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

Abstract

The invention 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 device has the characteristics of high dust removal efficiency, simple structure and capability of reducing the subsequent filtering dust removal pressure.

Description

Technical Field

[0001] The invention 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] At present, the spraying waste gas dust removal adopted in the leather industry is a combination of wet dust removal and filtration dust removal. Due to the diversity of particle size and physical properties in the spraying waste gas, in order to achieve the ideal dust removal effect, multi-stage wet dust removal and complex structure design must be adopted to enhance the dust removal effect. Even so, there are still many particles that need to be filtered and dust removed. If the dust removal effect of the previous process is not ideal, it will bring great pressure to the filtration dust removal, resulting in high frequency of filter replacement and a lot of solid waste.

[0003] A centrifuge is a mechanical device that uses centrifugal force to separate substances. The principle of a centrifuge is that under the action of centrifugation, different substances are placed in different positions according to their density, viscosity, particle size, shape and other properties, thereby achieving the purpose of separation and filtration. It is generally believed that centrifuges are mainly suitable for the separation and filtration of liquids, and are often used in the fields of fine chemicals, pharmaceuticals, food and beverages, sewage treatment, etc., and cannot be used for dust removal of spray exhaust gas. Summary of the invention

[0004] The technical problem to be solved by the present invention 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, thereby retaining the advantages of wet dust removal and centrifugal separation and overcoming their disadvantages, having high dust removal efficiency, simple structure and reducing the pressure of post-filtration dust removal.

[0005] In order to achieve the above technical problems, the technical solution adopted by the present invention is: A wet centrifugal dust removal device for leather spraying waste gas, comprising a housing, a pre-wet dust removal cavity arranged at the lower side of the housing, and a circulating water tank arranged at the lower side of the pre-wet dust removal cavity; An air inlet is arranged on the pre-wet dust removal cavity; 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; A negative pressure fan is arranged on the upper side of the housing; An atomizing spray device is arranged in the pre-wetting dust removal cavity; The centrifugal wheel is arranged above the atomizing spray device.

[0006] Furthermore, the atomizing spray device includes a first spray pipe disposed in the pre-wetting dust removal cavity and a first spray water pump connected to the first spray pipe, and a water inlet of the first spray water pump is connected to a circulating water tank; The first spray pipe is provided with an atomizing nozzle, and the atomizing nozzle opening is arranged upward; The centrifugal wheel is arranged above the first spray pipe.

[0007] Furthermore, a partition is arranged on the upper side of the pre-wet dust removal chamber, the partition is located on the upper side of the air inlet, a mounting hole is arranged on the partition, and a centrifugal wheel is arranged in the mounting hole.

[0008] Furthermore, a deflector cover is arranged above the mounting hole.

[0009] Furthermore, the centrifugal wheel includes a wheel rim arranged in the mounting hole, a hub connected to the output shaft of the driving motor, and spokes connecting the wheel rim and the hub.

[0010] Furthermore, the center line of the wheel rim coincides with the center line of the mounting hole.

[0011] Furthermore, the spokes are perpendicular to the output shaft of the driving motor.

[0012] Furthermore, the spoke has a thickness of 1 to 40 cm.

[0013] Furthermore, a packing 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; The negative pressure fan is arranged in the negative pressure chamber.

[0014] Furthermore, a second spray pipe is arranged in the spray chamber, the second spray pipe is connected to a second spray pump, and a water inlet of the second spray water pump is connected to a circulating water tank.

[0015] The beneficial effects of adopting the above technical solution are: The present invention is aimed at the characteristics that the particles in the leather spraying waste gas have a certain viscosity and are 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 under high-speed rotation to fully merge them. At the same time, the dust-containing water droplets formed 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 wetted and dissolved, which can greatly reduce the viscosity of the particles. After the exhaust gas and water mist passing through the installation hole are fully stirred by the high-speed rotating centrifugal wheel, they pass through the second spraying and packing layer under the action of negative pressure gravity, so that the dust-containing water mist and the spraying water are combined with the water flow to fall and separate from the gas, thereby improving the effect of dust removal on the spraying waste gas.

[0016] A negative pressure fan is arranged on the upper side of the shell of the present invention, and a partition is arranged 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 arranged on the partition, a centrifugal wheel is arranged in the mounting hole, and an air inlet is arranged on the lower side of the partition, the negative pressure fan forms an air induction effect, after the dust-containing exhaust gas enters the pre-wet dust removal cavity through the air inlet, under the leading action of the negative pressure fan, the dust-containing exhaust gas rises to above the partition through the mounting hole, when passing through the mounting hole, the high-speed rotating centrifugal wheel further fully disperses the water mist, fully stirs it, makes it fully contact and fuse with the dust-containing gas, most of the formed dust-containing water mist is thrown out under the action of centrifugal force, and a small amount of dust that is not removed in the exhaust gas is further treated by secondary spraying, activated carbon adsorption, etc., and then discharged through the air outlet.

[0017] The upper parts of both sides of the box body of the present invention are air outlets to form a bypass structure. The dust-containing exhaust gas after preliminary treatment passes through the packing layer, spray chamber, filter mesh layer, 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.

[0018] A circulating water tank is arranged at the lower side of the pre-wetting cavity of the present invention, and 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, and enters the pre-wetting dust removal cavity at the same time under the action of the induced wind. The spray water is sprayed by a plurality of 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.

[0019] A centrifugal wheel is arranged in the pre-wetting dust removal chamber of the present invention, and a driving motor drives the centrifugal wheel to rotate, and the top negative pressure is adopted in coordination, so the whole device has good coordination and can process high standard flow rate of waste gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the structure of the present invention Figure 2 This is a schematic diagram of the internal structure of the pre-wet dust removal chamber of the present invention; Figure 3 It is a schematic diagram of the centrifugal wheel structure of the present invention; 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. guide cover, 17. negative pressure chamber, 18. air inlet, 19. filter layer. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] As attached Figure 1-3 As 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 chamber 2 arranged at the lower side of the shell 1, and a circulating water tank 3 arranged at the lower side of the pre-wet dust removal chamber 2. The circulating water tank 3 is used to collect circulating water at the bottom, and the exhaust gas brought in by the lower induced wind goes up and meets the upper spray water, and under the action of the induced wind, enters the pre-wet dust removal chamber 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 arranged on the pre-wet dust removal chamber 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 partition 11 is arranged on the upper side of the pre-wet dust removal chamber 2, the partition 11 is located on the upper side of the air inlet 18, and the partition 11 divides the pre-wet dust removal chamber 2 into two upper and lower chambers, a mounting hole 12 is arranged on the partition 11, a centrifugal wheel 4 is arranged in the mounting hole 12, and a guide cover 16 is arranged above the mounting hole 12 to guide the airflow to pass through the mounting hole 12. The centrifugal wheel 4 includes a rim 13 arranged in the mounting hole 12, and a spoke 15 connected to the driving motor 10 and the rim 13 and the hub 14, the rim 13 coincides with the center line of the mounting hole 12, the spoke 15 is perpendicular to the output shaft of the driving motor 10, and the thickness of the spoke 15 is 1 to 40 cm. A negative pressure fan 7 is arranged on the upper side of the shell 1; an atomizing spray device is arranged in the pre-wetting dust removal chamber 2; and the centrifugal wheel 4 is arranged above the atomizing spray device. The atomizing spray device includes a first spray pipe 201 arranged in the pre-wetting 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 arranged on the first spray pipe 201, and the centrifugal wheel 4 is arranged above the first spray pipe 201. The present invention is aimed at the characteristics that the particulate matter in the leather spraying exhaust gas has a certain viscosity and is difficult to rewet, and 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 under high-speed rotation to fully merge them, and at the same time, the partially 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 packing layer under the action of negative pressure gravity, so that the dust-containing water mist and spraying water combine to fall down with the water flow and separate from the gas, thereby improving the effect of dust removal on spray exhaust gas.

[0023] A packing layer 5 is arranged above the pre-wet dust removal chamber 2, and the packing layer 5 is a polyhedral ball packing; a spray chamber 6 is arranged above the packing layer 5; a second spray pipe 601 is arranged in the spray chamber 6, and the second spray pipe 601 is connected to the second spray pump 602, and the water inlet of the second spray water pump 602 is connected to the circulating water tank 3. A filter mesh layer 19 is arranged above the spray chamber 6, a negative pressure chamber 17 is arranged above the filter mesh layer 19, and the negative pressure fan 7 is arranged in the negative pressure chamber 17; an activated carbon adsorption layer 8 is arranged above the negative pressure chamber 17; and an air outlet 9 is arranged above the activated carbon adsorption layer 8. The upper parts of both sides of the box of the present invention are bypass-type structures formed by air outlets, and a packing layer 5, a spray chamber 6, a filter mesh layer 19, a negative pressure chamber 17, an activated carbon adsorption layer 8 and an air outlet 9 are arranged in sequence above the pre-wet dust removal chamber 2; the negative pressure fan 7 is arranged 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 mesh layer 19, 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 preliminary 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.

[0024] The working principle of the present invention is described as follows: The partition 11 is arranged on the upper side of the pre-wet dust removal chamber 2 of the present invention, and the partition 11 is located on the upper side of the air inlet 18. The partition 11 divides the pre-wet dust removal chamber 2 into two upper and lower chambers. The partition 11 is provided with a mounting hole 12, and a centrifugal wheel 4 is arranged in the mounting hole 12. A guide cover 16 is arranged above the mounting hole 12 to guide the airflow to pass through the mounting hole 12. The present invention mainly aims at the characteristics that the particles in the leather spraying waste gas have a certain viscosity and are difficult to rewet, and combines wet dust removal and centrifugal dust removal. According to the dust removal principle, in the working state, 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 effect of the upper negative pressure fan 7 and the guide cover 16, the dust-containing exhaust gas and water mist pass through the installation hole 12 and enter the upper cavity. When passing through the installation hole 12, the spokes 15 of the centrifugal wheel 4 rotate at high speed to hit the dust airflow and water mist, 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. The particles are wetted and dissolved, which can greatly reduce the viscosity of the particles. After the exhaust gas and water mist passing through the installation hole are fully stirred by the high-speed rotating centrifugal wheel 4, they pass through the second spray and the packing layer under the action of negative pressure gravity, so that the dust-containing water mist and the spray water are combined, fall down with the water flow and separate from the gas, further improving the effect of dust removal on the spraying exhaust gas.

[0025] A centrifugal wheel 4 is arranged 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 coordination, and the whole device has good coordination and can process high standard flow rate of waste gas.

[0026] The upper part of both sides of the box body is a bypass structure with air outlets. 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.

[0027] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be 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 will not be limited to the embodiments shown herein, but rather 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-wetting dust removal cavity (2) arranged at the lower side of the shell (1), and a circulating water tank (3) arranged at the lower side of the pre-wetting dust removal cavity (2); An air inlet (18) is provided on the pre-wet dust removal chamber (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 arranged on the upper side of the housing (1); An atomizing spray device is arranged in the pre-wetting dust removal cavity (2); The centrifugal wheel (4) is arranged above the atomizing spray device.

2. A wet 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); The first spray pipe (201) is provided with an atomizing nozzle; The centrifugal wheel (4) is arranged above the first spray pipe (201).

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

5. The wet centrifugal dust removal device for leather spraying waste gas according to claim 3 is characterized in that: The centrifugal wheel (4) comprises a wheel rim (13) arranged in a mounting hole (12), a wheel hub (14) connected to an output shaft of the drive motor (10), and a wheel spoke (15) connecting the wheel rim (13) and the wheel 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 spoke (15) has a thickness of 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 8, characterized in that: A second spray pipe (601) is arranged in the spray chamber (6); the second spray pipe (601) is connected to a second spray pump (602); and a water inlet of the second spray pump (602) is connected to a circulating water tank (3).

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