Heat self-balancing catalytic combustion device

Abstract

The utility model provides a heat self-balancing catalytic combustion device. The catalytic combustion device internally comprises a disturbance heat dissipation heat conduction part and a catalytic bed layer. The disturbance heat dissipation and heat conduction part and the catalytic bed layer are sequentially arranged in the airflow direction; the catalytic bed layer is used for arranging a catalyst; the disturbance heat dissipation and heat conduction component comprises a heat conduction center shaft perpendicular to the air flow entering direction and at least one disturbance piece which is arranged on the heat conduction center shaft and can rotate. The catalytic combustion device further comprises a heat transmission part connected with the catalytic bed layer and the disturbance heat dissipation and heat conduction part. According to the utility model, the heat of the catalytic bed layer is transmitted to the disturbance heat dissipation and heat conduction component through the heat transmission component, and the disturbance heat dissipation and heat conduction component rotates to transmit the received heat to the waste gas at the inlet for preheating under the condition of airflow conveying, so that not only can heat conduction and heat dissipation be carried out quickly to avoid a temperature runaway phenomenon, but also heat recovery can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of catalytic combustion, in particular to a catalytic combustion device with self-heat balance. Background Technique

[0002] The process routes of VOC treatment technologies are mainly adsorption method and combustion method. The combustion method is a thorough purification method and also a classic process, including direct combustion and catalytic combustion. Among them, catalytic combustion has great technical advantages due to its low ignition point and low energy consumption. The honeycomb carriers commonly used in existing catalytic combustion equipment not only have catalytic performance but also have good heat storage capacity. As the reaction proceeds, the heat released by the catalytic combustion reaction accumulates in large quantities in the local bed layer, causing the temperature of this part of the bed layer to rise rapidly, resulting in the phenomenon of "temperature runaway" in the catalytic bed. Or when the concentration at the inlet of the catalytic bed is too high, due to the large amount of heat released instantaneously by the catalytic reaction and the heat storage effect of the catalyst accumulating in the catalytic bed, the temperature gets out of control. The active components of the catalyst have certain requirements for the use temperature. When the temperature is too high, the catalyst will deteriorate and the catalytic activity will decline, which will seriously affect the service life of the catalytic bed during long-term operation. Moreover, the heat of catalytic combustion is not recovered, resulting in a waste of heat resources.

[0003] Currently, there have been studies related to catalytic combustion devices and heat recovery, such as:

[0004] CN105650651A discloses a purification treatment method for high-concentration organic waste gas. This technology enables the organic matter in the waste gas to undergo partial catalytic combustion reactions in each bed layer by means of segmented oxygen supply, controls the waste gas temperature at the outlet of each bed layer, and connects the organic waste gas outlet of the previous catalyst bed layer to the organic waste gas inlet of the subsequent bed layer through a heat recovery device, thereby recovering the reaction heat released by catalytic combustion. However, in actual production, it is difficult to achieve precise and stable oxygen supply by this method, resulting in insufficient oxygen supply, making it difficult for catalytic combustion to continue, or excessive oxygen supply, causing violent catalytic combustion and easy temperature runaway in the bed layer.

[0005] CN107504506B discloses a catalytic combustion purification process and its device. This process and device first mix organic waste gas with air and / or oxygen, and can flexibly adjust the mixing ratio between the two according to the requirements of the subsequent catalytic combustion temperature, not only ensuring that the concentration of organic waste gas in the mixed gas is within the lower explosion limit, but more importantly, regulating the subsequent catalytic combustion temperature and preventing the phenomenon of temperature runaway in the catalytic combustion section; then the mixed gas is divided into two parts, one part undergoes catalytic combustion, and the remaining part exchanges heat with the mixed gas at the outlet of each catalytic combustion section.

[0006] However, the following problems mainly exist in this method: ① This solution adopts a hierarchical indexing layout, and it is necessary to adjust the catalyst filling amount in different sections to ensure the stable progress of the catalytic combustion reaction, which is not convenient to implement in practice; ② This solution uses heat exchange to displace the temperature in the bed layer. According to the heat exchange requirements of the gas flow in different parts, it is necessary to set up multiple heat exchange devices, and some even need to set up heat exchange surfaces with variable heat exchange areas, which increases the design difficulty and implementation cost; ③ During the entire catalytic combustion process, heat exchange needs to be carried out multiple times, and heat loss will occur each time, ultimately resulting in the inability to maximize the effective utilization of the system energy.

[0007] Therefore, it is necessary to develop a catalytic combustion device that can simultaneously achieve heat recovery and prevent temperature runaway to solve the above technical problems. Utility Model Content

[0008] To solve the above technical problems, the present utility model provides a catalytic combustion device with self-balanced heat, which uses a heat transfer component to transfer the heat of the catalytic bed layer to a disturbance heat dissipation and heat conduction component, and uses the driving force of the gas flow to drive the disturbance heat dissipation and heat conduction component to rotate, thereby driving the gas flow to be disturbed, promoting the heat received by the disturbance heat dissipation and heat conduction component to exchange heat with the inlet gas flow, so as to achieve efficient heat transfer and exchange, not only can avoid temperature runaway of the catalytic bed layer, but also can improve the utilization rate of the heat generated by the catalytic bed layer, and realize the self-balanced heat of the catalytic combustion device.

[0009] To achieve this purpose, the present utility model adopts the following technical solutions:

[0010] The present utility model provides a catalytic combustion device with self-balanced heat, and the catalytic combustion device includes: a disturbance heat dissipation and heat conduction component and a catalytic bed layer;

[0011] The disturbance heat dissipation and heat conduction component and the catalytic bed layer are arranged in sequence along the gas flow direction; the catalytic bed layer is used to set catalysts;

[0012] The disturbance heat dissipation and heat conduction component includes a heat conduction central axis perpendicular to the gas flow inlet direction, and at least one disturbance piece arranged on the heat conduction central axis and capable of rotating;

[0013] The catalytic combustion device further includes a heat transfer component connecting the catalytic bed layer and the disturbance heat dissipation and heat conduction component.

[0014] It should be noted that the present utility model mainly aims at the problems of "temperature runaway" or "overtemperature" often occurring during the use of catalytic combustion devices, which lead to catalyst deactivation and performance degradation. To solve the above problems, the catalytic combustion device with self-balanced heat provided by the present utility model has the following advantages: Firstly, compared with the traditional rough adjustment method of detecting temperature feedback by a temperature detector and adjusting the air volume of the heater and the catalytic combustion device, in the catalytic combustion device of the present utility model, through its own temperature difference, the heat transfer component can directly move the heat at the end of the catalytic combustion device forward to supply the waste gas at the inlet, thus naturally reducing the heating energy consumption of the front-end heater, and the control is more gentle and effective, avoiding large fluctuations in the inlet air temperature; Secondly, compared with the design concept of traditional catalytic combustion devices with hierarchical design and hierarchical catalysis, the present utility model uses a heat transfer component to make the entire catalytic combustion device into a whole with uniform heat, canceling the heat preservation, sealing, etc. added due to the need for hierarchical design, simplifying the design, production difficulty and cost of the entire catalytic combustion device, and at the same time not affecting the use effect of the entire catalytic combustion device. Furthermore, the present utility model is provided with a function of directly moving and recycling the heat forward, with high heat utilization rate, and at the same time can achieve precise temperature control, and the heat conduction and heat exchange processes of the entire device are automatically completed inside the device using the temperature difference, without the need for additional heat preservation and sealing measures, realizing the heat self-balancing of the entire catalytic combustion device.

[0015] In the present utility model, a unique design of a disturbance heat dissipation and heat conduction component is adopted, and the heat transfer component is connected to the disturbance heat dissipation and heat conduction component at the inlet. The heat transfer component can transfer the heat in the catalytic combustion device to the disturbance heat dissipation and heat conduction component at the inlet according to the temperature difference as needed, and can directly transfer the excess temperature in the bed layer to the inlet, realizing the direct recycling of heat in the catalytic combustion device, reducing the energy consumption of inlet preheating, and realizing the forward utilization of the heat at the end; moreover, the disturbance heat dissipation and heat conduction component of the present utility model can rotate under the action of the air flow driving force, thereby realizing the disturbance of the air flow. This can not only improve the heat dissipation speed of the heat received on the disturbance heat dissipation and heat conduction component, but also convert the inlet air flow into a disturbed state to achieve the effect of air flow distribution uniformity, ensuring the uniformity of the air flow entering the catalytic bed.

[0016] Preferably, the disturbance member is rotatably fixed on the heat conduction central axis through a limiting member, and the limiting member is used to prevent the disturbance member from moving axially.

[0017] And / or, the disturbance member includes a heat dissipation tooth-shaped structure, and at least two tooth pieces are arranged in central symmetry on the heat dissipation tooth-shaped structure.

[0018] The heat dissipation tooth-shaped structure of the utility model is integrally formed of a heat-conducting material, with an oval axis in the center, a polygonal tooth-shaped structure on the front, a certain thickness on the side, and each tooth piece being an arc-shaped structure with rough textures on the arc-shaped structure.

[0019] At least two heat dissipation tooth-shaped structures are arranged orderly on the heat-conducting central axis, and a limiting component is arranged on the axis. When the air flow passes through and disturbs the heat-conducting component, it impacts on the heat dissipation tooth-shaped structure, causing the heat dissipation tooth-shaped structure to rotate. Due to the action of the limiting component and the oval axis, the heat dissipation tooth-shaped structure rotates eccentrically around the heat-conducting central axis. During the eccentric rotation process, the heat-conducting central axis contacts the heat dissipation tooth-shaped structure, transferring the heat on the axis to the heat dissipation tooth-shaped structure. Due to the rotational movement of the heat dissipation tooth-shaped structure, the turbulence of the air around the heat-conducting component is increased, which is more conducive to the uniform distribution of the air flow, having the function of an air flow distributor, realizing the uniform distribution of the air flow, preventing the uneven air flow from entering the catalytic bed, resulting in phenomena such as insufficient utilization of the catalytic bed and concentrated combustion. At the same time, the contact between the air and the heat dissipation tooth-shaped structure is further increased. Coupled with each arc-shaped tooth-shaped structure and the rough textures on the arc surface, the contact area between the air flow and the heat dissipation tooth-shaped structure is further increased, enabling the heat transferred to the heat dissipation tooth-shaped structure to be quickly dissipated.

[0020] Preferably, when the number of the disturbing components is at least three, in the direction from the middle of the heat-conducting central axis along the axial direction towards both ends, the outer diameter of the heat dissipation tooth-shaped structure gradually increases.

[0021] And / or, when the number of the disturbing components is at least three, the ratio of the outer diameter of the largest heat dissipation tooth-shaped structure to the outer diameter of the smallest heat dissipation tooth-shaped structure is (1 - 2):1, for example, it can be 1:1, 1.1:1, 1.2:1, 1.3:1, 1.4:1, 1.5:1, 1.6:1, 1.7:1, 1.8:1, 1.9:1 or 2.0:1, etc.

[0022] The rotation direction of the heat dissipation tooth-shaped structure is centrosymmetric, which is conducive to the air flow swirling to both sides. The size of the tooth-shaped structure of the heat dissipation tooth-shaped structure gradually increases from the center to both sides in the direction of the heat-conducting central axis, and the spacing gradually increases from the center to both sides. The outer diameter of the heat dissipation tooth-shaped structures on both sides is 1 - 2 times the outer diameter of the heat dissipation tooth-shaped structure in the middle. When the air flow passes through the heat dissipation tooth-shaped structure, the heat dissipation tooth-shaped structures on both sides contact the air flow first and preferentially divert it to both sides. At the same time, the tooth piece area on both sides is larger than the tooth piece area in the middle, resulting in sufficient air flow passing through both sides, improving the problem of large air flow in the middle and small air flow on both sides caused by the inlet horn shape, and playing a role in evenly distributing the air flow to a certain extent.

[0023] Preferably, the tooth pieces are inclined on the heat dissipation tooth-shaped structure.

[0024] Preferably, when the number of the disturbing members is at least three, in the direction pointing from the middle of the heat conduction central axis to both ends along the axial direction, the inclination directions of the tooth pieces in the disturbing members are opposite.

[0025] In the utility model, the tooth pieces on both sides are arranged with opposite inclination directions, so that the disturbing members can rotate in opposite directions under the action of air flow, thereby realizing the function of diverting to both sides, and further avoiding the phenomenon of temperature runaway caused by the concentration of air flow in the middle.

[0026] Preferably, the heat transfer component includes at least two first plate members arranged oppositely; a cavity is formed inside the first plate member; both the catalytic bed layer and the disturbing heat dissipation and heat conduction component are arranged in the cavity, and the disturbing heat dissipation and heat conduction component is connected to the first plate member.

[0027] Preferably, the material of the heat transfer component is a heat-conducting material.

[0028] Preferably, the heat transfer component further includes a second plate member arranged in the cavity formed by the first plate member, and the second plate member divides the catalytic bed layer into at least two regions.

[0029] Preferably, the second plate member includes a first sub-plate member and a second sub-plate member, the first sub-plate member is connected to the first plate members arranged on at least two sides, at least one second sub-plate member is arranged on each first sub-plate member, and the second sub-plate member is perpendicular to the first sub-plate member and extends to the outside of the first sub-plate member.

[0030] The first sub-plate member, the second sub-plate member and the first plate member together form at least one tic-tac-toe structure; the internal area of each tic-tac-toe structure is used to arrange the catalyst.

[0031] Further, in order to improve the heat dissipation and heat distribution effects, the first sub-plate member, the second sub-plate member and the first plate member are all in close contact with the catalyst. The catalyst and the heat transfer component are closely attached, so that the heat generated on the catalytic bed layer can be quickly conducted to the heat transfer component on all four sides, avoiding the generation of local temperature runaway phenomenon.

[0032] In the utility model, the catalysts in the first sub-plate member, the second sub-plate member and the first plate member are distributed alternately, ensuring that the heat generated by the catalyst in each region can be directly conducted to the heat transfer component nearby, and using the temperature difference between different regions of the catalytic bed layer and the heat transfer component to quickly distribute the heat, realizing the temperature distribution in the air flow direction of the entire catalytic bed, ensuring the purification effect, and at the same time preventing the generation of local temperature runaway problems.

[0033] Preferably, when the catalyst is a monolithic catalyst, the distance between adjacent first sub-plate members is the same as one dimension of the monolithic catalyst, so as to ensure the close contact between the first sub-plate member and the catalyst.

[0034] Preferably, the ratio of the distance by which the second sub-plate extends beyond the first sub-plate to the distance between the two second sub-plates is 0.5 to 1:1. For example, it can be 0.5:1, 0.55:1, 0.6:1, 0.65:1, 0.7:1, 0.75:1, 0.8:1, 0.85:1, 0.9:1, 0.95:1 or 1:1, etc.

[0035] Preferably, the catalytic combustion device further includes a heat insulation layer disposed outside the first plate, and there is a gap between the heat insulation layer and the first plate, and the gap is an air chamber.

[0036] A heat exchange fluid inlet and a heat exchange fluid outlet are respectively provided at both ends of the air chamber.

[0037] In the present utility model, the air chamber can selectively realize the functions of heat exchange or heat insulation according to the surplus degree of heat of the catalytic combustion device. The function switching is simple and does not affect the overall structure of the entire catalytic combustion device.

[0038] Specifically, when the temperature of the catalytic bed is severely overheated and the catalytic combustion device cannot digest it by itself, in addition to transferring as much heat as possible to the waste gas through the disturbance heat dissipation and heat conduction components (closing the heating equipment that originally needed to preheat the waste gas), at the same time, open the air valves in the two side air chambers, introduce cold air, and conduct the heat in the catalytic bed to the two side heat dissipation devices through the heat transfer components, and the heat is quickly carried out by the air flowing in the air chamber to maintain the catalytic bed layer within a suitable operating temperature range. When the temperature of the catalytic bed layer is within the operating range, the catalytic combustion device heat is digested by itself through the disturbance heat dissipation and heat conduction components and the heat transfer components. At the same time, close the corresponding air valves on both sides of the air chamber, and there is no air flow in the air chamber, forming a gas heat insulation layer to further reduce the heat loss of the equipment.

[0039] Preferably, heat dissipation devices are provided in the air chamber. Further, the heat dissipation devices are connected to the first plate.

[0040] In the present utility model, air chambers are provided on the left and right sides of the catalytic combustion device. There are heat dissipation devices in the air chambers, and the heat dissipation devices are connected to the first plate. When the heat energy in the catalytic bed layer is appropriate, the air chambers are in a closed state to create a gas heat insulation layer for the catalytic combustion device; when the energy in the catalytic bed layer is excessive, cold air can be introduced into the air chambers, and the heat in the catalytic combustion device is quickly transferred to the air by the first plate and the heat dissipation devices and carried out of the catalytic combustion device, so as to maintain the heat of the catalytic combustion device within a controllable range.

[0041] Preferably, the heat dissipation devices include heat dissipation fins.

[0042] Preferably, holes are provided on the heat dissipation device. Multiple small holes are provided on the heat sink of the present utility model to facilitate the passage of air flow.

[0043] Preferably, the heat exchange fluid inlet is provided at the bottom of the air chamber, and the heat exchange fluid outlet is provided at the top of the air chamber;

[0044] Preferably, a first air valve is provided at the heat exchange fluid inlet, and a second air valve is provided at the heat exchange fluid outlet.

[0045] Preferably, the catalytic combustion device further includes an exhaust gas inlet and an exhaust gas outlet arranged in sequence along the exhaust gas conveying direction. The disturbance heat dissipation and heat conduction component and the catalytic bed layer are both arranged between the exhaust gas inlet and the exhaust gas outlet;

[0046] The cross-sectional area of the exhaust gas inlet gradually increases along the exhaust gas conveying direction.

[0047] Preferably, the cross-sectional area of the exhaust gas outlet gradually decreases along the exhaust gas conveying direction.

[0048] Preferably, the exhaust gas inlet is provided at the top of the catalytic combustion device, and the exhaust gas outlet is provided at the bottom of the catalytic combustion device. The catalytic combustion device of the present utility model is preferably vertically distributed.

[0049] The present utility model has no special restrictions on the above heat-conducting materials, and any heat-conducting materials well-known to those skilled in the art can be used, and can also be adjusted according to actual situations. For example, it can be metal or metal alloy materials such as copper, aluminum, and iron, or heat-conducting composite materials containing metals, such as heat-conducting high molecular plates, or self-heat-conducting materials such as graphene plates.

[0050] The present utility model also provides an operation method of the catalytic combustion device, and the operation method includes:

[0051] After the exhaust gas enters the catalytic combustion device, it passes through the disturbance heat dissipation and heat conduction component. The disturbance heat dissipation and heat conduction component transfers the heat received from the heat transfer component to the exhaust gas for preheating. At the same time, the disturbance heat dissipation and heat conduction component rotates under the exhaust gas conveying power to accelerate heat exchange and heat dissipation; then the exhaust gas is further conveyed to the catalytic bed layer for catalytic combustion, and the gas after catalytic combustion is discharged from the catalytic combustion device.

[0052] Preferably, when the temperature of the catalytic combustion is moderate, no heat exchange fluid is introduced into the air chamber; or, when the temperature of the catalytic combustion is on the high side, heat exchange fluid is introduced into the air chamber, and the cold quantity of the heat exchange fluid is transferred to the catalytic bed layer through the heat transfer component to cool the catalytic bed layer and reduce the temperature of the entire catalytic combustion device;

[0053] Preferably, when the waste gas contacts the disturbance heat dissipation and heat conduction component, the airflows on both sides first contact the disturbance members with large tooth pieces on both sides. At this time, the disturbance members on both sides rotate first and direct the airflow to both sides. Then the airflow contacts the small tooth pieces in the middle and drives the disturbance members in the middle to rotate, thus achieving the effect of uniform airflow distribution.

[0054] Preferably, the rotation directions of the disturbance members on both sides are opposite. Due to the different angles of airflow transportation, the disturbance members with different arc orientations can be driven to rotate in different directions.

[0055] The present utility model has no special requirements for the composition of the waste gas and can adapt to any waste gas composition that needs catalytic combustion treatment and is well-known to those skilled in the art. Preferably, it is VOCs.

[0056] It should be noted that the catalyst of the present utility model can be a monolithic catalyst or a bulk catalyst. Preferably, it is a monolithic catalyst; among them, the monolithic catalyst includes a honeycomb catalyst.

[0057] The present utility model has no special restrictions on the specific composition of the above catalyst. Any catalyst composition that can be used for catalytic combustion and is well-known to those skilled in the art can be adopted, and it can also be adjusted according to the actual process.

[0058] Compared with the prior art, the present utility model has at least the following beneficial effects:

[0059] (1) The catalytic combustion device with heat self-balancing provided by the present utility model realizes the transfer of heat inside the catalytic bed layer and preheats the incoming waste gas through the setting of the disturbance heat dissipation and heat conduction component and the heat transfer component. The heat transfer component transfers the heat generated by the catalytic bed layer to the first plate in time through the setting of the second plate and transfers the heat on the first plate to the disturbance heat dissipation and heat conduction component, thus achieving the full utilization of heat.

[0060] (2) In the catalytic combustion device with heat self-balancing provided by the present utility model, the disturbance heat dissipation and heat conduction component not only has the function of heat conduction, but also can rotate under the action of airflow, thus significantly improving the heat dissipation effect and having the function of uniform airflow distribution at the same time.

[0061] (3) The catalytic combustion device with heat self-balancing provided by the present utility model preferably sets an air chamber on the outside. When the heat inside the catalytic bed layer is difficult to consume, a heat exchange fluid (i.e., cold heat exchange air) can be introduced to further cool the catalytic bed layer, thus achieving the effect of effective temperature control; and when the air chamber can consume heat inside the catalytic combustion, there is no need to introduce a heat exchange fluid, which can play the role of air layer heat preservation, thereby maintaining the temperature inside the catalytic bed layer within a reasonable range.

[0062] (4) The catalytic combustion device with heat self - balance provided by the present utility model preferably has heat dissipation components arranged in the air chamber, which can further improve the heat exchange effect in the air chamber;

[0063] (5) The operation method of the catalytic combustion device with heat self - balance provided by the present utility model can avoid the phenomenon of temperature runaway during the catalytic combustion process, effectively utilize the heat generated by the catalytic combustion, and can be adapted to monolithic catalysts and bulk catalysts, with broad application prospects. Description of the Drawings

[0064] Figure 1 is the front view of the catalytic combustion device with heat self - balance provided by Embodiment 1 of the present utility model.

[0065] Figure 2 is the side view of the catalytic combustion device with heat self - balance provided by Embodiment 1 of the present utility model.

[0066] Figure 3 is the top view of the catalytic combustion device with heat self - balance provided by Embodiment 1 of the present utility model.

[0067] Figure 4 is the schematic diagram of the heat transfer component in the catalytic combustion device with heat self - balance provided by Embodiment 1 of the present utility model.

[0068] Figure 5 is the schematic diagram of the disturbance heat dissipation and heat conduction component in the catalytic combustion device with heat self - balance provided by Embodiment 1 of the present utility model.

[0069] Figure 6 is the schematic diagram of the disturbance part in the disturbance heat dissipation and heat conduction component in the catalytic combustion device with heat self - balance provided by Embodiment 1 of the present utility model.

[0070] Figure 7 is the schematic diagram of the heat sink in the catalytic combustion device with heat self - balance provided by Embodiment 1 of the present utility model.

[0071] Figure 8 is the schematic diagram of the rotation direction of the disturbance part in the disturbance heat dissipation and heat conduction component in Embodiment 1 of the present utility model.

[0072] In the figure: 1. Exhaust gas inlet; 2. Exhaust gas outlet; 3. Disturbance heat dissipation and heat conduction component; 3 - 1. Heat conduction central axis; 3 - 2. Heat dissipation tooth - like structure; 3 - 3. Limiting component; 4. Catalytic bed layer; 5. Heat transfer component; 5 - 1. First plate member; 5 - 2. First sub - plate member; 5 - 3. Second sub - plate member; 6. Heat dissipation component; 7 - 1. First air chamber; 7 - 2. Second air chamber; 8 - 1. First air valve; 8 - 2. Second air valve; 9. Thermal insulation layer. Detailed Embodiments

[0073] For the convenience of understanding the present utility model, the following are examples of the present utility model. Those skilled in the art should understand that the said examples are only for helping to understand the present utility model and should not be regarded as specific limitations on the present utility model.

[0074] It should be understood that in the description of the present utility model, the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0075] It should be noted that in the description of the present utility model, unless otherwise clearly defined and limited, the terms "set", "connected", "connected to" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific situations.

[0076] Those skilled in the art should understand that the present utility model necessarily includes the necessary pipelines, conventional valves and general pump equipment for realizing the complete process. However, the above contents do not belong to the main inventive points of the present utility model. Those skilled in the art can add and arrange them by themselves based on the process flow and equipment structure selection. The present utility model has no special requirements and specific limitations on this.

[0077] Embodiment 1

[0078] This embodiment provides a catalytic combustion device with heat self - balance. Refer to Figures 1 to 3 , in the catalytic combustion device with heat self - balance, it includes: a disturbance heat - dissipation and heat - conduction component 3 and a catalytic bed layer 4; the catalytic combustion device further includes a heat transfer component 5 connecting the catalytic bed layer 4 and the disturbance heat - dissipation and heat - conduction component 3. The disturbance heat - dissipation and heat - conduction component 3 and the catalytic bed layer 4 are arranged in sequence along the gas flow direction; the catalytic bed layer 4 is used for arranging catalysts.

[0079] Refer toFigures 5 to 6 The disturbance heat dissipation and heat conduction component 3 includes a heat conduction central axis 3-1 perpendicular to the air flow inlet direction, and at least one disturbing member disposed on the heat conduction central axis 3-1 and capable of rotating; the disturbing member is rotatably fixed on the heat conduction central axis 3-1 through a limiting member 3-3, and the limiting member 3-3 is used to prevent the disturbing member from moving axially. The disturbing member includes a heat dissipation tooth-shaped structure 3-2, and the heat dissipation tooth-shaped structure 3-2 has at least two tooth pieces arranged centrally symmetrically. Each tooth piece is an arc-shaped structure, and the arc-shaped structure has a rough texture. The number of the disturbing members is 7. From the middle of the heat conduction central axis 3-1 along the axial direction towards both ends, the outer diameter of the heat dissipation tooth-shaped structure 3-2 gradually increases. The ratio of the outer diameter of the largest heat dissipation tooth-shaped structure 3-2 to the outer diameter of the smallest heat dissipation tooth-shaped structure 3-2 is 1.8:1. The tooth pieces are inclinedly arranged on the heat dissipation tooth-shaped structure 3-2. From the middle of the heat conduction central axis 3-1 along the axial direction towards both ends, the inclination directions of the tooth pieces in the disturbing members are opposite.

[0080] See Figure 4 The heat transfer component 5 includes at least two relatively arranged first plate members 5-1; a cavity is formed inside the first plate member 5-1; the catalytic bed layer 4 and the disturbance heat dissipation and heat conduction component 3 are both arranged in the cavity, and the disturbance heat dissipation and heat conduction component 3 is connected to the first plate member 5-1. The material of the heat transfer component 5 is a heat-conducting material. The heat transfer component 5 further includes a second plate member arranged in the cavity formed by the first plate member 5-1, and the second plate member divides the catalytic bed layer 4 into at least two regions. The second plate member includes a first sub-plate member 5-2 and a second sub-plate member 5-3. The first sub-plate member 5-2 is connected to the first plate members 5-1 arranged on at least two sides. At least one second sub-plate member 5-3 is arranged on each first sub-plate member 5-2, and the second sub-plate member 5-3 is perpendicular to the first sub-plate member 5-2 and extends to the outside of the first sub-plate member 5-2. The first sub-plate member 5-2, the second sub-plate member 5-3 and the first plate member 5-1 together form at least one tic-tac-toe structure; the internal area of each tic-tac-toe structure is used to arrange the catalyst. Further, in order to improve the heat dissipation and heat distribution effects, the first sub-plate member 5-2, the second sub-plate member 5-3 and the first plate member 5-1 are all in close contact with the catalyst. The catalyst and the heat transfer component 5 are closely attached, so that the heat generated on the catalytic bed layer 4 can be quickly conducted to the heat transfer component 5 on all four sides, avoiding the occurrence of local over-temperature phenomenon. The ratio of the distance that the second sub-plate member 5-3 extends beyond the first sub-plate member 5-2 to the distance between two second sub-plate members 5-3 is 0.5:1.

[0081] The catalytic combustion device further includes a heat insulation layer 9 disposed outside the first plate member 5-1, and a gap is provided between the heat insulation layer 9 and the first plate member 5-1. The gap is an air chamber. An inlet for heat exchange fluid (see A1 in the figure) and an outlet for heat exchange fluid (see A2 in the figure) are respectively provided at both ends of the air chamber.

[0082] A heat dissipation device 6 is disposed in the air chamber. See Figure 7 , the heat dissipation device 6 is connected to the first plate member 5-1. The heat dissipation device 6 includes heat dissipation fins. The heat dissipation device 6 is provided with holes. Multiple small holes are provided on the heat dissipation fins of the present utility model to facilitate the passage of air flow. The inlet for heat exchange fluid is provided at the bottom of the air chamber, and the outlet for heat exchange fluid is provided at the top of the air chamber; a first air valve 8-1 is provided at the inlet for heat exchange fluid, and a second air valve 8-2 is provided at the outlet for heat exchange fluid.

[0083] The catalytic combustion device further includes an exhaust gas inlet 1 and an exhaust gas outlet 2 which are sequentially arranged along the exhaust gas conveying direction. The disturbance heat dissipation and heat conduction component 3 and the catalytic bed layer 4 are both disposed between the exhaust gas inlet 1 and the exhaust gas outlet 2; the cross-sectional area of the exhaust gas inlet 1 gradually increases along the exhaust gas conveying direction. The cross-sectional area of the exhaust gas outlet 2 gradually decreases along the exhaust gas conveying direction. The exhaust gas inlet 1 is provided at the top of the catalytic combustion device, and the exhaust gas outlet 2 is provided at the bottom of the catalytic combustion device.

[0084] The present utility model also provides an operation method of the catalytic combustion device. The operation method includes:

[0085] After the exhaust gas enters the catalytic combustion device, it passes through the disturbance heat dissipation and heat conduction component. The disturbance heat dissipation and heat conduction component transfers the heat received from the self-heat transfer component to the exhaust gas for preheating. At the same time, the disturbance heat dissipation and heat conduction component rotates under the exhaust gas conveying power to accelerate heat exchange and heat dissipation; then the exhaust gas is further conveyed to the catalytic bed layer for catalytic combustion, and the gas after catalytic combustion is discharged from the catalytic combustion device.

[0086] When the temperature of the catalytic combustion is moderate, no heat exchange fluid is introduced into the air chamber; or, when the temperature of the catalytic combustion is on the high side, heat exchange fluid is introduced into the air chamber. The cold quantity of the heat exchange fluid is transferred to the catalytic bed layer through the heat transfer component to cool the catalytic bed layer and reduce the temperature of the entire catalytic combustion device;

[0087] When the exhaust gas contacts the disturbance heat dissipation and heat conduction component, the air flows on both sides first contact the disturbance members with large tooth pieces on both sides. At this time, the disturbance members on both sides rotate first and direct the air flow direction to both sides, and then the air flow contacts the small tooth pieces in the middle and drives the disturbance members in the middle to rotate, thereby achieving the effect of uniform air flow distribution. Moreover, the rotation directions of the disturbance members on both sides are opposite (see Figure 8) Due to the different angles of pneumatic conveying, it is possible to drive the disturbing members with different arc orientations to rotate in different directions.

[0088] Embodiment 2

[0089] This embodiment provides a catalytic combustion device with heat self - balance. The catalytic combustion device with heat self - balance is the same as that in Embodiment 1 except that the number of disturbing members is 5, and the ratio of the outer diameter of the largest heat - dissipating tooth - shaped structure to the outer diameter of the smallest heat - dissipating tooth - shaped structure is 1.5:1.

[0090] Embodiment 3

[0091] This embodiment provides a catalytic combustion device with heat self - balance. The catalytic combustion device is the same as that in Embodiment 1 except that along the axial direction from the middle of the self - heat - conducting central axis towards both ends, the outer diameters of the heat - dissipating tooth - shaped structures are the same, and the rest are the same as those in Embodiment 1, so they will not be elaborated here.

[0092] Embodiment 4

[0093] This embodiment provides a catalytic combustion device with heat self - balance. The catalytic combustion device is the same as that in Embodiment 1 except that along the axial direction from the middle of the self - heat - conducting central axis towards both ends, the inclination directions of the tooth pieces in the disturbing members are the same, and the rest are the same as those in Embodiment 1, so they will not be elaborated here.

[0094] Embodiment 5

[0095] This embodiment provides a catalytic combustion device with heat self - balance. The catalytic combustion device is the same as that in Embodiment 1 except that no heat - dissipating device is provided in the gas chamber, and the rest are the same as those in Embodiment 1, so they will not be elaborated here.

[0096] Embodiment 6

[0097] This embodiment provides a catalytic combustion device with heat self - balance. The catalytic combustion device is the same as that in Embodiment 1 except that no second sub - plate member is provided, and only the first plate member and the first sub - plate member are provided, and the rest are the same as those in Embodiment 1, so they will not be elaborated here.

[0098] Comparative Example 1

[0099] This comparative example provides a catalytic combustion device. The catalytic combustion device is the same as that in Embodiment 1 except that no disturbing heat - dissipating and heat - conducting component is provided, and the rest are the same as those in Embodiment 1, so they will not be elaborated here.

[0100] Comparative Example 2

[0101] This comparative example provides a catalytic combustion device. The catalytic combustion device is the same as that in Embodiment 1 except that the heat transfer component only has the second plate member, and no first plate member is provided to connect the catalytic bed layer and the disturbing heat - dissipating and heat - conducting component, and the rest are the same as those in Embodiment 1, so they will not be elaborated here.

[0102] The test method of the present utility model does not limit the operation method of the catalytic combustion device in the present utility model. The catalytic combustion device of the present utility model can be applied to different waste gases and different operation methods. The following is a test conducted to demonstrate the advantages of the catalytic combustion device of the present utility model.

[0103] Device temperature stability test in the above embodiments and comparative examples: After the temperature in the core area is stable, within the test time (interval not less than 1 hour), the difference between the highest and lowest temperatures at any point in the working space is within ±10°C. Calculation method: ΔT = ±(T max -T min ) / 2; where ΔT represents the temperature fluctuation degree, °C; T max represents the measured highest temperature value of the equipment indication point within 30 minutes, °C; T min represents the measured lowest temperature value of the equipment indication point within 30 minutes, °C.

[0104] The test results of the above embodiments and comparative examples are shown in Table 1.

[0105] Table 1

[0106] Temperature fluctuation ΔT (°C) Test phenomenon Example 1 5～7 Temperature uniformity Example 2 6～8 Temperature uniformity Example 3 9～19 Relatively uniform temperature Example 4 10～20 Relatively uniform temperature Example 5 9～16 Temperature uniformity Example 6 7～18 Relatively uniform temperature Comparative example 1 5～15 Relatively uniform temperature, low heat utilization rate Comparative example 2 ＞8 Temperature uniformity, serious over-temperature phenomenon, low heat utilization rate

[0107] It can be seen from Table 1 as follows:

[0108] (1) From a comprehensive view of Examples 1 to 2, it can be seen that when the catalytic combustion device with heat self-balance provided by the present utility model performs catalytic combustion, the temperature fluctuation of the overall catalytic combustion device is small, the temperature is uniform, the temperature fluctuation ΔT is within ±10°C, no local over-temperature phenomenon occurs, and the energy utilization rate is high;

[0109] (2) From a comprehensive view of Example 1 and Examples 3 to 4, it can be seen that the structural design and layout of the disturbance heat dissipation and heat conduction components have an impact on the temperature uniformity and over-temperature situation of the catalytic combustion device. The present utility model preferably adopts inclined tooth pieces, gradually increases the outer diameter from the middle to both sides along the axial direction, and sets the rotation directions to be opposite, which can further improve the temperature uniformity of the overall catalytic combustion device and avoid the occurrence of over-temperature;

[0110] (3) From a comprehensive view of Example 1 and Example 5, it can be seen that Example 1 sets a heat dissipation device in the gas chamber. Compared with Example 5 without a heat dissipation device, the temperature fluctuation of Example 1 is only 5 - 7°C, and the temperature uniformity is high, while the temperature fluctuation in Example 5 is 9 - 16°C, with relatively large fluctuations. Thus, it shows that the present utility model preferably sets a heat dissipation device in the gas chamber, which can better ensure the temperature uniformity of the catalytic combustion device;

[0111] (4) It can be seen from the comprehensive comparison of Example 1 and Example 6 that in Example 1, the second sub-board is provided. Compared with Example 6 where the second sub-board is not provided, the temperature fluctuation in Example 1 is only 5-7 °C, and the temperature uniformity is high. While in Example 6, the temperature fluctuation is 7-18 °C, which is relatively large. This shows that the preferred setting of the second sub-board in the present utility model can better ensure the temperature uniformity of the catalytic combustion device.

[0112] (5) It can be seen from the comprehensive comparison of Example 1 and Comparative Examples 1-2 that in Comparative Example 1, the disturbance heat dissipation and heat conduction component is not provided, resulting in the inability to fully utilize the heat of catalytic combustion, low heat utilization rate, and the decline of the temperature distribution uniformity of the catalytic bed layer without the distribution and rapid heat dissipation effects of the disturbance heat dissipation and heat conduction component. In Comparative Example 2, since only the second board is provided and the first board is not provided to connect the catalytic bed layer and the disturbance heat dissipation and heat conduction component, the heat cannot be transferred to the disturbance heat dissipation and heat conduction component, resulting in not only low heat utilization rate but also serious over-temperature phenomenon. This shows that the present utility model can better ensure the temperature uniformity of the entire catalytic combustion device by designing the heat transfer component and connecting it to the disturbance heat dissipation and heat conduction component for heat transfer, and the heat transfer component is provided with the first board and the second board.

[0113] The present utility model uses the above embodiments to illustrate the detailed features of the present utility model, but the present utility model is not limited to the above detailed features, that is, it does not mean that the present utility model must rely on the above detailed features to be implemented. Those skilled in the art should understand that any improvement of the present utility model, the equivalent replacement of the technical features selected by the present utility model, the addition of auxiliary technical features, and the selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present utility model.

Claims

1. A catalytic combustion device with self-balanced heat, characterized in that: The catalytic combustion device comprises: a disturbance heat dissipation heat conducting component and a catalytic bed layer; The disturbance heat dissipation and heat conduction components and the catalytic bed are sequentially arranged along the airflow direction; the catalytic bed is used to arrange the catalyst; The disturbance heat dissipation heat conduction component comprises a heat conduction central axis perpendicular to the airflow entry direction, and at least one disturbance member arranged on the heat conduction central axis and capable of rotating; The catalytic combustion device also includes a heat transfer component connecting the catalytic bed layer and the disturbance heat dissipation heat conduction component.

2. The heat self-balancing catalytic combustion device according to claim 1 is characterized in that: The disturbance member is rotatably fixed on the heat-conducting central shaft by a limiting component, and the limiting component is used to prevent the disturbance member from moving in the axial direction; And / or, the disturbance element comprises a heat dissipation tooth-shaped structure, and the heat dissipation tooth-shaped structure has at least two teeth arranged in a centrally symmetrical manner.

3. The heat self-balancing catalytic combustion device according to claim 2 is characterized in that: When the number of the disturbance members is at least three, the outer diameter of the heat dissipation tooth-shaped structure gradually increases from the middle of the heat conduction central axis along the axial direction toward the two ends; And / or, when the number of the disturbance members is at least three, the ratio of the outer diameter of the largest heat dissipation tooth-shaped structure to the outer diameter of the smallest heat dissipation tooth-shaped structure is (1-2):

1.

4. The heat self-balancing catalytic combustion device according to claim 2 is characterized in that: The tooth pieces are obliquely arranged on the heat dissipation tooth structure; When the number of the disturbance members is at least three, the inclination directions of the teeth in the disturbance members are opposite from the middle of the heat-conducting central axis along the axial direction to the two ends.

5. The heat self-balancing catalytic combustion device according to claim 4 is characterized in that: The heat transfer component comprises at least two first plates arranged opposite to each other; a cavity is formed inside the first plates; the catalytic bed and the disturbance heat dissipation heat conduction component are both arranged in the cavity, and the disturbance heat dissipation heat conduction component is connected to the first plates; The heat transfer component further includes a second plate disposed in the cavity formed by the first plate, and the second plate divides the catalytic bed into at least two areas.

6. The heat self-balancing catalytic combustion device according to claim 5, characterized in that: The second panel comprises a first sub-panel and a second sub-panel, the first sub-panel is connected to the first panels arranged at least on two sides, each of the first sub-panels is provided with at least one second sub-panel, and the second sub-panel is perpendicular to the first sub-panel and extends to the outside of the first sub-panel; The first sub-plate, the second sub-plate and the first plate together form at least one tic-tac-toe structure; the inner area of ​​each tic-tac-toe structure is used for arranging a catalyst.

7. The heat self-balancing catalytic combustion device according to claim 6, characterized in that: The catalytic combustion device further comprises a heat-insulating layer arranged outside the first plate, and a gap is arranged between the heat-insulating layer and the first plate, and the gap is an air chamber; A heat exchange fluid inlet and a heat exchange fluid outlet are respectively arranged at two ends of the air chamber.

8. The heat self-balancing catalytic combustion device according to claim 7, characterized in that: A heat dissipation device is arranged in the air chamber.

9. The heat self-balancing catalytic combustion device according to claim 8, characterized in that: The heat dissipation device is provided with holes.

10. The heat self-balancing catalytic combustion device according to any one of claims 1 to 4, characterized in that: The catalytic combustion device also includes an exhaust gas inlet and an exhaust gas outlet arranged in sequence along the exhaust gas conveying direction; the disturbance heat dissipation heat conduction component and the catalytic bed layer are both arranged between the exhaust gas inlet and the exhaust gas outlet; The cross-sectional area of ​​the exhaust gas inlet gradually increases along the exhaust gas conveying direction.

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