Deodorizing apparatus and method using pulsed plasma discharge

Abstract

The application discloses a deodorization device and method using pulse plasma discharge. The device comprises a cabinet, a narrow pulse power component, a pulse plasma reaction component, a filter adsorption auxiliary component and an automatic control component. An inlet air channel is arranged in the cabinet. A gas inlet is arranged at one end of the inlet air channel. The other end of the inlet air channel is connected with an inlet of the pulse plasma reaction component. An outlet of the pulse plasma reaction component is connected with the filter adsorption auxiliary component. The narrow pulse power component is electrically connected with the pulse plasma reaction component. The automatic control component is electrically connected with the narrow pulse power component. The application takes the concentration of the oxidizing substance as the basis for adjusting the output power of the narrow pulse power component, controls the concentration of the oxidizing substance in the discharged gas to remain at a certain trace degree, ensures that the odor in the gas has been completely reacted, and keeps the trace concentration of the oxidizing substance from causing the odor to escape and indicating that the deodorization reaction is completely performed.

Description

Technical Field

[0001] This invention relates to the field of gas purification technology, specifically to a deodorization device and method employing pulsed plasma discharge. Background Technology

[0002] Currently, commonly used methods for treating odorous gases include chemical absorption, physical adsorption, masking, combustion, catalytic oxidation, biofilters, and plant-based liquid spraying. Among these, masking and plant-based liquid spraying utilize physical or odor-masking methods and cannot effectively control odorous substances. Combustion is rarely used for odor control due to its high cost. Chemical absorption and biofilters are the most widely used methods for odor control. Both methods work by first dissolving the odorous substances before a reaction occurs. Therefore, the solubility of odorous components has a significant impact on the effectiveness of these deodorization processes. Some odorous components, such as styrene, dimethyl disulfide, α-pinene, and β-pinene, are insoluble, while others, such as skatole and hydrogen sulfide, are slightly soluble. Using dissolution-based deodorization processes is ineffective because insoluble and slightly soluble substances cannot be effectively removed, thus failing to further reduce the odor concentration. While physical adsorption can indiscriminately adsorb odors, in practical applications, processes such as dry filter media often suffer from severe clogging due to the high dust and humidity in the odor treatment gas, resulting in short lifespans and expensive filter media replacements. Therefore, it is not recommended to use these methods.

[0003] Gas-to-gas reactions are essentially indiscriminate in their reaction with various types of odors, making them the optimal choice for odor control. However, existing technologies such as UV photolysis and various ion tubes are not suitable for controlling high-dust, foggy odors. These technologies are prone to severe lamp damage, have low deodorization efficiency, and the incomplete reaction of oxides leads to ozone release, potentially even exacerbating the emission of malodorous pollutants. Therefore, the development of a suitable treatment technology and reaction device for odor control is urgently needed. Summary of the Invention

[0004] To solve the above problems, the technical solution provided by the present invention is as follows:

[0005] A deodorization device employing pulsed plasma discharge includes a chassis, a narrow-pulse power supply assembly, a pulsed plasma reaction assembly, a filtration and adsorption auxiliary assembly, and an automatic control assembly. The chassis has an inlet gas duct, one end of which has a gas inlet, and the other end of which is connected to the inlet of the pulsed plasma reaction assembly. The outlet of the pulsed plasma reaction assembly is connected to the filtration and adsorption auxiliary assembly. The narrow-pulse power supply assembly is electrically connected to the pulsed plasma reaction assembly, and the automatic control assembly is electrically connected to the narrow-pulse power supply assembly.

[0006] The present invention is further configured such that the pulsed plasma reaction assembly includes a grounding frame, the grounding frame includes a first discharge mounting flange and a second discharge mounting flange, a plurality of discharge cylinders are disposed between the first discharge mounting flange and the second discharge mounting flange, high-voltage porcelain insulators are provided on both the first discharge mounting flange and the second discharge mounting flange, a first discharge bracket is connected between the high-voltage porcelain insulators, a second discharge bracket is connected between the first discharge brackets, and discharge electrode wires are connected to the second discharge brackets, the discharge electrode wires are respectively disposed inside the discharge cylinders.

[0007] The present invention is further configured such that a first lifting point is provided on the first discharge mounting flange or the second discharge mounting flange, a reaction component support frame is provided inside the chassis, the first discharge mounting flange and / or the second discharge mounting flange are mounted on the reaction component support frame, the first discharge bracket is provided with a plurality of first waist-shaped holes, the two ends of the second discharge bracket are provided with second waist-shaped holes, and the second discharge bracket is connected to the first discharge bracket by fasteners passing through the first waist-shaped holes and the second waist-shaped holes.

[0008] The present invention is further configured such that the discharge electrode includes an electrode body, a discharge sheet sleeved on the electrode body, a first retaining tube disposed between the discharge sheets, and a second retaining tube disposed at both ends of the electrode body. The discharge sheet has uniformly protruding discharge portions on its outer periphery. The upper and lower end faces of the first retaining tube and the end face of the second retaining tube near the discharge sheet are provided with positioning grooves and positioning blocks. The positioning grooves and positioning blocks on the upper end face of the first retaining tube are offset from the positioning grooves and positioning blocks on the lower end face of the same first retaining tube. The discharge portions are limited to the positioning grooves and positioning blocks adjacent to the discharge portions, and the discharge portions protrude from the surfaces of the first retaining tube and the second retaining tube. The discharge portions of adjacent discharge sheets are offset along the axial direction of the electrode body. The two ends of the electrode body are respectively connected to the second discharge bracket.

[0009] The present invention is further configured such that a power support frame is provided inside the chassis, the power support frame is located above the inlet air duct, a fixing member is provided at the bottom of the narrow pulse power supply assembly, the fixing member is connected to the power support frame, the narrow pulse power supply assembly includes a low-voltage control cabinet, a transformer and a high-voltage output cabinet, the low-voltage control cabinet is electrically connected to the automation control assembly, the low-voltage control cabinet is electrically connected to the input terminal of the transformer, the output terminal of the transformer is electrically connected to the high-voltage output cabinet, and the high-voltage output cabinet is connected to the first discharge bracket and the second discharge bracket through copper busbars and wall bushings.

[0010] The present invention is further configured such that heat sinks are provided on both sides of the transformer, a first temperature sensor and a third suspension point are provided on the transformer, the first temperature sensor is electrically connected to the automatic control component, epoxy boards are provided on both sides of the high voltage output cabinet, and a docking flange is provided at the bottom of the high voltage output cabinet.

[0011] The invention is further configured such that the chassis is provided with an outlet flange, the filter adsorption auxiliary component includes a filter adsorption housing, the bottom of the filter adsorption housing is provided with an inlet flange, the inlet flange is connected to the outlet flange, the top of the filter adsorption housing is provided with a top cover, the top cover is provided with a second lifting point, the filter adsorption housing is provided with a packing area and an air outlet area, the packing area is provided with a packing drawer, the packing drawer is filled with adsorption packing, at least one side of the air outlet area is provided with an air outlet, the air outlet area is provided with a first pressure sensor and an oxidizing substance detector, the first pressure sensor and the oxidizing substance detector are respectively electrically connected to the automatic control component.

[0012] The present invention is further configured such that the gas inlet is provided with an inlet flange, and a first airflow distribution plate and a second airflow distribution plate are provided in the inlet gas duct. The first airflow distribution plate is located near the inlet flange, and the second airflow distribution plate is located near the pulsed plasma reaction component. A second pressure sensor and a second temperature sensor are provided between the first airflow distribution plate and the second airflow distribution plate. The second pressure sensor and the second temperature sensor are respectively electrically connected to the automatic control component.

[0013] The present invention is further configured such that the bottom plate of the inlet air passage is inclined, the bottom of the chassis is provided with a drain outlet, the lowest point of the inlet air passage is connected to the drain outlet, the bottom of the chassis is provided with support legs, and the top of the chassis is provided with a fourth lifting point.

[0014] A deodorization method employing pulsed plasma discharge, using the aforementioned deodorization device, comprising:

[0015] The gas to be processed is introduced into the gas inlet, and the second temperature sensor obtains the initial temperature signal of the gas to be processed and sends it to the automatic control component. The automatic control component initializes the output power of the narrow pulse power supply component according to the initial temperature signal, so that the discharge electrode line on the pulse plasma reaction component discharges.

[0016] The gas to be treated enters each discharge cylinder of the pulse plasma reaction assembly evenly through the first and second airflow distribution plates. The discharge electrode wire discharges under high voltage to generate high-energy electrons that bombard the gas to be treated through the pulse plasma reaction assembly. The gas to be treated is activated, decomposed and ionized to generate strong oxidizing free radicals. The strong oxidizing free radicals react with the odor in the gas to be treated in an oxidation-reduction reaction.

[0017] The gas that has undergone the oxidation-reduction reaction enters the filter adsorption auxiliary component. The adsorption packing in the filter adsorption auxiliary component filters out residual odor droplets. The oxidizing substance detector detects the concentration of oxidizing substances in the gas after passing through the adsorption packing. The automatic control component steplessly adjusts the output power of the narrow pulse power supply component according to the concentration of oxidizing substances, so that the concentration of oxidizing substances in the gas after passing through the adsorption packing is maintained within a preset threshold. The purified gas is discharged from the air outlet.

[0018] During the gas processing, the first pressure sensor and the second pressure sensor respectively acquire the gas pressure of their respective areas. The automatic control component determines whether there is blockage in the inlet gas passage based on whether the gas pressure of the second pressure sensor exceeds the first pressure threshold. The automatic control component also determines whether there is blockage inside the gas reaction based on whether the gas pressure difference between the first pressure sensor and the second pressure sensor exceeds the second pressure threshold.

[0019] During the gas processing, the first temperature sensor acquires the temperature signal of the transformer, and the automatic control component determines whether the transformer is overheated or overloaded based on whether the temperature signal of the transformer exceeds the preset temperature threshold.

[0020] Compared with the prior art, the technical solution provided by this invention has the following advantages:

[0021] This deodorization device integrates a narrow pulse power supply component, a pulse plasma reaction component, a filtration and adsorption auxiliary component, an automatic control component, and an inlet air duct. Each component is installed relatively independently, making installation convenient. Furthermore, the device is arranged compactly and rationally within the chassis, making the overall device more compact than existing deodorization equipment and easier to transport.

[0022] This deodorization device employs the following steps in its gas treatment: preliminary filtration and flow equalization of the gas; discharge of the gas through a discharge electrode line to generate highly oxidizing free radicals that react with the odor in the gas in an oxidation-reduction reaction; filtration of residual odor droplets after the oxidation-reduction reaction; and finally, discharge of purified gas. In actual odor treatment, the odor conditions often fluctuate in real time, requiring the equipment to have a high degree of real-time adjustment capability. This deodorization device integrates automated control components and an oxidizing substance detector. By monitoring the concentration of oxidizing substances in the treated gas, this concentration is used as the basis for adjusting the output power of the narrow-pulse power supply component, controlling the concentration of oxidizing substances in the discharged gas to maintain a certain trace level. This ensures that the odor in the gas has been completely reacted, and the trace concentration of oxidizing substances is maintained so as not to cause odor to escape while indicating that the deodorization reaction has been thorough. Simultaneously, this deodorization device also integrates temperature and pressure sensors to provide feedback on the device's operating status.

[0023] In this technical solution, the discharge electrode wire on the pulse plasma reaction assembly uses a first clamp and a second clamp to position the discharge plates. The first clamp serves as a positioning component between the discharge plates, and the second clamp serves as a positioning component for the first and last discharge plates. Positioning grooves and positioning blocks are provided around the upper and lower end faces of the first clamp and around the end face of the second clamp near the discharge plate. The positioning grooves and positioning blocks on the upper end face of the same first clamp are staggered with those on the lower end face. The discharge portion of the discharge plate is confined between the positioning grooves and positioning blocks of adjacent clamps. When the discharge plates and the first clamps are stacked and fitted in sequence, the discharge portions on adjacent discharge plates are staggered along the axial direction of the electrode wire body, making the discharge point distribution on the single discharge electrode wire more uniform and the pulse plasma area covered by the discharge points larger. Furthermore, when gas passes through the discharge electrode wire, the resistance is low and the transport is smooth. The area through which the gas flows is almost entirely the pulse plasma area, resulting in more comprehensive and thorough treatment of odorous gases in the gas. Attached Figure Description

[0024] Figure 1 This is a perspective view of the deodorization device according to an embodiment of the present invention.

[0025] Figure 2 This is a schematic diagram of the interior of the chassis according to an embodiment of the present invention.

[0026] Figure 3 This is a schematic diagram of the internal structure of the filter adsorption auxiliary component in an embodiment of the present invention.

[0027] Figure 4 This is a perspective view of a narrow pulse power supply component according to an embodiment of the present invention.

[0028] Figure 5 This is a perspective view of the narrow pulse power supply assembly according to an embodiment of the present invention.

[0029] Figure 6 This is a perspective view of the pulsed plasma reaction assembly according to an embodiment of the present invention.

[0030] Figure 7 This is a schematic diagram showing a partial connection between the first discharge bracket and the second discharge bracket in an embodiment of the present invention.

[0031] Figure 8 This is a three-dimensional view of the discharge electrode wires according to an embodiment of the present invention.

[0032] Figure 9 This is a partial exploded view of the discharge electrode wire in an embodiment of the present invention.

[0033] Figure 10 This is a perspective view of the first cartridge according to an embodiment of the present invention.

[0034] Figure 11 This is a perspective view of the second cartridge according to an embodiment of the present invention.

[0035] Figure 12 This is a schematic diagram of the longitudinal section of the discharge when the discharge electrode wire is installed in the discharge cylinder according to an embodiment of the present invention.

[0036] Figure 13 This is a schematic cross-sectional view of the discharge electrode wire installed in the discharge cylinder according to an embodiment of the present invention.

[0037] Figure 14 This is a schematic diagram of the cross-sectional discharge when the discharge electrode wire is installed in the discharge cylinder according to an embodiment of the present invention.

[0038] Figure 15 This is a diagram showing the effect of the pulsed plasma reaction assembly during experimental discharge in an embodiment of the present invention.

[0039] Figure 16 This is an electrical control diagram according to an embodiment of the present invention. Detailed Implementation

[0040] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings and embodiments.

[0041] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0042] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection", and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to a mechanical connection or an electrical connection, or a connection within two components; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0043] Example 1

[0044] Combined with appendix Figure 1 To be continued Figure 16 The present invention provides a deodorization device using pulsed plasma discharge, comprising a chassis 1, a narrow pulse power supply assembly 2, a pulsed plasma reaction assembly 3, a filtration and adsorption auxiliary assembly 4, and an automatic control assembly 5. The chassis 1 is provided with an inlet air duct 11, one end of which is provided with a gas inlet 111, and the other end of which is connected to the inlet of the pulsed plasma reaction assembly 3. The outlet of the pulsed plasma reaction assembly 3 is connected to the filtration and adsorption auxiliary assembly 4. The narrow pulse power supply assembly 2 is electrically connected to the pulsed plasma reaction assembly 3, and the automatic control assembly 5 is electrically connected to the narrow pulse power supply assembly 2.

[0045] In the above embodiments, the automation control component 5 includes at least a controller, which is a programmable logic controller (PLC). In another embodiment, the automation control component 5 may also be a microcontroller (MCU), which can receive signals from the instruments inside the device and adjust the output power of the narrow pulse power supply component 2 according to the signals. At the same time, the automation control component 5 may also include a display unit and an alarm unit to display the operating status of the device and to issue an alarm due to abnormal operation.

[0046] In the above embodiments, the connection between the inlet airway 11, the pulsed plasma reaction component 3, and the filter adsorption auxiliary component 4 is a spatial connection relationship in the direction of gas flow, and is not limited to a structural cooperation connection relationship.

[0047] In the above embodiments, the operation of the pulsed plasma reaction component 3 is derived from the output power of the narrow pulse power supply component 2, i.e., the pulsed plasma technology for gas-to-gas reaction of odor in this invention. During the discharge process of the narrow pulse power supply component 2, a partial plasma phenomenon, also known as plasma phenomenon, will occur in the region of the pulsed plasma reaction component 3. The technical principle is to generate high-energy electrons (5eV~20eV) under high voltage discharge to bombard gas molecules (O2 and H2O, etc.) in the reactor; after activation, decomposition and ionization processes, highly oxidizing free radicals (•OH, •O), atomic oxygen (O) and ozone (O3) are generated. These strong oxidizing substances can undergo a full oxidation-reduction reaction with the odor in the gas (technically effective for all known malodorous components), ultimately achieving the purpose of gas purification.

[0048] In this embodiment, the pulsed plasma reaction assembly 3 includes a grounding frame 31, which includes a first discharge mounting flange 311 and a second discharge mounting flange 312. A plurality of discharge cylinders 313 are disposed between the first discharge mounting flange 311 and the second discharge mounting flange 312. High-voltage porcelain insulators 314 are provided on both the first discharge mounting flange 311 and the second discharge mounting flange 312. A first discharge bracket 315 is connected between the high-voltage porcelain insulators 314. A second discharge bracket 316 is connected between the first discharge brackets 315. Discharge electrode wires 32 are connected to the second discharge brackets 316. The discharge electrode wires 32 are respectively disposed inside the discharge cylinders 313.

[0049] In the above embodiment, the discharge cylinders 313 are arranged in an array between the first discharge mounting flange 311 and the second discharge mounting flange 312, and the first discharge bracket 315 and the second discharge bracket 316 constitute a conductive bracket to provide support and conductivity for the discharge electrode wire 32.

[0050] In this embodiment, the first discharge mounting flange 311 or the second discharge mounting flange 312 is provided with a first lifting point 317. The chassis 1 is provided with a reaction component support frame 12. The first discharge mounting flange 311 and / or the second discharge mounting flange 312 are mounted on the reaction component support frame 12. The first discharge bracket 315 is provided with a plurality of first waist-shaped holes 3151. The two ends of the second discharge bracket 316 are provided with second waist-shaped holes 3161. The second discharge bracket 316 is connected to the first discharge bracket 315 by fasteners passing through the first waist-shaped holes 3151 and the second waist-shaped holes 3161.

[0051] In the above embodiment, the first waist-shaped hole 3151 and the second waist-shaped hole 3161 are staggered, so that the direction of the second discharge bracket 316 on the pulse plasma reaction assembly 3 can be adjusted so that the discharge electrode wire 32 can be accurately placed in the center of the discharge cylinder 313; after the pulse plasma reaction assembly 3 is assembled, it is hoisted into the chassis 1 through the first lifting point 317.

[0052] In this embodiment, the discharge electrode 32 includes an electrode body 321, a discharge sheet 322 sleeved on the electrode body 321, a first retainer 323 disposed between the discharge sheets 322, and a second retainer 324 disposed at both ends of the electrode body 321. The discharge sheet 322 has uniformly protruding discharge portions 3221 on its outer periphery. The upper and lower end faces of the first retainer 323 and the end face of the second retainer 324 near the discharge sheet 322 are each provided with positioning grooves and positioning blocks. The positioning grooves on the upper end face of the first retainer 323 are... The positioning slot and the positioning block are offset from the positioning slot and the positioning block on the lower end face of the same first cartridge 323. The discharge part 3221 is limited between the positioning slot and the positioning block adjacent to the discharge part 3221, and the discharge part 3221 protrudes from the surface of the first cartridge 323 and the surface of the second cartridge 324. The discharge parts 3221 of adjacent discharge plates 322 are offset along the axial direction of the electrode body 321. The two ends of the electrode body 321 are respectively connected to the second discharge bracket 316.

[0053] In the above embodiments, the upper and lower end faces of the first cartridge 323 are provided with a first positioning groove 3231 and a first positioning block 3232. The first positioning groove 3231 and the first positioning block 3232 on the upper end face of the first cartridge 323 are offset from the first positioning groove 3231 and the first positioning block 3232 on the lower end face of the same first cartridge 323. The end face of the second cartridge 324 near the discharge sheet 322 is provided with a second positioning groove 3241 and a second positioning block 3242. The size of the first positioning groove 3231 is the same as the size of the second positioning groove 3241. The size of the first positioning block 3232 is the same as the size of the second positioning block 3242.

[0054] As attached Figure 8 To be continued Figure 15 As shown, the discharge electrode wire 32 is completely positioned by the first retainer 323 and the second retainer 324. The electrode wire is generally spindle-shaped, with only the discharge part 3221 protruding from the surface. The assembly, maintenance and replacement of the discharge electrode wire 32 are extremely convenient, effectively reducing costs. The discharge sheet 322 is not easily deformed. The retainer is arranged on the surface of the electrode wire body 321 to form the frame structure of the electrode wire, improving the overall rigidity and bending resistance of the discharge electrode wire. Moreover, the airflow has low resistance and smooth delivery when passing through the discharge electrode wire. The area through which the airflow flows is almost entirely the pulse plasma area, thereby improving the efficiency and effect of odor treatment.

[0055] In the above embodiment, due to the staggered arrangement of the discharge portions 3221 on the axis of the adjacent discharge plates 322, the discharge portions 3221 on the cross-section of the discharge electrode line 32 are arranged more uniformly, thereby increasing the plasma reaction area on the cross-section; the distance between the adjacent discharge plates 322 is a, and the straight-line distance from the discharge portion 3221 to the inner wall of the discharge cylinder 313 is b. Preferably, a = 0.5 to 2b.

[0056] In this embodiment, a power support frame 13 is provided inside the chassis 1. The power support frame 13 is located above the inlet air duct 11. A fixing member 21 is provided at the bottom of the narrow pulse power assembly 2. The fixing member 21 is connected to the power support frame 13. The narrow pulse power assembly 2 includes a low-voltage control cabinet 22, a transformer 23, and a high-voltage output cabinet 24. The low-voltage control cabinet 22 is electrically connected to the automation control assembly 5. The low-voltage control cabinet 22 is electrically connected to the input end of the transformer 23. The output end of the transformer 23 is electrically connected to the high-voltage output cabinet 24. The high-voltage output cabinet 24 is connected to the first discharge bracket 315 and the second discharge bracket 316 through copper busbars and wall bushings.

[0057] In the above embodiment, the narrow pulse power supply component 2 boosts the power supply through the transformer 23 to provide high voltage to the discharge electrode line 32.

[0058] In this embodiment, heat sinks 231 are provided on both sides of the transformer 23, a first temperature sensor 232 and a third suspension point 233 are provided on the transformer 23, the first temperature sensor 232 is electrically connected to the automatic control component 5, epoxy boards 241 are provided on both sides of the high voltage output cabinet 24, and a docking flange 242 is provided at the bottom of the high voltage output cabinet 24.

[0059] In the above embodiment, the first temperature sensor 232 collects the temperature on the transformer 23. When the temperature of the transformer 23 is too high, the automatic control component 5 controls the device to stop. The docking flange 242 ensures the sealing of the connection of the high voltage output cabinet 24.

[0060] In this embodiment, the chassis 1 is provided with an outlet flange 14, the filter adsorption auxiliary component 4 includes a filter adsorption housing 41, the bottom of the filter adsorption housing 41 is provided with an inlet flange 42, the inlet flange 42 is connected to the outlet flange 14, the top of the filter adsorption housing 41 is provided with a top cover 43, the top cover 43 is provided with a second lifting point 431, the filter adsorption housing 41 is provided with a filling area 411 and an air outlet area 412, the filling area 411 is provided with a filling drawer 44, the filling drawer 44 is filled with adsorption filling material, at least one side of the air outlet area 412 is provided with an air outlet 45, the air outlet area 412 is provided with a first pressure sensor 46 and an oxidizing substance detector 47, the first pressure sensor 46 and the oxidizing substance detector 47 are respectively electrically connected to the automatic control component 5.

[0061] In the above embodiments, the adsorption packing material filled in the packing drawer 44 is used to adsorb residual odor droplets. The adsorption packing material is an inorganic packing material. After adsorbing the odor droplets, the inorganic packing material continuously reacts with the oxidizing substances that have been continuously reacted with the pulsed plasma, thereby removing the odor droplets. This gives the inorganic packing material the function of continuous adsorption and continuous regeneration, which greatly increases the service life of the packing layer. Conventional packing materials have a service life of 1 to 3 months or even less under high humidity odor conditions. After this process, the service life is extended to 1 year or more, reducing the frequency of packing material replacement, reducing pollution, and reducing the owner's equipment maintenance costs.

[0062] In the above embodiment, the air outlet 45 can be a louver with three sides for low-speed diffusion of the purified gas. If it is necessary to connect the purified gas to the pipeline, the louver can be replaced with a blind plate and the top cover 43 can be replaced with a flared end to connect to the pipeline.

[0063] In this embodiment, the gas inlet 111 is provided with an inlet flange 15, and a first airflow distribution plate 112 and a second airflow distribution plate 113 are provided in the inlet gas passage 11. The first airflow distribution plate 112 is located near the inlet flange 15, and the second airflow distribution plate 113 is located near the pulsed plasma reaction assembly 3. A second pressure sensor 114 and a second temperature sensor 115 are provided between the first airflow distribution plate 112 and the second airflow distribution plate 113. The second pressure sensor 114 and the second temperature sensor 115 are electrically connected to the automatic control assembly 5, respectively.

[0064] In the above embodiment, the second pressure sensor 114 is used to detect the air pressure in the inlet air passage 11; the second temperature sensor 115 is used to detect the temperature in the inlet air passage 11. For example, when the temperature is high in summer and more odors are emitted, the system automatically runs a high-power injection deodorization mode, and when the temperature is low in winter and less odors are emitted, the system automatically runs a low-power injection mode.

[0065] In this embodiment, the bottom plate of the inlet air duct 11 is inclined, the bottom of the chassis 1 is provided with a drain outlet 16, the lowest point of the inlet air duct 11 is connected to the drain outlet 16, the bottom of the chassis 1 is provided with a support leg 17, and the top of the chassis 1 is provided with a fourth lifting point 18.

[0066] In the above embodiment, the bottom plate of the inlet air duct 11 is a sloped plate design structure, which allows the condensate in the process to be concentrated in the middle and automatically drained, ensuring that no water accumulation occurs in the equipment; the fourth lifting point 18 facilitates the lifting and transportation of the chassis 1.

[0067] In the above embodiments, the shell of the deodorizing device is integrally formed, and its wall is designed as a double-layer wall structure with insulation cotton in the middle, which can reduce condensation and allow odor to enter the gas-gas reaction more fully.

[0068] The components of this invention are serialized, with varying numbers (1-8) of pulsed plasma reaction components 3 and different output specifications of narrow pulse power supplies (i.e., 0-6kW, 0-12kW, 0-24kW, 0-48kW) depending on the required air volume (3000m³ / h~40000m³ / h). This results in a wide air volume handling range, allowing customers to choose the deodorization device that best suits their needs, as shown in Table 1 below. Regarding the floor space, compared with existing deodorization processes on the market, taking biological filter equipment as an example, the overall floor space of this deodorization equipment is 1 / 2 or less of that of a biological filter. The equipment consumes only electricity during operation, with low energy consumption and no wastewater generation.

[0069] Table 1

[0070]

[0071] The deodorization device of this invention integrates a narrow-pulse power supply component, a pulsed plasma reaction component, a filtration and adsorption auxiliary component, an automatic control component, and an inlet gas duct. Each component is installed relatively independently, facilitating installation. Furthermore, the compact and rational arrangement within the chassis makes the overall device more compact than existing deodorization equipment, facilitating transportation. The gas treatment process of this invention includes the following steps: preliminary filtration and flow equalization of the gas; discharge of the gas through a discharge electrode line to generate highly oxidizing free radicals to react with odorous gases in the gas via an oxidation-reduction reaction; filtration of residual odorous droplets from the gas after the oxidation-reduction reaction; and finally, discharge of purified gas. In actual odor treatment processes, odor conditions often fluctuate in real time, requiring equipment with high real-time adjustment capabilities. This deodorization device integrates automated control components and an oxidizing agent detector. By monitoring the concentration of oxidizing agents in the treated gas, this concentration is used as the basis for adjusting the output power of the narrow-pulse power supply component. This controls the concentration of oxidizing agents in the discharged gas to maintain a certain trace level, ensuring that the odor in the gas has been completely reacted. Maintaining a trace concentration of oxidizing agents neither causes odor to escape nor indicates that the deodorization reaction has been thorough. Simultaneously, this deodorization device also integrates temperature and pressure sensors to provide feedback on the device's operating status.

[0072] Example 2

[0073] Combined with appendix Figure 1 To be continued Figure 16 The present invention provides a deodorization method using pulsed plasma discharge, employing the deodorization device described in Example 1, comprising:

[0074] The gas to be processed is introduced into the gas inlet, and the second temperature sensor obtains the initial temperature signal of the gas to be processed and sends it to the automatic control component. The automatic control component initializes the output power of the narrow pulse power supply component according to the initial temperature signal, so that the discharge electrode line on the pulse plasma reaction component discharges.

[0075] The gas to be treated enters each discharge cylinder of the pulse plasma reaction assembly evenly through the first and second airflow distribution plates. The discharge electrode wire discharges under high voltage to generate high-energy electrons that bombard the gas to be treated through the pulse plasma reaction assembly. The gas to be treated is activated, decomposed and ionized to generate strong oxidizing free radicals. The strong oxidizing free radicals react with the odor in the gas to be treated in an oxidation-reduction reaction.

[0076] The gas that has undergone the oxidation-reduction reaction enters the filter adsorption auxiliary component. The adsorption packing in the filter adsorption auxiliary component filters out residual odor droplets. The oxidizing substance detector detects the concentration of oxidizing substances in the gas after passing through the adsorption packing. The automatic control component steplessly adjusts the output power of the narrow pulse power supply component according to the concentration of oxidizing substances, so that the concentration of oxidizing substances in the gas after passing through the adsorption packing is maintained within a preset threshold. The purified gas is discharged from the air outlet.

[0077] During the gas processing, the first pressure sensor and the second pressure sensor respectively acquire the gas pressure of their respective areas. The automatic control component determines whether there is blockage in the inlet gas passage based on whether the gas pressure of the second pressure sensor exceeds the first pressure threshold. The automatic control component also determines whether there is blockage inside the gas reaction based on whether the gas pressure difference between the first pressure sensor and the second pressure sensor exceeds the second pressure threshold.

[0078] During the gas processing, the first temperature sensor acquires the temperature signal of the transformer, and the automatic control component determines whether the transformer is overheated or overloaded based on whether the temperature signal of the transformer exceeds the preset temperature threshold.

[0079] To verify the deodorization effect of the pulsed plasma discharge deodorization device of this invention in the field of deodorization, a full-volume test was conducted using a gas volume specification of 3000-5000 m³ / h at a sewage lifting pump station in a certain area. Sewage pump stations typically use underground collection pipelines, and the collected odorous gas contains dust particles, small insects, leaves, and other debris. This experiment optimized the design of a pipeline filter at the front end of the pulsed plasma equipment, effectively preventing the impact of large particulate impurities on the deodorization equipment. The specific treatment results for odor pollutants are shown in Table 2.

[0080] Table 2. Data on the experimental treatment of odor pollutants at a sewage lifting pump station in a certain area.

[0081]

[0082] To verify the deodorization effect of pulsed plasma technology under large air volumes, a full-volume test was conducted using a waste transfer station in a certain area with an air volume of 30,000–40,000 m³ / h (the largest specification equipment). Because the transfer station generates a significant amount of dust during waste dumping, a pretreatment device (with the same process principle as the pipeline filtration unit mentioned earlier) was installed at its front end. This device has three layers of filters to prevent dust from affecting the deodorization equipment. The specific treatment of odor pollutants is shown in Table 3.

[0083] Table 3. Data on the experimental treatment of odor pollutants at a garbage transfer station in a certain area.

[0084]

[0085] As can be seen from the above 10 implementation methods, the deodorization reactor using pulsed plasma technology has a good deodorization effect, with a deodorization efficiency generally >90%. During operation in both application scenarios, the deodorization effect remained stable over a long period, with only power consumption and no other pollutants (no wastewater) generated. Special note: The overall resistance of the equipment is maintained at around 250 Pa. Compared to conventional deodorization processes, such as biological filters (with resistance between 1000 and 1500 Pa), the equipment resistance is only 1 / 4, significantly reducing the power consumption of auxiliary components such as fans, resulting in significant energy savings.

[0086] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A deodorizing device employing a pulsed plasma discharge, characterized by, The utility model relates to a narrow pulse plasma reaction device, which comprises a cabinet, a narrow pulse power supply assembly, a pulse plasma reaction assembly, a filter adsorption auxiliary assembly and an automatic control assembly. The pulse plasma reaction assembly comprises a grounding frame, the grounding frame comprises a first discharge mounting flange and a second discharge mounting flange, a plurality of discharge cylinders are arranged between the first discharge mounting flange and the second discharge mounting flange, a high-voltage porcelain bottle is arranged on the first discharge mounting flange and the second discharge mounting flange, a first discharge support is connected between the high-voltage porcelain bottles, a second discharge support is connected between the first discharge supports, a discharge electrode wire is connected to the second discharge support, and the discharge electrode wire is arranged in the discharge cylinders. A first lifting point is arranged on the first discharge mounting flange or the second discharge mounting flange, a reaction assembly support frame is arranged in the cabinet, the first discharge mounting flange and / or the second discharge mounting flange are mounted on the reaction assembly support frame, a plurality of first waist-shaped holes are arranged on the first discharge support, second waist-shaped holes are arranged at the two ends of the second discharge support, and the second discharge support is connected to the first discharge support through fasteners passing through the first waist-shaped holes and the second waist-shaped holes. The discharge electrode wire comprises an electrode wire body, discharge sheets arranged on the electrode wire body, first clamping barrels arranged between the discharge sheets and second clamping barrels arranged at the two ends of the electrode wire body, the outer periphery of each discharge sheet is uniformly provided with a protruding discharge part, the upper and lower end surfaces of the first clamping barrel and the end surface of the second clamping barrel close to the discharge sheets are each provided with a positioning groove and a positioning block, the positioning groove and the positioning block on the upper end surface of the first clamping barrel are arranged in a staggered manner with the positioning groove and the positioning block on the lower end surface of the same first clamping barrel, the discharge part is limited between the adjacent positioning groove and positioning block of the discharge part, the discharge part protrudes from the surface of the first clamping barrel and the surface of the second clamping barrel, the discharge parts of adjacent discharge sheets are arranged in a staggered manner along the axis direction of the electrode wire body, and the two ends of the electrode wire body are respectively connected to the second discharge support. The machine case is provided with an outlet flange, the filter adsorption auxiliary assembly includes a filter adsorption shell, the bottom of the filter adsorption shell is provided with an inlet flange, the inlet flange is connected with the outlet flange, the top of the filter adsorption shell is provided with a top cover, the top cover is provided with a second lifting point, the filter adsorption shell is provided with a filler area and an air outlet area, the filler area is provided with a filler drawer, the filler drawer is filled with adsorption filler, at least one side of the air outlet area is provided with an air outlet, the air outlet area is provided with a first pressure sensor and an oxidizing substance detector, and the first pressure sensor and the oxidizing substance detector are electrically connected with the automatic control assembly.

2. The deodorizing apparatus using pulsed plasma discharge according to claim 1, wherein The machine case is provided with a power support frame, the power support frame is located above the inlet air duct, the narrow pulse power supply assembly is provided with a fixing piece at the bottom, the fixing piece is connected to the power support frame, the narrow pulse power supply assembly includes a low-voltage control cabinet, a transformer and a high-voltage output cabinet, the low-voltage control cabinet is electrically connected with the automatic control assembly, the low-voltage control cabinet is electrically connected with the input end of the transformer, the output end of the transformer is electrically connected with the high-voltage output cabinet, and the high-voltage output cabinet is connected with the first discharge support and the second discharge support through copper bars and wall bushings.

3. The deodorizing apparatus using pulsed plasma discharge according to claim 2, wherein The transformer is provided with heat dissipation fins on both sides, the transformer is provided with a first temperature sensor and a third lifting point, the first temperature sensor is electrically connected with the automatic control assembly, the high-voltage output cabinet is provided with an epoxy plate on both sides, and the bottom of the high-voltage output cabinet is provided with a butt flange.

4. The deodorizing apparatus using pulsed plasma discharge according to claim 3, wherein The gas inlet is provided with an inlet flange, the inlet air duct is provided with a first airflow distribution plate and a second airflow distribution plate, the first airflow distribution plate is arranged close to the inlet flange, the second airflow distribution plate is arranged close to the pulse plasma reaction assembly, a second pressure sensor and a second temperature sensor are arranged between the first airflow distribution plate and the second airflow distribution plate, and the second pressure sensor and the second temperature sensor are electrically connected with the automatic control assembly respectively.

5. The deodorizing apparatus using pulsed plasma discharge according to claim 4, wherein The bottom plate of the inlet air duct is inclined, the bottom of the machine case is provided with a drain port, the lowest point of the inlet air duct is communicated with the drain port, the bottom of the machine case is provided with a supporting leg, and the top of the machine case is provided with a fourth lifting point.

6. A method for deodorization by means of pulsed plasma discharge, characterized in that, The deodorizing device of claim 4 or 5 comprises: The to-be-processed gas is introduced into the gas inlet, the second temperature sensor obtains an initial temperature signal of the to-be-processed gas and sends the initial temperature signal to the automatic control assembly, the automatic control assembly initializes the output power of the narrow pulse power supply assembly according to the initial temperature signal, and the discharge electrode wire on the pulse plasma reaction assembly is discharged. The to-be-processed gas uniformly enters each discharge cylinder of the pulse plasma reaction assembly through the first gas flow distribution plate and the second gas flow distribution plate. The discharge electrode wire discharges under high voltage to generate high-energy electron bombardment on the to-be-processed gas passing through the pulse plasma reaction assembly. The to-be-processed gas is activated, decomposed and ionized to generate strong oxidizing free radicals. The strong oxidizing free radicals and the odor in the to-be-processed gas perform redox reaction; The gas after the redox reaction enters the filter adsorption auxiliary assembly. The adsorption filler in the filter adsorption auxiliary assembly filters residual odor mist. The oxidizing substance detector detects the oxidizing substance concentration of the gas after the adsorption filler. The automatic control assembly steplessly adjusts the output power of the narrow pulse power assembly according to the oxidizing substance concentration, so that the oxidizing substance concentration of the gas after the adsorption filler is kept within a preset threshold. The purified gas is discharged from the air outlet. During the gas processing, the first pressure sensor and the second pressure sensor respectively acquire the gas pressure in the region. The automatic control assembly determines whether the pollution blocking occurs in the inlet air duct according to whether the gas pressure of the second pressure sensor exceeds the first pressure threshold. The automatic control assembly determines whether the pollution blocking occurs in the gas reaction interior according to whether the gas pressure difference between the first pressure sensor and the second pressure sensor exceeds the second pressure threshold. During the gas processing, the first temperature sensor acquires the temperature signal of the transformer. The automatic control assembly determines whether the transformer is overheated or overloaded according to whether the temperature signal of the transformer exceeds the preset temperature threshold.

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