mixing cylinder 14, making the mixing of the airflow and the water mist in the dust collection mixing cylinder 14 more uniform, ensuring the uniformity of mixing, and improving the dust removal effect. The dust inlet port 1441 of the mixing pipe 144 is set in a horn shape, which can reduce the intake resistance, make the flow of the dust-containing and water-containing air faster, improve the dust removal efficiency, and form a flow retaining weir at the dust inlet port 1441, reducing the generation of eddy currents and further improving the dust removal effect;

[0065] The shunt device 143 is set in an umbrella shape and cooperates with the spray head 131 to form a "water curtain" under the umbrella plate 1431, enabling the dust-containing waste gas to better mix with water. Moreover, the spraying direction of the spray head 131 is the same as the air flow direction of the incoming dust, accelerating the flow of the dust-containing waste gas and further improving the dust removal efficiency and effect. At the same time, under the action of the water mist and negative-pressure air, a turbulent flow is formed between the dust-containing waste gas and the water mist under the umbrella plate 1431. Because the flow rate is large enough, the streamline is no longer clearly distinguishable, and there are many small vortices in the flow field. There is not only sliding but also mixing between adjacent flow layers, accelerating the flow of the dust-containing waste gas and its combination with the water mist;

[0066] When the shunt device 143 is provided with a water receiving tank 1434, it changes the original movement trajectory of part of the dust-containing and water-containing air, forming a velocity difference, thereby enabling the dust-containing waste gas to combine with water again, prolonging the mixing time, and improving the dust removal effect;

[0067] A static mixer 1442 is arranged in the mixing pipe 144 to conduct chaotic stirring of the sewage combined with the dust-containing waste gas in the mixing pipe 144. During the stirring process, the dust-containing waste gas changes its traveling direction multiple times, enabling the dust to combine with water more fully. Moreover, multiple spirals can be set according to actual needs. When the spiral lead is the same as the diameter, it can better improve the mixing effect of water and dust;

[0068] A retaining groove 146 is arranged below the mixing pipe 144, which changes the direction of the dust-containing waste water, improves the mixing effect, enhances the dust removal cleanliness, and also plays a role in pressure reduction, reducing the pressure of the pressurized dust-containing sewage, improving the reliability of the device, and extending the service life;

[0069] In summary, in the present utility model, the dust-containing waste gas first passes through the "water curtain" formed by the shunt device 143 to effectively mix the dust-containing waste gas with the water mist for the first time, and then passes through the "turbulent flow" area formed by the umbrella plate 1431 under the shunt device 143 to effectively mix for the second time. At the bell mouth of the mixing pipe 144, it is mixed for the third time through the arc-shaped bell mouth, and is mixed for the fourth time through the static mixer 1442 in the mixing pipe 144, and is mixed for the fifth time at the retaining groove 146. Through multiple high-speed and effective mixings, the dust removal effect is improved. The water-containing dust after multiple mixings first enters the lower part of the exhaust system 2 through the dust outlet pipe 12, and is initially defogged and separated by the cyclone separator 4. The larger-particle water-containing dust falls into the sewage treatment tank 31, and the remaining water-containing dust enters the defogging device 23. Part of the clean air is discharged into the atmosphere, and part is introduced into the dust suction hood 15 through the air outlet pipe 211. Introducing the clean air after defogging into the dust suction hood 15 increases the flow rate of the dust-containing air in the dust suction hood 15.

Claims

1. A wet dust removal system, characterized in that: It includes a dust collection and removal system, an exhaust system and a sewage discharge system. The dust collection and removal system includes a dust collection mixing cylinder. The upper part of the dust collection mixing cylinder is connected to one end of the dust collection pipe, and the lower part of the dust collection mixing cylinder is connected to the dust outlet pipe. A spray device is arranged in the dust collection mixing cylinder. The exhaust system includes a treatment cylinder. A main fan is arranged on the upper part of the treatment cylinder. A defogger is arranged in the treatment cylinder. A sewage discharge port is arranged at the lower part of the treatment cylinder. The dust outlet pipe is connected to the lower part of the treatment cylinder after being inclined. The sewage discharge port is connected to the sewage treatment tank of the sewage discharge system.

2. A wet dust removal system according to claim 1, characterized in that: A cyclone separator is arranged above the sewage outlet.

3. A wet dust removal system according to claim 2, characterized in that: The dust collecting and mixing cylinder body is provided with a dust inlet and a dust outlet, the dust inlet is connected to the dust collecting pipe, a diverter device and a mixing tube are provided in the dust collecting and mixing cylinder body, the mixing tube is arranged below the diverter device, the dust inlet port of the mixing tube close to the diverter device is trumpet-shaped, the length of the mixing tube is not less than three times the diameter of the mixing tube, the center lines of the dust inlet, the diverter device and the mixing tube all coincide with the center line of the cylinder body, the spraying device includes a nozzle and a connected pipe and a water pump, the nozzle is arranged on the upper center line of the diverter device, the spray direction of the nozzle is the same as the air direction of the dust inlet, and the dust outlet is connected to the dust outlet pipe.

4. A wet dust removal system according to claim 3, characterized in that: One end of the dust collecting pipe is connected to the dust inlet, and the other end is connected to a trumpet-shaped dust collecting hood.

5. A wet dust removal system according to claim 4, characterized in that: An air outlet pipe is also provided, which is connected to the air outlet of the main fan. The air volume introduced by the air outlet pipe is no more than 80% of the air volume of the main fan. The air outlet pipe is provided with multiple outlets, and the outlets all extend into the dust hood.

6. A wet dust removal system according to claim 4, characterized in that: The dust collecting pipes are evenly arranged on the outside of the dust collecting mixing barrel body and the outlets thereof all extend into the dust collecting hood.

7. A wet dust removal system according to claim 3, characterized in that: The mixing tube is connected to the dust collecting mixing tube body through a partition, one end of the partition is fixedly connected to the dust collecting mixing tube body, and the other end is arranged as an arc connected to the mixing tube, the mixing tube is connected to the outer tangent of the arc to form a trumpet-shaped dust inlet port, and the diameter of the arc is 0.1-0.4 times the diameter of the mixing tube.

8. A wet dust removal system according to claim 3, characterized in that: The diversion device is configured in an umbrella shape, including an umbrella plate and a bracket, and the bracket is connected to the cylinder.

9. A wet dust removal system according to claim 3, characterized in that: The flow dividing device comprises an inclined plate, a water receiving trough and a mounting frame.

10. A wet dust removal system according to claim 8 or 9, characterized in that: The mixing tube is provided with a static mixer, which is n shaftless spirals, where n is an integer not less than 1, and the spiral lead is the same as the diameter, and the length of the static mixer is not greater than 0.5 times the length of the mixing tube.

11. A wet dust removal system according to claim 3, characterized in that: A retaining groove is arranged in the dust collecting mixing cylinder, and the retaining groove is arranged below the mixing tube. A plurality of rows of through holes are evenly arranged on the bottom plate and the peripheral baffles of the retaining groove.

12. A wet dust removal system according to claim 3, characterized in that: The mixing tube is provided with a fan and a driving motor, the driving motor drives the fan through a transmission shaft, and the other end of the transmission shaft is connected to the diverter device to drive the diverter device and the fan to rotate simultaneously.

13. A wet dust removal system according to claim 1, characterized in that: The demisting device is a rotating demisting disk, which is connected to one end of the driving shaft of the main fan and rotates simultaneously with the main fan.

14. A wet dust removal system according to claim 3, characterized in that: An exhaust fan is arranged near the dust outlet.

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