Efficient thermal oxidation device for organic waste gas

Abstract

The utility model relates to the technical field of environmental protection, in particular to an efficient thermal oxidation device for organic waste gas. Comprising a thermal oxidizer main body which is provided with a gas inlet, a heat storage layer, a catalyst layer and a gas outlet; the combustor is arranged at the top of the thermal oxidizer main body; the heat storage layer is used for preheating entering waste gas and recycling heat of the treated waste gas; the catalyst layer is positioned between the heat storage layers and is used for promoting the catalytic oxidation reaction of organic pollutants in the waste gas at a relatively low temperature. The catalytic layer is arranged between the heat storage ceramic layers, and efficient degradation of organic pollutants in waste gas is achieved by means of the comprehensive effect of catalytic oxidation and direct thermal oxidation. The catalytic layer is located at the 1 / 4-3 / 4 position of the height of the thermal oxidation device body, so that waste gas can be subjected to catalytic reaction within the optimal temperature range after being preheated by the lower-layer heat storage ceramic, meanwhile, released heat can be transmitted to the upper-layer heat storage ceramic, and the purification efficiency of the waste gas is improved.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection technology, specifically to a high-efficiency thermal oxidation device for organic waste gas. Background Technology

[0002] Thermal oxidation is a common method for treating volatile organic compounds (VOCs) in waste gas. Its basic principle is to oxidize and decompose organic pollutants in the waste gas into carbon dioxide and water under high-temperature conditions. Traditional thermal oxidation equipment is mainly divided into several types, including direct thermal oxidation (DTO), regenerative thermal oxidation (RTO), and catalytic thermal oxidation (CTO). These devices ensure complete combustion of organic matter by providing sufficient temperature and residence time, thereby purifying the waste gas. However, some limitations still exist in practical applications:

[0003] When the VOCs concentration in the intake air is high, direct thermal oxidation may cause the treated emissions to exceed environmental standards. To meet stringent emission standards, pretreatment of the waste gas is usually required, such as dilution or the use of adsorption, absorption, or other treatment technologies, which undoubtedly increases the complexity of the process and operating costs. When the VOCs concentration in the intake air is low, the energy consumption required for direct thermal oxidation increases significantly because a large amount of air free of organic matter must be heated to maintain the reaction temperature. In this case, the thermal oxidation equipment has high energy consumption, poor economic efficiency, and is not conducive to long-term operation.

[0004] Traditional thermal oxidation equipment requires a large heat storage chamber and a long exhaust gas passage to ensure sufficient heat exchange and reaction time, so it is often large in size and occupies a lot of space, which is a major limiting factor for industrial sites with limited space.

[0005] Large-scale thermal oxidation equipment is usually complex in structure, containing multiple components such as burners, heat exchangers, and catalyst beds. This makes daily maintenance and repair work difficult and time-consuming, increasing the workload of operators and the management costs of enterprises. Utility Model Content

[0006] This invention provides a high-efficiency thermal oxidation device for organic waste gas, which aims to improve the purification efficiency of waste gas, effectively cope with different inlet conditions, reduce energy consumption, reduce floor space, and simplify maintenance.

[0007] To achieve the above objectives, the technical solution of this utility model is as follows:

[0008] A high-efficiency thermal oxidation device for organic waste gas includes: a thermal oxidizer body, which is provided with an air inlet, a heat storage layer, a catalytic layer and an exhaust outlet;

[0009] The burner is located on top of the thermal oxidizer body;

[0010] The heat storage layer is made of heat storage ceramic material and is used to preheat the incoming waste gas and recover the heat of the treated waste gas.

[0011] The catalytic layer is located between the heat storage layers and is used to promote the catalytic oxidation reaction of organic pollutants in the exhaust gas at a lower temperature.

[0012] Furthermore, the position of the catalyst layer is determined by the intake air volume and the composition and concentration of pollutants, and is located at 1 / 4 to 3 / 4 of the height of the main body of the thermal oxidation device.

[0013] Furthermore, a temperature sensor is installed inside the thermal oxidizer body to monitor the temperature at various points during the thermal oxidation process in real time.

[0014] Furthermore, a pressure sensor is also installed inside the thermal oxidizer body to measure the pressure at various points during the thermal oxidation process.

[0015] Furthermore, the air inlet of the main body of the thermal oxidizer is connected to an air inlet pipe to guide the organic waste gas to be treated into the thermal oxidizer.

[0016] The beneficial effects achieved by this utility model are as follows:

[0017] This invention discloses a high-efficiency thermal oxidation device for organic waste gas. By setting a catalytic layer between layers of regenerable ceramics, it utilizes the combined effects of catalytic oxidation and direct thermal oxidation to achieve efficient degradation of organic pollutants in waste gas. The catalytic layer promotes oxidation reactions at low temperatures, while thermal oxidation ensures complete decomposition under high-temperature conditions. The synergistic effect of these two processes significantly improves the removal rate of pollutants. The catalytic layer is located at 1 / 4 to 3 / 4 of the height of the main body of the thermal oxidation device, allowing the waste gas to undergo catalytic reactions within the optimal temperature range after preheating by the lower layer of regenerable ceramics. Simultaneously, the released heat can be transferred to the upper layer of regenerable ceramics, further heating subsequent waste gas intake, forming a highly efficient heat circulation system and improving the purification efficiency of the waste gas.

[0018] This invention relates to a high-efficiency thermal oxidation device for organic waste gas. Due to the optimized position of the catalyst layer, the waste gas is partially degraded and releases heat before reaching the thermal oxidation chamber, reducing the additional heat required from the burner and thus significantly reducing energy consumption. The entire device has a compact structure and a small footprint, which not only reduces manufacturing and installation costs but also lowers the space requirements, making it particularly suitable for industrial environments with limited space.

[0019] This invention relates to a high-efficiency thermal oxidation device for organic waste gas. Built-in temperature and pressure sensors enable real-time monitoring of key parameters during the thermal oxidation process. This improves the system's stability and reliability, and ensures stable and compliant emissions of the treated gas, meeting stringent environmental standards. The position of the catalytic layer can be flexibly adjusted according to the inlet air volume and the composition and concentration of pollutants, allowing the device to adapt to different waste gas treatment needs under various operating conditions and ensuring efficient and stable pollutant degradation under diverse circumstances.

[0020] This invention relates to a high-efficiency thermal oxidation device for organic waste gas. The entire device features a simple structural design and tight connections between components, facilitating daily maintenance and upkeep. Compared to traditional thermal oxidation equipment, this invention reduces the number of complex components, lowers maintenance difficulty and frequency, and extends the equipment's service life.

[0021] This invention relates to a high-efficiency thermal oxidation device for organic waste gas. By efficiently degrading organic pollutants, this invention significantly reduces the emission of harmful substances in waste gas and lowers the negative impact on the environment. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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 the structures shown in these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of a high-efficiency thermal oxidation device for organic waste gas.

[0024] In the diagram: 1. Heat storage layer; 2. Catalytic layer; 3. Thermal oxidizer body; 4. Burner.

[0025] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0028] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if the word "and / or" appears throughout the text, it means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0029] A high-efficiency thermal oxidation device for organic waste gas includes: a thermal oxidizer body 3, which has an air inlet, a heat storage layer 1, a catalytic layer 2, and an exhaust outlet; the thermal oxidizer body 3 provides a closed space for waste gas treatment, ensuring that the waste gas undergoes a full oxidation reaction under high-temperature conditions. The air inlet is located at the bottom of the thermal oxidizer body 3 and is connected to an air inlet pipe for guiding the organic waste gas to be treated into the device. The exhaust outlet is located at the bottom or side of the thermal oxidizer body 3 for discharging the treated clean gas. The exhaust outlet is typically equipped with monitoring equipment to ensure that the emitted gas meets environmental standards.

[0030] Burner 4 is located on top of the thermal oxidizer body 3. Burner 4, positioned on top of the thermal oxidizer body 3, provides the necessary heat to heat the device to a set high temperature. The power of burner 4 can be adjusted according to actual operating conditions to ensure the required temperature conditions during the thermal oxidation process.

[0031] The heat storage layer 1 is made of heat storage ceramic material and is used to preheat the incoming waste gas and recover the heat from the treated waste gas. The heat storage layer 1 is made of high-temperature resistant ceramic material, possessing excellent heat storage and thermal conductivity. Commonly used materials include cordierite and diatomaceous earth, which remain stable at high temperatures and have a long service life. When the waste gas enters the thermal oxidizer body 3, it first passes through the lower heat storage ceramic layer. At this time, the heat storage layer 1 absorbs the heat provided by the burner 4, preheating the waste gas to near the optimal activity temperature of the catalyst, preparing it for the subsequent catalytic oxidation reaction.

[0032] The catalytic layer 2 is located between the heat storage layers 1 and is used to promote the catalytic oxidation reaction of organic pollutants in the exhaust gas at a lower temperature. The position of the catalytic layer 2 is determined by the intake air volume and the composition and concentration of pollutants, and is located at 1 / 4 to 3 / 4 of the height of the main body of the thermal oxidizer from the bottom. The catalytic layer 2 is located at 1 / 4 to 3 / 4 of the height of the main body 3 of the thermal oxidizer from the bottom, and the specific position can be flexibly adjusted according to the intake air volume, the composition and concentration of pollutants. This ensures that the exhaust gas is preheated to a suitable temperature when it reaches the catalytic layer 2, and that the heat released by the catalytic reaction can be effectively transferred to the upper heat storage ceramic layer, forming a highly efficient heat circulation system.

[0033] Temperature sensors are installed inside the thermal oxidizer body 3 to monitor the temperature at various points during the thermal oxidation process in real time. Multiple temperature sensors are distributed at different heights and locations within the thermal oxidizer body 3 to monitor the temperature at various points during the thermal oxidation process. The temperature sensors can accurately measure the temperature changes of the exhaust gas, ensuring that the treatment conditions at each stage are optimal. By connecting to the control system, the temperature sensors can provide real-time temperature data feedback, adjusting the power of the burner 4 and other parameters to ensure the stability and efficiency of the thermal oxidation process.

[0034] The thermal oxidizer body 3 is also equipped with a pressure sensor to measure the pressure at various points during the thermal oxidation process. The pressure sensor can detect pressure changes during the exhaust gas flow, ensuring uniform airflow distribution and smooth circulation. By monitoring pressure changes, the pressure sensor can also promptly detect abnormalities in equipment operation, such as blockages or leaks, allowing for proactive measures to prevent safety accidents.

[0035] The air inlet of the thermal oxidizer body 3 is connected to the air inlet pipe to guide the organic waste gas to be treated into the thermal oxidizer.

[0036] The burner 4 heats the thermal oxidizer body 3 to a set high temperature to ensure that pollutants in the organic waste gas can be fully oxidized and decomposed. This device, by combining catalytic oxidation and direct thermal oxidation, improves the degradation efficiency of organic pollutants in the waste gas while reducing operating energy consumption and floor space.

[0037] Taking VOCs exhaust gas treatment under standard configuration as an example:

[0038] The equipment configuration includes a thermal oxidizer body 3 with a height of 5 meters and a diameter of 2 meters. The lower heat storage ceramic layer is 0.5 meters thick and made of high-temperature resistant ceramic material, providing excellent heat storage performance. The catalytic layer 2, located at half the height of the thermal oxidizer body 3, is 0.3 meters thick and filled with a precious metal catalyst, suitable for low-temperature catalytic oxidation reactions. The upper heat storage ceramic layer is 0.5 meters thick and made of the same material as the lower layer. The burner 4, located at the top of the thermal oxidizer body 3, has a power of 500 kW and can quickly heat the device to the set temperature. Temperature and pressure sensors are installed at different locations on the thermal oxidizer body 3 for real-time monitoring and control of temperature and pressure.

[0039] Workflow:

[0040] Start the burner 4 to heat the interior of the thermal oxidizer body 3 to 300°C. At this time, the heat storage ceramic layer begins to absorb heat, preparing to receive the incoming exhaust gas.

[0041] The VOC-containing exhaust gas is introduced into the bottom of the thermal oxidizer body 3 through the intake pipe. The exhaust gas first passes through the lower heat storage ceramic layer and is preheated to about 250°C.

[0042] The preheated exhaust gas continues to rise, reaching catalytic layer 2. Under the action of the catalyst, the organic pollutants in the exhaust gas begin to undergo catalytic oxidation, and the temperature further rises to approximately 350°C, releasing some heat in the process.

[0043] After passing through the catalytic layer 2, the exhaust gas continues to rise into the thermal oxidation chamber, where the burner 4 heats the exhaust gas to 800°C, ensuring that all organic matter is completely oxidized and decomposed into carbon dioxide and water.

[0044] The treated high-temperature exhaust gas passes through the upper heat storage ceramic layer, transferring heat to the heat storage ceramic and reducing its own temperature to approximately 150°C.

[0045] The exhaust gas passes through catalytic layer 2 again, where incompletely degraded organic matter undergoes secondary catalytic oxidation, further improving purification efficiency.

[0046] Finally, the exhaust gas, after undergoing two catalytic oxidation processes and one direct thermal oxidation process, is discharged from the exhaust port at the bottom of the thermal oxidizer body 3, meeting environmental emission standards.

[0047] After the above treatment, the treated gas is stably discharged in compliance with standards. Throughout the process, due to the optimized position of the catalyst layer 2 and the effective utilization of heat, the energy consumption of the burner 4 is significantly reduced.

[0048] The above description is only an optional embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A high-efficiency thermal oxidation device for organic waste gas, characterized in that, include: The main body of the thermal oxidizer (3) is provided with an air inlet, a heat storage layer (1), a catalytic layer (2) and an exhaust outlet; The burner (4) is located on top of the thermal oxidizer body; The heat storage layer (1) is used to preheat the incoming waste gas and recover the heat of the treated waste gas; The catalytic layer (2) is located between the heat storage layers (1) and is used to promote the catalytic oxidation reaction of organic pollutants in the exhaust gas at a lower temperature.

2. The high-efficiency thermal oxidation device for organic waste gas according to claim 1, characterized in that: The position of the catalyst layer (2) is determined by the intake air volume and the composition and concentration of pollutants, and is located at 1 / 4 to 3 / 4 of the height of the main body of the thermal oxidation device from the bottom.

3. The high-efficiency thermal oxidation device for organic waste gas according to claim 1, characterized in that: The thermal oxidizer body (3) is equipped with a temperature sensor for real-time monitoring of the temperature at each point during the thermal oxidation process.

4. The high-efficiency thermal oxidation device for organic waste gas according to claim 1, characterized in that: The thermal oxidizer body (3) is also equipped with a pressure sensor for measuring the pressure at various points during the thermal oxidation process.

5. The high-efficiency thermal oxidation device for organic waste gas according to claim 1, characterized in that: The air inlet of the thermal oxidizer body (3) is connected to the air inlet pipe to guide the organic waste gas to be treated into the thermal oxidizer.

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