Tail gas treatment device and solar cell production system

Abstract

This utility model discloses a tail gas discharge device and a solar cell production system. The tail gas discharge device includes a first liquid storage tank and a second liquid storage tank. The first liquid storage tank is used to hold a reaction liquid and is equipped with a first inlet pipe and a first outlet pipe. The first inlet pipe is used to introduce the tail gas generated by the solar cell production system, so that the chlorine in the tail gas reacts with the reaction liquid. The second liquid storage tank is used to hold a first liquid, which is a solvent for metaboric acid. The second liquid storage tank is equipped with a second inlet pipe and a second outlet pipe. The second inlet pipe is connected to the first outlet pipe and is used to introduce the tail gas discharged from the first outlet pipe, so that the metaboric acid in the tail gas dissolves in the first liquid. The temperature T1 of the reaction liquid is 20℃≤T1≤30℃, and the temperature T2 of the first liquid is 80℃≤T2≤100℃. Using the solution of this utility model, the metaboric acid in the tail gas can be treated, reducing the risk of tail gas discharge device blockage.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic technology, and in particular to a tailpipe device and a solar cell production system. Background Technology

[0002] Currently, the diffusion process of solar cells generates harmful exhaust gases such as chlorine. Therefore, exhaust gas treatment equipment is typically used to treat these gases. For example, exhaust gas equipment uses sodium chlorate to react with chlorine, thereby reducing chlorine emissions. Related technologies often employ a wet oxygen process in the diffusion process, which can effectively improve the performance and stability of solar cells. However, during production, existing exhaust gas equipment is prone to clogging by a white gel-like substance, causing it to malfunction. Utility Model Content

[0003] This utility model discloses a tail gas exhaust device and a solar cell production system, which can treat metaboric acid in the exhaust gas and reduce the risk of tail gas exhaust device blockage.

[0004] To achieve the above objectives, in a first aspect, this utility model discloses a tail discharge device, which is applied to a solar cell production system, and the tail discharge device includes:

[0005] A first storage tank is used to hold the reaction liquid. The first storage tank is equipped with a first inlet pipe and a first outlet pipe. The first inlet pipe is used to introduce the exhaust gas generated by the solar cell production system, so that the chlorine gas in the exhaust gas reacts with the reaction liquid.

[0006] The second liquid storage tank is used to hold the first liquid, which is a solvent for metaboric acid. The second liquid storage tank is provided with a second air inlet pipe and a second air outlet pipe. The second air inlet pipe is connected to the first air outlet pipe. The second air inlet pipe is used to introduce the exhaust gas discharged from the first air outlet pipe so that the metaboric acid in the exhaust gas dissolves in the first liquid. The second air outlet pipe is connected to the external environment.

[0007] Wherein, the temperature T1 of the reaction solution is 20℃≤T1≤30℃, and the temperature T2 of the first liquid is 80℃≤T2≤100℃.

[0008] As an optional implementation, the first liquid storage tank has a first preset liquid level, the opening of the first air inlet pipe in the first liquid storage tank is located below the first preset liquid level in a first direction, and the opening of the first air outlet pipe in the first liquid storage tank is located above the first preset liquid level in the first direction.

[0009] The second liquid storage tank has a second preset liquid level, the opening of the second air inlet pipe in the second liquid storage tank is located below the second preset liquid level in the first direction, and the opening of the second air outlet pipe in the second liquid storage tank is located above the second preset liquid level in the first direction.

[0010] The first direction is the height direction of the tail discharge device.

[0011] As an optional implementation, the distance between the plane where the first air inlet pipe is located in the first liquid storage tank and the first preset liquid level is D1, which satisfies: 60mm≤D1≤80mm;

[0012] The distance between the plane where the first vent pipe is located in the first liquid storage tank and the first preset liquid level is D2, which satisfies: 40mm≤D2≤60mm.

[0013] As an optional implementation, the distance between the plane where the second air inlet pipe is located in the second liquid storage tank and the second preset liquid level is D3, which satisfies: 60mm≤D3≤80mm;

[0014] The distance between the plane where the second vent pipe is located in the second liquid storage tank and the second preset liquid level is D4, which satisfies: 30mm≤D4≤50mm.

[0015] As an optional implementation, the first liquid storage tank is provided with a first liquid inlet and a first liquid outlet, the first liquid inlet being used to introduce the reaction liquid;

[0016] The second liquid storage tank is provided with a second liquid inlet and a second liquid outlet, and the second liquid inlet is used to introduce the first liquid.

[0017] As an optional implementation, the first liquid storage tank is provided with a first liquid level sensor, which is used to detect whether the liquid level of the reaction liquid in the first liquid storage tank is at the first preset liquid level.

[0018] The second liquid storage tank is equipped with a second liquid level sensor, which is used to detect whether the liquid level of the first liquid in the second liquid storage tank is at the second preset liquid level.

[0019] As an optional implementation, the temperature T2 of the first liquid is 90℃≤T2≤96℃; and / or,

[0020] The second liquid storage tank is equipped with a temperature sensor, which is used to detect the temperature of the first liquid.

[0021] As an optional implementation, the tailpipe device further includes a housing, in which the first liquid storage tank and the second liquid storage tank are disposed. The housing has a first side, and the port of the first air inlet pipe outside the first liquid storage tank and the port of the second air outlet pipe outside the second liquid storage tank are both located on the first side.

[0022] Secondly, this utility model also discloses a solar cell production system, including a diffusion furnace and a tail discharge device as described in the first aspect above, wherein the first air inlet pipe is connected to the diffusion furnace through a port outside the first liquid storage tank.

[0023] As an optional implementation, the diffusion furnace includes a furnace body and a furnace tube. The furnace body has a heating chamber for heating the furnace tube. The furnace tube passes through the heating chamber, and the first air inlet pipe is connected to the furnace tube at its port outside the first liquid storage tank.

[0024] The tailpipe device also includes a heat exchange tube, which is located on the portion of the furnace tube exposed outside the heating chamber. The heat exchange tube is used to introduce the first liquid so that the first liquid absorbs the heat from the furnace tube. The heat exchange tube is connected to the second liquid storage tank so that the heated first liquid is introduced into the second liquid storage tank.

[0025] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0026] The tail gas discharge equipment and solar cell production system provided in this embodiment of the invention, by setting up a first liquid storage tank and a second liquid storage tank, wherein the first liquid storage tank contains a reaction liquid, the chlorine gas in the tail gas passing through the first inlet pipe into the first liquid storage tank will react with the reaction liquid, thereby achieving the treatment of chlorine gas. At the same time, taking advantage of the characteristic that metaboric acid is soluble in high temperature water but insoluble in room temperature water, by making the temperature of the reaction liquid T1 20℃≤T1≤30℃ and the temperature of the first liquid T2 80℃≤T2≤100℃, the metaboric acid in the tail gas will not dissolve in the reaction liquid, and can enter the second liquid storage tank through the first outlet pipe and the second inlet pipe, where the metaboric acid will dissolve in the first liquid in the second liquid storage tank, thereby reducing the content of metaboric acid in the tail gas discharged from the second outlet pipe and reducing the risk of the second outlet pipe of the tail gas discharge equipment being blocked. In addition, the relatively low temperature of the reaction liquid can reduce the temperature of the exhaust gas entering the first storage tank from the first inlet pipe, so that the reaction liquid reacts more fully with the chlorine gas, which helps to reduce the chlorine content in the exhaust gas emitted from the second outlet pipe. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a simplified schematic diagram of the first structure of the tailpipe device disclosed in the first aspect of the embodiments of this application;

[0029] Figure 2 This is a simplified schematic diagram of the second structure of the tailpipe device disclosed in the first aspect of the embodiments of this application;

[0030] Figure 3 This is a simplified schematic diagram of the first structure of the solar cell production system disclosed in the second aspect of the embodiments of this application;

[0031] Figure 4 This is a simplified schematic diagram of a second structure of a solar cell production system disclosed in the second aspect of the embodiments of this application.

[0032] Icon: 1. Exhaust equipment;

[0033] 10. First liquid storage tank; 100. First air inlet pipe; 101. First air outlet pipe; 102. First liquid inlet pipe; 102a. First liquid inlet; 103. First liquid outlet pipe; 103a. First liquid outlet; 104. First liquid level sensor;

[0034] 11. Second liquid storage tank; 110. Second air inlet pipe; 111. Second air outlet pipe; 112. Second liquid inlet pipe; 112a. Second liquid inlet; 113. Second liquid outlet pipe; 113a. Second liquid outlet; 114. Second liquid level sensor; 115. Temperature sensor;

[0035] 12. Shell; 120. First side;

[0036] 13. Heat exchanger tubes;

[0037] 2. Solar cell production system;

[0038] 20. Diffusion furnace; 200. Furnace tube;

[0039] X, the first direction. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] Currently, the diffusion process of solar cells generates harmful exhaust gases such as chlorine. Therefore, exhaust gas treatment equipment is typically used to treat these gases. For example, exhaust gas equipment uses sodium chlorate to react with chlorine, thereby reducing chlorine emissions. Related technologies often employ a wet oxygen process in the diffusion process, which can effectively improve the performance and stability of solar cells. However, during production, existing exhaust gas equipment is prone to clogging by a white gel-like substance, causing it to malfunction.

[0042] The inventors discovered that during the boron diffusion process in solar cell production systems, the main chemical reaction is 2BCl3 = 2B + 3Cl2. The boron atoms produced act as diffused ions, while the generated Cl2 is a harmful and excess waste gas. Because the wet oxygen process in boron diffusion requires water, boron trichloride reacts with water to produce boric acid, the main chemical reaction being BCl3 + 3H2O = 2H3BO3 + 3HCl. Boric acid, under high-temperature conditions, generates metaboric acid, which is the main component of the white gel-like substance in the exhaust.

[0043] Therefore, it is urgent to treat metaboric acid to avoid clogging in the tailpipe equipment.

[0044] Based on this, the present invention discloses a tail gas discharge device and a solar cell production system. The tail gas discharge device is equipped with a first liquid storage tank and a second liquid storage tank. The first liquid storage tank contains a reaction liquid. Chlorine gas in the tail gas entering the first liquid storage tank through the first inlet pipe reacts with the reaction liquid, thereby treating the chlorine gas. At the same time, taking advantage of the characteristic that metaboric acid is soluble in high-temperature water (i.e., water with a temperature of approximately 80℃-100℃) but insoluble in room-temperature water (i.e., water with a temperature of approximately 20℃-30℃), by making the temperature T1 of the reaction liquid 20℃≤T1≤30℃ and the temperature T2 of the first liquid 80℃≤T2≤100℃, the metaboric acid in the tail gas will not dissolve in the reaction liquid. It can enter the second liquid storage tank through the first outlet pipe and the second inlet pipe, where the metaboric acid will dissolve in the first liquid in the second liquid storage tank. This reduces the content of metaboric acid in the tail gas discharged from the second outlet pipe and lowers the risk of the second outlet pipe of the tail gas discharge device being blocked. In addition, the relatively low temperature of the reaction liquid can reduce the temperature of the exhaust gas entering the first storage tank from the first inlet pipe, so that the reaction liquid reacts more fully with the chlorine gas, which helps to reduce the chlorine content in the exhaust gas emitted from the second outlet pipe.

[0045] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.

[0046] Please refer to the following: Figure 1 The first aspect of this utility model discloses a tail exhaust device 1, which is applied to a solar cell production system. The tail exhaust device 1 includes a first liquid storage tank 10 and a second liquid storage tank 11. The first liquid storage tank 10 is used to hold a reaction liquid. The first liquid storage tank 10 is provided with a first air inlet pipe 100 and a first air outlet pipe 101. The first air inlet pipe 100 is used to introduce the tail gas generated by the solar cell production system so that the chlorine in the tail gas reacts with the reaction liquid. The second liquid storage tank 11 is used to hold a first liquid, which is a solvent for metaboric acid. The second liquid storage tank 11 is provided with a second air inlet pipe 110 and a second air outlet pipe 111. The second air inlet pipe 110 is connected to the first air outlet pipe 101. The second air inlet pipe 110 is used to introduce the tail gas discharged from the first air outlet pipe 101 so that the metaboric acid in the tail gas dissolves in the first liquid. The second air outlet pipe 111 is connected to the external environment. The temperature of the first liquid is higher than the temperature of the reaction liquid.

[0047] The tail gas exhaust device 1 provided in the first aspect of this utility model, by setting up a first liquid storage tank 10 and a second liquid storage tank 11, wherein the first liquid storage tank 10 contains a reaction liquid, and the chlorine gas in the tail gas introduced into the first liquid storage tank 10 through the first air inlet pipe 100 reacts with the reaction liquid, thereby achieving the treatment of chlorine gas. At the same time, it utilizes the characteristic that metaboric acid is soluble in high-temperature water (i.e., water with a temperature of approximately 80℃-100℃) but insoluble in room-temperature water (i.e., water with a temperature of approximately 20℃-30℃). By ensuring that the temperature of the reaction liquid T1 is 20℃≤T1≤30℃ and the temperature of the first liquid T2 is 80℃≤T2≤100℃, the metaboric acid in the exhaust gas will not dissolve in the reaction liquid and can enter the second storage tank 11 through the first outlet pipe 101 and the second inlet pipe 110. The metaboric acid will dissolve in the first liquid in the second storage tank 11, thereby reducing the content of metaboric acid in the exhaust gas emitted from the second outlet pipe 111 and reducing the risk of blockage of the second outlet pipe 111 of the exhaust device 1. In addition, the relatively low temperature of the reaction liquid can lower the temperature of the exhaust gas entering the first storage tank 10 from the first inlet pipe 100, allowing the reaction liquid and chlorine to react more fully, which is beneficial to reducing the chlorine content in the exhaust gas emitted from the second outlet pipe 111.

[0048] Optionally, the solar cell can be a TOPCon cell (Tunnel Oxide Passivated Contact solar cell), a PERC cell (Passivated Emitter and Rear Cell), or an HJT cell (Heterojunction Technology, crystalline silicon heterojunction cell), etc. The specific choice can be made according to the actual situation, and no specific limitation is made in this embodiment.

[0049] Optionally, such as Figure 1 As shown, the first air outlet pipe 101 and the second air inlet pipe 110 can be integrally formed, that is, the first air outlet pipe 101 and the second air inlet pipe 110 can be the same air pipe, or, as... Figure 2 As shown, the first air outlet pipe 101 and the second air inlet pipe 110 can be set separately, that is, the first air outlet pipe 101 and the second air inlet pipe 110 can be two air pipes. The specific choice can be made according to the actual situation, and no specific limitation is made in this embodiment.

[0050] Optionally, the reaction solution can be a sodium chlorate solution or a potassium chlorate solution, etc., and the specific choice can be made according to the actual situation. In this embodiment, no specific limitation is made.

[0051] For example, the temperature T1 of the reaction solution can be 20°C, 22°C, 24°C, 26°C, 28°C or 30°C, etc., and can be selected according to the actual situation. In this embodiment, no specific limitation is made.

[0052] Optionally, the first liquid may be water or a liquid containing water (such as an ethanol solution or an ether solution), etc. The specific choice can be made according to the actual situation, and no specific limitation is made in this embodiment.

[0053] For example, the temperature T2 of the first liquid can be 80°C, 90°C or 100°C, etc., and can be selected according to the actual situation. In this embodiment, no specific limitation is made.

[0054] In some embodiments, the temperature T2 of the first liquid is 90℃≤T≤96℃. Exemplarily, the temperature T2 of the first liquid can be 90℃, 93℃, or 96℃, etc., and can be selected according to the actual situation. In this embodiment, no specific limitation is made.

[0055] By ensuring that the temperature T2 of the first liquid is 90℃≤T2≤96℃, it is beneficial for the metaboric acid in the exhaust gas entering from the second intake pipe 110 to dissolve better in the first liquid, thereby reducing the content of metaboric acid in the exhaust gas emitted from the second exhaust pipe 111 and reducing the risk of blockage of the second exhaust pipe 111 of the exhaust device 1.

[0056] In some embodiments, a temperature sensor 115 is provided in the second liquid storage tank 11, which is used to detect the temperature of the first liquid.

[0057] By installing a temperature sensor 115 in the second liquid storage tank 11, the temperature sensor 115 can detect the temperature of the first liquid in real time, which makes it easier for the producer to monitor the temperature of the first liquid. This helps ensure that the temperature T of the first liquid meets 90℃≤T≤96℃, which in turn helps to make the metaboric acid in the exhaust gas entering from the second air inlet pipe 110 dissolve better in the first liquid.

[0058] Optionally, the temperature sensor 115 may be a thermocouple sensor, a thermistor sensor, or an infrared temperature sensor 115, etc. The specific choice can be made according to the actual situation, and no specific limitation is made in this embodiment.

[0059] In some embodiments, the first storage tank 10 has a first preset liquid level, the opening of the first air inlet pipe 100 in the first storage tank 10 is located below the first preset liquid level in a first direction, and the opening of the first air outlet pipe 101 in the first storage tank 10 is located above the first preset liquid level in a first direction. It is understood that the first preset liquid level refers to the ideal liquid level of the reaction liquid in the first storage tank 10 preset by the producer. For example, the first preset liquid level can be the liquid level at 1 / 2 or 2 / 3 of the total volume of the first storage tank 10. The first direction is the height direction of the tail discharge device 1. Since the tail discharge device 1 is usually placed on the ground, the first direction is also the direction perpendicular to the horizontal plane.

[0060] In this way, the exhaust gas introduced from the first inlet pipe 100 will enter the reaction liquid, which is conducive to the chlorine in the exhaust gas reacting more fully with the reaction liquid, which is conducive to reducing the chlorine content in the exhaust gas. Furthermore, the remaining exhaust gas will be discharged from the first outlet pipe 101 located above the first preset liquid surface, which is conducive to the exhaust gas flowing in a preset direction (i.e., entering from the first inlet pipe 100 and exiting from the first outlet pipe 101).

[0061] In some embodiments, the second liquid storage tank 11 has a second preset liquid level, the opening of the second air inlet pipe 110 in the second liquid storage tank 11 is located below the second preset liquid level in a first direction, and the opening of the second air outlet pipe 111 in the second liquid storage tank 11 is located above the second preset liquid level in a first direction. It is understood that the second preset liquid level refers to the ideal liquid level of the first liquid in the second liquid storage tank 11 preset by the manufacturer. For example, the second preset liquid level may be the liquid level at 1 / 2 of the total volume or at 2 / 3 of the total volume of the second liquid storage tank 11.

[0062] In this way, the exhaust gas introduced from the second intake pipe 110 will enter the first liquid, which is beneficial for the metaboric acid in the exhaust gas to dissolve better in the first liquid, which is beneficial for reducing the metaboric acid content in the exhaust gas. Furthermore, the remaining exhaust gas will be discharged from the second exhaust pipe 111 located above the second preset liquid surface, which is beneficial for the exhaust gas to flow in a preset direction (i.e., entering from the second intake pipe 110 and then exiting from the second exhaust pipe 111).

[0063] Please see Figure 1 , Figure 1 The dashed lines are used to indicate the first preset liquid level of the reaction liquid in the first storage tank 10 and the second preset liquid level of the first liquid in the second storage tank 11. In some embodiments, the distance between the plane where the first air inlet pipe 100 is located in the first storage tank 10 and the first preset liquid level is D1, satisfying: 60mm≤D1≤80mm; the distance between the plane where the first air outlet pipe 101 is located in the first storage tank 10 and the first preset liquid level is D2, satisfying: 40mm≤D2≤60mm.

[0064] For example, D1 can be 60mm, 65mm, 70mm, 75mm or 80mm, etc., and D2 can be 40mm, 45mm, 50mm, 55mm or 60mm, etc. The specific selection can be made according to the actual situation, and no specific limitation is made in this embodiment.

[0065] By ensuring that D1 satisfies 60mm≤D1≤80mm and D2 satisfies 40mm≤D2≤60mm, it is beneficial to allow the chlorine in the exhaust gas to react more fully with the reaction liquid, which is beneficial to further reduce the chlorine content in the exhaust gas.

[0066] In some embodiments, the distance between the plane where the second air inlet pipe 110 is located in the second liquid storage tank 11 and the second preset liquid level is D3, satisfying: 60mm≤D3≤80mm; the distance between the plane where the second air outlet pipe 111 is located in the second liquid storage tank 11 and the second preset liquid level is D4, satisfying: 30mm≤D4≤50mm.

[0067] For example, D3 can be 60mm, 65mm, 70mm, 75mm or 80mm, etc., and D4 can be 30mm, 35mm, 40mm, 45mm or 50mm, etc. The specific selection can be made according to the actual situation, and no specific limitation is made in this embodiment.

[0068] By ensuring that D3 satisfies 60mm≤D3≤80mm and D4 satisfies 30mm≤D4≤50mm, it is beneficial to make the metaboric acid in the exhaust gas more soluble in the first liquid, which is beneficial to further reduce the content of metaboric acid in the exhaust gas.

[0069] In some embodiments, the first liquid storage tank 10 is provided with a first liquid inlet 102a and a first liquid outlet 103a, and the first liquid inlet 102a is used to introduce the reaction liquid.

[0070] By setting a first inlet 102a and a first outlet 103a, the reaction liquid can be introduced into the first storage tank 10 through the first inlet 102a and discharged through the first outlet 103a, thereby replacing the reaction liquid in the first storage tank 10. This helps maintain the concentration of substances that react with chlorine gas (such as sodium chlorate or potassium chlorate) in the reaction liquid in the first storage tank 10, thus ensuring that the chlorine gas in the exhaust gas reacts fully with the reaction liquid in the first storage tank 10. Furthermore, by controlling the flow rate of the reaction liquid introduced through the first inlet 102a and the flow rate of the reaction liquid discharged through the first outlet 103a, it is beneficial to maintain the liquid level of the reaction liquid in the first storage tank 10 at a first preset liquid level.

[0071] In some embodiments, the first liquid storage tank 10 is provided with a first liquid inlet pipe 102 and a first liquid outlet pipe 103. One end of the first liquid inlet pipe 102 is connected to the first liquid inlet 102a, and the other end of the first liquid inlet pipe 102 is connected to the external environment and used to introduce the reaction liquid. One end of the first liquid outlet pipe 103 is connected to the first liquid outlet 103a, and the other end of the first liquid outlet pipe 103 is connected to the external environment.

[0072] In some embodiments, the second liquid storage tank 11 is provided with a second liquid inlet 112a and a second liquid outlet 113a, and the second liquid inlet 112a is used to introduce the first liquid.

[0073] By providing a second inlet 112a and a second outlet 113a, the first liquid can be introduced into the second storage tank 11 through the second inlet 112a and discharged through the second outlet 113a, thereby replacing the first liquid in the second storage tank 11 and reducing the concentration of metaboric acid dissolved in the first liquid in the second storage tank 11. This facilitates better dissolution of metaboric acid in the exhaust gas by the first liquid in the second storage tank 11. Furthermore, by controlling the flow rate of the first liquid introduced through the second inlet 112a and the flow rate of the first liquid discharged through the second outlet 113a, it is beneficial to maintain the liquid level of the first liquid in the second storage tank 11 at a second preset liquid level.

[0074] In some embodiments, the second liquid storage tank 11 is provided with a second liquid inlet pipe 112 and a second liquid outlet pipe 113. One end of the second liquid inlet pipe 112 is connected to the second liquid inlet port 112a, and the other end of the second liquid inlet pipe 112 is connected to the external environment and used to introduce the first liquid. One end of the second liquid outlet pipe 113 is connected to the second liquid outlet port 113a, and the other end of the second liquid outlet pipe 113 is connected to the external environment.

[0075] In some embodiments, a first liquid level sensor 104 is provided in the first liquid storage tank 10, which is used to detect whether the liquid level of the reaction liquid in the first liquid storage tank 10 is at a first preset liquid level. A second liquid level sensor 114 is provided in the second liquid storage tank 11, which is used to detect whether the liquid level of the first liquid in the second liquid storage tank 11 is at a second preset liquid level.

[0076] By installing a first liquid level sensor 104 in the first liquid storage tank 10, the first liquid level sensor 104 can detect the liquid level height of the reaction liquid in the first liquid storage tank 10 in real time. This is beneficial for producers to compare whether the current liquid level height of the reaction liquid in the first liquid storage tank 10 is at the first preset liquid level, thereby helping to keep the liquid level of the reaction liquid in the first liquid storage tank 10 at the first preset liquid level.

[0077] By installing a second liquid level sensor 114 in the second liquid storage tank 11, the second liquid level sensor 114 can detect the liquid level height of the first liquid in the second liquid storage tank 11 in real time. This is beneficial for producers to compare whether the current liquid level height of the first liquid in the second liquid storage tank 11 is at the second preset liquid level, thereby helping to keep the liquid level of the first liquid in the second liquid storage tank 11 at the second preset liquid level.

[0078] Optionally, the first liquid level sensor 104 and the second liquid level sensor 114 may be optical liquid level sensors, capacitive liquid level sensors or hydrostatic liquid level sensors, etc. The specific selection can be made according to the actual situation, and no specific limitation is made in this embodiment.

[0079] In some embodiments, the tail discharge device 1 further includes a housing 12, within which the first liquid storage tank 10 and the second liquid storage tank 11 are disposed. The housing 12 can accommodate and protect the first liquid storage tank 10 and the second liquid storage tank 11, and facilitates the overall transportation and installation of the tail discharge device 1.

[0080] Optionally, the shell 12 can be a box structure or a tank structure, etc., and the specific choice can be made according to the actual situation. In this embodiment, no specific limitation is made.

[0081] In some embodiments, the housing 12 has a first side 120, where the opening of the first air inlet pipe 100 outside the first liquid storage tank 10 and the opening of the second air outlet pipe 111 outside the second liquid storage tank 11 are both located on the first side 120. It is understood that the first side 120 of the housing 12 can be any side of the housing 12. For example, when the housing 12 is a square box structure, the first side 120 can be any side of the left, right, front, rear, or top.

[0082] By placing the port of the first air inlet pipe 100 outside the first liquid storage tank 10 and the port of the second air outlet pipe 111 outside the second liquid storage tank 11 on the same side of the shell 12, it is convenient for construction personnel to connect the pipeline of the tail exhaust equipment 1 to other equipment (such as diffusion furnaces), thereby improving the installation efficiency of the tail exhaust equipment 1.

[0083] In this embodiment, the ports of the first inlet pipe 102 and the first outlet pipe 103 outside the first liquid storage tank 10, and the ports of the second inlet pipe 112 and the second outlet pipe 113 outside the second liquid storage tank 11, are also located on the first side 120.

[0084] Please see Figure 3 The second aspect of this utility model discloses a solar cell production system 2, including a diffusion furnace 20 and a tail discharge device 1 as described in the first aspect of the above embodiments. A first air inlet pipe 100 is connected to the diffusion furnace 20 through a pipe opening outside a first liquid storage tank 10.

[0085] The solar cell production system 2 provided in the second aspect of this utility model includes a diffusion furnace 20 for performing a diffusion process. Since this solar cell production system 2 employs the tail gas discharge device 1 provided in the first aspect of this utility model, the tail gas discharge device 1, by setting up a first liquid storage tank 10 and a second liquid storage tank 11, allows the exhaust gas emitted from the diffusion furnace 20 to enter the first liquid storage tank 10 through a first inlet pipe 100. The first liquid storage tank 10 contains a reaction liquid. The chlorine gas in the exhaust gas entering the first liquid storage tank 10 through the first inlet pipe 100 reacts with the reaction liquid. The reaction process treats chlorine gas. Simultaneously, utilizing the characteristic that metaboric acid dissolves in high-temperature water but not in room-temperature water, by ensuring the temperature of the first liquid is higher than that of the reaction liquid, the metaboric acid in the exhaust gas will not dissolve in the reaction liquid. It can then enter the second storage tank 11 through the first outlet pipe 101 and the second inlet pipe 110, where it will dissolve in the first liquid. This reduces the metaboric acid content in the exhaust gas emitted from the second outlet pipe 111, lowering the risk of blockage in the second outlet pipe 111. Furthermore, the relatively lower temperature of the reaction liquid lowers the temperature of the exhaust gas entering the first storage tank 10 from the first inlet pipe 100, allowing for a more complete reaction between the reaction liquid and chlorine gas, further reducing the chlorine content in the exhaust gas emitted from the second outlet pipe 111.

[0086] In some embodiments, the diffusion furnace 20 includes a furnace body (not shown) and a furnace tube 200. The furnace body has a heating chamber for heating the furnace tube 200, which passes through the heating chamber. A first inlet pipe 100 is connected to the furnace tube 200 through an opening outside the first liquid storage tank 10. The heating chamber is capable of heating the furnace tube 200, providing the required temperature for the diffusion process within the furnace tube 200.

[0087] In some embodiments, the tail exhaust device 1 further includes a heat exchange tube 13, which is disposed on the portion of the furnace tube 200 exposed in the heating chamber. The heat exchange tube 13 is used to introduce a first liquid so that the first liquid absorbs the heat from the furnace tube 200. The heat exchange tube 13 is connected to a second liquid storage tank 11 so that the heated first liquid is introduced into the second liquid storage tank 11.

[0088] Since the first liquid entering the second storage tank 11 needs to be heated to a temperature T (e.g., 90°C, 93°C, or 96°C), a heat exchange tube 13 is provided on the part of the furnace tube 200 exposed in the heating chamber. When the first liquid flows through the heat exchange tube 13, it can absorb the heat of the furnace tube 200, effectively utilizing the heat emitted by the furnace tube 200 to heat the first liquid. This reduces the energy required to heat the first liquid to a temperature T, which helps to reduce the overall energy consumption of the solar cell production system 2.

[0089] In this embodiment, the heat exchange tube 13 is connected to the second inlet pipe 112 of the second liquid storage tank 11.

[0090] Optionally, the heat exchange tube 13 is located on the portion of the furnace tube 200 exposed outside the heating chamber, such as... Figure 3 As shown, the heat exchange tube 13 can be wound around the furnace tube 200, such as... Figure 4 As shown, the heat exchange tube 13 can also be installed on the furnace tube 200, etc. The specific choice can be made according to the actual situation, and no specific limitation is made in this embodiment.

[0091] The exhaust gas device and solar cell production system disclosed in the embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the exhaust gas device and solar cell production system of this utility model and its core ideas. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A tailpipe device, characterized in that, The tail discharge equipment is used in a solar cell production system, and the tail discharge equipment includes: A first storage tank is used to hold the reaction liquid. The first storage tank is equipped with a first inlet pipe and a first outlet pipe. The first inlet pipe is used to introduce the exhaust gas generated by the solar cell production system, so that the chlorine gas in the exhaust gas reacts with the reaction liquid. The second liquid storage tank is used to hold the first liquid, which is a solvent for metaboric acid. The second liquid storage tank is provided with a second air inlet pipe and a second air outlet pipe. The second air inlet pipe is connected to the first air outlet pipe. The second air inlet pipe is used to introduce the exhaust gas discharged from the first air outlet pipe so that the metaboric acid in the exhaust gas dissolves in the first liquid. The second air outlet pipe is connected to the external environment. Wherein, the temperature T1 of the reaction solution is 20℃≤T1≤30℃, and the temperature T2 of the first liquid is 80℃≤T2≤100℃.

2. The tail discharge device according to claim 1, characterized in that, The first liquid storage tank has a first preset liquid level, the opening of the first air inlet pipe in the first liquid storage tank is located below the first preset liquid level in a first direction, and the opening of the first air outlet pipe in the first liquid storage tank is located above the first preset liquid level in the first direction. The second liquid storage tank has a second preset liquid level, the opening of the second air inlet pipe in the second liquid storage tank is located below the second preset liquid level in the first direction, and the opening of the second air outlet pipe in the second liquid storage tank is located above the second preset liquid level in the first direction. The first direction is the height direction of the tail discharge device.

3. The tail discharge device according to claim 2, characterized in that, The distance between the plane where the first air inlet pipe is located in the first liquid storage tank and the first preset liquid level is D1, which satisfies: 60mm≤D1≤80mm; The distance between the plane where the first vent pipe is located in the first liquid storage tank and the first preset liquid level is D2, which satisfies: 40mm≤D2≤60mm.

4. The tail discharge device according to claim 2, characterized in that, The distance between the plane where the second air inlet pipe is located in the second liquid storage tank and the second preset liquid level is D3, which satisfies: 60mm≤D3≤80mm; The distance between the plane where the second vent pipe is located in the second liquid storage tank and the second preset liquid level is D4, which satisfies: 30mm≤D4≤50mm.

5. The tail discharge device according to claim 2, characterized in that, The first liquid storage tank is provided with a first liquid inlet and a first liquid outlet, and the first liquid inlet is used to introduce the reaction liquid; The second liquid storage tank is provided with a second liquid inlet and a second liquid outlet, and the second liquid inlet is used to introduce the first liquid.

6. The tail discharge device according to any one of claims 2-5, characterized in that, The first liquid storage tank is equipped with a first liquid level sensor, which is used to detect whether the liquid level of the reaction liquid in the first liquid storage tank is at the first preset liquid level. The second liquid storage tank is equipped with a second liquid level sensor, which is used to detect whether the liquid level of the first liquid in the second liquid storage tank is at the second preset liquid level.

7. The tail discharge device according to any one of claims 1-5, characterized in that, The temperature T2 of the first liquid is 90℃≤T2≤96℃; and / or, The second liquid storage tank is equipped with a temperature sensor, which is used to detect the temperature of the first liquid.

8. The tail discharge device according to any one of claims 1-5, characterized in that, The tailpipe device also includes a housing, in which the first liquid storage tank and the second liquid storage tank are disposed. The housing has a first side, and the port of the first air inlet pipe outside the first liquid storage tank and the port of the second air outlet pipe outside the second liquid storage tank are both located on the first side.

9. A solar cell production system, characterized in that, It includes a diffusion furnace and a tailpipe device as described in any one of claims 1-8, wherein the first inlet pipe is connected to the diffusion furnace at a port outside the first liquid storage tank.

10. The solar cell production system according to claim 9, characterized in that, The diffusion furnace includes a furnace body and a furnace tube. The furnace body has a heating chamber for heating the furnace tube. The furnace tube passes through the heating chamber. The first air inlet pipe is connected to the furnace tube at its port outside the first liquid storage tank. The tailpipe device also includes a heat exchange tube, which is located on the portion of the furnace tube exposed outside the heating chamber. The heat exchange tube is used to introduce the first liquid so that the first liquid absorbs the heat from the furnace tube. The heat exchange tube is connected to the second liquid storage tank so that the heated first liquid is introduced into the second liquid storage tank.

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