Distributed dust removal system

Abstract

The utility model discloses a distributed dust removal system which comprises a plurality of dust suction devices, a sewage pipe and a backflow treatment bin, the dust suction devices can be distributed in a plurality of areas needing dust removal, sewage outlets of the dust suction devices are communicated with the sewage pipe in parallel, and the tail end of the sewage pipe is connected with the bottom of the backflow treatment bin. A demisting device, an air outlet, a sludge pipe and a clear water pipe are arranged in the backflow treatment bin, the clear water pipe is connected with a water inlet pipe of the dust suction device after being connected with a water pump and provides a water source for the dust suction device, an inlet of the sludge pipe extends into the bottom of the backflow treatment bin, an outlet of the sludge pipe is connected with the filter press, and the air outlet is connected with the main fan. The starting end of the sewage pipe is higher than the tail end of the sewage pipe in the horizontal direction, sewage can conveniently flow back to the backflow treatment bin, dust is effectively mixed at a high speed for multiple times in the dust collection stage through the arrangement of the dust collection device, the dust collection efficiency and effect are improved, the treatment process of the dust collection system is shortened, water resources are recycled, and the environment is protected. And'zero discharge 'of dust and sewage is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of dust removal, in particular to a distributed dust removal system. Background Art

[0002] With the development of economy and society, dust collectors are also widely used in production and life in all walks of life. However, for some industries with serious dust pollution and large-scale unorganized emissions, such as metallurgical smelting, mining and other industries, the current dust removal technology is multiple dust collection ports and one main dust collector. It has the defects of low efficiency, high energy consumption, complex system, large floor space, high water consumption, poor dust removal effect, high operating investment cost, etc. due to the long dust collection channel. In addition, the dust collection pipeline is easy to be blocked. Once the pipeline is blocked, the whole system will be paralyzed. Summary of the invention

[0003] The utility model can effectively mix the dust with water mist during the dust collection stage, shorten the dust removal system processing flow, reduce the floor space, and at the same time recycle water resources, reduce water consumption, reduce operating costs, achieve "zero emission" of dust and sewage, and reduce environmental pollution.

[0004] In order to improve the dust removal effect, the utility model adopts the following technical scheme: a distributed dust removal system: comprising a plurality of dust suction devices, the plurality of dust suction devices can be distributed in a plurality of areas requiring dust removal, a sewage pipe and a reflux treatment bin, the sewage outlets of the plurality of dust suction devices are connected in parallel to the sewage pipe, the end of the sewage pipe is connected to the bottom of the reflux treatment bin, a defogger, an air outlet, a sludge pipe and a clean water pipe are arranged in the reflux treatment bin, the clean water pipe is connected to the water inlet pipe of the dust suction device after being connected to the water pump, and the purified sewage is reused, the sludge pipe inlet extends into the bottom of the reflux treatment bin, the sludge pipe outlet is connected to the filter press, the air outlet is connected to the main fan, the main fan is connected to the chimney, the bottom of the reflux treatment bin is funnel-shaped or "V"-shaped, the defogger is a wire mesh defogger, the starting end of the sewage pipe is arranged horizontally higher than the end of the sewage pipe, so as to facilitate the reflux of sewage to the reflux treatment bin, the main fan, the filter press and the water pump are connected to the drive system.

[0005] Furthermore, a spraying device is arranged in the sewage pipe, and the spraying device is connected to a water pump and a water tank. The spraying device is arranged in the sewage pipe, and the pipe can be regularly flushed at ordinary times to reduce the sludge accumulation in the pipe.

[0006] Furthermore, the dust suction device includes a cylinder body, which is provided with a dust inlet and a sewage outlet, the dust inlet is arranged above the cylinder body, the sewage outlet is arranged at the bottom of the cylinder body, a diverter device and a mixing tube are arranged in the cylinder body, the mixing tube is arranged below the diverter device, a nozzle is arranged above the diverter device, the spraying direction of the nozzle is the same as the air direction of dust intake, the nozzle is connected to the water inlet pipe, 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 diverter device, the nozzle and the mixing tube all coincide with the center line of the cylinder body, and when the dust inlet is directly above the cylinder body, the center line of the dust inlet coincides with the center line of the cylinder body.

[0007] Furthermore, an exhaust system is arranged near one end of the sewage outlet of the sewage pipe, and the exhaust system comprises an axial flow fan. The exhaust system is arranged on each dust collecting device to reduce the power of the main fan.

[0008] Furthermore, the barrel is arranged in a cylindrical shape, and the dust inlet is arranged on the upper side of the barrel. The dust inlet is arranged on the upper side of the barrel, which can save space. The side air intake can generate a cyclone on the barrel wall, and the dust removal effect is better.

[0009] Furthermore, the mixing tube is connected to the cylinder through a partition, one end of the partition is fixedly connected to the cylinder, and the other end is arranged in an arc shape and 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 0.25-0.6 times the diameter of the mixing tube.

[0010] Furthermore, the diversion device is configured to be in an umbrella shape, including an umbrella plate and a bracket, and the bracket is connected to the cylinder.

[0011] Furthermore, the diversion device includes an inclined plate, a water receiving trough and a mounting frame, and the mounting frame is connected to the cylinder.

[0012] Furthermore, a static mixer is arranged in the mixing tube, and the static mixer is a shaftless spiral and there is at least one of the shaftless spirals, and the adjacent angles of n shaftless spirals are 180° / n, and the spiral lead is the same as the diameter.

[0013] Furthermore, a retaining groove is arranged in the 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.

[0014] Furthermore, a fan and a driving motor are arranged in the mixing tube, and 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.

[0015] Beneficial Effects

[0016] 1. The dust suction and dust removal are moved forward to the dust collection ports of each dust removal area. The dust and water are effectively mixed while collecting the dust, which shortens the dust removal system processing process and reduces the floor space. At the same time, water resources are recycled to reduce water consumption and operating costs, achieving "zero discharge" of dust and sewage and reducing environmental pollution.

[0017] 2. Install a spraying device in the middle of the sewage pipe to flush the pipe at any time for maintenance to prevent blockage.

[0018] 3. The dust inlet, the diverter device, the nozzle and the center line of the cylinder are coincident, so that the mixing of the airflow and the water mist in the cylinder is more uniform, thereby improving the uniformity of the dust removal effect. The dust inlet port of the mixing tube is configured as an arc trumpet shape, which can reduce the air intake resistance and make the dust-containing and water-containing air flow faster, thereby improving the dust removal efficiency. In addition, the mud precipitated on the partition at the dust inlet port forms a flowing cofferdam, thereby reducing the generation of vortices and further improving the dust removal effect.

[0019] 4. The diversion device is set in an umbrella shape, and the water mist is sprayed by the nozzle to form a "water curtain" under the umbrella plate, so that the dust-containing exhaust gas can be better mixed with water. Moreover, the spray direction of the nozzle is the same as the direction of the dust-incoming air, so that the dust-containing exhaust gas is accelerated to flow, thereby improving the dust removal efficiency and effect; moreover, under the action of water mist and negative pressure air, a turbulent area will be formed under the umbrella plate. Because the flow rate is large enough, the streamlines are no longer clearly discernible, and there are many small vortices in the flow field. There is not only sliding but also mixing between adjacent flow layers, which accelerates the flow of dust-containing exhaust gas and the combination area and efficiency with water mist.

[0020] 5. When the diversion device is equipped with a water tank, the dust-containing and water-containing air part changes its original movement trajectory and speed, so that the dust-containing exhaust gas and water form a speed difference, and then combine again, which prolongs the combination time and improves the dust removal effect;

[0021] 6. A static mixer is set in the mixing tube to combine the dust-containing exhaust gas and water again and perform chaotic stirring in the mixing tube. The travel direction is changed multiple times to make the dust and water combine more fully. In addition, multiple spirals can be set according to actual needs. The spiral lead and diameter are the same to improve the mixing effect of water and dust. For larger-sized mixing tubes, the static mixer can also be set to an axial spiral blade to increase strength.

[0022] 7. A retaining groove is set under the mixing pipe to change the direction of the dust-containing wastewater, increase the mixing effect, improve the dust removal cleanliness, and also play a role in reducing pressure, reducing the pressure of the pressurized dust-containing wastewater and protecting the life and reliability of the device.

[0023] 8. The fan is set in the mixing tube, and a driving system drives the fan and the diverter device to rotate at the same time. This not only saves energy, but also improves the dust removal effect. The diverter device rotates without a nozzle to achieve a better mixing effect. Combined with the water mist sprayed by the nozzle, the water mist particles are faster and more efficient in combining with the dust.

[0024] 9. An exhaust system is set at one end of the sewage outlet to exhaust air, so that the flow rate of water-containing dust is faster, which can flush the cylinder and the bottom of the sewage pipe and reduce the deposition of sludge.

[0025] In short, the utility model enables the dust-containing exhaust gas to be effectively mixed multiple times in the cylinder at the dust collecting end, which greatly improves the dust removal efficiency and effect, distributes the dust removal work to each dust collecting port in advance, and can effectively reduce the power of the dust removal main fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Attached Figure 1 , 2 A structural schematic diagram provided for Example 1 of the present application;

[0027] Attached Figure 3 A structural schematic diagram provided for Example 2 of the present application;

[0028] Attached Figure 4 A schematic diagram of the structure of a flow diversion device provided in an embodiment of the present application;

[0029] Attached Figure 5 A schematic diagram of the structure of a static mixer provided in an embodiment of the present application;

[0030] Attached Figure 6 A schematic diagram of the structure of a retaining groove provided in an embodiment of the present application;

[0031] Attached Figure 7 A schematic diagram of the structure of a flow diversion device provided in an embodiment of the present application;

[0032] Attached Figure 8 Provide a structural schematic diagram for Example 8 of the present application;

[0033] The following are the descriptions of the reference numerals:

[0034] 1. Dust collecting device; 11. Sewage outlet; 12. Water inlet pipe; 13. Cylinder; 131. Dust inlet; 132. Partition plate; 133. Diverter; 1331. Umbrella plate; 1332. Bracket; 1333. Inclined plate; 1334. Water receiving trough; 1335. Mounting frame; 134. Mixing tube; 1341. Dust inlet port; 1342. Static mixer; 135. Sprinkler; 136. Axial flow fan; 137. Stop slot;

[0035] 2. Sewage pipe; 21. Spraying device; 3. Backflow treatment chamber; 31. Demisting device; 32. Air outlet; 33. Mud pipe;

[0036] 34. Clean water pipe; 35. Water pump; 36. Filter press; 4. Main fan; 41. Chimney; 5. Drive motor; 51. Transmission shaft; 6. Fan. DETAILED DESCRIPTION

[0037] Example 1

[0038] like Figure 1 As shown, a distributed dust removal system includes multiple dust suction devices 1, a sewage pipe 2 and a return treatment bin 3. The sewage outlets 11 of the multiple dust suction devices 1 are connected in parallel to the sewage pipe 2. The multiple dust suction devices can be distributed in multiple areas where dust removal is required. The sewage of each dust suction device 1 flows into the sewage pipe 2. The end of the sewage pipe 2 is connected to the return treatment bin 3 and flows into the return treatment bin 3. The starting end of the sewage pipe 2 is arranged horizontally higher than the end of the sewage pipe 2 to facilitate the sewage to flow back to the return treatment bin 3. A spraying device 21 is arranged in the sewage pipe 2. The spraying device 21 includes a nozzle. The spraying device 21 is connected to a water pump and a water tank. The spraying device 21 can clean the sewage pipe 2 regularly. A water tank can be arranged in the middle of the sewage pipe 2. The water in the water tank can also be connected to the clean water pipe 34. The sewage is returned to the reflux treatment bin 3 and precipitated at the bottom. A defogger 31, an air outlet 32, a mud pipe 33 and a clean water pipe 34 are arranged in the reflux treatment bin 3. The water inlet end of the clean water pipe 34 extends to the upper part of the liquid surface. The clean water pipe 34 is connected to the water pump 35 and then connected to the water inlet pipe 12 of the dust suction device to recycle the precipitated sewage. The inlet of the mud pipe 33 extends to the bottom of the reflux treatment bin 3, and the outlet of the mud pipe 33 is connected to the filter press 36. The air outlet 32 ​​is connected to the main fan 4, and the air outlet of the main fan 4 is connected to the chimney 41. The main fan 22, the filter press 36 and the water pump 35 are connected to the drive system. The bottom of the reflux treatment bin 3 is funnel-shaped or "V"-shaped to facilitate sludge precipitation, and the defogger 31 is a wire mesh defogger.

[0039] like Figure 2 As shown, Figure 2The large arrow in the figure indicates the movement direction trajectory of the dust-containing exhaust gas, and the small arrow indicates the movement trajectory of the water mist. The dust collecting device 1 includes a cylinder 13, on which a dust inlet 131 and a sewage outlet 11 are provided. The sewage outlet 11 is arranged at the bottom of the cylinder 13, and a diverter device 133 and a mixing tube 134 are arranged in the cylinder 13. The mixing tube 134 is arranged below the diverter device 133, and a nozzle 135 is arranged above the diverter device 133. The spraying direction of the nozzle 135 is the same as the direction of the dust-intake air, and the nozzle 135 is connected to the water inlet pipe 12. The dust inlet port 1341 of the mixing tube 134 close to the diverter device 133 is in the shape of a trumpet, and the length of the mixing tube 134 is not less than three times the diameter of the mixing tube, and the length of the mixing tube is not easy to be less than 3 times the diameter of the mixing tube, which affects the mixing effect of the dust-containing exhaust gas; the center lines of the dust inlet port 131, the diverter device 133 and the mixing tube 134 all coincide with the center line of the cylinder 13, so that the mixing of the dust airflow and the water mist in the cylinder 13 is more uniform, thereby improving the uniformity of the dust removal effect, and the dust inlet port 1341 of the mixing tube 134 is set to be trumpet-shaped, which can reduce the air intake resistance, make the dust-containing and water-containing exhaust gas flow faster, and improve the dust removal efficiency. In addition, the mud precipitated on the partition at the dust inlet port forms a flowing cofferdam, which reduces the generation of vortexes and further improves the dust removal effect.

[0040] In the cylinder 13 of the dust collecting device 1 of the present application, dust and water are effectively mixed for multiple times, thereby solving the technical problems of large energy loss, large fan power and poor effect caused by the excessively long exhaust gas conveying pipeline.

[0041] Furthermore, if Figure 2 As shown, an exhaust system is provided at one end near the sewage outlet 11, and the exhaust system includes an axial flow fan 136. The fan is provided on the dust suction device, and dust removal is performed in the dust suction link, so that the dust removal path is shortened, the power loss is low, and the power of the main fan can be effectively reduced.

[0042] Example 2

[0043] Further, based on the above embodiments, Figure 3 As shown, the barrel 13 is set to a cylindrical shape, and the dust inlet 131 is set on the upper side of the barrel 13. The dust inlet 131 is set on the upper side of the barrel 13, which can save space. When the barrel 13 is set to a cylindrical shape, the side air intake can make the dust-containing exhaust gas entering the barrel produce a cyclone effect, and the dust removal effect is better.

[0044] Example 3

[0045] Further, based on the above embodiments, Figure 2 , Figure 4As shown, the large arrow in the figure indicates the movement direction trajectory of the dust-containing exhaust gas, and the small arrow indicates the movement trajectory of the water mist. The mixing tube 134 is connected to the cylinder 13 through the partition 132. One end of the partition 132 is welded to the cylinder 13, and the end of the other end is set to be an arc-shaped dust inlet port. The mixing tube 134 is connected to the outer tangent of the arc to form a trumpet-shaped dust inlet port 1341, and the diameter of the arc is 0.1-0.4 times the diameter of the mixing tube. The setting of the arc trumpet of the dust inlet port 1341 can reduce the intake resistance entering the mixing tube 134, so that the dust-containing and water-containing exhaust gas flows faster. The exhaust gas mixed with water drives the sedimentation mud on the partition to flow together at the outer edge of the arc trumpet of the dust inlet port 1341, forming an annular cofferdam area, reducing the generation of vortexes. The sedimentation mud quickly flows into the mixing tube and falls into the bottom of the cylinder 13. It is also possible to open a hole on the partition 132 according to the amount of sedimentation mud to make the sedimentation mud flow faster.

[0046] Example 4

[0047] Further, based on the above embodiments, Figure 4 The diverter 133 is configured in an umbrella shape, including an umbrella plate 1331 and a bracket 1332. The bracket 1332 is fixedly connected to the cylinder 13. The umbrella-shaped diverter cooperates with the nozzle 6 to spray water mist, so that the water forms a "water curtain" below the umbrella plate 1331, as shown by the dotted line below the umbrella plate 1331 in the figure, so that the dust-containing exhaust gas is better mixed with the water mist. Moreover, the spraying direction of the nozzle is the same as the direction of the dust-intake air, so that the dust-containing exhaust gas is accelerated to flow, thereby improving the dust removal efficiency and effect; moreover, under the action of water mist and air, as shown in FIG. Figure 1 As shown by the small arrows, part of the water mist and dust-containing exhaust gas form a turbulent area under the umbrella plate 1331. Because the flow velocity is large enough, the streamlines are no longer clearly discernible, there are many small vortices 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 exhaust gas and the combination area and efficiency with the water mist.

[0048] Example 5

[0049] Further, based on the above embodiments, Figure 7 The diversion device 133 includes an inclined plate 1333, a water receiving trough 1334 and a mounting frame 1335. The mounting frame 1335 is fixedly connected to the cylinder 13. The water receiving trough 1334 is provided to change the original movement trajectory of the dust-containing and water-containing air part, forming a speed difference and a faster flow rate, so that the dust-containing exhaust gas and water are combined again, further improving the dust removal effect.

[0050] Example 6

[0051] Further, based on the above embodiments, Figure 4 , Figure 5As shown, a static mixer 1342 is provided in the mixing tube 134. The static mixer 1342 can be provided with multiple sets of spiral blades as needed, and the spiral lead and diameter are the same. The length of the static mixer 1342 can be about 1 / 3 of the length of the mixing tube. Figure 5 When 4 sets of spirals are set, the adjacent angles are 45°. The static mixer should not fill the entire length of the mixing tube 134, but 0.3-0.5 times the length of the mixing tube 134 is sufficient. For mixing tubes of larger sizes, the static mixer can also be set to have axial spiral blades to increase strength.

[0052] Example 7

[0053] Further, based on the above embodiments, Figure 2 , Figure 6 As shown, a retaining groove 137 is provided in the cylinder 13, and the retaining groove 137 is arranged below the mixing tube 134. The retaining groove 137 can be fixedly connected to the mixing tube 134 or to the cylinder 13. A plurality of rows of through holes are evenly arranged on the bottom plate and the surrounding baffles of the retaining groove 137 to facilitate the passage of dust-containing sewage. The retaining groove 137 is provided to change the original trajectory direction of the dust-containing wastewater, increase the mixing effect, improve the dust removal cleanliness, and also play a role in reducing pressure, so as to reduce the pressure of the pressurized dust-containing sewage and protect the life and reliability of the device.

[0054] Example 8

[0055] Further, based on the above embodiments, Figure 8 A fan 6 and a driving motor 5 are arranged in the mixing tube 134. The driving motor 5 drives the fan 6 through a transmission shaft 51. The other end of the transmission shaft 51 is connected to the diverter device 133, driving the diverter device 133 and the fan 6 to rotate simultaneously; through the rotation of the diverter device 133, the water falling into the diverter device 133 is quickly and evenly thrown into the space of the cylinder to combine with the dust-containing exhaust gas.

[0056] In summary, the advantages of the present application are that dust and water are effectively mixed multiple times during the dust collection stage. The dust-containing exhaust gas first passes through the "water curtain" formed by the diverter device 133 of the dust collection device 1, so that the dust-containing exhaust gas and water mist are effectively mixed for the first time. The "turbulent flow" area formed under the umbrella-shaped diverter device is effectively mixed for the second time. At the bell mouth of the mixing tube 134, the third mixing is carried out through the bell mouth of the arc. In the mixing tube, the fourth mixing is carried out through the static mixer 1342. The fifth mixing is carried out at the retaining groove 137. After multiple high-speed and effective mixing, the dust removal effect is improved, the problem of large dust concentration area is solved, and the treated sewage is recycled.

Claims

1. A distributed dust removal system, characterized in that: It comprises a plurality of dust suction devices, a sewage pipe and a return flow treatment bin, the sewage outlets of the plurality of dust suction devices are connected in parallel to the sewage pipe, the end of the sewage pipe is connected to the return flow treatment bin, a defogger, an air outlet, a mud pipe and a clean water pipe are arranged in the return flow treatment bin, the clean water pipe is connected to a water pump and then to a water inlet pipe of the dust suction device, so that the purified sewage is reused, the mud pipe inlet extends into the bottom of the return flow treatment bin, the mud pipe outlet is connected to a filter press, the air outlet is connected to a main fan, the main fan is connected to a chimney, the bottom of the return flow treatment bin is funnel-shaped or "V"-shaped, the starting end of the sewage pipe is arranged horizontally higher than the end of the sewage pipe, so as to facilitate the sewage to flow back to the return flow treatment bin, the main fan, the filter press and the water pump are connected to a driving system.

2. The distributed dust removal system according to claim 1, characterized in that: A spraying device is arranged in the sewage pipe, and the spraying device is connected with a water pump and a water tank.

3. The distributed dust removal system according to claim 1, characterized in that: The dust suction device includes a cylinder body, which is provided with a dust inlet and a sewage outlet, the dust inlet is arranged above the cylinder body, and the center line of the dust inlet coincides with the center line of the cylinder body, the sewage outlet is arranged at the bottom of the cylinder body, a diverter device and a mixing tube are arranged in the cylinder body, the mixing tube is arranged below the diverter device, a nozzle is arranged above the diverter device, the spraying direction of the nozzle is the same as the air direction of dust intake, the nozzle is connected to the water inlet pipe, the mixing tube is trumpet-shaped near the dust inlet port of the diverter device, the length of the mixing tube is not less than three times the diameter of the mixing tube, and the center lines of the diverter device, the nozzle and the mixing tube all coincide with the center line of the cylinder body.

4. A distributed dust removal system according to claim 3, characterized in that: An exhaust system is arranged at one end close to the sewage outlet, and the exhaust system includes an axial flow fan.

5. A distributed dust removal system according to claim 3, characterized in that: The barrel is configured to be cylindrical, and the dust inlet is configured to be disposed on the upper side of the barrel.

6. A distributed dust removal system according to claim 3, characterized in that: The mixing tube is connected to the cylinder through a partition, one end of the partition is fixedly connected to the cylinder, and the other end is arranged in an arc shape and 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.

7. A distributed 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.

8. A distributed 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.

9. A distributed dust removal system according to claim 7 or 8, characterized in that: The mixing tube is provided with a static mixer, which is a shaftless spiral and at least one of which is provided. The adjacent angles of n shaftless spirals are 180° / n, and the spiral lead is the same as the diameter.

10. A distributed dust removal system according to claim 3, characterized in that: A retaining groove is arranged in the 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.

11. A distributed 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.

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