Dust removal device

Abstract

A dust removal device comprises a cyclone separator and a speed reduction device connected with the cyclone separator, the speed reduction device comprises a cavity and a speed reduction pore plate located in the cavity, the speed reduction pore plate is used for reducing the gas flow rate and blocking part of solids, the cavity is provided with a gas inlet and a gas outlet, and the gas inlet is communicated with the gas outlet. Gas enters the cavity from the gas inlet, passes through the speed reduction pore plate and then flows into the cyclone separator from the gas outlet. And by additionally arranging the speed reducing device, the gas-solid separation effect of the cyclone separator is improved, the separation efficiency is improved, and meanwhile, the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering machinery, and more specifically to the technical field of gas-solid separation. Background Art

[0002] A dust removal device is a device used to control and reduce dust pollution generated during industrial production. It is widely used in many industries to protect the environment and workers' health. The principle of a dust removal device is to remove solid particles from the airflow through various physical or chemical methods to achieve gas-solid separation. Common dust removal technologies include mechanical dust removal, wet dust removal, and dry dust removal. Among them, a mechanical dust collector separates dust from gas by centrifugal force, gravity, or inertial force. For example, the Chinese patent with patent number CN207286930 U discloses a cyclone separator. When the gas to be separated enters the cyclone separator, due to the action of the rotating airflow, the particles with higher density in the cyclone separator are thrown toward the shell wall, and move downward along the wall under the action of centrifugal force, and finally discharged through the slag discharge port of the separator. The purified gas flows out from the center of the separator and is discharged or further processed through the outlet pipe.

[0003] The cyclone separator has the advantages of simple structure, large gas processing volume, stable operation and low cost, and has been widely used in chemical, building materials, electric power, metallurgy and other industries. However, due to the strong airflow movement inside the cyclone separator, the particles constantly impact the inner wall, which will cause wear of the cylinder wall and the discharge port, and need to be replaced or repaired regularly, increasing the operating cost. In addition, when the airflow entering the cyclone separator is too large or there are too many impurities, a small amount of solids will flow out through the outlet pipe along with the gas, and the separation effect is not good. Utility Model Content

[0004] The utility model aims to provide a dust removal device which can extend the service life of the device and improve the separation efficiency while performing gas-solid separation.

[0005] The utility model is realized through the following technical solutions:

[0006] A dust removal device includes a cyclone separator, characterized in that it also includes a speed reduction device connected to the cyclone separator, the speed reduction device includes a cavity and a speed reduction orifice plate located inside the cavity, the speed reduction orifice plate is used to reduce the gas flow rate and block some solids, the cavity is provided with an air inlet and an air outlet, the gas enters the cavity from the air inlet, and flows into the cyclone separator from the air outlet after passing through the speed reduction orifice plate.

[0007] The gas mixture with solid impurities such as dust first enters the cavity through the air inlet, and then flows into the cyclone separator from the air outlet after passing through the deceleration orifice plate. Some solid impurities with larger volume are blocked by the deceleration orifice plate and fall to the lower end of the cavity. The dust removal device improves the gas-solid separation effect of the cyclone separator by adding a deceleration device, improves the separation efficiency and prolongs the service life. It is mainly reflected in the following aspects: 1. The cyclone separator is a device that uses the centrifugal force generated by the rotating airflow to separate solid particles from gas. When the gas-solid mixture enters the cyclone separator through the inlet, the gas rotates at a high speed inside the cyclone. Due to the centrifugal force, the solid is thrown to the wall of the device, and settles after colliding with the wall of the device, and finally discharged through the discharge port. The gas-solid mixture is decelerated by the deceleration device before entering the cyclone separator, which can increase the residence time of the gas inside the cyclone, so that the solid has enough time to collide with the wall of the device and settle, thereby improving the separation efficiency. In addition, at a lower flow rate, the carrying capacity of the gas is weakened, which is conducive to the sedimentation of solids, reduces the possibility of solids being discharged with the gas, and improves the separation efficiency. 2. The speed reduction orifice plate performs preliminary separation of larger particles of solid impurities, effectively preventing these particles from entering the cyclone separator. This not only improves the separation efficiency, but also protects the inside of the cyclone separator from the impact of large particles, extending the service life of the equipment. By adding a speed reduction device, the cyclone separator can work under better conditions, improve the gas-solid separation effect, and reduce equipment loss. The speed reduction device also makes the pressure distribution inside the cyclone separator more uniform, improving the stability and reliability of the equipment.

[0008] As a preferred embodiment of the present invention, the speed reduction orifice plate comprises a plate wall and a speed reduction hole, and the aperture of the speed reduction hole increases along the gas flow direction.

[0009] The aperture of the speed reduction hole increases with the gas flow direction, which can prevent solid impurities from getting stuck inside the speed reduction hole and affecting gas-solid separation.

[0010] As a preferred embodiment of the present invention, the cavity is funnel-shaped, and the plate wall is perpendicular to the flow direction of the airflow and fits the cavity.

[0011] The cavity is arranged in a funnel shape to facilitate the collection of blocked solid impurities. In addition, the plate wall is perpendicular to the flow direction of the airflow and fits the cavity, so that the speed reduction orifice plate can be engaged, which not only fixes the speed reduction orifice plate but also facilitates the replacement of the speed reduction orifice plate at a later stage.

[0012] As a preferred embodiment of the present invention, the cyclone separators are provided with more than two, and are internally connected via a connecting pipe, and the connecting pipe is a U-shaped pipe.

[0013] The connecting pipe is a U-shaped pipe, which plays a role in reducing the speed and preventing the gas from entering the next cyclone separator too fast and affecting the separation efficiency. By increasing the number of cyclone separators, multi-stage separation can be performed to improve the purity of the separated gas. Engineers can flexibly set the number of cyclone separators according to the actual impurity properties and airflow size.

[0014] As a preferred embodiment of the present invention, a plurality of the speed reduction orifice plates are provided, and the speed reduction holes on adjacent speed reduction orifice plates are spatially staggered.

[0015] Through the staggered distribution of speed reduction holes, the flow paths of gas and materials become more tortuous. This design can effectively reduce the gas flow rate while improving the efficiency of gas-solid separation.

[0016] As a preferred embodiment of the utility model, the speed reduction holes of the same speed reduction orifice plate have the same size, and the apertures of the speed reduction holes on different speed reduction orifice plates decrease along the gas flow direction.

[0017] This design can achieve step-by-step separation, improve separation efficiency and extend the replacement time of the speed reduction orifice plate.

[0018] As a preferred embodiment of the present invention, the cyclone separator is located on the upper side of the speed reduction device.

[0019] The cyclone separator is located on the upper side of the speed reduction device, which can further reduce the gas flow rate entering the cyclone separator, thereby improving the separation efficiency.

[0020] As a preferred embodiment of the present invention, a rotary discharger is connected below the cyclone separator and the speed reduction device.

[0021] The rotary unloader is a commonly used mechanical unloading device for powdery, granular or small block materials. Its working principle is to feed the material from one end through the rotating device, and then use the rotating force to push the material evenly to the discharge port to achieve continuous unloading of the material.

[0022] In summary, the utility model has the following beneficial effects:

[0023] 1. By adding a speed reduction device, the gas-solid separation effect of the cyclone separator is improved, the separation efficiency is increased and the service life is extended.

[0024] 2. By increasing the number of cyclone separators, multi-stage separation can be performed to improve the purity of the separated gas.

[0025] 3. The connecting pipe is a U-shaped pipe, which plays a role in reducing the speed and preventing the gas from entering the next cyclone separator too fast and affecting the separation efficiency.

[0026] 4. There are multiple deceleration orifice plates, and the deceleration holes on adjacent deceleration orifice plates are staggered in spatial position. Through the staggered distribution of deceleration holes, the flow path of gas and material becomes more tortuous. This design can effectively reduce the gas flow rate while improving the efficiency of gas-solid separation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the dust removal device;

[0028] Figure 2 It is a schematic diagram of the structure of the speed reduction device;

[0029] Figure 3 Schematic diagram of the speed reduction hole structure.

[0030] In the figure: 1. cyclone separator, 2. speed reduction device, 21. cavity, 22. air inlet, 23. air outlet, 24. speed reduction orifice plate, 241. plate wall, 242. speed reduction hole, 3. connecting pipe, 4. rotary discharger. DETAILED DESCRIPTION

[0031] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0032] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

[0033] like Figure 1 , 2 As shown, a dust device comprises a deceleration device 2 and a cyclone separator 1 which are connected in sequence. The deceleration device comprises a cavity 21, an air inlet 22, an air outlet 23 and a deceleration orifice plate 24 located inside the cavity 21. The cavity 21 is funnel-shaped, and the shape of the deceleration orifice plate 24 matches the shape of the cavity 21, so that the deceleration orifice plate 24 can completely fit and engage with the inner wall of the cavity 21. In addition, the design of the shape of the cavity 21 not only facilitates engagement with the deceleration orifice plate 24, but also facilitates the collection of blocked solid impurities to smoothly enter the rotary discharger 4. The specific flow direction of the gas is as follows: the gas mixture containing solid impurities such as dust first enters the cavity through the air inlet 21, and then flows from the air outlet 23 into the cyclone separator 1 located above the deceleration device 2 after passing through the deceleration orifice plate 24. Among them, as Figure 3As shown, the deceleration orifice plate 24 includes a plate wall 241 and a deceleration hole 242. Some larger solid impurities are blocked by the plate wall 241 and fall into the rotary discharger 4 at the lower end of the cavity 21. The remaining gas and a small amount of impurities have a reduced flow rate due to friction after passing through the deceleration hole 242, and enter the cyclone separator 1 through the air outlet 23 for further gas-solid separation. The aperture of the deceleration hole 242 increases with the flow direction of the gas, which can prevent solid impurities from getting stuck inside the deceleration hole 242 and affecting gas-solid separation. The rotary discharger 4 is a commonly used mechanical unloading device for powdery, granular or small block materials. Its working principle is to feed the material from one end through a rotating device, and then use the rotating force to evenly push the material to the discharge port to achieve continuous unloading of the material.

[0034] The dust removal device improves the gas-solid separation effect of the cyclone separator 1 by adding a deceleration device 2, improves the separation efficiency and prolongs the service life. It is mainly reflected in the following aspects: 1. The gas mixture is decelerated by the deceleration device 2 before entering the cyclone separator 1, avoiding the reduction of the separation effect due to excessive flow rate. This enables the cyclone separator 1 to work at a lower flow rate and improves the separation efficiency. 2. The deceleration orifice plate 24 performs preliminary separation of larger particles of solid impurities, effectively preventing these particles from entering the cyclone separator 1. This not only improves the separation efficiency, but also protects the inside of the cyclone separator 1 from the impact of large particles, thereby extending the service life of the equipment. By adding a deceleration device 2, the cyclone separator 1 can work under better conditions, improve the gas-solid separation effect, and reduce equipment loss. And the deceleration device 2 makes the internal pressure distribution of the cyclone separator 1 more uniform, improving the stability and reliability of the equipment. In addition, setting the cavity 21 into a funnel shape can facilitate the collection of blocked solid impurities, allowing them to smoothly enter the rotary discharger 4, and can also engage the speed reduction orifice plate 24, which not only fixes the speed reduction orifice plate 24 but also facilitates the later replacement of the speed reduction orifice plate 24.

[0035] As another preferred embodiment of the present invention, two cyclone separators 1 are provided, and the two cyclone separators 1 are internally connected through a connecting pipe 3. The connecting pipe 3 is a U-shaped pipe, which plays a role of reducing speed, preventing the gas from entering the next cyclone separator 1 too fast and affecting the separation efficiency. By increasing the number of cyclone separators 1, multi-stage separation can be performed to improve the purity of the separated gas. Engineers can flexibly set the number of cyclone separators 1 according to the actual impurity properties and airflow size.

[0036] As another preferred embodiment of the present invention, a plurality of deceleration orifice plates 24 are provided, and the deceleration holes 242 on adjacent deceleration orifice plates 24 are spatially staggered. Through the staggered distribution of deceleration holes 242, the flow path of gas and material becomes more tortuous, and such a design can effectively reduce the gas flow rate while improving the efficiency of gas-solid separation. In addition, the deceleration holes 242 of the same deceleration orifice plate 24 are of the same size, and the aperture of the deceleration holes 242 on the deceleration orifice plate 24 decreases with the different gas flow directions. Such a design can achieve step-by-step separation, improve the separation efficiency, and extend the replacement time of the deceleration orifice plate 24.

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A dust removal device, comprising a cyclone separator (1), characterized in that: The invention also comprises a deceleration device (2) connected to the cyclone separator (1), the deceleration device comprising a cavity (21) and a deceleration orifice plate (24) located inside the cavity (21), the deceleration orifice plate (24) being used to reduce the gas flow rate and block part of the solids, the cavity (21) being provided with an air inlet (22) and an air outlet (23), the gas-solid mixture enters the cavity (21) from the air inlet (22), and flows into the cyclone separator (1) from the air outlet (23) after passing through the deceleration orifice plate (24).

2. A dust removal device according to claim 1, characterized in that: The speed reduction orifice plate (24) comprises a plate wall (241) and a speed reduction hole (242) provided on the plate wall (241), wherein the aperture of the speed reduction hole (242) increases along the gas flow direction.

3. A dust removal device according to claim 2, characterized in that: The cavity (21) is funnel-shaped, the extension direction of the plate wall (241) is perpendicular to the flow direction of the airflow, and the plate wall (241) fits the cavity (21).

4. A dust removal device according to claim 2, characterized in that: A plurality of the speed reduction orifice plates (24) are provided, and the speed reduction holes (242) on adjacent speed reduction orifice plates (24) are spatially staggered.

5. A dust removal device according to claim 4, characterized in that: The speed reduction holes (242) of the same speed reduction orifice plate (24) have the same size, and the diameter of the speed reduction holes (242) on the speed reduction orifice plate (24) decreases as the gas flows in different directions.

6. A dust removal device according to claim 1, characterized in that: The cyclone separator (1) is located on the upper side of the speed reduction device (2).

7. A dust removal device according to claim 1, characterized in that: The cyclone separators (1) are provided with more than two, and are internally connected via a connecting pipe (3), wherein the connecting pipe (3) is a U-shaped pipe.

8. A dust removal device according to any one of claims 1 to 7, characterized in that: A rotary discharger (4) is connected below the cyclone separator (1) and the speed reduction device (2).

Images