Exhaust pipe and solar cell production system

Abstract

The utility model relates to the technical field of exhaust pipes, in particular to an exhaust pipe and a solar cell production system. The exhaust pipe comprises a pipe body, a first fluid director and a flushing mechanism. The pipe body is provided with a pipe wall, an exhaust channel is defined by the pipe wall, an air inlet and an air outlet are formed in the two ends of the exhaust channel respectively, and the exhaust channel is configured to convey alkali-containing gas in the direction from the air inlet to the air outlet. The first fluid director is arranged in the exhaust channel, at least part of the surface of the first fluid director is spaced from the pipe wall, the surface of the first fluid director is obliquely arranged relative to the pipe wall, and the first fluid director is configured to guide alkali-containing gas to flow to the pipe wall. And the flushing mechanism is arranged in the exhaust channel and is opposite to the first fluid director and the pipe wall, and the flushing mechanism is configured to flush the pipe wall and the surface of the first fluid director. In the flushing process, alkali crystals on the pipe wall and the surface of the first fluid director can be dissolved and flushed away, and the exhaust pipe is kept unobstructed by arranging the flushing mechanism.

Description

Technical Field

[0001] This application relates to the field of ventilation duct technology, and in particular to a ventilation duct and a solar cell production system. Background Technology

[0002] In the wet processing stages of solar cell production, such as texturing, alkaline polishing, and cleaning, liquid alkali is required. To ensure the safety of the surrounding environment, negative pressure protection can be created in the liquid alkali area using exhaust ventilation. During ventilation, the alkaline water mist will form alkali crystals on the inner wall of the exhaust duct. These alkali crystals can cause blockage of the exhaust duct, affecting the normal operation of the equipment. Utility Model Content

[0003] This application discloses an exhaust duct and a solar cell production system that can keep the exhaust duct unobstructed.

[0004] To achieve the above objectives, in a first aspect, embodiments of this application disclose an exhaust duct, comprising:

[0005] The pipe body has a pipe wall that defines an exhaust channel. An air inlet and an air outlet are respectively provided at both ends of the exhaust channel. The exhaust channel is configured to transport alkaline gas in the direction from the air inlet to the air outlet.

[0006] A first guide vane is disposed within the exhaust duct, with at least a portion of its surface spaced apart from the pipe wall. The surface of the first guide vane is inclined relative to the pipe wall. The first guide vane is configured to guide the alkaline gas toward the pipe wall.

[0007] A flushing mechanism is disposed within the exhaust duct and opposite to the first guide vane and the pipe wall. The flushing mechanism is configured to flush the surface of the pipe wall and the first guide vane.

[0008] In one possible implementation of the first aspect, the exhaust duct further includes:

[0009] A second flow guide is disposed within the exhaust duct and on the side of the first flow guide away from the air inlet. At least a portion of the surface of the second flow guide is spaced apart from the pipe wall, and the surface of the second flow guide is inclined relative to the pipe wall. The second flow guide is configured to guide the alkaline gas to flow toward the pipe wall. A flushing mechanism is disposed opposite to the second flow guide and is further configured to flush the surface of the second flow guide.

[0010] In a possible implementation of the first aspect, the first guide has a first guide surface on the side facing the air inlet, the periphery of the first guide surface extending from the air inlet to the air outlet relative to the center of the first guide surface, and the periphery of the first guide surface inclined towards the pipe wall relative to the center of the first guide surface; the first guide surface is configured to guide the alkaline gas to flow toward the pipe wall.

[0011] And / or, the first guide vane has a second guide surface on the side opposite to the air inlet, the periphery of the second guide surface is connected to the periphery of the first guide surface, the center of the second guide surface extends relative to the periphery of the second guide surface in a direction from the air inlet to the air outlet, and the center of the second guide surface is inclined relative to the periphery of the second guide surface in a direction away from the pipe wall; the second guide surface is configured to guide the alkaline gas to flow from the periphery of the second guide surface to the center of the second guide surface for mixing;

[0012] And / or, the second flow guide has a third flow guiding surface on the side facing the first flow guide, the periphery of the third flow guiding surface extending in the direction from the air inlet to the air outlet relative to the center of the third flow guiding surface, and the periphery of the third flow guiding surface inclined towards the pipe wall relative to the center of the third flow guiding surface; the third flow guiding surface is configured to guide the alkaline gas to flow towards the pipe wall;

[0013] And / or, the second flow guide has a fourth flow guiding surface on the side opposite to the first flow guide, the periphery of the fourth flow guiding surface is connected to the periphery of the third flow guiding surface, the center of the fourth flow guiding surface extends relative to the periphery of the fourth flow guiding surface in the direction from the air inlet to the air outlet, and the center of the fourth flow guiding surface is inclined relative to the periphery of the fourth flow guiding surface in a direction away from the pipe wall; the fourth flow guiding surface is configured to guide the alkaline gas to flow from the periphery of the fourth flow guiding surface to the center of the fourth flow guiding surface for mixing.

[0014] In one possible implementation of the first aspect, the first flow guide is spindle-shaped, elliptical, or spherical;

[0015] And / or, the second flow guide is spindle-shaped, elliptical, or spherical;

[0016] And / or, the first flow guide is separated from the pipe wall on all four sides, and a first support member is connected between the first flow guide and the pipe wall;

[0017] And / or, the second flow guide is separated from the pipe wall on all four sides, and a second support is connected between the second flow guide and the pipe wall.

[0018] In a possible implementation of the first aspect, the exhaust duct is arranged vertically, the flushing mechanism is disposed above the second guide vane, the second guide vane is disposed above the first guide vane, the flushing mechanism is configured to spray flushing fluid onto the surface of the second guide vane and the pipe wall above the second guide vane, and the second guide vane is further configured to guide the flushing fluid to flow toward the surface of the first guide vane.

[0019] In one possible implementation of the first aspect, the rinsing mechanism includes:

[0020] A first spray structure is disposed corresponding to the pipe wall above the second guide vane, and the first spray structure is configured to spray the flushing liquid onto the pipe wall above the second guide vane; and

[0021] A second spray structure is provided corresponding to the second guide tube, and the second spray hole is configured to spray the rinsing liquid onto the middle part of the side surface of the second guide tube opposite to the first guide tube.

[0022] In a possible implementation of the first aspect, the first spray structure includes an annular water pipe that surrounds the pipe wall and is disposed on the inner side of the pipe wall, and the annular water pipe is provided with a plurality of first spray holes, the first spray holes being configured to spray the rinsing liquid onto the pipe wall;

[0023] The second spray structure includes a vertical water pipe, the vertical water pipe, the second guide and the first guide are arranged from top to bottom, the vertical water pipe extends in a direction close to the second guide, and the vertical water pipe is provided with a second spray hole, the second spray hole is configured to spray the rinsing liquid onto the middle part of the side surface of the second guide away from the first guide.

[0024] In one possible implementation of the first aspect, the rinsing mechanism further includes a water inlet manifold, on which a solenoid valve is provided. Both the annular water pipe and the vertical water pipe are connected to the water inlet manifold. The water inlet manifold is configured to be connected to a waste acid source so that the waste acid in the waste acid source is used as the rinsing liquid.

[0025] In one possible implementation of the first aspect, the upper end of the vertical water pipe is located between the inner circumferences of the annular water pipe, and the upper end of the vertical water pipe is further provided with a third spray hole, which is configured to spray the rinsing liquid onto the annular water pipe and the vertical water pipe.

[0026] In a possible implementation of the first aspect, a first liquid guiding connector is connected between the first guide and the second guide. The upper end of the first liquid guiding connector is connected to the middle of the side surface of the second guide facing the first guide, and the lower end of the first liquid guiding connector is connected to the middle of the side surface of the first guide away from the air inlet. The first liquid guiding connector is configured to guide the flushing liquid on the surface of the second guide to flow to the surface of the first guide.

[0027] The bottom end of the first flow guide is provided with a second liquid guiding connector, and a collection groove is provided on the pipe wall. In the vertical direction, the collection groove is located between the first flow guide and the air inlet. In the horizontal direction, the collection groove is located on the periphery of the air inlet. The bottom end of the second liquid guiding connector is connected to the collection groove, and the collection groove is provided with a drain section.

[0028] In one possible implementation of the first aspect, the tube is a cylindrical tube with a length of L and a diameter of D; wherein, 3≤L / D≤6;

[0029] And / or, the material of the pipe body is any one of PFA, PP, PPH or PVC;

[0030] And / or, the two ends of the pipe body are respectively provided with a first connecting flange and a second connecting flange, and the air inlet and air outlet are respectively located at the two ends of the pipe body.

[0031] Secondly, embodiments of this application disclose a solar cell production system, including:

[0032] A wet process equipment, the wet process equipment being configured to process solar cells using an alkaline solution, the wet process equipment having an exhaust port configured to discharge the alkaline gas;

[0033] As described in the first aspect, the exhaust duct, wherein the air inlet is connected to the exhaust port; and

[0034] A waste acid source is provided, and the rinsing mechanism is connected to the waste acid source, which is configured to provide waste acid to the rinsing mechanism.

[0035] Compared with the prior art, the beneficial effects of this application are as follows: The exhaust duct, by setting a first guide within the exhaust channel, with the surface of the first guide inclined relative to the duct wall, is configured to guide the alkaline gas towards the duct wall. It is understood that the alkaline gas is guided towards the duct wall by the surface of the first guide. During this process, due to the contact between the alkaline gas and the surface of the first guide and the duct wall, alkali crystallizes on the surface of the first guide and the duct wall. That is, the alkali in the alkaline gas is captured by the surface of the first guide and the duct wall, thereby reducing the alkali content in the gas before it is discharged through the exhaust port.

[0036] To prevent alkali crystals from clogging the exhaust duct, a flushing mechanism is installed within the exhaust duct. This mechanism is configured to flush the duct wall and the surface of the first guide vane. The flushing process dissolves and removes alkali crystals from the duct wall and the surface of the first guide vane, thus maintaining the unobstructed flow of the exhaust duct. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a structural schematic diagram of an exhaust duct disclosed in the first aspect of this application;

[0039] Figure 2 This is a schematic diagram of the flow of alkaline gas in the exhaust pipe disclosed in the first aspect of this application;

[0040] Figure 3 This is a schematic diagram showing the flow of the flushing fluid in the exhaust pipe disclosed in the first aspect of this application;

[0041] Figure 4 This is a schematic diagram of the rinsing mechanism disclosed in the first aspect of this application;

[0042] Figure 5 This is a schematic diagram of the structure of a solar cell production system disclosed in the second aspect of this application.

[0043] Explanation of reference numerals in the attached figures:

[0044] 10. Exhaust duct; 11. Pipe body; 111. Pipe wall; 112. Exhaust channel; 113. Air inlet; 114. Exhaust outlet; 115. Collection tank; 116. Drainage section; 117. First connecting flange; 118. Second connecting flange; 12. First guide vane; 121. First guide surface; 122. Second guide surface; 13. Flushing mechanism; 131. First spray structure; 1311. Annular water pipe; 1312. First spray hole; 132. Second spray structure Structure; 1321, Vertical water pipe; 1322, Second spray hole; 1323, Third spray hole; 133, Inlet manifold; 134, Solenoid valve; 14, Second guide; 141, Third guide surface; 142, Fourth guide surface; 15, First support; 16, Second support; 17, First liquid guide connector; 18, Second liquid guide connector; Y, Vertical direction; X, Horizontal direction; 20, Waste acid source; 30, Wet process equipment; 31, Exhaust port. Detailed Implementation

[0045] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0046] In this application, the terms "upper," "lower," "bottom," "inner," "outer," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0047] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0048] Furthermore, the terms "set up," "equipped with," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0049] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0050] The technical solution of this utility model will be described below with reference to the embodiments and accompanying drawings.

[0051] Firstly, see [the following] Figure 1 and Figure 2 This application discloses an exhaust pipe 10, which includes a pipe body 11, a first flow guide 12, and a flushing mechanism 13.

[0052] The pipe body 11 has a pipe wall 111, which defines an exhaust channel 112. The exhaust channel 112 has an air inlet 113 and an air outlet 114 at its two ends, and the exhaust channel 112 is configured to transport alkaline gas in the direction from the air inlet 113 to the air outlet 114.

[0053] The first guide 12 is disposed in the exhaust channel 112, and at least part of the surface of the first guide 12 is spaced apart from the pipe wall 111. The surface of the first guide 12 is inclined relative to the pipe wall 111. The first guide 12 is configured to guide the alkaline gas to flow toward the pipe wall 111.

[0054] The flushing mechanism 13 is disposed in the exhaust duct 112 and is disposed opposite to the first guide 12 and the pipe wall 111. The flushing mechanism 13 is configured to flush the surface of the pipe wall 111 and the first guide 12.

[0055] It should be noted that the term "alkali-containing gas" can refer to a mixture of gases containing alkali, such as a mixture of alkali-containing water mist and air, and the alkali contained may be, for example, sodium hydroxide or potassium hydroxide.

[0056] The exhaust duct 10 incorporates a first guide vane 12 within the exhaust channel 112. The surface of the first guide vane 12 is inclined relative to the duct wall 111, and the first guide vane 12 is configured to guide the alkaline gas towards the duct wall 111. Understandably, the alkaline gas is guided towards the duct wall 111 by the surface of the first guide vane 12. During this process, due to the contact between the alkaline gas and the surface of the first guide vane 12 and the duct wall 111, alkali crystallizes on these surfaces. In other words, the alkali in the alkaline gas is captured by the surface of the first guide vane 12 and the duct wall 111, reducing the alkali content in the gas before it is discharged through the exhaust port 114. The first guide vane 12 effectively improves the capture efficiency.

[0057] To prevent alkali crystals from clogging the exhaust duct 112, the exhaust duct 10 is equipped with a flushing mechanism 13 within the exhaust duct 112. The flushing mechanism 13 is configured to flush the surface of the duct wall 111 and the first guide vane 12. For example, the flushing mechanism 13 is selected from any one or a combination of several of a spray pipe, a spray hole, a spray nozzle, or a spray shower head. It is understood that the flushing process dissolves and washes away alkali crystals on the surface of the duct wall 111 and the first guide vane 12, and the exhaust duct 10 is kept unobstructed by the flushing mechanism 13.

[0058] In some embodiments, such as Figure 1 and Figure 2 As shown, the exhaust duct 10 also includes a second guide vane 14, which is disposed within the exhaust channel 112 and located on the side of the first guide vane 12 away from the air inlet 113. At least a portion of the surface of the second guide vane 14 is spaced apart from the duct wall 111, and the surface of the second guide vane 14 is inclined relative to the duct wall 111. The second guide vane 14 is configured to guide the alkaline gas to flow towards the duct wall 111. A flushing mechanism 13 is disposed opposite to the second guide vane 14, and the flushing mechanism 13 is also configured to flush the surface of the second guide vane 14.

[0059] The exhaust duct 10 further improves the alkali capture efficiency by providing a second guide 14 to redirect the alkaline gas flow to the duct wall 111. Correspondingly, the alkali also crystallizes on the surface of the second guide 14, and the flushing mechanism 13 is also configured to flush the surface of the second guide 14 to keep the exhaust duct 10 unobstructed.

[0060] It should be noted that, as Figure 1 and Figure 2 As shown, the number of the first flow guide 12 and the second flow guide 14 can be one, so as to efficiently capture alkali, which is beneficial to the smoothness of exhaust and has little negative pressure reduction, i.e., low pressure loss.

[0061] Of course, there can be multiple first and second air guides. When there are multiple first and second air guides, they are spaced apart along the direction from the air inlet to the air outlet.

[0062] See the embodiments in this application for details. Figure 1 and Figure 2 The first guide vane 12 has a first guide surface 121 on the side facing the air inlet 113. The periphery of the first guide surface 121 extends from the air inlet 113 to the air outlet 114 relative to its center, and the periphery of the first guide surface 121 is inclined towards the pipe wall 111 relative to its center. The first guide surface 121 is configured to guide the alkaline gas to flow towards the pipe wall 111.

[0063] It is understood that the alkaline gas input through the air inlet 113 is guided by the first guide surface 121 from the center of the first guide surface 121 to the pipe wall 111. During this process, the high-speed airflow will lower the temperature of the alkaline water mist in the alkaline gas, and the moisture will continue to evaporate. The alkali will crystallize on the first guide surface 121 and the pipe wall 111. The first guide surface 121 and the pipe wall 111 can capture most of the alkali.

[0064] Even after the alkaline gas is treated by the first guide surface 121, some alkalinity may still remain, and the alkaline components are not evenly distributed in the alkaline gas, which in turn affects the capture of alkalinity by the second guide 14.

[0065] Based on the above analysis, in this embodiment, the first guide vane 12 has a second guide surface 122 on the side opposite to the air inlet 113. The periphery of the second guide surface 122 is connected to the periphery of the first guide surface 121. The center of the second guide surface 122 extends relative to its periphery along the direction from the air inlet 113 to the air outlet 114, and the center of the second guide surface 122 is inclined relative to its periphery in a direction away from the pipe wall 111. The second guide surface 122 is configured to guide the alkaline gas to flow from its periphery to its center for mixing.

[0066] It is understandable that the alkaline gas is blocked by the pipe wall 111 and then flows from the periphery of the second guide surface 122 to the center of the second guide surface 122, where the alkaline gas is concentrated and fully mixed.

[0067] Furthermore, the second guide vane 14 has a third guide surface 141 on the side facing the first guide vane 12. The periphery of the third guide surface 141 extends relative to its center in a direction from the air inlet 113 to the air outlet 114, and the periphery of the third guide surface 141 is inclined relative to its center towards the pipe wall 111. The third guide surface 141 is configured to guide the alkaline gas to flow towards the pipe wall 111.

[0068] The alkaline gas mixed on the second guide surface 122 continues to be transported and flows from the center of the third guide surface 141 to the periphery of the third guide surface 141, and then from the periphery of the third guide surface 141 to the pipe wall 111. During this process, the alkali continues to crystallize in the third guide surface 141 and the pipe wall 111 to further reduce the alkali content in the alkaline gas.

[0069] After treatment by the third guide surface 141, the alkali content in the alkali-containing gas is already low, but it may still not meet the emission standards.

[0070] Based on this, the second guide vane 14 has a fourth guide surface 142 on the side opposite to the first guide vane 12. The periphery of the fourth guide surface 142 is connected to the periphery of the third guide surface 141. The center of the fourth guide surface 142 extends relative to its periphery along the direction from the air inlet 113 to the air outlet 114, and the center of the fourth guide surface 142 is inclined away from the pipe wall 111 relative to its periphery. The fourth guide surface 142 is configured to guide the alkaline gas to flow from its periphery to its center for mixing.

[0071] It is understandable that the alkaline gas, after being blocked by the pipe wall 111 and deflected back, flows from the periphery of the fourth guide surface 142 to the center of the fourth guide surface 142, where it concentrates and mixes thoroughly. Furthermore, since the flushing mechanism 13 is positioned opposite the second guide 14, the re-mixed alkaline gas forms alkali crystals on the surface of the flushing mechanism 13, effectively using the flushing mechanism 13 as a alkali-capturing element. Additionally, since the flushing mechanism 13 itself can spray, it can also flush itself, simplifying the structure.

[0072] For example, in Figure 1 and Figure 2 In this design, the first guide vane 12 and the second guide vane 14 are spindle-shaped. The spindle-shaped first guide vane 12 and the second guide vane 14 are fluid-oriented and can reduce the flow resistance of alkaline gases. As another example, the first guide vane and / or the second guide vane can also be elliptical or spherical.

[0073] Furthermore, in Figure 1 In this configuration, the first guide vane 12 and the second guide vane 14 are both separated from the pipe wall 111 on all four sides, allowing alkaline gas to flow through the gaps between the first and second guide vanes 12 and the pipe wall 111, thus improving treatment efficiency. A first support member 15 connects the first guide vane 12 and the pipe wall 111. A second support member 16 connects the second guide vane 14 and the pipe wall 111. The first support member 15 and the second support member 16 respectively suspend the first guide vane 12 and the second guide vane 14 within the exhaust duct 112. Optionally, the first support member 15 and the second support member 16 can be a support rod, a support frame, a support mesh, or a support plate.

[0074] In some embodiments, see Figure 1 The pipe body 11 is a cylindrical pipe with a length of L and a diameter of D. Among them, 3≤L / D≤6, where L / D is the length-to-diameter ratio. The pipe body 11 with this length-to-diameter ratio has a better exhaust effect.

[0075] Preferably, the tube body 11 is made of any one of PFA (Perfluoroalkoxy), PP (Polypropylene), PPH (Polypropylene Homopolymer), or PVC (Polyvinyl Chloride). Tube bodies 11 made of these materials are resistant to acid and alkali corrosion.

[0076] More specifically, the pipe body 11 has a first connecting flange 117 and a second connecting flange 118 at both ends, and an air inlet 113 and an air outlet 114 are located at both ends of the pipe body 11. The pipe body 11 is connected to equipment or pipelines through the first connecting flange 117 and the second connecting flange 118.

[0077] Optionally, the pipe body 11 can be arranged along the vertical direction Y, or inclined to the vertical direction Y, or the pipe body 11 can also be arranged along the horizontal direction X. In the embodiment of this application, the exhaust channel 112 and the pipe body 11 are arranged in the same direction.

[0078] In some embodiments, please combine Figure 3 and Figure 4 The exhaust duct 112 is arranged vertically, and the flushing mechanism 13 is arranged above the second guide 14. The second guide 14 is arranged above the first guide 12. The flushing mechanism 13 is configured to spray flushing liquid onto the surface of the second guide 14 and the pipe wall 111 above the second guide 14. The second guide 14 is also configured to guide the flushing liquid to flow to the surface of the first guide 12.

[0079] The vertical setting of the exhaust duct 112 can be understood as: the exhaust duct 112 is set along the vertical direction Y, or the exhaust duct 112 is inclined to the vertical direction Y and the angle between it and the vertical direction Y is less than 90°.

[0080] In this embodiment, the rinsing mechanism 13 sprays water from above the second guide vane 14. The rinsing liquid flows from the second guide vane 14 to the first guide vane 12 under gravity, while the pipe wall 111 is rinsed from top to bottom by the rinsing liquid sprayed by the rinsing mechanism 13. This means that one rinsing mechanism 13 can rinse the first guide vane 12, the second guide vane 14, and most of the pipe wall 111, eliminating the need for multiple rinsing mechanisms 13 and further simplifying the structure. Furthermore, the rinsing liquid, falling under gravity, washes away alkali crystals, improving the removal efficiency of alkali crystals.

[0081] Furthermore, the rinsing mechanism 13 includes a first spray structure 131 and a second spray structure 132. The first spray structure 131 is correspondingly disposed on the pipe wall 111 above the second guide 14, and is configured to spray rinsing fluid onto the pipe wall 111 above the second guide 14. The second spray structure 132 is correspondingly disposed on the second guide 14, and is configured to spray rinsing fluid onto the surface of the second guide 14. In this embodiment, the rinsing fluid can be acid or water; the first spray structure 131 and the second spray structure 132 can be spray pipes, nozzles, spray showers, etc. This rinsing structure uses the first spray structure 131 to specifically rinse the pipe wall 111, and uses the second spray structure 132 to specifically rinse the second guide 14 and the first guide 12, in order to remove alkali crystals point-to-point and reduce blockage of the exhaust pipe 10.

[0082] Please combine Figure 3 and Figure 4 The first spray structure 131 includes an annular water pipe 1311, which surrounds the pipe wall 111 and is disposed on the inner side of the pipe wall 111. The annular water pipe 1311 is provided with a plurality of first spray holes 1312, which are configured to spray rinsing liquid onto the pipe wall 111.

[0083] Since there are alkali crystals on the pipe wall 111 at various positions in its circumference, the multiple first spray holes 1312 on the annular water pipe 1311 can spray and rinse the pipe wall 111 at multiple positions in its circumference to remove the alkali crystals on the pipe wall 111 in an all-round way.

[0084] Please combine Figure 3 and Figure 4 The second spray structure 132 includes a vertical water pipe 1321. The vertical water pipe 1321, the second guide 14 and the first guide 12 are arranged from top to bottom. The vertical water pipe 1321 extends towards the second guide 14. The vertical water pipe 1321 is provided with a second spray hole 1322. The second spray hole 1322 is configured to spray rinsing liquid onto the middle part of the side surface of the second guide 14 away from the first guide 12.

[0085] Since the surface of the second guide 14 facing away from the first guide 12 is the fourth guide surface 142, the second spray hole 1322 sprays rinsing liquid onto the center of the fourth guide surface 142. Understandably, due to the guidance of the fourth guide surface 142, the rinsing liquid flows from the center of the fourth guide surface 142 to its periphery, thus thoroughly rinsing the fourth guide surface 142. Then, the rinsing liquid flows from the periphery of the fourth guide surface 142 to the periphery of the third guide surface 141, and from the periphery of the third guide surface 141 to its center, thus thoroughly rinsing the third guide surface 141. In other words, the surface shape of the second guide 14 not only improves its alkali capture efficiency but also makes it easier to rinse.

[0086] Furthermore, the flushing mechanism 13 also includes an inlet manifold 133, on which a solenoid valve 134 is provided. The annular water pipe 1311 and the vertical water pipe 1321 are both connected to the inlet manifold 133. The inlet manifold 133 is configured to be connected to a waste acid source, so that the waste acid in the waste acid source is used as the flushing liquid.

[0087] In solar cell production lines, in addition to using alkalis to process solar cells, acids such as hydrochloric acid and hydrofluoric acid are also used. These waste acids can neutralize alkali crystals, quickly removing them and generating environmentally friendly salts. This application utilizes waste acid as a rinsing fluid to cleverly neutralize the waste alkali and waste acid generated during solar cell production, reducing the environmental costs of separately treating these waste alkalis and waste acids.

[0088] More specifically, after the exhaust pipe 10 discharges alkaline gas for a certain period of time, the solenoid valve 134 opens the inlet manifold 133, and the waste acid liquid in the waste acid liquid source enters the annular water pipe 1311 and the vertical water pipe 1321 through the inlet manifold 133. Then, the annular water pipe 1311 and the vertical water pipe 1321 spray out waste acid liquid respectively to flush the pipe wall 111, the second guide 14 and the first guide 12.

[0089] In some embodiments, please combine Figure 3 and Figure 4 The upper end of the vertical water pipe 1321 is located between the inner circumference of the annular water pipe 1311. The upper end of the vertical water pipe 1321 is also provided with a third spray hole 1323, which is configured to spray flushing liquid onto the annular water pipe 1311 and the vertical water pipe 1321.

[0090] As described above, after the alkaline gas is mixed through the fourth guide surface 142, it continues to form alkaline crystals on the rinsing mechanism 13. The alkaline crystals are specifically formed on the annular water pipe 1311 and the vertical water pipe 1321. When the third spray hole at the upper end of the vertical water pipe 1321 is opened, the sprayed rinsing liquid not only rinses the vertical water pipe 1321 downwards, but also rinses the annular water pipe 1311 in all directions, thereby dissolving the alkaline crystals on the rinsing mechanism 13, making the rinsing more comprehensive.

[0091] Furthermore, such as Figure 3 As shown, a first liquid guiding connector 17 is connected between the first flow guide 12 and the second flow guide 14. The upper end of the first liquid guiding connector 17 is connected to the middle of the side surface of the second flow guide 14 facing the first flow guide 12, and the lower end of the first liquid guiding connector 17 is connected to the middle of the side surface of the first flow guide 12 away from the air inlet 113. The first liquid guiding connector 17 is configured to guide the flushing liquid on the surface of the second flow guide 14 to flow to the surface of the first flow guide 12.

[0092] The first fluid guide connector 17 is used to guide the flushing fluid on the second guide 14 to the surface of the first guide 12.

[0093] More specifically, the upper end of the first liquid guiding connector 17 is connected to the middle of the third guiding surface 141, and the lower end of the first liquid guiding connector 17 is connected to the middle of the second guiding surface 122. The rinsing liquid around the second guiding surface 122 gathers to the middle of the third guiding surface 141. Then, the first liquid guiding connector 17 guides the rinsing liquid to flow to the middle of the second guiding surface 122. The rinsing liquid reaching the middle of the second guiding surface 122 continues to disperse to the periphery of the second guiding surface 122 for rinsing, then flows to the periphery of the first guiding surface 121, and finally gathers from the periphery of the first guiding surface 121 to the middle of the first guiding surface 121. In other words, the surface shape design of the first guide 12 and the second guide 14 enables the rinsing liquid to efficiently and comprehensively rinse their surfaces.

[0094] The bottom end of the first flow guide 12 is provided with a second liquid guiding connector 18, and the pipe wall 111 is provided with a collection tank 115. In the vertical direction Y, the collection tank 115 is located between the first flow guide 12 and the air inlet 113. In the horizontal direction X, the collection tank 115 is located on the periphery of the air inlet 113. The bottom end of the second liquid guiding connector 18 is connected to the collection tank 115, and the collection tank 115 is provided with a drain section 116.

[0095] The second liquid guiding connector 18 is used to guide the flushing liquid on the first guide 12 to collect in the collection tank 115, and the flushing liquid on the pipe wall 111 also collects in the collection tank 115, and finally discharges from the pipe body 11 through the drain section 116. The drain section 116 is, for example, a drain outlet or a drain pipe. Setting the collection tank 115 around the air inlet 113 can prevent the flushing liquid from flowing back into the process equipment through the air inlet 113 and causing pollution.

[0096] In some embodiments, such as Figure 3 As shown, the bottom end of the second liquid guiding connector 18 is the middle part of the first flow guiding surface 121. Accordingly, the flushing liquid that gathers from the periphery of the first flow guiding surface 121 to the middle part of the first flow guiding surface 121 is introduced into the collection tank 115 through the second liquid guiding connector 18.

[0097] For example, the first liquid guiding connector 17 and the second liquid guiding connector 18 may be a liquid guiding connecting rod, a liquid guiding connecting plate, a liquid guiding connecting groove, or a liquid guiding connecting pipe.

[0098] Secondly, see Figure 5 This application discloses a solar cell production system, including a wet process equipment 30, an exhaust pipe 10 as described in the first aspect, and a waste acid source 20.

[0099] The wet process equipment 30 is configured to process solar cells using alkaline solution. The wet process equipment 30 has an exhaust port 31 configured to discharge alkaline gas. An air inlet 113 is connected to the exhaust port 31, and an exhaust pipe 10 can draw in alkaline gas from the exhaust port 31 under negative pressure. A rinsing mechanism 13 is connected to a waste acid source 20, which is configured to supply waste acid to the rinsing mechanism 13.

[0100] More specifically, the wet process equipment 30 is, for example, a texturing machine, an alkaline polishing machine, or a cleaning machine. The waste acid source 20 is, for example, an acidic wastewater network, an acidic wastewater pool, or an acidic wastewater tank, etc. The waste acid is, for example, one or more of hydrochloric acid, hydrofluoric acid, or sulfuric acid.

[0101] The solar cell production system introduces waste acid from waste acid source 20 into flushing mechanism 13, so that flushing mechanism 13 uses waste acid to flush exhaust pipe 10, thus reusing waste acid and reducing the environmental cost of separate treatment of waste acid and waste alkali.

[0102] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An exhaust duct, characterized in that, include: The pipe body has a pipe wall that defines an exhaust channel. An air inlet and an air outlet are respectively provided at both ends of the exhaust channel. The exhaust channel is configured to transport alkaline gas in the direction from the air inlet to the air outlet. A first guide is disposed within the exhaust duct, and at least a portion of the surface of the first guide is spaced apart from the pipe wall. The surface of the first guide is inclined relative to the pipe wall. The first guide is configured to guide the alkaline gas to flow toward the pipe wall. as well as A flushing mechanism is disposed within the exhaust duct and opposite to the first guide vane and the pipe wall. The flushing mechanism is configured to flush the surface of the pipe wall and the first guide vane.

2. The exhaust duct according to claim 1, characterized in that, The exhaust pipe also includes: A second flow guide is disposed within the exhaust duct and on the side of the first flow guide away from the air inlet. At least a portion of the surface of the second flow guide is spaced apart from the pipe wall, and the surface of the second flow guide is inclined relative to the pipe wall. The second flow guide is configured to guide the alkaline gas to flow toward the pipe wall. A flushing mechanism is disposed opposite to the second flow guide and is further configured to flush the surface of the second flow guide.

3. The exhaust duct according to claim 2, characterized in that, The first guide has a first guide surface on the side facing the air inlet, the periphery of the first guide surface extends from the air inlet to the air outlet relative to the center of the first guide surface, and the periphery of the first guide surface is inclined towards the pipe wall relative to the center of the first guide surface; the first guide surface is configured to guide the alkaline gas to flow towards the pipe wall. And / or, the first guide vane has a second guide surface on the side opposite to the air inlet, the periphery of the second guide surface is connected to the periphery of the first guide surface, the center of the second guide surface extends relative to the periphery of the second guide surface in a direction from the air inlet to the air outlet, and the center of the second guide surface is inclined relative to the periphery of the second guide surface in a direction away from the pipe wall; the second guide surface is configured to guide the alkaline gas to flow from the periphery of the second guide surface to the center of the second guide surface for mixing; And / or, the second flow guide has a third flow guiding surface on the side facing the first flow guide, the periphery of the third flow guiding surface extending in the direction from the air inlet to the air outlet relative to the center of the third flow guiding surface, and the periphery of the third flow guiding surface inclined towards the pipe wall relative to the center of the third flow guiding surface; the third flow guiding surface is configured to guide the alkaline gas to flow towards the pipe wall; And / or, the second flow guide has a fourth flow guiding surface on the side opposite to the first flow guide, the periphery of the fourth flow guiding surface is connected to the periphery of the third flow guiding surface, the center of the fourth flow guiding surface extends relative to the periphery of the fourth flow guiding surface in the direction from the air inlet to the air outlet, and the center of the fourth flow guiding surface is inclined relative to the periphery of the fourth flow guiding surface in a direction away from the pipe wall; the fourth flow guiding surface is configured to guide the alkaline gas to flow from the periphery of the fourth flow guiding surface to the center of the fourth flow guiding surface for mixing.

4. The exhaust duct according to claim 2, characterized in that, The first flow guide is spindle-shaped, elliptical, or spherical; And / or, the second flow guide is spindle-shaped, elliptical, or spherical; And / or, the first flow guide is separated from the pipe wall on all four sides, and a first support member is connected between the first flow guide and the pipe wall; And / or, the second flow guide is separated from the pipe wall on all four sides, and a second support is connected between the second flow guide and the pipe wall.

5. The exhaust pipe according to any one of claims 2 to 4, characterized in that, The exhaust duct is arranged vertically, the flushing mechanism is located above the second guide, the second guide is located above the first guide, the flushing mechanism is configured to spray flushing liquid onto the surface of the second guide and the pipe wall above the second guide, and the second guide is also configured to guide the flushing liquid to flow toward the surface of the first guide.

6. The exhaust duct according to claim 5, characterized in that, The rinsing mechanism includes: A first spray structure is disposed corresponding to the pipe wall above the second guide vane, and the first spray structure is configured to spray the flushing liquid onto the pipe wall above the second guide vane; and A second spray structure is provided corresponding to the second guide tube, and the second spray structure is configured to spray the rinsing liquid onto the surface of the second guide tube.

7. The exhaust duct according to claim 6, characterized in that, The first spray structure includes an annular water pipe, which is arranged around the inner side of the pipe wall. The annular water pipe is provided with a plurality of first spray holes, which are configured to spray the rinsing liquid onto the pipe wall. The second spray structure includes a vertical water pipe, the vertical water pipe, the second guide and the first guide are arranged from top to bottom, the vertical water pipe extends in a direction close to the second guide, and the vertical water pipe is provided with a second spray hole, the second spray hole is configured to spray the rinsing liquid onto the middle part of the side surface of the second guide away from the first guide.

8. The exhaust duct according to claim 7, characterized in that, The rinsing mechanism also includes a water inlet manifold, which is equipped with a solenoid valve. The annular water pipe and the vertical water pipe are both connected to the water inlet manifold. The water inlet manifold is configured to be connected to a waste acid source so that the waste acid in the waste acid source is used as the rinsing liquid.

9. The exhaust duct according to claim 7, characterized in that, The upper end of the vertical water pipe is located between the inner circumference of the annular water pipe, and the upper end of the vertical water pipe is also provided with a third spray hole, which is configured to spray the rinsing liquid onto the annular water pipe and the vertical water pipe.

10. The exhaust duct according to claim 5, characterized in that, A first liquid guiding connector is connected between the first flow guide and the second flow guide. The upper end of the first liquid guiding connector is connected to the middle of the side surface of the second flow guide facing the first flow guide, and the lower end of the first liquid guiding connector is connected to the middle of the side surface of the first flow guide away from the air inlet. The first liquid guiding connector is configured to guide the flushing liquid on the surface of the second flow guide to flow to the surface of the first flow guide. The bottom end of the first flow guide is provided with a second liquid guiding connector, and a collection groove is provided on the pipe wall. In the vertical direction, the collection groove is located between the first flow guide and the air inlet. In the horizontal direction, the collection groove is located on the periphery of the air inlet. The bottom end of the second liquid guiding connector is connected to the collection groove, and the collection groove is provided with a drain section.

11. The exhaust duct according to any one of claims 1 to 4, characterized in that, The tube is cylindrical, with a length of L and a diameter of D; wherein 3 ≤ L / D ≤ ​​6; And / or, the material of the pipe body is any one of PFA, PP, PPH or PVC; And / or, the two ends of the pipe body are respectively provided with a first connecting flange and a second connecting flange, and the air inlet and air outlet are respectively located at the two ends of the pipe body.

12. A solar cell production system, characterized in that, include: A wet process equipment, the wet process equipment being configured to process solar cells using an alkaline solution, the wet process equipment having an exhaust port configured to discharge the alkaline gas; The exhaust duct as described in any one of claims 1 to 11, wherein the air inlet is connected to the exhaust port; and A waste acid source is provided, and the rinsing mechanism is connected to the waste acid source, which is configured to provide waste acid to the rinsing mechanism.

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