Bag-type dust collector for aluminum oxide production

Abstract

The utility model discloses a bag-type dust remover for alumina production in the field of dust removal, which comprises a bag-type dust remover and a dust collecting mechanism, an ash bucket is arranged between the bag-type dust remover and the dust collecting mechanism, two ends of the ash bucket are respectively communicated with the bottom of the bag-type dust remover and the top of the dust collecting mechanism, and a flap valve mechanism is arranged in the ash bucket. The flap valve mechanism is provided with two flaps, the two flaps can seal the ash bucket when being parallel to the ground, lifting lugs are rotationally connected to the front sides and the rear sides of the two flaps, the ends, away from the flaps, of the lifting lugs are fixedly connected with the side wall of the ash bucket, and the lifting lugs are made of stainless steel; the sides, away from each other, of the two turning plates are fixedly connected with balance weights. According to the device, the counter weight is directly added on the turning plate, then the turning plate is rotationally connected into the ash bucket through the lifting lugs made of stainless steel, the consequence that the turning plate valve fails due to the fact that aluminum oxide powder falls into the bearing to abrade the bearing is avoided, the aluminum oxide powder can be recycled after being collected, and waste is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of dust removal, in particular to a bag dust collector for alumina production. Background Art

[0002] During the alumina production process, alumina powder will float into the air. If it is not collected, it will lead to waste of alumina powder and harm the health of workers. Therefore, dust removal equipment is needed to filter the exhaust gas to make alumina production more environmentally friendly. Bag dust collectors are usually used in the alumina production process to filter and clean the exhaust gas, and the escaped alumina powder is collected by bag dust collectors for reuse.

[0003] The existing bag-type dust collector for alumina production is equipped with a heavy hammer flap valve at the ash hopper, and the counterweight part is arranged outside the ash hopper. The connecting shaft of the flap is rotatably connected with a bearing. However, since the material of alumina powder is relatively hard, after a period of use, the alumina powder can easily enter the bearing through the connecting shaft. Over time, the alumina powder will wear the bearing, causing the bearing to fail and get stuck, affecting the rotation of the connecting shaft, thereby causing the flap to be unable to rotate and get stuck in the ash hopper, losing the air locking function and affecting the use effect of the bag-type dust collector. Utility Model Content

[0004] The utility model aims to provide a bag dust collector for alumina production to solve the problem that alumina powder enters into the flap valve bearing, causing the bearing to wear, thereby causing the bag dust collector to lose its air locking function and affecting the use effect of the bag dust collector.

[0005] The bag-type dust collector for alumina production in the present scheme comprises a bag-type dust collector and a dust collecting mechanism, an ash hopper is arranged between the bag-type dust collector and the dust collecting mechanism, two ends of the ash hopper are respectively connected with the bottom of the bag-type dust collector and the top of the dust collecting mechanism, a flap valve mechanism is arranged inside the ash hopper, the flap valve mechanism is provided with two flaps, the two flaps can close the ash hopper when the two flaps are parallel to the ground, the front and rear sides of the two flaps are rotatably connected with lifting ears, the ends of the lifting ears away from the flaps are fixedly connected to the side walls of the ash hopper, the lifting ears are made of stainless steel, and the two flaps are fixedly connected with counterweights on the sides away from each other.

[0006] The working principle and beneficial effects of this solution are as follows: when in use, the bag dust collector collects the aluminum oxide powder escaping from the air, and then shakes it into the ash hopper and is blocked by two sealed flaps. When the weight of the aluminum oxide powder on the flap is greater than the counterweight of the flap, the weight of the aluminum oxide powder presses the flap down, causing the flap to open around the lifting ear as the rotation center, and the aluminum oxide powder can enter the dust collecting mechanism below through the flap for collection. When the aluminum oxide powder falls below, the gravity on the flap disappears, and the counterweight drives the flap to rotate upward until the flap is closed, sealing and locking the air in the bag dust collector. The flap valve mechanism uses a stainless steel lifting ear as the rotation fulcrum of the flap, which prevents the aluminum oxide powder from entering the bearing and causing bearing wear, thereby affecting the flipping of the flap, causing the flap valve to lose its air locking function, thereby affecting the dust removal effect of the bag dust collector. The counterweight of the flap can effectively drive the flap to return to its original position.

[0007] Furthermore, a limit plate is provided below the two flaps, and the limit plate is fixedly connected to the side wall of the ash hopper. The limit plate can prevent the flap from rotating excessively, resulting in the counterweight being unable to effectively drive the flap to return to its original position.

[0008] Furthermore, the top of the limit plate is fixedly connected with a rubber pad, which provides soft support when the flap is turned down to avoid damage caused by violent collision between the flap and the limit plate.

[0009] Furthermore, a plurality of spoilers are provided at the connection between the dust collecting mechanism and the ash hopper, and the spoilers are in an inverted "V" shape, and the plurality of spoilers are fixedly connected to the side wall of the dust collecting mechanism. The inverted "V"-shaped spoilers slow down the falling speed of the aluminum oxide powder when it falls, and when the powder below floats upward, most of the powder can be blocked by the space below the spoilers to prevent it from floating upward.

[0010] Furthermore, the dust collecting mechanism includes a dust collecting box and a push plate, the top of the dust collecting box is connected to the ash hopper, the push plate is slidably connected to the inside of the dust collecting box, the push plate is perpendicular to the ground and parallel to the side wall of the dust collecting box, the push plate is fixedly connected to a hydraulic cylinder that pushes it to move horizontally, and a through groove is provided on the side of the top of the dust collecting box away from the hydraulic cylinder, and a movable door is hinged in the through groove. When alumina powder falls into the dust collecting box and reaches a certain amount, the hydraulic cylinder can be opened to drive the push plate to move horizontally in the dust collecting box, pushing the alumina powder to the bottom of the movable door, and then the movable door can be opened to recycle the alumina powder.

[0011] Furthermore, the push plate ring is provided with a silicone brush, which contacts the side wall of the ash hopper. The silicone brush can more effectively brush the powder inside the dust box to avoid omission. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1This is a schematic diagram of the structure of a bag dust collector for aluminum oxide production according to the utility model;

[0013] Figure 2 for Figure 1 A cross-sectional view of the lower parts of the bag filter;

[0014] Figure 3 for Figure 2 Structural diagram of the middle flap mechanism in the open state. DETAILED DESCRIPTION

[0015] The following is further described in detail through specific implementation methods:

[0016] The reference numerals in the drawings of the specification include: bag filter 1, ash hopper 2, movable door 3, dust collecting box 4, hydraulic cylinder 5, flap 6, limit plate 7, spoiler 8, push plate 9, counterweight 10, and lifting lug 11.

[0017] The embodiment is basically as shown in the attached Figure 1 to Figure 3 As shown: a bag dust collector for alumina production, comprising a bag dust collector 1, an ash hopper 2 and a dust collecting mechanism, the ash hopper 2 is connected to the bottom of the bag dust collector 1, and the end of the ash hopper 2 away from the bag dust collector 1 is connected to the dust collecting mechanism, and a flap valve mechanism is arranged inside the ash hopper 2, and the flap valve mechanism comprises two flaps 6 arranged opposite to each other, the two flaps 6 are parallel to the ground and the inside of the ash hopper 2 can be sealed when the two flaps 6 are parallel to the ground, and the front and rear sides of the two flaps 6 are rotatably connected with lifting ears 11, and the end of the lifting ears 11 away from the flap 6 is fixedly connected to the side wall of the ash hopper 2, and the two flaps 6 are fixedly connected with a counterweight 10 on the side away from each other, and the counterweight 10 is located on the side of the flap 6 close to the dust collecting mechanism, and the two flaps 6 are provided with limit plates 7 below, and the two limit plates 7 are fixedly connected to the side wall of the ash hopper 2, and the two limit plates 7 are inclined downward from the center along the two sides, and the ends of the two limit plates 7 close to the flap 6 are fixedly connected with rubber pads;

[0018] The dust collecting mechanism includes a dust box 4 and a push plate 9. A plurality of spoilers 8 are provided at the position where the dust box 4 and the ash hopper 2 are connected. The plurality of spoilers 8 are all inverted "V" shape. The plurality of spoilers 8 are all fixedly connected to the dust box 4. There are intervals between the plurality of spoilers 8. The push plate 9 is slidably connected to the dust box 4. The push plate 9 is perpendicular to the front and rear sides of the dust box 4. The push plate 9 is parallel to the left and right sides of the dust box 4. A hydraulic cylinder 5 is provided on the left side of the push plate 9. The telescopic end of the hydraulic cylinder 5 passes through the side wall of the dust box 4 and is fixedly connected to the push plate 9. A silicone brush is provided around the push plate 9. The outer sides of the silicone brush are in contact with the inside of the dust box 4. A through groove is provided on the top of the dust box 4 away from the cylinder, and a movable door 3 is hinged in the through groove.

[0019] The specific implementation process is as follows: when in use, the bag filter 1 removes the aluminum oxide powder in the emitted gas, and vibrates to make the aluminum oxide powder fall into the ash hopper 2 below. In order to make the bag filter 1 play a better role, the valve mechanism of the flap 6 in the ash hopper 2 is in a closed state at this time. At this time, the aluminum oxide powder falls on the flap 6. When the aluminum oxide powder accumulates too much and exceeds the counterweight 10 of the flap 6, the flap 6 rotates downward with the ear 11 as the center until the bottom of the flap 6 contacts the rubber pad on the top of the limit plate 7, and the aluminum oxide powder can fall from the gap between the two flaps 6 to the spoiler 8 below, and the flap 6 After the gravity on the dust box disappears, the flap 6 rotates upward driven by the counterweight 10 until the two flaps 6 close the ash hopper 2, and the spoiler 8 slows down the falling speed of the powder to avoid dust. Then the alumina powder falls into the dust box 4 through the gap between the spoiler 8. When a lot of alumina powder is accumulated in the dust box 4, the hydraulic cylinder 5 can be opened, and the telescopic end of the hydraulic cylinder 5 drives the push plate 9 to slide in the dust box 4. The silicone brushes around the push plate 9 push the alumina powder to the bottom of the movable door 3 for accumulation. Then the staff can open the movable door 3 to take out the internal alumina powder for reuse to avoid waste.

[0020] The above is only an embodiment of the utility model, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A bag dust collector for alumina production, comprising a bag dust collector, characterized in that: A dust collecting mechanism is provided, and an ash hopper is provided between the bag dust collector and the dust collecting mechanism, and two ends of the ash hopper are respectively connected to the bottom of the bag dust collector and the top of the dust collecting mechanism, and a flap valve mechanism is provided inside the ash hopper, and the flap valve mechanism is provided with two flaps, and the two flaps can close the ash hopper when they are parallel to the ground, and the front and rear sides of the two flaps are rotatably connected with lifting ears, and the ends of the lifting ears away from the flaps are fixedly connected to the side walls of the ash hopper, and the lifting ears are made of stainless steel, and the two flaps are fixedly connected with counterweights on the sides away from each other.

2. The bag filter for aluminum oxide production according to claim 1, characterized in that: A limiting plate is provided below the two flaps, and the limiting plate is fixedly connected to the side wall of the ash hopper.

3. The bag filter for aluminum oxide production according to claim 2, characterized in that: The top ends of the limiting plates are fixedly connected with rubber pads.

4. The bag filter for aluminum oxide production according to claim 3, characterized in that: A plurality of spoilers are provided at the connection point between the dust collecting mechanism and the ash hopper. The spoilers are in an inverted "V" shape, and the plurality of spoilers are fixedly connected to the side wall of the dust collecting mechanism.

5. The bag filter for aluminum oxide production according to claim 4, characterized in that: The dust collecting mechanism includes a dust box and a push plate. The top of the dust box is connected to the ash hopper. The push plate is slidably connected to the inside of the dust box. The push plate is perpendicular to the ground and parallel to the side wall of the dust box. The push plate is fixedly connected to a hydraulic cylinder that pushes it to move horizontally. A through groove is opened on the side of the top of the dust box away from the hydraulic cylinder, and a movable door is hinged in the through groove.

6. The bag filter for aluminum oxide production according to claim 5, characterized in that: The push plate ring is provided with a silicone brush, and the silicone brush contacts the side wall of the ash hopper.

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