Powder dedusting and packaging device

Abstract

The utility model discloses a powder dedusting and packaging device, which belongs to the technical field of dedusting equipment and comprises a barrel, an inlet pipe and an outlet pipe are arranged on the barrel, a partition plate is arranged in the barrel, a plurality of filter bags are arranged on the partition plate, a pulse injection component is arranged on the barrel, a discharge pipe is arranged at the bottom of the barrel, and a discharge valve is arranged on the discharge pipe. A first baffle is arranged at the position, corresponding to the inlet pipe, in the barrel, the first baffle is an arc-shaped plate, and airflow entering the inlet pipe advances along the inner wall of the barrel under the guidance of the first baffle. According to the utility model, turbulent flow at the inlet pipe is reduced, and pressure loss is reduced; airflow passing through the first through hole is blocked by the second baffle, so that the airflow enters the barrel in an arc shape while the filter bag is protected, and the back-mixing amount of falling dust is reduced; and the second baffle is longer than the first baffle, so that the entering airflow is better guided to advance in the barrel in an arc shape, the pressure loss is reduced, and the back-mixing amount of falling dust is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of dust removal equipment, specifically relating to a powder dust removal and packaging device. Background Technology

[0002] Because ultrafine grinding can deagglomerate iron oxide pigments from large aggregates into smaller aggregates, it significantly improves their dispersibility in media such as coatings and plastics, and reduces sedimentation, floating color, and blooming. Existing iron oxide particle grinding is usually carried out by using a fluidized bed air jet mill to form a spray zone to grind iron oxide particles. The ground iron oxide powder is then collected in a hopper by a cyclone separator and a cylindrical collector to remove dust from the iron oxide powder in the airflow. Existing cylindrical collectors generally use filter bags for dust removal. When entering the cylinder, straight baffles are usually set to redirect the incoming airflow. On the one hand, this protects the filter bags, and on the other hand, the inertia causes coarse particles in the airflow to fall after hitting the baffles. However, such straight baffles are prone to rebounding the airflow and forming turbulence, which increases the pressure loss of the system. Utility Model Content

[0003] The technical problem solved by this utility model is to provide a powder dust removal and packaging device that reduces the pressure loss of the system airflow caused by the baffle.

[0004] Technical solution: To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A powder dust removal and packaging device includes a cylindrical body with an inlet pipe and an outlet pipe. A partition plate is installed inside the cylindrical body, and multiple filter bags are installed on the partition plate. Dust-laden airflow entering through the inlet pipe is filtered by the filter bags and discharged through the outlet pipe. A pulse jet cleaning assembly is installed on the cylindrical body, and a discharge pipe with a discharge valve is located at the bottom of the cylindrical body. The discharge pipe is detachably connected to a material container. A first baffle, which is arc-shaped, is installed inside the cylindrical body at a position corresponding to the inlet pipe. Airflow entering through the inlet pipe is guided by the first baffle to advance along the inner wall of the cylindrical body.

[0006] Furthermore, the first baffle is provided with an intermediate area corresponding to the inlet pipe, and the intermediate area is provided with a plurality of first through holes.

[0007] Furthermore, a second baffle is connected to the first baffle, and the airflow passing through the plurality of first through holes impacts the second baffle.

[0008] Furthermore, the aperture ratio of the intermediate region is S, where 65% ≤ S ≤ 70%.

[0009] Furthermore, the second baffle is an arc-shaped plate, and the windward side of the second baffle is provided with a wear-resistant layer.

[0010] Furthermore, the circle containing the first baffle is concentric with the circle containing the cylinder, the distance between the first baffle and the cylinder is A, and the diameter of the inlet pipe is D, where A≥D.

[0011] Furthermore, the circle containing the second baffle is concentric with the circle containing the cylinder, and the distance between the second baffle and the first baffle is B, where B≥D.

[0012] Furthermore, the first baffle and the second baffle are in the same cross-section, and the arc of the second baffle is longer than the arc of the first baffle.

[0013] Furthermore, the pulse jet assembly includes an air reservoir, an electromagnetic pulse valve connected to the air reservoir, a jet pipe connected to the electromagnetic pulse valve, and a plurality of nozzles connected to the jet pipe.

[0014] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0015] 1. By setting an arc-shaped first baffle, an intermediate zone corresponding to the inlet pipe is set on the first baffle, and multiple first through holes are set on the intermediate zone. The airflow entering the inlet pipe passes through the first through holes, and part of the airflow advances along the inner wall of the cylinder under the guidance of the first baffle, reducing the formation of turbulence at the inlet pipe and reducing pressure loss.

[0016] 2. A second baffle is installed directly in front of the first baffle. The airflow passing through the first through hole is blocked by the second baffle, which protects the filter bag and makes the airflow enter the cylinder in an arc shape, reducing the amount of back-mixing of falling dust.

[0017] 3. The second baffle is longer than the first baffle, which better guides the incoming airflow in an arc shape to move forward in the cylinder, reducing pressure loss and the amount of back-mixing of falling dust. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the external structure of the device according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the internal structure of the cylinder in an embodiment;

[0020] Figure 3 This is a schematic diagram of the airflow direction at the inlet pipe in an embodiment;

[0021] Figure 4 This is a schematic diagram of the front structure of the first baffle in the embodiment;

[0022] Figure 5 This is a schematic diagram of the structure of the first and second baffles in the embodiment;

[0023] Figure 6 This is a schematic diagram of the second baffle structure in the embodiment;

[0024] Figure 7 This is a schematic diagram of the filter bag backflushing state in an embodiment. Detailed Implementation

[0025] The present invention will be further illustrated below with reference to specific embodiments. The embodiments are implemented based on the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0026] like Figure 1 and Figure 2 As shown, a powder dust removal and packaging device is used in an iron oxide airflow pulverizing system for collecting and packaging iron oxide powder. The device includes a cylinder 1 with multiple support legs 19 connected to its outer wall for support. The upper half of the cylinder 1 is cylindrical, and the lower half is inverted conical. An inlet pipe 11 and an outlet pipe 12 are provided on the side of the cylinder 1. The inlet pipe 11 is connected to the lower part of the upper half of the cylinder 1, and the outlet pipe 12 is connected to the side of the cylinder 1 near the top. The outlet pipe 12 is connected to an external induced draft fan 9. When the induced draft fan 9 is working, it drives the air inside the cylinder 1 to flow towards the induced draft fan 9, thereby creating a negative pressure at the inlet pipe 11. The inlet pipe 11 is connected to an external cyclone separator. After the pulverized iron oxide particles pass through the cyclone separator for preliminary powder collection, the airflow carrying the iron oxide powder enters the cylinder 1 to continue the powder collection process.

[0027] like Figure 1 , Figure 2 and Figure 7 As shown, a partition plate 2 is provided inside the cylinder 1, and multiple filter bags 3 are provided on the partition plate 2. The partition plate 2 is located in the upper middle part of the cylinder 1, dividing the space inside the cylinder 1 into an upper clean air zone and a lower dust zone. The partition plate 2 has multiple through holes. The filter bags 3 are existing cylindrical filter bags with one open end and a filtration accuracy of 0.5μm. The lower end of the filter bag 3 is inserted into the corresponding through hole on the partition plate 2 to enter the dust zone. The filter bag 3 has a frame 31 inside, and the upper end of the frame 31 is connected to the partition plate 2 and presses the upper end of the filter bag 3 onto the partition plate 2 to fix the filter bag 3. The airflow containing dust entering through the inlet pipe 11 is filtered by the filter bag 3 in the dust zone and then enters the clean air zone, and finally exits from the outlet pipe 12.

[0028] like Figure 1 and Figure 2As shown, the cylinder 1 is equipped with a pulse jet cleaning assembly 4, which includes an air tank 41, an electromagnetic pulse valve 42, a jet pipe 43, and multiple nozzles 44. The air tank 41 is connected to the outer wall of the cylinder 1 and is manufactured as a pressure vessel as an air storage tank. The electromagnetic pulse valve 42 is connected to the air tank 41 and can accurately release compressed air pulses. The jet pipe 43 is connected to the electromagnetic pulse valve 42 and is located in the clean air zone of the cylinder 1. Multiple nozzles 44 are connected to the jet pipe 43 through branch pipes. The number of nozzles 44 corresponds to the number of filter bags 3. The nozzles 44 are located on the upper part of the corresponding filter bags 3. The nozzles 44 adopt existing venturi nozzles, which can enhance the expansion range and dust removal force of the filter bag 3. The pulse jet cleaning assembly 4 can remove dust from the surface of the filter bag 3 by accurately releasing compressed air and directionally releasing high-pressure airflow.

[0029] like Figure 1 and Figure 2 As shown, the bottom of the cylinder 1 is provided with a discharge pipe 13. The lower half of the inverted cone-shaped cylinder 1 forms a hopper. After being filtered, the iron oxide powder falls from the hopper into the discharge pipe 13. The discharge pipe 13 is provided with a discharge valve 14. The discharge valve 14 adopts the existing rotary feed valve. The powder is continuously and quantitatively discharged by the rotation of the impeller. The discharge pipe 13 is detachably connected to the material bucket 5. The material bucket 5 is moved to the bottom of the discharge pipe 13 by a moving trolley. A canvas pipe is detachably connected to the material bucket 5. The lower end of the canvas pipe is connected to the inside of the material bucket 5. An elastic band is connected to the upper end of the canvas pipe. The material bucket 5 is connected to the discharge pipe 13 by the upper end of the canvas pipe being sleeved on the lower end of the discharge pipe 13. After the discharge reaches a certain amount, the discharge valve 14 is closed, the canvas pipe is removed and the material bucket 5 is moved away. A new material bucket is then moved to the bottom of the discharge pipe 13 to wait for the material to be received.

[0030] like Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, the cylinder 1 is equipped with a first baffle 6 corresponding to the position of the inlet pipe 11. The first baffle 6 is connected to the inner wall of the cylinder 1 via a first connecting rod. Along the airflow direction of the inlet pipe 11, the first baffle 6 is located directly in front of the inlet pipe 11. The first baffle 6 is an arc-shaped plate. On the same cross-section, the circle containing the first baffle 6 is concentric with the circle containing the cylinder 1. A middle area 61 is provided in the middle position of the first baffle 6, corresponding to the position of the inlet pipe 11. The middle area 61 is circular in shape (it can also be set to a square or rectangular shape as needed). The middle area 61 is provided with multiple first through holes 601, which are circular holes. The multiple first through holes 601 are arranged in an array in the middle area 61. The distribution is as follows: the opening ratio of the middle zone 61 is S, 65%≤S≤70%, and in this embodiment S=65%. Part of the airflow entering the inlet pipe 11 passes directly through the first through hole 601 of the middle zone 61, and the other part advances along the inner wall of the cylinder 1 under the obstruction and guidance of the first baffle 6. The diameter of the inlet pipe 11 is D, and the distance between the first baffle 6 and the cylinder 1 is A, A≥D, and in this embodiment A=D. Compared with the existing straight baffle, the first baffle 6 of the arc plate can guide the incoming airflow, reduce airflow rebound, and thus reduce pressure loss. Setting multiple first through holes 601 can guide part of the airflow to pass directly. In combination with the arc baffle, it can reduce pressure loss and achieve a flow equalization effect. A second baffle 7 is connected to the first baffle 6. The second baffle 7 is connected to the first baffle 6 via a second connecting rod. The second baffle 7 is an arc-shaped plate. On the same cross-section, the circle containing the second baffle 7 is concentric with the circle containing the cylinder 1, and the arc of the second baffle is longer than the arc of the first baffle. Along the airflow direction of the inlet pipe 11, the second baffle 7 is located directly in front of the first baffle 6. The distance between the second baffle 7 and the first baffle 6 is B, where B ≥ D. In this embodiment, B = D. The airflow passing through the multiple first through holes 601 impacts the second baffle 7. Thus, under the blocking and guiding effect of the second baffle 7, the airflow enters the cylinder 1 along the arc between the second baffle 7 and the first baffle 6. The length of the second baffle 7 is longer than that of the first baffle 6, which better guides the incoming airflow to advance in an arc shape in the cylinder 1. Due to the blocking effect of the second baffle 7, the airflow will not directly impact the surface of the filter bag 3, which improves the service life of the filter bag 3. Furthermore, the airflow entering the cylinder 1 in an arc shape can reduce the amount of back-mixing of falling dust. In order to improve the service life of the second baffle 7 and protect the quality of the powder, the windward side of the second baffle 7 is provided with a wear-resistant layer 71. The wear-resistant layer 71 adopts the existing silicon carbide ceramic composite layer, which ensures wear resistance while meeting the cleanliness requirements of iron oxide powder.

[0031] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A powder dust removal and packaging device, characterized in that, The device includes a cylindrical body (1), which has an inlet pipe (11) and an outlet pipe (12). The cylindrical body (1) has a partition plate (2) inside, and multiple filter bags (3) are provided on the partition plate (2). The airflow containing dust entering through the inlet pipe (11) is filtered by the filter bags (3) and discharged from the outlet pipe (12). The cylindrical body (1) has a pulse jet blowing assembly (4). The bottom of the cylindrical body (1) has a discharge pipe (13) with a discharge valve (14). The discharge pipe (13) is detachably connected to a material bucket (5). The cylindrical body (1) has a first baffle (6) at the position corresponding to the inlet pipe (11). The first baffle (6) is an arc-shaped plate. The airflow entering through the inlet pipe (11) advances along the inner wall of the cylindrical body (1) under the guidance of the first baffle (6).

2. The powder dust removal and packaging device according to claim 1, characterized in that, The first baffle (6) is provided with an intermediate area (61) corresponding to the inlet pipe (11), and the intermediate area (61) is provided with a plurality of first through holes (601).

3. The powder dust removal and packaging device according to claim 2, characterized in that, A second baffle (7) is connected to the first baffle (6), and the airflow passing through the plurality of first through holes (601) impacts the second baffle (7).

4. The powder dust removal and packaging device according to claim 2, characterized in that, The opening ratio of the intermediate zone (61) is S, 65%≤S≤70%.

5. The powder dust removal and packaging device according to claim 3, characterized in that, The second baffle (7) is an arc-shaped plate, and the windward side of the second baffle (7) is provided with a wear-resistant layer (71).

6. The powder dust removal and packaging device according to claim 3, characterized in that, The circle containing the first baffle (6) is concentric with the circle containing the cylinder (1), the distance between the first baffle (6) and the cylinder (1) is A, the diameter of the inlet pipe (11) is D, and A≥D.

7. The powder dust removal and packaging device according to claim 6, characterized in that, The circle containing the second baffle (7) is concentric with the circle containing the cylinder (1), and the distance between the second baffle (7) and the first baffle (6) is B, where B ≥ D.

8. The powder dust removal and packaging device according to claim 7, characterized in that, The first baffle (6) and the second baffle (7) are in the same cross section, and the arc of the second baffle (7) is longer than the arc of the first baffle (6).

9. The powder dust removal and packaging device according to claim 1, characterized in that, The pulse jet assembly (4) includes an air tank (41), an electromagnetic pulse valve (42) connected to the air tank (41), a jet pipe (43) connected to the electromagnetic pulse valve (42), and a plurality of nozzles (44) connected to the jet pipe (43).

Images