Energy-saving device suitable for large intermittent VOC gas incineration and treatment method
The segmented VOC gas incineration device solves the problem of treating intermittent, high-flow-rate waste gas, achieving efficient and energy-saving waste gas treatment, and reducing equipment redundancy and energy consumption.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- THE 711TH RES INST OF CHINA STATE SHIPBUILDING CORP
- Filing Date
- 2026-03-24
- Publication Date
- 2026-05-12
AI Technical Summary
Existing waste gas treatment devices are unable to effectively handle large-volume VOC emissions that occur intermittently, leading to environmental pollution. Furthermore, traditional designs result in equipment redundancy and energy waste.
The energy-saving device adopts a segmented structure, including a first shell and a second shell, which respectively handle small-flow and large-flow exhaust gases. Through different inlet and turbulence-inducing component designs, it achieves graded treatment and optimized combustion.
It achieves efficient combustion of small and large flow rates of VOC gases, reduces energy consumption and equipment costs, improves the completeness and stability of exhaust gas combustion, and reduces harmful gas emissions.
Smart Images
Figure CN122015103A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of waste gas treatment technology, and in particular to an energy-saving device and treatment method suitable for large-scale intermittent VOC gas combustion. Background Technology
[0002] Volatile organic compounds (VOCs) are a common type of industrial waste gas that poses a serious threat to the environment and human health. VOC treatment technologies mainly include adsorption, absorption, and incineration, with incineration being one of the most effective and widely used techniques. However, in actual industrial settings, intermittent emissions of large-volume, high-flow-rate waste gas are generated. When a sudden surge of this intermittently emitted large-flow-rate waste gas occurs, the waste gas treatment equipment will be unable to cope, resulting in incomplete treatment and severe environmental pollution. Summary of the Invention
[0003] This application provides an energy-saving device suitable for large-volume intermittent VOC gas combustion, which can simultaneously meet the treatment needs of small-volume and large-volume waste gas.
[0004] Another objective of this application is to provide a processing method.
[0005] To achieve the above objectives, according to a first aspect of this application, an energy-saving device suitable for large-scale intermittent VOC gas combustion is provided, comprising: A first housing, the first housing having a first cavity and a first exhaust gas inlet and a first air inlet communicating with the first cavity, the first exhaust gas inlet being configured to deliver exhaust gas into the first cavity, and the first air inlet being configured to deliver air into the first cavity; The second housing is disposed above the first housing along the height direction. The second housing is provided with a second cavity and a second exhaust gas inlet communicating with the second cavity. The second cavity is connected to the first cavity, and the second exhaust gas inlet is configured to deliver exhaust gas into the second cavity. The flow rate of the exhaust gas flowing through the second exhaust gas inlet is greater than the flow rate of the exhaust gas flowing through the first exhaust gas inlet.
[0006] Optionally, the volume of the second cavity is larger than the volume of the first cavity.
[0007] Optionally, the second housing is further provided with a first fuel inlet, which is configured to deliver fuel into the second cavity.
[0008] Optionally, the energy-saving device suitable for large-intermittent VOC gas combustion further includes: A first enclosure member, located outside the first housing, and enclosing the first housing to form a first exhaust gas distribution cavity and a first air distribution cavity, wherein the first enclosure member is provided with a first exhaust gas inlet and a first air inlet, both of which are connected to the first exhaust gas distribution cavity, and both of which are connected to the first air distribution cavity; and / or, The second enclosure is located outside the second housing and forms a second exhaust gas distribution cavity with the second housing. The second enclosure is provided with a second exhaust gas interface. Both the second exhaust gas interface and the second exhaust gas inlet are connected to the second exhaust gas distribution cavity. The second exhaust gas interface is provided with a first fuel interface, which is connected to the second exhaust gas distribution chamber through the second exhaust gas interface, and / or the second enclosure is provided with a first fuel interface, which is connected to the second exhaust gas distribution chamber.
[0009] Optionally, the first air inlet is positioned above the first exhaust gas inlet along the height direction.
[0010] Optionally, the energy-saving device suitable for large intermittent VOC gas combustion further includes a burner, at least a portion of which is disposed within the first housing; In the height direction, the first exhaust gas inlet is located near the bottom of the burner, the first air inlet is located near the middle of the burner, and the second exhaust gas inlet and the first fuel inlet are both located near the top of the burner.
[0011] Optionally, the number of the first exhaust gas inlets is one or more, and at least one of the first exhaust gas inlets is arranged at circumferential intervals along the first housing; and / or, The number of the first air inlets is one or more, and at least one of the first air inlets is arranged at circumferential intervals along the first housing; and / or, The number of the second exhaust gas inlets is one or more, and at least one of the second exhaust gas inlets is arranged at circumferential intervals along the second housing.
[0012] Optionally, at least one of the central axis of the first exhaust gas inlet and the central axis of the first air inlet does not intersect with the central axis of the first housing; and / or, The central axis of the second exhaust gas inlet does not intersect with the central axis of the second housing.
[0013] Optionally, the energy-saving device suitable for large-intermittent VOC gas combustion further includes: Multiple first baffles are spaced apart and disposed on the inner wall surface of the first cavity; and / or, Multiple second flow deflectors are spaced apart on the inner wall surface of the second cavity.
[0014] Optionally, the energy-saving device suitable for large intermittent VOC gas combustion further includes a third housing, which is disposed along the height direction on the side of the second housing away from the first housing. The third housing is provided with a third cavity and a second air inlet communicating with the third cavity. The third cavity is connected to the second cavity, and the second air inlet is configured to supply air into the third cavity. Wherein, the number of the second air inlets is one or more, and at least one of the second air inlets is arranged at circumferential intervals along the third housing; and / or, The central axis of the second air inlet does not intersect the central axis of the third housing; and / or, The energy-saving device suitable for large-intermittent VOC gas combustion also includes multiple third flow-disrupting elements, which are spaced apart on the inner wall surface of the third cavity.
[0015] Optionally, the energy-saving device suitable for large intermittent VOC gas combustion further includes a third enclosure component, which is located outside the third housing and forms a second air distribution cavity with the third housing. The third enclosure component is provided with a second air interface, and both the second air interface and the second air inlet are connected to the second air distribution cavity.
[0016] According to a second aspect of this application, a processing method is provided, applied to an energy-saving device suitable for large-scale intermittent VOC gas combustion as described in any one of the above claims, the processing method comprising: When the flow rate of the exhaust gas is less than or equal to the first preset value, the exhaust gas enters the first cavity through the first exhaust gas inlet; When the flow rate of the exhaust gas exceeds the first preset value, the exhaust gas enters the second cavity through the second exhaust gas inlet.
[0017] Optionally, the second housing is further provided with a first fuel inlet. When the flow rate of the exhaust gas is greater than a first preset value and the concentration of combustibles in the exhaust gas is lower than a second preset value, fuel is supplied to the second cavity through the first fuel inlet.
[0018] Optionally, air is supplied into the first cavity through the first air inlet to mix the exhaust gas and air within the first cavity; and / or, The energy-saving device suitable for large intermittent VOC gas combustion also includes a third housing, which is provided with a third cavity and a second air inlet communicating with the third cavity. Air is supplied to the third cavity through the second air inlet to mix with unburned components generated in the first cavity and / or the second cavity and to undergo a combustion reaction.
[0019] The energy-saving device and treatment method for large-volume intermittent VOC gas combustion in this application embodiment includes a first shell and a second shell. The waste gas is treated in stages according to its flow rate. The first shell and the second shell respectively correspond to the treatment of small-volume and large-volume waste gas, simultaneously meeting the treatment needs of both. Small-volume waste gas flows into the first chamber for combustion, achieving combustion under low load conditions, reducing heat loss, and thus lowering operating energy consumption. Large-volume waste gas flows into the second chamber for combustion, improving the completeness of combustion and reducing harmful gas emissions. This segmented structural design avoids the structural redundancy caused by designing traditional devices based on maximum flow rate, enabling operation under different loads and balancing energy saving and emission reduction with high-load processing capacity.
[0020] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of 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.
[0022] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.
[0023] Figure 1 This is a cross-sectional schematic diagram of an energy-saving device for large-intermittent VOC gas combustion provided in an exemplary embodiment of this disclosure; Figure 2 yes Figure 1 An enlarged schematic diagram of part A in the middle; Figure 3 This is a three-dimensional structural schematic diagram of an energy-saving device suitable for large-intermittent VOC gas combustion provided in an exemplary embodiment of this disclosure; Figure 4This is a schematic diagram of the planar structure of an energy-saving device suitable for large-intermittent VOC gas combustion provided in an exemplary embodiment of this disclosure; Figure 5 It is along Figure 4 Schematic diagram of the cross section of line AA; Figure 6 It is along Figure 4 Schematic diagram of the cross section of the middle BB line; Figure 7 It is along Figure 4 A cross-sectional view of the middle CC line; Figure 8 It is along Figure 4 Schematic diagram of the cross section of the DD line; Figure 9 This is a partial structural schematic diagram of the first, second, and third spoilers provided in an exemplary embodiment of this disclosure.
[0024] Explanation of reference numerals in the attached figures: 1. First housing; 11. First cavity; 12. First exhaust gas inlet; 13. First air inlet; 14. First baffle; 2. Second housing; 21. Second cavity; 22. Second exhaust gas inlet; 23. First fuel inlet; 24. Second baffle; 3. Third housing; 31. Third cavity; 32. Second air inlet; 33. Third baffle; 4. First enclosure; 41. First exhaust gas distribution cavity; 42. First air distribution cavity; 43. First exhaust gas interface; 44. First air interface; 45. Separator; 5. Second enclosure; 51. Second exhaust gas distribution cavity; 52. Second exhaust gas interface; 53. First fuel interface; 6. Third enclosure; 61. Second air distribution cavity; 62. Second air interface; 7. Burner; 71. Second fuel inlet; 72. Third air inlet; 8. Night light; Z, height direction. Detailed Implementation
[0025] 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. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "up," "down," "left," and "right" generally refer to up, down, left, and right in the actual use or working state of the device, specifically the drawing directions in the accompanying drawings.
[0026] In this application, unless otherwise expressly specified and limited, the terms "connected," "linked," "stacked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0027] In industrial production processes, there are instances of intermittent emissions of large volumes of VOCs (volatile organic compounds). The volumetric flow rate of these large intermittent emissions is comparable to the sum of the VOCs emitted by the enterprise under normal circumstances. Normal VOC emissions typically exhibit characteristics such as small flow rates, minimal fluctuations, or intermittent emissions, requiring treatment alongside these large intermittent emissions. However, designing the waste gas treatment system based on the total volume of all emissions, while meeting peak treatment demands, would result in an excessively large overall size and high redundancy, leading to wasted equipment investment and energy. Conversely, designing it only for the small flow rates of normal emissions would overwhelm the system when large intermittent emissions suddenly surge in, resulting in inadequate treatment and severe environmental pollution.
[0028] In view of this, this application provides an energy-saving device and treatment method suitable for large-scale intermittent VOC gas combustion, which will be described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments of this application. Furthermore, in the following embodiments, the descriptions of each embodiment have their own emphasis; parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments.
[0029] According to the first aspect of this application, referring to Figures 1 to 3 One embodiment of this application provides an energy-saving device suitable for large-intermittent VOC gas combustion, which may include: a first housing 1 and a second housing 2.
[0030] Specifically, refer to Figures 4 to 6 The first housing 1 can be cylindrical or similar in shape. The first housing 1 may have a first cavity 11 and a first exhaust gas inlet 12 and a first air inlet 13 communicating with the first cavity 11. The first housing 1 has the first exhaust gas inlet 12 and the first air inlet 13, and the interior of the first housing 1 forms the first cavity 11. The first exhaust gas inlet 12 is configured to supply exhaust gas into the first cavity 11, where the exhaust gas can be combusted. The first air inlet 13 is configured to supply air into the first cavity 11, where the air assists in the combustion of the exhaust gas.
[0031] Reference Figure 1 and Figure 2The second housing 2 can be positioned above the first housing 1 along the height direction Z. The second housing 2 can also be cylindrical or similar in shape. The second housing 2 can have a second cavity 21 and a second exhaust gas inlet 22 communicating with the second cavity 21. The second cavity 21 can communicate with the first cavity 11. The second housing 2 has a second exhaust gas inlet 22, and the interior of the second housing 2 forms the second cavity 21. The second exhaust gas inlet 22 is configured to supply exhaust gas into the second cavity 21, where the exhaust gas can be combusted. The second housing 2 and the first housing 1 can be connected by flanges, welding, or other methods. Alternatively, the second housing 2 and the first housing 1 can be an integrally formed structure.
[0032] In some embodiments, the flow rate of exhaust gas flowing through the second exhaust gas inlet 22 is greater than the flow rate of exhaust gas flowing through the first exhaust gas inlet 12. It is understood that the first chamber 11 can serve as the primary combustion zone for low-flow exhaust gas, which can flow into the first chamber 11 through the first exhaust gas inlet 12. The second chamber 21 can serve as the primary combustion zone for intermittently emitted high-flow exhaust gas, which can flow into the second chamber 21 through the second exhaust gas inlet 22.
[0033] As an example, low-flow exhaust gas can be discharged regularly, while high-flow exhaust gas can be discharged intermittently. The flow rate of the exhaust gas can be detected by a flow sensor (not shown), and the sensor's detection value can be compared with a first preset value, such as 3600 Nm³ / h. When the exhaust gas flow rate is less than or equal to the first preset value, i.e., it is low-flow exhaust gas, the exhaust gas can flow into the first cavity 11 through the first exhaust gas inlet 12. When the exhaust gas flow rate is greater than the first preset value, i.e., it is high-flow exhaust gas, the exhaust gas can flow into the second cavity 21 through the second exhaust gas inlet 22. At this time, some of the exhaust gas can also flow into the first cavity 11 through the first exhaust gas inlet 12.
[0034] In this application, the waste gas is treated in stages according to its flow rate. The first housing 1 and the second housing 2 are respectively designed for treating small-flow and large-flow waste gas, thus simultaneously meeting the treatment needs of both types of waste gas. Small-flow waste gas flows into the first chamber 11 for incineration, achieving combustion under low load conditions, reducing heat loss, and consequently lowering operating energy consumption. Large-flow waste gas flows into the second chamber 21 for incineration, improving the completeness of combustion and reducing the emission of harmful gases. This segmented structural design avoids the structural redundancy caused by designing based on maximum flow rate in traditional devices, simplifies the overall structure, reduces initial investment costs, and enables operation under different loads, balancing energy conservation and emission reduction with high-load processing capacity. In addition, the second housing 2 is positioned above the first housing 1 along the height direction Z. This allows the small-flow exhaust gas to form a stable flame when burned in an energy-saving device suitable for large-intermittent VOC gas combustion. This flame can contact and ignite the large-flow exhaust gas, and the large-flow exhaust gas flows above the flame. This reduces the impact of the large-flow exhaust gas on the flame, thereby improving the flame's stability and reducing the risk of flame extinction.
[0035] In some embodiments, since the second chamber 21 is mainly used to treat large-flow exhaust gas, which requires sufficient combustion space, the volume of the second chamber 21 can be larger than the volume of the first chamber 11. This can also provide a longer residence time for the combustion reaction, thereby improving the completeness of exhaust gas combustion. As an example, the volume of the second chamber 21 can be 1.5 to 4 times the volume of the first chamber 11.
[0036] In some embodiments, refer to Figure 2 The second housing 2 may also be provided with a first fuel inlet 23, which is configured to supply fuel, such as natural gas or liquefied petroleum gas, into the second cavity 21. The fuel can increase the calorific value of the exhaust gas, thereby improving combustion stability. The first fuel inlet 23 and the second exhaust gas inlet 22 can be the same inlet, or they can be independent inlets. In this embodiment, the first fuel inlet 23 and the second exhaust gas inlet 22 can be the same inlet, meaning that fuel or exhaust gas can be supplied into the second cavity 21 through this inlet.
[0037] As an example, the concentration of combustibles in the exhaust gas can be detected by a combustible concentration sensor (not shown), and the detected value can be compared with a second preset value, such as 1000 mg / m³. When the concentration of combustibles in the large-flow exhaust gas is lower than the second preset value, fuel is supplied to the second chamber 21 through the first fuel inlet 23, and the fuel mixes with the exhaust gas to increase the concentration of combustibles in the exhaust gas. When the concentration of combustibles in the large-flow exhaust gas is higher than or equal to the second preset value, the exhaust gas can burn normally, and fuel does not need to be supplied to the second chamber 21, thus reducing fuel costs. In this application, by controlling the opening of the first fuel inlet 23, the combustion of exhaust gas containing different concentrations of combustibles can be achieved, thereby expanding the applicability of energy-saving devices suitable for large-intermittent VOC gas combustion.
[0038] In some embodiments, refer to Figure 2 and Figure 3 An energy-saving device suitable for large-intermittent VOC gas combustion may further include a first enclosure 4, which may be located outside the first housing 1 and connected to the first housing 1 by bolts, welding, or other means. The first enclosure 4 and the first housing 1 can enclose a first exhaust gas distribution chamber 41 and a first air distribution chamber 42. The first exhaust gas distribution chamber 41 and the first air distribution chamber 42 may be isolated from or connected to each other. The number of first exhaust gas distribution chambers 41 and the number of first air distribution chambers 42 may be one or more. The number of first exhaust gas distribution chambers 41 and the number of first air distribution chambers 42 can be set as needed. When there are multiple first exhaust gas distribution chambers 41 and multiple first air distribution chambers 42, the multiple first exhaust gas distribution chambers 41 and multiple first air distribution chambers 42 may be staggered in the height direction Z. In this embodiment, the first exhaust gas distribution chambers 41 and the first air distribution chambers 42 are isolated from each other to avoid gas interference. The number of first exhaust gas distribution chambers 41 and the number of first air distribution chambers 42 are both one, and the first exhaust gas distribution chamber 41 can be located below the first air distribution chamber 42.
[0039] Reference Figure 2 and Figure 3The first enclosure 4 may be provided with a first exhaust gas inlet 43 and a first air inlet 44. The first exhaust gas inlet 43 is used to receive a small flow of exhaust gas. Both the first exhaust gas inlet 43 and the first exhaust gas inlet 12 can be connected to the first exhaust gas distribution chamber 41. The small flow of exhaust gas can enter the first exhaust gas distribution chamber 41 through the first exhaust gas inlet 43, and then enter the first cavity 11 through the first exhaust gas inlet 12. The first air inlet 44 is used to receive air. Both the first air inlet 44 and the first air inlet 13 can be connected to the first air distribution chamber 42. Air can enter the first air distribution chamber 42 through the first air inlet 44, and then enter the first cavity 11 through the first air inlet 13. The number of first exhaust gas inlets 43 and the number of first air inlets 44 can be one or more. The number of first exhaust gas inlets 43 and the number of first air inlets 44 can be set as needed. In this embodiment, the number of first exhaust gas inlets 43 and the number of first air inlets 44 are both one.
[0040] The number of first enclosure members 4 can be one or more. When there is only one first enclosure member 4, a partition 45 can be provided between the first exhaust gas distribution chamber 41 and the first air distribution chamber 42, which can isolate the first exhaust gas distribution chamber 41 and the first air distribution chamber 42 from each other. It is understood that the first enclosure member 4 can enclose the first housing 1 to form a large cavity, and a partition 45 can be provided within the cavity to divide the cavity into the first exhaust gas distribution chamber 41 and the first air distribution chamber 42. When there are multiple first enclosure members 4, the multiple first enclosure members 4 can be respectively arranged corresponding to the first exhaust gas distribution chamber 41 and the first air distribution chamber 42. The multiple first enclosure members 4 can be spaced apart from each other or closely attached to each other.
[0041] As an example, there is one first enclosure member 4. The first enclosure member 4 and the first housing 1 enclose a first exhaust gas distribution chamber 41 and a first air distribution chamber 42, which are isolated from each other by a partition 45. The first enclosure member 4 may be provided with a first exhaust gas inlet 43 and a first air inlet 44.
[0042] Reference Figure 2 and Figure 3 The energy-saving device suitable for large-intermittent VOC gas combustion may further include a second enclosure 5. The second enclosure 5 may be located outside the second housing 2, and the second enclosure 5 and the second housing 2 may be connected by bolts, welding, or other means. The second enclosure 5 and the second housing 2 can enclose to form a second exhaust gas distribution chamber 51. The number of second exhaust gas distribution chambers 51 may be one or more, and the number of second exhaust gas distribution chambers 51 may be set as needed. In this embodiment, the number of second exhaust gas distribution chambers 51 is one.
[0043] The second enclosure 5 may be provided with a second exhaust gas inlet 52, which is used to connect a large flow of exhaust gas. Both the second exhaust gas inlet 52 and the second exhaust gas inlet 22 can be connected to the second exhaust gas distribution chamber 51. The large flow of exhaust gas can enter the second exhaust gas distribution chamber 51 through the second exhaust gas inlet 52, and then enter the second chamber 21 through the second exhaust gas inlet 22. The number of second exhaust gas inlets 52 can be one or more, and the number of second exhaust gas inlets 52 can be set as needed. In this embodiment, the number of second exhaust gas inlets 52 is one.
[0044] In some embodiments, refer to Figure 2 and Figure 3 The second exhaust gas inlet 52 may be equipped with a first fuel inlet 53, which is used to receive fuel. The first fuel inlet 53 can be connected to the second exhaust gas distribution chamber 51 through the second exhaust gas inlet 52. Fuel can enter the second exhaust gas inlet 52 through the first fuel inlet 53, and then enter the second exhaust gas distribution chamber 51. The fuel can mix with the exhaust gas in the second exhaust gas distribution chamber 51, and then enter the second cavity 21 through the second exhaust gas inlet 22. The second enclosure member 5 may also be equipped with a first fuel inlet 53, which is used to receive fuel and can be connected to the second exhaust gas distribution chamber 51. Fuel can enter the second exhaust gas distribution chamber 51 through the first fuel inlet 53, and the fuel can mix with the exhaust gas in the second exhaust gas distribution chamber 51, and then enter the second cavity 21 through the second exhaust gas inlet 22. The number of first fuel inlets 53 can be one or more, and the number of first fuel inlets 53 can be set as needed.
[0045] As an example, the second enclosure 5 and the second housing 2 enclose a second exhaust gas distribution cavity 51, and the second enclosure 5 is provided with a second exhaust gas inlet 52. A first fuel inlet 53 is provided on the second exhaust gas inlet 52.
[0046] In some embodiments, refer to Figure 2 and Figure 4An energy-saving device suitable for large-intermittent VOC gas combustion may further include a burner 7, at least a portion of which may be housed within the first housing 1. The burner 7 may be a fully premixed metal fiber burner 7 or a non-premixed diffusion burner 7, etc., and is used to ignite the exhaust gas. A second fuel inlet 71 and a third air inlet 72 may be provided at the bottom of the burner 7, through which fuel and air may be supplied respectively. A continuous lamp 8 is also provided at the bottom of the energy-saving device suitable for large-intermittent VOC gas combustion, relative to the side of the burner 7. The continuous lamp 8 serves as an initial ignition source, igniting the fuel entering the burner 7 through the second fuel inlet 71 and / or the exhaust gas entering the first chamber 11. The continuous lamp 8 has a low power, reducing energy consumption. There may be one or more continuous lamps 8. In this embodiment, there are two continuous lamps 8, symmetrically arranged on both sides of the burner 7.
[0047] In some embodiments, refer to Figure 2 and Figure 3 The first air inlet 13 can be positioned above the first exhaust gas inlet 12 along the height direction Z. If the exhaust gas and air enter the first cavity 11 on the same plane, it may lead to excessively vigorous combustion or an unstable flame root. By positioning the first exhaust gas inlet 12 at the bottom, the exhaust gas, after entering from the bottom, first contacts the burner 7 or the pilot light 8, forming an initial combustion zone (flame root) rich in combustibles, which helps to form a stable flame. By positioning the first air inlet 13 at the top, the air entering from the top meets the already ignited rising airflow, which helps to ensure complete combustion of the exhaust gas. If, conversely, the air enters from the bottom, it may scatter the flame.
[0048] As an example, in the vertical direction Z, the first exhaust gas inlet 12 can be located near the bottom of the burner 7, the first air inlet 13 can be located near the middle of the burner 7, and the second exhaust gas inlet 22 and the first fuel inlet 23 can both be located near the top of the burner 7. This arrangement allows small-flow exhaust gas and air to form a stable flame near the burner 7, while large-flow exhaust gas and fuel can contact and ignite the flame above it, thereby improving combustion stability.
[0049] In some embodiments, the burner 7 can automatically adjust its output power based on changes in the flow rate of the exhaust gas and the concentration of combustibles in the exhaust gas. For example, when the concentration of combustibles in the exhaust gas is high, the exhaust gas can burn continuously. The exhaust gas can be ignited by the open flame continuously generated by the continuous flame lamp 8. In this case, the burner 7 does not need to provide heat for the combustion of the exhaust gas, and fuel does not need to be supplied to the burner 7 through the second fuel inlet 71, which helps reduce unnecessary fuel consumption and lower costs. When the exhaust gas cannot burn continuously, both the burner 7 and the continuous flame lamp 8 can be turned on. Fuel is supplied to the burner 7 through the second fuel inlet 71 to provide sufficient heat for the combustion of the exhaust gas, and the continuous flame lamp 8 can provide the initial ignition source for the burner 7 to ignite the fuel. As the concentration of combustibles in the exhaust gas increases, the power of the burner 7 can be reduced to reduce unnecessary fuel consumption and lower costs.
[0050] During the operation of burner 7, air can also be supplied to burner 7 through the third air inlet 72, which helps to fully combust the exhaust gas and also helps to protect the metal mesh on the surface of burner 7, thereby extending the service life of burner 7.
[0051] In some embodiments, refer to Figure 5 The number of first exhaust gas inlets 12 can be one or more, and at least one first exhaust gas inlet 12 can be arranged at intervals along the circumference of the first housing 1. As an example, to achieve uniform distribution of small-flow exhaust gas, the number of first exhaust gas inlets 12 is four, and the four first exhaust gas inlets 12 are evenly spaced along the circumference of the first housing 1. Small-flow exhaust gas can enter the first exhaust gas distribution chamber 41 through the first exhaust gas interface 43, and then enter the first cavity 11 through the four first exhaust gas inlets 12 respectively. This can make the small-flow exhaust gas evenly distributed in the first cavity 11, which is beneficial to the uniform and sufficient mixing of exhaust gas and air. In some embodiments, at least some of the first exhaust gas inlets 12 can be arranged at intervals along the axial direction of the first housing 1, that is, the first exhaust gas inlets 12 can be arranged in layers along the axial direction of the first housing 1.
[0052] Reference Figure 6 The number of first air inlets 13 can be one or more, and at least one first air inlet 13 can be arranged at intervals along the circumference of the first housing 1. As an example, to achieve uniform air distribution, the number of first air inlets 13 is four, and the four first air inlets 13 are evenly spaced along the circumference of the first housing 1. Air can enter the first air distribution cavity 42 through the first air interface 44, and then enter the first cavity 11 through the four first air inlets 13 respectively. This can make the air evenly distributed in the first cavity 11, which is beneficial to the uniform and sufficient mixing of air and exhaust gas. In some embodiments, at least some of the first air inlets 13 can be arranged at intervals along the axial direction of the first housing 1, that is, the first air inlets 13 can be arranged in layers along the axial direction of the first housing 1.
[0053] Reference Figure 7 The number of second exhaust gas inlets 22 can be one or more, and at least one second exhaust gas inlet 22 can be arranged at intervals along the circumference of the second housing 2. As an example, to achieve uniform distribution of high-flow exhaust gas, the number of second exhaust gas inlets 22 is four, and the four second exhaust gas inlets 22 are evenly spaced along the circumference of the second housing 2. High-flow exhaust gas can enter the second exhaust gas distribution chamber 51 through the second exhaust gas interface 52, and then enter the second cavity 21 through the second exhaust gas inlets 22. This allows the high-flow exhaust gas to be evenly distributed in the second cavity 21, which is beneficial for the uniform and sufficient mixing of exhaust gas, fuel, and air. In some embodiments, at least some of the second exhaust gas inlets 22 can be arranged at intervals along the axial direction of the second housing 2, that is, the second exhaust gas inlets 22 can be arranged in layers along the axial direction of the second housing 2. In some embodiments, fuel can also enter the second exhaust gas distribution chamber 51 sequentially through the first fuel interface 53 and the second exhaust gas interface 52, and then enter the second cavity 21 through the second exhaust gas inlets 22. This allows the fuel to be evenly distributed in the second cavity 21, which is beneficial for the uniform and sufficient mixing of fuel, exhaust gas, and air.
[0054] In some embodiments, refer to Figure 5 and Figure 6 At least one of the central axes of the first exhaust gas inlet 12 and the first air inlet 13 does not intersect the central axis of the first housing 1. In this embodiment, the central axes of both the first exhaust gas inlet 12 and the first air inlet 13 may not intersect the central axis of the first housing 1. It can be understood that the central axes of both the first exhaust gas inlet 12 and the first air inlet 13 may intersect the radial direction of the first housing 1. In this way, a small flow of exhaust gas can be tangentially injected into the first cavity 11 through the first exhaust gas inlet 12 and flow along the circular inner wall, thereby causing the small flow of exhaust gas to swirl. Similarly, air can be tangentially injected into the first cavity 11 through the first air inlet 13 and flow along the circular inner wall, thereby causing the air to swirl. This arrangement allows the gas delivered to the first cavity 11 to swirl, which can also drive the flame to swirl, which is beneficial for the thorough mixing of exhaust gas, air and flame, thereby improving the combustion rate of exhaust gas. As an example, the central axis of the first exhaust gas inlet 12 can form an angle of 30° to 60° with the tangent direction of the first housing 1, and the central axis of the first air inlet 13 can also form an angle of 30° to 60° with the tangent direction of the first housing 1.
[0055] Reference Figure 7The central axis of the second exhaust gas inlet 22 does not intersect with the central axis of the second housing 2. Similarly, the central axis of the first fuel inlet 23 does not intersect with the central axis of the second housing 2. In this embodiment, since the first fuel interface 53 is located at the second exhaust gas interface 52, the first fuel inlet 23 and the second exhaust gas inlet 22 can share the same inlet. It is understood that the central axes of both the second exhaust gas inlet 22 and the first fuel inlet 23 can intersect the radial direction of the second housing 2. This allows a large flow of exhaust gas and fuel to be tangentially injected into the second cavity 21 through the same inlet, flowing along the circular inner wall, thereby creating a swirling flow. This arrangement allows the gas delivered to the second cavity 21 to swirl, which in turn drives the flame to swirl, promoting thorough mixing of exhaust gas, fuel, and flame, and improving the combustion rate of the exhaust gas. As an example, the central axis of the second exhaust gas inlet 22 can form an angle of 30° to 60° with the tangent direction of the second housing 2.
[0056] In some embodiments, refer to Figure 2 , Figure 5 and Figure 6 An energy-saving device suitable for large-intermittent VOC gas combustion may further include multiple first flow disruptors 14, which may be spaced apart on the inner wall of the first cavity 11 along the circumferential and / or axial direction of the first housing 1. During the gas flow in the first cavity 11, some gas may collide with the first flow disruptors 14 (e.g., Figure 9 As shown in the figure, this can change the direction of the airflow to create disturbance, promote the exchange of matter between the inner and outer layers of the swirling field, further improve the uniformity of gas mixing, and thus improve the completeness of combustion.
[0057] Reference Figure 2 and Figure 7 An energy-saving device suitable for large-intermittent VOC gas combustion may further include multiple second flow-disrupting elements 24, which may be spaced apart along the circumferential and / or axial direction of the second housing 2 on the inner wall of the second cavity 21. During the gas flow in the second cavity 21, some gas collides with the second flow-disrupting elements 24 (e.g., Figure 9 As shown in the figure, this can change the direction of the airflow to create disturbance, promote the exchange of matter between the inner and outer layers of the swirling field, further improve the uniformity of gas mixing, and thus improve the completeness of combustion.
[0058] In some embodiments, refer to Figure 2 and Figure 3An energy-saving device suitable for large-intermittent VOC gas combustion may also include a third housing 3, which is positioned along the height direction Z on the side of the second housing 2 away from the first housing 1. The third housing 3 may also be cylindrical or other structures. The third housing 3 may have a third cavity 31 and a second air inlet 32 communicating with the third cavity 31. The third cavity 31 may be connected to the second cavity 21. The function of the third housing 3 is to provide a combustion zone. The flue gas after combustion in the first cavity 11 and the second cavity 21 may still contain unburned components. Air is introduced into the third cavity 31 through the second air inlet 32. This air mixes with the flue gas, and the unburned components are oxidized again under high temperature, thereby further improving the combustion rate of the exhaust gas.
[0059] Reference Figure 2 and Figure 8 The third housing 3 may be provided with a second air inlet 32, and the interior of the third housing 3 forms a third cavity 31. The second air inlet 32 is configured to supply air into the third cavity 31 to mix with unburned components generated in the first cavity 11 and / or the second cavity 21 and to undergo a combustion reaction. The third housing 3 and the second housing 2 may be connected by flanges, welding, or other means. The third housing 3 and the second housing 2 may also be an integrally formed structure. In some embodiments, at least some of the second air inlets 32 may be arranged at intervals along the axial direction of the third housing 3, that is, the second air inlets 32 may be arranged in layers along the axial direction of the third housing 3.
[0060] The number of second air inlets 32 can be one or more, and at least one second air inlet 32 can be arranged at intervals along the circumference of the third housing 3. As an example, to achieve uniform air distribution, the number of second air inlets 32 is four, and the four second air inlets 32 are evenly spaced along the circumference of the third housing 3. Air can enter the second air distribution chamber 61 through the second air interface 62, and then enter the third chamber 31 through the four second air inlets 32 respectively. This allows the air to be evenly distributed in the third chamber 31, which is beneficial for the uniform and thorough mixing of air and exhaust gas.
[0061] Reference Figure 8 The central axis of the second air inlet 32 does not intersect with the central axis of the third housing 3. It is understood that the central axis of the second air inlet 32 can intersect with the radial direction of the third housing 3. In this way, air can be tangentially injected into the third cavity 31 through the second air inlet 32, flowing along the circular inner wall, thereby creating a swirling flow. This arrangement allows the gas delivered into the third cavity 31 to generate a swirling flow, which in turn can drive the flame to generate a swirling flow, promoting thorough mixing of exhaust gas, air, and flame, and improving the combustion rate of the exhaust gas. As an example, the central axis of the second air inlet 32 can form an angle of 30° to 60° with the tangent direction of the third housing 3.
[0062] Reference Figure 2 and Figure 8 An energy-saving device suitable for large-intermittent VOC gas combustion may further include multiple third flow-disrupting elements 33, which may be spaced apart along the circumferential and / or axial direction of the third housing 3 on the inner wall of the third cavity 31. During the gas flow in the third cavity 31, some gas collides with the third flow-disrupting elements 33 (e.g., Figure 9 As shown in the figure, this can change the direction of the airflow to create disturbance, promote the exchange of matter between the inner and outer layers of the swirling field, further improve the uniformity of gas mixing, and thus improve the completeness of combustion.
[0063] In some embodiments, refer to Figure 3 and Figure 8 An energy-saving device suitable for large-intermittent VOC gas combustion may also include a third enclosure 6, which may be located outside the third housing 3 and connected to the third housing 3 by bolts, welding, or other means. The third enclosure 6 and the third housing 3 can enclose and form a second air distribution cavity 61. There may be one or more second air distribution cavities 61, and the number of second air distribution cavities 61 can be set as needed.
[0064] Reference Figure 8 The third enclosure 6 may be equipped with a second air inlet 62, which is used to access air. Both the second air inlet 62 and the second air inlet 32 can be connected to the second air distribution cavity 61. Air can enter the second air distribution cavity 61 through the second air inlet 62, and then enter the third cavity 31 through the second air inlet 32. There can be one or more second air inlets 62, and the number of second air inlets 62 can be set as needed.
[0065] As an example, the third enclosure 6 and the third housing 3 enclose a second air distribution cavity 61, and the third enclosure 6 is provided with a second air interface 62.
[0066] According to a second aspect of this application, one embodiment of this application provides a processing method applied to an energy-saving device suitable for large-intermittent VOC gas combustion as described above. The processing method may include the following steps.
[0067] When the flow rate of the exhaust gas is less than or equal to the first preset value, the exhaust gas enters the first cavity 11 through the first exhaust gas inlet 12.
[0068] Specifically, when the exhaust gas flow rate is less than or equal to a first preset value, for example, when the exhaust gas flow rate is less than or equal to 3600 Nm³ / h, it is judged as low-flow exhaust gas. At this time, the exhaust gas can enter the first cavity 11 through the first exhaust gas inlet 12, and the burner 7 and / or the continuous lamp 8 can ignite the exhaust gas, forming a stable swirling flame in the first cavity 11. In this embodiment, the exhaust gas can enter the first exhaust gas distribution cavity 41 through the first exhaust gas interface 43, and then enter the first cavity 11 through the four first exhaust gas inlets 12 to form a swirling flow. Air can enter the first air distribution cavity 42 through the first air interface 44, and then enter the first cavity 11 through the four first air inlets 13 to form a swirling flow. The exhaust gas and air mix in the first cavity 11, and the mixed gas can come into contact with and ignite the flame generated by the burner 7 and / or the continuous lamp 8, forming a stable swirling flame in the first cavity 11. During combustion, the first turbulence element 14 can enhance airflow disturbance and promote gas mixing, thereby improving the completeness of combustion.
[0069] In the treatment of low-flow-rate exhaust gas, the concentration of combustibles in the exhaust gas can be detected, and the power of burner 7 can be adjusted according to the concentration of combustibles in the exhaust gas. As the concentration of combustibles in the exhaust gas increases, the power of burner 7 can be reduced or burner 7 can be shut off, that is, the opening of the second fuel inlet 71 can be reduced or the second fuel inlet 71 can be closed to reduce or stop the supply of fuel to burner 7. As an example, when the concentration of combustibles in the exhaust gas is high, for example, when the concentration of combustibles in the exhaust gas is greater than or equal to 2000 mg / m³, the exhaust gas can be ignited by the continuous lamp 8. In this case, it is not necessary to supply fuel to burner 7, and the second fuel inlet 71 can be closed. In some embodiments, when there are no pollutants (such as volatile organic compounds) in the exhaust gas, it is also not necessary to supply fuel to burner 7, and the second fuel inlet 71 can be closed. When the concentration of combustibles in the exhaust gas is low, for example, when the concentration of combustibles in the exhaust gas is less than 2000 mg / m³, the exhaust gas cannot continue to burn. At this time, it is necessary to open the second fuel inlet 71, supply fuel to the burner 7 through the second fuel inlet 71, and ignite it through the continuous lamp 8 to provide sufficient heat for the combustion of exhaust gas, thereby improving the stability of combustion.
[0070] During the operation of burner 7, air can be supplied to burner 7 through the third air inlet 72, which helps to fully combust the exhaust gas and also helps to protect the metal mesh on the surface of burner 7, thereby extending the service life of burner 7.
[0071] When the exhaust gas flow rate exceeds a first preset value, for example, when the exhaust gas flow rate exceeds 3600 Nm³ / h, it is judged as high-flow exhaust gas. At this time, the exhaust gas can enter the second cavity 21 and the first cavity 11 respectively through the second exhaust gas inlet 22 and the first exhaust gas inlet 12. In this example, the exhaust gas can enter the second exhaust gas distribution cavity 51 through the second exhaust gas interface 52, and then enter the second cavity 21 through the four second exhaust gas inlets 22 to form a swirling flow. This high-flow exhaust gas, within the larger second cavity 21, can provide a longer residence time for the combustion reaction, thereby improving the completeness of combustion. Simultaneously, the flame located at the top of the first cavity 11 acts as an ignition source, igniting the exhaust gas entering the second cavity 21, achieving stable combustion of the high-flow exhaust gas. During combustion, the second turbulence element 24 can enhance airflow turbulence and promote gas mixing, thereby improving the completeness of combustion.
[0072] In the process of treating high-flow-rate exhaust gas, the concentration of combustibles in the exhaust gas can be detected, and the flow rate of fuel entering the second chamber 21 can be adjusted according to the concentration of combustibles in the exhaust gas. As the concentration of combustibles in the exhaust gas increases, the flow rate of fuel entering the second chamber 21 can be reduced. As an example, when the concentration of combustibles in the exhaust gas is high, for example, when the concentration of combustibles in the exhaust gas is greater than or equal to 1000 mg / m³, the exhaust gas in the second chamber 21 can be ignited by the flame at the top of the first chamber 11. In this case, it is not necessary to supply fuel to the second chamber 21, and the first fuel port 53 can be closed. In some embodiments, when there are no pollutants (such as volatile organic compounds) in the exhaust gas, it is also not necessary to supply fuel to the second chamber 21. When the concentration of combustibles in the exhaust gas is low, for example, when the concentration of combustibles in the exhaust gas is less than 1000 mg / m³, the exhaust gas cannot continue to burn, and fuel can be supplied to the second chamber 21 through the first fuel port 53. Fuel can enter the second exhaust gas interface 52 through the first fuel interface 53, and then enter the second exhaust gas distribution chamber 51. The fuel can be mixed with the exhaust gas in the second exhaust gas distribution chamber 51, and then enter the second chamber 21 through the second exhaust gas inlet 22. This can increase the calorific value of the mixed gas, so that it can be ignited and burned stably.
[0073] In some embodiments, the energy-saving device suitable for large-intermittent VOC gas combustion may further include a third housing 3, which may be provided with a third chamber 31 and a second air inlet 32 communicating with the third chamber 31. After the exhaust gas is treated by the first chamber 11 and / or the second chamber 21, the resulting flue gas flows upward into the third chamber 31 of the third housing 3. Air may be supplied into the third chamber 31 through the second air inlet 32 as needed to mix with the unburned components generated in the first chamber 11 and / or the second chamber 21 and undergo a combustion reaction. As an example, air may enter the second air distribution chamber 61 through the second air interface 62, and then enter the third chamber 31 through four second air inlets 32 to form a swirling flow. The air mixes with the high-temperature flue gas, and the unburned components in the flue gas can be further burned in the third chamber 31. The treated flue gas can be discharged from the top of the third housing 3.
[0074] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0075] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.
[0076] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.
[0077] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.
Claims
1. An energy-saving device suitable for large-scale intermittent VOC gas combustion, characterized in that, include: A first housing, the first housing having a first cavity and a first exhaust gas inlet and a first air inlet communicating with the first cavity, the first exhaust gas inlet being configured to deliver exhaust gas into the first cavity, and the first air inlet being configured to deliver air into the first cavity; The second housing is disposed above the first housing along the height direction. The second housing is provided with a second cavity and a second exhaust gas inlet communicating with the second cavity. The second cavity is connected to the first cavity, and the second exhaust gas inlet is configured to deliver exhaust gas into the second cavity. The flow rate of the exhaust gas flowing through the second exhaust gas inlet is greater than the flow rate of the exhaust gas flowing through the first exhaust gas inlet.
2. The energy-saving device for large-scale intermittent VOC gas combustion according to claim 1, characterized in that, The volume of the second cavity is larger than the volume of the first cavity.
3. The energy-saving device for large-scale intermittent VOC gas combustion according to claim 1, characterized in that, The second housing is also provided with a first fuel inlet, which is configured to deliver fuel into the second cavity.
4. The energy-saving device for large-scale intermittent VOC gas combustion according to claim 3, characterized in that, The energy-saving device suitable for large-scale intermittent VOC gas combustion also includes: A first enclosure member, located outside the first housing, and enclosing the first housing to form a first exhaust gas distribution cavity and a first air distribution cavity, wherein the first enclosure member is provided with a first exhaust gas inlet and a first air inlet, both of which are connected to the first exhaust gas distribution cavity, and both of which are connected to the first air distribution cavity; and / or, The second enclosure is located outside the second housing and forms a second exhaust gas distribution cavity with the second housing. The second enclosure is provided with a second exhaust gas interface. Both the second exhaust gas interface and the second exhaust gas inlet are connected to the second exhaust gas distribution cavity. The second exhaust gas interface is provided with a first fuel interface, which is connected to the second exhaust gas distribution chamber through the second exhaust gas interface, and / or the second enclosure is provided with a first fuel interface, which is connected to the second exhaust gas distribution chamber.
5. The energy-saving device for large-scale intermittent VOC gas combustion according to claim 3, characterized in that, The first air inlet is positioned above the first exhaust gas inlet along the height direction.
6. The energy-saving device for large-scale intermittent VOC gas combustion according to claim 5, characterized in that, The energy-saving device suitable for large intermittent VOC gas combustion also includes a burner, at least a portion of which is disposed within the first housing; In the height direction, the first exhaust gas inlet is located near the bottom of the burner, the first air inlet is located near the middle of the burner, and the second exhaust gas inlet and the first fuel inlet are both located near the top of the burner.
7. The energy-saving device for large-scale intermittent VOC gas combustion according to claim 1, characterized in that, The number of the first exhaust gas inlets is one or more, and at least one of the first exhaust gas inlets is arranged at circumferential intervals along the first housing; and / or, The number of the first air inlets is one or more, and at least one of the first air inlets is arranged at circumferential intervals along the first housing; and / or, The number of the second exhaust gas inlets is one or more, and at least one of the second exhaust gas inlets is arranged at circumferential intervals along the second housing.
8. The energy-saving device for large-scale intermittent VOC gas combustion according to claim 1, characterized in that, At least one of the central axes of the first exhaust gas inlet and the first air inlet does not intersect with the central axis of the first housing; and / or, The central axis of the second exhaust gas inlet does not intersect with the central axis of the second housing.
9. The energy-saving device for large-scale intermittent VOC gas combustion according to claim 1, characterized in that, The energy-saving device suitable for large-scale intermittent VOC gas combustion also includes: Multiple first baffles are spaced apart and disposed on the inner wall surface of the first cavity; and / or, Multiple second flow deflectors are spaced apart on the inner wall surface of the second cavity.
10. The energy-saving device for large-scale intermittent VOC gas combustion according to claim 1, characterized in that, The energy-saving device suitable for large intermittent VOC gas combustion further includes a third housing, which is disposed along the height direction on the side of the second housing away from the first housing. The third housing is provided with a third cavity and a second air inlet communicating with the third cavity. The third cavity is connected to the second cavity, and the second air inlet is configured to supply air into the third cavity. Wherein, the number of the second air inlets is one or more, and at least one of the second air inlets is arranged at circumferential intervals along the third housing; and / or, The central axis of the second air inlet does not intersect the central axis of the third housing; and / or, The energy-saving device suitable for large-intermittent VOC gas combustion also includes multiple third flow-disrupting elements, which are spaced apart on the inner wall surface of the third cavity.
11. The energy-saving device for large-scale intermittent VOC gas combustion according to claim 10, characterized in that, The energy-saving device suitable for large intermittent VOC gas combustion also includes a third enclosure component. The third enclosure component is located outside the third housing and forms a second air distribution cavity with the third housing. The third enclosure component is provided with a second air interface, and both the second air interface and the second air inlet are connected to the second air distribution cavity.
12. A processing method, characterized in that, The processing method, applied to the energy-saving device for large-scale intermittent VOC gas combustion as described in any one of claims 1 to 11, comprises: When the flow rate of the exhaust gas is less than or equal to the first preset value, the exhaust gas enters the first cavity through the first exhaust gas inlet; When the flow rate of the exhaust gas exceeds the first preset value, the exhaust gas enters the second cavity through the second exhaust gas inlet.
13. The processing method according to claim 12, characterized in that, The second housing is also provided with a first fuel inlet. When the flow rate of the exhaust gas is greater than a first preset value and the concentration of combustibles in the exhaust gas is lower than a second preset value, fuel is delivered into the second cavity through the first fuel inlet.
14. The processing method according to claim 12, characterized in that, Air is supplied into the first cavity through the first air inlet to mix the exhaust gas and air within the first cavity; and / or, The energy-saving device suitable for large intermittent VOC gas combustion also includes a third housing, which is provided with a third cavity and a second air inlet communicating with the third cavity. Air is supplied to the third cavity through the second air inlet to mix with unburned components generated in the first cavity and / or the second cavity and to undergo a combustion reaction.