Dust removal device

Abstract

The present application provides a dust removal device, and relates to the technical field of dust removal devices. A dust removal device comprises a shell, the side wall of the shell is provided with an air inlet, and the two ends of the shell are respectively provided with an air outlet and a dust outlet. A dust collecting pipe and a static pressure box are provided inside the shell, and one end of the dust collecting pipe is arranged at the dust outlet. The end with a large diameter of the static pressure box is connected to the end of the shell close to the air outlet, and the end with a small diameter of the static pressure box is provided with an air inlet pipe, and the end of the air inlet pipe away from the static pressure box extends into the dust collecting pipe. A conical pipe is provided between the static pressure box and the dust collecting pipe, the closed end of the conical pipe is connected to the end with a small diameter of the static pressure box, and the expanded end of the conical pipe extends in the direction close to the dust collecting pipe. The dust removal device increases the dust removal path of the gas without increasing the volume of the dust removal device, so that the gas and the particulate matter are fully separated, and after the large particulate matter is separated out, the fine particulate matter is separated, thereby improving the dust removal efficiency and the dust removal effect.

Description

Technical Field

[0001] The present application relates to the technical field of dust removal devices, and in particular to dust removal devices. Background Art

[0002] In industrial production, cyclone separators are a common dust removal equipment, but the efficiency of cyclone separators in removing fine particles is low. Therefore, cyclone separators are generally used in combination with other dust removal devices. One method is to combine cyclone separators with bag dust removal devices, but the equipment system is large, occupies a large area, and has a limited scope of use. At the same time, the dust collection efficiency of bag dust removal devices decreases after a period of use because dust accumulates on the surface of the filter bag, and the filter bag needs to be replaced frequently, which increases the operating cost. Summary of the invention

[0003] The purpose of the present application is to provide a dust removal device to improve the dust removal efficiency of the dust removal device and fully remove fine particles.

[0004] In the first aspect, an embodiment of the present application provides a dust removal device, including a shell, a side wall of the shell is provided with an air inlet, and both ends of the shell are provided with an air outlet and a dust outlet, respectively. A dust collecting pipe is provided inside the shell, one end of the dust collecting pipe is provided at the dust outlet, and the other end extends toward the air outlet. An inverted bell-shaped static pressure box is provided inside the shell, the end of the static pressure box with a large diameter is connected to the end of the shell near the air outlet, the end of the static pressure box with a small diameter is provided with an air inlet pipe, the end of the air inlet pipe away from the static pressure box extends into the dust collecting pipe, and the air inlet is provided on the side of the connection between the static pressure box and the shell near the dust outlet. A conical pipe is provided between the static pressure box and the dust collecting pipe, the closed end of the conical pipe is connected to the end of the static pressure box with a small diameter, the expanded end of the conical pipe extends in the direction close to the dust collecting pipe, and the diameter of the expanded end of the conical pipe is larger than the diameter of the end of the dust collecting pipe near the static pressure box. The shell comprises a cone, the dust outlet is arranged at an end of the cone with a small diameter, and the air outlet is arranged at an end of the shell away from the end of the cone with a small diameter.

[0005] The dust removal device increases the dust removal path of the gas without increasing the volume of the dust removal device through structural improvements, so that the gas and particulate matter are fully separated. After the large particles are separated and removed, the fine particles are separated, thereby improving the dust removal efficiency and effect.

[0006] In a possible implementation, the shell further includes a cylinder, one end of the cylinder is connected to an end of the cone with a larger diameter, and the air outlet is arranged at an end of the cylinder away from the cone.

[0007] The smaller the cross-sectional area of ​​the cone, the faster the gas moves. At the same time, the cone serves to connect with the dust collecting bin.

[0008] In a possible implementation, the air inlet is tangent to the outer wall of the shell. This structure can increase the rotation speed of the dust-laden gas, help separate the particles from the gas under the centrifugal effect, and improve the dust removal efficiency.

[0009] In a possible implementation, the diameter of the air inlet pipe gradually decreases from the end close to the static pressure box to the end close to the dust outlet. The smaller the diameter of the air inlet of the air inlet pipe, the purer the incoming gas.

[0010] In a possible implementation, the distance between an end of the air inlet pipe away from the static pressure box and an end of the dust collecting pipe close to the static pressure box is less than half the length of the dust collecting pipe.

[0011] This structure enables the gas to move to the upper part of the dust collecting pipe, that is, to move upward into the air inlet pipe, thereby preventing the gas from affecting the dust at the dust outlet.

[0012] In a possible implementation, the diameter of one end of the dust collecting pipe close to the static pressure box gradually increases to form a trumpet shape.

[0013] This structure allows the gas moving downward in the conical tube to enter the dust collecting tube, preventing the gas from flowing out from the gap between the dust collecting tube and the conical tube, thereby affecting the dust removal effect.

[0014] In a possible implementation, a filter bag for filtering is provided in the static pressure box, and the filter bag is connected to the air outlet; or a plastic-sintered plate for filtering is provided in the static pressure box, and the plastic-sintered plate is arranged between the air outlet and the air inlet pipe.

[0015] Setting a filter bag at the gas outlet can remove finer particles in the gas before the gas is discharged, so as to purify and remove fine particles in the dust-containing gas. Before the filter bag, the gas undergoes centrifugal and inertial dust removal to remove most of the particles, reduce the dust collection on the surface of the filter bag, and extend the service life of the filter bag. During the backwashing process, the filter bag is set in the static pressure box so that the particles accumulated on the surface of the filter bag can directly enter the dust collection pipe through the air inlet pipe, which is convenient for the collection of particles. Or use a plastic sintered plate instead of a filter bag to remove fine particles in the gas.

[0016] In a possible implementation, a dust collecting bin is further included, which is connected to the dust outlet and is used to collect dust. The present application collects the particles separated from the housing and the dust collecting pipe through the dust collecting bin.

[0017] In a possible implementation, an exhaust fan is further included, and the exhaust fan is connected to the air outlet for exhausting air.

[0018] Through the action of the vacuum fan, the gas in the entire system flows along the above path, thereby achieving the purpose of dust removal. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic structural diagram of a dust removal device provided in an embodiment of the present application from a first perspective;

[0021] Figure 2 A schematic diagram of the structure of the dust removal device provided in an embodiment of the present application from a second perspective;

[0022] Figure 3 A schematic structural diagram of a dust removal device provided in an embodiment of the present application from a third perspective;

[0023] Figure 4 A schematic diagram of the structure inside the shell provided in an embodiment of the present application.

[0024] Icons: 100-dust removal device; 110-housing; 111-air inlet; 112-air outlet; 113-dust outlet; 114-cylinder; 115-cone; 120-static pressure box; 130-dust collecting pipe; 140-air inlet pipe; 150-conical pipe; 160-filter bag; 170-dust collecting bin. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians of the art without making creative work are within the scope of protection of the present application.

[0026] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0027] Some implementation methods of the present application are described in detail below in conjunction with the accompanying drawings.

[0028] Please refer to Figure 1 , Figure 1 This is a schematic structural diagram of the dust removal device 100 provided in an embodiment of the present application from a first perspective.

[0029] The present embodiment provides a dust removal device 100 for removing fine particles in dust-containing gas. The dust removal device 100 includes a housing 110, a side wall of the housing 110 is provided with an air inlet 111, and both ends of the housing 110 are provided with an air outlet 112 and a dust outlet 113. The dust-containing gas enters the housing 110 through the air inlet 111, and after dust removal, dust and other particles are discharged from the dust outlet 113, and the dust-removed gas is discharged from the air outlet 112.

[0030] Please refer to Figure 1 , Figure 2 and Figure 3 , Figure 2 and Figure 3 The schematic diagrams of the structure of the dust removal device 100 provided in the second and third perspectives of the embodiments of the present application are respectively shown. In some embodiments of the present application, the shell 110 includes a cylinder 114 and a cone 115, and the end of the cone 115 with a larger diameter is connected to one end of the cylinder 114. The dust outlet 113 is arranged at the end of the cone 115 with a smaller diameter, the air outlet 112 is arranged at the end of the cylinder 114 away from the cone 115, and the air inlet 111 is arranged on the side wall of the cylinder 114. In some embodiments of the present application, in order to provide a rotational motion of the dust-laden gas, the air inlet 111 is tangent to the outer wall of the shell 110, that is, the air inlet 111 is tangent to the outer wall of the cylinder 114.

[0031] Please refer to Figure 2 , Figure 3 and Figure 4 , Figure 4A schematic diagram of the structure of the interior of the shell provided in an embodiment of the present application. An inverted bell-shaped static pressure box 120 is provided inside the shell 110. In the embodiment of the present application, the static pressure box 120 is arranged inside the cylinder 114. The inverted bell-shaped arrangement of the static pressure box 120 in the present application can eliminate the upper top surface area of ​​the dust removal device 100, thereby eliminating the generation of the top ash ring and improving the dust removal efficiency. The circumferential edge of the end with a large diameter of the static pressure box 120 is sealed and connected to the end of the cylinder 114 close to the air outlet 112, and the end with a small diameter of the static pressure box 120 is arranged near the connection between the cylinder 114 and the cone 115. In other embodiments of the present application, the static pressure box 120 can be arranged inside the cylinder 114 and the cone 115, that is, the end with a small diameter of the static pressure box 120 is arranged inside the cone 115. The specific structure can be adjusted according to actual needs, and the present application does not limit it.

[0032] The air inlet 111 is disposed at the upper portion of the side wall of the cylinder 114, namely, near the static pressure box 120. This structure can cause the gas to rotate and generate centrifugal force, thereby performing dust removal.

[0033] A dust collecting pipe 130 for collecting dust is disposed inside the housing 110 . One end of the dust collecting pipe 130 is disposed at the dust outlet 113 , and the other end extends toward the static pressure box 120 . There is a certain distance between the dust collecting pipe 130 and the static pressure box 120 .

[0034] An air inlet pipe 140 is provided at the end with a small diameter of the static pressure box 120, and the end of the air inlet pipe 140 away from the static pressure box 120 extends into the dust collecting pipe 130, so that the static pressure box 120 is connected to the inside of the dust collecting pipe 130. A conical pipe 150 is also provided at the end with a small diameter of the static pressure box 120, and the conical pipe 150 is sleeved on the outside of the air inlet pipe 140. The length of the conical pipe 150 is less than the length of the air inlet pipe 140, so that the conical pipe 150 is arranged between the static pressure box 120 and the dust collecting pipe 130. Specifically, the closed end of the conical pipe 150 is connected to the end with a small diameter of the static pressure box 120, and the expanded end of the conical pipe 150 extends in a direction close to the dust collecting pipe 130, and there is a gap between the conical pipe 150 and the dust collecting pipe 130 for gas to pass through.

[0035] After the gas enters the shell 110, it rotates along the side wall of the cylinder 114. After moving to the lower part of the cone 115, the gas moves upward along the outer wall of the dust collecting pipe 130 and enters the conical tube 150. Since the top of the conical tube 150 is a sealed structure, the gas moves downward along the outer wall of the intake pipe 140 into the dust collecting pipe. Under the suction action in the intake pipe, the gas is forced upward and enters the intake pipe 140, and then enters the static pressure box 120.

[0036] Furthermore, the diameter of the expanded end of the conical tube 150 is larger than the diameter of the end of the dust collecting tube 130 near the static pressure box 120, so that the gas can smoothly enter the conical tube 150. The present application adopts the conical tube 150 so that during the movement of the gas in the conical tube 150, the diameter of the conical tube gradually decreases, the rotation speed of the gas increases, the centrifugal force increases, and it is helpful to separate small-sized particles and improve the dust removal efficiency.

[0037] After the gas moves to the top of the conical tube 150, it is blocked and changes its direction of movement and then moves downward. In some embodiments of the present application, the diameter of the dust collecting tube 130 at one end close to the static pressure box 120 gradually increases and becomes trumpet-shaped. This structure allows the gas moving downward in the conical tube 150 to enter the dust collecting tube 130, preventing the gas from flowing out from the gap between the dust collecting tube 130 and the conical tube 150, affecting the dust removal effect. It should be noted that when the diameter of the dust collecting tube 130 is trumpet-shaped, the diameter of the trumpet mouth is smaller than the diameter of the expanded end of the conical tube 150.

[0038] The gas enters the dust collecting pipe 130 and moves downward along the side wall of the dust collecting pipe 130. During this process, the particles in the gas continue to separate from the gas under the centrifugal effect. Since the bottom of the dust collecting pipe 130 is connected to the dust outlet 113, in order to avoid the influence of the gas on the discharge of dust, the distance between the end of the air inlet pipe 140 away from the static pressure box 120 and the end of the dust collecting pipe 130 close to the static pressure box 120 is less than half the length of the dust collecting pipe 130. Avoid the influence of the gas on the dust at the dust outlet 113.

[0039] In order to further improve the removal of fine particles by the dust removal device 100, a filter bag 160 for filtering is provided in the static pressure box 120, and the filter bag 160 is connected to the air outlet 112. After the gas enters the static pressure box 120 through the air inlet pipe 140, it enters the filter bag 160, filters the fine particles through the filter bag 160, and then is discharged from the air outlet 112. In some embodiments of the present application, the air outlet 112 is arranged at the center of the end of the cylinder 114 away from the cone 115, and the filter bag 160 is arranged in the static pressure box 120 directly opposite to the air inlet 111. On the one hand, this structure helps to discharge the gas, and on the other hand, during the backwashing process, when the particles accumulated on the surface of the filter bag 160 fall, they can directly enter the dust collecting pipe 130 through the air inlet pipe 140, and then be discharged through the dust outlet 113. It is prevented that the particles on the surface of the filter bag 160 remain in the dust removal device 100 and affect the dust removal effect on the gas. In other embodiments of the present application, the filter bag can also be replaced with a plastic burning plate, which is arranged between the air outlet and the air inlet pipe to remove finer particles in the dust. The plastic burning plate is a common component in the technical field, and the present application does not limit its structure.

[0040] The dust removal device 100 also includes a dust collection bin 170, which is connected to the dust outlet 113 for collecting dust. In the embodiment of the present application, the dust collection pipe 130 extends out of the dust outlet 113 and is connected to the dust collection bin 170, and the dust outlet 113 is connected to the dust collection bin 170 through a connecting pipe. This structure increases the distance between the gas and the dust collection bin 170, and prevents the gas moving in the housing 110 from affecting the collection of dust in the dust collection bin 170.

[0041] In order to ensure the normal flow of gas and ensure that the gas in the dust collecting pipe 130 can enter the air inlet pipe 140, the dust removal device 100 also includes an exhaust fan (not shown), which is connected to the air outlet 112 for exhausting air. The exhaust fan puts the housing 110 in a negative pressure state, which helps the flow of gas. It should be noted that the dust collecting bin 170 and the exhaust fan in this application are common devices in the technical field, and this application does not limit their structures.

[0042] Working principle: The dust-laden gas enters from the air inlet 111 and rotates along the side wall of the cylinder 114. Under the centrifugal effect, the pollutant particles in the dust-laden gas are separated to the side wall of the cylinder 114. After hitting the side wall, the rotation rate of the particles gradually decreases due to the friction of the wall surface. Under the action of gravity, they move downward along the side wall of the shell 110 and finally enter the dust collecting bin 170 from the dust outlet 113.

[0043] The gas in the cylinder 114 moves downward along the side wall of the housing 110, and after moving to the lower part of the cone 115, due to the obstruction of the lower space, the gas moves upward from the outer wall of the dust collecting pipe 130 until entering the conical pipe 150. In the conical pipe 150, as the diameter of the conical pipe 150 gradually decreases, the gas movement space gradually shrinks, causing the rotation speed to increase. Under the centrifugal effect, finer particles are separated to the inner wall of the conical pipe 150. After the gas moves upward in the conical pipe 150 and collides with the top, it is obstructed and moves downward in the opposite direction to enter the dust collecting pipe 130.

[0044] In the dust collecting pipe 130, due to the suction effect in the air inlet pipe, the air flow moves upward from the lower end of the air inlet pipe 140 and enters the air inlet pipe 140, while the fine particles in the gas continue to move downward under the action of inertia and separate from the gas, and are finally discharged from the dust outlet 113. The gas in the air inlet pipe 140 continues to move upward after entering the static pressure box 120, and enters the filter bag 160, and the finer particles are filtered by the filter bag 160, and the clean gas flows out from the air outlet 112 through the filter bag 160, thereby achieving the purpose of dust removal.

[0045] The dust removal device 100 provided in the present application improves the structure, and without increasing the volume of the dust removal device 100, increases the dust removal path of the gas, so that the gas and particulate matter are fully separated, and after the large particulate matter is separated, the fine particulate matter is separated, thereby improving the dust removal efficiency and dust removal effect. The present application combines cyclone dust removal with dust removal by the filter bag 160, and the filter bag 160 is filtered before the gas is discharged from the dust removal device 100, further improving the removal of fine particulate matter, and at the same time increasing the service life of the filter bag 160.

[0046] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A dust removal device, characterized in that: It comprises a shell, the side wall of the shell is provided with an air inlet, and the two ends of the shell are respectively provided with an air outlet and a dust outlet; A dust collecting pipe is provided inside the shell, one end of the dust collecting pipe is arranged at the dust outlet, and the other end extends to the air outlet; An inverted bell-shaped static pressure box is provided inside the shell, an end of the static pressure box with a larger diameter is connected to an end of the shell close to the air outlet, an end of the static pressure box with a smaller diameter is provided with an air inlet pipe, an end of the air inlet pipe away from the static pressure box extends into the dust collecting pipe, and the air inlet is provided on a side of the connection between the static pressure box and the shell close to the dust outlet; A conical tube is provided between the static pressure box and the dust collecting pipe, the closed end of the conical tube is connected to the end of the static pressure box with a smaller diameter, the expanded end of the conical tube extends toward the dust collecting pipe, and the diameter of the expanded end of the conical tube is greater than the diameter of the end of the dust collecting pipe close to the static pressure box; The shell comprises a cone, the dust outlet is arranged at an end of the cone with a smaller diameter, and the air outlet is arranged at an end of the shell away from the end of the cone with a smaller diameter.

2. The dust removal device according to claim 1, characterized in that: The shell also includes a cylinder, one end of which is connected to an end of the cone with a larger diameter, and the air outlet is arranged at an end of the cylinder away from the cone.

3. The dust removal device according to claim 1 or 2, characterized in that: The air inlet is tangent to the outer wall of the shell.

4. The dust removal device according to claim 1 or 2, characterized in that: The flared end of the tapered tube is disposed inside the cone.

5. The dust removal device according to claim 1 or 2, characterized in that: The diameter of the air inlet pipe gradually decreases from an end close to the static pressure box to an end close to the dust outlet.

6. The dust removal device according to claim 5, characterized in that: The distance between one end of the air inlet pipe away from the static pressure box and one end of the dust collecting pipe close to the static pressure box is less than half the length of the dust collecting pipe.

7. The dust removal device according to claim 5, characterized in that: The diameter of one end of the dust collecting pipe close to the static pressure box gradually increases and becomes a trumpet shape.

8. The dust removal device according to claim 1, characterized in that: A filter bag for filtering is provided in the static pressure box, and the filter bag is communicated with the air outlet; Or a plastic-sintered plate for filtering is provided in the static pressure box, and the plastic-sintered plate is arranged between the air outlet and the air inlet pipe.

9. The dust removal device according to claim 1, characterized in that: It also includes a dust collecting bin, which is connected to the dust outlet and is used to collect dust.

10. The dust removal device according to claim 1, characterized in that: It also includes an exhaust fan, which is connected to the air outlet and is used for exhausting air.

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