Wet dust removal system

Abstract

The invention discloses a wet dust removal system, which comprises a dust collection and removal system, an exhaust system and a blowdown system, the dust collection and removal system comprises a dust collection pipe, a dust outlet pipe, a spraying device and a dust collection mixing cylinder, an inlet of the dust collection pipe is communicated with the upper part of the dust collection mixing cylinder, the dust outlet pipe is communicated with the lower part of the dust collection mixing cylinder, and the exhaust system comprises a treatment cylinder. 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 present application relates to the technical field of dust removal, in particular to a wet dust removal system. BACKGROUND

[0002] With the development of economic society, dust removal technology is widely applied to the production and life of various industries, but for some dust pollution is more serious and large area of unorganized emission of dust, such as metallurgical smelting, mining and other industries, due to low dust removal efficiency, poor effect, and often increase the power of dust removal to improve the dust removal effect, resulting in large dust removal mechanism, large area, large investment, and the dust removal effect is not significantly improved. SUMMARY

[0003] In order to improve the dust removal effect, the present application adopts the following technical scheme: a wet dust removal system, comprising a dust collection system, an exhaust system and a sewage system, the dust collection system comprising a dust collection mixing cylinder, the upper part of the dust collection mixing cylinder being connected with one end of a dust collection pipe, the lower part of the dust collection mixing cylinder being connected with a dust outlet pipe, a spraying device being arranged in the dust collection mixing cylinder, the exhaust system comprising a treatment cylinder, a main fan being arranged on the upper part of the treatment cylinder, a demisting device being arranged in the treatment cylinder, a sewage outlet being arranged on the lower part of the treatment cylinder, the dust outlet pipe being connected with the lower part of the treatment cylinder after being arranged obliquely, and the sewage outlet being connected with a sewage treatment tank of the sewage system.

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

[0005] Further, an inlet and an outlet are arranged on the cylinder body of the dust collection mixing cylinder, the inlet is connected with the dust collection pipe, a flow dividing device and a mixing pipe are arranged in the cylinder body of the dust collection mixing cylinder, the mixing pipe is arranged below the flow dividing device, the inlet end of the mixing pipe close to the flow dividing device is in the shape of a horn mouth, the length of the mixing pipe is not less than three times the diameter of the mixing pipe, the center lines of the inlet, the flow dividing device and the mixing pipe are coincident with the center line of the cylinder body of the dust collection mixing cylinder, the spraying device comprises a nozzle, a pipe connected with the nozzle and a water pump, the nozzle is arranged on the center line above the flow dividing device, the spraying direction of the nozzle is the same as the air direction of the inlet, and the outlet is connected with the dust outlet pipe.

[0006] Further, one end of the dust collection pipe is connected with the inlet, and the other end is connected with a horn mouth shaped dust suction cover.

[0007] Further, an air outlet pipe is arranged, which is connected with the air outlet of the main air blower, the air volume introduced by the air outlet pipe is not more than 80% of the air volume of the main air blower, the air outlet pipe is provided with multiple outlets, and the outlets all extend into the dust suction cover.

[0008] Further, the dust collection pipes are symmetrically and uniformly arranged outside the dust collection mixing cylinder body, and the outlets all extend into the dust suction cover, so that the uniformity and efficiency of the air in the dust suction cover are improved, and the dust removal effect is better.

[0009] Further, the mixing pipe is connected with the dust collection mixing cylinder body through a partition plate, one end of the partition plate is fixedly connected with the dust collection mixing cylinder body, the other end is provided with a circular arc connected with the mixing pipe, the mixing pipe is connected with the tangent line of the circular arc to form a horn-shaped dust inlet, and the diameter of the circular arc is 0.1-0.4 times the diameter of the mixing pipe.

[0010] Further, the flow dividing device is arranged in the shape of an umbrella and comprises an umbrella plate and a support, and the support is connected with the dust collection mixing cylinder body.

[0011] Further, the flow dividing device comprises an inclined plate, a water collecting groove and a mounting frame, and the mounting frame is fixedly connected with the dust collection mixing cylinder body.

[0012] Further, a static mixer is arranged in the mixing pipe, the static mixer is an axisless spiral, n is an integer not less than 1, the spiral lead and the diameter are the same, the angle between adjacent n spirals is 180° / n, and the length of the static mixer is not more than 0.5 times the length of the mixing pipe; for a mixing pipe with a large size, the static mixer can also be arranged in the form of an axis spiral blade to increase the strength.

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

[0014] Further, a fan and a driving motor are arranged in the mixing pipe, the driving motor drives the fan through a transmission shaft, the other end of the transmission shaft is connected with the flow dividing device to drive the flow dividing device and the fan to rotate at the same time.

[0015] Further, the demisting device is a rotating demisting disc, which is connected with one end of the driving shaft of the main air blower and rotates at the same time with the main air blower, so that the rotating demisting disc is driven to rotate by the driving power of the main air blower to perform secondary demisting, which is not only energy-saving but also has a better effect than ordinary static demisting.

[0016] Further, an air extractor is arranged close to the dust outlet.

[0017] Beneficial effects

[0018] 1. The main fan is arranged to have an air outlet pipe, and the other end of the air outlet pipe extends into the dust suction hood to introduce the clean air after dust removal into the dust suction hood, thereby increasing the flow rate of the dust-containing air in the dust suction hood and improving the dust removal efficiency and effect.

[0019] 2. The dust inlet, the flow dividing device and the central line of the dust collecting and mixing cylinder are arranged to coincide, so that the mixing of the dust-containing air flow and the water mist in the dust collecting and mixing cylinder is more uniform, the uniformity of the dust removal effect is ensured, the dust inlet of the mixing pipe is arranged in a horn shape, the air inlet resistance can be effectively reduced, the flow of the dust-containing and water-containing air is faster, the dust removal efficiency is improved, and the mud deposited on the baffle at the dust inlet forms a flowing cofferdam, the generation of vortex is reduced, and the dust removal effect is further improved.

[0020] 3. The flow dividing device is arranged in an umbrella shape and cooperates with the spray head to spray water to form a "water curtain" below the umbrella plate, so that the dust-containing waste gas is better mixed with water, and the spray direction of the spray head is the same as the direction of the dust-containing air, so that the dust-containing waste gas is accelerated to flow, thereby improving the dust removal efficiency and effect; and under the action of the water mist and the negative pressure air, the dust-containing waste gas and the water mist form a turbulent region below the umbrella plate, because the flow rate is large enough, the flow line is no longer clear and identifiable, there are many small eddies in the flow field, and there is not only sliding but also mixing between adjacent flow layers, which accelerates the flow of the dust-containing waste gas and the combination area and efficiency with the water mist.

[0021] 4. When the flow dividing device is provided with a water collecting groove, the dust-containing and water-containing air changes the original motion trajectory and speed, so that the dust-containing waste gas forms a speed difference with the water, is combined again, the combination time is prolonged, and the dust removal effect is improved.

[0022] 5. The static mixer is arranged in the mixing pipe, so that the dust-containing waste gas and the water mist are chaotically stirred in the mixing pipe, the direction trajectory is changed multiple times, the dust is more fully combined with the water, and multiple spirals can be arranged according to actual needs, the pitch and diameter of the spirals are the same, and the mixing effect of the water and the dust is improved.

[0023] 6. The groove is arranged below the mixing pipe, the direction of the dust-containing waste water is changed, the mixing effect is increased again, the dust removal cleanliness is improved, and the pressure is also reduced, so that the pressure of the dust-containing waste water is reduced, the service life and reliability of the device are protected.

[0024] 7. The rotating demisting disc is connected to one end of the driving shaft of the main fan and rotates with the main fan, and the rotating demisting disc is rotated by the driving power of the main fan to perform power rotating demisting, which not only saves energy but also has better effect than ordinary static demisting.

[0025] 8. The dust extraction fan is arranged at the dust outlet of the dust collecting mixing cylinder, the dust removing step is moved forward, the efficiency is improved, the workload of the main fan is reduced, and the power of the main fan is reduced.

[0026] In summary, the dust-containing waste gas is mixed with water in the dust collecting mixing cylinder for multiple times, the dust removing efficiency and effect are greatly improved, the main fan is used to discharge air, the dust flowability in the dust hood is improved, a large dust removing mechanism is not needed, the land occupation and equipment investment are saved. BRIEF DESCRIPTION OF DRAWINGS

[0027] The dust collecting pipe is provided in the dust collecting mixing cylinder. Figure 1 、 3 , 5, 6, 15 are a structural schematic diagram provided by the embodiment 1 of the application.

[0028] The dust collecting pipe is provided in the dust collecting mixing cylinder. Figure 2

[0029] The dust collecting pipe is provided in the dust collecting mixing cylinder. Figure 4 The dust collecting pipe is provided in the dust collecting mixing cylinder.

[0030] Figure 5 The dust collecting pipe is provided in the dust collecting mixing cylinder.

[0031] The dust collecting pipe is provided in the dust collecting mixing cylinder. Figure 7 The dust collecting pipe is provided in the dust collecting mixing cylinder.

[0032] Figure 8 The dust collecting pipe is provided in the dust collecting mixing cylinder.

[0033] The dust collecting pipe is provided in the dust collecting mixing cylinder. Figure 9 The dust collecting pipe is provided in the dust collecting mixing cylinder.

[0034] Figure 10 、 11 , 12 is a structural schematic diagram provided by the embodiment 8 of the application.

[0035] The dust collecting pipe is provided in the dust collecting mixing cylinder. Figure 13 The dust collecting pipe is provided in the dust collecting mixing cylinder.

[0036] Figure 14 The dust collecting pipe is provided in the dust collecting mixing cylinder.

[0037] The reference signs are explained as follows:

[0038] ​​​​​1, dust collection system; 11, dust collection pipe; 12, dust outlet pipe; 13, spraying device; 131, spray head; 14, dust collection mixing cylinder; 141, dust inlet; 142, dust outlet; 143, flow dividing device; 1431, umbrella plate; 1432, support; 1433, inclined plate; 1434, water receiving groove; 1435, mounting frame; 144, mixing pipe; 1441, dust inlet port; 1442, static mixer; 145, partition; 146, blocking groove; 15, dust suction cover; 2, exhaust system; 21, treatment cylinder; 211, air outlet pipe; 22, main fan; 23, demisting device; 24, sewage outlet; 25, sound absorbing cotton; 26, rotating demisting disc; 3, sewage system;

[0039] 31, sewage treatment tank; 4, cyclone separator; 5, air suction fan; 6, fan; 7, motor; 71, transmission shaft. DETAILED DESCRIPTION

[0040] Example 1

[0041] As shown in Figure 1 , as shown in Figure 3 , Figure 5 , Figure 6 , Figure 15 : a wet dust removal system includes a dust collection system 1, an exhaust system 2 and a sewage system 3, the dust collection 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 spray head 131 and a water pump and a water pipe connected thereto, the inlet of the dust collection pipe 11 is connected with the upper part of the dust collection mixing cylinder 14, the dust outlet pipe 12 is connected with the lower part of the dust collection mixing cylinder 14, the exhaust system 2 includes a treatment cylinder 21, the upper part of the treatment cylinder 21 is provided with a main fan 22, the treatment cylinder 21 is provided with a demisting device 23, the demisting device uses a general technology such as cyclone demister or turbulent demister for demisting, and the structure is not described in detail, the 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, the lower part of the treatment cylinder 21 is provided with a sewage outlet 24, the dust outlet pipe 12 is arranged obliquely with the horizontal plane and connected with the lower part of the treatment cylinder 21, and the sewage outlet 24 is connected with a sewage treatment tank 31.

[0042] The cyclone separator 4 is arranged above the sewage outlet 24, as shown in Figure 3 , the dust-containing exhaust 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, and the first demisting is performed.

[0043] As shown in Figure 5The large arrow in the shown figure represents the direction of the movement of the dust-containing exhaust gas, and the small arrow represents the movement of the water mist. The dust inlet 141 and the dust outlet 142 are arranged on the dust collection mixing cylinder 14. The shunt device 143 and the mixing pipe 144 are arranged in the dust collection mixing cylinder 14. The mixing pipe 144 is arranged below the shunt device 143. The dust inlet end 1441 of the mixing pipe 144 close to the shunt device 143 is in the shape of a horn. 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 is not less than 3 times the diameter of the mixing pipe. The length of the mixing pipe 144 affects the mixing effect of the dust-containing exhaust gas. The center lines of the dust inlet 141, the shunt device 143, and the mixing pipe 144 coincide with the center line of the dust collection mixing cylinder 14. The mixing of the airflow and the water mist in the dust collection mixing cylinder 14 is more uniform. The uniformity of the dust removal effect is improved. The spraying device 13 is arranged above the shunt device 143. The spraying device 13 includes the spray head 131. The spraying direction of the spray head 131 is the same as the air direction of the dust inlet. The spray head 131 is connected with the water pump through the pipeline. The dust outlet 142 is arranged at the bottom of the dust collection mixing cylinder 14 and is connected with the dust outlet pipe 12. The dust outlet pipe 12 is arranged at a certain slope with the horizontal plane. The sludge deposited at the bottom can flow. The dust inlet end 1441 of the mixing pipe 144 is arranged in the shape of a horn. The air inlet resistance can be reduced. The flow of the dust-containing and water-containing exhaust gas is faster. The dust removal efficiency is improved. The cofferdam of the circular flow is formed at the dust inlet end. The vortex is reduced. The dust removal effect is improved.

[0044] Further, the mixing pipe 144 is connected with the cylinder body of the dust collection mixing cylinder 14 through the partition plate 145. One end of the partition plate 145 is fixedly connected with the inner wall of the cylinder body of the dust collection mixing cylinder 14. The fixed connection is achieved by welding or riveting. The other end is arranged in the shape of a circular arc. The mixing pipe 144 is connected with the external tangent of the circular arc to form the horn-shaped dust inlet end 1441. The diameter of the circular arc is 0.1-0.4 times the diameter of the mixing pipe. The arrangement of the circular arc horn-shaped dust inlet end 1441 can reduce the air inlet resistance of the mixing pipe 144. The flow of the dust-containing and water-containing exhaust gas is faster. The water-containing exhaust gas flows along the circular arc horn-shaped dust inlet end 1441 together with the deposited slurry on the partition plate. An annular area is formed. The deposited slurry flows quickly into the mixing pipe and falls into the bottom of the dust collection mixing cylinder 14. The large arrow in the figure represents the movement direction of the dust-containing exhaust gas. The dust removal efficiency is improved. The cofferdam of the circular flow is formed at the dust inlet end. The vortex is reduced. Figure 6 The arrangement can make the deposited slurry flow faster.

[0045] Further, on the basis of the above-mentioned embodiments, as shown in Figure 3 One end of the dust collection pipe 11 is connected with the dust inlet 141. The other end is connected with the horn-shaped dust suction hood 15.

[0046] Example 2

[0047] Further, on the basis of the above embodiment, as shown in Figure 2 : the air outlet pipe 211 is connected with the air outlet of the main fan 22, the air volume introduced by the air outlet pipe 211 is not more than 80% of the air volume of the main fan 22, the air outlet pipe 211 can be provided with multiple outlets, and the outlets all extend into the dust suction cover 15, the uniformity and efficiency of the air in the dust suction cover are improved, the clean air after the demisting is introduced into the dust suction cover, the flow rate of the dust-containing air in the dust suction cover is increased, the flowability is improved, and the working efficiency is improved.

[0048] Embodiment 3

[0049] Further, on the basis of the above embodiment, as shown in Figure 4 : the dust collection pipes 11 are uniformly arranged on the outer side of the cylinder body of the dust collection mixing cylinder 14 and share one dust suction cover 15, so that the structure is more compact, the air inlet uniformity is good, and multiple dust collection pipes 11 can be arranged.

[0050] Embodiment 4

[0051] Further, on the basis of the above embodiment, as shown in Figure 5 : the shunt device 143 is in the shape of an umbrella and includes an umbrella plate 1431 and a support 1432, the support 1432 is fixedly connected with the inner wall of the cylinder body of the dust collection mixing cylinder 14, a spray head 131 is arranged above the shunt device 143, the spraying direction of the spray head 131 is the same as the air direction of the dust-containing air, the umbrella-shaped shunt device 143 cooperates with the spray head 131 to form a “water curtain” below the umbrella plate 1431, as shown by the dashed line below the umbrella plate 1431 in the figure, so that the dust-containing waste air is better mixed with the water mist, and the spraying direction of the spray head 131 is the same as the air flow direction of the dust-containing air, so that the flow of the dust-containing waste air is accelerated, and the dust removal efficiency and effect are improved; at the same time, under the joint 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 dust-containing waste air will form a turbulent region below the umbrella plate 1431, because the flow rate is large enough, the flow line is no longer clear and identifiable, there are many small eddies in the flow field, there is not only sliding but also mixing between adjacent flow layers, the flow of the dust-containing waste air and the combination area and efficiency with the water mist are accelerated.

[0052] Embodiment 5

[0053] Further, unlike Embodiment 4, as shown in Figure 7 : the shunt device 143 includes an inclined plate 1433, a water collecting groove 1434, and a mounting bracket 1435, the mounting bracket 1435 is fixedly connected with the inner wall of the cylinder body of the dust collection mixing cylinder 14, and the water collecting groove is arranged below the spray head 131, so that the dust-containing and water-containing air changes the original movement track and speed, so that the dust-containing waste air and the water mist form a speed difference, the flow rate is faster, the dust and the water mist are combined again, and the dust removal effect is further improved.

[0054] Example 6

[0055] Further, on the basis of the above examples, as shown in Figure 8 , a static mixer 1442 is arranged in the mixing pipe 144. The static mixer 1442 can be provided with at least one set of helical blades according to requirements, and the helical lead is the same as the diameter. Multiple sets of helical blades can be arranged to make the dust and water-containing waste gas change the direction of travel multiple times, so that the dust and water can be combined more fully. When three sets of helical blades are arranged, the adjacent angle is 60°. The static mixer 1442 should not fill the entire length of the mixing pipe 144. The length of the static mixer 1442 can reach 0.3-0.5 times the length of the mixing pipe 144. The helical blades can be fixed to the inner wall of the mixing pipe 144. For a larger size mixing pipe 144, the static mixer 1442 can also be arranged as a shaft helical blade to increase the strength.

[0056] Example 7

[0057] Further, on the basis of the above examples, as shown in Figure 5 , Figure 9 , a baffle groove 146 is arranged in the dust collection mixing cylinder 14. The baffle groove 146 is arranged below the mixing pipe 144. The baffle groove 146 can be fixed to the mixing pipe 144 or the dust collection mixing cylinder 14. Multiple rows of through holes are uniformly arranged on the bottom plate and the peripheral baffle plate of the baffle groove 146. The size of the holes can be set according to actual working conditions to facilitate the passage of dust-containing sewage. The arrangement of the baffle groove 146 changes the original trajectory direction of the dust-containing sewage, increases the mixing effect, improves the dust removal cleanliness, and also plays a role in pressure reduction. The pressure of the dust-containing sewage and waste gas is reduced, the reliability of the device is improved, and the service life is prolonged.

[0058] Example 8

[0059] Further, on the basis of the above examples, as shown in Figure 10 , Figure 11 , Figure 12 , the demisting device is a rotating demisting disc 26. One end of the extension of the driving shaft of the main fan 22 is fixed to the rotating demisting disc 26. The driving device of the main fan 22 drives the main fan 22 and the rotating demisting disc 26 to rotate at the same time. When the rotating demisting disc 26 rotates, the large-particle water-containing dust is thrown to a position far away from the center of the driving shaft and flows down along the inner wall of the treatment cylinder 21. The efficiency and effect of the rotating demisting disc 26 are better than those of the static demisting device. Different use scenarios can be used in combination with the static demisting device as shown in Figure 12 .

[0060] Example 9

[0061] Further, as shown in Figure 13 ,As shown, a fan 6 and a drive motor 7 are installed in the mixing pipe. The drive motor 7 drives the fan 6 through a transmission shaft 71. The other end of the transmission shaft 71 is connected to the diversion device 143, which drives the diversion device 143 and the fan 6 to rotate simultaneously. This not only saves energy but also improves the dust removal effect. The rotation of the diversion device 143 can make the water mist faster. The dust collection mixing cylinder 14 can also be set into a cylindrical shape. The dust inlet 141 is located on the upper side of the dust collection mixing cylinder 14. The dust entering the dust collection mixing cylinder 14 generates a cyclone effect under negative pressure.

[0062] Example 10

[0063] Furthermore, based on the above embodiments, such as Figure 14 As shown, an exhaust fan 5 is installed near the dust outlet 142 to increase dust removal efficiency and effectively reduce the power of the main fan 22.

[0064] 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 collection hood 15. After multiple mixing in the dust collection mixing cylinder 14, the water-containing dust first enters the lower part of the exhaust system 2 through the dust outlet pipe 12. After the initial demisting separation by the cyclone separator 4, the larger water-containing dust particles fall into the sewage treatment tank 31. The remaining water-containing dust enters the demisting device 23. After that, part of the clean air is discharged into the atmosphere, and part of it is introduced into the dust collection hood 15 by the air outlet pipe 211. The clean air after demisting is introduced into the dust collection hood 15, which increases the dust-containing airflow velocity in the dust collection hood 15.

[0065] 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, utilizing the air output of the main fan 22. The air volume introduced by the air outlet pipe 211 is no more than 80% of the air output of the main fan 22. The outlet of the other end of the air outlet pipe 211 extends into the dust collection hood 15, introducing clean air after demisting into the dust collection hood 15, increasing the air velocity of the dust-laden air inside the dust collection hood 15. Second, the center line of the dust inlet 141 and the center line of the diverting device 143 are respectively aligned with the center line of the dust collection mixing cylinder 14, making the mixing of airflow and 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 funnel shape, which can reduce the air intake resistance, make the air containing dust and water flow faster, improve the dust removal efficiency, and form a flow weir at the dust inlet port 1441, reducing the generation of eddies and further improving the dust removal effect.

[0066] The shunt device 143 is arranged as an umbrella shape, matched with the spray head 131, so that the water forms a "water curtain" below the umbrella plate 1431, so that the dust-containing waste gas is better mixed with the water, and the spraying direction of the spray head 131 is the same as the flowing direction of the dust-containing air, which accelerates the flowing of the dust-containing waste gas, and further improves the dust removal efficiency and effect; at the same time, under the action of the water mist and the negative pressure air, the dust-containing waste gas and the water mist form a turbulent flow below the umbrella plate 1431, because the flow rate is large enough, the streamline is no longer clear and identifiable, and there are many small eddies in the flow field, and there is not only sliding but also mixing between adjacent flow layers, which accelerates the flowing of the dust-containing waste gas and the combination with the water mist, and accelerates the flowing of the dust-containing waste gas and the combination with the water mist;

[0067] When the shunt device 143 is provided with the water collecting groove 1434, the original movement track of part of the dust-containing water-containing air is changed, a speed difference is formed, so that the dust-containing waste gas is combined with the water again, the mixing time is prolonged, and the dust removal effect is improved;

[0068] The static mixer 1442 is arranged in the mixing pipe 144, and the sewage combined with the dust-containing waste gas is subjected to chaotic stirring in the mixing pipe 144, the dust-containing waste gas changes the advancing direction for multiple times during the stirring process, so that the dust is more fully combined with the water, and multiple spirals can be arranged according to actual needs, and the same pitch and diameter of the spirals can better improve the mixing effect of the water and the dust;

[0069] The blocking groove 146 is arranged below the mixing pipe 144, the direction of the dust-containing waste water is changed, the mixing effect is improved, the dust removal cleanliness is enhanced, and the pressure is also reduced, so that the pressure of the dust-containing sewage is reduced, the reliability of the device is improved, and the service life is prolonged;

[0070] In summary, in the present application, the dust-containing waste gas is first effectively mixed with the water mist through the "water curtain" formed by the shunt device 143, is secondly effectively mixed in the "turbulent flow" area formed below the shunt device 143 by the umbrella plate 1431, is thirdly mixed at the horn mouth of the mixing pipe 144 through the circular arc horn mouth, is fourthly mixed in the mixing pipe 144 through the static mixer 1442, and is fifthly mixed at the blocking groove 146, and after multiple high-speed effective mixings, the dust removal effect is further improved. After multiple mixings, the water-containing dust first passes through the dust outlet pipe 12 to the lower part of the exhaust system 2, is preliminarily separated by the cyclone separator 4, the larger particle water-containing dust falls into the sewage treatment tank 31, the remaining water-containing dust enters the dust removal device 23, part of the clean air is discharged into the atmosphere, and part of the clean air is introduced into the dust suction hood 15 through the air outlet pipe 211, so that the dust-containing air flow rate in the dust suction hood 15 is increased.

Claims

1. A wet dust removal system, characterized in that: The system 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 which is connected to one end of a dust collection pipe, and the lower part of which is connected to a dust outlet pipe. A spray device is installed inside the dust collection mixing cylinder. The exhaust system includes a treatment cylinder, the upper part of which is equipped with a main fan, and the lower part of which is equipped with a demisting device. A sewage outlet is installed at the lower part of the treatment cylinder. The dust outlet pipe is inclined and connected to the lower part of the treatment cylinder. The sewage outlet is connected to the sewage treatment tank of the sewage discharge system.

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

3. The wet dust removal system according to claim 2, characterized in that: The dust collection mixing cylinder has a dust inlet and a dust outlet. The dust inlet is connected to the dust collection pipe. The dust collection mixing cylinder contains a diversion device and a mixing pipe. The mixing pipe is located below the diversion device. The dust inlet of the mixing pipe near the diversion device is funnel-shaped. The length of the mixing pipe is not less than three times its diameter. The centerlines of the dust inlet, the diversion device, and the mixing pipe all coincide with the centerline of the dust collection mixing cylinder. The spraying device includes a nozzle and connected pipes and a water pump. The nozzle is located on the centerline above the diversion device. The spraying direction of the nozzle is the same as the direction of the incoming air. 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 collection pipe is connected to the dust inlet, and the other end is connected to a funnel-shaped dust suction hood.

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

6. A wet dust removal system according to claim 4, characterized in that: The dust collection pipes are evenly distributed on the outside of the dust collection mixing cylinder, and their outlets all extend into the dust collection hood.

7. A wet dust removal system according to claim 3, characterized in that: The mixing pipe is connected to the dust collection mixing cylinder body through a partition. One end of the partition is fixed to the dust collection mixing cylinder body, and the other end is set as an arc and connected to the mixing pipe. The mixing pipe is connected to the outer tangent of the arc to form a funnel-shaped dust inlet port, and the diameter of the arc is 0.1-0.4 times the diameter of the mixing pipe.

8. A wet dust removal system according to claim 3, characterized in that: The diversion device is configured in the shape of an umbrella, including an umbrella panel and a support, the support being connected to the dust collection and mixing cylinder.

9. A wet dust removal system according to claim 3, characterized in that: The diversion device includes an inclined plate, a water receiving tank, and a mounting bracket.

10. A wet dust removal system according to claim 9 or 10, characterized in that: The mixing tube is equipped with a static mixer, which is a shaftless spiral with n being an integer not less than 1, and the spiral lead is the same as the diameter. 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: The dust collection mixing cylinder is provided with a baffle groove, which is located below the mixing pipe. The bottom plate and the surrounding baffle of the baffle groove are evenly provided with multiple rows of through holes.

12. A wet dust removal system according to claim 3, characterized in that: The mixing pipe is equipped with a fan and a drive motor. The drive motor drives the fan through a transmission shaft. The other end of the transmission shaft is connected to the diversion device, driving the diversion 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 disc, which is connected to one end of the drive 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 installed near the dust outlet.

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