Tail gas emission filtering system and boron diffusion system

Abstract

The utility model provides a tail gas discharging and filtering system and a boron diffusion system, the system comprises a furnace body, a bottle body and a filtrate source, the bottle body is used for containing filtering liquid and is communicated with the furnace body, the filtering liquid is used for filtering tail gas discharged by the furnace body, and the filtrate source is communicated with the bottle body through a filtrate pipeline so as to input the filtering liquid into the bottle body. The filtrate pipeline comprises a heating section and a conveying section, the heating section is at least partially close to the furnace body, and two ends of the conveying section are respectively communicated with the heating section and the bottle body. According to the technical scheme, filtered liquid can be heated through heat radiation of the furnace body, and the temperature of the filtered liquid entering the bottle body through the conveying section is within the preset temperature range. The heating section is heated by utilizing overflow heat of the furnace body, and a heat source does not need to be additionally arranged to heat the filtering liquid, so that the filtering efficiency and the filtering effect on the tail gas can be improved under the condition that the cost is not additionally increased; the problem of limited tail gas treatment effect or excessive energy consumption is relieved.

Description

Technical Field

[0001] The present application belongs to the field of photovoltaic cell technology, and in particular relates to an exhaust emission filtration system and a boron diffusion system. Background Art

[0002] In the production of photovoltaic cells, the boron diffusion process is involved, which produces tail gas, so the tail gas needs to be treated to meet the safety emission standards. However, the existing tail gas treatment methods have limited treatment effects or consume too much energy. Utility Model Content

[0003] The embodiments of the present application provide an exhaust emission filtration system and a boron diffusion system to solve or alleviate one or more technical problems in the prior art.

[0004] As one aspect of an embodiment of the present application, an embodiment of the present application provides an exhaust emission filtering system, comprising:

[0005] Furnace body;

[0006] A bottle body, connected to the furnace body, the bottle body is used to contain a filtering liquid, and the filtering liquid is used to filter the tail gas discharged from the furnace body;

[0007] A filtrate source, connected to the bottle body through a filtrate pipeline, and used for inputting filtrate liquid into the bottle body;

[0008] The filtrate pipeline includes a heating section and a conveying section, wherein the heating section is connected to the filtrate source and is at least partially disposed close to the furnace body; one end of the conveying section is connected to the heating section, and the other end is connected to the bottle body;

[0009] The filtered liquid in the heating section is heated by the heat radiation of the furnace body; the heated filtered liquid flows from the heating section into the conveying section, and enters the bottle body after the conveying section is cooled to a preset temperature range.

[0010] Optionally, the heating section surrounds the furnace body.

[0011] Optionally, the length of the heating section is 4.5m to 6.5m.

[0012] Optionally, the heating section is spaced apart from the outer wall of the furnace body by 5 cm to 10 cm.

[0013] Optionally, the preset temperature range is 40°C to 50°C.

[0014] Optionally, the cross-section of the heating section is elliptical, and the wide side of the heating section is arranged close to the furnace body.

[0015] Optionally, the exhaust gas emission filtration system further includes a condensation component, which is connected between the furnace body and the bottle body and is used to cool the exhaust gas discharged from the furnace body.

[0016] Optionally, there are multiple bottle bodies, and the multiple bottle bodies are connected in series in sequence.

[0017] Optionally, the top of the condensation assembly is communicated with the furnace body, the lower end of the condensation assembly is communicated with the multiple bottle bodies, and the volume of the condensation assembly is greater than the total volume of the multiple bottle bodies.

[0018] Optionally, the exhaust emission filtering system further comprises:

[0019] A heat exchange component, connected to the bottle body, for receiving the tail gas filtered by the filter liquid;

[0020] A cold source is connected to the heat exchange component and is used to provide a condensing medium to the heat exchange component to reduce the water vapor content of the exhaust gas in the heat exchange component.

[0021] Optionally, the temperature of the condensing medium is 15° C. to 20° C. lower than the temperature of the exhaust gas discharged through the bottle body.

[0022] Optionally, the exhaust gas emission filtering system further comprises a temperature control valve, which is connected between the conveying section and the bottle body and is used to detect the temperature of the filtered liquid at one end of the conveying section close to the bottle body;

[0023] Wherein, when the temperature of the filtered liquid at one end of the conveying section close to the bottle body is within a preset temperature range, the temperature control valve opens to allow the filtered liquid within the preset temperature range to be input into the bottle body.

[0024] As another aspect of the embodiments of the present application, the embodiments of the present application also provide a boron diffusion system, comprising any of the exhaust emission filtration systems described above.

[0025] The embodiment of the present application adopts the above technical solution to heat the filtered liquid in the heating section through the heat radiation of the furnace body, so that the temperature of the filtered liquid entering the bottle body through the conveying section is within the preset temperature range. The filtered liquid heated to the preset temperature range can increase the solubility of the exhaust gas therein, and the present application generates heat when the furnace body is working, and the furnace body heats the heating section by heat radiation, that is, the overflow heat of the furnace body is used to heat the heating section, and there is no need to add an additional heat source to heat the filtered liquid. Therefore, the filtration efficiency and filtration effect of the exhaust gas can be improved without additional cost, alleviating the problem of limited exhaust gas treatment effect or excessive energy consumption.

[0026] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present application will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0028] Figure 1 A schematic diagram of an exhaust emission filtration system according to an embodiment of the present application;

[0029] Figure 2 is the solubility change curve of boric acid in water;

[0030] Figure 3 Another schematic diagram of the exhaust emission filtration system provided in an embodiment of the present application.

[0031] Description of reference numerals:

[0032] Furnace body 10; bottle body 20; filtrate source 30; heating section 301; conveying section 302; condensing component 40; heat exchange component 50; cold source 60; temperature control valve 70; control valve 80; vacuum pump 90; main discharge component 100. DETAILED DESCRIPTION

[0033] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings. In the accompanying drawings, for clarity, the sizes of layers, regions, elements and their relative sizes may be exaggerated. The same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0034] It should be understood that when an element or layer is referred to as "on ...", "adjacent to ...", "connected to" or "coupled to" other elements or layers, it can be directly on, adjacent to, connected to or coupled to other elements or layers, or there can be intervening elements or layers. On the contrary, when an element is referred to as "directly on ...", "directly adjacent to ...", "directly connected to" or "directly coupled to" other elements or layers, there is no intervening element or layer. It should be understood that although the terms first, second, third, etc. can be used to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Therefore, without departing from the teachings of the present disclosure, the first element, component, region, layer or part discussed below can be represented as the second element, component, region, layer or part. And when the second element, component, region, layer or part is discussed, it does not mean that the present disclosure necessarily has the first element, component, region, layer or part.

[0035] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0036] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0037] See also Figure 1 The embodiment of the present application provides an exhaust gas emission filtration system, which includes a furnace body 10, a bottle body 20 and a filtrate source 30. The following is a detailed description:

[0038] The furnace body 10 can be used to perform a boron diffusion process on solar cells, and this process will also generate tail gas.

[0039] The bottle body 20 is in communication with the furnace body 10, and the bottle body 20 is used to contain a filtering liquid, and the filtering liquid is used to filter the tail gas discharged from the furnace body 10. Specifically, the tail gas can be discharged into the filtering liquid through the exhaust pipe for filtering.

[0040] The filtrate source 30 is connected to the bottle 20 through a filtrate pipeline, and is used to input the filtrate liquid into the bottle 20. The exhaust gas is usually at a high temperature, and some of its components will be dissolved in the filtrate liquid during the exhaust process. After the filtrate source 30 adds the filtrate liquid to the bottle 20 for the first time, it can be replenished according to a predetermined rule (such as according to the height of the liquid level in the bottle).

[0041] The filtrate pipeline may include a heating section 301 and a conveying section 302 . The heating section 301 is connected to the filtrate source 30 and is at least partially disposed close to the furnace body 10 . One end of the conveying section 302 is connected to the heating section 301 , and the other end is connected to the bottle body 20 .

[0042] The filtered liquid in the heating section 301 is heated by the heat radiation of the furnace body 10 ; the heated filtered liquid flows from the heating section 301 into the conveying section 302 , and enters the bottle body 20 after being cooled to a preset temperature range in the conveying section 302 .

[0043] The embodiment of the present application heats the filtered liquid in the heating section 301 by heat radiation from the furnace body 10, so that the temperature of the filtered liquid entering the bottle body 20 through the conveying section 302 is within a preset temperature range. The filtered liquid heated to the preset temperature range can increase the solubility of the exhaust gas therein, and the present application generates heat when the furnace body 10 is working, and utilizes the overflow heat of the furnace body to heat the heating section 301 by heat radiation, without adding an additional heat source to heat the filtered liquid, so that the filtration efficiency and filtration effect of the exhaust gas can be improved without additional cost, alleviating the problem of limited exhaust gas treatment effect or excessive energy consumption.

[0044] In one embodiment, the heating section 301 may be arranged around the furnace body 10 so that the furnace body 10 heats the surrounding heating section 301. Preferably, the heating section 301 is arranged around three circles. The length of the heating section 301 arranged around the furnace body 10 may be 4.5m to 7m.

[0045] By way of example, the furnace body 10 has a circular cross section with a cross-sectional diameter of 520 mm. The heating section 301 is 10 cm apart from the furnace body 10 and is arranged around the furnace body 10 three times. According to the circumference formula, the length of the heating section 301 attached to the furnace body 10 is approximately 6.8 m.

[0046] In other embodiments, the heating section 301 may also be configured as other structures to be disposed close to the furnace body 10, such as arranging the heating section 301 in a Z-shape or arranging the heating section 301 in a spiral shape to ensure that the heating section 301 is heated evenly.

[0047] In one embodiment, the cross section of the heating section 301 is elliptical, and the wide side of the heating section 301 is arranged close to the furnace body 10. The wide side of the heating section 301 is arranged close to the furnace body 10, so that the heat of the furnace body 10 can be more evenly conducted to the heating section 301 by heat radiation, thereby improving the heating uniformity and heating efficiency of the heating section 301.

[0048] In one embodiment, the interval between the heating section 301 and the outer wall of the furnace body 10 can be 5 cm to 10 cm. Exemplarily, the temperature of the outer wall of the furnace body 10 can reach 850°C to 960°C when the furnace body 10 is working. By setting the interval between the heating section 301 and the outer wall of the furnace body 10 to 5 cm to 10 cm, the filtered liquid in the heating section 301 can be heated to a suitable temperature by the heat generated by the furnace body 10. Specifically, when the furnace body 10 is working, the filtered liquid in the heating section 301 can be heated to 70°C to 90°C. The filtered liquid at this temperature enters the bottle body 20 after the conveying section 302 is cooled to a preset temperature range.

[0049] In the preparation of photovoltaic cells, the tail gas generated by the boron diffusion process may include boron oxide (B2O3) or boron chloride (BCl3). Based on these tail gas components, in an optional embodiment, the filter liquid includes water (H2O).

[0050] Boron oxide and boron chloride in tail gas can react with water to dissolve harmful gases (boron oxide or boron chloride) in water, thereby making the tail gas harmless. The following is the corresponding reaction equation:

[0051] B2O3+3H2O=2H3BO3

[0052] BCl3+3H2O=H3BO3+3HCl

[0053] See also Figure 2 It can be seen that when the filtered liquid is water, the solubility of boric acid (H3BO3) in water increases with the increase of water temperature. In this embodiment, the preset temperature range is 40℃~50℃. In this temperature range, on the one hand, the solubility of boric acid in water can be improved, and the dissolution and filtering effect of water on exhaust gas can be improved to improve the solubility. On the other hand, it can avoid the problem that the water temperature is too high, causing a large amount of water to evaporate, and then causing the exhaust gas to have too much water vapor after passing through the filter bottle 20, causing the solid phase particles in the exhaust gas to cooperate with the water vapor and then adhere to the pipes or other components in the exhaust emission filtration system.

[0054] In some embodiments, the filtered liquid may also be an alkaline solution. When the boron oxide or boron chloride in the tail gas reacts with water to generate boric acid or hydrochloric acid, the alkaline solution may be subjected to a neutralization reaction with the boric acid or hydrochloric acid. For example, the alkaline liquid may include a NaOH solution or a Ca(OH)2 solution.

[0055] In one embodiment, the exhaust gas emission filtering system further includes a condensation assembly 40 , which is connected between the furnace body 10 and the bottle body 20 and is used to cool the exhaust gas discharged from the furnace body 10 .

[0056] During the process of cooling the exhaust gas, the condensation component 40 can perform primary filtration on some harmful substances (such as B2O3, BCl3) and condensable substances (such as water vapor) in the exhaust gas, and the temperature of the exhaust gas after cooling is relatively low, which can protect the subsequent processing equipment and prevent the high-temperature exhaust gas from damaging the subsequent equipment or reducing its working efficiency.

[0057] Furthermore, in this embodiment, there are multiple bottles 20, which are connected in series in sequence. The multiple bottles can perform multi-stage filtration on the exhaust gas to improve the overall filtration effect of the exhaust gas.

[0058] Specifically, the multiple bottles may include a first bottle, a second bottle, and a third bottle connected in parallel, and the filtrate source 30 may input filtered liquid to the first bottle, the second bottle, and the third bottle respectively to avoid interference caused by adding filtered liquid between different bottles.

[0059] In one embodiment, the filtrate source 30 can selectively input filtrate liquid into any one or more of the first bottle body, the second bottle body, and the third bottle body, so as to adjust the filtrate liquid capacity among the multiple bottles according to demand.

[0060] In other embodiments, the multiple bottles may be connected in parallel to filter the exhaust gas in multiple different bottles at the same time. The multiple bottles may also include other numbers of bottles, such as four, five, etc. The specific number of bottles, connection methods, etc. may be adjusted according to the filtering requirements of the exhaust gas.

[0061] In some unexpected situations, the filtered liquid in the bottle 20 may flow back along the pipeline. In order to prevent the filtered liquid from flowing back into the furnace 10 with a higher temperature, causing damage to the furnace 10 or affecting the process, in this embodiment, the top of the condensation assembly 40 is connected to the furnace 10, and the lower end of the condensation assembly 40 is connected to multiple bottles 20, and the volume of the condensation assembly 40 is greater than the total volume of the multiple bottles 20.

[0062] With such arrangement, when the filtered liquid in the bottle body 20 flows back, since the total volume of the multiple bottle bodies 20 is smaller than the volume of the condensation assembly 40, the condensation assembly 40 can accommodate all the filtered liquid in the multiple bottle bodies 20, and the top of the condensation assembly 40 is connected to the furnace body 10. When the condensation assembly 40 is not filled with the filtered liquid, the filtered liquid will not flow back into the furnace body 10 with a higher temperature.

[0063] When the exhaust gas passes through the bottle body 20, due to the influence of the temperature of the exhaust gas and the filtered liquid, the exhaust gas inevitably carries the moisture in the filtered liquid, resulting in a high water vapor content in the exhaust gas, making it easy for the solid particles in the exhaust gas to adhere to the components in the exhaust emission filtration system (such as the vacuum pump, etc.), reducing the system stability and component life.

[0064] Based on this, in one embodiment, the exhaust emission filtration system further includes a heat exchange component 50 and a cold source 60. The heat exchange component 50 is connected to the bottle body 20 and is used to receive the exhaust gas filtered by the filter liquid. The cold source 60 is connected to the heat exchange component 50 and is used to provide a condensing medium to the heat exchange component 50 to reduce the water vapor content of the exhaust gas in the heat exchange component 50.

[0065] The condensing medium can be one of water, saline solution, and alcohol solution. Salt is added to water to form a saline solution, and the freezing point of the saline solution is lower than that of ordinary water, so that the condensing medium can still remain liquid at a lower temperature, thereby improving the condensation efficiency. In other embodiments, the condensing medium can also be other materials, such as refrigerants (Freon, ammonia), etc.

[0066] Condensation fins may be provided in the heat exchange assembly 50 so that water vapor in the exhaust gas is condensed into condensed water after contacting the condensation fins in the heat exchange assembly 50, thereby reducing the water vapor content in the exhaust gas. The cold source 60 may provide a condensation medium for the heat exchange assembly 50 to continuously cool the condensation fins in the heat exchange assembly 50.

[0067] Specifically, after the exhaust gas passes through the heat exchange component 50, the water vapor content in the exhaust gas can be 0% to 10%, thereby reducing the water vapor content in the exhaust gas, reducing the solid particles in the exhaust gas adhering to the components in the exhaust emission filtration system (such as vacuum pumps, etc.), and improving the system stability and component life.

[0068] Furthermore, in this embodiment, the temperature of the condensing medium is 15° C. to 20° C. lower than the temperature of the exhaust gas discharged through the bottle body 20 .

[0069] The condensing fins in the heat exchange assembly 50 are cooled by the condensing medium, so that the temperature of the condensing medium and the exhaust gas is low, so as to facilitate the condensation of water vapor in the exhaust gas through the condensing fins. Preferably, when the temperature difference between the condensing medium and the exhaust gas is 15°C to 20°C, it can be ensured that the condensing fins can maintain a relatively low temperature while continuously contacting the exhaust gas, so as to ensure the condensation effect of the condensing fins. In other embodiments, the temperature difference between the condensing medium and the exhaust gas can also be in other ranges, which can be adjusted according to the flow rate and temperature of the exhaust gas.

[0070] In one embodiment, the exhaust gas emission filtration system further includes a temperature control valve 70, which is connected between the conveying section 302 and the bottle body 20 and is used to detect the temperature of the filtered liquid at one end of the conveying section 302 close to the bottle body 20. When the temperature of the filtered liquid at one end of the conveying section 302 close to the bottle body 20 is within a preset temperature range, the temperature control valve 70 is opened to allow the filtered liquid within the preset temperature range to be input into the bottle body 20.

[0071] Specifically, the temperature control valve 70 may include a fluid valve (not marked in the figure) and a temperature detection device (not marked in the figure). The temperature detection device is used to detect the temperature of the filtered liquid at one end of the conveying section 302 close to the bottle body 20. When the filtered liquid reaching there is within a preset temperature range, the fluid valve opens.

[0072] By controlling the temperature of the filtered liquid entering the bottle body 20 through the temperature control valve 70, it is possible to avoid the situation where the filtered liquid in the conveying section 302 is not within the preset temperature range before being input into the bottle body 20, resulting in poor exhaust gas filtering efficiency.

[0073] In other embodiments, a liquid level sensor (not shown) may be further provided on the bottle body 20 to detect the liquid level of the filtered liquid in the bottle body 20. When the temperature of the filtered liquid near one end of the bottle body 20 is within a preset temperature range and the liquid level of the filtered liquid in the bottle body 20 does not reach a preset height, the fluid valve will be opened, thereby avoiding the situation where too much filtered liquid is added to the bottle body 20.

[0074] In one embodiment, if Figure 3 As shown, the exhaust emission filtration system may include a furnace body 10, a bottle body 20, a filtrate source 30, a condensation assembly 40, a heat exchange assembly 50, a cold source 60, a temperature control valve 70, a control valve 80, a vacuum pump 90, and a main emission assembly 100. The furnace body 10, the condensation assembly 40, the bottle body 20, the heat exchange assembly 50, the control valve 80, the vacuum pump 90, and the main emission assembly 100 may be connected in series in this order, the filtrate source 30 is connected to the bottle body 20, the temperature control valve 70 is connected in series between the filtrate source 30 and the bottle body 20, and the cold source 60 is connected to the heat exchange assembly 50 to input the condensation medium to the heat exchange assembly 50.

[0075] The corresponding tail gas generated during the diffusion process of the battery cell is discharged to the condensation component 40 for cooling, and then the tail gas is input into the bottle body 20 for filtration. The bottle body 20 can contain a filtering liquid to filter the tail gas by liquid filtration. The heat exchange component 50 is used to condense the water vapor in the tail gas to reduce the water content in the tail gas, reduce the solid particles in the tail gas and the water vapor in the vacuum pump 90, and improve the service life of the vacuum pump 90. The control valve 80 can be opened or closed according to the process requirements to maintain the air pressure in the pipeline. The vacuum pump 90 can be vacuumed according to the process requirements, for example, the pressure in the pipeline is pumped from 100000Pa to 10000Pa. The vacuum pump 90 can also be used to guide the flow direction of the tail gas so that the tail gas is finally discharged through the main exhaust component 100. The main exhaust component 100 can be a plurality of large exhaust pipes so that the filtered tail gas is discharged to the outdoors or the exhaust system.

[0076] An embodiment of the present application also provides a boron diffusion system, comprising any of the exhaust emission filtration systems described above.

[0077] Specifically, the boron diffusion system may also include various devices or components for performing a boron diffusion process on the cell, such as:

[0078] The gas supply device is used to provide the furnace with boron source gas (BBr3, boron tribromide) and carrier gas (oxygen, nitrogen), and to control the flow rate and mixing ratio of the gas.

[0079] The boat is used to load the cells and place them in the furnace for processing. The boat can be made of quartz material to avoid reaction with the cells or the gas in the furnace.

[0080] The temperature control component is used to adjust the temperature in the furnace body according to the diffusion process requirements of the battery cell, for example, to control the temperature in the furnace body at 800°C to 1100°C.

[0081] In other embodiments, the boron diffusion system may be further equipped with other devices, components or systems as required.

[0082] It should be noted that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The orientation words "inside" and "outside" refer to the inside and outside relative to the outline of each component itself. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Therefore, the exemplary term "above..." can include both "above..." and "below..." orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here are interpreted accordingly.

[0083] It should also be noted that "one embodiment", "another embodiment", "embodiment", etc. mentioned in this application refer to the specific features, structures or characteristics described in conjunction with the embodiment included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of this application.

[0084] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0085] It should also be noted that the above are only preferred embodiments of the present application, and the patent protection scope of the present application is not limited thereto. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An exhaust emission filtration system, characterized in that: include: Furnace body; A bottle body, connected to the furnace body, the bottle body is used to contain a filtering liquid, and the filtering liquid is used to filter the tail gas discharged from the furnace body; A filtrate source, connected to the bottle body through a filtrate pipeline, and used for inputting filtrate liquid into the bottle body; The filtrate pipeline includes a heating section and a conveying section, wherein the heating section is connected to the filtrate source and is at least partially disposed close to the furnace body; one end of the conveying section is connected to the heating section, and the other end is connected to the bottle body; The filtered liquid in the heating section is heated by the heat radiation of the furnace body; the heated filtered liquid flows from the heating section into the conveying section, and enters the bottle body after the conveying section is cooled to a preset temperature range.

2. The exhaust emission filtration system according to claim 1, characterized in that: The heating section surrounds the furnace body.

3. The exhaust emission filtration system according to claim 1, characterized in that: The length of the heating section is 4.5m to 6.5m.

4. The exhaust gas filtration system according to claim 1, characterized in that: The spacing between the heating section and the outer wall of the furnace body is 5 cm to 10 cm.

5. The exhaust emission filtration system according to claim 1, characterized in that: The preset temperature range is 40°C to 50°C.

6. The exhaust emission filtration system according to claim 1, characterized in that: The cross section of the heating section is elliptical, and the wide side of the heating section is arranged close to the furnace body.

7. The exhaust gas filtration system according to any one of claims 1 to 6, characterized in that: The exhaust gas emission filtering system further comprises a condensation component, which is connected between the furnace body and the bottle body and is used for cooling the exhaust gas discharged from the furnace body.

8. The exhaust emission filtration system according to claim 7, characterized in that: There are multiple bottle bodies, and the multiple bottle bodies are connected in series in sequence.

9. The exhaust emission filtration system according to claim 8, characterized in that: The top of the condensation component is communicated with the furnace body, the lower end of the condensation component is communicated with the multiple bottle bodies, and the volume of the condensation component is greater than the total volume of the multiple bottle bodies.

10. The exhaust gas filtration system according to any one of claims 1 to 6, characterized in that: The exhaust gas filtration system further comprises: A heat exchange component, connected to the bottle body, for receiving the tail gas filtered by the filter liquid; A cold source is connected to the heat exchange component and is used to provide a condensing medium to the heat exchange component to reduce the water vapor content of the exhaust gas in the heat exchange component.

11. The exhaust emission filtering system according to claim 10, characterized in that: The temperature of the condensing medium is 15° C. to 20° C. lower than the temperature of the tail gas discharged through the bottle body.

12. The exhaust gas filtration system according to any one of claims 1 to 6, characterized in that: The exhaust gas emission filtering system further comprises a temperature control valve, which is connected between the conveying section and the bottle body and is used to detect the temperature of the filtered liquid at one end of the conveying section close to the bottle body; Wherein, when the temperature of the filtered liquid at one end of the conveying section close to the bottle body is within a preset temperature range, the temperature control valve opens to allow the filtered liquid within the preset temperature range to be input into the bottle body.

13. A boron diffusion system, characterized in that: It comprises the exhaust gas emission filtering system as claimed in any one of claims 1 to 12.

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