CN218741071U - Dust removal device and solar cell production line - Google Patents

Abstract

The application relates to a dust removal device, which comprises an air pipe, wherein the air pipe comprises an ascending section and a descending section which are connected with each other, and the air inlet end of the air pipe is positioned at the descending section; the descending section moves the gas entering from the gas inlet end downwards, and the ascending section moves the gas in the gas pipe upwards; the air pipe is also provided with a water outlet which is arranged at a position where the moving direction of the air in the air pipe is changed from descending to ascending; and the spraying device is positioned in the air pipe and comprises a nozzle positioned in the descending section, and the nozzle is used for spraying liquid. Among the above-mentioned technical scheme, tracheal inlet end is the descending branch, and spray set is provided with the shower nozzle at tracheal inlet end, can be used for to the intratracheal blowout water smoke, increases the gaseous humidity in the trachea, makes behind the dust surface adhesion moisture in the gas, descends more easily, can avoid containing the dust to recharge back in the battery piece processing equipment.

Description

Dust collector and solar cell production line

Technical Field

The application relates to the field of solar cell production and manufacturing, in particular to a dust removal device and a solar cell production line.

Background

In the field of photovoltaic solar cell production and manufacturing, the SE + PERC technology is mature, and comprises two dust-generating processes, wherein one process is that front laser carries out heavy phosphorus doping on a pattern region designed on the front of a solar cell, and the laser can damage the cell to a certain extent and generate a small amount of dust after being started; and secondly, laser grooving is carried out on the back surface plated with the silicon nitride film by using laser light spots according to a designed laser pattern, the silicon nitride which is knocked off by laser can be pumped away in a dust form through a laser dust collector pipeline, and the dust collector pipeline is provided with a dust collecting filter element to intercept dust so as to avoid directly discharging the dust into the natural environment to pollute air.

SUMMERY OF THE UTILITY MODEL

One of the purposes of the embodiments of the present application is to provide a dust removal device for filtering dust generated in the production process of a solar cell, which is implemented by adopting the following technical scheme:

a dust extraction device comprising:

the air pipe comprises an ascending section and a descending section which are connected with each other, and the air inlet end of the air pipe is positioned at the descending section; the descending section moves the gas entering from the gas inlet end downwards, and the ascending section moves the gas in the gas pipe upwards; the air pipe is also provided with a water outlet which is arranged at a position where the moving direction of the air in the air pipe is changed from descending to ascending;

and the spraying device is positioned in the air pipe, and comprises a spray head positioned in the descending section, and the spray head is used for spraying liquid.

Among the above-mentioned technical scheme, tracheal inlet end is located the descending segment, and spray set is provided with the shower nozzle at tracheal descending segment, can be used for to the intratracheal blowout water smoke, increases the gas humidity in the trachea, makes behind the dust surface adhesion moisture in the gas, descends more easily, can avoid containing the dust to recharge back in the battery piece processing equipment.

Furthermore, a plurality of first baffles and second baffles are arranged in the ascending section of the air pipe, the first baffles and the second baffles are alternately and oppositely arranged, and the projections of the first baffles and the second baffles in the extending direction of the air pipe have mutually overlapped areas.

Can carry out the humidification to gas at tracheal descending segment, make the dust part in the gas subside, the inside surface area of trachea can be increased to first baffle and the second baffle that the rethread set up in turn and set up relatively, makes the dust in the gas and the interior surface contact of body and adsorbed probability increase. Make first baffle and second baffle have overlap region in the ascending projection of extending direction of trachea, can increase the number of times that the gas in the trachea turned to when turning to with first baffle, second baffle contact, can make more dusts in the gas subside.

Further, the first baffle is hollow, and the upper surface and the lower surface of the first baffle are provided with through holes which communicate the inside with the outside of the first baffle; the spraying device comprises a spraying pipe, the spraying pipe is used for conveying liquid, and a pipe cavity of the spraying pipe is communicated with the inside of the first baffle.

Among the above-mentioned technical scheme, set up the through-hole and connect in the lumen of shower through the upper and lower surface at first baffle, can spray liquid to the both sides surface of second baffle through first baffle, wash second baffle surface adsorbed dust to the outlet, realize the effect on clean second baffle surface.

Furthermore, a partition plate is arranged inside the ascending section of the air pipe, the partition plate longitudinally divides the inside of the air pipe into an air flow cavity and a dust collection cavity, and the air flow cavity is positioned above the dust collection cavity; one end of the airflow cavity is communicated with the air inlet end of the air pipe, and the other end of the airflow cavity is communicated with the air outlet end of the air pipe; the first baffle and the second baffle are both positioned in the airflow chamber; the lower end of the dust collection chamber is communicated with the water outlet;

the second baffle is obliquely arranged in the vertical direction, the lower end of the second baffle is fixedly connected with the partition, an opening is formed in the position where the second baffle is connected with the partition, and the airflow chamber is communicated with the dust collecting chamber through the opening; the liquid on the upper surface of the second baffle can flow into the dust collection chamber through the opening.

Through setting up the air current cavity in the top of dust collection cavity, can realize collecting the liquid of cavity back row to the outlet with the second baffle upper surface through the dust.

Furthermore, the water outlet is provided with a first filtering device, the first filtering device is used for filtering dust in liquid, a liquid collecting tank is arranged below the first filtering device, the spraying device is connected with a water tank, the liquid collecting tank is connected with the water tank through a pipeline, and a water pump is arranged on the pipeline.

The dust in the liquid is filtered through the first filtering device, then the filtered liquid is collected and sent back to the water tank through a pipeline, and the cyclic utilization of the liquid for settling the dust can be realized.

Further, the first filtering device is connected with the water outlet in a clamping mode.

First filter equipment adopts the mode that the joint is connected with the outlet, can be convenient for dismantle first filter equipment and wash.

Further, a heating device is arranged in the water tank.

Further, the air pipe comprises a plurality of ascending sections and descending sections which are alternately connected.

Further, the air pipe is U-shaped, and the water tank is arranged between the ascending section and the descending section of the air pipe.

The water tank is arranged between the ascending section and the descending section of the air pipe, so that the space can be saved.

The second purpose of this application embodiment is to provide a solar cell's production line for avoid producing the dust that solar cell in-process produced and cause the pollution to the air, adopt following technical scheme to realize:

the production line of the solar cell comprises the dust removal device, and the dust removal device is used for treating waste gas containing dust generated in the production process of the solar cell.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a dust removing device provided in an embodiment of the present application;

fig. 2 is a schematic view of the first baffle and the second baffle provided in the embodiment of the present application, which are projected in the extending direction of the trachea and overlap each other, and completely cover the cross section of the lumen of the trachea;

fig. 3 is one of schematic installation diagrams of the shower pipe and the first baffle according to the embodiment of the present application;

fig. 4 is a second schematic view illustrating an installation of the shower pipe and the first baffle according to the embodiment of the present application.

Icon: 10-trachea; 11-a rising section; 12-a descending section; 13-a water outlet; 14-a separator; 15-a gas flow chamber; 16-a dust collection chamber; 17-a second baffle; 21-a spray pipe; 22-a spray head; 23-a first baffle; 24-spray holes; 30-a first filtration device; 40-a water tank; 41-heating means; 50-a header tank; 60-a pipeline; 61-a second filtration device; 62-water pump.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

In the description of the present application, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when using, and are only used for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.

The inventor of the application discovers that in the process of producing the solar cell by adopting the SE + PERC technology, dust consisting of silicon nitride particles can be generated in the process of carrying out heavy phosphorus doping on a pattern design area on the front side of the solar cell for front side laser and carrying out laser grooving on the back side of the silicon nitride film plated by using laser light spots according to the designed laser pattern. In order to avoid the pollution of dust generated in the two processes to air, the inventor of the application provides a production line for producing solar cells, and the production line adopts an SE + PERC technology to produce the solar cells; the production line is including being used for carrying out the equipment of phosphorus heavy doping to the positive design figure region of solar wafer to and be used for carrying out laser grooving's equipment to the cell piece back, and above-mentioned two kinds of equipment all are connected with dust collector, send into dust collector through the fan with the gas that contains the silicon nitride granule that above-mentioned two kinds of equipment produced, in order to realize detaching the silicon nitride granule in the gas, avoid the air to receive dust pollution.

The dust removal device provided by the inventor of the application comprises an air pipe 10 and a spraying device arranged inside the air pipe 10, wherein gas enters the air pipe 10 from the air inlet end of the air pipe 10, the dust in the gas is reduced after the gas is humidified by the spraying device, and the gas after the dust is removed is discharged from the air outlet end of the air pipe 10. The gas pipe 10 that this application provided includes ascending section 11 and descending section 12, and the in-process of gas from the inlet end of gas pipe 10 to the end motion of giving vent to anger, at descending section 12 part of gas pipe 10, the direction of motion of gas is downwards, and at ascending section 11 part of gas pipe 10, the direction of motion of gas is upwards. In order to avoid that dust sucked into the air pipe 10 flows back to the equipment for processing the battery piece, the air inlet end of the air pipe 10 is positioned at the descending section 12, the part of the spraying device positioned at the descending section 12 is provided with the spray head 22 for spraying liquid to humidify the air, and after the dust surface in the air adsorbs the liquid, the dust surface directly moves downwards along with the air in the sedimentation process, so that the dust flowing back is further avoided, and the efficiency of processing the dust in the air is improved. Suitably, the air tube 10 in the present application is provided with a water outlet 13, and the water outlet 13 is provided at a position in transition from the descending section 12 to the ascending section 11 of the air tube 10. At the position, the moving direction of the gas is changed from downward movement to upward movement; the liquid with dust can be collected to the position from the pipe wall of the air pipe 10, and the water outlet 13 is arranged at the position, so that the liquid in the air pipe 10 can be discharged in time, and the air pipe 10 is prevented from being blocked.

The number of the ascending segments 11 and the descending segments 12 in the air pipe 10 is not limited in the present application, the air pipe 10 only includes one ascending segment 11 and one descending segment 12, and may include a plurality of ascending segments 11 and descending segments 12 alternately arranged, and the air pipe 10 is overall in a wave shape or a zigzag shape. The dust-laden gas is frequently diverted in the gas pipe 10, so that the dust in the gas is more contacted with the pipe wall and adsorbed on the pipe wall, and then the dust is washed away by the water flow formed on the pipe wall by the liquid sprayed by the spraying device.

In some embodiments, in order to achieve frequent turning of the gas in the gas pipe 10, a first baffle 23 and a second baffle 17 are further disposed inside the gas pipe 10, and the first baffle 23 and the second baffle 17 are alternately and oppositely disposed. That is, in the extending direction of the air pipe 10, a second baffle 17 is provided between two adjacent first baffles 23, a first baffle 23 is provided between two adjacent second baffles 17, and the first baffle 23 and the second baffle 17 are respectively provided at two sides of the inner wall of the air pipe 10. In addition, there should be a portion where the projections of the first baffle 23 and the second baffle 17 in the extending direction of the gas pipe 10 overlap each other, so that when the gas moves in the gas pipe 10, the gas needs to continuously contact the first baffle 23 and the second baffle 17 and change the moving direction, and then the gas can be discharged from the gas pipe 10. The mode of setting up first baffle 23 and second baffle 17 through the aforesaid also can increase the number of times that gas turned to in trachea 10 to this increases the probability that the dust contacts with the structure in trachea 10 and is adsorbed in the gas, has improved the clearance of dust.

In order to further improve the dust removal efficiency, for example, as shown in fig. 2, the sizes of the first baffle 23 and the second baffle 17 can be reasonably adjusted, so that after the projections of the first baffle 23 and the second baffle 17 in the extending direction of the trachea 10 are combined, the cross section of the lumen of the trachea 10 can be completely covered; wherein, the cross section of the lumen of the trachea 10 is a section perpendicular to the extending direction of the trachea 10. The dotted straight line shown in fig. 2 is the edge of the first baffle 23, the solid straight line is the edge of the second baffle 17, and the circle is a schematic cross-sectional view of the inner side wall of the gas pipe 10. In particular embodiments, other configurations of the first and second baffles 23, 17, and other cross-sectional shapes of the gas tube 10 may be used by those skilled in the art.

After the dust on the surfaces of the first baffle 23 and the second baffle 17 is accumulated to a certain degree, the adsorption capacity of the dust is reduced, and therefore, the surfaces of the first baffle 23 and the second baffle 17 need to be washed in time.

Since the projections of the first baffle 23 and the second baffle 17 in the extending direction of the air tube 10 overlap each other, if the surfaces of the first baffle 23 and the second baffle 17 are cleaned only by ejecting liquid from the ejection head 22, there are inevitably parts that cannot be washed away.

The present application therefore presents a preferred configuration for the first baffle 23. Preferably, the first baffle 23 is hollow inside, and the upper and lower surfaces of the first baffle 23 each have a through hole communicating the inside of the first baffle 23 with the outside. When the first baffle plate 23 is installed, the inside of the first baffle plate 23 is communicated with a pipe cavity for conveying liquid in the spraying device, so that the liquid can be sprayed out from the upper surface and the lower surface of the first baffle plate 23, and the first baffle plate 23 above and below the second baffle plate 17 respectively cleans the upper surface and the lower surface of the second baffle plate 17 because the first baffle plate 23 and the second baffle plate 17 are alternately arranged.

In the technical scheme provided by the application, no limitation is imposed on whether the first baffle plate 23 and the second baffle plate 17 are horizontally arranged relative to the ground or inclined; when the second baffle 17 is obliquely arranged and the second baffle 17 is installed through the lower end of the position, the accumulated liquid on the upper surface of the second baffle 17 is difficult to drain away in time.

Thus, in some embodiments, the rising section 11 of the gas tube 10 is provided with a baffle 14, the baffle 14 dividing the gas tube 10 into a gas flow chamber 15 and a dust collection chamber 16, the gas flow chamber 15 being located above the dust collection chamber 16. One end of the airflow chamber 15 is communicated with the air inlet end of the air pipe 10, the other end is communicated with the air outlet end of the air pipe 10, and the lower end of the dust collection chamber 16 is communicated with the water outlet 13. The first baffle 23 and the second baffle 17 are both arranged in the airflow chamber 15, the second baffle 17 is obliquely arranged, and the lower end of the second baffle is connected with the partition 14. An opening is further provided in the partition 14 at a position where the second baffle 17 is connected, the opening communicating the airflow chamber 15 with the dust collection chamber 16 for discharging the liquid accumulated at the position of the included angle formed by the second baffle 17 and the partition 14 to the dust collection chamber 16, and finally to the water discharge port 13. Preferably, the upper end of the dust collection chamber 16 is closed to avoid dust-laden gas passing directly into the dust collection chamber 16 without passing through the gas flow chamber 15. In the case where the partition 14 is provided in the gas pipe 10 in this embodiment, it is obvious to those skilled in the art that, in order to remove dust in the gas more effectively, there may be a region where the projections of the first baffle 23 and the second baffle 17 in the extending direction of the gas pipe 10 overlap each other.

In other embodiments, the first baffle 23 and the second baffle 17 can also be disposed on the descending section 12 of the air pipe 10.

In some embodiments, the gas is humidified with water and the second baffle 17 is cleaned. The water tank 40 for containing water is provided with a heating device 41, and the cleaning effect can be improved by heating water.

In some embodiments, the first filtering device 30 is used for filtering solid particles (i.e., dust in gas) in the water flow discharged from the water discharge opening 13, a water collecting tank 50 is disposed below the water discharge opening 13, the water collecting tank 50 is communicated with the water tank 40 through a pipeline 60, and a water pump 62 is connected to the pipeline 60 and is used for conveying water in the water collecting tank 50 to the water tank 40, so as to realize water recycling. To avoid solid particles in the water tank 40, a second filter device 61 may be provided at the end of the conduit 60 in the header tank 50.

The first filtering device 30 and the water outlet 13 are preferably connected in a clamping manner, so that the first filtering device 30 can be conveniently detached and cleaned, the number of the multiple layers of filtering nets with different meshes can be gradually increased from top to bottom by the first filtering device 30, and the multiple layers of filtering nets are installed at the water outlet 13 in a clamping connection manner.

In the above embodiment, the gas is humidified with water and the second shutter 17 is cleaned with water, and the dust removing device and the production line provided by the present application may use other liquid as necessary.

Of course, it is obvious to those skilled in the art that the dust removing device provided by the present application can be used in a process of generating dust in a related production line when other solar cell production technologies are adopted.

The dust removal device provided by the application is not limited to be used in a production line of solar cells, and can be used for treating dust-containing gas in other technical fields.

It should be noted that the features of the embodiments in the present application may be combined with each other without conflict.

Example 1

As shown in fig. 1, the dust removing apparatus provided by the present embodiment includes an air pipe 10, the air pipe 10 includes an ascending section 11 and a descending section 12, and as shown by arrows in the figure, after entering the air pipe 10, the air first moves downwards, and then passes through the ascending section 11 and is discharged from an air outlet end of the air pipe 10. The air pipe 10 has a U-shaped overall shape, and a drain opening 13 is provided at the bottom of the air pipe 10, i.e., at the transition between the rising section 11 and the falling section 12.

A water tank 40 is provided between the rising section 11 and the falling end of the air pipe 10. A shower device is provided inside the air pipe 10. The spraying device comprises a spraying pipe 21, and a plurality of spray heads 22 are arranged in the area, located at the air inlet end of the air pipe 10, of the spraying pipe 21 and used for spraying water mist into the air pipe 10. Both ends of the spray pipe 21 extend out of the air pipe 10 and are embedded into the water tank 40, and a heater is arranged in the water tank 40.

The air outlet end of the air pipe 10 is an ascending section 11, a partition plate 14 extending along the air pipe 10 is arranged in the air outlet end of the air pipe 10, the air outlet end of the air pipe 10 is divided into an air flow cavity 15 and a dust collection cavity 16 by the partition plate 14, and the air flow cavity 15 is located above the dust collection cavity 16. The airflow chamber 15 has two open ends, one end is located above the water outlet 13, and the other end is communicated with the air outlet end of the air tube 10. One end of the dust collection chamber 16 is located above the drain port 13, and the other end is closed.

An array of first baffle plates 23 and an array of second baffle plates 17 are arranged in the airflow chamber 15, the first baffle plates 23 and the second baffle plates 17 are alternately distributed in the extending direction of the air pipe 10, the projections of the first baffle plates 23 and the second baffle plates 17 in the extending direction of the air pipe 10 have overlapping areas, and the first baffle plates 23 and the second baffle plates 17 form repeated zigzag paths in the airflow chamber 15. As shown in fig. 3 and 4, the first baffle 23 is hollow, and has spray holes 24 formed in the upper and lower surfaces thereof, the spray holes 24 being through holes, and the spray holes 24 communicating the inside and the outside of the first surface. The first baffle 23 is fixedly connected with the spray pipe 21 in a welding mode, the inner part of the first baffle 23 is communicated with the pipe cavity of the spray pipe 21, and water in the water tank 40 can reach the inner part of the first baffle 23 through the spray pipe 21 and is discharged from the spray holes 24 on the surface of the first baffle 23.

The water outlet 13 is provided with a first filtering device 30, the first filtering device 30 is composed of three layers of filter screens with gradually increasing meshes from top to bottom, and the filter screens are made of metal and are arranged at the water outlet 13 in a clamping manner. A header tank 50 is provided below the drain port 13, a pipe 60 is connected between the header tank 50 and the water tank 40, and a water pump 62 is provided on the pipe 60.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. A dust removing device characterized by comprising:

the air pipe comprises an ascending section and a descending section which are connected with each other, and the air inlet end of the air pipe is positioned at the descending section; the descending section moves the gas entering from the gas inlet end downwards, and the ascending section moves the gas in the gas pipe upwards; the air pipe is also provided with a water outlet which is arranged at a position where the moving direction of the air in the air pipe is changed from descending to ascending;

and the spraying device is positioned in the air pipe and comprises a nozzle positioned in the descending section, and the nozzle is used for spraying liquid.

2. The dust removing device according to claim 1, wherein a plurality of first baffles and second baffles are arranged in the ascending section of the air tube, the first baffles and the second baffles are arranged alternately and oppositely, and there are areas where projections of the first baffles and the second baffles in the extending direction of the air tube overlap each other.

3. The dust removing apparatus according to claim 2, wherein the first baffle plate is hollow inside, and has through holes on both upper and lower surfaces, the through holes communicating the inside and outside of the first baffle plate; the spraying device comprises a spraying pipe, the spraying pipe is used for conveying liquid, and a pipe cavity of the spraying pipe is communicated with the inside of the first baffle.

4. A dust removing apparatus as claimed in claim 3, wherein a partition is provided in the interior of the ascending section of the air pipe, the partition longitudinally dividing the interior of the air pipe into an air flow chamber and a dust collecting chamber, the air flow chamber being located above the dust collecting chamber; one end of the airflow cavity is communicated with the air inlet end of the air pipe, and the other end of the airflow cavity is communicated with the air outlet end of the air pipe; the first baffle and the second baffle are both located within the airflow chamber; the lower end of the dust collecting chamber is communicated with the water outlet;

the second baffle is obliquely arranged in the vertical direction, the lower end of the second baffle is fixedly connected with the partition, an opening is formed in the position where the second baffle is connected with the partition, and the airflow chamber is communicated with the dust collecting chamber through the opening; the liquid on the upper surface of the second baffle can flow into the dust collection chamber through the opening.

5. The dust removing device according to claim 1, wherein the water outlet is provided with a first filtering device for filtering dust in liquid, a liquid collecting tank is arranged below the first filtering device, the spraying device is connected with a water tank, the liquid collecting tank is connected with the water tank through a pipeline, and a water pump for conveying water in the liquid collecting tank to the water tank is arranged on the pipeline.

6. A dusting device according to claim 5 whereby the first filter means is snap fit to the drain opening.

7. A dust extraction apparatus as claimed in claim 5, wherein heating means is provided in the water tank.

8. A dusting apparatus according to any of claims 1-7, characterized in that the gas pipe comprises a plurality of ascending sections and descending sections alternately connected.

9. A dusting apparatus as claimed in claim 5 wherein said air duct is U-shaped and said water tank is disposed between the ascending section and the descending section of said air duct.

10. A solar cell production line, comprising a dust removing device according to any one of claims 1 to 9, wherein the dust removing device is used for treating dust-containing waste gas generated in the solar cell production process.

Images