Wet-type centrifugal dust removal device for leather spraying waste gas

Abstract

The utility model provides a wet-type centrifugal dust removal device for leather spraying waste gas. The wet-type centrifugal dust removal device comprises a shell, a pre-wetting dust removal cavity arranged on the lower side of the shell and a circulating water tank arranged on the lower side of the pre-wetting dust removal cavity, an air inlet is formed in the pre-wetting dust removal cavity; a driving motor is fixedly arranged on the upper side of the pre-wetting dust removal cavity, and a centrifugal rotating wheel is arranged on the lower side of the driving motor; a negative pressure fan is arranged on the upper side of the shell; an atomization spraying device is arranged in the pre-wetting dust removal cavity; the centrifugal rotating wheel is arranged above the atomization spraying device, the atomization spraying device comprises a first spraying pipe arranged in the pre-wetting dust removal cavity and a first spraying water pump communicated with the first spraying pipe, and a water inlet of the first spraying water pump is communicated with the circulating water tank; an atomizing nozzle is arranged on the first spraying pipe; the dust removal device has the characteristics of high dust removal efficiency, simple structure and capability of reducing the dust removal pressure of subsequent filtration.

Description

Technical Field

[0001] The utility model relates to a wet centrifugal dust removal device for leather spraying waste gas, and relates to the technical field of leather waste gas treatment equipment. Background Art

[0002] Currently, the leather industry utilizes a combination of wet and filtration methods to remove dust from spraying exhaust. Due to the diverse particle sizes and physical properties of particles in spraying exhaust, achieving optimal dust removal requires multi-stage wet dust removal and complex structural designs. Even with these improvements, a significant amount of particles still require filtration. Inadequate upstream dust removal significantly impacts filtration, leading to frequent filter changes and significant solid waste generation.

[0003] A centrifuge is a mechanical device that uses centrifugal force to separate substances. The centrifugal force acts by displacing different substances based on their density, viscosity, particle size, shape, and other properties, thereby achieving separation and filtration. Centrifuges are generally considered primarily suitable for separating and filtering liquids and are commonly used in the fine chemical, pharmaceutical, food and beverage, and wastewater treatment industries. They are not suitable for dust removal from spraying exhaust gases. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a wet centrifugal dust removal device for leather spraying exhaust gas which highly combines the principles of wet dust removal and centrifugal separation, integrates them into one, retains the advantages of wet dust removal and centrifugal separation, overcomes the disadvantages, has high dust removal efficiency, simple structure, and reduces the pressure of post-filtration dust removal.

[0005] In order to achieve the above technical problems, the technical solution adopted by the utility model is:

[0006] A wet centrifugal dust removal device for leather spraying exhaust gas, comprising a housing, a pre-wet dust removal cavity arranged on the lower side of the housing, and a circulating water tank arranged on the lower side of the pre-wet dust removal cavity;

[0007] An air inlet is provided on the pre-wet dust removal cavity;

[0008] A driving motor is fixedly arranged on the upper side of the pre-wet dust removal chamber, and a centrifugal wheel is arranged on the lower side of the driving motor;

[0009] A negative pressure fan is provided on the upper side of the housing;

[0010] An atomizing spray device is provided in the pre-wet dust removal cavity;

[0011] The centrifugal wheel is arranged above the atomizing spray device.

[0012] Furthermore, the atomizing spray device includes a first spray pipe provided in the pre-wetting dust removal cavity and a first spray water pump connected to the first spray pipe, wherein the water inlet of the first spray water pump is connected to the circulating water tank;

[0013] The first spray pipe is provided with an atomizing nozzle, and the atomizing nozzle opening is arranged upward;

[0014] The centrifugal wheel is arranged above the first spray pipe.

[0015] Furthermore, a partition is provided on the upper side of the pre-wet dust removal cavity, the partition is located on the upper side of the air inlet, a mounting hole is provided on the partition, and a centrifugal wheel is provided in the mounting hole.

[0016] Furthermore, a deflector cover is provided above the mounting hole.

[0017] Furthermore, the centrifugal wheel includes a rim arranged in the mounting hole, a hub connected to the output shaft of the drive motor, and spokes connecting the rim and the hub.

[0018] Furthermore, the center line of the wheel rim coincides with the center line of the mounting hole.

[0019] Furthermore, the spokes are perpendicular to the output shaft of the driving motor.

[0020] Furthermore, the spoke has a thickness of 1 to 40 cm.

[0021] Furthermore, a filler layer, a spray chamber, a filter layer, a negative pressure chamber, an activated carbon adsorption layer and an air outlet are sequentially arranged above the pre-wet dust removal chamber;

[0022] The negative pressure fan is arranged in the negative pressure chamber.

[0023] Furthermore, a second spray pipe is provided in the spray chamber, the second spray pipe is connected to a second spray pump, and the water inlet of the second spray pump is connected to a circulating water tank.

[0024] The beneficial effects of adopting the above technical solution are:

[0025] This utility model is designed to address the characteristics of particulate matter in leather spraying exhaust gas, which has a certain viscosity and is difficult to rewet. It combines the principles of wet dust removal and centrifugal dust removal. Under working conditions, the spokes of the centrifugal wheel hit the dust airflow and water mist at high speed, making them fully integrated. At the same time, some of the formed dust-containing water droplets are thrown out under the action of centrifugal force and flow back to the circulating water tank along the wall of the device. The particulate matter is wetted and dissolved, which can also greatly reduce the viscosity of the particulate matter. After the exhaust gas and water mist passing through the installation hole are fully stirred by the high-speed rotating centrifugal wheel, they are then sprayed for the second time and the packing layer under the action of negative pressure gravity. The dust-containing water mist and spray water are combined and fall along the water flow to separate from the gas, thereby improving the dust removal effect of the spraying exhaust gas.

[0026] The utility model provides a negative pressure fan on the upper side of the shell, and a partition is provided on the upper side of the pre-wet dust removal cavity, the partition divides the pre-wet dust removal cavity into two upper and lower cavities, a mounting hole is provided on the partition, a centrifugal impeller is provided in the mounting hole, and the air inlet is provided on the lower side of the partition, and the negative pressure fan forms the function of inducing wind, and after the dust-laden exhaust gas enters the pre-wet dust removal cavity through the air inlet, the dust-laden exhaust gas rises to above the partition through the mounting hole under the leading action of the negative pressure fan, and when passing through the mounting hole, the high-speed rotating centrifugal impeller further disperses the water mist, stirs it evenly, and makes it fully contact and fuse with the dust-laden gas, and partially formed water droplets are thrown out under the action of centrifugal force, and the dust-laden gas that has not formed water droplets is stirred and evenly distributed, and then subjected to secondary spraying, activated carbon adsorption and other treatments before being discharged through the air outlet.

[0027] The upper parts of both sides of the box of the utility model are air outlet holes to form a bypass structure. The dust-containing exhaust gas after preliminary treatment passes through the filler layer, spray chamber, and activated carbon adsorption layer in turn, and is discharged through the air outlet after subsequent treatment. Since the dust-containing exhaust gas is effectively treated in the pre-wetting dust removal chamber and other front-ends, the initial dust removal effect is guaranteed, the pressure of subsequent filtering and dust removal is effectively reduced, the frequency of filter replacement is reduced, the use cost is reduced, and the solid waste generated is reduced.

[0028] A circulating water tank is provided at the lower side of the pre-wetting cavity of the utility model. The circulating water tank is used to collect circulating water at the bottom. The exhaust gas brought in by the lower induced wind goes up and meets the spray water at the upper part. Under the action of the induced wind, the exhaust gas enters the pre-wetting dust removal cavity at the same time. The spray water is sprayed by multiple evenly distributed atomizing nozzles, which has a good atomization effect on the water, and the amount of water can be adjusted according to the concentration of particulate matter in the exhaust gas and the difficulty of wetting.

[0029] A centrifugal wheel is arranged in the pre-wetting dust removal chamber of the utility model, and a driving motor drives the centrifugal wheel to rotate, and the top negative pressure is adopted in combination, so the whole device has good coordination and can process high standard flow of waste gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the structure of the utility model

[0031] Figure 2 This is a schematic diagram of the internal structure of the pre-wet dust removal chamber of the utility model;

[0032] Figure 3 This is a schematic diagram of the centrifugal wheel structure of the utility model;

[0033] Among them, 1. Shell, 2. Pre-wet dust removal chamber, 201. First spray pipe, 202. First spray water pump, 3. Circulating water tank, 4. Centrifugal wheel, 5. Packing layer, 6. Spray chamber, 601. Second spray pipe, 602. Second spray pump, 7. Negative pressure fan, 8. Activated carbon adsorption layer, 9. Air outlet, 10. Drive motor, 11. Partition, 12. Mounting hole, 13. Rim, 14. Hub, 15. Spoke, 16. Air guide cover, 17. Negative pressure chamber, 18. Air inlet, 19. Filter layer. DETAILED DESCRIPTION

[0034] The present invention will be further described below with reference to the accompanying drawings.

[0035] As attached Figure 1-3As shown, this embodiment provides a wet centrifugal dust removal device for leather spraying exhaust gas, which includes a shell 1, a pre-wet dust removal cavity 2 arranged on the lower side of the shell 1, and a circulating water tank 3 arranged on the lower side of the pre-wet dust removal cavity 2; a circulating water tank 3 is arranged on the lower side of the pre-wet cavity, and the circulating water tank 3 is used to collect circulating water at the bottom. The exhaust gas brought in by the lower induced wind goes up and meets the upper spray water. Under the action of the induced wind, it enters the pre-wet dust removal cavity at the same time. The spray water is sprayed by multiple evenly distributed atomizing nozzles, which has a good atomization effect on water, and the amount of water can be adjusted according to the concentration of particulate matter in the exhaust gas and the difficulty of wetting. An air inlet 18 is provided on the pre-wet dust removal chamber 2. A drive motor 10 is fixedly provided on the upper side of the pre-wet dust removal chamber 2, and a centrifugal wheel 4 is provided on the lower side of the drive motor 10. A partition 11 is provided on the upper side of the pre-wet dust removal chamber 2. The partition 11 is located above the air inlet 18 and divides the wet dust removal chamber 2 into two upper and lower chambers. A mounting hole 12 is provided on the partition 11, and the centrifugal wheel 4 is provided in the mounting hole 12. A deflector 16 is provided above the mounting hole 12 to guide airflow through the mounting hole 12. The centrifugal wheel 4 includes a rim 13 provided in the mounting hole 12, and a spoke 15 connected to the drive motor and the rim 13 and the hub 14. The rim 13 coincides with the centerline of the mounting hole 12, and the spoke 15 is perpendicular to the output shaft of the drive motor 10. The thickness of the spoke 15 is 1 to 40 cm. A negative pressure fan 7 is provided on the upper side of the shell 1; an atomizing spray device is provided in the pre-wet dust removal chamber 2; and the centrifugal wheel 4 is provided above the atomizing spray device. The atomizing spray device includes a first spray pipe 201 provided in the pre-wet dust removal chamber 2 and a first spray water pump 202 connected to the first spray pipe 201, and the water inlet of the first spray water pump 202 is connected to the circulating water tank 3; an atomizing nozzle is provided on the first spray pipe 201, and the atomizing nozzle port is provided upward; the centrifugal wheel 4 is provided above the first spray pipe 201. The present utility model is aimed at the characteristics that particulate matter in the leather spraying exhaust gas has a certain viscosity and is difficult to rewet. Combining the principles of wet dust removal and centrifugal dust removal, in working state, the spokes of the centrifugal wheel hit the dust airflow and water mist under high-speed rotation, so that they are fully integrated, and at the same time, some of the formed dust-containing water droplets are thrown out under the action of centrifugal force and flow back to the circulating water tank along the wall of the device. The particles are moistened and dissolved, which can greatly reduce the viscosity of the particles. The exhaust gas and water mist passing through the installation hole are fully stirred by the high-speed rotating centrifugal wheel 4, and then pass through the second spraying and filler layer under the action of negative pressure gravity, so that the dust-containing water mist and spray water are combined with the water flow and separated from the gas, thereby improving the effect of dust removal on spray exhaust gas.

[0036] A packing layer 5 is provided above the pre-wet dust removal chamber 2, and the packing layer 5 is made of polyhedral spherical packing. A spray chamber 6 is provided above the packing layer 5. A second spray pipe 601 is provided in the spray chamber 6, and the second spray pipe 601 is connected to a second spray pump 602. The water inlet of the second spray pump 602 is connected to the circulating water tank 3. A filter layer 19 is provided above the spray chamber 6, and a negative pressure chamber 17 is provided above the filter layer 19. The negative pressure fan 7 is provided in the negative pressure chamber 17. An activated carbon adsorption layer 8 is provided above the negative pressure chamber 17. An air outlet 9 is provided above the activated carbon adsorption layer 8. The upper portions of both sides of the housing of the utility model are formed into a bypass structure with air outlets. The packing layer 5, spray chamber 6, filter layer 19, negative pressure chamber 17, activated carbon adsorption layer 8, and air outlet 9 are provided in sequence above the pre-wet dust removal chamber 2. The negative pressure fan 7 is provided in the negative pressure chamber 17. The dust-containing exhaust gas after preliminary treatment then passes through the packing layer 5, the spray chamber 6, the filter layer 19, and the activated carbon adsorption layer 8 in sequence, and is discharged through the air outlet 9 after subsequent treatment. Since the dust-containing exhaust gas is effectively treated in the pre-wetting dust removal chamber and other front-ends, the preliminary dust removal effect is guaranteed, the pressure of subsequent filtering and dust removal is effectively reduced, the frequency of filter replacement is reduced, the use cost is reduced, and the solid waste generated is reduced.

[0037] The working principle of this utility model is described as follows:

[0038] The utility model is provided with a partition 11 on the upper side of the pre-wet dust removal chamber 2, and the partition 11 is located on the upper side of the air inlet 18. The partition 11 divides the wet dust removal chamber 2 into two cavities, an upper and a lower cavity, and a mounting hole 12 is provided on the partition 11. A centrifugal wheel 4 is provided in the mounting hole 12, and a guide cover 16 is provided above the mounting hole 12 to guide the air flow through the mounting hole 12. The utility model is mainly aimed at the characteristics that the particulate matter in the leather spraying exhaust has a certain viscosity and is difficult to rewet. It combines wet dust removal and centrifugal The dust removal principle is that when it is in operation, the exhaust gas enters from the air inlet 18 and is sprayed by the atomizing nozzle on the first spray pipe 201. Under the drainage action of the upper negative pressure fan 7 and the deflector 16, the dust-laden exhaust gas and water mist pass through the mounting hole 12 and enter the upper cavity. When passing through the mounting hole 12, the spokes 15 of the centrifugal wheel 4 rotate at high speed and hit the dust-laden airflow and water mist, making them fully integrated. At the same time, some of the formed dust-laden water droplets are thrown out under the action of centrifugal force and flow back to the circulating water tank along the wall. The particles are wetted and dissolved, which can also greatly reduce the viscosity of the particles. After the exhaust gas and water mist passing through the mounting hole are fully mixed by the high-speed rotating centrifugal wheel 4, they pass through the second spraying and packing layer under the action of negative pressure gravity, so that the dust-laden water mist and the spray water are combined, fall down with the water flow and are separated from the gas, further improving the dust removal effect of the spraying exhaust gas.

[0039] A centrifugal wheel 4 is provided in the pre-wetting dust removal chamber of the present invention, and a driving motor 10 drives the centrifugal wheel 4 to rotate. The top negative pressure is adopted in conjunction with the centrifugal wheel 4, and the whole device has good coordination and can process high standard flow of waste gas.

[0040] The upper part of both sides of the box body is an air outlet to form a bypass structure. The dust-containing exhaust gas after preliminary treatment passes through the packing layer 5, the spray chamber 6, and the activated carbon adsorption layer 8 in turn, and is discharged through the air outlet 9 after subsequent treatment. Since the dust-containing exhaust gas is effectively treated in the pre-wetting dust removal chamber and other front-ends, the initial dust removal effect is guaranteed, which effectively reduces the pressure of subsequent filtering and dust removal, reduces the frequency of filter replacement, reduces the cost of use, and reduces the solid waste generated.

[0041] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A wet centrifugal dust removal device for leather spraying waste gas, characterized in that: It comprises a shell (1), a pre-wet dust removal cavity (2) arranged on the lower side of the shell (1), and a circulating water tank (3) arranged on the lower side of the pre-wet dust removal cavity (2); An air inlet (18) is provided on the pre-wet dust removal cavity (2); A driving motor (10) is fixedly arranged on the upper side of the pre-wet dust removal chamber (2), and a centrifugal wheel (4) is arranged on the lower side of the driving motor (10); A negative pressure fan (7) is provided on the upper side of the housing (1); An atomizing spray device is provided in the pre-wetting dust removal cavity (2); The centrifugal wheel (4) is arranged above the atomizing spray device.

2. A wet centrifugal dust removal device for leather spraying waste gas according to claim 1, characterized in that: The atomizing spray device comprises a first spray pipe (201) arranged in the pre-wetting dust removal cavity (2) and a first spray water pump (202) connected to the first spray pipe (201), wherein the water inlet of the first spray water pump (202) is connected to the circulating water tank (3); An atomizing nozzle is provided on the first spray pipe (201), and the atomizing nozzle opening is arranged upward; The centrifugal wheel (4) is arranged above the first spray pipe (201).

3. The wet centrifugal dust removal device for leather spraying waste gas according to claim 1, characterized in that: A partition (11) is provided on the upper side of the pre-wetting dust removal chamber (2), the partition (11) is located on the upper side of the air inlet (18), a mounting hole (12) is provided on the partition (11), and a centrifugal wheel (4) is provided in the mounting hole (12).

4. A wet centrifugal dust removal device for leather spraying waste gas according to claim 3, characterized in that: A flow guide cover (16) is provided above the mounting hole (12).

5. The wet centrifugal dust removal device for leather spraying waste gas according to claim 3, characterized in that: The centrifugal wheel (4) comprises a rim (13) disposed in a mounting hole (12), a hub (14) connected to an output shaft of the drive motor (10), and spokes (15) connecting the rim (13) and the hub (14).

6. A wet centrifugal dust removal device for leather spraying waste gas according to claim 5, characterized in that: The wheel rim (13) coincides with the center line of the mounting hole (12).

7. The wet centrifugal dust removal device for leather spraying waste gas according to claim 5, characterized in that: The wheel spokes (15) are perpendicular to the output shaft of the drive motor (10).

8. The wet centrifugal dust removal device for leather spraying waste gas according to claim 5, characterized in that: The thickness of the spoke (15) is 1 to 40 cm.

9. The wet centrifugal dust removal device for leather spraying waste gas according to claim 1, characterized in that: A packing layer (5), a spray chamber (6), a filter layer (19), a negative pressure chamber (17), an activated carbon adsorption layer (8), and an air outlet (9) are sequentially arranged above the pre-wet dust removal chamber (2); The negative pressure fan (7) is arranged in the negative pressure chamber (17).

10. The wet centrifugal dust removal device for leather spraying waste gas according to claim 9, characterized in that: A second spray pipe (601) is provided in the spray chamber (6), the second spray pipe (601) is connected to a second spray pump (602), and the water inlet of the second spray pump (602) is connected to the circulating water tank (3).

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