A novel heat accumulating oxidation device and catalytic oxidation device

Abstract

The application provides a novel heat accumulating oxidation device and catalytic oxidation device, which has a reaction tank and an exhaust chimney in communication with the reaction tank, the inside of the reaction tank is sequentially separated into a combustion chamber, a heat exchange chamber and an exhaust chamber by a partition plate, the combustion chamber and the exhaust chamber are directly communicated through an exhaust pipe, and low-temperature waste gas is heated through heat exchange with high-temperature gas in the exhaust pipe and then enters the combustion chamber to burn. Since the waste gas has been heated through heat exchange, the combustion is more complete, which helps to completely burn and clean the harmful gas and impurities before discharging, greatly improves the gas combustion and purification effect, and meets the environmental protection requirements. Meanwhile, the heat exchange and heating process can further improve the waste heat energy utilization rate and reduce the energy consumption required for combustion.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment technology, and in particular to a novel regenerative thermal oxidation device and a catalytic oxidation device. Background Technology

[0002] Waste gas treatment refers to the technical means of treating volatile organic compounds and odorous gases. With the increasing promotion of sustainable development, heat in waste gas is stored while it is being treated. The waste gas is then subjected to thermal oxidation or catalytic oxidation before being discharged.

[0003] Traditional regenerative combustion oxidation devices use heat storage components installed in the cavity and inside the cavity to store heat in the exhaust gas. However, the exhaust gas pipes are generally honeycomb-shaped, and the exhaust gas containing high heat experiences large pressure loss and poor airflow when passing through the heat storage components, resulting in a low heat recovery rate. At the same time, after the exhaust gas is thermally oxidized or catalytically oxidized through combustion, the direct discharge of the high-heat exhaust gas also causes a certain degree of heat waste.

[0004] Meanwhile, the regenerative combustion oxidation device used in traditional technology is prone to leakage during the thermal oxidation conversion of waste gas, resulting in low treatment efficiency of traditional technology devices. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing waste gas treatment devices, such as low heat recovery rate, low waste gas treatment efficiency, and high investment costs, and to propose a regenerative thermal oxidation device and a catalytic oxidation device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a novel regenerative thermal oxidation device and a catalytic oxidation device, comprising a reaction tank and an exhaust chimney connected to the reaction tank. The interior of the reaction tank is sequentially divided by partitions into a combustion chamber, a heat exchange chamber, and an exhaust chamber that are not directly connected to each other. The combustion chamber and the exhaust chamber are directly connected through an exhaust pipe. The low-temperature exhaust gas is heated by heat exchange with the high-temperature gas in the exhaust pipe in the heat exchange chamber before entering the combustion chamber for combustion.

[0007] Further: The side of the reaction tank is provided with a low-temperature exhaust gas inlet, a low-temperature exhaust gas outlet and a combustion chamber inlet. The low-temperature exhaust gas inlet is connected to the heat exchange chamber, the low-temperature exhaust gas outlet is connected to the heat exchange chamber, the combustion chamber inlet is connected to the combustion heat, and the low-temperature exhaust gas outlet and the combustion chamber inlet are connected through an exhaust gas channel.

[0008] Further: The exhaust chamber is provided with an exhaust port on the side, which is connected to the exhaust chimney, and the combustion chamber is also provided with a combustion device on the side or top.

[0009] Preferably, the exhaust pipe has an internal hollow structure and is shaped as any one of a straight line, an arc, a bend, or a spiral.

[0010] Preferably, the exhaust gas channel has a C-shaped or arc-shaped structure, the outside of the exhaust gas channel is wrapped with heat insulation material, and the exhaust gas channel is located on the outside of the reaction vessel.

[0011] Preferably, the exhaust pipe is a ceramic exhaust pipe or a metal exhaust pipe.

[0012] Preferably, the exhaust pipes are arranged in a circle or a square in the heat exchange chamber, more preferably in a square. According to the gas flow characteristics, this can ensure the repeated heat exchange effect and keep the gas flowing towards the low-temperature exhaust gas outlet.

[0013] Preferably, the low-temperature exhaust gas inlet and the low-temperature exhaust gas outlet are staggered vertically to maximize the travel time and duration of the low-temperature exhaust gas within the heat exchange chamber, resulting in higher exchange efficiency.

[0014] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0015] In this invention, the exhaust gas to be combusted first enters the reaction tank through a low-temperature exhaust gas inlet. During its flow from right to left, the exhaust gas flow rate decreases due to the numerous exhaust pipes within the heat exchange chamber. The gas passes through the gaps in the exhaust pipes, making full contact with them and exchanging heat. The low-temperature exhaust gas is gradually heated to a higher temperature and then enters the exhaust gas channel from the low-temperature exhaust gas outlet. Finally, it enters the combustion chamber through the combustion chamber inlet for complete combustion. Because it has already undergone heat exchange heating, combustion is more complete, helping to thoroughly burn away harmful gases and impurities before discharge, greatly improving the gas combustion purification effect and meeting environmental protection requirements. Simultaneously, the heat exchange heating process can further improve the utilization rate of waste heat energy and reduce the energy consumption required for combustion. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the novel regenerative thermal oxidation device and catalytic oxidation device of the present invention;

[0017] Figure 2 This is a schematic diagram of the main structure of the novel regenerative thermal oxidation device and catalytic oxidation device of the present invention;

[0018] Figure 3 This is a top view schematic diagram of the novel regenerative thermal oxidation device and catalytic oxidation device of the present invention. Detailed Implementation

[0019] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0020] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0021] Example 1, such as Figures 1-3 As shown, the present invention provides a novel regenerative thermal oxidation device and a catalytic oxidation device, which has a reaction tank 1. The reaction tank 1 has a square or cylindrical structure. In this embodiment, a cylindrical structure is adopted to achieve the optimal combustion and heat exchange effect.

[0022] The reaction vessel 1 has a combustion chamber 11 at the top, a heat exchange chamber 14 in the middle, and an exhaust chamber 12 at the bottom. The combustion chamber 11, heat exchange chamber 14, and exhaust chamber 12 are separated by partitions and are not directly connected. The combustion chamber 11 and exhaust chamber 12 are connected by several exhaust pipes 2, which are arranged side-by-side with gaps between them for gas passage. The upper end of each exhaust pipe 2 is located on the partition between the combustion chamber 11 and the heat exchange chamber 14, and the lower end of each exhaust pipe 2 is located on the partition between the heat exchange chamber 14 and the exhaust chamber 12. Except for the two ends, the rest of the exhaust pipe 2 is located inside the heat exchange chamber 14.

[0023] The side of the reaction vessel 1 is equipped with a low-temperature exhaust gas inlet 13, a low-temperature exhaust gas outlet 21, and a combustion chamber inlet 42. The low-temperature exhaust gas inlet 13 and the low-temperature exhaust gas outlet 21 are connected to the heat exchange chamber 14, and the combustion chamber inlet 42 is connected to the combustion heat source. The low-temperature exhaust gas outlet 21 and the combustion chamber inlet 42 are connected by an exhaust gas passage 41. The exhaust gas passage 41 has a C-shaped structure, and its inner side is wrapped with insulation material. The exhaust gas passage 41 is generally chosen to have a relatively simple shape to reduce the travel distance, allowing the exhaust gas heated by the heat exchange to enter the combustion chamber as quickly as possible, avoiding a temperature drop due to a long travel distance.

[0024] The low-temperature exhaust gas outlet 21, the combustion chamber inlet 42, and the exhaust gas passage 41 constitute the connecting structure 4. To avoid occupying the internal combustion and heat exchange space, the connecting structure 4 is located on the outer side of the reaction tank 1. The low-temperature exhaust gas outlet 21 and the low-temperature exhaust gas inlet 13 are located on opposite sides of the heat exchange chamber 14 to maximize the travel and flow time of the low-temperature exhaust gas in the heat exchange chamber 14, and to fully exchange heat with the high-temperature gas in the exhaust pipe 2.

[0025] The low-temperature exhaust gas inlet 13 and the low-temperature exhaust gas outlet 21 are staggered vertically, which further increases the travel time and duration of the low-temperature exhaust gas in the heat exchange chamber 14, resulting in higher exchange efficiency.

[0026] The exhaust pipe 2 is a hollow ceramic heat storage component to achieve optimal heat exchange. In other embodiments, exhaust pipes of other shapes and materials, such as square ones, can also be selected. The standard for material selection is good thermal conductivity, and the standard for shape selection is to maximize the contact area with the low-temperature exhaust gas. In this embodiment, the exhaust pipe 2 is straight. To increase the travel distance of the high-temperature gas after combustion within the exhaust pipe 2, the exhaust pipe can be modified to a curved shape, such as an arc or a spiral, to reduce the flow velocity of the high-temperature gas within the exhaust pipe 2 and increase the travel distance, further increasing the heat exchange time with the low-temperature exhaust gas and improving heat exchange efficiency.

[0027] An exhaust port 15 is provided on the side of the exhaust chamber 12, and the exhaust port 15 is connected to the exhaust chimney 3. A combustion device 5 is also provided on the side of the combustion chamber 11, which provides the necessary ignition source and other combustion conditions for combustion. An inspection window 6 is also provided on the side of the reaction vessel 1 for maintaining and inspecting the components inside the combustion chamber 11.

[0028] Continue to combine Figure 1 As shown, the exhaust gas to be combusted first enters the reaction tank 1 through the low-temperature exhaust gas inlet 13. During the flow from right to left, the exhaust gas flow rate is reduced due to the heat exchange chamber 14 being filled with exhaust pipes 2. The exhaust gas passes through the gaps in the exhaust pipes 2, making full contact with them and exchanging heat. The low-temperature exhaust gas is gradually heated to a higher temperature and enters the exhaust gas channel 41 through the low-temperature exhaust gas outlet 21. Then, it enters the combustion chamber 11 through the combustion chamber inlet 42 for complete combustion. Because it has already undergone heat exchange heating, the combustion is more complete, which helps to completely burn off harmful gases and impurities before discharge, greatly improving the gas combustion purification effect and meeting environmental protection requirements. At the same time, the heat exchange heating process can also further improve the utilization rate of waste heat energy and reduce the energy consumption required for combustion.

[0029] The high-temperature gases after combustion enter the exhaust pipe 2 and flow downwards, simultaneously heating the exhaust pipe and exchanging heat with the low-temperature exhaust gases in the gap between the exhaust pipe 2 and the gas. This process of heat exchange continues. The cooled gases then enter the exhaust chamber 12 and then pass through the exhaust port 15 into the exhaust chimney 3 before being discharged upwards.

[0030] In this embodiment, the combustion chamber 11, the central heat exchange chamber 14, and the exhaust chamber 12 are arranged sequentially from top to bottom. In another embodiment, the arrangement of the above structures can also be reversed from bottom to top, that is, the combustion chamber 11, the central heat exchange chamber 14, and the exhaust chamber 12 are arranged sequentially from bottom to top, and the positions and directions of the remaining structures are interchanged accordingly. Of course, the exhaust chimney 3 is still located on the side of the reaction tank 1, and is connected to the exhaust chamber 12 through the exhaust port 15. The combusted gas enters the exhaust chimney 3 through the exhaust port 15 and is discharged upwards.

[0031] In summary, the materials of the spiral tube and channel are not limited to iron or ceramic tubes as described, and the internal and external parts of the device are not limited to square shapes or materials.

[0032] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A novel regenerative thermal oxidation device and catalytic oxidation device, comprising a reaction tank (1) and an exhaust chimney (3) connected to the reaction tank, characterized in that: The interior of the reaction tank (1) is divided into a combustion chamber (11), a heat exchange chamber (14) and an exhaust chamber (12) that are not directly connected to each other by a partition. The combustion chamber (11) and the exhaust chamber (12) are directly connected by a number of exhaust pipes (2). The exhaust pipes (2) are arranged side by side and there are gaps between them for gas to pass through. The low-temperature exhaust gas is heated by heat exchange with the high-temperature gas in the exhaust pipe in the heat exchange chamber before entering the combustion chamber for combustion. The side of the reaction tank is provided with a low-temperature exhaust gas inlet (13), a low-temperature exhaust gas outlet (21) and a combustion chamber inlet (42). The low-temperature exhaust gas inlet (13) is connected to the heat exchange chamber (14), the low-temperature exhaust gas outlet (21) is connected to the heat exchange chamber (14), the combustion chamber inlet (42) is connected to the combustion chamber (11), and the low-temperature exhaust gas outlet (21) and the combustion chamber inlet are connected through the exhaust gas passage (41). The exhaust chamber (12) is provided with an exhaust port (15) on the side, which is connected to the exhaust chimney (3). The combustion chamber is also provided with a combustion device (5) on the upper or side.

2. The novel regenerative thermal oxidation device and catalytic oxidation device according to claim 1, characterized in that: The exhaust pipe has an internal hollow structure and can be any one of the following shapes: straight, arc, bent, or spiral.

3. The novel regenerative thermal oxidation device and catalytic oxidation device according to claim 1, characterized in that: The exhaust gas channel (41) has a C-shaped or arc-shaped structure, and the outside of the exhaust gas channel is wrapped with heat insulation material. The exhaust gas channel is located on the outside of the reaction tank.

4. The novel regenerative thermal oxidation device and catalytic oxidation device according to claim 1, characterized in that: The exhaust pipe is either a ceramic exhaust pipe or a metal exhaust pipe.

5. The novel regenerative thermal oxidation device and catalytic oxidation device according to claim 2, characterized in that: The low-temperature exhaust gas inlet (13) and the low-temperature exhaust gas outlet (21) are staggered vertically.

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