Direct catalytic combustion equipment

Abstract

The utility model discloses direct catalytic combustion equipment which comprises a shell, a catalytic combustion chamber is installed in the shell, and a heat exchange assembly fixedly penetrates through a tail gas outlet and a gas inlet of the catalytic combustion chamber jointly. And a filtering box body is fixedly installed on one side of the top of the shell, a mixing pipe is jointly installed between the filtering box body and the heat exchange assembly, and an air inlet pipe is installed on the mixing pipe. According to the utility model, by optimizing the structural design of the mixing pipe, the problems of high mixing energy consumption and insufficient mixing effect in the prior art are effectively solved. Specifically, the layout that thick pipes and thin pipes are alternately connected is adopted, the fluid dynamic effect generated by pipe diameter changes is utilized, high-speed turbulent flow is formed at the thin pipes, meanwhile, slow flow areas are formed at the thick pipes, and the periodic change of the airflow speed is achieved. The impeller assembly arranged in the thin tube automatically rotates under the flowing action of waste gas, and a strong vortex mixing effect is generated.

Description

Technical Field

[0001] This utility model relates to the field of catalytic combustion equipment technology, and in particular to a direct catalytic combustion equipment. Background Technology

[0002] Catalytic combustion equipment is an environmentally friendly device used to treat industrial organic waste gas. It uses a catalyst to lower the combustion temperature of the organic waste gas, accelerating its oxidation and decomposition. The main working principle of catalytic combustion equipment is to use a catalyst to enable flameless combustion of organic waste gas at a relatively low temperature (usually 200-400℃), ultimately oxidizing and decomposing it into carbon dioxide and water vapor, while releasing a large amount of heat energy.

[0003] A VOCs waste gas catalytic combustion treatment device with prior art disclosure number CN219607121U includes a catalytic combustion chamber, a filter chamber and an air mixing chamber on the top surface of the catalytic combustion chamber, an exhaust fan connected to the top of the air mixing chamber, and an air inlet pipe connected to one end of the exhaust fan near the air mixing chamber.

[0004] While this equipment can improve the efficiency and quality of waste gas treatment, it has the following technical limitations:

[0005] Energy consumption issue: An independent rotating motor is required to drive the spiral mixing blades to achieve forced mixing of air and VOCs exhaust gas. The kinetic energy of the air input power and exhaust gas input power itself is not effectively utilized for auxiliary mixing, resulting in additional energy consumption.

[0006] Insufficient mixing efficiency: Relying solely on the mechanical stirring action of the spiral stirring blades results in a single mixing method and an unoptimized gas flow field distribution, leading to limited mixing uniformity and mass transfer effect.

[0007] Therefore, a direct catalytic combustion device is proposed. Utility Model Content

[0008] This invention is a direct catalytic combustion device proposed to overcome the shortcomings of existing technologies.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: a direct catalytic combustion device, including a shell, wherein a catalytic combustion chamber is installed inside the shell, and a heat exchange component is fixedly connected to the exhaust gas outlet and the air inlet of the catalytic combustion chamber.

[0010] A filter box is fixedly installed on one side of the top of the housing. A mixing pipe is installed between the filter box and the heat exchange assembly. An air inlet pipe is installed on the mixing pipe.

[0011] The mixing pipe includes multiple coarse pipes, multiple fine pipes, and a single connecting pipe. The multiple coarse pipes and multiple fine pipes are alternately arranged and fixedly connected to each other. The exhaust gas outlet of the filter box is fixedly connected to the adjacent coarse pipe. The connecting pipe is connected to the heat exchange component and is fixedly interconnected with the adjacent fine pipe.

[0012] Impeller assemblies are installed inside each of the aforementioned thin tubes;

[0013] Heating components are fixedly installed on the inner surface of each of the thick tubes.

[0014] Furthermore, the heat exchange assembly includes a heat exchanger, which is fixedly installed inside the housing. The heat exchanger's heat inlet and the exhaust gas outlet of the catalytic combustion chamber are both fixedly connected by an exhaust gas pipe. The heat exchanger's cold outlet and the exhaust gas inlet of the catalytic combustion chamber are both fixedly connected by an exhaust gas pipe. The heat exchanger's cold inlet is fixedly connected to a connecting pipe. This design enables the recovery and utilization of combustion waste heat.

[0015] Furthermore, the heat exchanger's heat medium outlet is fixedly connected to an exhaust pipe, which penetrates the housing and is fixedly connected to it. This structure ensures that the treated clean gas can be smoothly discharged.

[0016] Furthermore, each of the impeller assemblies includes a bearing housing, which is fixedly installed inside the thin tube. The inner ring of the bearing housing is fixedly connected to the impeller body. This design allows the impeller to rotate freely under the action of airflow, ensuring the mixing effect while avoiding additional power consumption.

[0017] Furthermore, each of the heating components includes a heat-conducting ring, which is fixedly installed inside the thick tube. A spiral electric heating wire is fixedly embedded inside the heat-conducting ring, and multiple heat-conducting rods are fixedly installed inside the heat-conducting ring. This structure achieves a rapid and uniform heating effect, ensuring that the exhaust gas reaches the optimal reaction temperature.

[0018] Furthermore, all of the aforementioned thin and thick tubes are made of thermal insulation material, which effectively reduces heat loss and improves thermal energy utilization.

[0019] Furthermore, the air inlet pipe passes through the thick pipe connected to the filter housing and is fixedly connected to the thick pipe. This arrangement optimizes the mixing path of air and exhaust gas.

[0020] The beneficial effects of this utility model are:

[0021] This invention, a direct catalytic combustion device, effectively solves the problems of high mixing energy consumption and insufficient mixing effect in existing technologies by optimizing the mixing tube structure design. Specifically, it adopts a layout of alternating thick and thin tubes, utilizing the fluid dynamics effect generated by the change in tube diameter to create high-speed turbulence in the thin tubes and a slow-flow zone in the thick tubes, achieving periodic changes in airflow velocity. The impeller assembly inside the thin tubes rotates spontaneously under the action of the exhaust gas flow, generating a strong vortex mixing effect. This structure achieves thorough mixing through the kinetic energy of the fluid itself, completely eliminating the need for a traditional external drive motor. While significantly reducing energy consumption, it also enables a more uniform mixing state between exhaust gas and air, providing more optimized conditions for the subsequent catalytic combustion reaction.

[0022] In use, this utility model is a direct catalytic combustion device. The heating component inside the thick tube provides necessary preheating during the start-up phase. After the operation is stable, it switches to waste heat recovery mode, which further provides more optimized conditions for the subsequent catalytic combustion reaction. Attached Figure Description

[0023] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 : A perspective view of this utility model;

[0025] Figure 2 : A cross-sectional view of this utility model;

[0026] Figure 3 Cross-sectional view of the hybrid tube of this utility model;

[0027] Figure 4 The present utility model Figure 3 Enlarged view of point A in the middle.

[0028] The attached figures are labeled as follows:

[0029] 1. Shell; 2. Filter box; 3. Thin tube; 4. Coarse tube; 5. Connecting pipe; 6. Catalytic combustion chamber; 7. Air inlet pipe; 8. Exhaust pipe; 9. Outlet pipe; 10. Waste gas pipe; 11. Heat exchanger; 12. Impeller body; 13. Bearing housing; 14. Spiral electric heating wire; 15. Heat-conducting ring; 16. Heat-conducting rod. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0031] like Figures 1 to 4 As shown, a direct catalytic combustion device is disclosed, including a housing 1. A catalytic combustion chamber 6 is installed inside the housing 1. The working principle of the catalytic combustion chamber 6 has been disclosed in the prior art (a VOCs waste gas catalytic combustion treatment device with publication number CN219607121U), so it will not be described in detail in this application. The exhaust gas outlet and the air inlet of the catalytic combustion chamber 6 are fixedly connected to a heat exchange component. The heat exchange component includes a heat exchanger 11, which is fixedly installed inside the housing 1. The heat medium inlet of the heat exchanger 11 and the exhaust gas outlet of the catalytic combustion chamber 6 are fixedly connected to a tail gas pipe 8. The cold medium outlet of the heat exchanger 11 and the waste gas inlet of the catalytic combustion chamber 6 are fixedly connected to a waste gas pipe 10. The heat medium outlet of the heat exchanger 11 is fixedly connected to an outlet pipe 9, which passes through the housing 1 and is fixedly connected to the housing 1.

[0032] A filter box 2 is fixedly installed on one side of the top of the housing 1. The working principle of the filter box 2 has been disclosed in the prior art (a VOCs waste gas catalytic combustion treatment device with publication number CN219607121U), so it will not be described in detail in this application. A mixing pipe is installed between the filter box 2 and the heat exchange component, and an air inlet pipe 7 is installed on the mixing pipe.

[0033] The mixing pipe includes multiple thick pipes 4, multiple thin pipes 3, and a single connecting pipe 5. The multiple thick pipes 4 and multiple thin pipes 3 are alternately arranged and fixedly connected to each other. The exhaust gas outlet of the filter box 2 is fixedly connected to the adjacent thick pipe 4. The cold medium inlet of the heat exchanger 11 is fixedly connected to the connecting pipe 5. The connecting pipe 5 is fixedly connected to the adjacent thin pipe 3. The air inlet pipe 7 passes through the thick pipe 4 connected to the filter box 2 and is fixedly connected to the thick pipe 4.

[0034] Impeller assemblies are installed in multiple thin tubes 3. Each impeller assembly includes a bearing housing 13, which is fixedly installed inside the thin tube 3. The inner ring of the bearing housing 13 is fixedly connected to the impeller body 12. The bearing is a sealed bearing, and its sealing structure effectively prevents grease loss.

[0035] Heating components are fixedly installed on the inner surface of multiple thick tubes 4. Each heating component includes a heat-conducting ring 15, which is fixedly installed inside the thick tube 4. A spiral electric heating wire 14 is fixedly embedded inside the heat-conducting ring 15. Multiple heat-conducting rods 16 are fixedly installed inside the heat-conducting ring 15. Both the heat-conducting ring 15 and the heat-conducting rods 16 are treated with corrosion resistance to ensure their service life.

[0036] All the thin tubes 3 and the thick tubes 4 are made of thermal insulation material.

[0037] I. Waste gas pretreatment stage:

[0038] The waste gas to be treated enters the filter box 2 through the existing pipeline system for preliminary filtration to remove particulate matter and other impurities. The purified waste gas then enters the coarse section 4 of the mixing pipe through the waste gas outlet.

[0039] II. Initial Operation Mixing and Preheating Stage:

[0040] The exhaust gas flows in the alternating thick pipe 4 and thin pipe 3. After being filtered by the existing filtration equipment, the air is delivered to the air inlet pipe 7 by the existing air pump and enters the section of the thick pipe 4, and then flows in the thick pipe 4 and thin pipe 3.

[0041] In the fourth section of the thick tube, the spiral electric heating wire 14 heats the exhaust gas and air evenly through the heat-conducting ring 15 and the heat-conducting rod 16.

[0042] In section 3 of the thin tube, the exhaust gas and air flow speeds up, driving the impeller body 12 to rotate and generate turbulence, allowing the air and exhaust gas to mix thoroughly.

[0043] The mixed gas then enters the catalytic combustion chamber 6 through various components for combustion. Under the action of the catalyst, flameless combustion occurs, and organic matter is oxidized and decomposed into CO2 and H2O.

[0044] III. Heat Exchange Stage:

[0045] The high-temperature purified gas returns to the heat exchanger 11 through the exhaust pipe 8, transfers heat to the newly entering mixed gas, and is discharged through the exhaust pipe 9. The mixed gas enters the cold medium inlet of the heat exchanger 11 through the connecting pipe 5, and exchanges heat with the high-temperature exhaust gas from the catalytic combustion chamber 6 to further increase the intake temperature. At this time, the spiral electric heating wire 14 stops heating.

[0046] It should be noted that, in actual use, an existing PLC controller can be added. The PLC controller is electrically connected to each electrical component to facilitate overall control. The specific data analysis and processing involved to further realize the control function are methods that can be implemented by technical personnel based on common knowledge. These methods are not within the scope of this solution. The above description is merely to illustrate the beneficial effects that this hardware structure improvement can achieve, based on common knowledge.

[0047] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A direct catalytic combustion device, comprising a shell (1), characterized in that: The shell (1) is equipped with a catalytic combustion chamber (6), and the exhaust gas outlet and the air inlet of the catalytic combustion chamber (6) are fixedly connected by a heat exchange component. A filter box (2) is fixedly installed on one side of the top of the housing (1). A mixing pipe is installed between the filter box (2) and the heat exchange assembly. An air inlet pipe (7) is installed on the mixing pipe. The mixing tube includes multiple thick tubes (4), multiple thin tubes (3) and a single connecting tube (5). The multiple thick tubes (4) and multiple thin tubes (3) are alternately arranged and fixedly connected to each other. The exhaust gas outlet of the filter box (2) is fixedly connected to the adjacent thick tube (4). The connecting tube (5) is connected to the heat exchange component. The connecting tube (5) is fixedly connected to the adjacent thin tube (3). Impeller assemblies are installed inside each of the multiple thin tubes (3); Heating components are fixedly installed on the inner surface of each of the thick tubes (4).

2. The direct catalytic combustion device according to claim 1, characterized in that: The heat exchange assembly includes a heat exchanger (11), which is fixedly installed inside the housing (1). The heat exchanger (11) has a heat inlet and the exhaust gas outlet of the catalytic combustion chamber (6) connected by an exhaust gas pipe (8). The heat exchanger (11) has a cold outlet and the exhaust gas inlet of the catalytic combustion chamber (6) connected by an exhaust gas pipe (10). The heat exchanger (11) has a cold inlet and a connecting pipe (5) connected by a fixed connection.

3. The direct catalytic combustion device according to claim 2, characterized in that: The heat exchanger (11) has a heat exchanger outlet with a fixed air outlet pipe (9), which is installed through the housing (1) and is fixedly connected to the housing (1).

4. The direct catalytic combustion device according to claim 1, characterized in that: Each of the impeller assemblies includes a bearing housing (13), and the bearing housing (13) is fixedly installed inside the thin tube (3). The inner ring of the bearing housing (13) is fixedly connected to the impeller body (12).

5. The direct catalytic combustion device according to claim 1, characterized in that: Each of the heating components includes a heat-conducting ring (15), and the heat-conducting ring (15) is fixedly installed inside the thick tube (4). A spiral electric heating wire (14) is fixedly embedded inside the heat-conducting ring (15), and a plurality of heat-conducting rods (16) are fixedly installed inside the heat-conducting ring (15).

6. The direct catalytic combustion device according to claim 1, characterized in that: All of the aforementioned thin tubes (3) and thick tubes (4) are made of thermal insulation material.

7. The direct catalytic combustion device according to claim 1, characterized in that: The air inlet pipe (7) is installed through the thick pipe (4) connected to the filter box (2) and is fixedly connected to the thick pipe (4).

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