Plate electrode ozone generating device integrated with tail gas decomposition unit

Abstract

The application discloses a plate electrode ozone generator integrated with a tail gas decomposition unit and belongs to the field of ozone preparation and tail gas purification. The device comprises a plate ozone generation unit, a cooling and heat dissipation unit and a tail gas decomposition unit. The tail gas decomposition unit is arranged above the plate ozone generation unit. The tail gas decomposition unit comprises a shell, and a preheating interlayer is arranged in the inner layer of the shell. The cooling gas stream sent by the cooling and heat dissipation unit passes through the plate ozone generation unit and is sent into the preheating interlayer. The application realizes stepwise recycling of discharge waste heat by passing the discharge waste heat brought out by the cooling and heat dissipation unit into the preheating interlayer of the tail gas decomposition unit, thereby reducing operation energy consumption. The application adopts gradient spacing heat dissipation fins with a smaller spacing in a central region than in an edge region, thereby specifically strengthening the heat dissipation capacity and guaranteeing the ozone generation efficiency and concentration stability.

Description

Technical Field

[0001] This invention relates to the field of ozone preparation and exhaust gas purification technology, specifically to a plate electrode ozone generator with an integrated exhaust gas decomposition unit. Background Technology

[0002] Plate electrode ozone generators rely on dielectric barrier discharge to generate ozone, making them a core gas source device in industrial oxidation, water treatment and disinfection fields. The exhaust gas decomposition unit is used to degrade residual ozone and nitrogen oxides after ozone application, ensuring that emissions meet standards. The air-cooled heat dissipation system provides temperature control support for the discharge electrodes and is a key structure to ensure stable ozone production.

[0003] In existing technologies, plate ozone generators and exhaust gas decomposition units are generally installed separately and connected to pipelines on-site. The reaction temperature of the exhaust gas catalytic unit is easily affected by fluctuations in ambient temperature and device operating load. In low-temperature environments or under low-load conditions, the catalyst activity is insufficient, and the synergistic purification depth of ozone and nitrogen oxides is difficult to guarantee stably. Summary of the Invention

[0004] The purpose of this invention is to provide a plate electrode ozone generator with an integrated exhaust gas decomposition unit, so as to solve the problem that the reaction temperature of the exhaust gas catalytic unit in the prior art is easily affected by the fluctuation of ambient temperature and device operating load.

[0005] The technical problem to be solved by the present invention can be achieved through the following technical solution: a plate electrode ozone generator with an integrated exhaust gas decomposition unit, comprising a plate ozone generator, a cooling and heat dissipation unit and an exhaust gas decomposition unit; the exhaust gas decomposition unit is disposed above the plate ozone generator; the exhaust gas decomposition unit includes a shell, the inner layer of which is provided with a preheating jacket, and the cooling airflow delivered by the cooling and heat dissipation unit passes through the plate ozone generator and is sent into the preheating jacket; the inlet of the exhaust gas decomposition unit is connected to the exhaust gas pipe of an external application device.

[0006] Preferably, the plate ozone generating unit includes a frame, inside which two plate electrodes are arranged in parallel, and a discharge cavity is provided between the two plate electrodes; oxygen-rich air flows horizontally through the discharge cavity to generate ozone.

[0007] Preferably, the cooling and heat dissipation unit includes a heat dissipation component and a cooling fan. The heat dissipation component includes two symmetrically arranged finned heat dissipation elements, each finned heat dissipation element including a heat dissipation bonding plate. One side of each of the two heat dissipation bonding plates is tightly bonded to one side of each of the two flat electrode plates, and several heat dissipation fins are fixedly connected to the other side of each of the two heat dissipation bonding plates. The cooling fan is disposed below the frame. The bottom and top of the frame are respectively provided with a heat dissipation air inlet and a heat dissipation air outlet. The output end of the cooling fan is correspondingly disposed to the heat dissipation air inlet, and the heat dissipation air outlet is connected to the preheating interlayer through a connecting air duct.

[0008] Preferably, the spacing between the heat dissipation fins in the center area of ​​the corresponding flat plate electrode is smaller than the spacing between the heat dissipation fins at the edge of the corresponding flat plate electrode.

[0009] Preferably, a phase change energy storage unit is installed in the middle of the heat dissipation bonding plate; the phase change energy storage module includes a package, and the phase change energy storage unit is installed in the middle of the heat dissipation bonding plate; the phase change energy storage unit includes a package, and the interior of the package is filled with a phase change material, which is a paraffin-based phase change material, so as to absorb latent heat and suppress the peak temperature rise of the discharge cavity under full load conditions of the plate ozone generator, and release heat to maintain the cooling air temperature stability under low load conditions of the plate ozone generator.

[0010] Preferably, the encapsulation body is divided into two encapsulation structures, and the phase change materials filled inside the two encapsulation structures have different phase change temperatures; the encapsulation structure located in the lower section is close to the heat dissipation air inlet and is the low phase change section, while the encapsulation structure located in the upper section is close to the heat dissipation air outlet and is the high phase change section; the phase change temperature of the phase change material filled in the high phase change section is higher than that of the phase change material filled in the low phase change section.

[0011] Preferably, the outer wall of the encapsulation shell of the two-section encapsulation structure is provided with toothed interlocking grooves, and a plurality of the heat dissipation fins are fixedly connected to an elastic sheet on the side near the encapsulation shell, and the elastic sheet is mated and fitted with the toothed interlocking groove.

[0012] Preferably, the exhaust gas decomposition unit is divided into a front-end oxidation section and a rear-end catalytic reduction section from top to bottom; the middle of the preheating jacket is divided into an upper jacket chamber and a lower jacket chamber by a jacket partition; a duct partition is fixedly connected to the middle of the connecting duct, the lower part of the duct partition is set as a preheating duct, the bottom port of the preheating duct is aligned with the heat dissipation outlet, and a diverter is fixedly connected to both sides of the preheating duct. An upper distribution duct, a lower distribution square duct, and a bypass exhaust duct are fixedly connected to the upper part of the diverter; the upper distribution duct and the lower distribution duct are respectively connected to the upper jacket chamber and the lower jacket chamber, and a distribution valve is fixedly installed in the middle of the upper distribution duct, the lower distribution duct, and the bypass exhaust duct; A main exhaust duct is provided on one side of the exhaust gas decomposition unit. The upper and lower interlayer chambers are both connected to the main exhaust duct through discharge pipes. The bypass exhaust pipe is also connected to the main exhaust duct. A treatment duct is provided above the duct partition. The top of the treatment duct is connected to the bottom of the exhaust gas decomposition unit, and one side of the treatment duct is connected to the main exhaust duct through a side pipe. A main exhaust valve is fixedly installed on the top of the main exhaust duct. The front oxidation section has a cavity structure. The middle of the preheating interlayer is divided into an upper interlayer chamber and a lower interlayer chamber by an interlayer partition. The upper interlayer chamber corresponds to the outer wall of the front oxidation section, and the lower interlayer chamber corresponds to the outer wall of the rear catalytic reduction section. A main exhaust duct is provided on one side of the exhaust gas decomposition unit. The upper and lower interlayer chambers are both connected to the main exhaust duct through discharge pipes. A main exhaust valve is fixedly installed on the top of the main exhaust duct.

[0013] Preferably, the exhaust gas decomposition unit is divided into a front-end oxidation section and a rear-end catalytic reduction section from top to bottom; the front-end oxidation section has a cavity structure to allow residual ozone and nitrogen oxides to mix fully and complete the oxidation reaction; the rear-end catalytic reduction section is equipped with an annular packing frame, the edges of which are filled with catalytic packing to simultaneously complete ozone decomposition and nitrogen oxide catalytic reduction; the upper interlayer chamber corresponds to the outer wall of the front-end oxidation section, and the lower interlayer chamber corresponds to the outer wall of the rear-end catalytic reduction section.

[0014] Preferably, a guide cone is fixedly connected to the middle of the packing frame.

[0015] Preferably, the phase change energy storage module is filled with a thermally conductive skeleton.

[0016] Compared with the prior art, the beneficial effects of this application are as follows: 1. The plate electrode ozone generator with integrated exhaust gas decomposition unit of the present invention effectively reduces the overall machine footprint and installation cost by integrating the exhaust gas decomposition unit onto the plate ozone generator unit. At the same time, the waste heat from the discharge brought out by the cooling heat dissipation unit is introduced into the preheating jacket of the exhaust gas decomposition unit, and the catalytic reaction zone is indirectly heated through wall heat transfer, realizing the cascade recovery and utilization of discharge waste heat and reducing operating energy consumption. The present invention uses gradient spacing heat dissipation fins with a smaller spacing in the center area than in the edge area to specifically enhance heat dissipation capacity, balance the overall temperature distribution of the electrode, avoid overheating in the center leading to high-temperature decomposition of ozone, and ensure ozone generation efficiency and concentration stability.

[0017] 2. To address the problems of existing plate-type ozone generators, such as separate layout of ozone generation and exhaust gas treatment, large space occupation, low utilization rate of direct waste heat emission, and uneven electrode heat dissipation affecting ozone stability, this invention adopts an integrated architecture that combines ozone generation and exhaust gas purification functions. At the same time, it reuses cooling waste heat as catalytic preheating energy and matches the electrode heat flow distribution with gradient-spacing fins. Based on compact integration, it achieves energy cascade utilization and uniform discharge temperature, breaking through the conventional design concept of separate setup and combining integration compactness, energy efficiency, and operational stability.

[0018] 3. The two-stage series gradient phase change energy storage structure of the present invention, by setting two independent encapsulation units with high and low phase change temperatures along the airflow direction, matches the cooling air temperature rise law along the path, greatly improving the energy storage utilization rate and effective temperature control load range of the phase change material; with the cooperation structure of elastic sheet and toothed interlocking groove, it adaptively compensates for the phase change volume expansion and contraction, maintains stable contact heat exchange in the long term, and suppresses the decay of temperature control performance. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention; Figure 2 This is a side view schematic diagram of the present invention; Figure 3 This is a top cross-sectional view of the plate-type ozone generating unit of the present invention; Figure 4 This is a perspective view of the internal structure of the schematic plate-type ozone generating unit of the present invention; Figure 5 This is a side cross-sectional view of the heat dissipation component of the present invention; Figure 6 This is a schematic diagram of the internal structure of the exhaust gas decomposition unit of the present invention; Figure 7 This is a front cross-sectional view of the present invention; Figure 8 This is a side cross-sectional view of the present invention.

[0020] Explanation of reference numerals in the attached figures: 101. Frame; 102. Flat electrode; 103. Heat sink fins; 104. Discharge chamber; 105. Encapsulation body; 106. Phase change material; 107. Thermally conductive frame; 108. Elastic sheet; 109. Heat dissipation air inlet; 110. Heat dissipation air outlet; 111. Heat dissipation bonding plate; 201. Cooling fan; 202. Cooling fan; 203. Air inlet baffle; 301. Connecting air duct; 302. Air duct baffle; 303. Diverter; 304. Lower distribution air duct; 305. Upper distribution air duct; 401. Housing; 402. Lower interlayer chamber; 403. Upper interlayer chamber; 404. Interlayer baffle; 405. Catalytic packing; 406. Guide cone; 407. Side pipe; 408. Main exhaust duct; 409. Bypass exhaust duct; 410. Exhaust pipe; 411. Discharge pipe. Detailed Implementation

[0021] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0022] Example 1 Existing plate ozone generators are usually independent unit structures, requiring external auxiliary equipment for exhaust gas treatment. The overall layout is scattered and occupies a large space. In addition, the waste heat generated by electrode heat dissipation is directly emitted, resulting in low energy utilization. At the same time, the heat flow distribution of the plate electrode 102 is uneven, and the conventional equidistant fins are prone to uneven electrode temperature distribution, affecting the stability of ozone generation.

[0023] like Figures 1 to 8 In this embodiment, a plate electrode ozone generator with an integrated exhaust gas decomposition unit includes a plate ozone generator, a cooling and heat dissipation unit, and an exhaust gas decomposition unit. The exhaust gas decomposition unit is disposed above the plate ozone generator. The exhaust gas decomposition unit includes a housing 401, and a preheating interlayer is provided in the inner layer of the housing 401. The cooling airflow sent by the cooling and heat dissipation unit passes through the plate ozone generator and is sent into the preheating interlayer. The inlet of the exhaust gas decomposition unit is connected to the exhaust gas pipe 410 of an external ozone application device.

[0024] The plate ozone generator unit includes a frame 101, with two flat plate electrodes 102 arranged in parallel inside the frame 101, and a discharge chamber 104 between the two flat plate electrodes 102; oxygen-rich air flows horizontally through the discharge chamber 104 to generate ozone.

[0025] The cooling and heat dissipation unit includes a heat dissipation component and a cooling fan 201. The heat dissipation component includes two symmetrically arranged finned heat dissipation components. Each finned heat dissipation component includes a heat dissipation bonding plate 111. One side of each of the two heat dissipation bonding plates 111 is tightly bonded to one side of each of the two flat electrode 102. Several heat dissipation fins 103 are fixedly connected to the other side of each of the two heat dissipation bonding plates 111. The cooling fan 201 is located below the frame 101. The bottom and top of the frame 101 are respectively provided with a heat dissipation air inlet 109 and a heat dissipation air outlet 110. The output end of the cooling fan 201 is correspondingly arranged with the heat dissipation air inlet 109. The heat dissipation air outlet 110 is connected to the preheating jacket through a connecting air duct 301.

[0026] The spacing between the heat dissipation fins 103 in the central area of ​​the corresponding flat plate electrode 102 is smaller than the spacing between the heat dissipation fins 103 at the edge of the corresponding flat plate electrode 102.

[0027] The working principle of this embodiment is as follows: Figure 3 Oxygen-enriched air is introduced into the discharge chamber 104, where ozone is generated under the dielectric barrier discharge effect of the flat plate electrode 102. A cooling fan 201 delivers cooling airflow from the bottom of the frame 101, passing through the gaps in the heat dissipation fins 103 from bottom to top, carrying away the heat generated by the flat plate electrode 102. The heated cooling airflow is then sent through the heat dissipation outlet 110 and the connecting duct 301 into the preheating jacket of the exhaust gas decomposition unit, where it preheats the internal reaction area through wall heat transfer. Exhaust gas generated by the external ozone application equipment enters from the top exhaust pipe 410 of the exhaust gas decomposition unit, is purified, and then discharged. The symmetrically arranged finned heat dissipation components on both sides correspond to the two flat plate electrodes 102, ensuring balanced heat dissipation on both sides and preventing unilateral temperature differences from interfering with the stability of the discharge gap.

[0028] It should be emphasized that the core improvement of this embodiment lies in the adoption of an integrated layout with stacked elements, which integrates the exhaust gas treatment function into the ozone generator body, while recovering and utilizing the cooling waste heat for exhaust gas catalytic preheating, thereby achieving efficient energy utilization; and by matching the electrode heat flux density distribution through fin structures with different spacings, the surface temperature uniformity of the flat electrode 102 is improved, ensuring stable ozone generation efficiency.

[0029] Example 2 It is understandable that in Example 1, relying solely on natural heat dissipation from the fins, when the device load fluctuates significantly, the temperature rise of the discharge chamber 104 will fluctuate drastically in sync with the heat generation. Under full load, ozone decomposition at high temperatures is likely to occur, while under low load, insufficient cooling air temperature leads to a decrease in the catalytic activity of the exhaust gas, resulting in insufficient temperature control buffering capacity.

[0030] like Figures 4 to 5To address the aforementioned issues, a phase change energy storage unit is installed in the middle of the heat dissipation bonding plate 111. The phase change energy storage unit includes a package 105, which is internally filled with a phase change material 106. The phase change material 106 is a paraffin-based phase change material. This allows the plate-type ozone generator to absorb latent heat and suppress the peak temperature rise of the discharge cavity 104 under full load conditions, and to release heat to maintain a stable cooling air temperature under low load conditions.

[0031] The working principle of phase change energy storage units: such as Figure 5 Under full load conditions, the heat generated by the electrode increases, and when the temperature reaches the phase change point, the phase change material 106 melts, absorbing a large amount of latent heat and suppressing the peak temperature rise of the discharge cavity 104. Under low load conditions, the heat generated by the electrode decreases, and when the temperature is below the phase change point, the phase change material 106 solidifies, releasing the stored latent heat and maintaining the base temperature of the cooling air.

[0032] It should be emphasized that the core improvement of this embodiment lies in embedding a phase change energy storage unit in the high heat flux zone of the heat dissipation bonding plate 111, using the latent heat of phase change of paraffin-based materials to achieve heat transfer, passively suppressing temperature changes caused by load fluctuations, without the need for additional power and control components, and the structure is simple and reliable.

[0033] It should be noted that, such as Figure 4 The phase change energy storage unit is arranged in the high heat flux zone at the center of the flat plate electrode 102, which has the shortest heat exchange path and the best energy storage response efficiency.

[0034] Example 3 It is understandable that in Embodiment 2, the single-cavity phase change module corresponds to only a single phase change temperature, while the cooling air continuously absorbs heat and rises in temperature along the flow direction. The temperature difference between the air inlet side and the air outlet side is significant, resulting in insufficient energy storage utilization of the phase change material 106 on the air inlet side and premature saturation and loss of buffering capacity on the air outlet side. At the same time, the solid-liquid conversion of the phase change material 106 is accompanied by volume change. After long-term cycling, gaps are easily generated between the package 105 and the fins, increasing the contact thermal resistance and reducing the temperature control performance.

[0035] like Figures 4 to 5 To solve the above problems, the package 105 is divided into two package structures, and the phase change materials 106 filled inside the two package structures have different phase change temperatures. The package structure located in the lower section is close to the heat dissipation air inlet 109 and is the low phase change section with a phase change temperature of 55°C. The package structure located in the upper section is close to the heat dissipation air outlet 110 and is the high phase change section with a phase change temperature of 65°C. The phase change temperature of the phase change material 106 filled in the high phase change section is higher than that of the phase change material 106 filled in the low phase change section.

[0036] The outer wall of the two-section encapsulation shell 401 is provided with toothed interlocking grooves. Several heat dissipation fins 103 are fixedly connected to elastic sheets 108 on the side near the encapsulation shell 401. The elastic sheets 108 are mated and attached to the toothed interlocking grooves to compensate for the contact gap caused by the phase change volume change of the encapsulation structure and ensure stable heat transfer.

[0037] The working principle of this embodiment is as follows: Figures 7 to 8 The cooling air flows from bottom to top, first passing through the low phase change section and then through the high phase change section. The low phase change section bears the basic heat load, and the high phase change section bears the peak heat load, forming a gradient energy storage layout that matches the change in air temperature along the path. The elastic sheet 108 continuously provides pre-tightening force, compressing when expanding during phase change and rebounding when contracting, always keeping the fins in close contact with the encapsulation shell 401.

[0038] It should be emphasized that the core improvement of this embodiment lies in splitting the single-stage phase change into two stages, high and low temperature, connected in series along the airflow. This matches the temperature rise pattern along the cooling airflow, significantly improving the energy storage utilization rate and effective temperature control load range of the phase change material 106. Simultaneously, through the cooperation of the elastic sheet 108 and the toothed interlocking groove, it adaptively compensates for volume expansion and contraction, maintaining stable contact heat transfer performance over the long term. In specific implementations, multiple phase change stages can also be set.

[0039] It should be noted that the two encapsulation structures are sealed independently, and the materials with different phase transition temperatures are not mixed.

[0040] Example 4 It is understandable that in Example 3, the exhaust gas decomposition unit adopts an overall preheating jacket, and the waste heat air volume can only be adjusted as a whole. When the load changes, the temperature control response is lagging and it is difficult to match the temperature requirements of the catalytic reaction.

[0041] like Figures 7 to 8 To address the aforementioned issues, the exhaust gas decomposition unit is internally divided into a front-end oxidation section and a rear-end catalytic reduction section from top to bottom. The middle of the preheating jacket is divided into an upper jacket chamber 403 and a lower jacket chamber 402 by a jacket partition 404. A duct partition 302 is fixedly connected to the middle of the connecting duct 301, and the lower part of the duct partition 302 is configured as a preheating duct. The bottom port of the preheating duct is aligned with the heat dissipation outlet 110, and both sides of the preheating duct are fixed. A diversion manifold 303 is connected, and an upper distribution duct 305, a lower distribution duct 304, and a bypass exhaust duct 409 are fixedly connected to the upper part of the diversion manifold 303. The upper distribution duct 305 and the lower distribution duct 304 are respectively connected to the upper mezzanine chamber 403 and the lower mezzanine chamber 402. A distribution valve is fixedly installed in the middle of the upper distribution duct 305, the lower distribution duct 304, and the bypass exhaust duct 409 for dynamically adjusting the proportion of the three airflows. A main exhaust duct 408 is provided on one side of the exhaust gas decomposition unit. The upper interlayer chamber 403 and the lower interlayer chamber 402 are both connected to the main exhaust duct 408 through the discharge pipe 411. A bypass exhaust pipe 409 is connected to the main exhaust duct 408. A treatment air duct is provided above the air duct partition 302. The top of the treatment air duct is connected to the bottom of the exhaust gas decomposition unit, and one side of the treatment air duct is connected to the main exhaust duct 408 through the side pipe 407. A main exhaust valve is fixedly installed on the top of the main exhaust duct 408. The control system collects the temperature difference between the two encapsulation structures as a feedback signal, and combines it with the catalytic bed temperature feedback to match the preheating air volume distribution under different loads.

[0042] The working principle of this embodiment is as follows: Figure 2 and Figures 7-8 The cooling hot air is divided into three paths by the diverter 303, which are respectively sent to the upper interlayer chamber 403, the lower interlayer chamber 402, and the bypass exhaust air. The opening of the three distribution valves is independently adjusted. The control system uses the temperature difference between the two phase changes as a load feedback signal to predict the change of the operating load of the plate ozone generator unit, and adjusts the air volume ratio in combination with the actual temperature of the catalytic bed to achieve differentiated temperature control of the upper and lower interlayers. When the operating load of the plate ozone generator unit increases and the temperature difference increases, it is predicted that the waste heat demand will increase, and the valve opening of the lower distribution air duct 304 will be increased in advance to increase the preheating air supply of the downstream catalytic reduction section. When the operating load of the plate ozone generator unit decreases and the temperature difference decreases, it is predicted that the waste heat demand will decrease, and the corresponding distribution valve opening will be closed in advance, while the opening of the bypass exhaust air duct 409 will be increased simultaneously to unload excess waste heat.

[0043] It should be emphasized that the core improvement of this embodiment is that the preheating jacket is physically divided into independent upper and lower chambers, corresponding to different reaction areas, and the waste heat air volume is differentiated and scheduled through three independent distribution valves; at the same time, the natural temperature difference of the two phase changes can be reused as a feedback control signal to improve the temperature control response speed and accuracy, and realize the upgrade from passive buffering to active thermal scheduling.

[0044] It should be noted that the three exhaust channels are ultimately integrated into the main exhaust duct 408, and the main exhaust valve controls the external flow, simplifying the overall exhaust structure of the unit.

[0045] Example 5 It is understandable that in Example 4, the internal reaction structure of the exhaust gas decomposition unit is simple, the pre-oxidation of nitrogen oxides is insufficient, and the gas flow is prone to central deviation when entering the catalytic zone, resulting in uneven catalyst utilization and limited overall exhaust gas purification depth.

[0046] like Figures 7 to 8To address the aforementioned issues, the exhaust gas decomposition unit is internally divided into a front-end oxidation section and a rear-end catalytic reduction section from top to bottom. The front-end oxidation section is a cavity structure used to allow residual ozone and nitrogen oxides to fully mix and complete the oxidation reaction. The rear-end catalytic reduction section is equipped with an annular packing frame, the edges of which are filled with catalytic packing 405 to simultaneously complete ozone decomposition and nitrogen oxide catalytic reduction. The upper interlayer chamber 403 corresponds to the outer wall of the front-end oxidation section, and the lower interlayer chamber 402 corresponds to the middle of the packing frame of the rear-end catalytic reduction section, with a guide cone 406 fixedly connected.

[0047] The working principle of this embodiment is as follows: After the exhaust gas enters from the top, it is first fully mixed in the cavity of the front oxidation section to complete the pre-oxidation of nitrogen oxides; then the airflow flows downward through the guide cone 406 to the surrounding area, and evenly passes through the annular catalytic packing layer 405 to simultaneously complete the ozone decomposition and nitrogen oxide catalytic reduction.

[0048] It should be emphasized that the core improvement of this embodiment lies in the adoption of a two-stage series reaction process of oxidation followed by reduction, which improves the treatment depth of nitrogen oxides; combined with the central guide cone 406 and the annular packing structure, it achieves uniform airflow distribution, improves the overall utilization rate of the catalyst, and ensures the uniformity and stability of the exhaust gas purification effect.

[0049] It should be noted that the upper and lower interlayer chambers 402 correspond one-to-one with the two reaction zones, and the zoned temperature control effect can directly act on the corresponding reaction process, resulting in a higher degree of coupling between temperature control and reaction.

[0050] Example 6 It is understandable that in Example 4, nitrate byproducts will accumulate on the surface of the catalyst after long-term operation, leading to a gradual decline in activity. Conventional regeneration methods require external heating equipment or dismantling of packing materials, resulting in high energy consumption, long maintenance cycles, and affecting the continuous operation capability of the equipment.

[0051] like Figures 7 to 8 To solve the above problems, the cooling air forms a closed loop between the finned heat sink, the connecting air duct 301 and the preheating jacket; the fan runs at low speed and delivers the waste heat stored in the phase change module to the catalyst bed in a closed loop to maintain the temperature of the catalyst bed and realize the thermal decomposition and regeneration of nitrate byproducts on the catalyst surface.

[0052] The working principle of this embodiment is as follows: After the equipment stops, the main exhaust valve is closed to cut off the connection between the air duct and the outside. The cooling fan 201 runs at low speed, driving the airflow to form a closed loop between the finned heat sink, the connecting air duct 301, the preheating jacket and the main exhaust duct 408. The phase change module slowly releases the stored latent heat, and the temperature of the catalytic bed is continuously maintained by the circulating air, so that the nitrate by-products are slowly thermally decomposed and desorbed. In this embodiment, the cooling fan 201 includes a fan frame, and several cooling fans 202 are fixedly installed in the middle of the inner wall of the fan frame. When the internal closed loop is performed, the direction and speed of the circulating airflow can be controlled by adjusting the speed and power or start and stop status of different cooling fans 202. An air inlet baffle 203 is fixedly connected to the bottom of the fan frame. Several air inlets are opened in the middle of the air inlet baffle 203. An upwardly inclined guide vane is fixedly connected inside the air inlet, which is used for dust prevention on the one hand and to reduce gas backflow during the circulation process on the other.

[0053] It should be emphasized that the core improvement of this embodiment lies in reusing the existing phase change energy storage and ventilation structure, and realizing closed-loop internal circulation during shutdown by switching the main exhaust valve. The catalyst can be regenerated in situ with zero additional heat source, without disassembling the equipment, which greatly reduces maintenance costs and downtime, and extends the service life of the catalyst.

[0054] It should be noted that the fan operates at low speed and the airflow is gentle during the regeneration process to avoid pulverization damage to the catalyst due to thermal shock or high-speed scouring.

[0055] Example 7 It is understandable that in Example 2, the paraffin-based phase change material 106 has a low thermal conductivity, slow internal heat transfer speed, and delayed charge and discharge response, making it difficult to adapt to the working conditions of frequent and rapid load changes, and the temperature control timeliness is insufficient.

[0056] like Figure 5 To address the aforementioned issues, the phase change energy storage module is filled with a graphite foam thermally conductive skeleton 107 to improve the thermal conductivity of the phase change material 106, accelerate the charge and discharge thermal response speed, and adapt to operating conditions with frequent and rapid load changes.

[0057] The working principle of this embodiment is as follows: a heat-conducting network is formed inside the phase change material 106 by the heat-conducting skeleton 107, which can quickly diffuse heat from the wall to the inside of the material, and can also quickly conduct internal heat to the wall, eliminating internal heat transfer lag and improving the response speed of phase change charging and discharging heat.

[0058] It should be emphasized that the core improvement of this embodiment lies in embedding a thermally conductive skeleton 107 inside the phase change material 106, which significantly improves the thermal conductivity and response speed of the phase change module without changing the energy storage capacity, making it suitable for application scenarios with rapid load fluctuations.

[0059] It should be noted that, such as Figure 5 The graphite foam skeleton also serves as a structural support, which can buffer the internal stress caused by the volume change of the phase transition and improve the long-term reliability of the encapsulation structure.

[0060] The working principle of this invention is as follows: Under normal operating conditions, oxygen-enriched air is introduced into the discharge chamber 104 inside the plate ozone generator unit through an external pipeline. Two parallel plate electrodes 102 generate dielectric barrier discharge, causing the oxygen-enriched air flowing horizontally through the discharge chamber 104 to ionize and generate ozone. One end of the ozone is connected to an external ozone application device through a working pipeline for use. While the plate-type ozone generator is operating, the cooling fan 201 blows cooling airflow into the heat dissipation air inlet 109 at the bottom of the frame 101. The airflow passes from bottom to top through the gaps between the heat dissipation fins 103 of the heat dissipation components on both sides, and through the heat dissipation bonding plate 111 that is tightly attached to the plate electrode 102, carrying away the heat generated by the discharge of the plate electrode 102. The phase change energy storage unit installed in the middle of the heat dissipation bonding plate 111 undergoes a solid-liquid phase change with its own temperature change: under full load conditions, the phase change material 106 melts and absorbs latent heat; under low load conditions, the phase change material 106 solidifies and releases latent heat, thereby smoothing the fluctuation of the cooling air temperature. The cooling airflow passes through the low phase change section and the high phase change section of the encapsulation structure along the flow direction, gradually absorbing heat and increasing temperature; the elastic sheet 108 on the inner side of the heat dissipation fins 103 abuts against the toothed engagement groove of the encapsulation shell 401, adaptively expanding and contracting with the phase change volume change of the encapsulation structure, continuously maintaining the contact and adhesion between the fins and the encapsulation body 105.

[0061] The cooling airflow, after absorbing heat and heating up, flows out from the heat dissipation outlet 110 at the top of the rack 101 and enters the preheating air duct within the connecting air duct 301. It is then split into three independent airflows by the diverter 303. These three airflows enter the upper distribution duct 305, the lower distribution square duct, and the bypass exhaust duct 409, respectively, with the flow ratio independently adjusted by the distribution valves on each duct. Specifically, the upper distribution duct 305 delivers hot air into the upper jacketed chamber 403, heating the outer wall of the front oxidation section through wall heat transfer; the lower distribution square duct delivers hot air into the lower jacketed chamber 402, heating the outer wall of the rear catalytic reduction section through the metal wall; and the airflow in the bypass exhaust duct 409 directly merges into the main exhaust duct 408. The control system collects the real-time temperature difference between the two encapsulation structures as a feedback signal, and, combined with the temperature feedback of the catalytic bed, dynamically adjusts the opening of the three distribution valves to match the preheating airflow distribution under different loads.

[0062] The exhaust gas generated by the external ozone application equipment enters the device through the inlet of the exhaust gas decomposition unit. It flows downwards through the cavity structure of the front oxidation section, where residual ozone and nitrogen oxides mix and contact thoroughly, completing the pre-oxidation reaction. The gas then flows downwards into the rear catalytic reduction section, is guided outwards by the guide cone 406 in the middle of the packing frame, and evenly passes through the catalytic packing 405 filling the edge of the annular packing frame. Under the action of the catalyst, ozone decomposition and nitrogen oxide catalytic reduction are completed simultaneously, and the purified gas is discharged from the bottom of the exhaust gas decomposition unit. The airflow in the upper jacketed chamber 403 and lower jacketed chamber 402, after heat exchange, converges into the main exhaust duct 408 through their respective discharge pipes 411. After merging with the airflow from the bypass branch, the gas is discharged outside the device through the open main exhaust valve.

[0063] When the unit stops and enters the regeneration state, the main exhaust valve closes, cutting off the connection between the air path and the outside atmosphere; the cooling fans 202 at different positions of the cooling fan 201 can alternately operate at low speed, driving the airflow to form a closed internal circulation between the finned heat sink, the connecting air duct 301, the preheating jacket and the main exhaust duct 408; the phase change energy storage unit slowly releases the stored latent heat, and continuously transfers heat to the catalyst bed through the circulating airflow to maintain the bed temperature, so that the nitrate byproducts adsorbed on the catalyst surface undergo thermal decomposition and desorption, completing the in-situ regeneration of the catalyst.

[0064] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed application.

Claims

1. A plate electrode ozone generator with an integrated exhaust gas decomposition unit, characterized in that, It includes a plate-type ozone generating unit, a cooling and heat dissipation unit, and an exhaust gas decomposition unit; the exhaust gas decomposition unit is located above the plate-type ozone generating unit; the exhaust gas decomposition unit includes a housing (401), the inner layer of the housing (401) is provided with a preheating jacket, the cooling airflow sent out by the cooling and heat dissipation unit passes through the plate-type ozone generating unit and is sent into the preheating jacket; the inlet of the exhaust gas decomposition unit is connected to the exhaust gas pipe (410) of an external application device.

2. The plate electrode ozone generator with an integrated exhaust gas decomposition unit as described in claim 1, characterized in that, The cooling and heat dissipation unit includes a heat dissipation assembly and a cooling fan (201). The heat dissipation assembly includes two symmetrically arranged finned heat dissipation components. Each finned heat dissipation component includes a heat dissipation bonding plate (111). One side of each of the two heat dissipation bonding plates (111) is tightly bonded to one side of each of the two flat plate electrodes (102). Several heat dissipation fins (103) are fixedly connected to the other side of each of the two heat dissipation bonding plates (111). The plate-type ozone generating unit includes a frame (101). The frame (101) has... Two flat plate electrodes (102) are arranged in parallel inside, and a discharge cavity (104) is arranged between the two flat plate electrodes (102); the cooling fan (201) is arranged below the frame (101), and the bottom and top of the frame (101) are respectively provided with a heat dissipation air inlet (109) and a heat dissipation air outlet (110). The output end of the cooling fan (201) is arranged corresponding to the heat dissipation air inlet (109), and the heat dissipation air outlet (110) is connected to the preheating jacket through a connecting air duct (301).

3. The plate electrode ozone generator with an integrated exhaust gas decomposition unit as described in claim 2, characterized in that, The spacing of the heat dissipation fins (103) in the central area of ​​the corresponding flat plate electrode (102) is smaller than the spacing of the heat dissipation fins (103) at the edge of the corresponding flat plate electrode (102).

4. The plate electrode ozone generator with an integrated exhaust gas decomposition unit as described in claim 3, characterized in that, A phase change energy storage unit is installed in the middle of the heat dissipation bonding plate (111); the phase change energy storage unit includes a package (105), and the interior of the package (105) is filled with a phase change material (106).

5. The plate electrode ozone generator with an integrated exhaust gas decomposition unit as described in claim 4, characterized in that, The encapsulation body (105) is divided into two encapsulation structures; the encapsulation structure located in the lower section near the heat dissipation air inlet (109) is the low phase change section, and the encapsulation structure located in the upper section near the heat dissipation air outlet (110) is the high phase change section; the phase change temperature of the phase change material (106) filled in the high phase change section is higher than the phase change temperature of the phase change material (106) filled in the low phase change section.

6. The plate electrode ozone generator with an integrated exhaust gas decomposition unit as described in claim 5, characterized in that, The outer wall of the encapsulation shell (401) of the two-section encapsulation structure is provided with toothed interlocking grooves, and a number of heat dissipation fins (103) are fixedly connected with elastic sheets (108) on the side near the encapsulation shell (401), and the elastic sheets (108) are mated and attached to the toothed interlocking grooves.

7. The plate electrode ozone generator with an integrated exhaust gas decomposition unit as described in claim 2, characterized in that, The middle part of the preheating interlayer is divided into an upper interlayer chamber (403) and a lower interlayer chamber (402) by an interlayer partition (404); the middle part of the connecting air duct (301) is fixedly connected to an air duct partition (302), the lower part of the air duct partition (302) is set as a preheating air duct, the bottom port of the preheating air duct is aligned with the heat dissipation air outlet (110), and both sides of the preheating air duct are fixedly connected to a diverter (303). The upper part of the diversion pipe (303) is fixedly connected to an upper distribution air duct (305), a lower distribution air duct, and a bypass exhaust air duct (409); the upper distribution air duct (305) and the lower distribution air duct (304) are respectively connected to the upper interlayer chamber (403) and the lower interlayer chamber (402), and a distribution valve is fixedly installed in the middle of the upper distribution air duct (305), the lower distribution air duct (304), and the bypass exhaust air duct (409); A main exhaust duct (408) is provided on one side of the exhaust gas decomposition unit. The upper interlayer chamber (403) and the lower interlayer chamber (402) are both connected to the main exhaust duct (408) through the discharge pipe (411). The bypass exhaust pipe (409) is connected to the main exhaust duct (408). A treatment duct is provided above the duct partition (302). The top of the treatment duct is connected to the bottom of the exhaust gas decomposition unit, and one side of the treatment duct is connected to the main exhaust duct (408) through the side pipe (407). A main exhaust valve is fixedly installed on the top of the main exhaust duct (408).

8. The plate electrode ozone generator with an integrated exhaust gas decomposition unit as described in claim 7, characterized in that, The exhaust gas decomposition unit is divided into a front oxidation section and a rear catalytic reduction section from top to bottom. The front oxidation section is a cavity structure. The rear catalytic reduction section is equipped with an annular packing frame. The edge of the annular packing frame is filled with catalytic packing (405). The upper interlayer chamber (403) corresponds to the outer wall of the front oxidation section, and the lower interlayer chamber (402) corresponds to the outer wall of the rear catalytic reduction section.

9. The plate electrode ozone generator with an integrated exhaust gas decomposition unit as described in claim 8, characterized in that, A guide cone (406) is fixedly connected to the top center of the annular packing frame.

10. The plate electrode ozone generator with an integrated exhaust gas decomposition unit as described in claim 4, characterized in that, The phase change energy storage unit is provided with a heat-conducting frame (107) inside, and one side of the heat-conducting frame (107) is fixedly connected to the heat dissipation bonding plate (111).

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