Bag-type dust collector unit, bag-type dust collector and electrolytic aluminum flue gas purification system

Abstract

The embodiment of the utility model discloses a bag-type dust collector unit, a bag-type dust collector and an electrolytic aluminum flue gas purification system, the bag-type dust collector unit comprises a box body, a filter bag, a baffle plate, a driving device and a fixing device, the box body is provided with a gas inlet and a gas outlet; the filter bag is arranged in the box body; the baffle is movably connected with the box body; the driving device can drive the baffle to reciprocate between a first position and a second position; the fixing device comprises a first fixing piece arranged on the baffle and a second fixing piece arranged on the box body. Moreover, at the first position, the air outlet is opened, and the first fixing piece and the second fixing piece are fixedly connected so that the baffle can be fixed to the box body. By arranging the fixing device, the baffle is forcibly fixed at the opening position when the bag-type dust collector operates normally, so that the situation that the baffle is closed due to external factors is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of dust removal devices, and in particular to a bag dust collector unit, a bag dust collector and an electrolytic aluminum fume purification system. Background Art

[0002] In the related art, dust-laden gas can be treated by using a bag filter. The working principle is to introduce dust-laden gas into the bag filter box through a connecting pipe, and the dust is filtered by the filter bag in the box. The purified gas is discharged through the air outlet of the box. The air outlet is usually opened and closed by a movable controlled baffle. However, when the bag filter is operating normally, the baffle will automatically close, which may easily cause the adsorbent film on the filter bag to fall off, causing material fluctuations. Utility Model Content

[0003] The embodiments of the present application provide a bag filter unit, a bag filter and an electrolytic aluminum fume purification system that can prevent the baffle from being improperly closed.

[0004] In a first aspect, an embodiment of the present application provides a bag filter unit, comprising:

[0005] A box body, wherein the box body has an air inlet and an air outlet;

[0006] A filter bag, the filter bag is arranged inside the box and between the air inlet and the air outlet;

[0007] A baffle, the baffle is arranged corresponding to the air outlet and is movably connected to the box;

[0008] A driving device, the driving device is connected to the baffle plate and can drive the baffle plate to reciprocate between a first position and a second position;

[0009] A fixing device, the fixing device comprising a first fixing member provided on the baffle and a second fixing member provided on the box body; and,

[0010] In the first position, the air outlet is open, and the first fixing member and the second fixing member are fixedly connected to fix the baffle to the box body; in the second position, the baffle blocks the air outlet, and the air outlet is closed.

[0011] In some embodiments, the central axis of the air inlet is arranged at an angle to the central axis of the air outlet.

[0012] In some embodiments, the baffle is rotatably connected to the housing.

[0013] In some embodiments, the driving device includes a cylinder and a piston rod, one end of the piston rod is connected to the piston of the cylinder, and the other end of the piston rod is hinged to the baffle.

[0014] In some embodiments, the first fixing member includes a fixing rod, the bottom of the fixing rod is connected to the baffle, the top of the fixing rod has a threaded section, the second fixing member includes a nut, the box body is provided with a hole, in the first position, the threaded section passes through the hole, the nut is threadedly connected to the threaded section and presses the box body.

[0015] In some embodiments, the hinge between the baffle and the piston rod is a first connection, the connection between the baffle and the fixed rod is a second connection, and the distance between the first connection and the second connection is greater than or equal to 15 cm and less than or equal to 25 cm.

[0016] In some embodiments, the baffle has a first end and a second end that are oppositely disposed, the first end corresponds to an edge of the air outlet, the second end corresponds to another oppositely disposed edge of the air outlet, the first end is rotatably connected to the box body, and the fixing rod and the piston rod are both located between the first end and the second end.

[0017] In some embodiments, in the first position, the first fixing member and the second fixing member are fixed by magnetic attraction, snap connection or plug connection.

[0018] In a second aspect, an embodiment of the present application provides a bag-type dust collector, comprising a plurality of bag-type dust collector units arranged along an airflow direction.

[0019] In a third aspect, an embodiment of the present application provides an electrolytic aluminum fume purification system, including the bag filter.

[0020] Beneficial effect: A driving device is provided to control the baffle to open or close the air outlet of the box, and a fixing device is provided to force the baffle to be fixed in the open position when the bag dust collector is operating normally, thereby avoiding the situation where the baffle is closed due to external factors. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0022] Figure 1is a schematic structural diagram of the bag filter unit of the embodiment of the present application when in the second position;

[0023] Figure 2 It is a schematic diagram of the structure of the bag filter unit in the first position of the embodiment of the present application.

[0024] Description of reference numerals:

[0025] 1. Box body; 11. Air inlet; 12. Air outlet; 13. Holes; 2. Filter bag; 3. Baffle; 4. Cylinder; 5. Piston rod; 6. Fixing rod; 7. Nut. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] In the related art, the electrolytic aluminum fume purification system uses a bag filter to purify the fume. The bag filter includes a box body and an ash hopper. A filter bag is arranged inside the box body. The filter bag is located between the air inlet and the air outlet of the box body, and the ash hopper is arranged at the bottom of the box body. When the dust-carrying airflow passes through the filter bag, the dust is adsorbed on the filter bag and finally falls into the ash hopper, thereby achieving the effect of airflow purification. The air outlet is usually provided with a movable baffle, which is controlled by a cylinder, and the cylinder is driven by compressed air. However, due to the poor stability of the compressed air in the plant area and the large water content in the compressed air, when the compressed air is unstable, the cylinder is easy to close automatically. After the compressed air is restored, the cylinder automatically opens again, thereby affecting the normal operation of the bag filter; and when the box body is abnormally closed, the adsorbent film (such as alumina powder) attached to the filter bag will fall off, causing the electrolytic aluminum material to fluctuate, which will affect the electrolytic aluminum production.

[0032] The embodiment of the present application provides a fixing device so that the baffle is fixed to the box by the fixing device when it is open, so that when the bag dust collector is working normally, the baffle is kept open and will not be improperly opened or closed, so that the airflow is stable and will not cause the material film to fall off and the material to fluctuate.

[0033] like Figure 1 and Figure 2As shown, a bag filter unit includes a housing 1, a filter bag 2, a baffle 3, a driving device and a fixing device. The housing 1 has an air inlet 11 and an air outlet 12, wherein the air inlet 11 is used for supplying dust-carrying airflow into the housing 1, and the air outlet 12 is used for supplying dust-removed and purified airflow out of the housing 1. The filter bag 2 is arranged inside the housing 1, and the filter bag 2 is located between the air inlet 11 and the air outlet 12, and the filter bag 2 can filter out dust in the airflow. The baffle 3 is arranged at the air outlet 12, and the baffle 3 is located inside the housing 1 and is movably connected to the housing 1. The driving device is connected to the baffle 3 in power, and can drive the baffle 3 to reciprocate between a first position and a second position relative to the air outlet 12. The fixing device is used to fix the baffle 3. In the first position, the baffle 3 is located inside the air outlet 12 and separated from the air outlet 12, thereby opening the air outlet 12, and the fixing device fixes the baffle 3 to the box body 1, and the first position is equivalent to the open position; in the second position, the baffle 3 is located inside the air outlet 12 and closes the air outlet 12, thereby closing the air outlet 12, and the second position is equivalent to the closed position. When the bag dust collector is operating normally, the baffle 3 is in the first position and the air outlet 12 is open; when the bag dust collector stops operating, the baffle 3 is in the second position and the air outlet 12 is closed.

[0034] A driving device is provided to control the baffle 3 to open or close the air outlet 12 of the box body 1, and a fixing device is provided to force the baffle 3 to be fixed in the open position when the bag dust collector is operating normally, thereby avoiding the situation where the baffle 3 is closed due to external factors, reducing or avoiding the falling of the adsorption material film, and further reducing or avoiding the material fluctuation.

[0035] The baffle plate 3 is disposed inside the box body 1 and is movably connected to the box body 1 . Usually, the baffle plate 3 can rotate relative to the box body 1 , or the baffle plate 3 can move relative to the box body 1 .

[0036] In some embodiments, the baffle 3 is rotatably connected to the housing 1. The baffle 3 includes a first end and a second end that are relatively arranged, the first end can correspond to an edge of the air outlet 12, and the second end can correspond to another relatively arranged edge of the air outlet 12. The first end is rotatably connected to the housing 1, so that the baffle 3 can swing around the rotation axis within a certain angle range relative to the housing 1. For example, the rotation axis can be perpendicular to the direction of gravity. The driving device includes a power source and a transmission mechanism, the power source is used to provide power, and the transmission mechanism is used to connect the power source and the baffle 3, which can transmit the power provided by the power source to the baffle 3, so as to drive the baffle 3 to swing back and forth between the first position and the second position. The fixing device includes a first fixing member and a second fixing member, the first fixing member is arranged on the baffle 3, and the second fixing member is arranged on the housing 1. When the baffle 3 is in the first position, the first fixing member and the second fixing member are fixedly connected, so that the baffle 3 is forcibly fixed to the housing 1, and the air outlet 12 remains open.

[0037] The power source may be a cylinder 4, which may be driven by compressed air. The transmission mechanism may be a piston rod 5, one end of which is connected to the piston of the cylinder 4, and the other end of which is hinged to the baffle 3, and the hinged joint between the piston rod 5 and the baffle 3 is the first joint. The first fixing member may be a fixing rod 6, the bottom of which is connected to the baffle 3, and the fixing rod 6 and the baffle 3 may be arranged at an angle, and the joint between the fixing rod 6 and the baffle 3 is the second joint. The spacing between the first joint and the second joint is greater than or equal to 15 cm and less than or equal to 25 cm. For example, the spacing may be 15 cm, 17 cm, 20 cm, 22 cm or 25 cm. Within the spacing range, it is possible to avoid the fixing rod 6 from occupying a larger movement space and to prevent interference with the box 1 during movement.

[0038] The second fixing member may be a nut 7, and correspondingly, the top of the fixing rod 6 has a threaded section. The housing 1 is also provided with a hole 13 at a position corresponding to the top of the fixing rod 6. When the baffle 3 moves to the first position, the threaded section at the top of the fixing rod 6 passes upward through the hole 13 of the housing 1, and the nut 7 is screwed on the threaded section. Through the threaded connection between the nut 7 and the threaded section of the fixing rod 6, the fixing rod 6 and the baffle 3 are forcibly fixed to the housing 1, and the baffle 3 is forcibly fixed to the first position. In order to ensure air tightness, the second fixing member may also include a gasket, which is put on the threaded section at the top of the fixing rod 6 and then the nut 7 is screwed on. When the air inlet 12 needs to be closed, the nut 7 is unscrewed, the gasket is removed, and the cylinder 4 drives the baffle 3 to the second position through the piston rod 5. During this movement, the fixing rod 6 is pulled out of the hole 13 of the housing 1.

[0039] For the bag filter unit, when the cylinder 4 is working, the piston rod 4 can extend outward or retract inward. When extending outward, the piston rod 5 can drive the baffle 3 to move from the first position to the second position; when retracting inward, the piston rod 5 can drive the baffle 3 to move from the second position to the first position. For the baffle 3, the first connection is closer to the first end of the baffle 3 relative to the second connection, and the second connection is closer to the second end of the baffle 3 relative to the first connection. For the box body 1, the central axis of the air inlet 11 and the central axis of the air outlet 12 can be set at an angle.

[0040] For the bag filter unit, the bottom of the fixing rod 6 can be fixed to the baffle 3 or hinged to the baffle 3. The fixing rod 6 can be arranged at an angle to the baffle 3. A hole 13 can be provided on the box body 1 near the cylinder 4, and the hole 13 is located on the movement trajectory of the fixing rod 6. The diameter of the hole 13 matches the outer diameter of the fixing rod 6. For example, the diameter of the hole 13 can be slightly larger than the outer diameter of the fixing rod 6.

[0041] In a replaceable structure, the first fixing member includes a first clamping member provided on the baffle 3, and the second fixing member includes a second clamping member provided on the box body 1. When the baffle 3 moves to the first position, the first clamping member and the second clamping member are clamped and fixed. When the air outlet 12 needs to be closed, the clamping connection can be manually released, or the power provided by the power source can overcome the force between the clamping connections, so that the first and second clamping members are disengaged, so that the baffle 3 can return to the second position.

[0042] In another replaceable structure, the first fixing member includes a first plug-in member provided on the baffle 3, and the second fixing member includes a second plug-in member provided on the box body 1. When the baffle 3 moves to the first position, the first plug-in member and the second plug-in member are plugged in, and the plug-in fixation between the two is achieved by using the friction between the two. When the air outlet 12 needs to be closed, the plug-in fixation can be manually released, or the power provided by the power source can overcome the friction between the two, so that the first and second clamping members are disengaged, so that the baffle 3 can return to the second position.

[0043] In another alternative structure, the first fixing member includes a magnet disposed on the baffle 3, which may be a part of the baffle 3 or may be independently disposed and mounted on the baffle 3, and the second fixing member includes an electromagnet disposed on the box 1. When the baffle 3 moves to the first position, the electromagnet is energized to magnetically fix the baffle 3 to the box 1. When the air outlet 12 needs to be closed, the electromagnet can be de-energized to release the magnetic fixation, so that the baffle 3 can return to the second position.

[0044] In some embodiments, the baffle 3 can move relative to the housing 1. The baffle 3 is arranged inside the housing 1, and is located on the inner side of the air outlet 12. The baffle 3 can reciprocate between a first position and a second position. In the first position, the baffle 3 is separated from the air outlet 12, so that the air outlet 12 is open. In the second position, the baffle 3 closes the air outlet 12, so that the air outlet 12 is closed. The driving device also includes a power source and a transmission mechanism. The power source is fixed to the housing and provides power. The power source is connected to the baffle 3 through the transmission mechanism. Under the drive of the power source, the transmission mechanism drives the baffle 3 to reciprocate between the first position and the second position.

[0045] For the bag filter unit, the bottom of the box 1 is connected with an ash hopper, which is used to hold the dust filtered by the bag filter, and the dust can be discharged when the ash hopper is opened. The bag filter unit can also include a blow pipe, through which compressed gas can blow the dust attached to the filter bag 2 into the ash hopper.

[0046] The embodiment of the present application also provides a bag filter, which includes a plurality of bag filter units arranged in sequence along the airflow direction, and the boxes 1 of two adjacent bag filter units are fixedly connected so that each bag filter unit can be arranged side by side. The number and distribution form of the bag filter units can be combined according to production requirements. When one of the bag filter units fails and needs maintenance, only the unit needs to be shut down, and the other units can continue to work, which will not affect production and is more convenient to repair the failed unit.

[0047] The embodiment of the present application also provides an electrolytic aluminum fume purification system, which includes the bag dust collector, and the bag dust collector can remove and purify the dusty fume generated by the electrolytic aluminum process.

[0048] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the concept of the utility model, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A bag filter unit, characterized in that: include: A box body, wherein the box body has an air inlet and an air outlet; A filter bag, the filter bag is arranged inside the box and between the air inlet and the air outlet; A baffle, the baffle is arranged corresponding to the air outlet and is movably connected to the box; A driving device, the driving device is connected to the baffle plate and can drive the baffle plate to reciprocate between a first position and a second position; A fixing device, the fixing device comprising a first fixing member provided on the baffle and a second fixing member provided on the box body; and, In the first position, the air outlet is open, and the first fixing member and the second fixing member are fixedly connected to fix the baffle to the box body; in the second position, the baffle blocks the air outlet, and the air outlet is closed.

2. The bag filter unit according to claim 1, characterized in that: The central axis of the air inlet is arranged at an angle to the central axis of the air outlet.

3. The bag filter unit according to claim 1, characterized in that: The baffle is rotatably connected to the box body.

4. The bag filter unit according to claim 3, characterized in that: The driving device comprises a cylinder and a piston rod, one end of the piston rod is connected to the piston of the cylinder, and the other end of the piston rod is hinged to the baffle.

5. The bag filter unit according to claim 4, characterized in that: The first fixing member includes a fixing rod, the bottom of the fixing rod is connected to the baffle, the top of the fixing rod has a threaded section, the second fixing member includes a nut, the box body is provided with a hole, in the first position, the threaded section passes through the hole, the nut is threadedly connected to the threaded section and tightly presses the box body.

6. The bag filter unit according to claim 5, characterized in that: The hinged joint between the baffle plate and the piston rod is a first connection, the joint between the baffle plate and the fixing rod is a second connection, and the distance between the first connection and the second connection is greater than or equal to 15 cm and less than or equal to 25 cm.

7. The bag filter unit according to claim 5, characterized in that: The baffle has a first end and a second end that are oppositely arranged, the first end corresponds to an edge of the air outlet, and the second end corresponds to another oppositely arranged edge of the air outlet, the first end is rotatably connected to the box body, and the fixing rod and the piston rod are both located between the first end and the second end.

8. The bag filter unit according to claim 1, characterized in that: In the first position, the first fixing member and the second fixing member are fixed by magnetic attraction, snap connection or plug connection.

9. A bag dust collector, characterized in that: The invention comprises a plurality of bag filter units according to any one of claims 1 to 8 arranged along the air flow direction.

10. An electrolytic aluminum fume purification system, characterized in that: Including the bag dust collector as described in claim 9.

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