CN115852439A - Alumina powder collection device - Google Patents

Abstract

The invention provides an alumina powder collecting device, which belongs to the technical field of electrolytic aluminum equipment. It solves the technical problem of high maintenance and use costs of the existing alumina powder collection device. The alumina powder collection device includes a collection box, the top of the collection box is provided with a feed port, the collection box is provided with a collection pipe that is vertically arranged and can form a negative pressure inside, the collection pipe is provided with a filter net, the lower end of the collection pipe is connected to the The top of the chamber is connected, and the collecting box is provided with a partition between the feed inlet and the collecting pipe. At least two inclined baffles are arranged alternately on the inner walls of the opposite sides of the collecting pipe, and one end of the inclined baffle is fixed on the On the inner wall of the collecting tube, the other end is inclined downward along the axis of the collecting tube and there is a gap between the end and the inner wall of the collecting tube to form a ventilation channel. The filter screen of the invention can maintain excellent filtering effect for a long time, and the cycle of cleaning and replacement is greatly extended, so that the maintenance and use costs of the equipment can be reduced.

Description

A kind of alumina powder collecting device

technical field

The invention belongs to the technical field of electrolytic aluminum equipment and relates to an alumina powder collecting device.

Background technique

Aluminum electrolytic cell is an important part of electrolytic aluminum production equipment. During the production process of aluminum electrolytic cell, alumina powder is easy to accumulate on the upper part of aluminum electrolytic cell, so it needs to be recycled regularly. However, due to the high magnetic field strength of the aluminum electrolytic cell, the existing electric vacuum cleaner cannot be used. Many manufacturers now manually clean the alumina powder on the upper part of the electrolytic cell. Low efficiency and other deficiencies.

In order to facilitate the cleaning of the alumina powder on the upper part of the aluminum electrolytic cell, people have also developed a corresponding collection device. For example, the patent literature discloses a device for absorbing and recovering alumina powder from an aluminum electrolytic cell (application number: 201810821324.X). The alumina powder falls into the conical structure at the lower end of the recovery chamber under the action of gravity, the alumina powder with a smaller mass rises with the airflow, the airflow passes through the air filter and enters the negative pressure chamber, and finally passes through the negative pressure tube and the T-shaped tee The right end of the pipe is discharged into the exhaust muffler, and the alumina powder with a small mass is retained by the filter bag. When the device is working, the gas in the recovery chamber is directly filtered by the air filter and then enters the negative pressure chamber. Since the gas contains alumina powder and impurity dust, more alumina powder and impurity dust will reach the air filter. , it is necessary to install multiple air filters to meet the filtering effect, resulting in higher equipment manufacturing costs, and it is also easy to cause blockage of the air filters, and the cycle of cleaning and replacement is shorter, which leads to higher maintenance and use costs of the equipment.

Contents of the invention

The purpose of the present invention is to solve the above-mentioned problems in the existing technology, and propose an alumina powder collection device. The present invention solves the technical problem of high maintenance and use costs of the existing alumina powder collection device.

The purpose of the present invention can be achieved through the following technical solutions: a collection device for alumina powder, comprising a collection box with a chamber, the top of the collection box is provided with a feed port, the collection box is provided with a vertical And a negative pressure collecting pipe can be formed inside, and a filter screen is arranged in the collecting pipe, and the lower end of the collecting pipe communicates with the top of the containing chamber, and a partition between the feeding port and the collecting pipe is arranged in the collecting box. At least two slanted baffles are arranged alternately on the inner walls of the opposite sides of the collection pipe in turn. One end of the slanted baffles is fixed on the inner wall of the collection pipe, and the other end is along the axis of the collection pipe. The direction of the line is inclined downward and there is a gap between the end and the inner wall of the collecting tube to form a ventilation channel.

When working, the feed port can be connected with a hose, and the hose can be manipulated by the user to align the alumina powder. Under the action of negative pressure in the collection pipe, the alumina powder is sucked into the chamber from the feed inlet, and the alumina powder and dust will be blocked by the partition after entering the chamber, and the partition can prevent the alumina powder from being deposited in the collection chamber. The bottom of the box is directly driven by the airflow into the collection pipe, so that most of the alumina powder quickly sinks to the bottom of the chamber due to its heavy weight, while the dust will continue to move with the gas, and at the same time carry a small part of alumina powder into the collection pipe , the gas entering the collection pipe will pass through the ventilation channel and then reach the filter screen, the filter screen will further filter out the alumina powder in the gas, and the dust will continue to flow with the gas and be discharged from the collection pipe.

In this device, since the slanted baffles are arranged alternately on the inner walls of the opposite sides of the collection pipe in turn, that is, the two adjacent slanted baffles are not facing up and down, so the gas forms an "S" shaped trajectory in the collection pipe. , and the inclined direction of the inclined baffle will guide the alumina powder to sink back into the collection box. Apparently, the structure of the alumina powder collection device can make the alumina powder basically sink back into the collection box before reaching the filter screen through the joint action of the partition plate and a plurality of inclined baffles, and the alumina powder reaching the filter screen There is less powder, so a single filter can meet the filtering requirements, saving the cost of the filter, and the filter can maintain an excellent filtering effect for a long time, and the cycle of cleaning and replacement is greatly extended, so that the maintenance and use costs of the equipment can be reduced reduce.

In the above-mentioned alumina powder collection device, the alumina powder collection device also includes an ejector and an ejector box, and the ejector has an ejected flow inlet, an ejected flow outlet and an outlet for compressed gas to flow in. The main ejector inlet, the ejected inlet is in communication with the upper end of the collecting pipe, and the ejector outlet is located in the ejector box. The ejector is a prior art and can be purchased directly on the market. When the ejector is working, the main jet flow inlet can be connected to a compressed air storage device, such as an air storage tank. The compressed gas enters from the main jet flow inlet, and the ejected flow inlet will generate negative pressure, and the gas in the collection pipe will be sucked into the ejector. , and then discharged from the jet outlet to the ejector box, which can prevent the gas with dust from being discharged directly into the atmosphere.

In the above alumina powder collection device, the ejector box is provided with a filter plate that divides the inner cavity of the ejector box into a left chamber and a right chamber, and the ejector passes through The left chamber, the filter plate and the jet outlet of the ejector are located in the right chamber, and the ejector box is also provided with a filter bag communicating with the left chamber. The gas discharged from the ejector will also contain dust impurities. The gas discharged from the ejector enters the right chamber first, and then flows back to the left chamber. During the backflow process, it passes through the filtering function of the filter plate to filter out part of the dust and impurities. In this design, since the gas discharged from the ejector directly enters the right chamber and impacts the inner wall of the right chamber, the gas and the dust impurities in the gas will not directly impact the filter plate, so that the dust impurities can be better deposited on the ejector inside the box. The gas filtered by the filter plate enters the left chamber and then enters the filter bag. The filter bag further filters the gas, so that the clean gas is discharged from the filter bag, and some fine dust is collected in the filter bag. Preferably, the installation of the filter plate can be inserted and fixed to facilitate disassembly, cleaning and maintenance, and of course other methods can also be used for installation.

In the above-mentioned alumina powder collection device, the bottom of the ejector box is connected with an exhaust pipe, and the upper end of the exhaust pipe communicates with the left chamber of the ejector box, and the exhaust pipe The lower end is connected to the filter bag. Through such a design, the filter bag is installed stably and conveniently.

In the above-mentioned alumina powder collecting device, the number of the inclined baffles is 3-6. Preferably, the number of baffles is four.

In the above-mentioned alumina powder collection device, the collection box is a rectangular box, the partition is rectangular and vertically arranged, and the upper edge of the partition is connected to the inner wall of the top plate of the collection box. Both sides of the partition are connected to the inner side wall of the collection box, and the height of the partition is less than or equal to half of the height of the accommodating chamber. Through this design, when the air with alumina powder and impurities is blocked by the partition, it cannot pass through the partition from the top and both sides of the partition, but can only move down along the partition, which can improve The blocking effect on the alumina powder makes the alumina powder sink to the bottom of the holding chamber and is difficult to enter the collection pipe, ensuring that the filter can maintain excellent filtering effect for a long time. Further, the height of the partition is less than or equal to 1/2 of the height of the chamber, so that the partition can not only form a good blocking effect on the alumina powder, but also leave a sufficient distance between the partition and the bottom surface of the chamber. For the dust to pass through, the dust impurities can enter the collection pipe well, and finally reach the ejector box and the filter bag for separate collection.

In the above-mentioned alumina powder collecting device, the filter bag is a polyester fiber filter bag, and the filter bag includes an obliquely arranged upper half and a vertically arranged lower half, and the upper end of the upper half has a The mouth of the bag where the lower end of the tube is connected. The gas in the ejector box enters the filter bag downwards. At this time, because the upper part of the filter bag is inclined, and the gas has a tendency to flow downward, the gas will hit the side wall of the upper part of the filter bag downwards. , so that the clean gas is better discharged from the filter bag, and the fine dust will eventually be stored in the lower part of the filter bag; at the same time, this design also prevents the gas from directly impacting the lower part of the filter bag, avoiding the direct impact of the gas on the filter The fine dust in the lower part of the bag will cause the fine dust to be raised, thereby improving the filtering effect of the filter bag.

In the above-mentioned alumina powder collection device, a feed pipe communicating with the feed inlet is provided on the top plate of the collection box, and a feed valve is provided on the feed pipe. In the actual operation process, connect the hose to the feed pipe, and use the hose to transport the alumina powder accumulated on the aluminum electrolytic cell to the collection box. The function of the feed valve is to control the connection or cut-off of the feed pipe.

In the above alumina powder collection device, a discharge valve is provided on the bottom side wall of the collection box, and an observation port adjacent to the feed pipe is provided on the top plate of the collection box. The alumina powder enters the collection box from the feed pipe, so the alumina powder is mainly accumulated in the collection box below the feed pipe, and the observation port is set near the feed pipe to observe the collection box more conveniently The material level height of the inner alumina powder, when the material level is high, it is discharged by opening the discharge valve. In the actual production process, the observation port can be blocked by a transparent glass panel, or a valve that can open or close the observation port can also be set on the observation port.

Compared with the prior art, the alumina powder collection device has the following advantages: the structure of the alumina powder collection device can make the alumina powder basically pass through before reaching the filter screen through the joint action of the partition plate and a plurality of inclined baffles. sinks back into the collection box, and less alumina powder reaches the filter net, so the filter net can maintain excellent filtering effect for a long time on the basis of ensuring the filtering effect, and the cycle of cleaning and replacement is greatly extended, making Equipment maintenance and use costs are reduced.

Description of drawings

Fig. 1 is the front view of Embodiment 1 of the alumina powder collection device.

Fig. 2 is a side view of Embodiment 2 of the alumina powder collection device.

Fig. 3 is a top view of Embodiment 2 of the alumina powder collection device.

In the figure, 1. collection box; 1a, accommodation cavity; 1b, feed port; 1c, top plate; 2, collection pipe; 3, filter screen; 4, partition; , ejector; 71, the inlet of the ejected jet; 72, the outlet of the ejected jet; 73, the inlet of the main ejector; 8, the box of the ejector; 81, the left chamber; 82, the right chamber; 9, the filter plate; 10. Filter bag; 101. Upper part; 102. Lower part; 103. Bag mouth; 11. Exhaust pipe; 12. Feed pipe; 13. Feed valve; 14. Unloading valve; 15. Observation port 16. Valve.

Detailed ways

The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

Embodiment one

As shown in Figure 1, the alumina powder collection device includes an ejector 7, an ejector box 8 and a collection box 1 with a housing cavity 1a. The top of the collection box 1 is provided with a feed inlet 1b, and the top plate of the collection box 1 1c is provided with a feed pipe 12 communicating with the feed port 1b, and a feed valve 13 is provided on the feed pipe 12. The side wall at the bottom of the collection box 1 is provided with a discharge valve 14, the top plate 1c of the collection box 1 is provided with an observation port 15 adjacent to the feed pipe 12, and the observation port 15 is provided with a valve that can open or close the observation port 15. valve 16.

As shown in Figure 1, the collection box 1 is a rectangular box, and the collection box 1 is provided with a collection pipe 2 that is vertically arranged and can form a negative pressure inside. The dividing plate 4 between the feed port 1b and the collecting pipe 2, the dividing plate 4 is rectangular and vertically arranged, the upper edge of the dividing plate 4 is connected on the inner wall of the top plate 1c of the collecting box 1, and the both sides of the dividing plate 4 are Connected to the inner wall of the collection box 1, the height of the partition 4 is less than or equal to half of the height of the accommodating chamber 1a. A filter net 3 is provided on the collecting pipe 2, and the lower end of the collecting pipe 2 communicates with the top of the accommodating chamber 1a. At least two slanted baffles 5 are arranged alternately on the inner walls of the opposite sides of the collecting pipe 2. One end of the slanted baffles 5 is fixed on the inner wall of the collecting pipe 2, and the other end is downward along the axis of the collecting pipe 2. It is inclined and there is a gap between the end and the inner wall of the collecting pipe 2 to form a ventilation channel 6 . In this embodiment, the number of inclined baffles 5 in the collection pipe 2 is four. In Fig. 1, the partition plate 4 and the inclined baffle plate 5 cannot be seen from the outside of the collection box 1, so they are indicated by dotted lines.

As shown in Figure 1, the ejector 7 has a jet flow inlet 71, a jet flow outlet 72 and a main jet flow inlet 73 for compressed gas to flow in, the jet flow inlet 71 communicates with the upper end of the collecting pipe 2, and the jet flow The outlet 72 is located in the ejector box 8 . Ejector 7 is prior art, can directly buy and obtain on the market. When the ejector 7 is working, the main ejection inlet 73 can be connected to a compressed air storage device, such as an air storage tank, and the compressed gas enters from the main ejection inlet 73, and the ejected inlet 71 will generate negative pressure, and the The gas is sucked into the ejector 7, and then discharged from the ejector outlet 72 into the ejector box 8. The ejector box 8 can prevent the gas with dust from being directly discharged into the atmosphere.

As shown in Figure 1, the ejector box 8 is provided with a filter plate 9 that divides the inner cavity of the ejector box 8 into a left chamber 81 and a right chamber 82, and the ejector 7 passes through the left chamber successively Chamber 81 and filter plate 9 and the ejector outlet 72 of the ejector 7 are located in the right chamber 82, the bottom of the ejector box 8 is connected with an exhaust pipe 11, and the upper end of the exhaust pipe 11 is connected to the ejector box. The left chamber 81 of 8 is connected, and the lower end of the exhaust pipe 11 is connected with the filter bag 10. Specifically, the filter bag 10 is a polyester fiber filter bag 10 with a cylindrical support frame, the filter bag 10 includes an obliquely arranged upper half 101 and a vertically arranged lower half 102, the upper end of the upper half 101 has a The bag mouth 103 that exhaust pipe 11 lower ends are connected.

During operation, the feed port 1b can be connected with a hose, and the hose can be manipulated by the user to align with the alumina powder. Under the action of the negative pressure in the collection pipe 2, the alumina powder is sucked into the chamber 1a from the feed port 1b, and the alumina powder and dust will be blocked by the partition 4 after entering the chamber 1a, and the partition 4 can avoid oxidation. Before the aluminum powder settles to the bottom of the collection box 1, it is directly driven by the airflow into the collection pipe 2, so that most of the aluminum oxide powder quickly sinks to the bottom of the containing chamber 1a due to its own weight, and the dust will continue to move with the gas, and at the same time Carry a small amount of alumina powder into the collection pipe 2, the gas entering the collection pipe 2 will pass through the ventilation channel 6 and then reach the filter 3, the filter 3 will further filter out the alumina powder in the gas, and the dust will continue to flow with the gas It is discharged from the collection pipe 2 to the right chamber 82 of the ejector box 8, and then returns to the left chamber 81. During the return process, it is filtered by the filter plate 9 to filter out part of the dust and impurities. The gas filtered by the filter plate 9 enters the left chamber 81 and then enters the filter bag 10. The filter bag 10 further filters the gas, so that the clean gas is discharged from the filter bag 10, and some fine dust is collected in the filter bag 10. .

In order to further ensure the dust separation and removal effect in the alumina powder, a dust raising device can be installed inside the collection box 1 to raise the impurity dust, but care should be taken to prevent the dust raising device from raising the alumina powder into the collection pipe 2.

Embodiment two

The structure and principle of this embodiment are basically the same as those of the first embodiment, except that the orientation of the ejector 7 is different from that of the first embodiment. As shown in Figure 2 and Figure 3, the axial direction of the ejector 7 is set parallel to the partition 4, and the installation positions of the corresponding ejector box 8 and filter bag 10 change with the change of the direction of the ejector 7 . The structure of the second embodiment can reduce the width of the device in the left and right directions.

Embodiment three

The structure and principle of this embodiment are basically the same as those of Embodiment 1, except that the number of inclined baffles 5 is three.

Embodiment four

The structure and principle of this embodiment are basically the same as those of Embodiment 1, except that the number of inclined baffles 5 is six.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the present invention or go beyond the definition of the appended claims range.

Although this article uses 1, collection box; 1a, holding chamber; 1b, feed port; 1c, top plate; 2, collection pipe; 3, filter screen; 4, clapboard; Ventilation channel; 7, ejector; 71, ejected jet inlet; 72, ejector outlet; 73, main ejector inlet; 8, ejector box; 81, left chamber; 82, right chamber; 9 , filter plate; 10, filter bag; 101, upper half; 102, lower half; 103, bag mouth; 11, exhaust pipe; 12, feed pipe; 13, feed valve; 14, discharge valve; 15. Observation port; 16. Terms such as valves, but the possibility of using other terms is not excluded. These terms are used only for the purpose of describing and explaining the essence of the present invention more conveniently; interpreting them as any kind of additional limitation is against the spirit of the present invention.

Claims (9)

1. A collection device for alumina powder, comprising a collection box (1) with an accommodating cavity (1a), the top of the collection box (1) is provided with a feed inlet (1b), it is characterized in that the collection box (1) is provided with a collection pipe (2) which is vertically arranged and can form a negative pressure inside, and a filter screen (3) is arranged in the collection pipe (2), and the lower end of the collection pipe (2) is connected with the containing chamber The top of (1a) is communicated, and described collecting box (1) is provided with the dividing plate (4) between feed inlet (1b) and collecting pipe (2), and the opposite two in described collecting pipe (2) At least two slanted baffles (5) are alternately arranged on the side inner wall sequentially, one end of the slanted baffle (5) is fixedly arranged on the inner wall of the collection pipe (2), and the other end is along the inner wall of the collection pipe (2). ) axis direction is inclined downwards and there is a distance between the end and the inner wall of the collection pipe (2) to form a ventilation channel (6). 2. alumina powder collection device according to claim 1, is characterized in that, this alumina powder collection device also comprises ejector (7) and ejector casing (8), and described ejector (7) ) has a jet flow inlet (71), a jet flow outlet (72) and a main jet flow inlet (73) for compressed gas to flow in, and the jet flow inlet (71) is connected to the collection pipe (2) The upper end communicates, and the ejector outlet (72) is located in the ejector box (8). 3. alumina powder collection device according to claim 2, is characterized in that, is provided with in described injector casing (8) and the inner cavity of ejector casing (8) is divided into left chamber ( 81) and the filter plate (9) of the right chamber (82), the ejector (7) passes through the left chamber (81) and the filter plate (9) successively and the injection outlet of the ejector (7) (72) is located in the right chamber (82), and a filter bag (10) communicating with the left chamber (81) is also provided on the ejector box (8). 4. Alumina powder collection device according to claim 3, is characterized in that, the bottom of described ejector casing (8) is connected with exhaust pipe (11), and the upper end of described exhaust pipe (11) It communicates with the left chamber (81) of the ejector box (8), and the lower end of the exhaust pipe (11) is connected with the filter bag (10). 5. The alumina powder collecting device according to any one of claims 1 to 4, characterized in that, the number of the inclined baffles (5) is 3-6. 6. The alumina powder collection device according to any one of claims 1 to 4, characterized in that, the collection box (1) is a rectangular box, and the partition (4) is rectangular and vertical Setting, the upper edge of the partition (4) is connected to the inner wall of the top plate (1c) of the collection box (1), and the two sides of the partition (4) are connected to the inner wall of the collection box (1) Above, the height of the partition (4) is less than or equal to one-half of the housing chamber (1a). 7. The aluminum oxide powder collection device according to claim 4, characterized in that, the filter bag (10) is a polyester fiber filter bag, and the filter bag (10) includes an upper half (101) and a vertical Towards the lower half (102), the upper end of the upper half (101) has a pocket (103) connected to the lower end of the exhaust pipe (11). 8. The alumina powder collection device according to any one of claims 1 to 4, characterized in that, the top plate (1c) of the collection box (1) is provided with a feed port (1b) communicated with A feed pipe (12), on which a feed valve (13) is arranged. 9. alumina powder collecting device according to claim 8, is characterized in that, the sidewall of described collection box (1) bottom is provided with unloading valve (14), and the top plate (1) of described collection box (1) 1c) is provided with an observation port (15) adjacent to the feed pipe (12).

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